feat(test): port tests/shared library from CEF

feat: unify bundle utilities under cef build-util feature

feat: reenable sandbox support in cefsimple

feat: add MainMenu.xib on mac

fix: bypass tryToTerminateApplication for Command+Q

fix: enable much smaller linux release builds

.gitignore

@@ -8,3 +8,4 @@ cargo-sources.json
 Cargo.lock
 
 /.vscode/
+**/.DS_Store

Cargo.toml

@@ -23,18 +23,20 @@ authors = [
 repository = "https://github.com/tauri-apps/cef-rs"
 
 [workspace.dependencies]
-cef = { path = "cef" }
+cef = { path = "cef", default-features = false }
 cef-dll-sys = { version = "143.4.0", path = "sys" }
 download-cef = { version = "2.2", path = "download-cef" }
 
 anyhow = "1"
 ash = "0.38"
 bindgen = "0.72"
+cargo_metadata = "0.23.1"
 clap = { version = "4", features = ["derive"] }
 cmake = "0.1.52"
 convert_case = "0.10"
 git-cliff = "2"
 git-cliff-core = "2"
+glib = "0.21"
 io-surface = "0.16"
 libc = "0.2"
 libloading = "0.9"
@@ -42,7 +44,8 @@ metal = "0.32"
 objc = "0.2"
 objc2 = "0.6.3"
 objc2-app-kit = { version = "0.3.2", default-features = false }
-objc2-io-surface = "0.3"
+objc2-foundation = "0.3.2"
+objc2-io-surface = "0.3.2"
 plist = "1"
 proc-macro2 = "1"
 quote = "1"
@@ -55,6 +58,8 @@ thiserror = "2"
 toml_edit = "0.24"
 tracing = "0.1"
 wgpu = "27"
+winres = "0.1"
+x11-dl = "2"
 
 [workspace.dependencies.windows-sys]
 version = "0.61"

README.md

@@ -52,6 +52,11 @@ $env:PATH="$env:PATH;$env:CEF_PATH"
 
 ### Run the `cefsimple` Example
 
+This command should work with each platform:
+```sh
+cargo run --bin bundle-cef-app -- cefsimple -o target/bundle
+```
+
 #### Linux
 
 ```sh
@@ -61,15 +66,15 @@ cargo run --bin cefsimple
 #### macOS
 
 ```sh
-cargo run --bin bundle_cefsimple
-open target/debug/cefsimple.app
+cargo run --bin bundle-cef-app -- cefsimple -o target/bundle
+open target/bundle/cefsimple.app
 ```
 
 #### Windows (using PowerShell)
 
 ```pwsh
-cp ./examples/cefsimple/src/win/cefsimple.exe.manifest ./target/debug/
-cargo run --bin cefsimple
+cargo run --bin bundle-cef-app -- cefsimple -o ./target/bundle
+./target/bundle/cefsimple.exe
 ```
 
 ## Contributing

cef/Cargo.toml

@@ -8,23 +8,44 @@ license.workspace = true
 authors.workspace = true
 repository.workspace = true
 
+[lib]
+
+[[bin]]
+name = "bundle-cef-app"
+
 [features]
-default = ["sandbox"]
+default = ["sandbox", "build-util"]
 dox = ["cef-dll-sys/dox"]
 sandbox = ["cef-dll-sys/sandbox"]
+
 # Unified texture import system for CEF hardware acceleration
 accelerated_osr = [
+    "ash",
+    "libc",
+    "objc",
+    "objc2-io-surface",
+    "metal",
+    "thiserror",
+    "tracing",
     "wgpu",
     "windows",
-    "libc",
-    "ash",
-    "tracing",
-    "thiserror",
-    "objc2-io-surface",
-    "objc",
-    "metal"
 ]
 
+# Build utilities, including the bundle-cef-app tool.
+build-util = [
+    "anyhow",
+    "cargo_metadata",
+    "clap",
+    "plist",
+    "semver",
+    "serde",
+    "serde_json",
+    "thiserror",
+]
+
+# Linux X11 support in bundle-cef-app.
+linux-x11 = []
+
 [package.metadata.docs.rs]
 features = ["dox"]
 
@@ -37,6 +58,13 @@ thiserror = { workspace = true, optional = true }
 tracing = { workspace = true, optional = true }
 wgpu = { workspace = true, optional = true }
 
+# bundle
+anyhow = { workspace = true, optional = true }
+clap = { workspace = true, optional = true }
+cargo_metadata = { workspace = true, optional = true }
+serde = { workspace = true, optional = true }
+serde_json = { workspace = true, optional = true }
+
 [target.'cfg(target_os = "windows")'.dependencies]
 windows-sys.workspace = true
 windows = { workspace = true, optional = true }
@@ -47,6 +75,8 @@ objc2.workspace = true
 objc2-io-surface = { workspace = true, optional = true }
 objc = { workspace = true, optional = true }
 metal = { workspace = true, optional = true }
+plist = { workspace = true, optional = true }
+semver = { workspace = true, optional = true }
 
 [target.'cfg(target_os = "linux")'.dependencies]
 libc = { workspace = true, optional = true }

cef/src/args.rs

@@ -56,9 +56,7 @@ impl Args {
 
     #[cfg(any(target_os = "macos", target_os = "linux"))]
     pub fn as_cmd_line(&self) -> Option<CommandLine> {
-        let Some(cmd_line) = command_line_create() else {
-            return None;
-        };
+        let cmd_line = command_line_create()?;
         cmd_line.init_from_argv(self.as_main_args().argc, self.as_main_args().argv.cast());
         Some(cmd_line)
     }
@@ -81,3 +79,12 @@ impl Args {
         cmd_line
     }
 }
+
+impl From<MainArgs> for Args {
+    fn from(main_args: MainArgs) -> Self {
+        Args {
+            main_args,
+            ..Default::default()
+        }
+    }
+}

cef/src/bin/bundle-cef-app/linux.rs

@@ -0,0 +1,26 @@
+use cef::build_util::linux::*;
+use clap::Parser;
+use std::{env, path::PathBuf};
+
+#[derive(Parser, Debug)]
+#[command(about, long_about = None)]
+struct Args {
+    name: String,
+    #[arg(long, default_value_t = false)]
+    release: bool,
+    #[arg(short, long)]
+    output: Option<String>,
+}
+
+pub fn main() -> anyhow::Result<()> {
+    let args = Args::parse();
+    let output = match args.output {
+        Some(output) => PathBuf::from(output),
+        None => env::current_dir()?,
+    };
+
+    let bundle_path = build_bundle(output.as_path(), &args.name, args.release)?;
+    let bundle_path = bundle_path.display();
+    println!("Run the app from {bundle_path}");
+    Ok(())
+}

cef/src/bin/bundle-cef-app/mac.rs

@@ -0,0 +1,46 @@
+use cef::build_util::mac::*;
+use clap::Parser;
+use semver::Version;
+use std::{env, path::PathBuf};
+
+#[derive(Parser, Debug)]
+#[command(about, long_about = None)]
+struct Args {
+    name: String,
+    #[arg(short, long)]
+    output: Option<String>,
+    #[arg(short, long)]
+    identifier: Option<String>,
+    #[arg(short, long)]
+    display_name: Option<String>,
+    #[arg(short, long, default_value = "English")]
+    region: String,
+    #[arg(short, long, default_value = "1.0.0")]
+    version: String,
+}
+
+pub fn main() -> anyhow::Result<()> {
+    let args = Args::parse();
+    let output = match args.output {
+        Some(output) => PathBuf::from(output),
+        None => env::current_dir()?,
+    };
+    let identifier = args
+        .identifier
+        .unwrap_or_else(|| format!("apps.tauri.cef-rs.{}", args.name));
+    let display_name = args.display_name.unwrap_or_else(|| args.name.clone());
+    let version = Version::parse(&args.version)?;
+
+    let bundle_info = BundleInfo {
+        name: args.name.clone(),
+        identifier,
+        display_name,
+        development_region: args.region,
+        version,
+    };
+
+    let bundle_path = build_bundle(output.as_path(), &args.name, bundle_info)?;
+    let bundle_path = bundle_path.display();
+    println!("Run the app from {bundle_path}");
+    Ok(())
+}

cef/src/bin/bundle-cef-app/main.rs

@@ -0,0 +1,29 @@
+#[cfg(not(feature = "build-util"))]
+fn main() {
+    let command = std::env::current_exe().expect("Failed to get current executable path");
+    eprintln!("Disabled: {command:?} was compiled without the build-util feature.");
+}
+
+#[cfg(all(feature = "build-util", target_os = "macos"))]
+mod mac;
+
+#[cfg(all(feature = "build-util", target_os = "macos"))]
+fn main() -> anyhow::Result<()> {
+    mac::main()
+}
+
+#[cfg(all(feature = "build-util", target_os = "linux"))]
+mod linux;
+
+#[cfg(all(feature = "build-util", target_os = "linux"))]
+fn main() -> anyhow::Result<()> {
+    linux::main()
+}
+
+#[cfg(all(feature = "build-util", target_os = "windows"))]
+mod win;
+
+#[cfg(all(feature = "build-util", target_os = "windows"))]
+fn main() -> anyhow::Result<()> {
+    win::main()
+}

cef/src/bin/bundle-cef-app/win.rs

@@ -0,0 +1,26 @@
+use cef::build_util::win::*;
+use clap::Parser;
+use std::{env, path::PathBuf};
+
+#[derive(Parser, Debug)]
+#[command(about, long_about = None)]
+struct Args {
+    name: String,
+    #[arg(long, default_value_t = false)]
+    release: bool,
+    #[arg(short, long)]
+    output: Option<String>,
+}
+
+pub fn main() -> anyhow::Result<()> {
+    let args = Args::parse();
+    let output = match args.output {
+        Some(output) => PathBuf::from(output),
+        None => env::current_dir()?,
+    };
+
+    let bundle_path = build_bundle(output.as_path(), &args.name, args.release)?;
+    let bundle_path = bundle_path.display();
+    println!("Run the app from {bundle_path}");
+    Ok(())
+}

cef/src/build_util/linux.rs

@@ -0,0 +1,77 @@
+use std::{
+    fs, io,
+    path::{Path, PathBuf},
+    process::Command,
+};
+
+#[derive(Debug, thiserror::Error)]
+pub enum Error {
+    #[error("I/O error: {0:?}")]
+    Io(#[from] io::Error),
+    #[error("Metadata error: {0:?}")]
+    Metadata(#[from] super::metadata::Error),
+}
+
+pub type Result<T> = std::result::Result<T, Error>;
+
+/// See https://bitbucket.org/chromiumembedded/cef/wiki/GeneralUsage.md#markdown-header-linux
+pub fn bundle(app_path: &Path, target_path: &Path, executable_name: &str) -> Result<PathBuf> {
+    let cef_path = cef_dll_sys::get_cef_dir().unwrap();
+    copy_directory(&cef_path, &app_path)?;
+
+    const LOCALES_DIR: &str = "locales";
+    copy_directory(&cef_path.join(LOCALES_DIR), &app_path.join(LOCALES_DIR))?;
+
+    copy_app(app_path, target_path, executable_name)
+}
+
+/// Similar to [`bundle`], but this will invoke `cargo build` to build the executable target.
+pub fn build_bundle(app_path: &Path, executable_name: &str, release: bool) -> Result<PathBuf> {
+    let cargo_metadata = super::metadata::get_cargo_metadata()?;
+    let target_path =
+        cargo_metadata
+            .target_directory()
+            .join(if release { "release" } else { "debug" });
+
+    cargo_build(executable_name, release)?;
+
+    bundle(app_path, &target_path, executable_name)
+}
+
+fn copy_app(app_path: &Path, target_path: &Path, executable_name: &str) -> Result<PathBuf> {
+    let executable_path = app_path.join(executable_name);
+    let target_executable = target_path.join(executable_name);
+    fs::copy(&target_executable, &executable_path)?;
+    Ok(executable_path)
+}
+
+fn copy_directory(src: &Path, dst: &Path) -> io::Result<()> {
+    fs::create_dir_all(dst)?;
+    for entry in fs::read_dir(src)? {
+        let entry = entry?;
+        let dst_path = dst.join(entry.file_name());
+        if entry.file_type()?.is_file() {
+            fs::copy(entry.path(), &dst_path)?;
+        }
+    }
+    Ok(())
+}
+
+fn cargo_build(name: &str, release: bool) -> Result<()> {
+    println!("Building {name}...");
+
+    let mut args = vec!["build"];
+    if release {
+        args.push("--release");
+    }
+    #[cfg(feature = "linux-x11")]
+    args.extend(["-F", "linux-x11"]);
+    args.extend(["--bin", name]);
+
+    let status = Command::new(super::cargo_path()).args(args).status()?;
+    if status.success() {
+        Ok(())
+    } else {
+        Err(io::Error::from(io::ErrorKind::Interrupted).into())
+    }
+}

cef/src/build_util/mac.rs

@@ -0,0 +1,342 @@
+use semver::Version;
+use serde::Serialize;
+use std::{
+    collections::HashMap,
+    fs, io,
+    path::{Path, PathBuf},
+    process::Command,
+};
+
+#[derive(Debug, thiserror::Error)]
+pub enum Error {
+    #[error("I/O error: {0:?}")]
+    Io(#[from] io::Error),
+    #[error("Metadata error: {0:?}")]
+    Metadata(#[from] super::metadata::Error),
+    #[error("Plist error: {0:?}")]
+    Plist(#[from] plist::Error),
+}
+
+pub type Result<T> = std::result::Result<T, Error>;
+
+/// Common bundle information that is shared in the [Info.plist](https://developer.apple.com/documentation/bundleresources/information-property-list) files.
+#[derive(Clone, Serialize)]
+pub struct BundleInfo {
+    /// [CFBundleName](https://developer.apple.com/documentation/bundleresources/information-property-list/cfbundlename)
+    #[serde(rename = "CFBundleName")]
+    pub name: String,
+    /// [CFBundleIdentifier](https://developer.apple.com/documentation/bundleresources/information-property-list/cfbundleidentifier)
+    #[serde(rename = "CFBundleIdentifier")]
+    pub identifier: String,
+    /// [CFBundleDisplayName](https://developer.apple.com/documentation/bundleresources/information-property-list/cfbundledisplayname)
+    #[serde(rename = "CFBundleDisplayName")]
+    pub display_name: String,
+    /// [CFBundleDevelopmentRegion](https://developer.apple.com/documentation/bundleresources/information-property-list/cfbundledevelopmentregion)
+    #[serde(rename = "CFBundleDevelopmentRegion")]
+    pub development_region: String,
+    /// [CFBundleVersion](https://developer.apple.com/documentation/bundleresources/information-property-list/cfbundleversion)
+    #[serde(rename = "CFBundleVersion", serialize_with = "serialize_version")]
+    pub version: Version,
+}
+
+impl BundleInfo {
+    pub fn new(
+        name: &str,
+        identifier: &str,
+        display_name: &str,
+        development_region: &str,
+        version: Version,
+    ) -> Self {
+        Self {
+            name: name.to_owned(),
+            identifier: identifier.to_owned(),
+            display_name: display_name.to_owned(),
+            development_region: development_region.to_owned(),
+            version,
+        }
+    }
+}
+
+/// See https://bitbucket.org/chromiumembedded/cef/wiki/GeneralUsage.md#markdown-header-macos
+pub fn bundle(
+    app_path: &Path,
+    target_path: &Path,
+    executable_name: &str,
+    helper_name: &str,
+    resources_path: Option<PathBuf>,
+    bundle_info: BundleInfo,
+) -> Result<PathBuf> {
+    let main_app_path = create_app(
+        app_path,
+        executable_name,
+        false,
+        resources_path.as_deref(),
+        bundle_info.clone(),
+        &target_path.join(executable_name),
+    )?;
+    let cef_path = cef_dll_sys::get_cef_dir().unwrap();
+    let to = main_app_path.join(FRAMEWORKS_PATH).join(FRAMEWORK);
+    if to.exists() {
+        fs::remove_dir_all(&to).unwrap();
+    }
+    copy_directory(&cef_path.join(FRAMEWORK), &to)?;
+    for helper in HELPERS {
+        let helper = format!("{executable_name} {helper}");
+        create_app(
+            &main_app_path.join(FRAMEWORKS_PATH),
+            &helper,
+            true,
+            None,
+            bundle_info.clone(),
+            &target_path.join(helper_name),
+        )?;
+    }
+    if let Some(resources_path) = resources_path {
+        let resources_path = resources_path.join("mac");
+        let target_path = main_app_path.join(RESOURCES_PATH);
+        copy_app_resources(&resources_path, &target_path)?;
+    }
+    Ok(main_app_path)
+}
+
+/// Similar to [`bundle`], but this will invoke `cargo build` to build both the main executable and
+/// helper executable targets.
+pub fn build_bundle(
+    app_path: &Path,
+    executable_name: &str,
+    bundle_info: BundleInfo,
+) -> Result<PathBuf> {
+    let cargo_metadata = super::metadata::get_cargo_metadata()?;
+    let target_path = cargo_metadata.target_directory().join("debug");
+    let bundle_metadata = cargo_metadata.parse_bundle_metadata(executable_name)?;
+
+    cargo_build(executable_name)?;
+    cargo_build(&bundle_metadata.helper_name)?;
+
+    bundle(
+        app_path,
+        &target_path,
+        executable_name,
+        &bundle_metadata.helper_name,
+        bundle_metadata.resources_path,
+        bundle_info,
+    )
+}
+
+#[derive(Serialize)]
+struct InfoPlist {
+    #[serde(flatten)]
+    bundle_info: BundleInfo,
+
+    #[serde(rename = "CFBundleExecutable")]
+    executable_name: String,
+    #[serde(rename = "CFBundleInfoDictionaryVersion")]
+    bundle_info_dictionary_version: String,
+    #[serde(rename = "CFBundlePackageType")]
+    bundle_package_type: String,
+    #[serde(rename = "CFBundleIconFile", skip_serializing_if = "String::is_empty")]
+    icon_file: String,
+    #[serde(rename = "CFBundleSignature")]
+    bundle_signature: String,
+    #[serde(
+        rename = "CFBundleShortVersionString",
+        serialize_with = "serialize_version"
+    )]
+    short_version: Version,
+    #[serde(rename = "LSEnvironment")]
+    environment: HashMap<String, String>,
+    #[serde(rename = "LSFileQuarantineEnabled")]
+    file_quarantine_enabled: bool,
+    #[serde(rename = "LSMinimumSystemVersion")]
+    minimum_system_version: String,
+    #[serde(
+        rename = "LSUIElement",
+        skip_serializing_if = "Option::is_none",
+        serialize_with = "serialize_ui_element"
+    )]
+    ui_element: Option<&'static str>,
+    #[serde(rename = "NSBluetoothAlwaysUsageDescription")]
+    bluetooth_always_usage_description: String,
+    #[serde(rename = "NSSupportsAutomaticGraphicsSwitching")]
+    supports_automatic_graphics_switching: bool,
+    #[serde(rename = "NSWebBrowserPublicKeyCredentialUsageDescription")]
+    web_browser_publickey_credential_usage_description: String,
+    #[serde(rename = "NSCameraUsageDescription")]
+    camera_usage_description: String,
+    #[serde(rename = "NSMicrophoneUsageDescription")]
+    microphone_usage_description: String,
+}
+
+impl InfoPlist {
+    fn new(
+        executable_name: &str,
+        is_helper: bool,
+        icon_file: Option<String>,
+        bundle_info: BundleInfo,
+    ) -> Self {
+        Self {
+            executable_name: executable_name.to_owned(),
+            bundle_info_dictionary_version: "6.0".to_owned(),
+            bundle_package_type: "APPL".to_owned(),
+            icon_file: icon_file.unwrap_or_default(),
+            bundle_signature: "????".to_owned(),
+            short_version: Version::new(
+                bundle_info.version.major,
+                bundle_info.version.minor,
+                bundle_info.version.patch,
+            ),
+            environment: [("MallocNanoZone".to_owned(), "0".to_owned())]
+                .into_iter()
+                .collect(),
+            file_quarantine_enabled: true,
+            minimum_system_version: "11.0".to_owned(),
+            ui_element: if is_helper { Some("1") } else { None },
+            bluetooth_always_usage_description: executable_name.to_owned(),
+            supports_automatic_graphics_switching: true,
+            web_browser_publickey_credential_usage_description: executable_name.to_owned(),
+            camera_usage_description: executable_name.to_owned(),
+            microphone_usage_description: executable_name.to_owned(),
+            bundle_info,
+        }
+    }
+}
+
+fn serialize_ui_element<S>(
+    ui_element: &Option<&'static str>,
+    serializer: S,
+) -> std::result::Result<S::Ok, S::Error>
+where
+    S: serde::Serializer,
+{
+    match ui_element {
+        Some(element) => serializer.serialize_str(element),
+        None => unreachable!("None is skipped"),
+    }
+}
+
+fn serialize_version<S>(version: &Version, serializer: S) -> std::result::Result<S::Ok, S::Error>
+where
+    S: serde::Serializer,
+{
+    serializer.serialize_str(&version.to_string())
+}
+
+const EXEC_PATH: &str = "Contents/MacOS";
+const FRAMEWORKS_PATH: &str = "Contents/Frameworks";
+const RESOURCES_PATH: &str = "Contents/Resources";
+const FRAMEWORK: &str = "Chromium Embedded Framework.framework";
+const HELPERS: &[&str] = &[
+    "Helper (GPU)",
+    "Helper (Renderer)",
+    "Helper (Plugin)",
+    "Helper (Alerts)",
+    "Helper",
+];
+
+fn create_app_layout(app_path: &Path) -> Result<PathBuf> {
+    for path in [EXEC_PATH, RESOURCES_PATH, FRAMEWORKS_PATH] {
+        fs::create_dir_all(app_path.join(path))?;
+    }
+    Ok(app_path.join("Contents"))
+}
+
+fn create_app(
+    app_path: &Path,
+    executable_name: &str,
+    is_helper: bool,
+    resources_path: Option<&Path>,
+    bundle_info: BundleInfo,
+    bin: &Path,
+) -> Result<PathBuf> {
+    let app_path = app_path.join(executable_name).with_extension("app");
+    let contents_path = create_app_layout(&app_path)?;
+    let icon_file = resources_path.and_then(|path| {
+        let icon_file = format!("{executable_name}.icns");
+        if path.join("mac").join(&icon_file).exists() {
+            Some(icon_file)
+        } else {
+            None
+        }
+    });
+    create_info_plist(
+        &contents_path,
+        executable_name,
+        bundle_info,
+        is_helper,
+        icon_file,
+    )?;
+    let executable_path = app_path.join(EXEC_PATH).join(executable_name);
+    fs::copy(bin, executable_path)?;
+    Ok(app_path)
+}
+
+fn create_info_plist(
+    contents_path: &Path,
+    executable_name: &str,
+    bundle_info: BundleInfo,
+    is_helper: bool,
+    icon_file: Option<String>,
+) -> Result<()> {
+    let info_plist = InfoPlist::new(executable_name, is_helper, icon_file, bundle_info);
+    plist::to_file_xml(contents_path.join("Info.plist"), &info_plist)?;
+    Ok(())
+}
+
+fn copy_directory(src: &Path, dst: &Path) -> io::Result<()> {
+    fs::create_dir_all(dst)?;
+    for entry in fs::read_dir(src)? {
+        let entry = entry?;
+        let dst_path = dst.join(entry.file_name());
+        if entry.file_type()?.is_dir() {
+            copy_directory(&entry.path(), &dst_path)?;
+        } else {
+            fs::copy(entry.path(), &dst_path)?;
+        }
+    }
+    Ok(())
+}
+
+fn copy_app_resources(src: &Path, dst: &Path) -> io::Result<()> {
+    fs::create_dir_all(dst)?;
+    for entry in fs::read_dir(src)? {
+        let entry = entry?;
+        let mut dst_path = dst.join(entry.file_name());
+        if entry.file_type()?.is_dir() {
+            copy_app_resources(&entry.path(), &dst_path)?;
+        } else {
+            let entry = entry.path();
+            if entry
+                .extension()
+                .map(|ext| ext == "xib")
+                .unwrap_or_default()
+            {
+                dst_path.set_extension("nib");
+                let (Some(dst_path), Some(entry)) = (dst_path.to_str(), entry.to_str()) else {
+                    return Err(io::Error::from(io::ErrorKind::NotFound));
+                };
+                let status = Command::new("xcrun")
+                    .args(["ibtool", "--compile", dst_path, entry])
+                    .status()?;
+                if !status.success() {
+                    return Err(io::Error::from(io::ErrorKind::Interrupted));
+                }
+            } else {
+                fs::copy(entry, &dst_path)?;
+            }
+        }
+    }
+    Ok(())
+}
+
+fn cargo_build(name: &str) -> Result<()> {
+    println!("Building {name}...");
+
+    let status = Command::new(super::cargo_path())
+        .args(["build", "--bin", name])
+        .status()?;
+    if status.success() {
+        Ok(())
+    } else {
+        Err(io::Error::from(io::ErrorKind::Interrupted).into())
+    }
+}

cef/src/build_util/metadata.rs

@@ -0,0 +1,86 @@
+use serde::Deserialize;
+use std::path::PathBuf;
+
+#[derive(Debug, thiserror::Error)]
+pub enum Error {
+    #[error("Cargo metadata error: {0:?}")]
+    Metadata(#[from] cargo_metadata::Error),
+    #[error("Missing package metadata for {0}")]
+    MissingPackageMetadata(String),
+}
+
+pub type Result<T> = std::result::Result<T, Error>;
+
+#[derive(Deserialize)]
+struct PackageMetadata {
+    cef: Cef,
+}
+
+#[derive(Deserialize)]
+struct Cef {
+    bundle: CargoBundleMetadata,
+}
+
+#[derive(Deserialize)]
+struct CargoBundleMetadata {
+    #[cfg(target_os = "macos")]
+    helper_name: String,
+    resources_path: Option<String>,
+}
+
+pub struct BundleMetadata {
+    #[cfg(target_os = "macos")]
+    pub helper_name: String,
+    pub resources_path: Option<PathBuf>,
+}
+
+impl BundleMetadata {
+    pub fn parse(executable: &str, metadata: &cargo_metadata::Metadata) -> Option<Self> {
+        let package = metadata
+            .packages
+            .iter()
+            .find(|p| p.targets.iter().any(|t| t.name == executable))?;
+        let package_metadata =
+            serde_json::from_value::<PackageMetadata>(package.metadata.clone()).ok()?;
+        let resources_path = package_metadata
+            .cef
+            .bundle
+            .resources_path
+            .as_deref()
+            .and_then(|resources_path| {
+                package
+                    .manifest_path
+                    .clone()
+                    .into_std_path_buf()
+                    .parent()
+                    .map(|manifest_dir| manifest_dir.join(resources_path))
+            });
+        Some(Self {
+            #[cfg(target_os = "macos")]
+            helper_name: package_metadata.cef.bundle.helper_name,
+            resources_path,
+        })
+    }
+}
+
+pub struct CargoMetadata(cargo_metadata::Metadata);
+
+impl CargoMetadata {
+    pub fn target_directory(&self) -> PathBuf {
+        PathBuf::from(&self.0.target_directory)
+    }
+
+    pub fn parse_bundle_metadata(&self, executable: &str) -> Result<BundleMetadata> {
+        BundleMetadata::parse(executable, &self.0)
+            .ok_or_else(|| Error::MissingPackageMetadata(executable.to_owned()))
+    }
+}
+
+/// Run `cargo metadata` to determine the configuration for the current workspace/package.
+pub fn get_cargo_metadata() -> Result<CargoMetadata> {
+    let metadata = cargo_metadata::MetadataCommand::new()
+        .no_deps()
+        .other_options(vec!["--frozen".to_string()])
+        .exec()?;
+    Ok(CargoMetadata(metadata))
+}

cef/src/build_util/mod.rs

@@ -0,0 +1,18 @@
+use std::env;
+
+pub mod metadata;
+
+#[cfg(target_os = "macos")]
+pub mod mac;
+
+#[cfg(target_os = "linux")]
+pub mod linux;
+
+#[cfg(target_os = "windows")]
+pub mod win;
+
+/// Prefer the path in the `CARGO` environment variable if specified, otherwise just execute
+/// `cargo` from wherever it is found in the `PATH`.
+fn cargo_path() -> String {
+    env::var("CARGO").unwrap_or_else(|_| "cargo".to_string())
+}

cef/src/build_util/win/mod.rs

@@ -0,0 +1,117 @@
+use std::{
+    fs,
+    io::{self, Write},
+    path::{Path, PathBuf},
+    process::Command,
+};
+
+#[derive(Debug, thiserror::Error)]
+pub enum Error {
+    #[error("I/O error: {0:?}")]
+    Io(#[from] io::Error),
+    #[error("Metadata error: {0:?}")]
+    Metadata(#[from] super::metadata::Error),
+}
+
+pub type Result<T> = std::result::Result<T, Error>;
+
+/// See https://bitbucket.org/chromiumembedded/cef/wiki/GeneralUsage.md#markdown-header-linux
+pub fn bundle(app_path: &Path, target_path: &Path, executable_name: &str) -> Result<PathBuf> {
+    let cef_path = cef_dll_sys::get_cef_dir().unwrap();
+    copy_directory(&cef_path, &app_path)?;
+
+    const LOCALES_DIR: &str = "locales";
+    copy_directory(&cef_path.join(LOCALES_DIR), &app_path.join(LOCALES_DIR))?;
+
+    copy_app(app_path, target_path, executable_name)
+}
+
+/// Similar to [`bundle`], but this will invoke `cargo build` to build the executable target.
+pub fn build_bundle(app_path: &Path, executable_name: &str, release: bool) -> Result<PathBuf> {
+    let cargo_metadata = super::metadata::get_cargo_metadata()?;
+    let target_path =
+        cargo_metadata
+            .target_directory()
+            .join(if release { "release" } else { "debug" });
+
+    cargo_build(executable_name, release)?;
+
+    bundle(app_path, &target_path, executable_name)
+}
+
+const MANIFEST_CONTENT: &[u8] = include_bytes!("cef-app.exe.manifest");
+
+fn copy_app(app_path: &Path, target_path: &Path, executable_name: &str) -> Result<PathBuf> {
+    let mut manifest_file =
+        fs::File::create(app_path.join(format!("{executable_name}.exe.manifest")))?;
+    manifest_file.write_all(MANIFEST_CONTENT)?;
+
+    #[cfg(feature = "sandbox")]
+    {
+        let dll_name = format!("{executable_name}.dll");
+        let dll_path = app_path.join(&dll_name);
+        let target_dll = target_path.join(&dll_name);
+        fs::copy(&target_dll, &dll_path)?;
+
+        let pdb_name = format!("{executable_name}.pdb");
+        let pdb_path = app_path.join(&pdb_name);
+        let target_pdb = target_path.join(&pdb_name);
+        fs::copy(&target_pdb, &pdb_path)?;
+
+        let executable_name = format!("{executable_name}.exe");
+        let executable_path = app_path.join(&executable_name);
+        let cef_path = cef_dll_sys::get_cef_dir().unwrap();
+        let target_executable = cef_path.join("bootstrap.exe");
+        fs::copy(&target_executable, &executable_path)?;
+
+        Ok(executable_path)
+    }
+
+    #[cfg(not(feature = "sandbox"))]
+    {
+        let executable_name = format!("{executable_name}.exe");
+        let executable_path = app_path.join(&executable_name);
+        let target_executable = target_path.join(executable_name);
+        fs::copy(&target_executable, &executable_path)?;
+
+        Ok(executable_path)
+    }
+}
+
+fn copy_directory(src: &Path, dst: &Path) -> io::Result<()> {
+    fs::create_dir_all(dst)?;
+    for entry in fs::read_dir(src)? {
+        let entry = entry?;
+        let dst_path = dst.join(entry.file_name());
+        if entry.file_type()?.is_file()
+            && !entry
+                .path()
+                .extension()
+                .map(|ext| ext == "exe")
+                .unwrap_or_default()
+        {
+            fs::copy(entry.path(), &dst_path)?;
+        }
+    }
+    Ok(())
+}
+
+fn cargo_build(name: &str, release: bool) -> Result<()> {
+    println!("Building {name}...");
+
+    let mut args = vec!["build"];
+    if release {
+        args.push("--release");
+    }
+    #[cfg(feature = "sandbox")]
+    args.extend_from_slice(&["-p", name, "--lib"]);
+    #[cfg(not(feature = "sandbox"))]
+    args.extend_from_slice(&["--no-default-features", "--bin", name]);
+
+    let status = Command::new(super::cargo_path()).args(args).status()?;
+    if status.success() {
+        Ok(())
+    } else {
+        Err(io::Error::from(io::ErrorKind::Interrupted).into())
+    }
+}

cef/src/lib.rs

@@ -3,6 +3,8 @@
 pub mod args;
 pub mod rc;
 pub mod string;
+pub mod window_info;
+pub mod wrapper;
 
 #[cfg(target_os = "macos")]
 pub mod application_mac;
@@ -16,10 +18,15 @@ pub mod sandbox;
 #[cfg(feature = "accelerated_osr")]
 pub mod osr_texture_import;
 
+#[cfg(feature = "build-util")]
+pub mod build_util;
+
 #[rustfmt::skip]
 mod bindings;
 pub use bindings::*;
 
+pub use rc::Rc as _;
+
 pub use cef_dll_sys as sys;
 
 #[cfg(all(
@@ -27,3 +34,7 @@ pub use cef_dll_sys as sys;
     feature = "accelerated_osr"
 ))]
 compile_error!("accelerated_osr not supported on this platform");
+
+pub const SEEK_SET: i32 = 0;
+pub const SEEK_CUR: i32 = 1;
+pub const SEEK_END: i32 = 2;

cef/src/sandbox.rs

@@ -43,6 +43,12 @@ impl Sandbox {
     }
 }
 
+impl Default for Sandbox {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl Drop for Sandbox {
     fn drop(&mut self) {
         unsafe {

cef/src/string.rs

@@ -856,6 +856,7 @@ impl<'a, T> From<&'a mut CefStringCollection<T>> for Option<&'a mut T> {
 }
 
 /// See [_cef_string_list_t] for more documentation.
+#[derive(Clone)]
 pub struct CefStringList(CefStringCollection<_cef_string_list_t>);
 
 impl CefStringList {
@@ -988,6 +989,7 @@ impl Debug for CefStringList {
 }
 
 /// See [_cef_string_map_t] for more documentation.
+#[derive(Clone)]
 pub struct CefStringMap(CefStringCollection<_cef_string_map_t>);
 
 impl CefStringMap {
@@ -1134,6 +1136,7 @@ impl Debug for CefStringMap {
 }
 
 /// See [_cef_string_multimap_t] for more documentation.
+#[derive(Clone)]
 pub struct CefStringMultimap(CefStringCollection<_cef_string_multimap_t>);
 
 impl CefStringMultimap {

cef/src/window_info.rs

@@ -0,0 +1,60 @@
+use crate::{sys::cef_window_handle_t, *};
+#[cfg(target_os = "windows")]
+use windows_sys::Win32::UI::WindowsAndMessaging::*;
+
+impl WindowInfo {
+    /// Create the browser as a child window.
+    pub fn set_as_child(self, parent: cef_window_handle_t, bounds: &Rect) -> Self {
+        Self {
+            #[cfg(target_os = "windows")]
+            style: WS_CHILD | WS_CLIPCHILDREN | WS_CLIPSIBLINGS | WS_TABSTOP | WS_VISIBLE,
+            #[cfg(any(target_os = "linux", target_os = "windows"))]
+            parent_window: parent,
+            #[cfg(target_os = "macos")]
+            parent_view: parent,
+            bounds: bounds.clone(),
+            #[cfg(target_os = "macos")]
+            hidden: 0,
+            ..self
+        }
+    }
+
+    /// Create the browser as a popup window.
+    #[cfg(target_os = "windows")]
+    pub fn set_as_popup(self, parent: cef_window_handle_t, title: &str) -> Self {
+        Self {
+            window_name: CefString::from(title),
+            parent_window: parent,
+            style: WS_OVERLAPPEDWINDOW | WS_CLIPCHILDREN | WS_CLIPSIBLINGS | WS_VISIBLE,
+            bounds: Rect {
+                x: CW_USEDEFAULT,
+                y: CW_USEDEFAULT,
+                width: CW_USEDEFAULT,
+                height: CW_USEDEFAULT,
+            },
+            ..self
+        }
+    }
+
+    /// Create the browser using windowless (off-screen) rendering. No window
+    /// will be created for the browser and all rendering will occur via the
+    /// CefRenderHandler interface. The |parent| value will be used to identify
+    /// monitor info and to act as the parent window for dialogs, context menus,
+    /// etc. If |parent| is not provided then the main screen monitor will be used
+    /// and some functionality that requires a parent window may not function
+    /// correctly. In order to create windowless browsers the
+    /// CefSettings.windowless_rendering_enabled value must be set to true.
+    /// Transparent painting is enabled by default but can be disabled by setting
+    /// CefBrowserSettings.background_color to an opaque value.
+    pub fn set_as_windowless(self, parent: cef_window_handle_t) -> Self {
+        Self {
+            windowless_rendering_enabled: 1,
+            #[cfg(any(target_os = "linux", target_os = "windows"))]
+            parent_window: parent,
+            #[cfg(target_os = "macos")]
+            parent_view: parent,
+            runtime_style: RuntimeStyle::ALLOY,
+            ..self
+        }
+    }
+}

cef/src/wrapper/browser_info_map.rs

@@ -0,0 +1,164 @@
+use std::{collections::BTreeMap, ops::ControlFlow};
+
+#[derive(Clone, Copy, PartialEq, Eq)]
+pub enum BrowserInfoMapVisitorResult {
+    /// Remove the entry from the map.
+    RemoveEntry,
+    /// Keep the entry in the map.
+    KeepEntry,
+}
+
+/// Implement this interface to visit and optionally delete objects in the map.
+pub trait BrowserInfoMapVisitor<K: Copy + Ord, V: Clone> {
+    fn on_next_info(
+        &self,
+        browser_id: i32,
+        key: K,
+        value: &V,
+    ) -> ControlFlow<BrowserInfoMapVisitorResult, BrowserInfoMapVisitorResult>;
+}
+
+#[derive(Default)]
+pub struct BrowserInfoMap<K: Clone + Ord, V: Clone> {
+    map: BTreeMap<i32, BTreeMap<K, V>>,
+}
+
+impl<K: Copy + Ord, V: Clone> BrowserInfoMap<K, V> {
+    /// Add an object associated with the specified ID values.
+    pub fn insert(&mut self, browser_id: i32, key: K, value: V) {
+        self.map.entry(browser_id).or_default().insert(key, value);
+    }
+
+    /// Find the object with the specified ID values. |visitor| can optionally be
+    /// used to evaluate or remove the object at the same time. If the object is
+    /// removed using the Visitor the caller is responsible for destroying it.
+    pub fn find(
+        &mut self,
+        browser_id: i32,
+        key: K,
+        visitor: Option<&dyn BrowserInfoMapVisitor<K, V>>,
+    ) -> Option<V> {
+        let info_map = self.map.get_mut(&browser_id)?;
+        let entry = info_map.get(&key)?;
+
+        if let Some(visitor) = visitor {
+            let result = match visitor.on_next_info(browser_id, key, entry) {
+                ControlFlow::Break(result) => result,
+                ControlFlow::Continue(result) => result,
+            };
+
+            if result == BrowserInfoMapVisitorResult::RemoveEntry {
+                let entry = info_map.remove(&key);
+                if info_map.is_empty() {
+                    self.map.remove(&browser_id);
+                }
+                return entry;
+            }
+        }
+
+        Some(entry.clone())
+    }
+
+    /// Find all objects. If any objects are removed using the Visitor the caller
+    /// is responsible for destroying them.
+    pub fn find_all(&mut self, visitor: &dyn BrowserInfoMapVisitor<K, V>) {
+        let browser_ids: Vec<_> = self.map.keys().copied().collect();
+        for browser_id in browser_ids {
+            let info_map = self
+                .map
+                .get_mut(&browser_id)
+                .expect("missing browser info map");
+
+            let mut keep_going = true;
+            let mut removed = vec![];
+            let keys: Vec<_> = info_map.keys().copied().collect();
+            for key in keys {
+                let value = info_map.get(&key).expect("missing value");
+                let result = visitor.on_next_info(browser_id, key, value);
+                let (stop, result) = match result {
+                    ControlFlow::Break(result) => (true, result),
+                    ControlFlow::Continue(result) => (false, result),
+                };
+
+                if result == BrowserInfoMapVisitorResult::RemoveEntry {
+                    removed.push(key);
+                }
+
+                if stop {
+                    keep_going = false;
+                    break;
+                }
+            }
+
+            for key in removed {
+                info_map.remove(&key);
+            }
+
+            if info_map.is_empty() {
+                self.map.remove(&browser_id);
+            }
+
+            if !keep_going {
+                break;
+            }
+        }
+    }
+
+    /// Find all objects associated with the specified browser. If any objects are
+    /// removed using the Visitor the caller is responsible for destroying them.
+    pub fn find_browser_all(&mut self, browser_id: i32, visitor: &dyn BrowserInfoMapVisitor<K, V>) {
+        let info_map = self
+            .map
+            .get_mut(&browser_id)
+            .expect("missing browser info map");
+
+        let mut removed = vec![];
+        let keys: Vec<_> = info_map.keys().copied().collect();
+        for key in keys {
+            let value = info_map.get(&key).expect("missing value");
+            let result = visitor.on_next_info(browser_id, key, value);
+            let (stop, result) = match result {
+                ControlFlow::Break(result) => (true, result),
+                ControlFlow::Continue(result) => (false, result),
+            };
+
+            if result == BrowserInfoMapVisitorResult::RemoveEntry {
+                removed.push(key);
+            }
+
+            if stop {
+                break;
+            }
+        }
+
+        for key in removed {
+            info_map.remove(&key);
+        }
+
+        if info_map.is_empty() {
+            self.map.remove(&browser_id);
+        }
+    }
+
+    /// Returns true if the map is empty.
+    pub fn is_empty(&self) -> bool {
+        self.map.is_empty()
+    }
+
+    /// Returns the number of objects in the map.
+    pub fn len(&self) -> usize {
+        self.map.values().map(|info_map| info_map.len()).sum()
+    }
+
+    /// Returns the number of objects in the map that are associated with the
+    /// specified browser.
+    pub fn browser_len(&self, browser_id: i32) -> usize {
+        self.map
+            .get(&browser_id)
+            .map_or(0, |info_map| info_map.len())
+    }
+
+    pub fn clear(&mut self) {
+        self.map.clear();
+    }
+}

cef/src/wrapper/byte_read_handler.rs

@@ -0,0 +1,110 @@
+//! Thread safe implementation of the [ReadHandler] type for reading an in-memory array of bytes.
+use crate::*;
+use std::sync::{Arc, Mutex};
+
+pub struct ByteStream {
+    bytes: Vec<u8>,
+    offset: usize,
+}
+
+impl ByteStream {
+    pub fn new(bytes: Vec<u8>) -> Self {
+        ByteStream { bytes, offset: 0 }
+    }
+}
+
+wrap_read_handler! {
+    pub struct ByteReadHandler {
+        stream: Arc<Mutex<ByteStream>>,
+    }
+
+    impl ReadHandler {
+        #[allow(clippy::not_unsafe_ptr_arg_deref)]
+        fn read(&self, ptr: *mut u8, size: usize, n: usize) -> usize {
+            let Ok(mut stream) = self.stream.lock() else {
+                return 0;
+            };
+
+            let s = (stream.bytes.len() - stream.offset) / size;
+            let ret = s.min(n);
+            let buffer = unsafe { std::slice::from_raw_parts_mut(ptr, ret * size) };
+            buffer.copy_from_slice(&stream.bytes[stream.offset..stream.offset + ret * size]);
+            stream.offset += ret * size;
+            ret
+        }
+
+        fn seek(&self, offset: i64, whence: ::std::os::raw::c_int) -> ::std::os::raw::c_int {
+            let Ok(mut stream) = self.stream.lock() else {
+                return -1;
+            };
+
+            const SEEK_SET: i32 = 0;
+            const SEEK_CUR: i32 = 1;
+            const SEEK_END: i32 = 2;
+
+            match whence {
+                SEEK_SET => {
+                    if offset < 0 {
+                        return -1;
+                    }
+                    let offset = offset as usize;
+                    if offset > stream.bytes.len() {
+                        return -1;
+                    }
+                    stream.offset = offset;
+                    0
+                }
+                SEEK_CUR => {
+                    if offset < 0 {
+                        let offset = -offset as usize;
+                        if offset > stream.offset {
+                            return -1;
+                        }
+                        stream.offset -= offset;
+                    } else {
+                        let offset = offset as usize;
+                        if offset + stream.offset > stream.bytes.len() {
+                            return -1;
+                        }
+                        stream.offset += offset;
+                    }
+                    0
+                }
+                SEEK_END => {
+                    if offset > 0 {
+                        return -1;
+                    }
+                    let offset = -offset as usize;
+                    if offset > stream.bytes.len() {
+                        return -1;
+                    }
+                    stream.offset = stream.bytes.len() - offset;
+                    0
+                }
+                _ => -1,
+            }
+        }
+
+        fn tell(&self) -> i64 {
+            let Ok(stream) = self.stream.lock() else {
+                return 0;
+            };
+            stream.offset as i64
+        }
+
+        fn eof(&self) -> i32 {
+            let Ok(stream) = self.stream.lock() else {
+                return 1;
+            };
+            if stream.offset >= stream.bytes.len() {
+                1
+            } else {
+                0
+            }
+        }
+
+        fn may_block(&self) -> i32 {
+            0
+        }
+    }
+}

cef/src/wrapper/message_router_utils.rs

@@ -0,0 +1,726 @@
+use super::message_router::*;
+use crate::*;
+use std::{
+    io::{self, Cursor, Read, Write},
+    marker::PhantomData,
+    mem,
+    rc::Rc,
+    slice,
+    sync::Arc,
+};
+
+const NO_ERROR: i32 = 0;
+
+const CONTEXT_ID: usize = 0;
+const REQUEST_ID: usize = 1;
+const RENDERER_PAYLOAD: usize = 2;
+const IS_SUCCESS: usize = 2;
+const BROWSER_PAYLOAD: usize = 3;
+const IS_PERSISTENT: usize = 3;
+
+pub trait ProcessMessageBuilder {
+    fn build_browser_response(&self, context_id: i32, request_id: i32) -> Option<ProcessMessage>;
+    fn build_renderer_message(
+        &self,
+        context_id: i32,
+        request_id: i32,
+        persistent: bool,
+    ) -> Option<ProcessMessage>;
+}
+
+#[derive(Clone, Default)]
+pub enum MessagePayload {
+    #[default]
+    Empty,
+    String(CefStringUtf8),
+    Binary(Arc<dyn BinaryBuffer>),
+}
+
+impl MessagePayload {
+    fn size(&self) -> usize {
+        match self {
+            Self::Empty => 0,
+            Self::String(s) => s.as_slice().map(|s| s.len()).unwrap_or(0),
+            Self::Binary(b) => b.data().len(),
+        }
+    }
+
+    fn read_string<R: Read>(f: &mut R) -> io::Result<Self> {
+        let mut buffer = vec![];
+        f.read_to_end(&mut buffer)?;
+        Ok(String::from_utf8(buffer)
+            .map(|value| value.as_str().into())
+            .unwrap_or(Self::Empty))
+    }
+
+    // fn read_binary<R: Read>(f: &mut R) -> io::Result<Self> {
+    //     let mut buffer = vec![];
+    //     f.read_to_end(&mut buffer)?;
+    //     Ok(binary_value_create(Some(&buffer))
+    //         .map(|value| Self::Binary(Arc::new(BinaryValueBuffer::new(None, Some(value)))))
+    //         .unwrap_or(Self::Empty))
+    // }
+
+    fn write<W: Write>(&self, f: &mut W) -> io::Result<()> {
+        let buffer = match self {
+            Self::String(s) => s.as_slice(),
+            Self::Binary(b) if !b.data().is_empty() => Some(b.data()),
+            _ => None,
+        };
+        if let Some(buffer) = buffer {
+            f.write_all(buffer)?;
+        }
+        Ok(())
+    }
+}
+
+impl From<&CefString> for MessagePayload {
+    fn from(s: &CefString) -> Self {
+        Self::String(CefStringUtf8::from(s))
+    }
+}
+
+impl From<&str> for MessagePayload {
+    fn from(s: &str) -> Self {
+        Self::String(CefStringUtf8::from(s))
+    }
+}
+
+impl From<Option<&V8Value>> for MessagePayload {
+    fn from(v: Option<&V8Value>) -> Self {
+        let b = v.and_then(|v| {
+            let ptr = v.array_buffer_data();
+            let size = v.array_buffer_byte_length();
+            if ptr.is_null() || size == 0 {
+                return None;
+            }
+
+            let data = unsafe { slice::from_raw_parts(ptr as *const u8, size) };
+            binary_value_create(Some(data))
+        });
+        b.map(|value| Self::Binary(Arc::new(BinaryValueBuffer::new(None, Some(value)))))
+            .unwrap_or(Self::Empty)
+    }
+}
+
+impl From<&[u8]> for MessagePayload {
+    fn from(data: &[u8]) -> Self {
+        if data.is_empty() {
+            Self::Empty
+        } else {
+            Self::Binary(Arc::new(BinaryValueBuffer::new(
+                None,
+                binary_value_create(Some(data)),
+            )))
+        }
+    }
+}
+
+#[derive(Clone, Default)]
+pub struct BrowserMessage {
+    pub context_id: i32,
+    pub request_id: i32,
+    pub is_success: bool,
+    pub error_code: i32,
+    pub payload: MessagePayload,
+}
+
+impl From<Option<ProcessMessage>> for BrowserMessage {
+    fn from(message: Option<ProcessMessage>) -> Self {
+        let Some(message) = message else {
+            return Default::default();
+        };
+
+        if let Some(args) = message.argument_list() {
+            let context_id = args.int(CONTEXT_ID);
+            let request_id = args.int(REQUEST_ID);
+            let is_success = args.bool(IS_SUCCESS);
+
+            if is_success != 0 {
+                debug_assert_eq!(args.size(), 4);
+                match args.get_type(BROWSER_PAYLOAD) {
+                    ValueType::STRING => Self {
+                        context_id,
+                        request_id,
+                        is_success: true,
+                        error_code: NO_ERROR,
+                        payload: MessagePayload::String(CefStringUtf8::from(&CefString::from(
+                            &args.string(BROWSER_PAYLOAD),
+                        ))),
+                    },
+                    ValueType::BINARY => Self {
+                        context_id,
+                        request_id,
+                        is_success: true,
+                        error_code: NO_ERROR,
+                        payload: MessagePayload::Binary(Arc::new(BinaryValueBuffer::new(
+                            Some(message),
+                            args.binary(BROWSER_PAYLOAD),
+                        ))),
+                    },
+                    payload_type => {
+                        assert_eq!(payload_type, ValueType::NULL);
+                        Self {
+                            context_id,
+                            request_id,
+                            is_success: true,
+                            error_code: NO_ERROR,
+                            payload: MessagePayload::Binary(Arc::new(EmptyBinaryBuffer)),
+                        }
+                    }
+                }
+            } else {
+                debug_assert_eq!(args.size(), 5);
+                Self {
+                    context_id,
+                    request_id,
+                    is_success: false,
+                    error_code: args.int(3),
+                    payload: MessagePayload::String(CefStringUtf8::from(&CefString::from(
+                        &args.string(4),
+                    ))),
+                }
+            }
+        } else if let Some(region) = message
+            .shared_memory_region()
+            .filter(|region| region.is_valid() != 0)
+        {
+            debug_assert!(region.size() >= BrowserMessageHeader::SIZE);
+            debug_assert!(!region.memory().is_null());
+            let buffer =
+                unsafe { slice::from_raw_parts(region.memory() as *const u8, region.size()) };
+            let header = {
+                let mut cursor = Cursor::new(&buffer[..BrowserMessageHeader::SIZE]);
+                BrowserMessageHeader::read(&mut cursor).unwrap_or_default()
+            };
+            if header.is_binary {
+                Self {
+                    context_id: header.context_id,
+                    request_id: header.request_id,
+                    is_success: true,
+                    error_code: NO_ERROR,
+                    payload: MessagePayload::Binary(Arc::new(SharedMemoryRegionBuffer::new(
+                        Some(region),
+                        BrowserMessageHeader::SIZE,
+                    ))),
+                }
+            } else {
+                let mut cursor = Cursor::new(&buffer[BrowserMessageHeader::SIZE..]);
+                Self {
+                    context_id: header.context_id,
+                    request_id: header.request_id,
+                    is_success: true,
+                    error_code: NO_ERROR,
+                    payload: MessagePayload::read_string(&mut cursor).unwrap_or_default(),
+                }
+            }
+        } else {
+            Default::default()
+        }
+    }
+}
+
+#[derive(Clone, Default)]
+pub struct RenderMessage {
+    pub context_id: i32,
+    pub request_id: i32,
+    pub is_persistent: bool,
+    pub payload: MessagePayload,
+}
+
+impl From<Option<ProcessMessage>> for RenderMessage {
+    fn from(message: Option<ProcessMessage>) -> Self {
+        let Some(message) = message else {
+            return Default::default();
+        };
+
+        if let Some(args) = message.argument_list() {
+            debug_assert_eq!(args.size(), 4);
+            let context_id = args.int(CONTEXT_ID);
+            let request_id = args.int(REQUEST_ID);
+            let is_persistent = args.bool(IS_PERSISTENT) != 0;
+
+            match args.get_type(RENDERER_PAYLOAD) {
+                ValueType::STRING => Self {
+                    context_id,
+                    request_id,
+                    is_persistent,
+                    payload: MessagePayload::String(CefStringUtf8::from(&CefString::from(
+                        &args.string(RENDERER_PAYLOAD),
+                    ))),
+                },
+                ValueType::BINARY => Self {
+                    context_id,
+                    request_id,
+                    is_persistent,
+                    payload: MessagePayload::Binary(Arc::new(BinaryValueBuffer::new(
+                        Some(message),
+                        args.binary(RENDERER_PAYLOAD),
+                    ))),
+                },
+                payload_type => {
+                    debug_assert_eq!(payload_type, ValueType::NULL);
+                    Self {
+                        context_id,
+                        request_id,
+                        is_persistent,
+                        payload: MessagePayload::Binary(Arc::new(EmptyBinaryBuffer)),
+                    }
+                }
+            }
+        } else if let Some(region) = message
+            .shared_memory_region()
+            .filter(|region| region.is_valid() != 0)
+        {
+            debug_assert!(region.size() >= RendererMessageHeader::<true>::SIZE);
+            debug_assert!(!region.memory().is_null());
+            let buffer =
+                unsafe { slice::from_raw_parts(region.memory() as *const u8, region.size()) };
+            let header = {
+                let mut cursor = Cursor::new(&buffer[..RendererMessageHeader::<true>::SIZE]);
+                RendererMessageHeader::<true>::read(&mut cursor).unwrap_or_default()
+            };
+            if header.is_binary {
+                Self {
+                    context_id: header.context_id,
+                    request_id: header.request_id,
+                    is_persistent: header.is_persistent,
+                    payload: MessagePayload::Binary(Arc::new(SharedMemoryRegionBuffer::new(
+                        Some(region),
+                        RendererMessageHeader::<true>::SIZE,
+                    ))),
+                }
+            } else {
+                let mut cursor = Cursor::new(&buffer[RendererMessageHeader::<true>::SIZE..]);
+                Self {
+                    context_id: header.context_id,
+                    request_id: header.request_id,
+                    is_persistent: header.is_persistent,
+                    payload: MessagePayload::read_string(&mut cursor).unwrap_or_default(),
+                }
+            }
+        } else {
+            Default::default()
+        }
+    }
+}
+
+#[cfg(not(feature = "sandbox"))]
+wrap_v8_array_buffer_release_callback! {
+    pub struct BinaryValueArrayBufferReleaseCallback {
+        value: MessagePayload,
+    }
+
+    impl V8ArrayBufferReleaseCallback {
+        fn release_buffer(&self, _buffer: *mut u8) {}
+    }
+}
+
+trait MessageHeader: Sized {
+    const SIZE: usize;
+
+    fn new(context_id: i32, request_id: i32, is_binary: bool) -> Self;
+    fn read<R: Read>(f: &mut R) -> io::Result<Self>;
+    fn write<W: Write>(&self, f: &mut W) -> io::Result<()>;
+}
+
+#[derive(Clone, Default)]
+struct BrowserMessageHeader {
+    context_id: i32,
+    request_id: i32,
+    is_binary: bool,
+}
+
+impl MessageHeader for BrowserMessageHeader {
+    const SIZE: usize = mem::size_of::<i32>() * 2 + 1;
+
+    fn new(context_id: i32, request_id: i32, is_binary: bool) -> Self {
+        Self {
+            context_id,
+            request_id,
+            is_binary,
+        }
+    }
+
+    fn read<R: Read>(f: &mut R) -> io::Result<Self> {
+        let mut data = [0_u8; mem::size_of::<i32>()];
+        f.read_exact(&mut data)?;
+        let context_id = i32::from_ne_bytes(data);
+        f.read_exact(&mut data)?;
+        let request_id = i32::from_ne_bytes(data);
+        let mut flags = [0_u8];
+        f.read_exact(&mut flags)?;
+        let is_binary = flags[0] != 0;
+
+        Ok(Self {
+            context_id,
+            request_id,
+            is_binary,
+        })
+    }
+
+    fn write<W: Write>(&self, f: &mut W) -> io::Result<()> {
+        f.write_all(&self.context_id.to_ne_bytes())?;
+        f.write_all(&self.request_id.to_ne_bytes())?;
+        f.write_all(&[self.is_binary.into()])
+    }
+}
+
+#[derive(Clone, Default)]
+struct RendererMessageHeader<const DEFAULT_PERSISTENT: bool> {
+    context_id: i32,
+    request_id: i32,
+    is_persistent: bool,
+    is_binary: bool,
+}
+
+impl<const DEFAULT_PERSISTENT: bool> MessageHeader for RendererMessageHeader<DEFAULT_PERSISTENT> {
+    const SIZE: usize = mem::size_of::<i32>() * 2 + 2;
+
+    fn new(context_id: i32, request_id: i32, is_binary: bool) -> Self {
+        Self {
+            context_id,
+            request_id,
+            is_persistent: DEFAULT_PERSISTENT,
+            is_binary,
+        }
+    }
+
+    fn read<R: Read>(f: &mut R) -> io::Result<Self> {
+        let mut data = [0_u8; mem::size_of::<i32>()];
+        f.read_exact(&mut data)?;
+        let context_id = i32::from_ne_bytes(data);
+        f.read_exact(&mut data)?;
+        let request_id = i32::from_ne_bytes(data);
+        let mut flags = [0_u8; 2];
+        f.read_exact(&mut flags)?;
+        let is_persistent = flags[0] != 0;
+        let is_binary = flags[1] != 0;
+
+        Ok(Self {
+            context_id,
+            request_id,
+            is_persistent,
+            is_binary,
+        })
+    }
+
+    fn write<W: Write>(&self, f: &mut W) -> io::Result<()> {
+        f.write_all(&self.context_id.to_ne_bytes())?;
+        f.write_all(&self.request_id.to_ne_bytes())?;
+        f.write_all(&[self.is_persistent.into()])?;
+        f.write_all(&[self.is_binary.into()])
+    }
+}
+
+fn build_browser_list_message(
+    name: &str,
+    context_id: i32,
+    request_id: i32,
+    payload: MessagePayload,
+) -> Option<ProcessMessage> {
+    let message = process_message_create(Some(&CefString::from(name)))?;
+    let args = message.argument_list()?;
+    args.set_int(CONTEXT_ID, context_id);
+    args.set_int(REQUEST_ID, request_id);
+    args.set_bool(IS_SUCCESS, 1);
+
+    match payload {
+        MessagePayload::Empty => args.set_null(BROWSER_PAYLOAD),
+        MessagePayload::String(value) => {
+            args.set_string(BROWSER_PAYLOAD, Some(&CefString::from(&value)))
+        }
+        MessagePayload::Binary(value) => args.set_binary(
+            BROWSER_PAYLOAD,
+            binary_value_create(Some(value.data())).as_mut(),
+        ),
+    };
+
+    Some(message)
+}
+
+fn build_render_list_message(
+    name: &str,
+    context_id: i32,
+    request_id: i32,
+    payload: MessagePayload,
+    is_persistent: bool,
+) -> Option<ProcessMessage> {
+    let message = process_message_create(Some(&CefString::from(name)))?;
+    let args = message.argument_list()?;
+    args.set_int(CONTEXT_ID, context_id);
+    args.set_int(REQUEST_ID, request_id);
+
+    match payload {
+        MessagePayload::Empty => args.set_null(RENDERER_PAYLOAD),
+        MessagePayload::String(value) => {
+            args.set_string(RENDERER_PAYLOAD, Some(&CefString::from(&value)))
+        }
+        MessagePayload::Binary(value) => args.set_binary(
+            RENDERER_PAYLOAD,
+            binary_value_create(Some(value.data())).as_mut(),
+        ),
+    };
+
+    args.set_bool(IS_PERSISTENT, is_persistent.into());
+
+    Some(message)
+}
+
+struct MessagePayloadBuilder {
+    pub name: String,
+    pub payload: MessagePayload,
+}
+
+impl ProcessMessageBuilder for MessagePayloadBuilder {
+    fn build_browser_response(&self, context_id: i32, request_id: i32) -> Option<ProcessMessage> {
+        build_browser_list_message(&self.name, context_id, request_id, self.payload.clone())
+    }
+
+    fn build_renderer_message(
+        &self,
+        context_id: i32,
+        request_id: i32,
+        persistent: bool,
+    ) -> Option<ProcessMessage> {
+        build_render_list_message(
+            &self.name,
+            context_id,
+            request_id,
+            self.payload.clone(),
+            persistent,
+        )
+    }
+}
+
+enum SharedProcessMessageRouter<Header>
+where
+    Header: MessageHeader,
+{
+    SharedMemory {
+        builder: SharedProcessMessageBuilder,
+        is_binary: bool,
+        _phantom: PhantomData<Header>,
+    },
+    Payload(MessagePayloadBuilder),
+}
+
+impl<Header> SharedProcessMessageRouter<Header>
+where
+    Header: MessageHeader,
+{
+    fn new(name: &str, payload: MessagePayload) -> Self {
+        let message_size = Header::SIZE + payload.size();
+        let builder =
+            match shared_process_message_builder_create(Some(&CefString::from(name)), message_size)
+            {
+                Some(builder) if builder.is_valid() != 0 => builder,
+                _ => {
+                    return Self::Payload(MessagePayloadBuilder {
+                        name: name.to_owned(),
+                        payload,
+                    })
+                }
+            };
+
+        let buffer =
+            unsafe { slice::from_raw_parts_mut(builder.memory() as *mut u8, message_size) };
+        let mut cursor = Cursor::new(&mut buffer[Header::SIZE..]);
+        if payload.write(&mut cursor).is_err() {
+            return Self::Payload(MessagePayloadBuilder {
+                name: name.to_owned(),
+                payload,
+            });
+        }
+
+        Self::SharedMemory {
+            builder,
+            is_binary: matches!(payload, MessagePayload::Binary(_)),
+            _phantom: PhantomData,
+        }
+    }
+}
+
+impl<Header> ProcessMessageBuilder for SharedProcessMessageRouter<Header>
+where
+    Header: MessageHeader,
+{
+    fn build_browser_response(&self, context_id: i32, request_id: i32) -> Option<ProcessMessage> {
+        match self {
+            Self::SharedMemory {
+                builder, is_binary, ..
+            } => {
+                let buffer =
+                    unsafe { slice::from_raw_parts_mut(builder.memory() as *mut u8, Header::SIZE) };
+                let mut cursor = Cursor::new(buffer);
+                Header::new(context_id, request_id, *is_binary)
+                    .write(&mut cursor)
+                    .ok()?;
+
+                builder.build()
+            }
+            Self::Payload(builder) => builder.build_browser_response(context_id, request_id),
+        }
+    }
+
+    fn build_renderer_message(
+        &self,
+        context_id: i32,
+        request_id: i32,
+        persistent: bool,
+    ) -> Option<ProcessMessage> {
+        match self {
+            Self::SharedMemory {
+                builder, is_binary, ..
+            } => {
+                let buffer =
+                    unsafe { slice::from_raw_parts_mut(builder.memory() as *mut u8, Header::SIZE) };
+                let mut cursor = Cursor::new(buffer);
+                Header::new(context_id, request_id, *is_binary)
+                    .write(&mut cursor)
+                    .ok()?;
+
+                builder.build()
+            }
+            Self::Payload(builder) => {
+                builder.build_renderer_message(context_id, request_id, persistent)
+            }
+        }
+    }
+}
+
+pub struct EmptyBinaryBuffer;
+
+impl BinaryBuffer for EmptyBinaryBuffer {
+    fn data(&self) -> &[u8] {
+        &[]
+    }
+
+    fn data_mut(&mut self) -> &mut [u8] {
+        &mut []
+    }
+}
+
+pub struct BinaryValueBuffer {
+    _message: Option<ProcessMessage>,
+    value: Option<BinaryValue>,
+}
+
+impl BinaryValueBuffer {
+    pub fn new(message: Option<ProcessMessage>, value: Option<BinaryValue>) -> Self {
+        Self {
+            _message: message,
+            value,
+        }
+    }
+}
+
+impl BinaryBuffer for BinaryValueBuffer {
+    fn data(&self) -> &[u8] {
+        self.value.as_ref().map_or(&[], |v| unsafe {
+            slice::from_raw_parts(v.raw_data() as *const u8, v.size())
+        })
+    }
+
+    fn data_mut(&mut self) -> &mut [u8] {
+        self.value.as_mut().map_or(&mut [], |v| unsafe {
+            slice::from_raw_parts_mut(v.raw_data() as *mut u8, v.size())
+        })
+    }
+}
+
+struct SharedMemoryRegionBuffer {
+    region: Option<SharedMemoryRegion>,
+    offset: usize,
+}
+
+impl SharedMemoryRegionBuffer {
+    fn new(region: Option<SharedMemoryRegion>, offset: usize) -> Self {
+        Self { region, offset }
+    }
+
+    fn data(&self) -> *mut u8 {
+        self.region
+            .as_ref()
+            .map_or(std::ptr::null_mut(), |r| unsafe {
+                r.memory().add(self.offset) as *mut u8
+            })
+    }
+
+    fn size(&self) -> usize {
+        self.region
+            .as_ref()
+            .map_or(0, |r| r.size().saturating_sub(self.offset))
+    }
+}
+
+impl BinaryBuffer for SharedMemoryRegionBuffer {
+    fn data(&self) -> &[u8] {
+        let data = self.data();
+        let size = self.size();
+        if data.is_null() || size == 0 {
+            &[]
+        } else {
+            unsafe { slice::from_raw_parts(data as *const u8, size) }
+        }
+    }
+
+    fn data_mut(&mut self) -> &mut [u8] {
+        let data = self.data();
+        let size = self.size();
+        if data.is_null() || size == 0 {
+            &mut []
+        } else {
+            unsafe { slice::from_raw_parts_mut(data, size) }
+        }
+    }
+}
+
+pub fn create_browser_response_builder(
+    threshold: usize,
+    name: &str,
+    payload: MessagePayload,
+) -> Rc<dyn ProcessMessageBuilder> {
+    if payload.size() < threshold {
+        Rc::new(MessagePayloadBuilder {
+            name: name.to_string(),
+            payload,
+        })
+    } else {
+        Rc::new(SharedProcessMessageRouter::<BrowserMessageHeader>::new(
+            name, payload,
+        ))
+    }
+}
+
+pub fn build_renderer_message(
+    threshold: usize,
+    name: &str,
+    context_id: i32,
+    request_id: i32,
+    request: Option<&V8Value>,
+    persistent: bool,
+) -> Option<ProcessMessage> {
+    let payload = request
+        .map(|request| {
+            if request.is_string() != 0 {
+                MessagePayload::from(&CefString::from(&request.string_value()))
+            } else {
+                MessagePayload::from(Some(request))
+            }
+        })
+        .unwrap_or(MessagePayload::Empty);
+
+    let builder: Box<dyn ProcessMessageBuilder> = if payload.size() < threshold {
+        Box::new(MessagePayloadBuilder {
+            name: name.to_string(),
+            payload,
+        })
+    } else if persistent {
+        Box::new(SharedProcessMessageRouter::<RendererMessageHeader<true>>::new(name, payload))
+    } else {
+        Box::new(SharedProcessMessageRouter::<RendererMessageHeader<false>>::new(name, payload))
+    };
+
+    builder.build_renderer_message(context_id, request_id, persistent)
+}

cef/src/wrapper/mod.rs

@@ -0,0 +1,8 @@
+pub mod browser_info_map;
+pub mod byte_read_handler;
+pub mod message_router;
+pub mod resource_manager;
+pub mod stream_resource_handler;
+pub mod zip_archive;
+
+mod message_router_utils;

cef/src/wrapper/stream_resource_handler.rs

@@ -0,0 +1,121 @@
+//! Implementation of the ResourceHandler class for reading from a Stream.
+use crate::*;
+
+wrap_resource_handler! {
+    pub struct StreamResourceHandler {
+        status_code: i32,
+        status_text: String,
+        mime_type: String,
+        header_map: Option<CefStringMultimap>,
+        stream: Option<StreamReader>,
+    }
+
+    impl ResourceHandler {
+        fn open(
+            &self,
+            _request: Option<&mut Request>,
+            handle_request: Option<&mut i32>,
+            _callback: Option<&mut Callback>,
+        ) -> i32 {
+            debug_assert_eq!(
+                currently_on(ThreadId::UI),
+                0,
+                "open must not be called on the UI thread"
+            );
+            debug_assert_eq!(
+                currently_on(ThreadId::IO),
+                0,
+                "open must not be called on the IO thread"
+            );
+
+            // Continue the request immediately.
+            if let Some(handle_request) = handle_request {
+                *handle_request = 1;
+            }
+
+            1
+        }
+
+        fn response_headers(
+            &self,
+            response: Option<&mut Response>,
+            response_length: Option<&mut i64>,
+            _redirect_url: Option<&mut CefString>,
+        ) {
+            debug_assert_ne!(
+                currently_on(ThreadId::IO),
+                0,
+                "response_headers must be called on the IO thread"
+            );
+
+            let Some(response) = response else {
+                return;
+            };
+
+            response.set_status(self.status_code);
+            response.set_status_text(Some(&CefString::from(self.status_text.as_str())));
+            response.set_mime_type(Some(&CefString::from(self.mime_type.as_str())));
+
+            if let Some(mut header_map) = self.header_map.clone() {
+                response.set_header_map(Some(&mut header_map));
+            }
+
+            if let Some(response_length) = response_length {
+                *response_length = if self.stream.is_some() { -1 } else { 0 };
+            }
+        }
+
+        #[allow(clippy::not_unsafe_ptr_arg_deref)]
+        fn read(
+            &self,
+            data_out: *mut u8,
+            bytes_to_read: i32,
+            bytes_read: Option<&mut i32>,
+            _callback: Option<&mut ResourceReadCallback>,
+        ) -> i32 {
+            debug_assert_eq!(
+                currently_on(ThreadId::UI),
+                0,
+                "read must not be called on the UI thread"
+            );
+            debug_assert_eq!(
+                currently_on(ThreadId::IO),
+                0,
+                "read must not be called on the IO thread"
+            );
+            if bytes_to_read < 1 {
+                return 0;
+            }
+            let Some(bytes_read) = bytes_read else {
+                return 0;
+            };
+            let Some(stream) = &self.stream else {
+                *bytes_read = 0;
+                return 1;
+            };
+
+            // Read until the buffer is full or until read() returns 0 to indicate no more data.
+            *bytes_read = 0;
+            loop {
+                let data_out = unsafe { data_out.add(*bytes_read as usize) };
+                let read = stream.read(data_out, 1, (bytes_to_read - *bytes_read) as usize);
+                *bytes_read += read as i32;
+                if read == 0 || *bytes_read >= bytes_to_read {
+                    break;
+                }
+            }
+
+            if *bytes_read > 0 {
+                1
+            } else {
+                0
+            }
+        }
+    }
+}
+
+impl StreamResourceHandler {
+    pub fn new_with_stream(mime_type: String, stream: StreamReader) -> ResourceHandler {
+        Self::new(200, "OK".to_string(), mime_type, None, Some(stream))
+    }
+}

cef/src/wrapper/zip_archive.rs

@@ -0,0 +1,131 @@
+use super::byte_read_handler::*;
+use crate::*;
+use std::{
+    collections::BTreeMap,
+    sync::{Arc, Mutex},
+};
+
+pub trait File: Send {
+    fn stream_reader(&self) -> Option<StreamReader>;
+}
+
+pub type FileMap = BTreeMap<String, Arc<Mutex<dyn File>>>;
+
+struct ZipFile {
+    data: Vec<u8>,
+}
+
+impl File for ZipFile {
+    fn stream_reader(&self) -> Option<StreamReader> {
+        let mut handler =
+            ByteReadHandler::new(Arc::new(Mutex::new(ByteStream::new(self.data.clone()))));
+        stream_reader_create_for_handler(Some(&mut handler))
+    }
+}
+
+#[derive(Default)]
+pub struct ZipArchive {
+    contents: Mutex<FileMap>,
+}
+
+impl ZipArchive {
+    pub fn load(
+        &self,
+        stream: &mut StreamReader,
+        password: &str,
+        overwrite_existing: bool,
+    ) -> usize {
+        let Ok(mut contents) = self.contents.lock() else {
+            return 0;
+        };
+        let Some(reader) = zip_reader_create(Some(stream)) else {
+            return 0;
+        };
+        let password = CefString::from(password);
+
+        let mut count = 0;
+        loop {
+            let size = reader.file_size();
+            if size <= 0 {
+                // Skip directories and empty files.
+                continue;
+            }
+            let size = size as usize;
+
+            if reader.open_file(Some(&password)) == 0 {
+                break;
+            }
+
+            let name = CefString::from(&reader.file_name())
+                .to_string()
+                .to_lowercase();
+
+            if contents.contains_key(&name) {
+                if overwrite_existing {
+                    contents.remove(&name);
+                } else {
+                    // Skip files that already exist.
+                    continue;
+                }
+            }
+
+            let mut data = Vec::with_capacity(size);
+            while data.len() < size && reader.eof() == 0 {
+                let mut chunk = vec![0; size - data.len()];
+                let read = reader.read_file(Some(&mut chunk));
+                if read <= 0 {
+                    break;
+                }
+                data.extend_from_slice(&chunk[..read as usize]);
+            }
+
+            debug_assert_eq!(data.len(), size);
+            reader.close_file();
+            count += 1;
+
+            // Add the file to the map.
+            contents.insert(name, Arc::new(Mutex::new(ZipFile { data })));
+
+            if reader.move_to_next_file() == 0 {
+                break;
+            }
+        }
+
+        count
+    }
+
+    pub fn clear(&self) {
+        let Ok(mut contents) = self.contents.lock() else {
+            return;
+        };
+        contents.clear();
+    }
+
+    pub fn file_count(&self) -> usize {
+        let Ok(contents) = self.contents.lock() else {
+            return 0;
+        };
+        contents.len()
+    }
+
+    pub fn file(&self, name: &str) -> Option<Arc<Mutex<dyn File>>> {
+        let Ok(contents) = self.contents.lock() else {
+            return None;
+        };
+        contents.get(name).cloned()
+    }
+
+    pub fn remove_file(&self, name: &str) -> bool {
+        let Ok(mut contents) = self.contents.lock() else {
+            return false;
+        };
+        contents.remove(name).is_some()
+    }
+
+    pub fn files(&self) -> FileMap {
+        let Ok(contents) = self.contents.lock() else {
+            return Default::default();
+        };
+        contents.clone()
+    }
+}

download-cef/src/lib.rs

@@ -357,7 +357,7 @@ impl CefVersion {
     where
         P: AsRef<Path>,
     {
-        let mut result = self.download_archive_from(&url, &location, show_progress);
+        let mut result = self.download_archive_from(url, &location, show_progress);
 
         let mut retry = 0;
         while let Err(Error::Io(_)) = &result {
@@ -368,7 +368,7 @@ impl CefVersion {
             retry += 1;
             thread::sleep(retry_delay * retry);
 
-            result = self.download_archive_from(&url, &location, show_progress);
+            result = self.download_archive_from(url, &location, show_progress);
         }
 
         result
@@ -459,7 +459,7 @@ where
         println!("Downloading CEF archive for {target}...");
     }
 
-    let index = CefIndex::download_from(&url)?;
+    let index = CefIndex::download_from(url)?;
     let platform = index.platform(target)?;
     let version = platform.version(cef_version)?;
 

examples/cefsimple/Cargo.toml

@@ -3,27 +3,55 @@ name = "cefsimple"
 edition = "2024"
 publish = false
 
+[lib]
+crate-type = ["cdylib"]
+
 [[bin]]
 name = "cefsimple"
 
 [[bin]]
 name = "cefsimple_helper"
-path = "src/mac/helper.rs"
-
-[[bin]]
-name = "bundle_cefsimple"
-path = "src/mac/bundle_cefsimple.rs"
 
 [features]
-default = ["sandbox"]
-sandbox = ["cef/sandbox"]
+default = [
+    "sandbox",
+]
+sandbox = [
+    "cef/sandbox",
+]
+linux-x11 = [
+    "x11-dl",
+]
+
+[package.metadata.cef.bundle]
+helper_name = "cefsimple_helper"
+resources_path = "resources"
 
 [dependencies]
-cef.workspace = true
-cef-dll-sys.workspace = true
+cef = { workspace = true, features = [
+    "build-util",
+] }
 
 [target.'cfg(target_os = "macos")'.dependencies]
-plist.workspace = true
-serde.workspace = true
 objc2.workspace = true
-objc2-app-kit = { workspace = true, features = ["NSApplication", "NSResponder"] }
+objc2-foundation.workspace = true
+objc2-app-kit = { workspace = true, features = [
+    "NSApplication",
+    "NSEvent",
+    "NSResponder",
+    "NSUserInterfaceValidation",
+    "NSView",
+    "NSWindow",
+] }
+
+[target.'cfg(target_os = "windows")'.dependencies]
+windows-sys = { workspace = true, features = [
+    "Win32_Foundation",
+    "Win32_UI_WindowsAndMessaging",
+] }
+
+[target.'cfg(target_os = "windows")'.build-dependencies]
+winres.workspace = true
+
+[target.'cfg(target_os = "linux")'.dependencies]
+x11-dl = { workspace = true, optional = true }

examples/cefsimple/build.rs

@@ -0,0 +1,14 @@
+#[cfg(target_os = "windows")]
+include!("src/shared/resources.rs");
+
+#[cfg(target_os = "windows")]
+fn main() {
+    winres::WindowsResource::new()
+        .set_icon_with_id("resources/win/cefsimple.ico", &IDI_CEFSIMPLE.to_string())
+        .set_icon_with_id("resources/win/small.ico", &IDI_SMALL.to_string())
+        .compile()
+        .unwrap();
+}
+
+#[cfg(not(target_os = "windows"))]
+fn main() {}

examples/cefsimple/resources/mac/English.lproj/InfoPlist.strings

@@ -0,0 +1,3 @@
+/* Localized versions of Info.plist keys */
+
+NSHumanReadableCopyright = "© Chromium Embedded Framework Authors, 2013";

examples/cefsimple/resources/mac/English.lproj/MainMenu.xib

@@ -0,0 +1,330 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<document type="com.apple.InterfaceBuilder3.Cocoa.XIB" version="3.0" toolsVersion="10117" systemVersion="16B2657" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none">
+    <dependencies>
+        <deployment version="1090" identifier="macosx"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="10117"/>
+    </dependencies>
+    <objects>
+        <customObject id="-2" userLabel="File's Owner" customClass="NSApplication"/>
+        <customObject id="-1" userLabel="First Responder" customClass="FirstResponder"/>
+        <customObject id="-3" userLabel="Application"/>
+        <menu title="AMainMenu" systemMenu="main" id="29" userLabel="MainMenu">
+            <items>
+                <menuItem title="cefsimple" id="56">
+                    <menu key="submenu" title="TestShell" systemMenu="apple" id="57">
+                        <items>
+                            <menuItem title="About cefsimple" id="58">
+                                <modifierMask key="keyEquivalentModifierMask"/>
+                                <connections>
+                                    <action selector="orderFrontStandardAboutPanel:" target="-2" id="142"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem isSeparatorItem="YES" id="236">
+                                <modifierMask key="keyEquivalentModifierMask" command="YES"/>
+                            </menuItem>
+                            <menuItem title="Preferences…" keyEquivalent="," id="129" userLabel="121"/>
+                            <menuItem isSeparatorItem="YES" id="143">
+                                <modifierMask key="keyEquivalentModifierMask" command="YES"/>
+                            </menuItem>
+                            <menuItem title="Services" id="131">
+                                <menu key="submenu" title="Services" systemMenu="services" id="130"/>
+                            </menuItem>
+                            <menuItem isSeparatorItem="YES" id="144">
+                                <modifierMask key="keyEquivalentModifierMask" command="YES"/>
+                            </menuItem>
+                            <menuItem title="Hide cefsimple" keyEquivalent="h" id="134">
+                                <connections>
+                                    <action selector="hide:" target="-1" id="367"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem title="Hide Others" keyEquivalent="h" id="145">
+                                <modifierMask key="keyEquivalentModifierMask" option="YES" command="YES"/>
+                                <connections>
+                                    <action selector="hideOtherApplications:" target="-1" id="368"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem title="Show All" id="150">
+                                <connections>
+                                    <action selector="unhideAllApplications:" target="-1" id="370"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem isSeparatorItem="YES" id="149">
+                                <modifierMask key="keyEquivalentModifierMask" command="YES"/>
+                            </menuItem>
+                            <menuItem title="Quit cefsimple" keyEquivalent="q" id="136" userLabel="1111">
+                                <connections>
+                                    <action selector="terminate:" target="-1" id="369"/>
+                                </connections>
+                            </menuItem>
+                        </items>
+                    </menu>
+                </menuItem>
+                <menuItem title="File" id="83">
+                    <menu key="submenu" title="File" id="81">
+                        <items>
+                            <menuItem title="New" keyEquivalent="n" id="82" userLabel="9">
+                                <connections>
+                                    <action selector="newDocument:" target="-1" id="373"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem title="Open…" keyEquivalent="o" id="72">
+                                <connections>
+                                    <action selector="openDocument:" target="-1" id="374"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem title="Open Recent" id="124">
+                                <menu key="submenu" title="Open Recent" systemMenu="recentDocuments" id="125">
+                                    <items>
+                                        <menuItem title="Clear Menu" id="126">
+                                            <connections>
+                                                <action selector="clearRecentDocuments:" target="-1" id="127"/>
+                                            </connections>
+                                        </menuItem>
+                                    </items>
+                                </menu>
+                            </menuItem>
+                            <menuItem isSeparatorItem="YES" id="79" userLabel="7">
+                                <modifierMask key="keyEquivalentModifierMask" command="YES"/>
+                            </menuItem>
+                            <menuItem title="Close" keyEquivalent="w" id="73" userLabel="1">
+                                <connections>
+                                    <action selector="performClose:" target="-1" id="193"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem title="Save" keyEquivalent="s" id="75" userLabel="3">
+                                <connections>
+                                    <action selector="saveDocument:" target="-1" id="362"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem title="Save As…" keyEquivalent="S" id="80" userLabel="8">
+                                <modifierMask key="keyEquivalentModifierMask" shift="YES" command="YES"/>
+                                <connections>
+                                    <action selector="saveDocumentAs:" target="-1" id="363"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem title="Revert to Saved" id="112" userLabel="10">
+                                <modifierMask key="keyEquivalentModifierMask"/>
+                                <connections>
+                                    <action selector="revertDocumentToSaved:" target="-1" id="364"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem isSeparatorItem="YES" id="74" userLabel="2">
+                                <modifierMask key="keyEquivalentModifierMask" command="YES"/>
+                            </menuItem>
+                            <menuItem title="Page Setup..." keyEquivalent="P" id="77" userLabel="5">
+                                <modifierMask key="keyEquivalentModifierMask" shift="YES" command="YES"/>
+                                <connections>
+                                    <action selector="runPageLayout:" target="-1" id="87"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem title="Print…" keyEquivalent="p" id="78" userLabel="6">
+                                <connections>
+                                    <action selector="print:" target="-1" id="86"/>
+                                </connections>
+                            </menuItem>
+                        </items>
+                    </menu>
+                </menuItem>
+                <menuItem title="Edit" id="217">
+                    <menu key="submenu" title="Edit" id="205">
+                        <items>
+                            <menuItem title="Undo" keyEquivalent="z" id="207">
+                                <connections>
+                                    <action selector="undo:" target="-1" id="223"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem title="Redo" keyEquivalent="Z" id="215">
+                                <modifierMask key="keyEquivalentModifierMask" shift="YES" command="YES"/>
+                                <connections>
+                                    <action selector="redo:" target="-1" id="231"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem isSeparatorItem="YES" id="206">
+                                <modifierMask key="keyEquivalentModifierMask" command="YES"/>
+                            </menuItem>
+                            <menuItem title="Cut" keyEquivalent="x" id="199">
+                                <connections>
+                                    <action selector="cut:" target="-1" id="228"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem title="Copy" keyEquivalent="c" id="197">
+                                <connections>
+                                    <action selector="copy:" target="-1" id="224"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem title="Paste" keyEquivalent="v" id="203">
+                                <connections>
+                                    <action selector="paste:" target="-1" id="226"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem title="Delete" id="202">
+                                <connections>
+                                    <action selector="delete:" target="-1" id="235"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem title="Select All" keyEquivalent="a" id="198">
+                                <connections>
+                                    <action selector="selectAll:" target="-1" id="232"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem isSeparatorItem="YES" id="214">
+                                <modifierMask key="keyEquivalentModifierMask" command="YES"/>
+                            </menuItem>
+                            <menuItem title="Find" id="218">
+                                <menu key="submenu" title="Find" id="220">
+                                    <items>
+                                        <menuItem title="Find…" tag="37000" keyEquivalent="f" id="209">
+                                            <connections>
+                                                <action selector="commandDispatch:" target="-1" id="241"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Find Next" tag="2" keyEquivalent="g" id="208"/>
+                                        <menuItem title="Find Previous" tag="3" keyEquivalent="G" id="213">
+                                            <modifierMask key="keyEquivalentModifierMask" shift="YES" command="YES"/>
+                                        </menuItem>
+                                        <menuItem title="Use Selection for Find" tag="7" keyEquivalent="e" id="221"/>
+                                        <menuItem title="Jump to Selection" keyEquivalent="j" id="210">
+                                            <connections>
+                                                <action selector="centerSelectionInVisibleArea:" target="-1" id="245"/>
+                                            </connections>
+                                        </menuItem>
+                                    </items>
+                                </menu>
+                            </menuItem>
+                            <menuItem title="Spelling and Grammar" id="216">
+                                <menu key="submenu" title="Spelling and Grammar" id="200">
+                                    <items>
+                                        <menuItem title="Show Spelling…" keyEquivalent=":" id="204">
+                                            <connections>
+                                                <action selector="showGuessPanel:" target="-1" id="230"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Check Spelling" keyEquivalent=";" id="201">
+                                            <connections>
+                                                <action selector="checkSpelling:" target="-1" id="225"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Check Spelling While Typing" id="219">
+                                            <connections>
+                                                <action selector="toggleContinuousSpellChecking:" target="-1" id="222"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Check Grammar With Spelling" id="346">
+                                            <connections>
+                                                <action selector="toggleGrammarChecking:" target="-1" id="347"/>
+                                            </connections>
+                                        </menuItem>
+                                    </items>
+                                </menu>
+                            </menuItem>
+                            <menuItem title="Substitutions" id="348">
+                                <menu key="submenu" title="Substitutions" id="349">
+                                    <items>
+                                        <menuItem title="Smart Copy/Paste" tag="1" keyEquivalent="f" id="350">
+                                            <connections>
+                                                <action selector="toggleSmartInsertDelete:" target="-1" id="355"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Smart Quotes" tag="2" keyEquivalent="g" id="351">
+                                            <connections>
+                                                <action selector="toggleAutomaticQuoteSubstitution:" target="-1" id="356"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Smart Links" tag="3" keyEquivalent="G" id="354">
+                                            <modifierMask key="keyEquivalentModifierMask" shift="YES" command="YES"/>
+                                            <connections>
+                                                <action selector="toggleAutomaticLinkDetection:" target="-1" id="357"/>
+                                            </connections>
+                                        </menuItem>
+                                    </items>
+                                </menu>
+                            </menuItem>
+                            <menuItem title="Speech" id="211">
+                                <menu key="submenu" title="Speech" id="212">
+                                    <items>
+                                        <menuItem title="Start Speaking" id="196">
+                                            <connections>
+                                                <action selector="startSpeaking:" target="-1" id="233"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem title="Stop Speaking" id="195">
+                                            <connections>
+                                                <action selector="stopSpeaking:" target="-1" id="227"/>
+                                            </connections>
+                                        </menuItem>
+                                    </items>
+                                </menu>
+                            </menuItem>
+                        </items>
+                    </menu>
+                </menuItem>
+                <menuItem title="Format" id="299">
+                    <menu key="submenu" title="Format" id="300">
+                        <items>
+                            <menuItem title="Show Fonts" keyEquivalent="t" id="344"/>
+                            <menuItem title="Show Colors" keyEquivalent="C" id="345">
+                                <modifierMask key="keyEquivalentModifierMask" shift="YES" command="YES"/>
+                                <connections>
+                                    <action selector="orderFrontColorPanel:" target="-1" id="361"/>
+                                </connections>
+                            </menuItem>
+                        </items>
+                    </menu>
+                </menuItem>
+                <menuItem title="View" id="295">
+                    <menu key="submenu" title="View" id="296">
+                        <items>
+                            <menuItem title="Show Toolbar" keyEquivalent="t" id="297">
+                                <modifierMask key="keyEquivalentModifierMask" option="YES" command="YES"/>
+                                <connections>
+                                    <action selector="toggleToolbarShown:" target="-1" id="366"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem title="Customize Toolbar…" id="298">
+                                <connections>
+                                    <action selector="runToolbarCustomizationPalette:" target="-1" id="365"/>
+                                </connections>
+                            </menuItem>
+                        </items>
+                    </menu>
+                </menuItem>
+                <menuItem title="Window" id="19">
+                    <menu key="submenu" title="Window" systemMenu="window" id="24">
+                        <items>
+                            <menuItem title="Minimize" keyEquivalent="m" id="23">
+                                <connections>
+                                    <action selector="performMiniaturize:" target="-1" id="37"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem title="Zoom" id="239">
+                                <connections>
+                                    <action selector="performZoom:" target="-1" id="240"/>
+                                </connections>
+                            </menuItem>
+                            <menuItem isSeparatorItem="YES" id="92">
+                                <modifierMask key="keyEquivalentModifierMask" command="YES"/>
+                            </menuItem>
+                            <menuItem title="Bring All to Front" id="5">
+                                <connections>
+                                    <action selector="arrangeInFront:" target="-1" id="39"/>
+                                </connections>
+                            </menuItem>
+                        </items>
+                    </menu>
+                </menuItem>
+                <menuItem title="Help" id="103" userLabel="1">
+                    <menu key="submenu" title="Help" id="106" userLabel="2">
+                        <items>
+                            <menuItem title="cefsimple Help" keyEquivalent="?" id="111">
+                                <connections>
+                                    <action selector="showHelp:" target="-1" id="360"/>
+                                </connections>
+                            </menuItem>
+                        </items>
+                    </menu>
+                </menuItem>
+            </items>
+        </menu>
+        <userDefaultsController representsSharedInstance="YES" id="389"/>
+    </objects>
+</document>

examples/cefsimple/src/lib.rs

@@ -0,0 +1,4 @@
+#[cfg(all(target_os = "windows", feature = "sandbox"))]
+pub mod shared;
+#[cfg(all(target_os = "windows", feature = "sandbox"))]
+mod win;

examples/cefsimple/src/mac/bundle_cefsimple.rs

@@ -1,182 +0,0 @@
-#[cfg(target_os = "macos")]
-mod mac {
-    use serde::Serialize;
-    use std::collections::HashMap;
-    use std::fs;
-    use std::path::{Path, PathBuf};
-    use std::process::{Command, Stdio};
-
-    #[derive(Serialize)]
-    struct InfoPlist {
-        #[serde(rename = "CFBundleDevelopmentRegion")]
-        cf_bundle_development_region: String,
-        #[serde(rename = "CFBundleDisplayName")]
-        cf_bundle_display_name: String,
-        #[serde(rename = "CFBundleExecutable")]
-        cf_bundle_executable: String,
-        #[serde(rename = "CFBundleIdentifier")]
-        cf_bundle_identifier: String,
-        #[serde(rename = "CFBundleInfoDictionaryVersion")]
-        cf_bundle_info_dictionary_version: String,
-        #[serde(rename = "CFBundleName")]
-        cf_bundle_name: String,
-        #[serde(rename = "CFBundlePackageType")]
-        cf_bundle_package_type: String,
-        #[serde(rename = "CFBundleSignature")]
-        cf_bundle_signature: String,
-        #[serde(rename = "CFBundleVersion")]
-        cf_bundle_version: String,
-        #[serde(rename = "CFBundleShortVersionString")]
-        cf_bundle_short_version_string: String,
-        #[serde(rename = "LSEnvironment")]
-        ls_environment: HashMap<String, String>,
-        #[serde(rename = "LSFileQuarantineEnabled")]
-        ls_file_quarantine_enabled: bool,
-        #[serde(rename = "LSMinimumSystemVersion")]
-        ls_minimum_system_version: String,
-        #[serde(rename = "LSUIElement")]
-        ls_ui_element: Option<String>,
-        #[serde(rename = "NSBluetoothAlwaysUsageDescription")]
-        ns_bluetooth_always_usage_description: String,
-        #[serde(rename = "NSSupportsAutomaticGraphicsSwitching")]
-        ns_supports_automatic_graphics_switching: bool,
-        #[serde(rename = "NSWebBrowserPublicKeyCredentialUsageDescription")]
-        ns_web_browser_publickey_credential_usage_description: String,
-        #[serde(rename = "NSCameraUsageDescription")]
-        ns_camera_usage_description: String,
-        #[serde(rename = "NSMicrophoneUsageDescription")]
-        ns_microphone_usage_description: String,
-    }
-
-    const EXEC_PATH: &str = "Contents/MacOS";
-    const FRAMEWORKS_PATH: &str = "Contents/Frameworks";
-    const RESOURCES_PATH: &str = "Contents/Resources";
-    const FRAMEWORK: &str = "Chromium Embedded Framework.framework";
-    const HELPERS: &[&str] = &[
-        "cefsimple Helper (GPU)",
-        "cefsimple Helper (Renderer)",
-        "cefsimple Helper (Plugin)",
-        "cefsimple Helper (Alerts)",
-        "cefsimple Helper",
-    ];
-
-    fn create_app_layout(app_path: &Path) -> PathBuf {
-        [EXEC_PATH, RESOURCES_PATH, FRAMEWORKS_PATH]
-            .iter()
-            .for_each(|p| fs::create_dir_all(app_path.join(p)).unwrap());
-        app_path.join("Contents")
-    }
-
-    fn create_app(app_path: &Path, exec_name: &str, bin: &Path, is_helper: bool) -> PathBuf {
-        let app_path = app_path.join(exec_name).with_extension("app");
-        let contents_path = create_app_layout(&app_path);
-        create_info_plist(&contents_path, exec_name, is_helper).unwrap();
-        fs::copy(bin, app_path.join(EXEC_PATH).join(exec_name)).unwrap();
-        app_path
-    }
-
-    // See https://bitbucket.org/chromiumembedded/cef/wiki/GeneralUsage.md#markdown-header-macos
-    fn bundle(app_path: &Path) {
-        let example_path = PathBuf::from(app_path);
-        let main_app_path = create_app(
-            app_path,
-            "cefsimple",
-            &example_path.join("cefsimple"),
-            false,
-        );
-        let cef_path = cef_dll_sys::get_cef_dir().unwrap();
-        let to = main_app_path.join(FRAMEWORKS_PATH).join(FRAMEWORK);
-        if to.exists() {
-            fs::remove_dir_all(&to).unwrap();
-        }
-        copy_directory(&cef_path.join(FRAMEWORK), &to);
-        HELPERS.iter().for_each(|helper| {
-            create_app(
-                &main_app_path.join(FRAMEWORKS_PATH),
-                helper,
-                &example_path.join("cefsimple_helper"),
-                true,
-            );
-        });
-    }
-
-    fn create_info_plist(
-        contents_path: &Path,
-        exec_name: &str,
-        is_helper: bool,
-    ) -> Result<(), Box<dyn std::error::Error>> {
-        let info_plist = InfoPlist {
-            cf_bundle_development_region: "en".to_string(),
-            cf_bundle_display_name: exec_name.to_string(),
-            cf_bundle_executable: exec_name.to_string(),
-            cf_bundle_identifier: "org.cef-rs.cefsimple.helper".to_string(),
-            cf_bundle_info_dictionary_version: "6.0".to_string(),
-            cf_bundle_name: "cef-rs".to_string(),
-            cf_bundle_package_type: "APPL".to_string(),
-            cf_bundle_signature: "????".to_string(),
-            cf_bundle_version: "1.0.0".to_string(),
-            cf_bundle_short_version_string: "1.0".to_string(),
-            ls_environment: [("MallocNanoZone".to_string(), "0".to_string())]
-                .iter()
-                .cloned()
-                .collect(),
-            ls_file_quarantine_enabled: true,
-            ls_minimum_system_version: "11.0".to_string(),
-            ls_ui_element: if is_helper {
-                Some("1".to_string())
-            } else {
-                None
-            },
-            ns_bluetooth_always_usage_description: exec_name.to_string(),
-            ns_supports_automatic_graphics_switching: true,
-            ns_web_browser_publickey_credential_usage_description: exec_name.to_string(),
-            ns_camera_usage_description: exec_name.to_string(),
-            ns_microphone_usage_description: exec_name.to_string(),
-        };
-
-        plist::to_file_xml(contents_path.join("Info.plist"), &info_plist)?;
-        Ok(())
-    }
-
-    fn copy_directory(src: &Path, dst: &Path) {
-        fs::create_dir_all(dst).unwrap();
-        for entry in fs::read_dir(src).unwrap() {
-            let entry = entry.unwrap();
-            let dst_path = dst.join(entry.file_name());
-            if entry.file_type().unwrap().is_dir() {
-                copy_directory(&entry.path(), &dst_path);
-            } else {
-                fs::copy(entry.path(), &dst_path).unwrap();
-            }
-        }
-    }
-
-    fn run_command(args: &[&str]) -> Result<(), Box<dyn std::error::Error>> {
-        let status = Command::new("cargo")
-            .args(args)
-            .stdout(Stdio::inherit())
-            .stderr(Stdio::inherit())
-            .status()?;
-
-        if !status.success() {
-            std::process::exit(1);
-        }
-        Ok(())
-    }
-
-    pub fn main() -> Result<(), Box<dyn std::error::Error>> {
-        let app_path = PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("../../target/debug");
-        run_command(&["build", "--bin", "cefsimple"])?;
-        run_command(&["build", "--bin", "cefsimple_helper"])?;
-        bundle(&app_path);
-        Ok(())
-    }
-}
-
-#[cfg(target_os = "macos")]
-fn main() -> Result<(), Box<dyn std::error::Error>> {
-    mac::main()
-}
-
-#[cfg(not(target_os = "macos"))]
-fn main() {}

examples/cefsimple/src/mac/mod.rs

@@ -0,0 +1,243 @@
+use crate::shared::simple_handler::*;
+use cef::application_mac::{CefAppProtocol, CrAppControlProtocol, CrAppProtocol};
+use objc2::{
+    ClassType, DefinedClass, MainThreadMarker, MainThreadOnly, define_class, extern_methods,
+    msg_send,
+    rc::Retained,
+    runtime::{AnyObject, Bool, NSObject, NSObjectProtocol, ProtocolObject},
+    sel,
+};
+use objc2_app_kit::{
+    NSApp, NSApplication, NSApplicationDelegate, NSApplicationTerminateReply, NSEvent,
+    NSUserInterfaceValidations, NSValidatedUserInterfaceItem,
+};
+use objc2_foundation::{NSBundle, NSObjectNSThreadPerformAdditions, ns_string};
+use std::{cell::Cell, ptr};
+
+define_class! {
+    #[unsafe(super(NSObject))]
+    #[thread_kind = MainThreadOnly]
+    pub struct SimpleAppDelegate;
+
+    impl SimpleAppDelegate {
+        /// Create the application on the UI thread.
+        #[unsafe(method(createApplication:))]
+        unsafe fn create_application(&self, _object: Option<&AnyObject>) {
+            let app = NSApp(MainThreadMarker::new().expect("Not running on the main thread"));
+            assert!(app.isKindOfClass(SimpleApplication::class()));
+            assert!(
+                app.delegate()
+                    .unwrap()
+                    .isKindOfClass(SimpleAppDelegate::class())
+            );
+
+            let main_bundle = NSBundle::mainBundle();
+            let _: Bool = msg_send![&main_bundle,
+                loadNibNamed: ns_string!("MainMenu"),
+                owner: &*app,
+                topLevelObjects: ptr::null_mut::<*const AnyObject>()
+            ];
+        }
+    }
+
+    unsafe impl NSObjectProtocol for SimpleAppDelegate {}
+
+    unsafe impl NSApplicationDelegate for SimpleAppDelegate {
+        #[unsafe(method(applicationShouldTerminate:))]
+        unsafe fn application_should_terminate(&self, _sender: &NSApplication) -> NSApplicationTerminateReply {
+            NSApplicationTerminateReply::TerminateNow
+        }
+
+        /// Called when the user clicks the app dock icon while the application is
+        /// already running.
+        #[unsafe(method(applicationShouldHandleReopen:hasVisibleWindows:))]
+        unsafe fn application_should_handle_reopen(&self, _sender: &NSApplication, _has_visible_windows: Bool) -> Bool {
+            if let Some(handler) = SimpleHandler::instance() {
+                let mut handler = handler.lock().expect("Failed to lock SimpleHandler");
+                if !handler.is_closing() {
+                    handler.show_main_window();
+                }
+            }
+            Bool::NO
+        }
+
+        /// Requests that any state restoration archive be created with secure encoding
+        /// (macOS 12+ only). See https://crrev.com/c737387656 for details. This also
+        /// fixes an issue with macOS default behavior incorrectly restoring windows
+        /// after hard reset (holding down the power button).
+        #[unsafe(method(applicationSupportsSecureRestorableState:))]
+        unsafe fn application_supports_secure_restorable_state(&self, _sender: &NSApplication) -> Bool {
+            Bool::YES
+        }
+    }
+
+    unsafe impl NSUserInterfaceValidations for SimpleAppDelegate {
+        #[unsafe(method(validateUserInterfaceItem:))]
+        unsafe fn validate_user_interface_item(&self, item: &ProtocolObject<dyn NSValidatedUserInterfaceItem>) -> Bool {
+            const IDC_FIND: isize = 37000;
+
+            let tag = item.tag();
+            if tag == IDC_FIND {
+                Bool::YES
+            } else {
+                Bool::NO
+            }
+        }
+    }
+}
+
+impl SimpleAppDelegate {
+    fn new(mtm: MainThreadMarker) -> Retained<Self> {
+        let this = SimpleAppDelegate::alloc(mtm).set_ivars(());
+        unsafe { msg_send![super(this), init] }
+    }
+}
+
+/// Instance variables of `SimpleApplication`.
+#[derive(Default)]
+pub struct SimpleApplicationIvars {
+    handling_send_event: Cell<Bool>,
+}
+
+define_class!(
+    /// A `NSApplication` subclass that implements the required CEF protocols.
+    ///
+    /// This class provides the necessary `CefAppProtocol` conformance to
+    /// ensure that events are handled correctly by the Chromium framework on macOS.
+    #[unsafe(super(NSApplication))]
+    #[ivars = SimpleApplicationIvars]
+    pub struct SimpleApplication;
+
+    impl SimpleApplication {
+        #[unsafe(method(sendEvent:))]
+        unsafe fn send_event(&self, event: &NSEvent) {
+            let was_sending_event = self.is_handling_send_event();
+            if !was_sending_event {
+                self.set_handling_send_event(true);
+            }
+
+            let _: () = msg_send![super(self), sendEvent:event];
+
+            if !was_sending_event {
+                self.set_handling_send_event(false);
+            }
+        }
+
+        /// |-terminate:| is the entry point for orderly "quit" operations in Cocoa. This
+        /// includes the application menu's quit menu item and keyboard equivalent, the
+        /// application's dock icon menu's quit menu item, "quit" (not "force quit") in
+        /// the Activity Monitor, and quits triggered by user logout and system restart
+        /// and shutdown.
+        ///
+        /// The default |-terminate:| implementation ends the process by calling exit(),
+        /// and thus never leaves the main run loop. This is unsuitable for Chromium
+        /// since Chromium depends on leaving the main run loop to perform an orderly
+        /// shutdown. We support the normal |-terminate:| interface by overriding the
+        /// default implementation. Our implementation, which is very specific to the
+        /// needs of Chromium, works by asking the application delegate to terminate
+        /// using its |-tryToTerminateApplication:| method.
+        ///
+        /// |-tryToTerminateApplication:| differs from the standard
+        /// |-applicationShouldTerminate:| in that no special event loop is run in the
+        /// case that immediate termination is not possible (e.g., if dialog boxes
+        /// allowing the user to cancel have to be shown). Instead, this method tries to
+        /// close all browsers by calling CloseBrowser(false) via
+        /// ClientHandler::CloseAllBrowsers. Calling CloseBrowser will result in a call
+        /// to ClientHandler::DoClose and execution of |-performClose:| on the NSWindow.
+        /// DoClose sets a flag that is used to differentiate between new close events
+        /// (e.g., user clicked the window close button) and in-progress close events
+        /// (e.g., user approved the close window dialog). The NSWindowDelegate
+        /// |-windowShouldClose:| method checks this flag and either calls
+        /// CloseBrowser(false) in the case of a new close event or destructs the
+        /// NSWindow in the case of an in-progress close event.
+        /// ClientHandler::OnBeforeClose will be called after the CEF NSView hosted in
+        /// the NSWindow is dealloc'ed.
+        ///
+        /// After the final browser window has closed ClientHandler::OnBeforeClose will
+        /// begin actual tear-down of the application by calling CefQuitMessageLoop.
+        /// This ends the NSApplication event loop and execution then returns to the
+        /// main() function for cleanup before application termination.
+        ///
+        /// The standard |-applicationShouldTerminate:| is not supported, and code paths
+        /// leading to it must be redirected.
+        #[unsafe(method(terminate:))]
+        unsafe fn terminate(&self, _sender: &AnyObject) {
+            if let Some(handler) = SimpleHandler::instance() {
+                let mut handler = handler.lock().expect("Failed to lock SimpleHandler");
+                if !handler.is_closing() {
+                    handler.close_all_browsers(false);
+                }
+            }
+        }
+    }
+
+    unsafe impl CrAppControlProtocol for SimpleApplication {
+        #[unsafe(method(setHandlingSendEvent:))]
+        unsafe fn _set_handling_send_event(&self, handling_send_event: Bool) {
+            self.ivars().handling_send_event.set(handling_send_event);
+        }
+    }
+
+    unsafe impl CrAppProtocol for SimpleApplication {
+        #[unsafe(method(isHandlingSendEvent))]
+        unsafe fn _is_handling_send_event(&self) -> Bool {
+            self.ivars().handling_send_event.get()
+        }
+    }
+
+    unsafe impl CefAppProtocol for SimpleApplication {}
+);
+
+impl SimpleApplication {
+    extern_methods! {
+        #[unsafe(method(sharedApplication))]
+        fn shared_application() -> Retained<Self>;
+
+        #[unsafe(method(setHandlingSendEvent:))]
+        fn set_handling_send_event(&self, handling_send_event: bool);
+
+        #[unsafe(method(isHandlingSendEvent))]
+        fn is_handling_send_event(&self) -> bool;
+    }
+}
+
+pub fn setup_simple_application() {
+    // Initialize the SimpleApplication instance.
+    // SAFETY: mtm ensures that here is the main thread.
+    let _ = SimpleApplication::shared_application();
+
+    // If there was an invocation to NSApp prior to here,
+    // then the NSApp will not be a SimpleApplication.
+    // The following assertion ensures that this doesn't happen.
+    assert!(
+        NSApp(MainThreadMarker::new().expect("Not running on the main thread"))
+            .isKindOfClass(SimpleApplication::class())
+    );
+}
+
+pub fn setup_simple_app_delegate() -> Retained<SimpleAppDelegate> {
+    let mtm = MainThreadMarker::new().expect("Not running on the main thread");
+
+    // Create the application delegate.
+    let simple_delegate = SimpleAppDelegate::new(mtm);
+    let delegate_proto =
+        ProtocolObject::<dyn NSApplicationDelegate>::from_retained(simple_delegate.clone());
+    let app = NSApp(MainThreadMarker::new().expect("Not running on the main thread"));
+    assert!(app.isKindOfClass(SimpleApplication::class()));
+    app.setDelegate(Some(&delegate_proto));
+    assert!(
+        app.delegate()
+            .unwrap()
+            .isKindOfClass(SimpleAppDelegate::class())
+    );
+
+    unsafe {
+        simple_delegate.performSelectorOnMainThread_withObject_waitUntilDone(
+            sel!(createApplication:),
+            None,
+            false,
+        );
+    }
+
+    simple_delegate
+}

examples/cefsimple/src/main.rs

@@ -1,230 +1,27 @@
-use cef::{args::Args, rc::*, *};
-use std::sync::{Arc, Mutex};
+#![cfg_attr(
+    all(not(debug_assertions), not(feature = "sandbox"), target_os = "windows"),
+    windows_subsystem = "windows"
+)]
 
-wrap_app! {
-    struct DemoApp {
-        window: Arc<Mutex<Option<Window>>>,
-    }
-
-    impl App {
-        fn browser_process_handler(&self) -> Option<BrowserProcessHandler> {
-            Some(DemoBrowserProcessHandler::new(
-                self.window.clone(),
-            ))
-        }
-    }
-}
-
-wrap_browser_process_handler! {
-    struct DemoBrowserProcessHandler {
-        window: Arc<Mutex<Option<Window>>>,
-    }
-
-    impl BrowserProcessHandler {
-        // The real lifespan of cef starts from `on_context_initialized`, so all the cef objects should be manipulated after that.
-        fn on_context_initialized(&self) {
-            println!("cef context intiialized");
-            let mut client = DemoClient::new();
-            let url = CefString::from("https://www.google.com");
-
-            let browser_view = browser_view_create(
-                Some(&mut client),
-                Some(&url),
-                Some(&Default::default()),
-                Option::<&mut DictionaryValue>::None,
-                Option::<&mut RequestContext>::None,
-                Option::<&mut BrowserViewDelegate>::None,
-            )
-            .expect("Failed to create browser view");
-
-            let mut delegate = DemoWindowDelegate::new(browser_view);
-            if let Ok(mut window) = self.window.lock() {
-                *window = Some(
-                    window_create_top_level(Some(&mut delegate)).expect("Failed to create window"),
-                );
-            }
-        }
-    }
-}
-
-wrap_client! {
-    struct DemoClient;
-    impl Client {}
-}
-
-wrap_window_delegate! {
-    struct DemoWindowDelegate {
-        browser_view: BrowserView,
-    }
-
-    impl ViewDelegate {
-        fn on_child_view_changed(
-            &self,
-            _view: Option<&mut View>,
-            _added: ::std::os::raw::c_int,
-            _child: Option<&mut View>,
-        ) {
-            // view.as_panel().map(|x| x.as_window().map(|w| w.close()));
-        }
-    }
-
-    impl PanelDelegate {}
-
-    impl WindowDelegate {
-        fn on_window_created(&self, window: Option<&mut Window>) {
-            if let Some(window) = window {
-                let view = self.browser_view.clone();
-                window.add_child_view(Some(&mut (&view).into()));
-                window.show();
-            }
-        }
-
-        fn on_window_destroyed(&self, _window: Option<&mut Window>) {
-            quit_message_loop();
-        }
-
-        fn with_standard_window_buttons(&self, _window: Option<&mut Window>) -> ::std::os::raw::c_int {
-            1
-        }
-
-        fn can_resize(&self, _window: Option<&mut Window>) -> ::std::os::raw::c_int {
-            1
-        }
-
-        fn can_maximize(&self, _window: Option<&mut Window>) -> ::std::os::raw::c_int {
-            1
-        }
-
-        fn can_minimize(&self, _window: Option<&mut Window>) -> ::std::os::raw::c_int {
-            1
-        }
-
-        fn can_close(&self, _window: Option<&mut Window>) -> ::std::os::raw::c_int {
-            1
-        }
-    }
-}
-
-// FIXME: Rewrite this demo based on cef/tests/cefsimple
-fn main() {
-    #[cfg(target_os = "macos")]
-    let _loader = {
-        let loader = library_loader::LibraryLoader::new(&std::env::current_exe().unwrap(), false);
-        assert!(loader.load());
-        loader
-    };
+pub mod shared;
 
 #[cfg(target_os = "macos")]
-    {
-        use objc2::{
-            ClassType, MainThreadMarker, msg_send,
-            rc::Retained,
-            runtime::{AnyObject, NSObjectProtocol},
+mod mac;
+
+#[cfg(not(all(feature = "sandbox", target_os = "windows")))]
+fn main() -> Result<(), &'static str> {
+    let _library = shared::load_cef();
+
+    let args = cef::args::Args::new();
+    let Some(cmd_line) = args.as_cmd_line() else {
+        return Err("Failed to parse command line arguments");
     };
-        use objc2_app_kit::NSApp;
 
-        use application::SimpleApplication;
-
-        let mtm = MainThreadMarker::new().unwrap();
-
-        unsafe {
-            // Initialize the SimpleApplication instance.
-            // SAFETY: mtm ensures that here is the main thread.
-            let _: Retained<AnyObject> = msg_send![SimpleApplication::class(), sharedApplication];
+    shared::run_main(args.as_main_args(), &cmd_line, std::ptr::null_mut());
+    Ok(())
 }
 
-        // If there was an invocation to NSApp prior to here,
-        // then the NSApp will not be a SimpleApplication.
-        // The following assertion ensures that this doesn't happen.
-        assert!(NSApp(mtm).isKindOfClass(SimpleApplication::class()));
-    }
-
-    let _ = api_hash(sys::CEF_API_VERSION_LAST, 0);
-
-    let args = Args::new();
-    let cmd = args.as_cmd_line().unwrap();
-
-    let switch = CefString::from("type");
-    let is_browser_process = cmd.has_switch(Some(&switch)) != 1;
-
-    let window = Arc::new(Mutex::new(None));
-    let mut app = DemoApp::new(window.clone());
-
-    let ret = execute_process(
-        Some(args.as_main_args()),
-        Some(&mut app),
-        std::ptr::null_mut(),
-    );
-
-    if is_browser_process {
-        println!("launch browser process");
-        assert!(ret == -1, "cannot execute browser process");
-    } else {
-        let process_type = CefString::from(&cmd.switch_value(Some(&switch)));
-        println!("launch process {process_type}");
-        assert!(ret >= 0, "cannot execute non-browser process");
-        // non-browser process does not initialize cef
-        return;
-    }
-    let settings = Settings {
-        no_sandbox: !cfg!(feature = "sandbox") as _,
-        ..Default::default()
-    };
-    assert_eq!(
-        initialize(
-            Some(args.as_main_args()),
-            Some(&settings),
-            Some(&mut app),
-            std::ptr::null_mut(),
-        ),
-        1
-    );
-
-    run_message_loop();
-
-    let window = window.lock().expect("Failed to lock window");
-    let window = window.as_ref().expect("Window is None");
-    assert!(window.has_one_ref());
-
-    shutdown();
-}
-
-#[cfg(target_os = "macos")]
-mod application {
-    use std::cell::Cell;
-
-    use cef::application_mac::{CefAppProtocol, CrAppControlProtocol, CrAppProtocol};
-    use objc2::{DefinedClass, define_class, runtime::Bool};
-    use objc2_app_kit::NSApplication;
-
-    /// Instance variables of `SimpleApplication`.
-    pub struct SimpleApplicationIvars {
-        handling_send_event: Cell<Bool>,
-    }
-
-    define_class!(
-        /// A `NSApplication` subclass that implements the required CEF protocols.
-        ///
-        /// This class provides the necessary `CefAppProtocol` conformance to
-        /// ensure that events are handled correctly by the Chromium framework on macOS.
-        #[unsafe(super(NSApplication))]
-        #[ivars = SimpleApplicationIvars]
-        pub struct SimpleApplication;
-
-        unsafe impl CrAppControlProtocol for SimpleApplication {
-            #[unsafe(method(setHandlingSendEvent:))]
-            unsafe fn set_handling_send_event(&self, handling_send_event: Bool) {
-                self.ivars().handling_send_event.set(handling_send_event);
-            }
-        }
-
-        unsafe impl CrAppProtocol for SimpleApplication {
-            #[unsafe(method(isHandlingSendEvent))]
-            unsafe fn is_handling_send_event(&self) -> Bool {
-                self.ivars().handling_send_event.get()
-            }
-        }
-
-        unsafe impl CefAppProtocol for SimpleApplication {}
-    );
+#[cfg(all(feature = "sandbox", target_os = "windows"))]
+fn main() -> Result<(), &'static str> {
+    Err("Running in sandbox mode on Windows requires bootstrap.exe or bootstrapc.exe.")
 }

examples/cefsimple/src/shared/mod.rs

@@ -0,0 +1,75 @@
+//! Rust port of the [`cefsimple`](https://github.com/chromiumembedded/cef/tree/master/tests/cefsimple) example.
+
+use cef::*;
+
+pub mod resources;
+pub mod simple_app;
+pub mod simple_handler;
+
+#[cfg(target_os = "macos")]
+pub type Library = library_loader::LibraryLoader;
+
+#[cfg(not(target_os = "macos"))]
+pub type Library = ();
+
+#[allow(dead_code)]
+pub fn load_cef() -> Library {
+    #[cfg(target_os = "macos")]
+    let library = {
+        let loader = library_loader::LibraryLoader::new(&std::env::current_exe().unwrap(), false);
+        assert!(loader.load());
+        loader
+    };
+    #[cfg(not(target_os = "macos"))]
+    let library = ();
+
+    // Initialize the CEF API version.
+    let _ = api_hash(sys::CEF_API_VERSION_LAST, 0);
+
+    #[cfg(target_os = "macos")]
+    crate::mac::setup_simple_application();
+
+    library
+}
+
+#[allow(dead_code)]
+pub fn run_main(main_args: &MainArgs, cmd_line: &CommandLine, sandbox_info: *mut u8) {
+    let switch = CefString::from("type");
+    let is_browser_process = cmd_line.has_switch(Some(&switch)) != 1;
+
+    let ret = execute_process(Some(main_args), None, sandbox_info);
+
+    if is_browser_process {
+        println!("launch browser process");
+        assert_eq!(ret, -1, "cannot execute browser process");
+    } else {
+        let process_type = CefString::from(&cmd_line.switch_value(Some(&switch)));
+        println!("launch process {process_type}");
+        assert!(ret >= 0, "cannot execute non-browser process");
+        // non-browser process does not initialize cef
+        return;
+    }
+
+    let mut app = simple_app::SimpleApp::new();
+
+    let settings = Settings {
+        no_sandbox: !cfg!(feature = "sandbox") as _,
+        ..Default::default()
+    };
+    assert_eq!(
+        initialize(
+            Some(main_args),
+            Some(&settings),
+            Some(&mut app),
+            sandbox_info,
+        ),
+        1
+    );
+
+    #[cfg(target_os = "macos")]
+    let _delegate = crate::mac::setup_simple_app_delegate();
+
+    run_message_loop();
+
+    shutdown();
+}

examples/cefsimple/src/shared/resources.rs

@@ -0,0 +1,2 @@
+pub const IDI_CEFSIMPLE: u16 = 120;
+pub const IDI_SMALL: u16 = 121;

examples/cefsimple/src/shared/simple_app.rs

@@ -0,0 +1,215 @@
+use cef::*;
+use std::cell::RefCell;
+
+use super::simple_handler::*;
+
+wrap_window_delegate! {
+    struct SimpleWindowDelegate {
+        browser_view: RefCell<Option<BrowserView>>,
+        runtime_style: RuntimeStyle,
+        initial_show_state: ShowState,
+    }
+
+    impl ViewDelegate {
+        fn preferred_size(&self, _view: Option<&mut View>) -> Size {
+            Size {
+                width: 800,
+                height: 600,
+            }
+        }
+    }
+
+    impl PanelDelegate {}
+
+    impl WindowDelegate {
+        fn on_window_created(&self, window: Option<&mut Window>) {
+            // Add the browser view and show the window.
+            let browser_view = self.browser_view.borrow();
+            let (Some(window), Some(browser_view)) = (window, browser_view.as_ref()) else {
+                return;
+            };
+            let mut view = View::from(browser_view);
+            window.add_child_view(Some(&mut view));
+
+            if self.initial_show_state != ShowState::HIDDEN {
+                window.show();
+            }
+        }
+
+        fn on_window_destroyed(&self, _window: Option<&mut Window>) {
+            let mut browser_view = self.browser_view.borrow_mut();
+            *browser_view = None;
+        }
+
+        fn can_close(&self, _window: Option<&mut Window>) -> i32 {
+            // Allow the window to close if the browser says it's OK.
+            let browser_view = self.browser_view.borrow();
+            let browser_view = browser_view.as_ref().expect("BrowserView is None");
+            if let Some(browser) = browser_view.browser() {
+                let browser_host = browser.host().expect("BrowserHost is None");
+                browser_host.try_close_browser()
+            } else {
+                1
+            }
+        }
+
+        fn initial_show_state(&self, _window: Option<&mut Window>) -> ShowState {
+            self.initial_show_state
+        }
+
+        fn window_runtime_style(&self) -> RuntimeStyle {
+            self.runtime_style
+        }
+    }
+}
+
+wrap_browser_view_delegate! {
+    struct SimpleBrowserViewDelegate {
+        runtime_style: RuntimeStyle,
+    }
+
+    impl ViewDelegate {}
+
+    impl BrowserViewDelegate {
+        fn on_popup_browser_view_created(
+            &self,
+            _browser_view: Option<&mut BrowserView>,
+            popup_browser_view: Option<&mut BrowserView>,
+            _is_devtools: i32,
+        ) -> i32 {
+            // Create a new top-level Window for the popup. It will show itself after
+            // creation.
+            let mut window_delegate = SimpleWindowDelegate::new(
+                RefCell::new(popup_browser_view.cloned()),
+                self.runtime_style,
+                ShowState::NORMAL,
+            );
+            window_create_top_level(Some(&mut window_delegate));
+
+            // We created the Window.
+            1
+        }
+
+        fn browser_runtime_style(&self) -> RuntimeStyle {
+            self.runtime_style
+        }
+    }
+}
+
+wrap_app! {
+    pub struct SimpleApp;
+
+    impl App {
+        fn browser_process_handler(&self) -> Option<BrowserProcessHandler> {
+            Some(SimpleBrowserProcessHandler::new(RefCell::new(None)))
+        }
+    }
+}
+
+wrap_browser_process_handler! {
+    struct SimpleBrowserProcessHandler {
+        client: RefCell<Option<Client>>,
+    }
+
+    impl BrowserProcessHandler {
+        fn on_context_initialized(&self) {
+            debug_assert_ne!(currently_on(ThreadId::UI), 0);
+
+            // Check if Alloy style will be used.
+            let command_line = command_line_get_global().expect("Failed to get command line");
+            let use_alloy_style =
+                command_line.has_switch(Some(&CefString::from("use-alloy-style"))) != 0;
+            let runtime_style = if use_alloy_style {
+                RuntimeStyle::ALLOY
+            } else {
+                RuntimeStyle::DEFAULT
+            };
+
+            {
+                // SimpleHandler implements browser-level callbacks.
+                let mut client = self.client.borrow_mut();
+                *client = Some(SimpleHandlerClient::new(SimpleHandler::new(
+                    use_alloy_style,
+                )));
+            }
+
+            // Specify CEF browser settings here.
+            let settings = BrowserSettings::default();
+
+            // Check if a "--url=" value was provided via the command-line. If so, use
+            // that instead of the default URL.
+            let url = CefString::from(&command_line.switch_value(Some(&CefString::from("url"))))
+                .to_string();
+            let url = if url.is_empty() {
+                "https://www.google.com/"
+            } else {
+                url.as_str()
+            };
+            let url = CefString::from(url);
+
+            // Views is enabled by default (add `--use-native` to disable).
+            let use_views = command_line.has_switch(Some(&CefString::from("use-native"))) != 0;
+
+            // If using Views create the browser using the Views framework, otherwise
+            // create the browser using the native platform framework.
+            if use_views {
+                // Create the BrowserView.
+                let mut client = self.default_client();
+                let mut delegate = SimpleBrowserViewDelegate::new(runtime_style);
+                let browser_view = browser_view_create(
+                    client.as_mut(),
+                    Some(&url),
+                    Some(&settings),
+                    None,
+                    None,
+                    Some(&mut delegate),
+                );
+
+                // Optionally configure the initial show state.
+                let initial_show_state = CefString::from(
+                    &command_line.switch_value(Some(&CefString::from("initial-show-state"))),
+                )
+                .to_string();
+                let initial_show_state = match initial_show_state.as_str() {
+                    "minimized" => ShowState::MINIMIZED,
+                    "maximized" => ShowState::MAXIMIZED,
+                    // Hidden show state is only supported on MacOS.
+                    #[cfg(target_os = "macos")]
+                    "hidden" => ShowState::HIDDEN,
+                    _ => ShowState::NORMAL,
+                };
+
+                // Create the Window. It will show itself after creation.
+                let mut delegate = SimpleWindowDelegate::new(
+                    RefCell::new(browser_view),
+                    runtime_style,
+                    initial_show_state,
+                );
+                window_create_top_level(Some(&mut delegate));
+            } else {
+                // Information used when creating the native window.
+                let window_info = WindowInfo {
+                    runtime_style,
+                    ..Default::default()
+                };
+
+                #[cfg(target_os = "windows")]
+                let window_info = window_info.set_as_popup(Default::default(), "cefsimple");
+
+                let mut client = self.default_client();
+                browser_host_create_browser(
+                    Some(&window_info),
+                    client.as_mut(),
+                    Some(&url),
+                    Some(&settings),
+                    None,
+                    None,
+                );
+            }
+        }
+
+        fn default_client(&self) -> Option<Client> {
+            self.client.borrow().clone()
+        }
+    }
+}

examples/cefsimple/src/shared/simple_handler/linux.rs

@@ -0,0 +1,76 @@
+use cef::*;
+
+fn window_from_browser(browser: Option<&mut Browser>) -> Option<WindowHandle> {
+    let window = browser?.host()?.window_handle();
+    if window == 0 { None } else { Some(window) }
+}
+
+pub fn platform_title_change(browser: Option<&mut Browser>, _title: Option<&CefString>) {
+    // Retrieve the X11 display shared with Chromium.
+    let display = get_xdisplay();
+    if display.is_null() {
+        return;
+    }
+
+    // Retrieve the X11 window handle for the browser.
+    let Some(_window) = window_from_browser(browser) else {
+        return;
+    };
+
+    #[cfg(feature = "linux-x11")]
+    unsafe {
+        use std::ffi::{CString, c_char};
+        use x11_dl::xlib::*;
+
+        // Load the Xlib library dynamically.
+        let Ok(xlib) = Xlib::open() else {
+            return;
+        };
+
+        // Retrieve the atoms required by the below XChangeProperty call.
+        let Ok(names) = ["_NET_WM_NAME", "UTF8_STRING"]
+            .into_iter()
+            .map(CString::new)
+            .collect::<Result<Vec<_>, _>>()
+        else {
+            return;
+        };
+        let mut names: Vec<_> = names
+            .iter()
+            .map(|name| name.as_ptr() as *mut c_char)
+            .collect();
+        let mut atoms = [0; 2];
+        let result = (xlib.XInternAtoms)(
+            display as *mut _,
+            names.as_mut_ptr(),
+            2,
+            0,
+            atoms.as_mut_ptr(),
+        );
+        if result == 0 {
+            return;
+        }
+
+        // Set the window title.
+        let Ok(title) = CString::new(_title.map(CefString::to_string).unwrap_or_default()) else {
+            return;
+        };
+        let title = title.as_c_str();
+        (xlib.XChangeProperty)(
+            display as *mut _,
+            _window,
+            atoms[0],
+            atoms[1],
+            8,
+            PropModeReplace,
+            title.as_ptr() as *const _,
+            title.count_bytes() as i32,
+        );
+
+        // TODO(erg): This is technically wrong. So XStoreName and friends expect
+        // this in Host Portable Character Encoding instead of UTF-8, which I believe
+        // is Compound Text. This shouldn't matter 90% of the time since this is the
+        // fallback to the UTF8 property above.
+        (xlib.XStoreName)(display as *mut _, _window, title.as_ptr());
+    }
+}

examples/cefsimple/src/shared/simple_handler/mac.rs

@@ -0,0 +1,29 @@
+use cef::*;
+use objc2::{Message, rc::Retained};
+use objc2_app_kit::{NSView, NSWindow};
+use objc2_foundation::NSString;
+
+fn window_from_browser(browser: Option<&mut Browser>) -> Option<Retained<NSWindow>> {
+    let view_ptr = browser?.host()?.window_handle().cast::<NSView>();
+    let view = unsafe { view_ptr.as_ref()? };
+    let view = view.retain();
+    view.window()
+}
+
+pub fn platform_title_change(browser: Option<&mut Browser>, title: Option<&CefString>) {
+    let Some(window) = window_from_browser(browser) else {
+        return;
+    };
+
+    let title = title.map(CefString::to_string).unwrap_or_default();
+    let title = NSString::from_str(&title);
+    window.setTitle(&title);
+}
+
+pub fn platform_show_window(browser: Option<&mut Browser>) {
+    let Some(window) = window_from_browser(browser) else {
+        return;
+    };
+
+    window.makeKeyAndOrderFront(Some(&window));
+}

examples/cefsimple/src/shared/simple_handler/mod.rs

@@ -0,0 +1,326 @@
+use cef::*;
+use std::sync::{Arc, Mutex, OnceLock, Weak};
+
+fn get_data_uri(data: &[u8], mime_type: &str) -> String {
+    let data = CefString::from(&base64_encode(Some(data)));
+    let uri = CefString::from(&uriencode(Some(&data), 0)).to_string();
+    format!("data:{mime_type};base64,{uri}")
+}
+
+#[cfg(target_os = "macos")]
+mod mac;
+#[cfg(target_os = "macos")]
+use mac::*;
+
+#[cfg(target_os = "windows")]
+mod win;
+#[cfg(target_os = "windows")]
+use win::*;
+
+#[cfg(target_os = "linux")]
+mod linux;
+#[cfg(target_os = "linux")]
+use linux::*;
+
+#[cfg(not(target_os = "macos"))]
+fn platform_show_window(_browser: Option<&mut Browser>) {
+    todo!("Implement platform_show_window for non-macOS platforms");
+}
+
+static SIMPLE_HANDLER_INSTANCE: OnceLock<Weak<Mutex<SimpleHandler>>> = OnceLock::new();
+
+pub struct SimpleHandler {
+    is_alloy_style: bool,
+    browser_list: Vec<Browser>,
+    is_closing: bool,
+    weak_self: Weak<Mutex<Self>>,
+}
+
+impl SimpleHandler {
+    pub fn instance() -> Option<Arc<Mutex<Self>>> {
+        SIMPLE_HANDLER_INSTANCE
+            .get()
+            .and_then(|weak| weak.upgrade())
+    }
+
+    pub fn new(is_alloy_style: bool) -> Arc<Mutex<Self>> {
+        Arc::new_cyclic(|weak| {
+            if let Err(instance) = SIMPLE_HANDLER_INSTANCE.set(weak.clone()) {
+                assert_eq!(instance.strong_count(), 0, "Replacing a viable instance");
+            }
+
+            Mutex::new(Self {
+                is_alloy_style,
+                browser_list: Vec::new(),
+                is_closing: false,
+                weak_self: weak.clone(),
+            })
+        })
+    }
+
+    fn on_title_change(&mut self, browser: Option<&mut Browser>, title: Option<&CefString>) {
+        debug_assert_ne!(currently_on(ThreadId::UI), 0);
+
+        let mut browser = browser.cloned();
+        if let Some(browser_view) = browser_view_get_for_browser(browser.as_mut()) {
+            if let Some(window) = browser_view.window() {
+                window.set_title(title);
+            }
+        } else if self.is_alloy_style {
+            platform_title_change(browser.as_mut(), title);
+        }
+    }
+
+    fn on_after_created(&mut self, browser: Option<&mut Browser>) {
+        debug_assert_ne!(currently_on(ThreadId::UI), 0);
+
+        let browser = browser.cloned().expect("Browser is None");
+
+        // Sanity-check the configured runtime style.
+        assert_eq!(
+            browser.host().expect("BrowserHost is None").runtime_style(),
+            if self.is_alloy_style {
+                RuntimeStyle::ALLOY
+            } else {
+                RuntimeStyle::CHROME
+            }
+        );
+
+        // Add to the list of existing browsers.
+        self.browser_list.push(browser);
+    }
+
+    fn do_close(&mut self, _browser: Option<&mut Browser>) -> bool {
+        debug_assert_ne!(currently_on(ThreadId::UI), 0);
+
+        // Closing the main window requires special handling. See the DoClose()
+        // documentation in the CEF header for a detailed destription of this
+        // process.
+        if self.browser_list.len() == 1 {
+            // Set a flag to indicate that the window close should be allowed.
+            self.is_closing = true;
+        }
+
+        // Allow the close. For windowed browsers this will result in the OS close
+        // event being sent.
+        false
+    }
+
+    fn on_before_close(&mut self, browser: Option<&mut Browser>) {
+        debug_assert_ne!(currently_on(ThreadId::UI), 0);
+
+        // Remove from the list of existing browsers.
+        let mut browser = browser.cloned().expect("Browser is None");
+        if let Some(index) = self
+            .browser_list
+            .iter()
+            .position(move |elem| elem.is_same(Some(&mut browser)) != 0)
+        {
+            self.browser_list.remove(index);
+        }
+
+        if self.browser_list.is_empty() {
+            // All browser windows have closed. Quit the application message loop.
+            quit_message_loop();
+        }
+    }
+
+    fn on_load_error(
+        &mut self,
+        _browser: Option<&mut Browser>,
+        frame: Option<&mut Frame>,
+        error_code: Errorcode,
+        error_text: Option<&CefString>,
+        failed_url: Option<&CefString>,
+    ) {
+        debug_assert_ne!(currently_on(ThreadId::UI), 0);
+
+        // Allow Chrome to show the error page.
+        if !self.is_alloy_style {
+            return;
+        }
+
+        // Don't display an error for downloaded files.
+        let error_code = sys::cef_errorcode_t::from(error_code);
+        if error_code == sys::cef_errorcode_t::ERR_ABORTED {
+            return;
+        }
+        let error_code = error_code as i32;
+
+        let frame = frame.expect("Frame is None");
+
+        // Display a load error message using a data: URI.
+        let error_text = error_text.map(CefString::to_string).unwrap_or_default();
+        let failed_url = failed_url.map(CefString::to_string).unwrap_or_default();
+        let data = format!(
+            r#"
+            <html>
+                <body bgcolor="white">
+                    <h2>Failed to load URL {failed_url} with error {error_text} ({error_code}).</h2>
+                </body>
+            </html>
+            "#
+        );
+
+        let uri = get_data_uri(data.as_bytes(), "text/html");
+        let uri = CefString::from(uri.as_str());
+        frame.load_url(Some(&uri));
+    }
+
+    pub fn show_main_window(&mut self) {
+        let thread_id = ThreadId::UI;
+        if currently_on(thread_id) == 0 {
+            // Execute on the UI thread.
+            let this = self
+                .weak_self
+                .upgrade()
+                .expect("Weak reference to SimpleHandler is None");
+            let mut task = ShowMainWindow::new(this);
+            post_task(thread_id, Some(&mut task));
+            return;
+        }
+
+        let Some(mut main_browser) = self.browser_list.first().cloned() else {
+            return;
+        };
+
+        if let Some(browser_view) = browser_view_get_for_browser(Some(&mut main_browser)) {
+            // Show the window using the Views framework.
+            if let Some(window) = browser_view.window() {
+                window.show();
+            }
+        } else if self.is_alloy_style {
+            platform_show_window(Some(&mut main_browser));
+        }
+    }
+
+    pub fn close_all_browsers(&mut self, force_close: bool) {
+        let thread_id = ThreadId::UI;
+        if currently_on(thread_id) == 0 {
+            // Execute on the UI thread.
+            let this = self
+                .weak_self
+                .upgrade()
+                .expect("Weak reference to SimpleHandler is None");
+            let mut task = CloseAllBrowsers::new(this, force_close);
+            post_task(thread_id, Some(&mut task));
+            return;
+        }
+
+        for browser in self.browser_list.iter() {
+            let browser_host = browser.host().expect("BrowserHost is None");
+            browser_host.close_browser(force_close.into());
+        }
+    }
+
+    pub fn is_closing(&self) -> bool {
+        self.is_closing
+    }
+}
+
+wrap_client! {
+    pub struct SimpleHandlerClient {
+        inner: Arc<Mutex<SimpleHandler>>,
+    }
+
+    impl Client {
+        fn display_handler(&self) -> Option<DisplayHandler> {
+            Some(SimpleHandlerDisplayHandler::new(self.inner.clone()))
+        }
+
+        fn life_span_handler(&self) -> Option<LifeSpanHandler> {
+            Some(SimpleHandlerLifeSpanHandler::new(self.inner.clone()))
+        }
+
+        fn load_handler(&self) -> Option<LoadHandler> {
+            Some(SimpleHandlerLoadHandler::new(self.inner.clone()))
+        }
+    }
+}
+
+wrap_display_handler! {
+    struct SimpleHandlerDisplayHandler {
+        inner: Arc<Mutex<SimpleHandler>>,
+    }
+
+    impl DisplayHandler {
+        fn on_title_change(&self, browser: Option<&mut Browser>, title: Option<&CefString>) {
+            let mut inner = self.inner.lock().expect("Failed to lock inner");
+            inner.on_title_change(browser, title);
+        }
+    }
+}
+
+wrap_life_span_handler! {
+    struct SimpleHandlerLifeSpanHandler {
+        inner: Arc<Mutex<SimpleHandler>>,
+    }
+
+    impl LifeSpanHandler {
+        fn on_after_created(&self, browser: Option<&mut Browser>) {
+            let mut inner = self.inner.lock().expect("Failed to lock inner");
+            inner.on_after_created(browser);
+        }
+
+        fn do_close(&self, browser: Option<&mut Browser>) -> i32 {
+            let mut inner = self.inner.lock().expect("Failed to lock inner");
+            inner.do_close(browser).into()
+        }
+
+        fn on_before_close(&self, browser: Option<&mut Browser>) {
+            let mut inner = self.inner.lock().expect("Failed to lock inner");
+            inner.on_before_close(browser);
+        }
+    }
+}
+
+wrap_load_handler! {
+    struct SimpleHandlerLoadHandler {
+        inner: Arc<Mutex<SimpleHandler>>,
+    }
+
+    impl LoadHandler {
+        fn on_load_error(
+            &self,
+            browser: Option<&mut Browser>,
+            frame: Option<&mut Frame>,
+            error_code: Errorcode,
+            error_text: Option<&CefString>,
+            failed_url: Option<&CefString>,
+        ) {
+            let mut inner = self.inner.lock().expect("Failed to lock inner");
+            inner.on_load_error(browser, frame, error_code, error_text, failed_url);
+        }
+    }
+}
+
+wrap_task! {
+    struct ShowMainWindow {
+        inner: Arc<Mutex<SimpleHandler>>,
+    }
+
+    impl Task {
+        fn execute(&self) {
+            debug_assert_ne!(currently_on(ThreadId::UI), 0);
+
+            let mut inner = self.inner.lock().expect("Failed to lock inner");
+            inner.show_main_window();
+        }
+    }
+}
+
+wrap_task! {
+    struct CloseAllBrowsers {
+        inner: Arc<Mutex<SimpleHandler>>,
+        force_close: bool,
+    }
+
+    impl Task {
+        fn execute(&self) {
+            debug_assert_ne!(currently_on(ThreadId::UI), 0);
+
+            let mut inner = self.inner.lock().expect("Failed to lock inner");
+            inner.close_all_browsers(self.force_close);
+        }
+    }
+}

examples/cefsimple/src/shared/simple_handler/win.rs

@@ -0,0 +1,18 @@
+use cef::*;
+use std::iter;
+use windows_sys::Win32::{Foundation::HWND, UI::WindowsAndMessaging::*};
+
+fn window_from_browser(browser: Option<&mut Browser>) -> Option<HWND> {
+    let window = browser?.host()?.window_handle().0;
+    Some(window.cast())
+}
+
+pub fn platform_title_change(browser: Option<&mut Browser>, title: Option<&CefString>) {
+    let Some(window) = window_from_browser(browser) else {
+        return;
+    };
+
+    let title = title.map(CefString::to_string).unwrap_or_default();
+    let title: Vec<_> = title.encode_utf16().chain(iter::once(0)).collect();
+    unsafe { SetWindowTextW(window, title.as_ptr()) };
+}

examples/cefsimple/src/win.rs

@@ -0,0 +1,21 @@
+use crate::shared;
+use cef::*;
+
+#[unsafe(no_mangle)]
+unsafe extern "C" fn RunWinMain(
+    instance: sys::HINSTANCE,
+    _command_line: *const u8,
+    _command_show: i32,
+    sandbox_info: *mut u8,
+) -> i32 {
+    let _library = shared::load_cef();
+
+    let main_args = MainArgs { instance };
+    let args = args::Args::from(main_args);
+    let Some(cmd_line) = args.as_cmd_line() else {
+        return 1;
+    };
+
+    shared::run_main(args.as_main_args(), &cmd_line, sandbox_info);
+    0
+}

examples/osr/Cargo.toml

@@ -7,6 +7,9 @@ publish = false
 default = ["accelerated_osr"]
 accelerated_osr = ["cef/accelerated_osr"]
 
+[package.metadata.cef.bundle]
+helper_name = "cefsimple_helper"
+
 [dependencies]
 cef.workspace = true
 wgpu.workspace = true

examples/osr/src/webrender.rs

@@ -33,8 +33,10 @@ wrap_app! {
             command_line.append_switch(Some(&"hide-crash-restore-bubble".into()));
             command_line.append_switch(Some(&"use-mock-keychain".into()));
             command_line.append_switch(Some(&"enable-logging=stderr".into()));
-            command_line
-                .append_switch_with_value(Some(&"remote-debugging-port".into()), Some(&"9229".into()));
+            command_line.append_switch_with_value(
+                Some(&"remote-debugging-port".into()),
+                Some(&"9229".into()),
+            );
         }
 
         fn browser_process_handler(&self) -> Option<cef::BrowserProcessHandler> {
@@ -223,7 +225,9 @@ wrap_render_handler! {
                                 ty: wgpu::BindingType::Texture {
                                     multisampled: false,
                                     view_dimension: wgpu::TextureViewDimension::D2,
-                                    sample_type: wgpu::TextureSampleType::Float { filterable: true },
+                                    sample_type: wgpu::TextureSampleType::Float {
+                                        filterable: true,
+                                    },
                                 },
                                 count: None,
                             },
@@ -348,7 +352,9 @@ wrap_render_handler! {
                                 ty: wgpu::BindingType::Texture {
                                     multisampled: false,
                                     view_dimension: wgpu::TextureViewDimension::D2,
-                                    sample_type: wgpu::TextureSampleType::Float { filterable: true },
+                                    sample_type: wgpu::TextureSampleType::Float {
+                                        filterable: true,
+                                    },
                                 },
                                 count: None,
                             },

examples/tests_shared/Cargo.toml

@@ -0,0 +1,34 @@
+[package]
+name = "tests_shared"
+publish = false
+
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+authors.workspace = true
+repository.workspace = true
+
+[features]
+sandbox = ["cef/sandbox"]
+
+[dependencies]
+cef.workspace = true
+
+[target.'cfg(target_os = "windows")'.dependencies.windows-sys]
+workspace = true
+features = [
+    "Win32_System_Performance",
+    "Win32_System_SystemServices",
+    "Win32_UI_WindowsAndMessaging",
+    "Win32_Foundation",
+    "Win32_Graphics_Gdi",
+    "Win32_UI_Input_KeyboardAndMouse",
+]
+
+[target.'cfg(target_os = "macos")'.dependencies]
+objc2.workspace = true
+objc2-app-kit = { workspace = true, features = ["NSApplication", "NSResponder"] }
+objc2-foundation.workspace = true
+
+[target.'cfg(target_os = "linux")'.dependencies]
+glib.workspace = true

examples/tests_shared/resources/osr_test.html

@@ -0,0 +1,205 @@
+<html>
+  <head><title>OSR Test</title></head>
+  <style>
+  .red_hover:hover {color:red;}
+  #li { width: 530px; }
+  body {background:rgba(255, 0, 0, 0.5); }
+  input {-webkit-appearance: none; }
+  #LI11select {width: 75px;}
+  #LI11select option { background-color: cyan; }
+  .dropdiv {
+    width:50px;
+    height:50px;
+    border:1px solid #aaaaaa;
+    float: left;
+  }
+  #dragdiv {
+    width: 30px;
+    height: 30px;
+    background-color: green;
+    margin: 10px;
+  }
+  #draghere {
+    position: relative;
+    z-index: -1;
+    top: 7px;
+    left: 7px;
+    opacity: 0.4;
+  }
+  #touchdiv, #pointerdiv {
+    width: 100px;
+    height: 50px;
+    background-color: red;
+    float: left;
+    margin-left: 10px;
+  }
+  </style>
+  <script>
+  function getElement(id) { return document.getElementById(id); }
+  function makeH1Red() { getElement('LI00').style.color='red'; }
+  function makeH1Black() { getElement('LI00').style.color='black'; }
+  function navigate() { location.href='?k='+getElement('editbox').value; }
+  function load() {
+    var elems = [];
+    var param = { type: 'ElementBounds', elems: elems };
+
+    elems.push(getElementBounds('LI00'));
+    elems.push(getElementBounds('LI01'));
+    elems.push(getElementBounds('LI02'));
+    elems.push(getElementBounds('LI03'));
+    elems.push(getElementBounds('LI04'));
+    elems.push(getElementBounds('LI05'));
+    elems.push(getElementBounds('LI06'));
+    elems.push(getElementBounds('LI07'));
+    elems.push(getElementBounds('LI08'));
+    elems.push(getElementBounds('LI09'));
+    elems.push(getElementBounds('LI10'));
+    elems.push(getElementBounds('LI11'));
+    elems.push(getElementBounds('LI11select'));
+    elems.push(getElementBounds('email'));
+    elems.push(getElementBounds('quickmenu'));
+    elems.push(getElementBounds('editbox'));
+    elems.push(getElementBounds('btnnavigate'));
+    elems.push(getElementBounds('dropdiv'));
+    elems.push(getElementBounds('dragdiv'));
+    elems.push(getElementBounds('touchdiv'));
+    elems.push(getElementBounds('pointerdiv'));
+
+    if (window.testQuery)
+      window.testQuery({request: JSON.stringify(param)});
+
+    fillDropDown();
+  }
+
+  function fillDropDown() {
+    var select = document.getElementById('LI11select');
+    for (var i = 1; i < 21; i++)
+      select.options.add(new Option('Option ' + i, i));
+  }
+
+  function getElementBounds(id) {
+    var element = document.getElementById(id);
+    var bounds = element.getBoundingClientRect();
+    return {
+      id: id,
+      x: Math.floor(bounds.x),
+      y: Math.floor(bounds.y),
+      width: Math.floor(bounds.width),
+      height: Math.floor(bounds.height)
+    };
+  }
+
+  function onEventTest(event) {
+    var param = 'osr' + event.type;
+
+    if (event.type == "click")
+      param += event.button;
+
+    // Results in a call to the OnQuery method in os_rendering_unittest.cc.
+    if (window.testQuery)
+      window.testQuery({request: param});
+  }
+
+  function onFocusTest(ev) {
+    if (window.testQuery)
+      window.testQuery({request: "osrfocus" + ev.target.id});
+  }
+
+  function allowDrop(ev) {
+    ev.preventDefault();
+  }
+
+  function drag(ev) {
+    ev.dataTransfer.setData("Text",ev.target.id);
+  }
+
+  function drop(ev) {
+    var data=ev.dataTransfer.getData("Text");
+    ev.target.innerHTML = '';
+    var dragged = document.getElementById(data);
+    dragged.setAttribute('draggable', 'false');
+    ev.target.appendChild(dragged);
+    if (window.testQuery)
+      window.testQuery({request: "osrdrop"});
+  }
+
+  function selectText(ev) {
+    var element = ev.target;
+    var selection = window.getSelection();
+    var range = document.createRange();
+    range.selectNodeContents(element);
+    selection.removeAllRanges();
+    selection.addRange(range);
+  }
+
+  function onTouchEvent(ev) {
+    var param = 'osr' + ev.type;
+    // For Touch start also include touch points.
+    if (event.type == "touchstart")
+      param += ev.touches.length;
+    // For Touch Move include the touches that changed.
+    if (event.type == "touchmove")
+      param += ev.changedTouches.length;
+
+    // Results in a call to the OnQuery method in os_rendering_unittest.cc.
+    if (window.testQuery)
+      window.testQuery({request: param});
+  }
+
+  function onPointerEvent(ev) {
+    var param = 'osr' +  ev.type + ' ' + ev.pointerType;
+    if (window.testQuery)
+      window.testQuery({request: param});
+  }
+
+  </script>
+  <body onfocus='onEventTest(event)' onblur='onEventTest(event)' onload='load();'>
+  <h1 id='LI00' onclick="onEventTest(event)">
+    OSR Testing h1 - Focus and blur
+    <select id='LI11select'>
+      <option value='0'>Default</option>
+    </select>
+    this page and will get this red black
+  </h1>
+  <ol>
+  <li id='LI01'>OnPaint should be called each time a page loads</li>
+  <li id='LI02' style='cursor:pointer;'><span>Move mouse
+      to require an OnCursorChange call</span></li>
+  <li id='LI03' onmousemove="onEventTest(event)"><span>Hover will color this with
+      red. Will trigger OnPaint once on enter and once on leave</span></li>
+  <li id='LI04'>Right clicking will show contextual menu and will request
+      GetScreenPoint</li>
+  <li id='LI05'>IsWindowRenderingDisabled should be true</li>
+  <li id='LI06'>WasResized should trigger full repaint if size changes.
+      </li>
+  <li id='LI07'>Invalidate should trigger OnPaint once</li>
+  <li id='LI08'>Click and write here with SendKeyEvent to trigger repaints:
+      <input id='editbox' type='text' value='' size="5" onfocus="onFocusTest(event)"></li>
+  <li id='LI09'>Click here with SendMouseClickEvent to navigate:
+      <input id='btnnavigate' type='button' onclick='navigate()'
+      value='Click here to navigate' /></li>
+  <li id='LI10' title='EXPECTED_TOOLTIP'>Mouse over this element will
+      trigger show a tooltip</li>
+  <li id='LI11' onclick='selectText(event)'>SELECTED_TEXT_RANGE</li>
+  <li><input id='email' type='text' size=10 inputmode='email' onfocus="onFocusTest(event)"></li>
+  <li id="quickmenu">Long touch press should trigger quick menu</li>
+  </ol>
+
+  <div class="dropdiv" id="dropdiv" ondrop="drop(event)" ondragover="allowDrop(event)">
+    <span id="draghere">Drag here</span>
+  </div>
+  <div class="dropdiv">
+    <div id="dragdiv" draggable="true" ondragstart="drag(event)"></div>
+  </div>
+  <div id="touchdiv" ontouchstart="onTouchEvent(event)" ontouchend="onTouchEvent(event)" ontouchmove="onTouchEvent(event)" ontouchcancel="onTouchEvent(event)">
+  </div>
+  <div id="pointerdiv" onpointerdown="onPointerEvent(event)" onpointerup="onPointerEvent(event)" onpointermove="onPointerEvent(event)" onpointercancel="onPointerEvent(event)">
+  </div>
+  <br />
+  <br />
+  <br />
+  <br />
+  <br />
+  <br />
+  </body>
+</html>

examples/tests_shared/resources/pdf.html

@@ -0,0 +1,9 @@
+<html>
+<head>
+<title>PDF Test</title>
+</head>
+<body bgcolor="white">
+<iframe src="pdf.pdf" width="500" height="500"></iframe>
+<iframe src="pdf.pdf" width="500" height="500"></iframe>
+</body>
+</html>

examples/tests_shared/src/browser/client_app_browser.rs

@@ -0,0 +1,262 @@
+use crate::{
+    browser::main_message_loop_external_pump::*,
+    common::{client_app::*, client_switches::*},
+};
+use cef::*;
+use std::{
+    path::{Path, PathBuf},
+    sync::Arc,
+};
+
+pub trait Delegate: Send {
+    fn on_before_command_line_processing(
+        &self,
+        _app: &Arc<ClientAppBrowser>,
+        _command_line: &mut CommandLine,
+    ) {
+    }
+
+    fn on_register_custom_preferences(
+        &self,
+        _app: &Arc<ClientAppBrowser>,
+        _type_: PreferencesType,
+        _registrar: &mut PreferenceRegistrar,
+    ) {
+    }
+
+    fn on_context_initialized(&self, _app: &Arc<ClientAppBrowser>) {}
+
+    fn on_already_running_app_relaunch(
+        &self,
+        _app: &Arc<ClientAppBrowser>,
+        _command_line: &mut CommandLine,
+        _current_directory: &Path,
+    ) -> bool {
+        false
+    }
+
+    fn default_client(&self, _app: &Arc<ClientAppBrowser>) -> Option<Client> {
+        None
+    }
+}
+
+pub struct ClientAppBrowser {
+    delegates: Vec<Box<dyn Delegate>>,
+}
+
+impl ClientAppBrowser {
+    pub fn new(delegates: Vec<Box<dyn Delegate>>) -> Arc<Self> {
+        Arc::new(Self { delegates })
+    }
+
+    pub fn populate_settings(
+        command_line: Option<CommandLine>,
+        cookieable_schemes: Vec<String>,
+        settings: Settings,
+    ) -> Settings {
+        #[cfg(any(target_os = "windows", target_os = "linux"))]
+        let settings = {
+            Settings {
+                multi_threaded_message_loop: command_line.as_ref().map_or(0, |command_line| {
+                    command_line.has_switch(Some(&CefString::from(MULTI_THREADED_MESSAGE_LOOP)))
+                }),
+                ..settings
+            }
+        };
+
+        let settings = if settings.multi_threaded_message_loop == 0 {
+            Settings {
+                external_message_pump: command_line.as_ref().map_or(0, |command_line| {
+                    command_line.has_switch(Some(&CefString::from(EXTERNAL_MESSAGE_PUMP)))
+                }),
+                ..settings
+            }
+        } else {
+            settings
+        };
+
+        let cookieable_schemes_list = CefString::from(cookieable_schemes.join(",").as_str());
+
+        Settings {
+            cookieable_schemes_list,
+            ..settings
+        }
+    }
+
+    pub fn delegates(&self) -> &[Box<dyn Delegate>] {
+        &self.delegates
+    }
+}
+
+wrap_app! {
+    pub struct ClientAppBrowserApp {
+        base: ClientApp,
+        client_app_browser: Arc<ClientAppBrowser>,
+    }
+
+    impl App {
+        fn on_before_command_line_processing(
+            &self,
+            process_type: Option<&CefString>,
+            command_line: Option<&mut CommandLine>,
+        ) {
+            let (Some(process_type), Some(command_line)) = (process_type, command_line) else {
+                return;
+            };
+
+            // Pass additional command-line flags to the browser process.
+            if process_type.to_string().is_empty() {
+                // Pass additional command-line flags when off-screen rendering is enabled.
+                if command_line.has_switch(Some(&CefString::from(OFF_SCREEN_RENDERING_ENABLED)))
+                    != 0
+                    && command_line.has_switch(Some(&CefString::from(SHARED_TEXTURE_ENABLED))) == 0
+                {
+                    // Use software rendering and compositing (disable GPU) for increased FPS
+                    // and decreased CPU usage. This will also disable WebGL so remove these
+                    // switches if you need that capability.
+                    // See https://github.com/chromiumembedded/cef/issues/1257 for details.
+                    if command_line.has_switch(Some(&CefString::from(ENABLE_GPU))) == 0 {
+                        command_line.append_switch(Some(&CefString::from("disable-gpu")));
+                        command_line
+                            .append_switch(Some(&CefString::from("disable-gpu-compositing")));
+                    }
+                }
+
+                if command_line.has_switch(Some(&CefString::from(USE_VIEWS))) != 0
+                    && command_line.has_switch(Some(&CefString::from("top-chrome-md"))) == 0
+                {
+                    // Use non-material mode on all platforms by default. Among other things
+                    // this causes menu buttons to show hover state. See usage of
+                    // MaterialDesignController::IsModeMaterial() in Chromium code.
+                    command_line.append_switch_with_value(
+                        Some(&CefString::from("top-chrome-md")),
+                        Some(&CefString::from("non-material")),
+                    );
+                }
+
+                // Disable the toolchain prompt on macOS.
+                #[cfg(target_os = "macos")]
+                command_line.append_switch(Some(&CefString::from("use-mock-keychain")));
+
+                // On Linux, in off screen rendering (OSR) shared texture mode, we must
+                // ensure that ANGLE uses the EGL backend. Without this, DMABUF based
+                // rendering will fail. The Chromium fallback path uses X11 pixmaps,
+                // which are only supported by Mesa drivers (e.g., AMD and Intel).
+                //
+                // While Mesa supports DMABUFs via both EGL and pixmaps, the EGL based
+                // DMA BUF import path is more robust and required for compatibility with
+                // drivers like NVIDIA that do not support pixmaps.
+                //
+                // We also append the kOzonePlatform switch with value x11 to ensure
+                // that X11 semantics are preserved, which is necessary for compatibility
+                // with some GDK/X11 integrations (e.g. Wayland with AMD).
+                #[cfg(target_os = "linux")]
+                if command_line.has_switch(Some(&CefString::from(OFF_SCREEN_RENDERING_ENABLED)))
+                    != 0
+                    && command_line.has_switch(Some(&CefString::from(SHARED_TEXTURE_ENABLED))) != 0
+                {
+                    if command_line.has_switch(Some(&CefString::from(USE_ANGLE))) == 0 {
+                        command_line.append_switch_with_value(
+                            Some(&CefString::from(USE_ANGLE)),
+                            Some(&CefString::from("gl-egl")),
+                        );
+                    }
+                    if command_line.has_switch(Some(&CefString::from(OZONE_PLATFORM))) == 0 {
+                        command_line.append_switch_with_value(
+                            Some(&CefString::from(OZONE_PLATFORM)),
+                            Some(&CefString::from("X11")),
+                        );
+                    }
+                }
+            }
+
+            for delegate in self.client_app_browser.delegates() {
+                delegate.on_before_command_line_processing(&self.client_app_browser, command_line);
+            }
+        }
+
+        fn on_register_custom_schemes(&self, registrar: Option<&mut SchemeRegistrar>) {
+            self.base.on_register_custom_schemes(registrar);
+        }
+
+        fn browser_process_handler(&self) -> Option<BrowserProcessHandler> {
+            Some(ClientAppBrowserProcessHandler::new(
+                self.client_app_browser.clone(),
+            ))
+        }
+    }
+}
+
+wrap_browser_process_handler! {
+    pub struct ClientAppBrowserProcessHandler {
+        client_app_browser: Arc<ClientAppBrowser>,
+    }
+
+    impl BrowserProcessHandler {
+        fn on_register_custom_preferences(
+            &self,
+            type_: PreferencesType,
+            registrar: Option<&mut PreferenceRegistrar>,
+        ) {
+            let Some(registrar) = registrar else {
+                return;
+            };
+
+            for delegate in self.client_app_browser.delegates() {
+                delegate.on_register_custom_preferences(&self.client_app_browser, type_, registrar);
+            }
+        }
+
+        fn on_context_initialized(&self) {
+            for delegate in self.client_app_browser.delegates() {
+                delegate.on_context_initialized(&self.client_app_browser);
+            }
+        }
+
+        fn on_already_running_app_relaunch(
+            &self,
+            command_line: Option<&mut CommandLine>,
+            current_directory: Option<&CefString>,
+        ) -> i32 {
+            let (Some(command_line), Some(current_directory)) = (command_line, current_directory)
+            else {
+                return 0;
+            };
+
+            let delegates = self.client_app_browser.delegates();
+            if !delegates.is_empty() {
+                let current_directory = PathBuf::from(current_directory.to_string().as_str());
+
+                for delegate in delegates {
+                    if delegate.on_already_running_app_relaunch(
+                        &self.client_app_browser,
+                        command_line,
+                        current_directory.as_path(),
+                    ) {
+                        return 1;
+                    }
+                }
+            }
+
+            0
+        }
+
+        fn on_schedule_message_pump_work(&self, delay_ms: i64) {
+            if let Some(message_loop) = get_main_message_loop() {
+                if let Ok(mut message_loop) = message_loop.lock() {
+                    message_loop.on_schedule_message_pump_work(delay_ms);
+                }
+            }
+        }
+
+        fn default_client(&self) -> Option<Client> {
+            for delegate in self.client_app_browser.delegates() {
+                let client = delegate.default_client(&self.client_app_browser);
+                if client.is_some() {
+                    return client;
+                }
+            }
+            None
+        }
+    }
+}

examples/tests_shared/src/browser/file_util.rs

@@ -0,0 +1,81 @@
+use cef::*;
+use std::{
+    fs::File,
+    io::{Read, Write},
+    path::Path,
+};
+
+fn allow_file_io() -> bool {
+    currently_on(ThreadId::UI) == 0 && currently_on(ThreadId::IO) == 0
+}
+
+/// Reads the file at `path` into `contents` and returns true on success and
+/// false on error.  In case of I/O error, `contents` holds the data that could
+/// be read from the file before the error occurred.  When the file size exceeds
+/// `max_size`, the function returns false with `contents` holding the file
+/// truncated to `max_size`. `contents` may be [None], in which case this
+/// function is useful for its side effect of priming the disk cache (could be
+/// used for unit tests). Calling this function on the browser process UI or IO
+/// threads is not allowed.
+pub fn read_file_to_buffer<P: AsRef<Path>>(
+    path: P,
+    contents: &mut Option<Vec<u8>>,
+    max_size: usize,
+) -> bool {
+    if !allow_file_io() {
+        return false;
+    }
+
+    if let Some(contents) = contents.as_mut() {
+        contents.clear();
+        contents.reserve(max_size);
+    }
+    let Ok(mut file) = File::open(path) else {
+        return false;
+    };
+
+    // Many files supplied in `path` have incorrect size (proc files etc).
+    // Hence, the file is read sequentially as opposed to a one-shot read.
+    const BUFFER_SIZE: usize = 1 << 16;
+    let mut buffer = vec![0; BUFFER_SIZE];
+    let mut size = 0;
+
+    while let Ok(read) = file.read(&mut buffer) {
+        if read == 0 {
+            break;
+        }
+
+        if let Some(contents) = contents.as_mut() {
+            contents.extend_from_slice(&buffer[..read.min(max_size - size)]);
+        }
+
+        size += read;
+        if size > max_size {
+            return false;
+        }
+    }
+
+    true
+}
+
+/// Writes the given buffer into the file, overwriting any data that was
+/// previously there. Returns the number of bytes written, or [None] on error.
+/// Calling this function on the browser process UI or IO threads is not allowed.
+pub fn write_file<P: AsRef<Path>>(path: P, contents: &[u8]) -> Option<usize> {
+    if !allow_file_io() {
+        return None;
+    }
+
+    let mut file = File::create(path).ok()?;
+    let mut size = 0;
+
+    while size < contents.len() {
+        let write = file.write(&contents[size..]).unwrap_or(0);
+        if write == 0 {
+            break;
+        }
+        size += write;
+    }
+
+    Some(size)
+}

examples/tests_shared/src/browser/geometry_util.rs

@@ -0,0 +1,56 @@
+use cef::*;
+
+pub const fn logical_value_to_device(value: i32, scale_factor: f32) -> i32 {
+    (value as f32 * scale_factor) as i32
+}
+
+pub const fn logical_rect_to_device(rect: Rect, scale_factor: f32) -> Rect {
+    Rect {
+        x: logical_value_to_device(rect.x, scale_factor),
+        y: logical_value_to_device(rect.y, scale_factor),
+        width: logical_value_to_device(rect.width, scale_factor),
+        height: logical_value_to_device(rect.height, scale_factor),
+    }
+}
+
+pub const fn device_value_to_logical(value: i32, scale_factor: f32) -> i32 {
+    (value as f32 / scale_factor) as i32
+}
+
+pub const fn device_rect_to_logical(rect: Rect, scale_factor: f32) -> Rect {
+    Rect {
+        x: device_value_to_logical(rect.x, scale_factor),
+        y: device_value_to_logical(rect.y, scale_factor),
+        width: device_value_to_logical(rect.width, scale_factor),
+        height: device_value_to_logical(rect.height, scale_factor),
+    }
+}
+
+pub const fn device_mouse_event_to_logical(event: MouseEvent, scale_factor: f32) -> MouseEvent {
+    MouseEvent {
+        x: device_value_to_logical(event.x, scale_factor),
+        y: device_value_to_logical(event.y, scale_factor),
+        ..event
+    }
+}
+
+pub const fn device_touch_event_to_logical(event: TouchEvent, scale_factor: f32) -> TouchEvent {
+    TouchEvent {
+        x: event.x / scale_factor,
+        y: event.y / scale_factor,
+        ..event
+    }
+}
+
+pub fn constrain_window_bounds(display: &Rect, window: &mut Rect) {
+    window.x = window.x.max(display.x);
+    window.y = window.y.max(display.y);
+    window.width = window.width.clamp(100, display.width);
+    window.height = window.height.clamp(100, display.height);
+    if window.x + window.width > display.x + display.width {
+        window.x = display.x + display.width - window.width;
+    }
+    if window.y + window.height > display.y + display.height {
+        window.y = display.y + display.height - window.height;
+    }
+}

examples/tests_shared/src/browser/main_message_loop.rs

@@ -0,0 +1,135 @@
+use cef::*;
+use std::{
+    mem,
+    sync::{Arc, Mutex, OnceLock},
+};
+
+#[cfg(target_os = "windows")]
+use windows_sys::Win32::Foundation::HWND;
+
+static INSTANCE: OnceLock<Arc<Mutex<Option<Box<dyn MainMessageLoop>>>>> = OnceLock::new();
+
+pub fn get_main_message_loop() -> Arc<Mutex<Option<Box<dyn MainMessageLoop>>>> {
+    INSTANCE.get_or_init(|| Arc::new(Mutex::new(None))).clone()
+}
+
+pub fn set_main_message_loop(
+    mut main_message_loop: Option<Box<dyn MainMessageLoop>>,
+) -> Option<Box<dyn MainMessageLoop>> {
+    let instance = get_main_message_loop();
+    let Ok(mut instance) = instance.lock() else {
+        return main_message_loop;
+    };
+    mem::swap(&mut *instance, &mut main_message_loop);
+    main_message_loop
+}
+
+pub fn currently_on_main_thread() -> bool {
+    let instance = get_main_message_loop();
+    let Ok(instance) = instance.lock() else {
+        return false;
+    };
+    let Some(instance) = instance.as_ref() else {
+        return false;
+    };
+    instance.run_tasks_on_current_thread()
+}
+
+pub fn main_post_task(task: Option<&mut Task>) {
+    let instance = get_main_message_loop();
+    let Ok(mut instance) = instance.lock() else {
+        return;
+    };
+    let Some(instance) = instance.as_mut() else {
+        return;
+    };
+    instance.post_task(task);
+}
+
+pub fn main_post_once(closure: Box<dyn Send + FnOnce()>) {
+    let instance = get_main_message_loop();
+    let Ok(mut instance) = instance.lock() else {
+        return;
+    };
+    let Some(instance) = instance.as_mut() else {
+        return;
+    };
+    instance.post_once(closure);
+}
+
+pub fn main_post_repeating(closure: Box<dyn Send + FnMut()>) {
+    let instance = get_main_message_loop();
+    let Ok(mut instance) = instance.lock() else {
+        return;
+    };
+    let Some(instance) = instance.as_mut() else {
+        return;
+    };
+    instance.post_repeating(closure);
+}
+
+wrap_task! {
+    struct OnceClosure {
+        closure: Arc<Mutex<Option<Box<dyn Send + FnOnce()>>>>,
+    }
+
+    impl Task {
+        fn execute(&self) {
+            let Ok(mut closure) = self.closure.lock() else {
+                return;
+            };
+            let Some(closure) = closure.take() else {
+                return;
+            };
+            closure();
+        }
+    }
+}
+
+wrap_task! {
+    struct RepeatingClosure {
+        closure: Arc<Mutex<Option<Box<dyn Send + FnMut()>>>>,
+    }
+
+    impl Task {
+        fn execute(&self) {
+            let Ok(mut closure) = self.closure.lock() else {
+                return;
+            };
+            let Some(closure) = closure.as_mut() else {
+                return;
+            };
+            closure();
+        }
+    }
+}
+
+pub trait MainMessageLoop: Send {
+    /// Run the message loop. The thread that this method is called on will be considered the main
+    /// thread. This blocks until [MainMessageLoop::quit] is called.
+    fn run(&mut self) -> i32;
+
+    /// Quit the message loop.
+    fn quit(&mut self);
+
+    /// Post a task for execution on the main message loop.
+    fn post_task(&mut self, task: Option<&mut Task>);
+
+    /// Returns true if this message loop runs tasks on the current thread.
+    fn run_tasks_on_current_thread(&self) -> bool;
+
+    #[cfg(target_os = "windows")]
+    fn set_current_modeless_dialog(&mut self, hwnd: HWND);
+
+    /// Post a closure for execution on the main message loop.
+    fn post_once(&mut self, closure: Box<dyn Send + FnOnce()>) {
+        let mut task = OnceClosure::new(Arc::new(Mutex::new(Some(closure))));
+        self.post_task(Some(&mut task));
+    }
+
+    /// Post a closure for execution on the main message loop.
+    fn post_repeating(&mut self, closure: Box<dyn Send + FnMut()>) {
+        let mut task = RepeatingClosure::new(Arc::new(Mutex::new(Some(closure))));
+        self.post_task(Some(&mut task));
+    }
+}

examples/tests_shared/src/browser/main_message_loop_external_pump/linux.rs

@@ -0,0 +1,243 @@
+use super::*;
+use glib::*;
+use std::{
+    io::{self, Read, Write},
+    os::fd::AsRawFd,
+    sync::{Arc, Mutex, Weak},
+    thread,
+};
+
+/// Return a timeout suitable for the glib loop, -1 to block forever,
+/// 0 to return right away, or a timeout in milliseconds from now.
+fn get_time_interval_milliseconds(cef_time: &cef::Time) -> i32 {
+    let mut time = 0.0;
+    time_to_doublet(Some(cef_time), Some(&mut time));
+    if time == 0.0 {
+        return -1;
+    }
+
+    let mut cef_now = Default::default();
+    time_now(Some(&mut cef_now));
+    let mut now = 0.0;
+    time_to_doublet(Some(&cef_now), Some(&mut now));
+
+    // Be careful here. CefTime has a precision of microseconds, but we want a
+    // value in milliseconds. If there are 5.5ms left, should the delay be 5 or
+    // 6?  It should be 6 to avoid executing delayed work too early.
+    let interval = (time - now).ceil() * 1000.0;
+    let interval = interval as i32;
+
+    // If this value is negative, then we need to run delayed work soon.
+    interval.max(0)
+}
+
+fn handle_eintr<T>(mut callback: impl FnMut() -> io::Result<T>) -> io::Result<T> {
+    loop {
+        match callback() {
+            Err(err) if err.kind() == io::ErrorKind::Interrupted => continue,
+            result => break result,
+        }
+    }
+}
+
+pub struct MainMessageLoopExternalPumpInner {
+    should_quit: bool,
+    main_context: MainContext,
+    work_source: Source,
+    timer_source: Option<Source>,
+    delayed_work_time: Arc<Mutex<Option<cef::Time>>>,
+    wakeup_pipe_write: io::PipeWriter,
+}
+
+impl Drop for MainMessageLoopExternalPumpInner {
+    fn drop(&mut self) {
+        self.work_source.destroy();
+    }
+}
+
+impl MainMessageLoopExternalPumpInner {
+    pub fn new(pump: &Weak<Mutex<MainMessageLoopExternalPump>>) -> Self {
+        let (mut wakeup_pipe_read, wakeup_pipe_write) =
+            io::pipe().expect("Failed to create wakeup pipe");
+        let delayed_work_time = Arc::new(Mutex::new(None));
+        let main_context = MainContext::default();
+        let work_source = {
+            let pump = pump.clone();
+            let delayed_work_time = delayed_work_time.clone();
+            unix_fd_source_new(
+                wakeup_pipe_read.as_raw_fd(),
+                IOCondition::IN,
+                None,
+                Priority::DEFAULT_IDLE,
+                move |raw_fd, condition| {
+                    let Some(pump) = pump.upgrade() else {
+                        return ControlFlow::Break;
+                    };
+                    let Ok(mut pump) = pump.lock() else {
+                        return ControlFlow::Break;
+                    };
+
+                    // We usually have a single message on the wakeup pipe, since we are only
+                    // signaled when the queue went from empty to non-empty, but there can be
+                    // two messages if a task posted a task, hence we read at most two bytes.
+                    // The glib poll will tell us whether there was data, so this read shouldn't
+                    // block.
+                    if condition.contains(IOCondition::IN) {
+                        assert_eq!(wakeup_pipe_read.as_raw_fd(), raw_fd);
+
+                        let mut buffer = [0; 16];
+                        let size = handle_eintr(|| wakeup_pipe_read.read(&mut buffer))
+                            .expect("Error reading from the wakeup pipe.");
+
+                        match size {
+                            16 => {
+                                let mut delay_ms = [0; 8];
+                                delay_ms.copy_from_slice(&buffer[..8]);
+                                pump.on_schedule_work(i64::from_ne_bytes(delay_ms));
+                                delay_ms.copy_from_slice(&buffer[8..]);
+                                pump.on_schedule_work(i64::from_ne_bytes(delay_ms));
+                            }
+                            8..16 => {
+                                let mut delay_ms = [0; 8];
+                                delay_ms.copy_from_slice(&buffer[..8]);
+                                pump.on_schedule_work(i64::from_ne_bytes(delay_ms));
+                            }
+                            _ => {}
+                        }
+                    }
+
+                    if let Ok(delayed_work_time) = delayed_work_time.lock() {
+                        let delay = delayed_work_time
+                            .as_ref()
+                            .map(get_time_interval_milliseconds)
+                            .unwrap_or_default();
+
+                        if delay == 0 {
+                            // The timer has expired. That condition will stay true until we process
+                            // that delayed work, so we don't need to record this differently.
+                            pump.on_timer_timeout();
+                        }
+                    }
+
+                    ControlFlow::Continue
+                },
+            )
+        };
+        work_source.attach(Some(&main_context));
+
+        Self {
+            should_quit: false,
+            main_context,
+            work_source,
+            timer_source: None,
+            delayed_work_time,
+            wakeup_pipe_write,
+        }
+    }
+
+    pub fn on_run(&mut self) -> bool {
+        // We really only do a single task for each iteration of the loop. If we
+        // have done something, assume there is likely something more to do. This
+        // will mean that we don't block on the message pump until there was nothing
+        // more to do. We also set this to true to make sure not to block on the
+        // first iteration of the loop.
+        let mut more_work_is_plausible = true;
+
+        // We run our own loop instead of using g_main_loop_quit in one of the
+        // callbacks. This is so we only quit our own loops, and we don't quit
+        // nested loops run by others.
+        loop {
+            // Don't block if we think we have more work to do.
+            let block = !more_work_is_plausible;
+
+            more_work_is_plausible = self.main_context.iteration(block);
+            if self.should_quit {
+                break;
+            }
+        }
+
+        // We need to run the message pump until it is idle. However we don't have
+        // that information here so we run the message loop "for a while".
+        for _ in 0..10 {
+            // Do some work.
+            do_message_loop_work();
+
+            // Sleep to allow the CEF proc to do work.
+            thread::sleep(Duration::from_micros(50000));
+        }
+
+        false
+    }
+
+    pub fn on_quit(&mut self) {
+        self.should_quit = true;
+    }
+
+    pub fn on_schedule_message_pump_work(&mut self, delay: i64) {
+        let buffer = delay.to_ne_bytes();
+        let size = handle_eintr(|| self.wakeup_pipe_write.write(&buffer)).unwrap_or_default();
+        assert_eq!(
+            size, 8,
+            "Could not write to the UI message loop wakeup pipe!"
+        );
+    }
+
+    pub fn set_timer(&mut self, delay: i64) {
+        assert!(delay > 0);
+
+        let mut delayed_work_time = self
+            .delayed_work_time
+            .lock()
+            .expect("Failed to lock delayed_work_time member");
+
+        let mut cef_now = Default::default();
+        time_now(Some(&mut cef_now));
+        let mut now = 0.0;
+        time_to_doublet(Some(&cef_now), Some(&mut now));
+
+        let time = now + delay as f64 / 1000.0;
+        let mut cef_time = Default::default();
+        if time_from_doublet(time, Some(&mut cef_time)) == 0 {
+            panic!("Failed to convert time to CEF time");
+        }
+
+        *delayed_work_time = Some(cef_time);
+
+        if let Some(timer_source) = self.timer_source.take() {
+            self.work_source.remove_child_source(&timer_source);
+        }
+
+        let timer_source = timeout_source_new(
+            Duration::from_millis(delay.max(0).unsigned_abs()),
+            None,
+            Priority::DEFAULT_IDLE,
+            || ControlFlow::Continue,
+        );
+        self.work_source.add_child_source(&timer_source);
+    }
+
+    pub fn kill_timer(&mut self) {
+        let mut delayed_work_time = self
+            .delayed_work_time
+            .lock()
+            .expect("Failed to lock delayed_work_time member");
+
+        *delayed_work_time = None;
+
+        if let Some(timer_source) = self.timer_source.take() {
+            self.work_source.remove_child_source(&timer_source);
+        }
+    }
+
+    pub fn is_timer_pending(&self) -> bool {
+        let delayed_work_time = self
+            .delayed_work_time
+            .lock()
+            .expect("Failed to lock delayed_work_time member");
+        let delay = delayed_work_time
+            .as_ref()
+            .map(get_time_interval_milliseconds)
+            .unwrap_or_default();
+        delay > 0
+    }
+}

examples/tests_shared/src/browser/main_message_loop_external_pump/mac.rs

@@ -0,0 +1,135 @@
+use super::*;
+use objc2::{define_class, msg_send, rc::Retained, sel, AnyThread, DefinedClass};
+use objc2_app_kit::{NSApp, NSEventTrackingRunLoopMode};
+use objc2_foundation::{
+    MainThreadMarker, NSNumber, NSObject, NSObjectNSThreadPerformAdditions, NSObjectProtocol,
+    NSRunLoop, NSRunLoopCommonModes, NSThread, NSTimer,
+};
+use std::sync::{Mutex, Weak};
+
+define_class! {
+    #[unsafe(super(NSObject))]
+    #[ivars = Weak<Mutex<MainMessageLoopExternalPump>>]
+    struct EventHandler;
+
+    impl EventHandler {
+        #[unsafe(method(scheduleWork:))]
+        fn schedule_work(&self, delay_ms: &NSNumber) {
+            let Ok(delay_ms) = i64::try_from(delay_ms.integerValue()) else {
+                return;
+            };
+
+            let Some(pump) = self.ivars().upgrade() else {
+                return;
+            };
+            let Ok(mut pump) = pump.lock() else {
+                return;
+            };
+
+            pump.on_schedule_work(delay_ms);
+        }
+
+        #[unsafe(method(timerTimeout:))]
+        fn timer_timeout(&self, _: &NSTimer) {
+            let Some(pump) = self.ivars().upgrade() else {
+                return;
+            };
+            let Ok(mut pump) = pump.lock() else {
+                return;
+            };
+
+            pump.on_timer_timeout();
+        }
+    }
+
+    unsafe impl NSObjectProtocol for EventHandler {}
+}
+
+impl EventHandler {
+    fn new(pump: Weak<Mutex<MainMessageLoopExternalPump>>) -> Retained<Self> {
+        let this = Self::alloc().set_ivars(pump);
+        unsafe { msg_send![super(this), init] }
+    }
+}
+
+pub struct MainMessageLoopExternalPumpInner {
+    owner_thread: Retained<NSThread>,
+    timer: Option<Retained<NSTimer>>,
+    event_handler: Retained<EventHandler>,
+}
+
+unsafe impl Send for MainMessageLoopExternalPumpInner {}
+
+impl MainMessageLoopExternalPumpInner {
+    pub fn new(pump: &Weak<Mutex<MainMessageLoopExternalPump>>) -> Self {
+        let event_handler = EventHandler::new(pump.clone());
+        Self {
+            owner_thread: NSThread::currentThread(),
+            timer: None,
+            event_handler,
+        }
+    }
+
+    pub fn on_run(&mut self) -> bool {
+        let Some(mtm) = MainThreadMarker::new() else {
+            return false;
+        };
+        NSApp(mtm).run();
+        true
+    }
+
+    pub fn on_quit(&mut self) {
+        let Some(mtm) = MainThreadMarker::new() else {
+            return;
+        };
+        NSApp(mtm).stop(None);
+    }
+
+    pub fn on_schedule_message_pump_work(&mut self, delay: i64) {
+        // This method may be called on any thread.
+        let delay = isize::try_from(delay).unwrap_or(isize::MAX);
+        let number = NSNumber::numberWithInteger(delay);
+        unsafe {
+            self.event_handler
+                .performSelector_onThread_withObject_waitUntilDone(
+                    sel!(scheduleWork:),
+                    &self.owner_thread,
+                    Some(&number),
+                    false,
+                );
+        }
+    }
+
+    pub fn set_timer(&mut self, delay: i64) {
+        let delay_s = delay as f64 / 1000.0;
+        let timer = unsafe {
+            NSTimer::timerWithTimeInterval_target_selector_userInfo_repeats(
+                delay_s,
+                &self.event_handler,
+                sel!(timerTimeout:),
+                None,
+                false,
+            )
+        };
+
+        // Add the timer to default and tracking runloop modes.
+        let owner_runloop = NSRunLoop::currentRunLoop();
+        unsafe {
+            owner_runloop.addTimer_forMode(&timer, NSRunLoopCommonModes);
+            owner_runloop.addTimer_forMode(&timer, NSEventTrackingRunLoopMode);
+        }
+
+        self.timer = Some(timer);
+    }
+
+    pub fn kill_timer(&mut self) {
+        let Some(timer) = self.timer.take() else {
+            return;
+        };
+        timer.invalidate();
+    }
+
+    pub fn is_timer_pending(&self) -> bool {
+        self.timer.is_some()
+    }
+}

examples/tests_shared/src/browser/main_message_loop_external_pump/mod.rs

@@ -0,0 +1,218 @@
+use super::{main_message_loop::*, main_message_loop_std::*};
+use cef::*;
+use std::{
+    sync::{Arc, Mutex, OnceLock, Weak},
+    time::Duration,
+};
+#[cfg(target_os = "windows")]
+use windows_sys::Win32::Foundation::HWND;
+
+#[cfg(target_os = "windows")]
+mod win;
+#[cfg(target_os = "windows")]
+use win::MainMessageLoopExternalPumpInner;
+
+#[cfg(target_os = "macos")]
+mod mac;
+#[cfg(target_os = "macos")]
+use mac::MainMessageLoopExternalPumpInner;
+
+#[cfg(target_os = "linux")]
+mod linux;
+#[cfg(target_os = "linux")]
+use linux::MainMessageLoopExternalPumpInner;
+
+/// Special timer delay placeholder value. Intentionally 32-bit for Windows and
+/// OS X platform API compatibility.
+const TIMER_DELAY_PLACEHOLDER: i32 = i32::MAX;
+
+// The maximum number of milliseconds we're willing to wait between calls to
+// [MainMessageLoopExternalPump::do_work].
+const MAX_TIMER_DELAY: i64 = 1000 / 30; // 30fps
+
+static INSTANCE: OnceLock<Weak<Mutex<MainMessageLoopExternalPump>>> = OnceLock::new();
+
+pub fn get_main_message_loop() -> Option<Arc<Mutex<MainMessageLoopExternalPump>>> {
+    INSTANCE.get()?.upgrade()
+}
+
+pub fn set_main_message_loop(
+    main_message_loop: Option<Arc<Mutex<MainMessageLoopExternalPump>>>,
+) -> Option<Arc<Mutex<MainMessageLoopExternalPump>>> {
+    let main_message_loop = main_message_loop
+        .as_ref()
+        .map(Arc::downgrade)
+        .unwrap_or_default();
+    if let Err(instance) = INSTANCE.set(main_message_loop) {
+        instance.upgrade()
+    } else {
+        None
+    }
+}
+
+pub struct MainMessageLoopExternalPump {
+    standard_message_loop: Arc<Mutex<Option<Box<dyn MainMessageLoop>>>>,
+    is_active: bool,
+    reentrancy_detected: bool,
+    inner: MainMessageLoopExternalPumpInner,
+}
+
+impl MainMessageLoopExternalPump {
+    pub fn new() -> Arc<Mutex<Self>> {
+        let external_pump = Arc::new_cyclic(|weak_ref| {
+            Mutex::new(Self {
+                standard_message_loop: MainMessageLoopStd::new(),
+                is_active: false,
+                reentrancy_detected: false,
+                inner: MainMessageLoopExternalPumpInner::new(weak_ref),
+            })
+        });
+        set_main_message_loop(Some(external_pump.clone()));
+        external_pump
+    }
+
+    /// Called from [BrowserProcessHandler::on_schedule_message_pump_work] on any thread.
+    /// The platform subclass must implement this method and schedule a call to
+    /// [MainMessageLoopExternalPump::on_schedule_work] on the main application thread.
+    pub fn on_schedule_message_pump_work(&mut self, delay: i64) {
+        self.inner.on_schedule_message_pump_work(delay);
+    }
+
+    fn on_schedule_work(&mut self, delay: i64) {
+        assert!(currently_on_main_thread());
+
+        if delay == i64::from(TIMER_DELAY_PLACEHOLDER) && self.is_timer_pending() {
+            // Don't set the maximum timer requested from DoWork() if a timer event is
+            // currently pending.
+            return;
+        }
+
+        self.kill_timer();
+
+        let delay = if delay <= 0 {
+            // Execute the work immediately.
+            self.do_work();
+            0
+        } else {
+            // Never wait longer than the maximum allowed time.
+            delay.min(MAX_TIMER_DELAY)
+        };
+
+        // Results in call to on_timer_timeout after the specified delay.
+        self.set_timer(delay);
+    }
+
+    fn on_timer_timeout(&mut self) {
+        assert!(currently_on_main_thread());
+        self.kill_timer();
+        self.do_work();
+    }
+
+    /// Control the pending work timer in the platform subclass. Only called on
+    /// the main application thread.
+    fn set_timer(&mut self, delay: i64) {
+        assert!(!self.is_timer_pending());
+        assert!(delay > 0);
+        self.inner.set_timer(delay);
+    }
+
+    /// Control the pending work timer in the platform subclass. Only called on
+    /// the main application thread.
+    fn kill_timer(&mut self) {
+        self.inner.kill_timer();
+    }
+
+    /// Control the pending work timer in the platform subclass. Only called on
+    /// the main application thread.
+    fn is_timer_pending(&self) -> bool {
+        self.inner.is_timer_pending()
+    }
+
+    /// Handle work processing.
+    fn do_work(&mut self) {
+        let was_reentrant = self.perform_message_loop_work();
+        if was_reentrant {
+            self.on_schedule_message_pump_work(0);
+        } else if !self.is_timer_pending() {
+            self.on_schedule_message_pump_work(i64::from(TIMER_DELAY_PLACEHOLDER));
+        }
+    }
+
+    fn perform_message_loop_work(&mut self) -> bool {
+        if self.is_active {
+            // When do_message_loop_work is called there may be various callbacks
+            // (such as paint and IPC messages) that result in additional calls to this
+            // method. If re-entrancy is detected we must repost a request again to the
+            // owner thread to ensure that the discarded call is executed in the future.
+            self.reentrancy_detected = true;
+            return false;
+        }
+
+        self.reentrancy_detected = false;
+
+        self.is_active = true;
+        do_message_loop_work();
+        self.is_active = false;
+
+        // `reentrancy_detected` may have changed due to re-entrant calls to this
+        // method.
+        self.reentrancy_detected
+    }
+}
+
+impl MainMessageLoop for MainMessageLoopExternalPump {
+    fn run(&mut self) -> i32 {
+        if !self.inner.on_run() {
+            return 0;
+        }
+
+        self.kill_timer();
+
+        // We need to run the message pump until it is idle. However we don't have
+        // that information here so we run the message loop "for a while".
+        for _ in 0..10 {
+            // Do some work.
+            do_message_loop_work();
+
+            // Sleep to allow the CEF proc to do work.
+            std::thread::sleep(Duration::from_millis(50));
+        }
+
+        0
+    }
+
+    fn quit(&mut self) {
+        self.inner.on_quit();
+    }
+
+    fn post_task(&mut self, task: Option<&mut Task>) {
+        let Ok(mut standard_message_loop) = self.standard_message_loop.lock() else {
+            return;
+        };
+        let Some(standard_message_loop) = standard_message_loop.as_mut() else {
+            return;
+        };
+        standard_message_loop.post_task(task);
+    }
+
+    fn run_tasks_on_current_thread(&self) -> bool {
+        let Ok(standard_message_loop) = self.standard_message_loop.lock() else {
+            return false;
+        };
+        let Some(standard_message_loop) = standard_message_loop.as_ref() else {
+            return false;
+        };
+        standard_message_loop.run_tasks_on_current_thread()
+    }
+
+    #[cfg(target_os = "windows")]
+    fn set_current_modeless_dialog(&mut self, hwnd: HWND) {
+        let Ok(mut standard_message_loop) = self.standard_message_loop.lock() else {
+            return;
+        };
+        let Some(standard_message_loop) = standard_message_loop.as_mut() else {
+            return;
+        };
+        standard_message_loop.set_current_modeless_dialog(hwnd);
+    }
+}

examples/tests_shared/src/browser/main_message_loop_external_pump/win.rs

@@ -0,0 +1,145 @@
+use super::*;
+use crate::browser::util_win::*;
+use std::{
+    mem, ptr,
+    sync::{Mutex, Weak},
+};
+use windows_sys::{w, Win32::Foundation::*, Win32::UI::WindowsAndMessaging::*};
+
+const MSG_HAVE_WORK: u32 = WM_USER + 1;
+
+pub struct MainMessageLoopExternalPumpInner {
+    timer_pending: bool,
+    main_thread_target: Option<usize>,
+}
+
+impl MainMessageLoopExternalPumpInner {
+    pub fn new(pump: &Weak<Mutex<MainMessageLoopExternalPump>>) -> Self {
+        let main_thread_target = {
+            const WINDOW_CLASS_NAME: *const u16 = w!("MainMessageLoopExternalPump");
+
+            let instance = get_code_module_handle();
+            unsafe {
+                let wcex = WNDCLASSEXW {
+                    cbSize: mem::size_of::<WNDCLASSEXW>() as u32,
+                    lpfnWndProc: Some(Self::window_proc),
+                    hInstance: instance,
+                    lpszClassName: WINDOW_CLASS_NAME,
+                    ..mem::zeroed()
+                };
+                RegisterClassExW(&wcex);
+
+                // Create the message handling window.
+                let main_thread_target = CreateWindowExW(
+                    0,
+                    WINDOW_CLASS_NAME,
+                    ptr::null(),
+                    WS_OVERLAPPEDWINDOW,
+                    0,
+                    0,
+                    0,
+                    0,
+                    HWND_MESSAGE,
+                    ptr::null_mut(),
+                    instance,
+                    ptr::null(),
+                );
+                assert!(!main_thread_target.is_null());
+                main_thread_target
+            }
+        };
+
+        set_user_data(main_thread_target, Some(pump.clone()));
+
+        Self {
+            timer_pending: false,
+            main_thread_target: Some(main_thread_target as usize),
+        }
+    }
+
+    unsafe extern "system" fn window_proc(
+        hwnd: HWND,
+        message: u32,
+        wparam: WPARAM,
+        lparam: LPARAM,
+    ) -> LRESULT {
+        match message {
+            MSG_HAVE_WORK | WM_TIMER => {
+                if let Some(message_loop) =
+                    get_user_data::<Weak<Mutex<MainMessageLoopExternalPump>>>(hwnd)
+                {
+                    if let Some(message_loop) = message_loop.upgrade() {
+                        if let Ok(mut message_loop) = message_loop.lock() {
+                            if message == MSG_HAVE_WORK {
+                                let delay = lparam as i64;
+                                message_loop.on_schedule_work(delay);
+                            } else {
+                                message_loop.on_timer_timeout();
+                            }
+                        }
+                    }
+                }
+            }
+            WM_DESTROY => {
+                let _ = set_user_data::<Weak<Mutex<MainMessageLoopExternalPump>>>(hwnd, None);
+            }
+            _ => {}
+        }
+        DefWindowProcW(hwnd, message, wparam, lparam)
+    }
+
+    pub fn on_run(&mut self) -> bool {
+        let mut msg = Default::default();
+        unsafe {
+            while GetMessageW(&mut msg, ptr::null_mut(), 0, 0) != 0 {
+                TranslateMessage(&msg);
+                DispatchMessageW(&msg);
+            }
+        }
+        true
+    }
+
+    pub fn on_quit(&mut self) {
+        unsafe {
+            PostMessageW(ptr::null_mut(), WM_QUIT, 0, 0);
+        }
+    }
+
+    pub fn on_schedule_message_pump_work(&mut self, delay: i64) {
+        // This method may be called on any thread.
+        unsafe {
+            if let Some(main_thread_target) = self.main_thread_target {
+                PostMessageW(
+                    main_thread_target as HWND,
+                    MSG_HAVE_WORK,
+                    0,
+                    delay as LPARAM,
+                );
+            }
+        }
+    }
+
+    pub fn set_timer(&mut self, delay: i64) {
+        self.timer_pending = true;
+        if let Some(main_thread_target) = self.main_thread_target {
+            unsafe {
+                SetTimer(main_thread_target as HWND, 1, delay as u32, None);
+            }
+        }
+    }
+
+    pub fn kill_timer(&mut self) {
+        if self.timer_pending {
+            if let Some(main_thread_target) = self.main_thread_target {
+                unsafe {
+                    KillTimer(main_thread_target as HWND, 1);
+                }
+            }
+            self.timer_pending = false;
+        }
+    }
+
+    pub fn is_timer_pending(&self) -> bool {
+        self.timer_pending
+    }
+}

examples/tests_shared/src/browser/main_message_loop_std.rs

@@ -0,0 +1,46 @@
+use super::main_message_loop::*;
+use cef::*;
+use std::sync::{Arc, Mutex};
+
+#[cfg(target_os = "windows")]
+use windows_sys::Win32::Foundation::HWND;
+
+pub struct MainMessageLoopStd;
+
+impl MainMessageLoopStd {
+    pub fn new() -> Arc<Mutex<Option<Box<dyn MainMessageLoop>>>> {
+        set_main_message_loop(Some(Box::new(MainMessageLoopStd)));
+        get_main_message_loop()
+    }
+}
+
+impl Drop for MainMessageLoopStd {
+    fn drop(&mut self) {
+        set_main_message_loop(None);
+    }
+}
+
+impl MainMessageLoop for MainMessageLoopStd {
+    fn run(&mut self) -> i32 {
+        run_message_loop();
+        0
+    }
+
+    fn quit(&mut self) {
+        quit_message_loop();
+    }
+
+    fn post_task(&mut self, task: Option<&mut Task>) {
+        post_task(ThreadId::UI, task);
+    }
+
+    fn run_tasks_on_current_thread(&self) -> bool {
+        currently_on(ThreadId::UI) != 0
+    }
+
+    #[cfg(target_os = "windows")]
+    fn set_current_modeless_dialog(&mut self, _hwnd: HWND) {
+        // Nothing to do here. The Chromium message loop implementation will internally route
+        // dialog messages.
+    }
+}

examples/tests_shared/src/browser/mod.rs

@@ -0,0 +1,10 @@
+pub mod client_app_browser;
+pub mod file_util;
+pub mod geometry_util;
+pub mod main_message_loop;
+pub mod main_message_loop_external_pump;
+pub mod main_message_loop_std;
+pub mod resource_util;
+
+#[cfg(target_os = "windows")]
+pub mod util_win;

examples/tests_shared/src/browser/resource_util/mod.rs

@@ -0,0 +1,9 @@
+#[cfg(target_os = "windows")]
+pub mod win;
+#[cfg(target_os = "windows")]
+pub use win::*;
+
+#[cfg(not(target_os = "windows"))]
+pub mod posix;
+#[cfg(not(target_os = "windows"))]
+pub use posix::*;

examples/tests_shared/src/browser/resource_util/posix.rs

@@ -0,0 +1,42 @@
+use cef::*;
+use std::{fs::File, io::Read, path::PathBuf};
+
+pub fn get_resource_directory() -> Option<PathBuf> {
+    let mut path = std::env::current_exe().ok()?;
+
+    // Pop the executable file name.
+    path.pop();
+
+    #[cfg(target_os = "macos")]
+    {
+        // Pop the MacOS directory.
+        path.pop();
+        path.push("Resources");
+    }
+
+    #[cfg(target_os = "linux")]
+    {
+        path.push("files");
+    }
+
+    Some(path)
+}
+
+pub fn load_binary_resource(resource_name: &str) -> Option<Vec<u8>> {
+    let path = get_resource_directory()?.join(resource_name);
+    let mut file = File::open(path).ok()?;
+    let mut data = Vec::new();
+    file.read_to_end(&mut data).ok()?;
+    Some(data)
+}
+
+pub fn get_binary_resource_reader(resource_name: &str) -> Option<StreamReader> {
+    let path = get_resource_directory()?.join(resource_name);
+    if !path.exists() {
+        return None;
+    }
+
+    let path = path.to_str()?;
+    let path = CefString::from(path);
+    stream_reader_create_for_file(Some(&CefString::from(path)))
+}

examples/tests_shared/src/browser/resource_util/win.rs

@@ -0,0 +1,124 @@
+use crate::browser::util_win::*;
+use cef::{
+    wrapper::{byte_read_handler::*, resource_manager::*, stream_resource_handler::*},
+    *,
+};
+use std::{
+    mem,
+    sync::{Arc, Mutex, OnceLock},
+};
+use windows_sys::Win32::System::LibraryLoader::{
+    FindResourceW, LoadResource, LockResource, SizeofResource,
+};
+
+pub type GetResourceId = Box<dyn Send + Sync + Fn(&str) -> u16>;
+
+static INSTANCE: OnceLock<Arc<Mutex<Option<GetResourceId>>>> = OnceLock::new();
+
+pub fn get_fn_get_resource_id() -> Arc<Mutex<Option<GetResourceId>>> {
+    INSTANCE.get_or_init(|| Arc::new(Mutex::new(None))).clone()
+}
+
+pub fn set_fn_get_resource_id(mut get_resource_id: Option<GetResourceId>) -> Option<GetResourceId> {
+    let instance = get_fn_get_resource_id();
+    let Ok(mut instance) = instance.lock() else {
+        return get_resource_id;
+    };
+    mem::swap(&mut *instance, &mut get_resource_id);
+    get_resource_id
+}
+
+pub fn load_binary_resource(resource_name: &str) -> Option<Vec<u8>> {
+    let get_resource_id = get_fn_get_resource_id();
+    let get_resource_id = get_resource_id.lock().ok()?;
+    let get_resource_id = get_resource_id.as_ref()?;
+
+    let resource_id = (*get_resource_id)(resource_name);
+    let instance = get_code_module_handle();
+
+    unsafe {
+        // Defined in https://github.com/chromiumembedded/cef/blob/master/tests/cefclient/browser/resource.h
+        const RT_BINARY: u16 = 256;
+
+        let resource = FindResourceW(
+            instance,
+            resource_id as usize as *const _,
+            RT_BINARY as usize as *const _,
+        );
+        if resource.is_null() {
+            return None;
+        }
+
+        let data = LoadResource(instance, resource);
+        if data.is_null() {
+            return None;
+        }
+
+        let size = SizeofResource(instance, resource);
+        if size == 0 {
+            return None;
+        }
+
+        let ptr = LockResource(data);
+        if ptr.is_null() {
+            return None;
+        }
+
+        Some(std::slice::from_raw_parts(ptr as *const u8, size as usize).to_vec())
+    }
+}
+
+pub fn get_binary_resource_reader(resource_name: &str) -> Option<StreamReader> {
+    let data = load_binary_resource(resource_name)?;
+    let stream = ByteStream::new(data);
+    let mut handler = ByteReadHandler::new(Arc::new(Mutex::new(stream)));
+    stream_reader_create_for_handler(Some(&mut handler))
+}
+
+struct BinaryResourceProvider {
+    url_path: String,
+    resource_path_prefix: String,
+}
+
+impl BinaryResourceProvider {
+    fn new(url_path: &str, resource_path_prefix: &str) -> Self {
+        Self {
+            url_path: normalize_url_path(url_path),
+            resource_path_prefix: normalize_url_path(resource_path_prefix),
+        }
+    }
+}
+
+impl ResourceManagerProvider for BinaryResourceProvider {
+    fn on_request(&self, request: Arc<Mutex<ResourceManagerRequest>>) -> bool {
+        assert_ne!(
+            currently_on(ThreadId::IO),
+            0,
+            "on_request must be called on the IO thread"
+        );
+
+        let Ok(mut request) = request.lock() else {
+            return false;
+        };
+        let url = request.url();
+        let Some(relative_path) = url.strip_prefix(self.url_path.as_str()) else {
+            // Not handled by this provider.
+            return false;
+        };
+
+        let mime_type = request.mime_type_resolver()(url);
+        let relative_path = format!("{}/{relative_path}", self.resource_path_prefix);
+        let handler = get_binary_resource_reader(&relative_path)
+            .map(|stream| StreamResourceHandler::new_with_stream(mime_type, stream));
+
+        request.continue_request(handler);
+        true
+    }
+}
+
+pub fn create_binary_resource_provider(
+    url_path: &str,
+    resource_path_prefix: &str,
+) -> Box<dyn ResourceManagerProvider> {
+    Box::new(BinaryResourceProvider::new(url_path, resource_path_prefix))
+}

examples/tests_shared/src/browser/util_win.rs

@@ -0,0 +1,256 @@
+use std::{ffi::c_void, mem, ptr, sync::OnceLock};
+use windows_sys::Win32::{
+    Foundation::*,
+    Graphics::Gdi::*,
+    System::{
+        LibraryLoader::{
+            GetModuleHandleExW, GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS,
+            GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT,
+        },
+        Performance::*,
+        SystemServices::*,
+    },
+    UI::{Input::KeyboardAndMouse::*, WindowsAndMessaging::*},
+};
+
+pub fn get_time_now() -> u64 {
+    static FREQUENCY: OnceLock<f64> = OnceLock::new();
+
+    let frequency = FREQUENCY.get_or_init(|| {
+        let mut frequency = 0;
+        unsafe { QueryPerformanceFrequency(&mut frequency) };
+        frequency.max(1) as f64 / 1000000.0
+    });
+
+    let mut current_time = 0;
+    unsafe { QueryPerformanceCounter(&mut current_time) };
+    ((current_time as f64 / *frequency) as i64).max(0) as u64
+}
+
+pub fn set_user_data_ptr(hwnd: HWND, data: *mut c_void) -> *mut c_void {
+    unsafe {
+        SetLastError(ERROR_SUCCESS);
+        let result = SetWindowLongPtrW(hwnd, GWLP_USERDATA, data as isize);
+        assert!(result != 0 || GetLastError() == ERROR_SUCCESS);
+        result as *mut _
+    }
+}
+
+pub fn set_user_data<T>(hwnd: HWND, data: Option<T>) -> Option<Box<T>> {
+    let ptr: *mut T = set_user_data_ptr(
+        hwnd,
+        data.map(|data| Box::into_raw(Box::new(data)).cast())
+            .unwrap_or(ptr::null_mut()),
+    )
+    .cast();
+    if ptr.is_null() {
+        None
+    } else {
+        unsafe { Some(Box::from_raw(ptr)) }
+    }
+}
+
+pub fn get_user_data<'a, T>(hwnd: HWND) -> Option<&'a mut T> {
+    unsafe {
+        let ptr = GetWindowLongPtrW(hwnd, GWLP_USERDATA) as *mut T;
+        ptr.as_mut()
+    }
+}
+
+pub fn set_window_proc_ptr(hwnd: HWND, proc: WNDPROC) -> WNDPROC {
+    Some(unsafe {
+        let old = GetWindowLongPtrW(hwnd, GWLP_WNDPROC);
+        assert_ne!(old, 0);
+        if let Some(proc) = proc {
+            let result = SetWindowLongPtrW(hwnd, GWLP_WNDPROC, mem::transmute(proc));
+            assert!(result != 0 || GetLastError() == ERROR_SUCCESS);
+        }
+        mem::transmute(old)
+    })
+}
+
+#[repr(i32)]
+#[derive(Default, Debug)]
+pub enum EventFlag {
+    #[default]
+    None = 0,
+    CapsLockOn = 1 << 0,
+    ShiftDown = 1 << 1,
+    ControlDown = 1 << 2,
+    AltDown = 1 << 3,
+    LeftMouseButton = 1 << 4,
+    MiddleMouseButton = 1 << 5,
+    RightMouseButton = 1 << 6,
+    CommandDown = 1 << 7,
+    NumLockOn = 1 << 8,
+    IsKeyPad = 1 << 9,
+    IsLeft = 1 << 10,
+    IsRight = 1 << 11,
+    AltGrDown = 1 << 12,
+    IsRepeat = 1 << 13,
+    PrecisionScrollingDelta = 1 << 14,
+    ScrollByPage = 1 << 15,
+}
+
+pub fn get_resource_string(id: u32) -> String {
+    let mut buffer = [0u16; 100];
+    String::from_utf16_lossy(unsafe {
+        let len = LoadStringW(
+            get_code_module_handle(),
+            id,
+            buffer.as_mut_ptr(),
+            buffer.len() as i32,
+        ) as usize;
+        &buffer[..len]
+    })
+}
+
+pub fn get_cef_mouse_modifiers(wparam: WPARAM) -> i32 {
+    let mut modifiers = 0;
+
+    if wparam & MK_CONTROL as usize != 0 {
+        modifiers |= EventFlag::ControlDown as i32;
+    }
+    if wparam & MK_SHIFT as usize != 0 {
+        modifiers |= EventFlag::ShiftDown as i32;
+    }
+    if is_key_down(VK_MENU as _) {
+        modifiers |= EventFlag::AltDown as i32;
+    }
+    if wparam & MK_LBUTTON as usize != 0 {
+        modifiers |= EventFlag::LeftMouseButton as i32;
+    }
+    if wparam & MK_MBUTTON as usize != 0 {
+        modifiers |= EventFlag::MiddleMouseButton as i32;
+    }
+    if wparam & MK_RBUTTON as usize != 0 {
+        modifiers |= EventFlag::RightMouseButton as i32;
+    }
+
+    // Low bit set from GetKeyState indicates "toggled".
+    unsafe {
+        if GetKeyState(VK_NUMLOCK as i32) & 1 != 0 {
+            modifiers |= EventFlag::NumLockOn as i32;
+        }
+        if GetKeyState(VK_CAPITAL as i32) & 1 != 0 {
+            modifiers |= EventFlag::CapsLockOn as i32;
+        }
+    }
+
+    modifiers
+}
+
+pub fn get_cef_keyboard_modifiers(wparam: WPARAM, lparam: LPARAM) -> i32 {
+    let mut modifiers = 0;
+
+    if is_key_down(VK_SHIFT as _) {
+        modifiers |= EventFlag::ShiftDown as i32;
+    }
+    if is_key_down(VK_CONTROL as _) {
+        modifiers |= EventFlag::ControlDown as i32;
+    }
+    if is_key_down(VK_MENU as _) {
+        modifiers |= EventFlag::AltDown as i32;
+    }
+
+    // Low bit set from GetKeyState indicates "toggled".
+    unsafe {
+        if GetKeyState(VK_NUMLOCK as i32) & 1 != 0 {
+            modifiers |= EventFlag::NumLockOn as i32;
+        }
+        if GetKeyState(VK_CAPITAL as i32) & 1 != 0 {
+            modifiers |= EventFlag::CapsLockOn as i32;
+        }
+    }
+
+    match wparam as VIRTUAL_KEY {
+        VK_RETURN => {
+            if (lparam >> 16) & KF_EXTENDED as isize != 0 {
+                modifiers |= EventFlag::IsKeyPad as i32;
+            }
+        }
+        VK_INSERT | VK_DELETE | VK_HOME | VK_END | VK_PRIOR | VK_NEXT | VK_UP | VK_DOWN
+        | VK_LEFT | VK_RIGHT => {
+            if (lparam >> 16) & KF_EXTENDED as isize == 0 {
+                modifiers |= EventFlag::IsKeyPad as i32;
+            }
+        }
+        VK_NUMLOCK | VK_NUMPAD0 | VK_NUMPAD1 | VK_NUMPAD2 | VK_NUMPAD3 | VK_NUMPAD4
+        | VK_NUMPAD5 | VK_NUMPAD6 | VK_NUMPAD7 | VK_NUMPAD8 | VK_NUMPAD9 | VK_DIVIDE
+        | VK_MULTIPLY | VK_SUBTRACT | VK_ADD | VK_DECIMAL | VK_CLEAR => {
+            modifiers |= EventFlag::IsKeyPad as i32;
+        }
+        VK_SHIFT => {
+            if is_key_down(VK_LSHIFT as _) {
+                modifiers |= EventFlag::IsLeft as i32;
+            } else if is_key_down(VK_RSHIFT as _) {
+                modifiers |= EventFlag::IsRight as i32;
+            }
+        }
+        VK_CONTROL => {
+            if is_key_down(VK_LCONTROL as _) {
+                modifiers |= EventFlag::IsLeft as i32;
+            } else if is_key_down(VK_RCONTROL as _) {
+                modifiers |= EventFlag::IsRight as i32;
+            }
+        }
+        VK_MENU => {
+            if is_key_down(VK_LMENU as _) {
+                modifiers |= EventFlag::IsLeft as i32;
+            } else if is_key_down(VK_RMENU as _) {
+                modifiers |= EventFlag::IsRight as i32;
+            }
+        }
+        VK_LWIN => {
+            modifiers |= EventFlag::IsLeft as i32;
+        }
+        VK_RWIN => {
+            modifiers |= EventFlag::IsRight as i32;
+        }
+        _ => {}
+    }
+
+    modifiers
+}
+
+pub fn is_key_down(wparam: WPARAM) -> bool {
+    unsafe {
+        let key_state = GetKeyState(wparam as i32) as u16;
+        key_state & 0x8000 != 0
+    }
+}
+
+pub fn get_device_scale_factor() -> f32 {
+    static SCALE_FACTOR: OnceLock<f32> = OnceLock::new();
+
+    *SCALE_FACTOR.get_or_init(|| unsafe {
+        let screen_dc = GetDC(ptr::null_mut());
+        let dpi_x = GetDeviceCaps(screen_dc, LOGPIXELSX as i32);
+        ReleaseDC(ptr::null_mut(), screen_dc);
+        dpi_x as f32 / 96.0
+    })
+}
+
+pub fn get_code_module_handle() -> HINSTANCE {
+    let mut module: HMODULE = ptr::null_mut();
+    unsafe {
+        let result = GetModuleHandleExW(
+            GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS | GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT,
+            get_code_module_handle as *const _,
+            &mut module,
+        );
+        assert_ne!(result, 0);
+    }
+    module
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_get_time_now() {
+        let time = get_time_now();
+        assert!(time > 0);
+    }
+}

examples/tests_shared/src/common/binary_value_utils.rs

@@ -0,0 +1,147 @@
+use cef::*;
+use std::{
+    fmt::Debug,
+    sync::OnceLock,
+    time::{Duration, Instant},
+};
+
+pub const TEST_SEND_PROCESS_MESSAGE: &[u8] = b"testSendProcessMessage";
+pub const TEST_SEND_SMR_PROCESS_MESSAGE: &[u8] = b"testSendSMRProcessMessage";
+
+#[derive(Debug)]
+pub struct MessageId {
+    pub id: u32,
+}
+
+impl From<u32> for MessageId {
+    fn from(id: u32) -> Self {
+        Self { id }
+    }
+}
+
+impl From<&[u8]> for MessageId {
+    fn from(bytes: &[u8]) -> Self {
+        assert_eq!(bytes.len(), 4);
+        let mut id = [0; 4];
+        id.copy_from_slice(bytes);
+        Self::from(u32::from_ne_bytes(id))
+    }
+}
+
+impl From<&MessageId> for [u8; 4] {
+    fn from(id: &MessageId) -> Self {
+        id.id.to_ne_bytes()
+    }
+}
+
+pub struct ElapsedMicros {
+    duration: u128,
+}
+
+impl ElapsedMicros {
+    pub fn now() -> Self {
+        static START_TIME: OnceLock<Instant> = OnceLock::new();
+        let start_time = START_TIME.get_or_init(Instant::now);
+
+        Self {
+            duration: start_time.elapsed().as_micros(),
+        }
+    }
+}
+
+impl From<&[u8]> for ElapsedMicros {
+    fn from(bytes: &[u8]) -> Self {
+        assert_eq!(bytes.len(), 16);
+        let mut duration = [0; 16];
+        duration.copy_from_slice(bytes);
+        Self {
+            duration: u128::from_ne_bytes(duration),
+        }
+    }
+}
+
+impl From<&ElapsedMicros> for [u8; 16] {
+    fn from(elapsed: &ElapsedMicros) -> Self {
+        elapsed.duration.to_ne_bytes()
+    }
+}
+
+impl Debug for ElapsedMicros {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        let duration = u64::try_from(self.duration).unwrap_or(u64::MAX);
+        let duration = Duration::from_micros(duration);
+        write!(f, "{duration:?}")
+    }
+}
+
+#[derive(Debug)]
+pub struct BrowserMessage {
+    pub test_id: MessageId,
+    pub start_time: ElapsedMicros,
+}
+
+impl From<&BinaryValue> for BrowserMessage {
+    fn from(message: &BinaryValue) -> Self {
+        assert_eq!(message.size(), 20);
+
+        let mut data = vec![0; message.size()];
+        message.data(Some(&mut data), 0);
+
+        Self {
+            test_id: MessageId::from(&data[0..4]),
+            start_time: ElapsedMicros::from(&data[4..20]),
+        }
+    }
+}
+
+impl From<&BrowserMessage> for Option<BinaryValue> {
+    fn from(message: &BrowserMessage) -> Self {
+        let mut data = vec![0; 20];
+
+        let test_id: [u8; 4] = (&message.test_id).into();
+        let start_time: [u8; 16] = (&message.start_time).into();
+
+        data[0..4].copy_from_slice(&test_id);
+        data[4..20].copy_from_slice(&start_time);
+
+        binary_value_create(Some(&data))
+    }
+}
+
+#[derive(Debug)]
+pub struct RendererMessage {
+    pub test_id: MessageId,
+    pub duration: ElapsedMicros,
+    pub start_time: ElapsedMicros,
+}
+
+impl From<&BinaryValue> for RendererMessage {
+    fn from(message: &BinaryValue) -> Self {
+        assert_eq!(message.size(), 36);
+
+        let mut data = vec![0; message.size()];
+        message.data(Some(&mut data), 0);
+
+        Self {
+            test_id: MessageId::from(&data[0..4]),
+            duration: ElapsedMicros::from(&data[4..20]),
+            start_time: ElapsedMicros::from(&data[20..36]),
+        }
+    }
+}
+
+impl From<&RendererMessage> for Option<BinaryValue> {
+    fn from(message: &RendererMessage) -> Self {
+        let mut data = vec![0; 36];
+
+        let test_id: [u8; 4] = (&message.test_id).into();
+        let duration: [u8; 16] = (&message.duration).into();
+        let start_time: [u8; 16] = (&message.start_time).into();
+
+        data[0..4].copy_from_slice(&test_id);
+        data[4..20].copy_from_slice(&duration);
+        data[20..36].copy_from_slice(&start_time);
+
+        binary_value_create(Some(&data))
+    }
+}

examples/tests_shared/src/common/client_app.rs

@@ -0,0 +1,66 @@
+use cef::*;
+
+pub const PROCESS_TYPE: &str = "type";
+pub const RENDERER_PROCESS: &str = "renderer";
+#[cfg(target_os = "linux")]
+pub const ZYGOTE_PROCESS: &str = "zygote";
+
+pub enum ProcessType {
+    Browser,
+    Renderer,
+    #[cfg(target_os = "linux")]
+    Zygote,
+    Other,
+}
+
+impl From<&CommandLine> for ProcessType {
+    fn from(value: &CommandLine) -> Self {
+        let process_type = CefString::from(PROCESS_TYPE);
+        if value.has_switch(Some(&process_type)) == 0 {
+            return Self::Browser;
+        }
+
+        let value = CefString::from(&value.switch_value(Some(&process_type))).to_string();
+        match value.as_str() {
+            RENDERER_PROCESS => Self::Renderer,
+            #[cfg(target_os = "linux")]
+            ZYGOTE_PROCESS => Self::Zygote,
+            _ => Self::Other,
+        }
+    }
+}
+
+#[derive(Clone)]
+pub struct ClientAppCustomScheme {
+    name: String,
+    options: i32,
+}
+
+impl ClientAppCustomScheme {
+    pub fn new(name: &str, options: &[SchemeOptions]) -> Self {
+        let options = options.iter().fold(0, |acc, opt| acc | opt.get_raw()) as i32;
+        Self {
+            name: name.to_string(),
+            options,
+        }
+    }
+}
+
+wrap_app! {
+    pub struct ClientApp {
+        custom_schemes: Vec<ClientAppCustomScheme>,
+    }
+
+    impl App {
+        fn on_register_custom_schemes(&self, registrar: Option<&mut SchemeRegistrar>) {
+            let Some(registrar) = registrar else {
+                return;
+            };
+
+            for scheme in &self.custom_schemes {
+                let name = CefString::from(scheme.name.as_str());
+                registrar.add_custom_scheme(Some(&name), scheme.options);
+            }
+        }
+    }
+}

examples/tests_shared/src/common/client_app_other.rs

@@ -0,0 +1,13 @@
+use cef::*;
+
+wrap_app! {
+    pub struct ClientAppOther {
+        base: App,
+    }
+
+    impl App {
+        fn on_register_custom_schemes(&self, registrar: Option<&mut SchemeRegistrar>) {
+            self.base.on_register_custom_schemes(registrar);
+        }
+    }
+}

examples/tests_shared/src/common/client_switches.rs

@@ -0,0 +1,52 @@
+//! CEF and Chromium support a wide range of command-line switches. This file
+//! only contains command-line switches specific to the cefclient application.
+//! View CEF/Chromium documentation or search for *_switches.cc files in the
+//! Chromium source code to identify other existing command-line switches.
+
+pub const MULTI_THREADED_MESSAGE_LOOP: &str = "multi-threaded-message-loop";
+pub const EXTERNAL_MESSAGE_PUMP: &str = "external-message-pump";
+pub const CACHE_PATH: &str = "cache-path";
+pub const URL: &str = "url";
+pub const OFF_SCREEN_RENDERING_ENABLED: &str = "off-screen-rendering-enabled";
+pub const OFF_SCREEN_FRAME_RATE: &str = "off-screen-frame-rate";
+pub const TRANSPARENT_PAINTING_ENABLED: &str = "transparent-painting-enabled";
+pub const SHOW_UPDATE_RECT: &str = "show-update-rect";
+pub const FAKE_SCREEN_BOUNDS: &str = "fake-screen-bounds";
+pub const SHARED_TEXTURE_ENABLED: &str = "shared-texture-enabled";
+pub const EXTERNAL_BEGIN_FRAME_ENABLED: &str = "external-begin-frame-enabled";
+pub const MOUSE_CURSOR_CHANGE_DISABLED: &str = "mouse-cursor-change-disabled";
+pub const OFFLINE: &str = "offline";
+pub const FILTER_CHROME_COMMANDS: &str = "filter-chrome-commands";
+pub const REQUEST_CONTEXT_PER_BROWSER: &str = "request-context-per-browser";
+pub const REQUEST_CONTEXT_SHARED_CACHE: &str = "request-context-shared-cache";
+pub const BACKGROUND_COLOR: &str = "background-color";
+pub const ENABLE_GPU: &str = "enable-gpu";
+pub const FILTER_URL: &str = "filter-url";
+pub const USE_VIEWS: &str = "use-views";
+pub const USE_NATIVE: &str = "use-native";
+pub const HIDE_FRAME: &str = "hide-frame";
+pub const HIDE_CONTROLS: &str = "hide-controls";
+pub const HIDE_OVERLAYS: &str = "hide-overlays";
+pub const ALWAYS_ON_TOP: &str = "always-on-top";
+pub const HIDE_TOP_MENU: &str = "hide-top-menu";
+pub const SSL_CLIENT_CERTIFICATE: &str = "ssl-client-certificate";
+pub const CRL_SETS_PATH: &str = "crl-sets-path";
+pub const NO_ACTIVATE: &str = "no-activate";
+pub const SHOW_CHROME_TOOLBAR: &str = "show-chrome-toolbar";
+pub const INITIAL_SHOW_STATE: &str = "initial-show-state";
+pub const USE_DEFAULT_POPUP: &str = "use-default-popup";
+pub const USE_CLIENT_DIALOGS: &str = "use-client-dialogs";
+pub const USE_TEST_HTTP_SERVER: &str = "use-test-http-server";
+pub const SHOW_WINDOW_BUTTONS: &str = "show-window-buttons";
+pub const USE_WINDOW_MODAL_DIALOG: &str = "use-window-modal-dialog";
+pub const USE_BOTTOM_CONTROLS: &str = "use-bottom-controls";
+pub const HIDE_PIP_FRAME: &str = "hide-pip-frame";
+pub const MOVE_PIP_ENABLED: &str = "move-pip-enabled";
+pub const HIDE_CHROME_BUBBLES: &str = "hide-chrome-bubbles";
+pub const HIDE_WINDOW_ON_CLOSE: &str = "hide-window-on-close";
+pub const ACCEPTS_FIRST_MOUSE: &str = "accepts-first-mouse";
+pub const USE_ALLOY_STYLE: &str = "use-alloy-style";
+pub const USE_CHROME_STYLE_WINDOW: &str = "use-chrome-style-window";
+pub const SHOW_OVERLAY_BROWSER: &str = "show-overlay-browser";
+pub const USE_ANGLE: &str = "use-angle";
+pub const OZONE_PLATFORM: &str = "ozone-platform";

examples/tests_shared/src/common/mod.rs

@@ -0,0 +1,4 @@
+pub mod binary_value_utils;
+pub mod client_app;
+pub mod client_app_other;
+pub mod client_switches;

examples/tests_shared/src/lib.rs

@@ -0,0 +1,6 @@
+pub mod browser;
+pub mod common;
+pub mod renderer;
+
+#[cfg(target_os = "macos")]
+pub mod process_helper_mac;

examples/tests_shared/src/process_helper_mac.rs

@@ -0,0 +1,44 @@
+use crate::{
+    common::{client_app::*, client_app_other::*},
+    renderer::client_app_renderer::*,
+};
+use cef::{args::Args, *};
+
+pub fn run_main(
+    args: Args,
+    custom_schemes: Vec<ClientAppCustomScheme>,
+    app_renderer_delegates: Vec<Box<dyn Delegate>>,
+) -> Result<(), i32> {
+    #[cfg(feature = "sandbox")]
+    let _sandbox = {
+        let mut sandbox = cef::sandbox::Sandbox::new();
+        sandbox.initialize(args.as_main_args());
+        sandbox
+    };
+
+    let _loader = {
+        let loader = library_loader::LibraryLoader::new(&std::env::current_exe().unwrap(), true);
+        assert!(loader.load());
+        loader
+    };
+
+    let _ = api_hash(sys::CEF_API_VERSION_LAST, 0);
+
+    let app = ClientApp::new(custom_schemes);
+    let mut app = match args.as_cmd_line().map(|cmd| ProcessType::from(&cmd)) {
+        Some(ProcessType::Renderer) => {
+            let app_renderer = ClientAppRenderer::new(app_renderer_delegates);
+            ClientAppRendererApp::new(app, app_renderer)
+        }
+        _ => ClientAppOther::new(app),
+    };
+
+    match execute_process(
+        Some(args.as_main_args()),
+        Some(&mut app),
+        std::ptr::null_mut(),
+    ) {
+        0 => Ok(()),
+        err => Err(err),
+    }
+}

examples/tests_shared/src/renderer/client_app_renderer.rs

@@ -0,0 +1,255 @@
+use cef::*;
+use std::sync::Arc;
+
+pub trait Delegate: Send {
+    fn on_web_kit_initialized(&self, _app: &Arc<ClientAppRenderer>) {}
+
+    fn on_browser_created(
+        &self,
+        _app: &Arc<ClientAppRenderer>,
+        _browser: Option<&Browser>,
+        _extra_info: Option<&DictionaryValue>,
+    ) {
+    }
+
+    fn on_browser_destroyed(&self, _app: &Arc<ClientAppRenderer>, _browser: Option<&Browser>) {}
+
+    fn load_handler(&self, _app: &Arc<ClientAppRenderer>) -> Option<LoadHandler> {
+        None
+    }
+
+    fn on_context_created(
+        &self,
+        _app: &Arc<ClientAppRenderer>,
+        _browser: Option<&Browser>,
+        _frame: Option<&Frame>,
+        _context: Option<&V8Context>,
+    ) {
+    }
+
+    fn on_context_released(
+        &self,
+        _app: &Arc<ClientAppRenderer>,
+        _browser: Option<&Browser>,
+        _frame: Option<&Frame>,
+        _context: Option<&V8Context>,
+    ) {
+    }
+
+    fn on_uncaught_exception(
+        &self,
+        _app: &Arc<ClientAppRenderer>,
+        _browser: Option<&Browser>,
+        _frame: Option<&Frame>,
+        _context: Option<&V8Context>,
+        _exception: Option<&V8Exception>,
+        _stack_trace: Option<&V8StackTrace>,
+    ) {
+    }
+
+    fn on_focused_node_changed(
+        &self,
+        _app: &Arc<ClientAppRenderer>,
+        _browser: Option<&Browser>,
+        _frame: Option<&Frame>,
+        _node: Option<&Domnode>,
+    ) {
+    }
+
+    fn on_process_message_received(
+        &self,
+        _app: &Arc<ClientAppRenderer>,
+        _browser: Option<&Browser>,
+        _frame: Option<&Frame>,
+        _source_process: ProcessId,
+        _message: Option<&ProcessMessage>,
+    ) -> i32 {
+        0
+    }
+}
+
+pub struct ClientAppRenderer {
+    delegates: Vec<Box<dyn Delegate>>,
+}
+
+impl ClientAppRenderer {
+    pub fn new(delegates: Vec<Box<dyn Delegate>>) -> Arc<Self> {
+        Arc::new(Self { delegates })
+    }
+
+    pub fn delegates(&self) -> &[Box<dyn Delegate>] {
+        &self.delegates
+    }
+}
+
+wrap_render_process_handler! {
+    struct ClientAppRendererRenderProcessHandler {
+        client_app_renderer: Arc<ClientAppRenderer>,
+    }
+
+    impl RenderProcessHandler {
+        fn on_web_kit_initialized(&self) {
+            for delegate in self.client_app_renderer.delegates() {
+                delegate.on_web_kit_initialized(&self.client_app_renderer);
+            }
+        }
+
+        fn on_browser_created(
+            &self,
+            browser: Option<&mut Browser>,
+            extra_info: Option<&mut DictionaryValue>,
+        ) {
+            let browser = browser.cloned();
+            let extra_info = extra_info.cloned();
+            for delegate in self.client_app_renderer.delegates() {
+                delegate.on_browser_created(
+                    &self.client_app_renderer,
+                    browser.as_ref(),
+                    extra_info.as_ref(),
+                );
+            }
+        }
+
+        fn on_browser_destroyed(&self, browser: Option<&mut Browser>) {
+            let browser = browser.cloned();
+            for delegate in self.client_app_renderer.delegates() {
+                delegate.on_browser_destroyed(&self.client_app_renderer, browser.as_ref());
+            }
+        }
+
+        fn load_handler(&self) -> Option<LoadHandler> {
+            for delegate in self.client_app_renderer.delegates() {
+                if let Some(load_handler) = delegate.load_handler(&self.client_app_renderer) {
+                    return Some(load_handler);
+                }
+            }
+            None
+        }
+
+        fn on_context_created(
+            &self,
+            browser: Option<&mut Browser>,
+            frame: Option<&mut Frame>,
+            context: Option<&mut V8Context>,
+        ) {
+            let browser = browser.cloned();
+            let frame = frame.cloned();
+            let context = context.cloned();
+            for delegate in self.client_app_renderer.delegates() {
+                delegate.on_context_created(
+                    &self.client_app_renderer,
+                    browser.as_ref(),
+                    frame.as_ref(),
+                    context.as_ref(),
+                );
+            }
+        }
+
+        fn on_context_released(
+            &self,
+            browser: Option<&mut Browser>,
+            frame: Option<&mut Frame>,
+            context: Option<&mut V8Context>,
+        ) {
+            let browser = browser.cloned();
+            let frame = frame.cloned();
+            let context = context.cloned();
+            for delegate in self.client_app_renderer.delegates() {
+                delegate.on_context_released(
+                    &self.client_app_renderer,
+                    browser.as_ref(),
+                    frame.as_ref(),
+                    context.as_ref(),
+                );
+            }
+        }
+
+        fn on_uncaught_exception(
+            &self,
+            browser: Option<&mut Browser>,
+            frame: Option<&mut Frame>,
+            context: Option<&mut V8Context>,
+            exception: Option<&mut V8Exception>,
+            stack_trace: Option<&mut V8StackTrace>,
+        ) {
+            let browser = browser.cloned();
+            let frame = frame.cloned();
+            let context = context.cloned();
+            let exception = exception.cloned();
+            let stack_trace = stack_trace.cloned();
+            for delegate in self.client_app_renderer.delegates() {
+                delegate.on_uncaught_exception(
+                    &self.client_app_renderer,
+                    browser.as_ref(),
+                    frame.as_ref(),
+                    context.as_ref(),
+                    exception.as_ref(),
+                    stack_trace.as_ref(),
+                );
+            }
+        }
+
+        fn on_focused_node_changed(
+            &self,
+            browser: Option<&mut Browser>,
+            frame: Option<&mut Frame>,
+            node: Option<&mut Domnode>,
+        ) {
+            let browser = browser.cloned();
+            let frame = frame.cloned();
+            let node = node.cloned();
+            for delegate in self.client_app_renderer.delegates() {
+                delegate.on_focused_node_changed(
+                    &self.client_app_renderer,
+                    browser.as_ref(),
+                    frame.as_ref(),
+                    node.as_ref(),
+                );
+            }
+        }
+
+        fn on_process_message_received(
+            &self,
+            browser: Option<&mut Browser>,
+            frame: Option<&mut Frame>,
+            source_process: ProcessId,
+            message: Option<&mut ProcessMessage>,
+        ) -> i32 {
+            let browser = browser.cloned();
+            let frame = frame.cloned();
+            let message = message.cloned();
+            for delegate in self.client_app_renderer.delegates() {
+                let handled = delegate.on_process_message_received(
+                    &self.client_app_renderer,
+                    browser.as_ref(),
+                    frame.as_ref(),
+                    source_process,
+                    message.as_ref(),
+                );
+                if handled != 0 {
+                    return handled;
+                }
+            }
+            0
+        }
+    }
+}
+
+wrap_app! {
+    pub struct ClientAppRendererApp {
+        base: App,
+        client_app_renderer: Arc<ClientAppRenderer>,
+    }
+
+    impl App {
+        fn on_register_custom_schemes(&self, registrar: Option<&mut SchemeRegistrar>) {
+            self.base.on_register_custom_schemes(registrar);
+        }
+
+        fn render_process_handler(&self) -> Option<RenderProcessHandler> {
+            Some(ClientAppRendererRenderProcessHandler::new(
+                self.client_app_renderer.clone(),
+            ))
+        }
+    }
+}

examples/tests_shared/src/renderer/mod.rs

@@ -0,0 +1 @@
+pub mod client_app_renderer;

export-cef-dir/src/main.rs

@@ -19,7 +19,7 @@ fn default_version() -> &'static str {
 fn default_download_url() -> &'static str {
     static DEFAULT_DOWNLOAD_URL: OnceLock<String> = OnceLock::new();
     DEFAULT_DOWNLOAD_URL
-        .get_or_init(|| download_cef::default_download_url())
+        .get_or_init(download_cef::default_download_url)
         .as_str()
 }
 

get-latest/src/main.rs

@@ -44,7 +44,7 @@ type Result<T> = std::result::Result<T, Error>;
 fn default_download_url() -> &'static str {
     static DEFAULT_DOWNLOAD_URL: OnceLock<String> = OnceLock::new();
     DEFAULT_DOWNLOAD_URL
-        .get_or_init(|| download_cef::default_download_url())
+        .get_or_init(download_cef::default_download_url)
         .as_str()
 }
 

update-bindings/src/main.rs

@@ -41,7 +41,7 @@ fn default_version() -> &'static str {
 fn default_download_url() -> &'static str {
     static DEFAULT_DOWNLOAD_URL: OnceLock<String> = OnceLock::new();
     DEFAULT_DOWNLOAD_URL
-        .get_or_init(|| download_cef::default_download_url())
+        .get_or_init(download_cef::default_download_url)
         .as_str()
 }
 

update-bindings/src/parse_tree.rs

@@ -2720,6 +2720,7 @@ fn make_my_struct() -> {rust_name} {{
                         $($generic_type: $first_generic_type_bound $(+ $generic_type_bound)*,)+
                     )?
                     {
+                        #[allow(clippy::new_ret_no_self)]
                         pub fn new($($field_name: $field_type),*) -> #rust_name {
                             #rust_name::new(
                                 Self {