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gecko-dev/widget/nsBaseWidget.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsBaseWidget.h"
#include <utility>
#include "GLConsts.h"
#include "InputData.h"
#include "LiveResizeListener.h"
#include "SwipeTracker.h"
#include "TouchEvents.h"
#include "X11UndefineNone.h"
#include "base/thread.h"
#include "mozilla/ArrayUtils.h"
#include "mozilla/Attributes.h"
#include "mozilla/GlobalKeyListener.h"
#include "mozilla/IMEStateManager.h"
#include "mozilla/Logging.h"
#include "mozilla/MouseEvents.h"
#include "mozilla/NativeKeyBindingsType.h"
#include "mozilla/Preferences.h"
#include "mozilla/PresShell.h"
#include "mozilla/ScopeExit.h"
#include "mozilla/Sprintf.h"
#include "mozilla/StaticPrefs_apz.h"
#include "mozilla/StaticPrefs_dom.h"
#include "mozilla/StaticPrefs_gfx.h"
#include "mozilla/StaticPrefs_layers.h"
#include "mozilla/StaticPrefs_layout.h"
#include "mozilla/TextEventDispatcher.h"
#include "mozilla/TextEventDispatcherListener.h"
#include "mozilla/UniquePtr.h"
#include "mozilla/Unused.h"
#include "mozilla/VsyncDispatcher.h"
#include "mozilla/dom/BrowserParent.h"
#include "mozilla/dom/ContentChild.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/SimpleGestureEventBinding.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/gfx/GPUProcessManager.h"
#include "mozilla/gfx/gfxVars.h"
#include "mozilla/layers/APZCCallbackHelper.h"
#include "mozilla/layers/TouchActionHelper.h"
#include "mozilla/layers/APZEventState.h"
#include "mozilla/layers/APZInputBridge.h"
#include "mozilla/layers/APZThreadUtils.h"
#include "mozilla/layers/ChromeProcessController.h"
#include "mozilla/layers/Compositor.h"
#include "mozilla/layers/CompositorBridgeChild.h"
#include "mozilla/layers/CompositorBridgeParent.h"
#include "mozilla/layers/CompositorOptions.h"
#include "mozilla/layers/IAPZCTreeManager.h"
#include "mozilla/layers/ImageBridgeChild.h"
#include "mozilla/layers/InputAPZContext.h"
#include "mozilla/layers/WebRenderLayerManager.h"
#include "mozilla/webrender/WebRenderTypes.h"
#include "mozilla/widget/ScreenManager.h"
#include "nsAppDirectoryServiceDefs.h"
#include "nsCOMPtr.h"
#include "nsContentUtils.h"
#include "nsDeviceContext.h"
#include "nsGfxCIID.h"
#include "nsIAppWindow.h"
#include "nsIBaseWindow.h"
#include "nsIContent.h"
#include "nsIScreenManager.h"
#include "nsISimpleEnumerator.h"
#include "nsIWidgetListener.h"
#include "nsRefPtrHashtable.h"
#include "nsServiceManagerUtils.h"
#include "nsWidgetsCID.h"
#include "nsXULPopupManager.h"
#include "prdtoa.h"
#include "prenv.h"
#ifdef ACCESSIBILITY
# include "nsAccessibilityService.h"
#endif
#include "gfxConfig.h"
#include "gfxUtils.h" // for ToDeviceColor
#include "mozilla/layers/CompositorSession.h"
#include "VRManagerChild.h"
#include "gfxConfig.h"
#include "nsView.h"
#include "nsViewManager.h"
static mozilla::LazyLogModule sBaseWidgetLog("BaseWidget");
#ifdef DEBUG
# include "nsIObserver.h"
static void debug_RegisterPrefCallbacks();
#endif
#ifdef NOISY_WIDGET_LEAKS
static int32_t gNumWidgets;
#endif
using namespace mozilla::dom;
using namespace mozilla::layers;
using namespace mozilla::ipc;
using namespace mozilla::widget;
using namespace mozilla;
// Async pump timer during injected long touch taps
#define TOUCH_INJECT_PUMP_TIMER_MSEC 50
#define TOUCH_INJECT_LONG_TAP_DEFAULT_MSEC 1500
int32_t nsIWidget::sPointerIdCounter = 0;
// Some statics from nsIWidget.h
/*static*/
uint64_t AutoObserverNotifier::sObserverId = 0;
/*static*/ nsTHashMap<uint64_t, nsCOMPtr<nsIObserver>>
AutoObserverNotifier::sSavedObservers;
// The maximum amount of time to let the EnableDragDrop runnable wait in the
// idle queue before timing out and moving it to the regular queue. Value is in
// milliseconds.
const uint32_t kAsyncDragDropTimeout = 1000;
NS_IMPL_ISUPPORTS(nsBaseWidget, nsIWidget, nsISupportsWeakReference)
//-------------------------------------------------------------------------
//
// nsBaseWidget constructor
//
//-------------------------------------------------------------------------
nsBaseWidget::nsBaseWidget() : nsBaseWidget(BorderStyle::None) {}
nsBaseWidget::nsBaseWidget(BorderStyle aBorderStyle)
: mWidgetListener(nullptr),
mAttachedWidgetListener(nullptr),
mPreviouslyAttachedWidgetListener(nullptr),
mCompositorVsyncDispatcher(nullptr),
mBorderStyle(aBorderStyle),
mBounds(0, 0, 0, 0),
mIsTiled(false),
mPopupLevel(PopupLevel::Top),
mPopupType(PopupType::Any),
mHasRemoteContent(false),
mUpdateCursor(true),
mUseAttachedEvents(false),
mIMEHasFocus(false),
mIMEHasQuit(false),
mIsFullyOccluded(false),
mNeedFastSnaphot(false),
mCurrentPanGestureBelongsToSwipe(false),
mIsPIPWindow(false) {
#ifdef NOISY_WIDGET_LEAKS
gNumWidgets++;
printf("WIDGETS+ = %d\n", gNumWidgets);
#endif
#ifdef DEBUG
debug_RegisterPrefCallbacks();
#endif
mShutdownObserver = new WidgetShutdownObserver(this);
}
NS_IMPL_ISUPPORTS(WidgetShutdownObserver, nsIObserver)
WidgetShutdownObserver::WidgetShutdownObserver(nsBaseWidget* aWidget)
: mWidget(aWidget), mRegistered(false) {
Register();
}
WidgetShutdownObserver::~WidgetShutdownObserver() {
// No need to call Unregister(), we can't be destroyed until nsBaseWidget
// gets torn down. The observer service and nsBaseWidget have a ref on us
// so nsBaseWidget has to call Unregister and then clear its ref.
}
NS_IMETHODIMP
WidgetShutdownObserver::Observe(nsISupports* aSubject, const char* aTopic,
const char16_t* aData) {
if (!mWidget) {
return NS_OK;
}
if (!strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID)) {
RefPtr<nsBaseWidget> widget(mWidget);
widget->Shutdown();
} else if (!strcmp(aTopic, "quit-application")) {
RefPtr<nsBaseWidget> widget(mWidget);
widget->QuitIME();
}
return NS_OK;
}
void WidgetShutdownObserver::Register() {
if (!mRegistered) {
mRegistered = true;
nsContentUtils::RegisterShutdownObserver(this);
#ifndef MOZ_WIDGET_ANDROID
// The primary purpose of observing quit-application is
// to avoid leaking a widget on Windows when nothing else
// breaks the circular reference between the widget and
// TSFTextStore. However, our Android IME code crashes if
// doing this on Android, so let's not do this on Android.
// Doing this on Gtk and Mac just in case.
nsCOMPtr<nsIObserverService> observerService =
mozilla::services::GetObserverService();
if (observerService) {
observerService->AddObserver(this, "quit-application", false);
}
#endif
}
}
void WidgetShutdownObserver::Unregister() {
if (mRegistered) {
mWidget = nullptr;
#ifndef MOZ_WIDGET_ANDROID
nsCOMPtr<nsIObserverService> observerService =
mozilla::services::GetObserverService();
if (observerService) {
observerService->RemoveObserver(this, "quit-application");
}
#endif
nsContentUtils::UnregisterShutdownObserver(this);
mRegistered = false;
}
}
#define INTL_APP_LOCALES_CHANGED "intl:app-locales-changed"
NS_IMPL_ISUPPORTS(LocalesChangedObserver, nsIObserver)
LocalesChangedObserver::LocalesChangedObserver(nsBaseWidget* aWidget)
: mWidget(aWidget), mRegistered(false) {
Register();
}
LocalesChangedObserver::~LocalesChangedObserver() {
// No need to call Unregister(), we can't be destroyed until nsBaseWidget
// gets torn down. The observer service and nsBaseWidget have a ref on us
// so nsBaseWidget has to call Unregister and then clear its ref.
}
NS_IMETHODIMP
LocalesChangedObserver::Observe(nsISupports* aSubject, const char* aTopic,
const char16_t* aData) {
if (!mWidget) {
return NS_OK;
}
if (!strcmp(aTopic, INTL_APP_LOCALES_CHANGED)) {
RefPtr<nsBaseWidget> widget(mWidget);
widget->LocalesChanged();
}
return NS_OK;
}
void LocalesChangedObserver::Register() {
if (mRegistered) {
return;
}
nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
if (obs) {
obs->AddObserver(this, INTL_APP_LOCALES_CHANGED, true);
}
// Locale might be update before registering
RefPtr<nsBaseWidget> widget(mWidget);
widget->LocalesChanged();
mRegistered = true;
}
void LocalesChangedObserver::Unregister() {
if (!mRegistered) {
return;
}
nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
if (obs) {
obs->RemoveObserver(this, INTL_APP_LOCALES_CHANGED);
}
mWidget = nullptr;
mRegistered = false;
}
void nsBaseWidget::Shutdown() {
NotifyLiveResizeStopped();
DestroyCompositor();
FreeLocalesChangedObserver();
FreeShutdownObserver();
}
void nsBaseWidget::QuitIME() {
IMEStateManager::WidgetOnQuit(this);
this->mIMEHasQuit = true;
}
void nsBaseWidget::DestroyCompositor() {
RevokeTransactionIdAllocator();
// We release this before releasing the compositor, since it may hold the
// last reference to our ClientLayerManager. ClientLayerManager's dtor can
// trigger a paint, creating a new compositor, and we don't want to re-use
// the old vsync dispatcher.
if (mCompositorVsyncDispatcher) {
MOZ_ASSERT(mCompositorVsyncDispatcherLock.get());
MutexAutoLock lock(*mCompositorVsyncDispatcherLock.get());
mCompositorVsyncDispatcher->Shutdown();
mCompositorVsyncDispatcher = nullptr;
}
// The compositor shutdown sequence looks like this:
// 1. CompositorSession calls CompositorBridgeChild::Destroy.
// 2. CompositorBridgeChild synchronously sends WillClose.
// 3. CompositorBridgeParent releases some resources (such as the layer
// manager, compositor, and widget).
// 4. CompositorBridgeChild::Destroy returns.
// 5. Asynchronously, CompositorBridgeParent::ActorDestroy will fire on the
// compositor thread when the I/O thread closes the IPC channel.
// 6. Step 5 will schedule DeferredDestroy on the compositor thread, which
// releases the reference CompositorBridgeParent holds to itself.
//
// When CompositorSession::Shutdown returns, we assume the compositor is gone
// or will be gone very soon.
if (mCompositorSession) {
ReleaseContentController();
mAPZC = nullptr;
SetCompositorWidgetDelegate(nullptr);
mCompositorBridgeChild = nullptr;
mCompositorSession->Shutdown();
mCompositorSession = nullptr;
}
}
// This prevents the layer manager from starting a new transaction during
// shutdown.
void nsBaseWidget::RevokeTransactionIdAllocator() {
if (!mWindowRenderer || !mWindowRenderer->AsWebRender()) {
return;
}
mWindowRenderer->AsWebRender()->SetTransactionIdAllocator(nullptr);
}
void nsBaseWidget::ReleaseContentController() {
if (mRootContentController) {
mRootContentController->Destroy();
mRootContentController = nullptr;
}
}
void nsBaseWidget::DestroyLayerManager() {
if (mWindowRenderer) {
mWindowRenderer->Destroy();
mWindowRenderer = nullptr;
}
DestroyCompositor();
}
void nsBaseWidget::OnRenderingDeviceReset() { DestroyLayerManager(); }
void nsBaseWidget::FreeShutdownObserver() {
if (mShutdownObserver) {
mShutdownObserver->Unregister();
}
mShutdownObserver = nullptr;
}
void nsBaseWidget::FreeLocalesChangedObserver() {
if (mLocalesChangedObserver) {
mLocalesChangedObserver->Unregister();
}
mLocalesChangedObserver = nullptr;
}
//-------------------------------------------------------------------------
//
// nsBaseWidget destructor
//
//-------------------------------------------------------------------------
nsBaseWidget::~nsBaseWidget() {
if (mSwipeTracker) {
mSwipeTracker->Destroy();
mSwipeTracker = nullptr;
}
IMEStateManager::WidgetDestroyed(this);
FreeLocalesChangedObserver();
FreeShutdownObserver();
DestroyLayerManager();
#ifdef NOISY_WIDGET_LEAKS
gNumWidgets--;
printf("WIDGETS- = %d\n", gNumWidgets);
#endif
}
//-------------------------------------------------------------------------
//
// Basic create.
//
//-------------------------------------------------------------------------
void nsBaseWidget::BaseCreate(nsIWidget* aParent, widget::InitData* aInitData) {
if (aInitData) {
mWindowType = aInitData->mWindowType;
mBorderStyle = aInitData->mBorderStyle;
mPopupLevel = aInitData->mPopupLevel;
mPopupType = aInitData->mPopupHint;
mHasRemoteContent = aInitData->mHasRemoteContent;
mIsPIPWindow = aInitData->mPIPWindow;
}
if (aParent) {
aParent->AddChild(this);
}
}
//-------------------------------------------------------------------------
//
// Accessor functions to get/set the client data
//
//-------------------------------------------------------------------------
nsIWidgetListener* nsBaseWidget::GetWidgetListener() const {
return mWidgetListener;
}
void nsBaseWidget::SetWidgetListener(nsIWidgetListener* aWidgetListener) {
mWidgetListener = aWidgetListener;
}
already_AddRefed<nsIWidget> nsBaseWidget::CreateChild(
const LayoutDeviceIntRect& aRect, widget::InitData* aInitData,
bool aForceUseIWidgetParent) {
nsIWidget* parent = this;
nsNativeWidget nativeParent = nullptr;
if (!aForceUseIWidgetParent) {
// Use only either parent or nativeParent, not both, to match
// existing code. Eventually Create() should be divested of its
// nativeWidget parameter.
nativeParent = parent ? parent->GetNativeData(NS_NATIVE_WIDGET) : nullptr;
parent = nativeParent ? nullptr : parent;
MOZ_ASSERT(!parent || !nativeParent, "messed up logic");
}
nsCOMPtr<nsIWidget> widget;
if (aInitData && aInitData->mWindowType == WindowType::Popup) {
widget = AllocateChildPopupWidget();
} else {
widget = nsIWidget::CreateChildWindow();
}
if (widget && mNeedFastSnaphot) {
widget->SetNeedFastSnaphot();
}
if (widget &&
NS_SUCCEEDED(widget->Create(parent, nativeParent, aRect, aInitData))) {
return widget.forget();
}
return nullptr;
}
// Attach a view to our widget which we'll send events to.
void nsBaseWidget::AttachViewToTopLevel(bool aUseAttachedEvents) {
NS_ASSERTION((mWindowType == WindowType::TopLevel ||
mWindowType == WindowType::Dialog ||
mWindowType == WindowType::Invisible ||
mWindowType == WindowType::Child),
"Can't attach to window of that type");
mUseAttachedEvents = aUseAttachedEvents;
}
nsIWidgetListener* nsBaseWidget::GetAttachedWidgetListener() const {
return mAttachedWidgetListener;
}
nsIWidgetListener* nsBaseWidget::GetPreviouslyAttachedWidgetListener() {
return mPreviouslyAttachedWidgetListener;
}
void nsBaseWidget::SetPreviouslyAttachedWidgetListener(
nsIWidgetListener* aListener) {
mPreviouslyAttachedWidgetListener = aListener;
}
void nsBaseWidget::SetAttachedWidgetListener(nsIWidgetListener* aListener) {
mAttachedWidgetListener = aListener;
}
//-------------------------------------------------------------------------
//
// Close this nsBaseWidget
//
//-------------------------------------------------------------------------
void nsBaseWidget::Destroy() {
DestroyCompositor();
// Just in case our parent is the only ref to us
nsCOMPtr<nsIWidget> kungFuDeathGrip(this);
// disconnect from the parent
nsIWidget* parent = GetParent();
if (parent) {
parent->RemoveChild(this);
}
}
//-------------------------------------------------------------------------
//
// Get this nsBaseWidget parent
//
//-------------------------------------------------------------------------
nsIWidget* nsBaseWidget::GetParent(void) { return nullptr; }
//-------------------------------------------------------------------------
//
// Get this nsBaseWidget top level widget
//
//-------------------------------------------------------------------------
nsIWidget* nsBaseWidget::GetTopLevelWidget() {
nsIWidget *topLevelWidget = nullptr, *widget = this;
while (widget) {
topLevelWidget = widget;
widget = widget->GetParent();
}
return topLevelWidget;
}
//-------------------------------------------------------------------------
//
// Get this nsBaseWidget's top (non-sheet) parent (if it's a sheet)
//
//-------------------------------------------------------------------------
nsIWidget* nsBaseWidget::GetSheetWindowParent(void) { return nullptr; }
float nsBaseWidget::GetDPI() { return 96.0f; }
void nsBaseWidget::NotifyAPZOfDPIChange() {
if (mAPZC) {
mAPZC->SetDPI(GetDPI());
}
}
CSSToLayoutDeviceScale nsIWidget::GetDefaultScale() {
double devPixelsPerCSSPixel = StaticPrefs::layout_css_devPixelsPerPx();
if (devPixelsPerCSSPixel <= 0.0) {
devPixelsPerCSSPixel = GetDefaultScaleInternal();
}
return CSSToLayoutDeviceScale(devPixelsPerCSSPixel);
}
nsIntSize nsIWidget::CustomCursorSize(const Cursor& aCursor) {
MOZ_ASSERT(aCursor.IsCustom());
int32_t width = 0;
int32_t height = 0;
aCursor.mContainer->GetWidth(&width);
aCursor.mContainer->GetHeight(&height);
aCursor.mResolution.ApplyTo(width, height);
return {width, height};
}
LayoutDeviceIntSize nsIWidget::ClientToWindowSizeDifference() {
auto margin = ClientToWindowMargin();
MOZ_ASSERT(margin.top >= 0, "Window should be bigger than client area");
MOZ_ASSERT(margin.left >= 0, "Window should be bigger than client area");
MOZ_ASSERT(margin.right >= 0, "Window should be bigger than client area");
MOZ_ASSERT(margin.bottom >= 0, "Window should be bigger than client area");
return {margin.LeftRight(), margin.TopBottom()};
}
RefPtr<mozilla::VsyncDispatcher> nsIWidget::GetVsyncDispatcher() {
return nullptr;
}
//-------------------------------------------------------------------------
//
// Add a child to the list of children
//
//-------------------------------------------------------------------------
void nsBaseWidget::AddChild(nsIWidget* aChild) {
MOZ_ASSERT(!aChild->GetNextSibling() && !aChild->GetPrevSibling(),
"aChild not properly removed from its old child list");
if (!mFirstChild) {
mFirstChild = mLastChild = aChild;
} else {
// append to the list
MOZ_ASSERT(mLastChild);
MOZ_ASSERT(!mLastChild->GetNextSibling());
mLastChild->SetNextSibling(aChild);
aChild->SetPrevSibling(mLastChild);
mLastChild = aChild;
}
}
//-------------------------------------------------------------------------
//
// Remove a child from the list of children
//
//-------------------------------------------------------------------------
void nsBaseWidget::RemoveChild(nsIWidget* aChild) {
#ifdef DEBUG
# ifdef XP_MACOSX
// nsCocoaWindow doesn't implement GetParent, so in that case parent will be
// null and we'll just have to do without this assertion.
nsIWidget* parent = aChild->GetParent();
NS_ASSERTION(!parent || parent == this, "Not one of our kids!");
# else
MOZ_RELEASE_ASSERT(aChild->GetParent() == this, "Not one of our kids!");
# endif
#endif
if (mLastChild == aChild) {
mLastChild = mLastChild->GetPrevSibling();
}
if (mFirstChild == aChild) {
mFirstChild = mFirstChild->GetNextSibling();
}
// Now remove from the list. Make sure that we pass ownership of the tail
// of the list correctly before we have aChild let go of it.
nsIWidget* prev = aChild->GetPrevSibling();
nsIWidget* next = aChild->GetNextSibling();
if (prev) {
prev->SetNextSibling(next);
}
if (next) {
next->SetPrevSibling(prev);
}
aChild->SetNextSibling(nullptr);
aChild->SetPrevSibling(nullptr);
}
//-------------------------------------------------------------------------
//
// Sets widget's position within its parent's child list.
//
//-------------------------------------------------------------------------
void nsBaseWidget::SetZIndex(int32_t aZIndex) {
// Hold a ref to ourselves just in case, since we're going to remove
// from our parent.
nsCOMPtr<nsIWidget> kungFuDeathGrip(this);
mZIndex = aZIndex;
// reorder this child in its parent's list.
auto* parent = static_cast<nsBaseWidget*>(GetParent());
if (parent) {
parent->RemoveChild(this);
// Scope sib outside the for loop so we can check it afterward
nsIWidget* sib = parent->GetFirstChild();
for (; sib; sib = sib->GetNextSibling()) {
int32_t childZIndex = GetZIndex();
if (aZIndex < childZIndex) {
// Insert ourselves before sib
nsIWidget* prev = sib->GetPrevSibling();
mNextSibling = sib;
mPrevSibling = prev;
sib->SetPrevSibling(this);
if (prev) {
prev->SetNextSibling(this);
} else {
NS_ASSERTION(sib == parent->mFirstChild, "Broken child list");
// We've taken ownership of sib, so it's safe to have parent let
// go of it
parent->mFirstChild = this;
}
PlaceBehind(eZPlacementBelow, sib, false);
break;
}
}
// were we added to the list?
if (!sib) {
parent->AddChild(this);
}
}
}
void nsBaseWidget::GetWorkspaceID(nsAString& workspaceID) {
workspaceID.Truncate();
}
void nsBaseWidget::MoveToWorkspace(const nsAString& workspaceID) {
// Noop.
}
//-------------------------------------------------------------------------
//
// Get this component cursor
//
//-------------------------------------------------------------------------
void nsBaseWidget::SetCursor(const Cursor& aCursor) { mCursor = aCursor; }
void nsBaseWidget::SetCustomCursorAllowed(bool aIsAllowed) {
if (aIsAllowed != mCustomCursorAllowed) {
mCustomCursorAllowed = aIsAllowed;
mUpdateCursor = true;
SetCursor(mCursor);
}
}
//-------------------------------------------------------------------------
//
// Window transparency methods
//
//-------------------------------------------------------------------------
void nsBaseWidget::SetTransparencyMode(TransparencyMode aMode) {}
TransparencyMode nsBaseWidget::GetTransparencyMode() {
return TransparencyMode::Opaque;
}
/* virtual */
void nsBaseWidget::PerformFullscreenTransition(FullscreenTransitionStage aStage,
uint16_t aDuration,
nsISupports* aData,
nsIRunnable* aCallback) {
MOZ_ASSERT_UNREACHABLE(
"Should never call PerformFullscreenTransition on nsBaseWidget");
}
//-------------------------------------------------------------------------
//
// Put the window into full-screen mode
//
//-------------------------------------------------------------------------
void nsBaseWidget::InfallibleMakeFullScreen(bool aFullScreen) {
#define MOZ_FORMAT_RECT(fmtstr) "[" fmtstr "," fmtstr " " fmtstr "x" fmtstr "]"
#define MOZ_SPLAT_RECT(rect) \
(rect).X(), (rect).Y(), (rect).Width(), (rect).Height()
// Windows which can be made fullscreen are exactly those which are located on
// the desktop, rather than being a child of some other window.
MOZ_DIAGNOSTIC_ASSERT(BoundsUseDesktopPixels(),
"non-desktop windows cannot be made fullscreen");
// Ensure that the OS chrome is hidden/shown before we resize and/or exit the
// function.
//
// HideWindowChrome() may (depending on platform, implementation details, and
// OS-level user preferences) alter the reported size of the window. The
// obvious and principled solution is socks-and-shoes:
// - On entering fullscreen mode: hide window chrome, then perform resize.
// - On leaving fullscreen mode: unperform resize, then show window chrome.
//
// ... unfortunately, HideWindowChrome() requires Resize() to be called
// afterwards (see bug 498835), which prevents this from being done in a
// straightforward way.
//
// Instead, we always call HideWindowChrome() just before we call Resize().
// This at least ensures that our measurements are consistently taken in a
// pre-transition state.
//
// ... unfortunately again, coupling HideWindowChrome() to Resize() means that
// we have to worry about the possibility of control flows that don't call
// Resize() at all. (That shouldn't happen, but it's not trivial to rule out.)
// We therefore set up a fallback to fix up the OS chrome if it hasn't been
// done at exit time.
bool hasAdjustedOSChrome = false;
const auto adjustOSChrome = [&]() {
if (hasAdjustedOSChrome) {
MOZ_ASSERT_UNREACHABLE("window chrome should only be adjusted once");
return;
}
HideWindowChrome(aFullScreen);
hasAdjustedOSChrome = true;
};
const auto adjustChromeOnScopeExit = MakeScopeExit([&]() {
if (hasAdjustedOSChrome) {
return;
}
MOZ_LOG(sBaseWidgetLog, LogLevel::Warning,
("window was not resized within InfallibleMakeFullScreen()"));
// Hide chrome and "resize" the window to its current size.
auto rect = GetBounds();
adjustOSChrome();
Resize(rect.X(), rect.Y(), rect.Width(), rect.Height(), true);
});
// Attempt to resize to `rect`.
//
// Returns the actual rectangle resized to. (This may differ from `rect`, if
// the OS is unhappy with it. See bug 1786226.)
const auto doReposition = [&](auto rect) -> void {
static_assert(std::is_base_of_v<DesktopPixel,
std::remove_reference_t<decltype(rect)>>,
"doReposition requires a rectangle using desktop pixels");
if (MOZ_LOG_TEST(sBaseWidgetLog, LogLevel::Debug)) {
const DesktopRect previousSize =
GetScreenBounds() / GetDesktopToDeviceScale();
MOZ_LOG(sBaseWidgetLog, LogLevel::Debug,
("before resize: " MOZ_FORMAT_RECT("%f"),
MOZ_SPLAT_RECT(previousSize)));
}
adjustOSChrome();
Resize(rect.X(), rect.Y(), rect.Width(), rect.Height(), true);
if (MOZ_LOG_TEST(sBaseWidgetLog, LogLevel::Warning)) {
// `rect` may have any underlying data type; coerce to float to
// simplify printf-style logging
const gfx::RectTyped<DesktopPixel, float> rectAsFloat{rect};
// The OS may have objected to the target position. That's not necessarily
// a problem -- it'll happen regularly on Macs with camera notches in the
// monitor, for instance (see bug 1786226) -- but it probably deserves to
// be called out.
//
// Since there's floating-point math involved, the actual values may be
// off by a few ulps -- as an upper bound, perhaps 8 * FLT_EPSILON *
// max(MOZ_SPLAT_RECT(rect)) -- but 0.01 should be several orders of
// magnitude bigger than that.
const auto postResizeRectRaw = GetScreenBounds();
const auto postResizeRect = postResizeRectRaw / GetDesktopToDeviceScale();
const bool succeeded = postResizeRect.WithinEpsilonOf(rectAsFloat, 0.01);
if (succeeded) {
MOZ_LOG(sBaseWidgetLog, LogLevel::Debug,
("resized to: " MOZ_FORMAT_RECT("%f"),
MOZ_SPLAT_RECT(rectAsFloat)));
} else {
MOZ_LOG(sBaseWidgetLog, LogLevel::Warning,
("attempted to resize to: " MOZ_FORMAT_RECT("%f"),
MOZ_SPLAT_RECT(rectAsFloat)));
MOZ_LOG(sBaseWidgetLog, LogLevel::Warning,
("... but ended up at: " MOZ_FORMAT_RECT("%f"),
MOZ_SPLAT_RECT(postResizeRect)));
}
MOZ_LOG(
sBaseWidgetLog, LogLevel::Verbose,
("(... which, before DPI adjustment, is:" MOZ_FORMAT_RECT("%d") ")",
MOZ_SPLAT_RECT(postResizeRectRaw)));
}
};
if (aFullScreen) {
if (!mSavedBounds) {
mSavedBounds = Some(FullscreenSavedState());
}
// save current position
mSavedBounds->windowRect = GetScreenBounds() / GetDesktopToDeviceScale();
nsCOMPtr<nsIScreen> screen = GetWidgetScreen();
if (!screen) {
return;
}
// Move to fill the screen.
doReposition(screen->GetRectDisplayPix());
// Save off the new position. (This may differ from GetRectDisplayPix(), if
// the OS was unhappy with it. See bug 1786226.)
mSavedBounds->screenRect = GetScreenBounds() / GetDesktopToDeviceScale();
} else {
if (!mSavedBounds) {
// This should never happen, at present, since we don't make windows
// fullscreen at their creation time; but it's not logically impossible.
MOZ_ASSERT(false, "fullscreen window did not have saved position");
return;
}
// Figure out where to go from here.
//
// Fortunately, since we're currently fullscreen (and other code should be
// handling _keeping_ us fullscreen even after display-layout changes),
// there's an obvious choice for which display we should attach to; all we
// need to determine is where on that display we should go.
const DesktopRect currentWinRect =
GetScreenBounds() / GetDesktopToDeviceScale();
// Optimization: if where we are is where we were, then where we originally
// came from is where we're going to go.
if (currentWinRect == DesktopRect(mSavedBounds->screenRect)) {
MOZ_LOG(sBaseWidgetLog, LogLevel::Debug,
("no location change detected; returning to saved location"));
doReposition(mSavedBounds->windowRect);
return;
}
/*
General case: figure out where we're going to go by dividing where we are
by where we were, and then multiplying by where we originally came from.
Less abstrusely: resize so that we occupy the same proportional position
on our current display after leaving fullscreen as we occupied on our
previous display before entering fullscreen.
(N.B.: We do not clamp. If we were only partially on the old display,
we'll be only partially on the new one, too.)
*/
MOZ_LOG(sBaseWidgetLog, LogLevel::Debug,
("location change detected; computing new destination"));
// splat: convert an arbitrary Rect into a tuple, for syntactic convenience.
const auto splat = [](auto rect) {
return std::tuple(rect.X(), rect.Y(), rect.Width(), rect.Height());
};
// remap: find the unique affine mapping which transforms `src` to `dst`,
// and apply it to `val`.
using Range = std::pair<float, float>;
const auto remap = [](Range dst, Range src, float val) {
// linear interpolation and its inverse: lerp(a, b, invlerp(a, b, t)) == t
const auto lerp = [](float lo, float hi, float t) {
return lo + t * (hi - lo);
};
const auto invlerp = [](float lo, float hi, float mid) {
return (mid - lo) / (hi - lo);
};
const auto [dst_a, dst_b] = dst;
const auto [src_a, src_b] = src;
return lerp(dst_a, dst_b, invlerp(src_a, src_b, val));
};
// original position
const auto [px, py, pw, ph] = splat(mSavedBounds->windowRect);
// source desktop rect
const auto [sx, sy, sw, sh] = splat(mSavedBounds->screenRect);
// target desktop rect
const auto [tx, ty, tw, th] = splat(currentWinRect);
const float nx = remap({tx, tx + tw}, {sx, sx + sw}, px);
const float ny = remap({ty, ty + th}, {sy, sy + sh}, py);
const float nw = remap({0, tw}, {0, sw}, pw);
const float nh = remap({0, th}, {0, sh}, ph);
doReposition(DesktopRect{nx, ny, nw, nh});
}
#undef MOZ_SPLAT_RECT
#undef MOZ_FORMAT_RECT
}
nsresult nsBaseWidget::MakeFullScreen(bool aFullScreen) {
InfallibleMakeFullScreen(aFullScreen);
return NS_OK;
}
nsBaseWidget::AutoLayerManagerSetup::AutoLayerManagerSetup(
nsBaseWidget* aWidget, gfxContext* aTarget, BufferMode aDoubleBuffering)
: mWidget(aWidget) {
WindowRenderer* renderer = mWidget->GetWindowRenderer();
if (renderer->AsFallback()) {
mRenderer = renderer->AsFallback();
mRenderer->SetTarget(aTarget, aDoubleBuffering);
}
}
nsBaseWidget::AutoLayerManagerSetup::~AutoLayerManagerSetup() {
if (mRenderer) {
mRenderer->SetTarget(nullptr, mozilla::layers::BufferMode::BUFFER_NONE);
}
}
bool nsBaseWidget::IsSmallPopup() const {
return mWindowType == WindowType::Popup && mPopupType != PopupType::Panel;
}
bool nsBaseWidget::ComputeShouldAccelerate() {
return gfx::gfxConfig::IsEnabled(gfx::Feature::HW_COMPOSITING) &&
(WidgetTypeSupportsAcceleration() ||
StaticPrefs::gfx_webrender_unaccelerated_widget_force());
}
bool nsBaseWidget::UseAPZ() {
return (gfxPlatform::AsyncPanZoomEnabled() &&
(mWindowType == WindowType::TopLevel ||
mWindowType == WindowType::Child ||
((mWindowType == WindowType::Popup ||
mWindowType == WindowType::Dialog) &&
HasRemoteContent() && StaticPrefs::apz_popups_enabled())));
}
void nsBaseWidget::CreateCompositor() {
LayoutDeviceIntRect rect = GetBounds();
CreateCompositor(rect.Width(), rect.Height());
}
void nsIWidget::PauseOrResumeCompositor(bool aPause) {
auto* renderer = GetRemoteRenderer();
if (!renderer) {
return;
}
if (aPause) {
renderer->SendPause();
} else {
renderer->SendResume();
}
}
already_AddRefed<GeckoContentController>
nsBaseWidget::CreateRootContentController() {
RefPtr<GeckoContentController> controller =
new ChromeProcessController(this, mAPZEventState, mAPZC);
return controller.forget();
}
void nsBaseWidget::ConfigureAPZCTreeManager() {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(mAPZC);
mAPZC->SetDPI(GetDPI());
if (StaticPrefs::apz_keyboard_enabled_AtStartup()) {
KeyboardMap map = RootWindowGlobalKeyListener::CollectKeyboardShortcuts();
mAPZC->SetKeyboardMap(map);
}
ContentReceivedInputBlockCallback callback(
[treeManager = RefPtr{mAPZC.get()}](uint64_t aInputBlockId,
bool aPreventDefault) {
MOZ_ASSERT(NS_IsMainThread());
treeManager->ContentReceivedInputBlock(aInputBlockId, aPreventDefault);
});
mAPZEventState = new APZEventState(this, std::move(callback));
mRootContentController = CreateRootContentController();
if (mRootContentController) {
mCompositorSession->SetContentController(mRootContentController);
}
// When APZ is enabled, we can actually enable raw touch events because we
// have code that can deal with them properly. If APZ is not enabled, this
// function doesn't get called.
if (StaticPrefs::dom_w3c_touch_events_enabled()) {
RegisterTouchWindow();
}
}
void nsBaseWidget::ConfigureAPZControllerThread() {
// By default the controller thread is the main thread.
APZThreadUtils::SetControllerThread(NS_GetCurrentThread());
}
void nsBaseWidget::SetConfirmedTargetAPZC(
uint64_t aInputBlockId,
const nsTArray<ScrollableLayerGuid>& aTargets) const {
mAPZC->SetTargetAPZC(aInputBlockId, aTargets);
}
void nsBaseWidget::UpdateZoomConstraints(
const uint32_t& aPresShellId, const ScrollableLayerGuid::ViewID& aViewId,
const Maybe<ZoomConstraints>& aConstraints) {
if (!mCompositorSession || !mAPZC) {
MOZ_ASSERT_IF(mInitialZoomConstraints,
mInitialZoomConstraints->mViewID == aViewId);
if (aConstraints) {
// We have some constraints, but the compositor and APZC aren't
// created yet. Save these so we can use them later.
mInitialZoomConstraints = Some(
InitialZoomConstraints(aPresShellId, aViewId, aConstraints.ref()));
} else {
mInitialZoomConstraints.reset();
}
return;
}
LayersId layersId = mCompositorSession->RootLayerTreeId();
mAPZC->UpdateZoomConstraints(
ScrollableLayerGuid(layersId, aPresShellId, aViewId), aConstraints);
}
bool nsBaseWidget::AsyncPanZoomEnabled() const { return !!mAPZC; }
nsEventStatus nsBaseWidget::ProcessUntransformedAPZEvent(
WidgetInputEvent* aEvent, const APZEventResult& aApzResult) {
MOZ_ASSERT(NS_IsMainThread());
ScrollableLayerGuid targetGuid = aApzResult.mTargetGuid;
uint64_t inputBlockId = aApzResult.mInputBlockId;
InputAPZContext context(aApzResult.mTargetGuid, inputBlockId,
aApzResult.GetStatus());
// Make a copy of the original event for the APZCCallbackHelper helpers that
// we call later, because the event passed to DispatchEvent can get mutated in
// ways that we don't want (i.e. touch points can get stripped out).
nsEventStatus status;
UniquePtr<WidgetEvent> original(aEvent->Duplicate());
DispatchEvent(aEvent, status);
if (mAPZC && !InputAPZContext::WasRoutedToChildProcess() &&
!InputAPZContext::WasDropped() && inputBlockId) {
// EventStateManager did not route the event into the child process and
// the event was dispatched in the parent process.
// It's safe to communicate to APZ that the event has been processed.
// Note that here aGuid.mLayersId might be different from
// mCompositorSession->RootLayerTreeId() because the event might have gotten
// hit-tested by APZ to be targeted at a child process, but a parent process
// event listener called preventDefault on it. In that case aGuid.mLayersId
// would still be the layers id for the child process, but the event would
// not have actually gotten routed to the child process. The main-thread
// hit-test result therefore needs to use the parent process layers id.
LayersId rootLayersId = mCompositorSession->RootLayerTreeId();
RefPtr<DisplayportSetListener> postLayerization;
if (WidgetTouchEvent* touchEvent = aEvent->AsTouchEvent()) {
nsTArray<TouchBehaviorFlags> allowedTouchBehaviors;
if (touchEvent->mMessage == eTouchStart) {
auto& originalEvent = *original->AsTouchEvent();
MOZ_ASSERT(NS_IsMainThread());
allowedTouchBehaviors = TouchActionHelper::GetAllowedTouchBehavior(
this, GetDocument(), originalEvent);
if (!allowedTouchBehaviors.IsEmpty()) {
mAPZC->SetAllowedTouchBehavior(inputBlockId, allowedTouchBehaviors);
}
postLayerization = APZCCallbackHelper::SendSetTargetAPZCNotification(
this, GetDocument(), originalEvent, rootLayersId, inputBlockId);
}
mAPZEventState->ProcessTouchEvent(*touchEvent, targetGuid, inputBlockId,
aApzResult.GetStatus(), status,
std::move(allowedTouchBehaviors));
} else if (WidgetWheelEvent* wheelEvent = aEvent->AsWheelEvent()) {
MOZ_ASSERT(wheelEvent->mFlags.mHandledByAPZ);
postLayerization = APZCCallbackHelper::SendSetTargetAPZCNotification(
this, GetDocument(), *original->AsWheelEvent(), rootLayersId,
inputBlockId);
if (wheelEvent->mCanTriggerSwipe) {
ReportSwipeStarted(inputBlockId, wheelEvent->TriggersSwipe());
}
mAPZEventState->ProcessWheelEvent(*wheelEvent, inputBlockId);
} else if (WidgetMouseEvent* mouseEvent = aEvent->AsMouseEvent()) {
MOZ_ASSERT(mouseEvent->mFlags.mHandledByAPZ);
postLayerization = APZCCallbackHelper::SendSetTargetAPZCNotification(
this, GetDocument(), *original->AsMouseEvent(), rootLayersId,
inputBlockId);
mAPZEventState->ProcessMouseEvent(*mouseEvent, inputBlockId);
}
if (postLayerization) {
postLayerization->Register();
}
}
return status;
}
template <class InputType, class EventType>
class DispatchEventOnMainThread : public Runnable {
public:
DispatchEventOnMainThread(const InputType& aInput, nsBaseWidget* aWidget,
const APZEventResult& aAPZResult)
: mozilla::Runnable("DispatchEventOnMainThread"),
mInput(aInput),
mWidget(aWidget),
mAPZResult(aAPZResult) {}
NS_IMETHOD Run() override {
EventType event = mInput.ToWidgetEvent(mWidget);
mWidget->ProcessUntransformedAPZEvent(&event, mAPZResult);
return NS_OK;
}
private:
InputType mInput;
nsBaseWidget* mWidget;
APZEventResult mAPZResult;
};
template <class InputType, class EventType>
class DispatchInputOnControllerThread : public Runnable {
public:
enum class APZOnly { Yes, No };
DispatchInputOnControllerThread(const EventType& aEvent,
IAPZCTreeManager* aAPZC,
nsBaseWidget* aWidget,
APZOnly aAPZOnly = APZOnly::No)
: mozilla::Runnable("DispatchInputOnControllerThread"),
mMainMessageLoop(MessageLoop::current()),
mInput(aEvent),
mAPZC(aAPZC),
mWidget(aWidget),
mAPZOnly(aAPZOnly) {}
NS_IMETHOD Run() override {
APZEventResult result = mAPZC->InputBridge()->ReceiveInputEvent(mInput);
if (mAPZOnly == APZOnly::Yes ||
result.GetStatus() == nsEventStatus_eConsumeNoDefault) {
return NS_OK;
}
RefPtr<Runnable> r = new DispatchEventOnMainThread<InputType, EventType>(
mInput, mWidget, result);
mMainMessageLoop->PostTask(r.forget());
return NS_OK;
}
private:
MessageLoop* mMainMessageLoop;
InputType mInput;
RefPtr<IAPZCTreeManager> mAPZC;
nsBaseWidget* mWidget;
const APZOnly mAPZOnly;
};
void nsBaseWidget::DispatchTouchInput(MultiTouchInput& aInput,
uint16_t aInputSource) {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aInputSource ==
mozilla::dom::MouseEvent_Binding::MOZ_SOURCE_TOUCH ||
aInputSource == mozilla::dom::MouseEvent_Binding::MOZ_SOURCE_PEN);
if (mAPZC) {
MOZ_ASSERT(APZThreadUtils::IsControllerThread());
APZEventResult result = mAPZC->InputBridge()->ReceiveInputEvent(aInput);
if (result.GetStatus() == nsEventStatus_eConsumeNoDefault) {
return;
}
WidgetTouchEvent event = aInput.ToWidgetEvent(this, aInputSource);
ProcessUntransformedAPZEvent(&event, result);
} else {
WidgetTouchEvent event = aInput.ToWidgetEvent(this, aInputSource);
nsEventStatus status;
DispatchEvent(&event, status);
}
}
void nsBaseWidget::DispatchPanGestureInput(PanGestureInput& aInput) {
MOZ_ASSERT(NS_IsMainThread());
if (mAPZC) {
MOZ_ASSERT(APZThreadUtils::IsControllerThread());
APZEventResult result = mAPZC->InputBridge()->ReceiveInputEvent(aInput);
if (result.GetStatus() == nsEventStatus_eConsumeNoDefault) {
return;
}
WidgetWheelEvent event = aInput.ToWidgetEvent(this);
ProcessUntransformedAPZEvent(&event, result);
} else {
WidgetWheelEvent event = aInput.ToWidgetEvent(this);
nsEventStatus status;
DispatchEvent(&event, status);
}
}
void nsBaseWidget::DispatchPinchGestureInput(PinchGestureInput& aInput) {
MOZ_ASSERT(NS_IsMainThread());
if (mAPZC) {
MOZ_ASSERT(APZThreadUtils::IsControllerThread());
APZEventResult result = mAPZC->InputBridge()->ReceiveInputEvent(aInput);
if (result.GetStatus() == nsEventStatus_eConsumeNoDefault) {
return;
}
WidgetWheelEvent event = aInput.ToWidgetEvent(this);
ProcessUntransformedAPZEvent(&event, result);
} else {
WidgetWheelEvent event = aInput.ToWidgetEvent(this);
nsEventStatus status;
DispatchEvent(&event, status);
}
}
nsIWidget::ContentAndAPZEventStatus nsBaseWidget::DispatchInputEvent(
WidgetInputEvent* aEvent) {
nsIWidget::ContentAndAPZEventStatus status;
MOZ_ASSERT(NS_IsMainThread());
if (mAPZC) {
if (APZThreadUtils::IsControllerThread()) {
APZEventResult result = mAPZC->InputBridge()->ReceiveInputEvent(*aEvent);
status.mApzStatus = result.GetStatus();
if (result.GetStatus() == nsEventStatus_eConsumeNoDefault) {
return status;
}
status.mContentStatus = ProcessUntransformedAPZEvent(aEvent, result);
return status;
}
// Most drag events aren't able to converted to MouseEvent except to
// eDragStart and eDragEnd.
const bool canDispatchToApzc =
!aEvent->AsDragEvent() ||
aEvent->AsDragEvent()->CanConvertToInputData();
if (canDispatchToApzc) {
if (WidgetWheelEvent* wheelEvent = aEvent->AsWheelEvent()) {
RefPtr<Runnable> r =
new DispatchInputOnControllerThread<ScrollWheelInput,
WidgetWheelEvent>(*wheelEvent,
mAPZC, this);
APZThreadUtils::RunOnControllerThread(std::move(r));
status.mContentStatus = nsEventStatus_eConsumeDoDefault;
return status;
}
if (WidgetMouseEvent* mouseEvent = aEvent->AsMouseEvent()) {
RefPtr<Runnable> r =
new DispatchInputOnControllerThread<MouseInput, WidgetMouseEvent>(
*mouseEvent, mAPZC, this);
APZThreadUtils::RunOnControllerThread(std::move(r));
status.mContentStatus = nsEventStatus_eConsumeDoDefault;
return status;
}
if (WidgetTouchEvent* touchEvent = aEvent->AsTouchEvent()) {
RefPtr<Runnable> r =
new DispatchInputOnControllerThread<MultiTouchInput,
WidgetTouchEvent>(*touchEvent,
mAPZC, this);
APZThreadUtils::RunOnControllerThread(std::move(r));
status.mContentStatus = nsEventStatus_eConsumeDoDefault;
return status;
}
// Allow dispatching keyboard/drag events on Gecko thread
// without sending them to APZ
// FIXME: APZ can handle keyboard events now, we should
// be sending them to APZ here
MOZ_ASSERT(aEvent->AsKeyboardEvent() || aEvent->AsDragEvent());
}
}
DispatchEvent(aEvent, status.mContentStatus);
return status;
}
void nsBaseWidget::DispatchEventToAPZOnly(mozilla::WidgetInputEvent* aEvent) {
MOZ_ASSERT(NS_IsMainThread());
if (mAPZC) {
if (APZThreadUtils::IsControllerThread()) {
mAPZC->InputBridge()->ReceiveInputEvent(*aEvent);
return;
}
if (WidgetMouseEvent* mouseEvent = aEvent->AsMouseEvent()) {
RefPtr<Runnable> r =
new DispatchInputOnControllerThread<MouseInput, WidgetMouseEvent>(
*mouseEvent, mAPZC, this,
DispatchInputOnControllerThread<MouseInput,
WidgetMouseEvent>::APZOnly::Yes);
APZThreadUtils::RunOnControllerThread(std::move(r));
return;
}
MOZ_ASSERT_UNREACHABLE("Not implemented yet");
}
}
bool nsBaseWidget::DispatchWindowEvent(WidgetGUIEvent& event) {
nsEventStatus status;
DispatchEvent(&event, status);
return ConvertStatus(status);
}
Document* nsBaseWidget::GetDocument() const {
if (mWidgetListener) {
if (PresShell* presShell = mWidgetListener->GetPresShell()) {
return presShell->GetDocument();
}
}
return nullptr;
}
void nsBaseWidget::CreateCompositorVsyncDispatcher() {
// Parent directly listens to the vsync source whereas
// child process communicate via IPC
// Should be called AFTER gfxPlatform is initialized
if (XRE_IsParentProcess()) {
if (!mCompositorVsyncDispatcherLock) {
mCompositorVsyncDispatcherLock =
MakeUnique<Mutex>("mCompositorVsyncDispatcherLock");
}
MutexAutoLock lock(*mCompositorVsyncDispatcherLock.get());
if (!mCompositorVsyncDispatcher) {
RefPtr<VsyncDispatcher> vsyncDispatcher =
gfxPlatform::GetPlatform()->GetGlobalVsyncDispatcher();
mCompositorVsyncDispatcher =
new CompositorVsyncDispatcher(std::move(vsyncDispatcher));
}
}
}
already_AddRefed<CompositorVsyncDispatcher>
nsBaseWidget::GetCompositorVsyncDispatcher() {
MOZ_ASSERT(mCompositorVsyncDispatcherLock.get());
MutexAutoLock lock(*mCompositorVsyncDispatcherLock.get());
RefPtr<CompositorVsyncDispatcher> dispatcher = mCompositorVsyncDispatcher;
return dispatcher.forget();
}
already_AddRefed<WebRenderLayerManager> nsBaseWidget::CreateCompositorSession(
int aWidth, int aHeight, CompositorOptions* aOptionsOut) {
MOZ_ASSERT(aOptionsOut);
do {
CreateCompositorVsyncDispatcher();
gfx::GPUProcessManager* gpu = gfx::GPUProcessManager::Get();
// Make sure GPU process is ready for use.
// If it failed to connect to GPU process, GPU process usage is disabled in
// EnsureGPUReady(). It could update gfxVars and gfxConfigs.
nsresult rv = gpu->EnsureGPUReady();
if (NS_WARN_IF(rv == NS_ERROR_ILLEGAL_DURING_SHUTDOWN)) {
return nullptr;
}
// If widget type does not supports acceleration, we may be allowed to use
// software WebRender instead.
bool supportsAcceleration = WidgetTypeSupportsAcceleration();
bool enableSWWR = true;
if (supportsAcceleration ||
StaticPrefs::gfx_webrender_unaccelerated_widget_force()) {
enableSWWR = gfx::gfxVars::UseSoftwareWebRender();
}
bool enableAPZ = UseAPZ();
CompositorOptions options(enableAPZ, enableSWWR);
#ifdef XP_WIN
if (supportsAcceleration) {
options.SetAllowSoftwareWebRenderD3D11(
gfx::gfxVars::AllowSoftwareWebRenderD3D11());
}
if (mNeedFastSnaphot) {
options.SetNeedFastSnaphot(true);
}
#elif defined(MOZ_WIDGET_ANDROID)
MOZ_ASSERT(supportsAcceleration);
options.SetAllowSoftwareWebRenderOGL(
gfx::gfxVars::AllowSoftwareWebRenderOGL());
#elif defined(MOZ_WIDGET_GTK)
if (supportsAcceleration) {
options.SetAllowSoftwareWebRenderOGL(
gfx::gfxVars::AllowSoftwareWebRenderOGL());
}
#endif
#ifdef MOZ_WIDGET_ANDROID
// Unconditionally set the compositor as initially paused, as we have not
// yet had a chance to send the compositor surface to the GPU process. We
// will do so shortly once we have returned to nsWindow::CreateLayerManager,
// where we will also resume the compositor if required.
options.SetInitiallyPaused(true);
#else
options.SetInitiallyPaused(CompositorInitiallyPaused());
#endif
RefPtr<WebRenderLayerManager> lm = new WebRenderLayerManager(this);
uint64_t innerWindowId = 0;
if (Document* doc = GetDocument()) {
innerWindowId = doc->InnerWindowID();
}
bool retry = false;
mCompositorSession = gpu->CreateTopLevelCompositor(
this, lm, GetDefaultScale(), options, UseExternalCompositingSurface(),
gfx::IntSize(aWidth, aHeight), innerWindowId, &retry);
if (mCompositorSession) {
TextureFactoryIdentifier textureFactoryIdentifier;
nsCString error;
lm->Initialize(mCompositorSession->GetCompositorBridgeChild(),
wr::AsPipelineId(mCompositorSession->RootLayerTreeId()),
&textureFactoryIdentifier, error);
if (textureFactoryIdentifier.mParentBackend != LayersBackend::LAYERS_WR) {
retry = true;
DestroyCompositor();
// gfxVars::UseDoubleBufferingWithCompositor() is also disabled.
gfx::GPUProcessManager::Get()->DisableWebRender(
wr::WebRenderError::INITIALIZE, error);
}
}
// We need to retry in a loop because the act of failing to create the
// compositor can change our state (e.g. disable WebRender).
if (mCompositorSession || !retry) {
*aOptionsOut = options;
return lm.forget();
}
} while (true);
}
void nsBaseWidget::CreateCompositor(int aWidth, int aHeight) {
// This makes sure that gfxPlatforms gets initialized if it hasn't by now.
gfxPlatform::GetPlatform();
MOZ_ASSERT(gfxPlatform::UsesOffMainThreadCompositing(),
"This function assumes OMTC");
MOZ_ASSERT(!mCompositorSession && !mCompositorBridgeChild,
"Should have properly cleaned up the previous PCompositor pair "
"beforehand");
if (mCompositorBridgeChild) {
mCompositorBridgeChild->Destroy();
}
// Recreating this is tricky, as we may still have an old and we need
// to make sure it's properly destroyed by calling DestroyCompositor!
// If we've already received a shutdown notification, don't try
// create a new compositor.
if (!mShutdownObserver) {
return;
}
// The controller thread must be configured before the compositor
// session is created, so that the input bridge runs on the right
// thread.
ConfigureAPZControllerThread();
CompositorOptions options;
RefPtr<WebRenderLayerManager> lm =
CreateCompositorSession(aWidth, aHeight, &options);
if (!lm) {
return;
}
MOZ_ASSERT(mCompositorSession);
mCompositorBridgeChild = mCompositorSession->GetCompositorBridgeChild();
SetCompositorWidgetDelegate(
mCompositorSession->GetCompositorWidgetDelegate());
if (options.UseAPZ()) {
mAPZC = mCompositorSession->GetAPZCTreeManager();
ConfigureAPZCTreeManager();
} else {
mAPZC = nullptr;
}
if (mInitialZoomConstraints) {
UpdateZoomConstraints(mInitialZoomConstraints->mPresShellID,
mInitialZoomConstraints->mViewID,
Some(mInitialZoomConstraints->mConstraints));
mInitialZoomConstraints.reset();
}
TextureFactoryIdentifier textureFactoryIdentifier =
lm->GetTextureFactoryIdentifier();
MOZ_ASSERT(textureFactoryIdentifier.mParentBackend ==
LayersBackend::LAYERS_WR);
ImageBridgeChild::IdentifyCompositorTextureHost(textureFactoryIdentifier);
gfx::VRManagerChild::IdentifyTextureHost(textureFactoryIdentifier);
WindowUsesOMTC();
mWindowRenderer = std::move(lm);
// Only track compositors for top-level windows, since other window types
// may use the basic compositor. Except on the OS X - see bug 1306383
#if defined(XP_MACOSX)
bool getCompositorFromThisWindow = true;
#else
bool getCompositorFromThisWindow = mWindowType == WindowType::TopLevel;
#endif
if (getCompositorFromThisWindow) {
gfxPlatform::GetPlatform()->NotifyCompositorCreated(
mWindowRenderer->GetCompositorBackendType());
}
}
void nsBaseWidget::NotifyCompositorSessionLost(CompositorSession* aSession) {
MOZ_ASSERT(aSession == mCompositorSession);
DestroyLayerManager();
}
bool nsBaseWidget::ShouldUseOffMainThreadCompositing() {
return gfxPlatform::UsesOffMainThreadCompositing();
}
WindowRenderer* nsBaseWidget::GetWindowRenderer() {
if (!mWindowRenderer) {
if (!mShutdownObserver) {
// We are shutting down, do not try to re-create a LayerManager
return nullptr;
}
// Try to use an async compositor first, if possible
if (ShouldUseOffMainThreadCompositing()) {
CreateCompositor();
}
if (!mWindowRenderer) {
mWindowRenderer = CreateFallbackRenderer();
}
}
return mWindowRenderer;
}
WindowRenderer* nsBaseWidget::CreateFallbackRenderer() {
return new FallbackRenderer;
}
CompositorBridgeChild* nsBaseWidget::GetRemoteRenderer() {
return mCompositorBridgeChild;
}
void nsBaseWidget::ClearCachedWebrenderResources() {
if (!mWindowRenderer || !mWindowRenderer->AsWebRender()) {
return;
}
mWindowRenderer->AsWebRender()->ClearCachedResources();
}
void nsBaseWidget::ClearWebrenderAnimationResources() {
if (!mWindowRenderer || !mWindowRenderer->AsWebRender()) {
return;
}
mWindowRenderer->AsWebRender()->ClearAnimationResources();
}
bool nsBaseWidget::SetNeedFastSnaphot() {
MOZ_ASSERT(XRE_IsParentProcess());
MOZ_ASSERT(!mCompositorSession);
if (!XRE_IsParentProcess() || mCompositorSession) {
return false;
}
mNeedFastSnaphot = true;
return true;
}
already_AddRefed<gfx::DrawTarget> nsBaseWidget::StartRemoteDrawing() {
return nullptr;
}
uint32_t nsBaseWidget::GetGLFrameBufferFormat() { return LOCAL_GL_RGBA; }
//-------------------------------------------------------------------------
//
// Destroy the window
//
//-------------------------------------------------------------------------
void nsBaseWidget::OnDestroy() {
if (mTextEventDispatcher) {
mTextEventDispatcher->OnDestroyWidget();
// Don't release it until this widget actually released because after this
// is called, TextEventDispatcher() may create it again.
}
// If this widget is being destroyed, let the APZ code know to drop references
// to this widget. Callers of this function all should be holding a deathgrip
// on this widget already.
ReleaseContentController();
}
void nsBaseWidget::MoveClient(const DesktopPoint& aOffset) {
LayoutDeviceIntPoint clientOffset(GetClientOffset());
// GetClientOffset returns device pixels; scale back to desktop pixels
// if that's what this widget uses for the Move/Resize APIs
if (BoundsUseDesktopPixels()) {
DesktopPoint desktopOffset = clientOffset / GetDesktopToDeviceScale();
Move(aOffset.x - desktopOffset.x, aOffset.y - desktopOffset.y);
} else {
LayoutDevicePoint layoutOffset = aOffset * GetDesktopToDeviceScale();
Move(layoutOffset.x - LayoutDeviceCoord(clientOffset.x),
layoutOffset.y - LayoutDeviceCoord(clientOffset.y));
}
}
void nsBaseWidget::ResizeClient(const DesktopSize& aSize, bool aRepaint) {
NS_ASSERTION((aSize.width >= 0), "Negative width passed to ResizeClient");
NS_ASSERTION((aSize.height >= 0), "Negative height passed to ResizeClient");
LayoutDeviceIntRect clientBounds = GetClientBounds();
// GetClientBounds and mBounds are device pixels; scale back to desktop pixels
// if that's what this widget uses for the Move/Resize APIs
if (BoundsUseDesktopPixels()) {
DesktopSize desktopDelta =
(LayoutDeviceIntSize(mBounds.Width(), mBounds.Height()) -
clientBounds.Size()) /
GetDesktopToDeviceScale();
Resize(aSize.width + desktopDelta.width, aSize.height + desktopDelta.height,
aRepaint);
} else {
LayoutDeviceSize layoutSize = aSize * GetDesktopToDeviceScale();
Resize(mBounds.Width() + (layoutSize.width - clientBounds.Width()),
mBounds.Height() + (layoutSize.height - clientBounds.Height()),
aRepaint);
}
}
void nsBaseWidget::ResizeClient(const DesktopRect& aRect, bool aRepaint) {
NS_ASSERTION((aRect.Width() >= 0), "Negative width passed to ResizeClient");
NS_ASSERTION((aRect.Height() >= 0), "Negative height passed to ResizeClient");
LayoutDeviceIntRect clientBounds = GetClientBounds();
LayoutDeviceIntPoint clientOffset = GetClientOffset();
DesktopToLayoutDeviceScale scale = GetDesktopToDeviceScale();
if (BoundsUseDesktopPixels()) {
DesktopPoint desktopOffset = clientOffset / scale;
DesktopSize desktopDelta =
(LayoutDeviceIntSize(mBounds.Width(), mBounds.Height()) -
clientBounds.Size()) /
scale;
Resize(aRect.X() - desktopOffset.x, aRect.Y() - desktopOffset.y,
aRect.Width() + desktopDelta.width,
aRect.Height() + desktopDelta.height, aRepaint);
} else {
LayoutDeviceRect layoutRect = aRect * scale;
Resize(layoutRect.X() - clientOffset.x, layoutRect.Y() - clientOffset.y,
layoutRect.Width() + mBounds.Width() - clientBounds.Width(),
layoutRect.Height() + mBounds.Height() - clientBounds.Height(),
aRepaint);
}
}
//-------------------------------------------------------------------------
//
// Bounds
//
//-------------------------------------------------------------------------
/**
* If the implementation of nsWindow supports borders this method MUST be
* overridden
*
**/
LayoutDeviceIntRect nsBaseWidget::GetClientBounds() { return GetBounds(); }
/**
* If the implementation of nsWindow supports borders this method MUST be
* overridden
*
**/
LayoutDeviceIntRect nsBaseWidget::GetBounds() { return mBounds; }
/**
* If the implementation of nsWindow uses a local coordinate system within the
*window, this method must be overridden
*
**/
LayoutDeviceIntRect nsBaseWidget::GetScreenBounds() { return GetBounds(); }
nsresult nsBaseWidget::GetRestoredBounds(LayoutDeviceIntRect& aRect) {
if (SizeMode() != nsSizeMode_Normal) {
return NS_ERROR_FAILURE;
}
aRect = GetScreenBounds();
return NS_OK;
}
LayoutDeviceIntPoint nsBaseWidget::GetClientOffset() {
return LayoutDeviceIntPoint(0, 0);
}
nsresult nsBaseWidget::SetNonClientMargins(const LayoutDeviceIntMargin&) {
return NS_ERROR_NOT_IMPLEMENTED;
}
void nsBaseWidget::SetResizeMargin(LayoutDeviceIntCoord aResizeMargin) {}
uint32_t nsBaseWidget::GetMaxTouchPoints() const { return 0; }
bool nsBaseWidget::HasPendingInputEvent() { return false; }
bool nsBaseWidget::ShowsResizeIndicator(LayoutDeviceIntRect* aResizerRect) {
return false;
}
/**
* Modifies aFile to point at an icon file with the given name and suffix. The
* suffix may correspond to a file extension with leading '.' if appropriate.
* Returns true if the icon file exists and can be read.
*/
static bool ResolveIconNameHelper(nsIFile* aFile, const nsAString& aIconName,
const nsAString& aIconSuffix) {
aFile->Append(u"icons"_ns);
aFile->Append(u"default"_ns);
aFile->Append(aIconName + aIconSuffix);
bool readable;
return NS_SUCCEEDED(aFile->IsReadable(&readable)) && readable;
}
/**
* Resolve the given icon name into a local file object. This method is
* intended to be called by subclasses of nsBaseWidget. aIconSuffix is a
* platform specific icon file suffix (e.g., ".ico" under Win32).
*
* If no file is found matching the given parameters, then null is returned.
*/
void nsBaseWidget::ResolveIconName(const nsAString& aIconName,
const nsAString& aIconSuffix,
nsIFile** aResult) {
*aResult = nullptr;
nsCOMPtr<nsIProperties> dirSvc =
do_GetService(NS_DIRECTORY_SERVICE_CONTRACTID);
if (!dirSvc) return;
// first check auxilary chrome directories
nsCOMPtr<nsISimpleEnumerator> dirs;
dirSvc->Get(NS_APP_CHROME_DIR_LIST, NS_GET_IID(nsISimpleEnumerator),
getter_AddRefs(dirs));
if (dirs) {
bool hasMore;
while (NS_SUCCEEDED(dirs->HasMoreElements(&hasMore)) && hasMore) {
nsCOMPtr<nsISupports> element;
dirs->GetNext(getter_AddRefs(element));
if (!element) continue;
nsCOMPtr<nsIFile> file = do_QueryInterface(element);
if (!file) continue;
if (ResolveIconNameHelper(file, aIconName, aIconSuffix)) {
NS_ADDREF(*aResult = file);
return;
}
}
}
// then check the main app chrome directory
nsCOMPtr<nsIFile> file;
dirSvc->Get(NS_APP_CHROME_DIR, NS_GET_IID(nsIFile), getter_AddRefs(file));
if (file && ResolveIconNameHelper(file, aIconName, aIconSuffix))
NS_ADDREF(*aResult = file);
}
void nsBaseWidget::SetSizeConstraints(const SizeConstraints& aConstraints) {
mSizeConstraints = aConstraints;
// Popups are constrained during layout, and we don't want to synchronously
// paint from reflow, so bail out... This is not great, but it's no worse than
// what we used to do.
//
// The right fix here is probably making constraint changes go through the
// view manager and such.
if (mWindowType == WindowType::Popup) {
return;
}
// If the current size doesn't meet the new constraints, trigger a
// resize to apply it. Note that, we don't want to invoke Resize if
// the new constraints don't affect the current size, because Resize
// implementation on some platforms may touch other geometry even if
// the size don't need to change.
LayoutDeviceIntSize curSize = mBounds.Size();
LayoutDeviceIntSize clampedSize =
Max(aConstraints.mMinSize, Min(aConstraints.mMaxSize, curSize));
if (clampedSize != curSize) {
gfx::Size size;
if (BoundsUseDesktopPixels()) {
DesktopSize desktopSize = clampedSize / GetDesktopToDeviceScale();
size = desktopSize.ToUnknownSize();
} else {
size = gfx::Size(clampedSize.ToUnknownSize());
}
Resize(size.width, size.height, true);
}
}
const widget::SizeConstraints nsBaseWidget::GetSizeConstraints() {
return mSizeConstraints;
}
// static
nsIRollupListener* nsBaseWidget::GetActiveRollupListener() {
// TODO: Simplify this.
return nsXULPopupManager::GetInstance();
}
void nsBaseWidget::NotifyWindowDestroyed() {
if (!mWidgetListener) return;
nsCOMPtr<nsIAppWindow> window = mWidgetListener->GetAppWindow();
nsCOMPtr<nsIBaseWindow> appWindow(do_QueryInterface(window));
if (appWindow) {
appWindow->Destroy();
}
}
void nsBaseWidget::NotifyWindowMoved(int32_t aX, int32_t aY,
ByMoveToRect aByMoveToRect) {
if (mWidgetListener) {
mWidgetListener->WindowMoved(this, aX, aY, aByMoveToRect);
}
if (mIMEHasFocus && IMENotificationRequestsRef().WantPositionChanged()) {
NotifyIME(IMENotification(IMEMessage::NOTIFY_IME_OF_POSITION_CHANGE));
}
}
void nsBaseWidget::NotifySizeMoveDone() {
if (!mWidgetListener) {
return;
}
if (PresShell* presShell = mWidgetListener->GetPresShell()) {
presShell->WindowSizeMoveDone();
}
}
void nsBaseWidget::NotifyThemeChanged(ThemeChangeKind aKind) {
LookAndFeel::NotifyChangedAllWindows(aKind);
}
nsresult nsBaseWidget::NotifyIME(const IMENotification& aIMENotification) {
if (mIMEHasQuit) {
return NS_OK;
}
switch (aIMENotification.mMessage) {
case REQUEST_TO_COMMIT_COMPOSITION:
case REQUEST_TO_CANCEL_COMPOSITION:
// We should send request to IME only when there is a TextEventDispatcher
// instance (this means that this widget has dispatched at least one
// composition event or keyboard event) and the it has composition.
// Otherwise, there is nothing to do.
// Note that if current input transaction is for native input events,
// TextEventDispatcher::NotifyIME() will call
// TextEventDispatcherListener::NotifyIME().
if (mTextEventDispatcher && mTextEventDispatcher->IsComposing()) {
return mTextEventDispatcher->NotifyIME(aIMENotification);
}
return NS_OK;
default: {
if (aIMENotification.mMessage == NOTIFY_IME_OF_FOCUS) {
mIMEHasFocus = true;
}
EnsureTextEventDispatcher();
// TextEventDispatcher::NotifyIME() will always call
// TextEventDispatcherListener::NotifyIME(). I.e., even if current
// input transaction is for synthesized events for automated tests,
// notifications will be sent to native IME.
nsresult rv = mTextEventDispatcher->NotifyIME(aIMENotification);
if (aIMENotification.mMessage == NOTIFY_IME_OF_BLUR) {
mIMEHasFocus = false;
}
return rv;
}
}
}
void nsBaseWidget::EnsureTextEventDispatcher() {
if (mTextEventDispatcher) {
return;
}
mTextEventDispatcher = new TextEventDispatcher(this);
}
nsIWidget::NativeIMEContext nsBaseWidget::GetNativeIMEContext() {
if (mTextEventDispatcher && mTextEventDispatcher->GetPseudoIMEContext()) {
// If we already have a TextEventDispatcher and it's working with
// a TextInputProcessor, we need to return pseudo IME context since
// TextCompositionArray::IndexOf(nsIWidget*) should return a composition
// on the pseudo IME context in such case.
NativeIMEContext pseudoIMEContext;
pseudoIMEContext.InitWithRawNativeIMEContext(
mTextEventDispatcher->GetPseudoIMEContext());
return pseudoIMEContext;
}
return NativeIMEContext(this);
}
nsIWidget::TextEventDispatcher* nsBaseWidget::GetTextEventDispatcher() {
EnsureTextEventDispatcher();
return mTextEventDispatcher;
}
void* nsBaseWidget::GetPseudoIMEContext() {
TextEventDispatcher* dispatcher = GetTextEventDispatcher();
if (!dispatcher) {
return nullptr;
}
return dispatcher->GetPseudoIMEContext();
}
TextEventDispatcherListener*
nsBaseWidget::GetNativeTextEventDispatcherListener() {
// TODO: If all platforms supported use of TextEventDispatcher for handling
// native IME and keyboard events, this method should be removed since
// in such case, this is overridden by all the subclasses.
return nullptr;
}
void nsBaseWidget::ZoomToRect(const uint32_t& aPresShellId,
const ScrollableLayerGuid::ViewID& aViewId,
const CSSRect& aRect, const uint32_t& aFlags) {
if (!mCompositorSession || !mAPZC) {
return;
}
LayersId layerId = mCompositorSession->RootLayerTreeId();
mAPZC->ZoomToRect(ScrollableLayerGuid(layerId, aPresShellId, aViewId),
ZoomTarget{aRect}, aFlags);
}
#ifdef ACCESSIBILITY
a11y::LocalAccessible* nsBaseWidget::GetRootAccessible() {
NS_ENSURE_TRUE(mWidgetListener, nullptr);
PresShell* presShell = mWidgetListener->GetPresShell();
NS_ENSURE_TRUE(presShell, nullptr);
// If container is null then the presshell is not active. This often happens
// when a preshell is being held onto for fastback.
nsPresContext* presContext = presShell->GetPresContext();
NS_ENSURE_TRUE(presContext->GetContainerWeak(), nullptr);
// LocalAccessible creation might be not safe so use IsSafeToRunScript to
// make sure it's not created at unsafe times.
nsAccessibilityService* accService = GetOrCreateAccService();
if (accService) {
return accService->GetRootDocumentAccessible(
presShell, nsContentUtils::IsSafeToRunScript());
}
return nullptr;
}
#endif // ACCESSIBILITY
void nsBaseWidget::StartAsyncScrollbarDrag(
const AsyncDragMetrics& aDragMetrics) {
if (!AsyncPanZoomEnabled()) {
return;
}
MOZ_ASSERT(XRE_IsParentProcess() && mCompositorSession);
LayersId layersId = mCompositorSession->RootLayerTreeId();
ScrollableLayerGuid guid(layersId, aDragMetrics.mPresShellId,
aDragMetrics.mViewId);
mAPZC->StartScrollbarDrag(guid, aDragMetrics);
}
bool nsBaseWidget::StartAsyncAutoscroll(const ScreenPoint& aAnchorLocation,
const ScrollableLayerGuid& aGuid) {
MOZ_ASSERT(XRE_IsParentProcess() && AsyncPanZoomEnabled());
return mAPZC->StartAutoscroll(aGuid, aAnchorLocation);
}
void nsBaseWidget::StopAsyncAutoscroll(const ScrollableLayerGuid& aGuid) {
MOZ_ASSERT(XRE_IsParentProcess() && AsyncPanZoomEnabled());
mAPZC->StopAutoscroll(aGuid);
}
LayersId nsBaseWidget::GetRootLayerTreeId() {
return mCompositorSession ? mCompositorSession->RootLayerTreeId()
: LayersId{0};
}
already_AddRefed<widget::Screen> nsBaseWidget::GetWidgetScreen() {
ScreenManager& screenManager = ScreenManager::GetSingleton();
LayoutDeviceIntRect bounds = GetScreenBounds();
DesktopIntRect deskBounds = RoundedToInt(bounds / GetDesktopToDeviceScale());
return screenManager.ScreenForRect(deskBounds);
}
mozilla::DesktopToLayoutDeviceScale
nsBaseWidget::GetDesktopToDeviceScaleByScreen() {
return (nsView::GetViewFor(this)->GetViewManager()->GetDeviceContext())
->GetDesktopToDeviceScale();
}
nsresult nsIWidget::SynthesizeNativeTouchTap(LayoutDeviceIntPoint aPoint,
bool aLongTap,
nsIObserver* aObserver) {
AutoObserverNotifier notifier(aObserver, "touchtap");
if (sPointerIdCounter > TOUCH_INJECT_MAX_POINTS) {
sPointerIdCounter = 0;
}
int pointerId = sPointerIdCounter;
sPointerIdCounter++;
nsresult rv = SynthesizeNativeTouchPoint(pointerId, TOUCH_CONTACT, aPoint,
1.0, 90, nullptr);
if (NS_FAILED(rv)) {
return rv;
}
if (!aLongTap) {
return SynthesizeNativeTouchPoint(pointerId, TOUCH_REMOVE, aPoint, 0, 0,
nullptr);
}
// initiate a long tap
int elapse = Preferences::GetInt("ui.click_hold_context_menus.delay",
TOUCH_INJECT_LONG_TAP_DEFAULT_MSEC);
if (!mLongTapTimer) {
mLongTapTimer = NS_NewTimer();
if (!mLongTapTimer) {
SynthesizeNativeTouchPoint(pointerId, TOUCH_CANCEL, aPoint, 0, 0,
nullptr);
return NS_ERROR_UNEXPECTED;
}
// Windows requires recuring events, so we set this to a smaller window
// than the pref value.
int timeout = elapse;
if (timeout > TOUCH_INJECT_PUMP_TIMER_MSEC) {
timeout = TOUCH_INJECT_PUMP_TIMER_MSEC;
}
mLongTapTimer->InitWithNamedFuncCallback(
OnLongTapTimerCallback, this, timeout, nsITimer::TYPE_REPEATING_SLACK,
"nsIWidget::SynthesizeNativeTouchTap");
}
// If we already have a long tap pending, cancel it. We only allow one long
// tap to be active at a time.
if (mLongTapTouchPoint) {
SynthesizeNativeTouchPoint(mLongTapTouchPoint->mPointerId, TOUCH_CANCEL,
mLongTapTouchPoint->mPosition, 0, 0, nullptr);
}
mLongTapTouchPoint = MakeUnique<LongTapInfo>(
pointerId, aPoint, TimeDuration::FromMilliseconds(elapse), aObserver);
notifier.SkipNotification(); // we'll do it in the long-tap callback
return NS_OK;
}
// static
void nsIWidget::OnLongTapTimerCallback(nsITimer* aTimer, void* aClosure) {
auto* self = static_cast<nsIWidget*>(aClosure);
if ((self->mLongTapTouchPoint->mStamp + self->mLongTapTouchPoint->mDuration) >
TimeStamp::Now()) {
#ifdef XP_WIN
// Windows needs us to keep pumping feedback to the digitizer, so update
// the pointer id with the same position.
self->SynthesizeNativeTouchPoint(
self->mLongTapTouchPoint->mPointerId, TOUCH_CONTACT,
self->mLongTapTouchPoint->mPosition, 1.0, 90, nullptr);
#endif
return;
}
AutoObserverNotifier notifier(self->mLongTapTouchPoint->mObserver,
"touchtap");
// finished, remove the touch point
self->mLongTapTimer->Cancel();
self->mLongTapTimer = nullptr;
self->SynthesizeNativeTouchPoint(
self->mLongTapTouchPoint->mPointerId, TOUCH_REMOVE,
self->mLongTapTouchPoint->mPosition, 0, 0, nullptr);
self->mLongTapTouchPoint = nullptr;
}
float nsIWidget::GetFallbackDPI() {
RefPtr<const Screen> primaryScreen =
ScreenManager::GetSingleton().GetPrimaryScreen();
return primaryScreen->GetDPI();
}
CSSToLayoutDeviceScale nsIWidget::GetFallbackDefaultScale() {
RefPtr<const Screen> s = ScreenManager::GetSingleton().GetPrimaryScreen();
return s->GetCSSToLayoutDeviceScale(Screen::IncludeOSZoom::No);
}
nsresult nsIWidget::ClearNativeTouchSequence(nsIObserver* aObserver) {
AutoObserverNotifier notifier(aObserver, "cleartouch");
// XXX This is odd. This is called by the constructor of nsIWidget. However,
// at that point, nsIWidget::mLongTapTimer must be nullptr. Therefore,
// this must do nothing at initializing the instance.
if (!mLongTapTimer) {
return NS_OK;
}
mLongTapTimer->Cancel();
mLongTapTimer = nullptr;
SynthesizeNativeTouchPoint(mLongTapTouchPoint->mPointerId, TOUCH_CANCEL,
mLongTapTouchPoint->mPosition, 0, 0, nullptr);
mLongTapTouchPoint = nullptr;
return NS_OK;
}
MultiTouchInput nsBaseWidget::UpdateSynthesizedTouchState(
MultiTouchInput* aState, mozilla::TimeStamp aTimeStamp, uint32_t aPointerId,
TouchPointerState aPointerState, LayoutDeviceIntPoint aPoint,
double aPointerPressure, uint32_t aPointerOrientation) {
ScreenIntPoint pointerScreenPoint = ViewAs<ScreenPixel>(
aPoint, PixelCastJustification::LayoutDeviceIsScreenForBounds);
// We can't dispatch *aState directly because (a) dispatching
// it might inadvertently modify it and (b) in the case of touchend or
// touchcancel events aState will hold the touches that are
// still down whereas the input dispatched needs to hold the removed
// touch(es). We use |inputToDispatch| for this purpose.
MultiTouchInput inputToDispatch;
inputToDispatch.mInputType = MULTITOUCH_INPUT;
inputToDispatch.mTimeStamp = aTimeStamp;
int32_t index = aState->IndexOfTouch((int32_t)aPointerId);
if (aPointerState == TOUCH_CONTACT) {
if (index >= 0) {
// found an existing touch point, update it
SingleTouchData& point = aState->mTouches[index];
point.mScreenPoint = pointerScreenPoint;
point.mRotationAngle = (float)aPointerOrientation;
point.mForce = (float)aPointerPressure;
inputToDispatch.mType = MultiTouchInput::MULTITOUCH_MOVE;
} else {
// new touch point, add it
aState->mTouches.AppendElement(SingleTouchData(
(int32_t)aPointerId, pointerScreenPoint, ScreenSize(0, 0),
(float)aPointerOrientation, (float)aPointerPressure));
inputToDispatch.mType = MultiTouchInput::MULTITOUCH_START;
}
inputToDispatch.mTouches = aState->mTouches;
} else {
MOZ_ASSERT(aPointerState == TOUCH_REMOVE || aPointerState == TOUCH_CANCEL);
// a touch point is being lifted, so remove it from the stored list
if (index >= 0) {
aState->mTouches.RemoveElementAt(index);
}
inputToDispatch.mType =
(aPointerState == TOUCH_REMOVE ? MultiTouchInput::MULTITOUCH_END
: MultiTouchInput::MULTITOUCH_CANCEL);
inputToDispatch.mTouches.AppendElement(SingleTouchData(
(int32_t)aPointerId, pointerScreenPoint, ScreenSize(0, 0),
(float)aPointerOrientation, (float)aPointerPressure));
}
return inputToDispatch;
}
void nsBaseWidget::NotifyLiveResizeStarted() {
// If we have mLiveResizeListeners already non-empty, we should notify those
// listeners that the resize stopped before starting anew. In theory this
// should never happen because we shouldn't get nested live resize actions.
NotifyLiveResizeStopped();
MOZ_ASSERT(mLiveResizeListeners.IsEmpty());
// If we can get the active remote tab for the current widget, suppress
// the displayport on it during the live resize.
if (!mWidgetListener) {
return;
}
nsCOMPtr<nsIAppWindow> appWindow = mWidgetListener->GetAppWindow();
if (!appWindow) {
return;
}
mLiveResizeListeners = appWindow->GetLiveResizeListeners();
for (uint32_t i = 0; i < mLiveResizeListeners.Length(); i++) {
mLiveResizeListeners[i]->LiveResizeStarted();
}
}
void nsBaseWidget::NotifyLiveResizeStopped() {
if (!mLiveResizeListeners.IsEmpty()) {
for (uint32_t i = 0; i < mLiveResizeListeners.Length(); i++) {
mLiveResizeListeners[i]->LiveResizeStopped();
}
mLiveResizeListeners.Clear();
}
}
nsresult nsBaseWidget::AsyncEnableDragDrop(bool aEnable) {
RefPtr<nsBaseWidget> kungFuDeathGrip = this;
return NS_DispatchToCurrentThreadQueue(
NS_NewRunnableFunction(
"AsyncEnableDragDropFn",
[this, aEnable, kungFuDeathGrip]() { EnableDragDrop(aEnable); }),
kAsyncDragDropTimeout, EventQueuePriority::Idle);
}
void nsBaseWidget::SwipeFinished() {
if (mSwipeTracker) {
mSwipeTracker->Destroy();
mSwipeTracker = nullptr;
}
}
void nsBaseWidget::ReportSwipeStarted(uint64_t aInputBlockId,
bool aStartSwipe) {
if (mSwipeEventQueue && mSwipeEventQueue->inputBlockId == aInputBlockId) {
if (aStartSwipe) {
PanGestureInput& startEvent = mSwipeEventQueue->queuedEvents[0];
TrackScrollEventAsSwipe(startEvent, mSwipeEventQueue->allowedDirections,
aInputBlockId);
for (size_t i = 1; i < mSwipeEventQueue->queuedEvents.Length(); i++) {
mSwipeTracker->ProcessEvent(mSwipeEventQueue->queuedEvents[i]);
}
} else if (mAPZC) {
// If the event wasn't start swipe, we need to notify it to APZ.
mAPZC->SetBrowserGestureResponse(aInputBlockId,
BrowserGestureResponse::NotConsumed);
}
mSwipeEventQueue = nullptr;
}
}
void nsBaseWidget::TrackScrollEventAsSwipe(
const mozilla::PanGestureInput& aSwipeStartEvent,
uint32_t aAllowedDirections, uint64_t aInputBlockId) {
// If a swipe is currently being tracked kill it -- it's been interrupted
// by another gesture event.
if (mSwipeTracker) {
mSwipeTracker->CancelSwipe(aSwipeStartEvent.mTimeStamp);
mSwipeTracker->Destroy();
mSwipeTracker = nullptr;
}
uint32_t direction =
(aSwipeStartEvent.mPanDisplacement.x > 0.0)
? (uint32_t)dom::SimpleGestureEvent_Binding::DIRECTION_RIGHT
: (uint32_t)dom::SimpleGestureEvent_Binding::DIRECTION_LEFT;
mSwipeTracker =
new SwipeTracker(*this, aSwipeStartEvent, aAllowedDirections, direction);
if (!mAPZC) {
mCurrentPanGestureBelongsToSwipe = true;
} else {
// Now SwipeTracker has started consuming pan events, notify it to APZ so
// that APZ can discard queued events.
mAPZC->SetBrowserGestureResponse(aInputBlockId,
BrowserGestureResponse::Consumed);
}
}
nsBaseWidget::SwipeInfo nsBaseWidget::SendMayStartSwipe(
const mozilla::PanGestureInput& aSwipeStartEvent) {
nsCOMPtr<nsIWidget> kungFuDeathGrip(this);
uint32_t direction =
(aSwipeStartEvent.mPanDisplacement.x > 0.0)
? (uint32_t)dom::SimpleGestureEvent_Binding::DIRECTION_RIGHT
: (uint32_t)dom::SimpleGestureEvent_Binding::DIRECTION_LEFT;
// We're ready to start the animation. Tell Gecko about it, and at the same
// time ask it if it really wants to start an animation for this event.
// This event also reports back the directions that we can swipe in.
LayoutDeviceIntPoint position = RoundedToInt(aSwipeStartEvent.mPanStartPoint *
ScreenToLayoutDeviceScale(1));
WidgetSimpleGestureEvent geckoEvent = SwipeTracker::CreateSwipeGestureEvent(
eSwipeGestureMayStart, this, position, aSwipeStartEvent.mTimeStamp);
geckoEvent.mDirection = direction;
geckoEvent.mDelta = 0.0;
geckoEvent.mAllowedDirections = 0;
bool shouldStartSwipe =
DispatchWindowEvent(geckoEvent); // event cancelled == swipe should start
SwipeInfo result = {shouldStartSwipe, geckoEvent.mAllowedDirections};
return result;
}
WidgetWheelEvent nsBaseWidget::MayStartSwipeForAPZ(
const PanGestureInput& aPanInput, const APZEventResult& aApzResult) {
WidgetWheelEvent event = aPanInput.ToWidgetEvent(this);
// Ignore swipe-to-navigation in PiP window.
if (mIsPIPWindow) {
return event;
}
if (aPanInput.AllowsSwipe()) {
SwipeInfo swipeInfo = SendMayStartSwipe(aPanInput);
event.mCanTriggerSwipe = swipeInfo.wantsSwipe;
if (swipeInfo.wantsSwipe) {
if (aApzResult.GetStatus() == nsEventStatus_eIgnore) {
// APZ has determined and that scrolling horizontally in the
// requested direction is impossible, so it didn't do any
// scrolling for the event.
// We know now that MayStartSwipe wants a swipe, so we can start
// the swipe now.
TrackScrollEventAsSwipe(aPanInput, swipeInfo.allowedDirections,
aApzResult.mInputBlockId);
} else if (!aApzResult.GetHandledResult() ||
!aApzResult.GetHandledResult()->IsHandledByRoot()) {
// We don't know whether this event can start a swipe, so we need
// to queue up events and wait for a call to ReportSwipeStarted.
// APZ might already have started scrolling in response to the
// event if it knew that it's the right thing to do. In that case
// we'll still get a call to ReportSwipeStarted, and we will
// discard the queued events at that point.
mSwipeEventQueue = MakeUnique<SwipeEventQueue>(
swipeInfo.allowedDirections, aApzResult.mInputBlockId);
}
} else {
// Inform that the browser gesture didn't use the pan event (pan-start
// precisely), so that APZ can now start using the event for
// scrolling/overscrolling.
mAPZC->SetBrowserGestureResponse(aApzResult.mInputBlockId,
BrowserGestureResponse::NotConsumed);
}
}
if (mSwipeEventQueue &&
mSwipeEventQueue->inputBlockId == aApzResult.mInputBlockId) {
mSwipeEventQueue->queuedEvents.AppendElement(aPanInput);
}
return event;
}
bool nsBaseWidget::MayStartSwipeForNonAPZ(const PanGestureInput& aPanInput) {
// Ignore swipe-to-navigation in PiP window.
if (mIsPIPWindow) {
return false;
}
if (aPanInput.mType == PanGestureInput::PANGESTURE_MAYSTART ||
aPanInput.mType == PanGestureInput::PANGESTURE_START) {
mCurrentPanGestureBelongsToSwipe = false;
}
if (mCurrentPanGestureBelongsToSwipe) {
// Ignore this event. It's a momentum event from a scroll gesture
// that was processed as a swipe, and the swipe animation has
// already finished (so mSwipeTracker is already null).
MOZ_ASSERT(aPanInput.IsMomentum(),
"If the fingers are still on the touchpad, we should still have "
"a SwipeTracker, "
"and it should have consumed this event.");
return true;
}
if (!aPanInput.MayTriggerSwipe()) {
return false;
}
SwipeInfo swipeInfo = SendMayStartSwipe(aPanInput);
// We're in the non-APZ case here, but we still want to know whether
// the event was routed to a child process, so we use InputAPZContext
// to get that piece of information.
ScrollableLayerGuid guid;
uint64_t blockId = 0;
InputAPZContext context(guid, blockId, nsEventStatus_eIgnore);
WidgetWheelEvent event = aPanInput.ToWidgetEvent(this);
event.mCanTriggerSwipe = swipeInfo.wantsSwipe;
nsEventStatus status;
DispatchEvent(&event, status);
if (swipeInfo.wantsSwipe) {
if (context.WasRoutedToChildProcess()) {
// We don't know whether this event can start a swipe, so we need
// to queue up events and wait for a call to ReportSwipeStarted.
mSwipeEventQueue =
MakeUnique<SwipeEventQueue>(swipeInfo.allowedDirections, blockId);
} else if (event.TriggersSwipe()) {
TrackScrollEventAsSwipe(aPanInput, swipeInfo.allowedDirections, blockId);
}
}
if (mSwipeEventQueue && mSwipeEventQueue->inputBlockId == 0) {
mSwipeEventQueue->queuedEvents.AppendElement(aPanInput);
}
return true;
}
const IMENotificationRequests& nsIWidget::IMENotificationRequestsRef() {
TextEventDispatcher* dispatcher = GetTextEventDispatcher();
return dispatcher->IMENotificationRequestsRef();
}
void nsIWidget::PostHandleKeyEvent(mozilla::WidgetKeyboardEvent* aEvent) {}
bool nsIWidget::GetEditCommands(NativeKeyBindingsType aType,
const WidgetKeyboardEvent& aEvent,
nsTArray<CommandInt>& aCommands) {
MOZ_ASSERT(aEvent.IsTrusted());
MOZ_ASSERT(aCommands.IsEmpty());
return true;
}
already_AddRefed<nsIBidiKeyboard> nsIWidget::CreateBidiKeyboard() {
if (XRE_IsContentProcess()) {
return CreateBidiKeyboardContentProcess();
}
return CreateBidiKeyboardInner();
}
#ifdef ANDROID
already_AddRefed<nsIBidiKeyboard> nsIWidget::CreateBidiKeyboardInner() {
// no bidi keyboard implementation
return nullptr;
}
#endif
namespace mozilla::widget {
const char* ToChar(InputContext::Origin aOrigin) {
switch (aOrigin) {
case InputContext::ORIGIN_MAIN:
return "ORIGIN_MAIN";
case InputContext::ORIGIN_CONTENT:
return "ORIGIN_CONTENT";
default:
return "Unexpected value";
}
}
const char* ToChar(IMEMessage aIMEMessage) {
switch (aIMEMessage) {
case NOTIFY_IME_OF_NOTHING:
return "NOTIFY_IME_OF_NOTHING";
case NOTIFY_IME_OF_FOCUS:
return "NOTIFY_IME_OF_FOCUS";
case NOTIFY_IME_OF_BLUR:
return "NOTIFY_IME_OF_BLUR";
case NOTIFY_IME_OF_SELECTION_CHANGE:
return "NOTIFY_IME_OF_SELECTION_CHANGE";
case NOTIFY_IME_OF_TEXT_CHANGE:
return "NOTIFY_IME_OF_TEXT_CHANGE";
case NOTIFY_IME_OF_COMPOSITION_EVENT_HANDLED:
return "NOTIFY_IME_OF_COMPOSITION_EVENT_HANDLED";
case NOTIFY_IME_OF_POSITION_CHANGE:
return "NOTIFY_IME_OF_POSITION_CHANGE";
case NOTIFY_IME_OF_MOUSE_BUTTON_EVENT:
return "NOTIFY_IME_OF_MOUSE_BUTTON_EVENT";
case REQUEST_TO_COMMIT_COMPOSITION:
return "REQUEST_TO_COMMIT_COMPOSITION";
case REQUEST_TO_CANCEL_COMPOSITION:
return "REQUEST_TO_CANCEL_COMPOSITION";
default:
return "Unexpected value";
}
}
void NativeIMEContext::Init(nsIWidget* aWidget) {
if (!aWidget) {
mRawNativeIMEContext = reinterpret_cast<uintptr_t>(nullptr);
mOriginProcessID = static_cast<uint64_t>(-1);
return;
}
if (!XRE_IsContentProcess()) {
mRawNativeIMEContext = reinterpret_cast<uintptr_t>(
aWidget->GetNativeData(NS_RAW_NATIVE_IME_CONTEXT));
mOriginProcessID = 0;
return;
}
// If this is created in a child process, aWidget is an instance of
// PuppetWidget which doesn't support NS_RAW_NATIVE_IME_CONTEXT.
// Instead of that PuppetWidget::GetNativeIMEContext() returns cached
// native IME context of the parent process.
*this = aWidget->GetNativeIMEContext();
}
void NativeIMEContext::InitWithRawNativeIMEContext(void* aRawNativeIMEContext) {
if (NS_WARN_IF(!aRawNativeIMEContext)) {
mRawNativeIMEContext = reinterpret_cast<uintptr_t>(nullptr);
mOriginProcessID = static_cast<uint64_t>(-1);
return;
}
mRawNativeIMEContext = reinterpret_cast<uintptr_t>(aRawNativeIMEContext);
mOriginProcessID =
XRE_IsContentProcess() ? ContentChild::GetSingleton()->GetID() : 0;
}
void IMENotification::TextChangeDataBase::MergeWith(
const IMENotification::TextChangeDataBase& aOther) {
MOZ_ASSERT(aOther.IsValid(), "Merging data must store valid data");
MOZ_ASSERT(aOther.mStartOffset <= aOther.mRemovedEndOffset,
"end of removed text must be same or larger than start");
MOZ_ASSERT(aOther.mStartOffset <= aOther.mAddedEndOffset,
"end of added text must be same or larger than start");
if (!IsValid()) {
*this = aOther;
return;
}
// |mStartOffset| and |mRemovedEndOffset| represent all replaced or removed
// text ranges. I.e., mStartOffset should be the smallest offset of all
// modified text ranges in old text. |mRemovedEndOffset| should be the
// largest end offset in old text of all modified text ranges.
// |mAddedEndOffset| represents the end offset of all inserted text ranges.
// I.e., only this is an offset in new text.
// In other words, between mStartOffset and |mRemovedEndOffset| of the
// premodified text was already removed. And some text whose length is
// |mAddedEndOffset - mStartOffset| is inserted to |mStartOffset|. I.e.,
// this allows IME to mark dirty the modified text range with |mStartOffset|
// and |mRemovedEndOffset| if IME stores all text of the focused editor and
// to compute new text length with |mAddedEndOffset| and |mRemovedEndOffset|.
// Additionally, IME can retrieve only the text between |mStartOffset| and
// |mAddedEndOffset| for updating stored text.
// For comparing new and old |mStartOffset|/|mRemovedEndOffset| values, they
// should be adjusted to be in same text. The |newData.mStartOffset| and
// |newData.mRemovedEndOffset| should be computed as in old text because
// |mStartOffset| and |mRemovedEndOffset| represent the modified text range
// in the old text but even if some text before the values of the newData
// has already been modified, the values don't include the changes.
// For comparing new and old |mAddedEndOffset| values, they should be
// adjusted to be in same text. The |oldData.mAddedEndOffset| should be
// computed as in the new text because |mAddedEndOffset| indicates the end
// offset of inserted text in the new text but |oldData.mAddedEndOffset|
// doesn't include any changes of the text before |newData.mAddedEndOffset|.
const TextChangeDataBase& newData = aOther;
const TextChangeDataBase oldData = *this;
// mCausedOnlyByComposition should be true only when all changes are caused
// by composition.
mCausedOnlyByComposition =
newData.mCausedOnlyByComposition && oldData.mCausedOnlyByComposition;
// mIncludingChangesWithoutComposition should be true if at least one of
// merged changes occurred without composition.
mIncludingChangesWithoutComposition =
newData.mIncludingChangesWithoutComposition ||
oldData.mIncludingChangesWithoutComposition;
// mIncludingChangesDuringComposition should be true when at least one of
// the merged non-composition changes occurred during the latest composition.
if (!newData.mCausedOnlyByComposition &&
!newData.mIncludingChangesDuringComposition) {
MOZ_ASSERT(newData.mIncludingChangesWithoutComposition);
MOZ_ASSERT(mIncludingChangesWithoutComposition);
// If new change is neither caused by composition nor occurred during
// composition, set mIncludingChangesDuringComposition to false because
// IME doesn't want outdated text changes as text change during current
// composition.
mIncludingChangesDuringComposition = false;
} else {
// Otherwise, set mIncludingChangesDuringComposition to true if either
// oldData or newData includes changes during composition.
mIncludingChangesDuringComposition =
newData.mIncludingChangesDuringComposition ||
oldData.mIncludingChangesDuringComposition;
}
if (newData.mStartOffset >= oldData.mAddedEndOffset) {
// Case 1:
// If new start is after old end offset of added text, it means that text
// after the modified range is modified. Like:
// added range of old change: +----------+
// removed range of new change: +----------+
// So, the old start offset is always the smaller offset.
mStartOffset = oldData.mStartOffset;
// The new end offset of removed text is moved by the old change and we
// need to cancel the move of the old change for comparing the offsets in
// same text because it doesn't make sensce to compare offsets in different
// text.
uint32_t newRemovedEndOffsetInOldText =
newData.mRemovedEndOffset - oldData.Difference();
mRemovedEndOffset =
std::max(newRemovedEndOffsetInOldText, oldData.mRemovedEndOffset);
// The new end offset of added text is always the larger offset.
mAddedEndOffset = newData.mAddedEndOffset;
return;
}
if (newData.mStartOffset >= oldData.mStartOffset) {
// If new start is in the modified range, it means that new data changes
// a part or all of the range.
mStartOffset = oldData.mStartOffset;
if (newData.mRemovedEndOffset >= oldData.mAddedEndOffset) {
// Case 2:
// If new end of removed text is greater than old end of added text, it
// means that all or a part of modified range modified again and text
// after the modified range is also modified. Like:
// added range of old change: +----------+
// removed range of new change: +----------+
// So, the new removed end offset is moved by the old change and we need
// to cancel the move of the old change for comparing the offsets in the
// same text because it doesn't make sense to compare the offsets in
// different text.
uint32_t newRemovedEndOffsetInOldText =
newData.mRemovedEndOffset - oldData.Difference();
mRemovedEndOffset =
std::max(newRemovedEndOffsetInOldText, oldData.mRemovedEndOffset);
// The old end of added text is replaced by new change. So, it should be
// same as the new start. On the other hand, the new added end offset is
// always same or larger. Therefore, the merged end offset of added
// text should be the new end offset of added text.
mAddedEndOffset = newData.mAddedEndOffset;
return;
}
// Case 3:
// If new end of removed text is less than old end of added text, it means
// that only a part of the modified range is modified again. Like:
// added range of old change: +------------+
// removed range of new change: +-----+
// So, the new end offset of removed text should be same as the old end
// offset of removed text. Therefore, the merged end offset of removed
// text should be the old text change's |mRemovedEndOffset|.
mRemovedEndOffset = oldData.mRemovedEndOffset;
// The old end of added text is moved by new change. So, we need to cancel
// the move of the new change for comparing the offsets in same text.
uint32_t oldAddedEndOffsetInNewText =
oldData.mAddedEndOffset + newData.Difference();
mAddedEndOffset =
std::max(newData.mAddedEndOffset, oldAddedEndOffsetInNewText);
return;
}
if (newData.mRemovedEndOffset >= oldData.mStartOffset) {
// If new end of removed text is greater than old start (and new start is
// less than old start), it means that a part of modified range is modified
// again and some new text before the modified range is also modified.
MOZ_ASSERT(newData.mStartOffset < oldData.mStartOffset,
"new start offset should be less than old one here");
mStartOffset = newData.mStartOffset;
if (newData.mRemovedEndOffset >= oldData.mAddedEndOffset) {
// Case 4:
// If new end of removed text is greater than old end of added text, it
// means that all modified text and text after the modified range is
// modified. Like:
// added range of old change: +----------+
// removed range of new change: +------------------+
// So, the new end of removed text is moved by the old change. Therefore,
// we need to cancel the move of the old change for comparing the offsets
// in same text because it doesn't make sense to compare the offsets in
// different text.
uint32_t newRemovedEndOffsetInOldText =
newData.mRemovedEndOffset - oldData.Difference();
mRemovedEndOffset =
std::max(newRemovedEndOffsetInOldText, oldData.mRemovedEndOffset);
// The old end of added text is replaced by new change. So, the old end
// offset of added text is same as new text change's start offset. Then,
// new change's end offset of added text is always same or larger than
// it. Therefore, merged end offset of added text is always the new end
// offset of added text.
mAddedEndOffset = newData.mAddedEndOffset;
return;
}
// Case 5:
// If new end of removed text is less than old end of added text, it
// means that only a part of the modified range is modified again. Like:
// added range of old change: +----------+
// removed range of new change: +----------+
// So, the new end of removed text should be same as old end of removed
// text for preventing end of removed text to be modified. Therefore,
// merged end offset of removed text is always the old end offset of removed
// text.
mRemovedEndOffset = oldData.mRemovedEndOffset;
// The old end of added text is moved by this change. So, we need to
// cancel the move of the new change for comparing the offsets in same text
// because it doesn't make sense to compare the offsets in different text.
uint32_t oldAddedEndOffsetInNewText =
oldData.mAddedEndOffset + newData.Difference();
mAddedEndOffset =
std::max(newData.mAddedEndOffset, oldAddedEndOffsetInNewText);
return;
}
// Case 6:
// Otherwise, i.e., both new end of added text and new start are less than
// old start, text before the modified range is modified. Like:
// added range of old change: +----------+
// removed range of new change: +----------+
MOZ_ASSERT(newData.mStartOffset < oldData.mStartOffset,
"new start offset should be less than old one here");
mStartOffset = newData.mStartOffset;
MOZ_ASSERT(newData.mRemovedEndOffset < oldData.mRemovedEndOffset,
"new removed end offset should be less than old one here");
mRemovedEndOffset = oldData.mRemovedEndOffset;
// The end of added text should be adjusted with the new difference.
uint32_t oldAddedEndOffsetInNewText =
oldData.mAddedEndOffset + newData.Difference();
mAddedEndOffset =
std::max(newData.mAddedEndOffset, oldAddedEndOffsetInNewText);
}
#ifdef DEBUG
// Let's test the code of merging multiple text change data in debug build
// and crash if one of them fails because this feature is very complex but
// cannot be tested with mochitest.
void IMENotification::TextChangeDataBase::Test() {
static bool gTestTextChangeEvent = true;
if (!gTestTextChangeEvent) {
return;
}
gTestTextChangeEvent = false;
/****************************************************************************
* Case 1
****************************************************************************/
// Appending text
MergeWith(TextChangeData(10, 10, 20, false, false));
MergeWith(TextChangeData(20, 20, 35, false, false));
MOZ_ASSERT(mStartOffset == 10,
"Test 1-1-1: mStartOffset should be the first offset");
MOZ_ASSERT(
mRemovedEndOffset == 10, // 20 - (20 - 10)
"Test 1-1-2: mRemovedEndOffset should be the first end of removed text");
MOZ_ASSERT(
mAddedEndOffset == 35,
"Test 1-1-3: mAddedEndOffset should be the last end of added text");
Clear();
// Removing text (longer line -> shorter line)
MergeWith(TextChangeData(10, 20, 10, false, false));
MergeWith(TextChangeData(10, 30, 10, false, false));
MOZ_ASSERT(mStartOffset == 10,
"Test 1-2-1: mStartOffset should be the first offset");
MOZ_ASSERT(mRemovedEndOffset == 40, // 30 + (10 - 20)
"Test 1-2-2: mRemovedEndOffset should be the the last end of "
"removed text "
"with already removed length");
MOZ_ASSERT(
mAddedEndOffset == 10,
"Test 1-2-3: mAddedEndOffset should be the last end of added text");
Clear();
// Removing text (shorter line -> longer line)
MergeWith(TextChangeData(10, 20, 10, false, false));
MergeWith(TextChangeData(10, 15, 10, false, false));
MOZ_ASSERT(mStartOffset == 10,
"Test 1-3-1: mStartOffset should be the first offset");
MOZ_ASSERT(mRemovedEndOffset == 25, // 15 + (10 - 20)
"Test 1-3-2: mRemovedEndOffset should be the the last end of "
"removed text "
"with already removed length");
MOZ_ASSERT(
mAddedEndOffset == 10,
"Test 1-3-3: mAddedEndOffset should be the last end of added text");
Clear();
// Appending text at different point (not sure if actually occurs)
MergeWith(TextChangeData(10, 10, 20, false, false));
MergeWith(TextChangeData(55, 55, 60, false, false));
MOZ_ASSERT(mStartOffset == 10,
"Test 1-4-1: mStartOffset should be the smallest offset");
MOZ_ASSERT(
mRemovedEndOffset == 45, // 55 - (10 - 20)
"Test 1-4-2: mRemovedEndOffset should be the the largest end of removed "
"text without already added length");
MOZ_ASSERT(
mAddedEndOffset == 60,
"Test 1-4-3: mAddedEndOffset should be the last end of added text");
Clear();
// Removing text at different point (not sure if actually occurs)
MergeWith(TextChangeData(10, 20, 10, false, false));
MergeWith(TextChangeData(55, 68, 55, false, false));
MOZ_ASSERT(mStartOffset == 10,
"Test 1-5-1: mStartOffset should be the smallest offset");
MOZ_ASSERT(
mRemovedEndOffset == 78, // 68 - (10 - 20)
"Test 1-5-2: mRemovedEndOffset should be the the largest end of removed "
"text with already removed length");
MOZ_ASSERT(
mAddedEndOffset == 55,
"Test 1-5-3: mAddedEndOffset should be the largest end of added text");
Clear();
// Replacing text and append text (becomes longer)
MergeWith(TextChangeData(30, 35, 32, false, false));
MergeWith(TextChangeData(32, 32, 40, false, false));
MOZ_ASSERT(mStartOffset == 30,
"Test 1-6-1: mStartOffset should be the smallest offset");
MOZ_ASSERT(
mRemovedEndOffset == 35, // 32 - (32 - 35)
"Test 1-6-2: mRemovedEndOffset should be the the first end of removed "
"text");
MOZ_ASSERT(
mAddedEndOffset == 40,
"Test 1-6-3: mAddedEndOffset should be the last end of added text");
Clear();
// Replacing text and append text (becomes shorter)
MergeWith(TextChangeData(30, 35, 32, false, false));
MergeWith(TextChangeData(32, 32, 33, false, false));
MOZ_ASSERT(mStartOffset == 30,
"Test 1-7-1: mStartOffset should be the smallest offset");
MOZ_ASSERT(
mRemovedEndOffset == 35, // 32 - (32 - 35)
"Test 1-7-2: mRemovedEndOffset should be the the first end of removed "
"text");
MOZ_ASSERT(
mAddedEndOffset == 33,
"Test 1-7-3: mAddedEndOffset should be the last end of added text");
Clear();
// Removing text and replacing text after first range (not sure if actually
// occurs)
MergeWith(TextChangeData(30, 35, 30, false, false));
MergeWith(TextChangeData(32, 34, 48, false, false));
MOZ_ASSERT(mStartOffset == 30,
"Test 1-8-1: mStartOffset should be the smallest offset");
MOZ_ASSERT(mRemovedEndOffset == 39, // 34 - (30 - 35)
"Test 1-8-2: mRemovedEndOffset should be the the first end of "
"removed text "
"without already removed text");
MOZ_ASSERT(
mAddedEndOffset == 48,
"Test 1-8-3: mAddedEndOffset should be the last end of added text");
Clear();
// Removing text and replacing text after first range (not sure if actually
// occurs)
MergeWith(TextChangeData(30, 35, 30, false, false));
MergeWith(TextChangeData(32, 38, 36, false, false));
MOZ_ASSERT(mStartOffset == 30,
"Test 1-9-1: mStartOffset should be the smallest offset");
MOZ_ASSERT(mRemovedEndOffset == 43, // 38 - (30 - 35)
"Test 1-9-2: mRemovedEndOffset should be the the first end of "
"removed text "
"without already removed text");
MOZ_ASSERT(
mAddedEndOffset == 36,
"Test 1-9-3: mAddedEndOffset should be the last end of added text");
Clear();
/****************************************************************************
* Case 2
****************************************************************************/
// Replacing text in around end of added text (becomes shorter) (not sure
// if actually occurs)
MergeWith(TextChangeData(50, 50, 55, false, false));
MergeWith(TextChangeData(53, 60, 54, false, false));
MOZ_ASSERT(mStartOffset == 50,
"Test 2-1-1: mStartOffset should be the smallest offset");
MOZ_ASSERT(mRemovedEndOffset == 55, // 60 - (55 - 50)
"Test 2-1-2: mRemovedEndOffset should be the the last end of "
"removed text "
"without already added text length");
MOZ_ASSERT(
mAddedEndOffset == 54,
"Test 2-1-3: mAddedEndOffset should be the last end of added text");
Clear();
// Replacing text around end of added text (becomes longer) (not sure
// if actually occurs)
MergeWith(TextChangeData(50, 50, 55, false, false));
MergeWith(TextChangeData(54, 62, 68, false, false));
MOZ_ASSERT(mStartOffset == 50,
"Test 2-2-1: mStartOffset should be the smallest offset");
MOZ_ASSERT(mRemovedEndOffset == 57, // 62 - (55 - 50)
"Test 2-2-2: mRemovedEndOffset should be the the last end of "
"removed text "
"without already added text length");
MOZ_ASSERT(
mAddedEndOffset == 68,
"Test 2-2-3: mAddedEndOffset should be the last end of added text");
Clear();
// Replacing text around end of replaced text (became shorter) (not sure if
// actually occurs)
MergeWith(TextChangeData(36, 48, 45, false, false));
MergeWith(TextChangeData(43, 50, 49, false, false));
MOZ_ASSERT(mStartOffset == 36,
"Test 2-3-1: mStartOffset should be the smallest offset");
MOZ_ASSERT(mRemovedEndOffset == 53, // 50 - (45 - 48)
"Test 2-3-2: mRemovedEndOffset should be the the last end of "
"removed text "
"without already removed text length");
MOZ_ASSERT(
mAddedEndOffset == 49,
"Test 2-3-3: mAddedEndOffset should be the last end of added text");
Clear();
// Replacing text around end of replaced text (became longer) (not sure if
// actually occurs)
MergeWith(TextChangeData(36, 52, 53, false, false));
MergeWith(TextChangeData(43, 68, 61, false, false));
MOZ_ASSERT(mStartOffset == 36,
"Test 2-4-1: mStartOffset should be the smallest offset");
MOZ_ASSERT(mRemovedEndOffset == 67, // 68 - (53 - 52)
"Test 2-4-2: mRemovedEndOffset should be the the last end of "
"removed text "
"without already added text length");
MOZ_ASSERT(
mAddedEndOffset == 61,
"Test 2-4-3: mAddedEndOffset should be the last end of added text");
Clear();
/****************************************************************************
* Case 3
****************************************************************************/
// Appending text in already added text (not sure if actually occurs)
MergeWith(TextChangeData(10, 10, 20, false, false));
MergeWith(TextChangeData(15, 15, 30, false, false));
MOZ_ASSERT(mStartOffset == 10,
"Test 3-1-1: mStartOffset should be the smallest offset");
MOZ_ASSERT(mRemovedEndOffset == 10,
"Test 3-1-2: mRemovedEndOffset should be the the first end of "
"removed text");
MOZ_ASSERT(
mAddedEndOffset == 35, // 20 + (30 - 15)
"Test 3-1-3: mAddedEndOffset should be the first end of added text with "
"added text length by the new change");
Clear();
// Replacing text in added text (not sure if actually occurs)
MergeWith(TextChangeData(50, 50, 55, false, false));
MergeWith(TextChangeData(52, 53, 56, false, false));
MOZ_ASSERT(mStartOffset == 50,
"Test 3-2-1: mStartOffset should be the smallest offset");
MOZ_ASSERT(mRemovedEndOffset == 50,
"Test 3-2-2: mRemovedEndOffset should be the the first end of "
"removed text");
MOZ_ASSERT(
mAddedEndOffset == 58, // 55 + (56 - 53)
"Test 3-2-3: mAddedEndOffset should be the first end of added text with "
"added text length by the new change");
Clear();
// Replacing text in replaced text (became shorter) (not sure if actually
// occurs)
MergeWith(TextChangeData(36, 48, 45, false, false));
MergeWith(TextChangeData(37, 38, 50, false, false));
MOZ_ASSERT(mStartOffset == 36,
"Test 3-3-1: mStartOffset should be the smallest offset");
MOZ_ASSERT(mRemovedEndOffset == 48,
"Test 3-3-2: mRemovedEndOffset should be the the first end of "
"removed text");
MOZ_ASSERT(
mAddedEndOffset == 57, // 45 + (50 - 38)
"Test 3-3-3: mAddedEndOffset should be the first end of added text with "
"added text length by the new change");
Clear();
// Replacing text in replaced text (became longer) (not sure if actually
// occurs)
MergeWith(TextChangeData(32, 48, 53, false, false));
MergeWith(TextChangeData(43, 50, 52, false, false));
MOZ_ASSERT(mStartOffset == 32,
"Test 3-4-1: mStartOffset should be the smallest offset");
MOZ_ASSERT(mRemovedEndOffset == 48,
"Test 3-4-2: mRemovedEndOffset should be the the last end of "
"removed text "
"without already added text length");
MOZ_ASSERT(
mAddedEndOffset == 55, // 53 + (52 - 50)
"Test 3-4-3: mAddedEndOffset should be the first end of added text with "
"added text length by the new change");
Clear();
// Replacing text in replaced text (became shorter) (not sure if actually
// occurs)
MergeWith(TextChangeData(36, 48, 50, false, false));
MergeWith(TextChangeData(37, 49, 47, false, false));
MOZ_ASSERT(mStartOffset == 36,
"Test 3-5-1: mStartOffset should be the smallest offset");
MOZ_ASSERT(
mRemovedEndOffset == 48,
"Test 3-5-2: mRemovedEndOffset should be the the first end of removed "
"text");
MOZ_ASSERT(mAddedEndOffset == 48, // 50 + (47 - 49)
"Test 3-5-3: mAddedEndOffset should be the first end of added "
"text without "
"removed text length by the new change");
Clear();
// Replacing text in replaced text (became longer) (not sure if actually
// occurs)
MergeWith(TextChangeData(32, 48, 53, false, false));
MergeWith(TextChangeData(43, 50, 47, false, false));
MOZ_ASSERT(mStartOffset == 32,
"Test 3-6-1: mStartOffset should be the smallest offset");
MOZ_ASSERT(mRemovedEndOffset == 48,
"Test 3-6-2: mRemovedEndOffset should be the the last end of "
"removed text "
"without already added text length");
MOZ_ASSERT(mAddedEndOffset == 50, // 53 + (47 - 50)
"Test 3-6-3: mAddedEndOffset should be the first end of added "
"text without "
"removed text length by the new change");
Clear();
/****************************************************************************
* Case 4
****************************************************************************/
// Replacing text all of already append text (not sure if actually occurs)
MergeWith(TextChangeData(50, 50, 55, false, false));
MergeWith(TextChangeData(44, 66, 68, false, false));
MOZ_ASSERT(mStartOffset == 44,
"Test 4-1-1: mStartOffset should be the smallest offset");
MOZ_ASSERT(mRemovedEndOffset == 61, // 66 - (55 - 50)
"Test 4-1-2: mRemovedEndOffset should be the the last end of "
"removed text "
"without already added text length");
MOZ_ASSERT(
mAddedEndOffset == 68,
"Test 4-1-3: mAddedEndOffset should be the last end of added text");
Clear();
// Replacing text around a point in which text was removed (not sure if
// actually occurs)
MergeWith(TextChangeData(50, 62, 50, false, false));
MergeWith(TextChangeData(44, 66, 68, false, false));
MOZ_ASSERT(mStartOffset == 44,
"Test 4-2-1: mStartOffset should be the smallest offset");
MOZ_ASSERT(mRemovedEndOffset == 78, // 66 - (50 - 62)
"Test 4-2-2: mRemovedEndOffset should be the the last end of "
"removed text "
"without already removed text length");
MOZ_ASSERT(
mAddedEndOffset == 68,
"Test 4-2-3: mAddedEndOffset should be the last end of added text");
Clear();
// Replacing text all replaced text (became shorter) (not sure if actually
// occurs)
MergeWith(TextChangeData(50, 62, 60, false, false));
MergeWith(TextChangeData(49, 128, 130, false, false));
MOZ_ASSERT(mStartOffset == 49,
"Test 4-3-1: mStartOffset should be the smallest offset");
MOZ_ASSERT(mRemovedEndOffset == 130, // 128 - (60 - 62)
"Test 4-3-2: mRemovedEndOffset should be the the last end of "
"removed text "
"without already removed text length");
MOZ_ASSERT(
mAddedEndOffset == 130,
"Test 4-3-3: mAddedEndOffset should be the last end of added text");
Clear();
// Replacing text all replaced text (became longer) (not sure if actually
// occurs)
MergeWith(TextChangeData(50, 61, 73, false, false));
MergeWith(TextChangeData(44, 100, 50, false, false));
MOZ_ASSERT(mStartOffset == 44,
"Test 4-4-1: mStartOffset should be the smallest offset");
MOZ_ASSERT(mRemovedEndOffset == 88, // 100 - (73 - 61)
"Test 4-4-2: mRemovedEndOffset should be the the last end of "
"removed text "
"with already added text length");
MOZ_ASSERT(
mAddedEndOffset == 50,
"Test 4-4-3: mAddedEndOffset should be the last end of added text");
Clear();
/****************************************************************************
* Case 5
****************************************************************************/
// Replacing text around start of added text (not sure if actually occurs)
MergeWith(TextChangeData(50, 50, 55, false, false));
MergeWith(TextChangeData(48, 52, 49, false, false));
MOZ_ASSERT(mStartOffset == 48,
"Test 5-1-1: mStartOffset should be the smallest offset");
MOZ_ASSERT(
mRemovedEndOffset == 50,
"Test 5-1-2: mRemovedEndOffset should be the the first end of removed "
"text");
MOZ_ASSERT(
mAddedEndOffset == 52, // 55 + (52 - 49)
"Test 5-1-3: mAddedEndOffset should be the first end of added text with "
"added text length by the new change");
Clear();
// Replacing text around start of replaced text (became shorter) (not sure if
// actually occurs)
MergeWith(TextChangeData(50, 60, 58, false, false));
MergeWith(TextChangeData(43, 50, 48, false, false));
MOZ_ASSERT(mStartOffset == 43,
"Test 5-2-1: mStartOffset should be the smallest offset");
MOZ_ASSERT(
mRemovedEndOffset == 60,
"Test 5-2-2: mRemovedEndOffset should be the the first end of removed "
"text");
MOZ_ASSERT(mAddedEndOffset == 56, // 58 + (48 - 50)
"Test 5-2-3: mAddedEndOffset should be the first end of added "
"text without "
"removed text length by the new change");
Clear();
// Replacing text around start of replaced text (became longer) (not sure if
// actually occurs)
MergeWith(TextChangeData(50, 60, 68, false, false));
MergeWith(TextChangeData(43, 55, 53, false, false));
MOZ_ASSERT(mStartOffset == 43,
"Test 5-3-1: mStartOffset should be the smallest offset");
MOZ_ASSERT(
mRemovedEndOffset == 60,
"Test 5-3-2: mRemovedEndOffset should be the the first end of removed "
"text");
MOZ_ASSERT(mAddedEndOffset == 66, // 68 + (53 - 55)
"Test 5-3-3: mAddedEndOffset should be the first end of added "
"text without "
"removed text length by the new change");
Clear();
// Replacing text around start of replaced text (became shorter) (not sure if
// actually occurs)
MergeWith(TextChangeData(50, 60, 58, false, false));
MergeWith(TextChangeData(43, 50, 128, false, false));
MOZ_ASSERT(mStartOffset == 43,
"Test 5-4-1: mStartOffset should be the smallest offset");
MOZ_ASSERT(
mRemovedEndOffset == 60,
"Test 5-4-2: mRemovedEndOffset should be the the first end of removed "
"text");
MOZ_ASSERT(
mAddedEndOffset == 136, // 58 + (128 - 50)
"Test 5-4-3: mAddedEndOffset should be the first end of added text with "
"added text length by the new change");
Clear();
// Replacing text around start of replaced text (became longer) (not sure if
// actually occurs)
MergeWith(TextChangeData(50, 60, 68, false, false));
MergeWith(TextChangeData(43, 55, 65, false, false));
MOZ_ASSERT(mStartOffset == 43,
"Test 5-5-1: mStartOffset should be the smallest offset");
MOZ_ASSERT(
mRemovedEndOffset == 60,
"Test 5-5-2: mRemovedEndOffset should be the the first end of removed "
"text");
MOZ_ASSERT(
mAddedEndOffset == 78, // 68 + (65 - 55)
"Test 5-5-3: mAddedEndOffset should be the first end of added text with "
"added text length by the new change");
Clear();
/****************************************************************************
* Case 6
****************************************************************************/
// Appending text before already added text (not sure if actually occurs)
MergeWith(TextChangeData(30, 30, 45, false, false));
MergeWith(TextChangeData(10, 10, 20, false, false));
MOZ_ASSERT(mStartOffset == 10,
"Test 6-1-1: mStartOffset should be the smallest offset");
MOZ_ASSERT(
mRemovedEndOffset == 30,
"Test 6-1-2: mRemovedEndOffset should be the the largest end of removed "
"text");
MOZ_ASSERT(
mAddedEndOffset == 55, // 45 + (20 - 10)
"Test 6-1-3: mAddedEndOffset should be the first end of added text with "
"added text length by the new change");
Clear();
// Removing text before already removed text (not sure if actually occurs)
MergeWith(TextChangeData(30, 35, 30, false, false));
MergeWith(TextChangeData(10, 25, 10, false, false));
MOZ_ASSERT(mStartOffset == 10,
"Test 6-2-1: mStartOffset should be the smallest offset");
MOZ_ASSERT(
mRemovedEndOffset == 35,
"Test 6-2-2: mRemovedEndOffset should be the the largest end of removed "
"text");
MOZ_ASSERT(
mAddedEndOffset == 15, // 30 - (25 - 10)
"Test 6-2-3: mAddedEndOffset should be the first end of added text with "
"removed text length by the new change");
Clear();
// Replacing text before already replaced text (not sure if actually occurs)
MergeWith(TextChangeData(50, 65, 70, false, false));
MergeWith(TextChangeData(13, 24, 15, false, false));
MOZ_ASSERT(mStartOffset == 13,
"Test 6-3-1: mStartOffset should be the smallest offset");
MOZ_ASSERT(
mRemovedEndOffset == 65,
"Test 6-3-2: mRemovedEndOffset should be the the largest end of removed "
"text");
MOZ_ASSERT(mAddedEndOffset == 61, // 70 + (15 - 24)
"Test 6-3-3: mAddedEndOffset should be the first end of added "
"text without "
"removed text length by the new change");
Clear();
// Replacing text before already replaced text (not sure if actually occurs)
MergeWith(TextChangeData(50, 65, 70, false, false));
MergeWith(TextChangeData(13, 24, 36, false, false));
MOZ_ASSERT(mStartOffset == 13,
"Test 6-4-1: mStartOffset should be the smallest offset");
MOZ_ASSERT(
mRemovedEndOffset == 65,
"Test 6-4-2: mRemovedEndOffset should be the the largest end of removed "
"text");
MOZ_ASSERT(mAddedEndOffset == 82, // 70 + (36 - 24)
"Test 6-4-3: mAddedEndOffset should be the first end of added "
"text without "
"removed text length by the new change");
Clear();
}
#endif // #ifdef DEBUG
} // namespace mozilla::widget
#ifdef DEBUG
//////////////////////////////////////////////////////////////
//
// Convert a GUI event message code to a string.
// Makes it a lot easier to debug events.
//
// See gtk/nsWidget.cpp and windows/nsWindow.cpp
// for a DebugPrintEvent() function that uses
// this.
//
//////////////////////////////////////////////////////////////
/* static */
nsAutoString nsBaseWidget::debug_GuiEventToString(WidgetGUIEvent* aGuiEvent) {
NS_ASSERTION(nullptr != aGuiEvent, "cmon, null gui event.");
nsAutoString eventName(u"UNKNOWN"_ns);
# define _ASSIGN_eventName(_value, _name) \
case _value: \
eventName.AssignLiteral(_name); \
break
switch (aGuiEvent->mMessage) {
_ASSIGN_eventName(eBlur, "eBlur");
_ASSIGN_eventName(eDrop, "eDrop");
_ASSIGN_eventName(eDragEnter, "eDragEnter");
_ASSIGN_eventName(eDragExit, "eDragExit");
_ASSIGN_eventName(eDragOver, "eDragOver");
_ASSIGN_eventName(eEditorInput, "eEditorInput");
_ASSIGN_eventName(eFocus, "eFocus");
_ASSIGN_eventName(eFocusIn, "eFocusIn");
_ASSIGN_eventName(eFocusOut, "eFocusOut");
_ASSIGN_eventName(eFormSelect, "eFormSelect");
_ASSIGN_eventName(eFormChange, "eFormChange");
_ASSIGN_eventName(eFormReset, "eFormReset");
_ASSIGN_eventName(eFormSubmit, "eFormSubmit");
_ASSIGN_eventName(eImageAbort, "eImageAbort");
_ASSIGN_eventName(eLoadError, "eLoadError");
_ASSIGN_eventName(eKeyDown, "eKeyDown");
_ASSIGN_eventName(eKeyPress, "eKeyPress");
_ASSIGN_eventName(eKeyUp, "eKeyUp");
_ASSIGN_eventName(eMouseEnterIntoWidget, "eMouseEnterIntoWidget");
_ASSIGN_eventName(eMouseExitFromWidget, "eMouseExitFromWidget");
_ASSIGN_eventName(eMouseDown, "eMouseDown");
_ASSIGN_eventName(eMouseUp, "eMouseUp");
_ASSIGN_eventName(eMouseClick, "eMouseClick");
_ASSIGN_eventName(eMouseAuxClick, "eMouseAuxClick");
_ASSIGN_eventName(eMouseDoubleClick, "eMouseDoubleClick");
_ASSIGN_eventName(eMouseMove, "eMouseMove");
_ASSIGN_eventName(eLoad, "eLoad");
_ASSIGN_eventName(ePopState, "ePopState");
_ASSIGN_eventName(eBeforeScriptExecute, "eBeforeScriptExecute");
_ASSIGN_eventName(eAfterScriptExecute, "eAfterScriptExecute");
_ASSIGN_eventName(eUnload, "eUnload");
_ASSIGN_eventName(eHashChange, "eHashChange");
_ASSIGN_eventName(eReadyStateChange, "eReadyStateChange");
_ASSIGN_eventName(eXULBroadcast, "eXULBroadcast");
_ASSIGN_eventName(eXULCommandUpdate, "eXULCommandUpdate");
# undef _ASSIGN_eventName
default: {
eventName.AssignLiteral("UNKNOWN: ");
eventName.AppendInt(aGuiEvent->mMessage);
} break;
}
return nsAutoString(eventName);
}
//////////////////////////////////////////////////////////////
//
// Code to deal with paint and event debug prefs.
//
//////////////////////////////////////////////////////////////
struct PrefPair {
const char* name;
bool value;
};
static PrefPair debug_PrefValues[] = {
{"nglayout.debug.crossing_event_dumping", false},
{"nglayout.debug.event_dumping", false},
{"nglayout.debug.invalidate_dumping", false},
{"nglayout.debug.motion_event_dumping", false},
{"nglayout.debug.paint_dumping", false}};
//////////////////////////////////////////////////////////////
bool nsBaseWidget::debug_GetCachedBoolPref(const char* aPrefName) {
NS_ASSERTION(nullptr != aPrefName, "cmon, pref name is null.");
for (uint32_t i = 0; i < ArrayLength(debug_PrefValues); i++) {
if (strcmp(debug_PrefValues[i].name, aPrefName) == 0) {
return debug_PrefValues[i].value;
}
}
return false;
}
//////////////////////////////////////////////////////////////
static void debug_SetCachedBoolPref(const char* aPrefName, bool aValue) {
NS_ASSERTION(nullptr != aPrefName, "cmon, pref name is null.");
for (uint32_t i = 0; i < ArrayLength(debug_PrefValues); i++) {
if (strcmp(debug_PrefValues[i].name, aPrefName) == 0) {
debug_PrefValues[i].value = aValue;
return;
}
}
NS_ASSERTION(false, "cmon, this code is not reached dude.");
}
//////////////////////////////////////////////////////////////
class Debug_PrefObserver final : public nsIObserver {
~Debug_PrefObserver() = default;
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIOBSERVER
};
NS_IMPL_ISUPPORTS(Debug_PrefObserver, nsIObserver)
NS_IMETHODIMP
Debug_PrefObserver::Observe(nsISupports* subject, const char* topic,
const char16_t* data) {
NS_ConvertUTF16toUTF8 prefName(data);
bool value = Preferences::GetBool(prefName.get(), false);
debug_SetCachedBoolPref(prefName.get(), value);
return NS_OK;
}
//////////////////////////////////////////////////////////////
/* static */ void debug_RegisterPrefCallbacks() {
static bool once = true;
if (!once) {
return;
}
once = false;
nsCOMPtr<nsIObserver> obs(new Debug_PrefObserver());
for (uint32_t i = 0; i < ArrayLength(debug_PrefValues); i++) {
// Initialize the pref values
debug_PrefValues[i].value =
Preferences::GetBool(debug_PrefValues[i].name, false);
if (obs) {
// Register callbacks for when these change
nsCString name;
name.AssignLiteral(debug_PrefValues[i].name,
strlen(debug_PrefValues[i].name));
Preferences::AddStrongObserver(obs, name);
}
}
}
//////////////////////////////////////////////////////////////
static int32_t _GetPrintCount() {
static int32_t sCount = 0;
return ++sCount;
}
//////////////////////////////////////////////////////////////
/* static */
void nsBaseWidget::debug_DumpEvent(FILE* aFileOut, nsIWidget* aWidget,
WidgetGUIEvent* aGuiEvent,
const char* aWidgetName, int32_t aWindowID) {
if (aGuiEvent->mMessage == eMouseMove) {
if (!debug_GetCachedBoolPref("nglayout.debug.motion_event_dumping")) return;
}
if (aGuiEvent->mMessage == eMouseEnterIntoWidget ||
aGuiEvent->mMessage == eMouseExitFromWidget) {
if (!debug_GetCachedBoolPref("nglayout.debug.crossing_event_dumping"))
return;
}
if (!debug_GetCachedBoolPref("nglayout.debug.event_dumping")) return;
NS_LossyConvertUTF16toASCII tempString(
debug_GuiEventToString(aGuiEvent).get());
fprintf(aFileOut, "%4d %-26s widget=%-8p name=%-12s id=0x%-6x refpt=%d,%d\n",
_GetPrintCount(), tempString.get(), (void*)aWidget, aWidgetName,
aWindowID, aGuiEvent->mRefPoint.x.value,
aGuiEvent->mRefPoint.y.value);
}
//////////////////////////////////////////////////////////////
/* static */
void nsBaseWidget::debug_DumpPaintEvent(FILE* aFileOut, nsIWidget* aWidget,
const nsIntRegion& aRegion,
const char* aWidgetName,
int32_t aWindowID) {
NS_ASSERTION(nullptr != aFileOut, "cmon, null output FILE");
NS_ASSERTION(nullptr != aWidget, "cmon, the widget is null");
if (!debug_GetCachedBoolPref("nglayout.debug.paint_dumping")) return;
nsIntRect rect = aRegion.GetBounds();
fprintf(aFileOut,
"%4d PAINT widget=%p name=%-12s id=0x%-6x bounds-rect=%3d,%-3d "
"%3d,%-3d",
_GetPrintCount(), (void*)aWidget, aWidgetName, aWindowID, rect.X(),
rect.Y(), rect.Width(), rect.Height());
fprintf(aFileOut, "\n");
}
//////////////////////////////////////////////////////////////
/* static */
void nsBaseWidget::debug_DumpInvalidate(FILE* aFileOut, nsIWidget* aWidget,
const LayoutDeviceIntRect* aRect,
const char* aWidgetName,
int32_t aWindowID) {
if (!debug_GetCachedBoolPref("nglayout.debug.invalidate_dumping")) return;
NS_ASSERTION(nullptr != aFileOut, "cmon, null output FILE");
NS_ASSERTION(nullptr != aWidget, "cmon, the widget is null");
fprintf(aFileOut, "%4d Invalidate widget=%p name=%-12s id=0x%-6x",
_GetPrintCount(), (void*)aWidget, aWidgetName, aWindowID);
if (aRect) {
fprintf(aFileOut, " rect=%3d,%-3d %3d,%-3d", aRect->X(), aRect->Y(),
aRect->Width(), aRect->Height());
} else {
fprintf(aFileOut, " rect=%-15s", "none");
}
fprintf(aFileOut, "\n");
}
//////////////////////////////////////////////////////////////
#endif // DEBUG
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