mirror of
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15adf94f4d
This introduces the machinery needed to generate crash annotations from a YAML file. The relevant C++ functions are updated to take a typed enum. JavaScript calls are unaffected but they will throw if the string argument does not correspond to one of the known entries in the C++ enum. The existing whitelists and blacklists of annotations are also generated from the YAML file and all duplicate code related to them has been consolidated. Once written out to the .extra file the annotations are converted in string form and are no different than the existing ones. All existing annotations have been included in the list (and some obsolete ones have been removed) and all call sites have been updated including tests where appropriate. --HG-- extra : source : 4f6c43f2830701ec5552e08e3f1b06fe6d045860
900 lines
26 KiB
C++
900 lines
26 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsLayoutStylesheetCache.h"
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#include "nsAppDirectoryServiceDefs.h"
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#include "mozilla/StyleSheetInlines.h"
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#include "mozilla/MemoryReporting.h"
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#include "mozilla/Omnijar.h"
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#include "mozilla/Preferences.h"
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#include "mozilla/StyleSheet.h"
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#include "mozilla/StyleSheetInlines.h"
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#include "mozilla/Telemetry.h"
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#include "mozilla/css/Loader.h"
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#include "mozilla/dom/SRIMetadata.h"
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#include "MainThreadUtils.h"
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#include "nsColor.h"
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#include "nsDirectoryServiceDefs.h"
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#include "nsDirectoryService.h"
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#include "nsExceptionHandler.h"
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#include "nsIChromeRegistry.h"
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#include "nsIConsoleService.h"
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#include "nsIFile.h"
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#include "nsIObserverService.h"
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#include "nsISimpleEnumerator.h"
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#include "nsISubstitutingProtocolHandler.h"
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#include "nsIXULRuntime.h"
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#include "nsNetUtil.h"
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#include "nsPresContext.h"
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#include "nsPrintfCString.h"
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#include "nsServiceManagerUtils.h"
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#include "nsXULAppAPI.h"
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#include "nsZipArchive.h"
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#include "zlib.h"
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using namespace mozilla;
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using namespace mozilla::css;
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NS_IMPL_ISUPPORTS(
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nsLayoutStylesheetCache, nsIObserver, nsIMemoryReporter)
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nsresult
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nsLayoutStylesheetCache::Observe(nsISupports* aSubject,
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const char* aTopic,
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const char16_t* aData)
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{
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if (!strcmp(aTopic, "profile-before-change")) {
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mUserContentSheet = nullptr;
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mUserChromeSheet = nullptr;
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}
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else if (!strcmp(aTopic, "profile-do-change")) {
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InitFromProfile();
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}
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else if (strcmp(aTopic, "chrome-flush-skin-caches") == 0 ||
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strcmp(aTopic, "chrome-flush-caches") == 0) {
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mScrollbarsSheet = nullptr;
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mFormsSheet = nullptr;
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}
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else {
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MOZ_ASSERT_UNREACHABLE("Unexpected observer topic.");
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}
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return NS_OK;
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}
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StyleSheet*
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nsLayoutStylesheetCache::ScrollbarsSheet()
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{
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if (!mScrollbarsSheet) {
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// Scrollbars don't need access to unsafe rules
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LoadSheetURL("chrome://global/skin/scrollbars.css",
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&mScrollbarsSheet, eSafeAgentSheetFeatures, eCrash);
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}
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return mScrollbarsSheet;
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}
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StyleSheet*
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nsLayoutStylesheetCache::FormsSheet()
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{
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if (!mFormsSheet) {
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// forms.css needs access to unsafe rules
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LoadSheetURL("resource://gre-resources/forms.css",
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&mFormsSheet, eAgentSheetFeatures, eCrash);
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}
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return mFormsSheet;
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}
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StyleSheet*
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nsLayoutStylesheetCache::UserContentSheet()
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{
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return mUserContentSheet;
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}
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StyleSheet*
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nsLayoutStylesheetCache::UserChromeSheet()
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{
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return mUserChromeSheet;
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}
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StyleSheet*
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nsLayoutStylesheetCache::UASheet()
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{
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if (!mUASheet) {
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LoadSheetURL("resource://gre-resources/ua.css",
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&mUASheet, eAgentSheetFeatures, eCrash);
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}
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return mUASheet;
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}
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StyleSheet*
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nsLayoutStylesheetCache::HTMLSheet()
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{
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return mHTMLSheet;
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}
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StyleSheet*
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nsLayoutStylesheetCache::MinimalXULSheet()
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{
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return mMinimalXULSheet;
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}
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StyleSheet*
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nsLayoutStylesheetCache::XULSheet()
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{
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if (!mXULSheet) {
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LoadSheetURL("chrome://global/content/xul.css",
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&mXULSheet, eAgentSheetFeatures, eCrash);
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}
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return mXULSheet;
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}
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StyleSheet*
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nsLayoutStylesheetCache::XULComponentsSheet()
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{
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if (!mXULComponentsSheet) {
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LoadSheetURL("chrome://global/content/components.css",
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&mXULComponentsSheet, eAgentSheetFeatures, eCrash);
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}
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return mXULComponentsSheet;
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}
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StyleSheet*
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nsLayoutStylesheetCache::QuirkSheet()
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{
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return mQuirkSheet;
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}
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StyleSheet*
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nsLayoutStylesheetCache::SVGSheet()
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{
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return mSVGSheet;
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}
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StyleSheet*
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nsLayoutStylesheetCache::MathMLSheet()
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{
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if (!mMathMLSheet) {
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LoadSheetURL("resource://gre-resources/mathml.css",
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&mMathMLSheet, eAgentSheetFeatures, eCrash);
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}
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return mMathMLSheet;
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}
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StyleSheet*
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nsLayoutStylesheetCache::CounterStylesSheet()
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{
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return mCounterStylesSheet;
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}
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StyleSheet*
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nsLayoutStylesheetCache::NoScriptSheet()
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{
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if (!mNoScriptSheet) {
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LoadSheetURL("resource://gre-resources/noscript.css",
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&mNoScriptSheet, eAgentSheetFeatures, eCrash);
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}
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return mNoScriptSheet;
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}
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StyleSheet*
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nsLayoutStylesheetCache::NoFramesSheet()
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{
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if (!mNoFramesSheet) {
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LoadSheetURL("resource://gre-resources/noframes.css",
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&mNoFramesSheet, eAgentSheetFeatures, eCrash);
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}
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return mNoFramesSheet;
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}
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StyleSheet*
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nsLayoutStylesheetCache::ChromePreferenceSheet(nsPresContext* aPresContext)
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{
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if (!mChromePreferenceSheet) {
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BuildPreferenceSheet(&mChromePreferenceSheet, aPresContext);
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}
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return mChromePreferenceSheet;
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}
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StyleSheet*
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nsLayoutStylesheetCache::ContentPreferenceSheet(nsPresContext* aPresContext)
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{
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if (!mContentPreferenceSheet) {
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BuildPreferenceSheet(&mContentPreferenceSheet, aPresContext);
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}
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return mContentPreferenceSheet;
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}
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StyleSheet*
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nsLayoutStylesheetCache::ContentEditableSheet()
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{
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if (!mContentEditableSheet) {
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LoadSheetURL("resource://gre/res/contenteditable.css",
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&mContentEditableSheet, eAgentSheetFeatures, eCrash);
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}
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return mContentEditableSheet;
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}
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StyleSheet*
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nsLayoutStylesheetCache::DesignModeSheet()
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{
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if (!mDesignModeSheet) {
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LoadSheetURL("resource://gre/res/designmode.css",
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&mDesignModeSheet, eAgentSheetFeatures, eCrash);
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}
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return mDesignModeSheet;
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}
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void
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nsLayoutStylesheetCache::Shutdown()
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{
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gCSSLoader = nullptr;
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NS_WARNING_ASSERTION(!gStyleCache || !gUserContentSheetURL,
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"Got the URL but never used?");
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gStyleCache = nullptr;
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gUserContentSheetURL = nullptr;
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}
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void
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nsLayoutStylesheetCache::SetUserContentCSSURL(nsIURI* aURI)
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{
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MOZ_ASSERT(XRE_IsContentProcess(), "Only used in content processes.");
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gUserContentSheetURL = aURI;
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}
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MOZ_DEFINE_MALLOC_SIZE_OF(LayoutStylesheetCacheMallocSizeOf)
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NS_IMETHODIMP
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nsLayoutStylesheetCache::CollectReports(nsIHandleReportCallback* aHandleReport,
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nsISupports* aData, bool aAnonymize)
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{
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MOZ_COLLECT_REPORT(
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"explicit/layout/style-sheet-cache", KIND_HEAP, UNITS_BYTES,
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SizeOfIncludingThis(LayoutStylesheetCacheMallocSizeOf),
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"Memory used for some built-in style sheets.");
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return NS_OK;
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}
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size_t
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nsLayoutStylesheetCache::SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
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{
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size_t n = aMallocSizeOf(this);
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#define MEASURE(s) n += s ? s->SizeOfIncludingThis(aMallocSizeOf) : 0;
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MEASURE(mChromePreferenceSheet);
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MEASURE(mContentEditableSheet);
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MEASURE(mContentPreferenceSheet);
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MEASURE(mCounterStylesSheet);
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MEASURE(mDesignModeSheet);
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MEASURE(mFormsSheet);
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MEASURE(mHTMLSheet);
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MEASURE(mMathMLSheet);
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MEASURE(mMinimalXULSheet);
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MEASURE(mNoFramesSheet);
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MEASURE(mNoScriptSheet);
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MEASURE(mQuirkSheet);
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MEASURE(mSVGSheet);
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MEASURE(mScrollbarsSheet);
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MEASURE(mUASheet);
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MEASURE(mUserChromeSheet);
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MEASURE(mUserContentSheet);
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MEASURE(mXULSheet);
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MEASURE(mXULComponentsSheet);
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// Measurement of the following members may be added later if DMD finds it is
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// worthwhile:
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// - gCSSLoader
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return n;
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}
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nsLayoutStylesheetCache::nsLayoutStylesheetCache()
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{
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nsCOMPtr<nsIObserverService> obsSvc =
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mozilla::services::GetObserverService();
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NS_ASSERTION(obsSvc, "No global observer service?");
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if (obsSvc) {
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obsSvc->AddObserver(this, "profile-before-change", false);
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obsSvc->AddObserver(this, "profile-do-change", false);
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obsSvc->AddObserver(this, "chrome-flush-skin-caches", false);
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obsSvc->AddObserver(this, "chrome-flush-caches", false);
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}
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InitFromProfile();
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// And make sure that we load our UA sheets. No need to do this
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// per-profile, since they're profile-invariant.
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LoadSheetURL("resource://gre-resources/counterstyles.css",
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&mCounterStylesSheet, eAgentSheetFeatures, eCrash);
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LoadSheetURL("resource://gre-resources/html.css",
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&mHTMLSheet, eAgentSheetFeatures, eCrash);
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LoadSheetURL("chrome://global/content/minimal-xul.css",
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&mMinimalXULSheet, eAgentSheetFeatures, eCrash);
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LoadSheetURL("resource://gre-resources/quirk.css",
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&mQuirkSheet, eAgentSheetFeatures, eCrash);
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LoadSheetURL("resource://gre/res/svg.css",
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&mSVGSheet, eAgentSheetFeatures, eCrash);
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if (XRE_IsParentProcess()) {
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// We know we need xul.css for the UI, so load that now too:
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XULSheet();
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XULComponentsSheet();
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}
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if (gUserContentSheetURL) {
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MOZ_ASSERT(XRE_IsContentProcess(), "Only used in content processes.");
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LoadSheet(gUserContentSheetURL, &mUserContentSheet,
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eUserSheetFeatures, eLogToConsole);
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gUserContentSheetURL = nullptr;
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}
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// The remaining sheets are created on-demand do to their use being rarer
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// (which helps save memory for Firefox OS apps) or because they need to
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// be re-loadable in DependentPrefChanged.
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}
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nsLayoutStylesheetCache::~nsLayoutStylesheetCache()
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{
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mozilla::UnregisterWeakMemoryReporter(this);
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}
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void
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nsLayoutStylesheetCache::InitMemoryReporter()
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{
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mozilla::RegisterWeakMemoryReporter(this);
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}
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/* static */ nsLayoutStylesheetCache*
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nsLayoutStylesheetCache::Singleton()
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{
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MOZ_ASSERT(NS_IsMainThread());
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if (!gStyleCache) {
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gStyleCache = new nsLayoutStylesheetCache;
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gStyleCache->InitMemoryReporter();
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// For each pref that controls a CSS feature that a UA style sheet depends
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// on (such as a pref that enables a property that a UA style sheet uses),
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// register DependentPrefChanged as a callback to ensure that the relevant
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// style sheets will be re-parsed.
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// Preferences::RegisterCallback(&DependentPrefChanged,
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// "layout.css.example-pref.enabled");
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}
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return gStyleCache;
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}
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void
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nsLayoutStylesheetCache::InitFromProfile()
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{
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nsCOMPtr<nsIXULRuntime> appInfo = do_GetService("@mozilla.org/xre/app-info;1");
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if (appInfo) {
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bool inSafeMode = false;
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appInfo->GetInSafeMode(&inSafeMode);
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if (inSafeMode)
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return;
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}
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nsCOMPtr<nsIFile> contentFile;
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nsCOMPtr<nsIFile> chromeFile;
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NS_GetSpecialDirectory(NS_APP_USER_CHROME_DIR,
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getter_AddRefs(contentFile));
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if (!contentFile) {
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// if we don't have a profile yet, that's OK!
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return;
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}
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contentFile->Clone(getter_AddRefs(chromeFile));
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if (!chromeFile) return;
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contentFile->Append(NS_LITERAL_STRING("userContent.css"));
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chromeFile->Append(NS_LITERAL_STRING("userChrome.css"));
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LoadSheetFile(contentFile, &mUserContentSheet, eUserSheetFeatures, eLogToConsole);
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LoadSheetFile(chromeFile, &mUserChromeSheet, eUserSheetFeatures, eLogToConsole);
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if (XRE_IsParentProcess()) {
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// We're interested specifically in potential chrome customizations,
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// so we only need data points from the parent process
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Telemetry::Accumulate(Telemetry::USER_CHROME_CSS_LOADED, mUserChromeSheet != nullptr);
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}
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}
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void
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nsLayoutStylesheetCache::LoadSheetURL(const char* aURL,
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RefPtr<StyleSheet>* aSheet,
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SheetParsingMode aParsingMode,
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FailureAction aFailureAction)
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{
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nsCOMPtr<nsIURI> uri;
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NS_NewURI(getter_AddRefs(uri), aURL);
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LoadSheet(uri, aSheet, aParsingMode, aFailureAction);
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if (!aSheet) {
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NS_ERROR(nsPrintfCString("Could not load %s", aURL).get());
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}
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}
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void
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nsLayoutStylesheetCache::LoadSheetFile(nsIFile* aFile,
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RefPtr<StyleSheet>* aSheet,
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SheetParsingMode aParsingMode,
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FailureAction aFailureAction)
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{
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bool exists = false;
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aFile->Exists(&exists);
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if (!exists) return;
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nsCOMPtr<nsIURI> uri;
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NS_NewFileURI(getter_AddRefs(uri), aFile);
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LoadSheet(uri, aSheet, aParsingMode, aFailureAction);
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}
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static inline nsresult
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ComputeCRC32(nsIFile* aFile, uint32_t* aResult)
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{
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PRFileDesc* fd;
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nsresult rv = aFile->OpenNSPRFileDesc(PR_RDONLY, 0, &fd);
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NS_ENSURE_SUCCESS(rv, rv);
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uint32_t crc = crc32(0, nullptr, 0);
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unsigned char buf[512];
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int32_t n;
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while ((n = PR_Read(fd, buf, sizeof(buf))) > 0) {
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crc = crc32(crc, buf, n);
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}
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PR_Close(fd);
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if (n < 0) {
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return NS_ERROR_FAILURE;
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}
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*aResult = crc;
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return NS_OK;
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}
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static void
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ListInterestingFiles(nsString& aAnnotation, nsIFile* aFile,
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const nsTArray<nsString>& aInterestingFilenames)
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{
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nsString filename;
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aFile->GetLeafName(filename);
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for (const nsString& interestingFilename : aInterestingFilenames) {
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if (interestingFilename == filename) {
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nsString path;
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aFile->GetPath(path);
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aAnnotation.AppendLiteral(" ");
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aAnnotation.Append(path);
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aAnnotation.AppendLiteral(" (");
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int64_t size;
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if (NS_SUCCEEDED(aFile->GetFileSize(&size))) {
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aAnnotation.AppendPrintf("%" PRId64, size);
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} else {
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aAnnotation.AppendLiteral("???");
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}
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aAnnotation.AppendLiteral(" bytes, crc32 = ");
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uint32_t crc;
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nsresult rv = ComputeCRC32(aFile, &crc);
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if (NS_SUCCEEDED(rv)) {
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aAnnotation.AppendPrintf("0x%08x)\n", crc);
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} else {
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aAnnotation.AppendPrintf("error 0x%08x)\n", uint32_t(rv));
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}
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return;
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}
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}
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bool isDir = false;
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aFile->IsDirectory(&isDir);
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if (!isDir) {
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return;
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}
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nsCOMPtr<nsIDirectoryEnumerator> entries;
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if (NS_FAILED(aFile->GetDirectoryEntries(getter_AddRefs(entries)))) {
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aAnnotation.AppendLiteral(" (failed to enumerated directory)\n");
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return;
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}
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for (;;) {
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nsCOMPtr<nsIFile> file;
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if (NS_FAILED(entries->GetNextFile(getter_AddRefs(file)))) {
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aAnnotation.AppendLiteral(" (failed during directory enumeration)\n");
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return;
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}
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if (!file) {
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break;
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}
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ListInterestingFiles(aAnnotation, file, aInterestingFilenames);
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}
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}
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// Generate a crash report annotation to help debug issues with style
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// sheets failing to load (bug 1194856).
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static void
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AnnotateCrashReport(nsIURI* aURI)
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{
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nsAutoCString spec;
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nsAutoCString scheme;
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nsDependentCSubstring filename;
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if (aURI) {
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spec = aURI->GetSpecOrDefault();
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aURI->GetScheme(scheme);
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int32_t i = spec.RFindChar('/');
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if (i != -1) {
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filename.Rebind(spec, i + 1);
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}
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}
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nsString annotation;
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// The URL of the sheet that failed to load.
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annotation.AppendLiteral("Error loading sheet: ");
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annotation.Append(NS_ConvertUTF8toUTF16(spec).get());
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annotation.Append('\n');
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annotation.AppendLiteral("NS_ERROR_FILE_CORRUPTION reason: ");
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if (nsZipArchive::sFileCorruptedReason) {
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annotation.Append(NS_ConvertUTF8toUTF16(nsZipArchive::sFileCorruptedReason).get());
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annotation.Append('\n');
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} else {
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annotation.AppendLiteral("(none)\n");
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}
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// The jar: or file: URL that the sheet's resource: or chrome: URL
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// resolves to.
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if (scheme.EqualsLiteral("resource")) {
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annotation.AppendLiteral("Real location: ");
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nsCOMPtr<nsISubstitutingProtocolHandler> handler;
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nsCOMPtr<nsIIOService> io(do_GetIOService());
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if (io) {
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nsCOMPtr<nsIProtocolHandler> ph;
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io->GetProtocolHandler(scheme.get(), getter_AddRefs(ph));
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if (ph) {
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handler = do_QueryInterface(ph);
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}
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}
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if (!handler) {
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annotation.AppendLiteral("(ResolveURI failed)\n");
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} else {
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nsAutoCString resolvedSpec;
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nsresult rv = handler->ResolveURI(aURI, resolvedSpec);
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if (NS_FAILED(rv)) {
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annotation.AppendPrintf("(ResolveURI failed with 0x%08" PRIx32 ")\n",
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static_cast<uint32_t>(rv));
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}
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annotation.Append(NS_ConvertUTF8toUTF16(resolvedSpec));
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annotation.Append('\n');
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}
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} else if (scheme.EqualsLiteral("chrome")) {
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annotation.AppendLiteral("Real location: ");
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nsCOMPtr<nsIChromeRegistry> reg =
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mozilla::services::GetChromeRegistryService();
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if (!reg) {
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annotation.AppendLiteral("(no chrome registry)\n");
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} else {
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nsCOMPtr<nsIURI> resolvedURI;
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reg->ConvertChromeURL(aURI, getter_AddRefs(resolvedURI));
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if (!resolvedURI) {
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annotation.AppendLiteral("(ConvertChromeURL failed)\n");
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} else {
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annotation.Append(
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NS_ConvertUTF8toUTF16(resolvedURI->GetSpecOrDefault()));
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annotation.Append('\n');
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}
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}
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}
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nsTArray<nsString> interestingFiles;
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interestingFiles.AppendElement(NS_LITERAL_STRING("chrome.manifest"));
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interestingFiles.AppendElement(NS_LITERAL_STRING("omni.ja"));
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interestingFiles.AppendElement(NS_ConvertUTF8toUTF16(filename));
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annotation.AppendLiteral("GRE directory: ");
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nsCOMPtr<nsIFile> file;
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nsDirectoryService::gService->Get(NS_GRE_DIR, NS_GET_IID(nsIFile),
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getter_AddRefs(file));
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if (file) {
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// The Firefox installation directory.
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nsString path;
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file->GetPath(path);
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annotation.Append(path);
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annotation.Append('\n');
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// List interesting files -- any chrome.manifest or omni.ja file or any file
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// whose name is the sheet's filename -- under the Firefox installation
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// directory.
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annotation.AppendLiteral("Interesting files in the GRE directory:\n");
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ListInterestingFiles(annotation, file, interestingFiles);
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// If the Firefox installation directory has a chrome.manifest file, let's
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// see what's in it.
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file->Append(NS_LITERAL_STRING("chrome.manifest"));
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bool exists = false;
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file->Exists(&exists);
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if (exists) {
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annotation.AppendLiteral("Contents of chrome.manifest:\n[[[\n");
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PRFileDesc* fd;
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if (NS_SUCCEEDED(file->OpenNSPRFileDesc(PR_RDONLY, 0, &fd))) {
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nsCString contents;
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char buf[512];
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int32_t n;
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while ((n = PR_Read(fd, buf, sizeof(buf))) > 0) {
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contents.Append(buf, n);
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}
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if (n < 0) {
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annotation.AppendLiteral(" (error while reading)\n");
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} else {
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annotation.Append(NS_ConvertUTF8toUTF16(contents));
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}
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PR_Close(fd);
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}
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annotation.AppendLiteral("]]]\n");
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}
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} else {
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annotation.AppendLiteral("(none)\n");
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}
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// The jar: or file: URL prefix that chrome: and resource: URLs get translated
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// to.
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annotation.AppendLiteral("GRE omnijar URI string: ");
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nsCString uri;
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nsresult rv = Omnijar::GetURIString(Omnijar::GRE, uri);
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if (NS_FAILED(rv)) {
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annotation.AppendLiteral("(failed)\n");
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} else {
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annotation.Append(NS_ConvertUTF8toUTF16(uri));
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annotation.Append('\n');
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}
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RefPtr<nsZipArchive> zip = Omnijar::GetReader(Omnijar::GRE);
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if (zip) {
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// List interesting files in the GRE omnijar.
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annotation.AppendLiteral("Interesting files in the GRE omnijar:\n");
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nsZipFind* find;
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rv = zip->FindInit(nullptr, &find);
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if (NS_FAILED(rv)) {
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annotation.AppendPrintf(" (FindInit failed with 0x%08" PRIx32 ")\n",
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static_cast<uint32_t>(rv));
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} else if (!find) {
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annotation.AppendLiteral(" (FindInit returned null)\n");
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} else {
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const char* result;
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uint16_t len;
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while (NS_SUCCEEDED(find->FindNext(&result, &len))) {
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nsCString itemPathname;
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nsString itemFilename;
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itemPathname.Append(result, len);
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int32_t i = itemPathname.RFindChar('/');
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if (i != -1) {
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itemFilename = NS_ConvertUTF8toUTF16(Substring(itemPathname, i + 1));
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}
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for (const nsString& interestingFile : interestingFiles) {
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if (interestingFile == itemFilename) {
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annotation.AppendLiteral(" ");
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annotation.Append(NS_ConvertUTF8toUTF16(itemPathname));
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nsZipItem* item = zip->GetItem(itemPathname.get());
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if (!item) {
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annotation.AppendLiteral(" (GetItem failed)\n");
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} else {
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annotation.AppendPrintf(" (%d bytes, crc32 = 0x%08x)\n",
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item->RealSize(),
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item->CRC32());
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}
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break;
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}
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}
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}
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delete find;
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}
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} else {
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annotation.AppendLiteral("No GRE omnijar\n");
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}
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CrashReporter::AnnotateCrashReport(
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CrashReporter::Annotation::SheetLoadFailure,
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NS_ConvertUTF16toUTF8(annotation));
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}
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static void
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ErrorLoadingSheet(nsIURI* aURI, const char* aMsg, FailureAction aFailureAction)
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{
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nsPrintfCString errorMessage("%s loading built-in stylesheet '%s'",
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aMsg,
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aURI ? aURI->GetSpecOrDefault().get() : "");
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if (aFailureAction == eLogToConsole) {
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nsCOMPtr<nsIConsoleService> cs = do_GetService(NS_CONSOLESERVICE_CONTRACTID);
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if (cs) {
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cs->LogStringMessage(NS_ConvertUTF8toUTF16(errorMessage).get());
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return;
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}
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}
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AnnotateCrashReport(aURI);
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MOZ_CRASH_UNSAFE_OOL(errorMessage.get());
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}
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void
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nsLayoutStylesheetCache::LoadSheet(nsIURI* aURI,
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RefPtr<StyleSheet>* aSheet,
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SheetParsingMode aParsingMode,
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FailureAction aFailureAction)
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{
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if (!aURI) {
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ErrorLoadingSheet(aURI, "null URI", eCrash);
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return;
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}
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if (!gCSSLoader) {
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gCSSLoader = new Loader;
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if (!gCSSLoader) {
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ErrorLoadingSheet(aURI, "no Loader", eCrash);
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return;
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}
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}
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nsZipArchive::sFileCorruptedReason = nullptr;
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// Note: The parallel parsing code assume that UA sheets are always loaded
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// synchronously like they are here, and thus that we'll never attempt
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// parallel parsing on them. If that ever changes, we'll either need to find a
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// different way to prohibit parallel parsing for UA sheets, or handle
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// -moz-bool-pref and various other things in the parallel parsing code.
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nsresult rv = gCSSLoader->LoadSheetSync(aURI, aParsingMode, true, aSheet);
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if (NS_FAILED(rv)) {
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ErrorLoadingSheet(aURI,
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nsPrintfCString("LoadSheetSync failed with error %" PRIx32, static_cast<uint32_t>(rv)).get(),
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aFailureAction);
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}
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}
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/* static */ void
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nsLayoutStylesheetCache::InvalidatePreferenceSheets()
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{
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if (gStyleCache) {
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gStyleCache->mContentPreferenceSheet = nullptr;
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gStyleCache->mChromePreferenceSheet = nullptr;
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}
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}
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void
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nsLayoutStylesheetCache::BuildPreferenceSheet(RefPtr<StyleSheet>* aSheet,
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nsPresContext* aPresContext)
|
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{
|
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*aSheet = new StyleSheet(eAgentSheetFeatures,
|
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CORS_NONE,
|
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mozilla::net::RP_Unset,
|
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dom::SRIMetadata());
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StyleSheet* sheet = *aSheet;
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nsCOMPtr<nsIURI> uri;
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NS_NewURI(getter_AddRefs(uri), "about:PreferenceStyleSheet", nullptr);
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MOZ_ASSERT(uri, "URI creation shouldn't fail");
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|
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sheet->SetURIs(uri, uri, uri);
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sheet->SetComplete();
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|
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static const uint32_t kPreallocSize = 1024;
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|
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nsCString sheetText;
|
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sheetText.SetCapacity(kPreallocSize);
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|
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#define NS_GET_R_G_B(color_) \
|
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NS_GET_R(color_), NS_GET_G(color_), NS_GET_B(color_)
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|
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sheetText.AppendLiteral(
|
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"@namespace url(http://www.w3.org/1999/xhtml);\n"
|
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"@namespace svg url(http://www.w3.org/2000/svg);\n");
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|
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// Rules for link styling.
|
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nscolor linkColor = aPresContext->DefaultLinkColor();
|
|
nscolor activeColor = aPresContext->DefaultActiveLinkColor();
|
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nscolor visitedColor = aPresContext->DefaultVisitedLinkColor();
|
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|
|
sheetText.AppendPrintf(
|
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"*|*:link { color: #%02x%02x%02x; }\n"
|
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"*|*:any-link:active { color: #%02x%02x%02x; }\n"
|
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"*|*:visited { color: #%02x%02x%02x; }\n",
|
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NS_GET_R_G_B(linkColor),
|
|
NS_GET_R_G_B(activeColor),
|
|
NS_GET_R_G_B(visitedColor));
|
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|
|
bool underlineLinks =
|
|
aPresContext->GetCachedBoolPref(kPresContext_UnderlineLinks);
|
|
sheetText.AppendPrintf(
|
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"*|*:any-link%s { text-decoration: %s; }\n",
|
|
underlineLinks ? ":not(svg|a)" : "",
|
|
underlineLinks ? "underline" : "none");
|
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|
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// Rules for focus styling.
|
|
|
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bool focusRingOnAnything = aPresContext->GetFocusRingOnAnything();
|
|
uint8_t focusRingWidth = aPresContext->FocusRingWidth();
|
|
uint8_t focusRingStyle = aPresContext->GetFocusRingStyle();
|
|
|
|
if ((focusRingWidth != 1 && focusRingWidth <= 4) || focusRingOnAnything) {
|
|
if (focusRingWidth != 1) {
|
|
// If the focus ring width is different from the default, fix buttons
|
|
// with rings.
|
|
sheetText.AppendPrintf(
|
|
"button::-moz-focus-inner, input[type=\"reset\"]::-moz-focus-inner, "
|
|
"input[type=\"button\"]::-moz-focus-inner, "
|
|
"input[type=\"submit\"]::-moz-focus-inner { "
|
|
"border: %dpx %s transparent !important; }\n",
|
|
focusRingWidth,
|
|
focusRingStyle == 0 ? "solid" : "dotted");
|
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|
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sheetText.AppendLiteral(
|
|
"button:focus::-moz-focus-inner, "
|
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"input[type=\"reset\"]:focus::-moz-focus-inner, "
|
|
"input[type=\"button\"]:focus::-moz-focus-inner, "
|
|
"input[type=\"submit\"]:focus::-moz-focus-inner { "
|
|
"border-color: ButtonText !important; }\n");
|
|
}
|
|
|
|
sheetText.AppendPrintf(
|
|
"%s { outline: %dpx %s !important; %s}\n",
|
|
focusRingOnAnything ?
|
|
":focus" :
|
|
"*|*:link:focus, *|*:visited:focus",
|
|
focusRingWidth,
|
|
focusRingStyle == 0 ? // solid
|
|
"solid -moz-mac-focusring" : "dotted WindowText",
|
|
focusRingStyle == 0 ? // solid
|
|
"-moz-outline-radius: 3px; outline-offset: 1px; " : "");
|
|
}
|
|
|
|
if (aPresContext->GetUseFocusColors()) {
|
|
nscolor focusText = aPresContext->FocusTextColor();
|
|
nscolor focusBG = aPresContext->FocusBackgroundColor();
|
|
sheetText.AppendPrintf(
|
|
"*:focus, *:focus > font { color: #%02x%02x%02x !important; "
|
|
"background-color: #%02x%02x%02x !important; }\n",
|
|
NS_GET_R_G_B(focusText),
|
|
NS_GET_R_G_B(focusBG));
|
|
}
|
|
|
|
NS_ASSERTION(sheetText.Length() <= kPreallocSize,
|
|
"kPreallocSize should be big enough to build preference style "
|
|
"sheet without reallocation");
|
|
|
|
// NB: The pref sheet never has @import rules, thus no loader.
|
|
sheet->ParseSheetSync(nullptr,
|
|
sheetText,
|
|
/* aLoadData = */ nullptr,
|
|
/* aLineNumber = */ 0);
|
|
|
|
#undef NS_GET_R_G_B
|
|
}
|
|
|
|
mozilla::StaticRefPtr<nsLayoutStylesheetCache>
|
|
nsLayoutStylesheetCache::gStyleCache;
|
|
|
|
mozilla::StaticRefPtr<mozilla::css::Loader>
|
|
nsLayoutStylesheetCache::gCSSLoader;
|
|
|
|
mozilla::StaticRefPtr<nsIURI>
|
|
nsLayoutStylesheetCache::gUserContentSheetURL;
|