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gecko-dev/layout/style/nsLayoutStylesheetCache.cpp

1025 строки
30 KiB
C++
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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 "nsLayoutStylesheetCache.h"
#include "nsAppDirectoryServiceDefs.h"
#include "mozilla/StyleSheetInlines.h"
#include "mozilla/MemoryReporting.h"
#include "mozilla/Preferences.h"
#include "mozilla/StyleSheet.h"
#include "mozilla/StyleSheetInlines.h"
#include "mozilla/css/Loader.h"
#include "mozilla/dom/SRIMetadata.h"
#include "MainThreadUtils.h"
#include "nsColor.h"
#include "nsIConsoleService.h"
#include "nsIFile.h"
#include "nsNetUtil.h"
#include "nsIObserverService.h"
#include "nsServiceManagerUtils.h"
#include "nsIXULRuntime.h"
#include "nsPresContext.h"
#include "nsPrintfCString.h"
#include "nsXULAppAPI.h"
// Includes for the crash report annotation in ErrorLoadingSheet.
#ifdef MOZ_CRASHREPORTER
#include "mozilla/Omnijar.h"
#include "nsDirectoryService.h"
#include "nsDirectoryServiceDefs.h"
#include "nsExceptionHandler.h"
#include "nsIChromeRegistry.h"
#include "nsISimpleEnumerator.h"
#include "nsISubstitutingProtocolHandler.h"
#include "zlib.h"
#include "nsZipArchive.h"
#endif
using namespace mozilla;
using namespace mozilla::css;
static bool sNumberControlEnabled;
#define NUMBER_CONTROL_PREF "dom.forms.number"
NS_IMPL_ISUPPORTS(
nsLayoutStylesheetCache, nsIObserver, nsIMemoryReporter)
nsresult
nsLayoutStylesheetCache::Observe(nsISupports* aSubject,
const char* aTopic,
const char16_t* aData)
{
if (!strcmp(aTopic, "profile-before-change")) {
mUserContentSheet = nullptr;
mUserChromeSheet = nullptr;
}
else if (!strcmp(aTopic, "profile-do-change")) {
InitFromProfile();
}
else if (strcmp(aTopic, "chrome-flush-skin-caches") == 0 ||
strcmp(aTopic, "chrome-flush-caches") == 0) {
mScrollbarsSheet = nullptr;
mFormsSheet = nullptr;
mNumberControlSheet = nullptr;
}
else {
NS_NOTREACHED("Unexpected observer topic.");
}
return NS_OK;
}
StyleSheet*
nsLayoutStylesheetCache::ScrollbarsSheet()
{
if (!mScrollbarsSheet) {
// Scrollbars don't need access to unsafe rules
LoadSheetURL("chrome://global/skin/scrollbars.css",
&mScrollbarsSheet, eSafeAgentSheetFeatures, eCrash);
}
return mScrollbarsSheet;
}
StyleSheet*
nsLayoutStylesheetCache::FormsSheet()
{
if (!mFormsSheet) {
// forms.css needs access to unsafe rules
LoadSheetURL("resource://gre-resources/forms.css",
&mFormsSheet, eAgentSheetFeatures, eCrash);
}
return mFormsSheet;
}
StyleSheet*
nsLayoutStylesheetCache::NumberControlSheet()
{
if (!sNumberControlEnabled) {
return nullptr;
}
if (!mNumberControlSheet) {
LoadSheetURL("resource://gre-resources/number-control.css",
&mNumberControlSheet, eAgentSheetFeatures, eCrash);
}
return mNumberControlSheet;
}
StyleSheet*
nsLayoutStylesheetCache::UserContentSheet()
{
return mUserContentSheet;
}
StyleSheet*
nsLayoutStylesheetCache::UserChromeSheet()
{
return mUserChromeSheet;
}
StyleSheet*
nsLayoutStylesheetCache::UASheet()
{
if (!mUASheet) {
LoadSheetURL("resource://gre-resources/ua.css",
&mUASheet, eAgentSheetFeatures, eCrash);
}
return mUASheet;
}
StyleSheet*
nsLayoutStylesheetCache::HTMLSheet()
{
return mHTMLSheet;
}
StyleSheet*
nsLayoutStylesheetCache::MinimalXULSheet()
{
return mMinimalXULSheet;
}
StyleSheet*
nsLayoutStylesheetCache::XULSheet()
{
if (!mXULSheet) {
LoadSheetURL("chrome://global/content/xul.css",
&mXULSheet, eAgentSheetFeatures, eCrash);
}
return mXULSheet;
}
StyleSheet*
nsLayoutStylesheetCache::QuirkSheet()
{
return mQuirkSheet;
}
StyleSheet*
nsLayoutStylesheetCache::SVGSheet()
{
return mSVGSheet;
}
StyleSheet*
nsLayoutStylesheetCache::MathMLSheet()
{
if (!mMathMLSheet) {
LoadSheetURL("resource://gre-resources/mathml.css",
&mMathMLSheet, eAgentSheetFeatures, eCrash);
}
return mMathMLSheet;
}
StyleSheet*
nsLayoutStylesheetCache::CounterStylesSheet()
{
return mCounterStylesSheet;
}
StyleSheet*
nsLayoutStylesheetCache::NoScriptSheet()
{
if (!mNoScriptSheet) {
LoadSheetURL("resource://gre-resources/noscript.css",
&mNoScriptSheet, eAgentSheetFeatures, eCrash);
}
return mNoScriptSheet;
}
StyleSheet*
nsLayoutStylesheetCache::NoFramesSheet()
{
if (!mNoFramesSheet) {
LoadSheetURL("resource://gre-resources/noframes.css",
&mNoFramesSheet, eAgentSheetFeatures, eCrash);
}
return mNoFramesSheet;
}
StyleSheet*
nsLayoutStylesheetCache::ChromePreferenceSheet(nsPresContext* aPresContext)
{
if (!mChromePreferenceSheet) {
BuildPreferenceSheet(&mChromePreferenceSheet, aPresContext);
}
return mChromePreferenceSheet;
}
StyleSheet*
nsLayoutStylesheetCache::ContentPreferenceSheet(nsPresContext* aPresContext)
{
if (!mContentPreferenceSheet) {
BuildPreferenceSheet(&mContentPreferenceSheet, aPresContext);
}
return mContentPreferenceSheet;
}
StyleSheet*
nsLayoutStylesheetCache::ContentEditableSheet()
{
if (!mContentEditableSheet) {
LoadSheetURL("resource://gre/res/contenteditable.css",
&mContentEditableSheet, eAgentSheetFeatures, eCrash);
}
return mContentEditableSheet;
}
StyleSheet*
nsLayoutStylesheetCache::DesignModeSheet()
{
if (!mDesignModeSheet) {
LoadSheetURL("resource://gre/res/designmode.css",
&mDesignModeSheet, eAgentSheetFeatures, eCrash);
}
return mDesignModeSheet;
}
void
nsLayoutStylesheetCache::Shutdown()
{
gCSSLoader_Gecko = nullptr;
gCSSLoader_Servo = nullptr;
NS_WARNING_ASSERTION(!gStyleCache_Gecko || !gUserContentSheetURL_Gecko,
"Got the URL but never used by Gecko?");
NS_WARNING_ASSERTION(!gStyleCache_Servo || !gUserContentSheetURL_Servo,
"Got the URL but never used by Servo?");
gStyleCache_Gecko = nullptr;
gStyleCache_Servo = nullptr;
gUserContentSheetURL_Gecko = nullptr;
gUserContentSheetURL_Servo = nullptr;
}
void
nsLayoutStylesheetCache::SetUserContentCSSURL(nsIURI* aURI)
{
MOZ_ASSERT(XRE_IsContentProcess(), "Only used in content processes.");
gUserContentSheetURL_Gecko = aURI;
gUserContentSheetURL_Servo = aURI;
}
MOZ_DEFINE_MALLOC_SIZE_OF(LayoutStylesheetCacheMallocSizeOf)
NS_IMETHODIMP
nsLayoutStylesheetCache::CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize)
{
MOZ_COLLECT_REPORT(
"explicit/layout/style-sheet-cache", KIND_HEAP, UNITS_BYTES,
SizeOfIncludingThis(LayoutStylesheetCacheMallocSizeOf),
"Memory used for some built-in style sheets.");
return NS_OK;
}
size_t
nsLayoutStylesheetCache::SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
{
size_t n = aMallocSizeOf(this);
#define MEASURE(s) n += s ? s->SizeOfIncludingThis(aMallocSizeOf) : 0;
MEASURE(mChromePreferenceSheet);
MEASURE(mContentEditableSheet);
MEASURE(mContentPreferenceSheet);
MEASURE(mCounterStylesSheet);
MEASURE(mDesignModeSheet);
MEASURE(mFormsSheet);
MEASURE(mHTMLSheet);
MEASURE(mMathMLSheet);
MEASURE(mMinimalXULSheet);
MEASURE(mNoFramesSheet);
MEASURE(mNoScriptSheet);
MEASURE(mNumberControlSheet);
MEASURE(mQuirkSheet);
MEASURE(mSVGSheet);
MEASURE(mScrollbarsSheet);
MEASURE(mUASheet);
MEASURE(mUserChromeSheet);
MEASURE(mUserContentSheet);
MEASURE(mXULSheet);
// Measurement of the following members may be added later if DMD finds it is
// worthwhile:
// - gCSSLoader_Gecko
// - gCSSLoader_Servo
return n;
}
nsLayoutStylesheetCache::nsLayoutStylesheetCache(StyleBackendType aType)
: mBackendType(aType)
{
nsCOMPtr<nsIObserverService> obsSvc =
mozilla::services::GetObserverService();
NS_ASSERTION(obsSvc, "No global observer service?");
if (obsSvc) {
obsSvc->AddObserver(this, "profile-before-change", false);
obsSvc->AddObserver(this, "profile-do-change", false);
obsSvc->AddObserver(this, "chrome-flush-skin-caches", false);
obsSvc->AddObserver(this, "chrome-flush-caches", false);
}
InitFromProfile();
// And make sure that we load our UA sheets. No need to do this
// per-profile, since they're profile-invariant.
LoadSheetURL("resource://gre-resources/counterstyles.css",
&mCounterStylesSheet, eAgentSheetFeatures, eCrash);
LoadSheetURL("resource://gre-resources/html.css",
&mHTMLSheet, eAgentSheetFeatures, eCrash);
LoadSheetURL("chrome://global/content/minimal-xul.css",
&mMinimalXULSheet, eAgentSheetFeatures, eCrash);
LoadSheetURL("resource://gre-resources/quirk.css",
&mQuirkSheet, eAgentSheetFeatures, eCrash);
LoadSheetURL("resource://gre/res/svg.css",
&mSVGSheet, eAgentSheetFeatures, eCrash);
if (XRE_IsParentProcess()) {
// We know we need xul.css for the UI, so load that now too:
XULSheet();
}
auto& userContentSheetURL = aType == StyleBackendType::Gecko ?
gUserContentSheetURL_Gecko :
gUserContentSheetURL_Servo;
if (userContentSheetURL) {
MOZ_ASSERT(XRE_IsContentProcess(), "Only used in content processes.");
LoadSheet(userContentSheetURL, &mUserContentSheet, eUserSheetFeatures, eLogToConsole);
userContentSheetURL = nullptr;
}
// The remaining sheets are created on-demand do to their use being rarer
// (which helps save memory for Firefox OS apps) or because they need to
// be re-loadable in DependentPrefChanged.
}
nsLayoutStylesheetCache::~nsLayoutStylesheetCache()
{
mozilla::UnregisterWeakMemoryReporter(this);
}
void
nsLayoutStylesheetCache::InitMemoryReporter()
{
mozilla::RegisterWeakMemoryReporter(this);
}
/* static */ nsLayoutStylesheetCache*
nsLayoutStylesheetCache::For(StyleBackendType aType)
{
MOZ_ASSERT(NS_IsMainThread());
bool mustInit = !gStyleCache_Gecko && !gStyleCache_Servo;
auto& cache = aType == StyleBackendType::Gecko ? gStyleCache_Gecko :
gStyleCache_Servo;
if (!cache) {
cache = new nsLayoutStylesheetCache(aType);
cache->InitMemoryReporter();
}
if (mustInit) {
// Initialization that only needs to be done once for both
// nsLayoutStylesheetCaches.
Preferences::AddBoolVarCache(&sNumberControlEnabled, NUMBER_CONTROL_PREF,
true);
// For each pref that controls a CSS feature that a UA style sheet depends
// on (such as a pref that enables a property that a UA style sheet uses),
// register DependentPrefChanged as a callback to ensure that the relevant
// style sheets will be re-parsed.
// Preferences::RegisterCallback(&DependentPrefChanged,
// "layout.css.example-pref.enabled");
Preferences::RegisterCallback(&DependentPrefChanged,
"layout.css.grid.enabled");
}
return cache;
}
void
nsLayoutStylesheetCache::InitFromProfile()
{
nsCOMPtr<nsIXULRuntime> appInfo = do_GetService("@mozilla.org/xre/app-info;1");
if (appInfo) {
bool inSafeMode = false;
appInfo->GetInSafeMode(&inSafeMode);
if (inSafeMode)
return;
}
nsCOMPtr<nsIFile> contentFile;
nsCOMPtr<nsIFile> chromeFile;
NS_GetSpecialDirectory(NS_APP_USER_CHROME_DIR,
getter_AddRefs(contentFile));
if (!contentFile) {
// if we don't have a profile yet, that's OK!
return;
}
contentFile->Clone(getter_AddRefs(chromeFile));
if (!chromeFile) return;
contentFile->Append(NS_LITERAL_STRING("userContent.css"));
chromeFile->Append(NS_LITERAL_STRING("userChrome.css"));
LoadSheetFile(contentFile, &mUserContentSheet, eUserSheetFeatures, eLogToConsole);
LoadSheetFile(chromeFile, &mUserChromeSheet, eUserSheetFeatures, eLogToConsole);
}
void
nsLayoutStylesheetCache::LoadSheetURL(const char* aURL,
RefPtr<StyleSheet>* aSheet,
SheetParsingMode aParsingMode,
FailureAction aFailureAction)
{
nsCOMPtr<nsIURI> uri;
NS_NewURI(getter_AddRefs(uri), aURL);
LoadSheet(uri, aSheet, aParsingMode, aFailureAction);
if (!aSheet) {
NS_ERROR(nsPrintfCString("Could not load %s", aURL).get());
}
}
void
nsLayoutStylesheetCache::LoadSheetFile(nsIFile* aFile,
RefPtr<StyleSheet>* aSheet,
SheetParsingMode aParsingMode,
FailureAction aFailureAction)
{
bool exists = false;
aFile->Exists(&exists);
if (!exists) return;
nsCOMPtr<nsIURI> uri;
NS_NewFileURI(getter_AddRefs(uri), aFile);
LoadSheet(uri, aSheet, aParsingMode, aFailureAction);
}
#ifdef MOZ_CRASHREPORTER
static inline nsresult
ComputeCRC32(nsIFile* aFile, uint32_t* aResult)
{
PRFileDesc* fd;
nsresult rv = aFile->OpenNSPRFileDesc(PR_RDONLY, 0, &fd);
NS_ENSURE_SUCCESS(rv, rv);
uint32_t crc = crc32(0, nullptr, 0);
unsigned char buf[512];
int32_t n;
while ((n = PR_Read(fd, buf, sizeof(buf))) > 0) {
crc = crc32(crc, buf, n);
}
PR_Close(fd);
if (n < 0) {
return NS_ERROR_FAILURE;
}
*aResult = crc;
return NS_OK;
}
static void
ListInterestingFiles(nsString& aAnnotation, nsIFile* aFile,
const nsTArray<nsString>& aInterestingFilenames)
{
nsString filename;
aFile->GetLeafName(filename);
for (const nsString& interestingFilename : aInterestingFilenames) {
if (interestingFilename == filename) {
nsString path;
aFile->GetPath(path);
aAnnotation.AppendLiteral(" ");
aAnnotation.Append(path);
aAnnotation.AppendLiteral(" (");
int64_t size;
if (NS_SUCCEEDED(aFile->GetFileSize(&size))) {
aAnnotation.AppendPrintf("%" PRId64, size);
} else {
aAnnotation.AppendLiteral("???");
}
aAnnotation.AppendLiteral(" bytes, crc32 = ");
uint32_t crc;
nsresult rv = ComputeCRC32(aFile, &crc);
if (NS_SUCCEEDED(rv)) {
aAnnotation.AppendPrintf("0x%08x)\n", crc);
} else {
aAnnotation.AppendPrintf("error 0x%08x)\n", uint32_t(rv));
}
return;
}
}
bool isDir = false;
aFile->IsDirectory(&isDir);
if (!isDir) {
return;
}
nsCOMPtr<nsISimpleEnumerator> entries;
if (NS_FAILED(aFile->GetDirectoryEntries(getter_AddRefs(entries)))) {
aAnnotation.AppendLiteral(" (failed to enumerated directory)\n");
return;
}
for (;;) {
bool hasMore = false;
if (NS_FAILED(entries->HasMoreElements(&hasMore))) {
aAnnotation.AppendLiteral(" (failed during directory enumeration)\n");
return;
}
if (!hasMore) {
break;
}
nsCOMPtr<nsISupports> entry;
if (NS_FAILED(entries->GetNext(getter_AddRefs(entry)))) {
aAnnotation.AppendLiteral(" (failed during directory enumeration)\n");
return;
}
nsCOMPtr<nsIFile> file = do_QueryInterface(entry);
if (file) {
ListInterestingFiles(aAnnotation, file, aInterestingFilenames);
}
}
}
// Generate a crash report annotation to help debug issues with style
// sheets failing to load (bug 1194856).
static void
AnnotateCrashReport(nsIURI* aURI)
{
nsAutoCString spec;
nsAutoCString scheme;
nsDependentCSubstring filename;
if (aURI) {
spec = aURI->GetSpecOrDefault();
aURI->GetScheme(scheme);
int32_t i = spec.RFindChar('/');
if (i != -1) {
filename.Rebind(spec, i + 1);
}
}
nsString annotation;
// The URL of the sheet that failed to load.
annotation.AppendLiteral("Error loading sheet: ");
annotation.Append(NS_ConvertUTF8toUTF16(spec).get());
annotation.Append('\n');
annotation.AppendLiteral("NS_ERROR_FILE_CORRUPTION reason: ");
if (nsZipArchive::sFileCorruptedReason) {
annotation.Append(NS_ConvertUTF8toUTF16(nsZipArchive::sFileCorruptedReason).get());
annotation.Append('\n');
} else {
annotation.AppendLiteral("(none)\n");
}
// The jar: or file: URL that the sheet's resource: or chrome: URL
// resolves to.
if (scheme.EqualsLiteral("resource")) {
annotation.AppendLiteral("Real location: ");
nsCOMPtr<nsISubstitutingProtocolHandler> handler;
nsCOMPtr<nsIIOService> io(do_GetIOService());
if (io) {
nsCOMPtr<nsIProtocolHandler> ph;
io->GetProtocolHandler(scheme.get(), getter_AddRefs(ph));
if (ph) {
handler = do_QueryInterface(ph);
}
}
if (!handler) {
annotation.AppendLiteral("(ResolveURI failed)\n");
} else {
nsAutoCString resolvedSpec;
nsresult rv = handler->ResolveURI(aURI, resolvedSpec);
if (NS_FAILED(rv)) {
annotation.AppendPrintf("(ResolveURI failed with 0x%08" PRIx32 ")\n",
static_cast<uint32_t>(rv));
}
annotation.Append(NS_ConvertUTF8toUTF16(resolvedSpec));
annotation.Append('\n');
}
} else if (scheme.EqualsLiteral("chrome")) {
annotation.AppendLiteral("Real location: ");
nsCOMPtr<nsIChromeRegistry> reg =
mozilla::services::GetChromeRegistryService();
if (!reg) {
annotation.AppendLiteral("(no chrome registry)\n");
} else {
nsCOMPtr<nsIURI> resolvedURI;
reg->ConvertChromeURL(aURI, getter_AddRefs(resolvedURI));
if (!resolvedURI) {
annotation.AppendLiteral("(ConvertChromeURL failed)\n");
} else {
annotation.Append(
NS_ConvertUTF8toUTF16(resolvedURI->GetSpecOrDefault()));
annotation.Append('\n');
}
}
}
nsTArray<nsString> interestingFiles;
interestingFiles.AppendElement(NS_LITERAL_STRING("chrome.manifest"));
interestingFiles.AppendElement(NS_LITERAL_STRING("omni.ja"));
interestingFiles.AppendElement(NS_ConvertUTF8toUTF16(filename));
annotation.AppendLiteral("GRE directory: ");
nsCOMPtr<nsIFile> file;
nsDirectoryService::gService->Get(NS_GRE_DIR, NS_GET_IID(nsIFile),
getter_AddRefs(file));
if (file) {
// The Firefox installation directory.
nsString path;
file->GetPath(path);
annotation.Append(path);
annotation.Append('\n');
// List interesting files -- any chrome.manifest or omni.ja file or any file
// whose name is the sheet's filename -- under the Firefox installation
// directory.
annotation.AppendLiteral("Interesting files in the GRE directory:\n");
ListInterestingFiles(annotation, file, interestingFiles);
// If the Firefox installation directory has a chrome.manifest file, let's
// see what's in it.
file->Append(NS_LITERAL_STRING("chrome.manifest"));
bool exists = false;
file->Exists(&exists);
if (exists) {
annotation.AppendLiteral("Contents of chrome.manifest:\n[[[\n");
PRFileDesc* fd;
if (NS_SUCCEEDED(file->OpenNSPRFileDesc(PR_RDONLY, 0, &fd))) {
nsCString contents;
char buf[512];
int32_t n;
while ((n = PR_Read(fd, buf, sizeof(buf))) > 0) {
contents.Append(buf, n);
}
if (n < 0) {
annotation.AppendLiteral(" (error while reading)\n");
} else {
annotation.Append(NS_ConvertUTF8toUTF16(contents));
}
PR_Close(fd);
}
annotation.AppendLiteral("]]]\n");
}
} else {
annotation.AppendLiteral("(none)\n");
}
// The jar: or file: URL prefix that chrome: and resource: URLs get translated
// to.
annotation.AppendLiteral("GRE omnijar URI string: ");
nsCString uri;
nsresult rv = Omnijar::GetURIString(Omnijar::GRE, uri);
if (NS_FAILED(rv)) {
annotation.AppendLiteral("(failed)\n");
} else {
annotation.Append(NS_ConvertUTF8toUTF16(uri));
annotation.Append('\n');
}
RefPtr<nsZipArchive> zip = Omnijar::GetReader(Omnijar::GRE);
if (zip) {
// List interesting files in the GRE omnijar.
annotation.AppendLiteral("Interesting files in the GRE omnijar:\n");
nsZipFind* find;
rv = zip->FindInit(nullptr, &find);
if (NS_FAILED(rv)) {
annotation.AppendPrintf(" (FindInit failed with 0x%08" PRIx32 ")\n",
static_cast<uint32_t>(rv));
} else if (!find) {
annotation.AppendLiteral(" (FindInit returned null)\n");
} else {
const char* result;
uint16_t len;
while (NS_SUCCEEDED(find->FindNext(&result, &len))) {
nsCString itemPathname;
nsString itemFilename;
itemPathname.Append(result, len);
int32_t i = itemPathname.RFindChar('/');
if (i != -1) {
itemFilename = NS_ConvertUTF8toUTF16(Substring(itemPathname, i + 1));
}
for (const nsString& interestingFile : interestingFiles) {
if (interestingFile == itemFilename) {
annotation.AppendLiteral(" ");
annotation.Append(NS_ConvertUTF8toUTF16(itemPathname));
nsZipItem* item = zip->GetItem(itemPathname.get());
if (!item) {
annotation.AppendLiteral(" (GetItem failed)\n");
} else {
annotation.AppendPrintf(" (%d bytes, crc32 = 0x%08x)\n",
item->RealSize(),
item->CRC32());
}
break;
}
}
}
delete find;
}
} else {
annotation.AppendLiteral("No GRE omnijar\n");
}
CrashReporter::AnnotateCrashReport(NS_LITERAL_CSTRING("SheetLoadFailure"),
NS_ConvertUTF16toUTF8(annotation));
}
#endif
static void
ErrorLoadingSheet(nsIURI* aURI, const char* aMsg, FailureAction aFailureAction)
{
nsPrintfCString errorMessage("%s loading built-in stylesheet '%s'",
aMsg,
aURI ? aURI->GetSpecOrDefault().get() : "");
if (aFailureAction == eLogToConsole) {
nsCOMPtr<nsIConsoleService> cs = do_GetService(NS_CONSOLESERVICE_CONTRACTID);
if (cs) {
cs->LogStringMessage(NS_ConvertUTF8toUTF16(errorMessage).get());
return;
}
}
#ifdef MOZ_CRASHREPORTER
AnnotateCrashReport(aURI);
#endif
NS_RUNTIMEABORT(errorMessage.get());
}
void
nsLayoutStylesheetCache::LoadSheet(nsIURI* aURI,
RefPtr<StyleSheet>* aSheet,
SheetParsingMode aParsingMode,
FailureAction aFailureAction)
{
if (!aURI) {
ErrorLoadingSheet(aURI, "null URI", eCrash);
return;
}
auto& loader = mBackendType == StyleBackendType::Gecko ?
gCSSLoader_Gecko :
gCSSLoader_Servo;
if (!loader) {
loader = new Loader(mBackendType, nullptr);
if (!loader) {
ErrorLoadingSheet(aURI, "no Loader", eCrash);
return;
}
}
#ifdef MOZ_CRASHREPORTER
nsZipArchive::sFileCorruptedReason = nullptr;
#endif
nsresult rv = loader->LoadSheetSync(aURI, aParsingMode, true, aSheet);
if (NS_FAILED(rv)) {
ErrorLoadingSheet(aURI,
nsPrintfCString("LoadSheetSync failed with error %" PRIx32, static_cast<uint32_t>(rv)).get(),
aFailureAction);
}
}
/* static */ void
nsLayoutStylesheetCache::InvalidateSheet(RefPtr<StyleSheet>* aGeckoSheet,
RefPtr<StyleSheet>* aServoSheet)
{
MOZ_ASSERT(gCSSLoader_Gecko || gCSSLoader_Servo,
"pref changed before we loaded a sheet?");
const bool gotGeckoSheet = aGeckoSheet && *aGeckoSheet;
const bool gotServoSheet = aServoSheet && *aServoSheet;
// Make sure sheets have the expected types
MOZ_ASSERT(!gotGeckoSheet || (*aGeckoSheet)->IsGecko());
MOZ_ASSERT(!gotServoSheet || (*aServoSheet)->IsServo());
// Make sure the URIs match
MOZ_ASSERT(!gotServoSheet || !gotGeckoSheet ||
(*aGeckoSheet)->GetSheetURI() == (*aServoSheet)->GetSheetURI(),
"Sheets passed should have the same URI");
nsIURI* uri;
if (gotGeckoSheet) {
uri = (*aGeckoSheet)->GetSheetURI();
} else if (gotServoSheet) {
uri = (*aServoSheet)->GetSheetURI();
} else {
return;
}
if (gCSSLoader_Gecko) {
gCSSLoader_Gecko->ObsoleteSheet(uri);
}
if (gCSSLoader_Servo) {
gCSSLoader_Servo->ObsoleteSheet(uri);
}
if (gotGeckoSheet) {
*aGeckoSheet = nullptr;
}
if (gotServoSheet) {
*aServoSheet = nullptr;
}
}
/* static */ void
nsLayoutStylesheetCache::DependentPrefChanged(const char* aPref, void* aData)
{
MOZ_ASSERT(gStyleCache_Gecko || gStyleCache_Servo,
"pref changed after shutdown?");
// Cause any UA style sheets whose parsing depends on the value of prefs
// to be re-parsed by dropping the sheet from gCSSLoader_{Gecko,Servo}'s cache
// then setting our cached sheet pointer to null. This will only work for
// sheets that are loaded lazily.
#define INVALIDATE(sheet_) \
InvalidateSheet(gStyleCache_Gecko ? &gStyleCache_Gecko->sheet_ : nullptr, \
gStyleCache_Servo ? &gStyleCache_Servo->sheet_ : nullptr);
INVALIDATE(mUASheet); // for layout.css.grid.enabled
#undef INVALIDATE
}
/* static */ void
nsLayoutStylesheetCache::InvalidatePreferenceSheets()
{
if (gStyleCache_Gecko) {
gStyleCache_Gecko->mContentPreferenceSheet = nullptr;
gStyleCache_Gecko->mChromePreferenceSheet = nullptr;
}
if (gStyleCache_Servo) {
gStyleCache_Servo->mContentPreferenceSheet = nullptr;
gStyleCache_Servo->mChromePreferenceSheet = nullptr;
}
}
void
nsLayoutStylesheetCache::BuildPreferenceSheet(RefPtr<StyleSheet>* aSheet,
nsPresContext* aPresContext)
{
if (mBackendType == StyleBackendType::Gecko) {
*aSheet = new CSSStyleSheet(eAgentSheetFeatures, CORS_NONE,
mozilla::net::RP_Unset);
} else {
*aSheet = new ServoStyleSheet(eAgentSheetFeatures, CORS_NONE,
mozilla::net::RP_Unset, dom::SRIMetadata());
}
StyleSheet* sheet = *aSheet;
nsCOMPtr<nsIURI> uri;
NS_NewURI(getter_AddRefs(uri), "about:PreferenceStyleSheet", nullptr);
MOZ_ASSERT(uri, "URI creation shouldn't fail");
sheet->SetURIs(uri, uri, uri);
sheet->SetComplete();
static const uint32_t kPreallocSize = 1024;
nsString sheetText;
sheetText.SetCapacity(kPreallocSize);
#define NS_GET_R_G_B(color_) \
NS_GET_R(color_), NS_GET_G(color_), NS_GET_B(color_)
sheetText.AppendLiteral(
"@namespace url(http://www.w3.org/1999/xhtml);\n"
"@namespace svg url(http://www.w3.org/2000/svg);\n");
// Rules for link styling.
nscolor linkColor = aPresContext->DefaultLinkColor();
nscolor activeColor = aPresContext->DefaultActiveLinkColor();
nscolor visitedColor = aPresContext->DefaultVisitedLinkColor();
sheetText.AppendPrintf(
"*|*:link { color: #%02x%02x%02x; }\n"
"*|*:any-link:active { color: #%02x%02x%02x; }\n"
"*|*:visited { color: #%02x%02x%02x; }\n",
NS_GET_R_G_B(linkColor),
NS_GET_R_G_B(activeColor),
NS_GET_R_G_B(visitedColor));
bool underlineLinks =
aPresContext->GetCachedBoolPref(kPresContext_UnderlineLinks);
sheetText.AppendPrintf(
"*|*:any-link%s { text-decoration: %s; }\n",
underlineLinks ? ":not(svg|a)" : "",
underlineLinks ? "underline" : "none");
// Rules for focus styling.
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");
sheetText.AppendLiteral(
"button:focus::-moz-focus-inner, "
"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");
if (sheet->IsGecko()) {
sheet->AsGecko()->ReparseSheet(sheetText);
} else {
ServoStyleSheet* servoSheet = sheet->AsServo();
// NB: The pref sheet never has @import rules.
nsresult rv =
servoSheet->ParseSheet(nullptr, sheetText, uri, uri, nullptr, 0,
eCompatibility_FullStandards);
// Parsing the about:PreferenceStyleSheet URI can only fail on OOM. If we
// are OOM before we parsed any documents we might as well abort.
MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
}
#undef NS_GET_R_G_B
}
mozilla::StaticRefPtr<nsLayoutStylesheetCache>
nsLayoutStylesheetCache::gStyleCache_Gecko;
mozilla::StaticRefPtr<nsLayoutStylesheetCache>
nsLayoutStylesheetCache::gStyleCache_Servo;
mozilla::StaticRefPtr<mozilla::css::Loader>
nsLayoutStylesheetCache::gCSSLoader_Gecko;
mozilla::StaticRefPtr<mozilla::css::Loader>
nsLayoutStylesheetCache::gCSSLoader_Servo;
mozilla::StaticRefPtr<nsIURI>
nsLayoutStylesheetCache::gUserContentSheetURL_Gecko;
mozilla::StaticRefPtr<nsIURI>
nsLayoutStylesheetCache::gUserContentSheetURL_Servo;
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