Add m-esr52 at 52.6.0

1 files changed, 382 insertions, 0 deletions

diff --git a/layout/style/ErrorReporter.cpp b/layout/style/ErrorReporter.cpp
new file mode 100644
index 000000000..56a84da3e
--- /dev/null
+++ b/layout/style/ErrorReporter.cpp
@@ -0,0 +1,382 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/. */
+
+/* diagnostic reporting for CSS style sheet parser */
+
+#include "mozilla/css/ErrorReporter.h"
+
+#include "mozilla/StyleSheetInlines.h"
+#include "mozilla/css/Loader.h"
+#include "mozilla/Preferences.h"
+#include "mozilla/Services.h"
+#include "nsCSSScanner.h"
+#include "nsIConsoleService.h"
+#include "nsIDocument.h"
+#include "nsIFactory.h"
+#include "nsIScriptError.h"
+#include "nsIStringBundle.h"
+#include "nsServiceManagerUtils.h"
+#include "nsStyleUtil.h"
+#include "nsThreadUtils.h"
+
+#ifdef CSS_REPORT_PARSE_ERRORS
+
+using namespace mozilla;
+
+namespace {
+class ShortTermURISpecCache : public Runnable {
+public:
+  ShortTermURISpecCache() : mPending(false) {}
+
+  nsString const& GetSpec(nsIURI* aURI) {
+    if (mURI != aURI) {
+      mURI = aURI;
+
+      nsAutoCString cSpec;
+      nsresult rv = mURI->GetSpec(cSpec);
+      if (NS_FAILED(rv)) {
+        cSpec.AssignLiteral("[nsIURI::GetSpec failed]");
+      }
+      CopyUTF8toUTF16(cSpec, mSpec);
+    }
+    return mSpec;
+  }
+
+  bool IsInUse() const { return mURI != nullptr; }
+  bool IsPending() const { return mPending; }
+  void SetPending() { mPending = true; }
+
+  // When invoked as a runnable, zap the cache.
+  NS_IMETHOD Run() override {
+    mURI = nullptr;
+    mSpec.Truncate();
+    mPending = false;
+    return NS_OK;
+  }
+
+private:
+  nsCOMPtr<nsIURI> mURI;
+  nsString mSpec;
+  bool mPending;
+};
+
+} // namespace
+
+static bool sReportErrors;
+static nsIConsoleService *sConsoleService;
+static nsIFactory *sScriptErrorFactory;
+static nsIStringBundle *sStringBundle;
+static ShortTermURISpecCache *sSpecCache;
+
+#define CSS_ERRORS_PREF "layout.css.report_errors"
+
+static bool
+InitGlobals()
+{
+  MOZ_ASSERT(!sConsoleService && !sScriptErrorFactory && !sStringBundle,
+             "should not have been called");
+
+  if (NS_FAILED(Preferences::AddBoolVarCache(&sReportErrors, CSS_ERRORS_PREF,
+                                             true))) {
+    return false;
+  }
+
+  nsCOMPtr<nsIConsoleService> cs = do_GetService(NS_CONSOLESERVICE_CONTRACTID);
+  if (!cs) {
+    return false;
+  }
+
+  nsCOMPtr<nsIFactory> sf = do_GetClassObject(NS_SCRIPTERROR_CONTRACTID);
+  if (!sf) {
+    return false;
+  }
+
+  nsCOMPtr<nsIStringBundleService> sbs = services::GetStringBundleService();
+  if (!sbs) {
+    return false;
+  }
+
+  nsCOMPtr<nsIStringBundle> sb;
+  nsresult rv = sbs->CreateBundle("chrome://global/locale/css.properties",
+                                  getter_AddRefs(sb));
+  if (NS_FAILED(rv) || !sb) {
+    return false;
+  }
+
+  cs.forget(&sConsoleService);
+  sf.forget(&sScriptErrorFactory);
+  sb.forget(&sStringBundle);
+
+  return true;
+}
+
+static inline bool
+ShouldReportErrors()
+{
+  if (!sConsoleService) {
+    if (!InitGlobals()) {
+      return false;
+    }
+  }
+  return sReportErrors;
+}
+
+namespace mozilla {
+namespace css {
+
+/* static */ void
+ErrorReporter::ReleaseGlobals()
+{
+  NS_IF_RELEASE(sConsoleService);
+  NS_IF_RELEASE(sScriptErrorFactory);
+  NS_IF_RELEASE(sStringBundle);
+  NS_IF_RELEASE(sSpecCache);
+}
+
+ErrorReporter::ErrorReporter(const nsCSSScanner& aScanner,
+                             const CSSStyleSheet* aSheet,
+                             const Loader* aLoader,
+                             nsIURI* aURI)
+  : mScanner(&aScanner), mSheet(aSheet), mLoader(aLoader), mURI(aURI),
+    mInnerWindowID(0), mErrorLineNumber(0), mPrevErrorLineNumber(0),
+    mErrorColNumber(0)
+{
+}
+
+ErrorReporter::~ErrorReporter()
+{
+  // Schedule deferred cleanup for cached data. We want to strike a
+  // balance between performance and memory usage, so we only allow
+  // short-term caching.
+  if (sSpecCache && sSpecCache->IsInUse() && !sSpecCache->IsPending()) {
+    if (NS_FAILED(NS_DispatchToCurrentThread(sSpecCache))) {
+      // Peform the "deferred" cleanup immediately if the dispatch fails.
+      sSpecCache->Run();
+    } else {
+      sSpecCache->SetPending();
+    }
+  }
+}
+
+void
+ErrorReporter::OutputError()
+{
+  if (mError.IsEmpty()) {
+    return;
+  }
+  if (!ShouldReportErrors()) {
+    ClearError();
+    return;
+  }
+
+  if (mInnerWindowID == 0 && (mSheet || mLoader)) {
+    if (mSheet) {
+      mInnerWindowID = mSheet->FindOwningWindowInnerID();
+    }
+    if (mInnerWindowID == 0 && mLoader) {
+      nsIDocument* doc = mLoader->GetDocument();
+      if (doc) {
+        mInnerWindowID = doc->InnerWindowID();
+      }
+    }
+    // don't attempt this again, even if we failed
+    mSheet = nullptr;
+    mLoader = nullptr;
+  }
+
+  if (mFileName.IsEmpty()) {
+    if (mURI) {
+      if (!sSpecCache) {
+        sSpecCache = new ShortTermURISpecCache;
+        NS_ADDREF(sSpecCache);
+      }
+      mFileName = sSpecCache->GetSpec(mURI);
+      mURI = nullptr;
+    } else {
+      mFileName.AssignLiteral("from DOM");
+    }
+  }
+
+  nsresult rv;
+  nsCOMPtr<nsIScriptError> errorObject =
+    do_CreateInstance(sScriptErrorFactory, &rv);
+
+  if (NS_SUCCEEDED(rv)) {
+    rv = errorObject->InitWithWindowID(mError,
+                                       mFileName,
+                                       mErrorLine,
+                                       mErrorLineNumber,
+                                       mErrorColNumber,
+                                       nsIScriptError::warningFlag,
+                                       "CSS Parser",
+                                       mInnerWindowID);
+    if (NS_SUCCEEDED(rv)) {
+      sConsoleService->LogMessage(errorObject);
+    }
+  }
+
+  ClearError();
+}
+
+void
+ErrorReporter::OutputError(uint32_t aLineNumber, uint32_t aLineOffset)
+{
+  mErrorLineNumber = aLineNumber;
+  mErrorColNumber = aLineOffset;
+  OutputError();
+}
+
+void
+ErrorReporter::ClearError()
+{
+  mError.Truncate();
+}
+
+void
+ErrorReporter::AddToError(const nsString &aErrorText)
+{
+  if (!ShouldReportErrors()) return;
+
+  if (mError.IsEmpty()) {
+    mError = aErrorText;
+    mErrorLineNumber = mScanner->GetLineNumber();
+    mErrorColNumber = mScanner->GetColumnNumber();
+    // Retrieve the error line once per line, and reuse the same nsString
+    // for all errors on that line.  That causes the text of the line to
+    // be shared among all the nsIScriptError objects.
+    if (mErrorLine.IsEmpty() || mErrorLineNumber != mPrevErrorLineNumber) {
+      // Be careful here: the error line might be really long and OOM
+      // when we try to make a copy here.  If so, just leave it empty.
+      if (!mErrorLine.Assign(mScanner->GetCurrentLine(), fallible)) {
+        mErrorLine.Truncate();
+      }
+      mPrevErrorLineNumber = mErrorLineNumber;
+    }
+  } else {
+    mError.AppendLiteral("  ");
+    mError.Append(aErrorText);
+  }
+}
+
+void
+ErrorReporter::ReportUnexpected(const char *aMessage)
+{
+  if (!ShouldReportErrors()) return;
+
+  nsAutoString str;
+  sStringBundle->GetStringFromName(NS_ConvertASCIItoUTF16(aMessage).get(),
+                                   getter_Copies(str));
+  AddToError(str);
+}
+
+void
+ErrorReporter::ReportUnexpected(const char *aMessage,
+                                const nsString &aParam)
+{
+  if (!ShouldReportErrors()) return;
+
+  nsAutoString qparam;
+  nsStyleUtil::AppendEscapedCSSIdent(aParam, qparam);
+  const char16_t *params[1] = { qparam.get() };
+
+  nsAutoString str;
+  sStringBundle->FormatStringFromName(NS_ConvertASCIItoUTF16(aMessage).get(),
+                                      params, ArrayLength(params),
+                                      getter_Copies(str));
+  AddToError(str);
+}
+
+void
+ErrorReporter::ReportUnexpected(const char *aMessage,
+                                const nsCSSToken &aToken)
+{
+  if (!ShouldReportErrors()) return;
+
+  nsAutoString tokenString;
+  aToken.AppendToString(tokenString);
+  const char16_t *params[1] = { tokenString.get() };
+
+  nsAutoString str;
+  sStringBundle->FormatStringFromName(NS_ConvertASCIItoUTF16(aMessage).get(),
+                                      params, ArrayLength(params),
+                                      getter_Copies(str));
+  AddToError(str);
+}
+
+void
+ErrorReporter::ReportUnexpected(const char *aMessage,
+                                const nsCSSToken &aToken,
+                                char16_t aChar)
+{
+  if (!ShouldReportErrors()) return;
+
+  nsAutoString tokenString;
+  aToken.AppendToString(tokenString);
+  const char16_t charStr[2] = { aChar, 0 };
+  const char16_t *params[2] = { tokenString.get(), charStr };
+
+  nsAutoString str;
+  sStringBundle->FormatStringFromName(NS_ConvertASCIItoUTF16(aMessage).get(),
+                                      params, ArrayLength(params),
+                                      getter_Copies(str));
+  AddToError(str);
+}
+
+void
+ErrorReporter::ReportUnexpected(const char *aMessage,
+                                const nsString &aParam,
+                                const nsString &aValue)
+{
+  if (!ShouldReportErrors()) return;
+
+  nsAutoString qparam;
+  nsStyleUtil::AppendEscapedCSSIdent(aParam, qparam);
+  const char16_t *params[2] = { qparam.get(), aValue.get() };
+
+  nsAutoString str;
+  sStringBundle->FormatStringFromName(NS_ConvertASCIItoUTF16(aMessage).get(),
+                                      params, ArrayLength(params),
+                                      getter_Copies(str));
+  AddToError(str);
+}
+
+void
+ErrorReporter::ReportUnexpectedEOF(const char *aMessage)
+{
+  if (!ShouldReportErrors()) return;
+
+  nsAutoString innerStr;
+  sStringBundle->GetStringFromName(NS_ConvertASCIItoUTF16(aMessage).get(),
+                                   getter_Copies(innerStr));
+  const char16_t *params[1] = { innerStr.get() };
+
+  nsAutoString str;
+  sStringBundle->FormatStringFromName(u"PEUnexpEOF2",
+                                      params, ArrayLength(params),
+                                      getter_Copies(str));
+  AddToError(str);
+}
+
+void
+ErrorReporter::ReportUnexpectedEOF(char16_t aExpected)
+{
+  if (!ShouldReportErrors()) return;
+
+  const char16_t expectedStr[] = {
+    char16_t('\''), aExpected, char16_t('\''), char16_t(0)
+  };
+  const char16_t *params[1] = { expectedStr };
+
+  nsAutoString str;
+  sStringBundle->FormatStringFromName(u"PEUnexpEOF2",
+                                      params, ArrayLength(params),
+                                      getter_Copies(str));
+  AddToError(str);
+}
+
+} // namespace css
+} // namespace mozilla
+
+#endif