Display MathML fallback content when it is specified and take into account inline/display modes for…

Source/core/css/CSSDefaultStyleSheets.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
@@ skipping 11 matching lines @@
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #include "config.h"
 #include "core/css/CSSDefaultStyleSheets.h"
 
+#include "MathMLNames.h"
 #include "UserAgentStyleSheets.h"
 #include "core/css/MediaQueryEvaluator.h"
 #include "core/css/RuleSet.h"
 #include "core/css/StyleSheetContents.h"
 #include "core/dom/FullscreenElementStack.h"
 #include "core/html/HTMLAnchorElement.h"
 #include "core/html/HTMLHtmlElement.h"
 #include "core/rendering/RenderTheme.h"
 
 namespace WebCore {
 
 using namespace HTMLNames;
 
 RuleSet* CSSDefaultStyleSheets::defaultStyle;
 RuleSet* CSSDefaultStyleSheets::defaultViewportStyle;
 RuleSet* CSSDefaultStyleSheets::defaultQuirksStyle;
 RuleSet* CSSDefaultStyleSheets::defaultPrintStyle;
 RuleSet* CSSDefaultStyleSheets::defaultViewSourceStyle;
 RuleSet* CSSDefaultStyleSheets::defaultXHTMLMobileProfileStyle;
 
 StyleSheetContents* CSSDefaultStyleSheets::defaultStyleSheet;
 StyleSheetContents* CSSDefaultStyleSheets::viewportStyleSheet;
 StyleSheetContents* CSSDefaultStyleSheets::quirksStyleSheet;
 StyleSheetContents* CSSDefaultStyleSheets::svgStyleSheet;
+StyleSheetContents* CSSDefaultStyleSheets::mathmlStyleSheet;
 StyleSheetContents* CSSDefaultStyleSheets::mediaControlsStyleSheet;
 StyleSheetContents* CSSDefaultStyleSheets::fullscreenStyleSheet;
 
 static const MediaQueryEvaluator& screenEval()
 {
     DEFINE_STATIC_LOCAL(const MediaQueryEvaluator, staticScreenEval, ("screen"));
     return staticScreenEval;
 }
 
 static const MediaQueryEvaluator& printEval()
@@ skipping 68 matching lines @@
 void CSSDefaultStyleSheets::ensureDefaultStyleSheetsForElement(Element* element, bool& changedDefaultStyle)
 {
     // FIXME: We should assert that the sheet only styles SVG elements.
     if (element->isSVGElement() && !svgStyleSheet) {
         svgStyleSheet = parseUASheet(svgUserAgentStyleSheet, sizeof(svgUserAgentStyleSheet));
         defaultStyle->addRulesFromSheet(svgStyleSheet, screenEval());
         defaultPrintStyle->addRulesFromSheet(svgStyleSheet, printEval());
         changedDefaultStyle = true;
     }
 
+    // FIXME: We should assert that the sheet only styles MathML elements.
+    if (element->namespaceURI() == MathMLNames::mathmlNamespaceURI
+    && !mathmlStyleSheet) {
+        mathmlStyleSheet = parseUASheet(mathmlUserAgentStyleSheet,
+    sizeof(mathmlUserAgentStyleSheet));
+        defaultStyle->addRulesFromSheet(mathmlStyleSheet, screenEval());
+        defaultPrintStyle->addRulesFromSheet(mathmlStyleSheet, printEval());
+        changedDefaultStyle = true;
+    }
+
     // FIXME: We should assert that this sheet only contains rules for <video> and <audio>.
     if (!mediaControlsStyleSheet && (element->hasTagName(videoTag) || element->hasTagName(audioTag))) {
         String mediaRules = String(mediaControlsUserAgentStyleSheet, sizeof(mediaControlsUserAgentStyleSheet)) + RenderTheme::theme().extraMediaControlsStyleSheet();
         mediaControlsStyleSheet = parseUASheet(mediaRules);
         defaultStyle->addRulesFromSheet(mediaControlsStyleSheet, screenEval());
         defaultPrintStyle->addRulesFromSheet(mediaControlsStyleSheet, printEval());
         changedDefaultStyle = true;
     }
 
     // FIXME: This only works because we Force recalc the entire document so the new sheet
     // is loaded for <html> and the correct styles apply to everyone.
     if (!fullscreenStyleSheet && FullscreenElementStack::isFullScreen(&element->document())) {
         String fullscreenRules = String(fullscreenUserAgentStyleSheet, sizeof(fullscreenUserAgentStyleSheet)) + RenderTheme::theme().extraFullScreenStyleSheet();
         fullscreenStyleSheet = parseUASheet(fullscreenRules);
         defaultStyle->addRulesFromSheet(fullscreenStyleSheet, screenEval());
         defaultQuirksStyle->addRulesFromSheet(fullscreenStyleSheet, screenEval());
         changedDefaultStyle = true;
     }
 
     ASSERT(defaultStyle->features().idsInRules.isEmpty());
     ASSERT(defaultStyle->features().siblingRules.isEmpty());
 }
 
 } // namespace WebCore