Expose APIs for text track settings

Source/core/css/resolver/StyleResolver.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, 2013 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 59 matching lines @@
 #include "core/css/resolver/ViewportStyleResolver.h"
 #include "core/dom/CSSSelectorWatch.h"
 #include "core/dom/FirstLetterPseudoElement.h"
 #include "core/dom/NodeLayoutStyle.h"
 #include "core/dom/StyleEngine.h"
 #include "core/dom/Text.h"
 #include "core/dom/shadow/ElementShadow.h"
 #include "core/dom/shadow/ShadowRoot.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
+#include "core/frame/Settings.h"
 #include "core/html/HTMLIFrameElement.h"
 #include "core/inspector/InspectorInstrumentation.h"
 #include "core/layout/LayoutView.h"
 #include "core/layout/style/KeyframeList.h"
 #include "core/svg/SVGDocumentExtensions.h"
 #include "core/svg/SVGElement.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "wtf/StdLibExtras.h"
 
 namespace {
@@ skipping 1091 matching lines @@
     // Properties that we currently support outside of spec.
     case CSSPropertyWebkitLineBoxContain:
     case CSSPropertyVisibility:
         return true;
 
     default:
         return false;
     }
 }
 
+static bool shouldIgnoreTextTrackAuthorStyle(Document& document)
+{
+    Settings* settings = document.settings();
+    if (!settings)
+        return false;
+    // Ignore author specified settings for text tracks when any of the user settings are present.
+    if (!settings->textTrackBackgroundColor().isEmpty()
+        || !settings->textTrackFontFamily().isEmpty()
+        || !settings->textTrackFontStyle().isEmpty()
+        || !settings->textTrackFontVariant().isEmpty()
+        || !settings->textTrackTextColor().isEmpty()
+        || !settings->textTrackTextShadow().isEmpty()
+        || !settings->textTrackTextSize().isEmpty())
+        return true;
+    return false;
+}
+
 // This method expands the 'all' shorthand property to longhand properties
 // and applies the expanded longhand properties.
 template <CSSPropertyPriority priority>
 void StyleResolver::applyAllProperty(StyleResolverState& state, CSSValue* allValue, bool inheritedOnly)
 {
     bool isUnsetValue = !allValue->isInitialValue() && !allValue->isInheritedValue();
     unsigned startCSSProperty = CSSPropertyPriorityData<priority>::first();
     unsigned endCSSProperty = CSSPropertyPriorityData<priority>::last();
 
     for (unsigned i = startCSSProperty; i <= endCSSProperty; ++i) {
@@ skipping 38 matching lines @@
         StylePropertySet::PropertyReference current = properties->propertyAt(i);
         if (isImportant != current.isImportant())
             continue;
 
         CSSPropertyID property = current.id();
         if (property == CSSPropertyAll) {
             applyAllProperty<priority>(state, current.value(), inheritedOnly);
             continue;
         }
 
-        if (propertyWhitelistType == PropertyWhitelistCue && !isValidCueStyleProperty(property))
+        if (propertyWhitelistType == PropertyWhitelistCue && (!isValidCueStyleProperty(property) || shouldIgnoreTextTrackAuthorStyle(document())))
             continue;
+
         if (propertyWhitelistType == PropertyWhitelistFirstLetter && !isValidFirstLetterStyleProperty(property))
             continue;
 
         if (inheritedOnly && !current.isInherited()) {
             // If the property value is explicitly inherited, we need to apply further non-inherited properties
             // as they might override the value inherited here. For this reason we don't allow declarations with
             // explicitly inherited properties to be cached.
             ASSERT(!current.value()->isInheritedValue());
             continue;
         }
@@ skipping 239 matching lines @@
     visitor->trace(m_watchedSelectorsRules);
     visitor->trace(m_treeBoundaryCrossingRules);
     visitor->trace(m_styleResourceLoader);
     visitor->trace(m_styleSharingLists);
     visitor->trace(m_pendingStyleSheets);
     visitor->trace(m_document);
 #endif
 }
 
 } // namespace blink