| /* |
| * Copyright (C) 2012 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef ContextFeatures_h |
| #define ContextFeatures_h |
| |
| #include "platform/RefCountedSupplement.h" |
| |
| namespace WebCore { |
| |
| class ContextFeaturesClient; |
| class Document; |
| class Page; |
| |
| #if ENABLE(OILPAN) |
| class ContextFeatures FINAL : public GarbageCollectedFinalized<ContextFeatures>, public HeapSupplement<Page> { |
| USING_GARBAGE_COLLECTED_MIXIN(ContextFeatures); |
| public: |
| typedef HeapSupplement<Page> SupplementType; |
| #else |
| class ContextFeatures : public RefCountedSupplement<Page, ContextFeatures> { |
| public: |
| typedef RefCountedSupplement<Page, ContextFeatures> SupplementType; |
| #endif |
| enum FeatureType { |
| DialogElement = 0, |
| PagePopup, |
| MutationEvents, |
| PushState, |
| FeatureTypeSize // Should be the last entry. |
| }; |
| |
| static const char* supplementName(); |
| static ContextFeatures* defaultSwitch(); |
| static PassRefPtrWillBeRawPtr<ContextFeatures> create(PassOwnPtr<ContextFeaturesClient>); |
| |
| static bool dialogElementEnabled(Document*); |
| static bool pagePopupEnabled(Document*); |
| static bool mutationEventsEnabled(Document*); |
| static bool pushStateEnabled(Document*); |
| |
| bool isEnabled(Document*, FeatureType, bool) const; |
| void urlDidChange(Document*); |
| |
| #if ENABLE(OILPAN) |
| virtual void trace(Visitor* visitor) OVERRIDE { HeapSupplement<Page>::trace(visitor); } |
| #endif |
| |
| private: |
| explicit ContextFeatures(PassOwnPtr<ContextFeaturesClient> client) |
| : m_client(client) |
| { } |
| |
| OwnPtr<ContextFeaturesClient> m_client; |
| }; |
| |
| class ContextFeaturesClient { |
| WTF_MAKE_FAST_ALLOCATED; |
| public: |
| static PassOwnPtr<ContextFeaturesClient> empty(); |
| |
| virtual ~ContextFeaturesClient() { } |
| virtual bool isEnabled(Document*, ContextFeatures::FeatureType, bool defaultValue) { return defaultValue; } |
| virtual void urlDidChange(Document*) { } |
| }; |
| |
| void provideContextFeaturesTo(Page&, PassOwnPtr<ContextFeaturesClient>); |
| void provideContextFeaturesToDocumentFrom(Document&, Page&); |
| |
| inline PassRefPtrWillBeRawPtr<ContextFeatures> ContextFeatures::create(PassOwnPtr<ContextFeaturesClient> client) |
| { |
| return adoptRefWillBeNoop(new ContextFeatures(client)); |
| } |
| |
| inline bool ContextFeatures::isEnabled(Document* document, FeatureType type, bool defaultValue) const |
| { |
| if (!m_client) |
| return defaultValue; |
| return m_client->isEnabled(document, type, defaultValue); |
| } |
| |
| inline void ContextFeatures::urlDidChange(Document* document) |
| { |
| // FIXME: The original code, commented out below, is obviously |
| // wrong, but the seemingly correct fix of negating the test to |
| // the more logical 'if (!m_client)' crashes the renderer. |
| // See issue 294180 |
| // |
| // if (m_client) |
| // return; |
| // m_client->urlDidChange(document); |
| } |
| |
| } // namespace WebCore |
| |
| #endif // ContextFeatures_h |