| /* |
| * Copyright (C) 2013 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. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * 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 FrameHost_h |
| #define FrameHost_h |
| |
| #include "core/CoreExport.h" |
| #include "platform/heap/Handle.h" |
| #include "wtf/Allocator.h" |
| #include "wtf/Noncopyable.h" |
| #include "wtf/OwnPtr.h" |
| #include "wtf/PassOwnPtr.h" |
| #include "wtf/text/AtomicString.h" |
| |
| namespace blink { |
| |
| class ChromeClient; |
| class ConsoleMessageStorage; |
| class CustomElementReactionStack; |
| class Deprecation; |
| class EventHandlerRegistry; |
| class OverscrollController; |
| class Page; |
| struct PageScaleConstraints; |
| class PageScaleConstraintsSet; |
| class RootScroller; |
| class Settings; |
| class TopControls; |
| class UseCounter; |
| class Visitor; |
| class VisualViewport; |
| |
| // FrameHost is the set of global data shared between multiple frames |
| // and is provided by the embedder to each frame when created. |
| // FrameHost currently corresponds to the Page object in core/page |
| // however the concept of a Page is moving up out of Blink. |
| // In an out-of-process iframe world, a single Page may have |
| // multiple frames in different process, thus Page becomes a |
| // browser-level concept and Blink core/ only knows about its LocalFrame (and FrameHost). |
| // Separating Page from the rest of core/ through this indirection |
| // allows us to slowly refactor Page without breaking the rest of core. |
| class CORE_EXPORT FrameHost final : public GarbageCollectedFinalized<FrameHost> { |
| WTF_MAKE_NONCOPYABLE(FrameHost); |
| public: |
| static FrameHost* create(Page&); |
| ~FrameHost(); |
| |
| // Careful: This function will eventually be removed. |
| Page& page(); |
| const Page& page() const; |
| |
| Settings& settings(); |
| const Settings& settings() const; |
| |
| ChromeClient& chromeClient(); |
| const ChromeClient& chromeClient() const; |
| |
| UseCounter& useCounter(); |
| const UseCounter& useCounter() const; |
| |
| Deprecation& deprecation(); |
| const Deprecation& deprecation() const; |
| |
| // Corresponds to pixel density of the device where this Page is |
| // being displayed. In multi-monitor setups this can vary between pages. |
| // This value does not account for Page zoom, use LocalFrame::devicePixelRatio instead. |
| // This is to be deprecated. Use this with caution. |
| // 1) If you need to scale the content per device scale factor, this is still valid. |
| // In use-zoom-for-dsf mode, this is always 1, and will be remove when transition is complete. |
| // 2) If you want to compute the device related measure (such as device pixel height, or the scale factor for drag image), |
| // use ChromeClient::screenInfo() instead. |
| float deviceScaleFactorDeprecated() const; |
| |
| RootScroller* rootScroller(); |
| const RootScroller* rootScroller() const; |
| |
| TopControls& topControls(); |
| const TopControls& topControls() const; |
| |
| OverscrollController& overscrollController(); |
| const OverscrollController& overscrollController() const; |
| |
| VisualViewport& visualViewport(); |
| const VisualViewport& visualViewport() const; |
| |
| PageScaleConstraintsSet& pageScaleConstraintsSet(); |
| const PageScaleConstraintsSet& pageScaleConstraintsSet() const; |
| |
| EventHandlerRegistry& eventHandlerRegistry(); |
| const EventHandlerRegistry& eventHandlerRegistry() const; |
| |
| const AtomicString& overrideEncoding() const { return m_overrideEncoding; } |
| void setOverrideEncoding(const AtomicString& encoding) { m_overrideEncoding = encoding; } |
| |
| ConsoleMessageStorage& consoleMessageStorage(); |
| const ConsoleMessageStorage& consoleMessageStorage() const; |
| |
| CustomElementReactionStack& customElementReactionStack(); |
| const CustomElementReactionStack& customElementReactionStack() const; |
| |
| DECLARE_TRACE(); |
| |
| // Don't allow more than a certain number of frames in a page. |
| // This seems like a reasonable upper bound, and otherwise mutually |
| // recursive frameset pages can quickly bring the program to its knees |
| // with exponential growth in the number of frames. |
| static const int maxNumberOfFrames = 1000; |
| void incrementSubframeCount() { ++m_subframeCount; } |
| void decrementSubframeCount() { ASSERT(m_subframeCount); --m_subframeCount; } |
| int subframeCount() const; |
| |
| void setDefaultPageScaleLimits(float minScale, float maxScale); |
| void setUserAgentPageScaleConstraints(const PageScaleConstraints& newConstraints); |
| |
| private: |
| explicit FrameHost(Page&); |
| |
| const Member<Page> m_page; |
| const Member<RootScroller> m_rootScroller; |
| const Member<TopControls> m_topControls; |
| const OwnPtr<PageScaleConstraintsSet> m_pageScaleConstraintsSet; |
| const Member<VisualViewport> m_visualViewport; |
| const Member<OverscrollController> m_overscrollController; |
| const Member<EventHandlerRegistry> m_eventHandlerRegistry; |
| const Member<ConsoleMessageStorage> m_consoleMessageStorage; |
| const Member<CustomElementReactionStack> m_customElementReactionStack; |
| |
| AtomicString m_overrideEncoding; |
| int m_subframeCount; |
| }; |
| |
| } // namespace blink |
| |
| #endif // FrameHost_h |