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93 lines
3.5 KiB
C++
93 lines
3.5 KiB
C++
/*
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* Copyright (C) 2013 Google Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef FrameHost_h
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#define FrameHost_h
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#include "core/frame/PinchViewport.h"
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#include "platform/heap/Handle.h"
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#include "wtf/FastAllocBase.h"
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#include "wtf/Noncopyable.h"
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#include "wtf/OwnPtr.h"
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#include "wtf/PassOwnPtr.h"
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namespace blink {
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class Chrome;
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class EventHandlerRegistry;
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class Page;
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class PinchViewport;
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class Settings;
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class UseCounter;
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class Visitor;
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// FrameHost is the set of global data shared between multiple frames
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// and is provided by the embedder to each frame when created.
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// FrameHost currently corresponds to the Page object in core/page
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// however the concept of a Page is moving up out of Blink.
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// In an out-of-process iframe world, a single Page may have
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// multiple frames in different process, thus Page becomes a
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// browser-level concept and Blink core/ only knows about its LocalFrame (and FrameHost).
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// Separating Page from the rest of core/ through this indirection
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// allows us to slowly refactor Page without breaking the rest of core.
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class FrameHost FINAL : public NoBaseWillBeGarbageCollectedFinalized<FrameHost> {
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WTF_MAKE_NONCOPYABLE(FrameHost); WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
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public:
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static PassOwnPtrWillBeRawPtr<FrameHost> create(Page&);
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~FrameHost();
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// Careful: This function will eventually be removed.
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Page& page() const { return *m_page; }
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Settings& settings() const;
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Chrome& chrome() const;
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UseCounter& useCounter() const;
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// Corresponds to pixel density of the device where this Page is
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// being displayed. In multi-monitor setups this can vary between pages.
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// This value does not account for Page zoom, use LocalFrame::devicePixelRatio instead.
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float deviceScaleFactor() const;
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PinchViewport& pinchViewport() const;
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EventHandlerRegistry& eventHandlerRegistry() const;
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void trace(Visitor*);
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private:
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explicit FrameHost(Page&);
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RawPtrWillBeMember<Page> m_page;
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const OwnPtr<PinchViewport> m_pinchViewport;
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const OwnPtrWillBeMember<EventHandlerRegistry> m_eventHandlerRegistry;
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};
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}
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#endif // FrameHost_h
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