1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
|
/*
* 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/frame/PinchViewport.h"
#include "platform/heap/Handle.h"
#include "wtf/FastAllocBase.h"
#include "wtf/Noncopyable.h"
#include "wtf/OwnPtr.h"
#include "wtf/PassOwnPtr.h"
namespace blink {
class Chrome;
class ConsoleMessageStorage;
class EventHandlerRegistry;
class Page;
class PinchViewport;
class Settings;
class UseCounter;
class Visitor;
// 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 FrameHost final : public NoBaseWillBeGarbageCollectedFinalized<FrameHost> {
WTF_MAKE_NONCOPYABLE(FrameHost); WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
public:
static PassOwnPtrWillBeRawPtr<FrameHost> create(Page&);
~FrameHost();
// Careful: This function will eventually be removed.
Page& page() const { return *m_page; }
Settings& settings() const;
Chrome& chrome() const;
UseCounter& useCounter() 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.
float deviceScaleFactor() const;
PinchViewport& pinchViewport() const;
EventHandlerRegistry& eventHandlerRegistry() const;
const AtomicString& overrideEncoding() const { return m_overrideEncoding; }
void setOverrideEncoding(const AtomicString& encoding) { m_overrideEncoding = encoding; }
ConsoleMessageStorage& consoleMessageStorage() const;
void trace(Visitor*);
// 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;
private:
explicit FrameHost(Page&);
RawPtrWillBeMember<Page> m_page;
const OwnPtrWillBeMember<PinchViewport> m_pinchViewport;
const OwnPtrWillBeMember<EventHandlerRegistry> m_eventHandlerRegistry;
const OwnPtrWillBeMember<ConsoleMessageStorage> m_consoleMessageStorage;
AtomicString m_overrideEncoding;
int m_subframeCount;
};
}
#endif // FrameHost_h
|
