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
|
/*
* Copyright (C) 2011 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:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY GOOGLE INC. AND ITS 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 GOOGLE INC.
* OR ITS 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 PageOverlay_h
#define PageOverlay_h
#include "platform/graphics/GraphicsLayer.h"
#include "platform/graphics/GraphicsLayerClient.h"
#include "platform/graphics/paint/DisplayItemClient.h"
#include "web/WebExport.h"
#include "wtf/OwnPtr.h"
#include "wtf/PassOwnPtr.h"
#include "wtf/text/WTFString.h"
namespace blink {
class GraphicsContext;
class WebPageOverlay;
class WebViewImpl;
// Manages a layer that is overlaid on a WebView's content.
// Clients can paint by implementing WebPageOverlay.
//
// With Slimming Paint, internal clients can extract a GraphicsContext to add
// to the PaintController owned by the GraphicsLayer
class WEB_EXPORT PageOverlay : public GraphicsLayerClient, public DisplayItemClient {
public:
class Delegate : public GarbageCollectedFinalized<Delegate> {
public:
DEFINE_INLINE_VIRTUAL_TRACE() { }
// Paints page overlay contents.
virtual void paintPageOverlay(const PageOverlay&, GraphicsContext&, const WebSize& webViewSize) const = 0;
virtual ~Delegate() { }
};
static PassOwnPtr<PageOverlay> create(WebViewImpl*, PageOverlay::Delegate*);
~PageOverlay();
void update();
GraphicsLayer* graphicsLayer() const { return m_layer.get(); }
// DisplayItemClient methods.
String debugName() const final { return "PageOverlay"; }
// TODO(chrishtr): fix this.
LayoutRect visualRect() const override { return LayoutRect(); }
// GraphicsLayerClient implementation
IntRect computeInterestRect(const GraphicsLayer*, const IntRect&) const override;
void paintContents(const GraphicsLayer*, GraphicsContext&, GraphicsLayerPaintingPhase, const IntRect& interestRect) const override;
String debugName(const GraphicsLayer*) const override;
private:
PageOverlay(WebViewImpl*, PageOverlay::Delegate*);
WebViewImpl* m_viewImpl;
Persistent<PageOverlay::Delegate> m_delegate;
OwnPtr<GraphicsLayer> m_layer;
};
} // namespace blink
#endif // PageOverlay_h
|
