1 /*
2 * Copyright (C) 2010 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include "config.h"
27 #include "ChunkedUpdateDrawingArea.h"
28
29 #include "DrawingAreaMessageKinds.h"
30 #include "DrawingAreaProxyMessageKinds.h"
31 #include "MessageID.h"
32 #include "UpdateChunk.h"
33 #include "WebCoreArgumentCoders.h"
34 #include "WebPage.h"
35 #include "WebProcess.h"
36
37 using namespace WebCore;
38
39 namespace WebKit {
40
ChunkedUpdateDrawingArea(WebPage * webPage)41 ChunkedUpdateDrawingArea::ChunkedUpdateDrawingArea(WebPage* webPage)
42 : DrawingArea(DrawingAreaTypeChunkedUpdate, webPage)
43 , m_isWaitingForUpdate(false)
44 , m_paintingIsSuspended(false)
45 , m_displayTimer(WebProcess::shared().runLoop(), this, &ChunkedUpdateDrawingArea::display)
46 {
47 }
48
~ChunkedUpdateDrawingArea()49 ChunkedUpdateDrawingArea::~ChunkedUpdateDrawingArea()
50 {
51 }
52
scroll(const IntRect & scrollRect,const IntSize & scrollOffset)53 void ChunkedUpdateDrawingArea::scroll(const IntRect& scrollRect, const IntSize& scrollOffset)
54 {
55 // FIXME: Do something much smarter.
56 setNeedsDisplay(scrollRect);
57 }
58
setNeedsDisplay(const IntRect & rect)59 void ChunkedUpdateDrawingArea::setNeedsDisplay(const IntRect& rect)
60 {
61 // FIXME: Collect a set of rects/region instead of just the union
62 // of all rects.
63 m_dirtyRect.unite(rect);
64 scheduleDisplay();
65 }
66
display()67 void ChunkedUpdateDrawingArea::display()
68 {
69 ASSERT(!m_isWaitingForUpdate);
70
71 if (m_paintingIsSuspended)
72 return;
73
74 if (m_dirtyRect.isEmpty())
75 return;
76
77 // Layout if necessary.
78 m_webPage->layoutIfNeeded();
79
80 IntRect dirtyRect = m_dirtyRect;
81 m_dirtyRect = IntRect();
82
83 // Create a new UpdateChunk and paint into it.
84 UpdateChunk updateChunk(dirtyRect);
85 paintIntoUpdateChunk(&updateChunk);
86
87 WebProcess::shared().connection()->deprecatedSend(DrawingAreaProxyLegacyMessage::Update, m_webPage->pageID(), CoreIPC::In(updateChunk));
88
89 m_isWaitingForUpdate = true;
90 m_displayTimer.stop();
91 }
92
forceRepaint()93 void ChunkedUpdateDrawingArea::forceRepaint()
94 {
95 m_isWaitingForUpdate = false;
96 display();
97 }
98
scheduleDisplay()99 void ChunkedUpdateDrawingArea::scheduleDisplay()
100 {
101 if (m_paintingIsSuspended)
102 return;
103
104 if (m_isWaitingForUpdate)
105 return;
106
107 if (m_dirtyRect.isEmpty())
108 return;
109
110 if (m_displayTimer.isActive())
111 return;
112
113 m_displayTimer.startOneShot(0);
114 }
115
setSize(const IntSize & viewSize)116 void ChunkedUpdateDrawingArea::setSize(const IntSize& viewSize)
117 {
118 ASSERT_ARG(viewSize, !viewSize.isEmpty());
119
120 // We don't want to wait for an update until we display.
121 m_isWaitingForUpdate = false;
122
123 m_webPage->setSize(viewSize);
124 m_webPage->layoutIfNeeded();
125
126 if (m_paintingIsSuspended) {
127 ASSERT(!m_displayTimer.isActive());
128
129 // Painting is suspended, just send back an empty update chunk.
130 WebProcess::shared().connection()->deprecatedSend(DrawingAreaProxyLegacyMessage::DidSetSize, m_webPage->pageID(), CoreIPC::In(UpdateChunk()));
131 return;
132 }
133
134 // Create a new UpdateChunk and paint into it.
135 UpdateChunk updateChunk(IntRect(0, 0, viewSize.width(), viewSize.height()));
136 paintIntoUpdateChunk(&updateChunk);
137
138 m_displayTimer.stop();
139
140 WebProcess::shared().connection()->deprecatedSend(DrawingAreaProxyLegacyMessage::DidSetSize, m_webPage->pageID(), CoreIPC::In(updateChunk));
141 }
142
suspendPainting()143 void ChunkedUpdateDrawingArea::suspendPainting()
144 {
145 ASSERT(!m_paintingIsSuspended);
146
147 m_paintingIsSuspended = true;
148 m_displayTimer.stop();
149 }
150
deprecatedResumePainting(bool forceRepaint)151 void ChunkedUpdateDrawingArea::deprecatedResumePainting(bool forceRepaint)
152 {
153 ASSERT(m_paintingIsSuspended);
154
155 m_paintingIsSuspended = false;
156
157 if (forceRepaint) {
158 // Just set the dirty rect to the entire page size.
159 m_dirtyRect = m_webPage->bounds();
160 }
161
162 // Schedule a display.
163 scheduleDisplay();
164 }
165
didUpdate()166 void ChunkedUpdateDrawingArea::didUpdate()
167 {
168 m_isWaitingForUpdate = false;
169
170 // Display if needed.
171 display();
172 }
173
didReceiveMessage(CoreIPC::Connection *,CoreIPC::MessageID messageID,CoreIPC::ArgumentDecoder * arguments)174 void ChunkedUpdateDrawingArea::didReceiveMessage(CoreIPC::Connection*, CoreIPC::MessageID messageID, CoreIPC::ArgumentDecoder* arguments)
175 {
176 switch (messageID.get<DrawingAreaLegacyMessage::Kind>()) {
177 case DrawingAreaLegacyMessage::SetSize: {
178 IntSize size;
179 if (!arguments->decode(CoreIPC::Out(size)))
180 return;
181
182 setSize(size);
183 break;
184 }
185
186 case DrawingAreaLegacyMessage::SuspendPainting:
187 suspendPainting();
188 break;
189
190 case DrawingAreaLegacyMessage::ResumePainting: {
191 bool forceRepaint;
192 if (!arguments->decode(CoreIPC::Out(forceRepaint)))
193 return;
194
195 deprecatedResumePainting(forceRepaint);
196 break;
197 }
198 case DrawingAreaLegacyMessage::DidUpdate:
199 didUpdate();
200 break;
201
202 default:
203 ASSERT_NOT_REACHED();
204 break;
205 }
206 }
207
208 } // namespace WebKit
209