1 /*
2 * Copyright (C) 2013 Google 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 are
6 * met:
7 *
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 * * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "config.h"
32 #include "web/FullscreenController.h"
33
34 #include "core/dom/Document.h"
35 #include "core/dom/FullscreenElementStack.h"
36 #include "core/frame/LocalFrame.h"
37 #include "core/html/HTMLMediaElement.h"
38 #include "platform/LayoutTestSupport.h"
39 #include "platform/RuntimeEnabledFeatures.h"
40 #include "public/web/WebFrame.h"
41 #include "public/web/WebViewClient.h"
42 #include "web/WebSettingsImpl.h"
43 #include "web/WebViewImpl.h"
44
45 using namespace WebCore;
46
47 namespace blink {
48
create(WebViewImpl * webViewImpl)49 PassOwnPtr<FullscreenController> FullscreenController::create(WebViewImpl* webViewImpl)
50 {
51 return adoptPtr(new FullscreenController(webViewImpl));
52 }
53
FullscreenController(WebViewImpl * webViewImpl)54 FullscreenController::FullscreenController(WebViewImpl* webViewImpl)
55 : m_webViewImpl(webViewImpl)
56 , m_exitFullscreenPageScaleFactor(0)
57 , m_isCancelingFullScreen(false)
58 {
59 }
60
willEnterFullScreen()61 void FullscreenController::willEnterFullScreen()
62 {
63 if (!m_provisionalFullScreenElement)
64 return;
65
66 // Ensure that this element's document is still attached.
67 Document& doc = m_provisionalFullScreenElement->document();
68 if (doc.frame()) {
69 FullscreenElementStack::from(doc).webkitWillEnterFullScreenForElement(m_provisionalFullScreenElement.get());
70 m_fullScreenFrame = doc.frame();
71 }
72 m_provisionalFullScreenElement.clear();
73 }
74
didEnterFullScreen()75 void FullscreenController::didEnterFullScreen()
76 {
77 if (!m_fullScreenFrame)
78 return;
79
80 if (Document* doc = m_fullScreenFrame->document()) {
81 if (FullscreenElementStack::isFullScreen(*doc)) {
82 if (!m_exitFullscreenPageScaleFactor) {
83 m_exitFullscreenPageScaleFactor = m_webViewImpl->pageScaleFactor();
84 m_exitFullscreenScrollOffset = m_webViewImpl->mainFrame()->scrollOffset();
85 m_exitFullscreenPinchViewportOffset = m_webViewImpl->pinchViewportOffset();
86 m_webViewImpl->setPageScaleFactor(1.0f);
87 m_webViewImpl->setMainFrameScrollOffset(IntPoint());
88 m_webViewImpl->setPinchViewportOffset(FloatPoint());
89 }
90
91 FullscreenElementStack::from(*doc).webkitDidEnterFullScreenForElement(0);
92 if (RuntimeEnabledFeatures::overlayFullscreenVideoEnabled()) {
93 Element* element = FullscreenElementStack::currentFullScreenElementFrom(*doc);
94 ASSERT(element);
95 if (isHTMLMediaElement(*element)) {
96 HTMLMediaElement* mediaElement = toHTMLMediaElement(element);
97 if (mediaElement->webMediaPlayer() && mediaElement->webMediaPlayer()->canEnterFullscreen()
98 // FIXME: There is no embedder-side handling in layout test mode.
99 && !isRunningLayoutTest()) {
100 mediaElement->webMediaPlayer()->enterFullscreen();
101 }
102 if (m_webViewImpl->layerTreeView())
103 m_webViewImpl->layerTreeView()->setHasTransparentBackground(true);
104 }
105 }
106 }
107 }
108 }
109
willExitFullScreen()110 void FullscreenController::willExitFullScreen()
111 {
112 if (!m_fullScreenFrame)
113 return;
114
115 if (Document* doc = m_fullScreenFrame->document()) {
116 FullscreenElementStack* fullscreen = FullscreenElementStack::fromIfExists(*doc);
117 if (!fullscreen)
118 return;
119 if (fullscreen->isFullScreen(*doc)) {
120 // When the client exits from full screen we have to call webkitCancelFullScreen to
121 // notify the document. While doing that, suppress notifications back to the client.
122 m_isCancelingFullScreen = true;
123 fullscreen->webkitCancelFullScreen();
124 m_isCancelingFullScreen = false;
125 fullscreen->webkitWillExitFullScreenForElement(0);
126 if (RuntimeEnabledFeatures::overlayFullscreenVideoEnabled() && m_webViewImpl->layerTreeView())
127 m_webViewImpl->layerTreeView()->setHasTransparentBackground(m_webViewImpl->isTransparent());
128 }
129 }
130 }
131
didExitFullScreen()132 void FullscreenController::didExitFullScreen()
133 {
134 if (!m_fullScreenFrame)
135 return;
136
137 if (Document* doc = m_fullScreenFrame->document()) {
138 if (FullscreenElementStack* fullscreen = FullscreenElementStack::fromIfExists(*doc)) {
139 if (fullscreen->webkitIsFullScreen()) {
140 if (m_exitFullscreenPageScaleFactor) {
141 m_webViewImpl->setPageScaleFactor(m_exitFullscreenPageScaleFactor);
142 m_webViewImpl->setMainFrameScrollOffset(IntPoint(m_exitFullscreenScrollOffset));
143 m_webViewImpl->setPinchViewportOffset(m_exitFullscreenPinchViewportOffset);
144 m_exitFullscreenPageScaleFactor = 0;
145 m_exitFullscreenScrollOffset = IntSize();
146 }
147
148 fullscreen->webkitDidExitFullScreenForElement(0);
149 }
150 }
151 }
152
153 m_fullScreenFrame.clear();
154 }
155
enterFullScreenForElement(WebCore::Element * element)156 void FullscreenController::enterFullScreenForElement(WebCore::Element* element)
157 {
158 // We are already transitioning to fullscreen for a different element.
159 if (m_provisionalFullScreenElement) {
160 m_provisionalFullScreenElement = element;
161 return;
162 }
163
164 // We are already in fullscreen mode.
165 if (m_fullScreenFrame) {
166 m_provisionalFullScreenElement = element;
167 willEnterFullScreen();
168 didEnterFullScreen();
169 return;
170 }
171
172 // We need to transition to fullscreen mode.
173 if (WebViewClient* client = m_webViewImpl->client()) {
174 if (client->enterFullScreen())
175 m_provisionalFullScreenElement = element;
176 }
177 }
178
exitFullScreenForElement(WebCore::Element * element)179 void FullscreenController::exitFullScreenForElement(WebCore::Element* element)
180 {
181 // The client is exiting full screen, so don't send a notification.
182 if (m_isCancelingFullScreen)
183 return;
184 if (WebViewClient* client = m_webViewImpl->client())
185 client->exitFullScreen();
186 }
187
188 }
189
190