1 /*
2 * Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies)
3 * Copyright (C) 2009 Girish Ramakrishnan <girish@forwardbias.in>
4 * Copyright (C) 2006 George Staikos <staikos@kde.org>
5 * Copyright (C) 2006 Dirk Mueller <mueller@kde.org>
6 * Copyright (C) 2006 Zack Rusin <zack@kde.org>
7 * Copyright (C) 2006 Simon Hausmann <hausmann@kde.org>
8 *
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
21 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
24 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
27 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
28 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 #include "webview.h"
34
35 #include <QtGui>
36 #include <QGraphicsScene>
37
WebViewGraphicsBased(QWidget * parent)38 WebViewGraphicsBased::WebViewGraphicsBased(QWidget* parent)
39 : QGraphicsView(parent)
40 , m_item(new GraphicsWebView)
41 , m_numPaintsTotal(0)
42 , m_numPaintsSinceLastMeasure(0)
43 , m_measureFps(false)
44 , m_resizesToContents(false)
45 , m_machine(0)
46 {
47 setScene(new QGraphicsScene(this));
48 scene()->addItem(m_item);
49 scene()->setFocusItem(m_item);
50
51 setFrameShape(QFrame::NoFrame);
52 setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
53 setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
54
55 m_updateTimer = new QTimer(this);
56 m_updateTimer->setInterval(1000);
57 connect(m_updateTimer, SIGNAL(timeout()), this, SLOT(updateFrameRate()));
58 }
59
setPage(QWebPage * page)60 void WebViewGraphicsBased::setPage(QWebPage* page)
61 {
62 connect(page->mainFrame(), SIGNAL(contentsSizeChanged(const QSize&)), SLOT(contentsSizeChanged(const QSize&)));
63 connect(page, SIGNAL(scrollRequested(int, int, const QRect&)), SLOT(scrollRequested(int, int)));
64 graphicsWebView()->setPage(page);
65 }
66
scrollRequested(int x,int y)67 void WebViewGraphicsBased::scrollRequested(int x, int y)
68 {
69 if (!m_resizesToContents)
70 return;
71
72 // Turn off interactive mode while scrolling, or QGraphicsView will replay the
73 // last mouse event which may cause WebKit to initiate a drag operation.
74 bool interactive = isInteractive();
75 setInteractive(false);
76
77 verticalScrollBar()->setValue(-y);
78 horizontalScrollBar()->setValue(-x);
79
80 setInteractive(interactive);
81 }
82
contentsSizeChanged(const QSize & size)83 void WebViewGraphicsBased::contentsSizeChanged(const QSize& size)
84 {
85 if (m_resizesToContents)
86 scene()->setSceneRect(0, 0, size.width(), size.height());
87 }
88
setResizesToContents(bool b)89 void WebViewGraphicsBased::setResizesToContents(bool b)
90 {
91 if (b == m_resizesToContents)
92 return;
93
94 m_resizesToContents = b;
95 graphicsWebView()->setResizesToContents(m_resizesToContents);
96
97 // When setting resizesToContents ON, our web view widget will always size as big as the
98 // web content being displayed, and so will the QWebPage's viewport. It implies that internally
99 // WebCore will work as if there was no content rendered offscreen, and then no scrollbars need
100 // drawing. In order to keep scrolling working, we:
101 //
102 // 1) Set QGraphicsView's scrollbars policy back to 'auto'.
103 // 2) Set scene's boundaries rect to an invalid size, which automatically makes it to be as big
104 // as it needs to enclose all items onto it. We do that because QGraphicsView also calculates
105 // the size of its scrollable area according to the amount of content in scene that is rendered
106 // offscreen.
107 // 3) Set QWebPage's preferredContentsSize according to the size of QGraphicsView's viewport,
108 // so WebCore properly lays pages out.
109 //
110 // On the other hand, when toggling resizesToContents OFF, we set back the default values, as
111 // opposite as described above.
112 if (m_resizesToContents) {
113 setHorizontalScrollBarPolicy(Qt::ScrollBarAsNeeded);
114 setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
115 graphicsWebView()->page()->setPreferredContentsSize(size());
116 QRectF itemRect(graphicsWebView()->geometry().topLeft(), graphicsWebView()->page()->mainFrame()->contentsSize());
117 graphicsWebView()->setGeometry(itemRect);
118 scene()->setSceneRect(itemRect);
119 } else {
120 setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
121 setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
122 graphicsWebView()->page()->setPreferredContentsSize(QSize());
123 QRect viewportRect(QPoint(0, 0), size());
124 graphicsWebView()->setGeometry(viewportRect);
125 scene()->setSceneRect(viewportRect);
126 }
127 }
128
resizeEvent(QResizeEvent * event)129 void WebViewGraphicsBased::resizeEvent(QResizeEvent* event)
130 {
131 QGraphicsView::resizeEvent(event);
132
133 QSize size(event->size());
134
135 if (m_resizesToContents) {
136 graphicsWebView()->page()->setPreferredContentsSize(size);
137 return;
138 }
139
140 QRectF rect(QPoint(0, 0), size);
141 graphicsWebView()->setGeometry(rect);
142 scene()->setSceneRect(rect);
143 }
144
setFrameRateMeasurementEnabled(bool enabled)145 void WebViewGraphicsBased::setFrameRateMeasurementEnabled(bool enabled)
146 {
147 m_measureFps = enabled;
148 if (m_measureFps) {
149 m_lastConsultTime = m_startTime = QTime::currentTime();
150 m_fpsTimer.start();
151 m_updateTimer->start();
152 } else {
153 m_fpsTimer.stop();
154 m_updateTimer->stop();
155 }
156 }
157
updateFrameRate()158 void WebViewGraphicsBased::updateFrameRate()
159 {
160 const QTime now = QTime::currentTime();
161 int interval = m_lastConsultTime.msecsTo(now);
162 int frames = m_fpsTimer.numFrames(interval);
163 int current = interval ? frames * 1000 / interval : 0;
164
165 emit currentFPSUpdated(current);
166
167 m_lastConsultTime = now;
168 }
169
animatedFlip()170 void WebViewGraphicsBased::animatedFlip()
171 {
172 #ifndef QT_NO_ANIMATION
173 QSizeF center = graphicsWebView()->boundingRect().size() / 2;
174 QPointF centerPoint = QPointF(center.width(), center.height());
175 graphicsWebView()->setTransformOriginPoint(centerPoint);
176
177 QPropertyAnimation* animation = new QPropertyAnimation(graphicsWebView(), "rotation", this);
178 animation->setDuration(1000);
179
180 int rotation = int(graphicsWebView()->rotation());
181
182 animation->setStartValue(rotation);
183 animation->setEndValue(rotation + 180 - (rotation % 180));
184
185 animation->start(QAbstractAnimation::DeleteWhenStopped);
186 #endif
187 }
188
animatedYFlip()189 void WebViewGraphicsBased::animatedYFlip()
190 {
191 #ifndef QT_NO_ANIMATION
192 if (!m_machine) {
193 m_machine = new QStateMachine(this);
194
195 QState* s0 = new QState(m_machine);
196 s0->assignProperty(this, "yRotation", 0);
197
198 QState* s1 = new QState(m_machine);
199 s1->assignProperty(this, "yRotation", 90);
200
201 QAbstractTransition* t1 = s0->addTransition(s1);
202 QPropertyAnimation* yRotationAnim = new QPropertyAnimation(this, "yRotation", this);
203 t1->addAnimation(yRotationAnim);
204
205 QState* s2 = new QState(m_machine);
206 s2->assignProperty(this, "yRotation", -90);
207 s1->addTransition(s1, SIGNAL(propertiesAssigned()), s2);
208
209 QState* s3 = new QState(m_machine);
210 s3->assignProperty(this, "yRotation", 0);
211
212 QAbstractTransition* t2 = s2->addTransition(s3);
213 t2->addAnimation(yRotationAnim);
214
215 QFinalState* final = new QFinalState(m_machine);
216 s3->addTransition(s3, SIGNAL(propertiesAssigned()), final);
217
218 m_machine->setInitialState(s0);
219 yRotationAnim->setDuration(1000);
220 }
221
222 m_machine->start();
223 #endif
224 }
225
paintEvent(QPaintEvent * event)226 void WebViewGraphicsBased::paintEvent(QPaintEvent* event)
227 {
228 QGraphicsView::paintEvent(event);
229 if (!m_measureFps)
230 return;
231 }
232
createContextMenu(QWebPage * page,QPoint position)233 static QMenu* createContextMenu(QWebPage* page, QPoint position)
234 {
235 QMenu* menu = page->createStandardContextMenu();
236
237 QWebHitTestResult r = page->mainFrame()->hitTestContent(position);
238
239 if (!r.linkUrl().isEmpty()) {
240 WebPage* webPage = qobject_cast<WebPage*>(page);
241 QAction* newTabAction = menu->addAction("Open in Default &Browser", webPage, SLOT(openUrlInDefaultBrowser()));
242 newTabAction->setData(r.linkUrl());
243 menu->insertAction(menu->actions().at(2), newTabAction);
244 }
245 return menu;
246 }
247
mousePressEvent(QGraphicsSceneMouseEvent * event)248 void GraphicsWebView::mousePressEvent(QGraphicsSceneMouseEvent* event)
249 {
250 setProperty("mouseButtons", QVariant::fromValue(int(event->buttons())));
251 setProperty("keyboardModifiers", QVariant::fromValue(int(event->modifiers())));
252
253 QGraphicsWebView::mousePressEvent(event);
254 }
255
mousePressEvent(QMouseEvent * event)256 void WebViewTraditional::mousePressEvent(QMouseEvent* event)
257 {
258 setProperty("mouseButtons", QVariant::fromValue(int(event->buttons())));
259 setProperty("keyboardModifiers", QVariant::fromValue(int(event->modifiers())));
260
261 QWebView::mousePressEvent(event);
262 }
263
contextMenuEvent(QGraphicsSceneContextMenuEvent * event)264 void GraphicsWebView::contextMenuEvent(QGraphicsSceneContextMenuEvent* event)
265 {
266 QMenu* menu = createContextMenu(page(), event->pos().toPoint());
267 menu->exec(event->screenPos());
268 delete menu;
269 }
270
contextMenuEvent(QContextMenuEvent * event)271 void WebViewTraditional::contextMenuEvent(QContextMenuEvent* event)
272 {
273 QMenu* menu = createContextMenu(page(), event->pos());
274 menu->exec(event->globalPos());
275 delete menu;
276 }
277
278