Source/WebKit/chromium/src/WebViewImpl.cpp

   1 /*
   2  * Copyright (C) 2010 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 "WebViewImpl.h"
  33
  34 #include "AutofillPopupMenuClient.h"
  35 #include "AXObjectCache.h"
  36 #include "BackForwardListChromium.h"
  37 #include "CSSStyleSelector.h"
  38 #include "CSSValueKeywords.h"
  39 #include "Chrome.h"
  40 #include "ColorSpace.h"
  41 #include "CompositionUnderlineVectorBuilder.h"
  42 #include "ContextMenu.h"
  43 #include "ContextMenuController.h"
  44 #include "ContextMenuItem.h"
  45 #include "Cursor.h"
  46 #include "DOMUtilitiesPrivate.h"
  47 #include "DeviceOrientationClientProxy.h"
  48 #include "Document.h"
  49 #include "DocumentLoader.h"
  50 #include "DragController.h"
  51 #include "DragData.h"
  52 #include "DragScrollTimer.h"
  53 #include "Editor.h"
  54 #include "EventHandler.h"
  55 #include "Extensions3D.h"
  56 #include "FocusController.h"
  57 #include "FontDescription.h"
  58 #include "FrameLoader.h"
  59 #include "FrameSelection.h"
  60 #include "FrameTree.h"
  61 #include "FrameView.h"
  62 #include "GeolocationClientProxy.h"
  63 #include "GraphicsContext.h"
  64 #include "GraphicsContext3D.h"
  65 #include "GraphicsContext3DInternal.h"
  66 #include "HTMLInputElement.h"
  67 #include "HTMLMediaElement.h"
  68 #include "HTMLNames.h"
  69 #include "HTMLTextAreaElement.h"
  70 #include "HitTestResult.h"
  71 #include "Image.h"
  72 #include "ImageBuffer.h"
  73 #include "InspectorController.h"
  74 #include "KeyboardCodes.h"
  75 #include "KeyboardEvent.h"
  76 #include "LayerPainterChromium.h"
  77 #include "MIMETypeRegistry.h"
  78 #include "NodeRenderStyle.h"
  79 #include "Page.h"
  80 #include "PageGroup.h"
  81 #include "PageGroupLoadDeferrer.h"
  82 #include "Pasteboard.h"
  83 #include "PlatformContextSkia.h"
  84 #include "PlatformKeyboardEvent.h"
  85 #include "PlatformMouseEvent.h"
  86 #include "PlatformThemeChromiumGtk.h"
  87 #include "PlatformWheelEvent.h"
  88 #include "PopupMenuChromium.h"
  89 #include "PopupMenuClient.h"
  90 #include "ProgressTracker.h"
  91 #include "RenderView.h"
  92 #include "ResourceHandle.h"
  93 #include "SecurityOrigin.h"
  94 #include "Settings.h"
  95 #include "SpeechInputClientImpl.h"
  96 #include "TextIterator.h"
  97 #include "Timer.h"
  98 #include "TraceEvent.h"
  99 #include "TypingCommand.h"
 100 #include "UserGestureIndicator.h"
 101 #include "Vector.h"
 102 #include "WebAccessibilityObject.h"
 103 #include "WebAutofillClient.h"
 104 #include "WebDevToolsAgentImpl.h"
 105 #include "WebDevToolsAgentPrivate.h"
 106 #include "WebDragData.h"
 107 #include "WebFrameImpl.h"
 108 #include "WebGraphicsContext3D.h"
 109 #include "WebImage.h"
 110 #include "WebInputElement.h"
 111 #include "WebInputEvent.h"
 112 #include "WebInputEventConversion.h"
 113 #include "WebKit.h"
 114 #include "WebKitClient.h"
 115 #include "WebMediaPlayerAction.h"
 116 #include "WebNode.h"
 117 #include "WebPlugin.h"
 118 #include "WebPluginContainerImpl.h"
 119 #include "WebPoint.h"
 120 #include "WebPopupMenuImpl.h"
 121 #include "WebRange.h"
 122 #include "WebRect.h"
 123 #include "WebRuntimeFeatures.h"
 124 #include "WebSettingsImpl.h"
 125 #include "WebString.h"
 126 #include "WebVector.h"
 127 #include "WebViewClient.h"
 128 #include "cc/CCHeadsUpDisplay.h"
 129 #include <wtf/ByteArray.h>
 130 #include <wtf/CurrentTime.h>
 131 #include <wtf/MainThread.h>
 132 #include <wtf/RefPtr.h>
 133
 134 #if ENABLE(GESTURE_EVENTS)
 135 #include "PlatformGestureEvent.h"
 136 #endif
 137
 138 #if ENABLE(GESTURE_RECOGNIZER)
 139 #include "PlatformGestureRecognizer.h"
 140 #endif
 141
 142 #if USE(CG)
 143 #include <CoreGraphics/CGBitmapContext.h>
 144 #include <CoreGraphics/CGContext.h>
 145 #endif
 146
 147 #if OS(WINDOWS)
 148 #include "RenderThemeChromiumWin.h"
 149 #else
 150 #if OS(UNIX) && !OS(DARWIN)
 151 #include "RenderThemeChromiumLinux.h"
 152 #endif
 153 #include "RenderTheme.h"
 154 #endif
 155
 156 // Get rid of WTF's pow define so we can use std::pow.
 157 #undef pow
 158 #include <cmath> // for std::pow
 159
 160 using namespace WebCore;
 161 using namespace std;
 162
 163 namespace {
 164
 165 GraphicsContext3D::Attributes getCompositorContextAttributes()
 166 {
 167     // Explicitly disable antialiasing for the compositor. As of the time of
 168     // this writing, the only platform that supported antialiasing for the
 169     // compositor was Mac OS X, because the on-screen OpenGL context creation
 170     // code paths on Windows and Linux didn't yet have multisampling support.
 171     // Mac OS X essentially always behaves as though it's rendering offscreen.
 172     // Multisampling has a heavy cost especially on devices with relatively low
 173     // fill rate like most notebooks, and the Mac implementation would need to
 174     // be optimized to resolve directly into the IOSurface shared between the
 175     // GPU and browser processes. For these reasons and to avoid platform
 176     // disparities we explicitly disable antialiasing.
 177     GraphicsContext3D::Attributes attributes;
 178     attributes.antialias = false;
 179     return attributes;
 180 }
 181
 182 } // anonymous namespace
 183
 184 namespace WebKit {
 185
 186 // Change the text zoom level by kTextSizeMultiplierRatio each time the user
 187 // zooms text in or out (ie., change by 20%).  The min and max values limit
 188 // text zoom to half and 3x the original text size.  These three values match
 189 // those in Apple's port in WebKit/WebKit/WebView/WebView.mm
 190 const double WebView::textSizeMultiplierRatio = 1.2;
 191 const double WebView::minTextSizeMultiplier = 0.5;
 192 const double WebView::maxTextSizeMultiplier = 3.0;
 193
 194
 195 // The group name identifies a namespace of pages.  Page group is used on OSX
 196 // for some programs that use HTML views to display things that don't seem like
 197 // web pages to the user (so shouldn't have visited link coloring).  We only use
 198 // one page group.
 199 const char* pageGroupName = "default";
 200
 201 // Used to defer all page activity in cases where the embedder wishes to run
 202 // a nested event loop. Using a stack enables nesting of message loop invocations.
 203 static Vector<PageGroupLoadDeferrer*> pageGroupLoadDeferrerStack;
 204
 205 // Ensure that the WebDragOperation enum values stay in sync with the original
 206 // DragOperation constants.
 207 #define COMPILE_ASSERT_MATCHING_ENUM(coreName) \
 208     COMPILE_ASSERT(int(coreName) == int(Web##coreName), dummy##coreName)
 209 COMPILE_ASSERT_MATCHING_ENUM(DragOperationNone);
 210 COMPILE_ASSERT_MATCHING_ENUM(DragOperationCopy);
 211 COMPILE_ASSERT_MATCHING_ENUM(DragOperationLink);
 212 COMPILE_ASSERT_MATCHING_ENUM(DragOperationGeneric);
 213 COMPILE_ASSERT_MATCHING_ENUM(DragOperationPrivate);
 214 COMPILE_ASSERT_MATCHING_ENUM(DragOperationMove);
 215 COMPILE_ASSERT_MATCHING_ENUM(DragOperationDelete);
 216 COMPILE_ASSERT_MATCHING_ENUM(DragOperationEvery);
 217
 218 static const PopupContainerSettings autofillPopupSettings = {
 219     false, // setTextOnIndexChange
 220     false, // acceptOnAbandon
 221     true, // loopSelectionNavigation
 222     false // restrictWidthOfListBox (For security reasons show the entire entry
 223           // so the user doesn't enter information he did not intend to.)
 224 };
 225
 226 static bool shouldUseExternalPopupMenus = false;
 227
 228 // WebView ----------------------------------------------------------------
 229
 230 WebView* WebView::create(WebViewClient* client)
 231 {
 232     // Keep runtime flag for device motion turned off until it's implemented.
 233     WebRuntimeFeatures::enableDeviceMotion(false);
 234
 235     // Pass the WebViewImpl's self-reference to the caller.
 236     return adoptRef(new WebViewImpl(client)).leakRef();
 237 }
 238
 239 void WebView::setUseExternalPopupMenus(bool useExternalPopupMenus)
 240 {
 241     shouldUseExternalPopupMenus = useExternalPopupMenus;
 242 }
 243
 244 void WebView::updateVisitedLinkState(unsigned long long linkHash)
 245 {
 246     Page::visitedStateChanged(PageGroup::pageGroup(pageGroupName), linkHash);
 247 }
 248
 249 void WebView::resetVisitedLinkState()
 250 {
 251     Page::allVisitedStateChanged(PageGroup::pageGroup(pageGroupName));
 252 }
 253
 254 void WebView::willEnterModalLoop()
 255 {
 256     PageGroup* pageGroup = PageGroup::pageGroup(pageGroupName);
 257     ASSERT(pageGroup);
 258
 259     if (pageGroup->pages().isEmpty())
 260         pageGroupLoadDeferrerStack.append(static_cast<PageGroupLoadDeferrer*>(0));
 261     else {
 262         // Pick any page in the page group since we are deferring all pages.
 263         pageGroupLoadDeferrerStack.append(new PageGroupLoadDeferrer(*pageGroup->pages().begin(), true));
 264     }
 265 }
 266
 267 void WebView::didExitModalLoop()
 268 {
 269     ASSERT(pageGroupLoadDeferrerStack.size());
 270
 271     delete pageGroupLoadDeferrerStack.last();
 272     pageGroupLoadDeferrerStack.removeLast();
 273 }
 274
 275 void WebViewImpl::initializeMainFrame(WebFrameClient* frameClient)
 276 {
 277     // NOTE: The WebFrameImpl takes a reference to itself within InitMainFrame
 278     // and releases that reference once the corresponding Frame is destroyed.
 279     RefPtr<WebFrameImpl> frame = WebFrameImpl::create(frameClient);
 280
 281     frame->initializeAsMainFrame(this);
 282
 283     // Restrict the access to the local file system
 284     // (see WebView.mm WebView::_commonInitializationWithFrameName).
 285     SecurityOrigin::setLocalLoadPolicy(SecurityOrigin::AllowLocalLoadsForLocalOnly);
 286 }
 287
 288 void WebViewImpl::setAutofillClient(WebAutofillClient* autofillClient)
 289 {
 290     m_autofillClient = autofillClient;
 291 }
 292
 293 void WebViewImpl::setDevToolsAgentClient(WebDevToolsAgentClient* devToolsClient)
 294 {
 295     if (devToolsClient)
 296         m_devToolsAgent = adoptPtr(new WebDevToolsAgentImpl(this, devToolsClient));
 297     else
 298         m_devToolsAgent.clear();
 299 }
 300
 301 void WebViewImpl::setPermissionClient(WebPermissionClient* permissionClient)
 302 {
 303     m_permissionClient = permissionClient;
 304 }
 305
 306 void WebViewImpl::setSpellCheckClient(WebSpellCheckClient* spellCheckClient)
 307 {
 308     m_spellCheckClient = spellCheckClient;
 309 }
 310
 311 WebViewImpl::WebViewImpl(WebViewClient* client)
 312     : m_client(client)
 313     , m_autofillClient(0)
 314     , m_permissionClient(0)
 315     , m_spellCheckClient(0)
 316     , m_chromeClientImpl(this)
 317     , m_contextMenuClientImpl(this)
 318     , m_dragClientImpl(this)
 319     , m_editorClientImpl(this)
 320     , m_inspectorClientImpl(this)
 321     , m_observedNewNavigation(false)
 322 #ifndef NDEBUG
 323     , m_newNavigationLoader(0)
 324 #endif
 325     , m_zoomLevel(0)
 326     , m_minimumZoomLevel(zoomFactorToZoomLevel(minTextSizeMultiplier))
 327     , m_maximumZoomLevel(zoomFactorToZoomLevel(maxTextSizeMultiplier))
 328     , m_contextMenuAllowed(false)
 329     , m_doingDragAndDrop(false)
 330     , m_ignoreInputEvents(false)
 331     , m_suppressNextKeypressEvent(false)
 332     , m_initialNavigationPolicy(WebNavigationPolicyIgnore)
 333     , m_imeAcceptEvents(true)
 334     , m_operationsAllowed(WebDragOperationNone)
 335     , m_dragOperation(WebDragOperationNone)
 336     , m_autofillPopupShowing(false)
 337     , m_autofillPopup(0)
 338     , m_isTransparent(false)
 339     , m_tabsToLinks(false)
 340     , m_dragScrollTimer(adoptPtr(new DragScrollTimer))
 341 #if USE(ACCELERATED_COMPOSITING)
 342     , m_rootGraphicsLayer(0)
 343     , m_isAcceleratedCompositingActive(false)
 344     , m_compositorCreationFailed(false)
 345     , m_recreatingGraphicsContext(false)
 346 #endif
 347 #if ENABLE(INPUT_SPEECH)
 348     , m_speechInputClient(SpeechInputClientImpl::create(client))
 349 #endif
 350     , m_deviceOrientationClientProxy(adoptPtr(new DeviceOrientationClientProxy(client ? client->deviceOrientationClient() : 0)))
 351     , m_geolocationClientProxy(adoptPtr(new GeolocationClientProxy(client ? client->geolocationClient() : 0)))
 352 #if ENABLE(GESTURE_RECOGNIZER)
 353     , m_gestureRecognizer(WebCore::PlatformGestureRecognizer::create())
 354 #endif
 355 {
 356     // WebKit/win/WebView.cpp does the same thing, except they call the
 357     // KJS specific wrapper around this method. We need to have threading
 358     // initialized because CollatorICU requires it.
 359     WTF::initializeThreading();
 360     WTF::initializeMainThread();
 361
 362     // set to impossible point so we always get the first mouse pos
 363     m_lastMousePosition = WebPoint(-1, -1);
 364
 365     Page::PageClients pageClients;
 366     pageClients.chromeClient = &m_chromeClientImpl;
 367     pageClients.contextMenuClient = &m_contextMenuClientImpl;
 368     pageClients.editorClient = &m_editorClientImpl;
 369     pageClients.dragClient = &m_dragClientImpl;
 370     pageClients.inspectorClient = &m_inspectorClientImpl;
 371 #if ENABLE(INPUT_SPEECH)
 372     pageClients.speechInputClient = m_speechInputClient.get();
 373 #endif
 374     pageClients.deviceOrientationClient = m_deviceOrientationClientProxy.get();
 375     pageClients.geolocationClient = m_geolocationClientProxy.get();
 376     pageClients.backForwardClient = BackForwardListChromium::create(this);
 377
 378     m_page = adoptPtr(new Page(pageClients));
 379
 380     m_geolocationClientProxy->setController(m_page->geolocationController());
 381
 382     m_page->setGroupName(pageGroupName);
 383
 384 #if ENABLE(PAGE_VISIBILITY_API)
 385     if (m_client)
 386         setVisibilityState(m_client->visibilityState(), true);
 387 #endif
 388
 389     m_inspectorSettingsMap = adoptPtr(new SettingsMap);
 390 }
 391
 392 WebViewImpl::~WebViewImpl()
 393 {
 394     ASSERT(!m_page);
 395 }
 396
 397 RenderTheme* WebViewImpl::theme() const
 398 {
 399     return m_page.get() ? m_page->theme() : RenderTheme::defaultTheme().get();
 400 }
 401
 402 WebFrameImpl* WebViewImpl::mainFrameImpl()
 403 {
 404     return m_page.get() ? WebFrameImpl::fromFrame(m_page->mainFrame()) : 0;
 405 }
 406
 407 bool WebViewImpl::tabKeyCyclesThroughElements() const
 408 {
 409     ASSERT(m_page.get());
 410     return m_page->tabKeyCyclesThroughElements();
 411 }
 412
 413 void WebViewImpl::setTabKeyCyclesThroughElements(bool value)
 414 {
 415     if (m_page)
 416         m_page->setTabKeyCyclesThroughElements(value);
 417 }
 418
 419 void WebViewImpl::mouseMove(const WebMouseEvent& event)
 420 {
 421     if (!mainFrameImpl() || !mainFrameImpl()->frameView())
 422         return;
 423
 424     m_lastMousePosition = WebPoint(event.x, event.y);
 425
 426     // We call mouseMoved here instead of handleMouseMovedEvent because we need
 427     // our ChromeClientImpl to receive changes to the mouse position and
 428     // tooltip text, and mouseMoved handles all of that.
 429     mainFrameImpl()->frame()->eventHandler()->mouseMoved(
 430         PlatformMouseEventBuilder(mainFrameImpl()->frameView(), event));
 431 }
 432
 433 void WebViewImpl::mouseLeave(const WebMouseEvent& event)
 434 {
 435     // This event gets sent as the main frame is closing.  In that case, just
 436     // ignore it.
 437     if (!mainFrameImpl() || !mainFrameImpl()->frameView())
 438         return;
 439
 440     m_client->setMouseOverURL(WebURL());
 441
 442     mainFrameImpl()->frame()->eventHandler()->handleMouseMoveEvent(
 443         PlatformMouseEventBuilder(mainFrameImpl()->frameView(), event));
 444 }
 445
 446 void WebViewImpl::mouseDown(const WebMouseEvent& event)
 447 {
 448     if (!mainFrameImpl() || !mainFrameImpl()->frameView())
 449         return;
 450
 451     // If there is a select popup open, close it as the user is clicking on
 452     // the page (outside of the popup).  We also save it so we can prevent a
 453     // click on the select element from immediately reopening the popup.
 454     RefPtr<WebCore::PopupContainer> selectPopup;
 455     if (event.button == WebMouseEvent::ButtonLeft) {
 456         selectPopup = m_selectPopup;
 457         hideSelectPopup();
 458         ASSERT(!m_selectPopup);
 459     }
 460
 461     m_lastMouseDownPoint = WebPoint(event.x, event.y);
 462
 463     RefPtr<Node> clickedNode;
 464     if (event.button == WebMouseEvent::ButtonLeft) {
 465         IntPoint point(event.x, event.y);
 466         point = m_page->mainFrame()->view()->windowToContents(point);
 467         HitTestResult result(m_page->mainFrame()->eventHandler()->hitTestResultAtPoint(point, false));
 468         Node* hitNode = result.innerNonSharedNode();
 469
 470         // Take capture on a mouse down on a plugin so we can send it mouse events.
 471         if (hitNode && hitNode->renderer() && hitNode->renderer()->isEmbeddedObject())
 472             m_mouseCaptureNode = hitNode;
 473
 474         // If a text field that has focus is clicked again, we should display the
 475         // Autofill popup.
 476         RefPtr<Node> focusedNode = focusedWebCoreNode();
 477         if (focusedNode.get() && toHTMLInputElement(focusedNode.get())) {
 478             if (hitNode == focusedNode) {
 479                 // Already focused text field was clicked, let's remember this.  If
 480                 // focus has not changed after the mouse event is processed, we'll
 481                 // trigger the autocomplete.
 482                 clickedNode = focusedNode;
 483             }
 484         }
 485     }
 486
 487     mainFrameImpl()->frame()->loader()->resetMultipleFormSubmissionProtection();
 488
 489     mainFrameImpl()->frame()->eventHandler()->handleMousePressEvent(
 490         PlatformMouseEventBuilder(mainFrameImpl()->frameView(), event));
 491
 492     if (clickedNode.get() && clickedNode == focusedWebCoreNode()) {
 493         // Focus has not changed, show the Autofill popup.
 494         static_cast<EditorClientImpl*>(m_page->editorClient())->
 495             showFormAutofillForNode(clickedNode.get());
 496     }
 497     if (m_selectPopup && m_selectPopup == selectPopup) {
 498         // That click triggered a select popup which is the same as the one that
 499         // was showing before the click.  It means the user clicked the select
 500         // while the popup was showing, and as a result we first closed then
 501         // immediately reopened the select popup.  It needs to be closed.
 502         hideSelectPopup();
 503     }
 504
 505     // Dispatch the contextmenu event regardless of if the click was swallowed.
 506     // On Windows, we handle it on mouse up, not down.
 507 #if OS(DARWIN)
 508     if (event.button == WebMouseEvent::ButtonRight
 509         || (event.button == WebMouseEvent::ButtonLeft
 510             && event.modifiers & WebMouseEvent::ControlKey))
 511         mouseContextMenu(event);
 512 #elif OS(UNIX)
 513     if (event.button == WebMouseEvent::ButtonRight)
 514         mouseContextMenu(event);
 515 #endif
 516 }
 517
 518 void WebViewImpl::mouseContextMenu(const WebMouseEvent& event)
 519 {
 520     if (!mainFrameImpl() || !mainFrameImpl()->frameView())
 521         return;
 522
 523     m_page->contextMenuController()->clearContextMenu();
 524
 525     PlatformMouseEventBuilder pme(mainFrameImpl()->frameView(), event);
 526
 527     // Find the right target frame. See issue 1186900.
 528     HitTestResult result = hitTestResultForWindowPos(pme.pos());
 529     Frame* targetFrame;
 530     if (result.innerNonSharedNode())
 531         targetFrame = result.innerNonSharedNode()->document()->frame();
 532     else
 533         targetFrame = m_page->focusController()->focusedOrMainFrame();
 534
 535 #if OS(WINDOWS)
 536     targetFrame->view()->setCursor(pointerCursor());
 537 #endif
 538
 539     m_contextMenuAllowed = true;
 540     targetFrame->eventHandler()->sendContextMenuEvent(pme);
 541     m_contextMenuAllowed = false;
 542     // Actually showing the context menu is handled by the ContextMenuClient
 543     // implementation...
 544 }
 545
 546 void WebViewImpl::mouseUp(const WebMouseEvent& event)
 547 {
 548     if (!mainFrameImpl() || !mainFrameImpl()->frameView())
 549         return;
 550
 551 #if OS(UNIX) && !OS(DARWIN)
 552     // If the event was a middle click, attempt to copy text into the focused
 553     // frame. We execute this before we let the page have a go at the event
 554     // because the page may change what is focused during in its event handler.
 555     //
 556     // This code is in the mouse up handler. There is some debate about putting
 557     // this here, as opposed to the mouse down handler.
 558     //   xterm: pastes on up.
 559     //   GTK: pastes on down.
 560     //   Firefox: pastes on up.
 561     //   Midori: couldn't paste at all with 0.1.2
 562     //
 563     // There is something of a webcompat angle to this well, as highlighted by
 564     // crbug.com/14608. Pages can clear text boxes 'onclick' and, if we paste on
 565     // down then the text is pasted just before the onclick handler runs and
 566     // clears the text box. So it's important this happens after the
 567     // handleMouseReleaseEvent() earlier in this function
 568     if (event.button == WebMouseEvent::ButtonMiddle) {
 569         Frame* focused = focusedWebCoreFrame();
 570         FrameView* view = m_page->mainFrame()->view();
 571         IntPoint clickPoint(m_lastMouseDownPoint.x, m_lastMouseDownPoint.y);
 572         IntPoint contentPoint = view->windowToContents(clickPoint);
 573         HitTestResult hitTestResult = focused->eventHandler()->hitTestResultAtPoint(contentPoint, false, false, ShouldHitTestScrollbars);
 574         // We don't want to send a paste when middle clicking a scroll bar or a
 575         // link (which will navigate later in the code).  The main scrollbars
 576         // have to be handled separately.
 577         if (!hitTestResult.scrollbar() && !hitTestResult.isLiveLink() && focused && !view->scrollbarAtPoint(clickPoint)) {
 578             Editor* editor = focused->editor();
 579             Pasteboard* pasteboard = Pasteboard::generalPasteboard();
 580             bool oldSelectionMode = pasteboard->isSelectionMode();
 581             pasteboard->setSelectionMode(true);
 582             editor->command(AtomicString("Paste")).execute();
 583             pasteboard->setSelectionMode(oldSelectionMode);
 584         }
 585     }
 586 #endif
 587
 588     mainFrameImpl()->frame()->eventHandler()->handleMouseReleaseEvent(
 589         PlatformMouseEventBuilder(mainFrameImpl()->frameView(), event));
 590
 591 #if OS(WINDOWS)
 592     // Dispatch the contextmenu event regardless of if the click was swallowed.
 593     // On Mac/Linux, we handle it on mouse down, not up.
 594     if (event.button == WebMouseEvent::ButtonRight)
 595         mouseContextMenu(event);
 596 #endif
 597 }
 598
 599 bool WebViewImpl::mouseWheel(const WebMouseWheelEvent& event)
 600 {
 601     PlatformWheelEventBuilder platformEvent(mainFrameImpl()->frameView(), event);
 602     return mainFrameImpl()->frame()->eventHandler()->handleWheelEvent(platformEvent);
 603 }
 604
 605 #if ENABLE(GESTURE_EVENTS)
 606 bool WebViewImpl::gestureEvent(const WebGestureEvent& event)
 607 {
 608     PlatformGestureEventBuilder platformEvent(mainFrameImpl()->frameView(), event);
 609     return mainFrameImpl()->frame()->eventHandler()->handleGestureEvent(platformEvent);
 610 }
 611 #endif
 612
 613 bool WebViewImpl::keyEvent(const WebKeyboardEvent& event)
 614 {
 615     ASSERT((event.type == WebInputEvent::RawKeyDown)
 616         || (event.type == WebInputEvent::KeyDown)
 617         || (event.type == WebInputEvent::KeyUp));
 618
 619     // Please refer to the comments explaining the m_suppressNextKeypressEvent
 620     // member.
 621     // The m_suppressNextKeypressEvent is set if the KeyDown is handled by
 622     // Webkit. A keyDown event is typically associated with a keyPress(char)
 623     // event and a keyUp event. We reset this flag here as this is a new keyDown
 624     // event.
 625     m_suppressNextKeypressEvent = false;
 626
 627     // If there is a select popup, it should be the one processing the event,
 628     // not the page.
 629     if (m_selectPopup)
 630         return m_selectPopup->handleKeyEvent(PlatformKeyboardEventBuilder(event));
 631
 632     // Give Autocomplete a chance to consume the key events it is interested in.
 633     if (autocompleteHandleKeyEvent(event))
 634         return true;
 635
 636     Frame* frame = focusedWebCoreFrame();
 637     if (!frame)
 638         return false;
 639
 640     EventHandler* handler = frame->eventHandler();
 641     if (!handler)
 642         return keyEventDefault(event);
 643
 644 #if !OS(DARWIN)
 645     const WebInputEvent::Type contextMenuTriggeringEventType =
 646 #if OS(WINDOWS)
 647         WebInputEvent::KeyUp;
 648 #elif OS(UNIX)
 649         WebInputEvent::RawKeyDown;
 650 #endif
 651
 652     bool isUnmodifiedMenuKey = !(event.modifiers & WebInputEvent::InputModifiers) && event.windowsKeyCode == VKEY_APPS;
 653     bool isShiftF10 = event.modifiers == WebInputEvent::ShiftKey && event.windowsKeyCode == VKEY_F10;
 654     if ((isUnmodifiedMenuKey || isShiftF10) && event.type == contextMenuTriggeringEventType) {
 655         sendContextMenuEvent(event);
 656         return true;
 657     }
 658 #endif // !OS(DARWIN)
 659
 660     PlatformKeyboardEventBuilder evt(event);
 661
 662     if (handler->keyEvent(evt)) {
 663         if (WebInputEvent::RawKeyDown == event.type) {
 664             // Suppress the next keypress event unless the focused node is a plug-in node.
 665             // (Flash needs these keypress events to handle non-US keyboards.)
 666             Node* node = frame->document()->focusedNode();
 667             if (!node || !node->renderer() || !node->renderer()->isEmbeddedObject())
 668                 m_suppressNextKeypressEvent = true;
 669         }
 670         return true;
 671     }
 672
 673     return keyEventDefault(event);
 674 }
 675
 676 bool WebViewImpl::autocompleteHandleKeyEvent(const WebKeyboardEvent& event)
 677 {
 678     if (!m_autofillPopupShowing
 679         // Home and End should be left to the text field to process.
 680         || event.windowsKeyCode == VKEY_HOME
 681         || event.windowsKeyCode == VKEY_END)
 682       return false;
 683
 684     // Pressing delete triggers the removal of the selected suggestion from the DB.
 685     if (event.windowsKeyCode == VKEY_DELETE
 686         && m_autofillPopup->selectedIndex() != -1) {
 687         Node* node = focusedWebCoreNode();
 688         if (!node || (node->nodeType() != Node::ELEMENT_NODE)) {
 689             ASSERT_NOT_REACHED();
 690             return false;
 691         }
 692         Element* element = static_cast<Element*>(node);
 693         if (!element->hasLocalName(HTMLNames::inputTag)) {
 694             ASSERT_NOT_REACHED();
 695             return false;
 696         }
 697
 698         int selectedIndex = m_autofillPopup->selectedIndex();
 699
 700         if (!m_autofillPopupClient->canRemoveSuggestionAtIndex(selectedIndex))
 701             return false;
 702
 703         WebString name = WebInputElement(static_cast<HTMLInputElement*>(element)).nameForAutofill();
 704         WebString value = m_autofillPopupClient->itemText(selectedIndex);
 705         m_autofillClient->removeAutocompleteSuggestion(name, value);
 706         // Update the entries in the currently showing popup to reflect the
 707         // deletion.
 708         m_autofillPopupClient->removeSuggestionAtIndex(selectedIndex);
 709         refreshAutofillPopup();
 710         return false;
 711     }
 712
 713     if (!m_autofillPopup->isInterestedInEventForKey(event.windowsKeyCode))
 714         return false;
 715
 716     if (m_autofillPopup->handleKeyEvent(PlatformKeyboardEventBuilder(event))) {
 717         // We need to ignore the next Char event after this otherwise pressing
 718         // enter when selecting an item in the menu will go to the page.
 719         if (WebInputEvent::RawKeyDown == event.type)
 720             m_suppressNextKeypressEvent = true;
 721         return true;
 722     }
 723
 724     return false;
 725 }
 726
 727 bool WebViewImpl::charEvent(const WebKeyboardEvent& event)
 728 {
 729     ASSERT(event.type == WebInputEvent::Char);
 730
 731     // Please refer to the comments explaining the m_suppressNextKeypressEvent
 732     // member.  The m_suppressNextKeypressEvent is set if the KeyDown is
 733     // handled by Webkit. A keyDown event is typically associated with a
 734     // keyPress(char) event and a keyUp event. We reset this flag here as it
 735     // only applies to the current keyPress event.
 736     bool suppress = m_suppressNextKeypressEvent;
 737     m_suppressNextKeypressEvent = false;
 738
 739     // If there is a select popup, it should be the one processing the event,
 740     // not the page.
 741     if (m_selectPopup)
 742         return m_selectPopup->handleKeyEvent(PlatformKeyboardEventBuilder(event));
 743
 744     Frame* frame = focusedWebCoreFrame();
 745     if (!frame)
 746         return suppress;
 747
 748     EventHandler* handler = frame->eventHandler();
 749     if (!handler)
 750         return suppress || keyEventDefault(event);
 751
 752     PlatformKeyboardEventBuilder evt(event);
 753     if (!evt.isCharacterKey())
 754         return true;
 755
 756     // Accesskeys are triggered by char events and can't be suppressed.
 757     if (handler->handleAccessKey(evt))
 758         return true;
 759
 760     // Safari 3.1 does not pass off windows system key messages (WM_SYSCHAR) to
 761     // the eventHandler::keyEvent. We mimic this behavior on all platforms since
 762     // for now we are converting other platform's key events to windows key
 763     // events.
 764     if (evt.isSystemKey())
 765         return false;
 766
 767     if (!suppress && !handler->keyEvent(evt))
 768         return keyEventDefault(event);
 769
 770     return true;
 771 }
 772
 773 #if ENABLE(TOUCH_EVENTS)
 774 bool WebViewImpl::touchEvent(const WebTouchEvent& event)
 775 {
 776     if (!mainFrameImpl() || !mainFrameImpl()->frameView())
 777         return false;
 778
 779     PlatformTouchEventBuilder touchEventBuilder(mainFrameImpl()->frameView(), event);
 780     bool defaultPrevented = mainFrameImpl()->frame()->eventHandler()->handleTouchEvent(touchEventBuilder);
 781
 782 #if ENABLE(GESTURE_RECOGNIZER)
 783     OwnPtr<Vector<WebCore::PlatformGestureEvent> > gestureEvents(m_gestureRecognizer->processTouchEventForGestures(touchEventBuilder, defaultPrevented));
 784     for (unsigned int  i = 0; i < gestureEvents->size(); i++)
 785         mainFrameImpl()->frame()->eventHandler()->handleGestureEvent(gestureEvents->at(i));
 786 #endif
 787
 788     return defaultPrevented;
 789 }
 790 #endif
 791
 792 #if !OS(DARWIN)
 793 // Mac has no way to open a context menu based on a keyboard event.
 794 bool WebViewImpl::sendContextMenuEvent(const WebKeyboardEvent& event)
 795 {
 796     // The contextMenuController() holds onto the last context menu that was
 797     // popped up on the page until a new one is created. We need to clear
 798     // this menu before propagating the event through the DOM so that we can
 799     // detect if we create a new menu for this event, since we won't create
 800     // a new menu if the DOM swallows the event and the defaultEventHandler does
 801     // not run.
 802     page()->contextMenuController()->clearContextMenu();
 803
 804     m_contextMenuAllowed = true;
 805     Frame* focusedFrame = page()->focusController()->focusedOrMainFrame();
 806     bool handled = focusedFrame->eventHandler()->sendContextMenuEventForKey();
 807     m_contextMenuAllowed = false;
 808     return handled;
 809 }
 810 #endif
 811
 812 bool WebViewImpl::keyEventDefault(const WebKeyboardEvent& event)
 813 {
 814     Frame* frame = focusedWebCoreFrame();
 815     if (!frame)
 816         return false;
 817
 818     switch (event.type) {
 819     case WebInputEvent::Char:
 820         if (event.windowsKeyCode == VKEY_SPACE) {
 821             int keyCode = ((event.modifiers & WebInputEvent::ShiftKey) ? VKEY_PRIOR : VKEY_NEXT);
 822             return scrollViewWithKeyboard(keyCode, event.modifiers);
 823         }
 824         break;
 825     case WebInputEvent::RawKeyDown:
 826         if (event.modifiers == WebInputEvent::ControlKey) {
 827             switch (event.windowsKeyCode) {
 828 #if !OS(DARWIN)
 829             case 'A':
 830                 focusedFrame()->executeCommand(WebString::fromUTF8("SelectAll"));
 831                 return true;
 832             case VKEY_INSERT:
 833             case 'C':
 834                 focusedFrame()->executeCommand(WebString::fromUTF8("Copy"));
 835                 return true;
 836 #endif
 837             // Match FF behavior in the sense that Ctrl+home/end are the only Ctrl
 838             // key combinations which affect scrolling. Safari is buggy in the
 839             // sense that it scrolls the page for all Ctrl+scrolling key
 840             // combinations. For e.g. Ctrl+pgup/pgdn/up/down, etc.
 841             case VKEY_HOME:
 842             case VKEY_END:
 843                 break;
 844             default:
 845                 return false;
 846             }
 847         }
 848         if (!event.isSystemKey && !(event.modifiers & WebInputEvent::ShiftKey))
 849             return scrollViewWithKeyboard(event.windowsKeyCode, event.modifiers);
 850         break;
 851     default:
 852         break;
 853     }
 854     return false;
 855 }
 856
 857 bool WebViewImpl::scrollViewWithKeyboard(int keyCode, int modifiers)
 858 {
 859     ScrollDirection scrollDirection;
 860     ScrollGranularity scrollGranularity;
 861 #if OS(DARWIN)
 862     // Control-Up/Down should be PageUp/Down on Mac.
 863     if (modifiers & WebMouseEvent::ControlKey) {
 864       if (keyCode == VKEY_UP)
 865         keyCode = VKEY_PRIOR;
 866       else if (keyCode == VKEY_DOWN)
 867         keyCode = VKEY_NEXT;
 868     }
 869 #endif
 870     if (!mapKeyCodeForScroll(keyCode, &scrollDirection, &scrollGranularity))
 871         return false;
 872     return propagateScroll(scrollDirection, scrollGranularity);
 873 }
 874
 875 bool WebViewImpl::mapKeyCodeForScroll(int keyCode,
 876                                       WebCore::ScrollDirection* scrollDirection,
 877                                       WebCore::ScrollGranularity* scrollGranularity)
 878 {
 879     switch (keyCode) {
 880     case VKEY_LEFT:
 881         *scrollDirection = ScrollLeft;
 882         *scrollGranularity = ScrollByLine;
 883         break;
 884     case VKEY_RIGHT:
 885         *scrollDirection = ScrollRight;
 886         *scrollGranularity = ScrollByLine;
 887         break;
 888     case VKEY_UP:
 889         *scrollDirection = ScrollUp;
 890         *scrollGranularity = ScrollByLine;
 891         break;
 892     case VKEY_DOWN:
 893         *scrollDirection = ScrollDown;
 894         *scrollGranularity = ScrollByLine;
 895         break;
 896     case VKEY_HOME:
 897         *scrollDirection = ScrollUp;
 898         *scrollGranularity = ScrollByDocument;
 899         break;
 900     case VKEY_END:
 901         *scrollDirection = ScrollDown;
 902         *scrollGranularity = ScrollByDocument;
 903         break;
 904     case VKEY_PRIOR:  // page up
 905         *scrollDirection = ScrollUp;
 906         *scrollGranularity = ScrollByPage;
 907         break;
 908     case VKEY_NEXT:  // page down
 909         *scrollDirection = ScrollDown;
 910         *scrollGranularity = ScrollByPage;
 911         break;
 912     default:
 913         return false;
 914     }
 915
 916     return true;
 917 }
 918
 919 void WebViewImpl::hideSelectPopup()
 920 {
 921     if (m_selectPopup.get())
 922         m_selectPopup->hidePopup();
 923 }
 924
 925 bool WebViewImpl::propagateScroll(ScrollDirection scrollDirection,
 926                                   ScrollGranularity scrollGranularity)
 927 {
 928     Frame* frame = focusedWebCoreFrame();
 929     if (!frame)
 930         return false;
 931
 932     bool scrollHandled = frame->eventHandler()->scrollOverflow(scrollDirection, scrollGranularity);
 933     Frame* currentFrame = frame;
 934     while (!scrollHandled && currentFrame) {
 935         scrollHandled = currentFrame->view()->scroll(scrollDirection, scrollGranularity);
 936         currentFrame = currentFrame->tree()->parent();
 937     }
 938     return scrollHandled;
 939 }
 940
 941 void  WebViewImpl::popupOpened(WebCore::PopupContainer* popupContainer)
 942 {
 943     if (popupContainer->popupType() == WebCore::PopupContainer::Select) {
 944         ASSERT(!m_selectPopup);
 945         m_selectPopup = popupContainer;
 946     }
 947 }
 948
 949 void  WebViewImpl::popupClosed(WebCore::PopupContainer* popupContainer)
 950 {
 951     if (popupContainer->popupType() == WebCore::PopupContainer::Select) {
 952         ASSERT(m_selectPopup.get());
 953         m_selectPopup = 0;
 954     }
 955 }
 956
 957 void WebViewImpl::hideAutofillPopup()
 958 {
 959     if (m_autofillPopupShowing) {
 960         m_autofillPopup->hidePopup();
 961         m_autofillPopupShowing = false;
 962     }
 963 }
 964
 965 Frame* WebViewImpl::focusedWebCoreFrame() const
 966 {
 967     return m_page.get() ? m_page->focusController()->focusedOrMainFrame() : 0;
 968 }
 969
 970 WebViewImpl* WebViewImpl::fromPage(Page* page)
 971 {
 972     if (!page)
 973         return 0;
 974
 975     ChromeClientImpl* chromeClient = static_cast<ChromeClientImpl*>(page->chrome()->client());
 976     return static_cast<WebViewImpl*>(chromeClient->webView());
 977 }
 978
 979 // WebWidget ------------------------------------------------------------------
 980
 981 void WebViewImpl::close()
 982 {
 983     RefPtr<WebFrameImpl> mainFrameImpl;
 984
 985     if (m_page.get()) {
 986         // Initiate shutdown for the entire frameset.  This will cause a lot of
 987         // notifications to be sent.
 988         if (m_page->mainFrame()) {
 989             mainFrameImpl = WebFrameImpl::fromFrame(m_page->mainFrame());
 990             m_page->mainFrame()->loader()->frameDetached();
 991         }
 992         m_page.clear();
 993     }
 994
 995     // Should happen after m_page.clear().
 996     if (m_devToolsAgent.get())
 997         m_devToolsAgent.clear();
 998
 999     // Reset the delegate to prevent notifications being sent as we're being
1000     // deleted.
1001     m_client = 0;
1002
1003     deref();  // Balances ref() acquired in WebView::create
1004 }
1005
1006 void WebViewImpl::willStartLiveResize()
1007 {
1008     if (mainFrameImpl() && mainFrameImpl()->frameView())
1009         mainFrameImpl()->frameView()->willStartLiveResize();
1010
1011     Frame* frame = mainFrameImpl()->frame();
1012     WebPluginContainerImpl* pluginContainer = WebFrameImpl::pluginContainerFromFrame(frame);
1013     if (pluginContainer)
1014         pluginContainer->willStartLiveResize();
1015 }
1016
1017 void WebViewImpl::resize(const WebSize& newSize)
1018 {
1019     if (m_size == newSize)
1020         return;
1021     m_size = newSize;
1022
1023     if (mainFrameImpl()->frameView()) {
1024         mainFrameImpl()->frameView()->resize(m_size.width, m_size.height);
1025         mainFrameImpl()->frame()->eventHandler()->sendResizeEvent();
1026     }
1027
1028     if (m_client) {
1029         if (isAcceleratedCompositingActive()) {
1030 #if USE(ACCELERATED_COMPOSITING)
1031             updateLayerTreeViewport();
1032 #endif
1033         } else {
1034             WebRect damagedRect(0, 0, m_size.width, m_size.height);
1035             m_client->didInvalidateRect(damagedRect);
1036         }
1037     }
1038 }
1039
1040 void WebViewImpl::willEndLiveResize()
1041 {
1042     if (mainFrameImpl() && mainFrameImpl()->frameView())
1043         mainFrameImpl()->frameView()->willEndLiveResize();
1044
1045     Frame* frame = mainFrameImpl()->frame();
1046     WebPluginContainerImpl* pluginContainer = WebFrameImpl::pluginContainerFromFrame(frame);
1047     if (pluginContainer)
1048         pluginContainer->willEndLiveResize();
1049 }
1050
1051 void WebViewImpl::animate(double frameBeginTime)
1052 {
1053 #if ENABLE(REQUEST_ANIMATION_FRAME)
1054     TRACE_EVENT("WebViewImpl::animate", this, 0);
1055     // FIXME: remove this zero-check once render_widget has been modified to
1056     // pass in a frameBeginTime.
1057     if (!frameBeginTime)
1058         frameBeginTime = currentTime();
1059     WebFrameImpl* webframe = mainFrameImpl();
1060     if (webframe) {
1061         FrameView* view = webframe->frameView();
1062         if (view) {
1063 #if !USE(THREADED_COMPOSITING)
1064             if (m_layerTreeHost)
1065                 m_layerTreeHost->setAnimating(true);
1066 #endif
1067             view->serviceScriptedAnimations(convertSecondsToDOMTimeStamp(frameBeginTime));
1068 #if !USE(THREADED_COMPOSITING)
1069             if (m_layerTreeHost)
1070                 m_layerTreeHost->setAnimating(false);
1071 #endif
1072         }
1073     }
1074 #endif
1075 }
1076
1077 void WebViewImpl::layout()
1078 {
1079     TRACE_EVENT("WebViewImpl::layout", this, 0);
1080
1081     WebFrameImpl* webframe = mainFrameImpl();
1082     if (webframe) {
1083         // In order for our child HWNDs (NativeWindowWidgets) to update properly,
1084         // they need to be told that we are updating the screen.  The problem is
1085         // that the native widgets need to recalculate their clip region and not
1086         // overlap any of our non-native widgets.  To force the resizing, call
1087         // setFrameRect().  This will be a quick operation for most frames, but
1088         // the NativeWindowWidgets will update a proper clipping region.
1089         FrameView* view = webframe->frameView();
1090         if (view)
1091             view->setFrameRect(view->frameRect());
1092
1093         // setFrameRect may have the side-effect of causing existing page
1094         // layout to be invalidated, so layout needs to be called last.
1095
1096         webframe->layout();
1097     }
1098 }
1099
1100 #if USE(ACCELERATED_COMPOSITING)
1101 void WebViewImpl::doPixelReadbackToCanvas(WebCanvas* canvas, const IntRect& rect)
1102 {
1103 #if USE(SKIA)
1104     PlatformContextSkia context(canvas);
1105
1106     // PlatformGraphicsContext is actually a pointer to PlatformContextSkia
1107     GraphicsContext gc(reinterpret_cast<PlatformGraphicsContext*>(&context));
1108     int bitmapHeight = canvas->getDevice()->accessBitmap(false).height();
1109 #elif USE(CG)
1110     GraphicsContext gc(canvas);
1111     int bitmapHeight = CGBitmapContextGetHeight(reinterpret_cast<CGContextRef>(canvas));
1112 #else
1113     notImplemented();
1114 #endif
1115     // Compute rect to sample from inverted GPU buffer.
1116     IntRect invertRect(rect.x(), bitmapHeight - rect.maxY(), rect.width(), rect.height());
1117
1118     OwnPtr<ImageBuffer> imageBuffer(ImageBuffer::create(rect.size()));
1119     RefPtr<ByteArray> pixelArray(ByteArray::create(rect.width() * rect.height() * 4));
1120     if (imageBuffer.get() && pixelArray.get()) {
1121         m_layerTreeHost->compositeAndReadback(pixelArray->data(), invertRect);
1122         imageBuffer->putPremultipliedImageData(pixelArray.get(), rect.size(), IntRect(IntPoint(), rect.size()), IntPoint());
1123         gc.save();
1124         gc.translate(IntSize(0, bitmapHeight));
1125         gc.scale(FloatSize(1.0f, -1.0f));
1126         // Use invertRect in next line, so that transform above inverts it back to
1127         // desired destination rect.
1128         gc.drawImageBuffer(imageBuffer.get(), ColorSpaceDeviceRGB, invertRect.location());
1129         gc.restore();
1130     }
1131 }
1132 #endif
1133
1134 void WebViewImpl::paint(WebCanvas* canvas, const WebRect& rect)
1135 {
1136     if (isAcceleratedCompositingActive()) {
1137 #if USE(ACCELERATED_COMPOSITING)
1138         // If a canvas was passed in, we use it to grab a copy of the
1139         // freshly-rendered pixels.
1140         if (canvas) {
1141             // Clip rect to the confines of the rootLayerTexture.
1142             IntRect resizeRect(rect);
1143             resizeRect.intersect(IntRect(IntPoint(0, 0), m_layerTreeHost->viewportVisibleRect().size()));
1144             doPixelReadbackToCanvas(canvas, resizeRect);
1145         }
1146 #endif
1147     } else {
1148         double paintStart = currentTime();
1149         WebFrameImpl* webframe = mainFrameImpl();
1150         if (webframe)
1151             webframe->paint(canvas, rect);
1152         double paintEnd = currentTime();
1153         double pixelsPerSec = (rect.width * rect.height) / (paintEnd - paintStart);
1154         PlatformBridge::histogramCustomCounts("Renderer4.SoftwarePaintDurationMS", (paintEnd - paintStart) * 1000, 0, 120, 30);
1155         PlatformBridge::histogramCustomCounts("Renderer4.SoftwarePaintMegapixPerSecond", pixelsPerSec / 1000000, 10, 210, 30);
1156     }
1157 }
1158
1159 void WebViewImpl::themeChanged()
1160 {
1161     if (!page())
1162         return;
1163     FrameView* view = page()->mainFrame()->view();
1164
1165     WebRect damagedRect(0, 0, m_size.width, m_size.height);
1166     view->invalidateRect(damagedRect);
1167 }
1168
1169 void WebViewImpl::composite(bool finish)
1170 {
1171 #if USE(ACCELERATED_COMPOSITING)
1172 #if USE(THREADED_COMPOSITING)
1173     m_layerTreeHost->setNeedsRedraw();
1174 #else
1175     ASSERT(isAcceleratedCompositingActive());
1176     if (!page())
1177         return;
1178
1179     if (m_pageOverlay)
1180         m_pageOverlay->update();
1181
1182     m_layerTreeHost->composite(finish);
1183 #endif
1184 #endif
1185 }
1186
1187 const WebInputEvent* WebViewImpl::m_currentInputEvent = 0;
1188
1189 bool WebViewImpl::handleInputEvent(const WebInputEvent& inputEvent)
1190 {
1191     UserGestureIndicator gestureIndicator(WebInputEvent::isUserGestureEventType(inputEvent.type) ? DefinitelyProcessingUserGesture : PossiblyProcessingUserGesture);
1192
1193     // If we've started a drag and drop operation, ignore input events until
1194     // we're done.
1195     if (m_doingDragAndDrop)
1196         return true;
1197
1198     if (m_ignoreInputEvents)
1199         return true;
1200
1201     m_currentInputEvent = &inputEvent;
1202
1203     if (m_mouseCaptureNode.get() && WebInputEvent::isMouseEventType(inputEvent.type)) {
1204         // Save m_mouseCaptureNode since mouseCaptureLost() will clear it.
1205         RefPtr<Node> node = m_mouseCaptureNode;
1206
1207         // Not all platforms call mouseCaptureLost() directly.
1208         if (inputEvent.type == WebInputEvent::MouseUp)
1209             mouseCaptureLost();
1210
1211         AtomicString eventType;
1212         switch (inputEvent.type) {
1213         case WebInputEvent::MouseMove:
1214             eventType = eventNames().mousemoveEvent;
1215             break;
1216         case WebInputEvent::MouseLeave:
1217             eventType = eventNames().mouseoutEvent;
1218             break;
1219         case WebInputEvent::MouseDown:
1220             eventType = eventNames().mousedownEvent;
1221             break;
1222         case WebInputEvent::MouseUp:
1223             eventType = eventNames().mouseupEvent;
1224             break;
1225         default:
1226             ASSERT_NOT_REACHED();
1227         }
1228
1229         node->dispatchMouseEvent(
1230               PlatformMouseEventBuilder(mainFrameImpl()->frameView(), *static_cast<const WebMouseEvent*>(&inputEvent)),
1231               eventType, static_cast<const WebMouseEvent*>(&inputEvent)->clickCount);
1232         m_currentInputEvent = 0;
1233         return true;
1234     }
1235
1236     bool handled = true;
1237
1238     // FIXME: WebKit seems to always return false on mouse events processing
1239     // methods. For now we'll assume it has processed them (as we are only
1240     // interested in whether keyboard events are processed).
1241     switch (inputEvent.type) {
1242     case WebInputEvent::MouseMove:
1243         mouseMove(*static_cast<const WebMouseEvent*>(&inputEvent));
1244         break;
1245
1246     case WebInputEvent::MouseLeave:
1247         mouseLeave(*static_cast<const WebMouseEvent*>(&inputEvent));
1248         break;
1249
1250     case WebInputEvent::MouseWheel:
1251         handled = mouseWheel(*static_cast<const WebMouseWheelEvent*>(&inputEvent));
1252         break;
1253
1254     case WebInputEvent::MouseDown:
1255         mouseDown(*static_cast<const WebMouseEvent*>(&inputEvent));
1256         break;
1257
1258     case WebInputEvent::MouseUp:
1259         mouseUp(*static_cast<const WebMouseEvent*>(&inputEvent));
1260         break;
1261
1262     case WebInputEvent::RawKeyDown:
1263     case WebInputEvent::KeyDown:
1264     case WebInputEvent::KeyUp:
1265         handled = keyEvent(*static_cast<const WebKeyboardEvent*>(&inputEvent));
1266         break;
1267
1268     case WebInputEvent::Char:
1269         handled = charEvent(*static_cast<const WebKeyboardEvent*>(&inputEvent));
1270         break;
1271
1272 #if ENABLE(GESTURE_EVENTS)
1273     case WebInputEvent::GestureScrollBegin:
1274     case WebInputEvent::GestureScrollEnd:
1275     case WebInputEvent::GestureTap:
1276         handled = gestureEvent(*static_cast<const WebGestureEvent*>(&inputEvent));
1277         break;
1278 #endif
1279
1280 #if ENABLE(TOUCH_EVENTS)
1281     case WebInputEvent::TouchStart:
1282     case WebInputEvent::TouchMove:
1283     case WebInputEvent::TouchEnd:
1284     case WebInputEvent::TouchCancel:
1285         handled = touchEvent(*static_cast<const WebTouchEvent*>(&inputEvent));
1286         break;
1287 #endif
1288
1289     default:
1290         handled = false;
1291     }
1292
1293     m_currentInputEvent = 0;
1294
1295     return handled;
1296 }
1297
1298 void WebViewImpl::mouseCaptureLost()
1299 {
1300     m_mouseCaptureNode = 0;
1301 }
1302
1303 void WebViewImpl::setFocus(bool enable)
1304 {
1305     m_page->focusController()->setFocused(enable);
1306     if (enable) {
1307         // Note that we don't call setActive() when disabled as this cause extra
1308         // focus/blur events to be dispatched.
1309         m_page->focusController()->setActive(true);
1310         RefPtr<Frame> focusedFrame = m_page->focusController()->focusedFrame();
1311         if (focusedFrame) {
1312             Node* focusedNode = focusedFrame->document()->focusedNode();
1313             if (focusedNode && focusedNode->isElementNode()
1314                 && focusedFrame->selection()->selection().isNone()) {
1315                 // If the selection was cleared while the WebView was not
1316                 // focused, then the focus element shows with a focus ring but
1317                 // no caret and does respond to keyboard inputs.
1318                 Element* element = static_cast<Element*>(focusedNode);
1319                 if (element->isTextFormControl())
1320                     element->updateFocusAppearance(true);
1321                 else if (focusedNode->isContentEditable()) {
1322                     // updateFocusAppearance() selects all the text of
1323                     // contentseditable DIVs. So we set the selection explicitly
1324                     // instead. Note that this has the side effect of moving the
1325                     // caret back to the beginning of the text.
1326                     Position position(focusedNode, 0,
1327                                       Position::PositionIsOffsetInAnchor);
1328                     focusedFrame->selection()->setSelection(
1329                         VisibleSelection(position, SEL_DEFAULT_AFFINITY));
1330                 }
1331             }
1332         }
1333         m_imeAcceptEvents = true;
1334     } else {
1335         hideAutofillPopup();
1336         hideSelectPopup();
1337
1338         // Clear focus on the currently focused frame if any.
1339         if (!m_page.get())
1340             return;
1341
1342         Frame* frame = m_page->mainFrame();
1343         if (!frame)
1344             return;
1345
1346         RefPtr<Frame> focusedFrame = m_page->focusController()->focusedFrame();
1347         if (focusedFrame.get()) {
1348             // Finish an ongoing composition to delete the composition node.
1349             Editor* editor = focusedFrame->editor();
1350             if (editor && editor->hasComposition())
1351                 editor->confirmComposition();
1352             m_imeAcceptEvents = false;
1353         }
1354     }
1355 }
1356
1357 bool WebViewImpl::setComposition(
1358     const WebString& text,
1359     const WebVector<WebCompositionUnderline>& underlines,
1360     int selectionStart,
1361     int selectionEnd)
1362 {
1363     Frame* focused = focusedWebCoreFrame();
1364     if (!focused || !m_imeAcceptEvents)
1365         return false;
1366     Editor* editor = focused->editor();
1367     if (!editor)
1368         return false;
1369
1370     // The input focus has been moved to another WebWidget object.
1371     // We should use this |editor| object only to complete the ongoing
1372     // composition.
1373     if (!editor->canEdit() && !editor->hasComposition())
1374         return false;
1375
1376     // We should verify the parent node of this IME composition node are
1377     // editable because JavaScript may delete a parent node of the composition
1378     // node. In this case, WebKit crashes while deleting texts from the parent
1379     // node, which doesn't exist any longer.
1380     PassRefPtr<Range> range = editor->compositionRange();
1381     if (range) {
1382         Node* node = range->startContainer();
1383         if (!node || !node->isContentEditable())
1384             return false;
1385     }
1386
1387     // If we're not going to fire a keypress event, then the keydown event was
1388     // canceled.  In that case, cancel any existing composition.
1389     if (text.isEmpty() || m_suppressNextKeypressEvent) {
1390         // A browser process sent an IPC message which does not contain a valid
1391         // string, which means an ongoing composition has been canceled.
1392         // If the ongoing composition has been canceled, replace the ongoing
1393         // composition string with an empty string and complete it.
1394         String emptyString;
1395         Vector<CompositionUnderline> emptyUnderlines;
1396         editor->setComposition(emptyString, emptyUnderlines, 0, 0);
1397         return text.isEmpty();
1398     }
1399
1400     // When the range of composition underlines overlap with the range between
1401     // selectionStart and selectionEnd, WebKit somehow won't paint the selection
1402     // at all (see InlineTextBox::paint() function in InlineTextBox.cpp).
1403     // But the selection range actually takes effect.
1404     editor->setComposition(String(text),
1405                            CompositionUnderlineVectorBuilder(underlines),
1406                            selectionStart, selectionEnd);
1407
1408     return editor->hasComposition();
1409 }
1410
1411 bool WebViewImpl::confirmComposition()
1412 {
1413     return confirmComposition(WebString());
1414 }
1415
1416 bool WebViewImpl::confirmComposition(const WebString& text)
1417 {
1418     Frame* focused = focusedWebCoreFrame();
1419     if (!focused || !m_imeAcceptEvents)
1420         return false;
1421     Editor* editor = focused->editor();
1422     if (!editor || (!editor->hasComposition() && !text.length()))
1423         return false;
1424
1425     // We should verify the parent node of this IME composition node are
1426     // editable because JavaScript may delete a parent node of the composition
1427     // node. In this case, WebKit crashes while deleting texts from the parent
1428     // node, which doesn't exist any longer.
1429     PassRefPtr<Range> range = editor->compositionRange();
1430     if (range) {
1431         Node* node = range->startContainer();
1432         if (!node || !node->isContentEditable())
1433             return false;
1434     }
1435
1436     if (editor->hasComposition()) {
1437         if (text.length())
1438             editor->confirmComposition(String(text));
1439         else
1440             editor->confirmComposition();
1441     } else
1442         editor->insertText(String(text), 0);
1443
1444     return true;
1445 }
1446
1447 bool WebViewImpl::compositionRange(size_t* location, size_t* length)
1448 {
1449     Frame* focused = focusedWebCoreFrame();
1450     if (!focused || !m_imeAcceptEvents)
1451         return false;
1452     Editor* editor = focused->editor();
1453     if (!editor || !editor->hasComposition())
1454         return false;
1455
1456     RefPtr<Range> range = editor->compositionRange();
1457     if (!range.get())
1458         return false;
1459
1460     if (TextIterator::locationAndLengthFromRange(range.get(), *location, *length))
1461         return true;
1462     return false;
1463 }
1464
1465 WebTextInputType WebViewImpl::textInputType()
1466 {
1467     Node* node = focusedWebCoreNode();
1468     if (!node)
1469         return WebTextInputTypeNone;
1470
1471     if (node->nodeType() == Node::ELEMENT_NODE) {
1472         Element* element = static_cast<Element*>(node);
1473         if (element->hasLocalName(HTMLNames::inputTag)) {
1474             HTMLInputElement* input = static_cast<HTMLInputElement*>(element);
1475
1476             if (input->readOnly() || input->disabled())
1477                 return WebTextInputTypeNone;
1478
1479             if (input->isPasswordField())
1480                 return WebTextInputTypePassword;
1481             if (input->isSearchField())
1482                 return WebTextInputTypeSearch;
1483             if (input->isEmailField())
1484                 return WebTextInputTypeEmail;
1485             if (input->isNumberField())
1486                 return WebTextInputTypeNumber;
1487             if (input->isTelephoneField())
1488                 return WebTextInputTypeTelephone;
1489             if (input->isURLField())
1490                 return WebTextInputTypeURL;
1491             if (input->isTextField())
1492                 return WebTextInputTypeText;
1493             return WebTextInputTypeNone;
1494         }
1495
1496         if (element->hasLocalName(HTMLNames::textareaTag)) {
1497             HTMLTextAreaElement* textarea = static_cast<HTMLTextAreaElement*>(element);
1498
1499             if (textarea->readOnly() || textarea->disabled())
1500                 return WebTextInputTypeNone;
1501             return WebTextInputTypeText;
1502         }
1503     }
1504
1505     // For other situations.
1506     if (node->shouldUseInputMethod())
1507         return WebTextInputTypeText;
1508
1509     return WebTextInputTypeNone;
1510 }
1511
1512 WebRect WebViewImpl::caretOrSelectionBounds()
1513 {
1514     WebRect rect;
1515     const Frame* focused = focusedWebCoreFrame();
1516     if (!focused)
1517         return rect;
1518
1519     FrameSelection* selection = focused->selection();
1520     if (!selection)
1521         return rect;
1522
1523     const FrameView* view = focused->view();
1524     if (!view)
1525         return rect;
1526
1527     const Node* node = selection->base().containerNode();
1528     if (!node || !node->renderer())
1529         return rect;
1530
1531     if (selection->isCaret())
1532         rect = view->contentsToWindow(selection->absoluteCaretBounds());
1533     else if (selection->isRange()) {
1534         node = selection->extent().containerNode();
1535         RefPtr<Range> range = selection->toNormalizedRange();
1536         if (!node || !node->renderer() || !range)
1537             return rect;
1538         rect = view->contentsToWindow(focused->editor()->firstRectForRange(range.get()));
1539     }
1540     return rect;
1541 }
1542
1543 bool WebViewImpl::selectionRange(WebPoint& start, WebPoint& end) const
1544 {
1545     const Frame* frame = focusedWebCoreFrame();
1546     if (!frame || !frame->selection()->isRange())
1547         return false;
1548     RefPtr<Range> selectedRange = frame->selection()->toNormalizedRange();
1549     if (!selectedRange)
1550         return false;
1551     RefPtr<Range> range(Range::create(selectedRange->startContainer()->document(),
1552                                       selectedRange->startContainer(),
1553                                       selectedRange->startOffset(),
1554                                       selectedRange->startContainer(),
1555                                       selectedRange->startOffset()));
1556
1557     IntRect rect = frame->editor()->firstRectForRange(range.get());
1558     start.x = rect.x();
1559     start.y = rect.y() + rect.height() - 1;
1560
1561     range = Range::create(selectedRange->endContainer()->document(),
1562                           selectedRange->endContainer(),
1563                           selectedRange->endOffset(),
1564                           selectedRange->endContainer(),
1565                           selectedRange->endOffset());
1566
1567     rect = frame->editor()->firstRectForRange(range.get());
1568     end.x = rect.x() + rect.width() - 1;
1569     end.y = rect.y() + rect.height() - 1;
1570
1571     start = frame->view()->contentsToWindow(start);
1572     end = frame->view()->contentsToWindow(end);
1573     return true;
1574 }
1575
1576 bool WebViewImpl::caretOrSelectionRange(size_t* location, size_t* length)
1577 {
1578     const Frame* focused = focusedWebCoreFrame();
1579     if (!focused)
1580         return false;
1581
1582     FrameSelection* selection = focused->selection();
1583     if (!selection)
1584         return false;
1585
1586     RefPtr<Range> range = selection->selection().firstRange();
1587     if (!range.get())
1588         return false;
1589
1590     if (TextIterator::locationAndLengthFromRange(range.get(), *location, *length))
1591         return true;
1592     return false;
1593 }
1594
1595 void WebViewImpl::setTextDirection(WebTextDirection direction)
1596 {
1597     // The Editor::setBaseWritingDirection() function checks if we can change
1598     // the text direction of the selected node and updates its DOM "dir"
1599     // attribute and its CSS "direction" property.
1600     // So, we just call the function as Safari does.
1601     const Frame* focused = focusedWebCoreFrame();
1602     if (!focused)
1603         return;
1604
1605     Editor* editor = focused->editor();
1606     if (!editor || !editor->canEdit())
1607         return;
1608
1609     switch (direction) {
1610     case WebTextDirectionDefault:
1611         editor->setBaseWritingDirection(NaturalWritingDirection);
1612         break;
1613
1614     case WebTextDirectionLeftToRight:
1615         editor->setBaseWritingDirection(LeftToRightWritingDirection);
1616         break;
1617
1618     case WebTextDirectionRightToLeft:
1619         editor->setBaseWritingDirection(RightToLeftWritingDirection);
1620         break;
1621
1622     default:
1623         notImplemented();
1624         break;
1625     }
1626 }
1627
1628 bool WebViewImpl::isAcceleratedCompositingActive() const
1629 {
1630 #if USE(ACCELERATED_COMPOSITING)
1631     return m_isAcceleratedCompositingActive;
1632 #else
1633     return false;
1634 #endif
1635 }
1636
1637 // WebView --------------------------------------------------------------------
1638
1639 WebSettings* WebViewImpl::settings()
1640 {
1641     if (!m_webSettings)
1642         m_webSettings = adoptPtr(new WebSettingsImpl(m_page->settings()));
1643     ASSERT(m_webSettings.get());
1644     return m_webSettings.get();
1645 }
1646
1647 WebString WebViewImpl::pageEncoding() const
1648 {
1649     if (!m_page.get())
1650         return WebString();
1651
1652     return m_page->mainFrame()->document()->loader()->writer()->encoding();
1653 }
1654
1655 void WebViewImpl::setPageEncoding(const WebString& encodingName)
1656 {
1657     if (!m_page.get())
1658         return;
1659
1660     // Only change override encoding, don't change default encoding.
1661     // Note that the new encoding must be 0 if it isn't supposed to be set.
1662     String newEncodingName;
1663     if (!encodingName.isEmpty())
1664         newEncodingName = encodingName;
1665     m_page->mainFrame()->loader()->reloadWithOverrideEncoding(newEncodingName);
1666 }
1667
1668 bool WebViewImpl::dispatchBeforeUnloadEvent()
1669 {
1670     // FIXME: This should really cause a recursive depth-first walk of all
1671     // frames in the tree, calling each frame's onbeforeunload.  At the moment,
1672     // we're consistent with Safari 3.1, not IE/FF.
1673     Frame* frame = m_page->mainFrame();
1674     if (!frame)
1675         return true;
1676
1677     return frame->loader()->shouldClose();
1678 }
1679
1680 void WebViewImpl::dispatchUnloadEvent()
1681 {
1682     // Run unload handlers.
1683     m_page->mainFrame()->loader()->closeURL();
1684 }
1685
1686 WebFrame* WebViewImpl::mainFrame()
1687 {
1688     return mainFrameImpl();
1689 }
1690
1691 WebFrame* WebViewImpl::findFrameByName(
1692     const WebString& name, WebFrame* relativeToFrame)
1693 {
1694     if (!relativeToFrame)
1695         relativeToFrame = mainFrame();
1696     Frame* frame = static_cast<WebFrameImpl*>(relativeToFrame)->frame();
1697     frame = frame->tree()->find(name);
1698     return WebFrameImpl::fromFrame(frame);
1699 }
1700
1701 WebFrame* WebViewImpl::focusedFrame()
1702 {
1703     return WebFrameImpl::fromFrame(focusedWebCoreFrame());
1704 }
1705
1706 void WebViewImpl::setFocusedFrame(WebFrame* frame)
1707 {
1708     if (!frame) {
1709         // Clears the focused frame if any.
1710         Frame* frame = focusedWebCoreFrame();
1711         if (frame)
1712             frame->selection()->setFocused(false);
1713         return;
1714     }
1715     WebFrameImpl* frameImpl = static_cast<WebFrameImpl*>(frame);
1716     Frame* webcoreFrame = frameImpl->frame();
1717     webcoreFrame->page()->focusController()->setFocusedFrame(webcoreFrame);
1718 }
1719
1720 void WebViewImpl::setInitialFocus(bool reverse)
1721 {
1722     if (!m_page.get())
1723         return;
1724
1725     // Since we don't have a keyboard event, we'll create one.
1726     WebKeyboardEvent keyboardEvent;
1727     keyboardEvent.type = WebInputEvent::RawKeyDown;
1728     if (reverse)
1729         keyboardEvent.modifiers = WebInputEvent::ShiftKey;
1730
1731     // VK_TAB which is only defined on Windows.
1732     keyboardEvent.windowsKeyCode = 0x09;
1733     PlatformKeyboardEventBuilder platformEvent(keyboardEvent);
1734     RefPtr<KeyboardEvent> webkitEvent = KeyboardEvent::create(platformEvent, 0);
1735
1736     Frame* frame = page()->focusController()->focusedOrMainFrame();
1737     if (Document* document = frame->document())
1738         document->setFocusedNode(0);
1739     page()->focusController()->setInitialFocus(
1740         reverse ? FocusDirectionBackward : FocusDirectionForward,
1741         webkitEvent.get());
1742 }
1743
1744 void WebViewImpl::clearFocusedNode()
1745 {
1746     if (!m_page.get())
1747         return;
1748
1749     RefPtr<Frame> frame = m_page->mainFrame();
1750     if (!frame.get())
1751         return;
1752
1753     RefPtr<Document> document = frame->document();
1754     if (!document.get())
1755         return;
1756
1757     RefPtr<Node> oldFocusedNode = document->focusedNode();
1758
1759     // Clear the focused node.
1760     document->setFocusedNode(0);
1761
1762     if (!oldFocusedNode.get())
1763         return;
1764
1765     // If a text field has focus, we need to make sure the selection controller
1766     // knows to remove selection from it. Otherwise, the text field is still
1767     // processing keyboard events even though focus has been moved to the page and
1768     // keystrokes get eaten as a result.
1769     if (oldFocusedNode->hasTagName(HTMLNames::textareaTag)
1770         || (oldFocusedNode->hasTagName(HTMLNames::inputTag)
1771             && static_cast<HTMLInputElement*>(oldFocusedNode.get())->isTextField())) {
1772         frame->selection()->clear();
1773     }
1774 }
1775
1776 void WebViewImpl::scrollFocusedNodeIntoView()
1777 {
1778     Node* focusedNode = focusedWebCoreNode();
1779     if (focusedNode && focusedNode->isElementNode()) {
1780         Element* elementNode = static_cast<Element*>(focusedNode);
1781         elementNode->scrollIntoViewIfNeeded(true);
1782     }
1783 }
1784
1785 double WebViewImpl::zoomLevel()
1786 {
1787     return m_zoomLevel;
1788 }
1789
1790 double WebViewImpl::setZoomLevel(bool textOnly, double zoomLevel)
1791 {
1792     if (zoomLevel < m_minimumZoomLevel)
1793         m_zoomLevel = m_minimumZoomLevel;
1794     else if (zoomLevel > m_maximumZoomLevel)
1795         m_zoomLevel = m_maximumZoomLevel;
1796     else
1797         m_zoomLevel = zoomLevel;
1798
1799     Frame* frame = mainFrameImpl()->frame();
1800     WebPluginContainerImpl* pluginContainer = WebFrameImpl::pluginContainerFromFrame(frame);
1801     if (pluginContainer)
1802         pluginContainer->plugin()->setZoomLevel(m_zoomLevel, textOnly);
1803     else {
1804         float zoomFactor = static_cast<float>(zoomLevelToZoomFactor(m_zoomLevel));
1805         if (textOnly)
1806             frame->setPageAndTextZoomFactors(1, zoomFactor);
1807         else
1808             frame->setPageAndTextZoomFactors(zoomFactor, 1);
1809     }
1810     return m_zoomLevel;
1811 }
1812
1813 void WebViewImpl::zoomLimitsChanged(double minimumZoomLevel,
1814                                     double maximumZoomLevel)
1815 {
1816     m_minimumZoomLevel = minimumZoomLevel;
1817     m_maximumZoomLevel = maximumZoomLevel;
1818     m_client->zoomLimitsChanged(m_minimumZoomLevel, m_maximumZoomLevel);
1819 }
1820
1821 void WebViewImpl::fullFramePluginZoomLevelChanged(double zoomLevel)
1822 {
1823     if (zoomLevel == m_zoomLevel)
1824         return;
1825
1826     m_zoomLevel = max(min(zoomLevel, m_maximumZoomLevel), m_minimumZoomLevel);
1827     m_client->zoomLevelChanged();
1828 }
1829
1830 double WebView::zoomLevelToZoomFactor(double zoomLevel)
1831 {
1832     return pow(textSizeMultiplierRatio, zoomLevel);
1833 }
1834
1835 double WebView::zoomFactorToZoomLevel(double factor)
1836 {
1837     // Since factor = 1.2^level, level = log(factor) / log(1.2)
1838     return log(factor) / log(textSizeMultiplierRatio);
1839 }
1840
1841 void WebViewImpl::scalePage(float scaleFactor, WebPoint origin)
1842 {
1843     if (!page())
1844         return;
1845
1846     Frame* frame = page()->mainFrame();
1847     if (!frame)
1848         return;
1849
1850     frame->scalePage(scaleFactor, origin);
1851 }
1852
1853 void WebViewImpl::performMediaPlayerAction(const WebMediaPlayerAction& action,
1854                                            const WebPoint& location)
1855 {
1856     HitTestResult result = hitTestResultForWindowPos(location);
1857     RefPtr<Node> node = result.innerNonSharedNode();
1858     if (!node->hasTagName(HTMLNames::videoTag) && !node->hasTagName(HTMLNames::audioTag))
1859       return;
1860
1861     RefPtr<HTMLMediaElement> mediaElement =
1862         static_pointer_cast<HTMLMediaElement>(node);
1863     switch (action.type) {
1864     case WebMediaPlayerAction::Play:
1865         if (action.enable)
1866             mediaElement->play();
1867         else
1868             mediaElement->pause();
1869         break;
1870     case WebMediaPlayerAction::Mute:
1871         mediaElement->setMuted(action.enable);
1872         break;
1873     case WebMediaPlayerAction::Loop:
1874         mediaElement->setLoop(action.enable);
1875         break;
1876     case WebMediaPlayerAction::Controls:
1877         mediaElement->setControls(action.enable);
1878         break;
1879     default:
1880         ASSERT_NOT_REACHED();
1881     }
1882 }
1883
1884 void WebViewImpl::copyImageAt(const WebPoint& point)
1885 {
1886     if (!m_page.get())
1887         return;
1888
1889     HitTestResult result = hitTestResultForWindowPos(point);
1890
1891     if (result.absoluteImageURL().isEmpty()) {
1892         // There isn't actually an image at these coordinates.  Might be because
1893         // the window scrolled while the context menu was open or because the page
1894         // changed itself between when we thought there was an image here and when
1895         // we actually tried to retreive the image.
1896         //
1897         // FIXME: implement a cache of the most recent HitTestResult to avoid having
1898         //        to do two hit tests.
1899         return;
1900     }
1901
1902     m_page->mainFrame()->editor()->copyImage(result);
1903 }
1904
1905 void WebViewImpl::dragSourceEndedAt(
1906     const WebPoint& clientPoint,
1907     const WebPoint& screenPoint,
1908     WebDragOperation operation)
1909 {
1910     PlatformMouseEvent pme(clientPoint,
1911                            screenPoint,
1912                            LeftButton, MouseEventMoved, 0, false, false, false,
1913                            false, 0);
1914     m_page->mainFrame()->eventHandler()->dragSourceEndedAt(pme,
1915         static_cast<DragOperation>(operation));
1916     m_dragScrollTimer->stop();
1917 }
1918
1919 void WebViewImpl::dragSourceMovedTo(
1920     const WebPoint& clientPoint,
1921     const WebPoint& screenPoint,
1922     WebDragOperation operation)
1923 {
1924     m_dragScrollTimer->triggerScroll(mainFrameImpl()->frameView(), clientPoint);
1925 }
1926
1927 void WebViewImpl::dragSourceSystemDragEnded()
1928 {
1929     // It's possible for us to get this callback while not doing a drag if
1930     // it's from a previous page that got unloaded.
1931     if (m_doingDragAndDrop) {
1932         m_page->dragController()->dragEnded();
1933         m_doingDragAndDrop = false;
1934     }
1935 }
1936
1937 WebDragOperation WebViewImpl::dragTargetDragEnter(
1938     const WebDragData& webDragData,
1939     const WebPoint& clientPoint,
1940     const WebPoint& screenPoint,
1941     WebDragOperationsMask operationsAllowed)
1942 {
1943     ASSERT(!m_currentDragData.get());
1944
1945     m_currentDragData = webDragData;
1946     m_operationsAllowed = operationsAllowed;
1947
1948     return dragTargetDragEnterOrOver(clientPoint, screenPoint, DragEnter);
1949 }
1950
1951 WebDragOperation WebViewImpl::dragTargetDragOver(
1952     const WebPoint& clientPoint,
1953     const WebPoint& screenPoint,
1954     WebDragOperationsMask operationsAllowed)
1955 {
1956     m_operationsAllowed = operationsAllowed;
1957
1958     return dragTargetDragEnterOrOver(clientPoint, screenPoint, DragOver);
1959 }
1960
1961 void WebViewImpl::dragTargetDragLeave()
1962 {
1963     ASSERT(m_currentDragData.get());
1964
1965     DragData dragData(
1966         m_currentDragData.get(),
1967         IntPoint(),
1968         IntPoint(),
1969         static_cast<DragOperation>(m_operationsAllowed));
1970
1971     m_page->dragController()->dragExited(&dragData);
1972
1973     // FIXME: why is the drag scroll timer not stopped here?
1974
1975     m_dragOperation = WebDragOperationNone;
1976     m_currentDragData = 0;
1977 }
1978
1979 void WebViewImpl::dragTargetDrop(const WebPoint& clientPoint,
1980                                  const WebPoint& screenPoint)
1981 {
1982     ASSERT(m_currentDragData.get());
1983
1984     // If this webview transitions from the "drop accepting" state to the "not
1985     // accepting" state, then our IPC message reply indicating that may be in-
1986     // flight, or else delayed by javascript processing in this webview.  If a
1987     // drop happens before our IPC reply has reached the browser process, then
1988     // the browser forwards the drop to this webview.  So only allow a drop to
1989     // proceed if our webview m_dragOperation state is not DragOperationNone.
1990
1991     if (m_dragOperation == WebDragOperationNone) { // IPC RACE CONDITION: do not allow this drop.
1992         dragTargetDragLeave();
1993         return;
1994     }
1995
1996     DragData dragData(
1997         m_currentDragData.get(),
1998         clientPoint,
1999         screenPoint,
2000         static_cast<DragOperation>(m_operationsAllowed));
2001
2002     m_page->dragController()->performDrag(&dragData);
2003
2004     m_dragOperation = WebDragOperationNone;
2005     m_currentDragData = 0;
2006
2007     m_dragScrollTimer->stop();
2008 }
2009
2010 WebDragOperation WebViewImpl::dragTargetDragEnterOrOver(const WebPoint& clientPoint, const WebPoint& screenPoint, DragAction dragAction)
2011 {
2012     ASSERT(m_currentDragData.get());
2013
2014     DragData dragData(
2015         m_currentDragData.get(),
2016         clientPoint,
2017         screenPoint,
2018         static_cast<DragOperation>(m_operationsAllowed));
2019
2020     DragOperation dropEffect;
2021     if (dragAction == DragEnter)
2022         dropEffect = m_page->dragController()->dragEntered(&dragData);
2023     else
2024         dropEffect = m_page->dragController()->dragUpdated(&dragData);
2025
2026     // Mask the drop effect operation against the drag source's allowed operations.
2027     if (!(dropEffect & dragData.draggingSourceOperationMask()))
2028         dropEffect = DragOperationNone;
2029
2030      m_dragOperation = static_cast<WebDragOperation>(dropEffect);
2031
2032     if (dragAction == DragOver)
2033         m_dragScrollTimer->triggerScroll(mainFrameImpl()->frameView(), clientPoint);
2034     else
2035         m_dragScrollTimer->stop();
2036
2037     return m_dragOperation;
2038 }
2039
2040 unsigned long WebViewImpl::createUniqueIdentifierForRequest()
2041 {
2042     if (m_page)
2043         return m_page->progress()->createUniqueIdentifier();
2044     return 0;
2045 }
2046
2047 void WebViewImpl::inspectElementAt(const WebPoint& point)
2048 {
2049     if (!m_page.get())
2050         return;
2051
2052     if (point.x == -1 || point.y == -1)
2053         m_page->inspectorController()->inspect(0);
2054     else {
2055         HitTestResult result = hitTestResultForWindowPos(point);
2056
2057         if (!result.innerNonSharedNode())
2058             return;
2059
2060         m_page->inspectorController()->inspect(result.innerNonSharedNode());
2061     }
2062 }
2063
2064 WebString WebViewImpl::inspectorSettings() const
2065 {
2066     return m_inspectorSettings;
2067 }
2068
2069 void WebViewImpl::setInspectorSettings(const WebString& settings)
2070 {
2071     m_inspectorSettings = settings;
2072 }
2073
2074 bool WebViewImpl::inspectorSetting(const WebString& key, WebString* value) const
2075 {
2076     if (!m_inspectorSettingsMap->contains(key))
2077         return false;
2078     *value = m_inspectorSettingsMap->get(key);
2079     return true;
2080 }
2081
2082 void WebViewImpl::setInspectorSetting(const WebString& key,
2083                                       const WebString& value)
2084 {
2085     m_inspectorSettingsMap->set(key, value);
2086     client()->didUpdateInspectorSetting(key, value);
2087 }
2088
2089 WebDevToolsAgent* WebViewImpl::devToolsAgent()
2090 {
2091     return m_devToolsAgent.get();
2092 }
2093
2094 WebAccessibilityObject WebViewImpl::accessibilityObject()
2095 {
2096     if (!mainFrameImpl())
2097         return WebAccessibilityObject();
2098
2099     Document* document = mainFrameImpl()->frame()->document();
2100     return WebAccessibilityObject(
2101         document->axObjectCache()->getOrCreate(document->renderer()));
2102 }
2103
2104 void WebViewImpl::applyAutofillSuggestions(
2105     const WebNode& node,
2106     const WebVector<WebString>& names,
2107     const WebVector<WebString>& labels,
2108     const WebVector<WebString>& icons,
2109     const WebVector<int>& uniqueIDs,
2110     int separatorIndex)
2111 {
2112     ASSERT(names.size() == labels.size());
2113     ASSERT(names.size() == uniqueIDs.size());
2114     ASSERT(separatorIndex < static_cast<int>(names.size()));
2115
2116     if (names.isEmpty()) {
2117         hideAutofillPopup();
2118         return;
2119     }
2120
2121     RefPtr<Node> focusedNode = focusedWebCoreNode();
2122     // If the node for which we queried the Autofill suggestions is not the
2123     // focused node, then we have nothing to do.  FIXME: also check the
2124     // caret is at the end and that the text has not changed.
2125     if (!focusedNode || focusedNode != PassRefPtr<Node>(node)) {
2126         hideAutofillPopup();
2127         return;
2128     }
2129
2130     HTMLInputElement* inputElem =
2131         static_cast<HTMLInputElement*>(focusedNode.get());
2132
2133     // The first time the Autofill popup is shown we'll create the client and
2134     // the popup.
2135     if (!m_autofillPopupClient)
2136         m_autofillPopupClient = adoptPtr(new AutofillPopupMenuClient);
2137
2138     m_autofillPopupClient->initialize(
2139         inputElem, names, labels, icons, uniqueIDs, separatorIndex);
2140
2141     if (!m_autofillPopup.get()) {
2142         m_autofillPopup = PopupContainer::create(m_autofillPopupClient.get(),
2143                                                  PopupContainer::Suggestion,
2144                                                  autofillPopupSettings);
2145     }
2146
2147     if (m_autofillPopupShowing) {
2148         refreshAutofillPopup();
2149     } else {
2150         m_autofillPopup->showInRect(focusedNode->getRect(), focusedNode->ownerDocument()->view(), 0);
2151         m_autofillPopupShowing = true;
2152     }
2153 }
2154
2155 void WebViewImpl::hidePopups()
2156 {
2157     hideSelectPopup();
2158     hideAutofillPopup();
2159 }
2160
2161 void WebViewImpl::performCustomContextMenuAction(unsigned action)
2162 {
2163     if (!m_page)
2164         return;
2165     ContextMenu* menu = m_page->contextMenuController()->contextMenu();
2166     if (!menu)
2167         return;
2168     ContextMenuItem* item = menu->itemWithAction(static_cast<ContextMenuAction>(ContextMenuItemBaseCustomTag + action));
2169     if (item)
2170         m_page->contextMenuController()->contextMenuItemSelected(item);
2171     m_page->contextMenuController()->clearContextMenu();
2172 }
2173
2174 // WebView --------------------------------------------------------------------
2175
2176 void WebViewImpl::setIsTransparent(bool isTransparent)
2177 {
2178     // Set any existing frames to be transparent.
2179     Frame* frame = m_page->mainFrame();
2180     while (frame) {
2181         frame->view()->setTransparent(isTransparent);
2182         frame = frame->tree()->traverseNext();
2183     }
2184
2185     // Future frames check this to know whether to be transparent.
2186     m_isTransparent = isTransparent;
2187 }
2188
2189 bool WebViewImpl::isTransparent() const
2190 {
2191     return m_isTransparent;
2192 }
2193
2194 void WebViewImpl::setIsActive(bool active)
2195 {
2196     if (page() && page()->focusController())
2197         page()->focusController()->setActive(active);
2198 }
2199
2200 bool WebViewImpl::isActive() const
2201 {
2202     return (page() && page()->focusController()) ? page()->focusController()->isActive() : false;
2203 }
2204
2205 void WebViewImpl::setDomainRelaxationForbidden(bool forbidden, const WebString& scheme)
2206 {
2207     SecurityOrigin::setDomainRelaxationForbiddenForURLScheme(forbidden, String(scheme));
2208 }
2209
2210 void WebViewImpl::setScrollbarColors(unsigned inactiveColor,
2211                                      unsigned activeColor,
2212                                      unsigned trackColor) {
2213 #if OS(UNIX) && !OS(DARWIN)
2214     PlatformThemeChromiumGtk::setScrollbarColors(inactiveColor,
2215                                                  activeColor,
2216                                                  trackColor);
2217 #endif
2218 }
2219
2220 void WebViewImpl::setSelectionColors(unsigned activeBackgroundColor,
2221                                      unsigned activeForegroundColor,
2222                                      unsigned inactiveBackgroundColor,
2223                                      unsigned inactiveForegroundColor) {
2224 #if OS(UNIX) && !OS(DARWIN)
2225     RenderThemeChromiumLinux::setSelectionColors(activeBackgroundColor,
2226                                                  activeForegroundColor,
2227                                                  inactiveBackgroundColor,
2228                                                  inactiveForegroundColor);
2229     theme()->platformColorsDidChange();
2230 #endif
2231 }
2232
2233 void WebView::addUserScript(const WebString& sourceCode,
2234                             const WebVector<WebString>& patternsIn,
2235                             WebView::UserScriptInjectAt injectAt,
2236                             WebView::UserContentInjectIn injectIn)
2237 {
2238     OwnPtr<Vector<String> > patterns = adoptPtr(new Vector<String>);
2239     for (size_t i = 0; i < patternsIn.size(); ++i)
2240         patterns->append(patternsIn[i]);
2241
2242     PageGroup* pageGroup = PageGroup::pageGroup(pageGroupName);
2243     RefPtr<DOMWrapperWorld> world(DOMWrapperWorld::create());
2244     pageGroup->addUserScriptToWorld(world.get(), sourceCode, WebURL(), patterns.release(), nullptr,
2245                                     static_cast<UserScriptInjectionTime>(injectAt),
2246                                     static_cast<UserContentInjectedFrames>(injectIn));
2247 }
2248
2249 void WebView::addUserStyleSheet(const WebString& sourceCode,
2250                                 const WebVector<WebString>& patternsIn,
2251                                 WebView::UserContentInjectIn injectIn,
2252                                 WebView::UserStyleInjectionTime injectionTime)
2253 {
2254     OwnPtr<Vector<String> > patterns = adoptPtr(new Vector<String>);
2255     for (size_t i = 0; i < patternsIn.size(); ++i)
2256         patterns->append(patternsIn[i]);
2257
2258     PageGroup* pageGroup = PageGroup::pageGroup(pageGroupName);
2259     RefPtr<DOMWrapperWorld> world(DOMWrapperWorld::create());
2260
2261     // FIXME: Current callers always want the level to be "author". It probably makes sense to let
2262     // callers specify this though, since in other cases the caller will probably want "user" level.
2263     //
2264     // FIXME: It would be nice to populate the URL correctly, instead of passing an empty URL.
2265     pageGroup->addUserStyleSheetToWorld(world.get(), sourceCode, WebURL(), patterns.release(), nullptr,
2266                                         static_cast<UserContentInjectedFrames>(injectIn),
2267                                         UserStyleAuthorLevel,
2268                                         static_cast<WebCore::UserStyleInjectionTime>(injectionTime));
2269 }
2270
2271 void WebView::removeAllUserContent()
2272 {
2273     PageGroup* pageGroup = PageGroup::pageGroup(pageGroupName);
2274     pageGroup->removeAllUserContent();
2275 }
2276
2277 void WebViewImpl::didCommitLoad(bool* isNewNavigation)
2278 {
2279     if (isNewNavigation)
2280         *isNewNavigation = m_observedNewNavigation;
2281
2282 #ifndef NDEBUG
2283     ASSERT(!m_observedNewNavigation
2284         || m_page->mainFrame()->loader()->documentLoader() == m_newNavigationLoader);
2285     m_newNavigationLoader = 0;
2286 #endif
2287     m_observedNewNavigation = false;
2288 }
2289
2290 bool WebViewImpl::useExternalPopupMenus()
2291 {
2292     return shouldUseExternalPopupMenus;
2293 }
2294
2295 bool WebViewImpl::navigationPolicyFromMouseEvent(unsigned short button,
2296                                                  bool ctrl, bool shift,
2297                                                  bool alt, bool meta,
2298                                                  WebNavigationPolicy* policy)
2299 {
2300 #if OS(DARWIN)
2301     const bool newTabModifier = (button == 1) || meta;
2302 #else
2303     const bool newTabModifier = (button == 1) || ctrl;
2304 #endif
2305     if (!newTabModifier && !shift && !alt)
2306       return false;
2307
2308     ASSERT(policy);
2309     if (newTabModifier) {
2310         if (shift)
2311           *policy = WebNavigationPolicyNewForegroundTab;
2312         else
2313           *policy = WebNavigationPolicyNewBackgroundTab;
2314     } else {
2315         if (shift)
2316           *policy = WebNavigationPolicyNewWindow;
2317         else
2318           *policy = WebNavigationPolicyDownload;
2319     }
2320     return true;
2321 }
2322
2323 void WebViewImpl::startDragging(const WebDragData& dragData,
2324                                 WebDragOperationsMask mask,
2325                                 const WebImage& dragImage,
2326                                 const WebPoint& dragImageOffset)
2327 {
2328     if (!m_client)
2329         return;
2330     ASSERT(!m_doingDragAndDrop);
2331     m_doingDragAndDrop = true;
2332     m_client->startDragging(dragData, mask, dragImage, dragImageOffset);
2333 }
2334
2335 void WebViewImpl::observeNewNavigation()
2336 {
2337     m_observedNewNavigation = true;
2338 #ifndef NDEBUG
2339     m_newNavigationLoader = m_page->mainFrame()->loader()->documentLoader();
2340 #endif
2341 }
2342
2343 void WebViewImpl::setIgnoreInputEvents(bool newValue)
2344 {
2345     ASSERT(m_ignoreInputEvents != newValue);
2346     m_ignoreInputEvents = newValue;
2347 }
2348
2349 void WebViewImpl::setPageOverlayClient(PageOverlay::PageOverlayClient* pageOverlayClient)
2350 {
2351     if (pageOverlayClient) {
2352         if (!m_pageOverlay)
2353             m_pageOverlay = PageOverlay::create(this, pageOverlayClient);
2354         else
2355             m_pageOverlay->setClient(pageOverlayClient);
2356         m_pageOverlay->update();
2357         setRootLayerNeedsDisplay();
2358     } else {
2359         if (m_pageOverlay) {
2360             m_pageOverlay->clear();
2361             m_pageOverlay = nullptr;
2362             setRootLayerNeedsDisplay();
2363         }
2364     }
2365 }
2366
2367 void WebViewImpl::setOverlayLayer(WebCore::GraphicsLayer* layer)
2368 {
2369     if (m_rootGraphicsLayer) {
2370         if (layer->parent() != m_rootGraphicsLayer)
2371             m_rootGraphicsLayer->addChild(layer);
2372     }
2373 }
2374
2375 #if ENABLE(NOTIFICATIONS)
2376 NotificationPresenterImpl* WebViewImpl::notificationPresenterImpl()
2377 {
2378     if (!m_notificationPresenter.isInitialized() && m_client)
2379         m_notificationPresenter.initialize(m_client->notificationPresenter());
2380     return &m_notificationPresenter;
2381 }
2382 #endif
2383
2384 void WebViewImpl::refreshAutofillPopup()
2385 {
2386     ASSERT(m_autofillPopupShowing);
2387
2388     // Hide the popup if it has become empty.
2389     if (!m_autofillPopupClient->listSize()) {
2390         hideAutofillPopup();
2391         return;
2392     }
2393
2394     IntRect oldBounds = m_autofillPopup->frameRect();
2395     m_autofillPopup->refresh(focusedWebCoreNode()->getRect());
2396     IntRect newBounds = m_autofillPopup->frameRect();
2397     // Let's resize the backing window if necessary.
2398     if (oldBounds != newBounds) {
2399         WebPopupMenuImpl* popupMenu =
2400             static_cast<WebPopupMenuImpl*>(m_autofillPopup->client());
2401         if (popupMenu)
2402             popupMenu->client()->setWindowRect(m_chromeClientImpl.windowToScreen(newBounds));
2403     }
2404 }
2405
2406 Node* WebViewImpl::focusedWebCoreNode()
2407 {
2408     Frame* frame = m_page->focusController()->focusedFrame();
2409     if (!frame)
2410         return 0;
2411
2412     Document* document = frame->document();
2413     if (!document)
2414         return 0;
2415
2416     return document->focusedNode();
2417 }
2418
2419 HitTestResult WebViewImpl::hitTestResultForWindowPos(const IntPoint& pos)
2420 {
2421     IntPoint docPoint(m_page->mainFrame()->view()->windowToContents(pos));
2422     return m_page->mainFrame()->eventHandler()->hitTestResultAtPoint(docPoint, false);
2423 }
2424
2425 void WebViewImpl::setTabsToLinks(bool enable)
2426 {
2427     m_tabsToLinks = enable;
2428 }
2429
2430 bool WebViewImpl::tabsToLinks() const
2431 {
2432     return m_tabsToLinks;
2433 }
2434
2435 #if USE(ACCELERATED_COMPOSITING)
2436 bool WebViewImpl::allowsAcceleratedCompositing()
2437 {
2438     return !m_compositorCreationFailed;
2439 }
2440
2441 bool WebViewImpl::pageHasRTLStyle() const
2442 {
2443     if (!page())
2444         return false;
2445     Document* document = page()->mainFrame()->document();
2446     if (!document)
2447         return false;
2448     RenderView* renderView = document->renderView();
2449     if (!renderView)
2450         return false;
2451     RenderStyle* style = renderView->style();
2452     if (!style)
2453         return false;
2454     return (style->direction() == RTL);
2455 }
2456
2457 void WebViewImpl::setRootGraphicsLayer(WebCore::GraphicsLayer* layer)
2458 {
2459     m_rootGraphicsLayer = layer;
2460     setRootPlatformLayer(layer ? layer->platformLayer() : 0);
2461 }
2462
2463 void WebViewImpl::setRootPlatformLayer(WebCore::PlatformLayer* layer)
2464 {
2465     setIsAcceleratedCompositingActive(layer);
2466     if (m_layerTreeHost)
2467         m_layerTreeHost->setRootLayer(layer);
2468
2469     IntRect damagedRect(0, 0, m_size.width, m_size.height);
2470     if (m_isAcceleratedCompositingActive)
2471         invalidateRootLayerRect(damagedRect);
2472     else
2473         m_client->didInvalidateRect(damagedRect);
2474 }
2475
2476 void WebViewImpl::setRootLayerNeedsDisplay()
2477 {
2478 #if USE(THREADED_COMPOSITING)
2479     if (m_layerTreeHost)
2480         m_layerTreeHost->setNeedsCommitAndRedraw();
2481 #else
2482     m_client->scheduleComposite();
2483 #endif
2484 }
2485
2486 void WebViewImpl::scrollRootLayerRect(const IntSize& scrollDelta, const IntRect& clipRect)
2487 {
2488     updateLayerTreeViewport();
2489     setRootLayerNeedsDisplay();
2490 }
2491
2492 void WebViewImpl::invalidateRootLayerRect(const IntRect& rect)
2493 {
2494     ASSERT(m_layerTreeHost);
2495
2496     if (!page())
2497         return;
2498
2499     FrameView* view = page()->mainFrame()->view();
2500     IntRect dirtyRect = view->windowToContents(rect);
2501     updateLayerTreeViewport();
2502     m_layerTreeHost->invalidateRootLayerRect(dirtyRect);
2503     setRootLayerNeedsDisplay();
2504 }
2505
2506 class WebViewImplContentPainter : public LayerPainterChromium {
2507     WTF_MAKE_NONCOPYABLE(WebViewImplContentPainter);
2508 public:
2509     static PassOwnPtr<WebViewImplContentPainter*> create(WebViewImpl* webViewImpl)
2510     {
2511         return adoptPtr(new WebViewImplContentPainter(webViewImpl));
2512     }
2513
2514     virtual void paint(GraphicsContext& context, const IntRect& contentRect)
2515     {
2516         double paintStart = currentTime();
2517         Page* page = m_webViewImpl->page();
2518         if (!page)
2519             return;
2520         FrameView* view = page->mainFrame()->view();
2521         view->paintContents(&context, contentRect);
2522         double paintEnd = currentTime();
2523         double pixelsPerSec = (contentRect.width() * contentRect.height()) / (paintEnd - paintStart);
2524         PlatformBridge::histogramCustomCounts("Renderer4.AccelRootPaintDurationMS", (paintEnd - paintStart) * 1000, 0, 120, 30);
2525         PlatformBridge::histogramCustomCounts("Renderer4.AccelRootPaintMegapixPerSecond", pixelsPerSec / 1000000, 10, 210, 30);
2526     }
2527
2528 private:
2529     explicit WebViewImplContentPainter(WebViewImpl* webViewImpl)
2530         : m_webViewImpl(webViewImpl)
2531     {
2532     }
2533
2534     WebViewImpl* m_webViewImpl;
2535 };
2536
2537 void WebViewImpl::setIsAcceleratedCompositingActive(bool active)
2538 {
2539     PlatformBridge::histogramEnumeration("GPU.setIsAcceleratedCompositingActive", active * 2 + m_isAcceleratedCompositingActive, 4);
2540
2541     if (m_isAcceleratedCompositingActive == active)
2542         return;
2543
2544     if (!active) {
2545         m_isAcceleratedCompositingActive = false;
2546         // We need to finish all GL rendering before sending
2547         // didActivateAcceleratedCompositing(false) to prevent
2548         // flickering when compositing turns off.
2549         if (m_layerTreeHost)
2550             m_layerTreeHost->finishAllRendering();
2551         m_client->didActivateAcceleratedCompositing(false);
2552     } else if (m_layerTreeHost) {
2553         m_isAcceleratedCompositingActive = true;
2554         updateLayerTreeViewport();
2555
2556         m_client->didActivateAcceleratedCompositing(true);
2557     } else {
2558         TRACE_EVENT("WebViewImpl::setIsAcceleratedCompositingActive(true)", this, 0);
2559
2560         WebCore::CCSettings ccSettings;
2561         ccSettings.acceleratePainting = page()->settings()->acceleratedDrawingEnabled();
2562         ccSettings.compositeOffscreen = settings()->compositeToTextureEnabled();
2563         ccSettings.showFPSCounter = settings()->showFPSCounter();
2564         ccSettings.showPlatformLayerTree = settings()->showPlatformLayerTree();
2565
2566         m_layerTreeHost = CCLayerTreeHost::create(this, ccSettings);
2567         if (m_layerTreeHost) {
2568             m_client->didActivateAcceleratedCompositing(true);
2569             m_isAcceleratedCompositingActive = true;
2570             m_compositorCreationFailed = false;
2571             if (m_pageOverlay)
2572                 m_pageOverlay->update();
2573         } else {
2574             m_isAcceleratedCompositingActive = false;
2575             m_client->didActivateAcceleratedCompositing(false);
2576             m_compositorCreationFailed = true;
2577         }
2578     }
2579     if (page())
2580         page()->mainFrame()->view()->setClipsRepaints(!m_isAcceleratedCompositingActive);
2581 }
2582
2583 #endif
2584
2585 PassRefPtr<GraphicsContext3D> WebViewImpl::createLayerTreeHostContext3D()
2586 {
2587     RefPtr<GraphicsContext3D> context = m_temporaryOnscreenGraphicsContext3D.release();
2588     if (!context) {
2589         context = GraphicsContext3D::create(getCompositorContextAttributes(), m_page->chrome(), GraphicsContext3D::RenderDirectlyToHostWindow);
2590         if (context)
2591             context->reshape(max(1, m_size.width), max(1, m_size.height));
2592     }
2593     return context;
2594 }
2595
2596 PassOwnPtr<LayerPainterChromium> WebViewImpl::createRootLayerPainter()
2597 {
2598     return WebViewImplContentPainter::create(this);
2599 }
2600
2601 void WebViewImpl::animateAndLayout(double frameBeginTime)
2602 {
2603     animate(frameBeginTime);
2604     layout();
2605 }
2606
2607 void WebViewImpl::didRecreateGraphicsContext(bool success)
2608 {
2609     setRootPlatformLayer(success ? m_layerTreeHost->rootLayer() : 0);
2610
2611     if (success) {
2612       // Forces ViewHostMsg_DidActivateAcceleratedCompositing to be sent so
2613       // that the browser process can reacquire surfaces.
2614       m_client->didActivateAcceleratedCompositing(true);
2615       if (m_pageOverlay)
2616           m_pageOverlay->update();
2617     }
2618 }
2619
2620 #if !USE(THREADED_COMPOSITING)
2621 void WebViewImpl::scheduleComposite()
2622 {
2623     m_client->scheduleComposite();
2624 }
2625 #endif
2626
2627 void WebViewImpl::updateLayerTreeViewport()
2628 {
2629     if (!page())
2630         return;
2631
2632     FrameView* view = page()->mainFrame()->view();
2633     IntRect contentRect = view->visibleContentRect(false);
2634     IntRect visibleRect = view->visibleContentRect(true);
2635     IntPoint scroll(view->scrollX(), view->scrollY());
2636
2637     m_layerTreeHost->setViewport(visibleRect, contentRect, scroll);
2638 }
2639
2640 WebGraphicsContext3D* WebViewImpl::graphicsContext3D()
2641 {
2642 #if USE(ACCELERATED_COMPOSITING)
2643     if (m_page->settings()->acceleratedCompositingEnabled() && allowsAcceleratedCompositing()) {
2644         if (m_layerTreeHost) {
2645             WebGraphicsContext3D* webContext = GraphicsContext3DInternal::extractWebGraphicsContext3D(m_layerTreeHost->context());
2646             if (webContext && !webContext->isContextLost())
2647                 return webContext;
2648         }
2649         if (m_temporaryOnscreenGraphicsContext3D) {
2650             WebGraphicsContext3D* webContext = GraphicsContext3DInternal::extractWebGraphicsContext3D(m_temporaryOnscreenGraphicsContext3D.get());
2651             if (webContext && !webContext->isContextLost())
2652                 return webContext;
2653         }
2654         m_temporaryOnscreenGraphicsContext3D = GraphicsContext3D::create(getCompositorContextAttributes(), m_page->chrome(), GraphicsContext3D::RenderDirectlyToHostWindow);
2655         if (m_temporaryOnscreenGraphicsContext3D)
2656             m_temporaryOnscreenGraphicsContext3D->reshape(max(1, m_size.width), max(1, m_size.height));
2657         return GraphicsContext3DInternal::extractWebGraphicsContext3D(m_temporaryOnscreenGraphicsContext3D.get());
2658     }
2659 #endif
2660     return 0;
2661 }
2662
2663
2664 void WebViewImpl::setVisibilityState(WebPageVisibilityState visibilityState,
2665                                      bool isInitialState) {
2666     if (!page())
2667         return;
2668
2669 #if ENABLE(PAGE_VISIBILITY_API)
2670     ASSERT(visibilityState == WebPageVisibilityStateVisible
2671            || visibilityState == WebPageVisibilityStateHidden
2672            || visibilityState == WebPageVisibilityStatePrerender);
2673     m_page->setVisibilityState(static_cast<PageVisibilityState>(static_cast<int>(visibilityState)), isInitialState);
2674 #endif
2675
2676 #if USE(ACCELERATED_COMPOSITING)
2677     if (isAcceleratedCompositingActive())
2678         m_layerTreeHost->setVisible(visibilityState == WebPageVisibilityStateVisible);
2679 #endif
2680 }
2681
2682 #if ENABLE(GESTURE_RECOGNIZER)
2683 void WebViewImpl::resetGestureRecognizer()
2684 {
2685     m_gestureRecognizer->reset();
2686 }
2687 #endif
2688
2689
2690 } // namespace WebKit