content/renderer/render_widget_fullscreen_pepper.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/renderer/render_widget_fullscreen_pepper.h"
   6
   7 #include <vector>
   8
   9 #include "base/bind.h"
  10 #include "base/command_line.h"
  11 #include "base/message_loop/message_loop.h"
  12 #include "content/common/gpu/client/gpu_channel_host.h"
  13 #include "content/common/view_messages.h"
  14 #include "content/public/common/content_switches.h"
  15 #include "content/renderer/gpu/render_widget_compositor.h"
  16 #include "content/renderer/pepper/pepper_plugin_instance_impl.h"
  17 #include "content/renderer/render_thread_impl.h"
  18 #include "gpu/command_buffer/client/gles2_implementation.h"
  19 #include "skia/ext/platform_canvas.h"
  20 #include "third_party/WebKit/public/platform/WebCanvas.h"
  21 #include "third_party/WebKit/public/platform/WebCursorInfo.h"
  22 #include "third_party/WebKit/public/platform/WebGraphicsContext3D.h"
  23 #include "third_party/WebKit/public/platform/WebLayer.h"
  24 #include "third_party/WebKit/public/platform/WebSize.h"
  25 #include "third_party/WebKit/public/web/WebWidget.h"
  26 #include "ui/gfx/size_conversions.h"
  27 #include "ui/gl/gpu_preference.h"
  28
  29 using blink::WebCanvas;
  30 using blink::WebCompositionUnderline;
  31 using blink::WebCursorInfo;
  32 using blink::WebGestureEvent;
  33 using blink::WebInputEvent;
  34 using blink::WebMouseEvent;
  35 using blink::WebMouseWheelEvent;
  36 using blink::WebPoint;
  37 using blink::WebRect;
  38 using blink::WebSize;
  39 using blink::WebString;
  40 using blink::WebTextDirection;
  41 using blink::WebTextInputType;
  42 using blink::WebVector;
  43 using blink::WebWidget;
  44 using blink::WGC3Dintptr;
  45
  46 namespace content {
  47
  48 namespace {
  49
  50 class FullscreenMouseLockDispatcher : public MouseLockDispatcher {
  51  public:
  52   explicit FullscreenMouseLockDispatcher(RenderWidgetFullscreenPepper* widget);
  53   virtual ~FullscreenMouseLockDispatcher();
  54
  55  private:
  56   // MouseLockDispatcher implementation.
  57   virtual void SendLockMouseRequest(bool unlocked_by_target) OVERRIDE;
  58   virtual void SendUnlockMouseRequest() OVERRIDE;
  59
  60   RenderWidgetFullscreenPepper* widget_;
  61
  62   DISALLOW_COPY_AND_ASSIGN(FullscreenMouseLockDispatcher);
  63 };
  64
  65 WebMouseEvent WebMouseEventFromGestureEvent(const WebGestureEvent& gesture) {
  66   WebMouseEvent mouse;
  67
  68   switch (gesture.type) {
  69     case WebInputEvent::GestureScrollBegin:
  70       mouse.type = WebInputEvent::MouseDown;
  71       break;
  72
  73     case WebInputEvent::GestureScrollUpdate:
  74       mouse.type = WebInputEvent::MouseMove;
  75       break;
  76
  77     case WebInputEvent::GestureFlingStart:
  78       if (gesture.sourceDevice == blink::WebGestureDeviceTouchscreen) {
  79         // A scroll gesture on the touchscreen may end with a GestureScrollEnd
  80         // when there is no velocity, or a GestureFlingStart when it has a
  81         // velocity. In both cases, it should end the drag that was initiated by
  82         // the GestureScrollBegin (and subsequent GestureScrollUpdate) events.
  83         mouse.type = WebInputEvent::MouseUp;
  84         break;
  85       } else {
  86         return mouse;
  87       }
  88     case WebInputEvent::GestureScrollEnd:
  89       mouse.type = WebInputEvent::MouseUp;
  90       break;
  91
  92     default:
  93       break;
  94   }
  95
  96   if (mouse.type == WebInputEvent::Undefined)
  97     return mouse;
  98
  99   mouse.timeStampSeconds = gesture.timeStampSeconds;
 100   mouse.modifiers = gesture.modifiers | WebInputEvent::LeftButtonDown;
 101   mouse.button = WebMouseEvent::ButtonLeft;
 102   mouse.clickCount = (mouse.type == WebInputEvent::MouseDown ||
 103                       mouse.type == WebInputEvent::MouseUp);
 104
 105   mouse.x = gesture.x;
 106   mouse.y = gesture.y;
 107   mouse.windowX = gesture.globalX;
 108   mouse.windowY = gesture.globalY;
 109   mouse.globalX = gesture.globalX;
 110   mouse.globalY = gesture.globalY;
 111
 112   return mouse;
 113 }
 114
 115 FullscreenMouseLockDispatcher::FullscreenMouseLockDispatcher(
 116     RenderWidgetFullscreenPepper* widget) : widget_(widget) {
 117 }
 118
 119 FullscreenMouseLockDispatcher::~FullscreenMouseLockDispatcher() {
 120 }
 121
 122 void FullscreenMouseLockDispatcher::SendLockMouseRequest(
 123     bool unlocked_by_target) {
 124   widget_->Send(new ViewHostMsg_LockMouse(widget_->routing_id(), false,
 125                                           unlocked_by_target, true));
 126 }
 127
 128 void FullscreenMouseLockDispatcher::SendUnlockMouseRequest() {
 129   widget_->Send(new ViewHostMsg_UnlockMouse(widget_->routing_id()));
 130 }
 131
 132 // WebWidget that simply wraps the pepper plugin.
 133 // TODO(piman): figure out IME and implement setComposition and friends if
 134 // necessary.
 135 class PepperWidget : public WebWidget {
 136  public:
 137   explicit PepperWidget(RenderWidgetFullscreenPepper* widget)
 138       : widget_(widget) {
 139   }
 140
 141   virtual ~PepperWidget() {}
 142
 143   // WebWidget API
 144   virtual void close() {
 145     delete this;
 146   }
 147
 148   virtual WebSize size() {
 149     return size_;
 150   }
 151
 152   virtual void resize(const WebSize& size) {
 153     if (!widget_->plugin())
 154       return;
 155
 156     size_ = size;
 157     WebRect plugin_rect(0, 0, size_.width, size_.height);
 158     widget_->plugin()->ViewChanged(plugin_rect, plugin_rect,
 159                                    std::vector<gfx::Rect>());
 160     widget_->Invalidate();
 161   }
 162
 163   virtual void themeChanged() {
 164     NOTIMPLEMENTED();
 165   }
 166
 167   virtual bool handleInputEvent(const WebInputEvent& event) {
 168     if (!widget_->plugin())
 169       return false;
 170
 171     // This cursor info is ignored, we always set the cursor directly from
 172     // RenderWidgetFullscreenPepper::DidChangeCursor.
 173     WebCursorInfo cursor;
 174
 175     // Pepper plugins do not accept gesture events. So do not send the gesture
 176     // events directly to the plugin. Instead, try to convert them to equivalent
 177     // mouse events, and then send to the plugin.
 178     if (WebInputEvent::isGestureEventType(event.type)) {
 179       bool result = false;
 180       const WebGestureEvent* gesture_event =
 181           static_cast<const WebGestureEvent*>(&event);
 182       switch (event.type) {
 183         case WebInputEvent::GestureTap: {
 184           WebMouseEvent mouse;
 185
 186           mouse.timeStampSeconds = gesture_event->timeStampSeconds;
 187           mouse.type = WebInputEvent::MouseMove;
 188           mouse.modifiers = gesture_event->modifiers;
 189
 190           mouse.x = gesture_event->x;
 191           mouse.y = gesture_event->y;
 192           mouse.windowX = gesture_event->globalX;
 193           mouse.windowY = gesture_event->globalY;
 194           mouse.globalX = gesture_event->globalX;
 195           mouse.globalY = gesture_event->globalY;
 196           mouse.movementX = 0;
 197           mouse.movementY = 0;
 198           result |= widget_->plugin()->HandleInputEvent(mouse, &cursor);
 199
 200           mouse.type = WebInputEvent::MouseDown;
 201           mouse.button = WebMouseEvent::ButtonLeft;
 202           mouse.clickCount = gesture_event->data.tap.tapCount;
 203           result |= widget_->plugin()->HandleInputEvent(mouse, &cursor);
 204
 205           mouse.type = WebInputEvent::MouseUp;
 206           result |= widget_->plugin()->HandleInputEvent(mouse, &cursor);
 207           break;
 208         }
 209
 210         default: {
 211           WebMouseEvent mouse = WebMouseEventFromGestureEvent(*gesture_event);
 212           if (mouse.type != WebInputEvent::Undefined)
 213             result |= widget_->plugin()->HandleInputEvent(mouse, &cursor);
 214           break;
 215         }
 216       }
 217       return result;
 218     }
 219
 220     bool result = widget_->plugin()->HandleInputEvent(event, &cursor);
 221
 222     // For normal web pages, WebViewImpl does input event translations and
 223     // generates context menu events. Since we don't have a WebView, we need to
 224     // do the necessary translation ourselves.
 225     if (WebInputEvent::isMouseEventType(event.type)) {
 226       const WebMouseEvent& mouse_event =
 227           reinterpret_cast<const WebMouseEvent&>(event);
 228       bool send_context_menu_event = false;
 229       // On Mac/Linux, we handle it on mouse down.
 230       // On Windows, we handle it on mouse up.
 231 #if defined(OS_WIN)
 232       send_context_menu_event =
 233           mouse_event.type == WebInputEvent::MouseUp &&
 234           mouse_event.button == WebMouseEvent::ButtonRight;
 235 #elif defined(OS_MACOSX)
 236       send_context_menu_event =
 237           mouse_event.type == WebInputEvent::MouseDown &&
 238           (mouse_event.button == WebMouseEvent::ButtonRight ||
 239            (mouse_event.button == WebMouseEvent::ButtonLeft &&
 240             mouse_event.modifiers & WebMouseEvent::ControlKey));
 241 #else
 242       send_context_menu_event =
 243           mouse_event.type == WebInputEvent::MouseDown &&
 244           mouse_event.button == WebMouseEvent::ButtonRight;
 245 #endif
 246       if (send_context_menu_event) {
 247         WebMouseEvent context_menu_event(mouse_event);
 248         context_menu_event.type = WebInputEvent::ContextMenu;
 249         widget_->plugin()->HandleInputEvent(context_menu_event, &cursor);
 250       }
 251     }
 252     return result;
 253   }
 254
 255  private:
 256   RenderWidgetFullscreenPepper* widget_;
 257   WebSize size_;
 258
 259   DISALLOW_COPY_AND_ASSIGN(PepperWidget);
 260 };
 261
 262 }  // anonymous namespace
 263
 264 // static
 265 RenderWidgetFullscreenPepper* RenderWidgetFullscreenPepper::Create(
 266     int32 opener_id,
 267     PepperPluginInstanceImpl* plugin,
 268     const GURL& active_url,
 269     const blink::WebScreenInfo& screen_info) {
 270   DCHECK_NE(MSG_ROUTING_NONE, opener_id);
 271   scoped_refptr<RenderWidgetFullscreenPepper> widget(
 272       new RenderWidgetFullscreenPepper(plugin, active_url, screen_info));
 273   widget->Init(opener_id);
 274   widget->AddRef();
 275   return widget.get();
 276 }
 277
 278 RenderWidgetFullscreenPepper::RenderWidgetFullscreenPepper(
 279     PepperPluginInstanceImpl* plugin,
 280     const GURL& active_url,
 281     const blink::WebScreenInfo& screen_info)
 282     : RenderWidgetFullscreen(screen_info),
 283       active_url_(active_url),
 284       plugin_(plugin),
 285       layer_(NULL),
 286       mouse_lock_dispatcher_(new FullscreenMouseLockDispatcher(
 287           this)) {
 288 }
 289
 290 RenderWidgetFullscreenPepper::~RenderWidgetFullscreenPepper() {
 291 }
 292
 293 void RenderWidgetFullscreenPepper::Invalidate() {
 294   InvalidateRect(gfx::Rect(size_.width(), size_.height()));
 295 }
 296
 297 void RenderWidgetFullscreenPepper::InvalidateRect(const blink::WebRect& rect) {
 298   didInvalidateRect(rect);
 299 }
 300
 301 void RenderWidgetFullscreenPepper::ScrollRect(
 302     int dx, int dy, const blink::WebRect& rect) {
 303   didScrollRect(dx, dy, rect);
 304 }
 305
 306 void RenderWidgetFullscreenPepper::Destroy() {
 307   // This function is called by the plugin instance as it's going away, so reset
 308   // plugin_ to NULL to avoid calling into a dangling pointer e.g. on Close().
 309   plugin_ = NULL;
 310
 311   // After calling Destroy(), the plugin instance assumes that the layer is not
 312   // used by us anymore, so it may destroy the layer before this object goes
 313   // away.
 314   SetLayer(NULL);
 315
 316   Send(new ViewHostMsg_Close(routing_id_));
 317   Release();
 318 }
 319
 320 void RenderWidgetFullscreenPepper::DidChangeCursor(
 321     const blink::WebCursorInfo& cursor) {
 322   didChangeCursor(cursor);
 323 }
 324
 325 void RenderWidgetFullscreenPepper::SetLayer(blink::WebLayer* layer) {
 326   layer_ = layer;
 327   if (!layer_) {
 328     if (compositor_)
 329       compositor_->clearRootLayer();
 330     return;
 331   }
 332   if (!layerTreeView())
 333     initializeLayerTreeView();
 334   layer_->setBounds(blink::WebSize(size()));
 335   layer_->setDrawsContent(true);
 336   compositor_->setDeviceScaleFactor(device_scale_factor_);
 337   compositor_->setRootLayer(*layer_);
 338 }
 339
 340 bool RenderWidgetFullscreenPepper::OnMessageReceived(const IPC::Message& msg) {
 341   bool handled = true;
 342   IPC_BEGIN_MESSAGE_MAP(RenderWidgetFullscreenPepper, msg)
 343     IPC_MESSAGE_FORWARD(ViewMsg_LockMouse_ACK,
 344                         mouse_lock_dispatcher_.get(),
 345                         MouseLockDispatcher::OnLockMouseACK)
 346     IPC_MESSAGE_FORWARD(ViewMsg_MouseLockLost,
 347                         mouse_lock_dispatcher_.get(),
 348                         MouseLockDispatcher::OnMouseLockLost)
 349     IPC_MESSAGE_UNHANDLED(handled = false)
 350   IPC_END_MESSAGE_MAP()
 351   if (handled)
 352     return true;
 353
 354   return RenderWidgetFullscreen::OnMessageReceived(msg);
 355 }
 356
 357 void RenderWidgetFullscreenPepper::DidInitiatePaint() {
 358   if (plugin_)
 359     plugin_->ViewInitiatedPaint();
 360 }
 361
 362 void RenderWidgetFullscreenPepper::DidFlushPaint() {
 363   if (plugin_)
 364     plugin_->ViewFlushedPaint();
 365 }
 366
 367 void RenderWidgetFullscreenPepper::Close() {
 368   // If the fullscreen window is closed (e.g. user pressed escape), reset to
 369   // normal mode.
 370   if (plugin_)
 371     plugin_->FlashSetFullscreen(false, false);
 372
 373   // Call Close on the base class to destroy the WebWidget instance.
 374   RenderWidget::Close();
 375 }
 376
 377 void RenderWidgetFullscreenPepper::OnResize(
 378     const ViewMsg_Resize_Params& params) {
 379   if (layer_)
 380     layer_->setBounds(blink::WebSize(params.new_size));
 381   RenderWidget::OnResize(params);
 382 }
 383
 384 WebWidget* RenderWidgetFullscreenPepper::CreateWebWidget() {
 385   return new PepperWidget(this);
 386 }
 387
 388 GURL RenderWidgetFullscreenPepper::GetURLForGraphicsContext3D() {
 389   return active_url_;
 390 }
 391
 392 void RenderWidgetFullscreenPepper::SetDeviceScaleFactor(
 393     float device_scale_factor) {
 394   RenderWidget::SetDeviceScaleFactor(device_scale_factor);
 395   if (compositor_)
 396     compositor_->setDeviceScaleFactor(device_scale_factor);
 397 }
 398
 399 }  // namespace content