Implement disambiguation popup

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index 9639d2e26bfe224a2b7b8d9130b0872ba12da9c4..5508609b9dd579bbc64a942319ccbc72f45d972c 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -66,6 +66,7 @@
 #include "content/renderer/browser_plugin/old/guest_to_embedder_channel.h"
 #include "content/renderer/device_orientation_dispatcher.h"
 #include "content/renderer/devtools_agent.h"
+#include "content/renderer/disambiguation_popup_helper.h"
 #include "content/renderer/dom_automation_controller.h"
 #include "content/renderer/dom_storage/webstoragenamespace_impl.h"
 #include "content/renderer/external_popup_menu.h"
@@ -1046,6 +1047,8 @@ bool RenderViewImpl::OnMessageReceived(const IPC::Message& message) {
     IPC_MESSAGE_HANDLER(JavaBridgeMsg_Init, OnJavaBridgeInit)
     IPC_MESSAGE_HANDLER(ViewMsg_SetAccessibilityMode, OnSetAccessibilityMode)
     IPC_MESSAGE_HANDLER(ViewMsg_UpdateFrameTree, OnUpdatedFrameTree)
+    IPC_MESSAGE_HANDLER(ViewMsg_ReleaseDisambiguationPopupDIB,
+                        OnReleaseDisambiguationPopupDIB)
 
     // Have the super handle all other messages.
     IPC_MESSAGE_UNHANDLED(handled = RenderWidget::OnMessageReceived(message))
@@ -6052,3 +6055,42 @@ void RenderViewImpl::OnUpdatedFrameTree(
 
   updating_frame_tree_ = false;
 }
+
+bool RenderViewImpl::multipleTargetsTapped(
+    const WebKit::WebGestureEvent& event,
+    const WebVector<WebRect>& target_rects) {
+  gfx::Rect zoom_rect;
+  float scale = DisambiguationPopupHelper::ComputeZoomAreaAndScaleFactor(
+      zoom_rect, event.boundingBox, target_rects, GetSize());
+  if (!scale)
+    return false;
+
+  gfx::Size canvas_size = zoom_rect.size();
+  canvas_size = canvas_size.Scale(scale);
+  TransportDIB* transport_dib = NULL;
+  {
+    scoped_ptr<skia::PlatformCanvas> canvas(
+        RenderProcess::current()->GetDrawingCanvas(&transport_dib,
+                                                   gfx::Rect(canvas_size)));
+    if (!canvas.get())
+      return false;
+
+    canvas->scale(scale, scale);
+
+    canvas->translate(-zoom_rect.x(), -zoom_rect.y());
+    webwidget_->paint(webkit_glue::ToWebCanvas(canvas.get()), zoom_rect,
+        WebWidget::ForceSoftwareRenderingAndIgnoreGPUResidentContent);
+  }
+  Send(new ViewHostMsg_ShowDisambiguationPopup(routing_id_,
+                                               zoom_rect,
+                                               canvas_size,
+                                               transport_dib->id()));
+
+  return true;
+}
+
+void RenderViewImpl::OnReleaseDisambiguationPopupDIB(
+    TransportDIB::Handle dib_handle) {
+  TransportDIB* dib = TransportDIB::CreateWithHandle(dib_handle);
+  RenderProcess::current()->ReleaseTransportDIB(dib);
+}