Support dragging texts into Android WebView.

content/browser/web_contents/web_contents_view_android.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/web_contents/web_contents_view_android.h"
 
 #include "base/logging.h"
 #include "content/browser/android/content_view_core_impl.h"
 #include "content/browser/frame_host/interstitial_page_impl.h"
 #include "content/browser/renderer_host/render_widget_host_view_android.h"
 #include "content/browser/renderer_host/render_view_host_factory.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/public/browser/render_widget_host.h"
 #include "content/public/browser/web_contents_delegate.h"
+#include "content/public/common/drop_data.h"
 
 namespace content {
+
 WebContentsView* CreateWebContentsView(
     WebContentsImpl* web_contents,
     WebContentsViewDelegate* delegate,
     RenderViewHostDelegateView** render_view_host_delegate_view) {
   WebContentsViewAndroid* rv = new WebContentsViewAndroid(
       web_contents, delegate);
   *render_view_host_delegate_view = rv;
   return rv;
 }
 
@@ skipping 164 matching lines @@
     const gfx::ImageSkia& image,
     const gfx::Vector2d& image_offset,
     const DragEventSourceInfo& event_info) {
   NOTIMPLEMENTED();
 }
 
 void WebContentsViewAndroid::UpdateDragCursor(blink::WebDragOperation op) {
   NOTIMPLEMENTED();
 }
 
+void WebContentsViewAndroid::OnDragEntered(
+    const std::vector<DropData::Metadata>& metadata,
+    std::vector<int> locations) {
+  const gfx::Point location(locations[0], locations[1]);
+  const gfx::Point screen_location(locations[2], locations[3]);
+
+  web_contents_->GetRenderViewHost()->DragTargetDragEnterWithMetaData(
+      metadata, location, screen_location, blink::WebDragOperationCopy, 0);
+}
+void WebContentsViewAndroid::OnDragUpdated(std::vector<int> locations) {
+  const gfx::Point location(locations[0], locations[1]);
+  const gfx::Point screen_location(locations[2], locations[3]);
+
+  web_contents_->GetRenderViewHost()->DragTargetDragOver(
+      location, screen_location, blink::WebDragOperationCopy, 0);
+}
+
+void WebContentsViewAndroid::OnDragExited() {
+  web_contents_->GetRenderViewHost()->DragTargetDragLeave();
+}
+
+void WebContentsViewAndroid::OnPerformDrop(DropData& drop_data,
+                                           std::vector<int> locations) {
+  const gfx::Point location(locations[0], locations[1]);
+  const gfx::Point screen_location(locations[2], locations[3]);
+
+  web_contents_->GetRenderViewHost()->FilterDropData(&drop_data);
+  web_contents_->GetRenderViewHost()->DragTargetDrop(drop_data, location,
+                                                     screen_location, 0);
+}
+
 void WebContentsViewAndroid::GotFocus() {
   // This is only used in the views FocusManager stuff but it bleeds through
   // all subclasses. http://crbug.com/21875
 }
 
 // This is called when we the renderer asks us to take focus back (i.e., it has
 // iterated past the last focusable element on the page).
 void WebContentsViewAndroid::TakeFocus(bool reverse) {
   if (web_contents_->GetDelegate() &&
       web_contents_->GetDelegate()->TakeFocus(web_contents_, reverse))
     return;
   web_contents_->GetRenderWidgetHostView()->Focus();
 }
 
 } // namespace content