Support dragging texts into Android WebView.

content/browser/android/content_view_core_impl.cc

 // Copyright 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/android/content_view_core_impl.h"
 
 #include <stddef.h>
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
@@ skipping 36 matching lines @@
 #include "content/public/browser/ssl_host_state_delegate.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/content_client.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/menu_item.h"
 #include "content/public/common/user_agent.h"
 #include "jni/ContentViewCore_jni.h"
 #include "third_party/WebKit/public/web/WebInputEvent.h"
 #include "ui/android/view_android.h"
 #include "ui/android/window_android.h"
+#include "ui/base/dragdrop/drop_target_event.h"
+#include "ui/base/dragdrop/os_exchange_data_provider_android.h"
 #include "ui/events/android/motion_event_android.h"
 #include "ui/gfx/android/java_bitmap.h"
 #include "ui/gfx/geometry/point_conversions.h"
 #include "ui/gfx/geometry/size_conversions.h"
 #include "ui/gfx/geometry/size_f.h"
 
 using base::android::AttachCurrentThread;
 using base::android::ConvertJavaStringToUTF16;
 using base::android::ConvertJavaStringToUTF8;
 using base::android::ConvertUTF16ToJavaString;
@@ skipping 1335 matching lines @@
                                               const JavaParamRef<jobject>& jobj,
                                               jboolean opaque) {
   if (GetRenderWidgetHostViewAndroid()) {
     if (opaque)
       GetRenderWidgetHostViewAndroid()->SetBackgroundColorToDefault();
     else
       GetRenderWidgetHostViewAndroid()->SetBackgroundColor(SK_ColorTRANSPARENT);
   }
 }
 
+void ContentViewCoreImpl::OnDragEntered(
+    JNIEnv* env,
+    const base::android::JavaParamRef<jobject>& jobj,
+    int x,
+    int y,
+    int screen_x,
+    int screen_y) {
+  WebContentsViewAndroid* wcva = static_cast<WebContentsViewAndroid*>(
+      static_cast<WebContentsImpl*>(web_contents())->GetView());
+
+  ui::OSExchangeData data(new ui::OSExchangeDataProviderAndroid());
+  ui::DropTargetEvent event(
+      data, gfx::Point(x, y), gfx::Point(screen_x, screen_y),
+      ui::DragDropTypes::DRAG_COPY);  // Android drag and drop does only copy.
+
+  wcva->OnDragEntered(event);
+}
+
+void ContentViewCoreImpl::OnDragUpdated(
+    JNIEnv* env,
+    const base::android::JavaParamRef<jobject>& jobj,
+    int x,
+    int y,
+    int screen_x,
+    int screen_y) {
+  WebContentsViewAndroid* wcva = static_cast<WebContentsViewAndroid*>(
+      static_cast<WebContentsImpl*>(web_contents())->GetView());
+
+  ui::OSExchangeData data(new ui::OSExchangeDataProviderAndroid());
+  ui::DropTargetEvent event(
+      data, gfx::Point(x, y), gfx::Point(screen_x, screen_y),
+      ui::DragDropTypes::DRAG_COPY);  // Android drag and drop does only copy.
+
+  wcva->OnDragUpdated(event);
+}
+
+void ContentViewCoreImpl::OnPerformDrop(
+    JNIEnv* env,
+    const base::android::JavaParamRef<jobject>& jobj,
+    int x,
+    int y,
+    int screen_x,
+    int screen_y,
+    const base::android::JavaParamRef<jstring>& content) {
+  base::string16 text_to_drop = ConvertJavaStringToUTF16(env, content);
+
+  WebContentsViewAndroid* wcva = static_cast<WebContentsViewAndroid*>(
+      static_cast<WebContentsImpl*>(web_contents())->GetView());
+
+  ui::OSExchangeData data(new ui::OSExchangeDataProviderAndroid());
+  data.SetString(text_to_drop);
+  ui::DropTargetEvent event(data, gfx::Point(x, y),
+                            gfx::Point(screen_x, screen_y),
+                            ui::DragDropTypes::DRAG_COPY);
+
+  wcva->OnPerformDrop(event);
+}
+
+void ContentViewCoreImpl::OnDragExited(
+    JNIEnv* env,
+    const base::android::JavaParamRef<jobject>& jobj) {
+  WebContentsViewAndroid* wcva = static_cast<WebContentsViewAndroid*>(
+      static_cast<WebContentsImpl*>(web_contents())->GetView());
+  wcva->OnDragExited();
+}
+
 void ContentViewCoreImpl::RequestTextSurroundingSelection(
     int max_length,
     const base::Callback<
         void(const base::string16& content, int start_offset, int end_offset)>&
         callback) {
   DCHECK(!callback.is_null());
   RenderFrameHost* focused_frame = web_contents_->GetFocusedFrame();
   if (!focused_frame)
     return;
   if (GetRenderWidgetHostViewAndroid()) {
@@ skipping 99 matching lines @@
     return ScopedJavaLocalRef<jobject>();
 
   return view->GetJavaObject();
 }
 
 bool RegisterContentViewCore(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace content