Add an interface to gather text surrounding the selection.

This CL is dependent on 292113008 and its dependencies.

BUG=371596, 355154

Review URL: https://codereview.chromium.org/322203002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@278693 0039d316-1c4b-4281-b951-d872f2087c98

content/browser/android/content_view_core_impl.cc

@@ -37,6 +37,7 @@
 #include "content/browser/screen_orientation/screen_orientation_dispatcher_host.h"
 #include "content/browser/ssl/ssl_host_state.h"
 #include "content/browser/web_contents/web_contents_view_android.h"
+#include "content/common/frame_messages.h"
 #include "content/common/input/web_input_event_traits.h"
 #include "content/common/input_messages.h"
 #include "content/common/view_messages.h"
@@ -1572,6 +1573,23 @@ void ContentViewCoreImpl::SetBackgroundOpaque(JNIEnv* env, jobject jobj,
     GetRenderWidgetHostViewAndroid()->SetBackgroundOpaque(opaque);
 }
 
+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()) {
+    GetRenderWidgetHostViewAndroid()->SetTextSurroundingSelectionCallback(
+        callback);
+    focused_frame->Send(new FrameMsg_TextSurroundingSelectionRequest(
+        focused_frame->GetRoutingID(), max_length));
+  }
+}
+
 void ContentViewCoreImpl::OnSmartClipDataExtracted(
     const base::string16& result) {
   JNIEnv* env = AttachCurrentThread();

content/browser/android/content_view_core_impl.h

@@ -9,7 +9,6 @@
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_weak_ref.h"
-#include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/i18n/rtl.h"
 #include "base/memory/scoped_ptr.h"
@@ -62,6 +61,11 @@ class ContentViewCoreImpl : public ContentViewCore,
   virtual float GetDpiScale() const OVERRIDE;
   virtual void PauseVideo() OVERRIDE;
   virtual void PauseOrResumeGeolocation(bool should_pause) OVERRIDE;
+  virtual void RequestTextSurroundingSelection(
+      int max_length,
+      const base::Callback<void(const base::string16& content,
+                                int start_offset,
+                                int end_offset)>& callback) OVERRIDE;
 
   // --------------------------------------------------------------------------
   // Methods called from Java via JNI

content/browser/renderer_host/render_widget_host_view_android.cc

@@ -433,10 +433,21 @@ void RenderWidgetHostViewAndroid::UnlockCompositingSurface() {
   }
 }
 
+void RenderWidgetHostViewAndroid::SetTextSurroundingSelectionCallback(
+    const TextSurroundingSelectionCallback& callback) {
+  // Only one outstanding request is allowed at any given time.
+  DCHECK(!callback.is_null());
+  text_surrounding_selection_callback_ = callback;
+}
+
 void RenderWidgetHostViewAndroid::OnTextSurroundingSelectionResponse(
     const base::string16& content,
     size_t start_offset,
     size_t end_offset) {
+  if (text_surrounding_selection_callback_.is_null())
+    return;
+  text_surrounding_selection_callback_.Run(content, start_offset, end_offset);
+  text_surrounding_selection_callback_.Reset();
 }
 
 void RenderWidgetHostViewAndroid::ReleaseLocksOnSurface() {

content/browser/renderer_host/render_widget_host_view_android.h

@@ -224,6 +224,12 @@ class CONTENT_EXPORT RenderWidgetHostViewAndroid
 
   void SetOverlayVideoMode(bool enabled);
 
+  typedef base::Callback<
+      void(const base::string16& content, int start_offset, int end_offset)>
+      TextSurroundingSelectionCallback;
+  void SetTextSurroundingSelectionCallback(
+      const TextSurroundingSelectionCallback& callback);
+
  private:
   void RunAckCallbacks();
 
@@ -283,7 +289,6 @@ class CONTENT_EXPORT RenderWidgetHostViewAndroid
   void SetNeedsAnimate();
   bool Animate(base::TimeTicks frame_time);
 
-
   // The model object.
   RenderWidgetHostImpl* host_;
 
@@ -353,6 +358,8 @@ class CONTENT_EXPORT RenderWidgetHostViewAndroid
 
   scoped_ptr<LastFrameInfo> last_frame_info_;
 
+  TextSurroundingSelectionCallback text_surrounding_selection_callback_;
+
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewAndroid);
 };
 

content/public/browser/android/content_view_core.h

@@ -68,6 +68,13 @@ class CONTENT_EXPORT ContentViewCore {
       const gfx::Vector2dF& scroll_offset,
       float page_scale_factor)> UpdateFrameInfoCallback;
 
+  // Text surrounding selection.
+  virtual void RequestTextSurroundingSelection(
+      int max_length,
+      const base::Callback<void(const base::string16& content,
+                                int start_offset,
+                                int end_offset)>& callback) = 0;
+
  protected:
   virtual ~ContentViewCore() {};
 };