Support InputMethodManager#updateCursorAnchorInfo for Android 5.0 (C++ version)

content/browser/renderer_host/render_widget_host_view_android.cc

Index: content/browser/renderer_host/render_widget_host_view_android.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_android.cc b/content/browser/renderer_host/render_widget_host_view_android.cc
index 7aa1ef1d6cd6c4e299354cbb3aab5464cf0089ba..df51f54e0f291fe4f39da4ebada65d57a180f288 100644
--- a/content/browser/renderer_host/render_widget_host_view_android.cc
+++ b/content/browser/renderer_host/render_widget_host_view_android.cc
@@ -72,6 +72,8 @@
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "ui/base/android/window_android.h"
 #include "ui/base/android/window_android_compositor.h"
+#include "ui/base/ime/android/cursor_anchor_info_builder.h"
+#include "ui/base/ime/android/cursor_anchor_info_controller.h"
 #include "ui/events/gesture_detection/gesture_provider_config_helper.h"
 #include "ui/events/gesture_detection/motion_event.h"
 #include "ui/gfx/android/device_display_info.h"
@@ -333,6 +335,8 @@ RenderWidgetHostViewAndroid::RenderWidgetHostViewAndroid(
       is_showing_(!widget_host->is_hidden()),
       content_view_core_(NULL),
       ime_adapter_android_(this),
+      cursor_anchor_info_controller_(
+          ui::CursorAnchorInfoController::Create(this)),
       cached_background_color_(SK_ColorWHITE),
       last_output_surface_id_(kUndefinedOutputSurfaceId),
       gesture_provider_(CreateGestureProviderConfig(), this),
@@ -708,6 +712,15 @@ long RenderWidgetHostViewAndroid::GetNativeImeAdapter() {
   return reinterpret_cast<intptr_t>(&ime_adapter_android_);
 }
 
+bool RenderWidgetHostViewAndroid::RequestCursorUpdates(
+    uint32 cursor_update_mode) {
+  if (!cursor_anchor_info_controller_)
+    return false;
+
+  return cursor_anchor_info_controller_->OnRequestCursorUpdates(
+      cursor_update_mode);
+}
+
 void RenderWidgetHostViewAndroid::OnTextInputStateChanged(
     const ViewHostMsg_TextInputState_Params& params) {
   if (selection_controller_) {
@@ -735,6 +748,13 @@ void RenderWidgetHostViewAndroid::OnTextInputStateChanged(
       params.value, params.selection_start, params.selection_end,
       params.composition_start, params.composition_end,
       params.show_ime_if_needed, params.is_non_ime_change);
+
+  if (cursor_anchor_info_controller_) {
+    cursor_anchor_info_controller_->OnTextInputStateChanged(
+        base::UTF8ToUTF16(params.value),
+        gfx::Range(params.selection_start, params.selection_end),
+        gfx::Range(params.composition_start, params.composition_end));
+  }
 }
 
 void RenderWidgetHostViewAndroid::OnDidChangeBodyBackgroundColor(
@@ -840,11 +860,16 @@ void RenderWidgetHostViewAndroid::ImeCancelComposition() {
 void RenderWidgetHostViewAndroid::ImeCompositionRangeChanged(
     const gfx::Range& range,
     const std::vector<gfx::Rect>& character_bounds) {
-  // TODO(yukawa): Implement this.
+  if (cursor_anchor_info_controller_) {
+    cursor_anchor_info_controller_->OnCompositionRangeChanged(range,
+                                                              character_bounds);
+  }
 }
 
 void RenderWidgetHostViewAndroid::FocusedNodeChanged(bool is_editable_node) {
   ime_adapter_android_.FocusedNodeChanged(is_editable_node);
+  if (cursor_anchor_info_controller_)
+    cursor_anchor_info_controller_->OnFocusedNodeChanged(is_editable_node);
   if (selection_controller_)
     selection_controller_->OnSelectionEditable(is_editable_node);
 }
@@ -1022,6 +1047,11 @@ void RenderWidgetHostViewAndroid::UnusedResourcesAreAvailable() {
   SendReturnedDelegatedResources(last_output_surface_id_);
 }
 
+void RenderWidgetHostViewAndroid::SendCursorAnchorInfo(
+    ui::CursorAnchorInfoBuilder* builder) {
+  ime_adapter_android_.UpdateCursorAnchorInfo(builder->Build());
+}
+
 void RenderWidgetHostViewAndroid::DestroyDelegatedContent() {
   RemoveLayers();
   frame_provider_ = NULL;
@@ -1346,6 +1376,11 @@ void RenderWidgetHostViewAndroid::OnFrameMetadataUpdated(
       web_contents_impl->media_web_contents_observer()->OnFrameInfoUpdated();
   }
 #endif  // defined(VIDEO_HOLE)
+
+  if (cursor_anchor_info_controller_) {
+    cursor_anchor_info_controller_->OnFrameMetadataUpdated(
+        frame_metadata, content_view_core_->GetLocationOnScreen());
+  }
 }
 
 void RenderWidgetHostViewAndroid::AcceleratedSurfaceInitialized(int route_id) {