Tracking SelectionBounds for all RenderWidgets on the Browser Side (Aura Only)

content/browser/renderer_host/text_input_manager.cc

Index: content/browser/renderer_host/text_input_manager.cc
diff --git a/content/browser/renderer_host/text_input_manager.cc b/content/browser/renderer_host/text_input_manager.cc
index c80f3807a0452485b0435e9e3c5f2b024c7dcb05..354301b359c614261b9d2cfef5f53dd5f1c4e576 100644
--- a/content/browser/renderer_host/text_input_manager.cc
+++ b/content/browser/renderer_host/text_input_manager.cc
@@ -6,6 +6,7 @@
 
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 #include "content/browser/renderer_host/render_widget_host_view_base.h"
+#include "content/common/view_messages.h"
 
 namespace content {
 
@@ -54,6 +55,14 @@ RenderWidgetHostImpl* TextInputManager::GetActiveWidget() const {
                         : nullptr;
 }
 
+gfx::Rect TextInputManager::GetSelectionBoundsRect() {
+  if (!active_view_)
+    return gfx::Rect();
+
+  return gfx::RectBetweenSelectionBounds(selection_anchor_map_[active_view_],
+                                         selection_focus_map_[active_view_]);
+}
+
 void TextInputManager::UpdateTextInputState(
     RenderWidgetHostViewBase* view,
     const TextInputState& text_input_state) {
@@ -78,6 +87,51 @@ void TextInputManager::UpdateTextInputState(
   NotifyObserversAboutInputStateUpdate(view, changed);
 }
 
+void TextInputManager::SelectionBoundsChanged(
+    RenderWidgetHostViewBase* view,
+    const ViewHostMsg_SelectionBounds_Params& params) {
+  DCHECK(IsRegistered(view));
+
+  gfx::SelectionBound anchor_bound, focus_bound;
+  anchor_bound.SetEdge(gfx::PointF(params.anchor_rect.origin()),
+                       gfx::PointF(params.anchor_rect.bottom_left()));
+  focus_bound.SetEdge(gfx::PointF(params.focus_rect.origin()),
+                      gfx::PointF(params.focus_rect.bottom_left()));
+
+  if (params.anchor_rect == params.focus_rect) {
+    anchor_bound.set_type(gfx::SelectionBound::CENTER);
+    focus_bound.set_type(gfx::SelectionBound::CENTER);
+  } else {
+    // Whether text is LTR at the anchor handle.
+    bool anchor_LTR = params.anchor_dir == blink::WebTextDirectionLeftToRight;
+    // Whether text is LTR at the focus handle.
+    bool focus_LTR = params.focus_dir == blink::WebTextDirectionLeftToRight;
+
+    if ((params.is_anchor_first && anchor_LTR) ||
+        (!params.is_anchor_first && !anchor_LTR)) {
+      anchor_bound.set_type(gfx::SelectionBound::LEFT);
+    } else {
+      anchor_bound.set_type(gfx::SelectionBound::RIGHT);
+    }
+    if ((params.is_anchor_first && focus_LTR) ||
+        (!params.is_anchor_first && !focus_LTR)) {
+      focus_bound.set_type(gfx::SelectionBound::RIGHT);
+    } else {
+      focus_bound.set_type(gfx::SelectionBound::LEFT);
+    }
+  }
+
+  if (anchor_bound == selection_anchor_map_[view] &&
+      focus_bound == selection_focus_map_[view])
+    return;
+
+  selection_anchor_map_[view] = anchor_bound;
+  selection_focus_map_[view] = focus_bound;
+
+  FOR_EACH_OBSERVER(Observer, observer_list_,
+                    OnSelectionBoundsChanged(this, view));
+}
+
 void TextInputManager::Register(RenderWidgetHostViewBase* view) {
   DCHECK(!IsRegistered(view));