Browser Side Text Input State Tracking for OOPIF.

content/browser/renderer_host/render_widget_host_view_aura.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/renderer_host/render_widget_host_view_aura.h"
 
 #include <set>
 #include <utility>
 
 #include "base/auto_reset.h"
@@ skipping 443 matching lines @@
                                                    bool is_guest_view_hack)
     : host_(RenderWidgetHostImpl::From(host)),
       window_(nullptr),
       delegated_frame_host_(new DelegatedFrameHost(this)),
       in_shutdown_(false),
       in_bounds_changed_(false),
       is_fullscreen_(false),
       popup_parent_host_view_(NULL),
       popup_child_host_view_(NULL),
       is_loading_(false),
-      text_input_type_(ui::TEXT_INPUT_TYPE_NONE),
-      text_input_mode_(ui::TEXT_INPUT_MODE_DEFAULT),
-      text_input_flags_(0),
-      can_compose_inline_(true),
       has_composition_text_(false),
       accept_return_character_(false),
       last_swapped_software_frame_scale_factor_(1.f),
       paint_canvas_(NULL),
       synthetic_move_sent_(false),
       cursor_visibility_state_in_renderer_(UNKNOWN),
 #if defined(OS_WIN)
       legacy_render_widget_host_HWND_(NULL),
       legacy_window_destroyed_(false),
       showing_context_menu_(false),
@@ skipping 522 matching lines @@
       gfx::Screen::GetScreen()->GetDisplayNearestWindow(window_);
   current_cursor_.SetDisplayInfo(display);
   UpdateCursorIfOverSelf();
 }
 
 void RenderWidgetHostViewAura::SetIsLoading(bool is_loading) {
   is_loading_ = is_loading;
   UpdateCursorIfOverSelf();
 }
 
-void RenderWidgetHostViewAura::TextInputStateChanged(
-    const ViewHostMsg_TextInputState_Params& params) {
-  if (text_input_type_ != params.type ||
-      text_input_mode_ != params.mode ||
-      can_compose_inline_ != params.can_compose_inline ||
-      text_input_flags_ != params.flags) {
-    text_input_type_ = params.type;
-    text_input_mode_ = params.mode;
-    can_compose_inline_ = params.can_compose_inline;
-    text_input_flags_ = params.flags;
-    if (GetInputMethod())
-      GetInputMethod()->OnTextInputTypeChanged(this);
-  }
-  if (params.show_ime_if_needed && params.type != ui::TEXT_INPUT_TYPE_NONE) {
-    if (GetInputMethod())
-      GetInputMethod()->ShowImeIfNeeded();
-  }
+void RenderWidgetHostViewAura::UpdateTextInputState() {
+  RenderWidgetHostViewBase::UpdateTextInputState();
+
+  if (!GetInputMethod())
+    return;
+
+  GetInputMethod()->OnTextInputTypeChanged(this);

[Shu Chen, 2016/03/04 02:30:29]

The original logic notifies InputMethod only when there are state changes, while
this logics doesn't check the state changes. Is that intentional?

[EhsanK, 2016/03/04 09:31:49]

I actually removed that part due to this comment:
https://code.google.com/p/chromium/codesearch#chromium/src/content/renderer/r...
Which is technically true, but as I see now we only care about certain changes
in Aura and Mac.

I reverted the logic back to how it used to be but the change is in
RenderWidgetHostViewBase::TextInputStateChanged. We now early return if there
are no useful changes and this method never gets called.

[Shu Chen, 2016/03/04 09:57:45]

The original logic is:
  if (anything changed) {
    call OnTextInputTypeChanged(...);
  }
  if (show_ime_if_needed) {
    call ShowImeIfNeeded();
  }

Now your latest logic is:
  if (anything changed) {
    call OnTextInputTypeChanged(...);
    if (show_ime_if_needed) {
      call ShowImeIfNeeded();
    }
  }

Can you please revert to the original logic? Thanks

[EhsanK, 2016/03/08 05:21:03]

Thanks for the detailed explanation. I realize the error now. I made the fix
(hopefully correct and readable).

+
+  const TextInputState* state = current_text_input_state();
+  if (state->show_ime_if_needed && state->type != ui::TEXT_INPUT_TYPE_NONE)
+    GetInputMethod()->ShowImeIfNeeded();
 }
 
 void RenderWidgetHostViewAura::ImeCancelComposition() {
   if (GetInputMethod())
     GetInputMethod()->CancelComposition(this);
   has_composition_text_ = false;
 }
 
 void RenderWidgetHostViewAura::ImeCompositionRangeChanged(
     const gfx::Range& range,
@@ skipping 602 matching lines @@
   has_composition_text_ = false;
 }
 
 void RenderWidgetHostViewAura::ClearCompositionText() {
   if (host_ && has_composition_text_)
     host_->ImeCancelComposition();
   has_composition_text_ = false;
 }
 
 void RenderWidgetHostViewAura::InsertText(const base::string16& text) {
-  DCHECK(text_input_type_ != ui::TEXT_INPUT_TYPE_NONE);
+  DCHECK(current_text_input_state()->type != ui::TEXT_INPUT_TYPE_NONE);
   if (host_)
     host_->ImeConfirmComposition(text, gfx::Range::InvalidRange(), false);
   has_composition_text_ = false;
 }
 
 void RenderWidgetHostViewAura::InsertChar(const ui::KeyEvent& event) {
   if (popup_child_host_view_ && popup_child_host_view_->NeedsInputGrab()) {
     popup_child_host_view_->InsertChar(event);
     return;
   }
 
   // Ignore character messages for VKEY_RETURN sent on CTRL+M. crbug.com/315547
   if (host_ &&
       (accept_return_character_ || event.GetCharacter() != ui::VKEY_RETURN)) {
     // Send a blink::WebInputEvent::Char event to |host_|.
     ForwardKeyboardEvent(NativeWebKeyboardEvent(event, event.GetCharacter()));
   }
 }
 
 ui::TextInputType RenderWidgetHostViewAura::GetTextInputType() const {
-  return text_input_type_;
+  return current_text_input_state()->type;
 }
 
 ui::TextInputMode RenderWidgetHostViewAura::GetTextInputMode() const {
-  return text_input_mode_;
+  return current_text_input_state()->mode;
 }
 
 int RenderWidgetHostViewAura::GetTextInputFlags() const {
-  return text_input_flags_;
+  return current_text_input_state()->flags;
 }
 
 bool RenderWidgetHostViewAura::CanComposeInline() const {
-  return can_compose_inline_;
+  return current_text_input_state()->can_compose_inline;
 }
 
 gfx::Rect RenderWidgetHostViewAura::ConvertRectToScreen(
     const gfx::Rect& rect) const {
   gfx::Point origin = rect.origin();
   gfx::Point end = gfx::Point(rect.right(), rect.bottom());
 
   aura::Window* root_window = window_->GetRootWindow();
   if (!root_window)
     return rect;
@@ skipping 1379 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // RenderWidgetHostViewBase, public:
 
 // static
 void RenderWidgetHostViewBase::GetDefaultScreenInfo(WebScreenInfo* results) {
   GetScreenInfoForWindow(results, NULL);
 }
 
 }  // namespace content