MacViews: Implement text input.

ui/views/cocoa/bridged_native_widget.mm

 // Copyright 2014 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.
 
 #import "ui/views/cocoa/bridged_native_widget.h"
 
 #include "base/logging.h"
 #include "ui/base/ime/input_method.h"
 #include "ui/base/ime/input_method_factory.h"
 #include "ui/base/ui_base_switches_util.h"
 #import "ui/views/cocoa/bridged_content_view.h"
 #import "ui/views/cocoa/views_nswindow_delegate.h"
 #include "ui/views/widget/native_widget_mac.h"
 #include "ui/views/ime/input_method_bridge.h"
 #include "ui/views/ime/null_input_method.h"
 #include "ui/views/view.h"
+#include "ui/views/widget/widget.h"
 
 namespace views {
 
 BridgedNativeWidget::BridgedNativeWidget(NativeWidgetMac* parent)
-    : native_widget_mac_(parent) {
+    : native_widget_mac_(parent), focus_manager_(NULL) {
   DCHECK(parent);
   window_delegate_.reset(
       [[ViewsNSWindowDelegate alloc] initWithBridgedNativeWidget:this]);
 }
 
 BridgedNativeWidget::~BridgedNativeWidget() {
   RemoveOrDestroyChildren();
+  SetFocusManager(NULL);
   SetRootView(NULL);
   if ([window_ delegate]) {
     // If the delegate is still set, it means OnWindowWillClose has not been
     // called and the window is still open. Calling -[NSWindow close] will
     // synchronously call OnWindowWillClose and notify NativeWidgetMac.
     [window_ close];
   }
   DCHECK(![window_ delegate]);
 }
 
 void BridgedNativeWidget::Init(base::scoped_nsobject<NSWindow> window,
                                const Widget::InitParams& params) {
   DCHECK(!window_);
   window_.swap(window);
   [window_ setDelegate:window_delegate_];
 
   if (params.parent) {
     // Use NSWindow to manage child windows. This won't automatically close them
     // but it will maintain relative positioning of the window layer and origin.
     [[params.parent window] addChildWindow:window_ ordered:NSWindowAbove];
   }
 }
 
+void BridgedNativeWidget::SetFocusManager(FocusManager* focus_manager) {
+  if (focus_manager_ == focus_manager)
+    return;
+
+  if (focus_manager_)
+    focus_manager_->RemoveFocusChangeListener(this);
+
+  if (focus_manager)
+    focus_manager->AddFocusChangeListener(this);
+
+  focus_manager_ = focus_manager;
+}
+
 void BridgedNativeWidget::SetRootView(views::View* view) {
   if (view == [bridged_view_ hostedView])
     return;
 
   [bridged_view_ clearView];
   bridged_view_.reset();
   // Note that there can still be references to the old |bridged_view_|
   // floating around in Cocoa libraries at this point. However, references to
   // the old views::View will be gone, so any method calls will become no-ops.
 
@@ skipping 27 matching lines @@
   }
   return input_method_.get();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // BridgedNativeWidget, internal::InputMethodDelegate:
 
 void BridgedNativeWidget::DispatchKeyEventPostIME(const ui::KeyEvent& key) {
   // Mac key events don't go through this, but some unit tests that use
   // MockInputMethod do.
-  Widget* widget = [bridged_view_ hostedView]->GetWidget();
-  widget->OnKeyEvent(const_cast<ui::KeyEvent*>(&key));
-  if (!key.handled() && widget->GetFocusManager())
-    widget->GetFocusManager()->OnKeyEvent(key);
+  DCHECK(focus_manager_);
+  native_widget_mac_->GetWidget()->OnKeyEvent(const_cast<ui::KeyEvent*>(&key));
+  if (!key.handled())
+    focus_manager_->OnKeyEvent(key);
+}
+
+void BridgedNativeWidget::OnWillChangeFocus(View* focused_before,
+                                            View* focused_now) {
+}
+
+void BridgedNativeWidget::OnDidChangeFocus(View* focused_before,
+                                           View* focused_now) {
+  ui::TextInputClient* input_client =
+      focused_now ? focused_now->GetTextInputClient() : NULL;
+  [bridged_view_ setTextInputClient:input_client];
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // BridgedNativeWidget, private:
 
 void BridgedNativeWidget::RemoveOrDestroyChildren() {
   // TODO(tapted): Implement unowned child windows if required.
   base::scoped_nsobject<NSArray> child_windows(
       [[NSArray alloc] initWithArray:[window_ childWindows]]);
   [child_windows makeObjectsPerformSelector:@selector(close)];
 }
 
 }  // namespace views