ui/views/cocoa/bridged_native_widget.mm

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #import "ui/views/cocoa/bridged_native_widget.h"
   6
   7 #include "base/logging.h"
   8 #include "ui/base/ime/input_method.h"
   9 #include "ui/base/ime/input_method_factory.h"
  10 #include "ui/base/ui_base_switches_util.h"
  11 #import "ui/views/cocoa/bridged_content_view.h"
  12 #import "ui/views/cocoa/views_nswindow_delegate.h"
  13 #include "ui/views/widget/native_widget_mac.h"
  14 #include "ui/views/ime/input_method_bridge.h"
  15 #include "ui/views/ime/null_input_method.h"
  16 #include "ui/views/view.h"
  17 #include "ui/views/widget/widget.h"
  18
  19 namespace views {
  20
  21 BridgedNativeWidget::BridgedNativeWidget(NativeWidgetMac* parent)
  22     : native_widget_mac_(parent), focus_manager_(NULL) {
  23   DCHECK(parent);
  24   window_delegate_.reset(
  25       [[ViewsNSWindowDelegate alloc] initWithBridgedNativeWidget:this]);
  26 }
  27
  28 BridgedNativeWidget::~BridgedNativeWidget() {
  29   RemoveOrDestroyChildren();
  30   SetFocusManager(NULL);
  31   SetRootView(NULL);
  32   if ([window_ delegate]) {
  33     // If the delegate is still set, it means OnWindowWillClose has not been
  34     // called and the window is still open. Calling -[NSWindow close] will
  35     // synchronously call OnWindowWillClose and notify NativeWidgetMac.
  36     [window_ close];
  37   }
  38   DCHECK(![window_ delegate]);
  39 }
  40
  41 void BridgedNativeWidget::Init(base::scoped_nsobject<NSWindow> window,
  42                                const Widget::InitParams& params) {
  43   DCHECK(!window_);
  44   window_.swap(window);
  45   [window_ setDelegate:window_delegate_];
  46
  47   if (params.parent) {
  48     // Use NSWindow to manage child windows. This won't automatically close them
  49     // but it will maintain relative positioning of the window layer and origin.
  50     [[params.parent window] addChildWindow:window_ ordered:NSWindowAbove];
  51   }
  52 }
  53
  54 void BridgedNativeWidget::SetFocusManager(FocusManager* focus_manager) {
  55   if (focus_manager_ == focus_manager)
  56     return;
  57
  58   if (focus_manager_)
  59     focus_manager_->RemoveFocusChangeListener(this);
  60
  61   if (focus_manager)
  62     focus_manager->AddFocusChangeListener(this);
  63
  64   focus_manager_ = focus_manager;
  65 }
  66
  67 void BridgedNativeWidget::SetRootView(views::View* view) {
  68   if (view == [bridged_view_ hostedView])
  69     return;
  70
  71   [bridged_view_ clearView];
  72   bridged_view_.reset();
  73   // Note that there can still be references to the old |bridged_view_|
  74   // floating around in Cocoa libraries at this point. However, references to
  75   // the old views::View will be gone, so any method calls will become no-ops.
  76
  77   if (view) {
  78     bridged_view_.reset([[BridgedContentView alloc] initWithView:view]);
  79     // Objective C initializers can return nil. However, if |view| is non-NULL
  80     // this should be treated as an error and caught early.
  81     CHECK(bridged_view_);
  82   }
  83   [window_ setContentView:bridged_view_];
  84 }
  85
  86 void BridgedNativeWidget::OnWindowWillClose() {
  87   [[window_ parentWindow] removeChildWindow:window_];
  88   [window_ setDelegate:nil];
  89   native_widget_mac_->OnWindowWillClose();
  90 }
  91
  92 InputMethod* BridgedNativeWidget::CreateInputMethod() {
  93   if (switches::IsTextInputFocusManagerEnabled())
  94     return new NullInputMethod();
  95
  96   return new InputMethodBridge(this, GetHostInputMethod(), true);
  97 }
  98
  99 ui::InputMethod* BridgedNativeWidget::GetHostInputMethod() {
 100   if (!input_method_) {
 101     // Delegate is NULL because Mac IME does not need DispatchKeyEventPostIME
 102     // callbacks.
 103     input_method_ = ui::CreateInputMethod(NULL, nil);
 104   }
 105   return input_method_.get();
 106 }
 107
 108 ////////////////////////////////////////////////////////////////////////////////
 109 // BridgedNativeWidget, internal::InputMethodDelegate:
 110
 111 void BridgedNativeWidget::DispatchKeyEventPostIME(const ui::KeyEvent& key) {
 112   // Mac key events don't go through this, but some unit tests that use
 113   // MockInputMethod do.
 114   DCHECK(focus_manager_);
 115   native_widget_mac_->GetWidget()->OnKeyEvent(const_cast<ui::KeyEvent*>(&key));
 116   if (!key.handled())
 117     focus_manager_->OnKeyEvent(key);
 118 }
 119
 120 void BridgedNativeWidget::OnWillChangeFocus(View* focused_before,
 121                                             View* focused_now) {
 122 }
 123
 124 void BridgedNativeWidget::OnDidChangeFocus(View* focused_before,
 125                                            View* focused_now) {
 126   ui::TextInputClient* input_client =
 127       focused_now ? focused_now->GetTextInputClient() : NULL;
 128   [bridged_view_ setTextInputClient:input_client];
 129 }
 130
 131 ////////////////////////////////////////////////////////////////////////////////
 132 // BridgedNativeWidget, private:
 133
 134 void BridgedNativeWidget::RemoveOrDestroyChildren() {
 135   // TODO(tapted): Implement unowned child windows if required.
 136   base::scoped_nsobject<NSArray> child_windows(
 137       [[NSArray alloc] initWithArray:[window_ childWindows]]);
 138   [child_windows makeObjectsPerformSelector:@selector(close)];
 139 }
 140
 141 }  // namespace views