mojo/views/native_widget_view_manager.cc

   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 #include "mojo/views/native_widget_view_manager.h"
   6
   7 #include "mojo/aura/window_tree_host_mojo.h"
   8 #include "mojo/converters/input_events/input_events_type_converters.h"
   9 #include "ui/aura/client/aura_constants.h"
  10 #include "ui/aura/client/default_capture_client.h"
  11 #include "ui/aura/window.h"
  12 #include "ui/aura/window_event_dispatcher.h"
  13 #include "ui/base/ime/input_method.h"
  14 #include "ui/base/ime/input_method_base.h"
  15 #include "ui/base/ime/input_method_delegate.h"
  16 #include "ui/base/ime/input_method_factory.h"
  17 #include "ui/base/ime/text_input_client.h"
  18 #include "ui/wm/core/base_focus_rules.h"
  19 #include "ui/wm/core/capture_controller.h"
  20 #include "ui/wm/core/focus_controller.h"
  21
  22 #if defined(OS_LINUX)
  23 #include "mojo/views/input_method_mojo_linux.h"
  24 #endif
  25
  26 namespace mojo {
  27 namespace {
  28
  29 // TODO: figure out what this should be.
  30 class FocusRulesImpl : public wm::BaseFocusRules {
  31  public:
  32   FocusRulesImpl() {}
  33   virtual ~FocusRulesImpl() {}
  34
  35   virtual bool SupportsChildActivation(aura::Window* window) const override {
  36     return true;
  37   }
  38
  39  private:
  40   DISALLOW_COPY_AND_ASSIGN(FocusRulesImpl);
  41 };
  42
  43 class MinimalInputEventFilter : public ui::internal::InputMethodDelegate,
  44                                 public ui::EventHandler {
  45  public:
  46   explicit MinimalInputEventFilter(aura::Window* root)
  47       : root_(root) {
  48     ui::InitializeInputMethodForTesting();
  49 #if defined(OS_LINUX)
  50     input_method_.reset(new InputMethodMojoLinux(this));
  51 #else
  52     input_method_ = ui::CreateInputMethod(this, gfx::kNullAcceleratedWidget);
  53 #endif
  54     input_method_->Init(true);
  55     root_->AddPreTargetHandler(this);
  56     root_->SetProperty(aura::client::kRootWindowInputMethodKey,
  57                        input_method_.get());
  58   }
  59
  60   virtual ~MinimalInputEventFilter() {
  61     root_->RemovePreTargetHandler(this);
  62     root_->SetProperty(aura::client::kRootWindowInputMethodKey,
  63                        static_cast<ui::InputMethod*>(NULL));
  64   }
  65
  66  private:
  67   // ui::EventHandler:
  68   virtual void OnKeyEvent(ui::KeyEvent* event) override {
  69     // See the comment in InputMethodEventFilter::OnKeyEvent() for details.
  70     if (event->IsTranslated()) {
  71       event->SetTranslated(false);
  72     } else {
  73       if (input_method_->DispatchKeyEvent(*event))
  74         event->StopPropagation();
  75     }
  76   }
  77
  78   // ui::internal::InputMethodDelegate:
  79   virtual bool DispatchKeyEventPostIME(const ui::KeyEvent& event) override {
  80     // See the comment in InputMethodEventFilter::DispatchKeyEventPostIME() for
  81     // details.
  82     ui::KeyEvent aura_event(event);
  83     aura_event.SetTranslated(true);
  84     ui::EventDispatchDetails details =
  85         root_->GetHost()->dispatcher()->OnEventFromSource(&aura_event);
  86     return aura_event.handled() || details.dispatcher_destroyed;
  87   }
  88
  89   aura::Window* root_;
  90   scoped_ptr<ui::InputMethod> input_method_;
  91
  92   DISALLOW_COPY_AND_ASSIGN(MinimalInputEventFilter);
  93 };
  94
  95 }  // namespace
  96
  97 NativeWidgetViewManager::NativeWidgetViewManager(
  98     views::internal::NativeWidgetDelegate* delegate,
  99     Shell* shell,
 100     View* view)
 101     : NativeWidgetAura(delegate), view_(view) {
 102   view_->AddObserver(this);
 103   window_tree_host_.reset(new WindowTreeHostMojo(shell, view_));
 104   window_tree_host_->InitHost();
 105
 106   ime_filter_.reset(
 107       new MinimalInputEventFilter(window_tree_host_->window()));
 108
 109   focus_client_.reset(new wm::FocusController(new FocusRulesImpl));
 110
 111   aura::client::SetFocusClient(window_tree_host_->window(),
 112                                focus_client_.get());
 113   aura::client::SetActivationClient(window_tree_host_->window(),
 114                                     focus_client_.get());
 115   window_tree_host_->window()->AddPreTargetHandler(focus_client_.get());
 116
 117   capture_client_.reset(
 118       new aura::client::DefaultCaptureClient(window_tree_host_->window()));
 119 }
 120
 121 NativeWidgetViewManager::~NativeWidgetViewManager() {
 122   if (view_)
 123     view_->RemoveObserver(this);
 124 }
 125
 126 void NativeWidgetViewManager::InitNativeWidget(
 127     const views::Widget::InitParams& in_params) {
 128   views::Widget::InitParams params(in_params);
 129   params.parent = window_tree_host_->window();
 130   NativeWidgetAura::InitNativeWidget(params);
 131 }
 132
 133 void NativeWidgetViewManager::OnViewDestroyed(View* view) {
 134   DCHECK_EQ(view, view_);
 135   view->RemoveObserver(this);
 136   view_ = NULL;
 137   // TODO(sky): WindowTreeHostMojo assumes the View outlives it.
 138   // NativeWidgetViewManager needs to deal, likely by deleting this.
 139 }
 140
 141 void NativeWidgetViewManager::OnViewBoundsChanged(View* view,
 142                                                   const gfx::Rect& old_bounds,
 143                                                   const gfx::Rect& new_bounds) {
 144   GetWidget()->SetBounds(gfx::Rect(view->bounds().size()));
 145 }
 146
 147 void NativeWidgetViewManager::OnViewInputEvent(View* view,
 148                                                const EventPtr& event) {
 149   scoped_ptr<ui::Event> ui_event(event.To<scoped_ptr<ui::Event> >());
 150   if (ui_event)
 151     window_tree_host_->SendEventToProcessor(ui_event.get());
 152 }
 153
 154 }  // namespace mojo