src/ash/wm/custom_frame_view_ash.cc

   1 // Copyright (c) 2012 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 "ash/wm/custom_frame_view_ash.h"
   6
   7 #include "ash/ash_switches.h"
   8 #include "ash/wm/caption_buttons/frame_caption_button_container_view.h"
   9 #include "ash/wm/caption_buttons/frame_maximize_button.h"
  10 #include "ash/wm/caption_buttons/frame_maximize_button_observer.h"
  11 #include "ash/wm/frame_border_hit_test_controller.h"
  12 #include "ash/wm/header_painter.h"
  13 #include "ash/wm/immersive_fullscreen_controller.h"
  14 #include "ash/wm/window_state.h"
  15 #include "ash/wm/window_state_delegate.h"
  16 #include "ash/wm/window_state_observer.h"
  17 #include "base/command_line.h"
  18 #include "base/debug/leak_annotations.h"
  19 #include "grit/ash_resources.h"
  20 #include "ui/aura/client/aura_constants.h"
  21 #include "ui/aura/window.h"
  22 #include "ui/aura/window_observer.h"
  23 #include "ui/gfx/canvas.h"
  24 #include "ui/gfx/font_list.h"
  25 #include "ui/gfx/rect.h"
  26 #include "ui/gfx/rect_conversions.h"
  27 #include "ui/gfx/size.h"
  28 #include "ui/views/view.h"
  29 #include "ui/views/widget/native_widget_aura.h"
  30 #include "ui/views/widget/widget.h"
  31 #include "ui/views/widget/widget_delegate.h"
  32 #include "ui/views/widget/widget_deletion_observer.h"
  33
  34 namespace {
  35
  36 const gfx::FontList& GetTitleFontList() {
  37   static const gfx::FontList* title_font_list =
  38       new gfx::FontList(views::NativeWidgetAura::GetWindowTitleFontList());
  39   ANNOTATE_LEAKING_OBJECT_PTR(title_font_list);
  40   return *title_font_list;
  41 }
  42
  43 ///////////////////////////////////////////////////////////////////////////////
  44 // CustomFrameViewAshWindowStateDelegate
  45
  46 // Handles a user's fullscreen request (Shift+F4/F4). Puts the window into
  47 // immersive fullscreen if immersive fullscreen is enabled for non-browser
  48 // windows.
  49 class CustomFrameViewAshWindowStateDelegate
  50     : public ash::wm::WindowStateDelegate,
  51       public ash::wm::WindowStateObserver,
  52       public aura::WindowObserver {
  53  public:
  54   CustomFrameViewAshWindowStateDelegate(
  55       ash::wm::WindowState* window_state,
  56       ash::CustomFrameViewAsh* custom_frame_view)
  57       : window_state_(NULL) {
  58 #if defined(OS_CHROMEOS)
  59     // TODO(pkotwicz): Investigate if immersive fullscreen can be enabled for
  60     // Windows Ash.
  61     if (ash::switches::UseImmersiveFullscreenForAllWindows()) {
  62       immersive_fullscreen_controller_.reset(
  63           new ash::ImmersiveFullscreenController);
  64       custom_frame_view->InitImmersiveFullscreenControllerForView(
  65           immersive_fullscreen_controller_.get());
  66
  67       // Add a window state observer to exit fullscreen properly in case
  68       // fullscreen is exited without going through
  69       // WindowState::ToggleFullscreen(). This is the case when exiting
  70       // immersive fullscreen via the "Restore" window control.
  71       // TODO(pkotwicz): This is a hack. Remove ASAP. http://crbug.com/319048
  72       window_state_ = window_state;
  73       window_state_->AddObserver(this);
  74       window_state_->window()->AddObserver(this);
  75     }
  76 #endif
  77   }
  78   virtual ~CustomFrameViewAshWindowStateDelegate() {
  79     if (window_state_) {
  80       window_state_->RemoveObserver(this);
  81       window_state_->window()->RemoveObserver(this);
  82     }
  83   }
  84  private:
  85   // Overridden from ash::wm::WindowStateDelegate:
  86   virtual bool ToggleFullscreen(ash::wm::WindowState* window_state) OVERRIDE {
  87     bool enter_fullscreen = !window_state->IsFullscreen();
  88     if (enter_fullscreen) {
  89       window_state->window()->SetProperty(aura::client::kShowStateKey,
  90                                            ui::SHOW_STATE_FULLSCREEN);
  91     } else {
  92       window_state->Restore();
  93     }
  94     if (immersive_fullscreen_controller_) {
  95       immersive_fullscreen_controller_->SetEnabled(
  96           ash::ImmersiveFullscreenController::WINDOW_TYPE_OTHER,
  97           enter_fullscreen);
  98     }
  99     return true;
 100   }
 101   // Overridden from aura::WindowObserver:
 102   virtual void OnWindowDestroying(aura::Window* window) OVERRIDE {
 103     window_state_->RemoveObserver(this);
 104     window_state_->window()->RemoveObserver(this);
 105     window_state_ = NULL;
 106   }
 107   // Overridden from ash::wm::WindowStateObserver:
 108   virtual void OnPostWindowShowTypeChange(
 109       ash::wm::WindowState* window_state,
 110       ash::wm::WindowShowType old_type) OVERRIDE {
 111     if (!window_state->IsFullscreen() &&
 112         !window_state->IsMinimized() &&
 113         immersive_fullscreen_controller_.get() &&
 114         immersive_fullscreen_controller_->IsEnabled()) {
 115       immersive_fullscreen_controller_->SetEnabled(
 116           ash::ImmersiveFullscreenController::WINDOW_TYPE_OTHER,
 117           false);
 118     }
 119   }
 120
 121   ash::wm::WindowState* window_state_;
 122   scoped_ptr<ash::ImmersiveFullscreenController>
 123       immersive_fullscreen_controller_;
 124
 125   DISALLOW_COPY_AND_ASSIGN(CustomFrameViewAshWindowStateDelegate);
 126 };
 127
 128 }  // namespace
 129
 130 namespace ash {
 131
 132 ///////////////////////////////////////////////////////////////////////////////
 133 // CustomFrameViewAsh::HeaderView
 134
 135 // View which paints the header. It slides off and on screen in immersive
 136 // fullscreen.
 137 class CustomFrameViewAsh::HeaderView
 138     : public views::View,
 139       public ImmersiveFullscreenController::Delegate,
 140       public FrameMaximizeButtonObserver {
 141  public:
 142   // |frame| is the widget that the caption buttons act on.
 143   explicit HeaderView(views::Widget* frame);
 144   virtual ~HeaderView();
 145
 146   // Schedules a repaint for the entire title.
 147   void SchedulePaintForTitle();
 148
 149   // Tells the window controls to reset themselves to the normal state.
 150   void ResetWindowControls();
 151
 152   // Returns the amount of the view's pixels which should be on screen.
 153   int GetPreferredOnScreenHeight() const;
 154
 155   // Returns the view's preferred height.
 156   int GetPreferredHeight() const;
 157
 158   // Returns the view's minimum width.
 159   int GetMinimumWidth() const;
 160
 161   // views::View overrides:
 162   virtual void Layout() OVERRIDE;
 163   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
 164
 165   HeaderPainter* header_painter() {
 166     return header_painter_.get();
 167   }
 168
 169  private:
 170   // ImmersiveFullscreenController::Delegate overrides:
 171   virtual void OnImmersiveRevealStarted() OVERRIDE;
 172   virtual void OnImmersiveRevealEnded() OVERRIDE;
 173   virtual void OnImmersiveFullscreenExited() OVERRIDE;
 174   virtual void SetVisibleFraction(double visible_fraction) OVERRIDE;
 175   virtual std::vector<gfx::Rect> GetVisibleBoundsInScreen() const OVERRIDE;
 176
 177   // FrameMaximizeButtonObserver overrides:
 178   virtual void OnMaximizeBubbleShown(views::Widget* bubble) OVERRIDE;
 179
 180   // The widget that the caption buttons act on.
 181   views::Widget* frame_;
 182
 183   // Helper for painting the header.
 184   scoped_ptr<HeaderPainter> header_painter_;
 185
 186   // View which contains the window caption buttons.
 187   FrameCaptionButtonContainerView* caption_button_container_;
 188
 189   // The maximize bubble widget. |maximize_bubble_| may be non-NULL but have
 190   // been already destroyed.
 191   views::Widget* maximize_bubble_;
 192
 193   // Keeps track of whether |maximize_bubble_| is still alive.
 194   scoped_ptr<views::WidgetDeletionObserver> maximize_bubble_lifetime_observer_;
 195
 196   // The fraction of the header's height which is visible while in fullscreen.
 197   // This value is meaningless when not in fullscreen.
 198   double fullscreen_visible_fraction_;
 199
 200   DISALLOW_COPY_AND_ASSIGN(HeaderView);
 201 };
 202
 203 CustomFrameViewAsh::HeaderView::HeaderView(views::Widget* frame)
 204     : frame_(frame),
 205       header_painter_(new ash::HeaderPainter),
 206       caption_button_container_(NULL),
 207       maximize_bubble_(NULL),
 208       fullscreen_visible_fraction_(0) {
 209   // Unfortunately, there is no views::WidgetDelegate::CanMinimize(). Assume
 210   // that the window frame can be minimized if it can be maximized.
 211   FrameCaptionButtonContainerView::MinimizeAllowed minimize_allowed =
 212       frame_->widget_delegate()->CanMaximize() ?
 213           FrameCaptionButtonContainerView::MINIMIZE_ALLOWED :
 214           FrameCaptionButtonContainerView::MINIMIZE_DISALLOWED;
 215   caption_button_container_ = new FrameCaptionButtonContainerView(frame_,
 216       minimize_allowed);
 217   AddChildView(caption_button_container_);
 218   FrameMaximizeButton* frame_maximize_button =
 219       caption_button_container_->GetOldStyleSizeButton();
 220   if (frame_maximize_button)
 221     frame_maximize_button->AddObserver(this);
 222
 223   header_painter_->Init(frame_, this, NULL, caption_button_container_);
 224 }
 225
 226 CustomFrameViewAsh::HeaderView::~HeaderView() {
 227   FrameMaximizeButton* frame_maximize_button =
 228       caption_button_container_->GetOldStyleSizeButton();
 229   if (frame_maximize_button)
 230     frame_maximize_button->RemoveObserver(this);
 231 }
 232
 233 void CustomFrameViewAsh::HeaderView::SchedulePaintForTitle() {
 234   header_painter_->SchedulePaintForTitle(GetTitleFontList());
 235 }
 236
 237 void CustomFrameViewAsh::HeaderView::ResetWindowControls() {
 238   caption_button_container_->ResetWindowControls();
 239 }
 240
 241 int CustomFrameViewAsh::HeaderView::GetPreferredOnScreenHeight() const {
 242   if (frame_->IsFullscreen()) {
 243     return static_cast<int>(
 244         GetPreferredHeight() * fullscreen_visible_fraction_);
 245   }
 246   return GetPreferredHeight();
 247 }
 248
 249 int CustomFrameViewAsh::HeaderView::GetPreferredHeight() const {
 250   // Reserve enough space to see the buttons and the separator line.
 251   return caption_button_container_->bounds().bottom() +
 252       header_painter_->HeaderContentSeparatorSize();
 253 }
 254
 255 int CustomFrameViewAsh::HeaderView::GetMinimumWidth() const {
 256   return header_painter_->GetMinimumHeaderWidth();
 257 }
 258
 259 void CustomFrameViewAsh::HeaderView::Layout() {
 260   header_painter_->LayoutHeader(true);
 261   header_painter_->set_header_height(GetPreferredHeight());
 262 }
 263
 264 void CustomFrameViewAsh::HeaderView::OnPaint(gfx::Canvas* canvas) {
 265   int theme_image_id = 0;
 266   if (frame_->IsMaximized() || frame_->IsFullscreen())
 267     theme_image_id = IDR_AURA_WINDOW_HEADER_BASE_MINIMAL;
 268   else if (frame_->non_client_view()->frame_view()->ShouldPaintAsActive())
 269     theme_image_id = IDR_AURA_WINDOW_HEADER_BASE_ACTIVE;
 270   else
 271     theme_image_id = IDR_AURA_WINDOW_HEADER_BASE_INACTIVE;
 272
 273   header_painter_->PaintHeader(
 274       canvas,
 275       theme_image_id,
 276       0);
 277   header_painter_->PaintTitleBar(canvas, GetTitleFontList());
 278   header_painter_->PaintHeaderContentSeparator(canvas);
 279 }
 280
 281 void CustomFrameViewAsh::HeaderView::OnImmersiveRevealStarted() {
 282   fullscreen_visible_fraction_ = 0;
 283   SetPaintToLayer(true);
 284   parent()->Layout();
 285 }
 286
 287 void CustomFrameViewAsh::HeaderView::OnImmersiveRevealEnded() {
 288   fullscreen_visible_fraction_ = 0;
 289   SetPaintToLayer(false);
 290   parent()->Layout();
 291 }
 292
 293 void CustomFrameViewAsh::HeaderView::OnImmersiveFullscreenExited() {
 294   fullscreen_visible_fraction_ = 0;
 295   SetPaintToLayer(false);
 296   parent()->Layout();
 297 }
 298
 299 void CustomFrameViewAsh::HeaderView::SetVisibleFraction(
 300     double visible_fraction) {
 301   if (fullscreen_visible_fraction_ != visible_fraction) {
 302     fullscreen_visible_fraction_ = visible_fraction;
 303     parent()->Layout();
 304   }
 305 }
 306
 307 std::vector<gfx::Rect>
 308 CustomFrameViewAsh::HeaderView::GetVisibleBoundsInScreen() const {
 309   // TODO(pkotwicz): Implement views::View::ConvertRectToScreen().
 310   gfx::Rect visible_bounds(GetVisibleBounds());
 311   gfx::Point visible_origin_in_screen(visible_bounds.origin());
 312   views::View::ConvertPointToScreen(this, &visible_origin_in_screen);
 313   std::vector<gfx::Rect> bounds_in_screen;
 314   bounds_in_screen.push_back(
 315       gfx::Rect(visible_origin_in_screen, visible_bounds.size()));
 316   if (maximize_bubble_lifetime_observer_.get() &&
 317       maximize_bubble_lifetime_observer_->IsWidgetAlive()) {
 318     bounds_in_screen.push_back(maximize_bubble_->GetWindowBoundsInScreen());
 319   }
 320   return bounds_in_screen;
 321 }
 322
 323 void CustomFrameViewAsh::HeaderView::OnMaximizeBubbleShown(
 324     views::Widget* bubble) {
 325   maximize_bubble_ = bubble;
 326   maximize_bubble_lifetime_observer_.reset(
 327       new views::WidgetDeletionObserver(bubble));
 328 }
 329
 330 ///////////////////////////////////////////////////////////////////////////////
 331 // CustomFrameViewAsh::OverlayView
 332
 333 // View which takes up the entire widget and contains the HeaderView. HeaderView
 334 // is a child of OverlayView to avoid creating a larger texture than necessary
 335 // when painting the HeaderView to its own layer.
 336 class CustomFrameViewAsh::OverlayView : public views::View {
 337  public:
 338   explicit OverlayView(HeaderView* header_view);
 339   virtual ~OverlayView();
 340
 341   // views::View override:
 342   virtual void Layout() OVERRIDE;
 343   virtual bool HitTestRect(const gfx::Rect& rect) const OVERRIDE;
 344
 345  private:
 346   HeaderView* header_view_;
 347
 348   DISALLOW_COPY_AND_ASSIGN(OverlayView);
 349 };
 350
 351 CustomFrameViewAsh::OverlayView::OverlayView(HeaderView* header_view)
 352     : header_view_(header_view) {
 353   AddChildView(header_view);
 354 }
 355
 356 CustomFrameViewAsh::OverlayView::~OverlayView() {
 357 }
 358
 359 void CustomFrameViewAsh::OverlayView::Layout() {
 360   // Layout |header_view_| because layout affects the result of
 361   // GetPreferredOnScreenHeight().
 362   header_view_->Layout();
 363
 364   int onscreen_height = header_view_->GetPreferredOnScreenHeight();
 365   if (onscreen_height == 0) {
 366     header_view_->SetVisible(false);
 367   } else {
 368     int height = header_view_->GetPreferredHeight();
 369     header_view_->SetBounds(0, onscreen_height - height, width(), height);
 370     header_view_->SetVisible(true);
 371   }
 372 }
 373
 374 bool CustomFrameViewAsh::OverlayView::HitTestRect(const gfx::Rect& rect) const {
 375   // Grab events in the header view. Return false for other events so that they
 376   // can be handled by the client view.
 377   return header_view_->HitTestRect(rect);
 378 }
 379
 380 ////////////////////////////////////////////////////////////////////////////////
 381 // CustomFrameViewAsh, public:
 382
 383 // static
 384 const char CustomFrameViewAsh::kViewClassName[] = "CustomFrameViewAsh";
 385
 386 CustomFrameViewAsh::CustomFrameViewAsh(views::Widget* frame)
 387     : frame_(frame),
 388       header_view_(new HeaderView(frame)),
 389       frame_border_hit_test_controller_(
 390           new FrameBorderHitTestController(frame_)) {
 391   // |header_view_| is set as the non client view's overlay view so that it can
 392   // overlay the web contents in immersive fullscreen.
 393   frame->non_client_view()->SetOverlayView(new OverlayView(header_view_));
 394
 395   // A delegate for a more complex way of fullscreening the window may already
 396   // be set. This is the case for packaged apps.
 397   wm::WindowState* window_state = wm::GetWindowState(frame->GetNativeWindow());
 398   if (!window_state->HasDelegate()) {
 399     window_state->SetDelegate(scoped_ptr<wm::WindowStateDelegate>(
 400         new CustomFrameViewAshWindowStateDelegate(
 401             window_state, this)));
 402   }
 403 }
 404
 405 CustomFrameViewAsh::~CustomFrameViewAsh() {
 406 }
 407
 408 void CustomFrameViewAsh::InitImmersiveFullscreenControllerForView(
 409     ImmersiveFullscreenController* immersive_fullscreen_controller) {
 410   immersive_fullscreen_controller->Init(header_view_, frame_, header_view_);
 411 }
 412
 413 ////////////////////////////////////////////////////////////////////////////////
 414 // CustomFrameViewAsh, views::NonClientFrameView overrides:
 415
 416 gfx::Rect CustomFrameViewAsh::GetBoundsForClientView() const {
 417   int top_height = NonClientTopBorderHeight();
 418   return HeaderPainter::GetBoundsForClientView(top_height, bounds());
 419 }
 420
 421 gfx::Rect CustomFrameViewAsh::GetWindowBoundsForClientBounds(
 422     const gfx::Rect& client_bounds) const {
 423   int top_height = NonClientTopBorderHeight();
 424   return HeaderPainter::GetWindowBoundsForClientBounds(top_height,
 425                                                        client_bounds);
 426 }
 427
 428 int CustomFrameViewAsh::NonClientHitTest(const gfx::Point& point) {
 429   return FrameBorderHitTestController::NonClientHitTest(this,
 430       header_view_->header_painter(), point);
 431 }
 432
 433 void CustomFrameViewAsh::GetWindowMask(const gfx::Size& size,
 434                                        gfx::Path* window_mask) {
 435   // No window masks in Aura.
 436 }
 437
 438 void CustomFrameViewAsh::ResetWindowControls() {
 439   header_view_->ResetWindowControls();
 440 }
 441
 442 void CustomFrameViewAsh::UpdateWindowIcon() {
 443 }
 444
 445 void CustomFrameViewAsh::UpdateWindowTitle() {
 446   header_view_->SchedulePaintForTitle();
 447 }
 448
 449 ////////////////////////////////////////////////////////////////////////////////
 450 // CustomFrameViewAsh, views::View overrides:
 451
 452 gfx::Size CustomFrameViewAsh::GetPreferredSize() {
 453   gfx::Size pref = frame_->client_view()->GetPreferredSize();
 454   gfx::Rect bounds(0, 0, pref.width(), pref.height());
 455   return frame_->non_client_view()->GetWindowBoundsForClientBounds(
 456       bounds).size();
 457 }
 458
 459 const char* CustomFrameViewAsh::GetClassName() const {
 460   return kViewClassName;
 461 }
 462
 463 gfx::Size CustomFrameViewAsh::GetMinimumSize() {
 464   gfx::Size min_client_view_size(frame_->client_view()->GetMinimumSize());
 465   return gfx::Size(
 466       std::max(header_view_->GetMinimumWidth(), min_client_view_size.width()),
 467       NonClientTopBorderHeight() + min_client_view_size.height());
 468 }
 469
 470 gfx::Size CustomFrameViewAsh::GetMaximumSize() {
 471   return frame_->client_view()->GetMaximumSize();
 472 }
 473
 474 void CustomFrameViewAsh::SchedulePaintInRect(const gfx::Rect& r) {
 475   // We may end up here before |header_view_| has been added to the Widget.
 476   if (header_view_->GetWidget()) {
 477     // The HeaderView is not a child of CustomFrameViewAsh. Redirect the paint
 478     // to HeaderView instead.
 479     gfx::RectF to_paint(r);
 480     views::View::ConvertRectToTarget(this, header_view_, &to_paint);
 481     header_view_->SchedulePaintInRect(gfx::ToEnclosingRect(to_paint));
 482   } else {
 483     views::NonClientFrameView::SchedulePaintInRect(r);
 484   }
 485 }
 486
 487 bool CustomFrameViewAsh::HitTestRect(const gfx::Rect& rect) const {
 488   // NonClientView hit tests the NonClientFrameView first instead of going in
 489   // z-order. Return false so that events get to the OverlayView.
 490   return false;
 491 }
 492
 493 views::View* CustomFrameViewAsh::GetHeaderView() {
 494   return header_view_;
 495 }
 496
 497 ////////////////////////////////////////////////////////////////////////////////
 498 // CustomFrameViewAsh, private:
 499
 500 int CustomFrameViewAsh::NonClientTopBorderHeight() const {
 501   return frame_->IsFullscreen() ? 0 : header_view_->GetPreferredHeight();
 502 }
 503
 504 }  // namespace ash