text: // Copyright 2013 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 "ash/shelf/shelf.h"
  
  #include <algorithm>
  #include <cmath>
  
  #include "ash/focus_cycler.h"
  #include "ash/root_window_controller.h"
  #include "ash/screen_util.h"
  #include "ash/shelf/shelf_delegate.h"
  #include "ash/shelf/shelf_item_delegate.h"
  #include "ash/shelf/shelf_item_delegate_manager.h"
  #include "ash/shelf/shelf_layout_manager.h"
  #include "ash/shelf/shelf_model.h"
  #include "ash/shelf/shelf_navigator.h"
  #include "ash/shelf/shelf_util.h"
  #include "ash/shelf/shelf_view.h"
  #include "ash/shelf/shelf_widget.h"
  #include "ash/shell.h"
  #include "ash/shell_delegate.h"
  #include "ash/shell_window_ids.h"
  #include "ash/wm/window_properties.h"
  #include "grit/ash_resources.h"
  #include "ui/aura/window.h"
  #include "ui/aura/window_event_dispatcher.h"
  #include "ui/aura/window_observer.h"
  #include "ui/base/resource/resource_bundle.h"
  #include "ui/compositor/layer.h"
  #include "ui/gfx/canvas.h"
  #include "ui/gfx/image/image.h"
  #include "ui/gfx/image/image_skia_operations.h"
  #include "ui/gfx/skbitmap_operations.h"
  #include "ui/views/accessible_pane_view.h"
  #include "ui/views/widget/widget.h"
  #include "ui/views/widget/widget_delegate.h"
  #include "ui/wm/public/activation_client.h"
  
  namespace ash {
  
  const char Shelf::kNativeViewName[] = "ShelfView";
  
  Shelf::Shelf(ShelfModel* shelf_model,
               ShelfDelegate* shelf_delegate,
               ShelfWidget* shelf_widget)
      : shelf_view_(NULL),
        alignment_(shelf_widget->GetAlignment()),
        delegate_(shelf_delegate),
        shelf_widget_(shelf_widget) {
    shelf_view_ = new ShelfView(
        shelf_model, delegate_, shelf_widget_->shelf_layout_manager());
    shelf_view_->Init();
    shelf_widget_->GetContentsView()->AddChildView(shelf_view_);
    shelf_widget_->GetNativeView()->SetName(kNativeViewName);
    delegate_->OnShelfCreated(this);
  }
  
  Shelf::~Shelf() {
    delegate_->OnShelfDestroyed(this);
  }
  
  // static
  Shelf* Shelf::ForPrimaryDisplay() {
    ShelfWidget* shelf_widget =
        RootWindowController::ForShelf(Shell::GetPrimaryRootWindow())->shelf();
    return shelf_widget ? shelf_widget->shelf() : NULL;
  }
  
  // static
  Shelf* Shelf::ForWindow(aura::Window* window) {
    ShelfWidget* shelf_widget = RootWindowController::ForShelf(window)->shelf();
    return shelf_widget ? shelf_widget->shelf() : NULL;
  }
  
  void Shelf::SetAlignment(ShelfAlignment alignment) {
    alignment_ = alignment;
    shelf_view_->OnShelfAlignmentChanged();
    // ShelfLayoutManager will resize the shelf.
  }
  
  gfx::Rect Shelf::GetScreenBoundsOfItemIconForWindow(aura::Window* window) {
    ShelfID id = GetShelfIDForWindow(window);
    gfx::Rect bounds(shelf_view_->GetIdealBoundsOfItemIcon(id));
    gfx::Point screen_origin;
    views::View::ConvertPointToScreen(shelf_view_, &screen_origin);
    return gfx::Rect(screen_origin.x() + bounds.x(),
                     screen_origin.y() + bounds.y(),
                     bounds.width(),
                     bounds.height());
  }
  
  void Shelf::UpdateIconPositionForWindow(aura::Window* window) {
    shelf_view_->UpdatePanelIconPosition(
        GetShelfIDForWindow(window),
        ScreenUtil::ConvertRectFromScreen(
            shelf_widget()->GetNativeView(),
            window->GetBoundsInScreen()).CenterPoint());
  }
  
  void Shelf::ActivateShelfItem(int index) {
    // We pass in a keyboard event which will then trigger a switch to the
    // next item if the current one is already active.
    ui::KeyEvent event(ui::ET_KEY_RELEASED,
                       ui::VKEY_UNKNOWN,  // The actual key gets ignored.
                       ui::EF_NONE,
                       false);
  
    const ShelfItem& item = shelf_view_->model()->items()[index];
    ShelfItemDelegate* item_delegate =
        Shell::GetInstance()->shelf_item_delegate_manager()->GetShelfItemDelegate(
            item.id);
    item_delegate->ItemSelected(event);
  }
  
  void Shelf::CycleWindowLinear(CycleDirection direction) {
    int item_index = GetNextActivatedItemIndex(
        *(shelf_view_->model()), direction);
    if (item_index >= 0)
      ActivateShelfItem(item_index);
  }
  
  void Shelf::AddIconObserver(ShelfIconObserver* observer) {
    shelf_view_->AddIconObserver(observer);
  }
  
  void Shelf::RemoveIconObserver(ShelfIconObserver* observer) {
    shelf_view_->RemoveIconObserver(observer);
  }
  
  bool Shelf::IsShowingMenu() const {
    return shelf_view_->IsShowingMenu();
  }
  
  bool Shelf::IsShowingOverflowBubble() const {
    return shelf_view_->IsShowingOverflowBubble();
  }
  
  void Shelf::SetVisible(bool visible) const {
    shelf_view_->SetVisible(visible);
  }
  
  bool Shelf::IsVisible() const {
    return shelf_view_->visible();
  }
  
  void Shelf::SchedulePaint() {
    shelf_view_->SchedulePaintForAllButtons();
  }
  
  views::View* Shelf::GetAppListButtonView() const {
    return shelf_view_->GetAppListButtonView();
  }
  
  void Shelf::LaunchAppIndexAt(int item_index) {
    ShelfModel* shelf_model = shelf_view_->model();
    const ShelfItems& items = shelf_model->items();
    int item_count = shelf_model->item_count();
    int indexes_left = item_index >= 0 ? item_index : item_count;
    int found_index = -1;
  
    // Iterating until we have hit the index we are interested in which
    // is true once indexes_left becomes negative.
    for (int i = 0; i < item_count && indexes_left >= 0; i++) {
      if (items[i].type != TYPE_APP_LIST) {
        found_index = i;
        indexes_left--;
      }
    }
  
    // There are two ways how found_index can be valid: a.) the nth item was
    // found (which is true when indexes_left is -1) or b.) the last item was
    // requested (which is true when index was passed in as a negative number).
    if (found_index >= 0 && (indexes_left == -1 || item_index < 0)) {
      // Then set this one as active (or advance to the next item of its kind).
      ActivateShelfItem(found_index);
    }
  }
  
  void Shelf::SetShelfViewBounds(gfx::Rect bounds) {
    shelf_view_->SetBoundsRect(bounds);
  }
  
  gfx::Rect Shelf::GetShelfViewBounds() const {
    return shelf_view_->bounds();
  }
  
  gfx::Rect Shelf::GetVisibleItemsBoundsInScreen() const {
    return shelf_view_->GetVisibleItemsBoundsInScreen();
  }
  
  app_list::ApplicationDragAndDropHost* Shelf::GetDragAndDropHostForAppList() {
    return shelf_view_;
  }
  
  }  // namespace ash
  