1// Copyright 2013 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 "ui/app_list/views/app_list_folder_view.h"
6
7#include <algorithm>
8
9#include "ui/accessibility/ax_view_state.h"
10#include "ui/app_list/app_list_constants.h"
11#include "ui/app_list/app_list_folder_item.h"
12#include "ui/app_list/app_list_model.h"
13#include "ui/app_list/views/app_list_item_view.h"
14#include "ui/app_list/views/app_list_main_view.h"
15#include "ui/app_list/views/apps_container_view.h"
16#include "ui/app_list/views/apps_grid_view.h"
17#include "ui/app_list/views/contents_view.h"
18#include "ui/app_list/views/folder_background_view.h"
19#include "ui/app_list/views/folder_header_view.h"
20#include "ui/app_list/views/search_box_view.h"
21#include "ui/compositor/scoped_layer_animation_settings.h"
22#include "ui/events/event.h"
23#include "ui/gfx/rect_conversions.h"
24#include "ui/strings/grit/ui_strings.h"
25#include "ui/views/controls/textfield/textfield.h"
26#include "ui/views/view_model.h"
27#include "ui/views/view_model_utils.h"
28
29namespace app_list {
30
31namespace {
32
33// Indexes of interesting views in ViewModel of AppListFolderView.
34const int kIndexFolderHeader = 0;
35const int kIndexChildItems = 1;
36
37// Threshold for the distance from the center of the item to the circle of the
38// folder container ink bubble, beyond which, the item is considered dragged
39// out of the folder boundary.
40const int kOutOfFolderContainerBubbleDelta = 30;
41
42}  // namespace
43
44AppListFolderView::AppListFolderView(AppsContainerView* container_view,
45                                     AppListModel* model,
46                                     AppListMainView* app_list_main_view)
47    : container_view_(container_view),
48      app_list_main_view_(app_list_main_view),
49      folder_header_view_(new FolderHeaderView(this)),
50      view_model_(new views::ViewModel),
51      model_(model),
52      folder_item_(NULL),
53      hide_for_reparent_(false) {
54  AddChildView(folder_header_view_);
55  view_model_->Add(folder_header_view_, kIndexFolderHeader);
56
57  items_grid_view_ = new AppsGridView(app_list_main_view_);
58  items_grid_view_->set_folder_delegate(this);
59  items_grid_view_->SetLayout(
60      container_view->apps_grid_view()->cols(),
61      container_view->apps_grid_view()->rows_per_page());
62  items_grid_view_->SetModel(model);
63  AddChildView(items_grid_view_);
64  view_model_->Add(items_grid_view_, kIndexChildItems);
65
66  SetPaintToLayer(true);
67  SetFillsBoundsOpaquely(false);
68
69  model_->AddObserver(this);
70}
71
72AppListFolderView::~AppListFolderView() {
73  model_->RemoveObserver(this);
74}
75
76void AppListFolderView::SetAppListFolderItem(AppListFolderItem* folder) {
77  accessible_name_ = ui::ResourceBundle::GetSharedInstance().GetLocalizedString(
78      IDS_APP_LIST_FOLDER_OPEN_FOLDER_ACCESSIBILE_NAME);
79  NotifyAccessibilityEvent(ui::AX_EVENT_ALERT, true);
80
81  folder_item_ = folder;
82  items_grid_view_->SetItemList(folder_item_->item_list());
83  folder_header_view_->SetFolderItem(folder_item_);
84}
85
86void AppListFolderView::ScheduleShowHideAnimation(bool show,
87                                                  bool hide_for_reparent) {
88  hide_for_reparent_ = hide_for_reparent;
89
90  // Stop any previous animation.
91  layer()->GetAnimator()->StopAnimating();
92
93  // Hide the top items temporarily if showing the view for opening the folder.
94  if (show)
95    items_grid_view_->SetTopItemViewsVisible(false);
96
97  // Set initial state.
98  layer()->SetOpacity(show ? 0.0f : 1.0f);
99  SetVisible(true);
100  UpdateFolderNameVisibility(true);
101
102  ui::ScopedLayerAnimationSettings animation(layer()->GetAnimator());
103  animation.SetTweenType(
104      show ? kFolderFadeInTweenType : kFolderFadeOutTweenType);
105  animation.AddObserver(this);
106  animation.SetTransitionDuration(base::TimeDelta::FromMilliseconds(
107      show ? kFolderTransitionInDurationMs : kFolderTransitionOutDurationMs));
108
109  layer()->SetOpacity(show ? 1.0f : 0.0f);
110}
111
112gfx::Size AppListFolderView::GetPreferredSize() const {
113  const gfx::Size header_size = folder_header_view_->GetPreferredSize();
114  const gfx::Size grid_size = items_grid_view_->GetPreferredSize();
115  int width = std::max(header_size.width(), grid_size.width());
116  int height = header_size.height() + grid_size.height();
117  return gfx::Size(width, height);
118}
119
120void AppListFolderView::Layout() {
121  CalculateIdealBounds();
122  views::ViewModelUtils::SetViewBoundsToIdealBounds(*view_model_);
123}
124
125bool AppListFolderView::OnKeyPressed(const ui::KeyEvent& event) {
126  return items_grid_view_->OnKeyPressed(event);
127}
128
129void AppListFolderView::OnAppListItemWillBeDeleted(AppListItem* item) {
130  if (item == folder_item_) {
131    items_grid_view_->OnFolderItemRemoved();
132    folder_header_view_->OnFolderItemRemoved();
133    folder_item_ = NULL;
134
135    // Do not change state if it is hidden.
136    if (hide_for_reparent_ || layer()->opacity() == 0.0f)
137      return;
138
139    // If the folder item associated with this view is removed from the model,
140    // (e.g. the last item in the folder was deleted), reset the view and signal
141    // the container view to show the app list instead.
142    // Pass NULL to ShowApps() to avoid triggering animation from the deleted
143    // folder.
144    container_view_->ShowApps(NULL);
145  }
146}
147
148void AppListFolderView::OnImplicitAnimationsCompleted() {
149  // Show the top items when the opening folder animation is done.
150  if (layer()->opacity() == 1.0f)
151    items_grid_view_->SetTopItemViewsVisible(true);
152
153  // If the view is hidden for reparenting a folder item, it has to be visible,
154  // so that drag_view_ can keep receiving mouse events.
155  if (layer()->opacity() == 0.0f && !hide_for_reparent_)
156    SetVisible(false);
157
158  // Set the view bounds to a small rect, so that it won't overlap the root
159  // level apps grid view during folder item reprenting transitional period.
160  if (hide_for_reparent_)
161    SetBoundsRect(gfx::Rect(bounds().x(), bounds().y(), 1, 1));
162}
163
164void AppListFolderView::CalculateIdealBounds() {
165  gfx::Rect rect(GetContentsBounds());
166  if (rect.IsEmpty())
167    return;
168
169  gfx::Rect header_frame(rect);
170  gfx::Size size = folder_header_view_->GetPreferredSize();
171  header_frame.set_height(size.height());
172  view_model_->set_ideal_bounds(kIndexFolderHeader, header_frame);
173
174  gfx::Rect grid_frame(rect);
175  grid_frame.Subtract(header_frame);
176  view_model_->set_ideal_bounds(kIndexChildItems, grid_frame);
177}
178
179void AppListFolderView::StartSetupDragInRootLevelAppsGridView(
180    AppListItemView* original_drag_view,
181    const gfx::Point& drag_point_in_root_grid) {
182  // Converts the original_drag_view's bounds to the coordinate system of
183  // root level grid view.
184  gfx::RectF rect_f(original_drag_view->bounds());
185  views::View::ConvertRectToTarget(items_grid_view_,
186                                   container_view_->apps_grid_view(),
187                                   &rect_f);
188  gfx::Rect rect_in_root_grid_view = gfx::ToEnclosingRect(rect_f);
189
190  container_view_->apps_grid_view()->
191      InitiateDragFromReparentItemInRootLevelGridView(
192          original_drag_view, rect_in_root_grid_view, drag_point_in_root_grid);
193}
194
195gfx::Rect AppListFolderView::GetItemIconBoundsAt(int index) {
196  AppListItemView* item_view = items_grid_view_->GetItemViewAt(index);
197  // Icon bounds relative to AppListItemView.
198  const gfx::Rect icon_bounds = item_view->GetIconBounds();
199  gfx::Rect to_apps_grid_view = item_view->ConvertRectToParent(icon_bounds);
200  gfx::Rect to_folder =
201      items_grid_view_->ConvertRectToParent(to_apps_grid_view);
202
203  // Get the icon image's bound.
204  to_folder.ClampToCenteredSize(
205      gfx::Size(kGridIconDimension, kGridIconDimension));
206
207  return to_folder;
208}
209
210void AppListFolderView::UpdateFolderViewBackground(bool show_bubble) {
211  if (hide_for_reparent_)
212    return;
213
214  // Before showing the folder container inking bubble, hide the folder name.
215  if (show_bubble)
216    UpdateFolderNameVisibility(false);
217
218  container_view_->folder_background_view()->UpdateFolderContainerBubble(
219      show_bubble ? FolderBackgroundView::SHOW_BUBBLE :
220                    FolderBackgroundView::HIDE_BUBBLE);
221}
222
223void AppListFolderView::UpdateFolderNameVisibility(bool visible) {
224  folder_header_view_->UpdateFolderNameVisibility(visible);
225}
226
227bool AppListFolderView::IsPointOutsideOfFolderBoundary(
228    const gfx::Point& point) {
229  if (!GetLocalBounds().Contains(point))
230    return true;
231
232  gfx::Point center = GetLocalBounds().CenterPoint();
233  float delta = (point - center).Length();
234  return delta > container_view_->folder_background_view()->
235      GetFolderContainerBubbleRadius() + kOutOfFolderContainerBubbleDelta;
236}
237
238// When user drags a folder item out of the folder boundary ink bubble, the
239// folder view UI will be hidden, and switch back to top level AppsGridView.
240// The dragged item will seamlessly move on the top level AppsGridView.
241// In order to achieve the above, we keep the folder view and its child grid
242// view visible with opacity 0, so that the drag_view_ on the hidden grid view
243// will keep receiving mouse event. At the same time, we initiated a new
244// drag_view_ in the top level grid view, and keep it moving with the hidden
245// grid view's drag_view_, so that the dragged item can be engaged in drag and
246// drop flow in the top level grid view. During the reparenting process, the
247// drag_view_ in hidden grid view will dispatch the drag and drop event to
248// the top level grid view, until the drag ends.
249void AppListFolderView::ReparentItem(
250    AppListItemView* original_drag_view,
251    const gfx::Point& drag_point_in_folder_grid) {
252  // Convert the drag point relative to the root level AppsGridView.
253  gfx::Point to_root_level_grid = drag_point_in_folder_grid;
254  ConvertPointToTarget(items_grid_view_,
255                       container_view_->apps_grid_view(),
256                       &to_root_level_grid);
257  StartSetupDragInRootLevelAppsGridView(original_drag_view, to_root_level_grid);
258  container_view_->ReparentFolderItemTransit(folder_item_);
259}
260
261void AppListFolderView::DispatchDragEventForReparent(
262    AppsGridView::Pointer pointer,
263    const gfx::Point& drag_point_in_folder_grid) {
264  AppsGridView* root_grid = container_view_->apps_grid_view();
265  gfx::Point drag_point_in_root_grid = drag_point_in_folder_grid;
266  ConvertPointToTarget(items_grid_view_, root_grid, &drag_point_in_root_grid);
267  root_grid->UpdateDragFromReparentItem(pointer, drag_point_in_folder_grid);
268}
269
270void AppListFolderView::DispatchEndDragEventForReparent(
271    bool events_forwarded_to_drag_drop_host,
272    bool cancel_drag) {
273  container_view_->apps_grid_view()->EndDragFromReparentItemInRootLevel(
274      events_forwarded_to_drag_drop_host, cancel_drag);
275}
276
277void AppListFolderView::HideViewImmediately() {
278  SetVisible(false);
279  hide_for_reparent_ = false;
280}
281
282void AppListFolderView::CloseFolderPage() {
283  accessible_name_ = ui::ResourceBundle::GetSharedInstance().GetLocalizedString(
284      IDS_APP_LIST_FOLDER_CLOSE_FOLDER_ACCESSIBILE_NAME);
285  NotifyAccessibilityEvent(ui::AX_EVENT_ALERT, true);
286
287  GiveBackFocusToSearchBox();
288  if (items_grid_view()->dragging())
289    items_grid_view()->EndDrag(true);
290  items_grid_view()->ClearAnySelectedView();
291  container_view_->ShowApps(folder_item_);
292}
293
294bool AppListFolderView::IsOEMFolder() const {
295  return folder_item_->folder_type() == AppListFolderItem::FOLDER_TYPE_OEM;
296}
297
298void AppListFolderView::SetRootLevelDragViewVisible(bool visible) {
299  container_view_->apps_grid_view()->SetDragViewVisible(visible);
300}
301
302void AppListFolderView::GetAccessibleState(ui::AXViewState* state) {
303  state->role = ui::AX_ROLE_BUTTON;
304  state->name = accessible_name_;
305}
306
307void AppListFolderView::NavigateBack(AppListFolderItem* item,
308                                     const ui::Event& event_flags) {
309  CloseFolderPage();
310}
311
312void AppListFolderView::GiveBackFocusToSearchBox() {
313  app_list_main_view_->search_box_view()->search_box()->RequestFocus();
314}
315
316void AppListFolderView::SetItemName(AppListFolderItem* item,
317                                    const std::string& name) {
318  model_->SetItemName(item, name);
319}
320
321}  // namespace app_list
322