ui/views/touchui/touch_selection_controller_impl.cc

   1 // Copyright (c) 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/views/touchui/touch_selection_controller_impl.h"
   6
   7 #include "base/time/time.h"
   8 #include "grit/ui_resources.h"
   9 #include "grit/ui_strings.h"
  10 #include "ui/aura/client/cursor_client.h"
  11 #include "ui/aura/env.h"
  12 #include "ui/base/resource/resource_bundle.h"
  13 #include "ui/gfx/canvas.h"
  14 #include "ui/gfx/image/image.h"
  15 #include "ui/gfx/path.h"
  16 #include "ui/gfx/rect.h"
  17 #include "ui/gfx/screen.h"
  18 #include "ui/gfx/size.h"
  19 #include "ui/views/widget/widget.h"
  20 #include "ui/wm/core/masked_window_targeter.h"
  21 #include "ui/wm/core/shadow_types.h"
  22 #include "ui/wm/core/window_animations.h"
  23
  24 namespace {
  25
  26 // Constants defining the visual attributes of selection handles
  27 const int kSelectionHandleLineWidth = 1;
  28 const SkColor kSelectionHandleLineColor =
  29     SkColorSetRGB(0x42, 0x81, 0xf4);
  30
  31 // When a handle is dragged, the drag position reported to the client view is
  32 // offset vertically to represent the cursor position. This constant specifies
  33 // the offset in  pixels above the "O" (see pic below). This is required because
  34 // say if this is zero, that means the drag position we report is the point
  35 // right above the "O" or the bottom most point of the cursor "|". In that case,
  36 // a vertical movement of even one pixel will make the handle jump to the line
  37 // below it. So when the user just starts dragging, the handle will jump to the
  38 // next line if the user makes any vertical movement. It is correct but
  39 // looks/feels weird. So we have this non-zero offset to prevent this jumping.
  40 //
  41 // Editing handle widget showing the difference between the position of the
  42 // ET_GESTURE_SCROLL_UPDATE event and the drag position reported to the client:
  43 //                                  _____
  44 //                                 |  |<-|---- Drag position reported to client
  45 //                              _  |  O  |
  46 //          Vertical Padding __|   |   <-|---- ET_GESTURE_SCROLL_UPDATE position
  47 //                             |_  |_____|<--- Editing handle widget
  48 //
  49 //                                 | |
  50 //                                  T
  51 //                          Horizontal Padding
  52 //
  53 const int kSelectionHandleVerticalDragOffset = 5;
  54
  55 // Padding around the selection handle defining the area that will be included
  56 // in the touch target to make dragging the handle easier (see pic above).
  57 const int kSelectionHandleHorizPadding = 10;
  58 const int kSelectionHandleVertPadding = 20;
  59
  60 const int kContextMenuTimoutMs = 200;
  61
  62 const int kSelectionHandleQuickFadeDurationMs = 50;
  63
  64 // Minimum height for selection handle bar. If the bar height is going to be
  65 // less than this value, handle will not be shown.
  66 const int kSelectionHandleBarMinHeight = 5;
  67 // Maximum amount that selection handle bar can stick out of client view's
  68 // boundaries.
  69 const int kSelectionHandleBarBottomAllowance = 3;
  70
  71 // Creates a widget to host SelectionHandleView.
  72 views::Widget* CreateTouchSelectionPopupWidget(
  73     gfx::NativeView context,
  74     views::WidgetDelegate* widget_delegate) {
  75   views::Widget* widget = new views::Widget;
  76   views::Widget::InitParams params(views::Widget::InitParams::TYPE_POPUP);
  77   params.opacity = views::Widget::InitParams::TRANSLUCENT_WINDOW;
  78   params.ownership = views::Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
  79   params.parent = context;
  80   params.delegate = widget_delegate;
  81   widget->Init(params);
  82   SetShadowType(widget->GetNativeView(), wm::SHADOW_TYPE_NONE);
  83   return widget;
  84 }
  85
  86 gfx::Image* GetHandleImage() {
  87   static gfx::Image* handle_image = NULL;
  88   if (!handle_image) {
  89     handle_image = &ui::ResourceBundle::GetSharedInstance().GetImageNamed(
  90         IDR_TEXT_SELECTION_HANDLE);
  91   }
  92   return handle_image;
  93 }
  94
  95 gfx::Size GetHandleImageSize() {
  96   return GetHandleImage()->Size();
  97 }
  98
  99 // Cannot use gfx::UnionRect since it does not work for empty rects.
 100 gfx::Rect Union(const gfx::Rect& r1, const gfx::Rect& r2) {
 101   int rx = std::min(r1.x(), r2.x());
 102   int ry = std::min(r1.y(), r2.y());
 103   int rr = std::max(r1.right(), r2.right());
 104   int rb = std::max(r1.bottom(), r2.bottom());
 105
 106   return gfx::Rect(rx, ry, rr - rx, rb - ry);
 107 }
 108
 109 // Convenience methods to convert a |rect| from screen to the |client|'s
 110 // coordinate system and vice versa.
 111 // Note that this is not quite correct because it does not take into account
 112 // transforms such as rotation and scaling. This should be in TouchEditable.
 113 // TODO(varunjain): Fix this.
 114 gfx::Rect ConvertFromScreen(ui::TouchEditable* client, const gfx::Rect& rect) {
 115   gfx::Point origin = rect.origin();
 116   client->ConvertPointFromScreen(&origin);
 117   return gfx::Rect(origin, rect.size());
 118 }
 119 gfx::Rect ConvertToScreen(ui::TouchEditable* client, const gfx::Rect& rect) {
 120   gfx::Point origin = rect.origin();
 121   client->ConvertPointToScreen(&origin);
 122   return gfx::Rect(origin, rect.size());
 123 }
 124
 125 }  // namespace
 126
 127 namespace views {
 128
 129 typedef TouchSelectionControllerImpl::EditingHandleView EditingHandleView;
 130
 131 class TouchHandleWindowTargeter : public wm::MaskedWindowTargeter {
 132  public:
 133   TouchHandleWindowTargeter(aura::Window* window,
 134                             EditingHandleView* handle_view);
 135
 136   virtual ~TouchHandleWindowTargeter() {}
 137
 138  private:
 139   // wm::MaskedWindowTargeter:
 140   virtual bool GetHitTestMask(aura::Window* window,
 141                               gfx::Path* mask) const OVERRIDE;
 142
 143   EditingHandleView* handle_view_;
 144
 145   DISALLOW_COPY_AND_ASSIGN(TouchHandleWindowTargeter);
 146 };
 147
 148 // A View that displays the text selection handle.
 149 class TouchSelectionControllerImpl::EditingHandleView
 150     : public views::WidgetDelegateView {
 151  public:
 152   EditingHandleView(TouchSelectionControllerImpl* controller,
 153                     gfx::NativeView context)
 154       : controller_(controller),
 155         drag_offset_(0),
 156         draw_invisible_(false) {
 157     widget_.reset(CreateTouchSelectionPopupWidget(context, this));
 158     widget_->SetContentsView(this);
 159
 160     aura::Window* window = widget_->GetNativeWindow();
 161     window->SetEventTargeter(scoped_ptr<ui::EventTargeter>(
 162         new TouchHandleWindowTargeter(window, this)));
 163
 164     // We are owned by the TouchSelectionController.
 165     set_owned_by_client();
 166   }
 167
 168   virtual ~EditingHandleView() {
 169     SetWidgetVisible(false, false);
 170   }
 171
 172   // Overridden from views::WidgetDelegateView:
 173   virtual bool WidgetHasHitTestMask() const OVERRIDE {
 174     return true;
 175   }
 176
 177   virtual void GetWidgetHitTestMask(gfx::Path* mask) const OVERRIDE {
 178     gfx::Size image_size = GetHandleImageSize();
 179     mask->addRect(SkIntToScalar(0), SkIntToScalar(selection_rect_.height()),
 180         SkIntToScalar(image_size.width()) + 2 * kSelectionHandleHorizPadding,
 181         SkIntToScalar(selection_rect_.height() + image_size.height() +
 182             kSelectionHandleVertPadding));
 183   }
 184
 185   virtual void DeleteDelegate() OVERRIDE {
 186     // We are owned and deleted by TouchSelectionController.
 187   }
 188
 189   // Overridden from views::View:
 190   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE {
 191     if (draw_invisible_)
 192       return;
 193     gfx::Size image_size = GetHandleImageSize();
 194     int cursor_pos_x = image_size.width() / 2 - kSelectionHandleLineWidth +
 195         kSelectionHandleHorizPadding;
 196
 197     // Draw the cursor line.
 198     canvas->FillRect(
 199         gfx::Rect(cursor_pos_x, 0,
 200                   2 * kSelectionHandleLineWidth + 1, selection_rect_.height()),
 201         kSelectionHandleLineColor);
 202
 203     // Draw the handle image.
 204     canvas->DrawImageInt(*GetHandleImage()->ToImageSkia(),
 205         kSelectionHandleHorizPadding, selection_rect_.height());
 206   }
 207
 208   virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE {
 209     event->SetHandled();
 210     switch (event->type()) {
 211       case ui::ET_GESTURE_SCROLL_BEGIN:
 212         widget_->SetCapture(this);
 213         controller_->SetDraggingHandle(this);
 214         drag_offset_ = event->y() - selection_rect_.height() +
 215             kSelectionHandleVerticalDragOffset;
 216         break;
 217       case ui::ET_GESTURE_SCROLL_UPDATE: {
 218         gfx::Point drag_pos(event->location().x(),
 219             event->location().y() - drag_offset_);
 220         controller_->SelectionHandleDragged(drag_pos);
 221         break;
 222       }
 223       case ui::ET_GESTURE_SCROLL_END:
 224       case ui::ET_SCROLL_FLING_START:
 225         widget_->ReleaseCapture();
 226         controller_->SetDraggingHandle(NULL);
 227         break;
 228       default:
 229         break;
 230     }
 231   }
 232
 233   virtual gfx::Size GetPreferredSize() OVERRIDE {
 234     gfx::Size image_size = GetHandleImageSize();
 235     return gfx::Size(image_size.width() + 2 * kSelectionHandleHorizPadding,
 236                      image_size.height() + selection_rect_.height() +
 237                          kSelectionHandleVertPadding);
 238   }
 239
 240   bool IsWidgetVisible() const {
 241     return widget_->IsVisible();
 242   }
 243
 244   void SetWidgetVisible(bool visible, bool quick) {
 245     if (widget_->IsVisible() == visible)
 246       return;
 247     wm::SetWindowVisibilityAnimationDuration(
 248         widget_->GetNativeView(),
 249         base::TimeDelta::FromMilliseconds(
 250             quick ? kSelectionHandleQuickFadeDurationMs : 0));
 251     if (visible)
 252       widget_->Show();
 253     else
 254       widget_->Hide();
 255   }
 256
 257   void SetSelectionRectInScreen(const gfx::Rect& rect) {
 258     gfx::Size image_size = GetHandleImageSize();
 259     selection_rect_ = rect;
 260     gfx::Rect widget_bounds(
 261         rect.x() - image_size.width() / 2 - kSelectionHandleHorizPadding,
 262         rect.y(),
 263         image_size.width() + 2 * kSelectionHandleHorizPadding,
 264         rect.height() + image_size.height() + kSelectionHandleVertPadding);
 265     widget_->SetBounds(widget_bounds);
 266   }
 267
 268   gfx::Point GetScreenPosition() {
 269     return widget_->GetClientAreaBoundsInScreen().origin();
 270   }
 271
 272   void SetDrawInvisible(bool draw_invisible) {
 273     if (draw_invisible_ == draw_invisible)
 274       return;
 275     draw_invisible_ = draw_invisible;
 276     SchedulePaint();
 277   }
 278
 279   const gfx::Rect& selection_rect() const { return selection_rect_; }
 280
 281  private:
 282   scoped_ptr<Widget> widget_;
 283   TouchSelectionControllerImpl* controller_;
 284   gfx::Rect selection_rect_;
 285
 286   // Vertical offset between the scroll event position and the drag position
 287   // reported to the client view (see the ASCII figure at the top of the file
 288   // and its description for more details).
 289   int drag_offset_;
 290
 291   // If set to true, the handle will not draw anything, hence providing an empty
 292   // widget. We need this because we may want to stop showing the handle while
 293   // it is being dragged. Since it is being dragged, we cannot destroy the
 294   // handle.
 295   bool draw_invisible_;
 296
 297   DISALLOW_COPY_AND_ASSIGN(EditingHandleView);
 298 };
 299
 300 TouchHandleWindowTargeter::TouchHandleWindowTargeter(
 301     aura::Window* window,
 302     EditingHandleView* handle_view)
 303     : wm::MaskedWindowTargeter(window),
 304       handle_view_(handle_view) {
 305 }
 306
 307 bool TouchHandleWindowTargeter::GetHitTestMask(aura::Window* window,
 308                                                gfx::Path* mask) const {
 309   const gfx::Rect& selection_rect = handle_view_->selection_rect();
 310   gfx::Size image_size = GetHandleImageSize();
 311   mask->addRect(SkIntToScalar(0), SkIntToScalar(selection_rect.height()),
 312       SkIntToScalar(image_size.width()) + 2 * kSelectionHandleHorizPadding,
 313       SkIntToScalar(selection_rect.height() + image_size.height() +
 314                     kSelectionHandleVertPadding));
 315   return true;
 316 }
 317
 318 TouchSelectionControllerImpl::TouchSelectionControllerImpl(
 319     ui::TouchEditable* client_view)
 320     : client_view_(client_view),
 321       client_widget_(NULL),
 322       selection_handle_1_(new EditingHandleView(this,
 323                           client_view->GetNativeView())),
 324       selection_handle_2_(new EditingHandleView(this,
 325                           client_view->GetNativeView())),
 326       cursor_handle_(new EditingHandleView(this,
 327                      client_view->GetNativeView())),
 328       context_menu_(NULL),
 329       dragging_handle_(NULL) {
 330   client_widget_ = Widget::GetTopLevelWidgetForNativeView(
 331       client_view_->GetNativeView());
 332   if (client_widget_)
 333     client_widget_->AddObserver(this);
 334   aura::Env::GetInstance()->AddPreTargetHandler(this);
 335 }
 336
 337 TouchSelectionControllerImpl::~TouchSelectionControllerImpl() {
 338   HideContextMenu();
 339   aura::Env::GetInstance()->RemovePreTargetHandler(this);
 340   if (client_widget_)
 341     client_widget_->RemoveObserver(this);
 342 }
 343
 344 void TouchSelectionControllerImpl::SelectionChanged() {
 345   gfx::Rect r1, r2;
 346   client_view_->GetSelectionEndPoints(&r1, &r2);
 347   gfx::Rect screen_rect_1 = ConvertToScreen(client_view_, r1);
 348   gfx::Rect screen_rect_2 = ConvertToScreen(client_view_, r2);
 349   gfx::Rect client_bounds = client_view_->GetBounds();
 350   if (r1.y() < client_bounds.y())
 351     r1.Inset(0, client_bounds.y() - r1.y(), 0, 0);
 352   if (r2.y() < client_bounds.y())
 353     r2.Inset(0, client_bounds.y() - r2.y(), 0, 0);
 354   gfx::Rect screen_rect_1_clipped = ConvertToScreen(client_view_, r1);
 355   gfx::Rect screen_rect_2_clipped = ConvertToScreen(client_view_, r2);
 356   if (screen_rect_1_clipped == selection_end_point_1_clipped_ &&
 357       screen_rect_2_clipped == selection_end_point_2_clipped_)
 358     return;
 359
 360   selection_end_point_1_ = screen_rect_1;
 361   selection_end_point_2_ = screen_rect_2;
 362   selection_end_point_1_clipped_ = screen_rect_1_clipped;
 363   selection_end_point_2_clipped_ = screen_rect_2_clipped;
 364
 365   if (client_view_->DrawsHandles()) {
 366     UpdateContextMenu();
 367     return;
 368   }
 369   if (dragging_handle_) {
 370     // We need to reposition only the selection handle that is being dragged.
 371     // The other handle stays the same. Also, the selection handle being dragged
 372     // will always be at the end of selection, while the other handle will be at
 373     // the start.
 374     // If the new location of this handle is out of client view, its widget
 375     // should not get hidden, since it should still receive touch events.
 376     // Hence, we are not using |SetHandleSelectionRect()| method here.
 377     dragging_handle_->SetSelectionRectInScreen(screen_rect_2_clipped);
 378
 379     // Temporary fix for selection handle going outside a window. On a webpage,
 380     // the page should scroll if the selection handle is dragged outside the
 381     // window. That does not happen currently. So we just hide the handle for
 382     // now.
 383     // TODO(varunjain): Fix this: crbug.com/269003
 384     dragging_handle_->SetDrawInvisible(!ShouldShowHandleFor(r2));
 385
 386     if (dragging_handle_ != cursor_handle_.get()) {
 387       // The non-dragging-handle might have recently become visible.
 388       EditingHandleView* non_dragging_handle = selection_handle_1_.get();
 389       if (dragging_handle_ == selection_handle_1_) {
 390         non_dragging_handle = selection_handle_2_.get();
 391         // if handle 1 is being dragged, it is corresponding to the end of
 392         // selection and the other handle to the start of selection.
 393         selection_end_point_1_ = screen_rect_2;
 394         selection_end_point_2_ = screen_rect_1;
 395         selection_end_point_1_clipped_ = screen_rect_2_clipped;
 396         selection_end_point_2_clipped_ = screen_rect_1_clipped;
 397       }
 398       SetHandleSelectionRect(non_dragging_handle, r1, screen_rect_1_clipped);
 399     }
 400   } else {
 401     UpdateContextMenu();
 402
 403     // Check if there is any selection at all.
 404     if (screen_rect_1.origin() == screen_rect_2.origin()) {
 405       selection_handle_1_->SetWidgetVisible(false, false);
 406       selection_handle_2_->SetWidgetVisible(false, false);
 407       SetHandleSelectionRect(cursor_handle_.get(), r1, screen_rect_1_clipped);
 408       return;
 409     }
 410
 411     cursor_handle_->SetWidgetVisible(false, false);
 412     SetHandleSelectionRect(selection_handle_1_.get(), r1,
 413                            screen_rect_1_clipped);
 414     SetHandleSelectionRect(selection_handle_2_.get(), r2,
 415                            screen_rect_2_clipped);
 416   }
 417 }
 418
 419 bool TouchSelectionControllerImpl::IsHandleDragInProgress() {
 420   return !!dragging_handle_;
 421 }
 422
 423 void TouchSelectionControllerImpl::HideHandles(bool quick) {
 424   selection_handle_1_->SetWidgetVisible(false, quick);
 425   selection_handle_2_->SetWidgetVisible(false, quick);
 426   cursor_handle_->SetWidgetVisible(false, quick);
 427 }
 428
 429 void TouchSelectionControllerImpl::SetDraggingHandle(
 430     EditingHandleView* handle) {
 431   dragging_handle_ = handle;
 432   if (dragging_handle_)
 433     HideContextMenu();
 434   else
 435     StartContextMenuTimer();
 436 }
 437
 438 void TouchSelectionControllerImpl::SelectionHandleDragged(
 439     const gfx::Point& drag_pos) {
 440   // We do not want to show the context menu while dragging.
 441   HideContextMenu();
 442
 443   DCHECK(dragging_handle_);
 444   gfx::Point drag_pos_in_client = drag_pos;
 445   ConvertPointToClientView(dragging_handle_, &drag_pos_in_client);
 446
 447   if (dragging_handle_ == cursor_handle_.get()) {
 448     client_view_->MoveCaretTo(drag_pos_in_client);
 449     return;
 450   }
 451
 452   // Find the stationary selection handle.
 453   gfx::Rect fixed_handle_rect = selection_end_point_1_;
 454   if (selection_handle_1_ == dragging_handle_)
 455     fixed_handle_rect = selection_end_point_2_;
 456
 457   // Find selection end points in client_view's coordinate system.
 458   gfx::Point p2 = fixed_handle_rect.origin();
 459   p2.Offset(0, fixed_handle_rect.height() / 2);
 460   client_view_->ConvertPointFromScreen(&p2);
 461
 462   // Instruct client_view to select the region between p1 and p2. The position
 463   // of |fixed_handle| is the start and that of |dragging_handle| is the end
 464   // of selection.
 465   client_view_->SelectRect(p2, drag_pos_in_client);
 466 }
 467
 468 void TouchSelectionControllerImpl::ConvertPointToClientView(
 469     EditingHandleView* source, gfx::Point* point) {
 470   View::ConvertPointToScreen(source, point);
 471   client_view_->ConvertPointFromScreen(point);
 472 }
 473
 474 void TouchSelectionControllerImpl::SetHandleSelectionRect(
 475     EditingHandleView* handle,
 476     const gfx::Rect& rect,
 477     const gfx::Rect& rect_in_screen) {
 478   handle->SetWidgetVisible(ShouldShowHandleFor(rect), false);
 479   if (handle->IsWidgetVisible())
 480     handle->SetSelectionRectInScreen(rect_in_screen);
 481 }
 482
 483 bool TouchSelectionControllerImpl::ShouldShowHandleFor(
 484     const gfx::Rect& rect) const {
 485   if (rect.height() < kSelectionHandleBarMinHeight)
 486     return false;
 487   gfx::Rect bounds = client_view_->GetBounds();
 488   bounds.Inset(0, 0, 0, -kSelectionHandleBarBottomAllowance);
 489   return bounds.Contains(rect);
 490 }
 491
 492 bool TouchSelectionControllerImpl::IsCommandIdEnabled(int command_id) const {
 493   return client_view_->IsCommandIdEnabled(command_id);
 494 }
 495
 496 void TouchSelectionControllerImpl::ExecuteCommand(int command_id,
 497                                                   int event_flags) {
 498   HideContextMenu();
 499   client_view_->ExecuteCommand(command_id, event_flags);
 500 }
 501
 502 void TouchSelectionControllerImpl::OpenContextMenu() {
 503   // Context menu should appear centered on top of the selected region.
 504   const gfx::Rect rect = context_menu_->GetAnchorRect();
 505   const gfx::Point anchor(rect.CenterPoint().x(), rect.y());
 506   HideContextMenu();
 507   client_view_->OpenContextMenu(anchor);
 508 }
 509
 510 void TouchSelectionControllerImpl::OnMenuClosed(TouchEditingMenuView* menu) {
 511   if (menu == context_menu_)
 512     context_menu_ = NULL;
 513 }
 514
 515 void TouchSelectionControllerImpl::OnWidgetClosing(Widget* widget) {
 516   DCHECK_EQ(client_widget_, widget);
 517   client_widget_ = NULL;
 518 }
 519
 520 void TouchSelectionControllerImpl::OnWidgetBoundsChanged(
 521     Widget* widget,
 522     const gfx::Rect& new_bounds) {
 523   DCHECK_EQ(client_widget_, widget);
 524   HideContextMenu();
 525   SelectionChanged();
 526 }
 527
 528 void TouchSelectionControllerImpl::OnKeyEvent(ui::KeyEvent* event) {
 529   client_view_->DestroyTouchSelection();
 530 }
 531
 532 void TouchSelectionControllerImpl::OnMouseEvent(ui::MouseEvent* event) {
 533   aura::client::CursorClient* cursor_client = aura::client::GetCursorClient(
 534       client_view_->GetNativeView()->GetRootWindow());
 535   if (!cursor_client || cursor_client->IsMouseEventsEnabled())
 536     client_view_->DestroyTouchSelection();
 537 }
 538
 539 void TouchSelectionControllerImpl::OnScrollEvent(ui::ScrollEvent* event) {
 540   client_view_->DestroyTouchSelection();
 541 }
 542
 543 void TouchSelectionControllerImpl::ContextMenuTimerFired() {
 544   // Get selection end points in client_view's space.
 545   gfx::Rect end_rect_1_in_screen;
 546   gfx::Rect end_rect_2_in_screen;
 547   if (cursor_handle_->IsWidgetVisible()) {
 548     end_rect_1_in_screen = selection_end_point_1_clipped_;
 549     end_rect_2_in_screen = end_rect_1_in_screen;
 550   } else {
 551     end_rect_1_in_screen = selection_end_point_1_clipped_;
 552     end_rect_2_in_screen = selection_end_point_2_clipped_;
 553   }
 554
 555   // Convert from screen to client.
 556   gfx::Rect end_rect_1(ConvertFromScreen(client_view_, end_rect_1_in_screen));
 557   gfx::Rect end_rect_2(ConvertFromScreen(client_view_, end_rect_2_in_screen));
 558
 559   // if selection is completely inside the view, we display the context menu
 560   // in the middle of the end points on the top. Else, we show it above the
 561   // visible handle. If no handle is visible, we do not show the menu.
 562   gfx::Rect menu_anchor;
 563   if (ShouldShowHandleFor(end_rect_1) &&
 564       ShouldShowHandleFor(end_rect_2))
 565     menu_anchor = Union(end_rect_1_in_screen,end_rect_2_in_screen);
 566   else if (ShouldShowHandleFor(end_rect_1))
 567     menu_anchor = end_rect_1_in_screen;
 568   else if (ShouldShowHandleFor(end_rect_2))
 569     menu_anchor = end_rect_2_in_screen;
 570   else
 571     return;
 572
 573   DCHECK(!context_menu_);
 574   context_menu_ = TouchEditingMenuView::Create(this, menu_anchor,
 575                                                GetHandleImageSize(),
 576                                                client_view_->GetNativeView());
 577 }
 578
 579 void TouchSelectionControllerImpl::StartContextMenuTimer() {
 580   if (context_menu_timer_.IsRunning())
 581     return;
 582   context_menu_timer_.Start(
 583       FROM_HERE,
 584       base::TimeDelta::FromMilliseconds(kContextMenuTimoutMs),
 585       this,
 586       &TouchSelectionControllerImpl::ContextMenuTimerFired);
 587 }
 588
 589 void TouchSelectionControllerImpl::UpdateContextMenu() {
 590   // Hide context menu to be shown when the timer fires.
 591   HideContextMenu();
 592   StartContextMenuTimer();
 593 }
 594
 595 void TouchSelectionControllerImpl::HideContextMenu() {
 596   if (context_menu_)
 597     context_menu_->Close();
 598   context_menu_ = NULL;
 599   context_menu_timer_.Stop();
 600 }
 601
 602 gfx::NativeView TouchSelectionControllerImpl::GetCursorHandleNativeView() {
 603   return cursor_handle_->GetWidget()->GetNativeView();
 604 }
 605
 606 gfx::Point TouchSelectionControllerImpl::GetSelectionHandle1Position() {
 607   return selection_handle_1_->GetScreenPosition();
 608 }
 609
 610 gfx::Point TouchSelectionControllerImpl::GetSelectionHandle2Position() {
 611   return selection_handle_2_->GetScreenPosition();
 612 }
 613
 614 gfx::Point TouchSelectionControllerImpl::GetCursorHandlePosition() {
 615   return cursor_handle_->GetScreenPosition();
 616 }
 617
 618 bool TouchSelectionControllerImpl::IsSelectionHandle1Visible() {
 619   return selection_handle_1_->IsWidgetVisible();
 620 }
 621
 622 bool TouchSelectionControllerImpl::IsSelectionHandle2Visible() {
 623   return selection_handle_2_->IsWidgetVisible();
 624 }
 625
 626 bool TouchSelectionControllerImpl::IsCursorHandleVisible() {
 627   return cursor_handle_->IsWidgetVisible();
 628 }
 629
 630 }  // namespace views