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