src/content/browser/web_contents/touch_editable_impl_aura.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 "content/browser/web_contents/touch_editable_impl_aura.h"
   6
   7 #include "content/browser/renderer_host/render_widget_host_impl.h"
   8 #include "content/browser/renderer_host/render_widget_host_view_aura.h"
   9 #include "content/browser/web_contents/web_contents_impl.h"
  10 #include "content/common/view_messages.h"
  11 #include "content/public/browser/render_view_host.h"
  12 #include "content/public/browser/render_widget_host.h"
  13 #include "grit/ui_strings.h"
  14 #include "ui/aura/client/screen_position_client.h"
  15 #include "ui/aura/window.h"
  16 #include "ui/aura/window_tree_host.h"
  17 #include "ui/base/clipboard/clipboard.h"
  18 #include "ui/base/ui_base_switches_util.h"
  19 #include "ui/gfx/range/range.h"
  20 #include "ui/wm/public/activation_client.h"
  21
  22 namespace content {
  23
  24 ////////////////////////////////////////////////////////////////////////////////
  25 // TouchEditableImplAura, public:
  26
  27 TouchEditableImplAura::~TouchEditableImplAura() {
  28   Cleanup();
  29 }
  30
  31 // static
  32 TouchEditableImplAura* TouchEditableImplAura::Create() {
  33   if (switches::IsTouchEditingEnabled())
  34     return new TouchEditableImplAura();
  35   return NULL;
  36 }
  37
  38 void TouchEditableImplAura::AttachToView(RenderWidgetHostViewAura* view) {
  39   if (rwhva_ == view)
  40     return;
  41
  42   Cleanup();
  43   if (!view)
  44     return;
  45
  46   rwhva_ = view;
  47   rwhva_->set_touch_editing_client(this);
  48 }
  49
  50 void TouchEditableImplAura::UpdateEditingController() {
  51   if (!rwhva_ || !rwhva_->HasFocus())
  52     return;
  53
  54   if (text_input_type_ != ui::TEXT_INPUT_TYPE_NONE ||
  55       selection_anchor_rect_ != selection_focus_rect_) {
  56     if (touch_selection_controller_)
  57       touch_selection_controller_->SelectionChanged();
  58   } else {
  59     EndTouchEditing(false);
  60   }
  61 }
  62
  63 void TouchEditableImplAura::OverscrollStarted() {
  64   overscroll_in_progress_ = true;
  65 }
  66
  67 void TouchEditableImplAura::OverscrollCompleted() {
  68   // We might receive multiple OverscrollStarted() and OverscrollCompleted()
  69   // during the same scroll session (for example, when the scroll direction
  70   // changes). We want to show the handles only when:
  71   // 1. Overscroll has completed
  72   // 2. Scrolling session is over, i.e. we have received ET_GESTURE_SCROLL_END.
  73   // 3. If we had hidden the handles when scrolling started
  74   // 4. If there is still a need to show handles (there is a non-empty selection
  75   // or non-NONE |text_input_type_|)
  76   if (overscroll_in_progress_ && !scroll_in_progress_ &&
  77       handles_hidden_due_to_scroll_ &&
  78       (selection_anchor_rect_ != selection_focus_rect_ ||
  79           text_input_type_ != ui::TEXT_INPUT_TYPE_NONE)) {
  80     StartTouchEditing();
  81     UpdateEditingController();
  82   }
  83   overscroll_in_progress_ = false;
  84 }
  85
  86 ////////////////////////////////////////////////////////////////////////////////
  87 // TouchEditableImplAura, RenderWidgetHostViewAura::TouchEditingClient
  88 // implementation:
  89
  90 void TouchEditableImplAura::StartTouchEditing() {
  91   if (!rwhva_ || !rwhva_->HasFocus())
  92     return;
  93
  94   if (!touch_selection_controller_) {
  95     touch_selection_controller_.reset(
  96         ui::TouchSelectionController::create(this));
  97   }
  98   if (touch_selection_controller_)
  99     touch_selection_controller_->SelectionChanged();
 100 }
 101
 102 void TouchEditableImplAura::EndTouchEditing(bool quick) {
 103   if (touch_selection_controller_) {
 104     if (touch_selection_controller_->IsHandleDragInProgress()) {
 105       touch_selection_controller_->SelectionChanged();
 106     } else {
 107       touch_selection_controller_->HideHandles(quick);
 108       touch_selection_controller_.reset();
 109     }
 110   }
 111 }
 112
 113 void TouchEditableImplAura::OnSelectionOrCursorChanged(const gfx::Rect& anchor,
 114                                                        const gfx::Rect& focus) {
 115   selection_anchor_rect_ = anchor;
 116   selection_focus_rect_ = focus;
 117
 118   // If touch editing handles were not visible, we bring them up only if
 119   // there is non-zero selection on the page. And the current event is a
 120   // gesture event (we dont want to show handles if the user is selecting
 121   // using mouse or keyboard).
 122   if (selection_gesture_in_process_ && !scroll_in_progress_ &&
 123       !overscroll_in_progress_ &&
 124       selection_anchor_rect_ != selection_focus_rect_) {
 125     StartTouchEditing();
 126     selection_gesture_in_process_ = false;
 127   }
 128
 129   UpdateEditingController();
 130 }
 131
 132 void TouchEditableImplAura::OnTextInputTypeChanged(ui::TextInputType type) {
 133   text_input_type_ = type;
 134 }
 135
 136 bool TouchEditableImplAura::HandleInputEvent(const ui::Event* event) {
 137   DCHECK(rwhva_);
 138   if (event->IsTouchEvent())
 139     return false;
 140
 141   if (!event->IsGestureEvent()) {
 142     selection_gesture_in_process_ = false;
 143     EndTouchEditing(false);
 144     return false;
 145   }
 146
 147   const ui::GestureEvent* gesture_event =
 148       static_cast<const ui::GestureEvent*>(event);
 149   switch (event->type()) {
 150     case ui::ET_GESTURE_TAP:
 151       if (gesture_event->details().tap_count() > 1)
 152         selection_gesture_in_process_ = true;
 153       // When the user taps, we want to show touch editing handles if user
 154       // tapped on selected text.
 155       if (selection_anchor_rect_ != selection_focus_rect_) {
 156         // UnionRects only works for rects with non-zero width.
 157         gfx::Rect anchor(selection_anchor_rect_.origin(),
 158                          gfx::Size(1, selection_anchor_rect_.height()));
 159         gfx::Rect focus(selection_focus_rect_.origin(),
 160                         gfx::Size(1, selection_focus_rect_.height()));
 161         gfx::Rect selection_rect = gfx::UnionRects(anchor, focus);
 162         if (selection_rect.Contains(gesture_event->location())) {
 163           StartTouchEditing();
 164           return true;
 165         }
 166       }
 167       // For single taps, not inside selected region, we want to show handles
 168       // only when the tap is on an already focused textfield.
 169       textfield_was_focused_on_tap_ = false;
 170       if (gesture_event->details().tap_count() == 1 &&
 171           text_input_type_ != ui::TEXT_INPUT_TYPE_NONE)
 172         textfield_was_focused_on_tap_ = true;
 173       break;
 174     case ui::ET_GESTURE_LONG_PRESS:
 175       selection_gesture_in_process_ = true;
 176       break;
 177     case ui::ET_GESTURE_SCROLL_BEGIN:
 178       // If selection handles are currently visible, we want to get them back up
 179       // when scrolling ends. So we set |handles_hidden_due_to_scroll_| so that
 180       // we can re-start touch editing on scroll end gesture.
 181       scroll_in_progress_ = true;
 182       handles_hidden_due_to_scroll_ = false;
 183       if (touch_selection_controller_)
 184         handles_hidden_due_to_scroll_ = true;
 185       EndTouchEditing(true);
 186       break;
 187     case ui::ET_GESTURE_SCROLL_END:
 188       // Scroll has ended, but we might still be in overscroll animation.
 189       if (handles_hidden_due_to_scroll_ && !overscroll_in_progress_ &&
 190           (selection_anchor_rect_ != selection_focus_rect_ ||
 191               text_input_type_ != ui::TEXT_INPUT_TYPE_NONE)) {
 192         StartTouchEditing();
 193         UpdateEditingController();
 194       }
 195       // fall through to reset |scroll_in_progress_|.
 196     case ui::ET_SCROLL_FLING_START:
 197       selection_gesture_in_process_ = false;
 198       scroll_in_progress_ = false;
 199       break;
 200     default:
 201       break;
 202   }
 203   return false;
 204 }
 205
 206 void TouchEditableImplAura::GestureEventAck(int gesture_event_type) {
 207   DCHECK(rwhva_);
 208   if (gesture_event_type == blink::WebInputEvent::GestureTap &&
 209       text_input_type_ != ui::TEXT_INPUT_TYPE_NONE &&
 210       textfield_was_focused_on_tap_) {
 211     StartTouchEditing();
 212     UpdateEditingController();
 213   }
 214 }
 215
 216 void TouchEditableImplAura::OnViewDestroyed() {
 217   Cleanup();
 218 }
 219
 220 ////////////////////////////////////////////////////////////////////////////////
 221 // TouchEditableImplAura, ui::TouchEditable implementation:
 222
 223 void TouchEditableImplAura::SelectRect(const gfx::Point& start,
 224                                        const gfx::Point& end) {
 225   RenderWidgetHost* host = rwhva_->GetRenderWidgetHost();
 226   RenderViewHost* rvh = RenderViewHost::From(host);
 227   WebContentsImpl* wc =
 228       static_cast<WebContentsImpl*>(WebContents::FromRenderViewHost(rvh));
 229   wc->SelectRange(start, end);
 230 }
 231
 232 void TouchEditableImplAura::MoveCaretTo(const gfx::Point& point) {
 233   if (!rwhva_)
 234     return;
 235
 236   RenderWidgetHostImpl* host = RenderWidgetHostImpl::From(
 237       rwhva_->GetRenderWidgetHost());
 238   host->MoveCaret(point);
 239 }
 240
 241 void TouchEditableImplAura::GetSelectionEndPoints(gfx::Rect* p1,
 242                                                   gfx::Rect* p2) {
 243   *p1 = selection_anchor_rect_;
 244   *p2 = selection_focus_rect_;
 245 }
 246
 247 gfx::Rect TouchEditableImplAura::GetBounds() {
 248   return rwhva_ ? gfx::Rect(rwhva_->GetNativeView()->bounds().size()) :
 249       gfx::Rect();
 250 }
 251
 252 gfx::NativeView TouchEditableImplAura::GetNativeView() const {
 253   return rwhva_ ? rwhva_->GetNativeView()->GetToplevelWindow() : NULL;
 254 }
 255
 256 void TouchEditableImplAura::ConvertPointToScreen(gfx::Point* point) {
 257   if (!rwhva_)
 258     return;
 259   aura::Window* window = rwhva_->GetNativeView();
 260   aura::client::ScreenPositionClient* screen_position_client =
 261       aura::client::GetScreenPositionClient(window->GetRootWindow());
 262   if (screen_position_client)
 263     screen_position_client->ConvertPointToScreen(window, point);
 264 }
 265
 266 void TouchEditableImplAura::ConvertPointFromScreen(gfx::Point* point) {
 267   if (!rwhva_)
 268     return;
 269   aura::Window* window = rwhva_->GetNativeView();
 270   aura::client::ScreenPositionClient* screen_position_client =
 271       aura::client::GetScreenPositionClient(window->GetRootWindow());
 272   if (screen_position_client)
 273     screen_position_client->ConvertPointFromScreen(window, point);
 274 }
 275
 276 bool TouchEditableImplAura::DrawsHandles() {
 277   return false;
 278 }
 279
 280 void TouchEditableImplAura::OpenContextMenu(const gfx::Point& anchor) {
 281   if (!rwhva_)
 282     return;
 283   gfx::Point point = anchor;
 284   ConvertPointFromScreen(&point);
 285   RenderWidgetHost* host = rwhva_->GetRenderWidgetHost();
 286   host->Send(new ViewMsg_ShowContextMenu(host->GetRoutingID(), point));
 287   EndTouchEditing(false);
 288 }
 289
 290 bool TouchEditableImplAura::IsCommandIdChecked(int command_id) const {
 291   NOTREACHED();
 292   return false;
 293 }
 294
 295 bool TouchEditableImplAura::IsCommandIdEnabled(int command_id) const {
 296   if (!rwhva_)
 297     return false;
 298   bool editable = rwhva_->GetTextInputType() != ui::TEXT_INPUT_TYPE_NONE;
 299   gfx::Range selection_range;
 300   rwhva_->GetSelectionRange(&selection_range);
 301   bool has_selection = !selection_range.is_empty();
 302   switch (command_id) {
 303     case IDS_APP_CUT:
 304       return editable && has_selection;
 305     case IDS_APP_COPY:
 306       return has_selection;
 307     case IDS_APP_PASTE: {
 308       base::string16 result;
 309       ui::Clipboard::GetForCurrentThread()->ReadText(
 310           ui::CLIPBOARD_TYPE_COPY_PASTE, &result);
 311       return editable && !result.empty();
 312     }
 313     case IDS_APP_DELETE:
 314       return editable && has_selection;
 315     case IDS_APP_SELECT_ALL:
 316       return true;
 317     default:
 318       return false;
 319   }
 320 }
 321
 322 bool TouchEditableImplAura::GetAcceleratorForCommandId(
 323     int command_id,
 324     ui::Accelerator* accelerator) {
 325   return false;
 326 }
 327
 328 void TouchEditableImplAura::ExecuteCommand(int command_id, int event_flags) {
 329   RenderWidgetHost* host = rwhva_->GetRenderWidgetHost();
 330   RenderViewHost* rvh = RenderViewHost::From(host);
 331   WebContents* wc = WebContents::FromRenderViewHost(rvh);
 332
 333   switch (command_id) {
 334     case IDS_APP_CUT:
 335       wc->Cut();
 336       break;
 337     case IDS_APP_COPY:
 338       wc->Copy();
 339       break;
 340     case IDS_APP_PASTE:
 341       wc->Paste();
 342       break;
 343     case IDS_APP_DELETE:
 344       wc->Delete();
 345       break;
 346     case IDS_APP_SELECT_ALL:
 347       wc->SelectAll();
 348       break;
 349     default:
 350       NOTREACHED();
 351       break;
 352   }
 353   EndTouchEditing(false);
 354 }
 355
 356 void TouchEditableImplAura::DestroyTouchSelection() {
 357   EndTouchEditing(false);
 358 }
 359
 360 ////////////////////////////////////////////////////////////////////////////////
 361 // TouchEditableImplAura, private:
 362
 363 TouchEditableImplAura::TouchEditableImplAura()
 364     : text_input_type_(ui::TEXT_INPUT_TYPE_NONE),
 365       rwhva_(NULL),
 366       selection_gesture_in_process_(false),
 367       handles_hidden_due_to_scroll_(false),
 368       scroll_in_progress_(false),
 369       overscroll_in_progress_(false),
 370       textfield_was_focused_on_tap_(false) {
 371 }
 372
 373 void TouchEditableImplAura::Cleanup() {
 374   if (rwhva_) {
 375     rwhva_->set_touch_editing_client(NULL);
 376     rwhva_ = NULL;
 377   }
 378   text_input_type_ = ui::TEXT_INPUT_TYPE_NONE;
 379   EndTouchEditing(true);
 380   selection_gesture_in_process_ = false;
 381   handles_hidden_due_to_scroll_ = false;
 382   scroll_in_progress_ = false;
 383   overscroll_in_progress_ = false;
 384 }
 385
 386 }  // namespace content