1 // Copyright (c) 2012 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.
5 #include "chrome/browser/ui/views/tabs/tab_drag_controller.h"
10 #include "base/auto_reset.h"
11 #include "base/callback.h"
12 #include "base/i18n/rtl.h"
13 #include "chrome/browser/chrome_notification_types.h"
14 #include "chrome/browser/profiles/profile.h"
15 #include "chrome/browser/ui/browser_list.h"
16 #include "chrome/browser/ui/browser_window.h"
17 #include "chrome/browser/ui/tabs/tab_strip_model.h"
18 #include "chrome/browser/ui/tabs/tab_strip_model_delegate.h"
19 #include "chrome/browser/ui/views/frame/browser_view.h"
20 #include "chrome/browser/ui/views/tabs/browser_tab_strip_controller.h"
21 #include "chrome/browser/ui/views/tabs/stacked_tab_strip_layout.h"
22 #include "chrome/browser/ui/views/tabs/tab.h"
23 #include "chrome/browser/ui/views/tabs/tab_strip.h"
24 #include "chrome/browser/ui/views/tabs/window_finder.h"
25 #include "content/public/browser/notification_details.h"
26 #include "content/public/browser/notification_service.h"
27 #include "content/public/browser/notification_source.h"
28 #include "content/public/browser/notification_types.h"
29 #include "content/public/browser/user_metrics.h"
30 #include "content/public/browser/web_contents.h"
31 #include "extensions/browser/extension_function_dispatcher.h"
32 #include "ui/events/event_constants.h"
33 #include "ui/events/gestures/gesture_recognizer.h"
34 #include "ui/gfx/geometry/point_conversions.h"
35 #include "ui/gfx/screen.h"
36 #include "ui/views/event_monitor.h"
37 #include "ui/views/focus/view_storage.h"
38 #include "ui/views/widget/root_view.h"
39 #include "ui/views/widget/widget.h"
42 #include "ash/accelerators/accelerator_commands.h"
43 #include "ash/shell.h"
44 #include "ash/wm/maximize_mode/maximize_mode_controller.h"
45 #include "ash/wm/window_state.h"
46 #include "ui/wm/core/coordinate_conversion.h"
50 #include "ui/aura/env.h"
51 #include "ui/aura/window.h"
52 #include "ui/wm/core/window_modality_controller.h"
55 using base::UserMetricsAction;
56 using content::OpenURLParams;
57 using content::WebContents;
59 // If non-null there is a drag underway.
60 static TabDragController* instance_ = NULL;
64 // Delay, in ms, during dragging before we bring a window to front.
65 const int kBringToFrontDelay = 750;
67 // Initial delay before moving tabs when the dragged tab is close to the edge of
69 const int kMoveAttachedInitialDelay = 600;
71 // Delay for moving tabs after the initial delay has passed.
72 const int kMoveAttachedSubsequentDelay = 300;
74 const int kHorizontalMoveThreshold = 16; // Pixels.
76 // Distance from the next/previous stacked before before we consider the tab
77 // close enough to trigger moving.
78 const int kStackedDistance = 36;
81 void SetWindowPositionManaged(gfx::NativeWindow window, bool value) {
82 ash::wm::GetWindowState(window)->set_window_position_managed(value);
85 // Returns true if |tab_strip| browser window is docked.
86 bool IsDockedOrSnapped(const TabStrip* tab_strip) {
88 ash::wm::WindowState* window_state =
89 ash::wm::GetWindowState(tab_strip->GetWidget()->GetNativeWindow());
90 return window_state->IsDocked() || window_state->IsSnapped();
93 void SetWindowPositionManaged(gfx::NativeWindow window, bool value) {
96 bool IsDockedOrSnapped(const TabStrip* tab_strip) {
101 #if defined(USE_AURA)
102 gfx::NativeWindow GetModalTransient(gfx::NativeWindow window) {
103 return wm::GetModalTransient(window);
106 gfx::NativeWindow GetModalTransient(gfx::NativeWindow window) {
112 // Returns true if |bounds| contains the y-coordinate |y|. The y-coordinate
113 // of |bounds| is adjusted by |vertical_adjustment|.
114 bool DoesRectContainVerticalPointExpanded(
115 const gfx::Rect& bounds,
116 int vertical_adjustment,
118 int upper_threshold = bounds.bottom() + vertical_adjustment;
119 int lower_threshold = bounds.y() - vertical_adjustment;
120 return y >= lower_threshold && y <= upper_threshold;
123 // Adds |x_offset| to all the rectangles in |rects|.
124 void OffsetX(int x_offset, std::vector<gfx::Rect>* rects) {
128 for (size_t i = 0; i < rects->size(); ++i)
129 (*rects)[i].set_x((*rects)[i].x() + x_offset);
132 // WidgetObserver implementation that resets the window position managed
134 // We're forced to do this here since BrowserFrameAsh resets the 'window
135 // position managed' property during a show and we need the property set to
136 // false before WorkspaceLayoutManager sees the visibility change.
137 class WindowPositionManagedUpdater : public views::WidgetObserver {
139 void OnWidgetVisibilityChanged(views::Widget* widget, bool visible) override {
140 SetWindowPositionManaged(widget->GetNativeWindow(), false);
144 // EscapeTracker installs an event monitor and runs a callback when it receives
146 class EscapeTracker : public ui::EventHandler {
148 explicit EscapeTracker(const base::Closure& callback)
149 : escape_callback_(callback),
150 event_monitor_(views::EventMonitor::Create(this)) {
155 void OnKeyEvent(ui::KeyEvent* key) override {
156 if (key->type() == ui::ET_KEY_PRESSED &&
157 key->key_code() == ui::VKEY_ESCAPE) {
158 escape_callback_.Run();
162 base::Closure escape_callback_;
163 scoped_ptr<views::EventMonitor> event_monitor_;
165 DISALLOW_COPY_AND_ASSIGN(EscapeTracker);
170 TabDragController::TabDragData::TabDragData()
172 source_model_index(-1),
177 TabDragController::TabDragData::~TabDragData() {
180 ///////////////////////////////////////////////////////////////////////////////
181 // TabDragController, public:
184 const int TabDragController::kTouchVerticalDetachMagnetism = 50;
187 const int TabDragController::kVerticalDetachMagnetism = 15;
189 TabDragController::TabDragController()
190 : event_source_(EVENT_SOURCE_MOUSE),
191 source_tabstrip_(NULL),
192 attached_tabstrip_(NULL),
194 host_desktop_type_(chrome::HOST_DESKTOP_TYPE_NATIVE),
195 can_release_capture_(true),
196 offset_to_width_ratio_(0),
197 old_focused_view_id_(
198 views::ViewStorage::GetInstance()->CreateStorageID()),
199 last_move_screen_loc_(0),
200 started_drag_(false),
202 source_tab_index_(std::numeric_limits<size_t>::max()),
204 detach_behavior_(DETACHABLE),
205 move_behavior_(REORDER),
206 mouse_move_direction_(0),
207 is_dragging_window_(false),
208 is_dragging_new_browser_(false),
209 was_source_maximized_(false),
210 was_source_fullscreen_(false),
211 did_restore_window_(false),
212 end_run_loop_behavior_(END_RUN_LOOP_STOP_DRAGGING),
213 waiting_for_run_loop_to_exit_(false),
214 tab_strip_to_attach_to_after_exit_(NULL),
215 move_loop_widget_(NULL),
219 weak_factory_(this) {
223 TabDragController::~TabDragController() {
224 views::ViewStorage::GetInstance()->RemoveView(old_focused_view_id_);
226 if (instance_ == this)
229 if (move_loop_widget_) {
230 move_loop_widget_->RemoveObserver(this);
231 SetWindowPositionManaged(move_loop_widget_->GetNativeWindow(), true);
234 if (source_tabstrip_)
235 GetModel(source_tabstrip_)->RemoveObserver(this);
237 if (event_source_ == EVENT_SOURCE_TOUCH) {
238 TabStrip* capture_tabstrip = attached_tabstrip_ ?
239 attached_tabstrip_ : source_tabstrip_;
240 capture_tabstrip->GetWidget()->ReleaseCapture();
244 void TabDragController::Init(
245 TabStrip* source_tabstrip,
247 const std::vector<Tab*>& tabs,
248 const gfx::Point& mouse_offset,
249 int source_tab_offset,
250 const ui::ListSelectionModel& initial_selection_model,
251 MoveBehavior move_behavior,
252 EventSource event_source) {
253 DCHECK(!tabs.empty());
254 DCHECK(std::find(tabs.begin(), tabs.end(), source_tab) != tabs.end());
255 source_tabstrip_ = source_tabstrip;
256 was_source_maximized_ = source_tabstrip->GetWidget()->IsMaximized();
257 was_source_fullscreen_ = source_tabstrip->GetWidget()->IsFullscreen();
258 screen_ = gfx::Screen::GetScreenFor(
259 source_tabstrip->GetWidget()->GetNativeView());
260 host_desktop_type_ = chrome::GetHostDesktopTypeForNativeView(
261 source_tabstrip->GetWidget()->GetNativeView());
262 // Do not release capture when transferring capture between widgets on:
264 // Mouse capture is not synchronous on desktop Linux. Chrome makes
265 // transferring capture between widgets without releasing capture appear
266 // synchronous on desktop Linux, so use that.
268 // Releasing capture on Ash cancels gestures so avoid it.
269 #if defined(OS_LINUX)
270 can_release_capture_ = false;
272 can_release_capture_ =
273 (host_desktop_type_ != chrome::HOST_DESKTOP_TYPE_ASH);
275 start_point_in_screen_ = gfx::Point(source_tab_offset, mouse_offset.y());
276 views::View::ConvertPointToScreen(source_tab, &start_point_in_screen_);
277 event_source_ = event_source;
278 mouse_offset_ = mouse_offset;
279 move_behavior_ = move_behavior;
280 last_point_in_screen_ = start_point_in_screen_;
281 last_move_screen_loc_ = start_point_in_screen_.x();
282 initial_tab_positions_ = source_tabstrip->GetTabXCoordinates();
284 GetModel(source_tabstrip_)->AddObserver(this);
286 drag_data_.resize(tabs.size());
287 for (size_t i = 0; i < tabs.size(); ++i)
288 InitTabDragData(tabs[i], &(drag_data_[i]));
290 std::find(tabs.begin(), tabs.end(), source_tab) - tabs.begin();
292 // Listen for Esc key presses.
293 escape_tracker_.reset(
294 new EscapeTracker(base::Bind(&TabDragController::EndDrag,
295 weak_factory_.GetWeakPtr(),
298 if (source_tab->width() > 0) {
299 offset_to_width_ratio_ = static_cast<float>(
300 source_tab->GetMirroredXInView(source_tab_offset)) /
301 static_cast<float>(source_tab->width());
303 InitWindowCreatePoint();
304 initial_selection_model_.Copy(initial_selection_model);
306 // Gestures don't automatically do a capture. We don't allow multiple drags at
307 // the same time, so we explicitly capture.
308 if (event_source == EVENT_SOURCE_TOUCH)
309 source_tabstrip_->GetWidget()->SetCapture(source_tabstrip_);
312 if (ash::Shell::HasInstance() &&
313 ash::Shell::GetInstance()->maximize_mode_controller()->
314 IsMaximizeModeWindowManagerEnabled()) {
315 detach_behavior_ = NOT_DETACHABLE;
321 bool TabDragController::IsAttachedTo(const TabStrip* tab_strip) {
322 return (instance_ && instance_->active() &&
323 instance_->attached_tabstrip() == tab_strip);
327 bool TabDragController::IsActive() {
328 return instance_ && instance_->active();
331 void TabDragController::SetMoveBehavior(MoveBehavior behavior) {
335 move_behavior_ = behavior;
338 void TabDragController::Drag(const gfx::Point& point_in_screen) {
339 TRACE_EVENT1("views", "TabDragController::Drag",
340 "point_in_screen", point_in_screen.ToString());
342 bring_to_front_timer_.Stop();
343 move_stacked_timer_.Stop();
345 if (waiting_for_run_loop_to_exit_)
348 if (!started_drag_) {
349 if (!CanStartDrag(point_in_screen))
350 return; // User hasn't dragged far enough yet.
352 // On windows SaveFocus() may trigger a capture lost, which destroys us.
354 base::WeakPtr<TabDragController> ref(weak_factory_.GetWeakPtr());
359 started_drag_ = true;
360 Attach(source_tabstrip_, gfx::Point());
361 if (static_cast<int>(drag_data_.size()) ==
362 GetModel(source_tabstrip_)->count()) {
363 if (was_source_maximized_ || was_source_fullscreen_) {
364 did_restore_window_ = true;
365 // When all tabs in a maximized browser are dragged the browser gets
366 // restored during the drag and maximized back when the drag ends.
367 views::Widget* widget = GetAttachedBrowserWidget();
368 const int last_tabstrip_width = attached_tabstrip_->tab_area_width();
369 std::vector<gfx::Rect> drag_bounds = CalculateBoundsForDraggedTabs();
370 OffsetX(GetAttachedDragPoint(point_in_screen).x(), &drag_bounds);
371 gfx::Rect new_bounds(CalculateDraggedBrowserBounds(source_tabstrip_,
374 new_bounds.Offset(-widget->GetRestoredBounds().x() +
375 point_in_screen.x() -
376 mouse_offset_.x(), 0);
377 widget->SetVisibilityChangedAnimationsEnabled(false);
379 widget->SetBounds(new_bounds);
380 AdjustBrowserAndTabBoundsForDrag(last_tabstrip_width,
383 widget->SetVisibilityChangedAnimationsEnabled(true);
385 RunMoveLoop(GetWindowOffset(point_in_screen));
390 ContinueDragging(point_in_screen);
393 void TabDragController::EndDrag(EndDragReason reason) {
394 TRACE_EVENT0("views", "TabDragController::EndDrag");
396 // If we're dragging a window ignore capture lost since it'll ultimately
397 // trigger the move loop to end and we'll revert the drag when RunMoveLoop()
399 if (reason == END_DRAG_CAPTURE_LOST && is_dragging_window_)
401 EndDragImpl(reason != END_DRAG_COMPLETE && source_tabstrip_ ?
405 void TabDragController::InitTabDragData(Tab* tab,
406 TabDragData* drag_data) {
407 TRACE_EVENT0("views", "TabDragController::InitTabDragData");
408 drag_data->source_model_index =
409 source_tabstrip_->GetModelIndexOfTab(tab);
410 drag_data->contents = GetModel(source_tabstrip_)->GetWebContentsAt(
411 drag_data->source_model_index);
412 drag_data->pinned = source_tabstrip_->IsTabPinned(tab);
415 content::NOTIFICATION_WEB_CONTENTS_DESTROYED,
416 content::Source<WebContents>(drag_data->contents));
419 ///////////////////////////////////////////////////////////////////////////////
420 // TabDragController, content::NotificationObserver implementation:
422 void TabDragController::Observe(
424 const content::NotificationSource& source,
425 const content::NotificationDetails& details) {
426 DCHECK_EQ(content::NOTIFICATION_WEB_CONTENTS_DESTROYED, type);
427 WebContents* destroyed_web_contents =
428 content::Source<WebContents>(source).ptr();
429 for (size_t i = 0; i < drag_data_.size(); ++i) {
430 if (drag_data_[i].contents == destroyed_web_contents) {
431 // One of the tabs we're dragging has been destroyed. Cancel the drag.
432 drag_data_[i].contents = NULL;
433 EndDragImpl(TAB_DESTROYED);
437 // If we get here it means we got notification for a tab we don't know about.
441 void TabDragController::OnWidgetBoundsChanged(views::Widget* widget,
442 const gfx::Rect& new_bounds) {
443 TRACE_EVENT1("views", "TabDragController::OnWidgetBoundsChanged",
444 "new_bounds", new_bounds.ToString());
446 Drag(GetCursorScreenPoint());
449 void TabDragController::TabStripEmpty() {
450 GetModel(source_tabstrip_)->RemoveObserver(this);
451 // NULL out source_tabstrip_ so that we don't attempt to add back to it (in
452 // the case of a revert).
453 source_tabstrip_ = NULL;
456 ///////////////////////////////////////////////////////////////////////////////
457 // TabDragController, private:
459 void TabDragController::InitWindowCreatePoint() {
460 // window_create_point_ is only used in CompleteDrag() (through
461 // GetWindowCreatePoint() to get the start point of the docked window) when
462 // the attached_tabstrip_ is NULL and all the window's related bound
463 // information are obtained from source_tabstrip_. So, we need to get the
464 // first_tab based on source_tabstrip_, not attached_tabstrip_. Otherwise,
465 // the window_create_point_ is not in the correct coordinate system. Please
466 // refer to http://crbug.com/6223 comment #15 for detailed information.
467 views::View* first_tab = source_tabstrip_->tab_at(0);
468 views::View::ConvertPointToWidget(first_tab, &first_source_tab_point_);
469 window_create_point_ = first_source_tab_point_;
470 window_create_point_.Offset(mouse_offset_.x(), mouse_offset_.y());
473 gfx::Point TabDragController::GetWindowCreatePoint(
474 const gfx::Point& origin) const {
475 // If the cursor is outside the monitor area, move it inside. For example,
476 // dropping a tab onto the task bar on Windows produces this situation.
477 gfx::Rect work_area = screen_->GetDisplayNearestPoint(origin).work_area();
478 gfx::Point create_point(origin);
479 if (!work_area.IsEmpty()) {
480 if (create_point.x() < work_area.x())
481 create_point.set_x(work_area.x());
482 else if (create_point.x() > work_area.right())
483 create_point.set_x(work_area.right());
484 if (create_point.y() < work_area.y())
485 create_point.set_y(work_area.y());
486 else if (create_point.y() > work_area.bottom())
487 create_point.set_y(work_area.bottom());
489 return gfx::Point(create_point.x() - window_create_point_.x(),
490 create_point.y() - window_create_point_.y());
493 void TabDragController::SaveFocus() {
494 DCHECK(source_tabstrip_);
495 views::View* focused_view =
496 source_tabstrip_->GetFocusManager()->GetFocusedView();
498 views::ViewStorage::GetInstance()->StoreView(old_focused_view_id_,
500 source_tabstrip_->GetFocusManager()->SetFocusedView(source_tabstrip_);
501 // WARNING: we may have been deleted.
504 void TabDragController::RestoreFocus() {
505 if (attached_tabstrip_ != source_tabstrip_) {
506 if (is_dragging_new_browser_) {
507 content::WebContents* active_contents = source_dragged_contents();
508 if (active_contents && !active_contents->FocusLocationBarByDefault())
509 active_contents->Focus();
513 views::View* old_focused_view =
514 views::ViewStorage::GetInstance()->RetrieveView(old_focused_view_id_);
515 if (!old_focused_view)
517 old_focused_view->GetFocusManager()->SetFocusedView(old_focused_view);
520 bool TabDragController::CanStartDrag(const gfx::Point& point_in_screen) const {
521 // Determine if the mouse has moved beyond a minimum elasticity distance in
522 // any direction from the starting point.
523 static const int kMinimumDragDistance = 10;
524 int x_offset = abs(point_in_screen.x() - start_point_in_screen_.x());
525 int y_offset = abs(point_in_screen.y() - start_point_in_screen_.y());
526 return sqrt(pow(static_cast<float>(x_offset), 2) +
527 pow(static_cast<float>(y_offset), 2)) > kMinimumDragDistance;
530 void TabDragController::ContinueDragging(const gfx::Point& point_in_screen) {
531 TRACE_EVENT1("views", "TabDragController::ContinueDragging",
532 "point_in_screen", point_in_screen.ToString());
534 DCHECK(attached_tabstrip_);
536 TabStrip* target_tabstrip = detach_behavior_ == DETACHABLE ?
537 GetTargetTabStripForPoint(point_in_screen) : source_tabstrip_;
538 bool tab_strip_changed = (target_tabstrip != attached_tabstrip_);
540 if (attached_tabstrip_) {
541 int move_delta = point_in_screen.x() - last_point_in_screen_.x();
543 mouse_move_direction_ |= kMovedMouseRight;
544 else if (move_delta < 0)
545 mouse_move_direction_ |= kMovedMouseLeft;
547 last_point_in_screen_ = point_in_screen;
549 if (tab_strip_changed) {
550 is_dragging_new_browser_ = false;
551 did_restore_window_ = false;
552 if (DragBrowserToNewTabStrip(target_tabstrip, point_in_screen) ==
553 DRAG_BROWSER_RESULT_STOP) {
557 if (is_dragging_window_) {
558 static_cast<base::Timer*>(&bring_to_front_timer_)->Start(FROM_HERE,
559 base::TimeDelta::FromMilliseconds(kBringToFrontDelay),
560 base::Bind(&TabDragController::BringWindowUnderPointToFront,
561 base::Unretained(this), point_in_screen));
564 if (!is_dragging_window_ && attached_tabstrip_) {
566 DragActiveTabStacked(point_in_screen);
568 MoveAttached(point_in_screen);
569 if (tab_strip_changed) {
570 // Move the corresponding window to the front. We do this after the
571 // move as on windows activate triggers a synchronous paint.
572 attached_tabstrip_->GetWidget()->Activate();
578 TabDragController::DragBrowserResultType
579 TabDragController::DragBrowserToNewTabStrip(
580 TabStrip* target_tabstrip,
581 const gfx::Point& point_in_screen) {
582 TRACE_EVENT1("views", "TabDragController::DragBrowserToNewTabStrip",
583 "point_in_screen", point_in_screen.ToString());
585 if (!target_tabstrip) {
586 DetachIntoNewBrowserAndRunMoveLoop(point_in_screen);
587 return DRAG_BROWSER_RESULT_STOP;
589 if (is_dragging_window_) {
590 // ReleaseCapture() is going to result in calling back to us (because it
591 // results in a move). That'll cause all sorts of problems. Reset the
592 // observer so we don't get notified and process the event.
593 if (host_desktop_type_ == chrome::HOST_DESKTOP_TYPE_ASH) {
594 move_loop_widget_->RemoveObserver(this);
595 move_loop_widget_ = NULL;
597 views::Widget* browser_widget = GetAttachedBrowserWidget();
598 // Need to release the drag controller before starting the move loop as it's
599 // going to trigger capture lost, which cancels drag.
600 attached_tabstrip_->ReleaseDragController();
601 target_tabstrip->OwnDragController(this);
602 // Disable animations so that we don't see a close animation on aero.
603 browser_widget->SetVisibilityChangedAnimationsEnabled(false);
604 if (can_release_capture_)
605 browser_widget->ReleaseCapture();
607 target_tabstrip->GetWidget()->SetCapture(attached_tabstrip_);
609 // The Gesture recognizer does not work well currently when capture changes
610 // while a touch gesture is in progress. So we need to manually transfer
611 // gesture sequence and the GR's touch events queue to the new window. This
612 // should really be done somewhere in capture change code and or inside the
613 // GR. But we currently do not have a consistent way for doing it that would
614 // work in all cases. Hence this hack.
615 ui::GestureRecognizer::Get()->TransferEventsTo(
616 browser_widget->GetNativeView(),
617 target_tabstrip->GetWidget()->GetNativeView());
620 // The window is going away. Since the drag is still on going we don't want
621 // that to effect the position of any windows.
622 SetWindowPositionManaged(browser_widget->GetNativeWindow(), false);
624 #if !defined(OS_LINUX) || defined(OS_CHROMEOS)
625 // EndMoveLoop is going to snap the window back to its original location.
626 // Hide it so users don't see this. Hiding a window in Linux aura causes
627 // it to lose capture so skip it.
628 browser_widget->Hide();
630 browser_widget->EndMoveLoop();
632 // Ideally we would always swap the tabs now, but on non-ash Windows, it
633 // seems that running the move loop implicitly activates the window when
634 // done, leading to all sorts of flicker. So, on non-ash Windows, instead
635 // we process the move after the loop completes. But on chromeos, we can
636 // do tab swapping now to avoid the tab flashing issue
637 // (crbug.com/116329).
638 if (can_release_capture_) {
639 tab_strip_to_attach_to_after_exit_ = target_tabstrip;
641 is_dragging_window_ = false;
642 Detach(DONT_RELEASE_CAPTURE);
643 Attach(target_tabstrip, point_in_screen);
644 // Move the tabs into position.
645 MoveAttached(point_in_screen);
646 attached_tabstrip_->GetWidget()->Activate();
649 waiting_for_run_loop_to_exit_ = true;
650 end_run_loop_behavior_ = END_RUN_LOOP_CONTINUE_DRAGGING;
651 return DRAG_BROWSER_RESULT_STOP;
653 Detach(DONT_RELEASE_CAPTURE);
654 Attach(target_tabstrip, point_in_screen);
655 return DRAG_BROWSER_RESULT_CONTINUE;
658 void TabDragController::DragActiveTabStacked(
659 const gfx::Point& point_in_screen) {
660 if (attached_tabstrip_->tab_count() !=
661 static_cast<int>(initial_tab_positions_.size()))
662 return; // TODO: should cancel drag if this happens.
664 int delta = point_in_screen.x() - start_point_in_screen_.x();
665 attached_tabstrip_->DragActiveTab(initial_tab_positions_, delta);
668 void TabDragController::MoveAttachedToNextStackedIndex(
669 const gfx::Point& point_in_screen) {
670 int index = attached_tabstrip_->touch_layout_->active_index();
671 if (index + 1 >= attached_tabstrip_->tab_count())
674 GetModel(attached_tabstrip_)->MoveSelectedTabsTo(index + 1);
675 StartMoveStackedTimerIfNecessary(point_in_screen,
676 kMoveAttachedSubsequentDelay);
679 void TabDragController::MoveAttachedToPreviousStackedIndex(
680 const gfx::Point& point_in_screen) {
681 int index = attached_tabstrip_->touch_layout_->active_index();
682 if (index <= attached_tabstrip_->GetMiniTabCount())
685 GetModel(attached_tabstrip_)->MoveSelectedTabsTo(index - 1);
686 StartMoveStackedTimerIfNecessary(point_in_screen,
687 kMoveAttachedSubsequentDelay);
690 void TabDragController::MoveAttached(const gfx::Point& point_in_screen) {
691 DCHECK(attached_tabstrip_);
692 DCHECK(!is_dragging_window_);
694 gfx::Point dragged_view_point = GetAttachedDragPoint(point_in_screen);
696 // Determine the horizontal move threshold. This is dependent on the width
697 // of tabs. The smaller the tabs compared to the standard size, the smaller
699 int threshold = kHorizontalMoveThreshold;
700 if (!attached_tabstrip_->touch_layout_.get()) {
701 double unselected, selected;
702 attached_tabstrip_->GetCurrentTabWidths(&unselected, &selected);
703 double ratio = unselected / Tab::GetStandardSize().width();
704 threshold = static_cast<int>(ratio * kHorizontalMoveThreshold);
706 // else case: touch tabs never shrink.
708 std::vector<Tab*> tabs(drag_data_.size());
709 for (size_t i = 0; i < drag_data_.size(); ++i)
710 tabs[i] = drag_data_[i].attached_tab;
712 bool did_layout = false;
713 // Update the model, moving the WebContents from one index to another. Do this
714 // only if we have moved a minimum distance since the last reorder (to prevent
715 // jitter) or if this the first move and the tabs are not consecutive.
716 if ((abs(point_in_screen.x() - last_move_screen_loc_) > threshold ||
717 (initial_move_ && !AreTabsConsecutive()))) {
718 TabStripModel* attached_model = GetModel(attached_tabstrip_);
719 int to_index = GetInsertionIndexForDraggedBounds(
720 GetDraggedViewTabStripBounds(dragged_view_point));
722 // While dragging within a tabstrip the expectation is the insertion index
723 // is based on the left edge of the tabs being dragged. OTOH when dragging
724 // into a new tabstrip (attaching) the expectation is the insertion index is
725 // based on the cursor. This proves problematic as insertion may change the
726 // size of the tabs, resulting in the index calculated before the insert
727 // differing from the index calculated after the insert. To alleviate this
728 // the index is chosen before insertion, and subsequently a new index is
729 // only used once the mouse moves enough such that the index changes based
730 // on the direction the mouse moved relative to |attach_x_| (smaller
731 // x-coordinate should yield a smaller index or larger x-coordinate yields a
733 if (attach_index_ != -1) {
734 gfx::Point tab_strip_point(point_in_screen);
735 views::View::ConvertPointFromScreen(attached_tabstrip_, &tab_strip_point);
737 attached_tabstrip_->GetMirroredXInView(tab_strip_point.x());
738 if (new_x < attach_x_)
739 to_index = std::min(to_index, attach_index_);
741 to_index = std::max(to_index, attach_index_);
742 if (to_index != attach_index_)
743 attach_index_ = -1; // Once a valid move is detected, don't constrain.
748 WebContents* last_contents = drag_data_[drag_data_.size() - 1].contents;
749 int index_of_last_item =
750 attached_model->GetIndexOfWebContents(last_contents);
752 // TabStrip determines if the tabs needs to be animated based on model
753 // position. This means we need to invoke LayoutDraggedTabsAt before
754 // changing the model.
755 attached_tabstrip_->LayoutDraggedTabsAt(
756 tabs, source_tab_drag_data()->attached_tab, dragged_view_point,
760 attached_model->MoveSelectedTabsTo(to_index);
762 // Move may do nothing in certain situations (such as when dragging pinned
763 // tabs). Make sure the tabstrip actually changed before updating
764 // last_move_screen_loc_.
765 if (index_of_last_item !=
766 attached_model->GetIndexOfWebContents(last_contents)) {
767 last_move_screen_loc_ = point_in_screen.x();
773 attached_tabstrip_->LayoutDraggedTabsAt(
774 tabs, source_tab_drag_data()->attached_tab, dragged_view_point,
778 StartMoveStackedTimerIfNecessary(point_in_screen, kMoveAttachedInitialDelay);
780 initial_move_ = false;
783 void TabDragController::StartMoveStackedTimerIfNecessary(
784 const gfx::Point& point_in_screen,
786 DCHECK(attached_tabstrip_);
788 StackedTabStripLayout* touch_layout = attached_tabstrip_->touch_layout_.get();
792 gfx::Point dragged_view_point = GetAttachedDragPoint(point_in_screen);
793 gfx::Rect bounds = GetDraggedViewTabStripBounds(dragged_view_point);
794 int index = touch_layout->active_index();
795 if (ShouldDragToNextStackedTab(bounds, index)) {
796 static_cast<base::Timer*>(&move_stacked_timer_)->Start(
798 base::TimeDelta::FromMilliseconds(delay_ms),
799 base::Bind(&TabDragController::MoveAttachedToNextStackedIndex,
800 base::Unretained(this), point_in_screen));
801 } else if (ShouldDragToPreviousStackedTab(bounds, index)) {
802 static_cast<base::Timer*>(&move_stacked_timer_)->Start(
804 base::TimeDelta::FromMilliseconds(delay_ms),
805 base::Bind(&TabDragController::MoveAttachedToPreviousStackedIndex,
806 base::Unretained(this), point_in_screen));
810 TabDragController::DetachPosition TabDragController::GetDetachPosition(
811 const gfx::Point& point_in_screen) {
812 DCHECK(attached_tabstrip_);
813 gfx::Point attached_point(point_in_screen);
814 views::View::ConvertPointFromScreen(attached_tabstrip_, &attached_point);
815 if (attached_point.x() < 0)
816 return DETACH_BEFORE;
817 if (attached_point.x() >= attached_tabstrip_->width())
819 return DETACH_ABOVE_OR_BELOW;
822 TabStrip* TabDragController::GetTargetTabStripForPoint(
823 const gfx::Point& point_in_screen) {
824 TRACE_EVENT1("views", "TabDragController::GetTargetTabStripForPoint",
825 "point_in_screen", point_in_screen.ToString());
827 if (move_only() && attached_tabstrip_) {
828 // move_only() is intended for touch, in which case we only want to detach
829 // if the touch point moves significantly in the vertical distance.
830 gfx::Rect tabstrip_bounds = GetViewScreenBounds(attached_tabstrip_);
831 if (DoesRectContainVerticalPointExpanded(tabstrip_bounds,
832 kTouchVerticalDetachMagnetism,
833 point_in_screen.y()))
834 return attached_tabstrip_;
836 gfx::NativeWindow local_window =
837 GetLocalProcessWindow(point_in_screen, is_dragging_window_);
838 // Do not allow dragging into a window with a modal dialog, it causes a weird
839 // behavior. See crbug.com/336691
840 if (!GetModalTransient(local_window)) {
841 TabStrip* tab_strip = GetTabStripForWindow(local_window);
842 if (tab_strip && DoesTabStripContain(tab_strip, point_in_screen))
846 return is_dragging_window_ ? attached_tabstrip_ : NULL;
849 TabStrip* TabDragController::GetTabStripForWindow(gfx::NativeWindow window) {
852 BrowserView* browser_view =
853 BrowserView::GetBrowserViewForNativeWindow(window);
854 // We don't allow drops on windows that don't have tabstrips.
856 !browser_view->browser()->SupportsWindowFeature(
857 Browser::FEATURE_TABSTRIP))
860 TabStrip* other_tabstrip = browser_view->tabstrip();
861 TabStrip* tab_strip =
862 attached_tabstrip_ ? attached_tabstrip_ : source_tabstrip_;
865 return other_tabstrip->controller()->IsCompatibleWith(tab_strip) ?
866 other_tabstrip : NULL;
869 bool TabDragController::DoesTabStripContain(
871 const gfx::Point& point_in_screen) const {
872 // Make sure the specified screen point is actually within the bounds of the
873 // specified tabstrip...
874 gfx::Rect tabstrip_bounds = GetViewScreenBounds(tabstrip);
875 return point_in_screen.x() < tabstrip_bounds.right() &&
876 point_in_screen.x() >= tabstrip_bounds.x() &&
877 DoesRectContainVerticalPointExpanded(tabstrip_bounds,
878 kVerticalDetachMagnetism,
879 point_in_screen.y());
882 void TabDragController::Attach(TabStrip* attached_tabstrip,
883 const gfx::Point& point_in_screen) {
884 TRACE_EVENT1("views", "TabDragController::Attach",
885 "point_in_screen", point_in_screen.ToString());
887 DCHECK(!attached_tabstrip_); // We should already have detached by the time
890 attached_tabstrip_ = attached_tabstrip;
892 std::vector<Tab*> tabs =
893 GetTabsMatchingDraggedContents(attached_tabstrip_);
896 // Transitioning from detached to attached to a new tabstrip. Add tabs to
899 selection_model_before_attach_.Copy(attached_tabstrip->GetSelectionModel());
901 // Inserting counts as a move. We don't want the tabs to jitter when the
902 // user moves the tab immediately after attaching it.
903 last_move_screen_loc_ = point_in_screen.x();
905 // Figure out where to insert the tab based on the bounds of the dragged
906 // representation and the ideal bounds of the other Tabs already in the
907 // strip. ("ideal bounds" are stable even if the Tabs' actual bounds are
908 // changing due to animation).
909 gfx::Point tab_strip_point(point_in_screen);
910 views::View::ConvertPointFromScreen(attached_tabstrip_, &tab_strip_point);
911 tab_strip_point.set_x(
912 attached_tabstrip_->GetMirroredXInView(tab_strip_point.x()));
913 tab_strip_point.Offset(0, -mouse_offset_.y());
914 int index = GetInsertionIndexForDraggedBounds(
915 GetDraggedViewTabStripBounds(tab_strip_point));
916 attach_index_ = index;
917 attach_x_ = tab_strip_point.x();
918 base::AutoReset<bool> setter(&is_mutating_, true);
919 for (size_t i = 0; i < drag_data_.size(); ++i) {
920 int add_types = TabStripModel::ADD_NONE;
921 if (attached_tabstrip_->touch_layout_.get()) {
922 // StackedTabStripLayout positions relative to the active tab, if we
923 // don't add the tab as active things bounce around.
924 DCHECK_EQ(1u, drag_data_.size());
925 add_types |= TabStripModel::ADD_ACTIVE;
927 if (drag_data_[i].pinned)
928 add_types |= TabStripModel::ADD_PINNED;
929 GetModel(attached_tabstrip_)->InsertWebContentsAt(
930 index + i, drag_data_[i].contents, add_types);
933 tabs = GetTabsMatchingDraggedContents(attached_tabstrip_);
935 DCHECK_EQ(tabs.size(), drag_data_.size());
936 for (size_t i = 0; i < drag_data_.size(); ++i)
937 drag_data_[i].attached_tab = tabs[i];
939 attached_tabstrip_->StartedDraggingTabs(tabs);
941 ResetSelection(GetModel(attached_tabstrip_));
943 // The size of the dragged tab may have changed. Adjust the x offset so that
944 // ratio of mouse_offset_ to original width is maintained.
945 std::vector<Tab*> tabs_to_source(tabs);
946 tabs_to_source.erase(tabs_to_source.begin() + source_tab_index_ + 1,
947 tabs_to_source.end());
948 int new_x = attached_tabstrip_->GetSizeNeededForTabs(tabs_to_source) -
949 tabs[source_tab_index_]->width() +
950 static_cast<int>(offset_to_width_ratio_ *
951 tabs[source_tab_index_]->width());
952 mouse_offset_.set_x(new_x);
954 // Transfer ownership of us to the new tabstrip as well as making sure the
955 // window has capture. This is important so that if activation changes the
956 // drag isn't prematurely canceled.
957 attached_tabstrip_->GetWidget()->SetCapture(attached_tabstrip_);
958 attached_tabstrip_->OwnDragController(this);
961 void TabDragController::Detach(ReleaseCapture release_capture) {
962 TRACE_EVENT1("views", "TabDragController::Detach",
963 "release_capture", release_capture);
967 // When the user detaches we assume they want to reorder.
968 move_behavior_ = REORDER;
970 // Release ownership of the drag controller and mouse capture. When we
971 // reattach ownership is transfered.
972 attached_tabstrip_->ReleaseDragController();
973 if (release_capture == RELEASE_CAPTURE)
974 attached_tabstrip_->GetWidget()->ReleaseCapture();
976 mouse_move_direction_ = kMovedMouseLeft | kMovedMouseRight;
978 std::vector<gfx::Rect> drag_bounds = CalculateBoundsForDraggedTabs();
979 TabStripModel* attached_model = GetModel(attached_tabstrip_);
980 std::vector<TabRendererData> tab_data;
981 for (size_t i = 0; i < drag_data_.size(); ++i) {
982 tab_data.push_back(drag_data_[i].attached_tab->data());
983 int index = attached_model->GetIndexOfWebContents(drag_data_[i].contents);
984 DCHECK_NE(-1, index);
986 // Hide the tab so that the user doesn't see it animate closed.
987 drag_data_[i].attached_tab->SetVisible(false);
988 drag_data_[i].attached_tab->set_detached();
990 attached_model->DetachWebContentsAt(index);
992 // Detaching may end up deleting the tab, drop references to it.
993 drag_data_[i].attached_tab = NULL;
996 // If we've removed the last Tab from the TabStrip, hide the frame now.
997 if (!attached_model->empty()) {
998 if (!selection_model_before_attach_.empty() &&
999 selection_model_before_attach_.active() >= 0 &&
1000 selection_model_before_attach_.active() < attached_model->count()) {
1001 // Restore the selection.
1002 attached_model->SetSelectionFromModel(selection_model_before_attach_);
1003 } else if (attached_tabstrip_ == source_tabstrip_ &&
1004 !initial_selection_model_.empty()) {
1005 RestoreInitialSelection();
1009 attached_tabstrip_->DraggedTabsDetached();
1010 attached_tabstrip_ = NULL;
1013 void TabDragController::DetachIntoNewBrowserAndRunMoveLoop(
1014 const gfx::Point& point_in_screen) {
1015 if (GetModel(attached_tabstrip_)->count() ==
1016 static_cast<int>(drag_data_.size())) {
1017 // All the tabs in a browser are being dragged but all the tabs weren't
1018 // initially being dragged. For this to happen the user would have to
1019 // start dragging a set of tabs, the other tabs close, then detach.
1020 RunMoveLoop(GetWindowOffset(point_in_screen));
1024 const int last_tabstrip_width = attached_tabstrip_->tab_area_width();
1025 std::vector<gfx::Rect> drag_bounds = CalculateBoundsForDraggedTabs();
1026 OffsetX(GetAttachedDragPoint(point_in_screen).x(), &drag_bounds);
1028 gfx::Vector2d drag_offset;
1029 Browser* browser = CreateBrowserForDrag(
1030 attached_tabstrip_, point_in_screen, &drag_offset, &drag_bounds);
1032 gfx::NativeView attached_native_view =
1033 attached_tabstrip_->GetWidget()->GetNativeView();
1035 Detach(can_release_capture_ ? RELEASE_CAPTURE : DONT_RELEASE_CAPTURE);
1036 BrowserView* dragged_browser_view =
1037 BrowserView::GetBrowserViewForBrowser(browser);
1038 views::Widget* dragged_widget = dragged_browser_view->GetWidget();
1040 // The Gesture recognizer does not work well currently when capture changes
1041 // while a touch gesture is in progress. So we need to manually transfer
1042 // gesture sequence and the GR's touch events queue to the new window. This
1043 // should really be done somewhere in capture change code and or inside the
1044 // GR. But we currently do not have a consistent way for doing it that would
1045 // work in all cases. Hence this hack.
1046 ui::GestureRecognizer::Get()->TransferEventsTo(
1047 attached_native_view,
1048 dragged_widget->GetNativeView());
1050 dragged_widget->SetVisibilityChangedAnimationsEnabled(false);
1051 Attach(dragged_browser_view->tabstrip(), gfx::Point());
1052 AdjustBrowserAndTabBoundsForDrag(last_tabstrip_width,
1055 WindowPositionManagedUpdater updater;
1056 dragged_widget->AddObserver(&updater);
1057 browser->window()->Show();
1058 dragged_widget->RemoveObserver(&updater);
1059 dragged_widget->SetVisibilityChangedAnimationsEnabled(true);
1060 // Activate may trigger a focus loss, destroying us.
1062 base::WeakPtr<TabDragController> ref(weak_factory_.GetWeakPtr());
1063 browser->window()->Activate();
1067 RunMoveLoop(drag_offset);
1070 void TabDragController::RunMoveLoop(const gfx::Vector2d& drag_offset) {
1071 // If the user drags the whole window we'll assume they are going to attach to
1072 // another window and therefore want to reorder.
1073 move_behavior_ = REORDER;
1075 move_loop_widget_ = GetAttachedBrowserWidget();
1076 DCHECK(move_loop_widget_);
1077 move_loop_widget_->AddObserver(this);
1078 is_dragging_window_ = true;
1079 base::WeakPtr<TabDragController> ref(weak_factory_.GetWeakPtr());
1080 if (can_release_capture_) {
1081 // Running the move loop releases mouse capture, which triggers destroying
1082 // the drag loop. Release mouse capture now while the DragController is not
1083 // owned by the TabStrip.
1084 attached_tabstrip_->ReleaseDragController();
1085 attached_tabstrip_->GetWidget()->ReleaseCapture();
1086 attached_tabstrip_->OwnDragController(this);
1088 const views::Widget::MoveLoopSource move_loop_source =
1089 event_source_ == EVENT_SOURCE_MOUSE ?
1090 views::Widget::MOVE_LOOP_SOURCE_MOUSE :
1091 views::Widget::MOVE_LOOP_SOURCE_TOUCH;
1092 const views::Widget::MoveLoopEscapeBehavior escape_behavior =
1093 is_dragging_new_browser_ ?
1094 views::Widget::MOVE_LOOP_ESCAPE_BEHAVIOR_HIDE :
1095 views::Widget::MOVE_LOOP_ESCAPE_BEHAVIOR_DONT_HIDE;
1096 views::Widget::MoveLoopResult result =
1097 move_loop_widget_->RunMoveLoop(
1098 drag_offset, move_loop_source, escape_behavior);
1099 content::NotificationService::current()->Notify(
1100 chrome::NOTIFICATION_TAB_DRAG_LOOP_DONE,
1101 content::NotificationService::AllBrowserContextsAndSources(),
1102 content::NotificationService::NoDetails());
1106 if (move_loop_widget_) {
1107 move_loop_widget_->RemoveObserver(this);
1108 move_loop_widget_ = NULL;
1110 is_dragging_window_ = false;
1111 waiting_for_run_loop_to_exit_ = false;
1112 if (end_run_loop_behavior_ == END_RUN_LOOP_CONTINUE_DRAGGING) {
1113 end_run_loop_behavior_ = END_RUN_LOOP_STOP_DRAGGING;
1114 if (tab_strip_to_attach_to_after_exit_) {
1115 gfx::Point point_in_screen(GetCursorScreenPoint());
1116 Detach(DONT_RELEASE_CAPTURE);
1117 Attach(tab_strip_to_attach_to_after_exit_, point_in_screen);
1118 // Move the tabs into position.
1119 MoveAttached(point_in_screen);
1120 attached_tabstrip_->GetWidget()->Activate();
1121 // Activate may trigger a focus loss, destroying us.
1124 tab_strip_to_attach_to_after_exit_ = NULL;
1126 DCHECK(attached_tabstrip_);
1127 attached_tabstrip_->GetWidget()->SetCapture(attached_tabstrip_);
1128 } else if (active_) {
1129 EndDrag(result == views::Widget::MOVE_LOOP_CANCELED ?
1130 END_DRAG_CANCEL : END_DRAG_COMPLETE);
1134 int TabDragController::GetInsertionIndexFrom(const gfx::Rect& dragged_bounds,
1136 const int last_tab = attached_tabstrip_->tab_count() - 1;
1137 // Make the actual "drag insertion point" be just after the leading edge of
1138 // the first dragged tab. This is closer to where the user thinks of the tab
1139 // as "starting" than just dragged_bounds.x(), especially with narrow tabs.
1140 const int dragged_x = dragged_bounds.x() + Tab::leading_width_for_drag();
1141 if (start < 0 || start > last_tab ||
1142 dragged_x < attached_tabstrip_->ideal_bounds(start).x())
1145 for (int i = start; i <= last_tab; ++i) {
1146 const gfx::Rect& ideal_bounds = attached_tabstrip_->ideal_bounds(i);
1147 if (dragged_x < (ideal_bounds.x() + (ideal_bounds.width() / 2)))
1151 return (dragged_x < attached_tabstrip_->ideal_bounds(last_tab).right()) ?
1152 (last_tab + 1) : -1;
1155 int TabDragController::GetInsertionIndexFromReversed(
1156 const gfx::Rect& dragged_bounds,
1158 // Make the actual "drag insertion point" be just after the leading edge of
1159 // the first dragged tab. This is closer to where the user thinks of the tab
1160 // as "starting" than just dragged_bounds.x(), especially with narrow tabs.
1161 const int dragged_x = dragged_bounds.x() + Tab::leading_width_for_drag();
1162 if (start < 0 || start >= attached_tabstrip_->tab_count() ||
1163 dragged_x >= attached_tabstrip_->ideal_bounds(start).right())
1166 for (int i = start; i >= 0; --i) {
1167 const gfx::Rect& ideal_bounds = attached_tabstrip_->ideal_bounds(i);
1168 if (dragged_x >= (ideal_bounds.x() + (ideal_bounds.width() / 2)))
1172 return (dragged_x >= attached_tabstrip_->ideal_bounds(0).x()) ? 0 : -1;
1175 int TabDragController::GetInsertionIndexForDraggedBounds(
1176 const gfx::Rect& dragged_bounds) const {
1177 // If the strip has no tabs, the only position to insert at is 0.
1178 const int tab_count = attached_tabstrip_->tab_count();
1183 if (attached_tabstrip_->touch_layout_.get()) {
1184 index = GetInsertionIndexForDraggedBoundsStacked(dragged_bounds);
1186 // Only move the tab to the left/right if the user actually moved the
1187 // mouse that way. This is necessary as tabs with stacked tabs
1188 // before/after them have multiple drag positions.
1189 int active_index = attached_tabstrip_->touch_layout_->active_index();
1190 if ((index < active_index &&
1191 (mouse_move_direction_ & kMovedMouseLeft) == 0) ||
1192 (index > active_index &&
1193 (mouse_move_direction_ & kMovedMouseRight) == 0)) {
1194 index = active_index;
1198 index = GetInsertionIndexFrom(dragged_bounds, 0);
1201 const int last_tab_right =
1202 attached_tabstrip_->ideal_bounds(tab_count - 1).right();
1203 index = (dragged_bounds.right() > last_tab_right) ? tab_count : 0;
1206 const Tab* last_visible_tab = attached_tabstrip_->GetLastVisibleTab();
1207 int last_insertion_point = last_visible_tab ?
1208 (attached_tabstrip_->GetModelIndexOfTab(last_visible_tab) + 1) : 0;
1209 if (drag_data_[0].attached_tab) {
1210 // We're not in the process of attaching, so clamp the insertion point to
1211 // keep it within the visible region.
1212 last_insertion_point = std::max(
1213 0, last_insertion_point - static_cast<int>(drag_data_.size()));
1216 // Ensure the first dragged tab always stays in the visible index range.
1217 return std::min(index, last_insertion_point);
1220 bool TabDragController::ShouldDragToNextStackedTab(
1221 const gfx::Rect& dragged_bounds,
1223 if (index + 1 >= attached_tabstrip_->tab_count() ||
1224 !attached_tabstrip_->touch_layout_->IsStacked(index + 1) ||
1225 (mouse_move_direction_ & kMovedMouseRight) == 0)
1228 int active_x = attached_tabstrip_->ideal_bounds(index).x();
1229 int next_x = attached_tabstrip_->ideal_bounds(index + 1).x();
1230 int mid_x = std::min(next_x - kStackedDistance,
1231 active_x + (next_x - active_x) / 4);
1232 // TODO(pkasting): Should this add Tab::leading_width_for_drag() as
1233 // GetInsertionIndexFrom() does?
1234 return dragged_bounds.x() >= mid_x;
1237 bool TabDragController::ShouldDragToPreviousStackedTab(
1238 const gfx::Rect& dragged_bounds,
1240 if (index - 1 < attached_tabstrip_->GetMiniTabCount() ||
1241 !attached_tabstrip_->touch_layout_->IsStacked(index - 1) ||
1242 (mouse_move_direction_ & kMovedMouseLeft) == 0)
1245 int active_x = attached_tabstrip_->ideal_bounds(index).x();
1246 int previous_x = attached_tabstrip_->ideal_bounds(index - 1).x();
1247 int mid_x = std::max(previous_x + kStackedDistance,
1248 active_x - (active_x - previous_x) / 4);
1249 // TODO(pkasting): Should this add Tab::leading_width_for_drag() as
1250 // GetInsertionIndexFrom() does?
1251 return dragged_bounds.x() <= mid_x;
1254 int TabDragController::GetInsertionIndexForDraggedBoundsStacked(
1255 const gfx::Rect& dragged_bounds) const {
1256 StackedTabStripLayout* touch_layout = attached_tabstrip_->touch_layout_.get();
1257 int active_index = touch_layout->active_index();
1258 // Search from the active index to the front of the tabstrip. Do this as tabs
1259 // overlap each other from the active index.
1260 int index = GetInsertionIndexFromReversed(dragged_bounds, active_index);
1261 if (index != active_index)
1264 return GetInsertionIndexFrom(dragged_bounds, active_index + 1);
1266 // The position to drag to corresponds to the active tab. If the next/previous
1267 // tab is stacked, then shorten the distance used to determine insertion
1268 // bounds. We do this as GetInsertionIndexFrom() uses the bounds of the
1269 // tabs. When tabs are stacked the next/previous tab is on top of the tab.
1270 if (active_index + 1 < attached_tabstrip_->tab_count() &&
1271 touch_layout->IsStacked(active_index + 1)) {
1272 index = GetInsertionIndexFrom(dragged_bounds, active_index + 1);
1273 if (index == -1 && ShouldDragToNextStackedTab(dragged_bounds, active_index))
1274 index = active_index + 1;
1275 else if (index == -1)
1276 index = active_index;
1277 } else if (ShouldDragToPreviousStackedTab(dragged_bounds, active_index)) {
1278 index = active_index - 1;
1283 gfx::Rect TabDragController::GetDraggedViewTabStripBounds(
1284 const gfx::Point& tab_strip_point) {
1285 // attached_tab is NULL when inserting into a new tabstrip.
1286 if (source_tab_drag_data()->attached_tab) {
1287 return gfx::Rect(tab_strip_point.x(), tab_strip_point.y(),
1288 source_tab_drag_data()->attached_tab->width(),
1289 source_tab_drag_data()->attached_tab->height());
1292 double sel_width, unselected_width;
1293 attached_tabstrip_->GetCurrentTabWidths(&sel_width, &unselected_width);
1294 return gfx::Rect(tab_strip_point.x(), tab_strip_point.y(),
1295 static_cast<int>(sel_width),
1296 Tab::GetStandardSize().height());
1299 gfx::Point TabDragController::GetAttachedDragPoint(
1300 const gfx::Point& point_in_screen) {
1301 DCHECK(attached_tabstrip_); // The tab must be attached.
1303 gfx::Point tab_loc(point_in_screen);
1304 views::View::ConvertPointFromScreen(attached_tabstrip_, &tab_loc);
1306 attached_tabstrip_->GetMirroredXInView(tab_loc.x()) - mouse_offset_.x();
1308 // TODO: consider caching this.
1309 std::vector<Tab*> attached_tabs;
1310 for (size_t i = 0; i < drag_data_.size(); ++i)
1311 attached_tabs.push_back(drag_data_[i].attached_tab);
1312 const int size = attached_tabstrip_->GetSizeNeededForTabs(attached_tabs);
1313 const int max_x = attached_tabstrip_->width() - size;
1314 return gfx::Point(std::min(std::max(x, 0), max_x), 0);
1317 std::vector<Tab*> TabDragController::GetTabsMatchingDraggedContents(
1318 TabStrip* tabstrip) {
1319 TabStripModel* model = GetModel(attached_tabstrip_);
1320 std::vector<Tab*> tabs;
1321 for (size_t i = 0; i < drag_data_.size(); ++i) {
1322 int model_index = model->GetIndexOfWebContents(drag_data_[i].contents);
1323 if (model_index == TabStripModel::kNoTab)
1324 return std::vector<Tab*>();
1325 tabs.push_back(tabstrip->tab_at(model_index));
1330 std::vector<gfx::Rect> TabDragController::CalculateBoundsForDraggedTabs() {
1331 std::vector<gfx::Rect> drag_bounds;
1332 std::vector<Tab*> attached_tabs;
1333 for (size_t i = 0; i < drag_data_.size(); ++i)
1334 attached_tabs.push_back(drag_data_[i].attached_tab);
1335 attached_tabstrip_->CalculateBoundsForDraggedTabs(attached_tabs,
1340 void TabDragController::EndDragImpl(EndDragType type) {
1344 bring_to_front_timer_.Stop();
1345 move_stacked_timer_.Stop();
1347 if (is_dragging_window_) {
1348 waiting_for_run_loop_to_exit_ = true;
1350 if (type == NORMAL || (type == TAB_DESTROYED && drag_data_.size() > 1)) {
1351 SetWindowPositionManaged(GetAttachedBrowserWidget()->GetNativeWindow(),
1355 // End the nested drag loop.
1356 GetAttachedBrowserWidget()->EndMoveLoop();
1359 if (type != TAB_DESTROYED) {
1360 // We only finish up the drag if we were actually dragging. If start_drag_
1361 // is false, the user just clicked and released and didn't move the mouse
1362 // enough to trigger a drag.
1363 if (started_drag_) {
1365 if (type == CANCELED)
1370 } else if (drag_data_.size() > 1) {
1371 initial_selection_model_.Clear();
1374 } // else case the only tab we were dragging was deleted. Nothing to do.
1376 // Clear out drag data so we don't attempt to do anything with it.
1379 TabStrip* owning_tabstrip = attached_tabstrip_ ?
1380 attached_tabstrip_ : source_tabstrip_;
1381 owning_tabstrip->DestroyDragController();
1384 void TabDragController::RevertDrag() {
1385 std::vector<Tab*> tabs;
1386 for (size_t i = 0; i < drag_data_.size(); ++i) {
1387 if (drag_data_[i].contents) {
1388 // Contents is NULL if a tab was destroyed while the drag was under way.
1389 tabs.push_back(drag_data_[i].attached_tab);
1394 if (attached_tabstrip_) {
1395 if (did_restore_window_)
1396 MaximizeAttachedWindow();
1397 if (attached_tabstrip_ == source_tabstrip_) {
1398 source_tabstrip_->StoppedDraggingTabs(
1399 tabs, initial_tab_positions_, move_behavior_ == MOVE_VISIBILE_TABS,
1402 attached_tabstrip_->DraggedTabsDetached();
1406 if (initial_selection_model_.empty())
1407 ResetSelection(GetModel(source_tabstrip_));
1409 GetModel(source_tabstrip_)->SetSelectionFromModel(initial_selection_model_);
1411 if (source_tabstrip_)
1412 source_tabstrip_->GetWidget()->Activate();
1415 void TabDragController::ResetSelection(TabStripModel* model) {
1417 ui::ListSelectionModel selection_model;
1418 bool has_one_valid_tab = false;
1419 for (size_t i = 0; i < drag_data_.size(); ++i) {
1420 // |contents| is NULL if a tab was deleted out from under us.
1421 if (drag_data_[i].contents) {
1422 int index = model->GetIndexOfWebContents(drag_data_[i].contents);
1423 DCHECK_NE(-1, index);
1424 selection_model.AddIndexToSelection(index);
1425 if (!has_one_valid_tab || i == source_tab_index_) {
1426 // Reset the active/lead to the first tab. If the source tab is still
1427 // valid we'll reset these again later on.
1428 selection_model.set_active(index);
1429 selection_model.set_anchor(index);
1430 has_one_valid_tab = true;
1434 if (!has_one_valid_tab)
1437 model->SetSelectionFromModel(selection_model);
1440 void TabDragController::RestoreInitialSelection() {
1441 // First time detaching from the source tabstrip. Reset selection model to
1442 // initial_selection_model_. Before resetting though we have to remove all
1443 // the tabs from initial_selection_model_ as it was created with the tabs
1445 ui::ListSelectionModel selection_model;
1446 selection_model.Copy(initial_selection_model_);
1447 for (DragData::const_reverse_iterator i(drag_data_.rbegin());
1448 i != drag_data_.rend(); ++i) {
1449 selection_model.DecrementFrom(i->source_model_index);
1451 // We may have cleared out the selection model. Only reset it if it
1452 // contains something.
1453 if (selection_model.empty())
1456 // The anchor/active may have been among the tabs that were dragged out. Force
1457 // the anchor/active to be valid.
1458 if (selection_model.anchor() == ui::ListSelectionModel::kUnselectedIndex)
1459 selection_model.set_anchor(selection_model.selected_indices()[0]);
1460 if (selection_model.active() == ui::ListSelectionModel::kUnselectedIndex)
1461 selection_model.set_active(selection_model.selected_indices()[0]);
1462 GetModel(source_tabstrip_)->SetSelectionFromModel(selection_model);
1465 void TabDragController::RevertDragAt(size_t drag_index) {
1466 DCHECK(started_drag_);
1467 DCHECK(source_tabstrip_);
1469 base::AutoReset<bool> setter(&is_mutating_, true);
1470 TabDragData* data = &(drag_data_[drag_index]);
1471 if (attached_tabstrip_) {
1473 GetModel(attached_tabstrip_)->GetIndexOfWebContents(data->contents);
1474 if (attached_tabstrip_ != source_tabstrip_) {
1475 // The Tab was inserted into another TabStrip. We need to put it back
1476 // into the original one.
1477 GetModel(attached_tabstrip_)->DetachWebContentsAt(index);
1478 // TODO(beng): (Cleanup) seems like we should use Attach() for this
1480 GetModel(source_tabstrip_)->InsertWebContentsAt(
1481 data->source_model_index, data->contents,
1482 (data->pinned ? TabStripModel::ADD_PINNED : 0));
1484 // The Tab was moved within the TabStrip where the drag was initiated.
1485 // Move it back to the starting location.
1486 GetModel(source_tabstrip_)->MoveWebContentsAt(
1487 index, data->source_model_index, false);
1490 // The Tab was detached from the TabStrip where the drag began, and has not
1491 // been attached to any other TabStrip. We need to put it back into the
1493 GetModel(source_tabstrip_)->InsertWebContentsAt(
1494 data->source_model_index, data->contents,
1495 (data->pinned ? TabStripModel::ADD_PINNED : 0));
1499 void TabDragController::CompleteDrag() {
1500 DCHECK(started_drag_);
1502 if (attached_tabstrip_) {
1503 if (is_dragging_new_browser_ || did_restore_window_) {
1504 if (IsDockedOrSnapped(attached_tabstrip_)) {
1505 was_source_maximized_ = false;
1506 was_source_fullscreen_ = false;
1509 // If source window was maximized - maximize the new window as well.
1510 if (was_source_maximized_ || was_source_fullscreen_)
1511 MaximizeAttachedWindow();
1513 attached_tabstrip_->StoppedDraggingTabs(
1514 GetTabsMatchingDraggedContents(attached_tabstrip_),
1515 initial_tab_positions_,
1516 move_behavior_ == MOVE_VISIBILE_TABS,
1519 // Compel the model to construct a new window for the detached
1521 views::Widget* widget = source_tabstrip_->GetWidget();
1522 gfx::Rect window_bounds(widget->GetRestoredBounds());
1523 window_bounds.set_origin(GetWindowCreatePoint(last_point_in_screen_));
1525 base::AutoReset<bool> setter(&is_mutating_, true);
1527 std::vector<TabStripModelDelegate::NewStripContents> contentses;
1528 for (size_t i = 0; i < drag_data_.size(); ++i) {
1529 TabStripModelDelegate::NewStripContents item;
1530 item.web_contents = drag_data_[i].contents;
1531 item.add_types = drag_data_[i].pinned ? TabStripModel::ADD_PINNED
1532 : TabStripModel::ADD_NONE;
1533 contentses.push_back(item);
1536 Browser* new_browser =
1537 GetModel(source_tabstrip_)->delegate()->CreateNewStripWithContents(
1538 contentses, window_bounds, widget->IsMaximized());
1539 ResetSelection(new_browser->tab_strip_model());
1540 new_browser->window()->Show();
1544 void TabDragController::MaximizeAttachedWindow() {
1545 GetAttachedBrowserWidget()->Maximize();
1546 #if defined(USE_ASH)
1547 if (was_source_fullscreen_ &&
1548 host_desktop_type_ == chrome::HOST_DESKTOP_TYPE_ASH) {
1549 // In fullscreen mode it is only possible to get here if the source
1550 // was in "immersive fullscreen" mode, so toggle it back on.
1551 ash::accelerators::ToggleFullscreen();
1556 gfx::Rect TabDragController::GetViewScreenBounds(
1557 views::View* view) const {
1558 gfx::Point view_topleft;
1559 views::View::ConvertPointToScreen(view, &view_topleft);
1560 gfx::Rect view_screen_bounds = view->GetLocalBounds();
1561 view_screen_bounds.Offset(view_topleft.x(), view_topleft.y());
1562 return view_screen_bounds;
1565 void TabDragController::BringWindowUnderPointToFront(
1566 const gfx::Point& point_in_screen) {
1567 gfx::NativeWindow window = GetLocalProcessWindow(point_in_screen, true);
1569 // Only bring browser windows to front - only windows with a TabStrip can
1570 // be tab drag targets.
1571 if (!GetTabStripForWindow(window))
1575 views::Widget* widget_window = views::Widget::GetWidgetForNativeWindow(
1580 #if defined(USE_ASH)
1581 if (host_desktop_type_ == chrome::HOST_DESKTOP_TYPE_ASH) {
1582 // TODO(varkha): The code below ensures that the phantom drag widget
1583 // is shown on top of browser windows. The code should be moved to ash/
1584 // and the phantom should be able to assert its top-most state on its own.
1585 // One strategy would be for DragWindowController to
1586 // be able to observe stacking changes to the phantom drag widget's
1587 // siblings in order to keep it on top. One way is to implement a
1588 // notification that is sent to a window parent's observers when a
1589 // stacking order is changed among the children of that same parent.
1590 // Note that OnWindowStackingChanged is sent only to the child that is the
1591 // argument of one of the Window::StackChildX calls and not to all its
1592 // siblings affected by the stacking change.
1593 aura::Window* browser_window = widget_window->GetNativeView();
1594 // Find a topmost non-popup window and stack the recipient browser above
1595 // it in order to avoid stacking the browser window on top of the phantom
1596 // drag widget created by DragWindowController in a second display.
1597 for (aura::Window::Windows::const_reverse_iterator it =
1598 browser_window->parent()->children().rbegin();
1599 it != browser_window->parent()->children().rend(); ++it) {
1600 // If the iteration reached the recipient browser window then it is
1601 // already topmost and it is safe to return with no stacking change.
1602 if (*it == browser_window)
1604 if ((*it)->type() != ui::wm::WINDOW_TYPE_POPUP) {
1605 widget_window->StackAbove(*it);
1610 widget_window->StackAtTop();
1613 widget_window->StackAtTop();
1616 // The previous call made the window appear on top of the dragged window,
1617 // move the dragged window to the front.
1618 if (is_dragging_window_)
1619 attached_tabstrip_->GetWidget()->StackAtTop();
1623 TabStripModel* TabDragController::GetModel(
1624 TabStrip* tabstrip) const {
1625 return static_cast<BrowserTabStripController*>(tabstrip->controller())->
1629 views::Widget* TabDragController::GetAttachedBrowserWidget() {
1630 return attached_tabstrip_->GetWidget();
1633 bool TabDragController::AreTabsConsecutive() {
1634 for (size_t i = 1; i < drag_data_.size(); ++i) {
1635 if (drag_data_[i - 1].source_model_index + 1 !=
1636 drag_data_[i].source_model_index) {
1643 gfx::Rect TabDragController::CalculateDraggedBrowserBounds(
1645 const gfx::Point& point_in_screen,
1646 std::vector<gfx::Rect>* drag_bounds) {
1647 gfx::Point center(0, source->height() / 2);
1648 views::View::ConvertPointToWidget(source, ¢er);
1649 gfx::Rect new_bounds(source->GetWidget()->GetRestoredBounds());
1650 if (source->GetWidget()->IsMaximized()) {
1651 // If the restore bounds is really small, we don't want to honor it
1652 // (dragging a really small window looks wrong), instead make sure the new
1653 // window is at least 50% the size of the old.
1654 const gfx::Size max_size(
1655 source->GetWidget()->GetWindowBoundsInScreen().size());
1656 new_bounds.set_width(
1657 std::max(max_size.width() / 2, new_bounds.width()));
1658 new_bounds.set_height(
1659 std::max(max_size.height() / 2, new_bounds.height()));
1661 new_bounds.set_y(point_in_screen.y() - center.y());
1662 switch (GetDetachPosition(point_in_screen)) {
1664 new_bounds.set_x(point_in_screen.x() - center.x());
1665 new_bounds.Offset(-mouse_offset_.x(), 0);
1667 case DETACH_AFTER: {
1668 gfx::Point right_edge(source->width(), 0);
1669 views::View::ConvertPointToWidget(source, &right_edge);
1670 new_bounds.set_x(point_in_screen.x() - right_edge.x());
1671 new_bounds.Offset(drag_bounds->back().right() - mouse_offset_.x(), 0);
1672 OffsetX(-(*drag_bounds)[0].x(), drag_bounds);
1676 break; // Nothing to do for DETACH_ABOVE_OR_BELOW.
1679 // To account for the extra vertical on restored windows that is absent on
1680 // maximized windows, add an additional vertical offset extracted from the tab
1682 if (source->GetWidget()->IsMaximized())
1683 new_bounds.Offset(0, -source->kNewTabButtonVerticalOffset);
1687 void TabDragController::AdjustBrowserAndTabBoundsForDrag(
1688 int last_tabstrip_width,
1689 const gfx::Point& point_in_screen,
1690 std::vector<gfx::Rect>* drag_bounds) {
1691 attached_tabstrip_->InvalidateLayout();
1692 attached_tabstrip_->DoLayout();
1693 const int dragged_tabstrip_width = attached_tabstrip_->tab_area_width();
1695 // If the new tabstrip is smaller than the old resize the tabs.
1696 if (dragged_tabstrip_width < last_tabstrip_width) {
1697 const float leading_ratio =
1698 drag_bounds->front().x() / static_cast<float>(last_tabstrip_width);
1699 *drag_bounds = CalculateBoundsForDraggedTabs();
1701 if (drag_bounds->back().right() < dragged_tabstrip_width) {
1703 std::min(static_cast<int>(leading_ratio * dragged_tabstrip_width),
1704 dragged_tabstrip_width -
1705 (drag_bounds->back().right() -
1706 drag_bounds->front().x()));
1707 OffsetX(delta_x, drag_bounds);
1710 // Reposition the restored window such that the tab that was dragged remains
1711 // under the mouse cursor.
1713 static_cast<int>((*drag_bounds)[source_tab_index_].width() *
1714 offset_to_width_ratio_) +
1715 (*drag_bounds)[source_tab_index_].x(), 0);
1716 views::View::ConvertPointToWidget(attached_tabstrip_, &offset);
1717 gfx::Rect bounds = GetAttachedBrowserWidget()->GetWindowBoundsInScreen();
1718 bounds.set_x(point_in_screen.x() - offset.x());
1719 GetAttachedBrowserWidget()->SetBounds(bounds);
1721 attached_tabstrip_->SetTabBoundsForDrag(*drag_bounds);
1724 Browser* TabDragController::CreateBrowserForDrag(
1726 const gfx::Point& point_in_screen,
1727 gfx::Vector2d* drag_offset,
1728 std::vector<gfx::Rect>* drag_bounds) {
1729 gfx::Rect new_bounds(CalculateDraggedBrowserBounds(source,
1732 *drag_offset = point_in_screen - new_bounds.origin();
1735 Profile::FromBrowserContext(drag_data_[0].contents->GetBrowserContext());
1736 Browser::CreateParams create_params(Browser::TYPE_TABBED,
1738 host_desktop_type_);
1739 create_params.initial_bounds = new_bounds;
1740 Browser* browser = new Browser(create_params);
1741 is_dragging_new_browser_ = true;
1742 SetWindowPositionManaged(browser->window()->GetNativeWindow(), false);
1743 // If the window is created maximized then the bounds we supplied are ignored.
1744 // We need to reset them again so they are honored.
1745 browser->window()->SetBounds(new_bounds);
1750 gfx::Point TabDragController::GetCursorScreenPoint() {
1751 #if defined(USE_ASH)
1752 if (host_desktop_type_ == chrome::HOST_DESKTOP_TYPE_ASH &&
1753 event_source_ == EVENT_SOURCE_TOUCH &&
1754 aura::Env::GetInstance()->is_touch_down()) {
1755 views::Widget* widget = GetAttachedBrowserWidget();
1757 aura::Window* widget_window = widget->GetNativeWindow();
1758 DCHECK(widget_window->GetRootWindow());
1759 gfx::PointF touch_point_f;
1760 bool got_touch_point = ui::GestureRecognizer::Get()->
1761 GetLastTouchPointForTarget(widget_window, &touch_point_f);
1762 // TODO(tdresser): Switch to using gfx::PointF. See crbug.com/337824.
1763 gfx::Point touch_point = gfx::ToFlooredPoint(touch_point_f);
1764 DCHECK(got_touch_point);
1765 wm::ConvertPointToScreen(widget_window->GetRootWindow(), &touch_point);
1770 return screen_->GetCursorScreenPoint();
1773 gfx::Vector2d TabDragController::GetWindowOffset(
1774 const gfx::Point& point_in_screen) {
1775 TabStrip* owning_tabstrip = attached_tabstrip_ ?
1776 attached_tabstrip_ : source_tabstrip_;
1777 views::View* toplevel_view = owning_tabstrip->GetWidget()->GetContentsView();
1779 gfx::Point point = point_in_screen;
1780 views::View::ConvertPointFromScreen(toplevel_view, &point);
1781 return point.OffsetFromOrigin();
1784 gfx::NativeWindow TabDragController::GetLocalProcessWindow(
1785 const gfx::Point& screen_point,
1786 bool exclude_dragged_view) {
1787 std::set<gfx::NativeWindow> exclude;
1788 if (exclude_dragged_view) {
1789 gfx::NativeWindow dragged_window =
1790 attached_tabstrip_->GetWidget()->GetNativeWindow();
1792 exclude.insert(dragged_window);
1794 #if defined(OS_LINUX) && !defined(OS_CHROMEOS)
1795 // Exclude windows which are pending deletion via Browser::TabStripEmpty().
1796 // These windows can be returned in the Linux Aura port because the browser
1797 // window which was used for dragging is not hidden once all of its tabs are
1798 // attached to another browser window in DragBrowserToNewTabStrip().
1799 // TODO(pkotwicz): Fix this properly (crbug.com/358482)
1800 BrowserList* browser_list = BrowserList::GetInstance(
1801 chrome::HOST_DESKTOP_TYPE_NATIVE);
1802 for (BrowserList::const_iterator it = browser_list->begin();
1803 it != browser_list->end(); ++it) {
1804 if ((*it)->tab_strip_model()->empty())
1805 exclude.insert((*it)->window()->GetNativeWindow());
1808 return GetLocalProcessWindowAtPoint(host_desktop_type_,