| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "ash/common/wm/wm_toplevel_window_event_handler.h" |
| |
| #include "ash/common/wm/window_resizer.h" |
| #include "ash/common/wm/window_state.h" |
| #include "ash/common/wm/window_state_observer.h" |
| #include "ash/common/wm/wm_event.h" |
| #include "ash/common/wm_shell.h" |
| #include "ash/common/wm_window.h" |
| #include "ash/common/wm_window_observer.h" |
| #include "ui/base/hit_test.h" |
| #include "ui/events/event.h" |
| |
| namespace { |
| const double kMinHorizVelocityForWindowSwipe = 1100; |
| const double kMinVertVelocityForWindowMinimize = 1000; |
| } |
| |
| namespace ash { |
| namespace wm { |
| |
| namespace { |
| |
| // Returns whether |window| can be moved via a two finger drag given |
| // the hittest results of the two fingers. |
| bool CanStartTwoFingerMove(WmWindow* window, |
| int window_component1, |
| int window_component2) { |
| // We allow moving a window via two fingers when the hittest components are |
| // HTCLIENT. This is done so that a window can be dragged via two fingers when |
| // the tab strip is full and hitting the caption area is difficult. We check |
| // the window type and the state type so that we do not steal touches from the |
| // web contents. |
| if (!window->GetWindowState()->IsNormalOrSnapped() || |
| window->GetType() != ui::wm::WINDOW_TYPE_NORMAL) { |
| return false; |
| } |
| int component1_behavior = |
| WindowResizer::GetBoundsChangeForWindowComponent(window_component1); |
| int component2_behavior = |
| WindowResizer::GetBoundsChangeForWindowComponent(window_component2); |
| return (component1_behavior & WindowResizer::kBoundsChange_Resizes) == 0 && |
| (component2_behavior & WindowResizer::kBoundsChange_Resizes) == 0; |
| } |
| |
| // Returns whether |window| can be moved or resized via one finger given |
| // |window_component|. |
| bool CanStartOneFingerDrag(int window_component) { |
| return WindowResizer::GetBoundsChangeForWindowComponent(window_component) != |
| 0; |
| } |
| |
| // Returns the window component containing |event|'s location. |
| int GetWindowComponent(WmWindow* window, const ui::LocatedEvent& event) { |
| return window->GetNonClientComponent(event.location()); |
| } |
| |
| } // namespace |
| |
| // ScopedWindowResizer --------------------------------------------------------- |
| |
| // Wraps a WindowResizer and installs an observer on its target window. When |
| // the window is destroyed ResizerWindowDestroyed() is invoked back on the |
| // WmToplevelWindowEventHandler to clean up. |
| class WmToplevelWindowEventHandler::ScopedWindowResizer |
| : public WmWindowObserver, |
| public wm::WindowStateObserver { |
| public: |
| ScopedWindowResizer(WmToplevelWindowEventHandler* handler, |
| std::unique_ptr<WindowResizer> resizer); |
| ~ScopedWindowResizer() override; |
| |
| // Returns true if the drag moves the window and does not resize. |
| bool IsMove() const; |
| |
| WindowResizer* resizer() { return resizer_.get(); } |
| |
| // WindowObserver overrides: |
| void OnWindowDestroying(WmWindow* window) override; |
| |
| // WindowStateObserver overrides: |
| void OnPreWindowStateTypeChange(wm::WindowState* window_state, |
| wm::WindowStateType type) override; |
| |
| private: |
| WmToplevelWindowEventHandler* handler_; |
| std::unique_ptr<WindowResizer> resizer_; |
| |
| // Whether ScopedWindowResizer grabbed capture. |
| bool grabbed_capture_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ScopedWindowResizer); |
| }; |
| |
| WmToplevelWindowEventHandler::ScopedWindowResizer::ScopedWindowResizer( |
| WmToplevelWindowEventHandler* handler, |
| std::unique_ptr<WindowResizer> resizer) |
| : handler_(handler), resizer_(std::move(resizer)), grabbed_capture_(false) { |
| WmWindow* target = resizer_->GetTarget(); |
| target->AddObserver(this); |
| target->GetWindowState()->AddObserver(this); |
| |
| if (!target->HasCapture()) { |
| grabbed_capture_ = true; |
| target->SetCapture(); |
| } |
| } |
| |
| WmToplevelWindowEventHandler::ScopedWindowResizer::~ScopedWindowResizer() { |
| WmWindow* target = resizer_->GetTarget(); |
| target->RemoveObserver(this); |
| target->GetWindowState()->RemoveObserver(this); |
| if (grabbed_capture_) |
| target->ReleaseCapture(); |
| } |
| |
| bool WmToplevelWindowEventHandler::ScopedWindowResizer::IsMove() const { |
| return resizer_->details().bounds_change == |
| WindowResizer::kBoundsChange_Repositions; |
| } |
| |
| void WmToplevelWindowEventHandler::ScopedWindowResizer:: |
| OnPreWindowStateTypeChange(wm::WindowState* window_state, |
| wm::WindowStateType old) { |
| handler_->CompleteDrag(DragResult::SUCCESS); |
| } |
| |
| void WmToplevelWindowEventHandler::ScopedWindowResizer::OnWindowDestroying( |
| WmWindow* window) { |
| DCHECK_EQ(resizer_->GetTarget(), window); |
| handler_->ResizerWindowDestroyed(); |
| } |
| |
| // WmToplevelWindowEventHandler |
| // -------------------------------------------------- |
| |
| WmToplevelWindowEventHandler::WmToplevelWindowEventHandler(WmShell* shell) |
| : shell_(shell), first_finger_hittest_(HTNOWHERE) { |
| shell_->AddDisplayObserver(this); |
| } |
| |
| WmToplevelWindowEventHandler::~WmToplevelWindowEventHandler() { |
| shell_->RemoveDisplayObserver(this); |
| } |
| |
| void WmToplevelWindowEventHandler::OnKeyEvent(ui::KeyEvent* event) { |
| if (window_resizer_.get() && event->type() == ui::ET_KEY_PRESSED && |
| event->key_code() == ui::VKEY_ESCAPE) { |
| CompleteDrag(DragResult::REVERT); |
| } |
| } |
| |
| void WmToplevelWindowEventHandler::OnMouseEvent(ui::MouseEvent* event, |
| WmWindow* target) { |
| if (event->handled()) |
| return; |
| if ((event->flags() & |
| (ui::EF_MIDDLE_MOUSE_BUTTON | ui::EF_RIGHT_MOUSE_BUTTON)) != 0) |
| return; |
| |
| if (event->type() == ui::ET_MOUSE_CAPTURE_CHANGED) { |
| // Capture is grabbed when both gesture and mouse drags start. Handle |
| // capture loss regardless of which type of drag is in progress. |
| HandleCaptureLost(event); |
| return; |
| } |
| |
| if (in_gesture_drag_) |
| return; |
| |
| switch (event->type()) { |
| case ui::ET_MOUSE_PRESSED: |
| HandleMousePressed(target, event); |
| break; |
| case ui::ET_MOUSE_DRAGGED: |
| HandleDrag(target, event); |
| break; |
| case ui::ET_MOUSE_RELEASED: |
| HandleMouseReleased(target, event); |
| break; |
| case ui::ET_MOUSE_MOVED: |
| HandleMouseMoved(target, event); |
| break; |
| case ui::ET_MOUSE_EXITED: |
| HandleMouseExited(target, event); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| void WmToplevelWindowEventHandler::OnGestureEvent(ui::GestureEvent* event, |
| WmWindow* target) { |
| if (event->handled()) |
| return; |
| if (!target->HasNonClientArea()) |
| return; |
| |
| if (window_resizer_.get() && !in_gesture_drag_) |
| return; |
| |
| if (window_resizer_.get() && |
| window_resizer_->resizer()->GetTarget() != target) { |
| return; |
| } |
| |
| if (event->details().touch_points() > 2) { |
| if (CompleteDrag(DragResult::SUCCESS)) |
| event->StopPropagation(); |
| return; |
| } |
| |
| switch (event->type()) { |
| case ui::ET_GESTURE_TAP_DOWN: { |
| int component = GetWindowComponent(target, *event); |
| if (!(WindowResizer::GetBoundsChangeForWindowComponent(component) & |
| WindowResizer::kBoundsChange_Resizes)) |
| return; |
| target->ShowResizeShadow(component); |
| return; |
| } |
| case ui::ET_GESTURE_END: { |
| target->HideResizeShadow(); |
| |
| if (window_resizer_.get() && |
| (event->details().touch_points() == 1 || |
| !CanStartOneFingerDrag(first_finger_hittest_))) { |
| CompleteDrag(DragResult::SUCCESS); |
| event->StopPropagation(); |
| } |
| return; |
| } |
| case ui::ET_GESTURE_BEGIN: { |
| if (event->details().touch_points() == 1) { |
| first_finger_hittest_ = GetWindowComponent(target, *event); |
| } else if (window_resizer_.get()) { |
| if (!window_resizer_->IsMove()) { |
| // The transition from resizing with one finger to resizing with two |
| // fingers causes unintended resizing because the location of |
| // ET_GESTURE_SCROLL_UPDATE jumps from the position of the first |
| // finger to the position in the middle of the two fingers. For this |
| // reason two finger resizing is not supported. |
| CompleteDrag(DragResult::SUCCESS); |
| event->StopPropagation(); |
| } |
| } else { |
| int second_finger_hittest = GetWindowComponent(target, *event); |
| if (CanStartTwoFingerMove(target, first_finger_hittest_, |
| second_finger_hittest)) { |
| gfx::Point location_in_parent = |
| event->details().bounding_box().CenterPoint(); |
| AttemptToStartDrag(target, location_in_parent, HTCAPTION, |
| aura::client::WINDOW_MOVE_SOURCE_TOUCH, |
| EndClosure()); |
| event->StopPropagation(); |
| } |
| } |
| return; |
| } |
| case ui::ET_GESTURE_SCROLL_BEGIN: { |
| // The one finger drag is not started in ET_GESTURE_BEGIN to avoid the |
| // window jumping upon initiating a two finger drag. When a one finger |
| // drag is converted to a two finger drag, a jump occurs because the |
| // location of the ET_GESTURE_SCROLL_UPDATE event switches from the single |
| // finger's position to the position in the middle of the two fingers. |
| if (window_resizer_.get()) |
| return; |
| int component = GetWindowComponent(target, *event); |
| if (!CanStartOneFingerDrag(component)) |
| return; |
| gfx::Point location_in_parent( |
| target->ConvertPointToTarget(target->GetParent(), event->location())); |
| AttemptToStartDrag(target, location_in_parent, component, |
| aura::client::WINDOW_MOVE_SOURCE_TOUCH, EndClosure()); |
| event->StopPropagation(); |
| return; |
| } |
| default: |
| break; |
| } |
| |
| if (!window_resizer_.get()) |
| return; |
| |
| switch (event->type()) { |
| case ui::ET_GESTURE_SCROLL_UPDATE: |
| HandleDrag(target, event); |
| event->StopPropagation(); |
| return; |
| case ui::ET_GESTURE_SCROLL_END: |
| // We must complete the drag here instead of as a result of ET_GESTURE_END |
| // because otherwise the drag will be reverted when EndMoveLoop() is |
| // called. |
| // TODO(pkotwicz): Pass drag completion status to |
| // WindowMoveClient::EndMoveLoop(). |
| CompleteDrag(DragResult::SUCCESS); |
| event->StopPropagation(); |
| return; |
| case ui::ET_SCROLL_FLING_START: |
| CompleteDrag(DragResult::SUCCESS); |
| |
| // TODO(pkotwicz): Fix tests which inadvertantly start flings and check |
| // window_resizer_->IsMove() instead of the hittest component at |event|'s |
| // location. |
| if (GetWindowComponent(target, *event) != HTCAPTION || |
| !target->GetWindowState()->IsNormalOrSnapped()) { |
| return; |
| } |
| |
| if (event->details().velocity_y() > kMinVertVelocityForWindowMinimize) { |
| SetWindowStateTypeFromGesture(target, wm::WINDOW_STATE_TYPE_MINIMIZED); |
| } else if (event->details().velocity_y() < |
| -kMinVertVelocityForWindowMinimize) { |
| SetWindowStateTypeFromGesture(target, wm::WINDOW_STATE_TYPE_MAXIMIZED); |
| } else if (event->details().velocity_x() > |
| kMinHorizVelocityForWindowSwipe) { |
| SetWindowStateTypeFromGesture(target, |
| wm::WINDOW_STATE_TYPE_RIGHT_SNAPPED); |
| } else if (event->details().velocity_x() < |
| -kMinHorizVelocityForWindowSwipe) { |
| SetWindowStateTypeFromGesture(target, |
| wm::WINDOW_STATE_TYPE_LEFT_SNAPPED); |
| } |
| event->StopPropagation(); |
| return; |
| case ui::ET_GESTURE_SWIPE: |
| DCHECK_GT(event->details().touch_points(), 0); |
| if (event->details().touch_points() == 1) |
| return; |
| if (!target->GetWindowState()->IsNormalOrSnapped()) |
| return; |
| |
| CompleteDrag(DragResult::SUCCESS); |
| |
| if (event->details().swipe_down()) { |
| SetWindowStateTypeFromGesture(target, wm::WINDOW_STATE_TYPE_MINIMIZED); |
| } else if (event->details().swipe_up()) { |
| SetWindowStateTypeFromGesture(target, wm::WINDOW_STATE_TYPE_MAXIMIZED); |
| } else if (event->details().swipe_right()) { |
| SetWindowStateTypeFromGesture(target, |
| wm::WINDOW_STATE_TYPE_RIGHT_SNAPPED); |
| } else { |
| SetWindowStateTypeFromGesture(target, |
| wm::WINDOW_STATE_TYPE_LEFT_SNAPPED); |
| } |
| event->StopPropagation(); |
| return; |
| default: |
| return; |
| } |
| } |
| |
| bool WmToplevelWindowEventHandler::AttemptToStartDrag( |
| WmWindow* window, |
| const gfx::Point& point_in_parent, |
| int window_component, |
| aura::client::WindowMoveSource source, |
| const EndClosure& end_closure) { |
| if (window_resizer_.get()) |
| return false; |
| std::unique_ptr<WindowResizer> resizer( |
| CreateWindowResizer(window, point_in_parent, window_component, source)); |
| if (!resizer) |
| return false; |
| |
| end_closure_ = end_closure; |
| window_resizer_.reset(new ScopedWindowResizer(this, std::move(resizer))); |
| |
| pre_drag_window_bounds_ = window->GetBounds(); |
| in_gesture_drag_ = (source == aura::client::WINDOW_MOVE_SOURCE_TOUCH); |
| return true; |
| } |
| |
| void WmToplevelWindowEventHandler::RevertDrag() { |
| CompleteDrag(DragResult::REVERT); |
| } |
| |
| bool WmToplevelWindowEventHandler::CompleteDrag(DragResult result) { |
| if (!window_resizer_) |
| return false; |
| |
| std::unique_ptr<ScopedWindowResizer> resizer(std::move(window_resizer_)); |
| switch (result) { |
| case DragResult::SUCCESS: |
| resizer->resizer()->CompleteDrag(); |
| break; |
| case DragResult::REVERT: |
| resizer->resizer()->RevertDrag(); |
| break; |
| case DragResult::WINDOW_DESTROYED: |
| // We explicitly do not invoke RevertDrag() since that may do things to |
| // the window that was destroyed. |
| break; |
| } |
| |
| first_finger_hittest_ = HTNOWHERE; |
| in_gesture_drag_ = false; |
| if (!end_closure_.is_null()) { |
| // Clear local state in case running the closure deletes us. |
| EndClosure end_closure = end_closure_; |
| end_closure_.Reset(); |
| end_closure.Run(result); |
| } |
| return true; |
| } |
| |
| void WmToplevelWindowEventHandler::HandleMousePressed(WmWindow* target, |
| ui::MouseEvent* event) { |
| if (event->phase() != ui::EP_PRETARGET || !target->HasNonClientArea()) |
| return; |
| |
| // We also update the current window component here because for the |
| // mouse-drag-release-press case, where the mouse is released and |
| // pressed without mouse move event. |
| int component = GetWindowComponent(target, *event); |
| if ((event->flags() & (ui::EF_IS_DOUBLE_CLICK | ui::EF_IS_TRIPLE_CLICK)) == |
| 0 && |
| WindowResizer::GetBoundsChangeForWindowComponent(component)) { |
| gfx::Point location_in_parent( |
| target->ConvertPointToTarget(target->GetParent(), event->location())); |
| AttemptToStartDrag(target, location_in_parent, component, |
| aura::client::WINDOW_MOVE_SOURCE_MOUSE, EndClosure()); |
| // Set as handled so that other event handlers do no act upon the event |
| // but still receive it so that they receive both parts of each pressed/ |
| // released pair. |
| event->SetHandled(); |
| } else { |
| CompleteDrag(DragResult::SUCCESS); |
| } |
| } |
| |
| void WmToplevelWindowEventHandler::HandleMouseReleased(WmWindow* target, |
| ui::MouseEvent* event) { |
| if (event->phase() == ui::EP_PRETARGET) |
| CompleteDrag(DragResult::SUCCESS); |
| } |
| |
| void WmToplevelWindowEventHandler::HandleDrag(WmWindow* target, |
| ui::LocatedEvent* event) { |
| // This function only be triggered to move window |
| // by mouse drag or touch move event. |
| DCHECK(event->type() == ui::ET_MOUSE_DRAGGED || |
| event->type() == ui::ET_TOUCH_MOVED || |
| event->type() == ui::ET_GESTURE_SCROLL_UPDATE); |
| |
| // Drag actions are performed pre-target handling to prevent spurious mouse |
| // moves from the move/size operation from being sent to the target. |
| if (event->phase() != ui::EP_PRETARGET) |
| return; |
| |
| if (!window_resizer_) |
| return; |
| window_resizer_->resizer()->Drag( |
| target->ConvertPointToTarget(target->GetParent(), event->location()), |
| event->flags()); |
| event->StopPropagation(); |
| } |
| |
| void WmToplevelWindowEventHandler::HandleMouseMoved(WmWindow* target, |
| ui::LocatedEvent* event) { |
| // Shadow effects are applied after target handling. Note that we don't |
| // respect ER_HANDLED here right now since we have not had a reason to allow |
| // the target to cancel shadow rendering. |
| if (event->phase() != ui::EP_POSTTARGET || !target->HasNonClientArea()) |
| return; |
| |
| // TODO(jamescook): Move the resize cursor update code into here from |
| // CompoundEventFilter? |
| if (event->flags() & ui::EF_IS_NON_CLIENT) { |
| int component = target->GetNonClientComponent(event->location()); |
| target->ShowResizeShadow(component); |
| } else { |
| target->HideResizeShadow(); |
| } |
| } |
| |
| void WmToplevelWindowEventHandler::HandleMouseExited(WmWindow* target, |
| ui::LocatedEvent* event) { |
| // Shadow effects are applied after target handling. Note that we don't |
| // respect ER_HANDLED here right now since we have not had a reason to allow |
| // the target to cancel shadow rendering. |
| if (event->phase() != ui::EP_POSTTARGET) |
| return; |
| |
| target->HideResizeShadow(); |
| } |
| |
| void WmToplevelWindowEventHandler::HandleCaptureLost(ui::LocatedEvent* event) { |
| if (event->phase() == ui::EP_PRETARGET) { |
| // We complete the drag instead of reverting it, as reverting it will result |
| // in a weird behavior when a dragged tab produces a modal dialog while the |
| // drag is in progress. crbug.com/558201. |
| CompleteDrag(DragResult::SUCCESS); |
| } |
| } |
| |
| void WmToplevelWindowEventHandler::SetWindowStateTypeFromGesture( |
| WmWindow* window, |
| wm::WindowStateType new_state_type) { |
| wm::WindowState* window_state = window->GetWindowState(); |
| // TODO(oshima): Move extra logic (set_unminimize_to_restore_bounds, |
| // SetRestoreBoundsInParent) that modifies the window state |
| // into WindowState. |
| switch (new_state_type) { |
| case wm::WINDOW_STATE_TYPE_MINIMIZED: |
| if (window_state->CanMinimize()) { |
| window_state->Minimize(); |
| window_state->set_unminimize_to_restore_bounds(true); |
| window_state->SetRestoreBoundsInParent(pre_drag_window_bounds_); |
| } |
| break; |
| case wm::WINDOW_STATE_TYPE_MAXIMIZED: |
| if (window_state->CanMaximize()) { |
| window_state->SetRestoreBoundsInParent(pre_drag_window_bounds_); |
| window_state->Maximize(); |
| } |
| break; |
| case wm::WINDOW_STATE_TYPE_LEFT_SNAPPED: |
| if (window_state->CanSnap()) { |
| window_state->SetRestoreBoundsInParent(pre_drag_window_bounds_); |
| const wm::WMEvent event(wm::WM_EVENT_SNAP_LEFT); |
| window_state->OnWMEvent(&event); |
| } |
| break; |
| case wm::WINDOW_STATE_TYPE_RIGHT_SNAPPED: |
| if (window_state->CanSnap()) { |
| window_state->SetRestoreBoundsInParent(pre_drag_window_bounds_); |
| const wm::WMEvent event(wm::WM_EVENT_SNAP_RIGHT); |
| window_state->OnWMEvent(&event); |
| } |
| break; |
| default: |
| NOTREACHED(); |
| } |
| } |
| |
| void WmToplevelWindowEventHandler::ResizerWindowDestroyed() { |
| CompleteDrag(DragResult::WINDOW_DESTROYED); |
| } |
| |
| void WmToplevelWindowEventHandler::OnDisplayConfigurationChanging() { |
| CompleteDrag(DragResult::REVERT); |
| } |
| |
| } // namespace wm |
| } // namespace ash |
