| // Copyright 2014 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 "content/browser/renderer_host/input/touch_selection_controller.h" |
| |
| #include "base/auto_reset.h" |
| #include "base/logging.h" |
| #include "third_party/WebKit/public/web/WebInputEvent.h" |
| |
| namespace content { |
| namespace { |
| |
| TouchHandleOrientation ToTouchHandleOrientation(cc::SelectionBoundType type) { |
| switch (type) { |
| case cc::SELECTION_BOUND_LEFT: |
| return TOUCH_HANDLE_LEFT; |
| case cc::SELECTION_BOUND_RIGHT: |
| return TOUCH_HANDLE_RIGHT; |
| case cc::SELECTION_BOUND_CENTER: |
| return TOUCH_HANDLE_CENTER; |
| case cc::SELECTION_BOUND_EMPTY: |
| return TOUCH_HANDLE_ORIENTATION_UNDEFINED; |
| } |
| NOTREACHED() << "Invalid selection bound type: " << type; |
| return TOUCH_HANDLE_ORIENTATION_UNDEFINED; |
| } |
| |
| } // namespace |
| |
| TouchSelectionController::TouchSelectionController( |
| TouchSelectionControllerClient* client, |
| base::TimeDelta tap_timeout, |
| float tap_slop) |
| : client_(client), |
| tap_timeout_(tap_timeout), |
| tap_slop_(tap_slop), |
| response_pending_input_event_(INPUT_EVENT_TYPE_NONE), |
| start_orientation_(TOUCH_HANDLE_ORIENTATION_UNDEFINED), |
| end_orientation_(TOUCH_HANDLE_ORIENTATION_UNDEFINED), |
| is_insertion_active_(false), |
| activate_insertion_automatically_(false), |
| is_selection_active_(false), |
| activate_selection_automatically_(false), |
| selection_empty_(false), |
| selection_editable_(false), |
| temporarily_hidden_(false) { |
| DCHECK(client_); |
| HideAndDisallowShowingAutomatically(); |
| } |
| |
| TouchSelectionController::~TouchSelectionController() { |
| } |
| |
| void TouchSelectionController::OnSelectionBoundsChanged( |
| const cc::ViewportSelectionBound& start, |
| const cc::ViewportSelectionBound& end) { |
| if (!activate_selection_automatically_ && |
| !activate_insertion_automatically_) { |
| DCHECK_EQ(INPUT_EVENT_TYPE_NONE, response_pending_input_event_); |
| return; |
| } |
| |
| if (start == start_ && end_ == end) |
| return; |
| |
| start_ = start; |
| end_ = end; |
| start_orientation_ = ToTouchHandleOrientation(start_.type); |
| end_orientation_ = ToTouchHandleOrientation(end_.type); |
| |
| // Ensure that |response_pending_input_event_| is cleared after the method |
| // completes, while also making its current value available for the duration |
| // of the call. |
| InputEventType causal_input_event = response_pending_input_event_; |
| response_pending_input_event_ = INPUT_EVENT_TYPE_NONE; |
| base::AutoReset<InputEventType> auto_reset_response_pending_input_event( |
| &response_pending_input_event_, causal_input_event); |
| |
| const bool is_selection_dragging = |
| is_selection_active_ && (start_selection_handle_->is_dragging() || |
| end_selection_handle_->is_dragging()); |
| |
| // It's possible that the bounds temporarily overlap while a selection handle |
| // is being dragged, incorrectly reporting a CENTER orientation. |
| // TODO(jdduke): This safeguard is racy, as it's possible the delayed response |
| // from handle positioning occurs *after* the handle dragging has ceased. |
| // Instead, prevent selection -> insertion transitions without an intervening |
| // action or selection clearing of some sort, crbug.com/392696. |
| if (is_selection_dragging) { |
| if (start_orientation_ == TOUCH_HANDLE_CENTER) |
| start_orientation_ = start_selection_handle_->orientation(); |
| if (end_orientation_ == TOUCH_HANDLE_CENTER) |
| end_orientation_ = end_selection_handle_->orientation(); |
| } |
| |
| if (GetStartPosition() != GetEndPosition() || |
| (is_selection_dragging && |
| start_orientation_ != TOUCH_HANDLE_ORIENTATION_UNDEFINED && |
| end_orientation_ != TOUCH_HANDLE_ORIENTATION_UNDEFINED)) { |
| OnSelectionChanged(); |
| return; |
| } |
| |
| if (start_orientation_ == TOUCH_HANDLE_CENTER && selection_editable_) { |
| OnInsertionChanged(); |
| return; |
| } |
| |
| HideAndDisallowShowingAutomatically(); |
| } |
| |
| bool TouchSelectionController::WillHandleTouchEvent( |
| const ui::MotionEvent& event) { |
| if (is_insertion_active_) { |
| DCHECK(insertion_handle_); |
| return insertion_handle_->WillHandleTouchEvent(event); |
| } |
| |
| if (is_selection_active_) { |
| DCHECK(start_selection_handle_); |
| DCHECK(end_selection_handle_); |
| if (start_selection_handle_->is_dragging()) |
| return start_selection_handle_->WillHandleTouchEvent(event); |
| |
| if (end_selection_handle_->is_dragging()) |
| return end_selection_handle_->WillHandleTouchEvent(event); |
| |
| const gfx::PointF event_pos(event.GetX(), event.GetY()); |
| if ((event_pos - GetStartPosition()).LengthSquared() <= |
| (event_pos - GetEndPosition()).LengthSquared()) |
| return start_selection_handle_->WillHandleTouchEvent(event); |
| else |
| return end_selection_handle_->WillHandleTouchEvent(event); |
| } |
| |
| return false; |
| } |
| |
| void TouchSelectionController::OnLongPressEvent() { |
| response_pending_input_event_ = LONG_PRESS; |
| ShowSelectionHandlesAutomatically(); |
| ShowInsertionHandleAutomatically(); |
| ResetCachedValuesIfInactive(); |
| } |
| |
| void TouchSelectionController::OnTapEvent() { |
| response_pending_input_event_ = TAP; |
| ShowInsertionHandleAutomatically(); |
| if (selection_empty_) |
| DeactivateInsertion(); |
| ResetCachedValuesIfInactive(); |
| } |
| |
| void TouchSelectionController::HideAndDisallowShowingAutomatically() { |
| response_pending_input_event_ = INPUT_EVENT_TYPE_NONE; |
| DeactivateInsertion(); |
| DeactivateSelection(); |
| activate_insertion_automatically_ = false; |
| activate_selection_automatically_ = false; |
| } |
| |
| void TouchSelectionController::OnSelectionEditable(bool editable) { |
| if (selection_editable_ == editable) |
| return; |
| selection_editable_ = editable; |
| ResetCachedValuesIfInactive(); |
| if (!selection_editable_) |
| DeactivateInsertion(); |
| } |
| |
| void TouchSelectionController::OnSelectionEmpty(bool empty) { |
| if (selection_empty_ == empty) |
| return; |
| selection_empty_ = empty; |
| ResetCachedValuesIfInactive(); |
| } |
| |
| bool TouchSelectionController::Animate(base::TimeTicks frame_time) { |
| if (is_insertion_active_) |
| return insertion_handle_->Animate(frame_time); |
| |
| if (is_selection_active_) { |
| bool needs_animate = start_selection_handle_->Animate(frame_time); |
| needs_animate |= end_selection_handle_->Animate(frame_time); |
| return needs_animate; |
| } |
| |
| return false; |
| } |
| |
| void TouchSelectionController::OnHandleDragBegin(const TouchHandle& handle) { |
| if (&handle == insertion_handle_.get()) { |
| client_->OnSelectionEvent(INSERTION_DRAG_STARTED, handle.position()); |
| return; |
| } |
| |
| if (&handle == start_selection_handle_.get()) { |
| fixed_handle_position_ = |
| end_selection_handle_->position() + GetEndLineOffset(); |
| } else { |
| fixed_handle_position_ = |
| start_selection_handle_->position() + GetStartLineOffset(); |
| } |
| client_->OnSelectionEvent(SELECTION_DRAG_STARTED, handle.position()); |
| } |
| |
| void TouchSelectionController::OnHandleDragUpdate(const TouchHandle& handle, |
| const gfx::PointF& position) { |
| // As the position corresponds to the bottom left point of the selection |
| // bound, offset it by half the corresponding line height. |
| gfx::Vector2dF line_offset = &handle == end_selection_handle_.get() |
| ? GetStartLineOffset() |
| : GetEndLineOffset(); |
| gfx::PointF line_position = position + line_offset; |
| if (&handle == insertion_handle_.get()) { |
| client_->MoveCaret(line_position); |
| } else { |
| client_->SelectBetweenCoordinates(fixed_handle_position_, line_position); |
| } |
| } |
| |
| void TouchSelectionController::OnHandleDragEnd(const TouchHandle& handle) { |
| if (&handle != insertion_handle_.get()) |
| client_->OnSelectionEvent(SELECTION_DRAG_STOPPED, handle.position()); |
| } |
| |
| void TouchSelectionController::OnHandleTapped(const TouchHandle& handle) { |
| if (insertion_handle_ && &handle == insertion_handle_.get()) |
| client_->OnSelectionEvent(INSERTION_TAPPED, handle.position()); |
| } |
| |
| void TouchSelectionController::SetNeedsAnimate() { |
| client_->SetNeedsAnimate(); |
| } |
| |
| scoped_ptr<TouchHandleDrawable> TouchSelectionController::CreateDrawable() { |
| return client_->CreateDrawable(); |
| } |
| |
| base::TimeDelta TouchSelectionController::GetTapTimeout() const { |
| return tap_timeout_; |
| } |
| |
| float TouchSelectionController::GetTapSlop() const { |
| return tap_slop_; |
| } |
| |
| void TouchSelectionController::ShowInsertionHandleAutomatically() { |
| if (activate_insertion_automatically_) |
| return; |
| activate_insertion_automatically_ = true; |
| ResetCachedValuesIfInactive(); |
| } |
| |
| void TouchSelectionController::ShowSelectionHandlesAutomatically() { |
| if (activate_selection_automatically_) |
| return; |
| activate_selection_automatically_ = true; |
| ResetCachedValuesIfInactive(); |
| } |
| |
| void TouchSelectionController::OnInsertionChanged() { |
| DeactivateSelection(); |
| |
| if (response_pending_input_event_ == TAP && selection_empty_) { |
| HideAndDisallowShowingAutomatically(); |
| return; |
| } |
| |
| if (!activate_insertion_automatically_) |
| return; |
| |
| const bool was_active = is_insertion_active_; |
| const gfx::PointF position = GetStartPosition(); |
| if (!is_insertion_active_) |
| ActivateInsertion(); |
| else |
| client_->OnSelectionEvent(INSERTION_MOVED, position); |
| |
| insertion_handle_->SetVisible(GetStartVisible(), |
| GetAnimationStyle(was_active)); |
| insertion_handle_->SetPosition(position); |
| } |
| |
| void TouchSelectionController::OnSelectionChanged() { |
| DeactivateInsertion(); |
| |
| if (!activate_selection_automatically_) |
| return; |
| |
| const bool was_active = is_selection_active_; |
| ActivateSelection(); |
| |
| const TouchHandle::AnimationStyle animation = GetAnimationStyle(was_active); |
| start_selection_handle_->SetVisible(GetStartVisible(), animation); |
| end_selection_handle_->SetVisible(GetEndVisible(), animation); |
| |
| start_selection_handle_->SetPosition(GetStartPosition()); |
| end_selection_handle_->SetPosition(GetEndPosition()); |
| } |
| |
| void TouchSelectionController::ActivateInsertion() { |
| DCHECK(!is_selection_active_); |
| |
| if (!insertion_handle_) |
| insertion_handle_.reset(new TouchHandle(this, TOUCH_HANDLE_CENTER)); |
| |
| if (!is_insertion_active_) { |
| is_insertion_active_ = true; |
| insertion_handle_->SetEnabled(true); |
| client_->OnSelectionEvent(INSERTION_SHOWN, GetStartPosition()); |
| } |
| } |
| |
| void TouchSelectionController::DeactivateInsertion() { |
| if (!is_insertion_active_) |
| return; |
| DCHECK(insertion_handle_); |
| is_insertion_active_ = false; |
| insertion_handle_->SetEnabled(false); |
| client_->OnSelectionEvent(INSERTION_CLEARED, gfx::PointF()); |
| } |
| |
| void TouchSelectionController::ActivateSelection() { |
| DCHECK(!is_insertion_active_); |
| |
| if (!start_selection_handle_) { |
| start_selection_handle_.reset(new TouchHandle(this, start_orientation_)); |
| } else { |
| start_selection_handle_->SetEnabled(true); |
| start_selection_handle_->SetOrientation(start_orientation_); |
| } |
| |
| if (!end_selection_handle_) { |
| end_selection_handle_.reset(new TouchHandle(this, end_orientation_)); |
| } else { |
| end_selection_handle_->SetEnabled(true); |
| end_selection_handle_->SetOrientation(end_orientation_); |
| } |
| |
| // As a long press received while a selection is already active may trigger |
| // an entirely new selection, notify the client but avoid sending an |
| // intervening SELECTION_CLEARED update to avoid unnecessary state changes. |
| if (!is_selection_active_ || response_pending_input_event_ == LONG_PRESS) { |
| is_selection_active_ = true; |
| response_pending_input_event_ = INPUT_EVENT_TYPE_NONE; |
| client_->OnSelectionEvent(SELECTION_SHOWN, GetStartPosition()); |
| } |
| } |
| |
| void TouchSelectionController::DeactivateSelection() { |
| if (!is_selection_active_) |
| return; |
| DCHECK(start_selection_handle_); |
| DCHECK(end_selection_handle_); |
| start_selection_handle_->SetEnabled(false); |
| end_selection_handle_->SetEnabled(false); |
| is_selection_active_ = false; |
| client_->OnSelectionEvent(SELECTION_CLEARED, gfx::PointF()); |
| } |
| |
| void TouchSelectionController::ResetCachedValuesIfInactive() { |
| if (is_selection_active_ || is_insertion_active_) |
| return; |
| start_ = cc::ViewportSelectionBound(); |
| end_ = cc::ViewportSelectionBound(); |
| start_orientation_ = TOUCH_HANDLE_ORIENTATION_UNDEFINED; |
| end_orientation_ = TOUCH_HANDLE_ORIENTATION_UNDEFINED; |
| } |
| |
| const gfx::PointF& TouchSelectionController::GetStartPosition() const { |
| return start_.edge_bottom; |
| } |
| |
| const gfx::PointF& TouchSelectionController::GetEndPosition() const { |
| return end_.edge_bottom; |
| } |
| |
| gfx::Vector2dF TouchSelectionController::GetStartLineOffset() const { |
| return gfx::ScaleVector2d(start_.edge_top - start_.edge_bottom, 0.5f); |
| } |
| |
| gfx::Vector2dF TouchSelectionController::GetEndLineOffset() const { |
| return gfx::ScaleVector2d(end_.edge_top - end_.edge_bottom, 0.5f); |
| } |
| |
| bool TouchSelectionController::GetStartVisible() const { |
| return start_.visible && !temporarily_hidden_; |
| } |
| |
| bool TouchSelectionController::GetEndVisible() const { |
| return end_.visible && !temporarily_hidden_; |
| } |
| |
| TouchHandle::AnimationStyle TouchSelectionController::GetAnimationStyle( |
| bool was_active) const { |
| return was_active && client_->SupportsAnimation() |
| ? TouchHandle::ANIMATION_SMOOTH |
| : TouchHandle::ANIMATION_NONE; |
| } |
| |
| } // namespace content |