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/*
* Copyright (C) 2006, 2007, 2009, 2010, 2011 Apple Inc. All rights reserved.
* Copyright (C) 2015 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_EDITING_SELECTION_CONTROLLER_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_EDITING_SELECTION_CONTROLLER_H_
#include "base/macros.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/dom/document.h"
#include "third_party/blink/renderer/core/dom/document_shutdown_observer.h"
#include "third_party/blink/renderer/core/editing/frame_selection.h"
#include "third_party/blink/renderer/core/editing/position_with_affinity.h"
#include "third_party/blink/renderer/core/editing/text_granularity.h"
#include "third_party/blink/renderer/core/page/event_with_hit_test_results.h"
#include "third_party/blink/renderer/platform/heap/handle.h"
namespace blink {
class HitTestResult;
class LocalFrame;
class CORE_EXPORT SelectionController final
: public GarbageCollected<SelectionController>,
public DocumentShutdownObserver {
USING_GARBAGE_COLLECTED_MIXIN(SelectionController);
public:
explicit SelectionController(LocalFrame&);
virtual ~SelectionController();
void Trace(Visitor*) override;
bool HandleMousePressEvent(const MouseEventWithHitTestResults&);
void HandleMouseDraggedEvent(const MouseEventWithHitTestResults&,
const IntPoint&,
const PhysicalOffset&,
const PhysicalOffset&);
bool HandleMouseReleaseEvent(const MouseEventWithHitTestResults&,
const PhysicalOffset&);
bool HandlePasteGlobalSelection(const WebMouseEvent&);
bool HandleGestureLongPress(const HitTestResult&);
void HandleGestureTwoFingerTap(const GestureEventWithHitTestResults&);
void HandleGestureLongTap(const GestureEventWithHitTestResults&);
void UpdateSelectionForMouseDrag(const PhysicalOffset&,
const PhysicalOffset&);
void UpdateSelectionForMouseDrag(const HitTestResult&,
const PhysicalOffset&,
const PhysicalOffset&);
void SendContextMenuEvent(const MouseEventWithHitTestResults&,
const PhysicalOffset&);
void PassMousePressEventToSubframe(const MouseEventWithHitTestResults&);
void InitializeSelectionState();
void SetMouseDownMayStartSelect(bool);
bool MouseDownMayStartSelect() const;
bool MouseDownWasSingleClickInSelection() const;
void NotifySelectionChanged();
bool HasExtendedSelection() const {
return selection_state_ == SelectionState::kExtendedSelection;
}
private:
friend class SelectionControllerTest;
enum class AppendTrailingWhitespace { kShouldAppend, kDontAppend };
enum class SelectInputEventType { kTouch, kMouse };
enum EndPointsAdjustmentMode {
kAdjustEndpointsAtBidiBoundary,
kDoNotAdjustEndpoints
};
Document& GetDocument() const;
// Returns |true| if a word was selected.
bool SelectClosestWordFromHitTestResult(const HitTestResult&,
AppendTrailingWhitespace,
SelectInputEventType);
void SelectClosestMisspellingFromHitTestResult(const HitTestResult&,
AppendTrailingWhitespace);
// Returns |true| if a word was selected.
bool SelectClosestWordFromMouseEvent(const MouseEventWithHitTestResults&);
void SelectClosestMisspellingFromMouseEvent(
const MouseEventWithHitTestResults&);
void SelectClosestWordOrLinkFromMouseEvent(
const MouseEventWithHitTestResults&);
void SetNonDirectionalSelectionIfNeeded(const SelectionInFlatTree&,
const SetSelectionOptions&,
EndPointsAdjustmentMode);
void SetCaretAtHitTestResult(const HitTestResult&);
bool UpdateSelectionForMouseDownDispatchingSelectStart(
Node*,
const SelectionInFlatTree&,
const SetSelectionOptions&);
FrameSelection& Selection() const;
// Implements |DocumentShutdownObserver|.
// TODO(yosin): We should relocate |original_base_in_flat_tree_| when DOM tree
// changed.
void ContextDestroyed(Document*) final;
bool HandleSingleClick(const MouseEventWithHitTestResults&);
bool HandleDoubleClick(const MouseEventWithHitTestResults&);
bool HandleTripleClick(const MouseEventWithHitTestResults&);
bool HandleTapInsideSelection(const MouseEventWithHitTestResults&,
const SelectionInFlatTree&);
Member<LocalFrame> const frame_;
// Used to store base before the adjustment at bidi boundary
PositionInFlatTreeWithAffinity original_base_in_flat_tree_;
bool mouse_down_may_start_select_;
bool mouse_down_was_single_click_in_selection_;
bool mouse_down_allows_multi_click_;
enum class SelectionState {
kHaveNotStartedSelection,
kPlacedCaret,
kExtendedSelection
};
SelectionState selection_state_;
DISALLOW_COPY_AND_ASSIGN(SelectionController);
};
bool IsSelectionOverLink(const MouseEventWithHitTestResults&);
bool IsExtendingSelection(const MouseEventWithHitTestResults&);
CORE_EXPORT SelectionInFlatTree
AdjustSelectionWithTrailingWhitespace(const SelectionInFlatTree&);
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_EDITING_SELECTION_CONTROLLER_H_
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