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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_RENDERER_HOST_INPUT_STYLUS_TEXT_SELECTOR_H_
#define CONTENT_BROWSER_RENDERER_HOST_INPUT_STYLUS_TEXT_SELECTOR_H_
#include <memory>
#include "base/gtest_prod_util.h"
#include "base/memory/raw_ptr.h"
#include "base/time/time.h"
#include "content/common/content_export.h"
#include "ui/events/gesture_detection/gesture_listeners.h"
namespace ui {
class GestureDetector;
class MotionEvent;
}
namespace content {
class StylusTextSelectorTest;
// Interface with which the StylusTextSelector conveys drag and tap gestures
// when the activating button is pressed.
// selection handles, or long press.
class CONTENT_EXPORT StylusTextSelectorClient {
public:
virtual ~StylusTextSelectorClient() {}
// (x0, y0) and (x1, y1) indicate the bounds of the initial selection.
virtual void OnStylusSelectBegin(float x0, float y0, float x1, float y1) = 0;
virtual void OnStylusSelectUpdate(float x, float y) = 0;
virtual void OnStylusSelectEnd(float x, float y) = 0;
virtual void OnStylusSelectTap(base::TimeTicks time, float x, float y) = 0;
};
// Provides stylus-based text selection and interaction, including:
// * Selection manipulation when an activating stylus button is pressed and
// the stylus is dragged.
// * Word selection and context menu activation when the when an activating
// stylus button is pressed and the stylus is tapped.
class CONTENT_EXPORT StylusTextSelector : public ui::SimpleGestureListener {
public:
explicit StylusTextSelector(StylusTextSelectorClient* client);
StylusTextSelector(const StylusTextSelector&) = delete;
StylusTextSelector& operator=(const StylusTextSelector&) = delete;
~StylusTextSelector() override;
// This should be called before |event| is seen by the platform gesture
// detector or forwarded to web content.
bool OnTouchEvent(const ui::MotionEvent& event);
private:
enum DragState {
NO_DRAG,
DRAGGING_WITH_BUTTON_PRESSED,
DRAGGING_WITH_BUTTON_RELEASED,
};
friend class StylusTextSelectorTest;
FRIEND_TEST_ALL_PREFIXES(StylusTextSelectorTest, ShouldStartTextSelection);
// SimpleGestureListener implementation.
bool OnSingleTapUp(const ui::MotionEvent& e, int tap_count) override;
bool OnScroll(const ui::MotionEvent& e1,
const ui::MotionEvent& e2,
const ui::MotionEvent& secondary_pointer_down,
float distance_x,
float distance_y) override;
static bool ShouldStartTextSelection(const ui::MotionEvent& event);
raw_ptr<StylusTextSelectorClient> client_;
bool text_selection_triggered_;
bool secondary_button_pressed_;
DragState drag_state_;
float anchor_x_;
float anchor_y_;
std::unique_ptr<ui::GestureDetector> gesture_detector_;
};
} // namespace content
#endif // CONTENT_BROWSER_RENDERER_HOST_INPUT_STYLUS_TEXT_SELECTOR_H_
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