60 lines
2.1 KiB
C
60 lines
2.1 KiB
C
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// Copyright (c) 2017 The Chromium Embedded Framework Authors.
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// Portions copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef CEF_LIBCEF_BROWSER_OSR_MOTION_EVENT_OSR_H_
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#define CEF_LIBCEF_BROWSER_OSR_MOTION_EVENT_OSR_H_
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#pragma once
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#include "include/cef_base.h"
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#include "third_party/blink/public/platform/web_touch_event.h"
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#include "ui/events/gesture_detection/motion_event_generic.h"
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// Implementation of MotionEvent which takes a stream of CefTouchEvents.
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// This class is based on ui::MotionEventAura.
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class CefMotionEventOSR : public ui::MotionEventGeneric {
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public:
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CefMotionEventOSR();
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~CefMotionEventOSR() override;
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int GetSourceDeviceId(size_t pointer_index) const override;
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// Returns true if the touch was valid.
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bool OnTouch(const CefTouchEvent& touch);
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// We can't cleanup removed touch points immediately upon receipt of a
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// TouchCancel or TouchRelease, as the MotionEvent needs to be able to report
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// information about those touch events. Once the MotionEvent has been
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// processed, we call CleanupRemovedTouchPoints to do the required
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// book-keeping.
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void CleanupRemovedTouchPoints(const CefTouchEvent& event);
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// Reset unchanged touch point to StateStationary for touchmove and
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// touchcancel to make sure only send one ack per WebTouchEvent.
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void MarkUnchangedTouchPointsAsStationary(blink::WebTouchEvent* event,
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const CefTouchEvent& cef_event);
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private:
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// Chromium can't cope with touch ids >31, so let's map the incoming
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// ids to a safe range.
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int id_map_[blink::WebTouchEvent::kTouchesLengthCap];
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int LookupId(int id);
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int AddId(int id);
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void RemoveId(int id);
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bool AddTouch(const CefTouchEvent& touch, int id);
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void UpdateTouch(const CefTouchEvent& touch, int id);
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void UpdateCachedAction(const CefTouchEvent& touch, int id);
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bool IsValidIndex(int index) const;
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ui::PointerProperties GetPointerPropertiesFromTouchEvent(
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const CefTouchEvent& touch,
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int id);
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DISALLOW_COPY_AND_ASSIGN(CefMotionEventOSR);
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};
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#endif
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