mirror of
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217 lines
6.7 KiB
C++
217 lines
6.7 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_TouchEvents_h__
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#define mozilla_TouchEvents_h__
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#include <stdint.h>
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#include "mozilla/dom/Touch.h"
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#include "mozilla/MouseEvents.h"
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#include "nsAutoPtr.h"
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#include "nsIDOMSimpleGestureEvent.h"
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#include "nsTArray.h"
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namespace mozilla {
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/******************************************************************************
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* mozilla::WidgetGestureNotifyEvent
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*
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* This event is the first event generated when the user touches
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* the screen with a finger, and it's meant to decide what kind
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* of action we'll use for that touch interaction.
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*
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* The event is dispatched to the layout and based on what is underneath
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* the initial contact point it's then decided if we should pan
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* (finger scrolling) or drag the target element.
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******************************************************************************/
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class WidgetGestureNotifyEvent : public WidgetGUIEvent
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{
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public:
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virtual WidgetGestureNotifyEvent* AsGestureNotifyEvent() MOZ_OVERRIDE
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{
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return this;
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}
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WidgetGestureNotifyEvent(bool aIsTrusted, uint32_t aMessage,
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nsIWidget *aWidget) :
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WidgetGUIEvent(aIsTrusted, aMessage, aWidget, NS_GESTURENOTIFY_EVENT),
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panDirection(ePanNone), displayPanFeedback(false)
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{
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}
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virtual WidgetEvent* Duplicate() const MOZ_OVERRIDE
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{
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// XXX Looks like this event is handled only in PostHandleEvent() of
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// EventStateManager. Therefore, it might be possible to handle this
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// in PreHandleEvent() and not to dispatch as a DOM event into the DOM
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// tree like ContentQueryEvent. Then, this event doesn't need to
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// support Duplicate().
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MOZ_ASSERT(eventStructType == NS_GESTURENOTIFY_EVENT,
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"Duplicate() must be overridden by sub class");
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// Not copying widget, it is a weak reference.
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WidgetGestureNotifyEvent* result =
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new WidgetGestureNotifyEvent(false, message, nullptr);
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result->AssignGestureNotifyEventData(*this, true);
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result->mFlags = mFlags;
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return result;
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}
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enum ePanDirection
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{
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ePanNone,
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ePanVertical,
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ePanHorizontal,
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ePanBoth
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};
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ePanDirection panDirection;
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bool displayPanFeedback;
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void AssignGestureNotifyEventData(const WidgetGestureNotifyEvent& aEvent,
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bool aCopyTargets)
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{
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AssignGUIEventData(aEvent, aCopyTargets);
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panDirection = aEvent.panDirection;
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displayPanFeedback = aEvent.displayPanFeedback;
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}
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};
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/******************************************************************************
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* mozilla::WidgetTouchEvent
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******************************************************************************/
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class WidgetSimpleGestureEvent : public WidgetMouseEventBase
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{
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public:
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virtual WidgetSimpleGestureEvent* AsSimpleGestureEvent() MOZ_OVERRIDE
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{
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return this;
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}
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WidgetSimpleGestureEvent(bool aIsTrusted, uint32_t aMessage,
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nsIWidget* aWidget)
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: WidgetMouseEventBase(aIsTrusted, aMessage, aWidget,
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NS_SIMPLE_GESTURE_EVENT)
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, allowedDirections(0)
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, direction(0)
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, delta(0.0)
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, clickCount(0)
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{
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}
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WidgetSimpleGestureEvent(const WidgetSimpleGestureEvent& aOther)
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: WidgetMouseEventBase(aOther.mFlags.mIsTrusted, aOther.message,
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aOther.widget, NS_SIMPLE_GESTURE_EVENT)
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, allowedDirections(aOther.allowedDirections)
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, direction(aOther.direction)
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, delta(aOther.delta)
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, clickCount(0)
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{
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}
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virtual WidgetEvent* Duplicate() const MOZ_OVERRIDE
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{
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MOZ_ASSERT(eventStructType == NS_SIMPLE_GESTURE_EVENT,
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"Duplicate() must be overridden by sub class");
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// Not copying widget, it is a weak reference.
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WidgetSimpleGestureEvent* result =
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new WidgetSimpleGestureEvent(false, message, nullptr);
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result->AssignSimpleGestureEventData(*this, true);
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result->mFlags = mFlags;
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return result;
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}
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// See nsIDOMSimpleGestureEvent for values
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uint32_t allowedDirections;
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// See nsIDOMSimpleGestureEvent for values
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uint32_t direction;
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// Delta for magnify and rotate events
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double delta;
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// The number of taps for tap events
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uint32_t clickCount;
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// XXX Not tested by test_assign_event_data.html
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void AssignSimpleGestureEventData(const WidgetSimpleGestureEvent& aEvent,
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bool aCopyTargets)
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{
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AssignMouseEventBaseData(aEvent, aCopyTargets);
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// allowedDirections isn't copied
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direction = aEvent.direction;
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delta = aEvent.delta;
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clickCount = aEvent.clickCount;
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}
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};
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/******************************************************************************
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* mozilla::WidgetTouchEvent
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******************************************************************************/
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class WidgetTouchEvent : public WidgetInputEvent
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{
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public:
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typedef nsTArray<nsRefPtr<mozilla::dom::Touch>> TouchArray;
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typedef nsAutoTArray<nsRefPtr<mozilla::dom::Touch>, 10> AutoTouchArray;
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virtual WidgetTouchEvent* AsTouchEvent() MOZ_OVERRIDE { return this; }
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WidgetTouchEvent()
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{
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}
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WidgetTouchEvent(const WidgetTouchEvent& aOther) :
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WidgetInputEvent(aOther.mFlags.mIsTrusted, aOther.message, aOther.widget,
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NS_TOUCH_EVENT)
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{
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modifiers = aOther.modifiers;
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time = aOther.time;
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timeStamp = aOther.timeStamp;
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touches.AppendElements(aOther.touches);
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mFlags.mCancelable = message != NS_TOUCH_CANCEL;
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MOZ_COUNT_CTOR(WidgetTouchEvent);
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}
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WidgetTouchEvent(bool aIsTrusted, uint32_t aMessage, nsIWidget* aWidget) :
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WidgetInputEvent(aIsTrusted, aMessage, aWidget, NS_TOUCH_EVENT)
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{
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MOZ_COUNT_CTOR(WidgetTouchEvent);
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mFlags.mCancelable = message != NS_TOUCH_CANCEL;
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}
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virtual ~WidgetTouchEvent()
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{
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MOZ_COUNT_DTOR(WidgetTouchEvent);
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}
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virtual WidgetEvent* Duplicate() const MOZ_OVERRIDE
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{
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MOZ_ASSERT(eventStructType == NS_TOUCH_EVENT,
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"Duplicate() must be overridden by sub class");
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// Not copying widget, it is a weak reference.
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WidgetTouchEvent* result = new WidgetTouchEvent(false, message, nullptr);
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result->AssignTouchEventData(*this, true);
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result->mFlags = mFlags;
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return result;
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}
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TouchArray touches;
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void AssignTouchEventData(const WidgetTouchEvent& aEvent, bool aCopyTargets)
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{
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AssignInputEventData(aEvent, aCopyTargets);
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// Assign*EventData() assume that they're called only new instance.
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MOZ_ASSERT(touches.IsEmpty());
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touches.AppendElements(aEvent.touches);
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}
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};
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} // namespace mozilla
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#endif // mozilla_TouchEvents_h__
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