1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/widget/TouchEvents.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,212 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#ifndef mozilla_TouchEvents_h__
1.10 +#define mozilla_TouchEvents_h__
1.11 +
1.12 +#include <stdint.h>
1.13 +
1.14 +#include "mozilla/dom/Touch.h"
1.15 +#include "mozilla/MouseEvents.h"
1.16 +#include "nsAutoPtr.h"
1.17 +#include "nsIDOMSimpleGestureEvent.h"
1.18 +#include "nsTArray.h"
1.19 +
1.20 +namespace mozilla {
1.21 +
1.22 +/******************************************************************************
1.23 + * mozilla::WidgetGestureNotifyEvent
1.24 + *
1.25 + * This event is the first event generated when the user touches
1.26 + * the screen with a finger, and it's meant to decide what kind
1.27 + * of action we'll use for that touch interaction.
1.28 + *
1.29 + * The event is dispatched to the layout and based on what is underneath
1.30 + * the initial contact point it's then decided if we should pan
1.31 + * (finger scrolling) or drag the target element.
1.32 + ******************************************************************************/
1.33 +
1.34 +class WidgetGestureNotifyEvent : public WidgetGUIEvent
1.35 +{
1.36 +public:
1.37 + virtual WidgetGestureNotifyEvent* AsGestureNotifyEvent() MOZ_OVERRIDE
1.38 + {
1.39 + return this;
1.40 + }
1.41 +
1.42 + WidgetGestureNotifyEvent(bool aIsTrusted, uint32_t aMessage,
1.43 + nsIWidget *aWidget) :
1.44 + WidgetGUIEvent(aIsTrusted, aMessage, aWidget, NS_GESTURENOTIFY_EVENT),
1.45 + panDirection(ePanNone), displayPanFeedback(false)
1.46 + {
1.47 + }
1.48 +
1.49 + virtual WidgetEvent* Duplicate() const MOZ_OVERRIDE
1.50 + {
1.51 + // XXX Looks like this event is handled only in PostHandleEvent() of
1.52 + // EventStateManager. Therefore, it might be possible to handle this
1.53 + // in PreHandleEvent() and not to dispatch as a DOM event into the DOM
1.54 + // tree like ContentQueryEvent. Then, this event doesn't need to
1.55 + // support Duplicate().
1.56 + MOZ_ASSERT(eventStructType == NS_GESTURENOTIFY_EVENT,
1.57 + "Duplicate() must be overridden by sub class");
1.58 + // Not copying widget, it is a weak reference.
1.59 + WidgetGestureNotifyEvent* result =
1.60 + new WidgetGestureNotifyEvent(false, message, nullptr);
1.61 + result->AssignGestureNotifyEventData(*this, true);
1.62 + result->mFlags = mFlags;
1.63 + return result;
1.64 + }
1.65 +
1.66 + enum ePanDirection
1.67 + {
1.68 + ePanNone,
1.69 + ePanVertical,
1.70 + ePanHorizontal,
1.71 + ePanBoth
1.72 + };
1.73 +
1.74 + ePanDirection panDirection;
1.75 + bool displayPanFeedback;
1.76 +
1.77 + void AssignGestureNotifyEventData(const WidgetGestureNotifyEvent& aEvent,
1.78 + bool aCopyTargets)
1.79 + {
1.80 + AssignGUIEventData(aEvent, aCopyTargets);
1.81 +
1.82 + panDirection = aEvent.panDirection;
1.83 + displayPanFeedback = aEvent.displayPanFeedback;
1.84 + }
1.85 +};
1.86 +
1.87 +/******************************************************************************
1.88 + * mozilla::WidgetTouchEvent
1.89 + ******************************************************************************/
1.90 +
1.91 +class WidgetSimpleGestureEvent : public WidgetMouseEventBase
1.92 +{
1.93 +public:
1.94 + virtual WidgetSimpleGestureEvent* AsSimpleGestureEvent() MOZ_OVERRIDE
1.95 + {
1.96 + return this;
1.97 + }
1.98 +
1.99 + WidgetSimpleGestureEvent(bool aIsTrusted, uint32_t aMessage,
1.100 + nsIWidget* aWidget)
1.101 + : WidgetMouseEventBase(aIsTrusted, aMessage, aWidget,
1.102 + NS_SIMPLE_GESTURE_EVENT)
1.103 + , allowedDirections(0)
1.104 + , direction(0)
1.105 + , delta(0.0)
1.106 + , clickCount(0)
1.107 + {
1.108 + }
1.109 +
1.110 + WidgetSimpleGestureEvent(const WidgetSimpleGestureEvent& aOther)
1.111 + : WidgetMouseEventBase(aOther.mFlags.mIsTrusted, aOther.message,
1.112 + aOther.widget, NS_SIMPLE_GESTURE_EVENT)
1.113 + , allowedDirections(aOther.allowedDirections)
1.114 + , direction(aOther.direction)
1.115 + , delta(aOther.delta)
1.116 + , clickCount(0)
1.117 + {
1.118 + }
1.119 +
1.120 + virtual WidgetEvent* Duplicate() const MOZ_OVERRIDE
1.121 + {
1.122 + MOZ_ASSERT(eventStructType == NS_SIMPLE_GESTURE_EVENT,
1.123 + "Duplicate() must be overridden by sub class");
1.124 + // Not copying widget, it is a weak reference.
1.125 + WidgetSimpleGestureEvent* result =
1.126 + new WidgetSimpleGestureEvent(false, message, nullptr);
1.127 + result->AssignSimpleGestureEventData(*this, true);
1.128 + result->mFlags = mFlags;
1.129 + return result;
1.130 + }
1.131 +
1.132 + // See nsIDOMSimpleGestureEvent for values
1.133 + uint32_t allowedDirections;
1.134 + // See nsIDOMSimpleGestureEvent for values
1.135 + uint32_t direction;
1.136 + // Delta for magnify and rotate events
1.137 + double delta;
1.138 + // The number of taps for tap events
1.139 + uint32_t clickCount;
1.140 +
1.141 + // XXX Not tested by test_assign_event_data.html
1.142 + void AssignSimpleGestureEventData(const WidgetSimpleGestureEvent& aEvent,
1.143 + bool aCopyTargets)
1.144 + {
1.145 + AssignMouseEventBaseData(aEvent, aCopyTargets);
1.146 +
1.147 + // allowedDirections isn't copied
1.148 + direction = aEvent.direction;
1.149 + delta = aEvent.delta;
1.150 + clickCount = aEvent.clickCount;
1.151 + }
1.152 +};
1.153 +
1.154 +/******************************************************************************
1.155 + * mozilla::WidgetTouchEvent
1.156 + ******************************************************************************/
1.157 +
1.158 +class WidgetTouchEvent : public WidgetInputEvent
1.159 +{
1.160 +public:
1.161 + virtual WidgetTouchEvent* AsTouchEvent() MOZ_OVERRIDE { return this; }
1.162 +
1.163 + WidgetTouchEvent()
1.164 + {
1.165 + }
1.166 +
1.167 + WidgetTouchEvent(const WidgetTouchEvent& aOther) :
1.168 + WidgetInputEvent(aOther.mFlags.mIsTrusted, aOther.message, aOther.widget,
1.169 + NS_TOUCH_EVENT)
1.170 + {
1.171 + modifiers = aOther.modifiers;
1.172 + time = aOther.time;
1.173 + touches.AppendElements(aOther.touches);
1.174 + mFlags.mCancelable = message != NS_TOUCH_CANCEL;
1.175 + MOZ_COUNT_CTOR(WidgetTouchEvent);
1.176 + }
1.177 +
1.178 + WidgetTouchEvent(bool aIsTrusted, uint32_t aMessage, nsIWidget* aWidget) :
1.179 + WidgetInputEvent(aIsTrusted, aMessage, aWidget, NS_TOUCH_EVENT)
1.180 + {
1.181 + MOZ_COUNT_CTOR(WidgetTouchEvent);
1.182 + mFlags.mCancelable = message != NS_TOUCH_CANCEL;
1.183 + }
1.184 +
1.185 + virtual ~WidgetTouchEvent()
1.186 + {
1.187 + MOZ_COUNT_DTOR(WidgetTouchEvent);
1.188 + }
1.189 +
1.190 + virtual WidgetEvent* Duplicate() const MOZ_OVERRIDE
1.191 + {
1.192 + MOZ_ASSERT(eventStructType == NS_TOUCH_EVENT,
1.193 + "Duplicate() must be overridden by sub class");
1.194 + // Not copying widget, it is a weak reference.
1.195 + WidgetTouchEvent* result = new WidgetTouchEvent(false, message, nullptr);
1.196 + result->AssignTouchEventData(*this, true);
1.197 + result->mFlags = mFlags;
1.198 + return result;
1.199 + }
1.200 +
1.201 + nsTArray<nsRefPtr<mozilla::dom::Touch>> touches;
1.202 +
1.203 + void AssignTouchEventData(const WidgetTouchEvent& aEvent, bool aCopyTargets)
1.204 + {
1.205 + AssignInputEventData(aEvent, aCopyTargets);
1.206 +
1.207 + // Assign*EventData() assume that they're called only new instance.
1.208 + MOZ_ASSERT(touches.IsEmpty());
1.209 + touches.AppendElements(aEvent.touches);
1.210 + }
1.211 +};
1.212 +
1.213 +} // namespace mozilla
1.214 +
1.215 +#endif // mozilla_TouchEvents_h__
