зеркало из https://github.com/mozilla/gecko-dev.git
618 строки
18 KiB
C++
618 строки
18 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_MouseEvents_h__
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#define mozilla_MouseEvents_h__
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#include <stdint.h>
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#include "mozilla/BasicEvents.h"
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#include "mozilla/MathAlgorithms.h"
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#include "mozilla/dom/DataTransfer.h"
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#include "nsCOMPtr.h"
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#include "nsIDOMMouseEvent.h"
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#include "nsIDOMWheelEvent.h"
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/******************************************************************************
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* nsDragDropEventStatus
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******************************************************************************/
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enum nsDragDropEventStatus
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{
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// The event is a enter
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nsDragDropEventStatus_eDragEntered,
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// The event is exit
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nsDragDropEventStatus_eDragExited,
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// The event is drop
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nsDragDropEventStatus_eDrop
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};
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namespace mozilla {
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namespace dom {
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class PBrowserParent;
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class PBrowserChild;
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} // namespace dom
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/******************************************************************************
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* mozilla::WidgetPointerHelper
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******************************************************************************/
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class WidgetPointerHelper
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{
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public:
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bool convertToPointer;
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uint32_t tiltX;
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uint32_t tiltY;
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WidgetPointerHelper() : convertToPointer(true), tiltX(0), tiltY(0) {}
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void AssignPointerHelperData(const WidgetPointerHelper& aEvent)
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{
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convertToPointer = aEvent.convertToPointer;
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tiltX = aEvent.tiltX;
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tiltY = aEvent.tiltY;
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}
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};
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/******************************************************************************
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* mozilla::WidgetMouseEventBase
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******************************************************************************/
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class WidgetMouseEventBase : public WidgetInputEvent
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{
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private:
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friend class dom::PBrowserParent;
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friend class dom::PBrowserChild;
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protected:
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WidgetMouseEventBase()
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{
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}
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WidgetMouseEventBase(bool aIsTrusted, uint32_t aMessage, nsIWidget* aWidget,
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nsEventStructType aStructType) :
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WidgetInputEvent(aIsTrusted, aMessage, aWidget, aStructType),
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button(0), buttons(0), pressure(0),
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inputSource(nsIDOMMouseEvent::MOZ_SOURCE_MOUSE)
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{
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}
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public:
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virtual WidgetMouseEventBase* AsMouseEventBase() MOZ_OVERRIDE { return this; }
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virtual WidgetEvent* Duplicate() const MOZ_OVERRIDE
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{
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MOZ_CRASH("WidgetMouseEventBase must not be most-subclass");
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return nullptr;
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}
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/// The possible related target
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nsCOMPtr<nsISupports> relatedTarget;
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enum buttonType
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{
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eLeftButton = 0,
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eMiddleButton = 1,
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eRightButton = 2
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};
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// Pressed button ID of mousedown or mouseup event.
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// This is set only when pressing a button causes the event.
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int16_t button;
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enum buttonsFlag {
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eLeftButtonFlag = 0x01,
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eRightButtonFlag = 0x02,
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eMiddleButtonFlag = 0x04,
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// typicall, "back" button being left side of 5-button
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// mice, see "buttons" attribute document of DOM3 Events.
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e4thButtonFlag = 0x08,
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// typicall, "forward" button being right side of 5-button
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// mice, see "buttons" attribute document of DOM3 Events.
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e5thButtonFlag = 0x10
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};
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// Flags of all pressed buttons at the event fired.
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// This is set at any mouse event, don't be confused with |button|.
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int16_t buttons;
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// Finger or touch pressure of event. It ranges between 0.0 and 1.0.
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float pressure;
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// Possible values at nsIDOMMouseEvent
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uint16_t inputSource;
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void AssignMouseEventBaseData(const WidgetMouseEventBase& aEvent,
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bool aCopyTargets)
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{
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AssignInputEventData(aEvent, aCopyTargets);
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relatedTarget = aCopyTargets ? aEvent.relatedTarget : nullptr;
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button = aEvent.button;
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buttons = aEvent.buttons;
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pressure = aEvent.pressure;
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inputSource = aEvent.inputSource;
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}
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/**
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* Returns true if left click event.
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*/
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bool IsLeftClickEvent() const
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{
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return message == NS_MOUSE_CLICK && button == eLeftButton;
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}
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};
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/******************************************************************************
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* mozilla::WidgetMouseEvent
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******************************************************************************/
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class WidgetMouseEvent : public WidgetMouseEventBase, public WidgetPointerHelper
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{
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private:
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friend class mozilla::dom::PBrowserParent;
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friend class mozilla::dom::PBrowserChild;
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public:
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enum reasonType
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{
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eReal,
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eSynthesized
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};
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enum contextType
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{
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eNormal,
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eContextMenuKey
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};
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enum exitType
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{
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eChild,
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eTopLevel
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};
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protected:
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WidgetMouseEvent()
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{
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}
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WidgetMouseEvent(bool aIsTrusted, uint32_t aMessage, nsIWidget* aWidget,
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nsEventStructType aStructType, reasonType aReason) :
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WidgetMouseEventBase(aIsTrusted, aMessage, aWidget, aStructType),
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acceptActivation(false), ignoreRootScrollFrame(false),
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reason(aReason), context(eNormal), exit(eChild), clickCount(0)
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{
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switch (aMessage) {
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case NS_MOUSE_MOVE:
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mFlags.mCancelable = false;
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break;
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case NS_MOUSEENTER:
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case NS_MOUSELEAVE:
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mFlags.mBubbles = false;
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mFlags.mCancelable = false;
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break;
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default:
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break;
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}
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}
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public:
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virtual WidgetMouseEvent* AsMouseEvent() MOZ_OVERRIDE { return this; }
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WidgetMouseEvent(bool aIsTrusted, uint32_t aMessage, nsIWidget* aWidget,
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reasonType aReason, contextType aContext = eNormal) :
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WidgetMouseEventBase(aIsTrusted, aMessage, aWidget, NS_MOUSE_EVENT),
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acceptActivation(false), ignoreRootScrollFrame(false),
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reason(aReason), context(aContext), exit(eChild), clickCount(0)
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{
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switch (aMessage) {
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case NS_MOUSE_MOVE:
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mFlags.mCancelable = false;
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break;
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case NS_MOUSEENTER:
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case NS_MOUSELEAVE:
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mFlags.mBubbles = false;
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mFlags.mCancelable = false;
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break;
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case NS_CONTEXTMENU:
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button = (context == eNormal) ? eRightButton : eLeftButton;
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break;
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default:
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break;
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}
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}
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#ifdef DEBUG
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virtual ~WidgetMouseEvent()
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{
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NS_WARN_IF_FALSE(message != NS_CONTEXTMENU ||
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button ==
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((context == eNormal) ? eRightButton : eLeftButton),
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"Wrong button set to NS_CONTEXTMENU event?");
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}
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#endif
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virtual WidgetEvent* Duplicate() const MOZ_OVERRIDE
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{
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MOZ_ASSERT(eventStructType == NS_MOUSE_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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WidgetMouseEvent* result =
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new WidgetMouseEvent(false, message, nullptr, reason, context);
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result->AssignMouseEventData(*this, true);
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result->mFlags = mFlags;
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return result;
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}
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// Special return code for MOUSE_ACTIVATE to signal.
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// If the target accepts activation (1), or denies it (0).
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bool acceptActivation;
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// Whether the event should ignore scroll frame bounds during dispatch.
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bool ignoreRootScrollFrame;
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reasonType reason : 4;
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contextType context : 4;
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exitType exit;
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/// The number of mouse clicks.
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uint32_t clickCount;
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void AssignMouseEventData(const WidgetMouseEvent& aEvent, bool aCopyTargets)
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{
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AssignMouseEventBaseData(aEvent, aCopyTargets);
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AssignPointerHelperData(aEvent);
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acceptActivation = aEvent.acceptActivation;
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ignoreRootScrollFrame = aEvent.ignoreRootScrollFrame;
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clickCount = aEvent.clickCount;
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}
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/**
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* Returns true if the event is a context menu event caused by key.
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*/
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bool IsContextMenuKeyEvent() const
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{
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return message == NS_CONTEXTMENU && context == eContextMenuKey;
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}
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};
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/******************************************************************************
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* mozilla::WidgetDragEvent
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******************************************************************************/
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class WidgetDragEvent : public WidgetMouseEvent
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{
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public:
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virtual WidgetDragEvent* AsDragEvent() MOZ_OVERRIDE { return this; }
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WidgetDragEvent(bool aIsTrusted, uint32_t aMessage, nsIWidget* aWidget) :
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WidgetMouseEvent(aIsTrusted, aMessage, aWidget, NS_DRAG_EVENT, eReal),
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userCancelled(false), mDefaultPreventedOnContent(false)
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{
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mFlags.mCancelable =
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(aMessage != NS_DRAGDROP_EXIT_SYNTH &&
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aMessage != NS_DRAGDROP_LEAVE_SYNTH &&
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aMessage != NS_DRAGDROP_END);
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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_DRAG_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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WidgetDragEvent* result = new WidgetDragEvent(false, message, nullptr);
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result->AssignDragEventData(*this, true);
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result->mFlags = mFlags;
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return result;
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}
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// The dragging data.
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nsCOMPtr<dom::DataTransfer> dataTransfer;
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// If this is true, user has cancelled the drag operation.
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bool userCancelled;
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// If this is true, the drag event's preventDefault() is called on content.
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bool mDefaultPreventedOnContent;
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// XXX Not tested by test_assign_event_data.html
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void AssignDragEventData(const WidgetDragEvent& aEvent, bool aCopyTargets)
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{
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AssignMouseEventData(aEvent, aCopyTargets);
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dataTransfer = aEvent.dataTransfer;
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// XXX userCancelled isn't copied, is this instentionally?
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userCancelled = false;
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mDefaultPreventedOnContent = aEvent.mDefaultPreventedOnContent;
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}
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};
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/******************************************************************************
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* mozilla::WidgetMouseScrollEvent
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*
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* This is used for legacy DOM mouse scroll events, i.e.,
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* DOMMouseScroll and MozMousePixelScroll event. These events are NOT hanbled
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* by ESM even if widget dispatches them. Use new WidgetWheelEvent instead.
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******************************************************************************/
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class WidgetMouseScrollEvent : public WidgetMouseEventBase
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{
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private:
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WidgetMouseScrollEvent()
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{
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}
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public:
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virtual WidgetMouseScrollEvent* AsMouseScrollEvent() MOZ_OVERRIDE
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{
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return this;
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}
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WidgetMouseScrollEvent(bool aIsTrusted, uint32_t aMessage,
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nsIWidget* aWidget) :
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WidgetMouseEventBase(aIsTrusted, aMessage, aWidget, NS_MOUSE_SCROLL_EVENT),
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delta(0), isHorizontal(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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MOZ_ASSERT(eventStructType == NS_MOUSE_SCROLL_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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WidgetMouseScrollEvent* result =
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new WidgetMouseScrollEvent(false, message, nullptr);
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result->AssignMouseScrollEventData(*this, true);
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result->mFlags = mFlags;
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return result;
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}
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// The delta value of mouse scroll event.
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// If the event message is NS_MOUSE_SCROLL, the value indicates scroll amount
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// in lines. However, if the value is nsIDOMUIEvent::SCROLL_PAGE_UP or
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// nsIDOMUIEvent::SCROLL_PAGE_DOWN, the value inducates one page scroll.
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// If the event message is NS_MOUSE_PIXEL_SCROLL, the value indicates scroll
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// amount in pixels.
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int32_t delta;
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// If this is true, it may cause to scroll horizontally.
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// Otherwise, vertically.
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bool isHorizontal;
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void AssignMouseScrollEventData(const WidgetMouseScrollEvent& aEvent,
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bool aCopyTargets)
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{
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AssignMouseEventBaseData(aEvent, aCopyTargets);
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delta = aEvent.delta;
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isHorizontal = aEvent.isHorizontal;
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}
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};
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/******************************************************************************
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* mozilla::WidgetWheelEvent
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******************************************************************************/
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class WidgetWheelEvent : public WidgetMouseEventBase
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{
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private:
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friend class mozilla::dom::PBrowserParent;
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friend class mozilla::dom::PBrowserChild;
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WidgetWheelEvent()
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{
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}
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public:
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virtual WidgetWheelEvent* AsWheelEvent() MOZ_OVERRIDE { return this; }
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WidgetWheelEvent(bool aIsTrusted, uint32_t aMessage, nsIWidget* aWidget) :
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WidgetMouseEventBase(aIsTrusted, aMessage, aWidget, NS_WHEEL_EVENT),
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deltaX(0.0), deltaY(0.0), deltaZ(0.0),
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deltaMode(nsIDOMWheelEvent::DOM_DELTA_PIXEL),
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customizedByUserPrefs(false), isMomentum(false), isPixelOnlyDevice(false),
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lineOrPageDeltaX(0), lineOrPageDeltaY(0), scrollType(SCROLL_DEFAULT),
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overflowDeltaX(0.0), overflowDeltaY(0.0),
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mViewPortIsOverscrolled(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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MOZ_ASSERT(eventStructType == NS_WHEEL_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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WidgetWheelEvent* result = new WidgetWheelEvent(false, message, nullptr);
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result->AssignWheelEventData(*this, true);
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result->mFlags = mFlags;
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return result;
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}
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// NOTE: deltaX, deltaY and deltaZ may be customized by
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// mousewheel.*.delta_multiplier_* prefs which are applied by
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// nsEventStateManager. So, after widget dispatches this event,
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// these delta values may have different values than before.
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double deltaX;
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double deltaY;
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double deltaZ;
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// Should be one of nsIDOMWheelEvent::DOM_DELTA_*
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uint32_t deltaMode;
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// Following members are for internal use only, not for DOM event.
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// If the delta values are computed from prefs, this value is true.
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// Otherwise, i.e., they are computed from native events, false.
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bool customizedByUserPrefs;
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// true if the event is caused by momentum.
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bool isMomentum;
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// If device event handlers don't know when they should set lineOrPageDeltaX
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// and lineOrPageDeltaY, this is true. Otherwise, false.
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// If isPixelOnlyDevice is true, ESM will generate NS_MOUSE_SCROLL events
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// when accumulated pixel delta values reach a line height.
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bool isPixelOnlyDevice;
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// If widget sets lineOrPageDelta, nsEventStateManager will dispatch
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// NS_MOUSE_SCROLL event for compatibility. Note that the delta value means
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// pages if the deltaMode is DOM_DELTA_PAGE, otherwise, lines.
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int32_t lineOrPageDeltaX;
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int32_t lineOrPageDeltaY;
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// When the default action for an wheel event is moving history or zooming,
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// need to chose a delta value for doing it.
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int32_t GetPreferredIntDelta()
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{
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if (!lineOrPageDeltaX && !lineOrPageDeltaY) {
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return 0;
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}
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if (lineOrPageDeltaY && !lineOrPageDeltaX) {
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return lineOrPageDeltaY;
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}
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if (lineOrPageDeltaX && !lineOrPageDeltaY) {
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return lineOrPageDeltaX;
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}
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if ((lineOrPageDeltaX < 0 && lineOrPageDeltaY > 0) ||
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(lineOrPageDeltaX > 0 && lineOrPageDeltaY < 0)) {
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return 0; // We cannot guess the answer in this case.
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}
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return (Abs(lineOrPageDeltaX) > Abs(lineOrPageDeltaY)) ?
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lineOrPageDeltaX : lineOrPageDeltaY;
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}
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// Scroll type
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// The default value is SCROLL_DEFAULT, which means nsEventStateManager will
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// select preferred scroll type automatically.
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enum ScrollType
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{
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SCROLL_DEFAULT,
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SCROLL_SYNCHRONOUSLY,
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SCROLL_ASYNCHRONOUSELY,
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SCROLL_SMOOTHLY
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};
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ScrollType scrollType;
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// overflowed delta values for scroll, these values are set by
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// nsEventStateManger. If the default action of the wheel event isn't scroll,
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// these values always zero. Otherwise, remaning delta values which are
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// not used by scroll are set.
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// NOTE: deltaX, deltaY and deltaZ may be modified by nsEventStateManager.
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// However, overflowDeltaX and overflowDeltaY indicate unused original
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// delta values which are not applied the delta_multiplier prefs.
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// So, if widget wanted to know the actual direction to be scrolled,
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// it would need to check the deltaX and deltaY.
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double overflowDeltaX;
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double overflowDeltaY;
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// Whether or not the parent of the currently overscrolled frame is the
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// ViewPort. This is false in situations when an element on the page is being
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// overscrolled (such as a text field), but true when the 'page' is being
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// overscrolled.
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bool mViewPortIsOverscrolled;
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void AssignWheelEventData(const WidgetWheelEvent& aEvent, bool aCopyTargets)
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{
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AssignMouseEventBaseData(aEvent, aCopyTargets);
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deltaX = aEvent.deltaX;
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deltaY = aEvent.deltaY;
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deltaZ = aEvent.deltaZ;
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deltaMode = aEvent.deltaMode;
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customizedByUserPrefs = aEvent.customizedByUserPrefs;
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isMomentum = aEvent.isMomentum;
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isPixelOnlyDevice = aEvent.isPixelOnlyDevice;
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lineOrPageDeltaX = aEvent.lineOrPageDeltaX;
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lineOrPageDeltaY = aEvent.lineOrPageDeltaY;
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scrollType = aEvent.scrollType;
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overflowDeltaX = aEvent.overflowDeltaX;
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overflowDeltaY = aEvent.overflowDeltaY;
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mViewPortIsOverscrolled = aEvent.mViewPortIsOverscrolled;
|
|
}
|
|
};
|
|
|
|
/******************************************************************************
|
|
* mozilla::WidgetPointerEvent
|
|
******************************************************************************/
|
|
|
|
class WidgetPointerEvent : public WidgetMouseEvent
|
|
{
|
|
friend class mozilla::dom::PBrowserParent;
|
|
friend class mozilla::dom::PBrowserChild;
|
|
|
|
WidgetPointerEvent()
|
|
{
|
|
}
|
|
|
|
public:
|
|
virtual WidgetPointerEvent* AsPointerEvent() MOZ_OVERRIDE { return this; }
|
|
|
|
WidgetPointerEvent(bool aIsTrusted, uint32_t aMsg, nsIWidget* w)
|
|
: WidgetMouseEvent(aIsTrusted, aMsg, w, NS_POINTER_EVENT, eReal)
|
|
, pointerId(0)
|
|
, width(0)
|
|
, height(0)
|
|
, isPrimary(true)
|
|
{
|
|
UpdateFlags();
|
|
}
|
|
|
|
WidgetPointerEvent(const WidgetMouseEvent& aEvent)
|
|
: WidgetMouseEvent(aEvent)
|
|
, pointerId(0)
|
|
, width(0)
|
|
, height(0)
|
|
, isPrimary(true)
|
|
{
|
|
eventStructType = NS_POINTER_EVENT;
|
|
UpdateFlags();
|
|
}
|
|
|
|
void UpdateFlags()
|
|
{
|
|
switch (message) {
|
|
case NS_POINTER_ENTER:
|
|
case NS_POINTER_LEAVE:
|
|
mFlags.mBubbles = false;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
virtual WidgetEvent* Duplicate() const MOZ_OVERRIDE
|
|
{
|
|
MOZ_ASSERT(eventStructType == NS_POINTER_EVENT,
|
|
"Duplicate() must be overridden by sub class");
|
|
// Not copying widget, it is a weak reference.
|
|
WidgetPointerEvent* result =
|
|
new WidgetPointerEvent(false, message, nullptr);
|
|
result->AssignPointerEventData(*this, true);
|
|
result->mFlags = mFlags;
|
|
return result;
|
|
}
|
|
|
|
uint32_t pointerId;
|
|
uint32_t width;
|
|
uint32_t height;
|
|
bool isPrimary;
|
|
|
|
// XXX Not tested by test_assign_event_data.html
|
|
void AssignPointerEventData(const WidgetPointerEvent& aEvent,
|
|
bool aCopyTargets)
|
|
{
|
|
AssignMouseEventData(aEvent, aCopyTargets);
|
|
|
|
pointerId = aEvent.pointerId;
|
|
width = aEvent.width;
|
|
height = aEvent.height;
|
|
isPrimary = aEvent.isPrimary;
|
|
}
|
|
};
|
|
|
|
} // namespace mozilla
|
|
|
|
#endif // mozilla_MouseEvents_h__
|