зеркало из https://github.com/mozilla/gecko-dev.git
392 строки
11 KiB
C++
392 строки
11 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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#include "mozilla/BasicEvents.h"
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#include "mozilla/ContentEvents.h"
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#include "mozilla/InternalMutationEvent.h"
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#include "mozilla/MiscEvents.h"
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#include "mozilla/MouseEvents.h"
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#include "mozilla/Preferences.h"
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#include "mozilla/TextEvents.h"
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#include "mozilla/TouchEvents.h"
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namespace mozilla {
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/******************************************************************************
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* As*Event() implementation
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******************************************************************************/
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#define NS_ROOT_EVENT_CLASS(aPrefix, aName)
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#define NS_EVENT_CLASS(aPrefix, aName) \
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aPrefix##aName* \
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WidgetEvent::As##aName() \
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{ \
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return nullptr; \
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} \
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\
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const aPrefix##aName* \
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WidgetEvent::As##aName() const \
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{ \
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return const_cast<WidgetEvent*>(this)->As##aName(); \
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}
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#include "mozilla/EventClassList.h"
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#undef NS_EVENT_CLASS
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#undef NS_ROOT_EVENT_CLASS
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/******************************************************************************
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* mozilla::WidgetEvent
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*
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* Event struct type checking methods.
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******************************************************************************/
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bool
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WidgetEvent::IsQueryContentEvent() const
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{
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return mClass == eQueryContentEventClass;
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}
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bool
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WidgetEvent::IsSelectionEvent() const
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{
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return mClass == eSelectionEventClass;
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}
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bool
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WidgetEvent::IsContentCommandEvent() const
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{
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return mClass == eContentCommandEventClass;
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}
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bool
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WidgetEvent::IsNativeEventDelivererForPlugin() const
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{
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return mClass == ePluginEventClass;
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}
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/******************************************************************************
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* mozilla::WidgetEvent
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*
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* Event message checking methods.
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******************************************************************************/
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bool
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WidgetEvent::HasMouseEventMessage() const
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{
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switch (message) {
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case NS_MOUSE_BUTTON_DOWN:
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case NS_MOUSE_BUTTON_UP:
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case NS_MOUSE_CLICK:
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case NS_MOUSE_DOUBLECLICK:
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case NS_MOUSE_ENTER:
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case NS_MOUSE_EXIT:
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case NS_MOUSE_ACTIVATE:
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case NS_MOUSE_ENTER_SYNTH:
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case NS_MOUSE_EXIT_SYNTH:
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case NS_MOUSE_MOZHITTEST:
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case NS_MOUSE_MOVE:
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return true;
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default:
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return false;
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}
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}
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bool
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WidgetEvent::HasDragEventMessage() const
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{
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switch (message) {
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case NS_DRAGDROP_ENTER:
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case NS_DRAGDROP_OVER:
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case NS_DRAGDROP_EXIT:
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case NS_DRAGDROP_DRAGDROP:
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case NS_DRAGDROP_GESTURE:
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case NS_DRAGDROP_DRAG:
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case NS_DRAGDROP_END:
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case NS_DRAGDROP_START:
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case NS_DRAGDROP_DROP:
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case NS_DRAGDROP_LEAVE_SYNTH:
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return true;
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default:
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return false;
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}
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}
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bool
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WidgetEvent::HasKeyEventMessage() const
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{
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switch (message) {
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case NS_KEY_DOWN:
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case NS_KEY_PRESS:
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case NS_KEY_UP:
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return true;
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default:
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return false;
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}
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}
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bool
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WidgetEvent::HasIMEEventMessage() const
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{
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switch (message) {
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case NS_TEXT_TEXT:
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case NS_COMPOSITION_START:
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case NS_COMPOSITION_END:
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case NS_COMPOSITION_UPDATE:
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return true;
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default:
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return false;
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}
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}
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bool
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WidgetEvent::HasPluginActivationEventMessage() const
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{
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return message == NS_PLUGIN_ACTIVATE ||
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message == NS_PLUGIN_FOCUS;
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}
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/******************************************************************************
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* mozilla::WidgetEvent
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*
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* Specific event checking methods.
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******************************************************************************/
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bool
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WidgetEvent::IsRetargetedNativeEventDelivererForPlugin() const
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{
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const WidgetPluginEvent* pluginEvent = AsPluginEvent();
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return pluginEvent && pluginEvent->retargetToFocusedDocument;
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}
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bool
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WidgetEvent::IsNonRetargetedNativeEventDelivererForPlugin() const
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{
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const WidgetPluginEvent* pluginEvent = AsPluginEvent();
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return pluginEvent && !pluginEvent->retargetToFocusedDocument;
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}
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bool
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WidgetEvent::IsIMERelatedEvent() const
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{
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return HasIMEEventMessage() || IsQueryContentEvent() || IsSelectionEvent();
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}
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bool
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WidgetEvent::IsUsingCoordinates() const
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{
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const WidgetMouseEvent* mouseEvent = AsMouseEvent();
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if (mouseEvent) {
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return !mouseEvent->IsContextMenuKeyEvent();
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}
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return !HasKeyEventMessage() && !IsIMERelatedEvent() &&
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!HasPluginActivationEventMessage() &&
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!IsNativeEventDelivererForPlugin() &&
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!IsContentCommandEvent() &&
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message != NS_PLUGIN_RESOLUTION_CHANGED;
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}
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bool
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WidgetEvent::IsTargetedAtFocusedWindow() const
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{
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const WidgetMouseEvent* mouseEvent = AsMouseEvent();
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if (mouseEvent) {
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return mouseEvent->IsContextMenuKeyEvent();
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}
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return HasKeyEventMessage() || IsIMERelatedEvent() ||
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IsContentCommandEvent() ||
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IsRetargetedNativeEventDelivererForPlugin();
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}
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bool
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WidgetEvent::IsTargetedAtFocusedContent() const
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{
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const WidgetMouseEvent* mouseEvent = AsMouseEvent();
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if (mouseEvent) {
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return mouseEvent->IsContextMenuKeyEvent();
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}
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return HasKeyEventMessage() || IsIMERelatedEvent() ||
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IsRetargetedNativeEventDelivererForPlugin();
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}
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bool
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WidgetEvent::IsAllowedToDispatchDOMEvent() const
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{
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switch (mClass) {
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case eMouseEventClass:
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case ePointerEventClass:
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// We want synthesized mouse moves to cause mouseover and mouseout
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// DOM events (EventStateManager::PreHandleEvent), but not mousemove
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// DOM events.
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// Synthesized button up events also do not cause DOM events because they
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// do not have a reliable refPoint.
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return AsMouseEvent()->reason == WidgetMouseEvent::eReal;
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case eWheelEventClass: {
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// wheel event whose all delta values are zero by user pref applied, it
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// shouldn't cause a DOM event.
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const WidgetWheelEvent* wheelEvent = AsWheelEvent();
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return wheelEvent->deltaX != 0.0 || wheelEvent->deltaY != 0.0 ||
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wheelEvent->deltaZ != 0.0;
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}
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// Following events are handled in EventStateManager, so, we don't need to
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// dispatch DOM event for them into the DOM tree.
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case eQueryContentEventClass:
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case eSelectionEventClass:
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case eContentCommandEventClass:
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return false;
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default:
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return true;
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}
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}
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/******************************************************************************
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* mozilla::WidgetInputEvent
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******************************************************************************/
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/* static */
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Modifier
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WidgetInputEvent::AccelModifier()
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{
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static Modifier sAccelModifier = MODIFIER_NONE;
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if (sAccelModifier == MODIFIER_NONE) {
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switch (Preferences::GetInt("ui.key.accelKey", 0)) {
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case nsIDOMKeyEvent::DOM_VK_META:
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sAccelModifier = MODIFIER_META;
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break;
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case nsIDOMKeyEvent::DOM_VK_WIN:
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sAccelModifier = MODIFIER_OS;
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break;
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case nsIDOMKeyEvent::DOM_VK_ALT:
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sAccelModifier = MODIFIER_ALT;
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break;
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case nsIDOMKeyEvent::DOM_VK_CONTROL:
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sAccelModifier = MODIFIER_CONTROL;
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break;
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default:
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#ifdef XP_MACOSX
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sAccelModifier = MODIFIER_META;
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#else
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sAccelModifier = MODIFIER_CONTROL;
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#endif
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break;
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}
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}
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return sAccelModifier;
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}
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/******************************************************************************
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* mozilla::WidgetKeyboardEvent (TextEvents.h)
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******************************************************************************/
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/*static*/ void
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WidgetKeyboardEvent::GetDOMKeyName(KeyNameIndex aKeyNameIndex,
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nsAString& aKeyName)
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{
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// The expected way to implement this function would be to use a
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// switch statement. By using a table-based implementation, below, we
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// ensure that this function executes in constant time in cases where
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// compilers wouldn't be able to convert the switch statement to a
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// jump table. This table-based implementation also minimizes the
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// space required by the code and data.
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#define KEY_STR_NUM_INTERNAL(line) key##line
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#define KEY_STR_NUM(line) KEY_STR_NUM_INTERNAL(line)
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// Catch non-ASCII DOM key names in our key name list.
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#define NS_DEFINE_KEYNAME(aCPPName, aDOMKeyName) \
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static_assert(sizeof(aDOMKeyName) == MOZ_ARRAY_LENGTH(aDOMKeyName), \
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"Invalid DOM key name");
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#include "mozilla/KeyNameList.h"
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#undef NS_DEFINE_KEYNAME
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struct KeyNameTable
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{
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#define NS_DEFINE_KEYNAME(aCPPName, aDOMKeyName) \
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char16_t KEY_STR_NUM(__LINE__)[sizeof(aDOMKeyName)];
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#include "mozilla/KeyNameList.h"
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#undef NS_DEFINE_KEYNAME
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};
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static const KeyNameTable kKeyNameTable = {
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#define NS_DEFINE_KEYNAME(aCPPName, aDOMKeyName) MOZ_UTF16(aDOMKeyName),
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#include "mozilla/KeyNameList.h"
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#undef NS_DEFINE_KEYNAME
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};
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static const uint16_t kKeyNameOffsets[] = {
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#define NS_DEFINE_KEYNAME(aCPPName, aDOMKeyName) \
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offsetof(struct KeyNameTable, KEY_STR_NUM(__LINE__)) / sizeof(char16_t),
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#include "mozilla/KeyNameList.h"
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#undef NS_DEFINE_KEYNAME
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// Include this entry so we can compute lengths easily.
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sizeof(kKeyNameTable)
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};
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// Use the sizeof trick rather than MOZ_ARRAY_LENGTH to avoid problems
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// with constexpr functions called inside static_assert with some
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// compilers.
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static_assert(KEY_NAME_INDEX_USE_STRING ==
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(sizeof(kKeyNameOffsets)/sizeof(kKeyNameOffsets[0])) - 1,
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"Invalid enumeration values!");
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if (aKeyNameIndex >= KEY_NAME_INDEX_USE_STRING) {
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aKeyName.Truncate();
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return;
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}
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uint16_t offset = kKeyNameOffsets[aKeyNameIndex];
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uint16_t nextOffset = kKeyNameOffsets[aKeyNameIndex + 1];
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const char16_t* table = reinterpret_cast<const char16_t*>(&kKeyNameTable);
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// Subtract off 1 for the null terminator.
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aKeyName.Assign(table + offset, nextOffset - offset - 1);
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#undef KEY_STR_NUM
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#undef KEY_STR_NUM_INTERNAL
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}
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/*static*/ void
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WidgetKeyboardEvent::GetDOMCodeName(CodeNameIndex aCodeNameIndex,
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nsAString& aCodeName)
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{
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if (aCodeNameIndex >= CODE_NAME_INDEX_USE_STRING) {
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aCodeName.Truncate();
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return;
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}
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#define NS_DEFINE_PHYSICAL_KEY_CODE_NAME(aCPPName, aDOMCodeName) \
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MOZ_UTF16(aDOMCodeName),
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static const char16_t* kCodeNames[] = {
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#include "mozilla/PhysicalKeyCodeNameList.h"
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MOZ_UTF16("")
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};
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#undef NS_DEFINE_PHYSICAL_KEY_CODE_NAME
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MOZ_RELEASE_ASSERT(static_cast<size_t>(aCodeNameIndex) <
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ArrayLength(kCodeNames),
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"Illegal physical code enumeration value");
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aCodeName = kCodeNames[aCodeNameIndex];
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}
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/* static */ const char*
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WidgetKeyboardEvent::GetCommandStr(Command aCommand)
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{
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#define NS_DEFINE_COMMAND(aName, aCommandStr) , #aCommandStr
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static const char* kCommands[] = {
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"" // CommandDoNothing
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#include "mozilla/CommandList.h"
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};
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#undef NS_DEFINE_COMMAND
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MOZ_RELEASE_ASSERT(static_cast<size_t>(aCommand) < ArrayLength(kCommands),
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"Illegal command enumeration value");
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return kCommands[aCommand];
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}
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} // namespace mozilla
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