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WidgetEventImpl.cpp
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "gfxPrefs.h"
#include "mozilla/BasicEvents.h"
#include "mozilla/ContentEvents.h"
#include "mozilla/EventStateManager.h"
#include "mozilla/InternalMutationEvent.h"
#include "mozilla/MiscEvents.h"
#include "mozilla/MouseEvents.h"
#include "mozilla/Preferences.h"
#include "mozilla/TextEvents.h"
#include "mozilla/TouchEvents.h"
#include "mozilla/dom/KeyboardEventBinding.h"
#include "nsContentUtils.h"
#include "nsIContent.h"
#include "nsPrintfCString.h"
namespace mozilla {
/******************************************************************************
* Global helper methods
******************************************************************************/
const char*
ToChar(EventMessage aEventMessage)
{
switch (aEventMessage) {
#define NS_EVENT_MESSAGE(aMessage) \
case aMessage: \
return #aMessage;
#include "mozilla/EventMessageList.h"
#undef NS_EVENT_MESSAGE
default:
return "illegal event message";
}
}
const char*
ToChar(EventClassID aEventClassID)
{
switch (aEventClassID) {
#define NS_ROOT_EVENT_CLASS(aPrefix, aName) \
case eBasic##aName##Class: \
return "eBasic" #aName "Class";
#define NS_EVENT_CLASS(aPrefix, aName) \
case e##aName##Class: \
return "e" #aName "Class";
#include "mozilla/EventClassList.h"
#undef NS_EVENT_CLASS
#undef NS_ROOT_EVENT_CLASS
default:
return "illegal event class ID";
}
}
const nsCString
ToString(KeyNameIndex aKeyNameIndex)
{
if (aKeyNameIndex == KEY_NAME_INDEX_USE_STRING) {
return NS_LITERAL_CSTRING("USE_STRING");
}
nsAutoString keyName;
WidgetKeyboardEvent::GetDOMKeyName(aKeyNameIndex, keyName);
return NS_ConvertUTF16toUTF8(keyName);
}
const nsCString
ToString(CodeNameIndex aCodeNameIndex)
{
if (aCodeNameIndex == CODE_NAME_INDEX_USE_STRING) {
return NS_LITERAL_CSTRING("USE_STRING");
}
nsAutoString codeName;
WidgetKeyboardEvent::GetDOMCodeName(aCodeNameIndex, codeName);
return NS_ConvertUTF16toUTF8(codeName);
}
const char*
ToChar(Command aCommand)
{
if (aCommand == CommandDoNothing) {
return "CommandDoNothing";
}
switch (aCommand) {
#define NS_DEFINE_COMMAND(aName, aCommandStr) \
case Command##aName: \
return "Command" #aName;
#define NS_DEFINE_COMMAND_NO_EXEC_COMMAND(aName) \
case Command##aName: \
return "Command" #aName;
#include "mozilla/CommandList.h"
#undef NS_DEFINE_COMMAND
#undef NS_DEFINE_COMMAND_NO_EXEC_COMMAND
default:
return "illegal command value";
}
}
const nsCString
GetDOMKeyCodeName(uint32_t aKeyCode)
{
switch (aKeyCode) {
#define NS_DISALLOW_SAME_KEYCODE
#define NS_DEFINE_VK(aDOMKeyName, aDOMKeyCode) \
case aDOMKeyCode: \
return NS_LITERAL_CSTRING(#aDOMKeyName);
#include "mozilla/VirtualKeyCodeList.h"
#undef NS_DEFINE_VK
#undef NS_DISALLOW_SAME_KEYCODE
default:
return nsPrintfCString("Invalid DOM keyCode (0x%08X)", aKeyCode);
}
}
bool
IsValidRawTextRangeValue(RawTextRangeType aRawTextRangeType)
{
switch (static_cast<TextRangeType>(aRawTextRangeType)) {
case TextRangeType::eUninitialized:
case TextRangeType::eCaret:
case TextRangeType::eRawClause:
case TextRangeType::eSelectedRawClause:
case TextRangeType::eConvertedClause:
case TextRangeType::eSelectedClause:
return true;
default:
return false;
}
}
RawTextRangeType
ToRawTextRangeType(TextRangeType aTextRangeType)
{
return static_cast<RawTextRangeType>(aTextRangeType);
}
TextRangeType
ToTextRangeType(RawTextRangeType aRawTextRangeType)
{
MOZ_ASSERT(IsValidRawTextRangeValue(aRawTextRangeType));
return static_cast<TextRangeType>(aRawTextRangeType);
}
const char*
ToChar(TextRangeType aTextRangeType)
{
switch (aTextRangeType) {
case TextRangeType::eUninitialized:
return "TextRangeType::eUninitialized";
case TextRangeType::eCaret:
return "TextRangeType::eCaret";
case TextRangeType::eRawClause:
return "TextRangeType::eRawClause";
case TextRangeType::eSelectedRawClause:
return "TextRangeType::eSelectedRawClause";
case TextRangeType::eConvertedClause:
return "TextRangeType::eConvertedClause";
case TextRangeType::eSelectedClause:
return "TextRangeType::eSelectedClause";
default:
return "Invalid TextRangeType";
}
}
SelectionType
ToSelectionType(TextRangeType aTextRangeType)
{
switch (aTextRangeType) {
case TextRangeType::eRawClause:
return SelectionType::eIMERawClause;
case TextRangeType::eSelectedRawClause:
return SelectionType::eIMESelectedRawClause;
case TextRangeType::eConvertedClause:
return SelectionType::eIMEConvertedClause;
case TextRangeType::eSelectedClause:
return SelectionType::eIMESelectedClause;
default:
MOZ_CRASH("TextRangeType is invalid");
return SelectionType::eNormal;
}
}
/******************************************************************************
* As*Event() implementation
******************************************************************************/
#define NS_ROOT_EVENT_CLASS(aPrefix, aName)
#define NS_EVENT_CLASS(aPrefix, aName) \
aPrefix##aName* \
WidgetEvent::As##aName() \
{ \
return nullptr; \
} \
\
const aPrefix##aName* \
WidgetEvent::As##aName() const \
{ \
return const_cast<WidgetEvent*>(this)->As##aName(); \
}
#include "mozilla/EventClassList.h"
#undef NS_EVENT_CLASS
#undef NS_ROOT_EVENT_CLASS
/******************************************************************************
* mozilla::WidgetEvent
*
* Event struct type checking methods.
******************************************************************************/
bool
WidgetEvent::IsQueryContentEvent() const
{
return mClass == eQueryContentEventClass;
}
bool
WidgetEvent::IsSelectionEvent() const
{
return mClass == eSelectionEventClass;
}
bool
WidgetEvent::IsContentCommandEvent() const
{
return mClass == eContentCommandEventClass;
}
bool
WidgetEvent::IsNativeEventDelivererForPlugin() const
{
return mClass == ePluginEventClass;
}
/******************************************************************************
* mozilla::WidgetEvent
*
* Event message checking methods.
******************************************************************************/
bool
WidgetEvent::HasMouseEventMessage() const
{
switch (mMessage) {
case eMouseDown:
case eMouseUp:
case eMouseClick:
case eMouseDoubleClick:
case eMouseAuxClick:
case eMouseEnterIntoWidget:
case eMouseExitFromWidget:
case eMouseActivate:
case eMouseOver:
case eMouseOut:
case eMouseHitTest:
case eMouseMove:
return true;
default:
return false;
}
}
bool
WidgetEvent::HasDragEventMessage() const
{
switch (mMessage) {
case eDragEnter:
case eDragOver:
case eDragExit:
case eDrag:
case eDragEnd:
case eDragStart:
case eDrop:
case eDragLeave:
return true;
default:
return false;
}
}
/* static */
bool
WidgetEvent::IsKeyEventMessage(EventMessage aMessage)
{
switch (aMessage) {
case eKeyDown:
case eKeyPress:
case eKeyUp:
case eKeyDownOnPlugin:
case eKeyUpOnPlugin:
case eAccessKeyNotFound:
return true;
default:
return false;
}
}
bool
WidgetEvent::HasIMEEventMessage() const
{
switch (mMessage) {
case eCompositionStart:
case eCompositionEnd:
case eCompositionUpdate:
case eCompositionChange:
case eCompositionCommitAsIs:
case eCompositionCommit:
return true;
default:
return false;
}
}
bool
WidgetEvent::HasPluginActivationEventMessage() const
{
return mMessage == ePluginActivate ||
mMessage == ePluginFocus;
}
/******************************************************************************
* mozilla::WidgetEvent
*
* Specific event checking methods.
******************************************************************************/
bool
WidgetEvent::CanBeSentToRemoteProcess() const
{
// If this event is explicitly marked as shouldn't be sent to remote process,
// just return false.
if (IsCrossProcessForwardingStopped()) {
return false;
}
if (mClass == eKeyboardEventClass ||
mClass == eWheelEventClass) {
return true;
}
switch (mMessage) {
case eMouseDown:
case eMouseUp:
case eMouseMove:
case eContextMenu:
case eMouseEnterIntoWidget:
case eMouseExitFromWidget:
case eMouseTouchDrag:
case eTouchStart:
case eTouchMove:
case eTouchEnd:
case eTouchCancel:
case eDragOver:
case eDragExit:
case eDrop:
return true;
default:
return false;
}
}
bool
WidgetEvent::WillBeSentToRemoteProcess() const
{
// This event won't be posted to remote process if it's already explicitly
// stopped.
if (IsCrossProcessForwardingStopped()) {
return false;
}
// When mOriginalTarget is nullptr, this method shouldn't be used.
if (NS_WARN_IF(!mOriginalTarget)) {
return false;
}
nsCOMPtr<nsIContent> originalTarget = do_QueryInterface(mOriginalTarget);
return EventStateManager::IsRemoteTarget(originalTarget);
}
bool
WidgetEvent::IsRetargetedNativeEventDelivererForPlugin() const
{
const WidgetPluginEvent* pluginEvent = AsPluginEvent();
return pluginEvent && pluginEvent->mRetargetToFocusedDocument;
}
bool
WidgetEvent::IsNonRetargetedNativeEventDelivererForPlugin() const
{
const WidgetPluginEvent* pluginEvent = AsPluginEvent();
return pluginEvent && !pluginEvent->mRetargetToFocusedDocument;
}
bool
WidgetEvent::IsIMERelatedEvent() const
{
return HasIMEEventMessage() || IsQueryContentEvent() || IsSelectionEvent();
}
bool
WidgetEvent::IsUsingCoordinates() const
{
const WidgetMouseEvent* mouseEvent = AsMouseEvent();
if (mouseEvent) {
return !mouseEvent->IsContextMenuKeyEvent();
}
return !HasKeyEventMessage() && !IsIMERelatedEvent() &&
!HasPluginActivationEventMessage() &&
!IsNativeEventDelivererForPlugin() &&
!IsContentCommandEvent();
}
bool
WidgetEvent::IsTargetedAtFocusedWindow() const
{
const WidgetMouseEvent* mouseEvent = AsMouseEvent();
if (mouseEvent) {
return mouseEvent->IsContextMenuKeyEvent();
}
return HasKeyEventMessage() || IsIMERelatedEvent() ||
IsContentCommandEvent() ||
IsRetargetedNativeEventDelivererForPlugin();
}
bool
WidgetEvent::IsTargetedAtFocusedContent() const
{
const WidgetMouseEvent* mouseEvent = AsMouseEvent();
if (mouseEvent) {
return mouseEvent->IsContextMenuKeyEvent();
}
return HasKeyEventMessage() || IsIMERelatedEvent() ||
IsRetargetedNativeEventDelivererForPlugin();
}
bool
WidgetEvent::IsAllowedToDispatchDOMEvent() const
{
switch (mClass) {
case eMouseEventClass:
if (mMessage == eMouseTouchDrag) {
return false;
}
MOZ_FALLTHROUGH;
case ePointerEventClass:
// We want synthesized mouse moves to cause mouseover and mouseout
// DOM events (EventStateManager::PreHandleEvent), but not mousemove
// DOM events.
// Synthesized button up events also do not cause DOM events because they
// do not have a reliable mRefPoint.
return AsMouseEvent()->mReason == WidgetMouseEvent::eReal;
case eWheelEventClass: {
// wheel event whose all delta values are zero by user pref applied, it
// shouldn't cause a DOM event.
const WidgetWheelEvent* wheelEvent = AsWheelEvent();
return wheelEvent->mDeltaX != 0.0 || wheelEvent->mDeltaY != 0.0 ||
wheelEvent->mDeltaZ != 0.0;
}
case eTouchEventClass:
return mMessage != eTouchPointerCancel;
// Following events are handled in EventStateManager, so, we don't need to
// dispatch DOM event for them into the DOM tree.
case eQueryContentEventClass:
case eSelectionEventClass:
case eContentCommandEventClass:
return false;
default:
return true;
}
}
bool
WidgetEvent::IsAllowedToDispatchInSystemGroup() const
{
// We don't expect to implement default behaviors with pointer events because
// if we do, prevent default on mouse events can't prevent default behaviors
// anymore.
return mClass != ePointerEventClass;
}
bool
WidgetEvent::IsBlockedForFingerprintingResistance() const
{
if (!nsContentUtils::ShouldResistFingerprinting()) {
return false;
}
switch (mClass) {
case eKeyboardEventClass: {
const WidgetKeyboardEvent* keyboardEvent = AsKeyboardEvent();
return (keyboardEvent->mKeyNameIndex == KEY_NAME_INDEX_Alt ||
keyboardEvent->mKeyNameIndex == KEY_NAME_INDEX_Shift ||
keyboardEvent->mKeyNameIndex == KEY_NAME_INDEX_Control ||
keyboardEvent->mKeyNameIndex == KEY_NAME_INDEX_AltGraph);
}
case ePointerEventClass: {
const WidgetPointerEvent* pointerEvent = AsPointerEvent();
// We suppress the pointer events if it is not primary for fingerprinting
// resistance. It is because of that we want to spoof any pointer event
// into a mouse pointer event and the mouse pointer event only has
// isPrimary as true.
return !pointerEvent->mIsPrimary;
}
default:
return false;
}
}
/******************************************************************************
* mozilla::WidgetEvent
*
* Misc methods.
******************************************************************************/
static dom::EventTarget*
GetTargetForDOMEvent(dom::EventTarget* aTarget)
{
return aTarget ? aTarget->GetTargetForDOMEvent() : nullptr;
}
dom::EventTarget*
WidgetEvent::GetDOMEventTarget() const
{
return GetTargetForDOMEvent(mTarget);
}
dom::EventTarget*
WidgetEvent::GetCurrentDOMEventTarget() const
{
return GetTargetForDOMEvent(mCurrentTarget);
}
dom::EventTarget*
WidgetEvent::GetOriginalDOMEventTarget() const
{
if (mOriginalTarget) {
return GetTargetForDOMEvent(mOriginalTarget);
}
return GetDOMEventTarget();
}
void
WidgetEvent::PreventDefault(bool aCalledByDefaultHandler,
nsIPrincipal* aPrincipal)
{
if (mMessage == ePointerDown) {
if (aCalledByDefaultHandler) {
// Shouldn't prevent default on pointerdown by default handlers to stop
// firing legacy mouse events. Use MOZ_ASSERT to catch incorrect usages
// in debug builds.
MOZ_ASSERT(false);
return;
}
if (aPrincipal) {
nsAutoString addonId;
Unused << NS_WARN_IF(NS_FAILED(aPrincipal->GetAddonId(addonId)));
if (!addonId.IsEmpty()) {
// Ignore the case that it's called by a web extension.
return;
}
}
}
mFlags.PreventDefault(aCalledByDefaultHandler);
}
bool
WidgetEvent::IsUserAction() const
{
if (!IsTrusted()) {
return false;
}
// FYI: eMouseScrollEventClass and ePointerEventClass represent
// user action but they are synthesized events.
switch (mClass) {
case eKeyboardEventClass:
case eCompositionEventClass:
case eMouseScrollEventClass:
case eWheelEventClass:
case eGestureNotifyEventClass:
case eSimpleGestureEventClass:
case eTouchEventClass:
case eCommandEventClass:
case eContentCommandEventClass:
case ePluginEventClass:
return true;
case eMouseEventClass:
case eDragEventClass:
case ePointerEventClass:
return AsMouseEvent()->IsReal();
default:
return false;
}
}
/******************************************************************************
* mozilla::WidgetInputEvent
******************************************************************************/
/* static */
Modifier
WidgetInputEvent::GetModifier(const nsAString& aDOMKeyName)
{
if (aDOMKeyName.EqualsLiteral("Accel")) {
return AccelModifier();
}
KeyNameIndex keyNameIndex = WidgetKeyboardEvent::GetKeyNameIndex(aDOMKeyName);
return WidgetKeyboardEvent::GetModifierForKeyName(keyNameIndex);
}
/* static */
Modifier
WidgetInputEvent::AccelModifier()
{
static Modifier sAccelModifier = MODIFIER_NONE;
if (sAccelModifier == MODIFIER_NONE) {
switch (Preferences::GetInt("ui.key.accelKey", 0)) {
case dom::KeyboardEvent_Binding::DOM_VK_META:
sAccelModifier = MODIFIER_META;
break;
case dom::KeyboardEvent_Binding::DOM_VK_WIN:
sAccelModifier = MODIFIER_OS;
break;
case dom::KeyboardEvent_Binding::DOM_VK_ALT:
sAccelModifier = MODIFIER_ALT;
break;
case dom::KeyboardEvent_Binding::DOM_VK_CONTROL:
sAccelModifier = MODIFIER_CONTROL;
break;
default:
#ifdef XP_MACOSX
sAccelModifier = MODIFIER_META;
#else
sAccelModifier = MODIFIER_CONTROL;
#endif
break;
}
}
return sAccelModifier;
}
/******************************************************************************
* mozilla::WidgetMouseEvent (MouseEvents.h)
******************************************************************************/
/* static */ bool
WidgetMouseEvent::IsMiddleClickPasteEnabled()
{
return Preferences::GetBool("middlemouse.paste", false);
}
/******************************************************************************
* mozilla::WidgetWheelEvent (MouseEvents.h)
******************************************************************************/
/* static */ double
WidgetWheelEvent::ComputeOverriddenDelta(double aDelta, bool aIsForVertical)
{
if (!gfxPrefs::MouseWheelHasRootScrollDeltaOverride()) {
return aDelta;
}
int32_t intFactor = aIsForVertical
? gfxPrefs::MouseWheelRootScrollVerticalFactor()
: gfxPrefs::MouseWheelRootScrollHorizontalFactor();
// Making the scroll speed slower doesn't make sense. So, ignore odd factor
// which is less than 1.0.
if (intFactor <= 100) {
return aDelta;
}
double factor = static_cast<double>(intFactor) / 100;
return aDelta * factor;
}
double
WidgetWheelEvent::OverriddenDeltaX() const
{
if (!mAllowToOverrideSystemScrollSpeed) {
return mDeltaX;
}
return ComputeOverriddenDelta(mDeltaX, false);
}
double
WidgetWheelEvent::OverriddenDeltaY() const
{
if (!mAllowToOverrideSystemScrollSpeed) {
return mDeltaY;
}
return ComputeOverriddenDelta(mDeltaY, true);
}
/******************************************************************************
* mozilla::WidgetKeyboardEvent (TextEvents.h)
******************************************************************************/
#define NS_DEFINE_KEYNAME(aCPPName, aDOMKeyName) (u"" aDOMKeyName),
const char16_t* const WidgetKeyboardEvent::kKeyNames[] = {
#include "mozilla/KeyNameList.h"
};
#undef NS_DEFINE_KEYNAME
#define NS_DEFINE_PHYSICAL_KEY_CODE_NAME(aCPPName, aDOMCodeName) \
(u"" aDOMCodeName),
const char16_t* const WidgetKeyboardEvent::kCodeNames[] = {
#include "mozilla/PhysicalKeyCodeNameList.h"
};
#undef NS_DEFINE_PHYSICAL_KEY_CODE_NAME
WidgetKeyboardEvent::KeyNameIndexHashtable*
WidgetKeyboardEvent::sKeyNameIndexHashtable = nullptr;
WidgetKeyboardEvent::CodeNameIndexHashtable*
WidgetKeyboardEvent::sCodeNameIndexHashtable = nullptr;
void
WidgetKeyboardEvent::InitAllEditCommands()
{
// If the event was created without widget, e.g., created event in chrome
// script, this shouldn't execute native key bindings.
if (NS_WARN_IF(!mWidget)) {
return;
}
// This event should be trusted event here and we shouldn't expose native
// key binding information to web contents with untrusted events.
if (NS_WARN_IF(!IsTrusted())) {
return;
}
MOZ_ASSERT(XRE_IsParentProcess(),
"It's too expensive to retrieve all edit commands from remote process");
MOZ_ASSERT(!AreAllEditCommandsInitialized(),
"Shouldn't be called two or more times");
InitEditCommandsFor(nsIWidget::NativeKeyBindingsForSingleLineEditor);
InitEditCommandsFor(nsIWidget::NativeKeyBindingsForMultiLineEditor);
InitEditCommandsFor(nsIWidget::NativeKeyBindingsForRichTextEditor);
}
void
WidgetKeyboardEvent::InitEditCommandsFor(nsIWidget::NativeKeyBindingsType aType)
{
if (NS_WARN_IF(!mWidget) || NS_WARN_IF(!IsTrusted())) {
return;
}
bool& initialized = IsEditCommandsInitializedRef(aType);
if (initialized) {
return;
}
nsTArray<CommandInt>& commands = EditCommandsRef(aType);
mWidget->GetEditCommands(aType, *this, commands);
initialized = true;
}
bool
WidgetKeyboardEvent::ExecuteEditCommands(nsIWidget::NativeKeyBindingsType aType,
DoCommandCallback aCallback,
void* aCallbackData)
{
// If the event was created without widget, e.g., created event in chrome
// script, this shouldn't execute native key bindings.
if (NS_WARN_IF(!mWidget)) {
return false;
}
// This event should be trusted event here and we shouldn't expose native
// key binding information to web contents with untrusted events.
if (NS_WARN_IF(!IsTrusted())) {
return false;
}
InitEditCommandsFor(aType);
const nsTArray<CommandInt>& commands = EditCommandsRef(aType);
if (commands.IsEmpty()) {
return false;
}
for (CommandInt command : commands) {
aCallback(static_cast<Command>(command), aCallbackData);
}
return true;
}
bool
WidgetKeyboardEvent::ShouldCauseKeypressEvents() const
{
// Currently, we don't dispatch keypress events of modifier keys and
// dead keys.
switch (mKeyNameIndex) {
case KEY_NAME_INDEX_Alt:
case KEY_NAME_INDEX_AltGraph:
case KEY_NAME_INDEX_CapsLock:
case KEY_NAME_INDEX_Control:
case KEY_NAME_INDEX_Fn:
case KEY_NAME_INDEX_FnLock:
// case KEY_NAME_INDEX_Hyper:
case KEY_NAME_INDEX_Meta:
case KEY_NAME_INDEX_NumLock:
case KEY_NAME_INDEX_OS:
case KEY_NAME_INDEX_ScrollLock:
case KEY_NAME_INDEX_Shift:
// case KEY_NAME_INDEX_Super:
case KEY_NAME_INDEX_Symbol:
case KEY_NAME_INDEX_SymbolLock:
case KEY_NAME_INDEX_Dead:
return false;
default:
return true;
}
}
static bool
HasASCIIDigit(const ShortcutKeyCandidateArray& aCandidates)
{
for (uint32_t i = 0; i < aCandidates.Length(); ++i) {
uint32_t ch = aCandidates[i].mCharCode;
if (ch >= '0' && ch <= '9')
return true;
}
return false;
}
static bool
CharsCaseInsensitiveEqual(uint32_t aChar1, uint32_t aChar2)
{
return aChar1 == aChar2 ||
(IS_IN_BMP(aChar1) && IS_IN_BMP(aChar2) &&
ToLowerCase(static_cast<char16_t>(aChar1)) ==
ToLowerCase(static_cast<char16_t>(aChar2)));
}
static bool
IsCaseChangeableChar(uint32_t aChar)
{
return IS_IN_BMP(aChar) &&
ToLowerCase(static_cast<char16_t>(aChar)) !=
ToUpperCase(static_cast<char16_t>(aChar));
}
void
WidgetKeyboardEvent::GetShortcutKeyCandidates(
ShortcutKeyCandidateArray& aCandidates) const
{
MOZ_ASSERT(aCandidates.IsEmpty(), "aCandidates must be empty");
// ShortcutKeyCandidate::mCharCode is a candidate charCode.
// ShortcutKeyCandidate::mIgnoreShift means the mCharCode should be tried to
// execute a command with/without shift key state. If this is TRUE, the
// shifted key state should be ignored. Otherwise, don't ignore the state.
// the priority of the charCodes are (shift key is not pressed):
// 0: PseudoCharCode()/false,
// 1: unshiftedCharCodes[0]/false, 2: unshiftedCharCodes[1]/false...
// the priority of the charCodes are (shift key is pressed):
// 0: PseudoCharCode()/false,
// 1: shiftedCharCodes[0]/false, 2: shiftedCharCodes[0]/true,
// 3: shiftedCharCodes[1]/false, 4: shiftedCharCodes[1]/true...
uint32_t pseudoCharCode = PseudoCharCode();
if (pseudoCharCode) {
ShortcutKeyCandidate key(pseudoCharCode, false);
aCandidates.AppendElement(key);
}
uint32_t len = mAlternativeCharCodes.Length();
if (!IsShift()) {
for (uint32_t i = 0; i < len; ++i) {
uint32_t ch = mAlternativeCharCodes[i].mUnshiftedCharCode;
if (!ch || ch == pseudoCharCode) {
continue;
}
ShortcutKeyCandidate key(ch, false);
aCandidates.AppendElement(key);
}
// If unshiftedCharCodes doesn't have numeric but shiftedCharCode has it,
// this keyboard layout is AZERTY or similar layout, probably.
// In this case, Accel+[0-9] should be accessible without shift key.
// However, the priority should be lowest.
if (!HasASCIIDigit(aCandidates)) {
for (uint32_t i = 0; i < len; ++i) {
uint32_t ch = mAlternativeCharCodes[i].mShiftedCharCode;
if (ch >= '0' && ch <= '9') {
ShortcutKeyCandidate key(ch, false);
aCandidates.AppendElement(key);
break;
}
}
}
} else {
for (uint32_t i = 0; i < len; ++i) {
uint32_t ch = mAlternativeCharCodes[i].mShiftedCharCode;
if (!ch) {
continue;
}
if (ch != pseudoCharCode) {
ShortcutKeyCandidate key(ch, false);
aCandidates.AppendElement(key);
}
// If the char is an alphabet, the shift key state should not be
// ignored. E.g., Ctrl+Shift+C should not execute Ctrl+C.
// And checking the charCode is same as unshiftedCharCode too.
// E.g., for Ctrl+Shift+(Plus of Numpad) should not run Ctrl+Plus.
uint32_t unshiftCh = mAlternativeCharCodes[i].mUnshiftedCharCode;
if (CharsCaseInsensitiveEqual(ch, unshiftCh)) {
continue;
}
// On the Hebrew keyboard layout on Windows, the unshifted char is a
// localized character but the shifted char is a Latin alphabet,
// then, we should not execute without the shift state. See bug 433192.
if (IsCaseChangeableChar(ch)) {
continue;
}
// Setting the alternative charCode candidates for retry without shift
// key state only when the shift key is pressed.
ShortcutKeyCandidate key(ch, true);
aCandidates.AppendElement(key);
}
}
// Special case for "Space" key. With some keyboard layouts, "Space" with
// or without Shift key causes non-ASCII space. For such keyboard layouts,
// we should guarantee that the key press works as an ASCII white space key
// press. However, if the space key is assigned to a function key, it
// shouldn't work as a space key.
if (mKeyNameIndex == KEY_NAME_INDEX_USE_STRING &&
mCodeNameIndex == CODE_NAME_INDEX_Space && pseudoCharCode != ' ') {
ShortcutKeyCandidate spaceKey(' ', false);
aCandidates.AppendElement(spaceKey);
}
}
void
WidgetKeyboardEvent::GetAccessKeyCandidates(nsTArray<uint32_t>& aCandidates) const
{
MOZ_ASSERT(aCandidates.IsEmpty(), "aCandidates must be empty");
// return the lower cased charCode candidates for access keys.
// the priority of the charCodes are:
// 0: charCode, 1: unshiftedCharCodes[0], 2: shiftedCharCodes[0]
// 3: unshiftedCharCodes[1], 4: shiftedCharCodes[1],...
uint32_t pseudoCharCode = PseudoCharCode();
if (pseudoCharCode) {
uint32_t ch = pseudoCharCode;
if (IS_IN_BMP(ch)) {
ch = ToLowerCase(static_cast<char16_t>(ch));
}
aCandidates.AppendElement(ch);
}
for (uint32_t i = 0; i < mAlternativeCharCodes.Length(); ++i) {
uint32_t ch[2] =
{ mAlternativeCharCodes[i].mUnshiftedCharCode,
mAlternativeCharCodes[i].mShiftedCharCode };
for (uint32_t j = 0; j < 2; ++j) {
if (!ch[j]) {
continue;
}
if (IS_IN_BMP(ch[j])) {
ch[j] = ToLowerCase(static_cast<char16_t>(ch[j]));
}
// Don't append the charcode that was already appended.
if (aCandidates.IndexOf(ch[j]) == aCandidates.NoIndex) {
aCandidates.AppendElement(ch[j]);
}
}
}
// Special case for "Space" key. With some keyboard layouts, "Space" with
// or without Shift key causes non-ASCII space. For such keyboard layouts,
// we should guarantee that the key press works as an ASCII white space key
// press. However, if the space key is assigned to a function key, it
// shouldn't work as a space key.
if (mKeyNameIndex == KEY_NAME_INDEX_USE_STRING &&
mCodeNameIndex == CODE_NAME_INDEX_Space && pseudoCharCode != ' ') {
aCandidates.AppendElement(' ');