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WidgetEventImpl.cpp
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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 "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/StaticPrefs_mousewheel.h"
#include "mozilla/StaticPrefs_ui.h"
#include "mozilla/TextEvents.h"
#include "mozilla/TouchEvents.h"
#include "mozilla/dom/KeyboardEventBinding.h"
#include "nsCommandParams.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 == Command::DoNothing) {
return "CommandDoNothing";
}
switch (aCommand) {
#define NS_DEFINE_COMMAND(aName, aCommandStr) \
case Command::aName: \
return "Command::" #aName;
#define NS_DEFINE_COMMAND_WITH_PARAM(aName, aCommandStr, aParam) \
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_WITH_PARAM
#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;
}
}
/******************************************************************************
* non class method implementation
******************************************************************************/
static nsDataHashtable<nsDepCharHashKey, Command>* sCommandHashtable = nullptr;
Command GetInternalCommand(const char* aCommandName,
const nsCommandParams* aCommandParams) {
if (!aCommandName) {
return Command::DoNothing;
}
// Special cases for "cmd_align". It's mapped to multiple internal commands
// with additional param. Therefore, we cannot handle it with the hashtable.
if (!strcmp(aCommandName, "cmd_align")) {
if (!aCommandParams) {
// Note that if this is called by EditorCommand::IsCommandEnabled(),
// it cannot set aCommandParams. So, don't warn in this case even though
// this is illegal case for DoCommandParams().
return Command::FormatJustify;
}
nsAutoCString cValue;
nsresult rv = aCommandParams->GetCString("state_attribute", cValue);
if (NS_FAILED(rv)) {
nsString value; // Avoid copying the string buffer with using nsString.
rv = aCommandParams->GetString("state_attribute", value);
if (NS_FAILED(rv)) {
return Command::FormatJustifyNone;
}
cValue = NS_ConvertUTF16toUTF8(value);
}
if (cValue.LowerCaseEqualsASCII("left")) {
return Command::FormatJustifyLeft;
}
if (cValue.LowerCaseEqualsASCII("right")) {
return Command::FormatJustifyRight;
}
if (cValue.LowerCaseEqualsASCII("center")) {
return Command::FormatJustifyCenter;
}
if (cValue.LowerCaseEqualsASCII("justify")) {
return Command::FormatJustifyFull;
}
if (cValue.IsEmpty()) {
return Command::FormatJustifyNone;
}
return Command::DoNothing;
}
if (!sCommandHashtable) {
sCommandHashtable = new nsDataHashtable<nsDepCharHashKey, Command>();
#define NS_DEFINE_COMMAND(aName, aCommandStr) \
sCommandHashtable->Put(#aCommandStr, Command::aName);
#define NS_DEFINE_COMMAND_WITH_PARAM(aName, aCommandStr, aParam)
#define NS_DEFINE_COMMAND_NO_EXEC_COMMAND(aName)
#include "mozilla/CommandList.h"
#undef NS_DEFINE_COMMAND
#undef NS_DEFINE_COMMAND_WITH_PARAM
#undef NS_DEFINE_COMMAND_NO_EXEC_COMMAND
}
Command command = Command::DoNothing;
if (!sCommandHashtable->Get(aCommandName, &command)) {
return Command::DoNothing;
}
return command;
}
/******************************************************************************
* 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 (!StaticPrefs::
mousewheel_system_scroll_override_on_root_content_enabled()) {
return aDelta;
}
int32_t intFactor =
aIsForVertical
? StaticPrefs::
mousewheel_system_scroll_override_on_root_content_vertical_factor()
: StaticPrefs::
mousewheel_system_scroll_override_on_root_content_horizontal_factor();
// 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(' ');
}
}
// mask values for ui.key.chromeAccess and ui.key.contentAccess
#define NS_MODIFIER_SHIFT 1
#define NS_MODIFIER_CONTROL 2
#define NS_MODIFIER_ALT 4
#define NS_MODIFIER_META 8
#define NS_MODIFIER_OS 16
static Modifiers PrefFlagsToModifiers(int32_t aPrefFlags) {
Modifiers result = 0;
if (aPrefFlags & NS_MODIFIER_SHIFT) {
result |= MODIFIER_SHIFT;
}
if (aPrefFlags & NS_MODIFIER_CONTROL) {
result |= MODIFIER_CONTROL;
}
if (aPrefFlags & NS_MODIFIER_ALT) {
result |= MODIFIER_ALT;
}
if (aPrefFlags & NS_MODIFIER_META) {
result |= MODIFIER_META;
}
if (aPrefFlags & NS_MODIFIER_OS) {
result |= MODIFIER_OS;
}
return result;
}
bool WidgetKeyboardEvent::ModifiersMatchWithAccessKey(
AccessKeyType aType) const {
if (!ModifiersForAccessKeyMatching()) {
return false;
}