/* -*- 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/. */ #ifndef mozilla_TextEvents_h__ #define mozilla_TextEvents_h__ #include #include "mozilla/Assertions.h" #include "mozilla/BasicEvents.h" #include "mozilla/CheckedInt.h" #include "mozilla/EventForwards.h" // for KeyNameIndex, temporarily #include "mozilla/FontRange.h" #include "mozilla/Maybe.h" #include "mozilla/NativeKeyBindingsType.h" #include "mozilla/OwningNonNull.h" #include "mozilla/TextRange.h" #include "mozilla/WritingModes.h" #include "mozilla/dom/DataTransfer.h" #include "mozilla/dom/KeyboardEventBinding.h" #include "mozilla/dom/StaticRange.h" #include "mozilla/widget/IMEData.h" #include "mozilla/ipc/IPCForwards.h" #include "nsCOMPtr.h" #include "nsHashtablesFwd.h" #include "nsISelectionListener.h" #include "nsITransferable.h" #include "nsRect.h" #include "nsString.h" #include "nsTArray.h" class nsStringHashKey; /****************************************************************************** * virtual keycode values ******************************************************************************/ enum { #define NS_DEFINE_VK(aDOMKeyName, aDOMKeyCode) NS_##aDOMKeyName = aDOMKeyCode, #include "mozilla/VirtualKeyCodeList.h" #undef NS_DEFINE_VK NS_VK_UNKNOWN = 0xFF }; namespace mozilla { enum : uint32_t { eKeyLocationStandard = dom::KeyboardEvent_Binding::DOM_KEY_LOCATION_STANDARD, eKeyLocationLeft = dom::KeyboardEvent_Binding::DOM_KEY_LOCATION_LEFT, eKeyLocationRight = dom::KeyboardEvent_Binding::DOM_KEY_LOCATION_RIGHT, eKeyLocationNumpad = dom::KeyboardEvent_Binding::DOM_KEY_LOCATION_NUMPAD }; const nsCString GetDOMKeyCodeName(uint32_t aKeyCode); namespace dom { class PBrowserParent; class PBrowserChild; } // namespace dom namespace plugins { class PPluginInstanceChild; } // namespace plugins enum class AccessKeyType { // Handle access key for chrome. eChrome, // Handle access key for content. eContent, // Don't handle access key. eNone }; /****************************************************************************** * mozilla::AlternativeCharCode * * This stores alternative charCode values of a key event with some modifiers. * The stored values proper for testing shortcut key or access key. ******************************************************************************/ struct AlternativeCharCode { AlternativeCharCode() : mUnshiftedCharCode(0), mShiftedCharCode(0) {} AlternativeCharCode(uint32_t aUnshiftedCharCode, uint32_t aShiftedCharCode) : mUnshiftedCharCode(aUnshiftedCharCode), mShiftedCharCode(aShiftedCharCode) {} uint32_t mUnshiftedCharCode; uint32_t mShiftedCharCode; }; /****************************************************************************** * mozilla::ShortcutKeyCandidate * * This stores a candidate of shortcut key combination. ******************************************************************************/ struct ShortcutKeyCandidate { ShortcutKeyCandidate() : mCharCode(0), mIgnoreShift(0) {} ShortcutKeyCandidate(uint32_t aCharCode, bool aIgnoreShift) : mCharCode(aCharCode), mIgnoreShift(aIgnoreShift) {} // The mCharCode value which must match keyboard shortcut definition. uint32_t mCharCode; // true if Shift state can be ignored. Otherwise, Shift key state must // match keyboard shortcut definition. bool mIgnoreShift; }; /****************************************************************************** * mozilla::IgnoreModifierState * * This stores flags for modifiers that should be ignored when matching * XBL handlers. ******************************************************************************/ struct IgnoreModifierState { // When mShift is true, Shift key state will be ignored. bool mShift; // When mOS is true, OS key state will be ignored. bool mOS; IgnoreModifierState() : mShift(false), mOS(false) {} }; /****************************************************************************** * mozilla::WidgetKeyboardEvent ******************************************************************************/ class WidgetKeyboardEvent final : public WidgetInputEvent { private: friend class dom::PBrowserParent; friend class dom::PBrowserChild; friend struct IPC::ParamTraits; ALLOW_DEPRECATED_READPARAM protected: WidgetKeyboardEvent() : mNativeKeyEvent(nullptr), mKeyCode(0), mCharCode(0), mPseudoCharCode(0), mLocation(eKeyLocationStandard), mUniqueId(0), mKeyNameIndex(KEY_NAME_INDEX_Unidentified), mCodeNameIndex(CODE_NAME_INDEX_UNKNOWN), mIsRepeat(false), mIsComposing(false), mIsSynthesizedByTIP(false), mMaybeSkippableInRemoteProcess(true), mUseLegacyKeyCodeAndCharCodeValues(false), mEditCommandsForSingleLineEditorInitialized(false), mEditCommandsForMultiLineEditorInitialized(false), mEditCommandsForRichTextEditorInitialized(false) {} public: WidgetKeyboardEvent* AsKeyboardEvent() override { return this; } WidgetKeyboardEvent(bool aIsTrusted, EventMessage aMessage, nsIWidget* aWidget, EventClassID aEventClassID = eKeyboardEventClass) : WidgetInputEvent(aIsTrusted, aMessage, aWidget, aEventClassID), mNativeKeyEvent(nullptr), mKeyCode(0), mCharCode(0), mPseudoCharCode(0), mLocation(eKeyLocationStandard), mUniqueId(0), mKeyNameIndex(KEY_NAME_INDEX_Unidentified), mCodeNameIndex(CODE_NAME_INDEX_UNKNOWN), mIsRepeat(false), mIsComposing(false), mIsSynthesizedByTIP(false), mMaybeSkippableInRemoteProcess(true), mUseLegacyKeyCodeAndCharCodeValues(false), mEditCommandsForSingleLineEditorInitialized(false), mEditCommandsForMultiLineEditorInitialized(false), mEditCommandsForRichTextEditorInitialized(false) {} // IsInputtingText() and IsInputtingLineBreak() are used to check if // it should cause eKeyPress events even on web content. // UI Events defines that "keypress" event should be fired "if and only if // that key normally produces a character value". // // Additionally, for backward compatiblity with all existing browsers, // there is a spec issue for Enter key press. // bool IsInputtingText() const { // NOTE: On some keyboard layout, some characters are inputted with Control // key or Alt key, but at that time, widget clears the modifier flag // from eKeyPress event because our TextEditor won't handle eKeyPress // events as inputting text (bug 1346832). // NOTE: There are some complicated issues of our traditional behavior. // -- On Windows, KeyboardLayout::WillDispatchKeyboardEvent() clears // MODIFIER_ALT and MODIFIER_CONTROL of eKeyPress event if it // should be treated as inputting a character because AltGr is // represented with both Alt key and Ctrl key are pressed, and // some keyboard layouts may produces a character with Ctrl key. // -- On Linux, KeymapWrapper doesn't have this hack since perhaps, // we don't have any bug reports that user cannot input proper // character with Alt and/or Ctrl key. // -- On macOS, IMEInputHandler::WillDispatchKeyboardEvent() clears // MODIFIER_ALT and MDOFIEIR_CONTROL of eKeyPress event only when // TextInputHandler::InsertText() has been called for the event. // I.e., they are cleared only when an editor has focus (even if IME // is disabled in password field or by |ime-mode: disabled;|) because // TextInputHandler::InsertText() is called while // TextInputHandler::HandleKeyDownEvent() calls interpretKeyEvents: // to notify text input processor of Cocoa (including IME). In other // words, when we need to disable IME completey when no editor has // focus, we cannot call interpretKeyEvents:. So, // TextInputHandler::InsertText() won't be called when no editor has // focus so that neither MODIFIER_ALT nor MODIFIER_CONTROL is // cleared. So, fortunately, altKey and ctrlKey values of "keypress" // events are same as the other browsers only when no editor has // focus. // NOTE: As mentioned above, for compatibility with the other browsers on // macOS, we should keep MODIFIER_ALT and MODIFIER_CONTROL flags of // eKeyPress events when no editor has focus. However, Alt key, // labeled "option" on keyboard for Mac, is AltGraph key on the other // platforms. So, even if MODIFIER_ALT is set, we need to dispatch // eKeyPress event even on web content unless mCharCode is 0. // Therefore, we need to ignore MODIFIER_ALT flag here only on macOS. return mMessage == eKeyPress && mCharCode && !(mModifiers & ( #ifndef XP_MACOSX // So, ignore MODIFIER_ALT only on macOS since // option key is used as AltGraph key on macOS. MODIFIER_ALT | #endif // #ifndef XP_MAXOSX MODIFIER_CONTROL | MODIFIER_META | MODIFIER_OS)); } bool IsInputtingLineBreak() const { return mMessage == eKeyPress && mKeyNameIndex == KEY_NAME_INDEX_Enter && !(mModifiers & (MODIFIER_ALT | MODIFIER_CONTROL | MODIFIER_META | MODIFIER_OS)); } /** * ShouldKeyPressEventBeFiredOnContent() should be called only when the * instance is eKeyPress event. This returns true when the eKeyPress * event should be fired even on content in the default event group. */ bool ShouldKeyPressEventBeFiredOnContent() const { MOZ_DIAGNOSTIC_ASSERT(mMessage == eKeyPress); if (IsInputtingText() || IsInputtingLineBreak()) { return true; } // Ctrl + Enter won't cause actual input in our editor. // However, the other browsers fire keypress event in any platforms. // So, for compatibility with them, we should fire keypress event for // Ctrl + Enter too. return mMessage == eKeyPress && mKeyNameIndex == KEY_NAME_INDEX_Enter && !(mModifiers & (MODIFIER_ALT | MODIFIER_META | MODIFIER_OS | MODIFIER_SHIFT)); } WidgetEvent* Duplicate() const override { MOZ_ASSERT(mClass == eKeyboardEventClass, "Duplicate() must be overridden by sub class"); // Not copying widget, it is a weak reference. WidgetKeyboardEvent* result = new WidgetKeyboardEvent(false, mMessage, nullptr); result->AssignKeyEventData(*this, true); result->mEditCommandsForSingleLineEditor = mEditCommandsForSingleLineEditor.Clone(); result->mEditCommandsForMultiLineEditor = mEditCommandsForMultiLineEditor.Clone(); result->mEditCommandsForRichTextEditor = mEditCommandsForRichTextEditor.Clone(); result->mFlags = mFlags; return result; } bool CanUserGestureActivateTarget() const { // Printable keys, 'carriage return' and 'space' are supported user gestures // for activating the document. However, if supported key is being pressed // combining with other operation keys, such like alt, control ..etc., we // won't activate the target for them because at that time user might // interact with browser or window manager which doesn't necessarily // demonstrate user's intent to play media. const bool isCombiningWithOperationKeys = (IsControl() && !IsAltGraph()) || (IsAlt() && !IsAltGraph()) || IsMeta() || IsOS(); const bool isEnterOrSpaceKey = mKeyNameIndex == KEY_NAME_INDEX_Enter || mKeyCode == NS_VK_SPACE; return (PseudoCharCode() || isEnterOrSpaceKey) && (!isCombiningWithOperationKeys || // ctrl-c/ctrl-x/ctrl-v is quite common shortcut for clipboard // operation. // XXXedgar, we have to find a better way to handle browser keyboard // shortcut for user activation, instead of just ignoring all // combinations, see bug 1641171. ((mKeyCode == dom::KeyboardEvent_Binding::DOM_VK_C || mKeyCode == dom::KeyboardEvent_Binding::DOM_VK_V || mKeyCode == dom::KeyboardEvent_Binding::DOM_VK_X) && IsAccel())); } [[nodiscard]] bool ShouldWorkAsSpaceKey() const { if (mKeyCode == NS_VK_SPACE) { return true; } // Additionally, if the code value is "Space" and the key is not mapped to // a function key (i.e., not a printable key), we should treat it as space // key because the active keyboard layout may input different character // from the ASCII white space (U+0020). For example, NBSP (U+00A0). return mKeyNameIndex == KEY_NAME_INDEX_USE_STRING && mCodeNameIndex == CODE_NAME_INDEX_Space; } /** * CanTreatAsUserInput() returns true if the key is pressed for perhaps * doing something on the web app or our UI. This means that when this * returns false, e.g., when user presses a modifier key, user is probably * displeased by opening popup, entering fullscreen mode, etc. Therefore, * only when this returns true, such reactions should be allowed. */ bool CanTreatAsUserInput() const { if (!IsTrusted()) { return false; } switch (mKeyNameIndex) { case KEY_NAME_INDEX_Escape: // modifier keys: 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_Meta: case KEY_NAME_INDEX_NumLock: case KEY_NAME_INDEX_ScrollLock: case KEY_NAME_INDEX_Shift: case KEY_NAME_INDEX_Symbol: case KEY_NAME_INDEX_SymbolLock: // legacy modifier keys: case KEY_NAME_INDEX_Hyper: case KEY_NAME_INDEX_Super: // obsolete modifier key: case KEY_NAME_INDEX_OS: return false; default: return true; } } /** * ShouldInteractionTimeRecorded() returns true if the handling time of * the event should be recorded with the telemetry. */ bool ShouldInteractionTimeRecorded() const { // Let's record only when we can treat the instance is a user input. return CanTreatAsUserInput(); } // OS translated Unicode chars which are used for accesskey and accelkey // handling. The handlers will try from first character to last character. CopyableTArray mAlternativeCharCodes; // DOM KeyboardEvent.key only when mKeyNameIndex is KEY_NAME_INDEX_USE_STRING. nsString mKeyValue; // DOM KeyboardEvent.code only when mCodeNameIndex is // CODE_NAME_INDEX_USE_STRING. nsString mCodeValue; // OS-specific native event can optionally be preserved. // This is used to retrieve editing shortcut keys in the environment. void* mNativeKeyEvent; // A DOM keyCode value or 0. If a keypress event whose mCharCode is 0, this // should be 0. uint32_t mKeyCode; // If the instance is a keypress event of a printable key, this is a UTF-16 // value of the key. Otherwise, 0. This value must not be a control // character when some modifiers are active. Then, this value should be an // unmodified value except Shift and AltGr. uint32_t mCharCode; // mPseudoCharCode is valid only when mMessage is an eKeyDown event. // This stores mCharCode value of keypress event which is fired with same // key value and same modifier state. uint32_t mPseudoCharCode; // One of eKeyLocation* uint32_t mLocation; // Unique id associated with a keydown / keypress event. It's ok if this wraps // over long periods. uint32_t mUniqueId; // DOM KeyboardEvent.key KeyNameIndex mKeyNameIndex; // DOM KeyboardEvent.code CodeNameIndex mCodeNameIndex; // Indicates whether the event is generated by auto repeat or not. // if this is keyup event, always false. bool mIsRepeat; // Indicates whether the event is generated during IME (or deadkey) // composition. This is initialized by EventStateManager. So, key event // dispatchers don't need to initialize this. bool mIsComposing; // Indicates whether the event is synthesized from Text Input Processor // or an actual event from nsAppShell. bool mIsSynthesizedByTIP; // Indicates whether the event is skippable in remote process. // Don't refer this member directly when you need to check this. // Use CanSkipInRemoteProcess() instead. bool mMaybeSkippableInRemoteProcess; // Indicates whether the event should return legacy keyCode value and // charCode value to web apps (one of them is always 0) or not, when it's // an eKeyPress event. bool mUseLegacyKeyCodeAndCharCodeValues; bool CanSkipInRemoteProcess() const { // If this is a repeat event (i.e., generated by auto-repeat feature of // the platform), remove process may skip to handle it because of // performances reasons.. However, if it's caused by odd keyboard utils, // we should not ignore any key events even marked as repeated since // generated key sequence may be important to input proper text. E.g., // "SinhalaTamil IME" on Windows emulates dead key like input with // generating WM_KEYDOWN for VK_PACKET (inputting any Unicode characters // without keyboard layout information) and VK_BACK (Backspace) to remove // previous character(s) and those messages may be marked as "repeat" by // their bug. return mIsRepeat && mMaybeSkippableInRemoteProcess; } /** * If the key is an arrow key, and the current selection is in a vertical * content, the caret should be moved to physically. However, arrow keys * are mapped to logical move commands in horizontal content. Therefore, * we need to check writing mode if and only if the key is an arrow key, and * need to remap the command to logical command in vertical content if the * writing mode at selection is vertical. These methods help to convert * arrow keys in horizontal content to correspnding direction arrow keys * in vertical content. */ bool NeedsToRemapNavigationKey() const { // TODO: Use mKeyNameIndex instead. return mKeyCode >= NS_VK_LEFT && mKeyCode <= NS_VK_DOWN; } uint32_t GetRemappedKeyCode(const WritingMode& aWritingMode) const { if (!aWritingMode.IsVertical()) { return mKeyCode; } switch (mKeyCode) { case NS_VK_LEFT: return aWritingMode.IsVerticalLR() ? NS_VK_UP : NS_VK_DOWN; case NS_VK_RIGHT: return aWritingMode.IsVerticalLR() ? NS_VK_DOWN : NS_VK_UP; case NS_VK_UP: return NS_VK_LEFT; case NS_VK_DOWN: return NS_VK_RIGHT; default: return mKeyCode; } } KeyNameIndex GetRemappedKeyNameIndex(const WritingMode& aWritingMode) const { if (!aWritingMode.IsVertical()) { return mKeyNameIndex; } uint32_t remappedKeyCode = GetRemappedKeyCode(aWritingMode); if (remappedKeyCode == mKeyCode) { return mKeyNameIndex; } switch (remappedKeyCode) { case NS_VK_LEFT: return KEY_NAME_INDEX_ArrowLeft; case NS_VK_RIGHT: return KEY_NAME_INDEX_ArrowRight; case NS_VK_UP: return KEY_NAME_INDEX_ArrowUp; case NS_VK_DOWN: return KEY_NAME_INDEX_ArrowDown; default: MOZ_ASSERT_UNREACHABLE("Add a case for the new remapped key"); return mKeyNameIndex; } } /** * Retrieves all edit commands from mWidget. This shouldn't be called when * the instance is an untrusted event, doesn't have widget or in non-chrome * process. * * @param aWritingMode * When writing mode of focused element is vertical, this * will resolve some key's physical direction to logical * direction. For doing it, this must be set to the * writing mode at current selection. However, when there * is no focused element and no selection ranges, this * should be set to Nothing(). Using the result of * `TextEventDispatcher::MaybeQueryWritingModeAtSelection()` * is recommended. */ MOZ_CAN_RUN_SCRIPT void InitAllEditCommands( const Maybe& aWritingMode); /** * Retrieves edit commands from mWidget only for aType. This shouldn't be * called when the instance is an untrusted event or doesn't have widget. * * @param aWritingMode * When writing mode of focused element is vertical, this * will resolve some key's physical direction to logical * direction. For doing it, this must be set to the * writing mode at current selection. However, when there * is no focused element and no selection ranges, this * should be set to Nothing(). Using the result of * `TextEventDispatcher::MaybeQueryWritingModeAtSelection()` * is recommended. * @return false if some resource is not available to get * commands unexpectedly. Otherwise, true even if * retrieved command is nothing. */ MOZ_CAN_RUN_SCRIPT bool InitEditCommandsFor( NativeKeyBindingsType aType, const Maybe& aWritingMode); /** * PreventNativeKeyBindings() makes the instance to not cause any edit * actions even if it matches with a native key binding. */ void PreventNativeKeyBindings() { mEditCommandsForSingleLineEditor.Clear(); mEditCommandsForMultiLineEditor.Clear(); mEditCommandsForRichTextEditor.Clear(); mEditCommandsForSingleLineEditorInitialized = true; mEditCommandsForMultiLineEditorInitialized = true; mEditCommandsForRichTextEditorInitialized = true; } /** * EditCommandsConstRef() returns reference to edit commands for aType. */ const nsTArray& EditCommandsConstRef( NativeKeyBindingsType aType) const { return const_cast(this)->EditCommandsRef(aType); } /** * IsEditCommandsInitialized() returns true if edit commands for aType * was already initialized. Otherwise, false. */ bool IsEditCommandsInitialized(NativeKeyBindingsType aType) const { return const_cast(this)->IsEditCommandsInitializedRef( aType); } /** * AreAllEditCommandsInitialized() returns true if edit commands for all * types were already initialized. Otherwise, false. */ bool AreAllEditCommandsInitialized() const { return mEditCommandsForSingleLineEditorInitialized && mEditCommandsForMultiLineEditorInitialized && mEditCommandsForRichTextEditorInitialized; } /** * Execute edit commands for aType. * * @return true if the caller should do nothing anymore. * false, otherwise. */ typedef void (*DoCommandCallback)(Command, void*); MOZ_CAN_RUN_SCRIPT bool ExecuteEditCommands(NativeKeyBindingsType aType, DoCommandCallback aCallback, void* aCallbackData); // If the key should cause keypress events, this returns true. // Otherwise, false. bool ShouldCauseKeypressEvents() const; // mCharCode value of non-eKeyPress events is always 0. However, if // non-eKeyPress event has one or more alternative char code values, // its first item should be the mCharCode value of following eKeyPress event. // PseudoCharCode() returns mCharCode value for eKeyPress event, // the first alternative char code value of non-eKeyPress event or 0. uint32_t PseudoCharCode() const { return mMessage == eKeyPress ? mCharCode : mPseudoCharCode; } void SetCharCode(uint32_t aCharCode) { if (mMessage == eKeyPress) { mCharCode = aCharCode; } else { mPseudoCharCode = aCharCode; } } void GetDOMKeyName(nsAString& aKeyName) { if (mKeyNameIndex == KEY_NAME_INDEX_USE_STRING) { aKeyName = mKeyValue; return; } GetDOMKeyName(mKeyNameIndex, aKeyName); } void GetDOMCodeName(nsAString& aCodeName) { if (mCodeNameIndex == CODE_NAME_INDEX_USE_STRING) { aCodeName = mCodeValue; return; } GetDOMCodeName(mCodeNameIndex, aCodeName); } /** * GetFallbackKeyCodeOfPunctuationKey() returns a DOM keyCode value for * aCodeNameIndex. This is keyCode value of the key when active keyboard * layout is ANSI (US), JIS or ABNT keyboard layout (the latter 2 layouts * are used only when ANSI doesn't have the key). The result is useful * if the key doesn't produce ASCII character with active keyboard layout * nor with alternative ASCII capable keyboard layout. */ static uint32_t GetFallbackKeyCodeOfPunctuationKey( CodeNameIndex aCodeNameIndex); bool IsModifierKeyEvent() const { return GetModifierForKeyName(mKeyNameIndex) != MODIFIER_NONE; } /** * Get the candidates for shortcut key. * * @param aCandidates [out] the candidate shortcut key combination list. * the first item is most preferred. */ void GetShortcutKeyCandidates(ShortcutKeyCandidateArray& aCandidates) const; /** * Get the candidates for access key. * * @param aCandidates [out] the candidate access key list. * the first item is most preferred. */ void GetAccessKeyCandidates(nsTArray& aCandidates) const; /** * Check whether the modifiers match with chrome access key or * content access key. */ bool ModifiersMatchWithAccessKey(AccessKeyType aType) const; /** * Return active modifiers which may match with access key. * For example, even if Alt is access key modifier, then, when Control, * CapseLock and NumLock are active, this returns only MODIFIER_CONTROL. */ Modifiers ModifiersForAccessKeyMatching() const; /** * Return access key modifiers. */ static Modifiers AccessKeyModifiers(AccessKeyType aType); static void Shutdown(); /** * ComputeLocationFromCodeValue() returns one of .mLocation value * (eKeyLocation*) which is the most preferred value for the specified code * value. */ static uint32_t ComputeLocationFromCodeValue(CodeNameIndex aCodeNameIndex); /** * ComputeKeyCodeFromKeyNameIndex() return a .mKeyCode value which can be * mapped from the specified key value. Note that this returns 0 if the * key name index is KEY_NAME_INDEX_Unidentified or KEY_NAME_INDEX_USE_STRING. * This means that this method is useful only for non-printable keys. */ static uint32_t ComputeKeyCodeFromKeyNameIndex(KeyNameIndex aKeyNameIndex); /** * ComputeCodeNameIndexFromKeyNameIndex() returns a code name index which * is typically mapped to given key name index on the platform. * Note that this returns CODE_NAME_INDEX_UNKNOWN if the key name index is * KEY_NAME_INDEX_Unidentified or KEY_NAME_INDEX_USE_STRING. * This means that this method is useful only for non-printable keys. * * @param aKeyNameIndex A non-printable key name index. * @param aLocation Should be one of location value. This is * important when aKeyNameIndex may exist in * both Numpad or Standard, or in both Left or * Right. If this is nothing, this method * returns Left or Standard position's code * value. */ static CodeNameIndex ComputeCodeNameIndexFromKeyNameIndex( KeyNameIndex aKeyNameIndex, const Maybe& aLocation); /** * GetModifierForKeyName() returns a value of Modifier which is activated * by the aKeyNameIndex. */ static Modifier GetModifierForKeyName(KeyNameIndex aKeyNameIndex); /** * IsLeftOrRightModiferKeyNameIndex() returns true if aKeyNameIndex is a * modifier key which may be in Left and Right location. */ static bool IsLeftOrRightModiferKeyNameIndex(KeyNameIndex aKeyNameIndex) { switch (aKeyNameIndex) { case KEY_NAME_INDEX_Alt: case KEY_NAME_INDEX_Control: case KEY_NAME_INDEX_Meta: case KEY_NAME_INDEX_OS: case KEY_NAME_INDEX_Shift: return true; default: return false; } } /** * IsLockableModifier() returns true if aKeyNameIndex is a lockable modifier * key such as CapsLock and NumLock. */ static bool IsLockableModifier(KeyNameIndex aKeyNameIndex); static void GetDOMKeyName(KeyNameIndex aKeyNameIndex, nsAString& aKeyName); static void GetDOMCodeName(CodeNameIndex aCodeNameIndex, nsAString& aCodeName); static KeyNameIndex GetKeyNameIndex(const nsAString& aKeyValue); static CodeNameIndex GetCodeNameIndex(const nsAString& aCodeValue); static const char* GetCommandStr(Command aCommand); void AssignKeyEventData(const WidgetKeyboardEvent& aEvent, bool aCopyTargets) { AssignInputEventData(aEvent, aCopyTargets); mKeyCode = aEvent.mKeyCode; mCharCode = aEvent.mCharCode; mPseudoCharCode = aEvent.mPseudoCharCode; mLocation = aEvent.mLocation; mAlternativeCharCodes = aEvent.mAlternativeCharCodes.Clone(); mIsRepeat = aEvent.mIsRepeat; mIsComposing = aEvent.mIsComposing; mKeyNameIndex = aEvent.mKeyNameIndex; mCodeNameIndex = aEvent.mCodeNameIndex; mKeyValue = aEvent.mKeyValue; mCodeValue = aEvent.mCodeValue; // Don't copy mNativeKeyEvent because it may be referred after its instance // is destroyed. mNativeKeyEvent = nullptr; mUniqueId = aEvent.mUniqueId; mIsSynthesizedByTIP = aEvent.mIsSynthesizedByTIP; mMaybeSkippableInRemoteProcess = aEvent.mMaybeSkippableInRemoteProcess; mUseLegacyKeyCodeAndCharCodeValues = aEvent.mUseLegacyKeyCodeAndCharCodeValues; // Don't copy mEditCommandsFor*Editor because it may require a lot of // memory space. For example, if the event is dispatched but grabbed by // a JS variable, they are not necessary anymore. mEditCommandsForSingleLineEditorInitialized = aEvent.mEditCommandsForSingleLineEditorInitialized; mEditCommandsForMultiLineEditorInitialized = aEvent.mEditCommandsForMultiLineEditorInitialized; mEditCommandsForRichTextEditorInitialized = aEvent.mEditCommandsForRichTextEditorInitialized; } void AssignCommands(const WidgetKeyboardEvent& aEvent) { mEditCommandsForSingleLineEditorInitialized = aEvent.mEditCommandsForSingleLineEditorInitialized; if (mEditCommandsForSingleLineEditorInitialized) { mEditCommandsForSingleLineEditor = aEvent.mEditCommandsForSingleLineEditor.Clone(); } else { mEditCommandsForSingleLineEditor.Clear(); } mEditCommandsForMultiLineEditorInitialized = aEvent.mEditCommandsForMultiLineEditorInitialized; if (mEditCommandsForMultiLineEditorInitialized) { mEditCommandsForMultiLineEditor = aEvent.mEditCommandsForMultiLineEditor.Clone(); } else { mEditCommandsForMultiLineEditor.Clear(); } mEditCommandsForRichTextEditorInitialized = aEvent.mEditCommandsForRichTextEditorInitialized; if (mEditCommandsForRichTextEditorInitialized) { mEditCommandsForRichTextEditor = aEvent.mEditCommandsForRichTextEditor.Clone(); } else { mEditCommandsForRichTextEditor.Clear(); } } private: static const char16_t* const kKeyNames[]; static const char16_t* const kCodeNames[]; typedef nsTHashMap KeyNameIndexHashtable; typedef nsTHashMap CodeNameIndexHashtable; static KeyNameIndexHashtable* sKeyNameIndexHashtable; static CodeNameIndexHashtable* sCodeNameIndexHashtable; // mEditCommandsFor*Editor store edit commands. This should be initialized // with InitEditCommandsFor(). // XXX Ideally, this should be array of Command rather than CommandInt. // However, ParamTraits isn't aware of enum array. CopyableTArray mEditCommandsForSingleLineEditor; CopyableTArray mEditCommandsForMultiLineEditor; CopyableTArray mEditCommandsForRichTextEditor; nsTArray& EditCommandsRef(NativeKeyBindingsType aType) { switch (aType) { case NativeKeyBindingsType::SingleLineEditor: return mEditCommandsForSingleLineEditor; case NativeKeyBindingsType::MultiLineEditor: return mEditCommandsForMultiLineEditor; case NativeKeyBindingsType::RichTextEditor: return mEditCommandsForRichTextEditor; default: MOZ_MAKE_COMPILER_ASSUME_IS_UNREACHABLE( "Invalid native key binding type"); } } // mEditCommandsFor*EditorInitialized are set to true when // InitEditCommandsFor() initializes edit commands for the type. bool mEditCommandsForSingleLineEditorInitialized; bool mEditCommandsForMultiLineEditorInitialized; bool mEditCommandsForRichTextEditorInitialized; bool& IsEditCommandsInitializedRef(NativeKeyBindingsType aType) { switch (aType) { case NativeKeyBindingsType::SingleLineEditor: return mEditCommandsForSingleLineEditorInitialized; case NativeKeyBindingsType::MultiLineEditor: return mEditCommandsForMultiLineEditorInitialized; case NativeKeyBindingsType::RichTextEditor: return mEditCommandsForRichTextEditorInitialized; default: MOZ_MAKE_COMPILER_ASSUME_IS_UNREACHABLE( "Invalid native key binding type"); } } }; /****************************************************************************** * mozilla::WidgetCompositionEvent ******************************************************************************/ class WidgetCompositionEvent : public WidgetGUIEvent { private: friend class mozilla::dom::PBrowserParent; friend class mozilla::dom::PBrowserChild; ALLOW_DEPRECATED_READPARAM WidgetCompositionEvent() : mOriginalMessage(eVoidEvent) {} public: virtual WidgetCompositionEvent* AsCompositionEvent() override { return this; } WidgetCompositionEvent(bool aIsTrusted, EventMessage aMessage, nsIWidget* aWidget) : WidgetGUIEvent(aIsTrusted, aMessage, aWidget, eCompositionEventClass), mNativeIMEContext(aWidget), mOriginalMessage(eVoidEvent) {} virtual WidgetEvent* Duplicate() const override { MOZ_ASSERT(mClass == eCompositionEventClass, "Duplicate() must be overridden by sub class"); // Not copying widget, it is a weak reference. WidgetCompositionEvent* result = new WidgetCompositionEvent(false, mMessage, nullptr); result->AssignCompositionEventData(*this, true); result->mFlags = mFlags; return result; } // The composition string or the commit string. If the instance is a // compositionstart event, this is initialized with selected text by // TextComposition automatically. nsString mData; RefPtr mRanges; // mNativeIMEContext stores the native IME context which causes the // composition event. widget::NativeIMEContext mNativeIMEContext; // If the instance is a clone of another event, mOriginalMessage stores // the another event's mMessage. EventMessage mOriginalMessage; void AssignCompositionEventData(const WidgetCompositionEvent& aEvent, bool aCopyTargets) { AssignGUIEventData(aEvent, aCopyTargets); mData = aEvent.mData; mOriginalMessage = aEvent.mOriginalMessage; mRanges = aEvent.mRanges; // Currently, we don't need to copy the other members because they are // for internal use only (not available from JS). } bool IsComposing() const { return mRanges && mRanges->IsComposing(); } uint32_t TargetClauseOffset() const { return mRanges ? mRanges->TargetClauseOffset() : 0; } uint32_t TargetClauseLength() const { uint32_t length = UINT32_MAX; if (mRanges) { length = mRanges->TargetClauseLength(); } return length == UINT32_MAX ? mData.Length() : length; } uint32_t RangeCount() const { return mRanges ? mRanges->Length() : 0; } bool CausesDOMTextEvent() const { return mMessage == eCompositionChange || mMessage == eCompositionCommit || mMessage == eCompositionCommitAsIs; } bool CausesDOMCompositionEndEvent() const { return mMessage == eCompositionEnd || mMessage == eCompositionCommit || mMessage == eCompositionCommitAsIs; } bool IsFollowedByCompositionEnd() const { return IsFollowedByCompositionEnd(mOriginalMessage); } static bool IsFollowedByCompositionEnd(EventMessage aEventMessage) { return aEventMessage == eCompositionCommit || aEventMessage == eCompositionCommitAsIs; } }; /****************************************************************************** * mozilla::WidgetQueryContentEvent ******************************************************************************/ class WidgetQueryContentEvent : public WidgetGUIEvent { private: friend class dom::PBrowserParent; friend class dom::PBrowserChild; ALLOW_DEPRECATED_READPARAM WidgetQueryContentEvent() : mUseNativeLineBreak(true), mWithFontRanges(false), mNeedsToFlushLayout(true) { MOZ_CRASH("WidgetQueryContentEvent is created without proper arguments"); } public: virtual WidgetQueryContentEvent* AsQueryContentEvent() override { return this; } WidgetQueryContentEvent(bool aIsTrusted, EventMessage aMessage, nsIWidget* aWidget) : WidgetGUIEvent(aIsTrusted, aMessage, aWidget, eQueryContentEventClass), mUseNativeLineBreak(true), mWithFontRanges(false), mNeedsToFlushLayout(true) {} WidgetQueryContentEvent(EventMessage aMessage, const WidgetQueryContentEvent& aOtherEvent) : WidgetGUIEvent(aOtherEvent.IsTrusted(), aMessage, const_cast(aOtherEvent.mWidget.get()), eQueryContentEventClass), mUseNativeLineBreak(aOtherEvent.mUseNativeLineBreak), mWithFontRanges(false), mNeedsToFlushLayout(aOtherEvent.mNeedsToFlushLayout) {} virtual WidgetEvent* Duplicate() const override { // This event isn't an internal event of any DOM event. NS_ASSERTION(!IsAllowedToDispatchDOMEvent(), "WidgetQueryContentEvent needs to support Duplicate()"); MOZ_CRASH("WidgetQueryContentEvent doesn't support Duplicate()"); } struct Options final { bool mUseNativeLineBreak; bool mRelativeToInsertionPoint; explicit Options() : mUseNativeLineBreak(true), mRelativeToInsertionPoint(false) {} explicit Options(const WidgetQueryContentEvent& aEvent) : mUseNativeLineBreak(aEvent.mUseNativeLineBreak), mRelativeToInsertionPoint(aEvent.mInput.mRelativeToInsertionPoint) {} }; void Init(const Options& aOptions) { mUseNativeLineBreak = aOptions.mUseNativeLineBreak; mInput.mRelativeToInsertionPoint = aOptions.mRelativeToInsertionPoint; MOZ_ASSERT(mInput.IsValidEventMessage(mMessage)); } void InitForQueryTextContent(int64_t aOffset, uint32_t aLength, const Options& aOptions = Options()) { NS_ASSERTION(mMessage == eQueryTextContent, "wrong initializer is called"); mInput.mOffset = aOffset; mInput.mLength = aLength; Init(aOptions); MOZ_ASSERT(mInput.IsValidOffset()); } void InitForQueryCaretRect(int64_t aOffset, const Options& aOptions = Options()) { NS_ASSERTION(mMessage == eQueryCaretRect, "wrong initializer is called"); mInput.mOffset = aOffset; Init(aOptions); MOZ_ASSERT(mInput.IsValidOffset()); } void InitForQueryTextRect(int64_t aOffset, uint32_t aLength, const Options& aOptions = Options()) { NS_ASSERTION(mMessage == eQueryTextRect, "wrong initializer is called"); mInput.mOffset = aOffset; mInput.mLength = aLength; Init(aOptions); MOZ_ASSERT(mInput.IsValidOffset()); } void InitForQuerySelectedText(SelectionType aSelectionType, const Options& aOptions = Options()) { MOZ_ASSERT(mMessage == eQuerySelectedText); MOZ_ASSERT(aSelectionType != SelectionType::eNone); mInput.mSelectionType = aSelectionType; Init(aOptions); } void InitForQueryDOMWidgetHittest( const mozilla::LayoutDeviceIntPoint& aPoint) { NS_ASSERTION(mMessage == eQueryDOMWidgetHittest, "wrong initializer is called"); mRefPoint = aPoint; } void InitForQueryTextRectArray(uint32_t aOffset, uint32_t aLength, const Options& aOptions = Options()) { NS_ASSERTION(mMessage == eQueryTextRectArray, "wrong initializer is called"); mInput.mOffset = aOffset; mInput.mLength = aLength; Init(aOptions); } bool NeedsToFlushLayout() const { return mNeedsToFlushLayout; } void RequestFontRanges() { MOZ_ASSERT(mMessage == eQueryTextContent); mWithFontRanges = true; } bool Succeeded() const { if (mReply.isNothing()) { return false; } switch (mMessage) { case eQueryTextContent: case eQueryTextRect: case eQueryCaretRect: return mReply->mOffsetAndData.isSome(); default: return true; } } bool Failed() const { return !Succeeded(); } bool FoundSelection() const { MOZ_ASSERT(mMessage == eQuerySelectedText); return Succeeded() && mReply->mOffsetAndData.isSome(); } bool FoundChar() const { MOZ_ASSERT(mMessage == eQueryCharacterAtPoint); return Succeeded() && mReply->mOffsetAndData.isSome(); } bool FoundTentativeCaretOffset() const { MOZ_ASSERT(mMessage == eQueryCharacterAtPoint); return Succeeded() && mReply->mTentativeCaretOffset.isSome(); } bool DidNotFindSelection() const { MOZ_ASSERT(mMessage == eQuerySelectedText); return Failed() || mReply->mOffsetAndData.isNothing(); } bool DidNotFindChar() const { MOZ_ASSERT(mMessage == eQueryCharacterAtPoint); return Failed() || mReply->mOffsetAndData.isNothing(); } bool DidNotFindTentativeCaretOffset() const { MOZ_ASSERT(mMessage == eQueryCharacterAtPoint); return Failed() || mReply->mTentativeCaretOffset.isNothing(); } bool mUseNativeLineBreak; bool mWithFontRanges; bool mNeedsToFlushLayout; struct Input final { uint32_t EndOffset() const { CheckedInt endOffset = CheckedInt(mOffset) + mLength; return NS_WARN_IF(!endOffset.isValid()) ? UINT32_MAX : endOffset.value(); } int64_t mOffset; uint32_t mLength; SelectionType mSelectionType; // If mOffset is true, mOffset is relative to the start offset of // composition if there is, otherwise, the start of the first selection // range. bool mRelativeToInsertionPoint; Input() : mOffset(0), mLength(0), mSelectionType(SelectionType::eNormal), mRelativeToInsertionPoint(false) {} bool IsValidOffset() const { return mRelativeToInsertionPoint || mOffset >= 0; } bool IsValidEventMessage(EventMessage aEventMessage) const { if (!mRelativeToInsertionPoint) { return true; } switch (aEventMessage) { case eQueryTextContent: case eQueryCaretRect: case eQueryTextRect: return true; default: return false; } } bool MakeOffsetAbsolute(uint32_t aInsertionPointOffset) { if (NS_WARN_IF(!mRelativeToInsertionPoint)) { return true; } mRelativeToInsertionPoint = false; // If mOffset + aInsertionPointOffset becomes negative value, // we should assume the absolute offset is 0. if (mOffset < 0 && -mOffset > aInsertionPointOffset) { mOffset = 0; return true; } // Otherwise, we don't allow too large offset. CheckedInt absOffset(mOffset + aInsertionPointOffset); if (NS_WARN_IF(!absOffset.isValid())) { mOffset = UINT32_MAX; return false; } mOffset = absOffset.value(); return true; } } mInput; struct Reply final { EventMessage const mEventMessage; void* mContentsRoot = nullptr; Maybe> mOffsetAndData; // mTentativeCaretOffset is used by only eQueryCharacterAtPoint. // This is the offset where caret would be if user clicked at the mRefPoint. Maybe mTentativeCaretOffset; // mRect is used by eQueryTextRect, eQueryCaretRect, eQueryCharacterAtPoint // and eQueryEditorRect. The coordinates is system coordinates relative to // the top level widget of mFocusedWidget. E.g., if a which // is owned by a window has focused editor, the offset of mRect is relative // to the owner window, not the . mozilla::LayoutDeviceIntRect mRect; // The return widget has the caret. This is set at all query events. nsIWidget* mFocusedWidget = nullptr; // mozilla::WritingMode value at the end (focus) of the selection mozilla::WritingMode mWritingMode; // Used by eQuerySelectionAsTransferable nsCOMPtr mTransferable; // Used by eQueryTextContent with font ranges requested CopyableAutoTArray mFontRanges; // Used by eQueryTextRectArray CopyableTArray mRectArray; // true if selection is reversed (end < start) bool mReversed = false; // true if DOM element under mouse belongs to widget bool mWidgetIsHit = false; // true if mContentRoot is focused editable content bool mIsEditableContent = false; Reply() = delete; explicit Reply(EventMessage aEventMessage) : mEventMessage(aEventMessage) {} // Don't allow to copy/move because of `mEventMessage`. Reply(const Reply& aOther) = delete; Reply(Reply&& aOther) = delete; Reply& operator=(const Reply& aOther) = delete; Reply& operator=(Reply&& aOther) = delete; MOZ_NEVER_INLINE_DEBUG uint32_t StartOffset() const { MOZ_ASSERT(mOffsetAndData.isSome()); return mOffsetAndData->StartOffset(); } MOZ_NEVER_INLINE_DEBUG uint32_t EndOffset() const { MOZ_ASSERT(mOffsetAndData.isSome()); return mOffsetAndData->EndOffset(); } MOZ_NEVER_INLINE_DEBUG uint32_t DataLength() const { MOZ_ASSERT(mOffsetAndData.isSome() || mEventMessage == eQuerySelectedText); return mOffsetAndData.isSome() ? mOffsetAndData->Length() : 0; } MOZ_NEVER_INLINE_DEBUG uint32_t AnchorOffset() const { MOZ_ASSERT(mEventMessage == eQuerySelectedText); MOZ_ASSERT(mOffsetAndData.isSome()); return StartOffset() + (mReversed ? DataLength() : 0); } MOZ_NEVER_INLINE_DEBUG uint32_t FocusOffset() const { MOZ_ASSERT(mEventMessage == eQuerySelectedText); MOZ_ASSERT(mOffsetAndData.isSome()); return StartOffset() + (mReversed ? 0 : DataLength()); } const WritingMode& WritingModeRef() const { MOZ_ASSERT(mEventMessage == eQuerySelectedText || mEventMessage == eQueryCaretRect || mEventMessage == eQueryTextRect); MOZ_ASSERT(mOffsetAndData.isSome() || mEventMessage == eQuerySelectedText); return mWritingMode; } MOZ_NEVER_INLINE_DEBUG const nsString& DataRef() const { MOZ_ASSERT(mOffsetAndData.isSome() || mEventMessage == eQuerySelectedText); return mOffsetAndData.isSome() ? mOffsetAndData->DataRef() : EmptyString(); } MOZ_NEVER_INLINE_DEBUG bool IsDataEmpty() const { MOZ_ASSERT(mOffsetAndData.isSome() || mEventMessage == eQuerySelectedText); return mOffsetAndData.isSome() ? mOffsetAndData->IsDataEmpty() : true; } MOZ_NEVER_INLINE_DEBUG bool IsOffsetInRange(uint32_t aOffset) const { MOZ_ASSERT(mOffsetAndData.isSome() || mEventMessage == eQuerySelectedText); return mOffsetAndData.isSome() ? mOffsetAndData->IsOffsetInRange(aOffset) : false; } MOZ_NEVER_INLINE_DEBUG bool IsOffsetInRangeOrEndOffset( uint32_t aOffset) const { MOZ_ASSERT(mOffsetAndData.isSome() || mEventMessage == eQuerySelectedText); return mOffsetAndData.isSome() ? mOffsetAndData->IsOffsetInRangeOrEndOffset(aOffset) : false; } MOZ_NEVER_INLINE_DEBUG void TruncateData(uint32_t aLength = 0) { MOZ_ASSERT(mOffsetAndData.isSome()); mOffsetAndData->TruncateData(aLength); } friend std::ostream& operator<<(std::ostream& aStream, const Reply& aReply) { aStream << "{ "; if (aReply.mEventMessage == eQuerySelectedText || aReply.mEventMessage == eQueryTextContent || aReply.mEventMessage == eQueryTextRect || aReply.mEventMessage == eQueryCaretRect || aReply.mEventMessage == eQueryCharacterAtPoint) { aStream << "mOffsetAndData=" << ToString(aReply.mOffsetAndData).c_str() << ", "; if (aReply.mEventMessage == eQueryCharacterAtPoint) { aStream << "mTentativeCaretOffset=" << ToString(aReply.mTentativeCaretOffset).c_str() << ", "; } } if (aReply.mOffsetAndData.isSome() && aReply.mOffsetAndData->Length()) { if (aReply.mEventMessage == eQuerySelectedText) { aStream << ", mReversed=" << (aReply.mReversed ? "true" : "false"); } if (aReply.mEventMessage == eQuerySelectionAsTransferable) { aStream << ", mTransferable=0x" << aReply.mTransferable; } } if (aReply.mEventMessage == eQuerySelectedText || aReply.mEventMessage == eQueryTextRect || aReply.mEventMessage == eQueryCaretRect) { aStream << ", mWritingMode=" << ToString(aReply.mWritingMode).c_str(); } aStream << ", mContentsRoot=0x" << aReply.mContentsRoot << ", mIsEditableContent=" << (aReply.mIsEditableContent ? "true" : "false") << ", mFocusedWidget=0x" << aReply.mFocusedWidget; if (aReply.mEventMessage == eQueryTextContent) { aStream << ", mFontRanges={ Length()=" << aReply.mFontRanges.Length() << " }"; } else if (aReply.mEventMessage == eQueryTextRect || aReply.mEventMessage == eQueryCaretRect || aReply.mEventMessage == eQueryCharacterAtPoint) { aStream << ", mRect=" << ToString(aReply.mRect).c_str(); } else if (aReply.mEventMessage == eQueryTextRectArray) { aStream << ", mRectArray={ Length()=" << aReply.mRectArray.Length() << " }"; } else if (aReply.mEventMessage == eQueryDOMWidgetHittest) { aStream << ", mWidgetIsHit=" << (aReply.mWidgetIsHit ? "true" : "false"); } return aStream << " }"; } }; void EmplaceReply() { mReply.emplace(mMessage); } Maybe mReply; // values of mComputedScrollAction enum { SCROLL_ACTION_NONE, SCROLL_ACTION_LINE, SCROLL_ACTION_PAGE }; }; /****************************************************************************** * mozilla::WidgetSelectionEvent ******************************************************************************/ class WidgetSelectionEvent : public WidgetGUIEvent { private: friend class mozilla::dom::PBrowserParent; friend class mozilla::dom::PBrowserChild; ALLOW_DEPRECATED_READPARAM WidgetSelectionEvent() : mOffset(0), mLength(0), mReversed(false), mExpandToClusterBoundary(true), mSucceeded(false), mUseNativeLineBreak(true), mReason(nsISelectionListener::NO_REASON) {} public: virtual WidgetSelectionEvent* AsSelectionEvent() override { return this; } WidgetSelectionEvent(bool aIsTrusted, EventMessage aMessage, nsIWidget* aWidget) : WidgetGUIEvent(aIsTrusted, aMessage, aWidget, eSelectionEventClass), mOffset(0), mLength(0), mReversed(false), mExpandToClusterBoundary(true), mSucceeded(false), mUseNativeLineBreak(true), mReason(nsISelectionListener::NO_REASON) {} virtual WidgetEvent* Duplicate() const override { // This event isn't an internal event of any DOM event. NS_ASSERTION(!IsAllowedToDispatchDOMEvent(), "WidgetSelectionEvent needs to support Duplicate()"); MOZ_CRASH("WidgetSelectionEvent doesn't support Duplicate()"); return nullptr; } // Start offset of selection uint32_t mOffset; // Length of selection uint32_t mLength; // Selection "anchor" should be in front bool mReversed; // Cluster-based or character-based bool mExpandToClusterBoundary; // true if setting selection succeeded. bool mSucceeded; // true if native line breaks are used for mOffset and mLength bool mUseNativeLineBreak; // Fennec provides eSetSelection reason codes for downstream // use in AccessibleCaret visibility logic. int16_t mReason; }; /****************************************************************************** * mozilla::InternalEditorInputEvent ******************************************************************************/ class InternalEditorInputEvent : public InternalUIEvent { private: InternalEditorInputEvent() : mData(VoidString()), mInputType(EditorInputType::eUnknown), mIsComposing(false) {} public: virtual InternalEditorInputEvent* AsEditorInputEvent() override { return this; } InternalEditorInputEvent(bool aIsTrusted, EventMessage aMessage, nsIWidget* aWidget = nullptr) : InternalUIEvent(aIsTrusted, aMessage, aWidget, eEditorInputEventClass), mData(VoidString()), mInputType(EditorInputType::eUnknown) {} virtual WidgetEvent* Duplicate() const override { MOZ_ASSERT(mClass == eEditorInputEventClass, "Duplicate() must be overridden by sub class"); // Not copying widget, it is a weak reference. InternalEditorInputEvent* result = new InternalEditorInputEvent(false, mMessage, nullptr); result->AssignEditorInputEventData(*this, true); result->mFlags = mFlags; return result; } nsString mData; RefPtr mDataTransfer; OwningNonNullStaticRangeArray mTargetRanges; EditorInputType mInputType; bool mIsComposing; void AssignEditorInputEventData(const InternalEditorInputEvent& aEvent, bool aCopyTargets) { AssignUIEventData(aEvent, aCopyTargets); mData = aEvent.mData; mDataTransfer = aEvent.mDataTransfer; mTargetRanges = aEvent.mTargetRanges.Clone(); mInputType = aEvent.mInputType; mIsComposing = aEvent.mIsComposing; } void GetDOMInputTypeName(nsAString& aInputTypeName) { GetDOMInputTypeName(mInputType, aInputTypeName); } static void GetDOMInputTypeName(EditorInputType aInputType, nsAString& aInputTypeName); static EditorInputType GetEditorInputType(const nsAString& aInputType); static void Shutdown(); private: static const char16_t* const kInputTypeNames[]; typedef nsTHashMap InputTypeHashtable; static InputTypeHashtable* sInputTypeHashtable; }; } // namespace mozilla #endif // mozilla_TextEvents_h__