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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /widget/cocoa/TextInputHandler.h
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'widget/cocoa/TextInputHandler.h')
-rw-r--r--widget/cocoa/TextInputHandler.h1352
1 files changed, 1352 insertions, 0 deletions
diff --git a/widget/cocoa/TextInputHandler.h b/widget/cocoa/TextInputHandler.h
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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 sw=2 et tw=80: */
+/* 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 TextInputHandler_h_
+#define TextInputHandler_h_
+
+#include "nsCocoaUtils.h"
+
+#import <Carbon/Carbon.h>
+#import <Cocoa/Cocoa.h>
+#include "mozView.h"
+#include "nsString.h"
+#include "nsCOMPtr.h"
+#include "nsITimer.h"
+#include "nsTArray.h"
+#include "mozilla/BasicEvents.h"
+#include "mozilla/EventForwards.h"
+#include "mozilla/TextEventDispatcherListener.h"
+#include "WritingModes.h"
+
+class nsChildView;
+
+namespace mozilla {
+namespace widget {
+
+// Key code constants
+enum {
+ kVK_PC_PrintScreen = kVK_F13,
+ kVK_PC_ScrollLock = kVK_F14,
+ kVK_PC_Pause = kVK_F15,
+
+ kVK_PC_Insert = kVK_Help,
+ kVK_PC_Backspace = kVK_Delete,
+ kVK_PC_Delete = kVK_ForwardDelete,
+
+ kVK_PC_ContextMenu = 0x6E,
+
+ kVK_Powerbook_KeypadEnter =
+ 0x34 // Enter on Powerbook's keyboard is different
+};
+
+/**
+ * TISInputSourceWrapper is a wrapper for the TISInputSourceRef. If we get the
+ * TISInputSourceRef from InputSourceID, we need to release the CFArray instance
+ * which is returned by TISCreateInputSourceList. However, when we release the
+ * list, we cannot access the TISInputSourceRef. So, it's not usable, and it
+ * may cause the memory leak bugs. nsTISInputSource automatically releases the
+ * list when the instance is destroyed.
+ */
+class TISInputSourceWrapper {
+ public:
+ static TISInputSourceWrapper& CurrentInputSource();
+ /**
+ * Shutdown() should be called when nobody doesn't need to use this class.
+ */
+ static void Shutdown();
+
+ TISInputSourceWrapper()
+ : mInputSource{nullptr},
+ mKeyboardLayout{nullptr},
+ mUCKeyboardLayout{nullptr},
+ mIsRTL{0},
+ mOverrideKeyboard{false} {
+ mInputSourceList = nullptr;
+ Clear();
+ }
+
+ explicit TISInputSourceWrapper(const char* aID)
+ : mInputSource{nullptr},
+ mKeyboardLayout{nullptr},
+ mUCKeyboardLayout{nullptr},
+ mIsRTL{0},
+ mOverrideKeyboard{false} {
+ mInputSourceList = nullptr;
+ InitByInputSourceID(aID);
+ }
+
+ explicit TISInputSourceWrapper(SInt32 aLayoutID)
+ : mInputSource{nullptr},
+ mKeyboardLayout{nullptr},
+ mUCKeyboardLayout{nullptr},
+ mIsRTL{0},
+ mOverrideKeyboard{false} {
+ mInputSourceList = nullptr;
+ InitByLayoutID(aLayoutID);
+ }
+
+ explicit TISInputSourceWrapper(TISInputSourceRef aInputSource)
+ : mInputSource{nullptr},
+ mKeyboardLayout{nullptr},
+ mUCKeyboardLayout{nullptr},
+ mIsRTL{0},
+ mOverrideKeyboard{false} {
+ mInputSourceList = nullptr;
+ InitByTISInputSourceRef(aInputSource);
+ }
+
+ ~TISInputSourceWrapper() { Clear(); }
+
+ void InitByInputSourceID(const char* aID);
+ void InitByInputSourceID(const nsString& aID);
+ void InitByInputSourceID(const CFStringRef aID);
+ /**
+ * InitByLayoutID() initializes the keyboard layout by the layout ID.
+ *
+ * @param aLayoutID An ID of keyboard layout.
+ * 0: US
+ * 1: Greek
+ * 2: German
+ * 3: Swedish-Pro
+ * 4: Dvorak-Qwerty Cmd
+ * 5: Thai
+ * 6: Arabic
+ * 7: French
+ * 8: Hebrew
+ * 9: Lithuanian
+ * 10: Norwegian
+ * 11: Spanish
+ * @param aOverrideKeyboard When testing set to TRUE, otherwise, set to
+ * FALSE. When TRUE, we use an ANSI keyboard
+ * instead of the actual keyboard.
+ */
+ void InitByLayoutID(SInt32 aLayoutID, bool aOverrideKeyboard = false);
+ void InitByCurrentInputSource();
+ void InitByCurrentKeyboardLayout();
+ void InitByCurrentASCIICapableInputSource();
+ void InitByCurrentASCIICapableKeyboardLayout();
+ void InitByCurrentInputMethodKeyboardLayoutOverride();
+ void InitByTISInputSourceRef(TISInputSourceRef aInputSource);
+ void InitByLanguage(CFStringRef aLanguage);
+
+ /**
+ * If the instance is initialized with a keyboard layout input source,
+ * returns it.
+ * If the instance is initialized with an IME mode input source, the result
+ * references the keyboard layout for the IME mode. However, this can be
+ * initialized only when the IME mode is actually selected. I.e, if IME mode
+ * input source is initialized with LayoutID or SourceID, this returns null.
+ */
+ TISInputSourceRef GetKeyboardLayoutInputSource() const {
+ return mKeyboardLayout;
+ }
+ const UCKeyboardLayout* GetUCKeyboardLayout();
+
+ bool IsOpenedIMEMode();
+ bool IsIMEMode();
+ bool IsKeyboardLayout();
+
+ bool IsASCIICapable() {
+ NS_ENSURE_TRUE(mInputSource, false);
+ return GetBoolProperty(kTISPropertyInputSourceIsASCIICapable);
+ }
+
+ bool IsEnabled() {
+ NS_ENSURE_TRUE(mInputSource, false);
+ return GetBoolProperty(kTISPropertyInputSourceIsEnabled);
+ }
+
+ bool GetLanguageList(CFArrayRef& aLanguageList);
+ bool GetPrimaryLanguage(CFStringRef& aPrimaryLanguage);
+ bool GetPrimaryLanguage(nsAString& aPrimaryLanguage);
+
+ bool GetLocalizedName(CFStringRef& aName) {
+ NS_ENSURE_TRUE(mInputSource, false);
+ return GetStringProperty(kTISPropertyLocalizedName, aName);
+ }
+
+ bool GetLocalizedName(nsAString& aName) {
+ NS_ENSURE_TRUE(mInputSource, false);
+ return GetStringProperty(kTISPropertyLocalizedName, aName);
+ }
+
+ bool GetInputSourceID(CFStringRef& aID) {
+ NS_ENSURE_TRUE(mInputSource, false);
+ return GetStringProperty(kTISPropertyInputSourceID, aID);
+ }
+
+ bool GetInputSourceID(nsAString& aID) {
+ NS_ENSURE_TRUE(mInputSource, false);
+ return GetStringProperty(kTISPropertyInputSourceID, aID);
+ }
+
+ bool GetBundleID(CFStringRef& aBundleID) {
+ NS_ENSURE_TRUE(mInputSource, false);
+ return GetStringProperty(kTISPropertyBundleID, aBundleID);
+ }
+
+ bool GetBundleID(nsAString& aBundleID) {
+ NS_ENSURE_TRUE(mInputSource, false);
+ return GetStringProperty(kTISPropertyBundleID, aBundleID);
+ }
+
+ bool GetInputSourceType(CFStringRef& aType) {
+ NS_ENSURE_TRUE(mInputSource, false);
+ return GetStringProperty(kTISPropertyInputSourceType, aType);
+ }
+
+ bool GetInputSourceType(nsAString& aType) {
+ NS_ENSURE_TRUE(mInputSource, false);
+ return GetStringProperty(kTISPropertyInputSourceType, aType);
+ }
+
+ bool IsForRTLLanguage();
+ bool IsForJapaneseLanguage();
+ bool IsInitializedByCurrentInputSource();
+
+ enum {
+ // 40 is an actual result of the ::LMGetKbdType() when we connect an
+ // unknown keyboard and set the keyboard type to ANSI manually on the
+ // set up dialog.
+ eKbdType_ANSI = 40
+ };
+
+ void Select();
+ void Clear();
+
+ /**
+ * InitKeyEvent() initializes aKeyEvent for aNativeKeyEvent.
+ *
+ * @param aNativeKeyEvent A native key event for which you want to
+ * dispatch a Gecko key event.
+ * @param aKeyEvent The result -- a Gecko key event initialized
+ * from the native key event.
+ * @param aIsProcessedByIME true if aNativeKeyEvent has been handled
+ * by IME (but except if the composition was
+ * started with dead key).
+ * @param aInsertString If caller expects that the event will cause
+ * a character to be input (say in an editor),
+ * the caller should set this. Otherwise,
+ * if caller sets null to this, this method will
+ * compute the character to be input from
+ * characters of aNativeKeyEvent.
+ */
+ void InitKeyEvent(NSEvent* aNativeKeyEvent, WidgetKeyboardEvent& aKeyEvent,
+ bool aIsProcessedByIME,
+ const nsAString* aInsertString = nullptr);
+
+ /**
+ * WillDispatchKeyboardEvent() computes aKeyEvent.mAlternativeCharCodes and
+ * recompute aKeyEvent.mCharCode if it's necessary.
+ *
+ * @param aNativeKeyEvent A native key event for which you want to
+ * dispatch a Gecko key event.
+ * @param aInsertString If caller expects that the event will cause
+ * a character to be input (say in an editor),
+ * the caller should set this. Otherwise,
+ * if caller sets null to this, this method will
+ * compute the character to be input from
+ * characters of aNativeKeyEvent.
+ * @param aIndexOfKeypress Index of the eKeyPress event. If a key
+ * inputs 2 or more characters, eKeyPress events
+ * are dispatched for each character. This is
+ * 0 for the first eKeyPress event.
+ * @param aKeyEvent The result -- a Gecko key event initialized
+ * from the native key event. This must be
+ * eKeyPress event.
+ */
+ void WillDispatchKeyboardEvent(NSEvent* aNativeKeyEvent,
+ const nsAString* aInsertString,
+ uint32_t aIndexOfKeypress,
+ WidgetKeyboardEvent& aKeyEvent);
+
+ /**
+ * ComputeGeckoKeyCode() returns Gecko keycode for aNativeKeyCode on current
+ * keyboard layout.
+ *
+ * @param aNativeKeyCode A native keycode.
+ * @param aKbType A native Keyboard Type value. Typically,
+ * this is a result of ::LMGetKbdType().
+ * @param aCmdIsPressed TRUE if Cmd key is pressed. Otherwise, FALSE.
+ * @return The computed Gecko keycode.
+ */
+ uint32_t ComputeGeckoKeyCode(UInt32 aNativeKeyCode, UInt32 aKbType,
+ bool aCmdIsPressed);
+
+ /**
+ * ComputeGeckoKeyNameIndex() returns Gecko key name index for the key.
+ *
+ * @param aNativeKeyCode A native keycode.
+ */
+ static KeyNameIndex ComputeGeckoKeyNameIndex(UInt32 aNativeKeyCode);
+
+ /**
+ * ComputeGeckoCodeNameIndex() returns Gecko code name index for the key.
+ *
+ * @param aNativeKeyCode A native keycode.
+ * @param aKbType A native Keyboard Type value. Typically,
+ * this is a result of ::LMGetKbdType().
+ */
+ static CodeNameIndex ComputeGeckoCodeNameIndex(UInt32 aNativeKeyCode,
+ UInt32 aKbType);
+
+ /**
+ * TranslateToChar() checks if aNativeKeyEvent is a dead key.
+ *
+ * @param aNativeKeyEvent A native key event.
+ * @return Returns true if the key event is a dead key
+ * event. Otherwise, false.
+ */
+ bool IsDeadKey(NSEvent* aNativeKeyEvent);
+
+ protected:
+ /**
+ * TranslateToString() computes the inputted text from the native keyCode,
+ * modifier flags and keyboard type.
+ *
+ * @param aKeyCode A native keyCode.
+ * @param aModifiers Combination of native modifier flags.
+ * @param aKbType A native Keyboard Type value. Typically,
+ * this is a result of ::LMGetKbdType().
+ * @param aStr Result, i.e., inputted text.
+ * The result can be two or more characters.
+ * @return If succeeded, TRUE. Otherwise, FALSE.
+ * Even if TRUE, aStr can be empty string.
+ */
+ bool TranslateToString(UInt32 aKeyCode, UInt32 aModifiers, UInt32 aKbType,
+ nsAString& aStr);
+
+ /**
+ * TranslateToChar() computes the inputted character from the native keyCode,
+ * modifier flags and keyboard type. If two or more characters would be
+ * input, this returns 0.
+ *
+ * @param aKeyCode A native keyCode.
+ * @param aModifiers Combination of native modifier flags.
+ * @param aKbType A native Keyboard Type value. Typically,
+ * this is a result of ::LMGetKbdType().
+ * @return If succeeded and the result is one character,
+ * returns the charCode of it. Otherwise,
+ * returns 0.
+ */
+ uint32_t TranslateToChar(UInt32 aKeyCode, UInt32 aModifiers, UInt32 aKbType);
+
+ /**
+ * TranslateToChar() checks if aKeyCode with aModifiers is a dead key.
+ *
+ * @param aKeyCode A native keyCode.
+ * @param aModifiers Combination of native modifier flags.
+ * @param aKbType A native Keyboard Type value. Typically,
+ * this is a result of ::LMGetKbdType().
+ * @return Returns true if the key with specified
+ * modifier state is a dead key. Otherwise,
+ * false.
+ */
+ bool IsDeadKey(UInt32 aKeyCode, UInt32 aModifiers, UInt32 aKbType);
+
+ /**
+ * ComputeInsertString() computes string to be inserted with the key event.
+ *
+ * @param aNativeKeyEvent The native key event which causes our keyboard
+ * event(s).
+ * @param aKeyEvent A Gecko key event which was partially
+ * initialized with aNativeKeyEvent.
+ * @param aInsertString The string to be inputting by aNativeKeyEvent.
+ * This should be specified by InsertText().
+ * In other words, if the key event doesn't cause
+ * a call of InsertText(), this can be nullptr.
+ * @param aResult The string which should be set to charCode of
+ * keypress event(s).
+ */
+ void ComputeInsertStringForCharCode(NSEvent* aNativeKeyEvent,
+ const WidgetKeyboardEvent& aKeyEvent,
+ const nsAString* aInsertString,
+ nsAString& aResult);
+
+ /**
+ * IsPrintableKeyEvent() returns true if aNativeKeyEvent is caused by
+ * a printable key. Otherwise, returns false.
+ */
+ bool IsPrintableKeyEvent(NSEvent* aNativeKeyEvent) const;
+
+ /**
+ * GetKbdType() returns physical keyboard type.
+ */
+ UInt32 GetKbdType() const;
+
+ bool GetBoolProperty(const CFStringRef aKey);
+ bool GetStringProperty(const CFStringRef aKey, CFStringRef& aStr);
+ bool GetStringProperty(const CFStringRef aKey, nsAString& aStr);
+
+ TISInputSourceRef mInputSource;
+ TISInputSourceRef mKeyboardLayout;
+ CFArrayRef mInputSourceList;
+ const UCKeyboardLayout* mUCKeyboardLayout;
+ int8_t mIsRTL;
+
+ bool mOverrideKeyboard;
+
+ static TISInputSourceWrapper* sCurrentInputSource;
+};
+
+/**
+ * TextInputHandlerBase is a base class of IMEInputHandler and TextInputHandler.
+ * Utility methods should be implemented this level.
+ */
+
+class TextInputHandlerBase : public TextEventDispatcherListener {
+ public:
+ /**
+ * Other TextEventDispatcherListener methods should be implemented in
+ * IMEInputHandler.
+ */
+ NS_DECL_ISUPPORTS
+
+ /**
+ * DispatchEvent() dispatches aEvent on mWidget.
+ *
+ * @param aEvent An event which you want to dispatch.
+ * @return TRUE if the event is consumed by web contents
+ * or chrome contents. Otherwise, FALSE.
+ */
+ bool DispatchEvent(WidgetGUIEvent& aEvent);
+
+ /**
+ * SetSelection() dispatches eSetSelection event for the aRange.
+ *
+ * @param aRange The range which will be selected.
+ * @return TRUE if setting selection is succeeded and
+ * the widget hasn't been destroyed.
+ * Otherwise, FALSE.
+ */
+ bool SetSelection(NSRange& aRange);
+
+ /**
+ * InitKeyEvent() initializes aKeyEvent for aNativeKeyEvent.
+ *
+ * @param aNativeKeyEvent A native key event for which you want to
+ * dispatch a Gecko key event.
+ * @param aKeyEvent The result -- a Gecko key event initialized
+ * from the native key event.
+ * @param aIsProcessedByIME true if aNativeKeyEvent has been handled
+ * by IME (but except if the composition was
+ * started with dead key).
+ * @param aInsertString If caller expects that the event will cause
+ * a character to be input (say in an editor),
+ * the caller should set this. Otherwise,
+ * if caller sets null to this, this method will
+ * compute the character to be input from
+ * characters of aNativeKeyEvent.
+ */
+ void InitKeyEvent(NSEvent* aNativeKeyEvent, WidgetKeyboardEvent& aKeyEvent,
+ bool aIsProcessedByIME,
+ const nsAString* aInsertString = nullptr);
+
+ /**
+ * SynthesizeNativeKeyEvent() is an implementation of
+ * nsIWidget::SynthesizeNativeKeyEvent(). See the document in nsIWidget.h
+ * for the detail.
+ */
+ nsresult SynthesizeNativeKeyEvent(int32_t aNativeKeyboardLayout,
+ int32_t aNativeKeyCode,
+ uint32_t aModifierFlags,
+ const nsAString& aCharacters,
+ const nsAString& aUnmodifiedCharacters);
+
+ /**
+ * Utility method intended for testing. Attempts to construct a native key
+ * event that would have been generated during an actual key press. This
+ * *does not dispatch* the native event. Instead, it is attached to the
+ * |mNativeKeyEvent| field of the Gecko event that is passed in.
+ * @param aKeyEvent Gecko key event to attach the native event to
+ */
+ NS_IMETHOD AttachNativeKeyEvent(WidgetKeyboardEvent& aKeyEvent);
+
+ /**
+ * GetWindowLevel() returns the window level of current focused (in Gecko)
+ * window. E.g., if an <input> element in XUL panel has focus, this returns
+ * the XUL panel's window level.
+ */
+ NSInteger GetWindowLevel();
+
+ /**
+ * IsSpecialGeckoKey() checks whether aNativeKeyCode is mapped to a special
+ * Gecko keyCode. A key is "special" if it isn't used for text input.
+ *
+ * @param aNativeKeyCode A native keycode.
+ * @return If the keycode is mapped to a special key,
+ * TRUE. Otherwise, FALSE.
+ */
+ static bool IsSpecialGeckoKey(UInt32 aNativeKeyCode);
+
+ /**
+ * EnableSecureEventInput() and DisableSecureEventInput() wrap the Carbon
+ * Event Manager APIs with the same names. In addition they keep track of
+ * how many times we've called them (in the same process) -- unlike the
+ * Carbon Event Manager APIs, which only keep track of how many times they've
+ * been called from any and all processes.
+ *
+ * The Carbon Event Manager's IsSecureEventInputEnabled() returns whether
+ * secure event input mode is enabled (in any process). This class's
+ * IsSecureEventInputEnabled() returns whether we've made any calls to
+ * EnableSecureEventInput() that are not (yet) offset by the calls we've
+ * made to DisableSecureEventInput().
+ */
+ static void EnableSecureEventInput();
+ static void DisableSecureEventInput();
+ static bool IsSecureEventInputEnabled();
+
+ /**
+ * EnsureSecureEventInputDisabled() calls DisableSecureEventInput() until
+ * our call count becomes 0.
+ */
+ static void EnsureSecureEventInputDisabled();
+
+ public:
+ /**
+ * mWidget must not be destroyed without OnDestroyWidget being called.
+ *
+ * @param aDestroyingWidget Destroying widget. This might not be mWidget.
+ * @return This result doesn't have any meaning for
+ * callers. When aDstroyingWidget isn't the same
+ * as mWidget, FALSE. Then, inherited methods in
+ * sub classes should return from this method
+ * without cleaning up.
+ */
+ virtual bool OnDestroyWidget(nsChildView* aDestroyingWidget);
+
+ protected:
+ // The creator of this instance, client and its text event dispatcher.
+ // These members must not be nullptr after initialized until
+ // OnDestroyWidget() is called.
+ nsChildView* mWidget; // [WEAK]
+ RefPtr<TextEventDispatcher> mDispatcher;
+
+ // The native view for mWidget.
+ // This view handles the actual text inputting.
+ NSView<mozView>* mView; // [STRONG]
+
+ TextInputHandlerBase(nsChildView* aWidget, NSView<mozView>* aNativeView);
+ virtual ~TextInputHandlerBase();
+
+ bool Destroyed() { return !mWidget; }
+
+ /**
+ * mCurrentKeyEvent indicates what key event we are handling. While
+ * handling a native keydown event, we need to store the event for insertText,
+ * doCommandBySelector and various action message handlers of NSResponder
+ * such as [NSResponder insertNewline:sender].
+ */
+ struct KeyEventState {
+ // Handling native key event
+ NSEvent* mKeyEvent;
+ // String specified by InsertText(). This is not null only during a
+ // call of InsertText().
+ nsAString* mInsertString;
+ // String which are included in [mKeyEvent characters] and already handled
+ // by InsertText() call(s).
+ nsString mInsertedString;
+ // Unique id associated with a keydown / keypress event. It's ok if this
+ // wraps over long periods.
+ uint32_t mUniqueId;
+ // Whether keydown event was dispatched for mKeyEvent.
+ bool mKeyDownDispatched;
+ // Whether keydown event was consumed by web contents or chrome contents.
+ bool mKeyDownHandled;
+ // Whether keypress event was dispatched for mKeyEvent.
+ bool mKeyPressDispatched;
+ // Whether keypress event was consumed by web contents or chrome contents.
+ bool mKeyPressHandled;
+ // Whether the key event causes other key events via IME or something.
+ bool mCausedOtherKeyEvents;
+ // Whether the key event causes composition change or committing
+ // composition. So, even if InsertText() is called, this may be false
+ // if it dispatches keypress event.
+ bool mCompositionDispatched;
+
+ KeyEventState() : mKeyEvent(nullptr), mUniqueId(0) { Clear(); }
+
+ explicit KeyEventState(NSEvent* aNativeKeyEvent, uint32_t aUniqueId = 0)
+ : mKeyEvent(nullptr), mUniqueId(0) {
+ Clear();
+ Set(aNativeKeyEvent, aUniqueId);
+ }
+
+ KeyEventState(const KeyEventState& aOther) = delete;
+
+ ~KeyEventState() { Clear(); }
+
+ void Set(NSEvent* aNativeKeyEvent, uint32_t aUniqueId = 0) {
+ MOZ_ASSERT(aNativeKeyEvent, "aNativeKeyEvent must not be NULL");
+ Clear();
+ mKeyEvent = [aNativeKeyEvent retain];
+ mUniqueId = aUniqueId;
+ }
+
+ void Clear() {
+ if (mKeyEvent) {
+ [mKeyEvent release];
+ mKeyEvent = nullptr;
+ mUniqueId = 0;
+ }
+ mInsertString = nullptr;
+ mInsertedString.Truncate();
+ mKeyDownDispatched = false;
+ mKeyDownHandled = false;
+ mKeyPressDispatched = false;
+ mKeyPressHandled = false;
+ mCausedOtherKeyEvents = false;
+ mCompositionDispatched = false;
+ }
+
+ bool IsDefaultPrevented() const {
+ return mKeyDownHandled || mKeyPressHandled || mCausedOtherKeyEvents ||
+ mCompositionDispatched;
+ }
+
+ bool CanDispatchKeyDownEvent() const { return !mKeyDownDispatched; }
+
+ bool CanDispatchKeyPressEvent() const {
+ return !mKeyPressDispatched && !IsDefaultPrevented();
+ }
+
+ bool CanHandleCommand() const {
+ return !mKeyDownHandled && !mKeyPressHandled;
+ }
+
+ bool IsProperKeyEvent(Command aCommand) const {
+ if (NS_WARN_IF(!mKeyEvent)) {
+ return false;
+ }
+ KeyNameIndex keyNameIndex =
+ TISInputSourceWrapper::ComputeGeckoKeyNameIndex([mKeyEvent keyCode]);
+ Modifiers modifiers =
+ nsCocoaUtils::ModifiersForEvent(mKeyEvent) &
+ (MODIFIER_SHIFT | MODIFIER_CONTROL | MODIFIER_ALT | MODIFIER_META);
+ switch (aCommand) {
+ case Command::InsertLineBreak:
+ return keyNameIndex == KEY_NAME_INDEX_Enter &&
+ modifiers == MODIFIER_CONTROL;
+ case Command::InsertParagraph:
+ return keyNameIndex == KEY_NAME_INDEX_Enter &&
+ modifiers == MODIFIER_NONE;
+ case Command::DeleteCharBackward:
+ return keyNameIndex == KEY_NAME_INDEX_Backspace &&
+ modifiers == MODIFIER_NONE;
+ case Command::DeleteToBeginningOfLine:
+ return keyNameIndex == KEY_NAME_INDEX_Backspace &&
+ modifiers == MODIFIER_META;
+ case Command::DeleteWordBackward:
+ return keyNameIndex == KEY_NAME_INDEX_Backspace &&
+ modifiers == MODIFIER_ALT;
+ case Command::DeleteCharForward:
+ return keyNameIndex == KEY_NAME_INDEX_Delete &&
+ modifiers == MODIFIER_NONE;
+ case Command::DeleteWordForward:
+ return keyNameIndex == KEY_NAME_INDEX_Delete &&
+ modifiers == MODIFIER_ALT;
+ case Command::InsertTab:
+ return keyNameIndex == KEY_NAME_INDEX_Tab &&
+ modifiers == MODIFIER_NONE;
+ case Command::InsertBacktab:
+ return keyNameIndex == KEY_NAME_INDEX_Tab &&
+ modifiers == MODIFIER_SHIFT;
+ case Command::CharNext:
+ return keyNameIndex == KEY_NAME_INDEX_ArrowRight &&
+ modifiers == MODIFIER_NONE;
+ case Command::SelectCharNext:
+ return keyNameIndex == KEY_NAME_INDEX_ArrowRight &&
+ modifiers == MODIFIER_SHIFT;
+ case Command::WordNext:
+ return keyNameIndex == KEY_NAME_INDEX_ArrowRight &&
+ modifiers == MODIFIER_ALT;
+ case Command::SelectWordNext:
+ return keyNameIndex == KEY_NAME_INDEX_ArrowRight &&
+ modifiers == (MODIFIER_ALT | MODIFIER_SHIFT);
+ case Command::EndLine:
+ return keyNameIndex == KEY_NAME_INDEX_ArrowRight &&
+ modifiers == MODIFIER_META;
+ case Command::SelectEndLine:
+ return keyNameIndex == KEY_NAME_INDEX_ArrowRight &&
+ modifiers == (MODIFIER_META | MODIFIER_SHIFT);
+ case Command::CharPrevious:
+ return keyNameIndex == KEY_NAME_INDEX_ArrowLeft &&
+ modifiers == MODIFIER_NONE;
+ case Command::SelectCharPrevious:
+ return keyNameIndex == KEY_NAME_INDEX_ArrowLeft &&
+ modifiers == MODIFIER_SHIFT;
+ case Command::WordPrevious:
+ return keyNameIndex == KEY_NAME_INDEX_ArrowLeft &&
+ modifiers == MODIFIER_ALT;
+ case Command::SelectWordPrevious:
+ return keyNameIndex == KEY_NAME_INDEX_ArrowLeft &&
+ modifiers == (MODIFIER_ALT | MODIFIER_SHIFT);
+ case Command::BeginLine:
+ return keyNameIndex == KEY_NAME_INDEX_ArrowLeft &&
+ modifiers == MODIFIER_META;
+ case Command::SelectBeginLine:
+ return keyNameIndex == KEY_NAME_INDEX_ArrowLeft &&
+ modifiers == (MODIFIER_META | MODIFIER_SHIFT);
+ case Command::LinePrevious:
+ return keyNameIndex == KEY_NAME_INDEX_ArrowUp &&
+ modifiers == MODIFIER_NONE;
+ case Command::SelectLinePrevious:
+ return keyNameIndex == KEY_NAME_INDEX_ArrowUp &&
+ modifiers == MODIFIER_SHIFT;
+ case Command::MoveTop:
+ return keyNameIndex == KEY_NAME_INDEX_ArrowUp &&
+ modifiers == MODIFIER_META;
+ case Command::SelectTop:
+ return (keyNameIndex == KEY_NAME_INDEX_ArrowUp &&
+ modifiers == (MODIFIER_META | MODIFIER_SHIFT)) ||
+ (keyNameIndex == KEY_NAME_INDEX_Home &&
+ modifiers == MODIFIER_SHIFT);
+ case Command::LineNext:
+ return keyNameIndex == KEY_NAME_INDEX_ArrowDown &&
+ modifiers == MODIFIER_NONE;
+ case Command::SelectLineNext:
+ return keyNameIndex == KEY_NAME_INDEX_ArrowDown &&
+ modifiers == MODIFIER_SHIFT;
+ case Command::MoveBottom:
+ return keyNameIndex == KEY_NAME_INDEX_ArrowDown &&
+ modifiers == MODIFIER_META;
+ case Command::SelectBottom:
+ return (keyNameIndex == KEY_NAME_INDEX_ArrowDown &&
+ modifiers == (MODIFIER_META | MODIFIER_SHIFT)) ||
+ (keyNameIndex == KEY_NAME_INDEX_End &&
+ modifiers == MODIFIER_SHIFT);
+ case Command::ScrollPageUp:
+ return keyNameIndex == KEY_NAME_INDEX_PageUp &&
+ modifiers == MODIFIER_NONE;
+ case Command::SelectPageUp:
+ return keyNameIndex == KEY_NAME_INDEX_PageUp &&
+ modifiers == MODIFIER_SHIFT;
+ case Command::ScrollPageDown:
+ return keyNameIndex == KEY_NAME_INDEX_PageDown &&
+ modifiers == MODIFIER_NONE;
+ case Command::SelectPageDown:
+ return keyNameIndex == KEY_NAME_INDEX_PageDown &&
+ modifiers == MODIFIER_SHIFT;
+ case Command::ScrollBottom:
+ return keyNameIndex == KEY_NAME_INDEX_End &&
+ modifiers == MODIFIER_NONE;
+ case Command::ScrollTop:
+ return keyNameIndex == KEY_NAME_INDEX_Home &&
+ modifiers == MODIFIER_NONE;
+ case Command::CancelOperation:
+ return (keyNameIndex == KEY_NAME_INDEX_Escape &&
+ (modifiers == MODIFIER_NONE ||
+ modifiers == MODIFIER_SHIFT)) ||
+ ([mKeyEvent keyCode] == kVK_ANSI_Period &&
+ modifiers == MODIFIER_META);
+ case Command::Complete:
+ return keyNameIndex == KEY_NAME_INDEX_Escape &&
+ (modifiers == MODIFIER_ALT ||
+ modifiers == (MODIFIER_ALT | MODIFIER_SHIFT));
+ default:
+ return false;
+ }
+ }
+
+ void InitKeyEvent(TextInputHandlerBase* aHandler,
+ WidgetKeyboardEvent& aKeyEvent, bool aIsProcessedByIME);
+
+ /**
+ * GetUnhandledString() returns characters of the event which have not been
+ * handled with InsertText() yet. For example, if there is a composition
+ * caused by a dead key press like '`' and it's committed by some key
+ * combinations like |Cmd+v|, then, the |v|'s KeyDown event's |characters|
+ * is |`v|. Then, after |`| is committed with a call of InsertString(),
+ * this returns only 'v'.
+ */
+ void GetUnhandledString(nsAString& aUnhandledString) const;
+ };
+
+ /**
+ * Helper classes for guaranteeing cleaning mCurrentKeyEvent
+ */
+ class AutoKeyEventStateCleaner {
+ public:
+ explicit AutoKeyEventStateCleaner(TextInputHandlerBase* aHandler)
+ : mHandler(aHandler) {}
+
+ ~AutoKeyEventStateCleaner() { mHandler->RemoveCurrentKeyEvent(); }
+
+ private:
+ RefPtr<TextInputHandlerBase> mHandler;
+ };
+
+ class MOZ_STACK_CLASS AutoInsertStringClearer {
+ public:
+ explicit AutoInsertStringClearer(KeyEventState* aState) : mState(aState) {}
+ ~AutoInsertStringClearer();
+
+ private:
+ KeyEventState* mState;
+ };
+
+ /**
+ * mCurrentKeyEvents stores all key events which are being processed.
+ * When we call interpretKeyEvents, IME may generate other key events.
+ * mCurrentKeyEvents[0] is the latest key event.
+ */
+ nsTArray<KeyEventState*> mCurrentKeyEvents;
+
+ /**
+ * mFirstKeyEvent must be used for first key event. This member prevents
+ * memory fragmentation for most key events.
+ */
+ KeyEventState mFirstKeyEvent;
+
+ /**
+ * PushKeyEvent() adds the current key event to mCurrentKeyEvents.
+ */
+ KeyEventState* PushKeyEvent(NSEvent* aNativeKeyEvent,
+ uint32_t aUniqueId = 0) {
+ uint32_t nestCount = mCurrentKeyEvents.Length();
+ for (uint32_t i = 0; i < nestCount; i++) {
+ // When the key event is caused by another key event, all key events
+ // which are being handled should be marked as "consumed".
+ mCurrentKeyEvents[i]->mCausedOtherKeyEvents = true;
+ }
+
+ KeyEventState* keyEvent = nullptr;
+ if (nestCount == 0) {
+ mFirstKeyEvent.Set(aNativeKeyEvent, aUniqueId);
+ keyEvent = &mFirstKeyEvent;
+ } else {
+ keyEvent = new KeyEventState(aNativeKeyEvent, aUniqueId);
+ }
+ return *mCurrentKeyEvents.AppendElement(keyEvent);
+ }
+
+ /**
+ * RemoveCurrentKeyEvent() removes the current key event from
+ * mCurrentKeyEvents.
+ */
+ void RemoveCurrentKeyEvent() {
+ NS_ASSERTION(mCurrentKeyEvents.Length() > 0,
+ "RemoveCurrentKeyEvent() is called unexpectedly");
+ KeyEventState* keyEvent = mCurrentKeyEvents.PopLastElement();
+ if (keyEvent == &mFirstKeyEvent) {
+ keyEvent->Clear();
+ } else {
+ delete keyEvent;
+ }
+ }
+
+ /**
+ * GetCurrentKeyEvent() returns current processing key event.
+ */
+ KeyEventState* GetCurrentKeyEvent() {
+ if (mCurrentKeyEvents.Length() == 0) {
+ return nullptr;
+ }
+ return mCurrentKeyEvents[mCurrentKeyEvents.Length() - 1];
+ }
+
+ struct KeyboardLayoutOverride final {
+ int32_t mKeyboardLayout;
+ bool mOverrideEnabled;
+
+ KeyboardLayoutOverride() : mKeyboardLayout(0), mOverrideEnabled(false) {}
+ };
+
+ const KeyboardLayoutOverride& KeyboardLayoutOverrideRef() const {
+ return mKeyboardOverride;
+ }
+
+ /**
+ * IsPrintableChar() checks whether the unicode character is
+ * a non-printable ASCII character or not. Note that this returns
+ * TRUE even if aChar is a non-printable UNICODE character.
+ *
+ * @param aChar A unicode character.
+ * @return TRUE if aChar is a printable ASCII character
+ * or a unicode character. Otherwise, i.e,
+ * if aChar is a non-printable ASCII character,
+ * FALSE.
+ */
+ static bool IsPrintableChar(char16_t aChar);
+
+ /**
+ * IsNormalCharInputtingEvent() checks whether aNativeEvent causes text input.
+ *
+ * @param aNativeEvent A key event.
+ * @return TRUE if the key event causes text input.
+ * Otherwise, FALSE.
+ */
+ static bool IsNormalCharInputtingEvent(NSEvent* aNativeEvent);
+
+ /**
+ * IsModifierKey() checks whether the native keyCode is for a modifier key.
+ *
+ * @param aNativeKeyCode A native keyCode.
+ * @return TRUE if aNativeKeyCode is for a modifier key.
+ * Otherwise, FALSE.
+ */
+ static bool IsModifierKey(UInt32 aNativeKeyCode);
+
+ private:
+ KeyboardLayoutOverride mKeyboardOverride;
+
+ static int32_t sSecureEventInputCount;
+};
+
+/**
+ * IMEInputHandler manages:
+ * 1. The IME/keyboard layout statement of nsChildView.
+ * 2. The IME composition statement of nsChildView.
+ * And also provides the methods which controls the current IME transaction of
+ * the instance.
+ *
+ * Note that an nsChildView handles one or more NSView's events. E.g., even if
+ * a text editor on XUL panel element, the input events handled on the parent
+ * (or its ancestor) widget handles it (the native focus is set to it). The
+ * actual focused view is notified by OnFocusChangeInGecko.
+ */
+
+class IMEInputHandler : public TextInputHandlerBase {
+ public:
+ // TextEventDispatcherListener methods
+ NS_IMETHOD NotifyIME(TextEventDispatcher* aTextEventDispatcher,
+ const IMENotification& aNotification) override;
+ NS_IMETHOD_(IMENotificationRequests) GetIMENotificationRequests() override;
+ NS_IMETHOD_(void)
+ OnRemovedFrom(TextEventDispatcher* aTextEventDispatcher) override;
+ NS_IMETHOD_(void)
+ WillDispatchKeyboardEvent(TextEventDispatcher* aTextEventDispatcher,
+ WidgetKeyboardEvent& aKeyboardEvent,
+ uint32_t aIndexOfKeypress, void* aData) override;
+
+ public:
+ virtual bool OnDestroyWidget(nsChildView* aDestroyingWidget) override;
+
+ virtual void OnFocusChangeInGecko(bool aFocus);
+
+ void OnSelectionChange(const IMENotification& aIMENotification);
+ void OnLayoutChange();
+
+ /**
+ * Call [NSTextInputContext handleEvent] for mouse event support of IME
+ */
+ bool OnHandleEvent(NSEvent* aEvent);
+
+ /**
+ * SetMarkedText() is a handler of setMarkedText of NSTextInput.
+ *
+ * @param aAttrString This mut be an instance of NSAttributedString.
+ * If the aString parameter to
+ * [ChildView setMarkedText:setSelectedRange:]
+ * isn't an instance of NSAttributedString,
+ * create an NSAttributedString from it and pass
+ * that instead.
+ * @param aSelectedRange Current selected range (or caret position).
+ * @param aReplacementRange The range which will be replaced with the
+ * aAttrString instead of current marked range.
+ */
+ void SetMarkedText(NSAttributedString* aAttrString, NSRange& aSelectedRange,
+ NSRange* aReplacementRange = nullptr);
+
+ /**
+ * GetAttributedSubstringFromRange() returns an NSAttributedString instance
+ * which is allocated as autorelease for aRange.
+ *
+ * @param aRange The range of string which you want.
+ * @param aActualRange The actual range of the result.
+ * @return The string in aRange. If the string is empty,
+ * this returns nil. If succeeded, this returns
+ * an instance which is allocated as autorelease.
+ * If this has some troubles, returns nil.
+ */
+ NSAttributedString* GetAttributedSubstringFromRange(
+ NSRange& aRange, NSRange* aActualRange = nullptr);
+
+ /**
+ * SelectedRange() returns current selected range.
+ *
+ * @return If an editor has focus, this returns selection
+ * range in the editor. Otherwise, this returns
+ * selection range in the focused document.
+ */
+ NSRange SelectedRange();
+
+ /**
+ * DrawsVerticallyForCharacterAtIndex() returns whether the character at
+ * the given index is being rendered vertically.
+ *
+ * @param aCharIndex The character offset to query.
+ *
+ * @return True if writing-mode is vertical at the given
+ * character offset; otherwise false.
+ */
+ bool DrawsVerticallyForCharacterAtIndex(uint32_t aCharIndex);
+
+ /**
+ * FirstRectForCharacterRange() returns first *character* rect in the range.
+ * Cocoa needs the first line rect in the range, but we cannot compute it
+ * on current implementation.
+ *
+ * @param aRange A range of text to examine. Its position is
+ * an offset from the beginning of the focused
+ * editor or document.
+ * @param aActualRange If this is not null, this returns the actual
+ * range used for computing the result.
+ * @return An NSRect containing the first character in
+ * aRange, in screen coordinates.
+ * If the length of aRange is 0, the width will
+ * be 0.
+ */
+ NSRect FirstRectForCharacterRange(NSRange& aRange,
+ NSRange* aActualRange = nullptr);
+
+ /**
+ * CharacterIndexForPoint() returns an offset of a character at aPoint.
+ * XXX This isn't implemented, always returns 0.
+ *
+ * @param The point in screen coordinates.
+ * @return The offset of the character at aPoint from
+ * the beginning of the focused editor or
+ * document.
+ */
+ NSUInteger CharacterIndexForPoint(NSPoint& aPoint);
+
+ /**
+ * GetValidAttributesForMarkedText() returns attributes which we support.
+ *
+ * @return Always empty array for now.
+ */
+ NSArray* GetValidAttributesForMarkedText();
+
+ bool HasMarkedText();
+ NSRange MarkedRange();
+
+ bool IsIMEComposing() { return mIsIMEComposing; }
+ bool IsDeadKeyComposing() { return mIsDeadKeyComposing; }
+ bool IsIMEOpened();
+ bool IsIMEEnabled() { return mIsIMEEnabled; }
+ bool IsASCIICapableOnly() { return mIsASCIICapableOnly; }
+ bool IsEditableContent() const {
+ return mIsIMEEnabled || mIsASCIICapableOnly;
+ }
+ bool IgnoreIMECommit() { return mIgnoreIMECommit; }
+
+ void CommitIMEComposition();
+ void CancelIMEComposition();
+
+ void EnableIME(bool aEnableIME);
+ void SetIMEOpenState(bool aOpen);
+ void SetASCIICapableOnly(bool aASCIICapableOnly);
+
+ /**
+ * True if OSX believes that our view has keyboard focus.
+ */
+ bool IsFocused();
+
+ static CFArrayRef CreateAllIMEModeList();
+ static void DebugPrintAllIMEModes();
+
+ // Don't use ::TSMGetActiveDocument() API directly, the document may not
+ // be what you want.
+ static TSMDocumentID GetCurrentTSMDocumentID();
+
+ protected:
+ // We cannot do some jobs in the given stack by some reasons.
+ // Following flags and the timer provide the execution pending mechanism,
+ // See the comment in nsCocoaTextInputHandler.mm.
+ nsCOMPtr<nsITimer> mTimer;
+ enum { kNotifyIMEOfFocusChangeInGecko = 1, kSyncASCIICapableOnly = 2 };
+ uint32_t mPendingMethods;
+
+ IMEInputHandler(nsChildView* aWidget, NSView<mozView>* aNativeView);
+ virtual ~IMEInputHandler();
+
+ void ResetTimer();
+
+ virtual void ExecutePendingMethods();
+
+ /**
+ * InsertTextAsCommittingComposition() commits current composition. If there
+ * is no composition, this starts a composition and commits it immediately.
+ *
+ * @param aString A string which is committed.
+ * @param aReplacementRange The range which will be replaced with the
+ * aAttrString instead of current selection.
+ */
+ void InsertTextAsCommittingComposition(NSString* aString,
+ NSRange* aReplacementRange);
+
+ /**
+ * MaybeDispatchCurrentKeydownEvent() dispatches eKeyDown event for current
+ * key event. If eKeyDown for current key event has already been dispatched,
+ * this does nothing.
+ *
+ * @param aIsProcessedByIME true if current key event is handled by IME.
+ * @return true if the caller can continue to handle
+ * current key event. Otherwise, false. E.g.,
+ * focus is moved, the widget has been destroyed
+ * or something.
+ */
+ bool MaybeDispatchCurrentKeydownEvent(bool aIsProcessedByIME);
+
+ private:
+ // If mIsIMEComposing is true, the composition string is stored here.
+ NSString* mIMECompositionString;
+ // If mIsIMEComposing is true, the start offset of the composition string.
+ uint32_t mIMECompositionStart;
+
+ NSRange mMarkedRange;
+ NSRange mSelectedRange;
+
+ NSRange mRangeForWritingMode; // range within which mWritingMode applies
+ mozilla::WritingMode mWritingMode;
+
+ bool mIsIMEComposing;
+ // If the composition started with dead key, mIsDeadKeyComposing is set to
+ // true.
+ bool mIsDeadKeyComposing;
+ bool mIsIMEEnabled;
+ bool mIsASCIICapableOnly;
+ bool mIgnoreIMECommit;
+ bool mIMEHasFocus;
+
+ void KillIMEComposition();
+ void SendCommittedText(NSString* aString);
+ void OpenSystemPreferredLanguageIME();
+
+ // Pending methods
+ void NotifyIMEOfFocusChangeInGecko();
+ void SyncASCIICapableOnly();
+
+ static bool sStaticMembersInitialized;
+ static CFStringRef sLatestIMEOpenedModeInputSourceID;
+ static void InitStaticMembers();
+ static void OnCurrentTextInputSourceChange(CFNotificationCenterRef aCenter,
+ void* aObserver, CFStringRef aName,
+ const void* aObject,
+ CFDictionaryRef aUserInfo);
+
+ static void FlushPendingMethods(nsITimer* aTimer, void* aClosure);
+
+ /**
+ * ConvertToTextRangeStyle converts the given native underline style to
+ * our defined text range type.
+ *
+ * @param aUnderlineStyle NSUnderlineStyleSingle or
+ * NSUnderlineStyleThick.
+ * @param aSelectedRange Current selected range (or caret position).
+ * @return NS_TEXTRANGE_*.
+ */
+ TextRangeType ConvertToTextRangeType(uint32_t aUnderlineStyle,
+ NSRange& aSelectedRange);
+
+ /**
+ * GetRangeCount() computes the range count of aAttrString.
+ *
+ * @param aAttrString An NSAttributedString instance whose number of
+ * NSUnderlineStyleAttributeName ranges you with
+ * to know.
+ * @return The count of NSUnderlineStyleAttributeName
+ * ranges in aAttrString.
+ */
+ uint32_t GetRangeCount(NSAttributedString* aString);
+
+ /**
+ * CreateTextRangeArray() returns text ranges for clauses and/or caret.
+ *
+ * @param aAttrString An NSAttributedString instance which indicates
+ * current composition string.
+ * @param aSelectedRange Current selected range (or caret position).
+ * @return The result is set to the
+ * NSUnderlineStyleAttributeName ranges in
+ * aAttrString.
+ */
+ already_AddRefed<mozilla::TextRangeArray> CreateTextRangeArray(
+ NSAttributedString* aAttrString, NSRange& aSelectedRange);
+
+ /**
+ * DispatchCompositionStartEvent() dispatches a compositionstart event and
+ * initializes the members indicating composition state.
+ *
+ * @return true if it can continues handling composition.
+ * Otherwise, e.g., canceled by the web page,
+ * this returns false.
+ */
+ bool DispatchCompositionStartEvent();
+
+ /**
+ * DispatchCompositionChangeEvent() dispatches a compositionchange event on
+ * mWidget and modifies the members indicating composition state.
+ *
+ * @param aText User text input.
+ * @param aAttrString An NSAttributedString instance which indicates
+ * current composition string.
+ * @param aSelectedRange Current selected range (or caret position).
+ *
+ * @return true if it can continues handling composition.
+ * Otherwise, e.g., canceled by the web page,
+ * this returns false.
+ */
+ bool DispatchCompositionChangeEvent(const nsString& aText,
+ NSAttributedString* aAttrString,
+ NSRange& aSelectedRange);
+
+ /**
+ * DispatchCompositionCommitEvent() dispatches a compositioncommit event or
+ * compositioncommitasis event. If aCommitString is null, dispatches
+ * compositioncommitasis event. I.e., if aCommitString is null, this
+ * commits the composition with the last data. Otherwise, commits the
+ * composition with aCommitString value.
+ *
+ * @return true if the widget isn't destroyed.
+ * Otherwise, false.
+ */
+ bool DispatchCompositionCommitEvent(const nsAString* aCommitString = nullptr);
+
+ // The focused IME handler. Please note that the handler might lost the
+ // actual focus by deactivating the application. If we are active, this
+ // must have the actual focused handle.
+ // We cannot access to the NSInputManager during we aren't active, so, the
+ // focused handler can have an IME transaction even if we are deactive.
+ static IMEInputHandler* sFocusedIMEHandler;
+
+ static bool sCachedIsForRTLLangage;
+};
+
+/**
+ * TextInputHandler implements the NSTextInput protocol.
+ */
+class TextInputHandler : public IMEInputHandler {
+ public:
+ static NSUInteger sLastModifierState;
+
+ static CFArrayRef CreateAllKeyboardLayoutList();
+ static void DebugPrintAllKeyboardLayouts();
+
+ TextInputHandler(nsChildView* aWidget, NSView<mozView>* aNativeView);
+ virtual ~TextInputHandler();
+
+ /**
+ * KeyDown event handler.
+ *
+ * @param aNativeEvent A native NSEventTypeKeyDown event.
+ * @param aUniqueId A unique ID for the event.
+ * @return TRUE if the event is dispatched to web
+ * contents or chrome contents. Otherwise, FALSE.
+ */
+ bool HandleKeyDownEvent(NSEvent* aNativeEvent, uint32_t aUniqueId);
+
+ /**
+ * KeyUp event handler.
+ *
+ * @param aNativeEvent A native NSEventTypeKeyUp event.
+ */
+ void HandleKeyUpEvent(NSEvent* aNativeEvent);
+
+ /**
+ * FlagsChanged event handler.
+ *
+ * @param aNativeEvent A native NSEventTypeFlagsChanged event.
+ */
+ void HandleFlagsChanged(NSEvent* aNativeEvent);
+
+ /**
+ * Insert the string to content. I.e., this is a text input event handler.
+ * If this is called during keydown event handling, this may dispatch a
+ * eKeyPress event. If this is called during composition, this commits
+ * the composition by the aAttrString.
+ *
+ * @param aString An inserted string.
+ * @param aReplacementRange The range which will be replaced with the
+ * aAttrString instead of current selection.
+ */
+ void InsertText(NSString* aString, NSRange* aReplacementRange = nullptr);
+
+ /**
+ * Handles aCommand. This may cause dispatching an eKeyPress event.
+ *
+ * @param aCommand The command which receives from Cocoa.
+ * @return true if this handles the command even if it does
+ * nothing actually. Otherwise, false.
+ */
+ bool HandleCommand(Command aCommand);
+
+ /**
+ * doCommandBySelector event handler.
+ *
+ * @param aSelector A selector of the command.
+ * @return TRUE if the command is consumed. Otherwise,
+ * FALSE.
+ */
+ bool DoCommandBySelector(const char* aSelector);
+
+ /**
+ * KeyPressWasHandled() checks whether keypress event was handled or not.
+ *
+ * @return TRUE if keypress event for latest native key
+ * event was handled. Otherwise, FALSE.
+ * If this handler isn't handling any key events,
+ * always returns FALSE.
+ */
+ bool KeyPressWasHandled() {
+ KeyEventState* currentKeyEvent = GetCurrentKeyEvent();
+ return currentKeyEvent && currentKeyEvent->mKeyPressHandled;
+ }
+
+ protected:
+ // Stores the association of device dependent modifier flags with a modifier
+ // keyCode. Being device dependent, this association may differ from one kind
+ // of hardware to the next.
+ struct ModifierKey {
+ NSUInteger flags;
+ unsigned short keyCode;
+
+ ModifierKey(NSUInteger aFlags, unsigned short aKeyCode)
+ : flags(aFlags), keyCode(aKeyCode) {}
+
+ NSUInteger GetDeviceDependentFlags() const {
+ return (flags & ~NSEventModifierFlagDeviceIndependentFlagsMask);
+ }
+
+ NSUInteger GetDeviceIndependentFlags() const {
+ return (flags & NSEventModifierFlagDeviceIndependentFlagsMask);
+ }
+ };
+ typedef nsTArray<ModifierKey> ModifierKeyArray;
+ ModifierKeyArray mModifierKeys;
+
+ /**
+ * GetModifierKeyForNativeKeyCode() returns the stored ModifierKey for
+ * the key.
+ */
+ const ModifierKey* GetModifierKeyForNativeKeyCode(
+ unsigned short aKeyCode) const;
+
+ /**
+ * GetModifierKeyForDeviceDependentFlags() returns the stored ModifierKey for
+ * the device dependent flags.
+ */
+ const ModifierKey* GetModifierKeyForDeviceDependentFlags(
+ NSUInteger aFlags) const;
+
+ /**
+ * DispatchKeyEventForFlagsChanged() dispatches keydown event or keyup event
+ * for the aNativeEvent.
+ *
+ * @param aNativeEvent A native flagschanged event which you want to
+ * dispatch our key event for.
+ * @param aDispatchKeyDown TRUE if you want to dispatch a keydown event.
+ * Otherwise, i.e., to dispatch keyup event,
+ * FALSE.
+ */
+ void DispatchKeyEventForFlagsChanged(NSEvent* aNativeEvent,
+ bool aDispatchKeyDown);
+};
+
+} // namespace widget
+} // namespace mozilla
+
+#endif // TextInputHandler_h_