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gecko-dev/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 "npapi.h"
#include "nsTArray.h"
#include "nsEvent.h"
class nsChildView;
struct nsTextRange;
namespace mozilla {
namespace widget {
// Key code constants
enum
{
kVK_RightCommand = 0x36, // right command key
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_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& CurrentKeyboardLayout();
TISInputSourceWrapper()
{
mInputSourceList = nsnull;
Clear();
}
TISInputSourceWrapper(const char* aID)
{
mInputSourceList = nsnull;
InitByInputSourceID(aID);
}
TISInputSourceWrapper(SInt32 aLayoutID)
{
mInputSourceList = nsnull;
InitByLayoutID(aLayoutID);
}
TISInputSourceWrapper(TISInputSourceRef aInputSource)
{
mInputSourceList = nsnull;
InitByTISInputSourceRef(aInputSource);
}
~TISInputSourceWrapper() { Clear(); }
void InitByInputSourceID(const char* aID);
void InitByInputSourceID(const nsAFlatString &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
* @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 InitByTISInputSourceRef(TISInputSourceRef aInputSource);
void InitByLanguage(CFStringRef aLanguage);
const UCKeyboardLayout* GetUCKeyboardLayout();
bool IsOpenedIMEMode();
bool IsIMEMode();
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 IsInitializedByCurrentKeyboardLayout();
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 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, nsKeyEvent& aKeyEvent,
const nsAString *aInsertString = nsnull);
/**
* 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.
*/
PRUint32 ComputeGeckoKeyCode(UInt32 aNativeKeyCode, UInt32 aKbType,
bool aCmdIsPressed);
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.
*/
PRUint32 TranslateToChar(UInt32 aKeyCode, UInt32 aModifiers, UInt32 aKbType);
/**
* InitKeyPressEvent() initializes aKeyEvent for aNativeKeyEvent.
* Don't call this method when aKeyEvent isn't NS_KEY_PRESS.
*
* @param aNativeKeyEvent A native key event for which you want to
* dispatch a Gecko key event.
* @param aInsertChar A character to be input in an editor by the
* event.
* @param aKeyEvent The result -- a Gecko key event initialized
* from the native key event. This must be
* NS_KEY_PRESS event.
* @param aKbType A native Keyboard Type value. Typically,
* this is a result of ::LMGetKbdType().
*/
void InitKeyPressEvent(NSEvent *aNativeKeyEvent,
PRUnichar aInsertChar,
nsKeyEvent& aKeyEvent,
UInt32 aKbType);
bool GetBoolProperty(const CFStringRef aKey);
bool GetStringProperty(const CFStringRef aKey, CFStringRef &aStr);
bool GetStringProperty(const CFStringRef aKey, nsAString &aStr);
TISInputSourceRef mInputSource;
CFArrayRef mInputSourceList;
const UCKeyboardLayout* mUCKeyboardLayout;
PRInt8 mIsRTL;
bool mOverrideKeyboard;
};
/**
* TextInputHandlerBase is a base class of PluginTextInputHandler,
* IMEInputHandler and TextInputHandler. Utility methods should be implemented
* this level.
*/
class TextInputHandlerBase
{
public:
nsrefcnt AddRef()
{
NS_PRECONDITION(PRInt32(mRefCnt) >= 0, "mRefCnt is negative");
++mRefCnt;
NS_LOG_ADDREF(this, mRefCnt, "TextInputHandlerBase", sizeof(*this));
return mRefCnt;
}
nsrefcnt Release()
{
NS_PRECONDITION(mRefCnt != 0, "mRefCnt is alrady zero");
--mRefCnt;
NS_LOG_RELEASE(this, mRefCnt, "TextInputHandlerBase");
if (mRefCnt == 0) {
mRefCnt = 1; /* stabilize */
delete this;
return 0;
}
return mRefCnt;
}
/**
* 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(nsGUIEvent& aEvent);
/**
* 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 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, nsKeyEvent& aKeyEvent,
const nsAString *aInsertString = nsnull);
/**
* SynthesizeNativeKeyEvent() is an implementation of
* nsIWidget::SynthesizeNativeKeyEvent(). See the document in nsIWidget.h
* for the detail.
*/
nsresult SynthesizeNativeKeyEvent(PRInt32 aNativeKeyboardLayout,
PRInt32 aNativeKeyCode,
PRUint32 aModifierFlags,
const nsAString& aCharacters,
const nsAString& aUnmodifiedCharacters);
/**
* 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);
protected:
nsAutoRefCnt mRefCnt;
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 creater of this instance and client.
// This must not be null after initialized until OnDestroyWidget() is called.
nsChildView* mWidget; // [WEAK]
// 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;
// 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;
KeyEventState() : mKeyEvent(nsnull)
{
Clear();
}
KeyEventState(NSEvent* aNativeKeyEvent) : mKeyEvent(nsnull)
{
Clear();
Set(aNativeKeyEvent);
}
KeyEventState(const KeyEventState &aOther) : mKeyEvent(nsnull)
{
Clear();
if (aOther.mKeyEvent) {
mKeyEvent = [aOther.mKeyEvent retain];
}
mKeyDownHandled = aOther.mKeyDownHandled;
mKeyPressDispatched = aOther.mKeyPressDispatched;
mKeyPressHandled = aOther.mKeyPressHandled;
mCausedOtherKeyEvents = aOther.mCausedOtherKeyEvents;
}
~KeyEventState()
{
Clear();
}
void Set(NSEvent* aNativeKeyEvent)
{
NS_PRECONDITION(aNativeKeyEvent, "aNativeKeyEvent must not be NULL");
Clear();
mKeyEvent = [aNativeKeyEvent retain];
}
void Clear()
{
if (mKeyEvent) {
[mKeyEvent release];
mKeyEvent = nsnull;
}
mKeyDownHandled = false;
mKeyPressDispatched = false;
mKeyPressHandled = false;
mCausedOtherKeyEvents = false;
}
bool KeyDownOrPressHandled()
{
return mKeyDownHandled || mKeyPressHandled;
}
};
/**
* Helper class for guaranteeing cleaning mCurrentKeyEvent
*/
class AutoKeyEventStateCleaner
{
public:
AutoKeyEventStateCleaner(TextInputHandlerBase* aHandler) :
mHandler(aHandler)
{
}
~AutoKeyEventStateCleaner()
{
mHandler->RemoveCurrentKeyEvent();
}
private:
nsRefPtr<TextInputHandlerBase> mHandler;
};
/**
* 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)
{
PRUint32 nestCount = mCurrentKeyEvents.Length();
for (PRUint32 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 = nsnull;
if (nestCount == 0) {
mFirstKeyEvent.Set(aNativeKeyEvent);
keyEvent = &mFirstKeyEvent;
} else {
keyEvent = new KeyEventState(aNativeKeyEvent);
}
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 = GetCurrentKeyEvent();
mCurrentKeyEvents.RemoveElementAt(mCurrentKeyEvents.Length() - 1);
if (keyEvent == &mFirstKeyEvent) {
keyEvent->Clear();
} else {
delete keyEvent;
}
}
/**
* GetCurrentKeyEvent() returns current processing key event.
*/
KeyEventState* GetCurrentKeyEvent()
{
if (mCurrentKeyEvents.Length() == 0) {
return nsnull;
}
return mCurrentKeyEvents[mCurrentKeyEvents.Length() - 1];
}
/**
* 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(PRUnichar aChar);
/**
* IsNormalCharInputtingEvent() checks whether aKeyEvent causes text input.
*
* @param aKeyEvent A key event.
* @return TRUE if the key event causes text input.
* Otherwise, FALSE.
*/
static bool IsNormalCharInputtingEvent(const nsKeyEvent& aKeyEvent);
/**
* 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:
struct KeyboardLayoutOverride {
PRInt32 mKeyboardLayout;
bool mOverrideEnabled;
KeyboardLayoutOverride() :
mKeyboardLayout(0), mOverrideEnabled(false)
{
}
};
KeyboardLayoutOverride mKeyboardOverride;
};
/**
* PluginTextInputHandler handles text input events for plugins.
*/
class PluginTextInputHandler : public TextInputHandlerBase
{
public:
/**
* When starting complex text input for current event on plugin, this is
* called. See also the comment of StartComplexTextInputForCurrentEvent() of
* nsIPluginWidget.
*/
nsresult StartComplexTextInputForCurrentEvent()
{
mPluginComplexTextInputRequested = true;
return NS_OK;
}
/**
* HandleKeyDownEventForPlugin() handles aNativeKeyEvent.
*
* @param aNativeKeyEvent A native NSKeyDown event.
*/
void HandleKeyDownEventForPlugin(NSEvent* aNativeKeyEvent);
/**
* HandleKeyUpEventForPlugin() handles aNativeKeyEvent.
*
* @param aNativeKeyEvent A native NSKeyUp event.
*/
void HandleKeyUpEventForPlugin(NSEvent* aNativeKeyEvent);
/**
* ConvertCocoaKeyEventToNPCocoaEvent() converts aCocoaEvent to NPCocoaEvent.
*
* @param aCocoaEvent A native key event.
* @param aPluginEvent The result.
*/
static void ConvertCocoaKeyEventToNPCocoaEvent(NSEvent* aCocoaEvent,
NPCocoaEvent& aPluginEvent);
#ifndef NP_NO_CARBON
/**
* InstallPluginKeyEventsHandler() is called when initializing process.
* RemovePluginKeyEventsHandler() is called when finalizing process.
* These methods initialize/finalize global resource for handling events for
* plugins.
*/
static void InstallPluginKeyEventsHandler();
static void RemovePluginKeyEventsHandler();
/**
* This must be called before first key/IME event for plugins.
* This method initializes IMKInputSession methods swizzling.
*/
static void SwizzleMethods();
/**
* When a composition starts or finishes, this is called.
*/
void SetPluginTSMInComposition(bool aInComposition)
{
mPluginTSMInComposition = aInComposition;
}
#endif // #ifndef NP_NO_CARBON
protected:
bool mIgnoreNextKeyUpEvent;
PluginTextInputHandler(nsChildView* aWidget, NSView<mozView> *aNativeView);
~PluginTextInputHandler();
#ifndef NP_NO_CARBON
/**
* ConvertCocoaKeyEventToCarbonEvent() converts aCocoaKeyEvent to
* aCarbonKeyEvent.
*
* @param aCocoaKeyEvent A Cocoa key event.
* @param aCarbonKeyEvent Converted Carbon event from aCocoaEvent.
* @param aMakeKeyDownEventIfNSFlagsChanged
* If aCocoaKeyEvent isn't NSFlagsChanged event,
* this is ignored. Otherwise, i.e., if
* aCocoaKeyEvent is NSFlagsChanged event,
* set TRUE if you need a keydown event.
* Otherwise, Set FALSE for a keyup event.
*/
static void ConvertCocoaKeyEventToCarbonEvent(
NSEvent* aCocoaKeyEvent,
EventRecord& aCarbonKeyEvent,
bool aMakeKeyDownEventIfNSFlagsChanged = false);
#endif // #ifndef NP_NO_CARBON
private:
#ifndef NP_NO_CARBON
TSMDocumentID mPluginTSMDoc;
bool mPluginTSMInComposition;
#endif // #ifndef NP_NO_CARBON
bool mPluginComplexTextInputRequested;
/**
* DispatchCocoaNPAPITextEvent() dispatches a text event for Cocoa plugin.
*
* @param aString A string inputted by the dispatching event.
* @return TRUE if the dispatched event was consumed.
* Otherwise, FALSE.
*/
bool DispatchCocoaNPAPITextEvent(NSString* aString);
/**
* Whether the plugin is in composition or not.
* On 32bit build, this returns the state of mPluginTSMInComposition.
* On 64bit build, this returns ComplexTextInputPanel's state.
*
* @return TRUE if plugin is in composition. Otherwise,
* FALSE.
*/
bool IsInPluginComposition();
#ifndef NP_NO_CARBON
/**
* Create a TSM document for use with plugins, so that we can support IME in
* them. Once it's created, if need be (re)activate it. Some plugins (e.g.
* the Flash plugin running in Camino) don't create their own TSM document --
* without which IME can't work. Others (e.g. the Flash plugin running in
* Firefox) create a TSM document that (somehow) makes the input window behave
* badly when it contains more than one kind of input (say Hiragana and
* Romaji). (We can't just use the per-NSView TSM documents that Cocoa
* provides (those created and managed by the NSTSMInputContext class) -- for
* some reason TSMProcessRawKeyEvent() doesn't work with them.)
*/
void ActivatePluginTSMDocument();
/**
* HandleCarbonPluginKeyEvent() handles the aKeyEvent. This is called by
* PluginKeyEventsHandler().
*
* @param aKeyEvent A native Carbon event.
*/
void HandleCarbonPluginKeyEvent(EventRef aKeyEvent);
/**
* ConvertUnicodeToCharCode() converts aUnichar to native encoded string.
*
* @param aUniChar A unicode character.
* @param aOutChar Native encoded string for aUniChar.
* @return TRUE if the converting succeeded.
* Otherwise, FALSE.
*/
static bool ConvertUnicodeToCharCode(PRUnichar aUniChar,
unsigned char* aOutChar);
/**
* Target for text services events sent as the result of calls made to
* TSMProcessRawKeyEvent() in HandleKeyDownEventForPlugin() when a plugin has
* the focus. The calls to TSMProcessRawKeyEvent() short-circuit Cocoa-based
* IME (which would otherwise interfere with our efforts) and allow Carbon-
* based IME to work in plugins (via the NPAPI). This strategy doesn't cause
* trouble for plugins that (like the Java Embedding Plugin) bypass the NPAPI
* to get their keyboard events and do their own Cocoa-based IME.
*/
static OSStatus PluginKeyEventsHandler(EventHandlerCallRef aHandlerRef,
EventRef aEvent,
void *aUserData);
static EventHandlerRef sPluginKeyEventsHandler;
#endif // #ifndef NP_NO_CARBON
};
/**
* 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 PluginTextInputHandler
{
public:
virtual bool OnDestroyWidget(nsChildView* aDestroyingWidget);
virtual void OnFocusChangeInGecko(bool aFocus);
/**
* DispatchTextEvent() dispatches a text event on mWidget.
*
* @param aText User text input.
* @param aAttrString An NSAttributedString instance which indicates
* current composition string.
* @param aSelectedRange Current selected range (or caret position).
* @param aDoCommit TRUE if the composition string should be
* committed. Otherwise, FALSE.
*/
bool DispatchTextEvent(const nsString& aText,
NSAttributedString* aAttrString,
NSRange& aSelectedRange,
bool aDoCommit);
/**
* 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).
*/
void SetMarkedText(NSAttributedString* aAttrString,
NSRange& aSelectedRange);
/**
* ConversationIdentifier() returns an ID for the current editor. The ID is
* guaranteed to be unique among currently existing editors. But it might be
* the same as the ID of an editor that has already been destroyed.
*
* @return An identifier of current focused editor.
*/
NSInteger ConversationIdentifier();
/**
* GetAttributedSubstringFromRange() returns an NSAttributedString instance
* which is allocated as autorelease for aRange.
*
* @param aRange The range of string which you want.
* @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);
/**
* 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();
/**
* 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.
* @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);
/**
* 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 IsIMEOpened();
bool IsIMEEnabled() { return mIsIMEEnabled; }
bool IsASCIICapableOnly() { return mIsASCIICapableOnly; }
bool IgnoreIMECommit() { return mIgnoreIMECommit; }
bool IgnoreIMEComposition()
{
// Ignore the IME composition events when we're pending to discard the
// composition and we are not to handle the IME composition now.
return (mPendingMethods & kDiscardIMEComposition) &&
(mIsInFocusProcessing || !IsFocused());
}
void CommitIMEComposition();
void CancelIMEComposition();
void EnableIME(bool aEnableIME);
void SetIMEOpenState(bool aOpen);
void SetASCIICapableOnly(bool aASCIICapableOnly);
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 {
kResetIMEWindowLevel = 1,
kDiscardIMEComposition = 2,
kSyncASCIICapableOnly = 4
};
PRUint32 mPendingMethods;
IMEInputHandler(nsChildView* aWidget, NSView<mozView> *aNativeView);
virtual ~IMEInputHandler();
bool IsFocused();
void ResetTimer();
virtual void ExecutePendingMethods();
/**
* InsertTextAsCommittingComposition() commits current composition. If there
* is no composition, this starts a composition and commits it immediately.
*
* @param aAttrString A string which is committed.
*/
void InsertTextAsCommittingComposition(NSAttributedString* aAttrString);
private:
// If mIsIMEComposing is true, the composition string is stored here.
NSString* mIMECompositionString;
// mLastDispatchedCompositionString stores the lastest dispatched composition
// string by compositionupdate event.
nsString mLastDispatchedCompositionString;
NSRange mMarkedRange;
bool mIsIMEComposing;
bool mIsIMEEnabled;
bool mIsASCIICapableOnly;
bool mIgnoreIMECommit;
// This flag is enabled by OnFocusChangeInGecko, and will be cleared by
// ExecutePendingMethods. When this is true, IsFocus() returns TRUE. At
// that time, the focus processing in Gecko might not be finished yet. So,
// you cannot use nsQueryContentEvent or something.
bool mIsInFocusProcessing;
void KillIMEComposition();
void SendCommittedText(NSString *aString);
void OpenSystemPreferredLanguageIME();
// Pending methods
void ResetIMEWindowLevel();
void DiscardIMEComposition();
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_*.
*/
PRUint32 ConvertToTextRangeType(PRUint32 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.
*/
PRUint32 GetRangeCount(NSAttributedString *aString);
/**
* SetTextRangeList() appends text ranges to aTextRangeList.
*
* @param aTextRangeList When SetTextRangeList() returns, this will
* be set to the NSUnderlineStyleAttributeName
* ranges in aAttrString. Note that if you pass
* in a large enough auto-range instance for most
* cases (e.g., nsAutoTArray<nsTextRange, 4>),
* it prevents memory fragmentation.
* @param aAttrString An NSAttributedString instance which indicates
* current composition string.
* @param aSelectedRange Current selected range (or caret position).
*/
void SetTextRangeList(nsTArray<nsTextRange>& aTextRangeList,
NSAttributedString *aAttrString,
NSRange& aSelectedRange);
/**
* InitCompositionEvent() initializes aCompositionEvent.
*
* @param aCompositionEvent A composition event which you want to
* initialize.
*/
void InitCompositionEvent(nsCompositionEvent& aCompositionEvent);
/**
* When a composition starts, OnStartIMEComposition() is called.
*/
void OnStartIMEComposition();
/**
* When a composition is updated, OnUpdateIMEComposition() is called.
*/
void OnUpdateIMEComposition(NSString* aIMECompositionString);
/**
* When a composition is finished, OnEndIMEComposition() is called.
*/
void OnEndIMEComposition();
// 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;
};
/**
* 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 NSKeyDown event.
* @return TRUE if the event is consumed by web contents
* or chrome contents. Otherwise, FALSE.
*/
bool HandleKeyDownEvent(NSEvent* aNativeEvent);
/**
* KeyUp event handler.
*
* @param aNativeEvent A native NSKeyUp event.
*/
void HandleKeyUpEvent(NSEvent* aNativeEvent);
/**
* FlagsChanged event handler.
*
* @param aNativeEvent A native NSFlagsChanged 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
* NS_KEY_PRESS event. If this is called during composition, this commits
* the composition by the aAttrString.
*
* @param aAttrString An inserted string.
*/
void InsertText(NSAttributedString *aAttrString);
/**
* 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:
/**
* 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_
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