forked from mirrors/gecko-dev
61ce5526c6
MozReview-Commit-ID: 2rIXTlwA6my --HG-- extra : rebase_source : a51be3edd717092738c2b5e8ccc4f60540712bfd
95 lines
4.1 KiB
C++
95 lines
4.1 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_textinputdispatcherlistener_h_
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#define mozilla_textinputdispatcherlistener_h_
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#include "nsWeakReference.h"
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namespace mozilla {
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namespace widget {
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class TextEventDispatcher;
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struct IMENotification;
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struct IMENotificationRequests;
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#define NS_TEXT_INPUT_PROXY_LISTENER_IID \
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{ 0xf2226f55, 0x6ddb, 0x40d5, \
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{ 0x8a, 0x24, 0xce, 0x4d, 0x5b, 0x38, 0x15, 0xf0 } };
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class TextEventDispatcherListener : public nsSupportsWeakReference
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{
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public:
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NS_DECLARE_STATIC_IID_ACCESSOR(NS_TEXT_INPUT_PROXY_LISTENER_IID)
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/**
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* NotifyIME() is called by TextEventDispatcher::NotifyIME(). This is a
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* notification or request to IME. See document of nsIWidget::NotifyIME()
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* for the detail.
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*/
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NS_IMETHOD NotifyIME(TextEventDispatcher* aTextEventDispatcher,
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const IMENotification& aNotification) = 0;
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/**
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* Returns preference for which IME notification are received by NotifyIME().
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*/
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NS_IMETHOD_(IMENotificationRequests) GetIMENotificationRequests() = 0;
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/**
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* OnRemovedFrom() is called when the TextEventDispatcher stops working and
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* is releasing the listener.
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*/
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NS_IMETHOD_(void) OnRemovedFrom(
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TextEventDispatcher* aTextEventDispatcher) = 0;
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/**
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* WillDispatchKeyboardEvent() may be called immediately before
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* TextEventDispatcher dispatching a keyboard event. This is called only
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* during calling TextEventDispatcher::DispatchKeyboardEvent() or
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* TextEventDispatcher::MaybeDispatchKeypressEvents(). But this may not
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* be called if TextEventDispatcher thinks that the keyboard event doesn't
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* need alternative char codes.
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*
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* This method can overwrite any members of aKeyboardEvent which is already
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* initialized by TextEventDispatcher. If it's necessary, this method should
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* overwrite the charCode when Control key is pressed. TextEventDispatcher
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* computes charCode from mKeyValue. However, when Control key is pressed,
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* charCode should be an ASCII char. In such case, this method needs to
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* overwrite it properly.
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*
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* @param aTextEventDispatcher Pointer to the caller.
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* @param aKeyboardEvent The event trying to dispatch.
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* This is already initialized, but if it's
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* necessary, this method should overwrite the
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* members and set alternative char codes.
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* @param aIndexOfKeypress When aKeyboardEvent is eKeyPress event,
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* it may be a sequence of keypress events
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* if the key causes multiple characters.
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* In such case, this indicates the index from
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* first keypress event.
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* If aKeyboardEvent is the first eKeyPress or
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* other events, this value is 0.
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* @param aData The pointer which was specified at calling
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* the method of TextEventDispatcher.
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* For example, if you do:
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* |TextEventDispatcher->DispatchKeyboardEvent(
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* eKeyDown, event, status, this);|
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* Then, aData of this method becomes |this|.
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* Finally, you can use it like:
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* |static_cast<NativeEventHandler*>(aData)|
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*/
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NS_IMETHOD_(void) WillDispatchKeyboardEvent(
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TextEventDispatcher* aTextEventDispatcher,
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WidgetKeyboardEvent& aKeyboardEvent,
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uint32_t aIndexOfKeypress,
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void* aData) = 0;
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(TextEventDispatcherListener,
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NS_TEXT_INPUT_PROXY_LISTENER_IID)
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} // namespace widget
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} // namespace mozilla
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#endif // #ifndef mozilla_textinputdispatcherlistener_h_
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