зеркало из https://github.com/mozilla/gecko-dev.git
276 строки
10 KiB
C++
276 строки
10 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 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 mozilla_IMEStateManager_h_
|
|
#define mozilla_IMEStateManager_h_
|
|
|
|
#include "mozilla/EventForwards.h"
|
|
#include "mozilla/StaticPtr.h"
|
|
#include "mozilla/dom/TabParent.h"
|
|
#include "nsIWidget.h"
|
|
|
|
class nsIContent;
|
|
class nsIDOMMouseEvent;
|
|
class nsIEditor;
|
|
class nsINode;
|
|
class nsPresContext;
|
|
class nsISelection;
|
|
|
|
namespace mozilla {
|
|
|
|
class EventDispatchingCallback;
|
|
class IMEContentObserver;
|
|
class TextCompositionArray;
|
|
class TextComposition;
|
|
|
|
/**
|
|
* IMEStateManager manages InputContext (e.g., active editor type, IME enabled
|
|
* state and IME open state) of nsIWidget instances, manages IMEContentObserver
|
|
* and provides useful API for IME.
|
|
*/
|
|
|
|
class IMEStateManager
|
|
{
|
|
typedef dom::TabParent TabParent;
|
|
typedef widget::IMEMessage IMEMessage;
|
|
typedef widget::IMENotification IMENotification;
|
|
typedef widget::IMEState IMEState;
|
|
typedef widget::InputContext InputContext;
|
|
typedef widget::InputContextAction InputContextAction;
|
|
|
|
public:
|
|
static void Init();
|
|
static void Shutdown();
|
|
|
|
/**
|
|
* GetActiveTabParent() returns a pointer to a TabParent instance which is
|
|
* managed by the focused content (sContent). If the focused content isn't
|
|
* managing another process, this returns nullptr.
|
|
*/
|
|
static TabParent* GetActiveTabParent()
|
|
{
|
|
// If menu has pseudo focus, we should ignore active child process.
|
|
if (sInstalledMenuKeyboardListener) {
|
|
return nullptr;
|
|
}
|
|
return sActiveTabParent.get();
|
|
}
|
|
|
|
/**
|
|
* OnTabParentDestroying() is called when aTabParent is being destroyed.
|
|
*/
|
|
static void OnTabParentDestroying(TabParent* aTabParent);
|
|
|
|
/**
|
|
* Called when aWidget is being deleted.
|
|
*/
|
|
static void WidgetDestroyed(nsIWidget* aWidget);
|
|
|
|
/**
|
|
* SetIMEContextForChildProcess() is called when aTabParent receives
|
|
* SetInputContext() from the remote process.
|
|
*/
|
|
static void SetInputContextForChildProcess(TabParent* aTabParent,
|
|
const InputContext& aInputContext,
|
|
const InputContextAction& aAction);
|
|
|
|
/**
|
|
* StopIMEStateManagement() is called when the process should stop managing
|
|
* IME state.
|
|
*/
|
|
static void StopIMEStateManagement();
|
|
|
|
static nsresult OnDestroyPresContext(nsPresContext* aPresContext);
|
|
static nsresult OnRemoveContent(nsPresContext* aPresContext,
|
|
nsIContent* aContent);
|
|
/**
|
|
* OnChangeFocus() should be called when focused content is changed or
|
|
* IME enabled state is changed. If nobody has focus, set both aPresContext
|
|
* and aContent nullptr. E.g., all windows are deactivated.
|
|
*/
|
|
static nsresult OnChangeFocus(nsPresContext* aPresContext,
|
|
nsIContent* aContent,
|
|
InputContextAction::Cause aCause);
|
|
static void OnInstalledMenuKeyboardListener(bool aInstalling);
|
|
|
|
// These two methods manage focus and selection/text observers.
|
|
// They are separate from OnChangeFocus above because this offers finer
|
|
// control compared to having the two methods incorporated into OnChangeFocus
|
|
|
|
// Get the focused editor's selection and root
|
|
static nsresult GetFocusSelectionAndRoot(nsISelection** aSel,
|
|
nsIContent** aRoot);
|
|
// This method updates the current IME state. However, if the enabled state
|
|
// isn't changed by the new state, this method does nothing.
|
|
// Note that this method changes the IME state of the active element in the
|
|
// widget. So, the caller must have focus.
|
|
static void UpdateIMEState(const IMEState &aNewIMEState,
|
|
nsIContent* aContent,
|
|
nsIEditor* aEditor);
|
|
|
|
// This method is called when user operates mouse button in focused editor
|
|
// and before the editor handles it.
|
|
// Returns true if IME consumes the event. Otherwise, false.
|
|
static bool OnMouseButtonEventInEditor(nsPresContext* aPresContext,
|
|
nsIContent* aContent,
|
|
nsIDOMMouseEvent* aMouseEvent);
|
|
|
|
// This method is called when user clicked in an editor.
|
|
// aContent must be:
|
|
// If the editor is for <input> or <textarea>, the element.
|
|
// If the editor is for contenteditable, the active editinghost.
|
|
// If the editor is for designMode, nullptr.
|
|
static void OnClickInEditor(nsPresContext* aPresContext,
|
|
nsIContent* aContent,
|
|
nsIDOMMouseEvent* aMouseEvent);
|
|
|
|
// This method is called when editor actually gets focus.
|
|
// aContent must be:
|
|
// If the editor is for <input> or <textarea>, the element.
|
|
// If the editor is for contenteditable, the active editinghost.
|
|
// If the editor is for designMode, nullptr.
|
|
static void OnFocusInEditor(nsPresContext* aPresContext,
|
|
nsIContent* aContent,
|
|
nsIEditor* aEditor);
|
|
|
|
// This method is called when the editor is initialized.
|
|
static void OnEditorInitialized(nsIEditor* aEditor);
|
|
|
|
// This method is called when the editor is (might be temporarily) being
|
|
// destroyed.
|
|
static void OnEditorDestroying(nsIEditor* aEditor);
|
|
|
|
/**
|
|
* All composition events must be dispatched via DispatchCompositionEvent()
|
|
* for storing the composition target and ensuring a set of composition
|
|
* events must be fired the stored target. If the stored composition event
|
|
* target is destroying, this removes the stored composition automatically.
|
|
*/
|
|
static void DispatchCompositionEvent(
|
|
nsINode* aEventTargetNode,
|
|
nsPresContext* aPresContext,
|
|
WidgetCompositionEvent* aCompositionEvent,
|
|
nsEventStatus* aStatus,
|
|
EventDispatchingCallback* aCallBack,
|
|
bool aIsSynthesized = false);
|
|
|
|
/**
|
|
* All selection events must be handled via HandleSelectionEvent()
|
|
* because they must be handled by same target as composition events when
|
|
* there is a composition.
|
|
*/
|
|
static void HandleSelectionEvent(nsPresContext* aPresContext,
|
|
nsIContent* aEventTargetContent,
|
|
WidgetSelectionEvent* aSelectionEvent);
|
|
|
|
/**
|
|
* This is called when PresShell ignores a composition event due to not safe
|
|
* to dispatch events.
|
|
*/
|
|
static void OnCompositionEventDiscarded(
|
|
WidgetCompositionEvent* aCompositionEvent);
|
|
|
|
/**
|
|
* Get TextComposition from widget.
|
|
*/
|
|
static already_AddRefed<TextComposition>
|
|
GetTextCompositionFor(nsIWidget* aWidget);
|
|
|
|
/**
|
|
* Returns TextComposition instance for the event.
|
|
*/
|
|
static already_AddRefed<TextComposition>
|
|
GetTextCompositionFor(const WidgetCompositionEvent* aCompositionEvent);
|
|
|
|
/**
|
|
* Returns TextComposition instance for the pres context.
|
|
* Be aware, even if another pres context which shares native IME context with
|
|
* specified pres context has composition, this returns nullptr.
|
|
*/
|
|
static already_AddRefed<TextComposition>
|
|
GetTextCompositionFor(nsPresContext* aPresContext);
|
|
|
|
/**
|
|
* Send a notification to IME. It depends on the IME or platform spec what
|
|
* will occur (or not occur).
|
|
*/
|
|
static nsresult NotifyIME(const IMENotification& aNotification,
|
|
nsIWidget* aWidget,
|
|
bool aOriginIsRemote = false);
|
|
static nsresult NotifyIME(IMEMessage aMessage,
|
|
nsIWidget* aWidget,
|
|
bool aOriginIsRemote = false);
|
|
static nsresult NotifyIME(IMEMessage aMessage,
|
|
nsPresContext* aPresContext,
|
|
bool aOriginIsRemote = false);
|
|
|
|
static nsINode* GetRootEditableNode(nsPresContext* aPresContext,
|
|
nsIContent* aContent);
|
|
|
|
protected:
|
|
static nsresult OnChangeFocusInternal(nsPresContext* aPresContext,
|
|
nsIContent* aContent,
|
|
InputContextAction aAction);
|
|
static void SetIMEState(const IMEState &aState,
|
|
nsIContent* aContent,
|
|
nsIWidget* aWidget,
|
|
InputContextAction aAction);
|
|
static void SetInputContext(nsIWidget* aWidget,
|
|
const InputContext& aInputContext,
|
|
const InputContextAction& aAction);
|
|
static IMEState GetNewIMEState(nsPresContext* aPresContext,
|
|
nsIContent* aContent);
|
|
|
|
static void EnsureTextCompositionArray();
|
|
static void CreateIMEContentObserver(nsIEditor* aEditor);
|
|
static void DestroyIMEContentObserver();
|
|
|
|
static bool IsEditable(nsINode* node);
|
|
|
|
static bool IsIMEObserverNeeded(const IMEState& aState);
|
|
|
|
static nsIContent* GetRootContent(nsPresContext* aPresContext);
|
|
|
|
static StaticRefPtr<nsIContent> sContent;
|
|
static nsPresContext* sPresContext;
|
|
static nsIWidget* sFocusedIMEWidget;
|
|
static StaticRefPtr<TabParent> sActiveTabParent;
|
|
// sActiveIMEContentObserver points to the currently active
|
|
// IMEContentObserver. This is null if there is no focused editor.
|
|
static StaticRefPtr<IMEContentObserver> sActiveIMEContentObserver;
|
|
|
|
// All active compositions in the process are stored by this array.
|
|
// When you get an item of this array and use it, please be careful.
|
|
// The instances in this array can be destroyed automatically if you do
|
|
// something to cause committing or canceling the composition.
|
|
static TextCompositionArray* sTextCompositions;
|
|
|
|
static bool sInstalledMenuKeyboardListener;
|
|
static bool sIsGettingNewIMEState;
|
|
static bool sCheckForIMEUnawareWebApps;
|
|
static bool sRemoteHasFocus;
|
|
|
|
class MOZ_STACK_CLASS GettingNewIMEStateBlocker final
|
|
{
|
|
public:
|
|
GettingNewIMEStateBlocker()
|
|
: mOldValue(IMEStateManager::sIsGettingNewIMEState)
|
|
{
|
|
IMEStateManager::sIsGettingNewIMEState = true;
|
|
}
|
|
~GettingNewIMEStateBlocker()
|
|
{
|
|
IMEStateManager::sIsGettingNewIMEState = mOldValue;
|
|
}
|
|
private:
|
|
bool mOldValue;
|
|
};
|
|
};
|
|
|
|
} // namespace mozilla
|
|
|
|
#endif // mozilla_IMEStateManager_h_
|