/* -*- 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/. */
#include "mozilla/Logging.h"
#include "mozilla/IMEStateManager.h"
#include "mozilla/Attributes.h"
#include "mozilla/EditorBase.h"
#include "mozilla/EventListenerManager.h"
#include "mozilla/EventStates.h"
#include "mozilla/MouseEvents.h"
#include "mozilla/Preferences.h"
#include "mozilla/Services.h"
#include "mozilla/TextComposition.h"
#include "mozilla/TextEvents.h"
#include "mozilla/Unused.h"
#include "mozilla/dom/HTMLFormElement.h"
#include "mozilla/dom/TabParent.h"
#include "HTMLInputElement.h"
#include "IMEContentObserver.h"
#include "nsCOMPtr.h"
#include "nsContentUtils.h"
#include "nsIContent.h"
#include "nsIDocument.h"
#include "nsIDOMMouseEvent.h"
#include "nsIForm.h"
#include "nsIFormControl.h"
#include "nsINode.h"
#include "nsIObserverService.h"
#include "nsIPresShell.h"
#include "nsISelection.h"
#include "nsISupports.h"
#include "nsPresContext.h"
namespace mozilla {
using namespace dom;
using namespace widget;
/**
* When a method is called, log its arguments and/or related static variables
* with LogLevel::Info. However, if it puts too many logs like
* OnDestroyPresContext(), should long only when the method actually does
* something. In this case, the log should start with "<method name>".
*
* When a method quits due to unexpected situation, log the reason with
* LogLevel::Error. In this case, the log should start with
* "<method name>(), FAILED". The indent makes the log look easier.
*
* When a method does something only in some situations and it may be important
* for debug, log the information with LogLevel::Debug. In this case, the log
* should start with " <method name>(),".
*/
LazyLogModule sISMLog("IMEStateManager");
static const char* GetBoolName(bool aBool) { return aBool ? "true" : "false"; }
static const char* GetActionCauseName(InputContextAction::Cause aCause) {
switch (aCause) {
case InputContextAction::CAUSE_UNKNOWN:
return "CAUSE_UNKNOWN";
case InputContextAction::CAUSE_UNKNOWN_CHROME:
return "CAUSE_UNKNOWN_CHROME";
case InputContextAction::CAUSE_KEY:
return "CAUSE_KEY";
case InputContextAction::CAUSE_MOUSE:
return "CAUSE_MOUSE";
case InputContextAction::CAUSE_TOUCH:
return "CAUSE_TOUCH";
default:
return "illegal value";
}
}
static const char* GetActionFocusChangeName(
InputContextAction::FocusChange aFocusChange) {
switch (aFocusChange) {
case InputContextAction::FOCUS_NOT_CHANGED:
return "FOCUS_NOT_CHANGED";
case InputContextAction::GOT_FOCUS:
return "GOT_FOCUS";
case InputContextAction::LOST_FOCUS:
return "LOST_FOCUS";
case InputContextAction::MENU_GOT_PSEUDO_FOCUS:
return "MENU_GOT_PSEUDO_FOCUS";
case InputContextAction::MENU_LOST_PSEUDO_FOCUS:
return "MENU_LOST_PSEUDO_FOCUS";
default:
return "illegal value";
}
}
static const char* GetIMEStateEnabledName(IMEState::Enabled aEnabled) {
switch (aEnabled) {
case IMEState::DISABLED:
return "DISABLED";
case IMEState::ENABLED:
return "ENABLED";
case IMEState::PASSWORD:
return "PASSWORD";
case IMEState::PLUGIN:
return "PLUGIN";
default:
return "illegal value";
}
}
static const char* GetIMEStateSetOpenName(IMEState::Open aOpen) {
switch (aOpen) {
case IMEState::DONT_CHANGE_OPEN_STATE:
return "DONT_CHANGE_OPEN_STATE";
case IMEState::OPEN:
return "OPEN";
case IMEState::CLOSED:
return "CLOSED";
default:
return "illegal value";
}
}
static bool IsSameProcess(const TabParent* aTabParent1,
const TabParent* aTabParent2) {
if (aTabParent1 == aTabParent2) {
return true;
}
if (!aTabParent1 != !aTabParent2) {
return false;
}
return aTabParent1->Manager() == aTabParent2->Manager();
}
StaticRefPtr<nsIContent> IMEStateManager::sContent;
StaticRefPtr<nsPresContext> IMEStateManager::sPresContext;
nsIWidget* IMEStateManager::sWidget = nullptr;
nsIWidget* IMEStateManager::sFocusedIMEWidget = nullptr;
StaticRefPtr<TabParent> IMEStateManager::sFocusedIMETabParent;
nsIWidget* IMEStateManager::sActiveInputContextWidget = nullptr;
StaticRefPtr<TabParent> IMEStateManager::sActiveTabParent;
StaticRefPtr<IMEContentObserver> IMEStateManager::sActiveIMEContentObserver;
TextCompositionArray* IMEStateManager::sTextCompositions = nullptr;
InputContext::Origin IMEStateManager::sOrigin = InputContext::ORIGIN_MAIN;
InputContext IMEStateManager::sActiveChildInputContext;
bool IMEStateManager::sInstalledMenuKeyboardListener = false;
bool IMEStateManager::sIsGettingNewIMEState = false;
bool IMEStateManager::sCheckForIMEUnawareWebApps = false;
bool IMEStateManager::sInputModeSupported = false;
// static
void IMEStateManager::Init() {
Preferences::AddBoolVarCache(
&sCheckForIMEUnawareWebApps,
"intl.ime.hack.on_ime_unaware_apps.fire_key_events_for_composition",
false);
Preferences::AddBoolVarCache(&sInputModeSupported, "dom.forms.inputmode",
false);
sOrigin = XRE_IsParentProcess() ? InputContext::ORIGIN_MAIN
: InputContext::ORIGIN_CONTENT;
ResetActiveChildInputContext();
}
// static
void IMEStateManager::Shutdown() {
MOZ_LOG(
sISMLog, LogLevel::Info,
("Shutdown(), sTextCompositions=0x%p, sTextCompositions->Length()=%zu",
sTextCompositions, sTextCompositions ? sTextCompositions->Length() : 0));
MOZ_ASSERT(!sTextCompositions || !sTextCompositions->Length());
delete sTextCompositions;
sTextCompositions = nullptr;
// All string instances in the global space need to be empty after XPCOM
// shutdown.
sActiveChildInputContext.ShutDown();
}
// static
void IMEStateManager::OnTabParentDestroying(TabParent* aTabParent) {
if (sFocusedIMETabParent == aTabParent) {
NotifyIMEOfBlurForChildProcess();
}
if (sActiveTabParent != aTabParent) {
return;
}
MOZ_LOG(sISMLog, LogLevel::Info,
("OnTabParentDestroying(aTabParent=0x%p), "
"The active TabParent is being destroyed",
aTabParent));
// The active remote process might have crashed.
sActiveTabParent = nullptr;
// XXX: Need to disable IME?
}
// static
void IMEStateManager::WidgetDestroyed(nsIWidget* aWidget) {
if (sWidget == aWidget) {
sWidget = nullptr;
}
if (sFocusedIMEWidget == aWidget) {
NotifyIMEOfBlurForChildProcess();
sFocusedIMEWidget = nullptr;
}
if (sActiveInputContextWidget == aWidget) {
sActiveInputContextWidget = nullptr;
}
}
// static
void IMEStateManager::StopIMEStateManagement() {
MOZ_LOG(sISMLog, LogLevel::Info, ("StopIMEStateManagement()"));
// NOTE: Don't set input context from here since this has already lost
// the rights to change input context.
if (sTextCompositions && sPresContext) {
NotifyIME(REQUEST_TO_COMMIT_COMPOSITION, sPresContext, sActiveTabParent);
}
sActiveInputContextWidget = nullptr;
sPresContext = nullptr;
sContent = nullptr;
sActiveTabParent = nullptr;
DestroyIMEContentObserver();
}
// static
void IMEStateManager::NotifyIMEOfBlurForChildProcess() {
MOZ_LOG(sISMLog, LogLevel::Debug,
("NotifyIMEOfBlurForChildProcess(), sFocusedIMETabParent=0x%p, "
"sFocusedIMEWidget=0x%p",
sFocusedIMETabParent.get(), sFocusedIMEWidget));
if (!sFocusedIMETabParent) {
MOZ_ASSERT(!sFocusedIMEWidget);
return;
}
MOZ_ASSERT(sFocusedIMEWidget);
if (MOZ_LOG_TEST(sISMLog, LogLevel::Debug) && sTextCompositions) {
RefPtr<TextComposition> composition =
sTextCompositions->GetCompositionFor(sFocusedIMEWidget);
if (composition) {
MOZ_LOG(
sISMLog, LogLevel::Debug,
(" NotifyIMEOfBlurForChildProcess(), sFocusedIMEWidget still has "
"composition"));
}
}
NotifyIME(NOTIFY_IME_OF_BLUR, sFocusedIMEWidget, sFocusedIMETabParent);
MOZ_ASSERT(!sFocusedIMETabParent);
MOZ_ASSERT(!sFocusedIMEWidget);
}
// static
void IMEStateManager::MaybeStartOffsetUpdatedInChild(nsIWidget* aWidget,
uint32_t aStartOffset) {
if (NS_WARN_IF(!sTextCompositions)) {
MOZ_LOG(sISMLog, LogLevel::Warning,
("MaybeStartOffsetUpdatedInChild(aWidget=0x%p, aStartOffset=%u), "
"called when there is no composition",
aWidget, aStartOffset));
return;
}
RefPtr<TextComposition> composition = GetTextCompositionFor(aWidget);
if (NS_WARN_IF(!composition)) {
MOZ_LOG(sISMLog, LogLevel::Warning,
("MaybeStartOffsetUpdatedInChild(aWidget=0x%p, aStartOffset=%u), "
"called when there is no composition",
aWidget, aStartOffset));
return;
}
if (composition->NativeOffsetOfStartComposition() == aStartOffset) {
return;
}
MOZ_LOG(
sISMLog, LogLevel::Info,
("MaybeStartOffsetUpdatedInChild(aWidget=0x%p, aStartOffset=%u), "
"old offset=%u",
aWidget, aStartOffset, composition->NativeOffsetOfStartComposition()));
composition->OnStartOffsetUpdatedInChild(aStartOffset);
}
// static
nsresult IMEStateManager::OnDestroyPresContext(nsPresContext* aPresContext) {
NS_ENSURE_ARG_POINTER(aPresContext);
// First, if there is a composition in the aPresContext, clean up it.
if (sTextCompositions) {
TextCompositionArray::index_type i =
sTextCompositions->IndexOf(aPresContext);
if (i != TextCompositionArray::NoIndex) {
MOZ_LOG(sISMLog, LogLevel::Debug,
(" OnDestroyPresContext(), "
"removing TextComposition instance from the array (index=%zu)",
i));
// there should be only one composition per presContext object.
sTextCompositions->ElementAt(i)->Destroy();
sTextCompositions->RemoveElementAt(i);
if (sTextCompositions->IndexOf(aPresContext) !=
TextCompositionArray::NoIndex) {
MOZ_LOG(sISMLog, LogLevel::Error,
(" OnDestroyPresContext(), FAILED to remove "
"TextComposition instance from the array"));
MOZ_CRASH("Failed to remove TextComposition instance from the array");
}
}
}
if (aPresContext != sPresContext) {
return NS_OK;
}
MOZ_LOG(
sISMLog, LogLevel::Info,
("OnDestroyPresContext(aPresContext=0x%p), "
"sPresContext=0x%p, sContent=0x%p, sTextCompositions=0x%p",
aPresContext, sPresContext.get(), sContent.get(), sTextCompositions));
DestroyIMEContentObserver();
if (sWidget) {
IMEState newState = GetNewIMEState(sPresContext, nullptr);
InputContextAction action(InputContextAction::CAUSE_UNKNOWN,
InputContextAction::LOST_FOCUS);
InputContext::Origin origin =
sActiveTabParent ? InputContext::ORIGIN_CONTENT : sOrigin;
SetIMEState(newState, nullptr, nullptr, sWidget, action, origin);
}
sWidget = nullptr;
sContent = nullptr;
sPresContext = nullptr;
sActiveTabParent = nullptr;
return NS_OK;
}
// static
nsresult IMEStateManager::OnRemoveContent(nsPresContext* aPresContext,
nsIContent* aContent) {
NS_ENSURE_ARG_POINTER(aPresContext);
// First, if there is a composition in the aContent, clean up it.
if (sTextCompositions) {
RefPtr<TextComposition> compositionInContent =
sTextCompositions->GetCompositionInContent(aPresContext, aContent);
if (compositionInContent) {
MOZ_LOG(sISMLog, LogLevel::Debug,
(" OnRemoveContent(), "
"composition is in the content"));
// Try resetting the native IME state. Be aware, typically, this method
// is called during the content being removed. Then, the native
// composition events which are caused by following APIs are ignored due
// to unsafe to run script (in PresShell::HandleEvent()).
nsresult rv =
compositionInContent->NotifyIME(REQUEST_TO_CANCEL_COMPOSITION);
if (NS_FAILED(rv)) {
compositionInContent->NotifyIME(REQUEST_TO_COMMIT_COMPOSITION);
}
}
}
if (!sPresContext || !sContent ||
!nsContentUtils::ContentIsDescendantOf(sContent, aContent)) {
return NS_OK;
}
MOZ_LOG(sISMLog, LogLevel::Info,
("OnRemoveContent(aPresContext=0x%p, aContent=0x%p), "
"sPresContext=0x%p, sContent=0x%p, sTextCompositions=0x%p",
aPresContext, aContent, sPresContext.get(), sContent.get(),
sTextCompositions));
DestroyIMEContentObserver();
// Current IME transaction should commit
if (sWidget) {
IMEState newState = GetNewIMEState(sPresContext, nullptr);
InputContextAction action(InputContextAction::CAUSE_UNKNOWN,
InputContextAction::LOST_FOCUS);
InputContext::Origin origin =
sActiveTabParent ? InputContext::ORIGIN_CONTENT : sOrigin;
SetIMEState(newState, aPresContext, nullptr, sWidget, action, origin);
}
sWidget = nullptr;
sContent = nullptr;
sPresContext = nullptr;
sActiveTabParent = nullptr;
return NS_OK;
}
// static
bool IMEStateManager::CanHandleWith(nsPresContext* aPresContext) {
return aPresContext && aPresContext->GetPresShell() &&
!aPresContext->PresShell()->IsDestroying();
}
// static
nsresult IMEStateManager::OnChangeFocus(nsPresContext* aPresContext,
nsIContent* aContent,
InputContextAction::Cause aCause) {
MOZ_LOG(sISMLog, LogLevel::Info,
("OnChangeFocus(aPresContext=0x%p, aContent=0x%p, aCause=%s)",
aPresContext, aContent, GetActionCauseName(aCause)));
InputContextAction action(aCause);
return OnChangeFocusInternal(aPresContext, aContent, action);
}
// static
nsresult IMEStateManager::OnChangeFocusInternal(nsPresContext* aPresContext,
nsIContent* aContent,
InputContextAction aAction) {
RefPtr<TabParent> newTabParent = TabParent::GetFrom(aContent);
MOZ_LOG(sISMLog, LogLevel::Info,
("OnChangeFocusInternal(aPresContext=0x%p (available: %s), "
"aContent=0x%p (TabParent=0x%p), aAction={ mCause=%s, "
"mFocusChange=%s }), "
"sPresContext=0x%p (available: %s), sContent=0x%p, "
"sWidget=0x%p (available: %s), sActiveTabParent=0x%p, "
"sActiveIMEContentObserver=0x%p, sInstalledMenuKeyboardListener=%s",
aPresContext, GetBoolName(CanHandleWith(aPresContext)), aContent,
newTabParent.get(), GetActionCauseName(aAction.mCause),
GetActionFocusChangeName(aAction.mFocusChange), sPresContext.get(),
GetBoolName(CanHandleWith(sPresContext)), sContent.get(), sWidget,
GetBoolName(sWidget && !sWidget->Destroyed()),
sActiveTabParent.get(), sActiveIMEContentObserver.get(),
GetBoolName(sInstalledMenuKeyboardListener)));
// If new aPresShell has been destroyed, this should handle the focus change
// as nobody is getting focus.
if (NS_WARN_IF(aPresContext && !CanHandleWith(aPresContext))) {
MOZ_LOG(sISMLog, LogLevel::Warning,
(" OnChangeFocusInternal(), called with destroyed PresShell, "
"handling this call as nobody getting focus"));
aPresContext = nullptr;
aContent = nullptr;
}
nsCOMPtr<nsIWidget> oldWidget = sWidget;
nsCOMPtr<nsIWidget> newWidget =
aPresContext ? aPresContext->GetRootWidget() : nullptr;
bool focusActuallyChanging =
(sContent != aContent || sPresContext != aPresContext ||
oldWidget != newWidget || sActiveTabParent != newTabParent);
// If old widget has composition, we may need to commit composition since
// a native IME context is shared on all editors on some widgets or all
// widgets (it depends on platforms).
if (oldWidget && focusActuallyChanging && sTextCompositions) {
RefPtr<TextComposition> composition =
sTextCompositions->GetCompositionFor(oldWidget);
if (composition) {
// However, don't commit the composition if we're being inactivated
// but the composition should be kept even during deactive.
// Note that oldWidget and sFocusedIMEWidget may be different here (in
// such case, sFocusedIMEWidget is perhaps nullptr). For example, IME
// may receive only blur notification but still has composition.
// We need to clean up only the oldWidget's composition state here.
if (aPresContext ||
!oldWidget->IMENotificationRequestsRef().WantDuringDeactive()) {
MOZ_LOG(
sISMLog, LogLevel::Info,
(" OnChangeFocusInternal(), requesting to commit composition to "
"the (previous) focused widget"));
NotifyIME(REQUEST_TO_COMMIT_COMPOSITION, oldWidget,
composition->GetTabParent());
}
}
}
if (sActiveIMEContentObserver) {
// If there is active IMEContentObserver, it means that focused content was
// in this process. So, if a tab parent gets focus, it means that the
// focused editor in this process is being blurred.
if (newTabParent) {
DestroyIMEContentObserver();
}
// If the process is being inactivated, then, IMEContentObserver should
// stop observing the contents unless native IME requests to keep
// composition even during deactivated.
else if (!aPresContext) {
if (!sActiveIMEContentObserver->KeepAliveDuringDeactive()) {
DestroyIMEContentObserver();
}
}
// Otherwise, i.e., new focused content is in this process, let's check
// whether the new focused content is already being managed by the
// active IME content observer.
else if (!sActiveIMEContentObserver->IsManaging(aPresContext, aContent)) {
DestroyIMEContentObserver();
}
} else {
// If there is no active IMEContentObserver, it means that focused content
// may be in another process.
// If focus is moving from current focused remote process to different
// process while the process has IME focus too, we need to notify IME of
// blur here because it may be too late the blur notification to reach
// this process especially when closing active window.
// However, don't send blur if we're being deactivated and IME wants to
// keep composition during deactive because notifying blur will commit
// or cancel composition.
if (sFocusedIMETabParent && sFocusedIMEWidget &&
(aPresContext || !sFocusedIMEWidget->IMENotificationRequestsRef()
.WantDuringDeactive()) &&
!IsSameProcess(sFocusedIMETabParent, newTabParent)) {
MOZ_LOG(
sISMLog, LogLevel::Info,
(" OnChangeFocusInternal(), notifying IME of blur of previous "
"focused "
"remote process because it may be too late actual notification to "
"reach this process"));
NotifyIMEOfBlurForChildProcess();
}
}
if (!aPresContext) {
MOZ_LOG(sISMLog, LogLevel::Debug,
(" OnChangeFocusInternal(), "
"no nsPresContext is being activated"));
return NS_OK;
}
if (sActiveTabParent && !IsSameProcess(sActiveTabParent, newTabParent)) {
MOZ_LOG(sISMLog, LogLevel::Debug,
(" OnChangeFocusInternal(), notifying previous "
"focused child process of parent process or another child process "
"getting focus"));
Unused << sActiveTabParent->SendStopIMEStateManagement();
}
if (NS_WARN_IF(!newWidget)) {
MOZ_LOG(sISMLog, LogLevel::Error,
(" OnChangeFocusInternal(), FAILED due to "
"no widget to manage its IME state"));
return NS_OK;
}
// Update the cached widget since root view of the presContext may be
// changed to different view.
sWidget = newWidget;
// If a child process has focus, we should disable IME state until the child
// process actually gets focus because if user types keys before that they
// are handled by IME.
IMEState newState = newTabParent ? IMEState(IMEState::DISABLED)
: GetNewIMEState(aPresContext, aContent);
bool setIMEState = true;
if (newTabParent) {
MOZ_ASSERT(XRE_IsParentProcess());
if (aAction.mFocusChange == InputContextAction::MENU_GOT_PSEUDO_FOCUS) {
// If menu keyboard listener is installed, we need to disable IME now.
setIMEState = true;
} else if (aAction.mFocusChange ==
InputContextAction::MENU_LOST_PSEUDO_FOCUS) {
// If menu keyboard listener is uninstalled, we need to restore
// input context which was set by the remote process. However, if
// the remote process hasn't been set input context yet, we need to
// wait next SetInputContextForChildProcess() call.
if (HasActiveChildSetInputContext()) {
setIMEState = true;
newState = sActiveChildInputContext.mIMEState;
} else {
setIMEState = false;
}
} else if (focusActuallyChanging) {
InputContext context = newWidget->GetInputContext();
if (context.mIMEState.mEnabled == IMEState::DISABLED &&
context.mOrigin == InputContext::ORIGIN_CONTENT) {
setIMEState = false;
MOZ_LOG(sISMLog, LogLevel::Debug,
(" OnChangeFocusInternal(), doesn't set IME "
"state because focused element (or document) is in a child "
"process "
"and the IME state is already disabled by a remote process"));
} else {
// When new remote process gets focus, we should forget input context
// coming from old focused remote process.
ResetActiveChildInputContext();
MOZ_LOG(sISMLog, LogLevel::Debug,
(" OnChangeFocusInternal(), will disable IME "
"until new focused element (or document) in the child process "
"will get focus actually"));
}
} else if (newWidget->GetInputContext().mOrigin !=
InputContext::ORIGIN_MAIN) {
// When focus is NOT changed actually, we shouldn't set IME state if
// current input context was set by a remote process since that means
// that the window is being activated and the child process may have
// composition. Then, we shouldn't commit the composition with making
// IME state disabled.
setIMEState = false;
MOZ_LOG(sISMLog, LogLevel::Debug,
(" OnChangeFocusInternal(), doesn't set IME "
"state because focused element (or document) is already in the "
"child "
"process"));
}
} else {
// When this process gets focus, we should forget input context coming
// from remote process.
ResetActiveChildInputContext();
}
if (setIMEState) {
if (!focusActuallyChanging) {
// actual focus isn't changing, but if IME enabled state is changing,
// we should do it.
InputContext context = newWidget->GetInputContext();
if (context.mIMEState.mEnabled == newState.mEnabled) {
MOZ_LOG(sISMLog, LogLevel::Debug,
(" OnChangeFocusInternal(), "
"neither focus nor IME state is changing"));
return NS_OK;
}
aAction.mFocusChange = InputContextAction::FOCUS_NOT_CHANGED;
// Even if focus isn't changing actually, we should commit current
// composition here since the IME state is changing.
if (sPresContext && oldWidget && !focusActuallyChanging) {
NotifyIME(REQUEST_TO_COMMIT_COMPOSITION, oldWidget,
sFocusedIMETabParent);
}
} else if (aAction.mFocusChange == InputContextAction::FOCUS_NOT_CHANGED) {
// If aContent isn't null or aContent is null but editable, somebody gets
// focus.
bool gotFocus = aContent || (newState.mEnabled == IMEState::ENABLED);
aAction.mFocusChange = gotFocus ? InputContextAction::GOT_FOCUS
: InputContextAction::LOST_FOCUS;
}
if (newTabParent && HasActiveChildSetInputContext() &&
aAction.mFocusChange == InputContextAction::MENU_LOST_PSEUDO_FOCUS) {
// Restore the input context in the active remote process when
// menu keyboard listener is uninstalled and active remote tab has
// focus.
SetInputContext(newWidget, sActiveChildInputContext, aAction);
} else {
// Update IME state for new focus widget
SetIMEState(newState, aPresContext, aContent, newWidget, aAction,
newTabParent ? InputContext::ORIGIN_CONTENT : sOrigin);
}
}
sActiveTabParent = newTabParent;
sPresContext = aPresContext;
sContent = aContent;
// Don't call CreateIMEContentObserver() here except when a plugin gets
// focus because it will be called from the focus event handler of focused
// editor.
if (newState.mEnabled == IMEState::PLUGIN) {
CreateIMEContentObserver(nullptr);
if (sActiveIMEContentObserver) {
MOZ_LOG(
sISMLog, LogLevel::Debug,
(" OnChangeFocusInternal(), an "
"IMEContentObserver instance is created for plugin and trying to "
"flush its pending notifications..."));
sActiveIMEContentObserver->TryToFlushPendingNotifications(false);
}
}
return NS_OK;
}
// static
void IMEStateManager::OnInstalledMenuKeyboardListener(bool aInstalling) {
MOZ_LOG(
sISMLog, LogLevel::Info,
("OnInstalledMenuKeyboardListener(aInstalling=%s), "
"sInstalledMenuKeyboardListener=%s, sActiveTabParent=0x%p, "
"sActiveChildInputContext={ mIMEState={ mEnabled=%s, mOpen=%s }, "
"mHTMLInputType=\"%s\", mHTMLInputInputmode=\"%s\", mActionHint=\"%s\", "
"mInPrivateBrowsing=%s }",
GetBoolName(aInstalling), GetBoolName(sInstalledMenuKeyboardListener),
sActiveTabParent.get(),
GetIMEStateEnabledName(sActiveChildInputContext.mIMEState.mEnabled),
GetIMEStateSetOpenName(sActiveChildInputContext.mIMEState.mOpen),
NS_ConvertUTF16toUTF8(sActiveChildInputContext.mHTMLInputType).get(),
NS_ConvertUTF16toUTF8(sActiveChildInputContext.mHTMLInputInputmode)
.get(),
NS_ConvertUTF16toUTF8(sActiveChildInputContext.mActionHint).get(),
GetBoolName(sActiveChildInputContext.mInPrivateBrowsing)));
sInstalledMenuKeyboardListener = aInstalling;
InputContextAction action(InputContextAction::CAUSE_UNKNOWN,
aInstalling
? InputContextAction::MENU_GOT_PSEUDO_FOCUS
: InputContextAction::MENU_LOST_PSEUDO_FOCUS);
OnChangeFocusInternal(sPresContext, sContent, action);
}
// static
bool IMEStateManager::OnMouseButtonEventInEditor(
nsPresContext* aPresContext, nsIContent* aContent,
WidgetMouseEvent* aMouseEvent) {
MOZ_LOG(sISMLog, LogLevel::Info,
("OnMouseButtonEventInEditor(aPresContext=0x%p, "
"aContent=0x%p, aMouseEvent=0x%p), sPresContext=0x%p, sContent=0x%p",
aPresContext, aContent, aMouseEvent, sPresContext.get(),
sContent.get()));
if (NS_WARN_IF(!aMouseEvent)) {
MOZ_LOG(sISMLog, LogLevel::Debug,
(" OnMouseButtonEventInEditor(), aMouseEvent is nullptr"));
return false;
}
if (sPresContext != aPresContext || sContent != aContent) {
MOZ_LOG(sISMLog, LogLevel::Debug,
(" OnMouseButtonEventInEditor(), "
"the mouse event isn't fired on the editor managed by ISM"));
return false;
}
if (!sActiveIMEContentObserver) {
MOZ_LOG(sISMLog, LogLevel::Debug,
(" OnMouseButtonEventInEditor(), "
"there is no active IMEContentObserver"));
return false;
}
if (!sActiveIMEContentObserver->IsManaging(aPresContext, aContent)) {
MOZ_LOG(sISMLog, LogLevel::Debug,
(" OnMouseButtonEventInEditor(), "
"the active IMEContentObserver isn't managing the editor"));
return false;
}
bool consumed =
sActiveIMEContentObserver->OnMouseButtonEvent(aPresContext, aMouseEvent);
if (MOZ_LOG_TEST(sISMLog, LogLevel::Info)) {
nsAutoString eventType;
MOZ_LOG(sISMLog, LogLevel::Info,
(" OnMouseButtonEventInEditor(), "
"mouse event (mMessage=%s, button=%d) is %s",
ToChar(aMouseEvent->mMessage), aMouseEvent->button,
consumed ? "consumed" : "not consumed"));
}
return consumed;
}
// static
void IMEStateManager::OnClickInEditor(nsPresContext* aPresContext,
nsIContent* aContent,
const WidgetMouseEvent* aMouseEvent) {
MOZ_LOG(
sISMLog, LogLevel::Info,
("OnClickInEditor(aPresContext=0x%p, aContent=0x%p, aMouseEvent=0x%p), "
"sPresContext=0x%p, sContent=0x%p, sWidget=0x%p (available: %s)",
aPresContext, aContent, aMouseEvent, sPresContext.get(), sContent.get(),
sWidget, GetBoolName(sWidget && !sWidget->Destroyed())));
if (NS_WARN_IF(!aMouseEvent)) {
return;
}
if (sPresContext != aPresContext || sContent != aContent ||
NS_WARN_IF(!sPresContext) || NS_WARN_IF(!sWidget) ||
NS_WARN_IF(sWidget->Destroyed())) {
MOZ_LOG(sISMLog, LogLevel::Debug,
(" OnClickInEditor(), "
"the mouse event isn't fired on the editor managed by ISM"));
return;
}
nsCOMPtr<nsIWidget> widget(sWidget);
MOZ_ASSERT(!sPresContext->GetRootWidget() ||
sPresContext->GetRootWidget() == widget);
if (!aMouseEvent->IsTrusted()) {
MOZ_LOG(sISMLog, LogLevel::Debug,
(" OnClickInEditor(), "
"the mouse event isn't a trusted event"));
return; // ignore untrusted event.
}
if (aMouseEvent->button) {
MOZ_LOG(sISMLog, LogLevel::Debug,
(" OnClickInEditor(), "
"the mouse event isn't a left mouse button event"));
return; // not a left click event.
}
if (aMouseEvent->mClickCount != 1) {
MOZ_LOG(sISMLog, LogLevel::Debug,
(" OnClickInEditor(), "
"the mouse event isn't a single click event"));
return; // should notify only first click event.
}
InputContextAction::Cause cause =
aMouseEvent->inputSource == nsIDOMMouseEvent::MOZ_SOURCE_TOUCH
? InputContextAction::CAUSE_TOUCH
: InputContextAction::CAUSE_MOUSE;
InputContextAction action(cause, InputContextAction::FOCUS_NOT_CHANGED);
IMEState newState = GetNewIMEState(aPresContext, aContent);
SetIMEState(newState, aPresContext, aContent, widget, action, sOrigin);
}
// static
void IMEStateManager::OnFocusInEditor(nsPresContext* aPresContext,
nsIContent* aContent,
EditorBase& aEditorBase) {
MOZ_LOG(
sISMLog, LogLevel::Info,
("OnFocusInEditor(aPresContext=0x%p, aContent=0x%p, aEditorBase=0x%p), "
"sPresContext=0x%p, sContent=0x%p, sActiveIMEContentObserver=0x%p",
aPresContext, aContent, &aEditorBase, sPresContext.get(), sContent.get(),
sActiveIMEContentObserver.get()));
if (sPresContext != aPresContext || sContent != aContent) {
MOZ_LOG(sISMLog, LogLevel::Debug,
(" OnFocusInEditor(), "
"an editor not managed by ISM gets focus"));
return;
}
// If the IMEContentObserver instance isn't managing the editor actually,
// we need to recreate the instance.
if (sActiveIMEContentObserver) {
if (sActiveIMEContentObserver->IsManaging(aPresContext, aContent)) {
MOZ_LOG(
sISMLog, LogLevel::Debug,
(" OnFocusInEditor(), "
"the editor is already being managed by sActiveIMEContentObserver"));
return;
}
DestroyIMEContentObserver();
}
CreateIMEContentObserver(&aEditorBase);
// Let's flush the focus notification now.
if (sActiveIMEContentObserver) {
MOZ_LOG(sISMLog, LogLevel::Debug,
(" OnFocusInEditor(), new IMEContentObserver is "
"created, trying to flush pending notifications..."));
sActiveIMEContentObserver->TryToFlushPendingNotifications(false);
}
}
// static
void IMEStateManager::OnEditorInitialized(EditorBase& aEditorBase) {
if (!sActiveIMEContentObserver ||
!sActiveIMEContentObserver->WasInitializedWith(aEditorBase)) {
return;
}
MOZ_LOG(sISMLog, LogLevel::Info,
("OnEditorInitialized(aEditorBase=0x%p)", &aEditorBase));
sActiveIMEContentObserver->UnsuppressNotifyingIME();
}
// static
void IMEStateManager::OnEditorDestroying(EditorBase& aEditorBase) {
if (!sActiveIMEContentObserver ||
!sActiveIMEContentObserver->WasInitializedWith(aEditorBase)) {
return;
}
MOZ_LOG(sISMLog, LogLevel::Info,
("OnEditorDestroying(aEditorBase=0x%p)", &aEditorBase));
// The IMEContentObserver shouldn't notify IME of anything until reframing
// is finished.
sActiveIMEContentObserver->SuppressNotifyingIME();
}
// static
void IMEStateManager::UpdateIMEState(const IMEState& aNewIMEState,
nsIContent* aContent,
EditorBase* aEditorBase) {
MOZ_LOG(
sISMLog, LogLevel::Info,
("UpdateIMEState(aNewIMEState={ mEnabled=%s, "
"mOpen=%s }, aContent=0x%p, aEditorBase=0x%p), "
"sPresContext=0x%p, sContent=0x%p, sWidget=0x%p (available: %s), "
"sActiveIMEContentObserver=0x%p, sIsGettingNewIMEState=%s",
GetIMEStateEnabledName(aNewIMEState.mEnabled),
GetIMEStateSetOpenName(aNewIMEState.mOpen), aContent, aEditorBase,
sPresContext.get(), sContent.get(), sWidget,
GetBoolName(sWidget && !sWidget->Destroyed()),
sActiveIMEContentObserver.get(), GetBoolName(sIsGettingNewIMEState)));
if (sIsGettingNewIMEState) {
MOZ_LOG(sISMLog, LogLevel::Debug,
(" UpdateIMEState(), "
"does nothing because of called while getting new IME state"));
return;
}
nsCOMPtr<nsIPresShell> presShell;
if (!aEditorBase) {
MOZ_ASSERT(aContent, "we must have content");
nsIDocument* doc = aContent->OwnerDoc();
presShell = doc->GetShell();
} else {
presShell = aEditorBase->GetPresShell();
}
if (NS_WARN_IF(!presShell)) {
MOZ_LOG(sISMLog, LogLevel::Error,
(" UpdateIMEState(), FAILED due to "
"editor doesn't have PresShell"));
return;
}
nsPresContext* presContext = presShell->GetPresContext();
if (NS_WARN_IF(!presContext)) {
MOZ_LOG(sISMLog, LogLevel::Error,
(" UpdateIMEState(), FAILED due to "
"editor doesn't have PresContext"));
return;
}
// IMEStateManager::UpdateIMEState() should be called after
// IMEStateManager::OnChangeFocus() is called for setting focus to aContent
// and aEditorBase. However, when aEditorBase is an HTMLEditor, this may be
// called by nsIEditor::PostCreate() before IMEStateManager::OnChangeFocus().
// Similarly, when aEditorBase is a TextEditor, this may be called by
// nsIEditor::SetFlags(). In such cases, this method should do nothing
// because input context should be updated when
// IMEStateManager::OnChangeFocus() is called later.
if (sPresContext != presContext) {
MOZ_LOG(sISMLog, LogLevel::Warning,
(" UpdateIMEState(), does nothing due to "
"the editor hasn't managed by IMEStateManager yet"));
return;
}
// If IMEStateManager doesn't manage any document, this cannot update IME
// state of any widget.
if (NS_WARN_IF(!sPresContext)) {
MOZ_LOG(sISMLog, LogLevel::Error,
(" UpdateIMEState(), FAILED due to "
"no managing nsPresContext"));
return;
}
if (NS_WARN_IF(!sWidget) || NS_WARN_IF(sWidget->Destroyed())) {
MOZ_LOG(sISMLog, LogLevel::Error,
(" UpdateIMEState(), FAILED due to "
"the widget for the managing nsPresContext has gone"));
return;
}
nsCOMPtr<nsIWidget> widget(sWidget);
MOZ_ASSERT(!sPresContext->GetRootWidget() ||
sPresContext->GetRootWidget() == widget);
// Even if there is active IMEContentObserver, it may not be observing the
// editor with current editable root content due to reframed. In such case,
// We should try to reinitialize the IMEContentObserver.
if (sActiveIMEContentObserver && IsIMEObserverNeeded(aNewIMEState)) {
MOZ_LOG(sISMLog, LogLevel::Debug,
(" UpdateIMEState(), try to reinitialize the "
"active IMEContentObserver"));
RefPtr<IMEContentObserver> contentObserver = sActiveIMEContentObserver;
if (!contentObserver->MaybeReinitialize(widget, sPresContext, aContent,
aEditorBase)) {
MOZ_LOG(sISMLog, LogLevel::Error,
(" UpdateIMEState(), failed to reinitialize the "
"active IMEContentObserver"));
}
if (NS_WARN_IF(widget->Destroyed())) {
MOZ_LOG(sISMLog, LogLevel::Error,
(" UpdateIMEState(), widget has gone during reinitializing the "
"active IMEContentObserver"));
return;
}
}
// If there is no active IMEContentObserver or it isn't observing the
// editor correctly, we should recreate it.
bool createTextStateManager =
(!sActiveIMEContentObserver ||
!sActiveIMEContentObserver->IsManaging(sPresContext, aContent));
bool updateIMEState =
(widget->GetInputContext().mIMEState.mEnabled != aNewIMEState.mEnabled);
if (NS_WARN_IF(widget->Destroyed())) {
MOZ_LOG(
sISMLog, LogLevel::Error,
(" UpdateIMEState(), widget has gone during getting input context"));
return;
}
if (updateIMEState) {
// commit current composition before modifying IME state.
NotifyIME(REQUEST_TO_COMMIT_COMPOSITION, widget, sFocusedIMETabParent);
if (NS_WARN_IF(widget->Destroyed())) {
MOZ_LOG(sISMLog, LogLevel::Error,
(" UpdateIMEState(), widget has gone during committing "
"composition"));
return;
}
}
if (createTextStateManager) {
DestroyIMEContentObserver();
}
if (updateIMEState) {
InputContextAction action(InputContextAction::CAUSE_UNKNOWN,
InputContextAction::FOCUS_NOT_CHANGED);
SetIMEState(aNewIMEState, presContext, aContent, widget, action, sOrigin);
if (NS_WARN_IF(widget->Destroyed())) {
MOZ_LOG(
sISMLog, LogLevel::Error,
(" UpdateIMEState(), widget has gone during setting input context"));
return;
}
}
if (createTextStateManager) {
// XXX In this case, it might not be enough safe to notify IME of anything.
// So, don't try to flush pending notifications of IMEContentObserver
// here.
CreateIMEContentObserver(aEditorBase);
}
}
// static
IMEState IMEStateManager::GetNewIMEState(nsPresContext* aPresContext,
nsIContent* aContent) {
MOZ_LOG(
sISMLog, LogLevel::Info,
("GetNewIMEState(aPresContext=0x%p, aContent=0x%p), "
"sInstalledMenuKeyboardListener=%s",
aPresContext, aContent, GetBoolName(sInstalledMenuKeyboardListener)));
if (!CanHandleWith(aPresContext)) {
MOZ_LOG(sISMLog, LogLevel::Debug,
(" GetNewIMEState() returns DISABLED because "
"the nsPresContext has been destroyed"));
return IMEState(IMEState::DISABLED);
}
// On Printing or Print Preview, we don't need IME.
if (aPresContext->Type() == nsPresContext::eContext_PrintPreview ||
aPresContext->Type() == nsPresContext::eContext_Print) {
MOZ_LOG(sISMLog, LogLevel::Debug,
(" GetNewIMEState() returns DISABLED because "
"the nsPresContext is for print or print preview"));
return IMEState(IMEState::DISABLED);
}
if (sInstalledMenuKeyboardListener) {
MOZ_LOG(sISMLog, LogLevel::Debug,
(" GetNewIMEState() returns DISABLED because "
"menu keyboard listener was installed"));
return IMEState(IMEState::DISABLED);
}
if (!aContent) {
// Even if there are no focused content, the focused document might be
// editable, such case is design mode.
nsIDocument* doc = aPresContext->Document();
if (doc && doc->HasFlag(NODE_IS_EDITABLE)) {
MOZ_LOG(sISMLog, LogLevel::Debug,
(" GetNewIMEState() returns ENABLED because "
"design mode editor has focus"));
return IMEState(IMEState::ENABLED);
}
MOZ_LOG(sISMLog, LogLevel::Debug,
(" GetNewIMEState() returns DISABLED because "
"no content has focus"));
return IMEState(IMEState::DISABLED);
}
// nsIContent::GetDesiredIMEState() may cause a call of UpdateIMEState()
// from EditorBase::PostCreate() because GetDesiredIMEState() needs to
// retrieve an editor instance for the element if it's editable element.
// For avoiding such nested IME state updates, we should set
// sIsGettingNewIMEState here and UpdateIMEState() should check it.
GettingNewIMEStateBlocker blocker;
IMEState newIMEState = aContent->GetDesiredIMEState();
MOZ_LOG(sISMLog, LogLevel::Debug,
(" GetNewIMEState() returns { mEnabled=%s, "
"mOpen=%s }",
GetIMEStateEnabledName(newIMEState.mEnabled),
GetIMEStateSetOpenName(newIMEState.mOpen)));
return newIMEState;
}
static bool MayBeIMEUnawareWebApp(nsINode* aNode) {
bool haveKeyEventsListener = false;
while (aNode) {
EventListenerManager* const mgr = aNode->GetExistingListenerManager();
if (mgr) {
if (mgr->MayHaveInputOrCompositionEventListener()) {
return false;
}
haveKeyEventsListener |= mgr->MayHaveKeyEventListener();
}
aNode = aNode->GetParentNode();
}
return haveKeyEventsListener;
}
// static
void IMEStateManager::ResetActiveChildInputContext() {
sActiveChildInputContext.mIMEState.mEnabled = IMEState::UNKNOWN;
}
// static
bool IMEStateManager::HasActiveChildSetInputContext() {
return sActiveChildInputContext.mIMEState.mEnabled != IMEState::UNKNOWN;
}
// static
void IMEStateManager::SetInputContextForChildProcess(
TabParent* aTabParent, const InputContext& aInputContext,
const InputContextAction& aAction) {
MOZ_LOG(
sISMLog, LogLevel::Info,
("SetInputContextForChildProcess(aTabParent=0x%p, "
"aInputContext={ mIMEState={ mEnabled=%s, mOpen=%s }, "
"mHTMLInputType=\"%s\", mHTMLInputInputmode=\"%s\", mActionHint=\"%s\", "
"mInPrivateBrowsing=%s }, aAction={ mCause=%s, mAction=%s }), "
"sPresContext=0x%p (available: %s), sWidget=0x%p (available: %s), "
"sActiveTabParent=0x%p, sInstalledMenuKeyboardListener=%s",
aTabParent, GetIMEStateEnabledName(aInputContext.mIMEState.mEnabled),
GetIMEStateSetOpenName(aInputContext.mIMEState.mOpen),
NS_ConvertUTF16toUTF8(aInputContext.mHTMLInputType).get(),
NS_ConvertUTF16toUTF8(aInputContext.mHTMLInputInputmode).get(),
NS_ConvertUTF16toUTF8(aInputContext.mActionHint).get(),
GetBoolName(aInputContext.mInPrivateBrowsing),
GetActionCauseName(aAction.mCause),
GetActionFocusChangeName(aAction.mFocusChange), sPresContext.get(),
GetBoolName(CanHandleWith(sPresContext)), sWidget,
GetBoolName(sWidget && !sWidget->Destroyed()), sActiveTabParent.get(),
GetBoolName(sInstalledMenuKeyboardListener)));
if (aTabParent != sActiveTabParent) {
MOZ_LOG(sISMLog, LogLevel::Error,
(" SetInputContextForChildProcess(), FAILED, "
"because non-focused tab parent tries to set input context"));
return;
}
if (NS_WARN_IF(!CanHandleWith(sPresContext))) {
MOZ_LOG(sISMLog, LogLevel::Error,
(" SetInputContextForChildProcess(), FAILED, "
"due to no focused presContext"));
return;
}
if (NS_WARN_IF(!sWidget) || NS_WARN_IF(sWidget->Destroyed())) {
MOZ_LOG(sISMLog, LogLevel::Error,
(" SetInputContextForChildProcess(), FAILED, "
"due to the widget for the nsPresContext has gone"));
return;
}
nsCOMPtr<nsIWidget> widget(sWidget);
MOZ_ASSERT(!sPresContext->GetRootWidget() ||
sPresContext->GetRootWidget() == widget);
MOZ_ASSERT(aInputContext.mOrigin == InputContext::ORIGIN_CONTENT);
sActiveChildInputContext = aInputContext;
MOZ_ASSERT(HasActiveChildSetInputContext());
// If input context is changed in remote process while menu keyboard listener
// is installed, this process shouldn't set input context now. When it's
// uninstalled, input context should be restored from
// sActiveChildInputContext.
if (sInstalledMenuKeyboardListener) {
MOZ_LOG(sISMLog, LogLevel::Info,
(" SetInputContextForChildProcess(), waiting to set input context "
"until menu keyboard listener is uninstalled"));
return;
}
SetInputContext(widget, aInputContext, aAction);
}
// static
void IMEStateManager::SetIMEState(const IMEState& aState,
nsPresContext* aPresContext,
nsIContent* aContent, nsIWidget* aWidget,
InputContextAction aAction,
InputContext::Origin aOrigin) {
MOZ_LOG(sISMLog, LogLevel::Info,
("SetIMEState(aState={ mEnabled=%s, mOpen=%s }, "
"aContent=0x%p (TabParent=0x%p), aWidget=0x%p, aAction={ mCause=%s, "
"mFocusChange=%s }, aOrigin=%s)",
GetIMEStateEnabledName(aState.mEnabled),
GetIMEStateSetOpenName(aState.mOpen), aContent,
TabParent::GetFrom(aContent), aWidget,
GetActionCauseName(aAction.mCause),
GetActionFocusChangeName(aAction.mFocusChange), ToChar(aOrigin)));
NS_ENSURE_TRUE_VOID(aWidget);
InputContext context;
context.mIMEState = aState;
context.mOrigin = aOrigin;
context.mMayBeIMEUnaware = context.mIMEState.IsEditable() &&
sCheckForIMEUnawareWebApps &&
MayBeIMEUnawareWebApp(aContent);
context.mHasHandledUserInput =
aPresContext && aPresContext->PresShell()->HasHandledUserInput();
context.mInPrivateBrowsing =
aPresContext &&
nsContentUtils::IsInPrivateBrowsing(aPresContext->Document());
if (aContent &&
aContent->IsAnyOfHTMLElements(nsGkAtoms::input, nsGkAtoms::textarea)) {
if (!aContent->IsHTMLElement(nsGkAtoms::textarea)) {
// <input type=number> has an anonymous <input type=text> descendant
// that gets focus whenever anyone tries to focus the number control. We
// need to check if aContent is one of those anonymous text controls and,
// if so, use the number control instead:
Element* element = aContent->AsElement();
HTMLInputElement* inputElement =
HTMLInputElement::FromContentOrNull(aContent);
if (inputElement) {
HTMLInputElement* ownerNumberControl =
inputElement->GetOwnerNumberControl();
if (ownerNumberControl) {
element = ownerNumberControl; // an <input type=number>
}
}
element->GetAttr(kNameSpaceID_None, nsGkAtoms::type,
context.mHTMLInputType);
} else {
context.mHTMLInputType.Assign(nsGkAtoms::textarea->GetUTF16String());
}
if (sInputModeSupported ||
nsContentUtils::IsChromeDoc(aContent->OwnerDoc())) {
aContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::inputmode,
context.mHTMLInputInputmode);
if (context.mHTMLInputInputmode.EqualsLiteral("mozAwesomebar") &&
!nsContentUtils::IsChromeDoc(aContent->OwnerDoc())) {
// mozAwesomebar should be allowed only in chrome
context.mHTMLInputInputmode.Truncate();
}
}
aContent->AsElement()->GetAttr(
kNameSpaceID_None, nsGkAtoms::moz_action_hint, context.mActionHint);
// Get the input content corresponding to the focused node,
// which may be an anonymous child of the input content.
nsIContent* inputContent = aContent->FindFirstNonChromeOnlyAccessContent();
// If we don't have an action hint and
// return won't submit the form, use "next".
if (context.mActionHint.IsEmpty() &&
inputContent->IsHTMLElement(nsGkAtoms::input)) {
bool willSubmit = false;
nsCOMPtr<nsIFormControl> control(do_QueryInterface(inputContent));
mozilla::dom::Element* formElement = nullptr;
nsCOMPtr<nsIForm> form;
if (control) {
formElement = control->GetFormElement();
// is this a form and does it have a default submit element?
if ((form = do_QueryInterface(formElement)) &&
form->GetDefaultSubmitElement()) {
willSubmit = true;
// is this an html form...
} else if (formElement && formElement->IsHTMLElement(nsGkAtoms::form)) {
dom::HTMLFormElement* htmlForm =
static_cast<dom::HTMLFormElement*>(formElement);
// ... and does it only have a single text input element ?
if (!htmlForm->ImplicitSubmissionIsDisabled() ||
// ... or is this the last non-disabled element?
htmlForm->IsLastActiveElement(control)) {
willSubmit = true;
}
}
}
context.mActionHint.Assign(
willSubmit
? (control->ControlType() == NS_FORM_INPUT_SEARCH
? NS_LITERAL_STRING("search")
: NS_LITERAL_STRING("go"))
: (formElement ? NS_LITERAL_STRING("next") : EmptyString()));
}
}
// XXX I think that we should use nsContentUtils::IsCallerChrome() instead
// of the process type.
if (aAction.mCause == InputContextAction::CAUSE_UNKNOWN &&
!XRE_IsContentProcess()) {
aAction.mCause = InputContextAction::CAUSE_UNKNOWN_CHROME;
}
if ((aAction.mCause == InputContextAction::CAUSE_UNKNOWN ||
aAction.mCause == InputContextAction::CAUSE_UNKNOWN_CHROME) &&
EventStateManager::IsHandlingUserInput()) {
aAction.mCause =
EventStateManager::IsHandlingKeyboardInput()
? InputContextAction::CAUSE_UNKNOWN_DURING_KEYBOARD_INPUT
: InputContextAction::CAUSE_UNKNOWN_DURING_NON_KEYBOARD_INPUT;
}
SetInputContext(aWidget, context, aAction);
}
// static
void IMEStateManager::SetInputContext(nsIWidget* aWidget,
const InputContext& aInputContext,
const InputContextAction& aAction) {
MOZ_LOG(
sISMLog, LogLevel::Info,
("SetInputContext(aWidget=0x%p, aInputContext={ "
"mIMEState={ mEnabled=%s, mOpen=%s }, mHTMLInputType=\"%s\", "
"mHTMLInputInputmode=\"%s\", mActionHint=\"%s\", "
"mInPrivateBrowsing=%s }, "
"aAction={ mCause=%s, mAction=%s }), sActiveTabParent=0x%p",
aWidget, GetIMEStateEnabledName(aInputContext.mIMEState.mEnabled),
GetIMEStateSetOpenName(aInputContext.mIMEState.mOpen),
NS_ConvertUTF16toUTF8(aInputContext.mHTMLInputType).get(),
NS_ConvertUTF16toUTF8(aInputContext.mHTMLInputInputmode).get(),
NS_ConvertUTF16toUTF8(aInputContext.mActionHint).get(),
GetBoolName(aInputContext.mInPrivateBrowsing),
GetActionCauseName(aAction.mCause),
GetActionFocusChangeName(aAction.mFocusChange), sActiveTabParent.get()));
MOZ_RELEASE_ASSERT(aWidget);
nsCOMPtr<nsIWidget> widget(aWidget);
widget->SetInputContext(aInputContext, aAction);
sActiveInputContextWidget = widget;
}
// static
void IMEStateManager::EnsureTextCompositionArray() {
if (sTextCompositions) {
return;
}
sTextCompositions = new TextCompositionArray();
}
// static
void IMEStateManager::DispatchCompositionEvent(
nsINode* aEventTargetNode, nsPresContext* aPresContext,
WidgetCompositionEvent* aCompositionEvent, nsEventStatus* aStatus,
EventDispatchingCallback* aCallBack, bool aIsSynthesized) {
RefPtr<TabParent> tabParent =
aEventTargetNode->IsContent()
? TabParent::GetFrom(aEventTargetNode->AsContent())
: nullptr;
MOZ_LOG(
sISMLog, LogLevel::Info,
("DispatchCompositionEvent(aNode=0x%p, "
"aPresContext=0x%p, aCompositionEvent={ mMessage=%s, "
"mNativeIMEContext={ mRawNativeIMEContext=0x%" PRIXPTR ", "
"mOriginProcessID=0x%" PRIX64 " }, mWidget(0x%p)={ "
"GetNativeIMEContext()={ mRawNativeIMEContext=0x%" PRIXPTR ", "
"mOriginProcessID=0x%" PRIX64 " }, Destroyed()=%s }, "
"mFlags={ mIsTrusted=%s, mPropagationStopped=%s } }, "
"aIsSynthesized=%s), tabParent=%p",
aEventTargetNode, aPresContext, ToChar(aCompositionEvent->mMessage),
aCompositionEvent->mNativeIMEContext.mRawNativeIMEContext,
aCompositionEvent->mNativeIMEContext.mOriginProcessID,
aCompositionEvent->mWidget.get(),
aCompositionEvent->mWidget->GetNativeIMEContext().mRawNativeIMEContext,
aCompositionEvent->mWidget->GetNativeIMEContext().mOriginProcessID,
GetBoolName(aCompositionEvent->mWidget->Destroyed()),
GetBoolName(aCompositionEvent->mFlags.mIsTrusted),
GetBoolName(aCompositionEvent->mFlags.mPropagationStopped),
GetBoolName(aIsSynthesized), tabParent.get()));
if (!aCompositionEvent->IsTrusted() ||
aCompositionEvent->PropagationStopped()) {
return;
}
MOZ_ASSERT(aCompositionEvent->mMessage != eCompositionUpdate,
"compositionupdate event shouldn't be dispatched manually");
EnsureTextCompositionArray();
RefPtr<TextComposition> composition =
sTextCompositions->GetCompositionFor(aCompositionEvent);
if (!composition) {
// If synthesized event comes after delayed native composition events
// for request of commit or cancel, we should ignore it.
if (NS_WARN_IF(aIsSynthesized)) {
return;
}
MOZ_LOG(sISMLog, LogLevel::Debug,
(" DispatchCompositionEvent(), "
"adding new TextComposition to the array"));
MOZ_ASSERT(aCompositionEvent->mMessage == eCompositionStart);
composition = new TextComposition(aPresContext, aEventTargetNode, tabParent,
aCompositionEvent);
sTextCompositions->AppendElement(composition);
}
#ifdef DEBUG
else {
MOZ_ASSERT(aCompositionEvent->mMessage != eCompositionStart);
}
#endif // #ifdef DEBUG
// Dispatch the event on composing target.
composition->DispatchCompositionEvent(aCompositionEvent, aStatus, aCallBack,
aIsSynthesized);
// WARNING: the |composition| might have been destroyed already.
// Remove the ended composition from the array.
// NOTE: When TextComposition is synthesizing compositionend event for
// emulating a commit, the instance shouldn't be removed from the array
// because IME may perform it later. Then, we need to ignore the
// following commit events in TextComposition::DispatchEvent().
// However, if commit or cancel for a request is performed synchronously
// during not safe to dispatch events, PresShell must have discarded
// compositionend event. Then, the synthesized compositionend event is
// the last event for the composition. In this case, we need to
// destroy the TextComposition with synthesized compositionend event.
if ((!aIsSynthesized ||
composition->WasNativeCompositionEndEventDiscarded()) &&
aCompositionEvent->CausesDOMCompositionEndEvent()) {
TextCompositionArray::index_type i =
sTextCompositions->IndexOf(aCompositionEvent->mWidget);
if (i != TextCompositionArray::NoIndex) {
MOZ_LOG(
sISMLog, LogLevel::Debug,
(" DispatchCompositionEvent(), "
"removing TextComposition from the array since NS_COMPOSTION_END "
"was dispatched"));
sTextCompositions->ElementAt(i)->Destroy();
sTextCompositions->RemoveElementAt(i);
}
}
}
// static
IMEContentObserver* IMEStateManager::GetActiveContentObserver() {
return sActiveIMEContentObserver;
}
// static
nsIContent* IMEStateManager::GetRootContent(nsPresContext* aPresContext) {
nsIDocument* doc = aPresContext->Document();
if (NS_WARN_IF(!doc)) {
return nullptr;
}
return doc->GetRootElement();
}
// static
void IMEStateManager::HandleSelectionEvent(
nsPresContext* aPresContext, nsIContent* aEventTargetContent,
WidgetSelectionEvent* aSelectionEvent) {
nsIContent* eventTargetContent =
aEventTargetContent ? aEventTargetContent : GetRootContent(aPresContext);
RefPtr<TabParent> tabParent =
eventTargetContent ? TabParent::GetFrom(eventTargetContent) : nullptr;
MOZ_LOG(sISMLog, LogLevel::Info,
("HandleSelectionEvent(aPresContext=0x%p, "
"aEventTargetContent=0x%p, aSelectionEvent={ mMessage=%s, "
"mFlags={ mIsTrusted=%s } }), tabParent=%p",
aPresContext, aEventTargetContent, ToChar(aSelectionEvent->mMessage),
GetBoolName(aSelectionEvent->mFlags.mIsTrusted), tabParent.get()));
if (!aSelectionEvent->IsTrusted()) {
return;
}
RefPtr<TextComposition> composition =
sTextCompositions
? sTextCompositions->GetCompositionFor(aSelectionEvent->mWidget)
: nullptr;
if (composition) {
// When there is a composition, TextComposition should guarantee that the
// selection event will be handled in same target as composition events.
composition->HandleSelectionEvent(aSelectionEvent);
} else {
// When there is no composition, the selection event should be handled
// in the aPresContext or tabParent.
TextComposition::HandleSelectionEvent(aPresContext, tabParent,
aSelectionEvent);
}
}
// static
void IMEStateManager::OnCompositionEventDiscarded(
WidgetCompositionEvent* aCompositionEvent) {
// Note that this method is never called for synthesized events for emulating
// commit or cancel composition.
MOZ_LOG(
sISMLog, LogLevel::Info,
("OnCompositionEventDiscarded(aCompositionEvent={ "
"mMessage=%s, mNativeIMEContext={ mRawNativeIMEContext=0x%" PRIXPTR ", "
"mOriginProcessID=0x%" PRIX64 " }, mWidget(0x%p)={ "
"GetNativeIMEContext()={ mRawNativeIMEContext=0x%" PRIXPTR ", "
"mOriginProcessID=0x%" PRIX64 " }, Destroyed()=%s }, "
"mFlags={ mIsTrusted=%s } })",
ToChar(aCompositionEvent->mMessage),
aCompositionEvent->mNativeIMEContext.mRawNativeIMEContext,
aCompositionEvent->mNativeIMEContext.mOriginProcessID,
aCompositionEvent->mWidget.get(),
aCompositionEvent->mWidget->GetNativeIMEContext().mRawNativeIMEContext,
aCompositionEvent->mWidget->GetNativeIMEContext().mOriginProcessID,
GetBoolName(aCompositionEvent->mWidget->Destroyed()),
GetBoolName(aCompositionEvent->mFlags.mIsTrusted)));
if (!aCompositionEvent->IsTrusted()) {
return;
}
// Ignore compositionstart for now because sTextCompositions may not have
// been created yet.
if (aCompositionEvent->mMessage == eCompositionStart) {
return;
}
RefPtr<TextComposition> composition =
sTextCompositions->GetCompositionFor(aCompositionEvent->mWidget);
if (!composition) {
// If the PresShell has been being destroyed during composition,
// a TextComposition instance for the composition was already removed from
// the array and destroyed in OnDestroyPresContext(). Therefore, we may
// fail to retrieve a TextComposition instance here.
MOZ_LOG(sISMLog, LogLevel::Info,
(" OnCompositionEventDiscarded(), "
"TextComposition instance for the widget has already gone"));
return;
}
composition->OnCompositionEventDiscarded(aCompositionEvent);
}
// static
nsresult IMEStateManager::NotifyIME(IMEMessage aMessage, nsIWidget* aWidget,
TabParent* aTabParent) {
return IMEStateManager::NotifyIME(IMENotification(aMessage), aWidget,
aTabParent);
}
// static
nsresult IMEStateManager::NotifyIME(const IMENotification& aNotification,
nsIWidget* aWidget, TabParent* aTabParent) {
MOZ_LOG(
sISMLog, LogLevel::Info,
("NotifyIME(aNotification={ mMessage=%s }, "
"aWidget=0x%p, aTabParent=0x%p), sFocusedIMEWidget=0x%p, "
"sActiveTabParent=0x%p, sFocusedIMETabParent=0x%p, "
"IsSameProcess(aTabParent, sActiveTabParent)=%s, "
"IsSameProcess(aTabParent, sFocusedIMETabParent)=%s",
ToChar(aNotification.mMessage), aWidget, aTabParent, sFocusedIMEWidget,
sActiveTabParent.get(), sFocusedIMETabParent.get(),
GetBoolName(IsSameProcess(aTabParent, sActiveTabParent)),
GetBoolName(IsSameProcess(aTabParent, sFocusedIMETabParent))));
if (NS_WARN_IF(!aWidget)) {
MOZ_LOG(sISMLog, LogLevel::Error,
(" NotifyIME(), FAILED due to no widget"));
return NS_ERROR_INVALID_ARG;
}
switch (aNotification.mMessage) {
case NOTIFY_IME_OF_FOCUS: {
// If focus notification comes from a remote process which already lost
// focus, we shouldn't accept the focus notification. Then, following
// notifications from the process will be ignored.
if (NS_WARN_IF(!IsSameProcess(aTabParent, sActiveTabParent))) {
MOZ_ASSERT(
aTabParent,
"Why was the input context initialized for a remote process but "
"does this process get IME focus?");
MOZ_LOG(
sISMLog, LogLevel::Warning,
(" NotifyIME(), WARNING, the received focus notification is "
"ignored "
"because input context was initialized for %s, perhaps, it came "
"from a busy remote process",
sActiveTabParent ? "another remote process" : "current process"));
return NS_OK;
}
// If there is pending blur notification for current focused IME,
// we should notify IME of blur by ourselves. Then, we should ignore
// following notifications coming from the process.
if (sFocusedIMEWidget) {
MOZ_ASSERT(
sFocusedIMETabParent || aTabParent,
"This case shouldn't be caused by focus move in this process");
nsCOMPtr<nsIWidget> focusedIMEWidget(sFocusedIMEWidget);
sFocusedIMEWidget = nullptr;
sFocusedIMETabParent = nullptr;
focusedIMEWidget->NotifyIME(IMENotification(NOTIFY_IME_OF_BLUR));
}
sFocusedIMETabParent = aTabParent;
sFocusedIMEWidget = aWidget;
nsCOMPtr<nsIWidget> widget(aWidget);
return widget->NotifyIME(aNotification);
}
case NOTIFY_IME_OF_BLUR: {
if (!IsSameProcess(aTabParent, sFocusedIMETabParent)) {
MOZ_LOG(sISMLog, LogLevel::Warning,
(" NotifyIME(), WARNING, the received blur notification is "
"ignored "
"because it's not from current focused IME process"));
return NS_OK;
}
if (!sFocusedIMEWidget) {
MOZ_LOG(
sISMLog, LogLevel::Error,
(" NotifyIME(), WARNING, received blur notification but there is "
"no focused IME widget"));
return NS_OK;
}
if (NS_WARN_IF(sFocusedIMEWidget != aWidget)) {
MOZ_LOG(sISMLog, LogLevel::Warning,
(" NotifyIME(), WARNING, the received blur notification is "
"ignored "
"because it's not for current focused IME widget"));
return NS_OK;
}
nsCOMPtr<nsIWidget> focusedIMEWidget(sFocusedIMEWidget);
sFocusedIMEWidget = nullptr;
sFocusedIMETabParent = nullptr;
return focusedIMEWidget->NotifyIME(IMENotification(NOTIFY_IME_OF_BLUR));
}
case NOTIFY_IME_OF_SELECTION_CHANGE:
case NOTIFY_IME_OF_TEXT_CHANGE:
case NOTIFY_IME_OF_POSITION_CHANGE:
case NOTIFY_IME_OF_MOUSE_BUTTON_EVENT:
case NOTIFY_IME_OF_COMPOSITION_EVENT_HANDLED: {
if (!IsSameProcess(aTabParent, sFocusedIMETabParent)) {
MOZ_LOG(
sISMLog, LogLevel::Warning,
(" NotifyIME(), WARNING, the received content change notification "
"is ignored because it's not from current focused IME process"));
return NS_OK;
}
if (!sFocusedIMEWidget) {
MOZ_LOG(
sISMLog, LogLevel::Warning,
(" NotifyIME(), WARNING, the received content change notification "
"is ignored because there is no focused IME widget"));
return NS_OK;
}
if (NS_WARN_IF(sFocusedIMEWidget != aWidget)) {
MOZ_LOG(
sISMLog, LogLevel::Warning,
(" NotifyIME(), WARNING, the received content change notification "
"is ignored because it's not for current focused IME widget"));
return NS_OK;
}
nsCOMPtr<nsIWidget> widget(aWidget);
return widget->NotifyIME(aNotification);
}
default:
// Other notifications should be sent only when there is composition.
// So, we need to handle the others below.
break;
}
if (!sTextCompositions) {
MOZ_LOG(sISMLog, LogLevel::Info,
(" NotifyIME(), the request to IME is ignored because "
"there have been no compositions yet"));
return NS_OK;
}
RefPtr<TextComposition> composition =
sTextCompositions->GetCompositionFor(aWidget);
if (!composition) {
MOZ_LOG(sISMLog, LogLevel::Info,
(" NotifyIME(), the request to IME is ignored because "
"there is no active composition"));
return NS_OK;
}
if (!IsSameProcess(aTabParent, composition->GetTabParent())) {
MOZ_LOG(
sISMLog, LogLevel::Warning,
(" NotifyIME(), WARNING, the request to IME is ignored because "
"it does not come from the remote process which has the composition "
"on aWidget"));
return NS_OK;
}
switch (aNotification.mMessage) {
case REQUEST_TO_COMMIT_COMPOSITION:
return composition->RequestToCommit(aWidget, false);
case REQUEST_TO_CANCEL_COMPOSITION:
return composition->RequestToCommit(aWidget, true);
default:
MOZ_CRASH("Unsupported notification");
}
MOZ_CRASH(
"Failed to handle the notification for non-synthesized composition");
return NS_ERROR_FAILURE;
}
// static
nsresult IMEStateManager::NotifyIME(IMEMessage aMessage,
nsPresContext* aPresContext,
TabParent* aTabParent) {
MOZ_LOG(sISMLog, LogLevel::Info,
("NotifyIME(aMessage=%s, aPresContext=0x%p, aTabParent=0x%p)",
ToChar(aMessage), aPresContext, aTabParent));
if (NS_WARN_IF(!CanHandleWith(aPresContext))) {
return NS_ERROR_INVALID_ARG;
}
nsIWidget* widget = aPresContext->GetRootWidget();
if (NS_WARN_IF(!widget)) {
MOZ_LOG(sISMLog, LogLevel::Error,
(" NotifyIME(), FAILED due to no widget for the "
"nsPresContext"));
return NS_ERROR_NOT_AVAILABLE;
}
return NotifyIME(aMessage, widget, aTabParent);
}
// static
bool IMEStateManager::IsEditable(nsINode* node) {
if (node->IsEditable()) {
return true;
}
// |node| might be readwrite (for example, a text control)
if (node->IsElement() &&
node->AsElement()->State().HasState(NS_EVENT_STATE_MOZ_READWRITE)) {
return true;
}
return false;
}
// static
nsINode* IMEStateManager::GetRootEditableNode(nsPresContext* aPresContext,
nsIContent* aContent) {
if (aContent) {
nsINode* root = nullptr;
nsINode* node = aContent;
while (node && IsEditable(node)) {
// If the node has independent selection like <input type="text"> or
// <textarea>, the node should be the root editable node for aContent.
// FYI: <select> element also has independent selection but IsEditable()
// returns false.
// XXX: If somebody adds new editable element which has independent
// selection but doesn't own editor, we'll need more checks here.
if (node->IsContent() && node->AsContent()->HasIndependentSelection()) {
return node;
}
root = node;
node = node->GetParentNode();
}
return root;
}
if (aPresContext) {
nsIDocument* document = aPresContext->Document();
if (document && document->IsEditable()) {
return document;
}
}
return nullptr;
}
// static
bool IMEStateManager::IsIMEObserverNeeded(const IMEState& aState) {
return aState.MaybeEditable();
}
// static
void IMEStateManager::DestroyIMEContentObserver() {
MOZ_LOG(sISMLog, LogLevel::Info,
("DestroyIMEContentObserver(), sActiveIMEContentObserver=0x%p",
sActiveIMEContentObserver.get()));
if (!sActiveIMEContentObserver) {
MOZ_LOG(sISMLog, LogLevel::Debug,
(" DestroyIMEContentObserver() does nothing"));
return;
}
MOZ_LOG(sISMLog, LogLevel::Debug,
(" DestroyIMEContentObserver(), destroying "
"the active IMEContentObserver..."));
RefPtr<IMEContentObserver> tsm = sActiveIMEContentObserver.get();
sActiveIMEContentObserver = nullptr;
tsm->Destroy();
}
// static
void IMEStateManager::CreateIMEContentObserver(EditorBase* aEditorBase) {
MOZ_LOG(sISMLog, LogLevel::Info,
("CreateIMEContentObserver(aEditorBase=0x%p), "
"sPresContext=0x%p, sContent=0x%p, sWidget=0x%p (available: %s), "
"sActiveIMEContentObserver=0x%p, "
"sActiveIMEContentObserver->IsManaging(sPresContext, sContent)=%s",
aEditorBase, sPresContext.get(), sContent.get(), sWidget,
GetBoolName(sWidget && !sWidget->Destroyed()),
sActiveIMEContentObserver.get(),
GetBoolName(sActiveIMEContentObserver
? sActiveIMEContentObserver->IsManaging(sPresContext,
sContent)
: false)));
if (NS_WARN_IF(sActiveIMEContentObserver)) {
MOZ_LOG(sISMLog, LogLevel::Error,
(" CreateIMEContentObserver(), FAILED due to "
"there is already an active IMEContentObserver"));
MOZ_ASSERT(sActiveIMEContentObserver->IsManaging(sPresContext, sContent));
return;
}
if (!sWidget || NS_WARN_IF(sWidget->Destroyed())) {
MOZ_LOG(sISMLog, LogLevel::Error,
(" CreateIMEContentObserver(), FAILED due to "
"the widget for the nsPresContext has gone"));
return; // Sometimes, there are no widgets.
}
nsCOMPtr<nsIWidget> widget(sWidget);
// If it's not text editable, we don't need to create IMEContentObserver.
if (!IsIMEObserverNeeded(widget->GetInputContext().mIMEState)) {
MOZ_LOG(sISMLog, LogLevel::Debug,
(" CreateIMEContentObserver() doesn't create "
"IMEContentObserver because of non-editable IME state"));
return;
}
if (NS_WARN_IF(widget->Destroyed())) {
MOZ_LOG(sISMLog, LogLevel::Error,
(" CreateIMEContentObserver(), FAILED due to "
"the widget for the nsPresContext has gone"));
return;
}
MOZ_ASSERT(sPresContext->GetRootWidget() == widget);
MOZ_LOG(sISMLog, LogLevel::Debug,
(" CreateIMEContentObserver() is creating an "
"IMEContentObserver instance..."));
sActiveIMEContentObserver = new IMEContentObserver();
// IMEContentObserver::Init() might create another IMEContentObserver
// instance. So, sActiveIMEContentObserver would be replaced with new one.
// We should hold the current instance here.
RefPtr<IMEContentObserver> activeIMEContentObserver(
sActiveIMEContentObserver);
activeIMEContentObserver->Init(widget, sPresContext, sContent, aEditorBase);
}
// static
nsresult IMEStateManager::GetFocusSelectionAndRoot(nsISelection** aSelection,
nsIContent** aRootContent) {
if (!sActiveIMEContentObserver) {
return NS_ERROR_NOT_AVAILABLE;
}
return sActiveIMEContentObserver->GetSelectionAndRoot(aSelection,
aRootContent);
}
// static
already_AddRefed<TextComposition> IMEStateManager::GetTextCompositionFor(
nsIWidget* aWidget) {
if (!sTextCompositions) {
return nullptr;
}
RefPtr<TextComposition> textComposition =
sTextCompositions->GetCompositionFor(aWidget);
return textComposition.forget();
}
// static
already_AddRefed<TextComposition> IMEStateManager::GetTextCompositionFor(
const WidgetCompositionEvent* aCompositionEvent) {
if (!sTextCompositions) {
return nullptr;
}
RefPtr<TextComposition> textComposition =
sTextCompositions->GetCompositionFor(aCompositionEvent);
return textComposition.forget();
}
// static
already_AddRefed<TextComposition> IMEStateManager::GetTextCompositionFor(
nsPresContext* aPresContext) {
if (!sTextCompositions) {
return nullptr;
}
RefPtr<TextComposition> textComposition =
sTextCompositions->GetCompositionFor(aPresContext);
return textComposition.forget();
}
} // namespace mozilla