NS_IMETHODIMP
TextComposition::CompositionEventDispatcher::Run()
{
if (!mPresContext->GetPresShell() ||
mPresContext->GetPresShell()->IsDestroying()) {
return NS_OK; // cannot dispatch any events anymore
}
nsEventStatus status = nsEventStatus_eIgnore;
switch (mEventMessage) {
case NS_COMPOSITION_START: {
nsCompositionEvent compStart(true, NS_COMPOSITION_START, mWidget);
nsQueryContentEvent selectedText(true, NS_QUERY_SELECTED_TEXT, mWidget);
nsContentEventHandler handler(mPresContext);
handler.OnQuerySelectedText(&selectedText);
NS_ASSERTION(selectedText.mSucceeded, "Failed to get selected text");
compStart.data = selectedText.mReply.mString;
nsIMEStateManager::DispatchCompositionEvent(mEventTarget, mPresContext,
&compStart, &status, nullptr);
break;
}
case NS_COMPOSITION_UPDATE:
case NS_COMPOSITION_END: {
nsCompositionEvent compEvent(true, mEventMessage, mWidget);
compEvent.data = mData;
nsIMEStateManager::DispatchCompositionEvent(mEventTarget, mPresContext,
&compEvent, &status, nullptr);
break;
}
case NS_TEXT_TEXT: {
nsTextEvent textEvent(true, NS_TEXT_TEXT, mWidget);
textEvent.theText = mData;
nsIMEStateManager::DispatchCompositionEvent(mEventTarget, mPresContext,
&textEvent, &status, nullptr);
break;
}
default:
MOZ_NOT_REACHED("Unsupported event");
break;
}
return NS_OK;
}
NS_IMETHODIMP
TextComposition::CompositionEventDispatcher::Run()
{
nsRefPtr<nsPresContext> presContext = mTextComposition->mPresContext;
if (!presContext || !presContext->GetPresShell() ||
presContext->GetPresShell()->IsDestroying()) {
return NS_OK; // cannot dispatch any events anymore
}
// The widget can be different from the widget which has dispatched
// composition events because GetWidget() returns a widget which is proper
// for calling NotifyIME(). However, this must no be problem since both
// widget should share native IME context. Therefore, even if an event
// handler uses the widget for requesting IME to commit or cancel, it works.
nsCOMPtr<nsIWidget> widget(mTextComposition->GetWidget());
if (NS_WARN_IF(!widget)) {
return NS_OK; // cannot dispatch any events anymore
}
nsEventStatus status = nsEventStatus_eIgnore;
switch (mEventMessage) {
case NS_COMPOSITION_START: {
WidgetCompositionEvent compStart(true, NS_COMPOSITION_START, widget);
WidgetQueryContentEvent selectedText(true, NS_QUERY_SELECTED_TEXT,
widget);
ContentEventHandler handler(presContext);
handler.OnQuerySelectedText(&selectedText);
NS_ASSERTION(selectedText.mSucceeded, "Failed to get selected text");
compStart.data = selectedText.mReply.mString;
compStart.mFlags.mIsSynthesizedForTests =
mTextComposition->IsSynthesizedForTests();
IMEStateManager::DispatchCompositionEvent(mEventTarget, presContext,
&compStart, &status, nullptr,
mIsSynthesizedEvent);
break;
}
case NS_COMPOSITION_UPDATE:
case NS_COMPOSITION_END: {
WidgetCompositionEvent compEvent(true, mEventMessage, widget);
compEvent.data = mData;
compEvent.mFlags.mIsSynthesizedForTests =
mTextComposition->IsSynthesizedForTests();
IMEStateManager::DispatchCompositionEvent(mEventTarget, presContext,
&compEvent, &status, nullptr,
mIsSynthesizedEvent);
break;
}
case NS_TEXT_TEXT: {
WidgetTextEvent textEvent(true, NS_TEXT_TEXT, widget);
textEvent.theText = mData;
textEvent.mFlags.mIsSynthesizedForTests =
mTextComposition->IsSynthesizedForTests();
IMEStateManager::DispatchCompositionEvent(mEventTarget, presContext,
&textEvent, &status, nullptr,
mIsSynthesizedEvent);
break;
}
default:
MOZ_CRASH("Unsupported event");
}
return NS_OK;
}
nsresult
TextComposition::RequestToCommit(nsIWidget* aWidget, bool aDiscard)
{
// If this composition is already requested to be committed or canceled,
// we don't need to request it again because even if the first request
// failed, new request won't success, probably. And we shouldn't synthesize
// events for committing or canceling composition twice or more times.
if (mRequestedToCommitOrCancel) {
return NS_OK;
}
nsRefPtr<TextComposition> kungFuDeathGrip(this);
const nsAutoString lastData(mLastData);
{
AutoRestore<bool> saveRequestingCancel(mIsRequestingCancel);
AutoRestore<bool> saveRequestingCommit(mIsRequestingCommit);
if (aDiscard) {
mIsRequestingCancel = true;
mIsRequestingCommit = false;
} else {
mIsRequestingCancel = false;
mIsRequestingCommit = true;
}
if (!mIsSynthesizedForTests) {
// FYI: CompositionEvent and TextEvent caused by a call of NotifyIME()
// may be discarded by PresShell if it's not safe to dispatch the
// event.
nsresult rv =
aWidget->NotifyIME(IMENotification(aDiscard ?
REQUEST_TO_CANCEL_COMPOSITION :
REQUEST_TO_COMMIT_COMPOSITION));
if (rv == NS_ERROR_NOT_IMPLEMENTED) {
return rv;
}
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
} else {
// Emulates to commit or cancel the composition
// FYI: These events may be discarded by PresShell if it's not safe to
// dispatch the event.
nsCOMPtr<nsIWidget> widget(aWidget);
nsAutoString commitData(aDiscard ? EmptyString() : lastData);
bool changingData = lastData != commitData;
WidgetTextEvent textEvent(true, NS_TEXT_TEXT, widget);
textEvent.theText = commitData;
textEvent.mFlags.mIsSynthesizedForTests = true;
MaybeDispatchCompositionUpdate(&textEvent);
// If changing the data or committing string isn't empty, we need to
// dispatch text event for setting the composition string without
// IME selection.
if (!Destroyed() && !widget->Destroyed() &&
(changingData || !commitData.IsEmpty())) {
nsEventStatus status = nsEventStatus_eIgnore;
widget->DispatchEvent(&textEvent, status);
}
if (!Destroyed() && !widget->Destroyed()) {
nsEventStatus status = nsEventStatus_eIgnore;
WidgetCompositionEvent endEvent(true, NS_COMPOSITION_END, widget);
endEvent.data = commitData;
endEvent.mFlags.mIsSynthesizedForTests = true;
widget->DispatchEvent(&endEvent, status);
}
}
}
mRequestedToCommitOrCancel = true;
// If the request is performed synchronously, this must be already destroyed.
if (Destroyed()) {
return NS_OK;
}
// Otherwise, synthesize the commit in content.
nsAutoString data(aDiscard ? EmptyString() : lastData);
bool changingData = lastData != data;
if (changingData) {
DispatchCompositionEventRunnable(NS_COMPOSITION_UPDATE, data, true);
}
// If the last composition string and new data are different, we need to
// dispatch text event for removing IME selection. However, if the commit
// string is empty string and it's not changed from the last data, we don't
// need to dispatch text event.
if (changingData || !data.IsEmpty()) {
DispatchCompositionEventRunnable(NS_TEXT_TEXT, data, true);
}
DispatchCompositionEventRunnable(NS_COMPOSITION_END, data, true);
return NS_OK;
}
