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gecko-dev/dom/base/TextInputProcessor.cpp

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/* -*- 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 "gfxPrefs.h"
#include "mozilla/dom/Event.h"
#include "mozilla/EventForwards.h"
#include "mozilla/TextEventDispatcher.h"
#include "mozilla/TextEvents.h"
#include "mozilla/TextInputProcessor.h"
#include "mozilla/widget/IMEData.h"
#include "mozilla/dom/KeyboardEvent.h"
#include "nsContentUtils.h"
#include "nsIDocShell.h"
#include "nsIWidget.h"
#include "nsPIDOMWindow.h"
#include "nsPresContext.h"
using mozilla::dom::KeyboardEvent;
using namespace mozilla::widget;
namespace mozilla {
/******************************************************************************
* TextInputProcessorNotification
******************************************************************************/
class TextInputProcessorNotification final :
public nsITextInputProcessorNotification
{
typedef IMENotification::SelectionChangeData SelectionChangeData;
typedef IMENotification::SelectionChangeDataBase SelectionChangeDataBase;
typedef IMENotification::TextChangeData TextChangeData;
typedef IMENotification::TextChangeDataBase TextChangeDataBase;
public:
explicit TextInputProcessorNotification(const char* aType)
: mType(aType)
{
}
explicit TextInputProcessorNotification(
const TextChangeDataBase& aTextChangeData)
: mType("notify-text-change")
, mTextChangeData(aTextChangeData)
{
}
explicit TextInputProcessorNotification(
const SelectionChangeDataBase& aSelectionChangeData)
: mType("notify-selection-change")
, mSelectionChangeData(aSelectionChangeData)
{
// SelectionChangeDataBase::mString still refers nsString instance owned
// by aSelectionChangeData. So, this needs to copy the instance.
nsString* string = new nsString(aSelectionChangeData.String());
mSelectionChangeData.mString = string;
}
NS_DECL_ISUPPORTS
NS_IMETHOD GetType(nsACString& aType) final
{
aType = mType;
return NS_OK;
}
// "notify-text-change" and "notify-selection-change"
NS_IMETHOD GetOffset(uint32_t* aOffset) final
{
if (NS_WARN_IF(!aOffset)) {
return NS_ERROR_INVALID_ARG;
}
if (IsSelectionChange()) {
*aOffset = mSelectionChangeData.mOffset;
return NS_OK;
}
if (IsTextChange()) {
*aOffset = mTextChangeData.mStartOffset;
return NS_OK;
}
return NS_ERROR_NOT_AVAILABLE;
}
// "notify-selection-change"
NS_IMETHOD GetText(nsAString& aText) final
{
if (IsSelectionChange()) {
aText = mSelectionChangeData.String();
return NS_OK;
}
return NS_ERROR_NOT_AVAILABLE;
}
NS_IMETHOD GetCollapsed(bool* aCollapsed) final
{
if (NS_WARN_IF(!aCollapsed)) {
return NS_ERROR_INVALID_ARG;
}
if (IsSelectionChange()) {
*aCollapsed = mSelectionChangeData.IsCollapsed();
return NS_OK;
}
return NS_ERROR_NOT_AVAILABLE;
}
NS_IMETHOD GetLength(uint32_t* aLength) final
{
if (NS_WARN_IF(!aLength)) {
return NS_ERROR_INVALID_ARG;
}
if (IsSelectionChange()) {
*aLength = mSelectionChangeData.Length();
return NS_OK;
}
return NS_ERROR_NOT_AVAILABLE;
}
NS_IMETHOD GetReversed(bool* aReversed) final
{
if (NS_WARN_IF(!aReversed)) {
return NS_ERROR_INVALID_ARG;
}
if (IsSelectionChange()) {
*aReversed = mSelectionChangeData.mReversed;
return NS_OK;
}
return NS_ERROR_NOT_AVAILABLE;
}
NS_IMETHOD GetWritingMode(nsACString& aWritingMode) final
{
if (IsSelectionChange()) {
WritingMode writingMode = mSelectionChangeData.GetWritingMode();
if (!writingMode.IsVertical()) {
aWritingMode.AssignLiteral("horizontal-tb");
} else if (writingMode.IsVerticalLR()) {
aWritingMode.AssignLiteral("vertical-lr");
} else {
aWritingMode.AssignLiteral("vertical-rl");
}
return NS_OK;
}
return NS_ERROR_NOT_AVAILABLE;
}
NS_IMETHOD GetCausedByComposition(bool* aCausedByComposition) final
{
if (NS_WARN_IF(!aCausedByComposition)) {
return NS_ERROR_INVALID_ARG;
}
if (IsSelectionChange()) {
*aCausedByComposition = mSelectionChangeData.mCausedByComposition;
return NS_OK;
}
return NS_ERROR_NOT_AVAILABLE;
}
NS_IMETHOD GetCausedBySelectionEvent(
bool* aCausedBySelectionEvent) final
{
if (NS_WARN_IF(!aCausedBySelectionEvent)) {
return NS_ERROR_INVALID_ARG;
}
if (IsSelectionChange()) {
*aCausedBySelectionEvent = mSelectionChangeData.mCausedBySelectionEvent;
return NS_OK;
}
return NS_ERROR_NOT_AVAILABLE;
}
NS_IMETHOD GetOccurredDuringComposition(
bool* aOccurredDuringComposition) final
{
if (NS_WARN_IF(!aOccurredDuringComposition)) {
return NS_ERROR_INVALID_ARG;
}
if (IsSelectionChange()) {
*aOccurredDuringComposition =
mSelectionChangeData.mOccurredDuringComposition;
return NS_OK;
}
return NS_ERROR_NOT_AVAILABLE;
}
// "notify-text-change"
NS_IMETHOD GetRemovedLength(uint32_t* aLength) final
{
if (NS_WARN_IF(!aLength)) {
return NS_ERROR_INVALID_ARG;
}
if (IsTextChange()) {
*aLength = mTextChangeData.OldLength();
return NS_OK;
}
return NS_ERROR_NOT_AVAILABLE;
}
NS_IMETHOD GetAddedLength(uint32_t* aLength) final
{
if (NS_WARN_IF(!aLength)) {
return NS_ERROR_INVALID_ARG;
}
if (IsTextChange()) {
*aLength = mTextChangeData.NewLength();
return NS_OK;
}
return NS_ERROR_NOT_AVAILABLE;
}
NS_IMETHOD GetCausedOnlyByComposition(
bool* aCausedOnlyByComposition) final
{
if (NS_WARN_IF(!aCausedOnlyByComposition)) {
return NS_ERROR_INVALID_ARG;
}
if (IsTextChange()) {
*aCausedOnlyByComposition = mTextChangeData.mCausedOnlyByComposition;
return NS_OK;
}
return NS_ERROR_NOT_AVAILABLE;
}
NS_IMETHOD GetIncludingChangesDuringComposition(
bool* aIncludingChangesDuringComposition) final
{
if (NS_WARN_IF(!aIncludingChangesDuringComposition)) {
return NS_ERROR_INVALID_ARG;
}
if (IsTextChange()) {
*aIncludingChangesDuringComposition =
mTextChangeData.mIncludingChangesDuringComposition;
return NS_OK;
}
return NS_ERROR_NOT_AVAILABLE;
}
NS_IMETHOD GetIncludingChangesWithoutComposition(
bool* aIncludingChangesWithoutComposition) final
{
if (NS_WARN_IF(!aIncludingChangesWithoutComposition)) {
return NS_ERROR_INVALID_ARG;
}
if (IsTextChange()) {
*aIncludingChangesWithoutComposition =
mTextChangeData.mIncludingChangesWithoutComposition;
return NS_OK;
}
return NS_ERROR_NOT_AVAILABLE;
}
protected:
virtual ~TextInputProcessorNotification()
{
if (IsSelectionChange()) {
delete mSelectionChangeData.mString;
mSelectionChangeData.mString = nullptr;
}
}
bool IsTextChange() const
{
return mType.EqualsLiteral("notify-text-change");
}
bool IsSelectionChange() const
{
return mType.EqualsLiteral("notify-selection-change");
}
private:
nsAutoCString mType;
union
{
TextChangeDataBase mTextChangeData;
SelectionChangeDataBase mSelectionChangeData;
};
TextInputProcessorNotification() { }
};
NS_IMPL_ISUPPORTS(TextInputProcessorNotification,
nsITextInputProcessorNotification)
/******************************************************************************
* TextInputProcessor
******************************************************************************/
NS_IMPL_ISUPPORTS(TextInputProcessor,
nsITextInputProcessor,
TextEventDispatcherListener,
nsISupportsWeakReference)
TextInputProcessor::TextInputProcessor()
: mDispatcher(nullptr)
, mForTests(false)
{
}
TextInputProcessor::~TextInputProcessor()
{
if (mDispatcher && mDispatcher->IsComposing()) {
// If this is composing and not canceling the composition, nobody can steal
// the rights of TextEventDispatcher from this instance. Therefore, this
// needs to cancel the composition here.
if (NS_SUCCEEDED(IsValidStateForComposition())) {
RefPtr<TextEventDispatcher> kungFuDeathGrip(mDispatcher);
nsEventStatus status = nsEventStatus_eIgnore;
kungFuDeathGrip->CommitComposition(status, &EmptyString());
}
}
}
bool
TextInputProcessor::IsComposing() const
{
return mDispatcher && mDispatcher->IsComposing();
}
NS_IMETHODIMP
TextInputProcessor::GetHasComposition(bool* aHasComposition)
{
MOZ_RELEASE_ASSERT(aHasComposition, "aHasComposition must not be nullptr");
MOZ_RELEASE_ASSERT(nsContentUtils::IsCallerChrome());
*aHasComposition = IsComposing();
return NS_OK;
}
NS_IMETHODIMP
TextInputProcessor::BeginInputTransaction(
mozIDOMWindow* aWindow,
nsITextInputProcessorCallback* aCallback,
bool* aSucceeded)
{
MOZ_RELEASE_ASSERT(aSucceeded, "aSucceeded must not be nullptr");
MOZ_RELEASE_ASSERT(nsContentUtils::IsCallerChrome());
if (NS_WARN_IF(!aCallback)) {
*aSucceeded = false;
return NS_ERROR_INVALID_ARG;
}
return BeginInputTransactionInternal(aWindow, aCallback, false, *aSucceeded);
}
NS_IMETHODIMP
TextInputProcessor::BeginInputTransactionForTests(
mozIDOMWindow* aWindow,
nsITextInputProcessorCallback* aCallback,
uint8_t aOptionalArgc,
bool* aSucceeded)
{
MOZ_RELEASE_ASSERT(aSucceeded, "aSucceeded must not be nullptr");
MOZ_RELEASE_ASSERT(nsContentUtils::IsCallerChrome());
nsITextInputProcessorCallback* callback =
aOptionalArgc >= 1 ? aCallback : nullptr;
return BeginInputTransactionInternal(aWindow, callback, true, *aSucceeded);
}
nsresult
TextInputProcessor::BeginInputTransactionInternal(
mozIDOMWindow* aWindow,
nsITextInputProcessorCallback* aCallback,
bool aForTests,
bool& aSucceeded)
{
aSucceeded = false;
if (NS_WARN_IF(!aWindow)) {
return NS_ERROR_INVALID_ARG;
}
nsCOMPtr<nsPIDOMWindowInner> pWindow = nsPIDOMWindowInner::From(aWindow);
if (NS_WARN_IF(!pWindow)) {
return NS_ERROR_INVALID_ARG;
}
nsCOMPtr<nsIDocShell> docShell(pWindow->GetDocShell());
if (NS_WARN_IF(!docShell)) {
return NS_ERROR_FAILURE;
}
RefPtr<nsPresContext> presContext;
nsresult rv = docShell->GetPresContext(getter_AddRefs(presContext));
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (NS_WARN_IF(!presContext)) {
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsIWidget> widget = presContext->GetRootWidget();
if (NS_WARN_IF(!widget)) {
return NS_ERROR_FAILURE;
}
RefPtr<TextEventDispatcher> dispatcher = widget->GetTextEventDispatcher();
MOZ_RELEASE_ASSERT(dispatcher, "TextEventDispatcher must not be null");
// If the instance was initialized and is being initialized for same
// dispatcher and same purpose, we don't need to initialize the dispatcher
// again.
if (mDispatcher && dispatcher == mDispatcher && aCallback == mCallback &&
aForTests == mForTests) {
aSucceeded = true;
return NS_OK;
}
// If this instance is composing or dispatching an event, don't allow to
// initialize again. Especially, if we allow to begin input transaction with
// another TextEventDispatcher during dispatching an event, it may cause that
// nobody cannot begin input transaction with it if the last event causes
// opening modal dialog.
if (mDispatcher &&
(mDispatcher->IsComposing() || mDispatcher->IsDispatchingEvent())) {
return NS_ERROR_ALREADY_INITIALIZED;
}
// And also if another instance is composing with the new dispatcher or
// dispatching an event, it'll fail to steal its ownership. Then, we should
// not throw an exception, just return false.
if (dispatcher->IsComposing() || dispatcher->IsDispatchingEvent()) {
return NS_OK;
}
// This instance has finished preparing to link to the dispatcher. Therefore,
// let's forget the old dispatcher and purpose.
if (mDispatcher) {
mDispatcher->EndInputTransaction(this);
if (NS_WARN_IF(mDispatcher)) {
// Forcibly initialize the members if we failed to end the input
// transaction.
UnlinkFromTextEventDispatcher();
}
}
if (aForTests) {
bool isAPZAware = gfxPrefs::TestEventsAsyncEnabled();
rv = dispatcher->BeginTestInputTransaction(this, isAPZAware);
} else {
rv = dispatcher->BeginInputTransaction(this);
}
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
mDispatcher = dispatcher;
mCallback = aCallback;
mForTests = aForTests;
aSucceeded = true;
return NS_OK;
}
void
TextInputProcessor::UnlinkFromTextEventDispatcher()
{
mDispatcher = nullptr;
mForTests = false;
if (mCallback) {
nsCOMPtr<nsITextInputProcessorCallback> callback(mCallback);
mCallback = nullptr;
RefPtr<TextInputProcessorNotification> notification =
new TextInputProcessorNotification("notify-end-input-transaction");
bool result = false;
callback->OnNotify(this, notification, &result);
}
}
nsresult
TextInputProcessor::IsValidStateForComposition()
{
if (NS_WARN_IF(!mDispatcher)) {
return NS_ERROR_NOT_INITIALIZED;
}
nsresult rv = mDispatcher->GetState();
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
bool
TextInputProcessor::IsValidEventTypeForComposition(
const WidgetKeyboardEvent& aKeyboardEvent) const
{
// The key event type of composition methods must be "", "keydown" or "keyup".
if (aKeyboardEvent.mMessage == eKeyDown ||
aKeyboardEvent.mMessage == eKeyUp) {
return true;
}
if (aKeyboardEvent.mMessage == eUnidentifiedEvent &&
aKeyboardEvent.mSpecifiedEventType &&
nsDependentAtomString(
aKeyboardEvent.mSpecifiedEventType).EqualsLiteral("on")) {
return true;
}
return false;
}
TextInputProcessor::EventDispatcherResult
TextInputProcessor::MaybeDispatchKeydownForComposition(
const WidgetKeyboardEvent* aKeyboardEvent,
uint32_t aKeyFlags)
{
EventDispatcherResult result;
result.mResult = IsValidStateForComposition();
if (NS_WARN_IF(NS_FAILED(result.mResult))) {
result.mCanContinue = false;
return result;
}
if (!aKeyboardEvent) {
return result;
}
// If the mMessage is eKeyUp, the caller doesn't want TIP to dispatch
// eKeyDown event.
if (aKeyboardEvent->mMessage == eKeyUp) {
return result;
}
// Modifier keys are not allowed because managing modifier state in this
// method makes this messy.
if (NS_WARN_IF(aKeyboardEvent->IsModifierKeyEvent())) {
result.mResult = NS_ERROR_INVALID_ARG;
result.mCanContinue = false;
return result;
}
uint32_t consumedFlags = 0;
result.mResult = KeydownInternal(*aKeyboardEvent, aKeyFlags, false,
consumedFlags);
result.mDoDefault = !consumedFlags;
if (NS_WARN_IF(NS_FAILED(result.mResult))) {
result.mCanContinue = false;
return result;
}
result.mCanContinue = NS_SUCCEEDED(IsValidStateForComposition());
return result;
}
TextInputProcessor::EventDispatcherResult
TextInputProcessor::MaybeDispatchKeyupForComposition(
const WidgetKeyboardEvent* aKeyboardEvent,
uint32_t aKeyFlags)
{
EventDispatcherResult result;
if (!aKeyboardEvent) {
return result;
}
// If the mMessage is eKeyDown, the caller doesn't want TIP to dispatch
// eKeyUp event.
if (aKeyboardEvent->mMessage == eKeyDown) {
return result;
}
// If the widget has been destroyed, we can do nothing here.
result.mResult = IsValidStateForComposition();
if (NS_FAILED(result.mResult)) {
result.mCanContinue = false;
return result;
}
result.mResult = KeyupInternal(*aKeyboardEvent, aKeyFlags, result.mDoDefault);
if (NS_WARN_IF(NS_FAILED(result.mResult))) {
result.mCanContinue = false;
return result;
}
result.mCanContinue = NS_SUCCEEDED(IsValidStateForComposition());
return result;
}
nsresult
TextInputProcessor::PrepareKeyboardEventForComposition(
KeyboardEvent* aDOMKeyEvent,
uint32_t& aKeyFlags,
uint8_t aOptionalArgc,
WidgetKeyboardEvent*& aKeyboardEvent)
{
aKeyboardEvent = nullptr;
aKeyboardEvent =
aOptionalArgc && aDOMKeyEvent ?
aDOMKeyEvent->WidgetEventPtr()->AsKeyboardEvent() : nullptr;
if (!aKeyboardEvent || aOptionalArgc < 2) {
aKeyFlags = 0;
}
if (!aKeyboardEvent) {
return NS_OK;
}
if (NS_WARN_IF(!IsValidEventTypeForComposition(*aKeyboardEvent))) {
return NS_ERROR_INVALID_ARG;
}
return NS_OK;
}
NS_IMETHODIMP
TextInputProcessor::StartComposition(nsIDOMEvent* aDOMKeyEvent,
uint32_t aKeyFlags,
uint8_t aOptionalArgc,
bool* aSucceeded)
{
MOZ_RELEASE_ASSERT(aSucceeded, "aSucceeded must not be nullptr");
MOZ_RELEASE_ASSERT(nsContentUtils::IsCallerChrome());
*aSucceeded = false;
RefPtr<KeyboardEvent> keyEvent;
if (aDOMKeyEvent) {
keyEvent = aDOMKeyEvent->InternalDOMEvent()->AsKeyboardEvent();
if (NS_WARN_IF(!keyEvent)) {
return NS_ERROR_INVALID_ARG;
}
}
RefPtr<TextEventDispatcher> kungFuDeathGrip(mDispatcher);
WidgetKeyboardEvent* keyboardEvent;
nsresult rv =
PrepareKeyboardEventForComposition(keyEvent, aKeyFlags, aOptionalArgc,
keyboardEvent);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
EventDispatcherResult dispatcherResult =
MaybeDispatchKeydownForComposition(keyboardEvent, aKeyFlags);
if (NS_WARN_IF(NS_FAILED(dispatcherResult.mResult)) ||
!dispatcherResult.mCanContinue) {
return dispatcherResult.mResult;
}
if (dispatcherResult.mDoDefault) {
nsEventStatus status = nsEventStatus_eIgnore;
rv = kungFuDeathGrip->StartComposition(status);
*aSucceeded = status != nsEventStatus_eConsumeNoDefault &&
kungFuDeathGrip && kungFuDeathGrip->IsComposing();
}
MaybeDispatchKeyupForComposition(keyboardEvent, aKeyFlags);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
NS_IMETHODIMP
TextInputProcessor::SetPendingCompositionString(const nsAString& aString)
{
MOZ_RELEASE_ASSERT(nsContentUtils::IsCallerChrome());
RefPtr<TextEventDispatcher> kungFuDeathGrip(mDispatcher);
nsresult rv = IsValidStateForComposition();
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return kungFuDeathGrip->SetPendingCompositionString(aString);
}
NS_IMETHODIMP
TextInputProcessor::AppendClauseToPendingComposition(uint32_t aLength,
uint32_t aAttribute)
{
MOZ_RELEASE_ASSERT(nsContentUtils::IsCallerChrome());
RefPtr<TextEventDispatcher> kungFuDeathGrip(mDispatcher);
TextRangeType textRangeType;
switch (aAttribute) {
case ATTR_RAW_CLAUSE:
case ATTR_SELECTED_RAW_CLAUSE:
case ATTR_CONVERTED_CLAUSE:
case ATTR_SELECTED_CLAUSE:
textRangeType = ToTextRangeType(aAttribute);
break;
default:
return NS_ERROR_INVALID_ARG;
}
nsresult rv = IsValidStateForComposition();
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return kungFuDeathGrip->AppendClauseToPendingComposition(aLength, textRangeType);
}
NS_IMETHODIMP
TextInputProcessor::SetCaretInPendingComposition(uint32_t aOffset)
{
MOZ_RELEASE_ASSERT(nsContentUtils::IsCallerChrome());
RefPtr<TextEventDispatcher> kungFuDeathGrip(mDispatcher);
nsresult rv = IsValidStateForComposition();
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return kungFuDeathGrip->SetCaretInPendingComposition(aOffset, 0);
}
NS_IMETHODIMP
TextInputProcessor::FlushPendingComposition(nsIDOMEvent* aDOMKeyEvent,
uint32_t aKeyFlags,
uint8_t aOptionalArgc,
bool* aSucceeded)
{
MOZ_RELEASE_ASSERT(aSucceeded, "aSucceeded must not be nullptr");
MOZ_RELEASE_ASSERT(nsContentUtils::IsCallerChrome());
// Even if this doesn't flush pending composition actually, we need to reset
// pending composition for starting next composition with new user input.
AutoPendingCompositionResetter resetter(this);
*aSucceeded = false;
RefPtr<TextEventDispatcher> kungFuDeathGrip(mDispatcher);
bool wasComposing = IsComposing();
RefPtr<KeyboardEvent> keyEvent;
if (aDOMKeyEvent) {
keyEvent = aDOMKeyEvent->InternalDOMEvent()->AsKeyboardEvent();
if (NS_WARN_IF(!keyEvent)) {
return NS_ERROR_INVALID_ARG;
}
}
WidgetKeyboardEvent* keyboardEvent;
nsresult rv =
PrepareKeyboardEventForComposition(keyEvent, aKeyFlags, aOptionalArgc,
keyboardEvent);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
EventDispatcherResult dispatcherResult =
MaybeDispatchKeydownForComposition(keyboardEvent, aKeyFlags);
if (NS_WARN_IF(NS_FAILED(dispatcherResult.mResult)) ||
!dispatcherResult.mCanContinue) {
return dispatcherResult.mResult;
}
// Even if the preceding keydown event was consumed, if the composition
// was already started, we shouldn't prevent the change of composition.
if (dispatcherResult.mDoDefault || wasComposing) {
// Preceding keydown event may cause destroying the widget.
if (NS_FAILED(IsValidStateForComposition())) {
return NS_OK;
}
nsEventStatus status = nsEventStatus_eIgnore;
rv = kungFuDeathGrip->FlushPendingComposition(status);
*aSucceeded = status != nsEventStatus_eConsumeNoDefault;
}
MaybeDispatchKeyupForComposition(keyboardEvent, aKeyFlags);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
NS_IMETHODIMP
TextInputProcessor::CommitComposition(nsIDOMEvent* aDOMKeyEvent,
uint32_t aKeyFlags,
uint8_t aOptionalArgc)
{
MOZ_RELEASE_ASSERT(nsContentUtils::IsCallerChrome());
RefPtr<KeyboardEvent> keyEvent;
if (aDOMKeyEvent) {
keyEvent = aDOMKeyEvent->InternalDOMEvent()->AsKeyboardEvent();
if (NS_WARN_IF(!keyEvent)) {
return NS_ERROR_INVALID_ARG;
}
}
WidgetKeyboardEvent* keyboardEvent;
nsresult rv =
PrepareKeyboardEventForComposition(keyEvent, aKeyFlags, aOptionalArgc,
keyboardEvent);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return CommitCompositionInternal(keyboardEvent, aKeyFlags);
}
NS_IMETHODIMP
TextInputProcessor::CommitCompositionWith(const nsAString& aCommitString,
nsIDOMEvent* aDOMKeyEvent,
uint32_t aKeyFlags,
uint8_t aOptionalArgc,
bool* aSucceeded)
{
MOZ_RELEASE_ASSERT(aSucceeded, "aSucceeded must not be nullptr");
MOZ_RELEASE_ASSERT(nsContentUtils::IsCallerChrome());
RefPtr<KeyboardEvent> keyEvent;
if (aDOMKeyEvent) {
keyEvent = aDOMKeyEvent->InternalDOMEvent()->AsKeyboardEvent();
if (NS_WARN_IF(!keyEvent)) {
return NS_ERROR_INVALID_ARG;
}
}
WidgetKeyboardEvent* keyboardEvent;
nsresult rv =
PrepareKeyboardEventForComposition(keyEvent, aKeyFlags, aOptionalArgc,
keyboardEvent);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return CommitCompositionInternal(keyboardEvent, aKeyFlags,
&aCommitString, aSucceeded);
}
nsresult
TextInputProcessor::CommitCompositionInternal(
const WidgetKeyboardEvent* aKeyboardEvent,
uint32_t aKeyFlags,
const nsAString* aCommitString,
bool* aSucceeded)
{
if (aSucceeded) {
*aSucceeded = false;
}
RefPtr<TextEventDispatcher> kungFuDeathGrip(mDispatcher);
bool wasComposing = IsComposing();
EventDispatcherResult dispatcherResult =
MaybeDispatchKeydownForComposition(aKeyboardEvent, aKeyFlags);
if (NS_WARN_IF(NS_FAILED(dispatcherResult.mResult)) ||
!dispatcherResult.mCanContinue) {
return dispatcherResult.mResult;
}
// Even if the preceding keydown event was consumed, if the composition
// was already started, we shouldn't prevent the commit of composition.
nsresult rv = NS_OK;
if (dispatcherResult.mDoDefault || wasComposing) {
// Preceding keydown event may cause destroying the widget.
if (NS_FAILED(IsValidStateForComposition())) {
return NS_OK;
}
nsEventStatus status = nsEventStatus_eIgnore;
rv = kungFuDeathGrip->CommitComposition(status, aCommitString);
if (aSucceeded) {
*aSucceeded = status != nsEventStatus_eConsumeNoDefault;
}
}
MaybeDispatchKeyupForComposition(aKeyboardEvent, aKeyFlags);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
NS_IMETHODIMP
TextInputProcessor::CancelComposition(nsIDOMEvent* aDOMKeyEvent,
uint32_t aKeyFlags,
uint8_t aOptionalArgc)
{
MOZ_RELEASE_ASSERT(nsContentUtils::IsCallerChrome());
RefPtr<KeyboardEvent> keyEvent;
if (aDOMKeyEvent) {
keyEvent = aDOMKeyEvent->InternalDOMEvent()->AsKeyboardEvent();
if (NS_WARN_IF(!keyEvent)) {
return NS_ERROR_INVALID_ARG;
}
}
WidgetKeyboardEvent* keyboardEvent;
nsresult rv =
PrepareKeyboardEventForComposition(keyEvent, aKeyFlags, aOptionalArgc,
keyboardEvent);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return CancelCompositionInternal(keyboardEvent, aKeyFlags);
}
nsresult
TextInputProcessor::CancelCompositionInternal(
const WidgetKeyboardEvent* aKeyboardEvent,
uint32_t aKeyFlags)
{
RefPtr<TextEventDispatcher> kungFuDeathGrip(mDispatcher);
EventDispatcherResult dispatcherResult =
MaybeDispatchKeydownForComposition(aKeyboardEvent, aKeyFlags);
if (NS_WARN_IF(NS_FAILED(dispatcherResult.mResult)) ||
!dispatcherResult.mCanContinue) {
return dispatcherResult.mResult;
}
nsEventStatus status = nsEventStatus_eIgnore;
nsresult rv = kungFuDeathGrip->CommitComposition(status, &EmptyString());
MaybeDispatchKeyupForComposition(aKeyboardEvent, aKeyFlags);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
NS_IMETHODIMP
TextInputProcessor::NotifyIME(TextEventDispatcher* aTextEventDispatcher,
const IMENotification& aNotification)
{
// If This is called while this is being initialized, ignore the call.
// In such case, this method should return NS_ERROR_NOT_IMPLEMENTED because
// we can say, TextInputProcessor doesn't implement any handlers of the
// requests and notifications.
if (!mDispatcher) {
return NS_ERROR_NOT_IMPLEMENTED;
}
MOZ_ASSERT(aTextEventDispatcher == mDispatcher,
"Wrong TextEventDispatcher notifies this");
NS_ASSERTION(mForTests || mCallback,
"mCallback can be null only when IME is initialized for tests");
if (mCallback) {
RefPtr<TextInputProcessorNotification> notification;
switch (aNotification.mMessage) {
case REQUEST_TO_COMMIT_COMPOSITION: {
NS_ASSERTION(aTextEventDispatcher->IsComposing(),
"Why is this requested without composition?");
notification = new TextInputProcessorNotification("request-to-commit");
break;
}
case REQUEST_TO_CANCEL_COMPOSITION: {
NS_ASSERTION(aTextEventDispatcher->IsComposing(),
"Why is this requested without composition?");
notification = new TextInputProcessorNotification("request-to-cancel");
break;
}
case NOTIFY_IME_OF_FOCUS:
notification = new TextInputProcessorNotification("notify-focus");
break;
case NOTIFY_IME_OF_BLUR:
notification = new TextInputProcessorNotification("notify-blur");
break;
case NOTIFY_IME_OF_TEXT_CHANGE:
notification = new TextInputProcessorNotification(
aNotification.mTextChangeData);
break;
case NOTIFY_IME_OF_SELECTION_CHANGE:
notification = new TextInputProcessorNotification(
aNotification.mSelectionChangeData);
break;
case NOTIFY_IME_OF_POSITION_CHANGE:
notification = new TextInputProcessorNotification(
"notify-position-change");
break;
default:
return NS_ERROR_NOT_IMPLEMENTED;
}
MOZ_RELEASE_ASSERT(notification);
bool result = false;
nsresult rv = mCallback->OnNotify(this, notification, &result);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return result ? NS_OK : NS_ERROR_FAILURE;
}
switch (aNotification.mMessage) {
case REQUEST_TO_COMMIT_COMPOSITION: {
NS_ASSERTION(aTextEventDispatcher->IsComposing(),
"Why is this requested without composition?");
CommitCompositionInternal();
return NS_OK;
}
case REQUEST_TO_CANCEL_COMPOSITION: {
NS_ASSERTION(aTextEventDispatcher->IsComposing(),
"Why is this requested without composition?");
CancelCompositionInternal();
return NS_OK;
}
default:
return NS_ERROR_NOT_IMPLEMENTED;
}
}
NS_IMETHODIMP_(IMENotificationRequests)
TextInputProcessor::GetIMENotificationRequests()
{
// TextInputProcessor should support all change notifications.
return IMENotificationRequests(
IMENotificationRequests::NOTIFY_TEXT_CHANGE |
IMENotificationRequests::NOTIFY_POSITION_CHANGE);
}
NS_IMETHODIMP_(void)
TextInputProcessor::OnRemovedFrom(TextEventDispatcher* aTextEventDispatcher)
{
// If This is called while this is being initialized, ignore the call.
if (!mDispatcher) {
return;
}
MOZ_ASSERT(aTextEventDispatcher == mDispatcher,
"Wrong TextEventDispatcher notifies this");
UnlinkFromTextEventDispatcher();
}
NS_IMETHODIMP_(void)
TextInputProcessor::WillDispatchKeyboardEvent(
TextEventDispatcher* aTextEventDispatcher,
WidgetKeyboardEvent& aKeyboardEvent,
uint32_t aIndexOfKeypress,
void* aData)
{
// TextInputProcessor doesn't set alternative char code nor modify charCode
// even when Ctrl key is pressed.
}
nsresult
TextInputProcessor::PrepareKeyboardEventToDispatch(
WidgetKeyboardEvent& aKeyboardEvent,
uint32_t aKeyFlags)
{
if (NS_WARN_IF(aKeyboardEvent.mCodeNameIndex == CODE_NAME_INDEX_USE_STRING)) {
return NS_ERROR_INVALID_ARG;
}
if ((aKeyFlags & KEY_NON_PRINTABLE_KEY) &&
NS_WARN_IF(aKeyboardEvent.mKeyNameIndex == KEY_NAME_INDEX_USE_STRING)) {
return NS_ERROR_INVALID_ARG;
}
if ((aKeyFlags & KEY_FORCE_PRINTABLE_KEY) &&
aKeyboardEvent.mKeyNameIndex != KEY_NAME_INDEX_USE_STRING) {
aKeyboardEvent.GetDOMKeyName(aKeyboardEvent.mKeyValue);
aKeyboardEvent.mKeyNameIndex = KEY_NAME_INDEX_USE_STRING;
}
if (aKeyFlags & KEY_KEEP_KEY_LOCATION_STANDARD) {
// If .location is initialized with specific value, using
// KEY_KEEP_KEY_LOCATION_STANDARD must be a bug of the caller.
// Let's throw an exception for notifying the developer of this bug.
if (NS_WARN_IF(aKeyboardEvent.mLocation)) {
return NS_ERROR_INVALID_ARG;
}
} else if (!aKeyboardEvent.mLocation) {
// If KeyboardEvent.mLocation is 0, it may be uninitialized. If so, we
// should compute proper mLocation value from its .code value.
aKeyboardEvent.mLocation =
WidgetKeyboardEvent::ComputeLocationFromCodeValue(
aKeyboardEvent.mCodeNameIndex);
}
if (aKeyFlags & KEY_KEEP_KEYCODE_ZERO) {
// If .keyCode is initialized with specific value, using
// KEY_KEEP_KEYCODE_ZERO must be a bug of the caller. Let's throw an
// exception for notifying the developer of such bug.
if (NS_WARN_IF(aKeyboardEvent.mKeyCode)) {
return NS_ERROR_INVALID_ARG;
}
} else if (!aKeyboardEvent.mKeyCode &&
aKeyboardEvent.mKeyNameIndex > KEY_NAME_INDEX_Unidentified &&
aKeyboardEvent.mKeyNameIndex < KEY_NAME_INDEX_USE_STRING) {
// If KeyboardEvent.keyCode is 0, it may be uninitialized. If so, we may
// be able to decide a good .keyCode value if the .key value is a
// non-printable key.
aKeyboardEvent.mKeyCode =
WidgetKeyboardEvent::ComputeKeyCodeFromKeyNameIndex(
aKeyboardEvent.mKeyNameIndex);
}
aKeyboardEvent.mIsSynthesizedByTIP = (mForTests)? false : true;
return NS_OK;
}
NS_IMETHODIMP
TextInputProcessor::Keydown(nsIDOMEvent* aDOMKeyEvent,
uint32_t aKeyFlags,
uint8_t aOptionalArgc,
uint32_t* aConsumedFlags)
{
MOZ_RELEASE_ASSERT(aConsumedFlags, "aConsumedFlags must not be nullptr");
MOZ_RELEASE_ASSERT(nsContentUtils::IsCallerChrome());
if (!aOptionalArgc) {
aKeyFlags = 0;
}
if (NS_WARN_IF(!aDOMKeyEvent)) {
return NS_ERROR_INVALID_ARG;
}
WidgetKeyboardEvent* originalKeyEvent =
aDOMKeyEvent->InternalDOMEvent()->WidgetEventPtr()->AsKeyboardEvent();
if (NS_WARN_IF(!originalKeyEvent)) {
return NS_ERROR_INVALID_ARG;
}
return KeydownInternal(*originalKeyEvent, aKeyFlags, true, *aConsumedFlags);
}
nsresult
TextInputProcessor::KeydownInternal(const WidgetKeyboardEvent& aKeyboardEvent,
uint32_t aKeyFlags,
bool aAllowToDispatchKeypress,
uint32_t& aConsumedFlags)
{
aConsumedFlags = KEYEVENT_NOT_CONSUMED;
// We shouldn't modify the internal WidgetKeyboardEvent.
WidgetKeyboardEvent keyEvent(aKeyboardEvent);
nsresult rv = PrepareKeyboardEventToDispatch(keyEvent, aKeyFlags);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
aConsumedFlags = (aKeyFlags & KEY_DEFAULT_PREVENTED) ? KEYDOWN_IS_CONSUMED :
KEYEVENT_NOT_CONSUMED;
if (WidgetKeyboardEvent::GetModifierForKeyName(keyEvent.mKeyNameIndex)) {
ModifierKeyData modifierKeyData(keyEvent);
if (WidgetKeyboardEvent::IsLockableModifier(keyEvent.mKeyNameIndex)) {
// If the modifier key is lockable modifier key such as CapsLock,
// let's toggle modifier key state at keydown.
ToggleModifierKey(modifierKeyData);
} else {
// Activate modifier flag before dispatching keydown event (i.e., keydown
// event should indicate the releasing modifier is active.
ActivateModifierKey(modifierKeyData);
}
if (aKeyFlags & KEY_DONT_DISPATCH_MODIFIER_KEY_EVENT) {
return NS_OK;
}
} else if (NS_WARN_IF(aKeyFlags & KEY_DONT_DISPATCH_MODIFIER_KEY_EVENT)) {
return NS_ERROR_INVALID_ARG;
}
keyEvent.mModifiers = GetActiveModifiers();
if (!aAllowToDispatchKeypress &&
!(aKeyFlags & KEY_DONT_MARK_KEYDOWN_AS_PROCESSED)) {
keyEvent.mKeyCode = NS_VK_PROCESSKEY;
keyEvent.mKeyNameIndex = KEY_NAME_INDEX_Process;
}
RefPtr<TextEventDispatcher> kungFuDeathGrip(mDispatcher);
rv = IsValidStateForComposition();
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
nsEventStatus status = aConsumedFlags ? nsEventStatus_eConsumeNoDefault :
nsEventStatus_eIgnore;
if (!kungFuDeathGrip->DispatchKeyboardEvent(eKeyDown, keyEvent, status)) {
// If keydown event isn't dispatched, we don't need to dispatch keypress
// events.
return NS_OK;
}
aConsumedFlags |=
(status == nsEventStatus_eConsumeNoDefault) ? KEYDOWN_IS_CONSUMED :
KEYEVENT_NOT_CONSUMED;
if (aAllowToDispatchKeypress &&
kungFuDeathGrip->MaybeDispatchKeypressEvents(keyEvent, status)) {
aConsumedFlags |=
(status == nsEventStatus_eConsumeNoDefault) ? KEYPRESS_IS_CONSUMED :
KEYEVENT_NOT_CONSUMED;
}
return NS_OK;
}
NS_IMETHODIMP
TextInputProcessor::Keyup(nsIDOMEvent* aDOMKeyEvent,
uint32_t aKeyFlags,
uint8_t aOptionalArgc,
bool* aDoDefault)
{
MOZ_RELEASE_ASSERT(aDoDefault, "aDoDefault must not be nullptr");
MOZ_RELEASE_ASSERT(nsContentUtils::IsCallerChrome());
if (!aOptionalArgc) {
aKeyFlags = 0;
}
if (NS_WARN_IF(!aDOMKeyEvent)) {
return NS_ERROR_INVALID_ARG;
}
WidgetKeyboardEvent* originalKeyEvent =
aDOMKeyEvent->InternalDOMEvent()->WidgetEventPtr()->AsKeyboardEvent();
if (NS_WARN_IF(!originalKeyEvent)) {
return NS_ERROR_INVALID_ARG;
}
return KeyupInternal(*originalKeyEvent, aKeyFlags, *aDoDefault);
}
nsresult
TextInputProcessor::KeyupInternal(const WidgetKeyboardEvent& aKeyboardEvent,
uint32_t aKeyFlags,
bool& aDoDefault)
{
aDoDefault = false;
// We shouldn't modify the internal WidgetKeyboardEvent.
WidgetKeyboardEvent keyEvent(aKeyboardEvent);
nsresult rv = PrepareKeyboardEventToDispatch(keyEvent, aKeyFlags);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
aDoDefault = !(aKeyFlags & KEY_DEFAULT_PREVENTED);
if (WidgetKeyboardEvent::GetModifierForKeyName(keyEvent.mKeyNameIndex)) {
if (!WidgetKeyboardEvent::IsLockableModifier(keyEvent.mKeyNameIndex)) {
// Inactivate modifier flag before dispatching keyup event (i.e., keyup
// event shouldn't indicate the releasing modifier is active.
InactivateModifierKey(ModifierKeyData(keyEvent));
}
if (aKeyFlags & KEY_DONT_DISPATCH_MODIFIER_KEY_EVENT) {
return NS_OK;
}
} else if (NS_WARN_IF(aKeyFlags & KEY_DONT_DISPATCH_MODIFIER_KEY_EVENT)) {
return NS_ERROR_INVALID_ARG;
}
keyEvent.mModifiers = GetActiveModifiers();
if (aKeyFlags & KEY_MARK_KEYUP_AS_PROCESSED) {
keyEvent.mKeyCode = NS_VK_PROCESSKEY;
keyEvent.mKeyNameIndex = KEY_NAME_INDEX_Process;
}
RefPtr<TextEventDispatcher> kungFuDeathGrip(mDispatcher);
rv = IsValidStateForComposition();
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
nsEventStatus status = aDoDefault ? nsEventStatus_eIgnore :
nsEventStatus_eConsumeNoDefault;
kungFuDeathGrip->DispatchKeyboardEvent(eKeyUp, keyEvent, status);
aDoDefault = (status != nsEventStatus_eConsumeNoDefault);
return NS_OK;
}
NS_IMETHODIMP
TextInputProcessor::GetModifierState(const nsAString& aModifierKeyName,
bool* aActive)
{
MOZ_RELEASE_ASSERT(aActive, "aActive must not be null");
MOZ_RELEASE_ASSERT(nsContentUtils::IsCallerChrome());
if (!mModifierKeyDataArray) {
*aActive = false;
return NS_OK;
}
Modifiers activeModifiers = mModifierKeyDataArray->GetActiveModifiers();
Modifiers modifier = WidgetInputEvent::GetModifier(aModifierKeyName);
*aActive = ((activeModifiers & modifier) != 0);
return NS_OK;
}
NS_IMETHODIMP
TextInputProcessor::ShareModifierStateOf(nsITextInputProcessor* aOther)
{
MOZ_RELEASE_ASSERT(nsContentUtils::IsCallerChrome());
if (!aOther) {
mModifierKeyDataArray = nullptr;
return NS_OK;
}
TextInputProcessor* other = static_cast<TextInputProcessor*>(aOther);
if (!other->mModifierKeyDataArray) {
other->mModifierKeyDataArray = new ModifierKeyDataArray();
}
mModifierKeyDataArray = other->mModifierKeyDataArray;
return NS_OK;
}
/******************************************************************************
* TextInputProcessor::AutoPendingCompositionResetter
******************************************************************************/
TextInputProcessor::AutoPendingCompositionResetter::
AutoPendingCompositionResetter(TextInputProcessor* aTIP)
: mTIP(aTIP)
{
MOZ_RELEASE_ASSERT(mTIP.get(), "mTIP must not be null");
}
TextInputProcessor::AutoPendingCompositionResetter::
~AutoPendingCompositionResetter()
{
if (mTIP->mDispatcher) {
mTIP->mDispatcher->ClearPendingComposition();
}
}
/******************************************************************************
* TextInputProcessor::ModifierKeyData
******************************************************************************/
TextInputProcessor::ModifierKeyData::ModifierKeyData(
const WidgetKeyboardEvent& aKeyboardEvent)
: mKeyNameIndex(aKeyboardEvent.mKeyNameIndex)
, mCodeNameIndex(aKeyboardEvent.mCodeNameIndex)
{
mModifier = WidgetKeyboardEvent::GetModifierForKeyName(mKeyNameIndex);
MOZ_ASSERT(mModifier, "mKeyNameIndex must be a modifier key name");
}
/******************************************************************************
* TextInputProcessor::ModifierKeyDataArray
******************************************************************************/
Modifiers
TextInputProcessor::ModifierKeyDataArray::GetActiveModifiers() const
{
Modifiers result = MODIFIER_NONE;
for (uint32_t i = 0; i < Length(); i++) {
result |= ElementAt(i).mModifier;
}
return result;
}
void
TextInputProcessor::ModifierKeyDataArray::ActivateModifierKey(
const TextInputProcessor::ModifierKeyData& aModifierKeyData)
{
if (Contains(aModifierKeyData)) {
return;
}
AppendElement(aModifierKeyData);
}
void
TextInputProcessor::ModifierKeyDataArray::InactivateModifierKey(
const TextInputProcessor::ModifierKeyData& aModifierKeyData)
{
RemoveElement(aModifierKeyData);
}
void
TextInputProcessor::ModifierKeyDataArray::ToggleModifierKey(
const TextInputProcessor::ModifierKeyData& aModifierKeyData)
{
auto index = IndexOf(aModifierKeyData);
if (index == NoIndex) {
AppendElement(aModifierKeyData);
return;
}
RemoveElementAt(index);
}
} // namespace mozilla
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