gecko-dev/widget/gtk/IMContextWrapper.cpp

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83 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim: set ts=4 et sw=4 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 "prtime.h"
#include "IMContextWrapper.h"
#include "nsGtkKeyUtils.h"
#include "nsWindow.h"
#include "mozilla/AutoRestore.h"
#include "mozilla/Likely.h"
#include "mozilla/MiscEvents.h"
#include "mozilla/Preferences.h"
#include "mozilla/TextEventDispatcher.h"
#include "mozilla/TextEvents.h"
#include "WritingModes.h"
namespace mozilla {
namespace widget {
LazyLogModule gGtkIMLog("nsGtkIMModuleWidgets");
static inline const char*
ToChar(bool aBool)
{
return aBool ? "true" : "false";
}
static const char*
GetEnabledStateName(uint32_t aState)
{
switch (aState) {
case IMEState::DISABLED:
return "DISABLED";
case IMEState::ENABLED:
return "ENABLED";
case IMEState::PASSWORD:
return "PASSWORD";
case IMEState::PLUGIN:
return "PLUG_IN";
default:
return "UNKNOWN ENABLED STATUS!!";
}
}
static const char*
GetEventType(GdkEventKey* aKeyEvent)
{
switch (aKeyEvent->type) {
case GDK_KEY_PRESS:
return "GDK_KEY_PRESS";
case GDK_KEY_RELEASE:
return "GDK_KEY_RELEASE";
default:
return "Unknown";
}
}
class GetWritingModeName : public nsAutoCString
{
public:
explicit GetWritingModeName(const WritingMode& aWritingMode)
{
if (!aWritingMode.IsVertical()) {
AssignLiteral("Horizontal");
return;
}
if (aWritingMode.IsVerticalLR()) {
AssignLiteral("Vertical (LTR)");
return;
}
AssignLiteral("Vertical (RTL)");
}
virtual ~GetWritingModeName() {}
};
class GetTextRangeStyleText final : public nsAutoCString
{
public:
explicit GetTextRangeStyleText(const TextRangeStyle& aStyle)
{
if (!aStyle.IsDefined()) {
AssignLiteral("{ IsDefined()=false }");
return;
}
if (aStyle.IsLineStyleDefined()) {
AppendLiteral("{ mLineStyle=");
AppendLineStyle(aStyle.mLineStyle);
if (aStyle.IsUnderlineColorDefined()) {
AppendLiteral(", mUnderlineColor=");
AppendColor(aStyle.mUnderlineColor);
} else {
AppendLiteral(", IsUnderlineColorDefined=false");
}
} else {
AppendLiteral("{ IsLineStyleDefined()=false");
}
if (aStyle.IsForegroundColorDefined()) {
AppendLiteral(", mForegroundColor=");
AppendColor(aStyle.mForegroundColor);
} else {
AppendLiteral(", IsForegroundColorDefined()=false");
}
if (aStyle.IsBackgroundColorDefined()) {
AppendLiteral(", mBackgroundColor=");
AppendColor(aStyle.mBackgroundColor);
} else {
AppendLiteral(", IsBackgroundColorDefined()=false");
}
AppendLiteral(" }");
}
void AppendLineStyle(uint8_t aLineStyle)
{
switch (aLineStyle) {
case TextRangeStyle::LINESTYLE_NONE:
AppendLiteral("LINESTYLE_NONE");
break;
case TextRangeStyle::LINESTYLE_SOLID:
AppendLiteral("LINESTYLE_SOLID");
break;
case TextRangeStyle::LINESTYLE_DOTTED:
AppendLiteral("LINESTYLE_DOTTED");
break;
case TextRangeStyle::LINESTYLE_DASHED:
AppendLiteral("LINESTYLE_DASHED");
break;
case TextRangeStyle::LINESTYLE_DOUBLE:
AppendLiteral("LINESTYLE_DOUBLE");
break;
case TextRangeStyle::LINESTYLE_WAVY:
AppendLiteral("LINESTYLE_WAVY");
break;
default:
AppendPrintf("Invalid(0x%02X)", aLineStyle);
break;
}
}
void AppendColor(nscolor aColor)
{
AppendPrintf("{ R=0x%02X, G=0x%02X, B=0x%02X, A=0x%02X }",
NS_GET_R(aColor), NS_GET_G(aColor), NS_GET_B(aColor),
NS_GET_A(aColor));
}
virtual ~GetTextRangeStyleText() {};
};
const static bool kUseSimpleContextDefault = MOZ_WIDGET_GTK == 2;
/******************************************************************************
* IMContextWrapper
******************************************************************************/
IMContextWrapper* IMContextWrapper::sLastFocusedContext = nullptr;
bool IMContextWrapper::sUseSimpleContext;
NS_IMPL_ISUPPORTS(IMContextWrapper,
TextEventDispatcherListener,
nsISupportsWeakReference)
IMContextWrapper::IMContextWrapper(nsWindow* aOwnerWindow)
: mOwnerWindow(aOwnerWindow)
, mLastFocusedWindow(nullptr)
, mContext(nullptr)
, mSimpleContext(nullptr)
, mDummyContext(nullptr)
, mComposingContext(nullptr)
, mCompositionStart(UINT32_MAX)
, mProcessingKeyEvent(nullptr)
, mCompositionState(eCompositionState_NotComposing)
, mIsIMFocused(false)
, mIsDeletingSurrounding(false)
, mLayoutChanged(false)
, mSetCursorPositionOnKeyEvent(true)
, mPendingResettingIMContext(false)
, mRetrieveSurroundingSignalReceived(false)
{
static bool sFirstInstance = true;
if (sFirstInstance) {
sFirstInstance = false;
sUseSimpleContext =
Preferences::GetBool(
"intl.ime.use_simple_context_on_password_field",
kUseSimpleContextDefault);
}
Init();
}
void
IMContextWrapper::Init()
{
MOZ_LOG(gGtkIMLog, LogLevel::Info,
("0x%p Init(), mOwnerWindow=0x%p",
this, mOwnerWindow));
MozContainer* container = mOwnerWindow->GetMozContainer();
NS_PRECONDITION(container, "container is null");
GdkWindow* gdkWindow = gtk_widget_get_window(GTK_WIDGET(container));
// NOTE: gtk_im_*_new() abort (kill) the whole process when it fails.
// So, we don't need to check the result.
// Normal context.
mContext = gtk_im_multicontext_new();
gtk_im_context_set_client_window(mContext, gdkWindow);
g_signal_connect(mContext, "preedit_changed",
G_CALLBACK(IMContextWrapper::OnChangeCompositionCallback), this);
g_signal_connect(mContext, "retrieve_surrounding",
G_CALLBACK(IMContextWrapper::OnRetrieveSurroundingCallback), this);
g_signal_connect(mContext, "delete_surrounding",
G_CALLBACK(IMContextWrapper::OnDeleteSurroundingCallback), this);
g_signal_connect(mContext, "commit",
G_CALLBACK(IMContextWrapper::OnCommitCompositionCallback), this);
g_signal_connect(mContext, "preedit_start",
G_CALLBACK(IMContextWrapper::OnStartCompositionCallback), this);
g_signal_connect(mContext, "preedit_end",
G_CALLBACK(IMContextWrapper::OnEndCompositionCallback), this);
// Simple context
if (sUseSimpleContext) {
mSimpleContext = gtk_im_context_simple_new();
gtk_im_context_set_client_window(mSimpleContext, gdkWindow);
g_signal_connect(mSimpleContext, "preedit_changed",
G_CALLBACK(&IMContextWrapper::OnChangeCompositionCallback),
this);
g_signal_connect(mSimpleContext, "retrieve_surrounding",
G_CALLBACK(&IMContextWrapper::OnRetrieveSurroundingCallback),
this);
g_signal_connect(mSimpleContext, "delete_surrounding",
G_CALLBACK(&IMContextWrapper::OnDeleteSurroundingCallback),
this);
g_signal_connect(mSimpleContext, "commit",
G_CALLBACK(&IMContextWrapper::OnCommitCompositionCallback),
this);
g_signal_connect(mSimpleContext, "preedit_start",
G_CALLBACK(IMContextWrapper::OnStartCompositionCallback),
this);
g_signal_connect(mSimpleContext, "preedit_end",
G_CALLBACK(IMContextWrapper::OnEndCompositionCallback),
this);
}
// Dummy context
mDummyContext = gtk_im_multicontext_new();
gtk_im_context_set_client_window(mDummyContext, gdkWindow);
}
IMContextWrapper::~IMContextWrapper()
{
if (this == sLastFocusedContext) {
sLastFocusedContext = nullptr;
}
MOZ_LOG(gGtkIMLog, LogLevel::Info,
("0x%p ~IMContextWrapper()", this));
}
NS_IMETHODIMP
IMContextWrapper::NotifyIME(TextEventDispatcher* aTextEventDispatcher,
const IMENotification& aNotification)
{
switch (aNotification.mMessage) {
case REQUEST_TO_COMMIT_COMPOSITION:
case REQUEST_TO_CANCEL_COMPOSITION: {
nsWindow* window =
static_cast<nsWindow*>(aTextEventDispatcher->GetWidget());
return EndIMEComposition(window);
}
case NOTIFY_IME_OF_FOCUS:
OnFocusChangeInGecko(true);
return NS_OK;
case NOTIFY_IME_OF_BLUR:
OnFocusChangeInGecko(false);
return NS_OK;
case NOTIFY_IME_OF_POSITION_CHANGE:
OnLayoutChange();
return NS_OK;
case NOTIFY_IME_OF_COMPOSITION_EVENT_HANDLED:
OnUpdateComposition();
return NS_OK;
case NOTIFY_IME_OF_SELECTION_CHANGE: {
nsWindow* window =
static_cast<nsWindow*>(aTextEventDispatcher->GetWidget());
OnSelectionChange(window, aNotification);
return NS_OK;
}
default:
return NS_ERROR_NOT_IMPLEMENTED;
}
}
NS_IMETHODIMP_(void)
IMContextWrapper::OnRemovedFrom(TextEventDispatcher* aTextEventDispatcher)
{
// XXX When input transaction is being stolen by add-on, what should we do?
}
NS_IMETHODIMP_(void)
IMContextWrapper::WillDispatchKeyboardEvent(
TextEventDispatcher* aTextEventDispatcher,
WidgetKeyboardEvent& aKeyboardEvent,
uint32_t aIndexOfKeypress,
void* aData)
{
KeymapWrapper::WillDispatchKeyboardEvent(aKeyboardEvent,
static_cast<GdkEventKey*>(aData));
}
TextEventDispatcher*
IMContextWrapper::GetTextEventDispatcher()
{
if (NS_WARN_IF(!mLastFocusedWindow)) {
return nullptr;
}
TextEventDispatcher* dispatcher =
mLastFocusedWindow->GetTextEventDispatcher();
// nsIWidget::GetTextEventDispatcher() shouldn't return nullptr.
MOZ_RELEASE_ASSERT(dispatcher);
return dispatcher;
}
nsIMEUpdatePreference
IMContextWrapper::GetIMEUpdatePreference() const
{
// While a plugin has focus, IMContextWrapper doesn't need any
// notifications.
if (mInputContext.mIMEState.mEnabled == IMEState::PLUGIN) {
return nsIMEUpdatePreference();
}
nsIMEUpdatePreference::Notifications notifications =
nsIMEUpdatePreference::NOTIFY_NOTHING;
// If it's not enabled, we don't need position change notification.
if (IsEnabled()) {
notifications |= nsIMEUpdatePreference::NOTIFY_POSITION_CHANGE;
}
nsIMEUpdatePreference updatePreference(notifications);
return updatePreference;
}
void
IMContextWrapper::OnDestroyWindow(nsWindow* aWindow)
{
MOZ_LOG(gGtkIMLog, LogLevel::Info,
("0x%p OnDestroyWindow(aWindow=0x%p), mLastFocusedWindow=0x%p, "
"mOwnerWindow=0x%p, mLastFocusedModule=0x%p",
this, aWindow, mLastFocusedWindow, mOwnerWindow, sLastFocusedContext));
NS_PRECONDITION(aWindow, "aWindow must not be null");
if (mLastFocusedWindow == aWindow) {
EndIMEComposition(aWindow);
if (mIsIMFocused) {
Blur();
}
mLastFocusedWindow = nullptr;
}
if (mOwnerWindow != aWindow) {
return;
}
if (sLastFocusedContext == this) {
sLastFocusedContext = nullptr;
}
/**
* NOTE:
* The given window is the owner of this, so, we must release the
* contexts now. But that might be referred from other nsWindows
* (they are children of this. But we don't know why there are the
* cases). So, we need to clear the pointers that refers to contexts
* and this if the other referrers are still alive. See bug 349727.
*/
if (mContext) {
PrepareToDestroyContext(mContext);
gtk_im_context_set_client_window(mContext, nullptr);
g_object_unref(mContext);
mContext = nullptr;
}
if (mSimpleContext) {
gtk_im_context_set_client_window(mSimpleContext, nullptr);
g_object_unref(mSimpleContext);
mSimpleContext = nullptr;
}
if (mDummyContext) {
// mContext and mDummyContext have the same slaveType and signal_data
// so no need for another workaround_gtk_im_display_closed.
gtk_im_context_set_client_window(mDummyContext, nullptr);
g_object_unref(mDummyContext);
mDummyContext = nullptr;
}
if (NS_WARN_IF(mComposingContext)) {
g_object_unref(mComposingContext);
mComposingContext = nullptr;
}
mOwnerWindow = nullptr;
mLastFocusedWindow = nullptr;
mInputContext.mIMEState.mEnabled = IMEState::DISABLED;
MOZ_LOG(gGtkIMLog, LogLevel::Debug,
("0x%p OnDestroyWindow(), succeeded, Completely destroyed",
this));
}
// Work around gtk bug http://bugzilla.gnome.org/show_bug.cgi?id=483223:
// (and the similar issue of GTK+ IIIM)
// The GTK+ XIM and IIIM modules register handlers for the "closed" signal
// on the display, but:
// * The signal handlers are not disconnected when the module is unloaded.
//
// The GTK+ XIM module has another problem:
// * When the signal handler is run (with the module loaded) it tries
// XFree (and fails) on a pointer that did not come from Xmalloc.
//
// To prevent these modules from being unloaded, use static variables to
// hold ref of GtkIMContext class.
// For GTK+ XIM module, to prevent the signal handler from being run,
// find the signal handlers and remove them.
//
// GtkIMContextXIMs share XOpenIM connections and display closed signal
// handlers (where possible).
void
IMContextWrapper::PrepareToDestroyContext(GtkIMContext* aContext)
{
#if (MOZ_WIDGET_GTK == 2)
GtkIMMulticontext *multicontext = GTK_IM_MULTICONTEXT(aContext);
GtkIMContext *slave = multicontext->slave;
#else
GtkIMContext *slave = nullptr; //TODO GTK3
#endif
if (!slave) {
return;
}
GType slaveType = G_TYPE_FROM_INSTANCE(slave);
const gchar *im_type_name = g_type_name(slaveType);
if (strcmp(im_type_name, "GtkIMContextIIIM") == 0) {
// Add a reference to prevent the IIIM module from being unloaded
static gpointer gtk_iiim_context_class =
g_type_class_ref(slaveType);
// Mute unused variable warning:
(void)gtk_iiim_context_class;
}
}
void
IMContextWrapper::OnFocusWindow(nsWindow* aWindow)
{
if (MOZ_UNLIKELY(IsDestroyed())) {
return;
}
MOZ_LOG(gGtkIMLog, LogLevel::Info,
("0x%p OnFocusWindow(aWindow=0x%p), mLastFocusedWindow=0x%p",
this, aWindow, mLastFocusedWindow));
mLastFocusedWindow = aWindow;
Focus();
}
void
IMContextWrapper::OnBlurWindow(nsWindow* aWindow)
{
if (MOZ_UNLIKELY(IsDestroyed())) {
return;
}
MOZ_LOG(gGtkIMLog, LogLevel::Info,
("0x%p OnBlurWindow(aWindow=0x%p), mLastFocusedWindow=0x%p, "
"mIsIMFocused=%s",
this, aWindow, mLastFocusedWindow, ToChar(mIsIMFocused)));
if (!mIsIMFocused || mLastFocusedWindow != aWindow) {
return;
}
Blur();
}
bool
IMContextWrapper::OnKeyEvent(nsWindow* aCaller,
GdkEventKey* aEvent,
bool aKeyDownEventWasSent /* = false */)
{
NS_PRECONDITION(aEvent, "aEvent must be non-null");
if (!mInputContext.mIMEState.MaybeEditable() ||
MOZ_UNLIKELY(IsDestroyed())) {
return false;
}
MOZ_LOG(gGtkIMLog, LogLevel::Info,
("0x%p OnKeyEvent(aCaller=0x%p, aKeyDownEventWasSent=%s), "
"mCompositionState=%s, current context=0x%p, active context=0x%p, "
"aEvent(0x%p): { type=%s, keyval=%s, unicode=0x%X }",
this, aCaller, ToChar(aKeyDownEventWasSent),
GetCompositionStateName(), GetCurrentContext(), GetActiveContext(),
aEvent, GetEventType(aEvent), gdk_keyval_name(aEvent->keyval),
gdk_keyval_to_unicode(aEvent->keyval)));
if (aCaller != mLastFocusedWindow) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p OnKeyEvent(), FAILED, the caller isn't focused "
"window, mLastFocusedWindow=0x%p",
this, mLastFocusedWindow));
return false;
}
// Even if old IM context has composition, key event should be sent to
// current context since the user expects so.
GtkIMContext* currentContext = GetCurrentContext();
if (MOZ_UNLIKELY(!currentContext)) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p OnKeyEvent(), FAILED, there are no context",
this));
return false;
}
if (mSetCursorPositionOnKeyEvent) {
SetCursorPosition(currentContext);
mSetCursorPositionOnKeyEvent = false;
}
mKeyDownEventWasSent = aKeyDownEventWasSent;
mFilterKeyEvent = true;
mProcessingKeyEvent = aEvent;
gboolean isFiltered =
gtk_im_context_filter_keypress(currentContext, aEvent);
mProcessingKeyEvent = nullptr;
// We filter the key event if the event was not committed (because
// it's probably part of a composition) or if the key event was
// committed _and_ changed. This way we still let key press
// events go through as simple key press events instead of
// composed characters.
bool filterThisEvent = isFiltered && mFilterKeyEvent;
if (IsComposingOnCurrentContext() && !isFiltered) {
if (aEvent->type == GDK_KEY_PRESS) {
if (!mDispatchedCompositionString.IsEmpty()) {
// If there is composition string, we shouldn't dispatch
// any keydown events during composition.
filterThisEvent = true;
} else {
// A Hangul input engine for SCIM doesn't emit preedit_end
// signal even when composition string becomes empty. On the
// other hand, we should allow to make composition with empty
// string for other languages because there *might* be such
// IM. For compromising this issue, we should dispatch
// compositionend event, however, we don't need to reset IM
// actually.
DispatchCompositionCommitEvent(currentContext, &EmptyString());
filterThisEvent = false;
}
} else {
// Key release event may not be consumed by IM, however, we
// shouldn't dispatch any keyup event during composition.
filterThisEvent = true;
}
}
MOZ_LOG(gGtkIMLog, LogLevel::Debug,
("0x%p OnKeyEvent(), succeeded, filterThisEvent=%s "
"(isFiltered=%s, mFilterKeyEvent=%s), mCompositionState=%s",
this, ToChar(filterThisEvent), ToChar(isFiltered),
ToChar(mFilterKeyEvent), GetCompositionStateName()));
return filterThisEvent;
}
void
IMContextWrapper::OnFocusChangeInGecko(bool aFocus)
{
MOZ_LOG(gGtkIMLog, LogLevel::Info,
("0x%p OnFocusChangeInGecko(aFocus=%s), "
"mCompositionState=%s, mIsIMFocused=%s",
this, ToChar(aFocus), GetCompositionStateName(),
ToChar(mIsIMFocused)));
// We shouldn't carry over the removed string to another editor.
mSelectedString.Truncate();
mSelection.Clear();
}
void
IMContextWrapper::ResetIME()
{
MOZ_LOG(gGtkIMLog, LogLevel::Info,
("0x%p ResetIME(), mCompositionState=%s, mIsIMFocused=%s",
this, GetCompositionStateName(), ToChar(mIsIMFocused)));
GtkIMContext* activeContext = GetActiveContext();
if (MOZ_UNLIKELY(!activeContext)) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p ResetIME(), FAILED, there are no context",
this));
return;
}
RefPtr<IMContextWrapper> kungFuDeathGrip(this);
RefPtr<nsWindow> lastFocusedWindow(mLastFocusedWindow);
mPendingResettingIMContext = false;
gtk_im_context_reset(activeContext);
// The last focused window might have been destroyed by a DOM event handler
// which was called by us during a call of gtk_im_context_reset().
if (!lastFocusedWindow ||
NS_WARN_IF(lastFocusedWindow != mLastFocusedWindow) ||
lastFocusedWindow->Destroyed()) {
return;
}
nsAutoString compositionString;
GetCompositionString(activeContext, compositionString);
MOZ_LOG(gGtkIMLog, LogLevel::Debug,
("0x%p ResetIME() called gtk_im_context_reset(), "
"activeContext=0x%p, mCompositionState=%s, compositionString=%s, "
"mIsIMFocused=%s",
this, activeContext, GetCompositionStateName(),
NS_ConvertUTF16toUTF8(compositionString).get(),
ToChar(mIsIMFocused)));
// XXX IIIMF (ATOK X3 which is one of the Language Engine of it is still
// used in Japan!) sends only "preedit_changed" signal with empty
// composition string synchronously. Therefore, if composition string
// is now empty string, we should assume that the IME won't send
// "commit" signal.
if (IsComposing() && compositionString.IsEmpty()) {
// WARNING: The widget might have been gone after this.
DispatchCompositionCommitEvent(activeContext, &EmptyString());
}
}
nsresult
IMContextWrapper::EndIMEComposition(nsWindow* aCaller)
{
if (MOZ_UNLIKELY(IsDestroyed())) {
return NS_OK;
}
MOZ_LOG(gGtkIMLog, LogLevel::Info,
("0x%p EndIMEComposition(aCaller=0x%p), "
"mCompositionState=%s",
this, aCaller, GetCompositionStateName()));
if (aCaller != mLastFocusedWindow) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p EndIMEComposition(), FAILED, the caller isn't "
"focused window, mLastFocusedWindow=0x%p",
this, mLastFocusedWindow));
return NS_OK;
}
if (!IsComposing()) {
return NS_OK;
}
// Currently, GTK has API neither to commit nor to cancel composition
// forcibly. Therefore, TextComposition will recompute commit string for
// the request even if native IME will cause unexpected commit string.
// So, we don't need to emulate commit or cancel composition with
// proper composition events.
// XXX ResetIME() might not enough for finishing compositoin on some
// environments. We should emulate focus change too because some IMEs
// may commit or cancel composition at blur.
ResetIME();
return NS_OK;
}
void
IMContextWrapper::OnLayoutChange()
{
if (MOZ_UNLIKELY(IsDestroyed())) {
return;
}
if (IsComposing()) {
SetCursorPosition(GetActiveContext());
} else {
// If not composing, candidate window position is updated before key
// down
mSetCursorPositionOnKeyEvent = true;
}
mLayoutChanged = true;
}
void
IMContextWrapper::OnUpdateComposition()
{
if (MOZ_UNLIKELY(IsDestroyed())) {
return;
}
if (!IsComposing()) {
// Composition has been committed. So we need update selection for
// caret later
mSelection.Clear();
EnsureToCacheSelection();
mSetCursorPositionOnKeyEvent = true;
}
// If we've already set candidate window position, we don't need to update
// the position with update composition notification.
if (!mLayoutChanged) {
SetCursorPosition(GetActiveContext());
}
}
void
IMContextWrapper::SetInputContext(nsWindow* aCaller,
const InputContext* aContext,
const InputContextAction* aAction)
{
if (MOZ_UNLIKELY(IsDestroyed())) {
return;
}
MOZ_LOG(gGtkIMLog, LogLevel::Info,
("0x%p SetInputContext(aCaller=0x%p, aContext={ mIMEState={ "
"mEnabled=%s }, mHTMLInputType=%s })",
this, aCaller, GetEnabledStateName(aContext->mIMEState.mEnabled),
NS_ConvertUTF16toUTF8(aContext->mHTMLInputType).get()));
if (aCaller != mLastFocusedWindow) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p SetInputContext(), FAILED, "
"the caller isn't focused window, mLastFocusedWindow=0x%p",
this, mLastFocusedWindow));
return;
}
if (!mContext) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p SetInputContext(), FAILED, "
"there are no context",
this));
return;
}
if (sLastFocusedContext != this) {
mInputContext = *aContext;
MOZ_LOG(gGtkIMLog, LogLevel::Debug,
("0x%p SetInputContext(), succeeded, "
"but we're not active",
this));
return;
}
bool changingEnabledState =
aContext->mIMEState.mEnabled != mInputContext.mIMEState.mEnabled ||
aContext->mHTMLInputType != mInputContext.mHTMLInputType;
// Release current IME focus if IME is enabled.
if (changingEnabledState && mInputContext.mIMEState.MaybeEditable()) {
EndIMEComposition(mLastFocusedWindow);
Blur();
}
mInputContext = *aContext;
if (changingEnabledState) {
#if (MOZ_WIDGET_GTK == 3)
static bool sInputPurposeSupported = !gtk_check_version(3, 6, 0);
if (sInputPurposeSupported && mInputContext.mIMEState.MaybeEditable()) {
GtkIMContext* currentContext = GetCurrentContext();
if (currentContext) {
GtkInputPurpose purpose = GTK_INPUT_PURPOSE_FREE_FORM;
const nsString& inputType = mInputContext.mHTMLInputType;
// Password case has difficult issue. Desktop IMEs disable
// composition if input-purpose is password.
// For disabling IME on |ime-mode: disabled;|, we need to check
// mEnabled value instead of inputType value. This hack also
// enables composition on
// <input type="password" style="ime-mode: enabled;">.
// This is right behavior of ime-mode on desktop.
//
// On the other hand, IME for tablet devices may provide a
// specific software keyboard for password field. If so,
// the behavior might look strange on both:
// <input type="text" style="ime-mode: disabled;">
// <input type="password" style="ime-mode: enabled;">
//
// Temporarily, we should focus on desktop environment for now.
// I.e., let's ignore tablet devices for now. When somebody
// reports actual trouble on tablet devices, we should try to
// look for a way to solve actual problem.
if (mInputContext.mIMEState.mEnabled == IMEState::PASSWORD) {
purpose = GTK_INPUT_PURPOSE_PASSWORD;
} else if (inputType.EqualsLiteral("email")) {
purpose = GTK_INPUT_PURPOSE_EMAIL;
} else if (inputType.EqualsLiteral("url")) {
purpose = GTK_INPUT_PURPOSE_URL;
} else if (inputType.EqualsLiteral("tel")) {
purpose = GTK_INPUT_PURPOSE_PHONE;
} else if (inputType.EqualsLiteral("number")) {
purpose = GTK_INPUT_PURPOSE_NUMBER;
}
g_object_set(currentContext, "input-purpose", purpose, nullptr);
}
}
#endif // #if (MOZ_WIDGET_GTK == 3)
// Even when aState is not enabled state, we need to set IME focus.
// Because some IMs are updating the status bar of them at this time.
// Be aware, don't use aWindow here because this method shouldn't move
// focus actually.
Focus();
// XXX Should we call Blur() when it's not editable? E.g., it might be
// better to close VKB automatically.
}
}
InputContext
IMContextWrapper::GetInputContext()
{
mInputContext.mIMEState.mOpen = IMEState::OPEN_STATE_NOT_SUPPORTED;
return mInputContext;
}
GtkIMContext*
IMContextWrapper::GetCurrentContext() const
{
if (IsEnabled()) {
return mContext;
}
if (mInputContext.mIMEState.mEnabled == IMEState::PASSWORD) {
return mSimpleContext;
}
return mDummyContext;
}
bool
IMContextWrapper::IsValidContext(GtkIMContext* aContext) const
{
if (!aContext) {
return false;
}
return aContext == mContext ||
aContext == mSimpleContext ||
aContext == mDummyContext;
}
bool
IMContextWrapper::IsEnabled() const
{
return mInputContext.mIMEState.mEnabled == IMEState::ENABLED ||
mInputContext.mIMEState.mEnabled == IMEState::PLUGIN ||
(!sUseSimpleContext &&
mInputContext.mIMEState.mEnabled == IMEState::PASSWORD);
}
void
IMContextWrapper::Focus()
{
MOZ_LOG(gGtkIMLog, LogLevel::Info,
("0x%p Focus(), sLastFocusedContext=0x%p",
this, sLastFocusedContext));
if (mIsIMFocused) {
NS_ASSERTION(sLastFocusedContext == this,
"We're not active, but the IM was focused?");
return;
}
GtkIMContext* currentContext = GetCurrentContext();
if (!currentContext) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p Focus(), FAILED, there are no context",
this));
return;
}
if (sLastFocusedContext && sLastFocusedContext != this) {
sLastFocusedContext->Blur();
}
sLastFocusedContext = this;
gtk_im_context_focus_in(currentContext);
mIsIMFocused = true;
mSetCursorPositionOnKeyEvent = true;
if (!IsEnabled()) {
// We should release IME focus for uim and scim.
// These IMs are using snooper that is released at losing focus.
Blur();
}
}
void
IMContextWrapper::Blur()
{
MOZ_LOG(gGtkIMLog, LogLevel::Info,
("0x%p Blur(), mIsIMFocused=%s",
this, ToChar(mIsIMFocused)));
if (!mIsIMFocused) {
return;
}
GtkIMContext* currentContext = GetCurrentContext();
if (!currentContext) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p Blur(), FAILED, there are no context",
this));
return;
}
gtk_im_context_focus_out(currentContext);
mIsIMFocused = false;
}
void
IMContextWrapper::OnSelectionChange(nsWindow* aCaller,
const IMENotification& aIMENotification)
{
mSelection.Assign(aIMENotification);
bool retrievedSurroundingSignalReceived =
mRetrieveSurroundingSignalReceived;
mRetrieveSurroundingSignalReceived = false;
if (MOZ_UNLIKELY(IsDestroyed())) {
return;
}
const IMENotification::SelectionChangeDataBase& selectionChangeData =
aIMENotification.mSelectionChangeData;
MOZ_LOG(gGtkIMLog, LogLevel::Info,
("0x%p OnSelectionChange(aCaller=0x%p, aIMENotification={ "
"mSelectionChangeData={ mOffset=%u, Length()=%u, mReversed=%s, "
"mWritingMode=%s, mCausedByComposition=%s, "
"mCausedBySelectionEvent=%s, mOccurredDuringComposition=%s "
"} }), mCompositionState=%s, mIsDeletingSurrounding=%s, "
"mRetrieveSurroundingSignalReceived=%s",
this, aCaller, selectionChangeData.mOffset,
selectionChangeData.Length(),
ToChar(selectionChangeData.mReversed),
GetWritingModeName(selectionChangeData.GetWritingMode()).get(),
ToChar(selectionChangeData.mCausedByComposition),
ToChar(selectionChangeData.mCausedBySelectionEvent),
ToChar(selectionChangeData.mOccurredDuringComposition),
GetCompositionStateName(), ToChar(mIsDeletingSurrounding),
ToChar(retrievedSurroundingSignalReceived)));
if (aCaller != mLastFocusedWindow) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p OnSelectionChange(), FAILED, "
"the caller isn't focused window, mLastFocusedWindow=0x%p",
this, mLastFocusedWindow));
return;
}
if (!IsComposing()) {
// Now we have no composition (mostly situation on calling this method)
// If we have it, it will set by
// NOTIFY_IME_OF_COMPOSITION_EVENT_HANDLED.
mSetCursorPositionOnKeyEvent = true;
}
// The focused editor might have placeholder text with normal text node.
// In such case, the text node must be removed from a compositionstart
// event handler. So, we're dispatching eCompositionStart,
// we should ignore selection change notification.
if (mCompositionState == eCompositionState_CompositionStartDispatched) {
if (NS_WARN_IF(!mSelection.IsValid())) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p OnSelectionChange(), FAILED, "
"new offset is too large, cannot keep composing",
this));
} else {
// Modify the selection start offset with new offset.
mCompositionStart = mSelection.mOffset;
// XXX We should modify mSelectedString? But how?
MOZ_LOG(gGtkIMLog, LogLevel::Debug,
("0x%p OnSelectionChange(), ignored, mCompositionStart "
"is updated to %u, the selection change doesn't cause "
"resetting IM context",
this, mCompositionStart));
// And don't reset the IM context.
return;
}
// Otherwise, reset the IM context due to impossible to keep composing.
}
// If the selection change is caused by deleting surrounding text,
// we shouldn't need to notify IME of selection change.
if (mIsDeletingSurrounding) {
return;
}
bool occurredBeforeComposition =
IsComposing() && !selectionChangeData.mOccurredDuringComposition &&
!selectionChangeData.mCausedByComposition;
if (occurredBeforeComposition) {
mPendingResettingIMContext = true;
}
// When the selection change is caused by dispatching composition event,
// selection set event and/or occurred before starting current composition,
// we shouldn't notify IME of that and commit existing composition.
if (!selectionChangeData.mCausedByComposition &&
!selectionChangeData.mCausedBySelectionEvent &&
!occurredBeforeComposition) {
// Hack for ibus-pinyin. ibus-pinyin will synthesize a set of
// composition which commits with empty string after calling
// gtk_im_context_reset(). Therefore, selecting text causes
// unexpectedly removing it. For preventing it but not breaking the
// other IMEs which use surrounding text, we should call it only when
// surrounding text has been retrieved after last selection range was
// set. If it's not retrieved, that means that current IME doesn't
// have any content cache, so, it must not need the notification of
// selection change.
if (IsComposing() || retrievedSurroundingSignalReceived) {
ResetIME();
}
}
}
/* static */
void
IMContextWrapper::OnStartCompositionCallback(GtkIMContext* aContext,
IMContextWrapper* aModule)
{
aModule->OnStartCompositionNative(aContext);
}
void
IMContextWrapper::OnStartCompositionNative(GtkIMContext* aContext)
{
MOZ_LOG(gGtkIMLog, LogLevel::Info,
("0x%p OnStartCompositionNative(aContext=0x%p), "
"current context=0x%p",
this, aContext, GetCurrentContext()));
// See bug 472635, we should do nothing if IM context doesn't match.
if (GetCurrentContext() != aContext) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p OnStartCompositionNative(), FAILED, "
"given context doesn't match",
this));
return;
}
mComposingContext = static_cast<GtkIMContext*>(g_object_ref(aContext));
if (!DispatchCompositionStart(aContext)) {
return;
}
mCompositionTargetRange.mOffset = mCompositionStart;
mCompositionTargetRange.mLength = 0;
}
/* static */
void
IMContextWrapper::OnEndCompositionCallback(GtkIMContext* aContext,
IMContextWrapper* aModule)
{
aModule->OnEndCompositionNative(aContext);
}
void
IMContextWrapper::OnEndCompositionNative(GtkIMContext* aContext)
{
MOZ_LOG(gGtkIMLog, LogLevel::Info,
("0x%p OnEndCompositionNative(aContext=0x%p)",
this, aContext));
// See bug 472635, we should do nothing if IM context doesn't match.
// Note that if this is called after focus move, the context may different
// from any our owning context.
if (!IsValidContext(aContext)) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p OnEndCompositionNative(), FAILED, "
"given context doesn't match with any context",
this));
return;
}
g_object_unref(mComposingContext);
mComposingContext = nullptr;
// If we already handled the commit event, we should do nothing here.
if (IsComposing()) {
if (!DispatchCompositionCommitEvent(aContext)) {
// If the widget is destroyed, we should do nothing anymore.
return;
}
}
if (mPendingResettingIMContext) {
ResetIME();
}
}
/* static */
void
IMContextWrapper::OnChangeCompositionCallback(GtkIMContext* aContext,
IMContextWrapper* aModule)
{
aModule->OnChangeCompositionNative(aContext);
}
void
IMContextWrapper::OnChangeCompositionNative(GtkIMContext* aContext)
{
MOZ_LOG(gGtkIMLog, LogLevel::Info,
("0x%p OnChangeCompositionNative(aContext=0x%p)",
this, aContext));
// See bug 472635, we should do nothing if IM context doesn't match.
// Note that if this is called after focus move, the context may different
// from any our owning context.
if (!IsValidContext(aContext)) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p OnChangeCompositionNative(), FAILED, "
"given context doesn't match with any context",
this));
return;
}
nsAutoString compositionString;
GetCompositionString(aContext, compositionString);
if (!IsComposing() && compositionString.IsEmpty()) {
mDispatchedCompositionString.Truncate();
return; // Don't start the composition with empty string.
}
// Be aware, widget can be gone
DispatchCompositionChangeEvent(aContext, compositionString);
}
/* static */
gboolean
IMContextWrapper::OnRetrieveSurroundingCallback(GtkIMContext* aContext,
IMContextWrapper* aModule)
{
return aModule->OnRetrieveSurroundingNative(aContext);
}
gboolean
IMContextWrapper::OnRetrieveSurroundingNative(GtkIMContext* aContext)
{
MOZ_LOG(gGtkIMLog, LogLevel::Info,
("0x%p OnRetrieveSurroundingNative(aContext=0x%p), "
"current context=0x%p",
this, aContext, GetCurrentContext()));
// See bug 472635, we should do nothing if IM context doesn't match.
if (GetCurrentContext() != aContext) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p OnRetrieveSurroundingNative(), FAILED, "
"given context doesn't match",
this));
return FALSE;
}
nsAutoString uniStr;
uint32_t cursorPos;
if (NS_FAILED(GetCurrentParagraph(uniStr, cursorPos))) {
return FALSE;
}
NS_ConvertUTF16toUTF8 utf8Str(nsDependentSubstring(uniStr, 0, cursorPos));
uint32_t cursorPosInUTF8 = utf8Str.Length();
AppendUTF16toUTF8(nsDependentSubstring(uniStr, cursorPos), utf8Str);
gtk_im_context_set_surrounding(aContext, utf8Str.get(), utf8Str.Length(),
cursorPosInUTF8);
mRetrieveSurroundingSignalReceived = true;
return TRUE;
}
/* static */
gboolean
IMContextWrapper::OnDeleteSurroundingCallback(GtkIMContext* aContext,
gint aOffset,
gint aNChars,
IMContextWrapper* aModule)
{
return aModule->OnDeleteSurroundingNative(aContext, aOffset, aNChars);
}
gboolean
IMContextWrapper::OnDeleteSurroundingNative(GtkIMContext* aContext,
gint aOffset,
gint aNChars)
{
MOZ_LOG(gGtkIMLog, LogLevel::Info,
("0x%p OnDeleteSurroundingNative(aContext=0x%p, aOffset=%d, "
"aNChar=%d), current context=0x%p",
this, aContext, aOffset, aNChars, GetCurrentContext()));
// See bug 472635, we should do nothing if IM context doesn't match.
if (GetCurrentContext() != aContext) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p OnDeleteSurroundingNative(), FAILED, "
"given context doesn't match",
this));
return FALSE;
}
AutoRestore<bool> saveDeletingSurrounding(mIsDeletingSurrounding);
mIsDeletingSurrounding = true;
if (NS_SUCCEEDED(DeleteText(aContext, aOffset, (uint32_t)aNChars))) {
return TRUE;
}
// failed
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p OnDeleteSurroundingNative(), FAILED, "
"cannot delete text",
this));
return FALSE;
}
/* static */
void
IMContextWrapper::OnCommitCompositionCallback(GtkIMContext* aContext,
const gchar* aString,
IMContextWrapper* aModule)
{
aModule->OnCommitCompositionNative(aContext, aString);
}
void
IMContextWrapper::OnCommitCompositionNative(GtkIMContext* aContext,
const gchar* aUTF8Char)
{
const gchar emptyStr = 0;
const gchar *commitString = aUTF8Char ? aUTF8Char : &emptyStr;
MOZ_LOG(gGtkIMLog, LogLevel::Info,
("0x%p OnCommitCompositionNative(aContext=0x%p), "
"current context=0x%p, active context=0x%p, commitString=\"%s\", "
"mProcessingKeyEvent=0x%p, IsComposingOn(aContext)=%s",
this, aContext, GetCurrentContext(), GetActiveContext(), commitString,
mProcessingKeyEvent, ToChar(IsComposingOn(aContext))));
// See bug 472635, we should do nothing if IM context doesn't match.
if (!IsValidContext(aContext)) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p OnCommitCompositionNative(), FAILED, "
"given context doesn't match",
this));
return;
}
// If we are not in composition and committing with empty string,
// we need to do nothing because if we continued to handle this
// signal, we would dispatch compositionstart, text, compositionend
// events with empty string. Of course, they are unnecessary events
// for Web applications and our editor.
if (!IsComposingOn(aContext) && !commitString[0]) {
return;
}
// If IME doesn't change their keyevent that generated this commit,
// don't send it through XIM - just send it as a normal key press
// event.
// NOTE: While a key event is being handled, this might be caused on
// current context. Otherwise, this may be caused on active context.
if (!IsComposingOn(aContext) && mProcessingKeyEvent &&
aContext == GetCurrentContext()) {
char keyval_utf8[8]; /* should have at least 6 bytes of space */
gint keyval_utf8_len;
guint32 keyval_unicode;
keyval_unicode = gdk_keyval_to_unicode(mProcessingKeyEvent->keyval);
keyval_utf8_len = g_unichar_to_utf8(keyval_unicode, keyval_utf8);
keyval_utf8[keyval_utf8_len] = '\0';
if (!strcmp(commitString, keyval_utf8)) {
MOZ_LOG(gGtkIMLog, LogLevel::Info,
("0x%p OnCommitCompositionNative(), "
"we'll send normal key event",
this));
mFilterKeyEvent = false;
return;
}
}
NS_ConvertUTF8toUTF16 str(commitString);
// Be aware, widget can be gone
DispatchCompositionCommitEvent(aContext, &str);
}
void
IMContextWrapper::GetCompositionString(GtkIMContext* aContext,
nsAString& aCompositionString)
{
gchar *preedit_string;
gint cursor_pos;
PangoAttrList *feedback_list;
gtk_im_context_get_preedit_string(aContext, &preedit_string,
&feedback_list, &cursor_pos);
if (preedit_string && *preedit_string) {
CopyUTF8toUTF16(preedit_string, aCompositionString);
} else {
aCompositionString.Truncate();
}
MOZ_LOG(gGtkIMLog, LogLevel::Info,
("0x%p GetCompositionString(aContext=0x%p), "
"aCompositionString=\"%s\"",
this, aContext, preedit_string));
pango_attr_list_unref(feedback_list);
g_free(preedit_string);
}
bool
IMContextWrapper::DispatchCompositionStart(GtkIMContext* aContext)
{
MOZ_LOG(gGtkIMLog, LogLevel::Info,
("0x%p DispatchCompositionStart(aContext=0x%p)",
this, aContext));
if (IsComposing()) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p DispatchCompositionStart(), FAILED, "
"we're already in composition",
this));
return true;
}
if (!mLastFocusedWindow) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p DispatchCompositionStart(), FAILED, "
"there are no focused window in this module",
this));
return false;
}
if (NS_WARN_IF(!EnsureToCacheSelection())) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p DispatchCompositionStart(), FAILED, "
"cannot query the selection offset",
this));
return false;
}
// Keep the last focused window alive
RefPtr<nsWindow> lastFocusedWindow(mLastFocusedWindow);
// XXX The composition start point might be changed by composition events
// even though we strongly hope it doesn't happen.
// Every composition event should have the start offset for the result
// because it may high cost if we query the offset every time.
mCompositionStart = mSelection.mOffset;
mDispatchedCompositionString.Truncate();
if (mProcessingKeyEvent && !mKeyDownEventWasSent &&
mProcessingKeyEvent->type == GDK_KEY_PRESS) {
// If this composition is started by a native keydown event, we need to
// dispatch our keydown event here (before composition start).
bool isCancelled;
mLastFocusedWindow->DispatchKeyDownEvent(mProcessingKeyEvent,
&isCancelled);
MOZ_LOG(gGtkIMLog, LogLevel::Debug,
("0x%p DispatchCompositionStart(), FAILED, keydown event "
"is dispatched",
this));
if (lastFocusedWindow->IsDestroyed() ||
lastFocusedWindow != mLastFocusedWindow) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p DispatchCompositionStart(), FAILED, the focused "
"widget was destroyed/changed by keydown event",
this));
return false;
}
}
RefPtr<TextEventDispatcher> dispatcher = GetTextEventDispatcher();
nsresult rv = dispatcher->BeginNativeInputTransaction();
if (NS_WARN_IF(NS_FAILED(rv))) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p DispatchCompositionStart(), FAILED, "
"due to BeginNativeInputTransaction() failure",
this));
return false;
}
MOZ_LOG(gGtkIMLog, LogLevel::Debug,
("0x%p DispatchCompositionStart(), dispatching "
"compositionstart... (mCompositionStart=%u)",
this, mCompositionStart));
mCompositionState = eCompositionState_CompositionStartDispatched;
nsEventStatus status;
dispatcher->StartComposition(status);
if (lastFocusedWindow->IsDestroyed() ||
lastFocusedWindow != mLastFocusedWindow) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p DispatchCompositionStart(), FAILED, the focused "
"widget was destroyed/changed by compositionstart event",
this));
return false;
}
return true;
}
bool
IMContextWrapper::DispatchCompositionChangeEvent(
GtkIMContext* aContext,
const nsAString& aCompositionString)
{
MOZ_LOG(gGtkIMLog, LogLevel::Info,
("0x%p DispatchCompositionChangeEvent(aContext=0x%p)",
this, aContext));
if (!mLastFocusedWindow) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p DispatchCompositionChangeEvent(), FAILED, "
"there are no focused window in this module",
this));
return false;
}
if (!IsComposing()) {
MOZ_LOG(gGtkIMLog, LogLevel::Debug,
("0x%p DispatchCompositionChangeEvent(), the composition "
"wasn't started, force starting...",
this));
if (!DispatchCompositionStart(aContext)) {
return false;
}
}
RefPtr<TextEventDispatcher> dispatcher = GetTextEventDispatcher();
nsresult rv = dispatcher->BeginNativeInputTransaction();
if (NS_WARN_IF(NS_FAILED(rv))) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p DispatchCompositionChangeEvent(), FAILED, "
"due to BeginNativeInputTransaction() failure",
this));
return false;
}
// Store the selected string which will be removed by following
// compositionchange event.
if (mCompositionState == eCompositionState_CompositionStartDispatched) {
if (NS_WARN_IF(!EnsureToCacheSelection(&mSelectedString))) {
// XXX How should we behave in this case??
} else {
// XXX We should assume, for now, any web applications don't change
// selection at handling this compositionchange event.
mCompositionStart = mSelection.mOffset;
}
}
RefPtr<TextRangeArray> rangeArray =
CreateTextRangeArray(aContext, aCompositionString);
rv = dispatcher->SetPendingComposition(aCompositionString, rangeArray);
if (NS_WARN_IF(NS_FAILED(rv))) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p DispatchCompositionChangeEvent(), FAILED, "
"due to SetPendingComposition() failure",
this));
return false;
}
mCompositionState = eCompositionState_CompositionChangeEventDispatched;
// We cannot call SetCursorPosition for e10s-aware.
// DispatchEvent is async on e10s, so composition rect isn't updated now
// on tab parent.
mDispatchedCompositionString = aCompositionString;
mLayoutChanged = false;
mCompositionTargetRange.mOffset =
mCompositionStart + rangeArray->TargetClauseOffset();
mCompositionTargetRange.mLength = rangeArray->TargetClauseLength();
RefPtr<nsWindow> lastFocusedWindow(mLastFocusedWindow);
nsEventStatus status;
rv = dispatcher->FlushPendingComposition(status);
if (NS_WARN_IF(NS_FAILED(rv))) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p DispatchCompositionChangeEvent(), FAILED, "
"due to FlushPendingComposition() failure",
this));
return false;
}
if (lastFocusedWindow->IsDestroyed() ||
lastFocusedWindow != mLastFocusedWindow) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p DispatchCompositionChangeEvent(), FAILED, the "
"focused widget was destroyed/changed by "
"compositionchange event",
this));
return false;
}
return true;
}
bool
IMContextWrapper::DispatchCompositionCommitEvent(
GtkIMContext* aContext,
const nsAString* aCommitString)
{
MOZ_LOG(gGtkIMLog, LogLevel::Info,
("0x%p DispatchCompositionCommitEvent(aContext=0x%p, "
"aCommitString=0x%p, (\"%s\"))",
this, aContext, aCommitString,
aCommitString ? NS_ConvertUTF16toUTF8(*aCommitString).get() : ""));
if (!mLastFocusedWindow) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p DispatchCompositionCommitEvent(), FAILED, "
"there are no focused window in this module",
this));
return false;
}
if (!IsComposing()) {
if (!aCommitString || aCommitString->IsEmpty()) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p DispatchCompositionCommitEvent(), FAILED, "
"there is no composition and empty commit string",
this));
return true;
}
MOZ_LOG(gGtkIMLog, LogLevel::Debug,
("0x%p DispatchCompositionCommitEvent(), "
"the composition wasn't started, force starting...",
this));
if (!DispatchCompositionStart(aContext)) {
return false;
}
}
RefPtr<TextEventDispatcher> dispatcher = GetTextEventDispatcher();
nsresult rv = dispatcher->BeginNativeInputTransaction();
if (NS_WARN_IF(NS_FAILED(rv))) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p DispatchCompositionCommitEvent(), FAILED, "
"due to BeginNativeInputTransaction() failure",
this));
return false;
}
RefPtr<nsWindow> lastFocusedWindow(mLastFocusedWindow);
mCompositionState = eCompositionState_NotComposing;
mCompositionStart = UINT32_MAX;
mCompositionTargetRange.Clear();
mDispatchedCompositionString.Truncate();
nsEventStatus status;
rv = dispatcher->CommitComposition(status, aCommitString);
if (NS_WARN_IF(NS_FAILED(rv))) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p DispatchCompositionChangeEvent(), FAILED, "
"due to CommitComposition() failure",
this));
return false;
}
if (lastFocusedWindow->IsDestroyed() ||
lastFocusedWindow != mLastFocusedWindow) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p DispatchCompositionCommitEvent(), FAILED, "
"the focused widget was destroyed/changed by "
"compositioncommit event",
this));
return false;
}
return true;
}
already_AddRefed<TextRangeArray>
IMContextWrapper::CreateTextRangeArray(GtkIMContext* aContext,
const nsAString& aCompositionString)
{
MOZ_LOG(gGtkIMLog, LogLevel::Info,
("0x%p CreateTextRangeArray(aContext=0x%p, "
"aCompositionString=\"%s\" (Length()=%u))",
this, aContext, NS_ConvertUTF16toUTF8(aCompositionString).get(),
aCompositionString.Length()));
RefPtr<TextRangeArray> textRangeArray = new TextRangeArray();
gchar *preedit_string;
gint cursor_pos_in_chars;
PangoAttrList *feedback_list;
gtk_im_context_get_preedit_string(aContext, &preedit_string,
&feedback_list, &cursor_pos_in_chars);
if (!preedit_string || !*preedit_string) {
if (!aCompositionString.IsEmpty()) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p CreateTextRangeArray(), FAILED, due to "
"preedit_string is null",
this));
}
pango_attr_list_unref(feedback_list);
g_free(preedit_string);
return textRangeArray.forget();
}
// Convert caret offset from offset in characters to offset in UTF-16
// string. If we couldn't proper offset in UTF-16 string, we should
// assume that the caret is at the end of the composition string.
uint32_t caretOffsetInUTF16 = aCompositionString.Length();
if (NS_WARN_IF(cursor_pos_in_chars < 0)) {
// Note that this case is undocumented. We should assume that the
// caret is at the end of the composition string.
} else if (cursor_pos_in_chars == 0) {
caretOffsetInUTF16 = 0;
} else {
gchar* charAfterCaret =
g_utf8_offset_to_pointer(preedit_string, cursor_pos_in_chars);
if (NS_WARN_IF(!charAfterCaret)) {
MOZ_LOG(gGtkIMLog, LogLevel::Warning,
("0x%p CreateTextRangeArray(), failed to get UTF-8 "
"string before the caret (cursor_pos_in_chars=%d)",
this, cursor_pos_in_chars));
} else {
glong caretOffset = 0;
gunichar2* utf16StrBeforeCaret =
g_utf8_to_utf16(preedit_string, charAfterCaret - preedit_string,
nullptr, &caretOffset, nullptr);
if (NS_WARN_IF(!utf16StrBeforeCaret) ||
NS_WARN_IF(caretOffset < 0)) {
MOZ_LOG(gGtkIMLog, LogLevel::Warning,
("0x%p CreateTextRangeArray(), WARNING, failed to "
"convert to UTF-16 string before the caret "
"(cursor_pos_in_chars=%d, caretOffset=%d)",
this, cursor_pos_in_chars, caretOffset));
} else {
caretOffsetInUTF16 = static_cast<uint32_t>(caretOffset);
uint32_t compositionStringLength = aCompositionString.Length();
if (NS_WARN_IF(caretOffsetInUTF16 > compositionStringLength)) {
MOZ_LOG(gGtkIMLog, LogLevel::Warning,
("0x%p CreateTextRangeArray(), WARNING, "
"caretOffsetInUTF16=%u is larger than "
"compositionStringLength=%u",
this, caretOffsetInUTF16, compositionStringLength));
caretOffsetInUTF16 = compositionStringLength;
}
}
if (utf16StrBeforeCaret) {
g_free(utf16StrBeforeCaret);
}
}
}
PangoAttrIterator* iter;
iter = pango_attr_list_get_iterator(feedback_list);
if (!iter) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p CreateTextRangeArray(), FAILED, iterator couldn't "
"be allocated",
this));
pango_attr_list_unref(feedback_list);
g_free(preedit_string);
return textRangeArray.forget();
}
uint32_t minOffsetOfClauses = aCompositionString.Length();
do {
TextRange range;
if (!SetTextRange(iter, preedit_string, caretOffsetInUTF16, range)) {
continue;
}
MOZ_ASSERT(range.Length());
minOffsetOfClauses = std::min(minOffsetOfClauses, range.mStartOffset);
textRangeArray->AppendElement(range);
} while (pango_attr_iterator_next(iter));
// If the IME doesn't define clause from the start of the composition,
// we should insert dummy clause information since TextRangeArray assumes
// that there must be a clause whose start is 0 when there is one or
// more clauses.
if (minOffsetOfClauses) {
TextRange dummyClause;
dummyClause.mStartOffset = 0;
dummyClause.mEndOffset = minOffsetOfClauses;
dummyClause.mRangeType = TextRangeType::eRawClause;
textRangeArray->InsertElementAt(0, dummyClause);
MOZ_LOG(gGtkIMLog, LogLevel::Warning,
("0x%p CreateTextRangeArray(), inserting a dummy clause "
"at the beginning of the composition string mStartOffset=%u, "
"mEndOffset=%u, mRangeType=%s",
this, dummyClause.mStartOffset, dummyClause.mEndOffset,
ToChar(dummyClause.mRangeType)));
}
TextRange range;
range.mStartOffset = range.mEndOffset = caretOffsetInUTF16;
range.mRangeType = TextRangeType::eCaret;
textRangeArray->AppendElement(range);
MOZ_LOG(gGtkIMLog, LogLevel::Debug,
("0x%p CreateTextRangeArray(), mStartOffset=%u, "
"mEndOffset=%u, mRangeType=%s",
this, range.mStartOffset, range.mEndOffset,
ToChar(range.mRangeType)));
pango_attr_iterator_destroy(iter);
pango_attr_list_unref(feedback_list);
g_free(preedit_string);
return textRangeArray.forget();
}
/* static */
nscolor
IMContextWrapper::ToNscolor(PangoAttrColor* aPangoAttrColor)
{
PangoColor& pangoColor = aPangoAttrColor->color;
uint8_t r = pangoColor.red / 0x100;
uint8_t g = pangoColor.green / 0x100;
uint8_t b = pangoColor.blue / 0x100;
return NS_RGB(r, g, b);
}
bool
IMContextWrapper::SetTextRange(PangoAttrIterator* aPangoAttrIter,
const gchar* aUTF8CompositionString,
uint32_t aUTF16CaretOffset,
TextRange& aTextRange) const
{
// Set the range offsets in UTF-16 string.
gint utf8ClauseStart, utf8ClauseEnd;
pango_attr_iterator_range(aPangoAttrIter, &utf8ClauseStart, &utf8ClauseEnd);
if (utf8ClauseStart == utf8ClauseEnd) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p SetTextRange(), FAILED, due to collapsed range",
this));
return false;
}
if (!utf8ClauseStart) {
aTextRange.mStartOffset = 0;
} else {
glong utf16PreviousClausesLength;
gunichar2* utf16PreviousClausesString =
g_utf8_to_utf16(aUTF8CompositionString, utf8ClauseStart, nullptr,
&utf16PreviousClausesLength, nullptr);
if (NS_WARN_IF(!utf16PreviousClausesString)) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p SetTextRange(), FAILED, due to g_utf8_to_utf16() "
"failure (retrieving previous string of current clause)",
this));
return false;
}
aTextRange.mStartOffset = utf16PreviousClausesLength;
g_free(utf16PreviousClausesString);
}
glong utf16CurrentClauseLength;
gunichar2* utf16CurrentClauseString =
g_utf8_to_utf16(aUTF8CompositionString + utf8ClauseStart,
utf8ClauseEnd - utf8ClauseStart,
nullptr, &utf16CurrentClauseLength, nullptr);
if (NS_WARN_IF(!utf16CurrentClauseString)) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p SetTextRange(), FAILED, due to g_utf8_to_utf16() "
"failure (retrieving current clause)",
this));
return false;
}
// iBus Chewing IME tells us that there is an empty clause at the end of
// the composition string but we should ignore it since our code doesn't
// assume that there is an empty clause.
if (!utf16CurrentClauseLength) {
MOZ_LOG(gGtkIMLog, LogLevel::Warning,
("0x%p SetTextRange(), FAILED, due to current clause length "
"is 0",
this));
return false;
}
aTextRange.mEndOffset = aTextRange.mStartOffset + utf16CurrentClauseLength;
g_free(utf16CurrentClauseString);
utf16CurrentClauseString = nullptr;
// Set styles
TextRangeStyle& style = aTextRange.mRangeStyle;
// Underline
PangoAttrInt* attrUnderline =
reinterpret_cast<PangoAttrInt*>(
pango_attr_iterator_get(aPangoAttrIter, PANGO_ATTR_UNDERLINE));
if (attrUnderline) {
switch (attrUnderline->value) {
case PANGO_UNDERLINE_NONE:
style.mLineStyle = TextRangeStyle::LINESTYLE_NONE;
break;
case PANGO_UNDERLINE_DOUBLE:
style.mLineStyle = TextRangeStyle::LINESTYLE_DOUBLE;
break;
case PANGO_UNDERLINE_ERROR:
style.mLineStyle = TextRangeStyle::LINESTYLE_WAVY;
break;
case PANGO_UNDERLINE_SINGLE:
case PANGO_UNDERLINE_LOW:
style.mLineStyle = TextRangeStyle::LINESTYLE_SOLID;
break;
default:
MOZ_LOG(gGtkIMLog, LogLevel::Warning,
("0x%p SetTextRange(), retrieved unknown underline "
"style: %d",
this, attrUnderline->value));
style.mLineStyle = TextRangeStyle::LINESTYLE_SOLID;
break;
}
style.mDefinedStyles |= TextRangeStyle::DEFINED_LINESTYLE;
// Underline color
PangoAttrColor* attrUnderlineColor =
reinterpret_cast<PangoAttrColor*>(
pango_attr_iterator_get(aPangoAttrIter,
PANGO_ATTR_UNDERLINE_COLOR));
if (attrUnderlineColor) {
style.mUnderlineColor = ToNscolor(attrUnderlineColor);
style.mDefinedStyles |= TextRangeStyle::DEFINED_UNDERLINE_COLOR;
}
} else {
style.mLineStyle = TextRangeStyle::LINESTYLE_NONE;
style.mDefinedStyles |= TextRangeStyle::DEFINED_LINESTYLE;
}
// Don't set colors if they are not specified. They should be computed by
// textframe if only one of the colors are specified.
// Foreground color (text color)
PangoAttrColor* attrForeground =
reinterpret_cast<PangoAttrColor*>(
pango_attr_iterator_get(aPangoAttrIter, PANGO_ATTR_FOREGROUND));
if (attrForeground) {
style.mForegroundColor = ToNscolor(attrForeground);
style.mDefinedStyles |= TextRangeStyle::DEFINED_FOREGROUND_COLOR;
}
// Background color
PangoAttrColor* attrBackground =
reinterpret_cast<PangoAttrColor*>(
pango_attr_iterator_get(aPangoAttrIter, PANGO_ATTR_BACKGROUND));
if (attrBackground) {
style.mBackgroundColor = ToNscolor(attrBackground);
style.mDefinedStyles |= TextRangeStyle::DEFINED_BACKGROUND_COLOR;
}
/**
* We need to judge the meaning of the clause for a11y. Before we support
* IME specific composition string style, we used following rules:
*
* 1: If attrUnderline and attrForground are specified, we assumed the
* clause is TextRangeType::eSelectedClause.
* 2: If only attrUnderline is specified, we assumed the clause is
* TextRangeType::eConvertedClause.
* 3: If only attrForground is specified, we assumed the clause is
* TextRangeType::eSelectedRawClause.
* 4: If neither attrUnderline nor attrForeground is specified, we assumed
* the clause is TextRangeType::eRawClause.
*
* However, this rules are odd since there can be two or more selected
* clauses. Additionally, our old rules caused that IME developers/users
* cannot specify composition string style as they want.
*
* So, we shouldn't guess the meaning from its visual style.
*/
if (!attrUnderline && !attrForeground && !attrBackground) {
MOZ_LOG(gGtkIMLog, LogLevel::Warning,
("0x%p SetTextRange(), FAILED, due to no attr, "
"aTextRange= { mStartOffset=%u, mEndOffset=%u }",
this, aTextRange.mStartOffset, aTextRange.mEndOffset));
return false;
}
// If the range covers whole of composition string and the caret is at
// the end of the composition string, the range is probably not converted.
if (!utf8ClauseStart &&
utf8ClauseEnd == static_cast<gint>(strlen(aUTF8CompositionString)) &&
aTextRange.mEndOffset == aUTF16CaretOffset) {
aTextRange.mRangeType = TextRangeType::eRawClause;
}
// Typically, the caret is set at the start of the selected clause.
// So, if the caret is in the clause, we can assume that the clause is
// selected.
else if (aTextRange.mStartOffset <= aUTF16CaretOffset &&
aTextRange.mEndOffset > aUTF16CaretOffset) {
aTextRange.mRangeType = TextRangeType::eSelectedClause;
}
// Otherwise, we should assume that the clause is converted but not
// selected.
else {
aTextRange.mRangeType = TextRangeType::eConvertedClause;
}
MOZ_LOG(gGtkIMLog, LogLevel::Debug,
("0x%p SetTextRange(), succeeded, aTextRange= { "
"mStartOffset=%u, mEndOffset=%u, mRangeType=%s, mRangeStyle=%s }",
this, aTextRange.mStartOffset, aTextRange.mEndOffset,
ToChar(aTextRange.mRangeType),
GetTextRangeStyleText(aTextRange.mRangeStyle).get()));
return true;
}
void
IMContextWrapper::SetCursorPosition(GtkIMContext* aContext)
{
MOZ_LOG(gGtkIMLog, LogLevel::Info,
("0x%p SetCursorPosition(aContext=0x%p), "
"mCompositionTargetRange={ mOffset=%u, mLength=%u }"
"mSelection={ mOffset=%u, mLength=%u, mWritingMode=%s }",
this, aContext, mCompositionTargetRange.mOffset,
mCompositionTargetRange.mLength,
mSelection.mOffset, mSelection.mLength,
GetWritingModeName(mSelection.mWritingMode).get()));
bool useCaret = false;
if (!mCompositionTargetRange.IsValid()) {
if (!mSelection.IsValid()) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p SetCursorPosition(), FAILED, "
"mCompositionTargetRange and mSelection are invalid",
this));
return;
}
useCaret = true;
}
if (!mLastFocusedWindow) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p SetCursorPosition(), FAILED, due to no focused "
"window",
this));
return;
}
if (MOZ_UNLIKELY(!aContext)) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p SetCursorPosition(), FAILED, due to no context",
this));
return;
}
WidgetQueryContentEvent charRect(true,
useCaret ? eQueryCaretRect :
eQueryTextRect,
mLastFocusedWindow);
if (useCaret) {
charRect.InitForQueryCaretRect(mSelection.mOffset);
} else {
if (mSelection.mWritingMode.IsVertical()) {
// For preventing the candidate window to overlap the target
// clause, we should set fake (typically, very tall) caret rect.
uint32_t length = mCompositionTargetRange.mLength ?
mCompositionTargetRange.mLength : 1;
charRect.InitForQueryTextRect(mCompositionTargetRange.mOffset,
length);
} else {
charRect.InitForQueryTextRect(mCompositionTargetRange.mOffset, 1);
}
}
InitEvent(charRect);
nsEventStatus status;
mLastFocusedWindow->DispatchEvent(&charRect, status);
if (!charRect.mSucceeded) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p SetCursorPosition(), FAILED, %s was failed",
this, useCaret ? "eQueryCaretRect" : "eQueryTextRect"));
return;
}
nsWindow* rootWindow =
static_cast<nsWindow*>(mLastFocusedWindow->GetTopLevelWidget());
// Get the position of the rootWindow in screen.
LayoutDeviceIntPoint root = rootWindow->WidgetToScreenOffset();
// Get the position of IM context owner window in screen.
LayoutDeviceIntPoint owner = mOwnerWindow->WidgetToScreenOffset();
// Compute the caret position in the IM owner window.
LayoutDeviceIntRect rect = charRect.mReply.mRect + root - owner;
rect.width = 0;
GdkRectangle area = rootWindow->DevicePixelsToGdkRectRoundOut(rect);
gtk_im_context_set_cursor_location(aContext, &area);
}
nsresult
IMContextWrapper::GetCurrentParagraph(nsAString& aText,
uint32_t& aCursorPos)
{
MOZ_LOG(gGtkIMLog, LogLevel::Info,
("0x%p GetCurrentParagraph(), mCompositionState=%s",
this, GetCompositionStateName()));
if (!mLastFocusedWindow) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p GetCurrentParagraph(), FAILED, there are no "
"focused window in this module",
this));
return NS_ERROR_NULL_POINTER;
}
nsEventStatus status;
uint32_t selOffset = mCompositionStart;
uint32_t selLength = mSelectedString.Length();
// If focused editor doesn't have composition string, we should use
// current selection.
if (!EditorHasCompositionString()) {
// Query cursor position & selection
if (NS_WARN_IF(!EnsureToCacheSelection())) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p GetCurrentParagraph(), FAILED, due to no "
"valid selection information",
this));
return NS_ERROR_FAILURE;
}
selOffset = mSelection.mOffset;
selLength = mSelection.mLength;
}
MOZ_LOG(gGtkIMLog, LogLevel::Debug,
("0x%p GetCurrentParagraph(), selOffset=%u, selLength=%u",
this, selOffset, selLength));
// XXX nsString::Find and nsString::RFind take int32_t for offset, so,
// we cannot support this request when the current offset is larger
// than INT32_MAX.
if (selOffset > INT32_MAX || selLength > INT32_MAX ||
selOffset + selLength > INT32_MAX) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p GetCurrentParagraph(), FAILED, The selection is "
"out of range",
this));
return NS_ERROR_FAILURE;
}
// Get all text contents of the focused editor
WidgetQueryContentEvent queryTextContentEvent(true, eQueryTextContent,
mLastFocusedWindow);
queryTextContentEvent.InitForQueryTextContent(0, UINT32_MAX);
mLastFocusedWindow->DispatchEvent(&queryTextContentEvent, status);
NS_ENSURE_TRUE(queryTextContentEvent.mSucceeded, NS_ERROR_FAILURE);
nsAutoString textContent(queryTextContentEvent.mReply.mString);
if (selOffset + selLength > textContent.Length()) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p GetCurrentParagraph(), FAILED, The selection is "
"invalid, textContent.Length()=%u",
this, textContent.Length()));
return NS_ERROR_FAILURE;
}
// Remove composing string and restore the selected string because
// GtkEntry doesn't remove selected string until committing, however,
// our editor does it. We should emulate the behavior for IME.
if (EditorHasCompositionString() &&
mDispatchedCompositionString != mSelectedString) {
textContent.Replace(mCompositionStart,
mDispatchedCompositionString.Length(), mSelectedString);
}
// Get only the focused paragraph, by looking for newlines
int32_t parStart = (selOffset == 0) ? 0 :
textContent.RFind("\n", false, selOffset - 1, -1) + 1;
int32_t parEnd = textContent.Find("\n", false, selOffset + selLength, -1);
if (parEnd < 0) {
parEnd = textContent.Length();
}
aText = nsDependentSubstring(textContent, parStart, parEnd - parStart);
aCursorPos = selOffset - uint32_t(parStart);
MOZ_LOG(gGtkIMLog, LogLevel::Debug,
("0x%p GetCurrentParagraph(), succeeded, aText=%s, "
"aText.Length()=%u, aCursorPos=%u",
this, NS_ConvertUTF16toUTF8(aText).get(),
aText.Length(), aCursorPos));
return NS_OK;
}
nsresult
IMContextWrapper::DeleteText(GtkIMContext* aContext,
int32_t aOffset,
uint32_t aNChars)
{
MOZ_LOG(gGtkIMLog, LogLevel::Info,
("0x%p DeleteText(aContext=0x%p, aOffset=%d, aNChars=%u), "
"mCompositionState=%s",
this, aContext, aOffset, aNChars, GetCompositionStateName()));
if (!mLastFocusedWindow) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p DeleteText(), FAILED, there are no focused window "
"in this module",
this));
return NS_ERROR_NULL_POINTER;
}
if (!aNChars) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p DeleteText(), FAILED, aNChars must not be zero",
this));
return NS_ERROR_INVALID_ARG;
}
RefPtr<nsWindow> lastFocusedWindow(mLastFocusedWindow);
nsEventStatus status;
// First, we should cancel current composition because editor cannot
// handle changing selection and deleting text.
uint32_t selOffset;
bool wasComposing = IsComposing();
bool editorHadCompositionString = EditorHasCompositionString();
if (wasComposing) {
selOffset = mCompositionStart;
if (!DispatchCompositionCommitEvent(aContext, &mSelectedString)) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p DeleteText(), FAILED, quitting from DeletText",
this));
return NS_ERROR_FAILURE;
}
} else {
if (NS_WARN_IF(!EnsureToCacheSelection())) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p DeleteText(), FAILED, due to no valid selection "
"information",
this));
return NS_ERROR_FAILURE;
}
selOffset = mSelection.mOffset;
}
// Get all text contents of the focused editor
WidgetQueryContentEvent queryTextContentEvent(true, eQueryTextContent,
mLastFocusedWindow);
queryTextContentEvent.InitForQueryTextContent(0, UINT32_MAX);
mLastFocusedWindow->DispatchEvent(&queryTextContentEvent, status);
NS_ENSURE_TRUE(queryTextContentEvent.mSucceeded, NS_ERROR_FAILURE);
if (queryTextContentEvent.mReply.mString.IsEmpty()) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p DeleteText(), FAILED, there is no contents",
this));
return NS_ERROR_FAILURE;
}
NS_ConvertUTF16toUTF8 utf8Str(
nsDependentSubstring(queryTextContentEvent.mReply.mString,
0, selOffset));
glong offsetInUTF8Characters =
g_utf8_strlen(utf8Str.get(), utf8Str.Length()) + aOffset;
if (offsetInUTF8Characters < 0) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p DeleteText(), FAILED, aOffset is too small for "
"current cursor pos (computed offset: %d)",
this, offsetInUTF8Characters));
return NS_ERROR_FAILURE;
}
AppendUTF16toUTF8(
nsDependentSubstring(queryTextContentEvent.mReply.mString, selOffset),
utf8Str);
glong countOfCharactersInUTF8 =
g_utf8_strlen(utf8Str.get(), utf8Str.Length());
glong endInUTF8Characters =
offsetInUTF8Characters + aNChars;
if (countOfCharactersInUTF8 < endInUTF8Characters) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p DeleteText(), FAILED, aNChars is too large for "
"current contents (content length: %d, computed end offset: %d)",
this, countOfCharactersInUTF8, endInUTF8Characters));
return NS_ERROR_FAILURE;
}
gchar* charAtOffset =
g_utf8_offset_to_pointer(utf8Str.get(), offsetInUTF8Characters);
gchar* charAtEnd =
g_utf8_offset_to_pointer(utf8Str.get(), endInUTF8Characters);
// Set selection to delete
WidgetSelectionEvent selectionEvent(true, eSetSelection,
mLastFocusedWindow);
nsDependentCSubstring utf8StrBeforeOffset(utf8Str, 0,
charAtOffset - utf8Str.get());
selectionEvent.mOffset =
NS_ConvertUTF8toUTF16(utf8StrBeforeOffset).Length();
nsDependentCSubstring utf8DeletingStr(utf8Str,
utf8StrBeforeOffset.Length(),
charAtEnd - charAtOffset);
selectionEvent.mLength =
NS_ConvertUTF8toUTF16(utf8DeletingStr).Length();
selectionEvent.mReversed = false;
selectionEvent.mExpandToClusterBoundary = false;
lastFocusedWindow->DispatchEvent(&selectionEvent, status);
if (!selectionEvent.mSucceeded ||
lastFocusedWindow != mLastFocusedWindow ||
lastFocusedWindow->Destroyed()) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p DeleteText(), FAILED, setting selection caused "
"focus change or window destroyed",
this));
return NS_ERROR_FAILURE;
}
// Delete the selection
WidgetContentCommandEvent contentCommandEvent(true, eContentCommandDelete,
mLastFocusedWindow);
mLastFocusedWindow->DispatchEvent(&contentCommandEvent, status);
if (!contentCommandEvent.mSucceeded ||
lastFocusedWindow != mLastFocusedWindow ||
lastFocusedWindow->Destroyed()) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p DeleteText(), FAILED, deleting the selection caused "
"focus change or window destroyed",
this));
return NS_ERROR_FAILURE;
}
if (!wasComposing) {
return NS_OK;
}
// Restore the composition at new caret position.
if (!DispatchCompositionStart(aContext)) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p DeleteText(), FAILED, resterting composition start",
this));
return NS_ERROR_FAILURE;
}
if (!editorHadCompositionString) {
return NS_OK;
}
nsAutoString compositionString;
GetCompositionString(aContext, compositionString);
if (!DispatchCompositionChangeEvent(aContext, compositionString)) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p DeleteText(), FAILED, restoring composition string",
this));
return NS_ERROR_FAILURE;
}
return NS_OK;
}
void
IMContextWrapper::InitEvent(WidgetGUIEvent& aEvent)
{
aEvent.mTime = PR_Now() / 1000;
}
bool
IMContextWrapper::EnsureToCacheSelection(nsAString* aSelectedString)
{
if (aSelectedString) {
aSelectedString->Truncate();
}
if (mSelection.IsValid() &&
(!mSelection.Collapsed() || !aSelectedString)) {
return true;
}
if (NS_WARN_IF(!mLastFocusedWindow)) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p EnsureToCacheSelection(), FAILED, due to "
"no focused window",
this));
return false;
}
nsEventStatus status;
WidgetQueryContentEvent selection(true, eQuerySelectedText,
mLastFocusedWindow);
InitEvent(selection);
mLastFocusedWindow->DispatchEvent(&selection, status);
if (NS_WARN_IF(!selection.mSucceeded)) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p EnsureToCacheSelection(), FAILED, due to "
"failure of query selection event",
this));
return false;
}
mSelection.Assign(selection);
if (!mSelection.IsValid()) {
MOZ_LOG(gGtkIMLog, LogLevel::Error,
("0x%p EnsureToCacheSelection(), FAILED, due to "
"failure of query selection event (invalid result)",
this));
return false;
}
if (!mSelection.Collapsed() && aSelectedString) {
aSelectedString->Assign(selection.mReply.mString);
}
MOZ_LOG(gGtkIMLog, LogLevel::Debug,
("0x%p EnsureToCacheSelection(), Succeeded, mSelection="
"{ mOffset=%u, mLength=%u, mWritingMode=%s }",
this, mSelection.mOffset, mSelection.mLength,
GetWritingModeName(mSelection.mWritingMode).get()));
return true;
}
/******************************************************************************
* IMContextWrapper::Selection
******************************************************************************/
void
IMContextWrapper::Selection::Assign(const IMENotification& aIMENotification)
{
MOZ_ASSERT(aIMENotification.mMessage == NOTIFY_IME_OF_SELECTION_CHANGE);
mOffset = aIMENotification.mSelectionChangeData.mOffset;
mLength = aIMENotification.mSelectionChangeData.Length();
mWritingMode = aIMENotification.mSelectionChangeData.GetWritingMode();
}
void
IMContextWrapper::Selection::Assign(const WidgetQueryContentEvent& aEvent)
{
MOZ_ASSERT(aEvent.mMessage == eQuerySelectedText);
MOZ_ASSERT(aEvent.mSucceeded);
mOffset = aEvent.mReply.mOffset;
mLength = aEvent.mReply.mString.Length();
mWritingMode = aEvent.GetWritingMode();
}
} // namespace widget
} // namespace mozilla