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gecko-dev/widget/gtk/IMContextWrapper.cpp
Masayuki Nakano 1166607c92 Bug 1387357 - IMContextWrapper::DispatchCompositionStart() should stop dispatching eCompositionStart if dispatching preceding eKeyDown event causes changing active IM context r=m_kato 
If a keydown event handler moves focus like Ctrl+PageDown handler, IM context
may be changed to DISABLED or something.  In such case, native IME would stop
current composition because focus moving in Gecko causes making IME blurred.
However, IMContextWrapper::DispatchCompositionStart() always dispatches
eCompositionStart even in such case.

So, it should stop dispatching eCompositionStart if IME enabled state is
changed during dispatching the preceding keydown event.

Note that this patch moves the setter of mComposingContext from
OnStartCompositionNative() which is a signal listener of "preedit_start" to
DispatchCompositionStart() because if IME starts composition without
"preedit_start" signal, DispatchCompositionStart() will be called but
OnStartCompositionNative() isn't called.  However, this fix needs
mComposingContext.

MozReview-Commit-ID: F3F6NuCOrkJ

--HG--
extra : rebase_source : 513528eba0f29eb9b6ce8c5f47e4badbde9cbdb8
2017-09-04 20:18:43 +09:00

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/* -*- 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;
}
NS_IMETHODIMP_(IMENotificationRequests)
IMContextWrapper::GetIMENotificationRequests()
{
// While a plugin has focus, IMContextWrapper doesn't need any
// notifications.
if (mInputContext.mIMEState.mEnabled == IMEState::PLUGIN) {
return IMENotificationRequests();
}
IMENotificationRequests::Notifications notifications =
IMENotificationRequests::NOTIFY_NOTHING;
// If it's not enabled, we don't need position change notification.
if (IsEnabled()) {
notifications |= IMENotificationRequests::NOTIFY_POSITION_CHANGE;
}
return IMENotificationRequests(notifications);
}
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.
mSelectedStringRemovedByComposition.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 mSelectedStringRemovedByComposition?
// 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, mComposingContext=0x%p",
this, aContext, GetCurrentContext(), mComposingContext));
// 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;
}
if (mComposingContext && aContext != mComposingContext) {
// XXX For now, we should ignore this odd case, just logging.
MOZ_LOG(gGtkIMLog, LogLevel::Warning,
("0x%p OnStartCompositionNative(), Warning, "
"there is already a composing context but starting new "
"composition with different context",
this));
}
// IME may start composition without "preedit_start" signal. Therefore,
// mComposingContext will be initialized in DispatchCompositionStart().
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), mComposingContext=0x%p",
this, aContext, mComposingContext));
// 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;
}
// If we've not started composition with aContext, we should ignore it.
if (aContext != mComposingContext) {
MOZ_LOG(gGtkIMLog, LogLevel::Warning,
("0x%p OnEndCompositionNative(), Warning, "
"given context doesn't match with mComposingContext",
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), "
"mComposingContext=0x%p",
this, aContext, mComposingContext));
// 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;
}
if (mComposingContext && aContext != mComposingContext) {
// XXX For now, we should ignore this odd case, just logging.
MOZ_LOG(gGtkIMLog, LogLevel::Warning,
("0x%p OnChangeCompositionNative(), Warning, "
"given context doesn't match with composing context",
this));
}
nsAutoString compositionString;
GetCompositionString(aContext, compositionString);
if (!IsComposing() && compositionString.IsEmpty()) {
MOZ_LOG(gGtkIMLog, LogLevel::Warning,
("0x%p OnChangeCompositionNative(), Warning, does nothing "
"because has not started composition and composing string is "
"empty", this));
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]) {
MOZ_LOG(gGtkIMLog, LogLevel::Warning,
("0x%p OnCommitCompositionNative(), Warning, does nothing "
"because has not started composition and commit string is empty",
this));
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;
}
mComposingContext = static_cast<GtkIMContext*>(g_object_ref(aContext));
MOZ_ASSERT(mComposingContext);
// 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) {
// A keydown event handler may change focus with the following keydown
// event. In such case, we need to cancel this composition. So, we
// need to store IM context now because mComposingContext may be
// overwritten with different context if calling this method
// recursively.
// Note that we don't need to grab the context here because |context|
// will be used only for checking if it's same as mComposingContext.
GtkIMContext* context = mComposingContext;
// 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(), preceding keydown event is "
"dispatched",
this));
if (lastFocusedWindow->IsDestroyed() ||
lastFocusedWindow != mLastFocusedWindow) {
MOZ_LOG(gGtkIMLog, LogLevel::Warning,
("0x%p DispatchCompositionStart(), Warning, the focused "
"widget was destroyed/changed by keydown event",
this));
return false;
}
// If the dispatched keydown event caused moving focus and that also
// caused changing active context, we need to cancel composition here.
if (GetCurrentContext() != context) {
MOZ_LOG(gGtkIMLog, LogLevel::Warning,
("0x%p DispatchCompositionStart(), Warning, the preceding "
"keydown event causes changing active IM context",
this));
if (mComposingContext == context) {
// Only when the context is still composing, we should call
// ResetIME() here. Otherwise, it should've already been
// cleaned up.
ResetIME();
}
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(
&mSelectedStringRemovedByComposition))) {
// 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);
// Emulate selection until receiving actual selection range.
mSelection.CollapseTo(
mCompositionStart +
(aCommitString ? aCommitString->Length() :
mDispatchedCompositionString.Length()),
mSelection.mWritingMode);
mCompositionState = eCompositionState_NotComposing;
mCompositionStart = UINT32_MAX;
mCompositionTargetRange.Clear();
mDispatchedCompositionString.Truncate();
mSelectedStringRemovedByComposition.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=%ld)",
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, Length()=%u, mWritingMode=%s }",
this, aContext, mCompositionTargetRange.mOffset,
mCompositionTargetRange.mLength,
mSelection.mOffset, mSelection.Length(),
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 = mSelectedStringRemovedByComposition.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.Length();
}
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 != mSelectedStringRemovedByComposition) {
textContent.Replace(mCompositionStart,
mDispatchedCompositionString.Length(),
mSelectedStringRemovedByComposition);
}
// 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,
&mSelectedStringRemovedByComposition)) {
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: %ld)",
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: %ld, computed end offset: %ld)",
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()) {
if (aSelectedString) {
*aSelectedString = mSelection.mString;
}
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, Length()=%u, mWritingMode=%s }",
this, mSelection.mOffset, mSelection.Length(),
GetWritingModeName(mSelection.mWritingMode).get()));
return true;
}
/******************************************************************************
* IMContextWrapper::Selection
******************************************************************************/
void
IMContextWrapper::Selection::Assign(const IMENotification& aIMENotification)
{
MOZ_ASSERT(aIMENotification.mMessage == NOTIFY_IME_OF_SELECTION_CHANGE);
mString = aIMENotification.mSelectionChangeData.String();
mOffset = aIMENotification.mSelectionChangeData.mOffset;
mWritingMode = aIMENotification.mSelectionChangeData.GetWritingMode();
}
void
IMContextWrapper::Selection::Assign(const WidgetQueryContentEvent& aEvent)
{
MOZ_ASSERT(aEvent.mMessage == eQuerySelectedText);
MOZ_ASSERT(aEvent.mSucceeded);
mString = aEvent.mReply.mString.Length();
mOffset = aEvent.mReply.mOffset;
mWritingMode = aEvent.GetWritingMode();
}
} // namespace widget
} // namespace mozilla
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