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gecko/widget/gtk/nsGtkIMModule.cpp

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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 "prlog.h"
#include "prtime.h"
#include "nsGtkIMModule.h"
#include "nsWindow.h"
#include "mozilla/Likely.h"
#include "mozilla/MiscEvents.h"
#include "mozilla/Preferences.h"
#include "mozilla/TextEvents.h"
using namespace mozilla;
using namespace mozilla::widget;
#ifdef PR_LOGGING
PRLogModuleInfo* gGtkIMLog = nullptr;
static const char*
GetRangeTypeName(uint32_t aRangeType)
{
switch (aRangeType) {
case NS_TEXTRANGE_RAWINPUT:
return "NS_TEXTRANGE_RAWINPUT";
case NS_TEXTRANGE_CONVERTEDTEXT:
return "NS_TEXTRANGE_CONVERTEDTEXT";
case NS_TEXTRANGE_SELECTEDRAWTEXT:
return "NS_TEXTRANGE_SELECTEDRAWTEXT";
case NS_TEXTRANGE_SELECTEDCONVERTEDTEXT:
return "NS_TEXTRANGE_SELECTEDCONVERTEDTEXT";
case NS_TEXTRANGE_CARETPOSITION:
return "NS_TEXTRANGE_CARETPOSITION";
default:
return "UNKNOWN SELECTION TYPE!!";
}
}
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!!";
}
}
#endif
const static bool kUseSimpleContextDefault = MOZ_WIDGET_GTK == 2;
nsGtkIMModule* nsGtkIMModule::sLastFocusedModule = nullptr;
bool nsGtkIMModule::sUseSimpleContext;
nsGtkIMModule::nsGtkIMModule(nsWindow* aOwnerWindow)
: mOwnerWindow(aOwnerWindow)
, mLastFocusedWindow(nullptr)
, mContext(nullptr)
, mSimpleContext(nullptr)
, mDummyContext(nullptr)
, mComposingContext(nullptr)
, mCompositionStart(UINT32_MAX)
, mProcessingKeyEvent(nullptr)
, mCompositionTargetOffset(UINT32_MAX)
, mCompositionState(eCompositionState_NotComposing)
, mIsIMFocused(false)
{
#ifdef PR_LOGGING
if (!gGtkIMLog) {
gGtkIMLog = PR_NewLogModule("nsGtkIMModuleWidgets");
}
#endif
static bool sFirstInstance = true;
if (sFirstInstance) {
sFirstInstance = false;
sUseSimpleContext =
Preferences::GetBool(
"intl.ime.use_simple_context_on_password_field",
kUseSimpleContextDefault);
}
Init();
}
void
nsGtkIMModule::Init()
{
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
("GtkIMModule(%p): Init, mOwnerWindow=%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(nsGtkIMModule::OnChangeCompositionCallback),
this);
g_signal_connect(mContext, "retrieve_surrounding",
G_CALLBACK(nsGtkIMModule::OnRetrieveSurroundingCallback),
this);
g_signal_connect(mContext, "delete_surrounding",
G_CALLBACK(nsGtkIMModule::OnDeleteSurroundingCallback),
this);
g_signal_connect(mContext, "commit",
G_CALLBACK(nsGtkIMModule::OnCommitCompositionCallback),
this);
g_signal_connect(mContext, "preedit_start",
G_CALLBACK(nsGtkIMModule::OnStartCompositionCallback),
this);
g_signal_connect(mContext, "preedit_end",
G_CALLBACK(nsGtkIMModule::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(&nsGtkIMModule::OnChangeCompositionCallback),
this);
g_signal_connect(mSimpleContext, "retrieve_surrounding",
G_CALLBACK(&nsGtkIMModule::OnRetrieveSurroundingCallback),
this);
g_signal_connect(mSimpleContext, "delete_surrounding",
G_CALLBACK(&nsGtkIMModule::OnDeleteSurroundingCallback),
this);
g_signal_connect(mSimpleContext, "commit",
G_CALLBACK(&nsGtkIMModule::OnCommitCompositionCallback),
this);
g_signal_connect(mSimpleContext, "preedit_start",
G_CALLBACK(nsGtkIMModule::OnStartCompositionCallback),
this);
g_signal_connect(mSimpleContext, "preedit_end",
G_CALLBACK(nsGtkIMModule::OnEndCompositionCallback),
this);
}
// Dummy context
mDummyContext = gtk_im_multicontext_new();
gtk_im_context_set_client_window(mDummyContext, gdkWindow);
}
nsGtkIMModule::~nsGtkIMModule()
{
if (this == sLastFocusedModule) {
sLastFocusedModule = nullptr;
}
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
("GtkIMModule(%p) was gone", this));
}
void
nsGtkIMModule::OnDestroyWindow(nsWindow* aWindow)
{
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
("GtkIMModule(%p): OnDestroyWindow, aWindow=%p, mLastFocusedWindow=%p, mOwnerWindow=%p, mLastFocusedModule=%p",
this, aWindow, mLastFocusedWindow, mOwnerWindow, sLastFocusedModule));
NS_PRECONDITION(aWindow, "aWindow must not be null");
if (mLastFocusedWindow == aWindow) {
EndIMEComposition(aWindow);
if (mIsIMFocused) {
Blur();
}
mLastFocusedWindow = nullptr;
}
if (mOwnerWindow != aWindow) {
return;
}
if (sLastFocusedModule == this) {
sLastFocusedModule = 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;
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" SUCCEEDED, Completely destroyed"));
}
// 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
nsGtkIMModule::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
nsGtkIMModule::OnFocusWindow(nsWindow* aWindow)
{
if (MOZ_UNLIKELY(IsDestroyed())) {
return;
}
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
("GtkIMModule(%p): OnFocusWindow, aWindow=%p, mLastFocusedWindow=%p",
this, aWindow, mLastFocusedWindow));
mLastFocusedWindow = aWindow;
Focus();
}
void
nsGtkIMModule::OnBlurWindow(nsWindow* aWindow)
{
if (MOZ_UNLIKELY(IsDestroyed())) {
return;
}
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
("GtkIMModule(%p): OnBlurWindow, aWindow=%p, mLastFocusedWindow=%p, mIsIMFocused=%s",
this, aWindow, mLastFocusedWindow, mIsIMFocused ? "YES" : "NO"));
if (!mIsIMFocused || mLastFocusedWindow != aWindow) {
return;
}
Blur();
}
bool
nsGtkIMModule::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;
}
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
("GtkIMModule(%p): OnKeyEvent, aCaller=%p, aKeyDownEventWasSent=%s",
this, aCaller, aKeyDownEventWasSent ? "TRUE" : "FALSE"));
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" aEvent: type=%s, keyval=%s, unicode=0x%X",
aEvent->type == GDK_KEY_PRESS ? "GDK_KEY_PRESS" :
aEvent->type == GDK_KEY_RELEASE ? "GDK_KEY_RELEASE" : "Unknown",
gdk_keyval_name(aEvent->keyval),
gdk_keyval_to_unicode(aEvent->keyval)));
if (aCaller != mLastFocusedWindow) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, the caller isn't focused window, mLastFocusedWindow=%p",
mLastFocusedWindow));
return false;
}
GtkIMContext* activeContext = GetActiveContext();
if (MOZ_UNLIKELY(!activeContext)) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, there are no context"));
return false;
}
mKeyDownEventWasSent = aKeyDownEventWasSent;
mFilterKeyEvent = true;
mProcessingKeyEvent = aEvent;
gboolean isFiltered =
gtk_im_context_filter_keypress(activeContext, 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 (IsComposing() && !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(activeContext, &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;
}
}
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" filterThisEvent=%s (isFiltered=%s, mFilterKeyEvent=%s)",
filterThisEvent ? "TRUE" : "FALSE", isFiltered ? "YES" : "NO",
mFilterKeyEvent ? "YES" : "NO"));
return filterThisEvent;
}
void
nsGtkIMModule::OnFocusChangeInGecko(bool aFocus)
{
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
("GtkIMModule(%p): OnFocusChangeInGecko, aFocus=%s, "
"mCompositionState=%s, mIsIMFocused=%s",
this, aFocus ? "YES" : "NO", GetCompositionStateName(),
mIsIMFocused ? "YES" : "NO"));
// We shouldn't carry over the removed string to another editor.
mSelectedString.Truncate();
}
void
nsGtkIMModule::ResetIME()
{
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
("GtkIMModule(%p): ResetIME, mCompositionState=%s, mIsIMFocused=%s",
this, GetCompositionStateName(), mIsIMFocused ? "YES" : "NO"));
GtkIMContext* activeContext = GetActiveContext();
if (MOZ_UNLIKELY(!activeContext)) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, there are no context"));
return;
}
gtk_im_context_reset(activeContext);
}
nsresult
nsGtkIMModule::EndIMEComposition(nsWindow* aCaller)
{
if (MOZ_UNLIKELY(IsDestroyed())) {
return NS_OK;
}
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
("GtkIMModule(%p): EndIMEComposition, aCaller=%p, "
"mCompositionState=%s",
this, aCaller, GetCompositionStateName()));
if (aCaller != mLastFocusedWindow) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" WARNING: the caller isn't focused window, mLastFocusedWindow=%p",
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
nsGtkIMModule::OnUpdateComposition()
{
if (MOZ_UNLIKELY(IsDestroyed())) {
return;
}
SetCursorPosition(GetActiveContext(), mCompositionTargetOffset);
}
void
nsGtkIMModule::SetInputContext(nsWindow* aCaller,
const InputContext* aContext,
const InputContextAction* aAction)
{
if (MOZ_UNLIKELY(IsDestroyed())) {
return;
}
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
("GtkIMModule(%p): SetInputContext, aCaller=%p, aState=%s mHTMLInputType=%s",
this, aCaller, GetEnabledStateName(aContext->mIMEState.mEnabled),
NS_ConvertUTF16toUTF8(aContext->mHTMLInputType).get()));
if (aCaller != mLastFocusedWindow) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, the caller isn't focused window, mLastFocusedWindow=%p",
mLastFocusedWindow));
return;
}
if (!mContext) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, there are no context"));
return;
}
if (sLastFocusedModule != this) {
mInputContext = *aContext;
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" SUCCEEDED, but we're not active"));
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
nsGtkIMModule::GetInputContext()
{
mInputContext.mIMEState.mOpen = IMEState::OPEN_STATE_NOT_SUPPORTED;
return mInputContext;
}
GtkIMContext*
nsGtkIMModule::GetCurrentContext() const
{
if (IsEnabled()) {
return mContext;
}
if (mInputContext.mIMEState.mEnabled == IMEState::PASSWORD) {
return mSimpleContext;
}
return mDummyContext;
}
bool
nsGtkIMModule::IsValidContext(GtkIMContext* aContext) const
{
if (!aContext) {
return false;
}
return aContext == mContext ||
aContext == mSimpleContext ||
aContext == mDummyContext;
}
bool
nsGtkIMModule::IsEnabled() const
{
return mInputContext.mIMEState.mEnabled == IMEState::ENABLED ||
mInputContext.mIMEState.mEnabled == IMEState::PLUGIN ||
(!sUseSimpleContext &&
mInputContext.mIMEState.mEnabled == IMEState::PASSWORD);
}
void
nsGtkIMModule::Focus()
{
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
("GtkIMModule(%p): Focus, sLastFocusedModule=%p",
this, sLastFocusedModule));
if (mIsIMFocused) {
NS_ASSERTION(sLastFocusedModule == this,
"We're not active, but the IM was focused?");
return;
}
GtkIMContext* currentContext = GetCurrentContext();
if (!currentContext) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, there are no context"));
return;
}
if (sLastFocusedModule && sLastFocusedModule != this) {
sLastFocusedModule->Blur();
}
sLastFocusedModule = this;
gtk_im_context_focus_in(currentContext);
mIsIMFocused = 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
nsGtkIMModule::Blur()
{
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
("GtkIMModule(%p): Blur, mIsIMFocused=%s",
this, mIsIMFocused ? "YES" : "NO"));
if (!mIsIMFocused) {
return;
}
GtkIMContext* currentContext = GetCurrentContext();
if (!currentContext) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, there are no context"));
return;
}
gtk_im_context_focus_out(currentContext);
mIsIMFocused = false;
}
void
nsGtkIMModule::OnSelectionChange(nsWindow* aCaller)
{
if (MOZ_UNLIKELY(IsDestroyed())) {
return;
}
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
("GtkIMModule(%p): OnSelectionChange(aCaller=0x%p), "
"mCompositionState=%s",
this, aCaller, GetCompositionStateName()));
if (aCaller != mLastFocusedWindow) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" WARNING: the caller isn't focused window, "
"mLastFocusedWindow=%p",
mLastFocusedWindow));
return;
}
ResetIME();
}
/* static */
void
nsGtkIMModule::OnStartCompositionCallback(GtkIMContext *aContext,
nsGtkIMModule* aModule)
{
aModule->OnStartCompositionNative(aContext);
}
void
nsGtkIMModule::OnStartCompositionNative(GtkIMContext *aContext)
{
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
("GtkIMModule(%p): OnStartCompositionNative, aContext=%p, "
"current context=%p",
this, aContext, GetCurrentContext()));
// See bug 472635, we should do nothing if IM context doesn't match.
if (GetCurrentContext() != aContext) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, given context doesn't match"));
return;
}
mComposingContext = static_cast<GtkIMContext*>(g_object_ref(aContext));
if (!DispatchCompositionStart(aContext)) {
return;
}
mCompositionTargetOffset = mCompositionStart;
}
/* static */
void
nsGtkIMModule::OnEndCompositionCallback(GtkIMContext *aContext,
nsGtkIMModule* aModule)
{
aModule->OnEndCompositionNative(aContext);
}
void
nsGtkIMModule::OnEndCompositionNative(GtkIMContext *aContext)
{
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
("GtkIMModule(%p): OnEndCompositionNative, aContext=%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)) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, given context doesn't match with any context"));
return;
}
g_object_unref(mComposingContext);
mComposingContext = nullptr;
if (!IsComposing()) {
// If we already handled the commit event, we should do nothing here.
return;
}
// Be aware, widget can be gone
DispatchCompositionCommitEvent(aContext);
}
/* static */
void
nsGtkIMModule::OnChangeCompositionCallback(GtkIMContext *aContext,
nsGtkIMModule* aModule)
{
aModule->OnChangeCompositionNative(aContext);
}
void
nsGtkIMModule::OnChangeCompositionNative(GtkIMContext *aContext)
{
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
("GtkIMModule(%p): OnChangeCompositionNative, aContext=%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)) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, given context doesn't match with any context"));
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
nsGtkIMModule::OnRetrieveSurroundingCallback(GtkIMContext *aContext,
nsGtkIMModule *aModule)
{
return aModule->OnRetrieveSurroundingNative(aContext);
}
gboolean
nsGtkIMModule::OnRetrieveSurroundingNative(GtkIMContext *aContext)
{
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
("GtkIMModule(%p): OnRetrieveSurroundingNative, aContext=%p, "
"current context=%p",
this, aContext, GetCurrentContext()));
// See bug 472635, we should do nothing if IM context doesn't match.
if (GetCurrentContext() != aContext) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, given context doesn't match"));
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);
return TRUE;
}
/* static */
gboolean
nsGtkIMModule::OnDeleteSurroundingCallback(GtkIMContext *aContext,
gint aOffset,
gint aNChars,
nsGtkIMModule *aModule)
{
return aModule->OnDeleteSurroundingNative(aContext, aOffset, aNChars);
}
gboolean
nsGtkIMModule::OnDeleteSurroundingNative(GtkIMContext *aContext,
gint aOffset,
gint aNChars)
{
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
("GtkIMModule(%p): OnDeleteSurroundingNative, aContext=%p, "
"current context=%p",
this, aContext, GetCurrentContext()));
// See bug 472635, we should do nothing if IM context doesn't match.
if (GetCurrentContext() != aContext) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, given context doesn't match"));
return FALSE;
}
if (NS_SUCCEEDED(DeleteText(aContext, aOffset, (uint32_t)aNChars))) {
return TRUE;
}
// failed
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, cannot delete text"));
return FALSE;
}
/* static */
void
nsGtkIMModule::OnCommitCompositionCallback(GtkIMContext *aContext,
const gchar *aString,
nsGtkIMModule* aModule)
{
aModule->OnCommitCompositionNative(aContext, aString);
}
void
nsGtkIMModule::OnCommitCompositionNative(GtkIMContext *aContext,
const gchar *aUTF8Char)
{
const gchar emptyStr = 0;
const gchar *commitString = aUTF8Char ? aUTF8Char : &emptyStr;
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
("GtkIMModule(%p): OnCommitCompositionNative, aContext=%p, "
"current context=%p, commitString=\"%s\"",
this, aContext, GetCurrentContext(), commitString));
// See bug 472635, we should do nothing if IM context doesn't match.
if (GetCurrentContext() != aContext) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, given context doesn't match"));
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 (!IsComposing() && !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.
if (!IsComposing() && mProcessingKeyEvent) {
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)) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
("GtkIMModule(%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
nsGtkIMModule::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();
}
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
("GtkIMModule(%p): GetCompositionString, result=\"%s\"",
this, preedit_string));
pango_attr_list_unref(feedback_list);
g_free(preedit_string);
}
bool
nsGtkIMModule::DispatchCompositionStart(GtkIMContext* aContext)
{
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
("GtkIMModule(%p): DispatchCompositionStart, aContext=%p",
this, aContext));
if (IsComposing()) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" WARNING, we're already in composition"));
return true;
}
if (!mLastFocusedWindow) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, there are no focused window in this module"));
return false;
}
nsEventStatus status;
WidgetQueryContentEvent selection(true, NS_QUERY_SELECTED_TEXT,
mLastFocusedWindow);
InitEvent(selection);
mLastFocusedWindow->DispatchEvent(&selection, status);
if (!selection.mSucceeded || selection.mReply.mOffset == UINT32_MAX) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, cannot query the selection offset"));
return false;
}
// 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 = selection.mReply.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).
nsCOMPtr<nsIWidget> kungFuDeathGrip = mLastFocusedWindow;
bool isCancelled;
mLastFocusedWindow->DispatchKeyDownEvent(mProcessingKeyEvent,
&isCancelled);
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" keydown event is dispatched"));
if (static_cast<nsWindow*>(kungFuDeathGrip.get())->IsDestroyed() ||
kungFuDeathGrip != mLastFocusedWindow) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" NOTE, the focused widget was destroyed/changed by keydown event"));
return false;
}
}
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" mCompositionStart=%u", mCompositionStart));
mCompositionState = eCompositionState_CompositionStartDispatched;
WidgetCompositionEvent compEvent(true, NS_COMPOSITION_START,
mLastFocusedWindow);
InitEvent(compEvent);
nsCOMPtr<nsIWidget> kungFuDeathGrip = mLastFocusedWindow;
mLastFocusedWindow->DispatchEvent(&compEvent, status);
if (static_cast<nsWindow*>(kungFuDeathGrip.get())->IsDestroyed() ||
kungFuDeathGrip != mLastFocusedWindow) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" NOTE, the focused widget was destroyed/changed by compositionstart event"));
return false;
}
return true;
}
bool
nsGtkIMModule::DispatchCompositionChangeEvent(
GtkIMContext* aContext,
const nsAString& aCompositionString)
{
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
("GtkIMModule(%p): DispatchCompositionChangeEvent, aContext=%p",
this, aContext));
if (!mLastFocusedWindow) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, there are no focused window in this module"));
return false;
}
if (!IsComposing()) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" The composition wasn't started, force starting..."));
nsCOMPtr<nsIWidget> kungFuDeathGrip = mLastFocusedWindow;
if (!DispatchCompositionStart(aContext)) {
return false;
}
}
nsEventStatus status;
nsRefPtr<nsWindow> lastFocusedWindow = mLastFocusedWindow;
// Store the selected string which will be removed by following
// compositionchange event.
if (mCompositionState == eCompositionState_CompositionStartDispatched) {
// XXX We should assume, for now, any web applications don't change
// selection at handling this compositionchange event.
WidgetQueryContentEvent querySelectedTextEvent(true,
NS_QUERY_SELECTED_TEXT,
mLastFocusedWindow);
mLastFocusedWindow->DispatchEvent(&querySelectedTextEvent, status);
if (querySelectedTextEvent.mSucceeded) {
mSelectedString = querySelectedTextEvent.mReply.mString;
mCompositionStart = querySelectedTextEvent.mReply.mOffset;
}
}
WidgetCompositionEvent compositionChangeEvent(true, NS_COMPOSITION_CHANGE,
mLastFocusedWindow);
InitEvent(compositionChangeEvent);
uint32_t targetOffset = mCompositionStart;
compositionChangeEvent.mData =
mDispatchedCompositionString = aCompositionString;
compositionChangeEvent.mRanges =
CreateTextRangeArray(aContext, mDispatchedCompositionString);
targetOffset += compositionChangeEvent.mRanges->TargetClauseOffset();
mCompositionState = eCompositionState_CompositionChangeEventDispatched;
mLastFocusedWindow->DispatchEvent(&compositionChangeEvent, status);
if (lastFocusedWindow->IsDestroyed() ||
lastFocusedWindow != mLastFocusedWindow) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" NOTE, the focused widget was destroyed/changed by "
"compositionchange event"));
return false;
}
// We cannot call SetCursorPosition for e10s-aware.
// DispatchEvent is async on e10s, so composition rect isn't updated now
// on tab parent.
mCompositionTargetOffset = targetOffset;
return true;
}
bool
nsGtkIMModule::DispatchCompositionCommitEvent(
GtkIMContext* aContext,
const nsAString* aCommitString)
{
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
("GtkIMModule(%p): DispatchCompositionCommitEvent, aContext=%p, "
"aCommitString=%p, (\"%s\")",
this, aContext, aCommitString,
aCommitString ? NS_ConvertUTF16toUTF8(*aCommitString).get() : ""));
if (!mLastFocusedWindow) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, there are no focused window in this module"));
return false;
}
if (!IsComposing()) {
if (!aCommitString || aCommitString->IsEmpty()) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, there is no composition and empty commit "
"string"));
return true;
}
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" The composition wasn't started, force starting..."));
nsCOMPtr<nsIWidget> kungFuDeathGrip(mLastFocusedWindow);
if (!DispatchCompositionStart(aContext)) {
return false;
}
}
nsRefPtr<nsWindow> lastFocusedWindow(mLastFocusedWindow);
uint32_t message = aCommitString ? NS_COMPOSITION_COMMIT :
NS_COMPOSITION_COMMIT_AS_IS;
mCompositionState = eCompositionState_NotComposing;
mCompositionStart = UINT32_MAX;
mCompositionTargetOffset = UINT32_MAX;
mDispatchedCompositionString.Truncate();
WidgetCompositionEvent compositionCommitEvent(true, message,
mLastFocusedWindow);
InitEvent(compositionCommitEvent);
if (message == NS_COMPOSITION_COMMIT) {
compositionCommitEvent.mData = *aCommitString;
}
nsEventStatus status = nsEventStatus_eIgnore;
mLastFocusedWindow->DispatchEvent(&compositionCommitEvent, status);
if (lastFocusedWindow->IsDestroyed() ||
lastFocusedWindow != mLastFocusedWindow) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" NOTE, the focused widget was destroyed/changed by "
"compositioncommit event"));
return false;
}
return true;
}
already_AddRefed<TextRangeArray>
nsGtkIMModule::CreateTextRangeArray(GtkIMContext* aContext,
const nsAString& aLastDispatchedData)
{
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
("GtkIMModule(%p): CreateTextRangeArray, aContext=%p, "
"aLastDispatchedData=\"%s\" (length=%u)",
this, aContext, NS_ConvertUTF16toUTF8(aLastDispatchedData).get(),
aLastDispatchedData.Length()));
nsRefPtr<TextRangeArray> textRangeArray = new TextRangeArray();
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) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" preedit_string is null"));
pango_attr_list_unref(feedback_list);
g_free(preedit_string);
return textRangeArray.forget();
}
PangoAttrIterator* iter;
iter = pango_attr_list_get_iterator(feedback_list);
if (!iter) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, iterator couldn't be allocated"));
pango_attr_list_unref(feedback_list);
g_free(preedit_string);
return textRangeArray.forget();
}
/*
* Depend on gtk2's implementation on XIM support.
* In aFeedback got from gtk2, there are only three types of data:
* PANGO_ATTR_UNDERLINE, PANGO_ATTR_FOREGROUND, PANGO_ATTR_BACKGROUND.
* Corresponding to XIMUnderline, XIMReverse.
* Don't take PANGO_ATTR_BACKGROUND into account, since
* PANGO_ATTR_BACKGROUND and PANGO_ATTR_FOREGROUND are always
* a couple.
*/
do {
PangoAttribute* attrUnderline =
pango_attr_iterator_get(iter, PANGO_ATTR_UNDERLINE);
PangoAttribute* attrForeground =
pango_attr_iterator_get(iter, PANGO_ATTR_FOREGROUND);
if (!attrUnderline && !attrForeground) {
continue;
}
// Get the range of the current attribute(s)
gint start, end;
pango_attr_iterator_range(iter, &start, &end);
TextRange range;
// XIMReverse | XIMUnderline
if (attrUnderline && attrForeground) {
range.mRangeType = NS_TEXTRANGE_SELECTEDCONVERTEDTEXT;
}
// XIMUnderline
else if (attrUnderline) {
range.mRangeType = NS_TEXTRANGE_CONVERTEDTEXT;
}
// XIMReverse
else if (attrForeground) {
range.mRangeType = NS_TEXTRANGE_SELECTEDRAWTEXT;
} else {
range.mRangeType = NS_TEXTRANGE_RAWINPUT;
}
gunichar2* uniStr = nullptr;
if (start == 0) {
range.mStartOffset = 0;
} else {
glong uniStrLen;
uniStr = g_utf8_to_utf16(preedit_string, start,
nullptr, &uniStrLen, nullptr);
if (uniStr) {
range.mStartOffset = uniStrLen;
g_free(uniStr);
uniStr = nullptr;
}
}
glong uniStrLen;
uniStr = g_utf8_to_utf16(preedit_string + start, end - start,
nullptr, &uniStrLen, nullptr);
if (!uniStr) {
range.mEndOffset = range.mStartOffset;
} else {
range.mEndOffset = range.mStartOffset + uniStrLen;
g_free(uniStr);
uniStr = nullptr;
}
textRangeArray->AppendElement(range);
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" mStartOffset=%u, mEndOffset=%u, mRangeType=%s",
range.mStartOffset, range.mEndOffset,
GetRangeTypeName(range.mRangeType)));
} while (pango_attr_iterator_next(iter));
TextRange range;
if (cursor_pos < 0) {
range.mStartOffset = 0;
} else if (uint32_t(cursor_pos) > aLastDispatchedData.Length()) {
range.mStartOffset = aLastDispatchedData.Length();
} else {
range.mStartOffset = uint32_t(cursor_pos);
}
range.mEndOffset = range.mStartOffset;
range.mRangeType = NS_TEXTRANGE_CARETPOSITION;
textRangeArray->AppendElement(range);
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" mStartOffset=%u, mEndOffset=%u, mRangeType=%s",
range.mStartOffset, range.mEndOffset,
GetRangeTypeName(range.mRangeType)));
pango_attr_iterator_destroy(iter);
pango_attr_list_unref(feedback_list);
g_free(preedit_string);
return textRangeArray.forget();
}
void
nsGtkIMModule::SetCursorPosition(GtkIMContext* aContext,
uint32_t aTargetOffset)
{
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
("GtkIMModule(%p): SetCursorPosition, aContext=%p, aTargetOffset=%u",
this, aContext, aTargetOffset));
if (aTargetOffset == UINT32_MAX) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, aTargetOffset is wrong offset"));
return;
}
if (!mLastFocusedWindow) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, there are no focused window"));
return;
}
if (MOZ_UNLIKELY(!aContext)) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, there are no context"));
return;
}
WidgetQueryContentEvent charRect(true, NS_QUERY_TEXT_RECT,
mLastFocusedWindow);
charRect.InitForQueryTextRect(aTargetOffset, 1);
InitEvent(charRect);
nsEventStatus status;
mLastFocusedWindow->DispatchEvent(&charRect, status);
if (!charRect.mSucceeded) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, NS_QUERY_TEXT_RECT was failed"));
return;
}
nsWindow* rootWindow =
static_cast<nsWindow*>(mLastFocusedWindow->GetTopLevelWidget());
// Get the position of the rootWindow in screen.
gint rootX, rootY;
gdk_window_get_origin(rootWindow->GetGdkWindow(), &rootX, &rootY);
// Get the position of IM context owner window in screen.
gint ownerX, ownerY;
gdk_window_get_origin(mOwnerWindow->GetGdkWindow(), &ownerX, &ownerY);
// Compute the caret position in the IM owner window.
GdkRectangle area;
area.x = charRect.mReply.mRect.x + rootX - ownerX;
area.y = charRect.mReply.mRect.y + rootY - ownerY;
area.width = 0;
area.height = charRect.mReply.mRect.height;
gtk_im_context_set_cursor_location(aContext, &area);
}
nsresult
nsGtkIMModule::GetCurrentParagraph(nsAString& aText, uint32_t& aCursorPos)
{
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
("GtkIMModule(%p): GetCurrentParagraph, mCompositionState=%s",
this, GetCompositionStateName()));
if (!mLastFocusedWindow) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, there are no focused window in this module"));
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
WidgetQueryContentEvent querySelectedTextEvent(true,
NS_QUERY_SELECTED_TEXT,
mLastFocusedWindow);
mLastFocusedWindow->DispatchEvent(&querySelectedTextEvent, status);
NS_ENSURE_TRUE(querySelectedTextEvent.mSucceeded, NS_ERROR_FAILURE);
selOffset = querySelectedTextEvent.mReply.mOffset;
selLength = querySelectedTextEvent.mReply.mString.Length();
}
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" selOffset=%u, selLength=%u",
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) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, The selection is out of range"));
return NS_ERROR_FAILURE;
}
// Get all text contents of the focused editor
WidgetQueryContentEvent queryTextContentEvent(true,
NS_QUERY_TEXT_CONTENT,
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()) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, The selection is invalid, textContent.Length()=%u",
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);
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" aText=%s, aText.Length()=%u, aCursorPos=%u",
NS_ConvertUTF16toUTF8(aText).get(),
aText.Length(), aCursorPos));
return NS_OK;
}
nsresult
nsGtkIMModule::DeleteText(GtkIMContext* aContext,
int32_t aOffset,
uint32_t aNChars)
{
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
("GtkIMModule(%p): DeleteText, aContext=%p, aOffset=%d, aNChars=%d, "
"mCompositionState=%s",
this, aContext, aOffset, aNChars, GetCompositionStateName()));
if (!mLastFocusedWindow) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, there are no focused window in this module"));
return NS_ERROR_NULL_POINTER;
}
if (!aNChars) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, aNChars must not be zero"));
return NS_ERROR_INVALID_ARG;
}
nsRefPtr<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)) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, quitting from DeletText"));
return NS_ERROR_FAILURE;
}
} else {
// Query cursor position & selection
WidgetQueryContentEvent querySelectedTextEvent(true,
NS_QUERY_SELECTED_TEXT,
mLastFocusedWindow);
lastFocusedWindow->DispatchEvent(&querySelectedTextEvent, status);
NS_ENSURE_TRUE(querySelectedTextEvent.mSucceeded, NS_ERROR_FAILURE);
selOffset = querySelectedTextEvent.mReply.mOffset;
}
// Get all text contents of the focused editor
WidgetQueryContentEvent queryTextContentEvent(true,
NS_QUERY_TEXT_CONTENT,
mLastFocusedWindow);
queryTextContentEvent.InitForQueryTextContent(0, UINT32_MAX);
mLastFocusedWindow->DispatchEvent(&queryTextContentEvent, status);
NS_ENSURE_TRUE(queryTextContentEvent.mSucceeded, NS_ERROR_FAILURE);
if (queryTextContentEvent.mReply.mString.IsEmpty()) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, there is no contents"));
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) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, aOffset is too small for current cursor pos "
"(computed offset: %d)",
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) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, aNChars is too large for current contents "
"(content length: %d, computed end offset: %d)",
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, NS_SELECTION_SET,
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()) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, setting selection caused focus change "
"or window destroyed"));
return NS_ERROR_FAILURE;
}
// Delete the selection
WidgetContentCommandEvent contentCommandEvent(true,
NS_CONTENT_COMMAND_DELETE,
mLastFocusedWindow);
mLastFocusedWindow->DispatchEvent(&contentCommandEvent, status);
if (!contentCommandEvent.mSucceeded ||
lastFocusedWindow != mLastFocusedWindow ||
lastFocusedWindow->Destroyed()) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, deleting the selection caused focus change "
"or window destroyed"));
return NS_ERROR_FAILURE;
}
if (!wasComposing) {
return NS_OK;
}
// Restore the composition at new caret position.
if (!DispatchCompositionStart(aContext)) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, resterting composition start"));
return NS_ERROR_FAILURE;
}
if (!editorHadCompositionString) {
return NS_OK;
}
nsAutoString compositionString;
GetCompositionString(aContext, compositionString);
if (!DispatchCompositionChangeEvent(aContext, compositionString)) {
PR_LOG(gGtkIMLog, PR_LOG_ALWAYS,
(" FAILED, restoring composition string"));
return NS_ERROR_FAILURE;
}
return NS_OK;
}
void
nsGtkIMModule::InitEvent(WidgetGUIEvent& aEvent)
{
aEvent.time = PR_Now() / 1000;
}
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