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gecko-dev/widget/gtk/IMContextWrapper.cpp
Masayuki Nakano 0dfc1d00f9 Bug 1810406 - Handle asynchronous composition without synthesized GDK_KEY_PRESS event r=m_kato 
IME for ibus may send composition after filtering `GDK_KEY_PRESS` event
asynchronously.  In that case, IME or ibus usually synthesize `GDK_KEY_PRESS`
again for letting the application know what's being handled.  However, according
to the bug report, IME may send composition without synthesizing the
`GDK_KEY_PRESS` event.

Without this patch, `IMContextWrapper` dispatches only
`eContentCommandInsertText` event.  Then, it'll cause only a set of
`beforeinput` and `input` events.  Therefore, web apps may fail to do something
if they listen only composition and keyboard events only in Gecko.  For avoiding
Gecko only failure in this case, we should make `IMContentWrapper` handle the
composition with `GDK_KEY_PRESS` event in the queue which it has not handled
yet.  Then, web apps can work with `keydown` events whose `key` is `"Process"`.

Differential Revision: https://phabricator.services.mozilla.com/D170031
2023-02-21 22:51:43 +00:00

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=4 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/Logging.h"
#include "nsString.h"
#include "prtime.h"
#include "prenv.h"
#include "IMContextWrapper.h"
#include "nsGtkKeyUtils.h"
#include "nsWindow.h"
#include "mozilla/AutoRestore.h"
#include "mozilla/Likely.h"
#include "mozilla/LookAndFeel.h"
#include "mozilla/MiscEvents.h"
#include "mozilla/Preferences.h"
#include "mozilla/StaticPrefs_intl.h"
#include "mozilla/Telemetry.h"
#include "mozilla/TextEventDispatcher.h"
#include "mozilla/TextEvents.h"
#include "mozilla/ToString.h"
#include "mozilla/WritingModes.h"
// For collecting other people's log, tell `MOZ_LOG=IMEHandler:4,sync`
// rather than `MOZ_LOG=IMEHandler:5,sync` since using `5` may create too
// big file.
// Therefore you shouldn't use `LogLevel::Verbose` for logging usual behavior.
mozilla::LazyLogModule gIMELog("IMEHandler");
namespace mozilla {
namespace widget {
static inline const char* ToChar(bool aBool) {
return aBool ? "true" : "false";
}
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 GetEventStateName : public nsAutoCString {
public:
explicit GetEventStateName(guint aState,
IMContextWrapper::IMContextID aIMContextID =
IMContextWrapper::IMContextID::Unknown) {
if (aState & GDK_SHIFT_MASK) {
AppendModifier("shift");
}
if (aState & GDK_CONTROL_MASK) {
AppendModifier("control");
}
if (aState & GDK_MOD1_MASK) {
AppendModifier("mod1");
}
if (aState & GDK_MOD2_MASK) {
AppendModifier("mod2");
}
if (aState & GDK_MOD3_MASK) {
AppendModifier("mod3");
}
if (aState & GDK_MOD4_MASK) {
AppendModifier("mod4");
}
if (aState & GDK_MOD4_MASK) {
AppendModifier("mod5");
}
if (aState & GDK_MOD4_MASK) {
AppendModifier("mod5");
}
switch (aIMContextID) {
case IMContextWrapper::IMContextID::IBus:
static const guint IBUS_HANDLED_MASK = 1 << 24;
static const guint IBUS_IGNORED_MASK = 1 << 25;
if (aState & IBUS_HANDLED_MASK) {
AppendModifier("IBUS_HANDLED_MASK");
}
if (aState & IBUS_IGNORED_MASK) {
AppendModifier("IBUS_IGNORED_MASK");
}
break;
case IMContextWrapper::IMContextID::Fcitx:
case IMContextWrapper::IMContextID::Fcitx5:
static const guint FcitxKeyState_HandledMask = 1 << 24;
static const guint FcitxKeyState_IgnoredMask = 1 << 25;
if (aState & FcitxKeyState_HandledMask) {
AppendModifier("FcitxKeyState_HandledMask");
}
if (aState & FcitxKeyState_IgnoredMask) {
AppendModifier("FcitxKeyState_IgnoredMask");
}
break;
default:
break;
}
}
private:
void AppendModifier(const char* aModifierName) {
if (!IsEmpty()) {
AppendLiteral(" + ");
}
Append(aModifierName);
}
};
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(TextRangeStyle::LineStyle 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)",
static_cast<TextRangeStyle::LineStyleType>(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() = default;
};
const static bool kUseSimpleContextDefault = false;
/******************************************************************************
* SelectionStyleProvider
*
* IME (e.g., fcitx, ~4.2.8.3) may look up selection colors of widget, which
* is related to the window associated with the IM context, to support any
* colored widgets. Our editor (like <input type="text">) is rendered as
* native GtkTextView as far as possible by default and if editor color is
* changed by web apps, nsTextFrame may swap background color of foreground
* color of composition string for making composition string is always
* visually distinct in normal text.
*
* So, we would like IME to set style of composition string to good colors
* in GtkTextView. Therefore, this class overwrites selection colors of
* our widget with selection colors of GtkTextView so that it's possible IME
* to refer selection colors of GtkTextView via our widget.
******************************************************************************/
static Maybe<nscolor> GetSystemColor(LookAndFeel::ColorID aId) {
return LookAndFeel::GetColor(aId, LookAndFeel::ColorScheme::Light,
LookAndFeel::UseStandins::No);
}
class SelectionStyleProvider final {
public:
static SelectionStyleProvider* GetExistingInstance() { return sInstance; }
static SelectionStyleProvider* GetInstance() {
if (sHasShutDown) {
return nullptr;
}
if (!sInstance) {
sInstance = new SelectionStyleProvider();
}
return sInstance;
}
static void Shutdown() {
if (sInstance) {
g_object_unref(sInstance->mProvider);
}
delete sInstance;
sInstance = nullptr;
sHasShutDown = true;
}
// aGDKWindow is a GTK window which will be associated with an IM context.
void AttachTo(GdkWindow* aGDKWindow) {
GtkWidget* widget = nullptr;
// gdk_window_get_user_data() typically returns pointer to widget that
// window belongs to. If it's widget, fcitx retrieves selection colors
// of them. So, we need to overwrite its style.
gdk_window_get_user_data(aGDKWindow, (gpointer*)&widget);
if (GTK_IS_WIDGET(widget)) {
gtk_style_context_add_provider(gtk_widget_get_style_context(widget),
GTK_STYLE_PROVIDER(mProvider),
GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
}
}
void OnThemeChanged() {
// fcitx refers GtkStyle::text[GTK_STATE_SELECTED] and
// GtkStyle::bg[GTK_STATE_SELECTED] (although pair of text and *base*
// or *fg* and bg is correct). gtk_style_update_from_context() will
// set these colors using the widget's GtkStyleContext and so the
// colors can be controlled by a ":selected" CSS rule.
nsAutoCString style(":selected{");
// FYI: LookAndFeel always returns selection colors of GtkTextView.
if (auto selectionForegroundColor =
GetSystemColor(LookAndFeel::ColorID::Highlight)) {
double alpha =
static_cast<double>(NS_GET_A(*selectionForegroundColor)) / 0xFF;
style.AppendPrintf("color:rgba(%u,%u,%u,",
NS_GET_R(*selectionForegroundColor),
NS_GET_G(*selectionForegroundColor),
NS_GET_B(*selectionForegroundColor));
// We can't use AppendPrintf here, because it does locale-specific
// formatting of floating-point values.
style.AppendFloat(alpha);
style.AppendPrintf(");");
}
if (auto selectionBackgroundColor =
GetSystemColor(LookAndFeel::ColorID::Highlighttext)) {
double alpha =
static_cast<double>(NS_GET_A(*selectionBackgroundColor)) / 0xFF;
style.AppendPrintf("background-color:rgba(%u,%u,%u,",
NS_GET_R(*selectionBackgroundColor),
NS_GET_G(*selectionBackgroundColor),
NS_GET_B(*selectionBackgroundColor));
style.AppendFloat(alpha);
style.AppendPrintf(");");
}
style.AppendLiteral("}");
gtk_css_provider_load_from_data(mProvider, style.get(), -1, nullptr);
}
private:
static SelectionStyleProvider* sInstance;
static bool sHasShutDown;
GtkCssProvider* const mProvider;
SelectionStyleProvider() : mProvider(gtk_css_provider_new()) {
OnThemeChanged();
}
};
SelectionStyleProvider* SelectionStyleProvider::sInstance = nullptr;
bool SelectionStyleProvider::sHasShutDown = false;
/******************************************************************************
* IMContextWrapper
******************************************************************************/
IMContextWrapper* IMContextWrapper::sLastFocusedContext = nullptr;
guint16 IMContextWrapper::sWaitingSynthesizedKeyPressHardwareKeyCode = 0;
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),
mIMContextID(IMContextID::Unknown),
mFallbackToKeyEvent(false),
mKeyboardEventWasDispatched(false),
mKeyboardEventWasConsumed(false),
mIsDeletingSurrounding(false),
mLayoutChanged(false),
mSetCursorPositionOnKeyEvent(true),
mPendingResettingIMContext(false),
mRetrieveSurroundingSignalReceived(false),
mMaybeInDeadKeySequence(false),
mIsIMInAsyncKeyHandlingMode(false),
mSetInputPurposeAndInputHints(false) {
static bool sFirstInstance = true;
if (sFirstInstance) {
sFirstInstance = false;
sUseSimpleContext =
Preferences::GetBool("intl.ime.use_simple_context_on_password_field",
kUseSimpleContextDefault);
}
Init();
}
static bool IsIBusInSyncMode() {
// See ibus_im_context_class_init() in client/gtk2/ibusimcontext.c
// https://github.com/ibus/ibus/blob/86963f2f94d1e4fc213b01c2bc2ba9dcf4b22219/client/gtk2/ibusimcontext.c#L610
const char* env = PR_GetEnv("IBUS_ENABLE_SYNC_MODE");
// See _get_boolean_env() in client/gtk2/ibusimcontext.c
// https://github.com/ibus/ibus/blob/86963f2f94d1e4fc213b01c2bc2ba9dcf4b22219/client/gtk2/ibusimcontext.c#L520-L537
if (!env) {
return false;
}
nsDependentCString envStr(env);
if (envStr.IsEmpty() || envStr.EqualsLiteral("0") ||
envStr.EqualsLiteral("false") || envStr.EqualsLiteral("False") ||
envStr.EqualsLiteral("FALSE")) {
return false;
}
return true;
}
static bool GetFcitxBoolEnv(const char* aEnv) {
// See fcitx_utils_get_boolean_env in src/lib/fcitx-utils/utils.c
// https://github.com/fcitx/fcitx/blob/0c87840dc7d9460c2cb5feaeefec299d0d3d62ec/src/lib/fcitx-utils/utils.c#L721-L736
const char* env = PR_GetEnv(aEnv);
if (!env) {
return false;
}
nsDependentCString envStr(env);
if (envStr.IsEmpty() || envStr.EqualsLiteral("0") ||
envStr.EqualsLiteral("false")) {
return false;
}
return true;
}
static bool IsFcitxInSyncMode() {
// See fcitx_im_context_class_init() in src/frontend/gtk2/fcitximcontext.c
// https://github.com/fcitx/fcitx/blob/78b98d9230dc9630e99d52e3172bdf440ffd08c4/src/frontend/gtk2/fcitximcontext.c#L395-L398
return GetFcitxBoolEnv("IBUS_ENABLE_SYNC_MODE") ||
GetFcitxBoolEnv("FCITX_ENABLE_SYNC_MODE");
}
nsDependentCSubstring IMContextWrapper::GetIMName() const {
const char* contextIDChar =
gtk_im_multicontext_get_context_id(GTK_IM_MULTICONTEXT(mContext));
if (!contextIDChar) {
return nsDependentCSubstring();
}
nsDependentCSubstring im(contextIDChar, strlen(contextIDChar));
// If the context is XIM, actual engine must be specified with
// |XMODIFIERS=@im=foo|.
const char* xmodifiersChar = PR_GetEnv("XMODIFIERS");
if (!xmodifiersChar || !im.EqualsLiteral("xim")) {
return im;
}
nsDependentCString xmodifiers(xmodifiersChar);
int32_t atIMValueStart = xmodifiers.Find("@im=") + 4;
if (atIMValueStart < 4 ||
xmodifiers.Length() <= static_cast<size_t>(atIMValueStart)) {
return im;
}
int32_t atIMValueEnd = xmodifiers.Find("@", atIMValueStart);
if (atIMValueEnd > atIMValueStart) {
return nsDependentCSubstring(xmodifiersChar + atIMValueStart,
atIMValueEnd - atIMValueStart);
}
if (atIMValueEnd == kNotFound) {
return nsDependentCSubstring(xmodifiersChar + atIMValueStart,
strlen(xmodifiersChar) - atIMValueStart);
}
return im;
}
void IMContextWrapper::Init() {
MozContainer* container = mOwnerWindow->GetMozContainer();
MOZ_ASSERT(container, "container is null");
GdkWindow* gdkWindow = gtk_widget_get_window(GTK_WIDGET(container));
// Overwrite selection colors of the window before associating the window
// with IM context since IME may look up selection colors via IM context
// to support any colored widgets.
SelectionStyleProvider::GetInstance()->AttachTo(gdkWindow);
// 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);
nsDependentCSubstring im = GetIMName();
if (im.EqualsLiteral("ibus")) {
mIMContextID = IMContextID::IBus;
mIsIMInAsyncKeyHandlingMode = !IsIBusInSyncMode();
// Although ibus has key snooper mode, it's forcibly disabled on Firefox
// in default settings by its whitelist since we always send key events
// to IME before handling shortcut keys. The whitelist can be
// customized with env, IBUS_NO_SNOOPER_APPS, but we don't need to
// support such rare cases for reducing maintenance cost.
mIsKeySnooped = false;
} else if (im.EqualsLiteral("fcitx")) {
mIMContextID = IMContextID::Fcitx;
mIsIMInAsyncKeyHandlingMode = !IsFcitxInSyncMode();
// Although Fcitx has key snooper mode similar to ibus, it's also
// disabled on Firefox in default settings by its whitelist. The
// whitelist can be customized with env, IBUS_NO_SNOOPER_APPS or
// FCITX_NO_SNOOPER_APPS, but we don't need to support such rare cases
// for reducing maintenance cost.
mIsKeySnooped = false;
} else if (im.EqualsLiteral("fcitx5")) {
mIMContextID = IMContextID::Fcitx5;
mIsIMInAsyncKeyHandlingMode = true; // does not have sync mode.
mIsKeySnooped = false; // never use key snooper.
} else if (im.EqualsLiteral("uim")) {
mIMContextID = IMContextID::Uim;
mIsIMInAsyncKeyHandlingMode = false;
// We cannot know if uim uses key snooper since it's build option of
// uim. Therefore, we need to retrieve the consideration from the
// pref for making users and distributions allowed to choose their
// preferred value.
mIsKeySnooped =
Preferences::GetBool("intl.ime.hack.uim.using_key_snooper", true);
} else if (im.EqualsLiteral("scim")) {
mIMContextID = IMContextID::Scim;
mIsIMInAsyncKeyHandlingMode = false;
mIsKeySnooped = false;
} else if (im.EqualsLiteral("iiim")) {
mIMContextID = IMContextID::IIIMF;
mIsIMInAsyncKeyHandlingMode = false;
mIsKeySnooped = false;
} else if (im.EqualsLiteral("wayland")) {
mIMContextID = IMContextID::Wayland;
mIsIMInAsyncKeyHandlingMode = false;
mIsKeySnooped = true;
} else {
mIMContextID = IMContextID::Unknown;
mIsIMInAsyncKeyHandlingMode = false;
mIsKeySnooped = false;
}
// 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);
MOZ_LOG(gIMELog, LogLevel::Info,
("0x%p Init(), mOwnerWindow=%p, mContext=%p (im=\"%s\"), "
"mIsIMInAsyncKeyHandlingMode=%s, mIsKeySnooped=%s, "
"mSimpleContext=%p, mDummyContext=%p, "
"gtk_im_multicontext_get_context_id()=\"%s\", "
"PR_GetEnv(\"XMODIFIERS\")=\"%s\"",
this, mOwnerWindow, mContext, nsAutoCString(im).get(),
ToChar(mIsIMInAsyncKeyHandlingMode), ToChar(mIsKeySnooped),
mSimpleContext, mDummyContext,
gtk_im_multicontext_get_context_id(GTK_IM_MULTICONTEXT(mContext)),
PR_GetEnv("XMODIFIERS")));
}
/* static */
void IMContextWrapper::Shutdown() { SelectionStyleProvider::Shutdown(); }
IMContextWrapper::~IMContextWrapper() {
if (this == sLastFocusedContext) {
sLastFocusedContext = nullptr;
}
MOZ_LOG(gIMELog, 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 IsComposing() ? EndIMEComposition(window) : NS_OK;
}
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() {
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(
gIMELog, LogLevel::Info,
("0x%p OnDestroyWindow(aWindow=0x%p), mLastFocusedWindow=0x%p, "
"mOwnerWindow=0x%p, mLastFocusedModule=0x%p",
this, aWindow, mLastFocusedWindow, mOwnerWindow, sLastFocusedContext));
MOZ_ASSERT(aWindow, "aWindow must not be null");
if (mLastFocusedWindow == aWindow) {
if (IsComposing()) {
EndIMEComposition(aWindow);
}
NotifyIMEOfFocusChange(IMEFocusState::Blurred);
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 = IMEEnabled::Disabled;
mPostingKeyEvents.Clear();
MOZ_LOG(gIMELog, LogLevel::Debug,
("0x%p OnDestroyWindow(), succeeded, Completely destroyed", this));
}
void IMContextWrapper::PrepareToDestroyContext(GtkIMContext* aContext) {
if (mIMContextID == IMContextID::IIIMF) {
// IIIM module registers handlers for the "closed" signal on the
// display, but the signal handler is not disconnected when the module
// is unloaded. To prevent the module from being unloaded, use static
// variable to hold reference of slave context class declared by IIIM.
// Note that this does not grab any instance, it grabs the "class".
static gpointer sGtkIIIMContextClass = nullptr;
if (!sGtkIIIMContextClass) {
// We retrieved slave context class with g_type_name() and actual
// slave context instance when our widget was GTK2. That must be
// _GtkIMContext::priv::slave in GTK3. However, _GtkIMContext::priv
// is an opacity struct named _GtkIMMulticontextPrivate, i.e., it's
// not exposed by GTK3. Therefore, we cannot access the instance
// safely. So, we need to retrieve the slave context class with
// g_type_from_name("GtkIMContextIIIM") directly (anyway, we needed
// to compare the class name with "GtkIMContextIIIM").
GType IIMContextType = g_type_from_name("GtkIMContextIIIM");
if (IIMContextType) {
sGtkIIIMContextClass = g_type_class_ref(IIMContextType);
MOZ_LOG(gIMELog, LogLevel::Info,
("0x%p PrepareToDestroyContext(), added to reference to "
"GtkIMContextIIIM class to prevent it from being unloaded",
this));
} else {
MOZ_LOG(gIMELog, LogLevel::Error,
("0x%p PrepareToDestroyContext(), FAILED to prevent the "
"IIIM module from being uploaded",
this));
}
}
}
}
void IMContextWrapper::OnFocusWindow(nsWindow* aWindow) {
if (MOZ_UNLIKELY(IsDestroyed())) {
return;
}
MOZ_LOG(gIMELog, LogLevel::Info,
("0x%p OnFocusWindow(aWindow=0x%p), mLastFocusedWindow=0x%p", this,
aWindow, mLastFocusedWindow));
mLastFocusedWindow = aWindow;
}
void IMContextWrapper::OnBlurWindow(nsWindow* aWindow) {
if (MOZ_UNLIKELY(IsDestroyed())) {
return;
}
MOZ_LOG(
gIMELog, LogLevel::Info,
("0x%p OnBlurWindow(aWindow=0x%p), mLastFocusedWindow=0x%p, "
"mIMEFocusState=%s",
this, aWindow, mLastFocusedWindow, ToString(mIMEFocusState).c_str()));
if (mLastFocusedWindow != aWindow) {
return;
}
NotifyIMEOfFocusChange(IMEFocusState::Blurred);
}
KeyHandlingState IMContextWrapper::OnKeyEvent(
nsWindow* aCaller, GdkEventKey* aEvent,
bool aKeyboardEventWasDispatched /* = false */) {
MOZ_ASSERT(aEvent, "aEvent must be non-null");
if (!mInputContext.mIMEState.IsEditable() || MOZ_UNLIKELY(IsDestroyed())) {
return KeyHandlingState::eNotHandled;
}
MOZ_LOG(gIMELog, LogLevel::Info, (">>>>>>>>>>>>>>>>"));
MOZ_LOG(
gIMELog, LogLevel::Info,
("0x%p OnKeyEvent(aCaller=0x%p, "
"aEvent(0x%p): { type=%s, keyval=%s, unicode=0x%X, state=%s, "
"time=%u, hardware_keycode=%u, group=%u }, "
"aKeyboardEventWasDispatched=%s)",
this, aCaller, aEvent, GetEventType(aEvent),
gdk_keyval_name(aEvent->keyval), gdk_keyval_to_unicode(aEvent->keyval),
GetEventStateName(aEvent->state, mIMContextID).get(), aEvent->time,
aEvent->hardware_keycode, aEvent->group,
ToChar(aKeyboardEventWasDispatched)));
MOZ_LOG(
gIMELog, LogLevel::Info,
("0x%p OnKeyEvent(), mMaybeInDeadKeySequence=%s, "
"mCompositionState=%s, current context=%p, active context=%p, "
"mIMContextID=%s, mIsIMInAsyncKeyHandlingMode=%s",
this, ToChar(mMaybeInDeadKeySequence), GetCompositionStateName(),
GetCurrentContext(), GetActiveContext(), ToString(mIMContextID).c_str(),
ToChar(mIsIMInAsyncKeyHandlingMode)));
if (aCaller != mLastFocusedWindow) {
MOZ_LOG(gIMELog, LogLevel::Error,
("0x%p OnKeyEvent(), FAILED, the caller isn't focused "
"window, mLastFocusedWindow=0x%p",
this, mLastFocusedWindow));
return KeyHandlingState::eNotHandled;
}
// 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(gIMELog, LogLevel::Error,
("0x%p OnKeyEvent(), FAILED, there are no context", this));
return KeyHandlingState::eNotHandled;
}
if (mSetCursorPositionOnKeyEvent) {
SetCursorPosition(currentContext);
mSetCursorPositionOnKeyEvent = false;
}
// Let's support dead key event even if active keyboard layout also
// supports complicated composition like CJK IME.
bool isDeadKey =
KeymapWrapper::ComputeDOMKeyNameIndex(aEvent) == KEY_NAME_INDEX_Dead;
mMaybeInDeadKeySequence |= isDeadKey;
// If current context is mSimpleContext, both ibus and fcitx handles key
// events synchronously. So, only when current context is mContext which
// is GtkIMMulticontext, the key event may be handled by IME asynchronously.
bool probablyHandledAsynchronously =
mIsIMInAsyncKeyHandlingMode && currentContext == mContext;
// If we're not sure whether the event is handled asynchronously, this is
// set to true.
bool maybeHandledAsynchronously = false;
// If aEvent is a synthesized event for async handling, this will be set to
// true.
bool isHandlingAsyncEvent = false;
// If we've decided that the event won't be synthesized asyncrhonously
// by IME, but actually IME did it, this is set to true.
bool isUnexpectedAsyncEvent = false;
// If IM is ibus or fcitx and it handles key events asynchronously,
// they mark aEvent->state as "handled by me" when they post key event
// to another process. Unfortunately, we need to check this hacky
// flag because it's difficult to store all pending key events by
// an array or a hashtable.
if (probablyHandledAsynchronously) {
switch (mIMContextID) {
case IMContextID::IBus: {
// See src/ibustypes.h
static const guint IBUS_IGNORED_MASK = 1 << 25;
// If IBUS_IGNORED_MASK was set to aEvent->state, the event
// has already been handled by another process and it wasn't
// used by IME.
isHandlingAsyncEvent = !!(aEvent->state & IBUS_IGNORED_MASK);
if (!isHandlingAsyncEvent) {
// On some environments, IBUS_IGNORED_MASK flag is not set as
// expected. In such case, we keep pusing all events into the queue.
// I.e., that causes eating a lot of memory until it's blurred.
// Therefore, we need to check whether there is same timestamp event
// in the queue. This redundant cost should be low because in most
// causes, key events in the queue should be 2 or 4.
isHandlingAsyncEvent =
mPostingKeyEvents.IndexOf(aEvent) != GdkEventKeyQueue::NoIndex();
if (isHandlingAsyncEvent) {
MOZ_LOG(gIMELog, LogLevel::Info,
("0x%p OnKeyEvent(), aEvent->state does not have "
"IBUS_IGNORED_MASK but "
"same event in the queue. So, assuming it's a "
"synthesized event",
this));
}
}
// If it's a synthesized event, let's remove it from the posting
// event queue first. Otherwise the following blocks cannot use
// `break`.
if (isHandlingAsyncEvent) {
MOZ_LOG(gIMELog, LogLevel::Info,
("0x%p OnKeyEvent(), aEvent->state has IBUS_IGNORED_MASK "
"or aEvent is in the "
"posting event queue, so, it won't be handled "
"asynchronously anymore. Removing "
"the posted events from the queue",
this));
probablyHandledAsynchronously = false;
mPostingKeyEvents.RemoveEvent(aEvent);
}
// ibus won't send back key press events in a dead key sequcne.
if (mMaybeInDeadKeySequence && aEvent->type == GDK_KEY_PRESS) {
probablyHandledAsynchronously = false;
if (isHandlingAsyncEvent) {
isUnexpectedAsyncEvent = true;
break;
}
// Some keyboard layouts which have dead keys may send
// "empty" key event to make us call
// gtk_im_context_filter_keypress() to commit composed
// character during a GDK_KEY_PRESS event dispatching.
if (!gdk_keyval_to_unicode(aEvent->keyval) &&
!aEvent->hardware_keycode) {
isUnexpectedAsyncEvent = true;
break;
}
break;
}
// ibus may handle key events synchronously if focused editor is
// <input type="password"> or |ime-mode: disabled;|. However, in
// some environments, not so actually. Therefore, we need to check
// the result of gtk_im_context_filter_keypress() later.
if (mInputContext.mIMEState.mEnabled == IMEEnabled::Password) {
probablyHandledAsynchronously = false;
maybeHandledAsynchronously = !isHandlingAsyncEvent;
break;
}
break;
}
case IMContextID::Fcitx:
case IMContextID::Fcitx5: {
// See src/lib/fcitx-utils/keysym.h
static const guint FcitxKeyState_IgnoredMask = 1 << 25;
// If FcitxKeyState_IgnoredMask was set to aEvent->state,
// the event has already been handled by another process and
// it wasn't used by IME.
isHandlingAsyncEvent = !!(aEvent->state & FcitxKeyState_IgnoredMask);
if (!isHandlingAsyncEvent) {
// On some environments, FcitxKeyState_IgnoredMask flag *might* be not
// set as expected. If there were such cases, we'd keep pusing all
// events into the queue. I.e., that would cause eating a lot of
// memory until it'd be blurred. Therefore, we should check whether
// there is same timestamp event in the queue. This redundant cost
// should be low because in most causes, key events in the queue
// should be 2 or 4.
isHandlingAsyncEvent =
mPostingKeyEvents.IndexOf(aEvent) != GdkEventKeyQueue::NoIndex();
if (isHandlingAsyncEvent) {
MOZ_LOG(gIMELog, LogLevel::Info,
("0x%p OnKeyEvent(), aEvent->state does not have "
"FcitxKeyState_IgnoredMask "
"but same event in the queue. So, assuming it's a "
"synthesized event",
this));
}
}
// fcitx won't send back key press events in a dead key sequcne.
if (mMaybeInDeadKeySequence && aEvent->type == GDK_KEY_PRESS) {
probablyHandledAsynchronously = false;
if (isHandlingAsyncEvent) {
isUnexpectedAsyncEvent = true;
break;
}
// Some keyboard layouts which have dead keys may send
// "empty" key event to make us call
// gtk_im_context_filter_keypress() to commit composed
// character during a GDK_KEY_PRESS event dispatching.
if (!gdk_keyval_to_unicode(aEvent->keyval) &&
!aEvent->hardware_keycode) {
isUnexpectedAsyncEvent = true;
break;
}
}
// fcitx handles key events asynchronously even if focused
// editor cannot use IME actually.
if (isHandlingAsyncEvent) {
MOZ_LOG(gIMELog, LogLevel::Info,
("0x%p OnKeyEvent(), aEvent->state has "
"FcitxKeyState_IgnoredMask or aEvent is in "
"the posting event queue, so, it won't be handled "
"asynchronously anymore. "
"Removing the posted events from the queue",
this));
probablyHandledAsynchronously = false;
mPostingKeyEvents.RemoveEvent(aEvent);
break;
}
break;
}
default:
MOZ_ASSERT_UNREACHABLE(
"IME may handle key event "
"asyncrhonously, but not yet confirmed if it comes agian "
"actually");
}
}
if (!isUnexpectedAsyncEvent) {
mKeyboardEventWasDispatched = aKeyboardEventWasDispatched;
mKeyboardEventWasConsumed = false;
} else {
// If we didn't expect this event, we've alreday dispatched eKeyDown
// event or eKeyUp event for that.
mKeyboardEventWasDispatched = true;
// And in this case, we need to assume that another key event hasn't
// been receivied and mKeyboardEventWasConsumed keeps storing the
// dispatched eKeyDown or eKeyUp event's state.
}
mFallbackToKeyEvent = false;
mProcessingKeyEvent = aEvent;
gboolean isFiltered = gtk_im_context_filter_keypress(currentContext, aEvent);
// If we're not sure whether the event is handled by IME asynchronously or
// synchronously, we need to trust the result of
// gtk_im_context_filter_keypress(). If it consumed and but did nothing,
// we can assume that another event will be synthesized.
if (!isHandlingAsyncEvent && maybeHandledAsynchronously) {
probablyHandledAsynchronously |=
isFiltered && !mFallbackToKeyEvent && !mKeyboardEventWasDispatched;
}
if (aEvent->type == GDK_KEY_PRESS) {
if (isFiltered && probablyHandledAsynchronously) {
sWaitingSynthesizedKeyPressHardwareKeyCode = aEvent->hardware_keycode;
} else {
sWaitingSynthesizedKeyPressHardwareKeyCode = 0;
}
}
// The caller of this shouldn't handle aEvent anymore if we've dispatched
// composition events or modified content with other events.
bool filterThisEvent = isFiltered && !mFallbackToKeyEvent;
if (IsComposingOnCurrentContext() && !isFiltered &&
aEvent->type == GDK_KEY_PRESS && mDispatchedCompositionString.IsEmpty()) {
// 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.
// NOTE: Don't dispatch key events as "processed by IME" since
// we need to dispatch keyboard events as IME wasn't handled it.
mProcessingKeyEvent = nullptr;
DispatchCompositionCommitEvent(currentContext, &EmptyString());
mProcessingKeyEvent = aEvent;
// In this case, even though we handle the keyboard event here,
// but we should dispatch keydown event as
filterThisEvent = false;
}
if (filterThisEvent && !mKeyboardEventWasDispatched) {
// If IME handled the key event but we've not dispatched eKeyDown nor
// eKeyUp event yet, we need to dispatch here unless the key event is
// now being handled by other IME process.
if (!probablyHandledAsynchronously) {
MaybeDispatchKeyEventAsProcessedByIME(eVoidEvent);
// Be aware, the widget might have been gone here.
}
// If we need to wait reply from IM, IM may send some signals to us
// without sending the key event again. In such case, we need to
// dispatch keyboard events with a copy of aEvent. Therefore, we
// need to use information of this key event to dispatch an KeyDown
// or eKeyUp event later.
else {
MOZ_LOG(gIMELog, LogLevel::Info,
("0x%p OnKeyEvent(), putting aEvent into the queue...", this));
mPostingKeyEvents.PutEvent(aEvent);
}
}
mProcessingKeyEvent = nullptr;
if (aEvent->type == GDK_KEY_PRESS && !filterThisEvent) {
// If the key event hasn't been handled by active IME nor keyboard
// layout, we can assume that the dead key sequence has been or was
// ended. Note that we should not reset it when the key event is
// GDK_KEY_RELEASE since it may not be filtered by active keyboard
// layout even in composition.
mMaybeInDeadKeySequence = false;
}
if (aEvent->type == GDK_KEY_RELEASE) {
if (const GdkEventKey* pendingKeyPressEvent =
mPostingKeyEvents.GetCorrespondingKeyPressEvent(aEvent)) {
MOZ_LOG(gIMELog, LogLevel::Warning,
("0x%p OnKeyEvent(), forgetting a pending GDK_KEY_PRESS event "
"because GDK_KEY_RELEASE for the event is handled",
this));
mPostingKeyEvents.RemoveEvent(pendingKeyPressEvent);
}
}
MOZ_LOG(
gIMELog, LogLevel::Debug,
("0x%p OnKeyEvent(), succeeded, filterThisEvent=%s "
"(isFiltered=%s, mFallbackToKeyEvent=%s, "
"probablyHandledAsynchronously=%s, maybeHandledAsynchronously=%s), "
"mPostingKeyEvents.Length()=%zu, mCompositionState=%s, "
"mMaybeInDeadKeySequence=%s, mKeyboardEventWasDispatched=%s, "
"mKeyboardEventWasConsumed=%s",
this, ToChar(filterThisEvent), ToChar(isFiltered),
ToChar(mFallbackToKeyEvent), ToChar(probablyHandledAsynchronously),
ToChar(maybeHandledAsynchronously), mPostingKeyEvents.Length(),
GetCompositionStateName(), ToChar(mMaybeInDeadKeySequence),
ToChar(mKeyboardEventWasDispatched), ToChar(mKeyboardEventWasConsumed)));
MOZ_LOG(gIMELog, LogLevel::Info, ("<<<<<<<<<<<<<<<<\n\n"));
if (filterThisEvent) {
return KeyHandlingState::eHandled;
}
// If another call of this method has already dispatched eKeyDown event,
// we should return KeyHandlingState::eNotHandledButEventDispatched because
// the caller should've stopped handling the event if preceding eKeyDown
// event was consumed.
if (aKeyboardEventWasDispatched) {
return KeyHandlingState::eNotHandledButEventDispatched;
}
if (!mKeyboardEventWasDispatched) {
return KeyHandlingState::eNotHandled;
}
return mKeyboardEventWasConsumed
? KeyHandlingState::eNotHandledButEventConsumed
: KeyHandlingState::eNotHandledButEventDispatched;
}
void IMContextWrapper::OnFocusChangeInGecko(bool aFocus) {
MOZ_LOG(gIMELog, LogLevel::Info,
("0x%p OnFocusChangeInGecko(aFocus=%s),mCompositionState=%s, "
"mIMEFocusState=%s, mSetInputPurposeAndInputHints=%s",
this, ToChar(aFocus), GetCompositionStateName(),
ToString(mIMEFocusState).c_str(),
ToChar(mSetInputPurposeAndInputHints)));
// We shouldn't carry over the removed string to another editor.
mSelectedStringRemovedByComposition.Truncate();
mContentSelection.reset();
if (aFocus) {
if (mSetInputPurposeAndInputHints) {
mSetInputPurposeAndInputHints = false;
SetInputPurposeAndInputHints();
}
NotifyIMEOfFocusChange(IMEFocusState::Focused);
} else {
NotifyIMEOfFocusChange(IMEFocusState::Blurred);
}
// When the focus changes, we need to inform IM about the new cursor
// position. Chinese input methods generally rely on this because they
// usually don't start composition until a character is picked.
if (aFocus && EnsureToCacheContentSelection()) {
SetCursorPosition(GetActiveContext());
}
}
void IMContextWrapper::ResetIME() {
MOZ_LOG(gIMELog, LogLevel::Info,
("0x%p ResetIME(), mCompositionState=%s, mIMEFocusState=%s", this,
GetCompositionStateName(), ToString(mIMEFocusState).c_str()));
GtkIMContext* activeContext = GetActiveContext();
if (MOZ_UNLIKELY(!activeContext)) {
MOZ_LOG(gIMELog, 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(gIMELog, LogLevel::Debug,
("0x%p ResetIME() called gtk_im_context_reset(), "
"activeContext=0x%p, mCompositionState=%s, compositionString=%s, "
"mIMEFocusState=%s",
this, activeContext, GetCompositionStateName(),
NS_ConvertUTF16toUTF8(compositionString).get(),
ToString(mIMEFocusState).c_str()));
// 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(gIMELog, LogLevel::Info,
("0x%p EndIMEComposition(aCaller=0x%p), "
"mCompositionState=%s",
this, aCaller, GetCompositionStateName()));
if (aCaller != mLastFocusedWindow) {
MOZ_LOG(gIMELog, 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
mContentSelection.reset();
EnsureToCacheContentSelection();
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(gIMELog, LogLevel::Info,
("0x%p SetInputContext(aCaller=0x%p, aContext={ mIMEState={ "
"mEnabled=%s }, mHTMLInputType=%s })",
this, aCaller, ToString(aContext->mIMEState.mEnabled).c_str(),
NS_ConvertUTF16toUTF8(aContext->mHTMLInputType).get()));
if (aCaller != mLastFocusedWindow) {
MOZ_LOG(gIMELog, LogLevel::Error,
("0x%p SetInputContext(), FAILED, "
"the caller isn't focused window, mLastFocusedWindow=0x%p",
this, mLastFocusedWindow));
return;
}
if (!mContext) {
MOZ_LOG(gIMELog, LogLevel::Error,
("0x%p SetInputContext(), FAILED, "
"there are no context",
this));
return;
}
if (sLastFocusedContext != this) {
mInputContext = *aContext;
MOZ_LOG(gIMELog, LogLevel::Debug,
("0x%p SetInputContext(), succeeded, "
"but we're not active",
this));
return;
}
const bool changingEnabledState =
aContext->IsInputAttributeChanged(mInputContext);
// Release current IME focus if IME is enabled.
if (changingEnabledState && mInputContext.mIMEState.IsEditable()) {
if (IsComposing()) {
EndIMEComposition(mLastFocusedWindow);
}
if (mIMEFocusState == IMEFocusState::Focused) {
NotifyIMEOfFocusChange(IMEFocusState::BlurredWithoutFocusChange);
}
}
mInputContext = *aContext;
mSetInputPurposeAndInputHints = false;
if (!changingEnabledState || !mInputContext.mIMEState.IsEditable()) {
return;
}
// If the input context was temporarily disabled without a focus change,
// it must be ready to query content even if the focused content is in
// a remote process. In this case, we should set IME focus right now.
if (mIMEFocusState == IMEFocusState::BlurredWithoutFocusChange) {
SetInputPurposeAndInputHints();
NotifyIMEOfFocusChange(IMEFocusState::Focused);
return;
}
// Otherwise, we cannot set input-purpose and input-hints right now because
// setting them may require to set focus immediately for IME own's UI.
// However, at this moment, `ContentCacheInParent` does not have content
// cache, it'll be available after `NOTIFY_IME_OF_FOCUS` notification.
// Therefore, we set them at receiving the notification.
mSetInputPurposeAndInputHints = true;
}
void IMContextWrapper::SetInputPurposeAndInputHints() {
GtkIMContext* currentContext = GetCurrentContext();
if (!currentContext) {
return;
}
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 == IMEEnabled::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;
} else if (mInputContext.mHTMLInputMode.EqualsLiteral("decimal")) {
purpose = GTK_INPUT_PURPOSE_NUMBER;
} else if (mInputContext.mHTMLInputMode.EqualsLiteral("email")) {
purpose = GTK_INPUT_PURPOSE_EMAIL;
} else if (mInputContext.mHTMLInputMode.EqualsLiteral("numeric")) {
purpose = GTK_INPUT_PURPOSE_DIGITS;
} else if (mInputContext.mHTMLInputMode.EqualsLiteral("tel")) {
purpose = GTK_INPUT_PURPOSE_PHONE;
} else if (mInputContext.mHTMLInputMode.EqualsLiteral("url")) {
purpose = GTK_INPUT_PURPOSE_URL;
}
// Search by type and inputmode isn't supported on GTK.
g_object_set(currentContext, "input-purpose", purpose, nullptr);
// Although GtkInputHints is enum type, value is bit field.
gint hints = GTK_INPUT_HINT_NONE;
if (mInputContext.mHTMLInputMode.EqualsLiteral("none")) {
hints |= GTK_INPUT_HINT_INHIBIT_OSK;
}
if (mInputContext.mAutocapitalize.EqualsLiteral("characters")) {
hints |= GTK_INPUT_HINT_UPPERCASE_CHARS;
} else if (mInputContext.mAutocapitalize.EqualsLiteral("sentences")) {
hints |= GTK_INPUT_HINT_UPPERCASE_SENTENCES;
} else if (mInputContext.mAutocapitalize.EqualsLiteral("words")) {
hints |= GTK_INPUT_HINT_UPPERCASE_WORDS;
}
g_object_set(currentContext, "input-hints", hints, nullptr);
}
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 == IMEEnabled::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 == IMEEnabled::Enabled ||
(!sUseSimpleContext &&
mInputContext.mIMEState.mEnabled == IMEEnabled::Password);
}
void IMContextWrapper::NotifyIMEOfFocusChange(IMEFocusState aIMEFocusState) {
MOZ_ASSERT_IF(aIMEFocusState == IMEFocusState::BlurredWithoutFocusChange,
mIMEFocusState != IMEFocusState::Blurred);
if (mIMEFocusState == aIMEFocusState) {
return;
}
MOZ_LOG(gIMELog, LogLevel::Info,
("0x%p NotifyIMEOfFocusChange(aIMEFocusState=%s), mIMEFocusState=%s, "
"sLastFocusedContext=0x%p",
this, ToString(aIMEFocusState).c_str(),
ToString(mIMEFocusState).c_str(), sLastFocusedContext));
MOZ_ASSERT(!mSetInputPurposeAndInputHints);
// If we've already made IME blurred at setting the input context disabled
// and it's now completely blurred by a focus move, we need only to update
// mIMEFocusState and when the input context gets enabled, we cannot set
// IME focus immediately.
if (aIMEFocusState == IMEFocusState::Blurred &&
mIMEFocusState == IMEFocusState::BlurredWithoutFocusChange) {
mIMEFocusState = IMEFocusState::Blurred;
return;
}
auto Blur = [&](IMEFocusState aInternalState) {
GtkIMContext* currentContext = GetCurrentContext();
if (MOZ_UNLIKELY(!currentContext)) {
MOZ_LOG(gIMELog, LogLevel::Error,
("0x%p NotifyIMEOfFocusChange()::Blur(), FAILED, "
"there is no context",
this));
return;
}
gtk_im_context_focus_out(currentContext);
mIMEFocusState = aInternalState;
};
if (aIMEFocusState != IMEFocusState::Focused) {
return Blur(aIMEFocusState);
}
GtkIMContext* currentContext = GetCurrentContext();
if (MOZ_UNLIKELY(!currentContext)) {
MOZ_LOG(gIMELog, LogLevel::Error,
("0x%p NotifyIMEOfFocusChange(), FAILED, "
"there is no context",
this));
return;
}
if (sLastFocusedContext && sLastFocusedContext != this) {
sLastFocusedContext->NotifyIMEOfFocusChange(IMEFocusState::Blurred);
}
sLastFocusedContext = this;
// Forget all posted key events when focus is moved since they shouldn't
// be fired in different editor.
sWaitingSynthesizedKeyPressHardwareKeyCode = 0;
mPostingKeyEvents.Clear();
gtk_im_context_focus_in(currentContext);
mIMEFocusState = aIMEFocusState;
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(IMEFocusState::BlurredWithoutFocusChange);
}
}
void IMContextWrapper::OnSelectionChange(
nsWindow* aCaller, const IMENotification& aIMENotification) {
const bool isSelectionRangeChanged =
mContentSelection.isNothing() ||
!aIMENotification.mSelectionChangeData.EqualsRange(
mContentSelection.ref());
mContentSelection =
Some(ContentSelection(aIMENotification.mSelectionChangeData));
const bool retrievedSurroundingSignalReceived =
mRetrieveSurroundingSignalReceived;
mRetrieveSurroundingSignalReceived = false;
if (MOZ_UNLIKELY(IsDestroyed())) {
return;
}
const IMENotification::SelectionChangeDataBase& selectionChangeData =
aIMENotification.mSelectionChangeData;
MOZ_LOG(gIMELog, LogLevel::Info,
("0x%p OnSelectionChange(aCaller=0x%p, aIMENotification={ "
"mSelectionChangeData=%s }), "
"mCompositionState=%s, mIsDeletingSurrounding=%s, "
"mRetrieveSurroundingSignalReceived=%s, isSelectionRangeChanged=%s",
this, aCaller, ToString(selectionChangeData).c_str(),
GetCompositionStateName(), ToChar(mIsDeletingSurrounding),
ToChar(retrievedSurroundingSignalReceived),
ToChar(isSelectionRangeChanged)));
if (aCaller != mLastFocusedWindow) {
MOZ_LOG(gIMELog, 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(mContentSelection.isNothing())) {
MOZ_LOG(gIMELog, LogLevel::Error,
("0x%p OnSelectionChange(), FAILED, "
"new offset is too large, cannot keep composing",
this));
} else if (mContentSelection->HasRange()) {
// Modify the selection start offset with new offset.
mCompositionStart = mContentSelection->OffsetAndDataRef().StartOffset();
// XXX We should modify mSelectedStringRemovedByComposition?
// But how?
MOZ_LOG(gIMELog, 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;
} else {
MOZ_LOG(
gIMELog, LogLevel::Debug,
("0x%p OnSelectionChange(), ignored, because of no selection range",
this));
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.
// Don't do this even if selection is not changed actually. For example,
// fcitx has direct input mode which does not insert composing string, but
// inserts commited text for each key sequence (i.e., there is "invisible"
// composition string). In the world after bug 1712269, we don't use a
// set of composition events for this kind of IME. Therefore,
// SelectionChangeData.mCausedByComposition is not expected value for here
// if this call is caused by a preceding commit. And if the preceding commit
// is triggered by a key type for next word, resetting IME state makes fcitx
// discard the pending input for the next word. Thus, we need to check
// whether the selection range is actually changed here.
if (!selectionChangeData.mCausedByComposition &&
!selectionChangeData.mCausedBySelectionEvent && isSelectionRangeChanged &&
!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::OnThemeChanged() {
if (auto* provider = SelectionStyleProvider::GetExistingInstance()) {
provider->OnThemeChanged();
}
}
/* static */
void IMContextWrapper::OnStartCompositionCallback(GtkIMContext* aContext,
IMContextWrapper* aModule) {
aModule->OnStartCompositionNative(aContext);
}
void IMContextWrapper::OnStartCompositionNative(GtkIMContext* aContext) {
// IME may synthesize composition asynchronously after filtering a
// GDK_KEY_PRESS event. In that case, we should handle composition with
// emulating the usual case, i.e., this is called in the stack of
// OnKeyEvent().
Maybe<AutoRestore<GdkEventKey*>> maybeRestoreProcessingKeyEvent;
if (!mProcessingKeyEvent && !mPostingKeyEvents.IsEmpty()) {
GdkEventKey* keyEvent = mPostingKeyEvents.GetFirstEvent();
if (keyEvent && keyEvent->type == GDK_KEY_PRESS &&
KeymapWrapper::ComputeDOMKeyNameIndex(keyEvent) ==
KEY_NAME_INDEX_USE_STRING) {
maybeRestoreProcessingKeyEvent.emplace(mProcessingKeyEvent);
mProcessingKeyEvent = mPostingKeyEvents.GetFirstEvent();
}
}
MOZ_LOG(gIMELog, 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(gIMELog, 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(gIMELog, 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(gIMELog, 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(gIMELog, 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(gIMELog, 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) {
// IME may synthesize composition asynchronously after filtering a
// GDK_KEY_PRESS event. In that case, we should handle composition with
// emulating the usual case, i.e., this is called in the stack of
// OnKeyEvent().
Maybe<AutoRestore<GdkEventKey*>> maybeRestoreProcessingKeyEvent;
if (!mProcessingKeyEvent && !mPostingKeyEvents.IsEmpty()) {
GdkEventKey* keyEvent = mPostingKeyEvents.GetFirstEvent();
if (keyEvent && keyEvent->type == GDK_KEY_PRESS &&
KeymapWrapper::ComputeDOMKeyNameIndex(keyEvent) ==
KEY_NAME_INDEX_USE_STRING) {
maybeRestoreProcessingKeyEvent.emplace(mProcessingKeyEvent);
mProcessingKeyEvent = mPostingKeyEvents.GetFirstEvent();
}
}
MOZ_LOG(gIMELog, 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(gIMELog, 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(gIMELog, 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(gIMELog, 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(gIMELog, 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(gIMELog, 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;
}
// Despite taking a pointer and a length, IBus wants the string to be
// zero-terminated and doesn't like U+0000 within the string.
uniStr.ReplaceChar(char16_t(0), char16_t(0xFFFD));
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(gIMELog, 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(gIMELog, 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(gIMELog, 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;
NS_ConvertUTF8toUTF16 utf16CommitString(commitString);
// IME may synthesize composition asynchronously after filtering a
// GDK_KEY_PRESS event. In that case, we should handle composition with
// emulating the usual case, i.e., this is called in the stack of
// OnKeyEvent().
Maybe<AutoRestore<GdkEventKey*>> maybeRestoreProcessingKeyEvent;
if (!mProcessingKeyEvent && !mPostingKeyEvents.IsEmpty()) {
GdkEventKey* keyEvent = mPostingKeyEvents.GetFirstEvent();
if (keyEvent && keyEvent->type == GDK_KEY_PRESS &&
KeymapWrapper::ComputeDOMKeyNameIndex(keyEvent) ==
KEY_NAME_INDEX_USE_STRING) {
maybeRestoreProcessingKeyEvent.emplace(mProcessingKeyEvent);
mProcessingKeyEvent = mPostingKeyEvents.GetFirstEvent();
}
}
MOZ_LOG(gIMELog, 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(gIMELog, 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) && utf16CommitString.IsEmpty()) {
MOZ_LOG(gIMELog, 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,
// we should treat that IME didn't handle the key event because
// web applications want to receive "keydown" and "keypress" event
// in such case.
// 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 &&
mProcessingKeyEvent->type == GDK_KEY_PRESS &&
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 committing string is exactly same as a character which is
// produced by the key, eKeyDown and eKeyPress event should be
// dispatched by the caller of OnKeyEvent() normally. Note that
// mMaybeInDeadKeySequence will be set to false by OnKeyEvent()
// since we set mFallbackToKeyEvent to true here.
if (!strcmp(commitString, keyval_utf8)) {
MOZ_LOG(gIMELog, LogLevel::Info,
("0x%p OnCommitCompositionNative(), "
"we'll send normal key event",
this));
mFallbackToKeyEvent = true;
return;
}
// If we're in a dead key sequence, commit string is a character in
// the BMP and mProcessingKeyEvent produces some characters but it's
// not same as committing string, we should dispatch an eKeyPress
// event from here.
WidgetKeyboardEvent keyDownEvent(true, eKeyDown, mLastFocusedWindow);
KeymapWrapper::InitKeyEvent(keyDownEvent, mProcessingKeyEvent, false);
if (mMaybeInDeadKeySequence && utf16CommitString.Length() == 1 &&
keyDownEvent.mKeyNameIndex == KEY_NAME_INDEX_USE_STRING) {
mKeyboardEventWasDispatched = true;
// Anyway, we're not in dead key sequence anymore.
mMaybeInDeadKeySequence = false;
RefPtr<TextEventDispatcher> dispatcher = GetTextEventDispatcher();
nsresult rv = dispatcher->BeginNativeInputTransaction();
if (NS_WARN_IF(NS_FAILED(rv))) {
MOZ_LOG(gIMELog, LogLevel::Error,
("0x%p OnCommitCompositionNative(), FAILED, "
"due to BeginNativeInputTransaction() failure",
this));
return;
}
// First, dispatch eKeyDown event.
keyDownEvent.mKeyValue = utf16CommitString;
nsEventStatus status = nsEventStatus_eIgnore;
bool dispatched = dispatcher->DispatchKeyboardEvent(
eKeyDown, keyDownEvent, status, mProcessingKeyEvent);
if (!dispatched || status == nsEventStatus_eConsumeNoDefault) {
mKeyboardEventWasConsumed = true;
MOZ_LOG(gIMELog, LogLevel::Info,
("0x%p OnCommitCompositionNative(), "
"doesn't dispatch eKeyPress event because the preceding "
"eKeyDown event was not dispatched or was consumed",
this));
return;
}
if (mLastFocusedWindow != keyDownEvent.mWidget ||
mLastFocusedWindow->Destroyed()) {
MOZ_LOG(gIMELog, LogLevel::Warning,
("0x%p OnCommitCompositionNative(), Warning, "
"stop dispatching eKeyPress event because the preceding "
"eKeyDown event caused changing focused widget or "
"destroyed",
this));
return;
}
MOZ_LOG(gIMELog, LogLevel::Info,
("0x%p OnCommitCompositionNative(), "
"dispatched eKeyDown event for the committed character",
this));
// Next, dispatch eKeyPress event.
dispatcher->MaybeDispatchKeypressEvents(keyDownEvent, status,
mProcessingKeyEvent);
MOZ_LOG(gIMELog, LogLevel::Info,
("0x%p OnCommitCompositionNative(), "
"dispatched eKeyPress event for the committed character",
this));
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(MakeStringSpan(preedit_string), aCompositionString);
} else {
aCompositionString.Truncate();
}
MOZ_LOG(gIMELog, 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::MaybeDispatchKeyEventAsProcessedByIME(
EventMessage aFollowingEvent) {
if (!mLastFocusedWindow) {
return false;
}
if (!mIsKeySnooped &&
((!mProcessingKeyEvent && mPostingKeyEvents.IsEmpty()) ||
(mProcessingKeyEvent && mKeyboardEventWasDispatched))) {
return true;
}
// A "keydown" or "keyup" event handler may change focus with the
// following 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* oldCurrentContext = GetCurrentContext();
GtkIMContext* oldComposingContext = mComposingContext;
RefPtr<nsWindow> lastFocusedWindow(mLastFocusedWindow);
if (mProcessingKeyEvent || !mPostingKeyEvents.IsEmpty()) {
if (mProcessingKeyEvent) {
mKeyboardEventWasDispatched = true;
}
// If we're not handling a key event synchronously, the signal may be
// sent by IME without sending key event to us. In such case, we
// should dispatch keyboard event for the last key event which was
// posted to other IME process.
GdkEventKey* sourceEvent = mProcessingKeyEvent
? mProcessingKeyEvent
: mPostingKeyEvents.GetFirstEvent();
MOZ_LOG(
gIMELog, LogLevel::Info,
("0x%p MaybeDispatchKeyEventAsProcessedByIME("
"aFollowingEvent=%s), dispatch %s %s "
"event: { type=%s, keyval=%s, unicode=0x%X, state=%s, "
"time=%u, hardware_keycode=%u, group=%u }",
this, ToChar(aFollowingEvent),
ToChar(sourceEvent->type == GDK_KEY_PRESS ? eKeyDown : eKeyUp),
mProcessingKeyEvent ? "processing" : "posted",
GetEventType(sourceEvent), gdk_keyval_name(sourceEvent->keyval),
gdk_keyval_to_unicode(sourceEvent->keyval),
GetEventStateName(sourceEvent->state, mIMContextID).get(),
sourceEvent->time, sourceEvent->hardware_keycode, sourceEvent->group));
// Let's dispatch eKeyDown event or eKeyUp event now. Note that only
// when we're not in a dead key composition, we should mark the
// eKeyDown and eKeyUp event as "processed by IME" since we should
// expose raw keyCode and key value to web apps the key event is a
// part of a dead key sequence.
// FYI: We should ignore if default of preceding keydown or keyup
// event is prevented since even on the other browsers, web
// applications cannot cancel the following composition event.
// Spec bug: https://github.com/w3c/uievents/issues/180
KeymapWrapper::DispatchKeyDownOrKeyUpEvent(lastFocusedWindow, sourceEvent,
!mMaybeInDeadKeySequence,
&mKeyboardEventWasConsumed);
MOZ_LOG(gIMELog, LogLevel::Info,
("0x%p MaybeDispatchKeyEventAsProcessedByIME(), keydown or keyup "
"event is dispatched",
this));
if (!mProcessingKeyEvent) {
MOZ_LOG(gIMELog, LogLevel::Info,
("0x%p MaybeDispatchKeyEventAsProcessedByIME(), removing first "
"event from the queue",
this));
mPostingKeyEvents.RemoveEvent(sourceEvent);
}
} else {
MOZ_ASSERT(mIsKeySnooped);
// Currently, we support key snooper mode of uim and wayland only.
MOZ_ASSERT(mIMContextID == IMContextID::Uim ||
mIMContextID == IMContextID::Wayland);
// uim sends "preedit_start" signal and "preedit_changed" separately
// at starting composition, "commit" and "preedit_end" separately at
// committing composition.
// Currently, we should dispatch only fake eKeyDown event because
// we cannot decide which is the last signal of each key operation
// and Chromium also dispatches only "keydown" event in this case.
bool dispatchFakeKeyDown = false;
switch (aFollowingEvent) {
case eCompositionStart:
case eCompositionCommit:
case eCompositionCommitAsIs:
case eContentCommandInsertText:
dispatchFakeKeyDown = true;
break;
// XXX Unfortunately, I don't have a good idea to prevent to
// dispatch redundant eKeyDown event for eCompositionStart
// immediately after "delete_surrounding" signal. However,
// not dispatching eKeyDown event is worse than dispatching
// redundant eKeyDown events.
case eContentCommandDelete:
dispatchFakeKeyDown = true;
break;
// We need to prevent to dispatch redundant eKeyDown event for
// eCompositionChange immediately after eCompositionStart. So,
// We should not dispatch eKeyDown event if dispatched composition
// string is still empty string.
case eCompositionChange:
dispatchFakeKeyDown = !mDispatchedCompositionString.IsEmpty();
break;
default:
MOZ_ASSERT_UNREACHABLE("Do you forget to handle the case?");
break;
}
if (dispatchFakeKeyDown) {
WidgetKeyboardEvent fakeKeyDownEvent(true, eKeyDown, lastFocusedWindow);
fakeKeyDownEvent.mKeyCode = NS_VK_PROCESSKEY;
fakeKeyDownEvent.mKeyNameIndex = KEY_NAME_INDEX_Process;
// It's impossible to get physical key information in this case but
// this should be okay since web apps shouldn't do anything with
// physical key information during composition.
fakeKeyDownEvent.mCodeNameIndex = CODE_NAME_INDEX_UNKNOWN;
MOZ_LOG(gIMELog, LogLevel::Info,
("0x%p MaybeDispatchKeyEventAsProcessedByIME("
"aFollowingEvent=%s), dispatch fake eKeyDown event",
this, ToChar(aFollowingEvent)));
KeymapWrapper::DispatchKeyDownOrKeyUpEvent(
lastFocusedWindow, fakeKeyDownEvent, &mKeyboardEventWasConsumed);
MOZ_LOG(gIMELog, LogLevel::Info,
("0x%p MaybeDispatchKeyEventAsProcessedByIME(), "
"fake keydown event is dispatched",
this));
}
}
if (lastFocusedWindow->IsDestroyed() ||
lastFocusedWindow != mLastFocusedWindow) {
MOZ_LOG(gIMELog, LogLevel::Warning,
("0x%p MaybeDispatchKeyEventAsProcessedByIME(), Warning, the "
"focused widget was destroyed/changed by a key 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() != oldCurrentContext) {
MOZ_LOG(gIMELog, LogLevel::Warning,
("0x%p MaybeDispatchKeyEventAsProcessedByIME(), Warning, the key "
"event causes changing active IM context",
this));
if (mComposingContext == oldComposingContext) {
// Only when the context is still composing, we should call
// ResetIME() here. Otherwise, it should've already been
// cleaned up.
ResetIME();
}
return false;
}
return true;
}
bool IMContextWrapper::DispatchCompositionStart(GtkIMContext* aContext) {
MOZ_LOG(gIMELog, LogLevel::Info,
("0x%p DispatchCompositionStart(aContext=0x%p)", this, aContext));
if (IsComposing()) {
MOZ_LOG(gIMELog, LogLevel::Error,
("0x%p DispatchCompositionStart(), FAILED, "
"we're already in composition",
this));
return true;
}
if (!mLastFocusedWindow) {
MOZ_LOG(gIMELog, LogLevel::Error,
("0x%p DispatchCompositionStart(), FAILED, "
"there are no focused window in this module",
this));
return false;
}
if (NS_WARN_IF(!EnsureToCacheContentSelection())) {
MOZ_LOG(gIMELog, LogLevel::Error,
("0x%p DispatchCompositionStart(), FAILED, "
"cannot query the selection offset",
this));
return false;
}
if (NS_WARN_IF(!mContentSelection->HasRange())) {
MOZ_LOG(gIMELog, LogLevel::Error,
("0x%p DispatchCompositionStart(), FAILED, "
"due to no selection",
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 = mContentSelection->OffsetAndDataRef().StartOffset();
mDispatchedCompositionString.Truncate();
// If this composition is started by a key press, we need to dispatch
// eKeyDown or eKeyUp event before dispatching eCompositionStart event.
// Note that dispatching a keyboard event which is marked as "processed
// by IME" is okay since Chromium also dispatches keyboard event as so.
if (!MaybeDispatchKeyEventAsProcessedByIME(eCompositionStart)) {
MOZ_LOG(gIMELog, LogLevel::Warning,
("0x%p DispatchCompositionStart(), Warning, "
"MaybeDispatchKeyEventAsProcessedByIME() returned false",
this));
return false;
}
RefPtr<TextEventDispatcher> dispatcher = GetTextEventDispatcher();
nsresult rv = dispatcher->BeginNativeInputTransaction();
if (NS_WARN_IF(NS_FAILED(rv))) {
MOZ_LOG(gIMELog, LogLevel::Error,
("0x%p DispatchCompositionStart(), FAILED, "
"due to BeginNativeInputTransaction() failure",
this));
return false;
}
static bool sHasSetTelemetry = false;
if (!sHasSetTelemetry) {
sHasSetTelemetry = true;
NS_ConvertUTF8toUTF16 im(GetIMName());
// 72 is kMaximumKeyStringLength in TelemetryScalar.cpp
if (im.Length() > 72) {
if (NS_IS_SURROGATE_PAIR(im[72 - 2], im[72 - 1])) {
im.Truncate(72 - 2);
} else {
im.Truncate(72 - 1);
}
// U+2026 is "..."
im.Append(char16_t(0x2026));
}
Telemetry::ScalarSet(Telemetry::ScalarID::WIDGET_IME_NAME_ON_LINUX, im,
true);
}
MOZ_LOG(gIMELog, 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(gIMELog, 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(
gIMELog, LogLevel::Info,
("0x%p DispatchCompositionChangeEvent(aContext=0x%p)", this, aContext));
if (!mLastFocusedWindow) {
MOZ_LOG(gIMELog, LogLevel::Error,
("0x%p DispatchCompositionChangeEvent(), FAILED, "
"there are no focused window in this module",
this));
return false;
}
if (!IsComposing()) {
MOZ_LOG(gIMELog, LogLevel::Debug,
("0x%p DispatchCompositionChangeEvent(), the composition "
"wasn't started, force starting...",
this));
if (!DispatchCompositionStart(aContext)) {
return false;
}
}
// If this composition string change caused by a key press, we need to
// dispatch eKeyDown or eKeyUp before dispatching eCompositionChange event.
else if (!MaybeDispatchKeyEventAsProcessedByIME(eCompositionChange)) {
MOZ_LOG(gIMELog, LogLevel::Warning,
("0x%p DispatchCompositionChangeEvent(), Warning, "
"MaybeDispatchKeyEventAsProcessedByIME() returned false",
this));
return false;
}
RefPtr<TextEventDispatcher> dispatcher = GetTextEventDispatcher();
nsresult rv = dispatcher->BeginNativeInputTransaction();
if (NS_WARN_IF(NS_FAILED(rv))) {
MOZ_LOG(gIMELog, 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(!EnsureToCacheContentSelection(
&mSelectedStringRemovedByComposition))) {
// XXX How should we behave in this case??
} else if (mContentSelection->HasRange()) {
// XXX We should assume, for now, any web applications don't change
// selection at handling this compositionchange event.
mCompositionStart = mContentSelection->OffsetAndDataRef().StartOffset();
} else {
// If there is no selection range, we should keep previously storing
// mCompositionStart.
}
}
RefPtr<TextRangeArray> rangeArray =
CreateTextRangeArray(aContext, aCompositionString);
rv = dispatcher->SetPendingComposition(aCompositionString, rangeArray);
if (NS_WARN_IF(NS_FAILED(rv))) {
MOZ_LOG(gIMELog, 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(gIMELog, LogLevel::Error,
("0x%p DispatchCompositionChangeEvent(), FAILED, "
"due to FlushPendingComposition() failure",
this));
return false;
}
if (lastFocusedWindow->IsDestroyed() ||
lastFocusedWindow != mLastFocusedWindow) {
MOZ_LOG(gIMELog, 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(gIMELog, LogLevel::Info,
("0x%p DispatchCompositionCommitEvent(aContext=0x%p, "
"aCommitString=0x%p, (\"%s\"))",
this, aContext, aCommitString,
aCommitString ? NS_ConvertUTF16toUTF8(*aCommitString).get() : ""));
if (!mLastFocusedWindow) {
MOZ_LOG(gIMELog, LogLevel::Error,
("0x%p DispatchCompositionCommitEvent(), FAILED, "
"there are no focused window in this module",
this));
return false;
}
// TODO: We need special care to handle request to commit composition
// by content while we're committing composition because we have
// commit string information now but IME may not have composition
// anymore. Therefore, we may not be able to handle commit as
// expected. However, this is rare case because this situation
// never occurs with remote content. So, it's okay to fix this
// issue later. (Perhaps, TextEventDisptcher should do it for
// all platforms. E.g., creating WillCommitComposition()?)
RefPtr<nsWindow> lastFocusedWindow(mLastFocusedWindow);
RefPtr<TextEventDispatcher> dispatcher;
if (!IsComposing() &&
!StaticPrefs::intl_ime_use_composition_events_for_insert_text()) {
if (!aCommitString || aCommitString->IsEmpty()) {
MOZ_LOG(gIMELog, LogLevel::Error,
("0x%p DispatchCompositionCommitEvent(), FAILED, "
"did nothing due to inserting empty string without composition",
this));
return true;
}
if (MOZ_UNLIKELY(!EnsureToCacheContentSelection())) {
MOZ_LOG(gIMELog, LogLevel::Warning,
("0x%p DispatchCompositionCommitEvent(), Warning, "
"Failed to cache selection before dispatching "
"eContentCommandInsertText event",
this));
}
if (!MaybeDispatchKeyEventAsProcessedByIME(eContentCommandInsertText)) {
MOZ_LOG(gIMELog, LogLevel::Warning,
("0x%p DispatchCompositionCommitEvent(), Warning, "
"MaybeDispatchKeyEventAsProcessedByIME() returned false",
this));
return false;
}
// Emulate selection until receiving actual selection range. This is
// important for OnSelectionChange. If selection is not changed by web
// apps, i.e., selection range is same as what selection expects, we
// shouldn't reset IME because the trigger of causing this commit may be an
// input for next composition and we shouldn't cancel it.
if (mContentSelection.isSome()) {
mContentSelection->Collapse(
(mContentSelection->HasRange()
? mContentSelection->OffsetAndDataRef().StartOffset()
: mCompositionStart) +
aCommitString->Length());
MOZ_LOG(gIMELog, LogLevel::Info,
("0x%p DispatchCompositionCommitEvent(), mContentSelection=%s",
this, ToString(mContentSelection).c_str()));
}
MOZ_ASSERT(!dispatcher);
} else {
if (!IsComposing()) {
if (!aCommitString || aCommitString->IsEmpty()) {
MOZ_LOG(gIMELog, LogLevel::Error,
("0x%p DispatchCompositionCommitEvent(), FAILED, "
"there is no composition and empty commit string",
this));
return true;
}
MOZ_LOG(gIMELog, LogLevel::Debug,
("0x%p DispatchCompositionCommitEvent(), "
"the composition wasn't started, force starting...",
this));
if (!DispatchCompositionStart(aContext)) {
return false;
}
}
// If this commit caused by a key press, we need to dispatch eKeyDown or
// eKeyUp before dispatching composition events.
else if (!MaybeDispatchKeyEventAsProcessedByIME(
aCommitString ? eCompositionCommit : eCompositionCommitAsIs)) {
MOZ_LOG(gIMELog, LogLevel::Warning,
("0x%p DispatchCompositionCommitEvent(), Warning, "
"MaybeDispatchKeyEventAsProcessedByIME() returned false",
this));
mCompositionState = eCompositionState_NotComposing;
return false;
}
dispatcher = GetTextEventDispatcher();
MOZ_ASSERT(dispatcher);
nsresult rv = dispatcher->BeginNativeInputTransaction();
if (NS_WARN_IF(NS_FAILED(rv))) {
MOZ_LOG(gIMELog, LogLevel::Error,
("0x%p DispatchCompositionCommitEvent(), FAILED, "
"due to BeginNativeInputTransaction() failure",
this));
return false;
}
// Emulate selection until receiving actual selection range.
const uint32_t offsetToPutCaret =
mCompositionStart + (aCommitString
? aCommitString->Length()
: mDispatchedCompositionString.Length());
if (mContentSelection.isSome()) {
mContentSelection->Collapse(offsetToPutCaret);
} else {
// TODO: We should guarantee that there should be at least fake selection
// for IME at here. Then, we can keep the last writing mode.
mContentSelection.emplace(offsetToPutCaret, WritingMode());
}
}
mCompositionState = eCompositionState_NotComposing;
// Reset dead key sequence too because GTK doesn't support dead key chain
// (i.e., a key press doesn't cause both producing some characters and
// restarting new dead key sequence at one time). So, committing
// composition means end of a dead key sequence.
mMaybeInDeadKeySequence = false;
mCompositionStart = UINT32_MAX;
mCompositionTargetRange.Clear();
mDispatchedCompositionString.Truncate();
mSelectedStringRemovedByComposition.Truncate();
if (!dispatcher) {
MOZ_ASSERT(aCommitString);
MOZ_ASSERT(!aCommitString->IsEmpty());
nsEventStatus status = nsEventStatus_eIgnore;
WidgetContentCommandEvent insertTextEvent(true, eContentCommandInsertText,
lastFocusedWindow);
insertTextEvent.mString.emplace(*aCommitString);
lastFocusedWindow->DispatchEvent(&insertTextEvent, status);
if (!insertTextEvent.mSucceeded) {
MOZ_LOG(gIMELog, LogLevel::Error,
("0x%p DispatchCompositionChangeEvent(), FAILED, inserting "
"text failed",
this));
return false;
}
} else {
nsEventStatus status = nsEventStatus_eIgnore;
nsresult rv = dispatcher->CommitComposition(status, aCommitString);
if (NS_WARN_IF(NS_FAILED(rv))) {
MOZ_LOG(gIMELog, LogLevel::Error,
("0x%p DispatchCompositionChangeEvent(), FAILED, "
"due to CommitComposition() failure",
this));
return false;
}
}
if (lastFocusedWindow->IsDestroyed() ||
lastFocusedWindow != mLastFocusedWindow) {
MOZ_LOG(gIMELog, 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(gIMELog, LogLevel::Info,
("0x%p CreateTextRangeArray(aContext=0x%p, "
"aCompositionString=\"%s\" (Length()=%zu))",
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(gIMELog, 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(gIMELog, 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(gIMELog, 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(gIMELog, 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(gIMELog, 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();
uint32_t maxOffsetOfClauses = 0;
do {
TextRange range;
if (!SetTextRange(iter, preedit_string, caretOffsetInUTF16, range)) {
continue;
}
MOZ_ASSERT(range.Length());
minOffsetOfClauses = std::min(minOffsetOfClauses, range.mStartOffset);
maxOffsetOfClauses = std::max(maxOffsetOfClauses, range.mEndOffset);
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);
maxOffsetOfClauses = std::max(maxOffsetOfClauses, dummyClause.mEndOffset);
MOZ_LOG(gIMELog, 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)));
}
// If the IME doesn't define clause at end of the composition, we should
// insert dummy clause information since TextRangeArray assumes that there
// must be a clase whose end is the length of the composition string when
// there is one or more clauses.
if (!textRangeArray->IsEmpty() &&
maxOffsetOfClauses < aCompositionString.Length()) {
TextRange dummyClause;
dummyClause.mStartOffset = maxOffsetOfClauses;
dummyClause.mEndOffset = aCompositionString.Length();
dummyClause.mRangeType = TextRangeType::eRawClause;
textRangeArray->AppendElement(dummyClause);
MOZ_LOG(gIMELog, LogLevel::Warning,
("0x%p CreateTextRangeArray(), inserting a dummy clause "
"at the end 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(
gIMELog, 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(gIMELog, 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(gIMELog, 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(gIMELog, 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(gIMELog, 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(gIMELog, 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 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(gIMELog, 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(
gIMELog, LogLevel::Info,
("0x%p SetCursorPosition(aContext=0x%p), "
"mCompositionTargetRange={ mOffset=%u, mLength=%u }, "
"mContentSelection=%s",
this, aContext, mCompositionTargetRange.mOffset,
mCompositionTargetRange.mLength, ToString(mContentSelection).c_str()));
bool useCaret = false;
if (!mCompositionTargetRange.IsValid()) {
if (mContentSelection.isNothing()) {
MOZ_LOG(gIMELog, LogLevel::Error,
("0x%p SetCursorPosition(), FAILED, "
"mCompositionTargetRange and mContentSelection are invalid",
this));
return;
}
if (!mContentSelection->HasRange()) {
MOZ_LOG(gIMELog, LogLevel::Warning,
("0x%p SetCursorPosition(), FAILED, "
"mCompositionTargetRange is invalid and there is no selection",
this));
return;
}
useCaret = true;
}
if (!mLastFocusedWindow) {
MOZ_LOG(gIMELog, LogLevel::Error,
("0x%p SetCursorPosition(), FAILED, due to no focused "
"window",
this));
return;
}
if (MOZ_UNLIKELY(!aContext)) {
MOZ_LOG(gIMELog, LogLevel::Error,
("0x%p SetCursorPosition(), FAILED, due to no context", this));
return;
}
WidgetQueryContentEvent queryCaretOrTextRectEvent(
true, useCaret ? eQueryCaretRect : eQueryTextRect, mLastFocusedWindow);
if (useCaret) {
queryCaretOrTextRectEvent.InitForQueryCaretRect(
mContentSelection->OffsetAndDataRef().StartOffset());
} else {
if (mContentSelection->WritingModeRef().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;
queryCaretOrTextRectEvent.InitForQueryTextRect(
mCompositionTargetRange.mOffset, length);
} else {
queryCaretOrTextRectEvent.InitForQueryTextRect(
mCompositionTargetRange.mOffset, 1);
}
}
nsEventStatus status;
mLastFocusedWindow->DispatchEvent(&queryCaretOrTextRectEvent, status);
if (queryCaretOrTextRectEvent.Failed()) {
MOZ_LOG(gIMELog, 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 =
queryCaretOrTextRectEvent.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(gIMELog, LogLevel::Info,
("0x%p GetCurrentParagraph(), mCompositionState=%s", this,
GetCompositionStateName()));
if (!mLastFocusedWindow) {
MOZ_LOG(gIMELog, 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(!EnsureToCacheContentSelection())) {
MOZ_LOG(gIMELog, LogLevel::Error,
("0x%p GetCurrentParagraph(), FAILED, due to no "
"valid selection information",
this));
return NS_ERROR_FAILURE;
}
if (mContentSelection.isSome() && mContentSelection->HasRange()) {
selOffset = mContentSelection->OffsetAndDataRef().StartOffset();
selLength = mContentSelection->OffsetAndDataRef().Length();
} else {
// If there is no range, let's get all text instead...
selOffset = 0u;
selLength = INT32_MAX; // TODO: Change to UINT32_MAX, but see below
}
}
MOZ_LOG(gIMELog, 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(gIMELog, 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);
if (NS_WARN_IF(queryTextContentEvent.Failed())) {
return NS_ERROR_FAILURE;
}
if (selOffset + selLength > queryTextContentEvent.mReply->DataLength()) {
MOZ_LOG(gIMELog, LogLevel::Error,
("0x%p GetCurrentParagraph(), FAILED, The selection is "
"invalid, queryTextContentEvent={ mReply=%s }",
this, ToString(queryTextContentEvent.mReply).c_str()));
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.
nsAutoString textContent(queryTextContentEvent.mReply->DataRef());
if (EditorHasCompositionString() &&
mDispatchedCompositionString != mSelectedStringRemovedByComposition) {
textContent.Replace(mCompositionStart,
mDispatchedCompositionString.Length(),
mSelectedStringRemovedByComposition);
}
// Get only the focused paragraph, by looking for newlines
int32_t parStart = 0;
if (selOffset > 0) {
parStart = Substring(textContent, 0, selOffset - 1).RFind(u"\n") + 1;
}
int32_t parEnd = textContent.Find(u"\n", selOffset + selLength);
if (parEnd < 0) {
parEnd = textContent.Length();
}
aText = nsDependentSubstring(textContent, parStart, parEnd - parStart);
aCursorPos = selOffset - uint32_t(parStart);
MOZ_LOG(
gIMELog, LogLevel::Debug,
("0x%p GetCurrentParagraph(), succeeded, aText=%s, "
"aText.Length()=%zu, 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(gIMELog, LogLevel::Info,
("0x%p DeleteText(aContext=0x%p, aOffset=%d, aNChars=%u), "
"mCompositionState=%s",
this, aContext, aOffset, aNChars, GetCompositionStateName()));
if (!mLastFocusedWindow) {
MOZ_LOG(gIMELog, LogLevel::Error,
("0x%p DeleteText(), FAILED, there are no focused window "
"in this module",
this));
return NS_ERROR_NULL_POINTER;
}
if (!aNChars) {
MOZ_LOG(gIMELog, 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(gIMELog, LogLevel::Error,
("0x%p DeleteText(), FAILED, quitting from DeletText", this));
return NS_ERROR_FAILURE;
}
} else {
if (NS_WARN_IF(!EnsureToCacheContentSelection())) {
MOZ_LOG(gIMELog, LogLevel::Error,
("0x%p DeleteText(), FAILED, due to no valid selection "
"information",
this));
return NS_ERROR_FAILURE;
}
if (!mContentSelection->HasRange()) {
MOZ_LOG(gIMELog, LogLevel::Debug,
("0x%p DeleteText(), does nothing, due to no selection range",
this));
return NS_OK;
}
selOffset = mContentSelection->OffsetAndDataRef().StartOffset();
}
// Get all text contents of the focused editor
WidgetQueryContentEvent queryTextContentEvent(true, eQueryTextContent,
mLastFocusedWindow);
queryTextContentEvent.InitForQueryTextContent(0, UINT32_MAX);
mLastFocusedWindow->DispatchEvent(&queryTextContentEvent, status);
if (NS_WARN_IF(queryTextContentEvent.Failed())) {
return NS_ERROR_FAILURE;
}
if (queryTextContentEvent.mReply->IsDataEmpty()) {
MOZ_LOG(gIMELog, LogLevel::Error,
("0x%p DeleteText(), FAILED, there is no contents", this));
return NS_ERROR_FAILURE;
}
NS_ConvertUTF16toUTF8 utf8Str(nsDependentSubstring(
queryTextContentEvent.mReply->DataRef(), 0, selOffset));
glong offsetInUTF8Characters =
g_utf8_strlen(utf8Str.get(), utf8Str.Length()) + aOffset;
if (offsetInUTF8Characters < 0) {
MOZ_LOG(gIMELog, 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->DataRef(), selOffset),
utf8Str);
glong countOfCharactersInUTF8 =
g_utf8_strlen(utf8Str.get(), utf8Str.Length());
glong endInUTF8Characters = offsetInUTF8Characters + aNChars;
if (countOfCharactersInUTF8 < endInUTF8Characters) {
MOZ_LOG(gIMELog, 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(gIMELog, LogLevel::Error,
("0x%p DeleteText(), FAILED, setting selection caused "
"focus change or window destroyed",
this));
return NS_ERROR_FAILURE;
}
// If this deleting text caused by a key press, we need to dispatch
// eKeyDown or eKeyUp before dispatching eContentCommandDelete event.
if (!MaybeDispatchKeyEventAsProcessedByIME(eContentCommandDelete)) {
MOZ_LOG(gIMELog, LogLevel::Warning,
("0x%p DeleteText(), Warning, "
"MaybeDispatchKeyEventAsProcessedByIME() returned false",
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(gIMELog, 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(
gIMELog, 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(
gIMELog, LogLevel::Error,
("0x%p DeleteText(), FAILED, restoring composition string", this));
return NS_ERROR_FAILURE;
}
return NS_OK;
}
bool IMContextWrapper::EnsureToCacheContentSelection(
nsAString* aSelectedString) {
if (aSelectedString) {
aSelectedString->Truncate();
}
if (mContentSelection.isSome()) {
if (mContentSelection->HasRange() && aSelectedString) {
aSelectedString->Assign(mContentSelection->OffsetAndDataRef().DataRef());
}
return true;
}
RefPtr<nsWindow> dispatcherWindow =
mLastFocusedWindow ? mLastFocusedWindow : mOwnerWindow;
if (NS_WARN_IF(!dispatcherWindow)) {
MOZ_LOG(gIMELog, LogLevel::Error,
("0x%p EnsureToCacheContentSelection(), FAILED, due to "
"no focused window",
this));
return false;
}
nsEventStatus status;
WidgetQueryContentEvent querySelectedTextEvent(true, eQuerySelectedText,
dispatcherWindow);
dispatcherWindow->DispatchEvent(&querySelectedTextEvent, status);
if (NS_WARN_IF(querySelectedTextEvent.Failed())) {
MOZ_LOG(gIMELog, LogLevel::Error,
("0x%p EnsureToCacheContentSelection(), FAILED, due to "
"failure of query selection event",
this));
return false;
}
mContentSelection = Some(ContentSelection(querySelectedTextEvent));
if (mContentSelection->HasRange()) {
if (!mContentSelection->OffsetAndDataRef().IsDataEmpty() &&
aSelectedString) {
aSelectedString->Assign(querySelectedTextEvent.mReply->DataRef());
}
}
MOZ_LOG(
gIMELog, LogLevel::Debug,
("0x%p EnsureToCacheContentSelection(), Succeeded, mContentSelection=%s",
this, ToString(mContentSelection).c_str()));
return true;
}
} // namespace widget
} // namespace mozilla
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