diff options
Diffstat (limited to 'widget/gtk/IMContextWrapper.cpp')
| -rw-r--r-- | widget/gtk/IMContextWrapper.cpp | 3358 |
1 files changed, 3358 insertions, 0 deletions
diff --git a/widget/gtk/IMContextWrapper.cpp b/widget/gtk/IMContextWrapper.cpp new file mode 100644 index 0000000000..fc87acbf86 --- /dev/null +++ b/widget/gtk/IMContextWrapper.cpp @@ -0,0 +1,3358 @@ +/* -*- 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 "GRefPtr.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; + } + + // mContainer associated with an IM context. + void AttachTo(MozContainer* aContainer) { + gtk_style_context_add_provider( + gtk_widget_get_style_context(GTK_WIDGET(aContainer)), + 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() { + // 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( + mOwnerWindow->GetMozContainer()); + + // 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(); + 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(); + 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(); + + 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() { + MOZ_ASSERT(!mContext); + MOZ_ASSERT(!mComposingContext); + if (this == sLastFocusedContext) { + sLastFocusedContext = nullptr; + } + MOZ_LOG(gIMELog, LogLevel::Info, ("0x%p ~IMContextWrapper()", this)); +} + +void IMContextWrapper::SetGdkWindow(GdkWindow* aGdkWindow) { + MOZ_LOG(gIMELog, LogLevel::Info, + ("0x%p GdkWindowChanged(%p)", this, aGdkWindow)); + MOZ_ASSERT(!aGdkWindow || mOwnerWindow->GetGdkWindow() == aGdkWindow); + gtk_im_context_set_client_window(mContext, aGdkWindow); + if (mSimpleContext) { + gtk_im_context_set_client_window(mSimpleContext, aGdkWindow); + } + gtk_im_context_set_client_window(mDummyContext, aGdkWindow); +} + +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 disconnect from 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_signal_handlers_disconnect_by_data(mContext, this); + g_object_unref(mContext); + mContext = nullptr; + } + + if (mSimpleContext) { + gtk_im_context_set_client_window(mSimpleContext, nullptr); + g_signal_handlers_disconnect_by_data(mSimpleContext, this); + 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) { + RefPtr module = aModule; + module->OnChangeCompositionNative(aContext); + + if (module->IsDestroyed()) { + // A strong reference is already held during "preedit-changed" emission, + // but _ibus_context_destroy_cb() in ibus 1.5.28 and + // _fcitx_im_context_close_im_cb() in fcitx 4.2.9.9 want their + // GtkIMContexts to live a little longer. See bug 1824634. + NS_DispatchToMainThread( + NS_NewRunnableFunction(__func__, [context = RefPtr{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 |