/**************************************************************************** ** ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). ** Contact: Nokia Corporation (qt-info@nokia.com) ** ** This file is part of the QtGui module of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:LGPL$ ** No Commercial Usage ** This file contains pre-release code and may not be distributed. ** You may use this file in accordance with the terms and conditions ** contained in the Technology Preview License Agreement accompanying ** this package. ** ** GNU Lesser General Public License Usage ** Alternatively, this file may be used under the terms of the GNU Lesser ** General Public License version 2.1 as published by the Free Software ** Foundation and appearing in the file LICENSE.LGPL included in the ** packaging of this file. Please review the following information to ** ensure the GNU Lesser General Public License version 2.1 requirements ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. ** ** In addition, as a special exception, Nokia gives you certain ** additional rights. These rights are described in the Nokia Qt LGPL ** Exception version 1.1, included in the file LGPL_EXCEPTION.txt in this ** package. ** ** If you have questions regarding the use of this file, please contact ** Nokia at qt-info@nokia.com. ** ** ** ** ** ** ** ** ** $QT_END_LICENSE$ ** ****************************************************************************/ /**************************************************************************** ** ** Implementation of QXIMInputContext class ** ** Copyright (C) 2003-2004 immodule for Qt Project. All rights reserved. ** ** This file is written to contribute to Nokia Corporation and/or its subsidiary(-ies) under their own ** license. You may use this file under your Qt license. Following ** description is copied from their original file headers. Contact ** immodule-qt@freedesktop.org if any conditions of this licensing are ** not clear to you. ** ****************************************************************************/ #include "qdebug.h" #include "qximinputcontext_p.h" #if !defined(QT_NO_IM) QT_BEGIN_NAMESPACE #if !defined(QT_NO_XIM) QT_BEGIN_INCLUDE_NAMESPACE #include "qplatformdefs.h" #include "qapplication.h" #include "qwidget.h" #include "qstring.h" #include "qlist.h" #include "qtextcodec.h" #include "qevent.h" #include "qtextformat.h" #include "qx11info_x11.h" #include #include QT_END_INCLUDE_NAMESPACE // #define QT_XIM_DEBUG #ifdef QT_XIM_DEBUG #define XIM_DEBUG qDebug #else #define XIM_DEBUG if (0) qDebug #endif // from qapplication_x11.cpp // #### move to X11 struct extern XIMStyle qt_xim_preferred_style; extern char *qt_ximServer; extern int qt_ximComposingKeycode; extern QTextCodec * qt_input_mapper; XIMStyle QXIMInputContext::xim_style = 0; // moved from qapplication_x11.cpp static const XIMStyle xim_default_style = XIMPreeditCallbacks | XIMStatusNothing; extern "C" { #ifdef USE_X11R6_XIM static void xim_create_callback(XIM /*im*/, XPointer client_data, XPointer /*call_data*/) { QXIMInputContext *qic = reinterpret_cast(client_data); // qDebug("xim_create_callback"); qic->create_xim(); } static void xim_destroy_callback(XIM /*im*/, XPointer client_data, XPointer /*call_data*/) { QXIMInputContext *qic = reinterpret_cast(client_data); // qDebug("xim_destroy_callback"); qic->close_xim(); XRegisterIMInstantiateCallback(X11->display, 0, 0, 0, (XIMProc) xim_create_callback, reinterpret_cast(qic)); } #endif // USE_X11R6_XIM static int xic_start_callback(XIC, XPointer client_data, XPointer) { QXIMInputContext *qic = (QXIMInputContext *) client_data; if (!qic) { XIM_DEBUG("xic_start_callback: no qic"); return 0; } QXIMInputContext::ICData *data = qic->icData(); if (!data) { XIM_DEBUG("xic_start_callback: no ic data"); return 0; } XIM_DEBUG("xic_start_callback"); data->clear(); data->composing = true; return 0; } static int xic_draw_callback(XIC, XPointer client_data, XPointer call_data) { QXIMInputContext *qic = (QXIMInputContext *) client_data; if (!qic) { XIM_DEBUG("xic_draw_callback: no qic"); return 0; } QXIMInputContext::ICData *data = qic->icData(); if (!data) { XIM_DEBUG("xic_draw_callback: no ic data"); return 0; } XIM_DEBUG("xic_draw_callback"); if(!data->composing) { data->clear(); data->composing = true; } XIMPreeditDrawCallbackStruct *drawstruct = (XIMPreeditDrawCallbackStruct *) call_data; XIMText *text = (XIMText *) drawstruct->text; int cursor = drawstruct->caret, sellen = 0, selstart = 0; if (!drawstruct->caret && !drawstruct->chg_first && !drawstruct->chg_length && !text) { if(data->text.isEmpty()) { XIM_DEBUG("compose emptied"); // if the composition string has been emptied, we need // to send an InputMethodEnd event QInputMethodEvent e; qic->sendEvent(e); data->clear(); // if the commit string has coming after here, InputMethodStart // will be sent dynamically } return 0; } if (text) { char *str = 0; if (text->encoding_is_wchar) { int l = wcstombs(NULL, text->string.wide_char, text->length); if (l != -1) { str = new char[l + 1]; wcstombs(str, text->string.wide_char, l); str[l] = 0; } } else str = text->string.multi_byte; if (!str) return 0; QString s = QString::fromLocal8Bit(str); if (text->encoding_is_wchar) delete [] str; if (drawstruct->chg_length < 0) data->text.replace(drawstruct->chg_first, INT_MAX, s); else data->text.replace(drawstruct->chg_first, drawstruct->chg_length, s); if (data->selectedChars.size() < data->text.length()) { // expand the selectedChars array if the compose string is longer int from = data->selectedChars.size(); data->selectedChars.resize(data->text.length()); for (int x = from; x < data->selectedChars.size(); ++x) data->selectedChars.clearBit(x); } // determine if the changed chars are selected based on text->feedback for (int x = 0; x < text->length; ++x) data->selectedChars.setBit(x + drawstruct->chg_first, (text->feedback ? (text->feedback[x] & XIMReverse) : 0)); // figure out where the selection starts, and how long it is bool started = false; for (int x = 0; x < qMin(data->selectedChars.size(), data->text.length()); ++x) { if (started) { if (data->selectedChars.testBit(x)) ++sellen; else break; } else { if (data->selectedChars.testBit(x)) { selstart = x; started = true; sellen = 1; } } } } else { if (drawstruct->chg_length == 0) drawstruct->chg_length = -1; data->text.remove(drawstruct->chg_first, drawstruct->chg_length); bool qt_compose_emptied = data->text.isEmpty(); if (qt_compose_emptied) { XIM_DEBUG("compose emptied 2 text=%s", data->text.toUtf8().constData()); // if the composition string has been emptied, we need // to send an InputMethodEnd event QInputMethodEvent e; qic->sendEvent(e); data->clear(); // if the commit string has coming after here, InputMethodStart // will be sent dynamically return 0; } } XIM_DEBUG("sending compose: '%s', cursor=%d, sellen=%d", data->text.toUtf8().constData(), cursor, sellen); QList attrs; if (selstart > 0) attrs << QInputMethodEvent::Attribute(QInputMethodEvent::TextFormat, 0, selstart, qic->standardFormat(QInputContext::PreeditFormat)); if (sellen) attrs << QInputMethodEvent::Attribute(QInputMethodEvent::TextFormat, selstart, sellen, qic->standardFormat(QInputContext::SelectionFormat)); if (selstart + sellen < data->text.length()) attrs << QInputMethodEvent::Attribute(QInputMethodEvent::TextFormat, selstart + sellen, data->text.length() - selstart - sellen, qic->standardFormat(QInputContext::PreeditFormat)); attrs << QInputMethodEvent::Attribute(QInputMethodEvent::Cursor, cursor, sellen ? 0 : 1, QVariant()); QInputMethodEvent e(data->text, attrs); data->preeditEmpty = data->text.isEmpty(); qic->sendEvent(e); return 0; } static int xic_done_callback(XIC, XPointer client_data, XPointer) { QXIMInputContext *qic = (QXIMInputContext *) client_data; if (!qic) return 0; XIM_DEBUG("xic_done_callback"); // Don't send InputMethodEnd here. QXIMInputContext::x11FilterEvent() // handles InputMethodEnd with commit string. return 0; } } void QXIMInputContext::ICData::clear() { text = QString(); selectedChars.clear(); composing = false; preeditEmpty = true; } QXIMInputContext::ICData *QXIMInputContext::icData() const { if (QWidget *w = focusWidget()) return ximData.value(w->effectiveWinId()); return 0; } /* The cache here is needed, as X11 leaks a few kb for every XFreeFontSet call, so we avoid creating and deletion of fontsets as much as possible */ static XFontSet fontsetCache[8] = { 0, 0, 0, 0, 0, 0, 0, 0 }; static int fontsetRefCount = 0; static const char * const fontsetnames[] = { "-*-fixed-medium-r-*-*-16-*,-*-*-medium-r-*-*-16-*", "-*-fixed-medium-i-*-*-16-*,-*-*-medium-i-*-*-16-*", "-*-fixed-bold-r-*-*-16-*,-*-*-bold-r-*-*-16-*", "-*-fixed-bold-i-*-*-16-*,-*-*-bold-i-*-*-16-*", "-*-fixed-medium-r-*-*-24-*,-*-*-medium-r-*-*-24-*", "-*-fixed-medium-i-*-*-24-*,-*-*-medium-i-*-*-24-*", "-*-fixed-bold-r-*-*-24-*,-*-*-bold-r-*-*-24-*", "-*-fixed-bold-i-*-*-24-*,-*-*-bold-i-*-*-24-*" }; static XFontSet getFontSet(const QFont &f) { int i = 0; if (f.italic()) i |= 1; if (f.bold()) i |= 2; if (f.pointSize() > 20) i += 4; if (!fontsetCache[i]) { Display* dpy = X11->display; int missCount; char** missList; fontsetCache[i] = XCreateFontSet(dpy, fontsetnames[i], &missList, &missCount, 0); if(missCount > 0) XFreeStringList(missList); if (!fontsetCache[i]) { fontsetCache[i] = XCreateFontSet(dpy, "-*-fixed-*-*-*-*-16-*", &missList, &missCount, 0); if(missCount > 0) XFreeStringList(missList); if (!fontsetCache[i]) fontsetCache[i] = (XFontSet)-1; } } return (fontsetCache[i] == (XFontSet)-1) ? 0 : fontsetCache[i]; } QXIMInputContext::QXIMInputContext() { if (!qt_xim_preferred_style) // no configured input style, use the default qt_xim_preferred_style = xim_default_style; xim = 0; QByteArray ximServerName(qt_ximServer); if (qt_ximServer) ximServerName.prepend("@im="); else ximServerName = ""; if (!XSupportsLocale()) #ifndef QT_NO_DEBUG qWarning("Qt: Locale not supported on X server") #endif ; #ifdef USE_X11R6_XIM else if (XSetLocaleModifiers (ximServerName.constData()) == 0) qWarning("Qt: Cannot set locale modifiers: %s", ximServerName.constData()); else XRegisterIMInstantiateCallback(X11->display, 0, 0, 0, (XIMProc) xim_create_callback, reinterpret_cast(this)); #else // !USE_X11R6_XIM else if (XSetLocaleModifiers ("") == 0) qWarning("Qt: Cannot set locale modifiers"); else QXIMInputContext::create_xim(); #endif // USE_X11R6_XIM } /*!\internal Creates the application input method. */ void QXIMInputContext::create_xim() { ++fontsetRefCount; #ifndef QT_NO_XIM xim = XOpenIM(X11->display, 0, 0, 0); if (xim) { #ifdef USE_X11R6_XIM XIMCallback destroy; destroy.callback = (XIMProc) xim_destroy_callback; destroy.client_data = XPointer(this); if (XSetIMValues(xim, XNDestroyCallback, &destroy, (char *) 0) != 0) qWarning("Xlib doesn't support destroy callback"); #endif // USE_X11R6_XIM XIMStyles *styles = 0; XGetIMValues(xim, XNQueryInputStyle, &styles, (char *) 0, (char *) 0); if (styles) { int i; for (i = 0; !xim_style && i < styles->count_styles; i++) { if (styles->supported_styles[i] == qt_xim_preferred_style) { xim_style = qt_xim_preferred_style; break; } } // if the preferred input style couldn't be found, look for // Nothing for (i = 0; !xim_style && i < styles->count_styles; i++) { if (styles->supported_styles[i] == (XIMPreeditNothing | XIMStatusNothing)) { xim_style = XIMPreeditNothing | XIMStatusNothing; break; } } // ... and failing that, None. for (i = 0; !xim_style && i < styles->count_styles; i++) { if (styles->supported_styles[i] == (XIMPreeditNone | XIMStatusNone)) { xim_style = XIMPreeditNone | XIMStatusNone; break; } } // qDebug("QApplication: using im style %lx", xim_style); XFree((char *)styles); } if (xim_style) { #ifdef USE_X11R6_XIM XUnregisterIMInstantiateCallback(X11->display, 0, 0, 0, (XIMProc) xim_create_callback, reinterpret_cast(this)); #endif // USE_X11R6_XIM if (QWidget *focusWidget = QApplication::focusWidget()) { // reinitialize input context after the input method // server (like SCIM) has been launched without // requiring the user to manually switch focus. if (focusWidget->testAttribute(Qt::WA_InputMethodEnabled) && focusWidget->testAttribute(Qt::WA_WState_Created)) setFocusWidget(focusWidget); } // following code fragment is not required for immodule // version of XIM #if 0 QWidgetList list = qApp->topLevelWidgets(); for (int i = 0; i < list.size(); ++i) { QWidget *w = list.at(i); w->d->createTLSysExtra(); } #endif } else { // Give up qWarning("No supported input style found." " See InputMethod documentation."); close_xim(); } } #endif // QT_NO_XIM } /*!\internal Closes the application input method. */ void QXIMInputContext::close_xim() { for(QHash::const_iterator i = ximData.constBegin(), e = ximData.constEnd(); i != e; ++i) { ICData *data = i.value(); if (data->ic) XDestroyIC(data->ic); delete data; } ximData.clear(); if ( --fontsetRefCount == 0 ) { Display *dpy = X11->display; for ( int i = 0; i < 8; i++ ) { if ( fontsetCache[i] && fontsetCache[i] != (XFontSet)-1 ) { XFreeFontSet(dpy, fontsetCache[i]); fontsetCache[i] = 0; } } } setFocusWidget(0); xim = 0; } QXIMInputContext::~QXIMInputContext() { XIM old_xim = xim; // close_xim clears xim pointer. close_xim(); if (old_xim) XCloseIM(old_xim); } QString QXIMInputContext::identifierName() { // the name should be "xim" rather than "XIM" to be consistent // with corresponding immodule of GTK+ return QLatin1String("xim"); } QString QXIMInputContext::language() { QString language; if (xim) { QByteArray locale(XLocaleOfIM(xim)); if (locale.startsWith("zh")) { // Chinese language should be formed as "zh_CN", "zh_TW", "zh_HK" language = QLatin1String(locale.left(5)); } else { // other languages should be two-letter ISO 639 language code language = QLatin1String(locale.left(2)); } } return language; } void QXIMInputContext::reset() { QWidget *w = focusWidget(); if (!w) return; ICData *data = ximData.value(w->effectiveWinId()); if (!data) return; if (data->ic) { char *mb = XmbResetIC(data->ic); QInputMethodEvent e; if (mb) { e.setCommitString(QString::fromLocal8Bit(mb)); XFree(mb); data->preeditEmpty = false; // force sending an event } if (!data->preeditEmpty) { sendEvent(e); update(); } } data->clear(); } void QXIMInputContext::widgetDestroyed(QWidget *w) { QInputContext::widgetDestroyed(w); ICData *data = ximData.take(w->effectiveWinId()); if (!data) return; data->clear(); if (data->ic) XDestroyIC(data->ic); delete data; } void QXIMInputContext::mouseHandler(int pos, QMouseEvent *e) { if(e->type() != QEvent::MouseButtonPress) return; XIM_DEBUG("QXIMInputContext::mouseHandler pos=%d", pos); if (QWidget *w = focusWidget()) { ICData *data = ximData.value(w->effectiveWinId()); if (!data) return; if (pos < 0 || pos > data->text.length()) reset(); // ##### handle mouse position } } bool QXIMInputContext::isComposing() const { QWidget *w = focusWidget(); if (!w) return false; ICData *data = ximData.value(w->effectiveWinId()); if (!data) return false; return data->composing; } void QXIMInputContext::setFocusWidget(QWidget *w) { if (!xim) return; QWidget *oldFocus = focusWidget(); if (oldFocus == w) return; if (language() != QLatin1String("ja")) reset(); if (oldFocus) { ICData *data = ximData.value(oldFocus->effectiveWinId()); if (data && data->ic) XUnsetICFocus(data->ic); } QInputContext::setFocusWidget(w); if (!w) return; ICData *data = ximData.value(w->effectiveWinId()); if (!data) data = createICData(w); if (data->ic) XSetICFocus(data->ic); update(); } bool QXIMInputContext::x11FilterEvent(QWidget *keywidget, XEvent *event) { int xkey_keycode = event->xkey.keycode; if (!keywidget->testAttribute(Qt::WA_WState_Created)) return false; if (XFilterEvent(event, keywidget->effectiveWinId())) { qt_ximComposingKeycode = xkey_keycode; // ### not documented in xlib update(); return true; } if (event->type != XKeyPress || event->xkey.keycode != 0) return false; QWidget *w = focusWidget(); if (keywidget != w) return false; ICData *data = ximData.value(w->effectiveWinId()); if (!data) return false; // input method has sent us a commit string QByteArray string; string.resize(513); KeySym key; // unused Status status; // unused QString text; int count = XmbLookupString(data->ic, &event->xkey, string.data(), string.size(), &key, &status); if (status == XBufferOverflow) { string.resize(count + 1); count = XmbLookupString(data->ic, &event->xkey, string.data(), string.size(), &key, &status); } if (count > 0) { // XmbLookupString() gave us some text, convert it to unicode text = qt_input_mapper->toUnicode(string.constData() , count); if (text.isEmpty()) { // codec couldn't convert to unicode? this can happen when running in the // C locale (or with no LANG set). try converting from latin-1 text = QString::fromLatin1(string.constData(), count); } } #if 0 if (!(xim_style & XIMPreeditCallbacks) || !isComposing()) { // ############### send a regular key event here! ; } #endif QInputMethodEvent e; e.setCommitString(text); sendEvent(e); data->clear(); update(); return true; } QXIMInputContext::ICData *QXIMInputContext::createICData(QWidget *w) { ICData *data = new ICData; data->widget = w; data->preeditEmpty = true; XVaNestedList preedit_attr = 0; XIMCallback startcallback, drawcallback, donecallback; QFont font = w->font(); data->fontset = getFontSet(font); if (xim_style & XIMPreeditArea) { XRectangle rect; rect.x = 0; rect.y = 0; rect.width = w->width(); rect.height = w->height(); preedit_attr = XVaCreateNestedList(0, XNArea, &rect, XNFontSet, data->fontset, (char *) 0); } else if (xim_style & XIMPreeditPosition) { XPoint spot; spot.x = 1; spot.y = 1; preedit_attr = XVaCreateNestedList(0, XNSpotLocation, &spot, XNFontSet, data->fontset, (char *) 0); } else if (xim_style & XIMPreeditCallbacks) { startcallback.client_data = (XPointer) this; startcallback.callback = (XIMProc) xic_start_callback; drawcallback.client_data = (XPointer) this; drawcallback.callback = (XIMProc)xic_draw_callback; donecallback.client_data = (XPointer) this; donecallback.callback = (XIMProc) xic_done_callback; preedit_attr = XVaCreateNestedList(0, XNPreeditStartCallback, &startcallback, XNPreeditDrawCallback, &drawcallback, XNPreeditDoneCallback, &donecallback, (char *) 0); } if (preedit_attr) { data->ic = XCreateIC(xim, XNInputStyle, xim_style, XNClientWindow, w->effectiveWinId(), XNPreeditAttributes, preedit_attr, (char *) 0); XFree(preedit_attr); } else { data->ic = XCreateIC(xim, XNInputStyle, xim_style, XNClientWindow, w->effectiveWinId(), (char *) 0); } if (data->ic) { // when resetting the input context, preserve the input state (void) XSetICValues(data->ic, XNResetState, XIMPreserveState, (char *) 0); } else { qWarning("Failed to create XIC"); } ximData[w->effectiveWinId()] = data; return data; } void QXIMInputContext::update() { QWidget *w = focusWidget(); if (!w) return; ICData *data = ximData.value(w->effectiveWinId()); if (!data || !data->ic) return; QRect r = w->inputMethodQuery(Qt::ImMicroFocus).toRect(); QPoint p; if (w->nativeParentWidget()) p = w->mapTo(w->nativeParentWidget(), QPoint((r.left() + r.right() + 1)/2, r.bottom())); else p = QPoint((r.left() + r.right() + 1)/2, r.bottom()); XPoint spot; spot.x = p.x(); spot.y = p.y(); r = w->rect(); XRectangle area; area.x = r.x(); area.y = r.y(); area.width = r.width(); area.height = r.height(); XFontSet fontset = getFontSet(qvariant_cast(w->inputMethodQuery(Qt::ImFont))); if (data->fontset == fontset) fontset = 0; else data->fontset = fontset; XVaNestedList preedit_attr; if (fontset) preedit_attr = XVaCreateNestedList(0, XNSpotLocation, &spot, XNArea, &area, XNFontSet, fontset, (char *) 0); else preedit_attr = XVaCreateNestedList(0, XNSpotLocation, &spot, XNArea, &area, (char *) 0); XSetICValues(data->ic, XNPreeditAttributes, preedit_attr, (char *) 0); XFree(preedit_attr); } #else /* When QT_NO_XIM is defined, we provide a dummy implementation for this class. The reason for this is that the header file is moc'ed regardless of QT_NO_XIM. The best would be to remove the file completely from the pri file is QT_NO_XIM was defined, or for moc to understand this preprocessor directive. Since the header does not declare this class when QT_NO_XIM is defined, this is dead code. */ bool QXIMInputContext::isComposing() const { return false; } QString QXIMInputContext::identifierName() { return QString(); } void QXIMInputContext::mouseHandler(int, QMouseEvent *) {} void QXIMInputContext::setFocusWidget(QWidget *) {} void QXIMInputContext::reset() {} void QXIMInputContext::update() {} QXIMInputContext::~QXIMInputContext() {} void QXIMInputContext::widgetDestroyed(QWidget *) {} QString QXIMInputContext::language() { return QString(); } bool QXIMInputContext::x11FilterEvent(QWidget *, XEvent *) { return true; } #endif //QT_NO_XIM QT_END_NAMESPACE #endif //QT_NO_IM