qt4/ibus-input-context.cpp

   1 /* vim:set noet ts=4: */
   2 /*
   3  * ibus - The Input Bus
   4  *
   5  * Copyright (c) 2007-2008 Huang Peng <shawn.p.huang@gmail.com>
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this program; if not, write to the
  19  * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  20  * Boston, MA  02111-1307  USA
  21  */
  22 #include "ibus-input-context.h"
  23 #include "ibus-client.h"
  24 #include <QtDebug>
  25 #include <QInputMethodEvent>
  26 #include <QTextCharFormat>
  27
  28 typedef QInputMethodEvent::Attribute QAttribute;
  29
  30 IBusInputContext::IBusInputContext (QObject *parent, IBusClient *client, QString &ic)
  31         : QInputContext (parent), client (client), ic (ic), preedit_visible (false)
  32 {
  33 }
  34
  35 IBusInputContext::~IBusInputContext ()
  36 {
  37         client->releaseInputContext (this);
  38 }
  39
  40 bool
  41 IBusInputContext::filterEvent (const QEvent *event)
  42 {
  43 #ifndef Q_WS_X11
  44         if (client->filterEvent (this, event))
  45                 return true;
  46         return QInputContext::filterEvent (event);
  47 #else
  48         return QInputContext::filterEvent (event);
  49 #endif
  50 }
  51
  52 QFont
  53 IBusInputContext::font () const
  54 {
  55         return QInputContext::font ();
  56 }
  57
  58 QString
  59 IBusInputContext::identifierName ()
  60 {
  61         return QString ("ibus");
  62 }
  63
  64 QString
  65 IBusInputContext::language()
  66 {
  67         return QString ("");
  68 }
  69
  70 void
  71 IBusInputContext::mouseHandler (int x, QMouseEvent *event)
  72 {
  73         client->mouseHandler (this, x, event);
  74         QInputContext::mouseHandler (x, event);
  75 }
  76
  77 void
  78 IBusInputContext::reset()
  79 {
  80         client->reset (this);
  81 }
  82
  83 void
  84 IBusInputContext::update ()
  85 {
  86         QWidget *widget;
  87
  88         if ((widget = focusWidget ()) == NULL)
  89                 return;
  90
  91         QRect rect = widget->inputMethodQuery(Qt::ImMicroFocus).toRect ();
  92
  93 #if 0
  94         QFont font = widget->inputMethodQuery(Qt::ImFont).value <QFont> ();
  95         qDebug () << rect << preedit_string << preedit_cursor_pos;
  96
  97         QFontMetrics fm(font);
  98         int textWidth = fm.width (preedit_string.left (preedit_cursor_pos));
  99         rect.translate (textWidth, 0);
 100 #endif
 101
 102         QPoint topleft = widget->mapToGlobal(QPoint(0,0));
 103         rect.translate (topleft);
 104         if (cursor_location != rect ) {
 105                 client->setCursorLocation (this, rect);
 106                 cursor_location = rect;
 107         }
 108
 109 #if 0
 110         QVariant value;
 111         value = widget->inputMethodQuery(Qt::ImMicroFocus);
 112         qDebug () << value;
 113         value = widget->inputMethodQuery(Qt::ImFont);
 114         qDebug () << value;
 115         value = widget->inputMethodQuery(Qt::ImCursorPosition);
 116         qDebug () << value;
 117         value = widget->inputMethodQuery(Qt::ImSurroundingText);
 118         qDebug () << value;
 119         value = widget->inputMethodQuery(Qt::ImCurrentSelection);
 120         qDebug () << value;
 121 #endif
 122 }
 123
 124 bool
 125 IBusInputContext::isComposing() const
 126 {
 127         return (!preedit_string.isEmpty ()) && preedit_visible;
 128 }
 129
 130 void
 131 IBusInputContext::setFocusWidget (QWidget *widget)
 132 {
 133         // qDebug () << "setFocusWidget (" << widget << ")";
 134         QInputContext::setFocusWidget (widget);
 135         update ();
 136 }
 137
 138 void
 139 IBusInputContext::widgetDestroyed (QWidget *widget)
 140 {
 141         QInputContext::widgetDestroyed (widget);
 142         update ();
 143 }
 144
 145 #ifdef Q_WS_X11
 146 bool
 147 IBusInputContext::x11FilterEvent (QWidget *keywidget, XEvent *xevent)
 148 {
 149         if (client->x11FilterEvent (this, keywidget, xevent))
 150                 return true;
 151         return QInputContext::x11FilterEvent (keywidget, xevent);
 152 }
 153 #endif
 154
 155 void
 156 IBusInputContext::setIC (QString ic)
 157 {
 158         this->ic = ic;
 159 }
 160
 161 QString
 162 IBusInputContext::getIC ()
 163 {
 164         return ic;
 165 }
 166
 167 void
 168 IBusInputContext::commitString (QString text)
 169 {
 170         QInputMethodEvent event;
 171         event.setCommitString (text);
 172         sendEvent (event);
 173         update ();
 174 }
 175
 176 void
 177 IBusInputContext::updatePreedit (QString text, QList <QList <quint32> > attr_list, int cursor_pos, bool show)
 178 {
 179         // qDebug () << text << cursor_pos << show;
 180         QList <QAttribute> qattrs;
 181
 182         if (show) {
 183                 // append cursor pos
 184                 qattrs.append (QAttribute (QInputMethodEvent::Cursor, cursor_pos, true, 0));
 185
 186                 // append attributes
 187                 for (QList <QList <quint32> >::iterator it = attr_list.begin (); it != attr_list.end(); ++ it) {
 188
 189                         QList <quint32> attr = *it;
 190                         QTextCharFormat format;
 191
 192                         switch (attr[0]) {
 193                         case 1: // underline
 194                                 format.setUnderlineStyle (QTextCharFormat::SingleUnderline);
 195                                 break;
 196                         case 2: // foreground
 197                                 format.setForeground (QBrush (QColor (attr[1])));
 198                                 break;
 199                         case 3: // background
 200                                 format.setBackground (QBrush (QColor (attr[1])));
 201                                 break;
 202                         default:
 203                                 break;
 204                         }
 205
 206                         qattrs.append (QAttribute (QInputMethodEvent::TextFormat, attr[2], attr[3] - attr[2], QVariant (format)));
 207                         // qDebug () << attr[0] << attr[2] << attr[3] - attr[2];
 208                 }
 209         }
 210         else {
 211                 qattrs.append (QAttribute (QInputMethodEvent::Cursor, 0, true, 0));
 212                 text = "";
 213                 cursor_pos = 0;
 214         }
 215
 216         preedit_string = text;
 217         preedit_visible = show;
 218         preedit_cursor_pos = cursor_pos;
 219
 220         QInputMethodEvent event (text, qattrs);
 221         sendEvent (event);
 222         update ();
 223 }