src/uisupport/tabcompleter.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2005/06 by the Quassel Project                          *
   3  *   devel@quassel-irc.org                                                 *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) version 3.                                           *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20
  21 #include "tabcompleter.h"
  22
  23 #include "inputline.h"
  24 #include "client.h"
  25 #include "buffermodel.h"
  26 #include "networkmodel.h"
  27 #include "network.h"
  28 #include "ircchannel.h"
  29 #include "ircuser.h"
  30
  31 TabCompleter::TabCompleter(InputLine *inputLine_)
  32   : QObject(inputLine_),
  33     inputLine(inputLine_),
  34     enabled(false),
  35     nickSuffix(": ")
  36 {
  37   inputLine->installEventFilter(this);
  38 }
  39
  40 void TabCompleter::buildCompletionList() {
  41   completionList.clear();
  42   nextCompletion = completionList.begin();
  43   // this is the first time tab is pressed -> build up the completion list and it's iterator
  44   QModelIndex currentIndex = Client::bufferModel()->currentIndex();
  45   if(!currentIndex.data(NetworkModel::BufferIdRole).isValid())
  46     return;
  47
  48   NetworkId networkId = currentIndex.data(NetworkModel::NetworkIdRole).value<NetworkId>();
  49   QString channelName = currentIndex.sibling(currentIndex.row(), 0).data().toString();
  50
  51   const Network *network = Client::network(networkId);
  52   if(!network)
  53     return;
  54
  55   IrcChannel *channel = network->ircChannel(channelName);
  56   if(!channel)
  57     return;
  58
  59   // FIXME commented for debugging
  60   /*
  61   disconnect(this, SLOT(ircUserJoinedOrParted(IrcUser *)));
  62   connect(channel, SIGNAL(ircUserJoined(IrcUser *)),
  63           this, SLOT(ircUserJoinedOrParted(IrcUser *)));
  64   connect(channel, SIGNAL(ircUserParted(IrcUser *)),
  65           this, SLOT(ircUserJoinedOrParted(IrcUser *)));
  66   */
  67
  68   completionList.clear();
  69   QString tabAbbrev = inputLine->text().left(inputLine->cursorPosition()).section(' ',-1,-1);
  70   completionList.clear();
  71   foreach(IrcUser *ircUser, channel->ircUsers()) {
  72     if(ircUser->nick().toLower().startsWith(tabAbbrev.toLower())) {
  73       completionList << ircUser->nick();
  74     }
  75   }
  76   completionList.sort();
  77   nextCompletion = completionList.begin();
  78   lastCompletionLength = tabAbbrev.length();
  79 }
  80
  81 void TabCompleter::ircUserJoinedOrParted(IrcUser *ircUser) {
  82   Q_UNUSED(ircUser)
  83   buildCompletionList();
  84 }
  85
  86 void TabCompleter::complete() {
  87   if(!enabled) {
  88     buildCompletionList();
  89     enabled = true;
  90   }
  91
  92   if (nextCompletion != completionList.end()) {
  93     // clear previous completion
  94     for (int i = 0; i < lastCompletionLength; i++) {
  95       inputLine->backspace();
  96     }
  97
  98     // insert completion
  99     inputLine->insert(*nextCompletion);
 100
 101     // remember charcount to delete next time and advance to next completion
 102     lastCompletionLength = nextCompletion->length();
 103     nextCompletion++;
 104
 105     // we're completing the first word of the line
 106     if(inputLine->text().length() == lastCompletionLength) {
 107       inputLine->insert(nickSuffix);
 108       lastCompletionLength += nickSuffix.length();
 109     }
 110
 111   // we're at the end of the list -> start over again
 112   } else {
 113     nextCompletion = completionList.begin();
 114   }
 115
 116 }
 117
 118 void TabCompleter::reset() {
 119   enabled = false;
 120 }
 121
 122 bool TabCompleter::eventFilter(QObject *obj, QEvent *event) {
 123   if(obj != inputLine || event->type() != QEvent::KeyPress)
 124     return QObject::eventFilter(obj, event);
 125
 126   QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);
 127
 128   if(keyEvent->key() == Qt::Key_Tab) {
 129     complete();
 130     return true;
 131   } else {
 132     reset();
 133     return false;
 134   }
 135 }
 136