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  *                                                                         *
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  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 #include <QRegExp>
  32
  33 TabCompleter::TabCompleter(InputLine *inputLine_)
  34   : QObject(inputLine_),
  35     inputLine(inputLine_),
  36     enabled(false),
  37     nickSuffix(": ")
  38 {
  39   inputLine->installEventFilter(this);
  40 }
  41
  42 void TabCompleter::buildCompletionList() {
  43   // ensure a safe state in case we return early.
  44   completionMap.clear();
  45   nextCompletion = completionMap.begin();
  46
  47   // this is the first time tab is pressed -> build up the completion list and it's iterator
  48   QModelIndex currentIndex = Client::bufferModel()->currentIndex();
  49   if(!currentIndex.data(NetworkModel::BufferIdRole).isValid())
  50     return;
  51
  52   NetworkId networkId = currentIndex.data(NetworkModel::NetworkIdRole).value<NetworkId>();
  53   QString channelName = currentIndex.sibling(currentIndex.row(), 0).data().toString();
  54
  55   const Network *network = Client::network(networkId);
  56   if(!network)
  57     return;
  58
  59   IrcChannel *channel = network->ircChannel(channelName);
  60   if(!channel)
  61     return;
  62
  63   // FIXME commented for debugging
  64   /*
  65   disconnect(this, SLOT(ircUserJoinedOrParted(IrcUser *)));
  66   connect(channel, SIGNAL(ircUserJoined(IrcUser *)),
  67           this, SLOT(ircUserJoinedOrParted(IrcUser *)));
  68   connect(channel, SIGNAL(ircUserParted(IrcUser *)),
  69           this, SLOT(ircUserJoinedOrParted(IrcUser *)));
  70   */
  71
  72   QString tabAbbrev = inputLine->text().left(inputLine->cursorPosition()).section(' ',-1,-1);
  73   QRegExp regex(QString("^[^a-zA-Z]*").append(QRegExp::escape(tabAbbrev)), Qt::CaseInsensitive);
  74
  75   foreach(IrcUser *ircUser, channel->ircUsers()) {
  76     if(regex.indexIn(ircUser->nick()) > -1) {
  77       completionMap[ircUser->nick().toLower()] = ircUser->nick();
  78     }
  79   }
  80
  81   nextCompletion = completionMap.begin();
  82   lastCompletionLength = tabAbbrev.length();
  83 }
  84
  85 void TabCompleter::ircUserJoinedOrParted(IrcUser *ircUser) {
  86   Q_UNUSED(ircUser)
  87   buildCompletionList();
  88 }
  89
  90 void TabCompleter::complete() {
  91   if(!enabled) {
  92     buildCompletionList();
  93     enabled = true;
  94   }
  95
  96   if (nextCompletion != completionMap.end()) {
  97     // clear previous completion
  98     for (int i = 0; i < lastCompletionLength; i++) {
  99       inputLine->backspace();
 100     }
 101
 102     // insert completion
 103     inputLine->insert(*nextCompletion);
 104
 105     // remember charcount to delete next time and advance to next completion
 106     lastCompletionLength = nextCompletion->length();
 107     nextCompletion++;
 108
 109     // we're completing the first word of the line
 110     if(inputLine->text().length() == lastCompletionLength) {
 111       inputLine->insert(nickSuffix);
 112       lastCompletionLength += nickSuffix.length();
 113     }
 114
 115   // we're at the end of the list -> start over again
 116   } else {
 117     if(!completionMap.isEmpty()) {
 118       nextCompletion = completionMap.begin();
 119       complete();
 120     }
 121   }
 122
 123 }
 124
 125 void TabCompleter::reset() {
 126   enabled = false;
 127 }
 128
 129 bool TabCompleter::eventFilter(QObject *obj, QEvent *event) {
 130   if(obj != inputLine || event->type() != QEvent::KeyPress)
 131     return QObject::eventFilter(obj, event);
 132
 133   QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);
 134
 135   if(keyEvent->key() == Qt::Key_Tab) {
 136     complete();
 137     return true;
 138   } else {
 139     reset();
 140     return false;
 141   }
 142 }
 143