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