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  *
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   8  *   (at your option) version 3.                                           *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
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  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
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  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 bufferName = currentIndex.sibling(currentIndex.row(), 0).data().toString();
  54
  55   const Network *network = Client::network(networkId);
  56   if(!network)
  57     return;
  58
  59
  60   QString tabAbbrev = inputLine->text().left(inputLine->cursorPosition()).section(' ',-1,-1);
  61   QRegExp regex(QString("^[^a-zA-Z]*").append(QRegExp::escape(tabAbbrev)), Qt::CaseInsensitive);
  62
  63   switch(static_cast<BufferInfo::Type>(currentIndex.data(NetworkModel::BufferTypeRole).toInt())) {
  64   case BufferInfo::ChannelBuffer:
  65     { // scope is needed for local var declaration
  66       IrcChannel *channel = network->ircChannel(bufferName);
  67       if(!channel)
  68         return;
  69       foreach(IrcUser *ircUser, channel->ircUsers()) {
  70         if(regex.indexIn(ircUser->nick()) > -1)
  71           completionMap[ircUser->nick().toLower()] = ircUser->nick();
  72       }
  73     }
  74     break;
  75   case BufferInfo::QueryBuffer:
  76     if(regex.indexIn(bufferName) > -1)
  77       completionMap[bufferName.toLower()] = bufferName;
  78   case BufferInfo::StatusBuffer:
  79     if(!network->myNick().isEmpty() && regex.indexIn(network->myNick()) > -1)
  80       completionMap[network->myNick().toLower()] = network->myNick();
  81     break;
  82   default:
  83     return;
  84   }
  85
  86   nextCompletion = completionMap.begin();
  87   lastCompletionLength = tabAbbrev.length();
  88 }
  89
  90 void TabCompleter::ircUserJoinedOrParted(IrcUser *ircUser) {
  91   Q_UNUSED(ircUser)
  92   buildCompletionList();
  93 }
  94
  95 void TabCompleter::complete() {
  96   if(!enabled) {
  97     buildCompletionList();
  98     enabled = true;
  99   }
 100
 101   if (nextCompletion != completionMap.end()) {
 102     // clear previous completion
 103     for (int i = 0; i < lastCompletionLength; i++) {
 104       inputLine->backspace();
 105     }
 106
 107     // insert completion
 108     inputLine->insert(*nextCompletion);
 109
 110     // remember charcount to delete next time and advance to next completion
 111     lastCompletionLength = nextCompletion->length();
 112     nextCompletion++;
 113
 114     // we're completing the first word of the line
 115     if(inputLine->text().length() == lastCompletionLength) {
 116       inputLine->insert(nickSuffix);
 117       lastCompletionLength += nickSuffix.length();
 118     }
 119
 120   // we're at the end of the list -> start over again
 121   } else {
 122     if(!completionMap.isEmpty()) {
 123       nextCompletion = completionMap.begin();
 124       complete();
 125     }
 126   }
 127
 128 }
 129
 130 void TabCompleter::reset() {
 131   enabled = false;
 132 }
 133
 134 bool TabCompleter::eventFilter(QObject *obj, QEvent *event) {
 135   if(obj != inputLine || event->type() != QEvent::KeyPress)
 136     return QObject::eventFilter(obj, event);
 137
 138   QKeyEvent *keyEvent = static_cast<QKeyEvent *>(event);
 139
 140   if(keyEvent->key() == Qt::Key_Tab) {
 141     complete();
 142     return true;
 143   } else {
 144     reset();
 145     return false;
 146   }
 147 }
 148