src/uisupport/inputline.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 "inputline.h"
  22
  23 #include "tabcompleter.h"
  24
  25 InputLine::InputLine(QWidget *parent)
  26   : QLineEdit(parent),
  27     idx(0),
  28     tabCompleter(new TabCompleter(this))
  29 {
  30   connect(this, SIGNAL(returnPressed()), this, SLOT(on_returnPressed()));
  31   connect(this, SIGNAL(textChanged(QString)), this, SLOT(on_textChanged(QString)));
  32 }
  33
  34 InputLine::~InputLine() {
  35 }
  36
  37 void InputLine::keyPressEvent(QKeyEvent * event) {
  38   switch(event->key()) {
  39   case Qt::Key_Up:
  40     event->accept();
  41
  42     if(addToHistory(text())) {
  43       clear();
  44       break;
  45     }
  46
  47     if(idx > 0) {
  48       idx--;
  49       setText(history[idx]);
  50     }
  51
  52     break;
  53
  54   case Qt::Key_Down:
  55     event->accept();
  56
  57     if(addToHistory(text())) {
  58       clear();
  59       break;
  60     }
  61
  62     if(idx < history.count())
  63       idx++;
  64
  65     if(idx < history.count())
  66       setText(history[idx]);
  67     else
  68       clear();
  69
  70     break;
  71
  72   case Qt::Key_Select:          // for Qtopia
  73     emit returnPressed();
  74
  75   default:
  76     QLineEdit::keyPressEvent(event);
  77   }
  78 }
  79
  80 bool InputLine::addToHistory(const QString &text) {
  81   if(text.isEmpty())
  82     return false;
  83
  84   Q_ASSERT(0 <= idx && idx <= history.count());
  85
  86   if(history.isEmpty() || text != history[idx - (int)(idx == history.count())]) {
  87     // if we change an entry of the history the changed entry is appended to the list and we seek to the end
  88     // we could also easily change the entry in the history... per setting maybe?
  89     history << text;
  90     idx = history.count();
  91     return true;
  92   } else {
  93     return false;
  94   }
  95 }
  96
  97 void InputLine::on_returnPressed() {
  98   addToHistory(text());
  99   emit sendText(text());
 100   clear();
 101 }
 102
 103 void InputLine::on_textChanged(QString newText) {
 104   QStringList lineSeperators;
 105   lineSeperators << QString("\r\n")
 106                  << QString('\n')
 107                  << QString('\r');
 108
 109   QString lineSep;
 110   foreach(QString seperator, lineSeperators) {
 111     if(newText.contains(seperator)) {
 112       lineSep = seperator;
 113       break;
 114     }
 115   }
 116
 117   if(lineSep.isEmpty())
 118     return;
 119
 120   if(newText.contains(lineSep)) {
 121     clear();
 122     QString line = newText.section(lineSep, 0, 0);
 123     QString remainder = newText.section(lineSep, 1);
 124     insert(line);
 125     emit returnPressed();
 126     insert(remainder);
 127   }
 128
 129 }
 130