--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/QTfrontend/ui/widget/SmartLineEdit.cpp Tue Oct 18 14:28:50 2011 +0200
@@ -0,0 +1,246 @@
+/*
+ * Hedgewars, a free turn based strategy game
+ * Copyright (c) 2006-2007 Igor Ulyanov <iulyanov@gmail.com>
+ * Copyright (c) 2007-2011 Andrey Korotaev <unC0Rr@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+#include <QStringList>
+
+#include "SmartLineEdit.h"
+
+SmartLineEdit::SmartLineEdit(QWidget * parent)
+: QLineEdit(parent)
+{
+ m_whitespace = QRegExp("\\s");
+
+ m_cmds = new QStringList();
+ m_nicks = new QStringList();
+
+ reset();
+
+ // reset when cursor is moved or content is changed
+ connect(this, SIGNAL(cursorPositionChanged(int, int)), this, SLOT(reset()));
+ connect(this, SIGNAL(textChanged(const QString&)), this, SLOT(reset()));
+}
+
+
+void SmartLineEdit::addCommands(const QStringList & commands)
+{
+ m_mutex.lock();
+
+ m_cmds->append(commands);
+
+ m_mutex.unlock();
+}
+
+
+void SmartLineEdit::removeCommands(const QStringList & commands)
+{
+ m_mutex.lock();
+
+ foreach (const QString & cmd, commands)
+ {
+ m_cmds->removeAll(cmd);
+ }
+
+ m_mutex.unlock();
+}
+
+
+void SmartLineEdit::addNickname(const QString & name)
+{
+ m_mutex.lock();
+
+ m_nicks->append(name);
+
+ m_mutex.unlock();
+}
+
+
+void SmartLineEdit::removeNickname(const QString & name)
+{
+ m_mutex.lock();
+
+ m_nicks->removeAll(name);
+
+ m_mutex.unlock();
+}
+
+bool SmartLineEdit::event(QEvent * event)
+{
+ // we only want special treatment for key press events
+ if (event->type() == QEvent::KeyPress)
+ {
+ QKeyEvent * keyEvent = static_cast<QKeyEvent*>(event);
+
+ // TAB key pressed and any useful chars in the matchMe -> let's process those
+ if ((keyEvent->key() == Qt::Key_Tab) && (!text().trimmed().isEmpty()))
+ {
+ keyPressEvent(keyEvent);
+ if (event->isAccepted())
+ return true;
+ }
+ }
+ return QLineEdit::event(event);
+}
+
+void SmartLineEdit::keyPressEvent(QKeyEvent * event)
+{
+ int key = event->key(); // retrieve pressed key
+
+ // auto-complete on pressed TAB (except for whitespace-only contents)
+ if ((key == Qt::Key_Tab) && (!text().trimmed().isEmpty()))
+ {
+ autoComplete();
+ event->accept();
+ }
+ // clear contents on pressed ESC
+ else if ((event->key() == Qt::Key_Escape) &&
+ (event->modifiers() == Qt::NoModifier)
+ )
+ clear();
+ // otherwise forward keys to parent
+ else
+ QLineEdit::keyPressEvent(event);
+}
+
+
+void SmartLineEdit::autoComplete()
+{
+ QString match = "";
+ bool isNick = false;
+ QString matchMe = text();
+ QString prefix = "";
+ QString postfix = "";
+ bool isFirstWord;
+
+ // we are trying to rematch, so use the data from earlier
+ if (m_hasJustMatched)
+ {
+ // restore values from earlier auto-completion
+ matchMe = m_beforeMatch;
+ prefix = m_prefix;
+ postfix = m_postfix;
+ isFirstWord = prefix.isEmpty();
+ }
+ else
+ {
+ m_mutex.lock();
+ m_cmds->sort();
+ m_nicks->sort();
+ m_mutex.unlock();
+
+ int cp = cursorPosition();
+
+ // cursor is not in or at end/beginning of word
+ if ((cp = matchMe.length()) || (QString(matchMe.at(cp)).contains(m_whitespace)))
+ if ((cp < 1) || (QString(matchMe.at(cp-1)).contains(m_whitespace)))
+ return;
+
+ // crop matchMe at cursor position
+ prefix = matchMe.left (cp);
+ postfix = matchMe.right(matchMe.length()-cp);
+
+ matchMe = "";
+
+
+ // use the whole word the curser is on for matching
+ int prefixLen = prefix.lastIndexOf(m_whitespace) + 1;
+ int preWordLen = prefix.length() - prefixLen;
+ int postWordLen = postfix.indexOf(m_whitespace);
+ int postfixLen = 0;
+ if (postWordLen < 0)
+ postWordLen = postfix.length();
+ else
+ postfixLen = postfix.length() - (postWordLen + 1);
+
+ matchMe = prefix.right(preWordLen) + postfix.left(postWordLen);
+ prefix = prefix.left(prefixLen);
+ postfix = postfix.right(postfixLen);
+
+
+ isFirstWord = prefix.isEmpty(); // true if first word
+ }
+
+
+ m_mutex.lock();
+
+ if (isFirstWord)
+ {
+ // find matching commands
+ foreach (const QString & cmd, *m_cmds)
+ {
+ if (cmd.startsWith(matchMe, Qt::CaseInsensitive))
+ {
+ match = cmd;
+
+ // move match to end so next time new matches will be prefered
+ if (m_cmds->removeAll(cmd) > 0);
+ m_cmds->append(cmd);
+
+ break;
+ }
+ }
+ }
+
+ if (match.isEmpty())
+ {
+ // find matching nicks
+ foreach (const QString & nick, *m_nicks)
+ {
+ if (nick.startsWith(matchMe, Qt::CaseInsensitive))
+ {
+ match = nick;
+ isNick = true;
+
+ // move match to end so next time new matches will be prefered
+ if (m_nicks->removeAll(nick) > 0);
+ m_nicks->append(nick);
+
+ break;
+ }
+ }
+ }
+
+ m_mutex.unlock();
+
+ // we found a single match?
+ if (!match.isEmpty())
+ {
+ // replace last word with match
+ // and append ':' if a name at the beginning of the matchMe got completed
+ // also add a space at the very end to ease further typing
+ QString addAfter = ((isNick && isFirstWord)?": ":" ");
+ match = prefix + match + addAfter;
+ setText(match + postfix);
+
+ setCursorPosition(match.length());
+
+ // save values for for the case a rematch is requested
+ m_beforeMatch = matchMe;
+ m_hasJustMatched = true;
+ m_prefix = prefix;
+ m_postfix = postfix;
+ }
+}
+
+void SmartLineEdit::reset()
+{
+ m_beforeMatch = "";
+ m_hasJustMatched = false;
+ m_prefix = "";
+ m_postfix = "";
+}