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/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** Commercial Usage
**
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
**
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://qt.nokia.com/contact.
**
**************************************************************************/
#include "icompletioncollector.h"
#include "itexteditable.h"
#include <QtCore/QRegExp>
#include <algorithm>
using namespace TextEditor;
bool ICompletionCollector::compareChar(const QChar &l, const QChar &r)
{
if (l == QLatin1Char('_'))
return false;
else if (r == QLatin1Char('_'))
return true;
else
return l < r;
}
bool ICompletionCollector::lessThan(const QString &l, const QString &r)
{
return std::lexicographical_compare(l.begin(), l.end(),
r.begin(), r.end(),
compareChar);
}
bool ICompletionCollector::completionItemLessThan(const CompletionItem &i1, const CompletionItem &i2)
{
// The order is case-insensitive in principle, but case-sensitive when this would otherwise mean equality
const QString lower1 = i1.text.toLower();
const QString lower2 = i2.text.toLower();
if (lower1 == lower2)
return lessThan(i1.text, i2.text);
else
return lessThan(lower1, lower2);
}
QList<CompletionItem> ICompletionCollector::getCompletions()
{
QList<CompletionItem> completionItems;
completions(&completionItems);
qStableSort(completionItems.begin(), completionItems.end(), completionItemLessThan);
// Remove duplicates
QString lastKey;
QList<CompletionItem> uniquelist;
foreach (const CompletionItem &item, completionItems) {
if (item.text != lastKey) {
uniquelist.append(item);
lastKey = item.text;
} else {
uniquelist.last().duplicateCount++;
}
}
return uniquelist;
}
bool ICompletionCollector::partiallyComplete(const QList<TextEditor::CompletionItem> &completionItems)
{
// Compute common prefix
QString firstKey = completionItems.first().text;
QString lastKey = completionItems.last().text;
const int length = qMin(firstKey.length(), lastKey.length());
firstKey.truncate(length);
lastKey.truncate(length);
while (firstKey != lastKey) {
firstKey.chop(1);
lastKey.chop(1);
}
if (ITextEditable *ed = editor()) {
const int typedLength = ed->position() - startPosition();
if (!firstKey.isEmpty() && firstKey.length() > typedLength) {
ed->setCurPos(startPosition());
ed->replace(typedLength, firstKey);
}
}
return false;
}
void ICompletionCollector::filter(const QList<TextEditor::CompletionItem> &items,
QList<TextEditor::CompletionItem> *filteredItems,
const QString &key,
ICompletionCollector::CaseSensitivity caseSensitivity)
{
/*
* This code builds a regular expression in order to more intelligently match
* camel-case style. This means upper-case characters will be rewritten as follows:
*
* A => [a-z0-9_]*A (for any but the first capital letter)
*
* Meaning it allows any sequence of lower-case characters to preceed an
* upper-case character. So for example gAC matches getActionController.
*
* It also implements the first-letter-only case sensitivity.
*/
QString keyRegExp;
keyRegExp += QLatin1Char('^');
bool first = true;
const QLatin1String wordContinuation("[a-z0-9_]*");
foreach (const QChar &c, key) {
if (caseSensitivity == CaseInsensitive ||
(caseSensitivity == FirstLetterCaseSensitive && !first)) {
keyRegExp += QLatin1String("(?:");
if (c.isUpper() && !first)
keyRegExp += wordContinuation;
keyRegExp += QRegExp::escape(c.toUpper());
keyRegExp += QLatin1Char('|');
keyRegExp += QRegExp::escape(c.toLower());
keyRegExp += QLatin1Char(')');
} else {
if (c.isUpper() && !first)
keyRegExp += wordContinuation;
keyRegExp += QRegExp::escape(c);
}
first = false;
}
const QRegExp regExp(keyRegExp);
const bool hasKey = !key.isEmpty();
foreach (TextEditor::CompletionItem item, items) {
if (regExp.indexIn(item.text) == 0) {
if (hasKey) {
if (item.text.startsWith(key, Qt::CaseSensitive)) {
item.relevance = 2;
} else if (caseSensitivity != CaseSensitive
&& item.text.startsWith(key, Qt::CaseInsensitive)) {
item.relevance = 1;
}
}
filteredItems->append(item);
}
}
}
bool ICompletionCollector::shouldRestartCompletion()
{
return true;
}
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