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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** 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.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
****************************************************************************/
#include "uncommentselection.h"
#include <QPlainTextEdit>
#include <QTextBlock>
using namespace Utils;
CommentDefinition::CommentDefinition() :
isAfterWhiteSpaces(false),
singleLine(QLatin1String("//")),
multiLineStart(QLatin1String("/*")),
multiLineEnd(QLatin1String("*/"))
{}
bool CommentDefinition::hasSingleLineStyle() const
{
return !singleLine.isEmpty();
}
bool CommentDefinition::hasMultiLineStyle() const
{
return !multiLineStart.isEmpty() && !multiLineEnd.isEmpty();
}
void CommentDefinition::clearCommentStyles()
{
singleLine.clear();
multiLineStart.clear();
multiLineEnd.clear();
}
static bool isComment(const QString &text, int index,
const QString &commentType)
{
const int length = commentType.length();
Q_ASSERT(text.length() - index >= length);
int i = 0;
while (i < length) {
if (text.at(index + i) != commentType.at(i))
return false;
++i;
}
return true;
}
void Utils::unCommentSelection(QPlainTextEdit *edit, const CommentDefinition &definition)
{
if (!definition.hasSingleLineStyle() && !definition.hasMultiLineStyle())
return;
QTextCursor cursor = edit->textCursor();
QTextDocument *doc = cursor.document();
cursor.beginEditBlock();
int pos = cursor.position();
int anchor = cursor.anchor();
int start = qMin(anchor, pos);
int end = qMax(anchor, pos);
bool anchorIsStart = (anchor == start);
QTextBlock startBlock = doc->findBlock(start);
QTextBlock endBlock = doc->findBlock(end);
if (end > start && endBlock.position() == end) {
--end;
endBlock = endBlock.previous();
}
bool doMultiLineStyleUncomment = false;
bool doMultiLineStyleComment = false;
bool doSingleLineStyleUncomment = false;
bool hasSelection = cursor.hasSelection();
if (hasSelection && definition.hasMultiLineStyle()) {
QString startText = startBlock.text();
int startPos = start - startBlock.position();
const int multiLineStartLength = definition.multiLineStart.length();
bool hasLeadingCharacters = !startText.left(startPos).trimmed().isEmpty();
if (startPos >= multiLineStartLength
&& isComment(startText,
startPos - multiLineStartLength,
definition.multiLineStart)) {
startPos -= multiLineStartLength;
start -= multiLineStartLength;
}
bool hasSelStart = startPos <= startText.length() - multiLineStartLength
&& isComment(startText, startPos, definition.multiLineStart);
QString endText = endBlock.text();
int endPos = end - endBlock.position();
const int multiLineEndLength = definition.multiLineEnd.length();
bool hasTrailingCharacters =
!endText.left(endPos).remove(definition.singleLine).trimmed().isEmpty()
&& !endText.mid(endPos).trimmed().isEmpty();
if (endPos <= endText.length() - multiLineEndLength
&& isComment(endText, endPos, definition.multiLineEnd)) {
endPos += multiLineEndLength;
end += multiLineEndLength;
}
bool hasSelEnd = endPos >= multiLineEndLength
&& isComment(endText, endPos - multiLineEndLength, definition.multiLineEnd);
doMultiLineStyleUncomment = hasSelStart && hasSelEnd;
doMultiLineStyleComment = !doMultiLineStyleUncomment
&& (hasLeadingCharacters
|| hasTrailingCharacters
|| !definition.hasSingleLineStyle());
} else if (!hasSelection && !definition.hasSingleLineStyle()) {
QString text = startBlock.text().trimmed();
doMultiLineStyleUncomment = text.startsWith(definition.multiLineStart)
&& text.endsWith(definition.multiLineEnd);
doMultiLineStyleComment = !doMultiLineStyleUncomment && !text.isEmpty();
start = startBlock.position();
end = endBlock.position() + endBlock.length() - 1;
if (doMultiLineStyleUncomment) {
int offset = 0;
text = startBlock.text();
const int length = text.length();
while (offset < length && text.at(offset).isSpace())
++offset;
start += offset;
}
}
if (doMultiLineStyleUncomment) {
cursor.setPosition(end);
cursor.movePosition(QTextCursor::PreviousCharacter,
QTextCursor::KeepAnchor,
definition.multiLineEnd.length());
cursor.removeSelectedText();
cursor.setPosition(start);
cursor.movePosition(QTextCursor::NextCharacter,
QTextCursor::KeepAnchor,
definition.multiLineStart.length());
cursor.removeSelectedText();
} else if (doMultiLineStyleComment) {
cursor.setPosition(end);
cursor.insertText(definition.multiLineEnd);
cursor.setPosition(start);
cursor.insertText(definition.multiLineStart);
} else {
endBlock = endBlock.next();
doSingleLineStyleUncomment = true;
for (QTextBlock block = startBlock; block != endBlock; block = block.next()) {
QString text = block.text().trimmed();
if (!text.isEmpty() && !text.startsWith(definition.singleLine)) {
doSingleLineStyleUncomment = false;
break;
}
}
const int singleLineLength = definition.singleLine.length();
for (QTextBlock block = startBlock; block != endBlock; block = block.next()) {
if (doSingleLineStyleUncomment) {
QString text = block.text();
int i = 0;
while (i <= text.size() - singleLineLength) {
if (isComment(text, i, definition.singleLine)) {
cursor.setPosition(block.position() + i);
cursor.movePosition(QTextCursor::NextCharacter,
QTextCursor::KeepAnchor,
singleLineLength);
cursor.removeSelectedText();
break;
}
if (!text.at(i).isSpace())
break;
++i;
}
} else {
const QString text = block.text();
foreach (QChar c, text) {
if (!c.isSpace()) {
if (definition.isAfterWhiteSpaces)
cursor.setPosition(block.position() + text.indexOf(c));
else
cursor.setPosition(block.position());
cursor.insertText(definition.singleLine);
break;
}
}
}
}
}
cursor.endEditBlock();
// adjust selection when commenting out
if (hasSelection && !doMultiLineStyleUncomment && !doSingleLineStyleUncomment) {
cursor = edit->textCursor();
if (!doMultiLineStyleComment)
start = startBlock.position(); // move the comment into the selection
int lastSelPos = anchorIsStart ? cursor.position() : cursor.anchor();
if (anchorIsStart) {
cursor.setPosition(start);
cursor.setPosition(lastSelPos, QTextCursor::KeepAnchor);
} else {
cursor.setPosition(lastSelPos);
cursor.setPosition(start, QTextCursor::KeepAnchor);
}
edit->setTextCursor(cursor);
}
}
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