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/****************************************************************************
**
** Copyright (C) 2012 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 "semantichighlighter.h"
#include "syntaxhighlighter.h"
#include <utils/qtcassert.h>
#include <QTextDocument>
#include <QTextBlock>
using namespace TextEditor;
using namespace TextEditor::SemanticHighlighter;
void TextEditor::SemanticHighlighter::incrementalApplyExtraAdditionalFormats(
SyntaxHighlighter *highlighter,
const QFuture<Result> &future,
int from, int to,
const QHash<int, QTextCharFormat> &kindToFormat)
{
if (to <= from)
return;
const int firstResultBlockNumber = future.resultAt(from).line - 1;
// blocks between currentBlockNumber and the last block with results will
// be cleaned of additional extra formats if they have no results
int currentBlockNumber = 0;
for (int i = from - 1; i >= 0; --i) {
const Result &result = future.resultAt(i);
const int blockNumber = result.line - 1;
if (blockNumber < firstResultBlockNumber) {
// stop! found where last format stopped
currentBlockNumber = blockNumber + 1;
// add previous results for the same line to avoid undoing their formats
from = i + 1;
break;
}
}
QTextDocument *doc = highlighter->document();
QTC_ASSERT(currentBlockNumber < doc->blockCount(), return);
QTextBlock b = doc->findBlockByNumber(currentBlockNumber);
Result result = future.resultAt(from);
for (int i = from; i < to && b.isValid(); ) {
const int blockNumber = result.line - 1;
QTC_ASSERT(blockNumber < doc->blockCount(), return);
// clear formats of blocks until blockNumber
while (currentBlockNumber < blockNumber) {
highlighter->setExtraAdditionalFormats(b, QList<QTextLayout::FormatRange>());
b = b.next();
++currentBlockNumber;
}
// collect all the formats for the current line
QList<QTextLayout::FormatRange> formats;
forever {
QTextLayout::FormatRange formatRange;
formatRange.format = kindToFormat.value(result.kind);
if (formatRange.format.isValid()) {
formatRange.start = result.column - 1;
formatRange.length = result.length;
formats.append(formatRange);
}
++i;
if (i >= to)
break;
result = future.resultAt(i);
const int nextBlockNumber = result.line - 1;
if (nextBlockNumber != blockNumber)
break;
}
highlighter->setExtraAdditionalFormats(b, formats);
b = b.next();
++currentBlockNumber;
}
}
void TextEditor::SemanticHighlighter::clearExtraAdditionalFormatsUntilEnd(
SyntaxHighlighter *highlighter,
const QFuture<Result> &future)
{
// find block number of last result
int lastBlockNumber = 0;
for (int i = future.resultCount() - 1; i >= 0; --i) {
const Result &result = future.resultAt(i);
if (result.line) {
lastBlockNumber = result.line - 1;
break;
}
}
QTextDocument *doc = highlighter->document();
const int firstBlockToClear = lastBlockNumber + 1;
if (firstBlockToClear == doc->blockCount())
return;
QTC_ASSERT(firstBlockToClear < doc->blockCount(), return);
QTextBlock b = doc->findBlockByNumber(firstBlockToClear);
while (b.isValid()) {
highlighter->setExtraAdditionalFormats(b, QList<QTextLayout::FormatRange>());
b = b.next();
}
}
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