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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** 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 The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
****************************************************************************/
#include "semantichighlighter.h"
#include "syntaxhighlighter.h"
#include "texteditorsettings.h"
#include <utils/qtcassert.h>
#include <QTextBlock>
#include <QTextDocument>
#include <algorithm>
using namespace TextEditor;
using namespace TextEditor::SemanticHighlighter;
namespace {
class Range {
public:
QTextLayout::FormatRange formatRange;
QTextBlock block;
};
using Ranges = QVector<Range>;
Ranges rangesForResult(const HighlightingResult &result,
QTextDocument *doc,
const QHash<int, QTextCharFormat> &kindToFormat)
{
const QTextCharFormat format = result.useTextSyles
? TextEditorSettings::fontSettings().toTextCharFormat(result.textStyles)
: kindToFormat.value(result.kind);
if (!format.isValid())
return {};
HighlightingResult curResult = result;
QTextBlock curBlock = doc->findBlockByNumber(curResult.line - 1);
Ranges ranges;
while (curBlock.isValid()) {
Range range;
range.block = curBlock;
range.formatRange.format = format;
range.formatRange.start = curResult.column - 1;
range.formatRange.length = std::min(curResult.length,
curBlock.length() - range.formatRange.start);
ranges << range;
if (range.formatRange.length == curResult.length)
break;
curBlock = curBlock.next();
curResult.column = 1;
curResult.length -= range.formatRange.length;
}
return ranges;
}
}
void SemanticHighlighter::incrementalApplyExtraAdditionalFormats(
SyntaxHighlighter *highlighter,
const QFuture<HighlightingResult> &future,
int from, int to,
const QHash<int, QTextCharFormat> &kindToFormat)
{
if (to <= from)
return;
const int firstResultBlockNumber = int(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 HighlightingResult &result = future.resultAt(i);
const int blockNumber = int(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 currentBlock = doc->findBlockByNumber(currentBlockNumber);
std::map<QTextBlock, QVector<QTextLayout::FormatRange>> formatRanges;
for (int i = from; i < to; ++i) {
const Ranges ranges = rangesForResult(future.resultAt(i), doc, kindToFormat);
for (const Range &range : ranges)
formatRanges[range.block].append(range.formatRange);
}
for (auto &[block, ranges] : formatRanges) {
while (currentBlock < block) {
highlighter->clearExtraFormats(currentBlock);
currentBlock = currentBlock.next();
}
highlighter->setExtraFormats(block, std::move(ranges));
currentBlock = block.next();
}
}
void SemanticHighlighter::setExtraAdditionalFormats(SyntaxHighlighter *highlighter,
const QList<HighlightingResult> &results,
const QHash<int, QTextCharFormat> &kindToFormat)
{
if (!highlighter)
return;
highlighter->clearAllExtraFormats();
QTextDocument *doc = highlighter->document();
QTC_ASSERT(doc, return );
std::map<QTextBlock, QVector<QTextLayout::FormatRange>> formatRanges;
for (auto result : results) {
const Ranges ranges = rangesForResult(result, doc, kindToFormat);
for (const Range &range : ranges)
formatRanges[range.block].append(range.formatRange);
}
for (auto &[block, ranges] : formatRanges)
highlighter->setExtraFormats(block, std::move(ranges));
}
void SemanticHighlighter::clearExtraAdditionalFormatsUntilEnd(
SyntaxHighlighter *highlighter,
const QFuture<HighlightingResult> &future)
{
// find block number of last result
int lastBlockNumber = 0;
for (int i = future.resultCount() - 1; i >= 0; --i) {
const HighlightingResult &result = future.resultAt(i);
if (result.line) {
lastBlockNumber = int(result.line) - 1;
break;
}
}
QTextDocument *doc = highlighter->document();
const int firstBlockToClear = lastBlockNumber + 1;
if (firstBlockToClear >= doc->blockCount())
return;
QTextBlock b = doc->findBlockByNumber(firstBlockToClear);
while (b.isValid()) {
highlighter->clearExtraFormats(b);
b = b.next();
}
}
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