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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include "baseannotationhighlighter.h"
#include <texteditor/fontsettings.h>
#include <texteditor/syntaxhighlighter.h>
#include <texteditor/texteditorsettings.h>
#include <utils/algorithm.h>
#include <QColor>
#include <QDebug>
#include <QTextCharFormat>
#include <QTextDocument>
typedef QMap<QString, QTextCharFormat> ChangeNumberFormatMap;
/*!
\class VcsBase::BaseAnnotationHighlighter
\brief The BaseAnnotationHighlighter class is the base class for a
highlighter for annotation lines of the form 'changenumber:XXXX'.
The change numbers are assigned a color gradient. Example:
\code
112: text1 <color 1>
113: text2 <color 2>
112: text3 <color 1>
\endcode
*/
namespace VcsBase {
class BaseAnnotationHighlighterPrivate
{
public:
BaseAnnotationHighlighterPrivate(BaseAnnotationHighlighter *q_) : q(q_) { }
void updateOtherFormats();
QSet<QString> annotationChanges() const;
ChangeNumberFormatMap m_changeNumberMap;
Annotation m_annotation;
QColor m_background;
BaseAnnotationHighlighter *const q;
};
void BaseAnnotationHighlighterPrivate::updateOtherFormats()
{
m_background = q->fontSettings()
.toTextCharFormat(TextEditor::C_TEXT)
.brushProperty(QTextFormat::BackgroundBrush)
.color();
q->setChangeNumbers(Utils::toSet(m_changeNumberMap.keys()));
}
QSet<QString> BaseAnnotationHighlighterPrivate::annotationChanges() const
{
if (!q->document())
return {};
QSet<QString> changes;
const QString text = q->document()->toPlainText();
QStringView txt = QStringView(text);
if (txt.isEmpty())
return changes;
if (!m_annotation.separatorPattern.pattern().isEmpty()) {
const QRegularExpressionMatch match = m_annotation.separatorPattern.match(txt);
if (match.hasMatch())
txt.truncate(match.capturedStart());
}
QRegularExpressionMatchIterator i = m_annotation.entryPattern.globalMatch(txt);
while (i.hasNext()) {
const QRegularExpressionMatch match = i.next();
changes.insert(match.captured(1));
}
return changes;
}
BaseAnnotationHighlighter::BaseAnnotationHighlighter(const Annotation &annotation)
: TextEditor::SyntaxHighlighter()
, d(new BaseAnnotationHighlighterPrivate(this))
{
setDefaultTextFormatCategories();
d->m_annotation = annotation;
d->updateOtherFormats();
}
BaseAnnotationHighlighter::~BaseAnnotationHighlighter()
{
// The destructor of the base class indirectly triggers a QTextDocument::contentsChang signal
// which is still connected to setChangeNumbersForAnnotation. The connection is guarded by
// 'this', but since it was not fully destructed it still calls the function. Explicitly set
// a null document here to disconnect that connection and correctly reset all highlights.
setDocument(nullptr);
delete d;
}
void BaseAnnotationHighlighter::documentChanged(QTextDocument *oldDoc, QTextDocument *newDoc)
{
if (oldDoc)
disconnect(oldDoc,
&QTextDocument::contentsChange,
this,
&BaseAnnotationHighlighter::setChangeNumbersForAnnotation);
if (newDoc)
connect(newDoc,
&QTextDocument::contentsChange,
this,
&BaseAnnotationHighlighter::setChangeNumbersForAnnotation);
}
void BaseAnnotationHighlighter::setChangeNumbersForAnnotation()
{
setChangeNumbers(d->annotationChanges());
d->updateOtherFormats();
}
void BaseAnnotationHighlighter::setChangeNumbers(const ChangeNumbers &changeNumbers)
{
d->m_changeNumberMap.clear();
const int changeNumberCount = changeNumbers.size();
if (changeNumberCount == 0)
return;
// Assign a color gradient to annotation change numbers. Give
// each change number a unique color.
const QList<QColor> colors =
TextEditor::SyntaxHighlighter::generateColors(changeNumberCount, d->m_background);
int m = 0;
const int cstep = colors.count() / changeNumberCount;
const ChangeNumbers::const_iterator cend = changeNumbers.constEnd();
for (ChangeNumbers::const_iterator it = changeNumbers.constBegin(); it != cend; ++it) {
QTextCharFormat format;
format.setForeground(colors.at(m));
d->m_changeNumberMap.insert(*it, format);
m += cstep;
}
}
void BaseAnnotationHighlighter::highlightBlock(const QString &text)
{
if (text.isEmpty() || d->m_changeNumberMap.empty())
return;
const QString change = changeNumber(text);
const ChangeNumberFormatMap::const_iterator it = d->m_changeNumberMap.constFind(change);
if (it != d->m_changeNumberMap.constEnd())
setFormatWithSpaces(text, 0, text.length(), it.value());
}
void BaseAnnotationHighlighter::setFontSettings(const TextEditor::FontSettings &fontSettings)
{
SyntaxHighlighter::setFontSettings(fontSettings);
d->updateOtherFormats();
}
void BaseAnnotationHighlighter::rehighlight()
{
const QSet<QString> changes = d->annotationChanges();
if (changes.isEmpty())
return;
setChangeNumbers(changes);
SyntaxHighlighter::rehighlight();
}
} // namespace VcsBase
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