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/*
SPDX-FileCopyrightText: 2007 Andreas Pakulat <apaku@gmx.de>
SPDX-FileCopyrightText: 2010 Julien Desgats <julien.desgats@gmail.com>
SPDX-License-Identifier: LGPL-2.0-or-later
*/
#include "grepoutputdelegate.h"
#include "grepoutputmodel.h"
#include <KLocalizedString>
#include <QAbstractTextDocumentLayout>
#include <QModelIndex>
#include <QPainter>
#include <QRegularExpression>
#include <QTextCharFormat>
#include <QTextCursor>
#include <QTextDocument>
#include <cmath>
#include <algorithm>
GrepOutputDelegate* GrepOutputDelegate::m_self = nullptr;
GrepOutputDelegate* GrepOutputDelegate::self()
{
Q_ASSERT(m_self);
return m_self;
}
GrepOutputDelegate::GrepOutputDelegate( QObject* parent )
: QStyledItemDelegate(parent)
{
Q_ASSERT(!m_self);
m_self = this;
}
GrepOutputDelegate::~GrepOutputDelegate()
{
m_self = nullptr;
}
void GrepOutputDelegate::paint( QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index ) const
{
// there is no function in QString to left-trim. A call to remove this regexp does the job
static const QRegularExpression leftspaces(QStringLiteral("^\\s*"));
// rich text component
const auto* model = qobject_cast<const GrepOutputModel*>(index.model());
const auto *item = dynamic_cast<const GrepOutputItem *>(model->itemFromIndex(index));
QStyleOptionViewItem options = option;
initStyleOption(&options, index);
// building item representation
QTextDocument doc;
QTextCursor cur(&doc);
QPalette::ColorGroup cg = (options.state & QStyle::State_Enabled)
? QPalette::Normal : QPalette::Disabled;
QPalette::ColorRole cr = (options.state & QStyle::State_Selected)
? QPalette::HighlightedText : QPalette::Text;
QTextCharFormat fmt = cur.charFormat();
fmt.setFont(options.font);
if(item && item->isText())
{
// Use custom manual highlighting
const KTextEditor::Range rng = item->change()->m_range;
// the line number appears grayed
fmt.setForeground(options.palette.brush(QPalette::Disabled, cr));
cur.insertText(i18n("Line %1: ",item->lineNumber()), fmt);
// switch to normal color
fmt.setForeground(options.palette.brush(cg, cr));
cur.insertText(item->text().left(rng.start().column()).remove(leftspaces), fmt);
fmt.setFontWeight(QFont::Bold);
if ( !(options.state & QStyle::State_Selected) ) {
QColor bgHighlight = option.palette.color(QPalette::AlternateBase);
fmt.setBackground(bgHighlight);
}
cur.insertText(item->text().mid(rng.start().column(), rng.end().column() - rng.start().column()), fmt);
fmt.clearBackground();
fmt.setFontWeight(QFont::Normal);
cur.insertText(item->text().mid(rng.end().column()), fmt);
}else{
QString text;
if(item)
text = item->text();
else
text = index.data().toString();
// Simply insert the text as html. We use this for the titles.
doc.setHtml(text);
}
painter->save();
options.text = QString(); // text will be drawn separately
options.widget->style()->drawControl(QStyle::CE_ItemViewItem, &options, painter, options.widget);
// set correct draw area
QRect clip = options.widget->style()->subElementRect(QStyle::SE_ItemViewItemText, &options);
QFontMetrics metrics(options.font);
painter->translate(clip.topLeft() - QPoint(0, metrics.descent()));
// We disable the clipping for now, as it leads to strange clipping errors
// clip.setTopLeft(QPoint(0,0));
// painter->setClipRect(clip);
QAbstractTextDocumentLayout::PaintContext ctx;
// ctx.clip = clip;
painter->setBackground(Qt::transparent);
doc.documentLayout()->draw(painter, ctx);
painter->restore();
}
QSize GrepOutputDelegate::sizeHint(const QStyleOptionViewItem& option, const QModelIndex& index) const
{
const auto* model = qobject_cast<const GrepOutputModel*>(index.model());
const GrepOutputItem *item = model ? dynamic_cast<const GrepOutputItem *>(model->itemFromIndex(index)) : nullptr;
QSize ret = QStyledItemDelegate::sizeHint(option, index);
//take account of additional width required for highlighting (bold text)
//and line numbers. These are not included in the default Qt size calculation.
if(item && item->isText())
{
QFont font = option.font;
QFontMetrics metrics(font);
font.setBold(true);
QFontMetrics bMetrics(font);
const KTextEditor::Range rng = item->change()->m_range;
int width = metrics.horizontalAdvance(item->text().left(rng.start().column()))
+ metrics.horizontalAdvance(item->text().mid(rng.end().column()))
+ bMetrics.horizontalAdvance(
item->text().mid(rng.start().column(), rng.end().column() - rng.start().column()))
+ option.fontMetrics.horizontalAdvance(i18n("Line %1: ", item->lineNumber()))
+ std::max(option.decorationSize.width(), 0);
ret.setWidth(width);
}else{
// This is only used for titles, so not very performance critical
QString text;
if(item)
text = item->text();
else
text = index.data().toString();
QTextDocument doc;
doc.setDocumentMargin(0);
doc.setHtml(text);
QSize newSize = doc.size().toSize();
if(newSize.height() > ret.height())
ret.setHeight(newSize.height());
}
return ret;
}
#include "moc_grepoutputdelegate.cpp"
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