File indexing completed on 2024-05-12 16:27:09

 /*
    SPDX-FileCopyrightText: 2020-2024 Laurent Montel <montel@kde.org>
 
    SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #include "messagedelegateutils.h"
 #include "delegateutils/textselection.h"
 #include "model/messagesmodel.h"
 
 #include <QApplication>
 #include <QClipboard>
 #include <QPainter>
 #include <QTextFrame>
 #include <QTextFrameFormat>
 #include <QTextStream>
 
 std::unique_ptr<QTextDocument> MessageDelegateUtils::createTextDocument(bool useItalic, const QString &text, int width)
 {
     std::unique_ptr<QTextDocument> doc(new QTextDocument);
     doc->setHtml(text);
     doc->setTextWidth(width);
     QFont font = qApp->font();
     font.setItalic(useItalic);
     doc->setDefaultFont(font);
     QTextFrame *frame = doc->frameAt(0);
     QTextFrameFormat frameFormat = frame->frameFormat();
     frameFormat.setMargin(0);
     frame->setFrameFormat(frameFormat);
     return doc;
 }
 
 bool MessageDelegateUtils::generateToolTip(const QTextDocument *doc, const QPoint &pos, QString &formattedTooltip)
 {
     const auto format = doc->documentLayout()->formatAt(pos);
     const auto tooltip = format.property(QTextFormat::TextToolTip).toString();
     const auto href = format.property(QTextFormat::AnchorHref).toString();
     if (tooltip.isEmpty() && (href.isEmpty() || href.startsWith(QLatin1String("ruqola:/")))) {
         return false;
     }
 
     generateToolTip(tooltip, href, formattedTooltip);
     return true;
 }
 
 void MessageDelegateUtils::generateToolTip(const QString &toolTip, const QString &href, QString &formattedTooltip)
 {
     QTextStream stream(&formattedTooltip);
     auto addLine = [&](const QString &line) {
         if (!line.isEmpty()) {
             stream << QLatin1String("<p>") << line << QLatin1String("</p>");
         }
     };
 
     stream << QLatin1String("<qt>");
     addLine(toolTip);
     addLine(href);
     stream << QLatin1String("</qt>");
 }
 
 bool MessageDelegateUtils::useItalicsForMessage(const QModelIndex &index)
 {
     const auto messageType = index.data(MessagesModel::MessageType).value<Message::MessageType>();
     const bool isSystemMessage =
         messageType == Message::System && index.data(MessagesModel::SystemMessageType).toString() != QStringLiteral("jitsi_call_started");
     return isSystemMessage;
 }
 
 bool MessageDelegateUtils::pendingMessage(const QModelIndex &index)
 {
     return index.data(MessagesModel::PendingMessage).toBool();
 }
 
 QVector<QAbstractTextDocumentLayout::Selection> MessageDelegateUtils::selection(TextSelection *selection,
                                                                                 QTextDocument *doc,
                                                                                 const QModelIndex &index,
                                                                                 const QStyleOptionViewItem &option,
                                                                                 const MessageAttachment &msgAttach,
                                                                                 const MessageUrl &msgUrl,
                                                                                 bool isAMessage)
 {
     QVector<QAbstractTextDocumentLayout::Selection> selections;
     const QTextCursor selectionTextCursor = selection->selectionForIndex(index, doc, msgAttach, msgUrl);
     if (!selectionTextCursor.isNull()) {
         QTextCharFormat selectionFormat;
         selectionFormat.setBackground(option.palette.brush(QPalette::Highlight));
         selectionFormat.setForeground(option.palette.brush(QPalette::HighlightedText));
         selections.append({selectionTextCursor, selectionFormat});
     }
     if (isAMessage && (MessageDelegateUtils::useItalicsForMessage(index) || MessageDelegateUtils::pendingMessage(index))) {
         QTextCursor cursor(doc);
         cursor.select(QTextCursor::Document);
         QTextCharFormat format;
         format.setForeground(Qt::gray); // TODO use color from theme.
         cursor.mergeCharFormat(format);
     }
     return selections;
 }
 
 void MessageDelegateUtils::drawSelection(QTextDocument *doc,
                                          QRect rect,
                                          int top,
                                          QPainter *painter,
                                          const QModelIndex &index,
                                          const QStyleOptionViewItem &option,
                                          TextSelection *selection,
                                          const MessageAttachment &msgAttach,
                                          const MessageUrl &msgUrl,
                                          bool isAMessage)
 {
     painter->save();
     painter->translate(rect.left(), top);
     const QRect clip(0, 0, rect.width(), rect.height());
 
     QAbstractTextDocumentLayout::PaintContext ctx;
     if (selection) {
         const QVector<QAbstractTextDocumentLayout::Selection> selections =
             MessageDelegateUtils::selection(selection, doc, index, option, msgAttach, msgUrl, isAMessage);
         // Same as pDoc->drawContents(painter, clip) but we also set selections
         ctx.selections = selections;
         if (clip.isValid()) {
             painter->setClipRect(clip);
             ctx.clip = clip;
         }
     }
     doc->documentLayout()->draw(painter, ctx);
     painter->restore();
 }
 
 void MessageDelegateUtils::setClipboardSelection(TextSelection *selection)
 {
     QClipboard *clipboard = QGuiApplication::clipboard();
     if (selection->hasSelection() && clipboard->supportsSelection()) {
         const QString text = selection->selectedText(TextSelection::Text);
         clipboard->setText(text, QClipboard::Selection);
     }
 }
 
 QSizeF MessageDelegateUtils::dprAwareSize(const QPixmap &pixmap)
 {
     if (pixmap.isNull()) {
         return {0, 0}; // prevent division-by-zero
     }
     return pixmap.size() / pixmap.devicePixelRatioF();
 }
 
 qreal MessageDelegateUtils::basicMargin()
 {
     return 8;
 }
 
 QSize MessageDelegateUtils::timeStampSize(const QString &timeStampText, const QStyleOptionViewItem &option)
 {
     // This gives incorrect results (too small bounding rect), no idea why!
     // const QSize timeSize = painter->fontMetrics().boundingRect(timeStampText).size();
     return {option.fontMetrics.horizontalAdvance(timeStampText), option.fontMetrics.height()};
 }
 
 QSize MessageDelegateUtils::textSizeHint(QTextDocument *doc, qreal *pBaseLine)
 {
     if (!doc) {
         return {};
     }
     const QSize size(doc->idealWidth(), doc->size().height()); // do the layouting, required by lineAt(0) below
 
     const QTextLine &line = doc->firstBlock().layout()->lineAt(0);
     *pBaseLine = line.y() + line.ascent(); // relative
 
     return size;
 }
 
 bool MessageDelegateUtils::showIgnoreMessages(const QModelIndex &index)
 {
     const bool isIgnoredMessage = index.data(MessagesModel::Ignored).toBool();
     const bool isDirectMessage = index.data(MessagesModel::DirectChannels).toBool();
     return isIgnoredMessage && !isDirectMessage;
 }