File indexing completed on 2024-05-12 16:27:34

 /*
    SPDX-FileCopyrightText: 2021-2024 Laurent Montel <montel@kde.org>
 
    SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #include "roomheaderlabel.h"
 
 #include <KLocalizedString>
 #include <QDesktopServices>
 #include <QTextDocument>
 
 RoomHeaderLabel::RoomHeaderLabel(QWidget *parent)
     : QLabel(parent)
 {
     setWordWrap(true);
     setTextInteractionFlags(Qt::TextBrowserInteraction);
     setTextFormat(Qt::RichText);
     setVisible(false);
     connect(this, &QLabel::linkActivated, this, &RoomHeaderLabel::slotMoreInfo);
 }
 
 RoomHeaderLabel::~RoomHeaderLabel() = default;
 
 void RoomHeaderLabel::resizeEvent(QResizeEvent *ev)
 {
     QLabel::resizeEvent(ev);
     updateSqueezedText();
 }
 
 void RoomHeaderLabel::updateSqueezedText()
 {
     setToolTip(QString());
 
     if (mFullText.isEmpty()) {
         QLabel::setText(QString());
         setVisible(false);
         return;
     }
     setVisible(true);
     const QString text = rPixelSqueeze(mFullText, width() - 10);
     QLabel::setText(QLatin1String("<qt>") + text + QLatin1String("</qt>"));
     if (mFullText != text && !mExpandTopic) {
         setToolTip(mFullText);
     }
 }
 
 void RoomHeaderLabel::slotMoreInfo(const QString &content)
 {
     if (content == QLatin1String("showmoretext")) {
         mExpandTopic = true;
         updateSqueezedText();
     } else if (content == QLatin1String("showlesstext")) {
         mExpandTopic = false;
         updateSqueezedText();
     } else {
         QDesktopServices::openUrl(QUrl(content));
     }
 }
 
 QString RoomHeaderLabel::rPixelSqueeze(const QString &text, int maxPixels) const
 {
     const auto tSize = textSize(text);
     int tHeight = tSize.height();
     int tw = tSize.width();
     QString tmp = text;
     const QString showMoreText = i18n("(Show More Info...)");
     if (tHeight > (3 * fontMetrics().ascent() + fontMetrics().descent())) {
         if (!mExpandTopic) {
             if (tw > maxPixels) {
                 int em = fontMetrics().maxWidth();
                 maxPixels -= fontMetrics().horizontalAdvance(showMoreText);
 
                 // On some MacOS system, maxWidth may return 0
                 if (em == 0) {
                     for (QChar c : text) {
                         em = qMax(em, fontMetrics().horizontalAdvance(c));
                     }
                 }
                 while ((tw > maxPixels) && !tmp.isEmpty()) {
                     const int len = tmp.length();
                     int delta = (em == 0) ? 0 : (tw - maxPixels) / em;
                     delta = qBound(1, delta, len);
 
                     tmp.remove(len - delta, delta);
                     tw = textSize(tmp).width();
                 }
             } else {
                 tmp = tmp.split(QStringLiteral("\n")).at(0);
             }
             if (!tmp.endsWith(QLatin1Char('\n'))) {
                 tmp.append(QLatin1Char('\n'));
             }
             return tmp.append(QStringLiteral("<a href=\"showmoretext\"> %1</a>").arg(showMoreText));
         } else {
             if (!tmp.endsWith(QLatin1Char('\n'))) {
                 tmp.append(QLatin1Char('\n'));
             }
             return tmp.append(QStringLiteral("<a href=\"showlesstext\"> %1</a>").arg(i18n("(Show Less Info...)")));
         }
     }
     return text;
 }
 
 QSize RoomHeaderLabel::textSize(const QString &text) const
 {
     QTextDocument document;
     document.setDefaultFont(font());
     document.setHtml(QLatin1String("<qt>") + text + QLatin1String("</qt>"));
 
     return document.size().toSize();
 }
 
 const QString &RoomHeaderLabel::fullText() const
 {
     return mFullText;
 }
 
 void RoomHeaderLabel::setRoomAnnouncement(const QString &announcement)
 {
     mAnnouncement = announcement;
     updateHeaderText();
 }
 
 void RoomHeaderLabel::setRoomTopic(const QString &topic)
 {
     mTopic = topic;
     updateHeaderText();
 }
 
 void RoomHeaderLabel::updateHeaderText()
 {
     mFullText.clear();
     if (!mTopic.isEmpty()) {
         mFullText = mTopic;
     }
     if (!mAnnouncement.isEmpty()) {
         if (!mFullText.isEmpty()) {
             mFullText += QLatin1Char('\n');
         }
         mFullText += mAnnouncement;
     }
     updateSqueezedText();
 }
 
 #include "moc_roomheaderlabel.cpp"