File indexing completed on 2024-05-12 05:04:25

 /**
  * SPDX-FileCopyrightText: 2023 Janet Black
  *
  * SPDX-License-Identifier: LGPL-2.0-or-later
  */
 
 #include "textpreprocessing.h"
 
 #include <QQuickTextDocument>
 #include <QTextBlock>
 #include <QTextCursor>
 #include <QTextDocument>
 
 TextPreprocessing::TextPreprocessing(QObject *parent)
     : QObject(parent)
 {
 }
 
 TextPreprocessing::~TextPreprocessing()
 {
 }
 
 static const auto fsi = QStringLiteral("\u2068");
 static const auto pdi = QStringLiteral("\u2069");
 static const auto lineSeparator = QStringLiteral("\u2028");
 
 QString TextPreprocessing::preprocessHTML(const QString &html, const QColor &linkColor)
 {
     QTextDocument doc;
     doc.setHtml(html);
 
     // transform mentions into isolates
     // this causes mentions to effectively be treated as opaque and non-text for
     // the purposes of the bidirectionality algorithim, which is how users expect
     // them to behave
     // pt 1 of 475043 fix
     for (auto block = doc.begin(); block != doc.end(); block = block.next()) {
         for (auto fragment = block.begin(); fragment != block.end(); fragment++) {
             auto it = fragment.fragment();
 
             if (it.charFormat().isAnchor() && it.text().startsWith(QStringLiteral("@"))) {
                 QTextCursor curs(&doc);
                 curs.setPosition(it.position(), QTextCursor::MoveAnchor);
                 curs.setPosition(it.position() + it.length(), QTextCursor::KeepAnchor);
                 curs.insertText(fsi + it.text() + pdi);
             }
 
             // while we're iterating through fragments we might as well set the kirigami
             // link colour here
             if (it.charFormat().isAnchor()) {
                 auto format = it.charFormat();
                 format.setForeground(linkColor);
                 format.setFontUnderline(false);
                 format.setUnderlineStyle(QTextCharFormat::NoUnderline);
 
                 QTextCursor curs(&doc);
                 curs.setPosition(it.position(), QTextCursor::MoveAnchor);
                 curs.setPosition(it.position() + it.length(), QTextCursor::KeepAnchor);
                 curs.setCharFormat(format);
             }
         }
     }
 
     // split apart <br> into different text blocks
     // so that different spans can have different layout directions
     // better matching bidirectionality behaviour that users are expecting
     // pt 2 of 475043 fix
     for (auto cursor = doc.find(lineSeparator); !cursor.isNull(); cursor = doc.find(lineSeparator, cursor)) {
         cursor.insertBlock();
     }
 
     return doc.toHtml();
 }
 
 #include "moc_textpreprocessing.cpp"