File indexing completed on 2024-06-23 05:14:19

 /*
     view/anchorcache.cpp
 
     This file is part of Kleopatra, the KDE keymanager
     SPDX-FileCopyrightText: 2022 g10 Code GmbH
     SPDX-FileContributor: Ingo Klöcker <dev@ingo-kloecker.de>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include <config-kleopatra.h>
 
 #include "anchorcache_p.h"
 
 #include <QTextBlock>
 #include <QTextCursor>
 #include <QTextDocument>
 
 void AnchorCache::setText(const QString &text)
 {
     mText = text;
     mAnchorsValid = false;
 }
 
 void AnchorCache::clear()
 {
     mText.clear();
     mAnchorsValid = false;
 }
 
 int AnchorCache::size() const
 {
     return anchors().size();
 }
 
 const AnchorData &AnchorCache::operator[](int index) const
 {
     return anchors()[index];
 }
 
 int AnchorCache::findAnchor(int start) const
 {
     anchors(); // ensure that the anchor cache is valid
     auto it = std::find_if(std::cbegin(mAnchors), std::cend(mAnchors), [start](const auto &anchor) {
         return anchor.start == start;
     });
     if (it != std::cend(mAnchors)) {
         return std::distance(std::cbegin(mAnchors), it);
     }
     return -1;
 }
 
 const std::vector<AnchorData> &AnchorCache::anchors() const
 {
     if (mAnchorsValid) {
         return mAnchors;
     }
 
     mAnchors.clear();
     if (mText.isEmpty()) {
         return mAnchors;
     }
 
     QTextDocument doc;
     doc.setHtml(mText);
 
     // taken from QWidgetTextControl::setFocusToNextOrPreviousAnchor and QWidgetTextControl::findNextPrevAnchor
     for (QTextBlock block = doc.begin(); block.isValid(); block = block.next()) {
         QTextBlock::Iterator it = block.begin();
 
         while (!it.atEnd()) {
             const QTextFragment fragment = it.fragment();
             const QTextCharFormat fmt = fragment.charFormat();
 
             if (fmt.isAnchor() && fmt.hasProperty(QTextFormat::AnchorHref)) {
                 const int anchorStart = fragment.position();
                 const QString anchorHref = fmt.anchorHref();
                 int anchorEnd = -1;
 
                 // find next non-anchor fragment
                 for (; !it.atEnd(); ++it) {
                     const QTextFragment fragment = it.fragment();
                     const QTextCharFormat fmt = fragment.charFormat();
 
                     if (!fmt.isAnchor() || fmt.anchorHref() != anchorHref) {
                         anchorEnd = fragment.position();
                         break;
                     }
                 }
 
                 if (anchorEnd == -1) {
                     anchorEnd = block.position() + block.length() - 1;
                 }
 
                 QTextCursor cursor{&doc};
                 cursor.setPosition(anchorStart);
                 cursor.setPosition(anchorEnd, QTextCursor::KeepAnchor);
                 QString anchorText = cursor.selectedText();
                 mAnchors.push_back({anchorStart, anchorEnd, anchorText, anchorHref});
             } else {
                 ++it;
             }
         }
     }
 
     mAnchorsValid = true;
     return mAnchors;
 }