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anchorcache.cpp
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anchorcache.cpp
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/*
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;
}

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