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Request inline images in the right size and anti-alias them

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- If an inline image has specified a height, add parameters to the
  image:// URI.
- Add scaled to the parameters, the images would be cropped otherwise.
- Extract the height from image:// URI and use it for requestSize.
- Use scaledToHeight instead of scaled.
This commit is contained in:
tastytea 2021-12-27 00:17:27 +01:00
parent 7742f12f30
commit 7086e23bdd
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GPG key ID: CFC39497F1B26E07
2 changed files with 39 additions and 9 deletions
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16
src/MxcImageProvider.cpp
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@ -27,6 +27,7 @@ MxcImageProvider::requestImageResponse(const QString &id, const QSize &requested
auto id_ = id;
bool crop = true;
double radius = 0;
auto size = requestedSize;
auto queryStart = id.lastIndexOf('?');
if (queryStart != -1) {
@ -39,11 +40,14 @@ MxcImageProvider::requestImageResponse(const QString &id, const QSize &requested
crop = false;
} else if (b.startsWith("radius=")) {
radius = b.mid(7).toDouble();
} else if (b.startsWith("height=")) {
size.setHeight(b.mid(7).toInt());
size.setWidth(0);
}
}
}
return new MxcImageResponse(id_, crop, radius, requestedSize);
return new MxcImageResponse(id_, crop, radius, size);
}
void
@ -120,7 +124,9 @@ MxcImageProvider::download(const QString &id,
if (fileInfo.exists()) {
QImage image = utils::readImageFromFile(fileInfo.absoluteFilePath());
if (!image.isNull()) {
image = image.scaled(requestedSize, Qt::KeepAspectRatio, Qt::SmoothTransformation);
if (requestedSize != image.size()) {
image = image.scaledToHeight(requestedSize.height(), Qt::SmoothTransformation);
}
if (radius != 0) {
image = clipRadius(std::move(image), radius);
@ -151,8 +157,10 @@ MxcImageProvider::download(const QString &id,
auto data = QByteArray(res.data(), (int)res.size());
QImage image = utils::readImage(data);
if (!image.isNull()) {
image =
image.scaled(requestedSize, Qt::KeepAspectRatio, Qt::SmoothTransformation);
if (requestedSize != image.size()) {
image =
image.scaledToHeight(requestedSize.height(), Qt::SmoothTransformation);
}
if (radius != 0) {
image = clipRadius(std::move(image), radius);

32
src/timeline/TimelineModel.cpp
View file

@ -561,15 +561,37 @@ TimelineModel::data(const mtx::events::collections::TimelineEvents &event, int r
}
// TODO(Nico): Don't parse html with a regex
const static QRegularExpression matchImgUri("(<img [^>]*)src=\"mxc://([^\"]*)\"([^>]*>)");
formattedBody_.replace(matchImgUri, "\\1 src=\"image://mxcImage/\\2\"\\3");
// Same regex but for single quotes around the src
const static QRegularExpression matchImgUri2("(<img [^>]*)src=\'mxc://([^\']*)\'([^>]*>)");
formattedBody_.replace(matchImgUri2, "\\1 src=\"image://mxcImage/\\2\"\\3");
const static QRegularExpression matchEmoticonHeight(
"(<img data-mx-emoticon [^>]*)height=\"([^\"]*)\"([^>]*>)");
formattedBody_.replace(matchEmoticonHeight, QString("\\1 height=\"%1\"\\3").arg(ascent));
const static QRegularExpression matchIsImg("<img [^>]+>");
auto itIsImg = matchIsImg.globalMatch(formattedBody_);
while (itIsImg.hasNext()) {
const QString curImg = itIsImg.next().captured(0);
// Construct image parameters later used by MxcImageProvider.
QString imgParams;
if (curImg.contains("height")) {
const static QRegularExpression matchImgHeight("height=[\"\']?(\\d+)[\"\']?");
const auto height = matchImgHeight.match(curImg).captured(1).toInt();
imgParams = QString("?scale&height=%1").arg(height);
}
// Replace src in current <img>.
auto imgReplacement = curImg;
const static QRegularExpression matchImgUri("src=\"mxc://([^\"]*)\"");
imgReplacement.replace(matchImgUri,
QString("src=\"image://mxcImage/\\1%1\"").arg(imgParams));
// Same regex but for single quotes around the src
const static QRegularExpression matchImgUri2("src=\'mxc://([^\']*)\'");
imgReplacement.replace(matchImgUri2,
QString("src=\'image://mxcImage/\\1%1\'").arg(imgParams));
// Replace <img> in formattedBody_ with our new <img>.
formattedBody_.replace(curImg, imgReplacement);
}
return QVariant(
utils::replaceEmoji(utils::linkifyMessage(utils::escapeBlacklistedHtml(formattedBody_))));
}