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Added patch from braindead

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Embedded images in private chat and messages (only for QT version 4.7.0 and higher)

git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@5569 b45a01b8-16f6-495d-af2f-9b41ad6348cc
This commit is contained in:
thunder2 2012-09-18 22:59:23 +00:00
parent 4d452b4034
commit 02892d4ae5
7 changed files with 3524 additions and 159 deletions
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63
retroshare-gui/src/util/HandleRichText.cpp
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@ -19,8 +19,12 @@
* Boston, MA 02110-1301, USA.
****************************************************************/
#include <QApplication>
#include <QTextBrowser>
#include <QtXml>
#include <QBuffer>
#include <QMessageBox>
#include <qmath.h>
#include "HandleRichText.h"
#include "gui/RetroShareLink.h"
@ -625,3 +629,62 @@ QString RsHtml::toHtml(QString text, bool realHtml)
doc.setHtml(text);
return doc.toHtml();
}
/** Loads image and converts image to embedded image HTML fragment **/
bool RsHtml::makeEmbeddedImage(const QString &fileName, QString &embeddedImage, const int maxPixels)
{
QImage image;
if (image.load (fileName) == false) {
fprintf (stderr, "RsHtml::makeEmbeddedImage() - image \"%s\" can't be load", fileName.toAscii().constData());
return false;
}
return RsHtml::makeEmbeddedImage(image, embeddedImage, maxPixels);
}
/** Converts image to embedded image HTML fragment **/
bool RsHtml::makeEmbeddedImage(const QImage &originalImage, QString &embeddedImage, const int maxPixels)
{
QByteArray bytearray;
QBuffer buffer(&bytearray);
QImage resizedImage;
const QImage *image = &originalImage;
if (maxPixels > 0) {
QSize imgSize = originalImage.size();
if ((imgSize.height() * imgSize.width()) > maxPixels) {
// image is too large - resize keeping aspect ratio
QSize newSize;
newSize.setWidth(int(qSqrt((maxPixels * imgSize.width()) / imgSize.height())));
newSize.setHeight(int((imgSize.height() * newSize.width()) / imgSize.width()));
// ask user
QMessageBox msgBox;
msgBox.setText(QString(QApplication::translate("RsHtml", "Image is oversized for transmission.\nReducing image to %1x%2 pixels?", 0, QApplication::UnicodeUTF8)).arg(newSize.width()).arg(newSize.height()));
msgBox.setStandardButtons(QMessageBox::Ok | QMessageBox::Cancel);
msgBox.setDefaultButton(QMessageBox::Ok);
if (msgBox.exec() != QMessageBox::Ok) {
return false;
}
resizedImage = originalImage.scaled(newSize, Qt::KeepAspectRatio, Qt::SmoothTransformation);
image = &resizedImage;
}
}
if (buffer.open(QIODevice::WriteOnly)) {
if (image->save(&buffer, "PNG")) {
QByteArray encodedByteArray = bytearray.toBase64();
embeddedImage = "<img src=\"data:image/png;base64,";
embeddedImage.append(encodedByteArray);
embeddedImage.append("\">");
} else {
fprintf (stderr, "RsHtml::makeEmbeddedImage() - image can't be saved to buffer");
return false;
}
} else {
fprintf (stderr, "RsHtml::makeEmbeddedImage() - buffer can't be opened");
return false;
}
return true;
}