From 3004505832cbda8565ef871e50b8d282cdabf565 Mon Sep 17 00:00:00 2001
From: defnax <defnax@users.noreply.github.com>
Date: Mon, 17 Apr 2023 21:01:57 +0200
Subject: [PATCH] Added copy image to clipboard feature

---
 .../src/gui/common/RSTextBrowser.cpp          | 17 +++++++++++
 retroshare-gui/src/gui/common/RSTextBrowser.h |  1 +
 retroshare-gui/src/util/imageutil.cpp         | 30 +++++++++++++++++++
 retroshare-gui/src/util/imageutil.h           |  1 +
 4 files changed, 49 insertions(+)

diff --git a/retroshare-gui/src/gui/common/RSTextBrowser.cpp b/retroshare-gui/src/gui/common/RSTextBrowser.cpp
index 449f4e1c6..c3aaaf454 100644
--- a/retroshare-gui/src/gui/common/RSTextBrowser.cpp
+++ b/retroshare-gui/src/gui/common/RSTextBrowser.cpp
@@ -356,6 +356,11 @@ QMenu *RSTextBrowser::createStandardContextMenuFromPoint(const QPoint &widgetPos
 		a->setData(widgetPos);
 	}
 
+	if (checkImage(widgetPos)) {
+		a = menu->addAction( tr("Copy image"), this, SLOT(copyImage()));
+		a->setData(widgetPos);
+	}
+
 	return menu;
 }
 
@@ -389,3 +394,15 @@ void RSTextBrowser::saveImage()
 	QTextCursor cursor = cursorForPosition(point);
 	ImageUtil::extractImage(window(), cursor);
 }
+
+void RSTextBrowser::copyImage()
+{
+	QAction *action = dynamic_cast<QAction*>(sender()) ;
+	if (!action) {
+		return;
+	}
+
+	QPoint point = action->data().toPoint();
+	QTextCursor cursor = cursorForPosition(point);
+	ImageUtil::copyImage(window(), cursor);
+}
diff --git a/retroshare-gui/src/gui/common/RSTextBrowser.h b/retroshare-gui/src/gui/common/RSTextBrowser.h
index 04de979c5..120dd22e8 100644
--- a/retroshare-gui/src/gui/common/RSTextBrowser.h
+++ b/retroshare-gui/src/gui/common/RSTextBrowser.h
@@ -75,6 +75,7 @@ private slots:
 	void destroyImageBlockWidget();
 	void viewSource();
 	void saveImage();
+	void copyImage();
 
 protected:
 	void paintEvent(QPaintEvent *event);
diff --git a/retroshare-gui/src/util/imageutil.cpp b/retroshare-gui/src/util/imageutil.cpp
index d710a9ae3..9356ae3b2 100644
--- a/retroshare-gui/src/util/imageutil.cpp
+++ b/retroshare-gui/src/util/imageutil.cpp
@@ -25,6 +25,8 @@
 #include <QApplication>
 #include <QByteArray>
 #include <QImage>
+#include <QClipboard>
+#include <QMimeData>
 #include <QMessageBox>
 #include <QString>
 #include <QTextCursor>
@@ -68,6 +70,34 @@ void ImageUtil::extractImage(QWidget *window, QTextCursor cursor, QString file)
 	}
 }
 
+void ImageUtil::copyImage(QWidget *window, QTextCursor cursor)
+{
+	cursor.movePosition(QTextCursor::Left, QTextCursor::MoveAnchor, 1);
+	cursor.movePosition(QTextCursor::Right, QTextCursor::KeepAnchor, 2);
+	QString imagestr = cursor.selection().toHtml();
+	bool success = false;
+	int start = imagestr.indexOf("base64,") + 7;
+	int stop = imagestr.indexOf("\"", start);
+	int length = stop - start;
+	if((start >= 0) && (length > 0))
+	{
+		QByteArray ba = QByteArray::fromBase64(imagestr.mid(start, length).toLatin1());
+		QImage image = QImage::fromData(ba);
+		if(!image.isNull())
+		{
+			success = true;
+			QClipboard *clipboard = QApplication::clipboard();
+			QMimeData *data = new QMimeData;
+			data->setImageData(image);
+			clipboard->setMimeData(data, QClipboard::Clipboard);
+		}
+	}
+	if(!success)
+	{
+		QMessageBox::warning(window, QApplication::translate("ImageUtil", "Copy image"), QApplication::translate("ImageUtil", "Not an image"));
+	}
+}
+
 bool ImageUtil::optimizeSizeBytes(QByteArray &bytearray, const QImage &original, QImage &optimized, const char *format, int maxPixels, int maxBytes)
 {
 	//nothing to do if it fits into the limits
diff --git a/retroshare-gui/src/util/imageutil.h b/retroshare-gui/src/util/imageutil.h
index 9e5bf37cb..137c0ea8e 100644
--- a/retroshare-gui/src/util/imageutil.h
+++ b/retroshare-gui/src/util/imageutil.h
@@ -32,6 +32,7 @@ public:
 	ImageUtil();
 
 	static void extractImage(QWidget *window, QTextCursor cursor, QString file = "");
+	static void copyImage(QWidget *window, QTextCursor cursor);
     static bool optimizeSizeHtml(QString &html, const QImage& original, QImage &optimized, int maxPixels = -1, int maxBytes = -1);
     static bool optimizeSizeBytes(QByteArray &bytearray, const QImage &original, QImage &optimized, const char *format, int maxPixels, int maxBytes);
     static bool hasAlphaContent(const QImage& image);