open specififed pdfviewer jumping to the page of the preveiw image

(cherry picked from commit 0bd429be1c9e16b96dd5e503265856107e55adaf)

gui/mainwindow.cpp

@@ -7,6 +7,7 @@
 #include <QClipboard>
 #include <QSettings>
 #include <QDateTime>
+#include <QProcess>
 #include "mainwindow.h"
 #include "ui_mainwindow.h"
 #include "clicklabel.h"
@@ -61,7 +62,28 @@ void MainWindow::pdfPreviewReceived(PdfPreview preview)
 	label->setPixmap(QPixmap::fromImage(preview.previewImage));
 	ui->scrollAreaWidgetContents->layout()->addWidget(label);
 	connect(label, &ClickLabel::clicked,
-			[=]() { QDesktopServices::openUrl(QUrl::fromLocalFile(preview.documentPath)); });
+			[=]()
+			{
+				QSettings settings;
+				QString command = settings.value("pdfviewer").toString();
+				qDebug() << command;
+				if(command != "" && command.contains("%p") && command.contains("%f"))
+				{
+					command = command.replace("%f", preview.documentPath);
+					command = command.replace("%p", QString::number(preview.page));
+					QStringList splitted = command.split(" ");
+					if(splitted.size() > 1)
+					{
+						QString cmd = splitted[0];
+						QStringList args = splitted.mid(1);
+						QProcess::startDetached(cmd, args);
+					}
+				}
+				else
+				{
+					QDesktopServices::openUrl(QUrl::fromLocalFile(preview.documentPath));
+				}
+			});
 }
 
 void MainWindow::lineEditReturnPressed()

gui/pdfpreview.h

@@ -8,6 +8,7 @@ class PdfPreview
 	PdfPreview();
 	QImage previewImage;
 	QString documentPath;
+	unsigned int page;
 };
 
 #endif // PDFPREVIEW_H

gui/pdfworker.cpp

@@ -28,6 +28,10 @@ void PdfWorker::generatePreviews(QVector<SearchResult> paths, double scalefactor
 	this->generating = true;
 	for(SearchResult &sr : paths)
 	{
+		if(this->cancelCurrent.load())
+		{
+			break;
+		}
 		Poppler::Document *doc = document(sr.path);
 		if(doc == nullptr)
 		{
@@ -48,12 +52,8 @@ void PdfWorker::generatePreviews(QVector<SearchResult> paths, double scalefactor
 		PdfPreview preview;
 		preview.previewImage = image;
 		preview.documentPath = sr.path;
+		preview.page = sr.page;
 		emit previewReady(preview);
-		if(this->cancelCurrent.load())
-		{
-
-			break;
-		}
 	}
 	isFreeMutex.lock();
 	isFree.wakeOne();