add checkoutTo and open functionality

src/git/Commit.cpp

@@ -357,4 +357,37 @@ void Commit::setEmojiFile(const QString &file)
   sEmojiFile = file;
 }
 
+Blob Commit::blob(const QString& file) const{
+	git::Blob blob;
+
+	if (!isValid())
+		return blob;
+
+	// searching for the correct blob
+	auto list = file.split("/");
+	bool found = false;
+	auto t = tree();
+	if (!t.isValid())
+		return blob;
+
+	for (int path_depth = 0; path_depth < list.count(); path_depth++) {
+	  auto element = list[path_depth];
+	  found = false;
+	  for (int i = 0; i < t.count(); ++i) {
+		auto n = t.name(i);
+		if (n == element) {
+		  if (path_depth >= list.count() -1)
+			blob = t.object(i);
+		  else
+			t = t.object(i);
+		  found = true;
+		  break;
+		}
+	  }
+	  if (!found)
+		break;
+	}
+	return blob;
+}
+
 } // namespace git

src/git/Commit.h

@@ -14,6 +14,7 @@
 #include "git2/commit.h"
 #include "git2/revwalk.h"
 #include "git2/reset.h"
+#include "Blob.h"
 
 class QDateTime;
 
@@ -87,6 +88,8 @@ public:
   // any commits are created and is not expected to change.
   static void setEmojiFile(const QString &file);
 
+  Blob blob(const QString& file) const;
+
 private:
   Commit(git_commit *commit);
   operator git_commit *() const;

src/ui/FileContextMenu.cpp

@@ -21,6 +21,8 @@
 #include <QDir>
 #include <QMessageBox>
 #include <QPushButton>
+#include <QFileDialog>
+#include <QDesktopServices>
 
 namespace {
 
@@ -234,8 +236,66 @@ FileContextMenu::FileContextMenu(
       view->setViewMode(RepoView::DoubleTree);
     });
 
-    checkout->setEnabled(!view->repo().isBare());
+    // Checkout to ...
+	QAction *checkoutTo = addAction(tr("Save Selected Version as ..."), [this, view, files] {
+      QFileDialog d(this);
+      d.setFileMode(QFileDialog::FileMode::Directory);
+      d.setOption(QFileDialog::ShowDirsOnly);
+	  d.setWindowTitle(tr("Select new file directory"));
+      if (d.exec()) {
+		  const auto folder = d.selectedFiles().first();
+		  const auto save = view->addLogEntry(tr("Saving files"), tr("Saving files of selected version to disk"));
+			for (const auto& file: files) {
+				const auto saveFile = view->addLogEntry(tr("Save file ") + file, "Save file", save);
+				// assumption. file is a file not a folder!
+				if (!exportFile(view, folder, file))
+					view->error(saveFile, "save file", file, tr("Invalid Blob"));
+			}
+          view->setViewMode(RepoView::DoubleTree);
+      }
+	  return true;
+      });
 
+	QAction *open = addAction(tr("Open this version"), [this, view, files] {
+	  QString folder = QDir::tempPath();
+	  const auto& file = files.first();
+	  auto filename = file.split("/").last();
+
+	  auto logentry = view->addLogEntry(tr("Opening file"), tr("Open ") + filename);
+
+	  if (exportFile(view, folder, file))
+		QDesktopServices::openUrl(QUrl::fromLocalFile(QFileInfo(folder + "/" + filename).absoluteFilePath()));
+	  else
+		  view->error(logentry, tr("open file"), filename, tr("Blob is invalid."));
+	});
+
+	// should show a dialog to select an application
+	// Don't forgett to uncomment "openWith->setEnabled(!isBare);" below
+//	QAction *openWith = addAction(tr("Open this Version with ..."), [this, view, files] {
+//	  QString folder = QDir::tempPath();
+//	  const auto& file = files.first();
+//	  auto filename = file.split("/").last();
+
+//	  auto logentry = view->addLogEntry(tr("Opening file with ..."), tr("Open ") + filename);
+
+//	  if (exportFile(view, folder, file))
+//		QDesktopServices::openUrl(QUrl::fromLocalFile(QFileInfo(folder + "/" + filename).absoluteFilePath()));
+//	  else
+//		view->error(logentry, tr("open file"), filename, tr("Blob is invalid."));
+//	});
+
+    auto isBare = view->repo().isBare();
+    const auto blob = view->commits().first().blob(files.first());
+    checkout->setEnabled(!isBare);
+	checkout->setToolTip(!isBare ? "" : tr("Unable to checkout bare repositories"));
+    checkoutTo->setEnabled(!isBare && blob.isValid());
+	checkoutTo->setToolTip(!isBare ? "" : tr("Unable to checkout bare repositories"));
+	open->setEnabled(!isBare && blob.isValid());
+	open->setToolTip(!isBare ? "" : tr("Unable to open files from bare repository"));
+	//openWith->setEnabled(!isBare && blob.isValid());
+
+	/* disable checkout if the file is already
+	 * in the current working directory */
     git::Commit commit = commits.first();
     foreach (const QString &file, files) {
       if (commit.tree().id(file) == repo.workdirId(file)) {
@@ -348,6 +408,21 @@ void FileContextMenu::ignoreFile()
  }
 }
 
+bool FileContextMenu::exportFile(const RepoView* view, const QString& folder, const QString& file) {
+	const auto blob = view->commits().first().blob(file);
+	if (!blob.isValid())
+		return false;
+
+	auto filename = file.split("/").last();
+	QFile f(folder + "/" + filename);
+	if (!f.open(QFile::ReadWrite))
+	  return false;
+
+	f.write(blob.content());
+	f.close();
+	return true;
+}
+
 void FileContextMenu::addExternalToolsAction(
   const QList<ExternalTool *> &tools)
 {

src/ui/FileContextMenu.h

@@ -31,6 +31,7 @@ private slots:
   void ignoreFile();
 private:
   void addExternalToolsAction(const QList<ExternalTool *> &tools);
+  bool exportFile(const RepoView *view, const QString& folder, const QString& file);
 
   RepoView *mView;
   const QStringList &mFiles;

src/ui/RepoView.h

@@ -141,10 +141,29 @@ public:
   bool isLogVisible() const;
   void setLogVisible(bool visible);
 
+  /*!
+   * \brief addLogEntry
+   * \param text The text which is shown after the title
+   * \param title The text which is shown in bold
+   * \param parent
+   * \return
+   */
   LogEntry *addLogEntry(
     const QString &text,
     const QString &title,
     LogEntry *parent = nullptr);
+
+  /*!
+   * \brief error
+   * \param parent
+   * \param action The Action text
+   * \param name
+   * \param defaultError
+   *
+   * Example:
+   * Unable to Action 'Name' - the path
+   * \return
+   */
   LogEntry *error(
     LogEntry *parent,
     const QString &action,