add plugin exporting to filename derived from xopp

plugins/Export/main.lua

@@ -0,0 +1,36 @@
+-- Register all Toolbar actions and intialize all UI stuff
+function initUi()
+  app.registerUi({["menu"] = "Export to pdf", ["callback"] = "exportPdf", ["accelerator"] = "<Shift><Alt>p"});
+  app.registerUi({["menu"] = "Export to svg", ["callback"] = "exportSvg", ["accelerator"] = "<Shift><Alt>s"});
+  app.registerUi({["menu"] = "Export to png", ["callback"] = "exportPng", ["accelerator"] = "<Shift><Alt>n"});
+end
+
+local DEFAULT_PATH = "/tmp/temp"  -- change this to get a different default path for xopp-files that have not been saved yet
+
+function exportPdf()
+  local pdfName = getStem() .. "_export.pdf"
+  app.export({["outputFile"] = pdfName})
+  -- use the "range", "background" and "progressiveMode" fields for more customization
+end
+
+function exportSvg()  
+  local svgName = getStem() .. "_export.svg"
+  app.export({["outputFile"] = svgName})
+  -- use the "range", "background" for more customization
+end
+
+function exportPng()
+  local pngName = getStem() .. "_export.png"
+  app.export({["outputFile"] = pngName})
+  -- use the "range", "background" and "pngDpi", "pngWidth" or "pngHeight" fields for more customization
+end
+
+function getStem()
+  local xoppName = app.getDocumentStructure()["xoppFilename"]
+  if (xoppName ~= "" and xoppName ~= nil) then 
+    return xoppName:match("(.+)%..+$")
+  else
+    print("Exporting to default path. Consider saving the xopp-file before exporting! ")
+    return DEFAULT_PATH
+  end
+end

plugins/Export/plugin.ini

@@ -0,0 +1,15 @@
+[about]
+## Author / Copyright notice
+author=Roland Lötscher
+
+description=Export to pdf, svg and png.
+
+## If the plugin is packed with Xournal++, use
+## <xournalpp> then it gets the same version number
+version=<xournalpp>
+
+[default]
+enabled=false
+
+[plugin]
+mainfile=main.lua