Add a new type of menu plugin: jsonmenu

This is a recursive, auto-generating menu which runs an external utility (a script of some kind usually), which generates a JSON document/object which is used to populate the menu.
Syntax:
(Per object)
{
 "type" : "item",
 "icon" : "icon name (optional)",
 "action" : "something lumina-open can run (optional)"
}
Or for a recursive menu generation
{
 "type" : "jsonmenu",
 "exec" : "some command to run to populate menu",
 "icon" : "icon name (optional)"
}

Example for a full return:
{
 "Item1" : {
    "type" : "item",
    "icon" : "folder",
    "action" : "~/item1.jpg"
  },
 "Menu1" : {
    "type" : "jsonmenu",
    "exec" : "some script",
    "icon" : "system-run"
  }
}
Item1 will open ~/item1.jpg with lumina-open when clicked, while Menu1 will call "some script" to generate a new menu with additional options.

}

1 files changed, 68 insertions, 0 deletions

diff --git a/src-qt5/core/lumina-desktop/JsonMenu.h b/src-qt5/core/lumina-desktop/JsonMenu.h
new file mode 100644
index 00000000..fbb80d28
--- /dev/null
+++ b/src-qt5/core/lumina-desktop/JsonMenu.h
@@ -0,0 +1,68 @@
+//===========================================
+//  Lumina Desktop source code
+//  Copyright (c) 2016, Ken Moore
+//  Available under the 3-clause BSD license
+//  See the LICENSE file for full details
+//===========================================
+//  This menu is used to automatically generate menu contents 
+//    based on the JSON output of an external script/utility
+//===========================================
+#ifndef _LUMINA_DESKTOP_JSON_MENU_H
+#define _LUMINA_DESKTOP_JSON_MENU_H
+
+#include <QMenu>
+#include <QString>
+#include <QJsonDocument>
+#include <QJsonObject>
+#include <QJsonArray>
+
+#include <LuminaUtils.h>
+#include <LuminaXDG.h>
+
+class JsonMenu : public QMenu{
+	Q_OBJECT
+private:
+	QString exec;
+
+public:
+	JsonMenu(QString execpath, QWidget *parent = 0) : QMenu(parent){
+	  exec = execpath;
+	  connect(this, SIGNAL(aboutToShow()), this, SLOT(updateMenu()) );
+	}
+
+private slots:
+	void parseObject(QString label, QJsonObject obj){
+	  if( label.isEmpty() || !obj.contains("type") ){ return; }
+          QString type = obj.value("type").toString();
+	  if(type.toLower()=="item"){
+	    QAction *act = this->addAction(label);
+	    if(obj.contains("icon")){ act->setIcon( LXDG::findIcon(obj.value("icon").toString(),"") ); }
+	    if(obj.contains("action")){ act->setWhatsThis( obj.value("action").toString() ); }
+	    else{ act->setEnabled(false); } //not interactive
+	  }else if(type.toLower()=="menu"){
+	    
+	  }else if(type.toLower()=="jsonmenu"){
+	    //This is a recursive JSON menu object
+	    if(!obj.contains("exec")){ return; }
+	    JsonMenu *menu = new JsonMenu(obj.value("exec").toString(), this);
+	      menu->setTitle(label);
+	      if(obj.contains("icon")){ menu->setIcon(LXDG::findIcon(obj.value("icon").toString(),"") ); }
+	    this->addMenu(menu);
+	  }
+	}
+	void updateMenu(){
+          this->clear();
+	  QJsonDocument doc = QJsonDocument::fromJson( LUtils::getCmdOutput(exec).join(" ").toLocal8Bit() );
+          if(doc.isNull() || !doc.isObject()){
+	    this->addAction( QString(tr("Error parsing script output: %1")).arg("\n"+exec) )->setEnabled(false);
+	  }else{
+	    QStringList keys = doc.object().keys();
+	    for(int i=0; i<keys.length(); i++){
+	      if(doc.object().value(keys[i]).isObject()){
+	        parseObject(keys[i], doc.object().value(keys[i]).toObject());
+	      }
+	    }
+	  }
+	}
+};
+#endif