{
  "prefbar:info": {
    "formatversion": 3
  },
  "prefbar:menu:enabled": {
    "items": [
      "prefbar:button:pagetojpeg"
    ]
  },
  "prefbar:button:pagetojpeg": {
    "type": "button",
    "label": "page2image",
    "onclick": "// Page2Image Button for PrefBar\n// Copyright (C) Manuel Reimer (Manuel _dot_ Reimer _at_ gmx _dot_ de)\n// This program is free software; you can redistribute it and/or\n// modify it under the terms of the GNU General Public License\n// version 3 as published by the Free Software Foundation\n\nvar preflasttype = \"extensions.prefbar.buttons.pagetojpeg.lasttype\";\n\n// http://weblogs.mozillazine.org/roc/archives/2005/05/rendering_web_p.html\n\nfunction main() {\n  //\n  // Generate the \"screenshot\" of the full page\n  //\n  var mainwin = document.getElementById(\"main-window\");\n  if (!mainwin.getAttribute(\"xmlns:html\"))\n    mainwin.setAttribute(\"xmlns:html\", \"http://www.w3.org/1999/xhtml\");\n\n  var content = window.content;\n\n  var desth = content.innerHeight + content.scrollMaxY;\n  var destw = content.innerWidth + content.scrollMaxX;\n\n  // Unfortunately there is a limit:\n  if (desth > 16384) desth = 16384;\n\n  var canvas = document.createElementNS(\"http://www.w3.org/1999/xhtml\", \"html:canvas\");\n  var ctx = canvas.getContext(\"2d\");\n\n  canvas.height = desth;\n  canvas.width = destw;\n  ctx.drawWindow(content, 0, 0, destw, desth, \"rgb(0,0,0)\");\n\n  //\n  // Ask the user, where he wants to have the file\n  //\n  const nsIFilePicker = Components.interfaces.nsIFilePicker;\n  var fp = Components.classes[\"@mozilla.org/filepicker;1\"]\n    .createInstance(nsIFilePicker);\n  fp.init(window, \"PrefBar page2image button\", nsIFilePicker.modeSave);\n  fp.filterIndex = goPrefBar.GetPref(preflasttype, 0);\n  fp.appendFilter(\"PNG image\", \"*.png\");\n  fp.appendFilter(\"JPEG image\", \"*.jpg\");\n  fp.defaultString = (fp.filterIndex == 0) ? \"saved_page.png\" : \"saved_page.jpg\";\n  var rv = fp.show();\n  if (rv == nsIFilePicker.returnCancel) return;\n  goPrefBar.SetPref(preflasttype, fp.filterIndex);\n\n  //\n  // Generate the image\n  //\n  var imgdata;\n  switch (fp.filterIndex) {\n    case 0:\n      imgdata = canvas.toDataURL(\"image/png\", \"transparency=none\");\n      break;\n    default:\n      imgdata = canvas.toDataURL(\"image/jpeg\", \"quality=80\");\n  }\n\n  var ioserv = Components.classes[\"@mozilla.org/network/io-service;1\"]\n                         .getService(Components.interfaces.nsIIOService);\n  var channel = ioserv.newChannel(imgdata, 0, null);\n  var istream = channel.open();\n  var bstream = Components.classes[\"@mozilla.org/binaryinputstream;1\"]\n                          .createInstance(Components.interfaces.nsIBinaryInputStream);\n  bstream.setInputStream(istream);\n  var bytes = bstream.readBytes(bstream.available());\n  var stream = Components.classes[\"@mozilla.org/network/safe-file-output-stream;1\"]\n                         .createInstance(Components.interfaces.nsIFileOutputStream);\n  stream.init(fp.file, 0x04 | 0x08 | 0x20, -1, 0); // write, create, truncate\n  stream.write(bytes, bytes.length);\n  if (stream instanceof Components.interfaces.nsISafeOutputStream) {\n    stream.finish();\n  } else {\n    stream.close();\n  }\n}\n\nmain();"
  }
}