/* eslint-disable no-var */
/* global $, Components, svgCanvas, netscape */
// Note: This JavaScript file must be included as the last script on the main HTML editor page to override the open/save handlers
$(function () {
	if (!window.Components) return;

	function mozFilePicker (readflag) {
		var fp = window.Components.classes['@mozilla.org/filepicker;1']
			.createInstance(Components.interfaces.nsIFilePicker);
		if (readflag) fp.init(window, 'Pick a SVG file', fp.modeOpen);
		else fp.init(window, 'Pick a SVG file', fp.modeSave);
		fp.defaultExtension = '*.svg';
		fp.show();
		return fp.file;
	}

	svgCanvas.setCustomHandlers({
		open: function () {
			try {
				netscape.security.PrivilegeManager.enablePrivilege('UniversalXPConnect');
				var file = mozFilePicker(true);
				if (!file) {
					return null;
				}

				var inputStream = Components.classes['@mozilla.org/network/file-input-stream;1'].createInstance(Components.interfaces.nsIFileInputStream);
				inputStream.init(file, 0x01, parseInt('00004', 8), null);
				var sInputStream = Components.classes['@mozilla.org/scriptableinputstream;1'].createInstance(Components.interfaces.nsIScriptableInputStream);
				sInputStream.init(inputStream);
				svgCanvas.setSvgString(sInputStream.read(sInputStream.available()));
			} catch (e) {
				console.log('Exception while attempting to load' + e);
			}
		},
		save: function (svg, str) {
			try {
				var file = mozFilePicker(false);
				if (!file) {
					return;
				}

				if (!file.exists()) {
					file.create(0, parseInt('0664', 8));
				}

				var out = Components.classes['@mozilla.org/network/file-output-stream;1'].createInstance(Components.interfaces.nsIFileOutputStream);
				out.init(file, 0x20 | 0x02, parseInt('00004', 8), null);
				out.write(str, str.length);
				out.flush();
				out.close();
			} catch (e) {
				alert(e);
			}
		}
	});
});