104 lines
2.8 KiB
JavaScript
104 lines
2.8 KiB
JavaScript
/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
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/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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const { Cu, Cc, Ci } = require("chrome");
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const Services = require("Services");
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const { getMostRecentBrowserWindow } = require("sdk/window/utils");
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const OPEN_FLAGS = {
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RDONLY: parseInt("0x01", 16),
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WRONLY: parseInt("0x02", 16),
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CREATE_FILE: parseInt("0x08", 16),
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APPEND: parseInt("0x10", 16),
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TRUNCATE: parseInt("0x20", 16),
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EXCL: parseInt("0x80", 16)
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};
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/**
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* Open File Save As dialog and let the user to pick proper file location.
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*/
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exports.getTargetFile = function () {
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let fp = Cc["@mozilla.org/filepicker;1"].createInstance(Ci.nsIFilePicker);
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let win = getMostRecentBrowserWindow();
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fp.init(win, null, Ci.nsIFilePicker.modeSave);
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fp.appendFilter("JSON Files", "*.json; *.jsonp;");
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fp.appendFilters(Ci.nsIFilePicker.filterText);
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fp.appendFilters(Ci.nsIFilePicker.filterAll);
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fp.filterIndex = 0;
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let rv = fp.show();
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if (rv == Ci.nsIFilePicker.returnOK || rv == Ci.nsIFilePicker.returnReplace) {
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return fp.file;
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}
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return null;
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};
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/**
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* Save JSON to a file
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*/
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exports.saveToFile = function (file, jsonString) {
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let foStream = Cc["@mozilla.org/network/file-output-stream;1"]
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.createInstance(Ci.nsIFileOutputStream);
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// write, create, truncate
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let openFlags = OPEN_FLAGS.WRONLY | OPEN_FLAGS.CREATE_FILE |
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OPEN_FLAGS.TRUNCATE;
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let permFlags = parseInt("0666", 8);
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foStream.init(file, openFlags, permFlags, 0);
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let converter = Cc["@mozilla.org/intl/converter-output-stream;1"]
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.createInstance(Ci.nsIConverterOutputStream);
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converter.init(foStream, "UTF-8", 0, 0);
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// The entire jsonString can be huge so, write the data in chunks.
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let chunkLength = 1024 * 1204;
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for (let i = 0; i <= jsonString.length; i++) {
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let data = jsonString.substr(i, chunkLength + 1);
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if (data) {
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converter.writeString(data);
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}
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i = i + chunkLength;
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}
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// this closes foStream
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converter.close();
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};
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/**
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* Get the current theme from preferences.
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*/
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exports.getCurrentTheme = function () {
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return Services.prefs.getCharPref("devtools.theme");
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};
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/**
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* Export given object into the target window scope.
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*/
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exports.exportIntoContentScope = function (win, obj, defineAs) {
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let clone = Cu.createObjectIn(win, {
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defineAs: defineAs
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});
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let props = Object.getOwnPropertyNames(obj);
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for (let i = 0; i < props.length; i++) {
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let propName = props[i];
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let propValue = obj[propName];
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if (typeof propValue == "function") {
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Cu.exportFunction(propValue, clone, {
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defineAs: propName
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});
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} else {
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clone[propName] = Cu.cloneInto(propValue, win);
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}
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}
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};
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