gecko-dev/devtools/client/webide/modules/utils.js

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

const { Cc, Cu, Ci } = require("chrome");
const { FileUtils } = Cu.import("resource://gre/modules/FileUtils.jsm", {});
const Services = require("Services");
const Strings = Services.strings.createBundle("chrome://devtools/locale/webide.properties");

function doesFileExist(location) {
  let file = new FileUtils.File(location);
  return file.exists();
}
exports.doesFileExist = doesFileExist;

function _getFile(location, ...pickerParams) {
  if (location) {
    return Promise.resolve(new FileUtils.File(location));
  }
  let fp = Cc["@mozilla.org/filepicker;1"].createInstance(Ci.nsIFilePicker);
  fp.init(...pickerParams);

  return new Promise(resolve => {
    fp.open(res => {
      if (res == Ci.nsIFilePicker.returnCancel) {
        resolve(null);
      } else {
        resolve(fp.file);
      }
    });
  });
}

function getCustomBinary(window, location) {
  return _getFile(location, window, Strings.GetStringFromName("selectCustomBinary_title"), Ci.nsIFilePicker.modeOpen);
}
exports.getCustomBinary = getCustomBinary;

function getCustomProfile(window, location) {
  return _getFile(location, window, Strings.GetStringFromName("selectCustomProfile_title"), Ci.nsIFilePicker.modeGetFolder);
}
exports.getCustomProfile = getCustomProfile;

function getPackagedDirectory(window, location) {
  return _getFile(location, window, Strings.GetStringFromName("importPackagedApp_title"), Ci.nsIFilePicker.modeGetFolder);
}
exports.getPackagedDirectory = getPackagedDirectory;

function getHostedURL(window, location) {
  let ret = { value: null };

  if (!location) {
    Services.prompt.prompt(window,
        Strings.GetStringFromName("importHostedApp_title"),
        Strings.GetStringFromName("importHostedApp_header"),
        ret, null, {});
    location = ret.value;
  }

  if (!location) {
    return null;
  }

  // Clean location string and add "http://" if missing
  location = location.trim();
  try { // Will fail if no scheme
    Services.io.extractScheme(location);
  } catch (e) {
    location = "http://" + location;
  }
  return location;
}
exports.getHostedURL = getHostedURL;