web_frontend/main.js

   1 //
   2 // Armadillo File Manager
   3 // Copyright (c) 2010, Robert Sesek <http://www.bluestatic.org>
   4 //
   5 // This program is free software: you can redistribute it and/or modify it under
   6 // the terms of the GNU General Public License as published by the Free Software
   7 // Foundation, either version 3 of the License, or any later version.
   8 //
   9
  10 goog.provide('armadillo');
  11
  12 goog.require('goog.array');
  13 goog.require('goog.dom');
  14 goog.require('goog.net.XhrIo');
  15 goog.require('goog.Uri.QueryData');
  16
  17 armadillo = function() {
  18   var start_path = '/';
  19   if (window.location.hash) {
  20     start_path = window.location.hash.substr(1);
  21   }
  22   this.list(start_path);
  23   this.listeners_ = new Array();
  24   goog.events.listen(window, goog.events.EventType.HASHCHANGE,
  25       this.hashChanged_, false, this);
  26 }
  27
  28 /**
  29  * Starts a new XHR service request from the backend.
  30  * @param  {string}  action  Action to perform.
  31  * @param  {Object}  extra_data  Extra data to add.
  32  * @param  {Function}  callback  XHR callback.
  33  */
  34 armadillo.prototype.sendRequest_ = function(action, extra_data, callback) {
  35   var data = new goog.Uri.QueryData();
  36   data.set('action', action);
  37   data.extend(extra_data);
  38   goog.net.XhrIo.send('/service', callback, 'POST', data);
  39 };
  40
  41 /**
  42  * Updates the directory listing for a given path.
  43  * @param  {string}  path  Path to list; relative to jail.
  44  */
  45 armadillo.prototype.list = function(path) {
  46   var callback = function(e) {
  47     var data = e.target.getResponseJson();
  48     if (data['error']) {
  49       return;  // Error.
  50     }
  51     // Unlisten all current listeners.
  52     goog.array.forEach(app.listeners_, function(e) {
  53       goog.events.unlistenByKey(e);
  54     });
  55
  56     // Update the listing.
  57     goog.dom.setTextContent(goog.dom.getElement('pwd'), path);
  58     app.currentPath_ = path;
  59     window.location.hash = path;
  60     var list = goog.dom.getElement('ls');
  61     goog.dom.removeChildren(list);
  62
  63     // Add a previous directory entry.
  64     if (path != '/' && path != '')
  65       goog.array.insertAt(data, '../', 0);
  66
  67     // Add items for each entry.
  68     goog.array.forEach(data, function(file) {
  69       var elm = goog.dom.createElement('li');
  70       goog.dom.setTextContent(elm, file);
  71       goog.dom.appendChild(list, elm);
  72       app.listeners_.push(goog.events.listen(elm,
  73           goog.events.EventType.CLICK, app.clickHandler_, false, app));
  74     });
  75   }
  76   this.sendRequest_('list', {'path':path}, callback);
  77 };
  78
  79 /**
  80  * Click handler for elements.
  81  * @param  {Event}  e
  82  */
  83 armadillo.prototype.clickHandler_ = function(e) {
  84   var target = goog.dom.getTextContent(e.target);
  85   if (target == '../') {
  86     this.list(this.stripLastPathComponent_(this.currentPath_));
  87   } else if (this.isDirectory_(target)) {
  88     this.list(this.currentPath_ + target);
  89   }
  90 };
  91
  92 /**
  93  * Event for when the hash changes.
  94  * @param  {Event}  e
  95  */
  96 armadillo.prototype.hashChanged_ = function(e) {
  97   if (window.location.hash.length)
  98     this.list(window.location.hash.substr(1));
  99 };
 100
 101 /**
 102  * Checks whether a path is a directory.
 103  * @param  {string}  path
 104  * @returns boolean
 105  */
 106 armadillo.prototype.isDirectory_ = function(path) {
 107   return path[path.length - 1] == '/';
 108 };
 109
 110 /**
 111  * Strips the last path component from a path.
 112  * @param  {string}  path
 113  * @returns string
 114  */
 115 armadillo.prototype.stripLastPathComponent_ = function(path) {
 116   for (var i = path.length - 1; i >= 0; --i) {
 117     if (path[i] == '/') {
 118       if (i != path.length - 1) {
 119         return path.substring(0, i + 1);
 120       }
 121     }
 122   }
 123   return '/';
 124 };