// BlzWidget.js
// 
// Widget Abstract Layer(wal)
// wal is freely distributable under the terms of new BSD license.
// Copyright (c) 2006-2007, makoto_kw (makoto.kw@gmail.com) All rights reserved.

Blz.Widget = {
  version: "0.1"
};

// Widget.Engines
Blz.Widget.Engines = {
  Unknown:    "unknown",
  Yahoo:      "yahoo",
  iGoogle:    "igoogle",
  GoogleDesktop:  "googledesktop",
  VistaSidebar: "sidebar",
  IE: "ie"
};

// Widget.Platforms
Blz.Widget.Platforms = {
  Unknown:  "Unknown",
  Windows:  "Windows",
  MacOSX:   "Macintosh"
};

// Blz.Widget(Abstruct)
Object.extend(Blz.Widget, {
  // Global functions
  engine: Blz.Widget.Engines.Unknown,
  getPlatform: function() { return 'unknown'; },
  getLocale: function() { return "en"; },
  toPlatformPath: function(str) {
    if (!str ) return;
    if (this.getPlatform()==Blz.Widget.Platforms.Windows) {
      str = str.replace("/","\\");
    }
    return str;
  },
  assert: function(expression){},
  debug: function(str) {},
  print: function(str) {},
  removeInjectionsForWeb: function(str) {
    if (!str ) return;
    str = String(str);
    str = str.replace(/[<>\"\'\\\n\r]/g, function(c){c=escape(c); return c;});
    return str;
  },
  
  // Windows COM Supported
  isComSupported: false,
  connectComObject: function(object, prefix) {},
  createComObject: function(guid) {return null;},
  disconnectComObject:  function(object) {},
  
  // AppleScript Supported
  isAppleScriptSupported: false,
  appleScript: function(commands){},
  
  // HttpRequest
  openURL: function(url) {},
  fetchContent: function(url, callback) {
    var req = new Blz.Widget.URL();
    req.fetchContent(url, callback);
  },
  fetchContentCallback: null,
  createHttpRequest: function() {
    var http = null;
    try {
      if (window.ActiveXObject) {
        try { http = new ActiveXObject("Msxml2.XMLHTTP"); } 
        catch (e) {}
        http = new ActiveXObject("Microsoft.XMLHTTP");
      } else if (window.XMLHttpRequest) {
        http = new XMLHttpRequest();
      }
    } catch (e) {
      http = null;
    }
    return http;
  },
  
  // Widget
  name: "",
  version: "",
  author: "",
  company: "",
  close: function() {},
  focus: function() {},
  reload: function() {},
  showPreference: function() {},
  setPreference: function(key, value) {},
  getPreference: function(key) {return '';},
  getResourceString: function(key) { return ''},
  getMenuSeparatorTitle: function() { return ''}
});

// Blz.Widget.URL
Blz.Widget.URL = Class.create();
Blz.Widget.URL.prototype = {
  initialize: function() {},
  fetchContent: function(url, callback) {
    this.url = url;
    this.fetchContentCallback = callback;
    
    var ajax = new Ajax.Request(url, { 
      method:'get',
      onComplete:this.onAjaxFetchContentComplete.bind(this),
      onFailure:this.onAjaxFetchContentFailure.bind(this)
      }
    );
  },
  onAjaxFetchContentComplete: function(transport) {
    this.fetchContentCallback(transport.responseText);
  },  
  onAjaxFetchContentFailure: function(transport) {
    this.fetchContentCallback(false);
  },
  fetchXML: function(url, callback) {
    this.url = url;
    this.fetchXMLCallback = callback;
    var ajax = new Ajax.Request(url, { 
      method:'get',
      onComplete:this.onAjaxFetchXMLComplete.bind(this),
      onFailure:this.onAjaxFetchXMLFailure.bind(this)
      }
    );
  },
  onAjaxFetchXMLComplete: function(transport) {
    this.fetchXMLCallback(transport.responseXML);
  },  
  onAjaxFetchXMLFailure: function(transport) {
    this.fetchXMLCallback(false);
  }
};