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View Source Code for “JetCC”

// The code below is licensed… well, donated to the Public Domain.
// Author: BobChao http://blog.bobchao.net <- share your ideas!

function JetCC(_statusBarDoc){
  var _self = this;

// Private Members
  var _iscc = false;
  var _prevTab = null;

// Public Members
  _self.licenseUrl="";
  
  // Public Methods
  _self.showLicense = function(){
    if (_iscc) {
      // 考慮 ccREL 對 Commons Deed 網頁的影響，模擬為使用者點選按鈕後前往該頁。
      var condoc = jetpack.tabs.focused.contentDocument;
      $(condoc).find("body").append("<button onclick=\"window.location.href='"+ _self.licenseUrl +"'\" id=\"jetccinsertlink\" style=\"display:hidden\">jetcc</button>");
      $(condoc).find("#jetccinsertlink").click();
    } else _showMsg("All rights reserved (No ccREL metadata in this page.)")
  }

// Private Methods
  var _resetStatusIcon = function(){
    _changeImage("");
    $(_statusBarDoc).find("div").html("no ccREL");
  }

var _changeImage = function (imageUrl) {
    var relObj = $(_statusBarDoc).find("div");
    relObj.css("background-image", "url("+imageUrl+")");
    relObj.html("");
  }

var _showMsg = function(msg){
    jetpack.notifications.show({
      title: "License of this page:",
      body: msg,
      icon: jetpack.tabs.focused.favicon
    });
  }

var _getLicense = function (){
    var tabObj = jetpack.tabs.focused;
    var licenseInfo = $(tabObj.contentDocument).find('a[rel~="license"]');

_resetStatusIcon();

if (licenseInfo.length>0) _self.licenseUrl = licenseInfo[0].href;
    else _self.licenseUrl = null;

//檢查是否為 CC 相關授權條款
    ccreg = /https?:\/\/(creativecommons\.org)\/licenses\/(.*)\/[0-9]\.[0-9]\/.*/i.exec(_self.licenseUrl);
    _iscc = (ccreg && ccreg[1]=='creativecommons.org')? true: false;

if (_iscc) _changeImage("http://i.creativecommons.org/l/"+ccreg[2]+"/3.0/80x15.png");
  }

//Events handlers reg.
  $(_statusBarDoc).find("div").click(_self.showLicense);
  jetpack.tabs.onFocus(function (){
    if (_prevTab==null) _prevTab = jetpack.tabs.focused;
    else _prevTab.onReady.unbind(_getLicense);

_getLicense();

//防止日後變動
    jetpack.tabs.focused.onReady(_getLicense);
  });
}

jetpack.statusBar.append({
  html: '<div style="position:absolute; top:0; left:0; bottom:0; right:0; background: black center center no-repeat; font-size: 12px; color: white; text-align: center;">no ccREL</div>',
  width: 80,
  onReady: function(doc) {
    var jetcc = new JetCC(doc);
  }
});