html2canvas/tests/assets/jquery.plugin.html2canvas.js

/*
 * jQuery helper plugin for examples and tests
 */
(function( $ ){
  $.fn.html2canvas = function(options) {
    if (options && options.profile && window.console && window.console.profile && window.location.search !== "?selenium2") {
      console.profile();
    }
    var date = new Date(),
    html2obj,
    $message = null,
    timeoutTimer = false,
    timer = date.getTime();
    options = options || {};

    options.onrendered = options.onrendered || function( canvas ) {
      var $canvas = $(canvas),
      finishTime = new Date();

      if (options && options.profile && window.console && window.console.profileEnd) {
        console.profileEnd();
      }
      $canvas.addClass("html2canvas")
      .css({
        position: 'absolute',
        left: 0,
        top: 0
      }).appendTo(document.body);

      if (window.location.search !== "?selenium") {
        $canvas.siblings().toggle();
        $(window).click(function(){
          $canvas.toggle().siblings().toggle();
          throwMessage("Canvas Render " + ($canvas.is(':visible') ? "visible" : "hidden"));
        });
        throwMessage('Screenshot created in '+ ((finishTime.getTime()-timer)) + " ms<br />",4000);
      } else {
        $canvas.css('display', 'none');
      }
      // test if canvas is read-able
      try {
        $canvas[0].toDataURL();
      } catch(e) {
        if ($canvas[0].nodeName.toLowerCase() === "canvas") {
          // TODO, maybe add a bit less offensive way to present this, but still something that can easily be noticed
          alert("Canvas is tainted, unable to read data");
        }
      }
    };

    html2obj = html2canvas(this, options);

    function throwMessage(msg,duration){
      window.clearTimeout(timeoutTimer);
      timeoutTimer = window.setTimeout(function(){
        $message.fadeOut(function(){
          $message.remove();
          $message = null;
        });
      },duration || 2000);
      if ($message)
        $message.remove();
      $message = $('<div />').html(msg).css({
        margin:0,
        padding:10,
        background: "#000",
        opacity:0.7,
        position:"fixed",
        top:10,
        right:10,
        fontFamily: 'Tahoma',
        color:'#fff',
        fontSize:12,
        borderRadius:12,
        width:'auto',
        height:'auto',
        textAlign:'center',
        textDecoration:'none',
        display:'none'
      }).appendTo(document.body).fadeIn();
      html2obj.log(msg);
    }
  };
})( jQuery );