lib/editor/tinymce/moodledialog.js

   1 /**
   2 * $Id$
   3 *
   4 * Though "Dialog" looks like an object, it isn't really an object.  Instead
   5 * it's just namespace for protecting global symbols.
   6 **/
   7
   8 function Dialog(url, width, height, action, init) {
   9     if (typeof init == "undefined") {
  10         init = window;  // pass this window object by default
  11     }
  12     Dialog._geckoOpenModal(url, width, height, action, init);
  13 };
  14
  15 Dialog._addEvent = function (el, evname, func) {
  16     if ( document.all ) {
  17         el.attachEvent("on" + evname, func);
  18     } else {
  19         el.addEventListener(evname, func, true);
  20     }
  21 };
  22
  23 Dialog._removeEvent = function (el, evname, func) {
  24     if ( document.all ) {
  25         el.detachEvent("on" + evname, func);
  26     } else {
  27         el.removeEventListener(evname, func, true);
  28     }
  29 };
  30
  31 Dialog._stopEvent = function (ev) {
  32     if ( document.all ) {
  33         ev.cancelBubble = true;
  34         ev.returnValue = false;
  35     } else {
  36         ev.preventDefault();
  37         ev.stopPropagation();
  38     }
  39 };
  40
  41 Dialog._parentEvent = function(ev) {
  42     if (Dialog._modal && !Dialog._modal.closed) {
  43         Dialog._modal.focus();
  44         Dialog._stopEvent(ev);
  45     }
  46 };
  47
  48 // should be a function, the return handler of the currently opened dialog.
  49 Dialog._return = null;
  50
  51 // constant, the currently opened dialog
  52 Dialog._modal = null;
  53
  54 // the dialog will read it's args from this variable
  55 Dialog._arguments = null;
  56
  57 Dialog._geckoOpenModal = function(url, width, height, action, init) {
  58
  59     var file = url.substring(url.lastIndexOf('/') + 1, url.lastIndexOf('.'));
  60     var x,y;
  61     x = width;
  62     y = height;
  63
  64     var lx = (screen.width - x) / 2;
  65     var tx = (screen.height - y) / 2;
  66     var dlg = window.open(url, "ha_dialog", "toolbar=no,menubar=no,personalbar=no, width="+ x +",height="+ y +",scrollbars=no,resizable=no, left="+ lx +", top="+ tx +"");
  67     Dialog._modal = dlg;
  68     Dialog._arguments = init;
  69
  70     // capture some window's events
  71     function capwin(w) {
  72         Dialog._addEvent(w, "click", Dialog._parentEvent);
  73         Dialog._addEvent(w, "mousedown", Dialog._parentEvent);
  74         Dialog._addEvent(w, "focus", Dialog._parentEvent);
  75     };
  76     // release the captured events
  77     function relwin(w) {
  78         Dialog._removeEvent(w, "click", Dialog._parentEvent);
  79         Dialog._removeEvent(w, "mousedown", Dialog._parentEvent);
  80         Dialog._removeEvent(w, "focus", Dialog._parentEvent);
  81     };
  82     capwin(window);
  83     // capture other frames, note the exception trapping, this is because
  84     // we are not permitted to add events to frames outside of the current
  85     // window's domain.
  86     for (var i = 0; i < window.frames.length; i++) {try { capwin(window.frames[i]); } catch(e) { } };
  87     // make up a function to be called when the Dialog ends.
  88     Dialog._return = function (val) {
  89         if (val && action) {
  90             action(val);
  91         }
  92         relwin(window);
  93         // capture other frames
  94         for (var i = 0; i < window.frames.length; i++) { try { relwin(window.frames[i]); } catch(e) { } };
  95         Dialog._modal = null;
  96     };
  97     Dialog._modal.focus();
  98 };