layout/html/tests/TestInsert.js

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  37
  38 var count = 0;
  39
  40 function trace(msg)
  41 {
  42   dump("test " + msg + " (" + count + ")\n");
  43 }
  44
  45 function findBody(node)
  46 {
  47   var children = node.childNodes;
  48   var length = children.length;
  49   var child = null;
  50   var count = 0;
  51   while (count < length) {
  52     child = children.item(count);
  53     if (child.tagName == "BODY") {
  54       return child;
  55     }
  56     var body = findBody(child);
  57     if (null != body) {
  58       return body;
  59     }
  60     count++;
  61   }
  62   return null;
  63 }
  64
  65 function TestInsert(parent, child)
  66 {
  67   var childTag = "(text)";
  68   if (child.nodeType != Node.TEXT_NODE) {
  69     childTag = child.tagName;
  70   }
  71
  72   // Insert a piece of text before the span; this tests insertion at the
  73   // beginning
  74   trace("insert before [" + parent.tagName + "," + childTag + "]");
  75   count++;
  76   var beforeText = document.createTextNode("before ");
  77   parent.insertBefore(beforeText, child);
  78
  79   // Insert a piece of text before the span; after the above, this tests
  80   // insertion in the middle.
  81   trace("insert middle [" + parent.tagName + "," + childTag + "]");
  82   count++;
  83   parent.insertBefore(document.createTextNode("middle "), child);
  84 }
  85
  86 var body = findBody(document.documentElement);
  87
  88 // Create a block child with a span in it
  89 var block = document.createElement("P");
  90 var span = document.createElement("SPAN");
  91 var spanText = document.createTextNode("Some text");
  92 span.insertBefore(spanText, null);
  93 block.insertBefore(span, null);
  94
  95 // Append the block to the body
  96 body.insertBefore(block, null);
  97
  98 // Insert stuff into the block
  99 TestInsert(block, span);
 100
 101 // Insert stuff into the span
 102 TestInsert(span, spanText);