gecko-dev/layout/html/tests/TestInsert.js

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JavaScript

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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var count = 0;
function trace(msg)
{
dump("test " + msg + " (" + count + ")\n");
}
function findBody(node)
{
var children = node.childNodes;
var length = children.length;
var child = null;
var count = 0;
while (count < length) {
child = children.item(count);
if (child.tagName == "BODY") {
return child;
}
var body = findBody(child);
if (null != body) {
return body;
}
count++;
}
return null;
}
function TestInsert(parent, child)
{
var childTag = "(text)";
if (child.nodeType != Node.TEXT_NODE) {
childTag = child.tagName;
}
// Insert a piece of text before the span; this tests insertion at the
// beginning
trace("insert before [" + parent.tagName + "," + childTag + "]");
count++;
var beforeText = document.createTextNode("before ");
parent.insertBefore(beforeText, child);
// Insert a piece of text before the span; after the above, this tests
// insertion in the middle.
trace("insert middle [" + parent.tagName + "," + childTag + "]");
count++;
parent.insertBefore(document.createTextNode("middle "), child);
}
var body = findBody(document.documentElement);
// Create a block child with a span in it
var block = document.createElement("P");
var span = document.createElement("SPAN");
var spanText = document.createTextNode("Some text");
span.insertBefore(spanText, null);
block.insertBefore(span, null);
// Append the block to the body
body.insertBefore(block, null);
// Insert stuff into the block
TestInsert(block, span);
// Insert stuff into the span
TestInsert(span, spanText);