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frame.js
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frame.js
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/*
* Copyright (C) 2016 Virgo Venture, Inc.
* @%@~LICENSE~@%@
*
* depends on: common.js, ajax.js
*/
function turnme (node1, node2, node3)
{
node1.className += ' rotated';
node2.className += ' rotated';
loadFrame (node3, 'http://localhost:8080/app/work/open?=9', true);
}
function turnem (node1, node2, node3)
{
node1.className = node1.className.replace (/(?:^|\s)rotated(?!\S)/g, '');
node2.className = node2.className.replace (/(?:^|\s)rotated(?!\S)/g, '');
}
var _frames = new Map (); // keyed by frame node
/*
* arguments:
* frame - node to load content into
* url - url to load
* replace - if true, replace's any existing contents in target node
* callback - optional callback function after successful frame load
*/
function loadFrame (frame, url, replace, callback)
{
frame.className = frame.className.replace (/(?:^|\s)ready(?!\S)/g, '');
var ajax = ajaxLoad (url, _frameReady (frame, replace, callback));
if (ajax)
{
_frames.set (frame, ajax);
}
}
/*
* returns reference to call-back function for ajax state changes
*/
function _frameReady (frame, replace, callback)
{
return function ()
{
//alert ('yo: ' + frame);
var ajax = _frames.get (frame);
if (! ajax)
{
return;
}
if (ajax.readyState != 4)
{
return;
}
if (replace)
{
while (frame.firstChild)
{
frame.removeChild (frame.firstChild);
}
}
frame.className += ' ready';
if (ajax.status == 0)
{
// aborted?
return;
}
else if (ajax.status != 200)
{
node.innerHTML = 'frame: unexpected status: '+ajax.status;
return;
}
var xml = ajax.responseXML;
if (xml)
{
var doc = xml.documentElement;
if ('HTML' === doc.nodeName.toUpperCase ())
{
var body = xml.getElementById ('body');
if (! body)
{
body = doc.getElementsByTagName ('body')[0];
}
if (body)
{
for (var node = body.firstChild; node; node = node.nextSibling)
{
frame.appendChild (document.importNode (node, true));
}
}
else
{
frame.innerHTML = 'frame: html response with no body';
return;
}
}
else
{
frame.appendChild (document.importNode (doc, true));
}
}
else
{
var data = document.createElement ('div');
if (ajax.responseText)
{
/* FIXME: very hacky */
if (ajax.responseText.lastIndexOf ('<html', 0) === 0 || ajax.responseText.lastIndexOf ('\n<html', 0) === 0)
{
/*
var resp = document.createElement ('div');
resp.innerHTML = ajax.responseText;
var body = resp.getElementsByTagName ('body');
if (body.length === 1)
{
for (var node = body[0].firstChild; node; node = node.nextSibling)
{
alert ('append child: '+node);
data.appendChild (node);
}
}
else
{
data.innerHTML = '(html response with inappropriate body count: '+body.length+')';
}
resp = null;
*/
var idx = ajax.responseText.indexOf ('<body', 6);
if (idx>=0) idx = ajax.responseText.indexOf ('>', idx+5);
if (idx >= 0)
{
var eidx = ajax.responseText.indexOf ('</body>', idx+1);
if (eidx >= 0)
{
data.innerHTML = ajax.responseText.substring (idx+1, eidx);
}
else
{
data.innerHTML = ajax.responseText.substring (idx+1);
}
}
else
{
data.innerHTML = '(html response without body)';
return;
}
}
else
{
data.innerHTML = htmlSafe (ajax.responseText);
}
}
else
{
data.innerHTML = '(empty response)';
return;
}
frame.appendChild (data);
}
if (callback)
{
callback();
}
};
}

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