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function simple_xpath(expr) {
var root = document.documentElement;
var iter = document.evaluate(expr, root,
document.createNSResolver(root),
XPathResult.UNORDERED_NODE_ITERATOR_TYPE, null);
var nodes = [];
var nwalk = iter.iterateNext();
while (nwalk) {
nodes.push(nwalk);
nwalk = iter.iterateNext();
}
return nodes;
}
function prepare_cliprects() {
var nodes = simple_xpath('//svg:rect[contains(@inkscape:label, "=")]');
console.log('setup');
for (i in nodes) {
var node = nodes[i];
node.orig_x = node.x.baseVal.value;
node.orig_y = node.y.baseVal.value;
node.orig_w = node.width.baseVal.value;
node.orig_h = node.height.baseVal.value;
}
}
function update_cliprect(node, dir, val) {
//var cliprect = document.getElementById("cliprect-dali.lounge_buero-0");
//var t = new Date().getTime() / 2000 * Math.PI;
// console.log("clipper: ", cliprect, " height: ", cliprect.height.baseVal.value, " sin: ", Math.sin(t));
// var state = 0.5 * (1 + Math.sin(t));
//console.log('node', node, 'dir', dir, 'val', val);
if (dir === "y") {
//console.log('orig_y', node.orig_y, 'orig_h', node.orig_h);
node.y.baseVal.value = node.orig_y + node.orig_h * (1 - val);
node.height.baseVal.value = node.orig_h * val;
} else if (dir === 'x') {
//console.log('orig_x', node.orig_x, 'orig_w', node.orig_w, 'w', node.orig_w * val);
node.width.baseVal.value = node.orig_w * val;
}
}
function update_elements(json) {
var nodes = simple_xpath('//*[contains(@inkscape:label, "=")]');
for (i in nodes) {
var node = nodes[i];
var spec = node.attributes['inkscape:label'].value.split('=', 2);
var dataelem = json[spec[0]];
if (dataelem === null)
continue;
if (node.localName == "g") {
node.style.display = (dataelem.text == spec[1])
? "inline" : "none";
} else if (node.localName == "text") {
var field = spec[1];
var value;
if (field[0] == '%') {
field = field.slice(1);
value = Math.round(dataelem[field] / 255. * 100) + "%";
} else {
value = dataelem[field];
}
node.firstChild.textContent = value;
} else if (node.localName == "rect") {
update_cliprect(node, spec[1], dataelem['actual'] / 255.);
} else {
console.log("unknown dynamic content type", node.localName);
}
}
}
var xhr = new XMLHttpRequest();
function xhr_handler() {
if (xhr.readyState === 4) {
if (xhr.status === 200) {
data = JSON.parse(xhr.responseText);
/* for (attr in data) {
console.log('xhr attr', attr);
} */
update_elements(data);
} else {
console.log('xhr: something went wrong', xhr.status, xhr.statusText);
}
}
}
xhr.onreadystatechange = xhr_handler;
function timer() {
xhr.open('GET', '/');
// xmlhttp.setRequestHeader('X-Requested-With', 'XMLHttpRequest');
xhr.send(null);
window.setTimeout(timer, 2000);
}
function doload() {
prepare_cliprects();
timer();
}
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