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phorge/webroot/rsrc/js/application/harbormaster/behavior-harbormaster-log.js
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behavior-harbormaster-log.js
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/**
* @provides javelin-behavior-harbormaster-log
* @requires javelin-behavior
*/
JX.behavior('harbormaster-log', function(config) {
var contentNode = JX.$(config.contentNodeID);
var following = false;
var autoscroll = false;
JX.DOM.listen(contentNode, 'click', 'harbormaster-log-expand', function(e) {
if (!e.isNormalClick()) {
return;
}
e.kill();
expand(e.getNode('harbormaster-log-expand'), true);
});
function expand(node, is_action) {
var row = JX.DOM.findAbove(node, 'tr');
row = JX.DOM.findAbove(row, 'tr');
var data = JX.Stratcom.getData(node);
if (data.stop) {
following = false;
autoscroll = false;
JX.DOM.alterClass(contentNode, 'harbormaster-log-following', false);
return;
}
var uri = new JX.URI(config.renderURI)
.addQueryParams(data);
if (data.live && is_action) {
following = true;
autoscroll = true;
JX.DOM.alterClass(contentNode, 'harbormaster-log-following', true);
}
var request = new JX.Request(uri, function(r) {
var result = JX.$H(r.markup).getNode();
var rows = [].slice.apply(result.firstChild.childNodes);
// If we're following the bottom of the log, the result always includes
// the last line from the previous render. Throw it away, then add the
// new data.
if (data.live && row.previousSibling) {
JX.DOM.remove(row.previousSibling);
}
JX.DOM.replace(row, rows);
if (data.live) {
// If this was a live follow, scroll the new data into view. This is
// probably intensely annoying in practice but seems cool for now.
if (autoscroll) {
var last_row = rows[rows.length - 1];
var tail_pos = JX.$V(last_row).y + JX.Vector.getDim(last_row).y;
var view_y = JX.Vector.getViewport().y;
JX.DOM.scrollToPosition(null, (tail_pos - view_y) + 32);
// This will fire a scroll event, but we want to keep autoscroll
// enabled until we see an explicit scroll event by the user.
setTimeout(function() { autoscroll = true; }, 0);
}
setTimeout(follow, 2000);
for (var ii = 1; ii < (rows.length - 1); ii++) {
JX.DOM.alterClass(rows[ii], 'harbormaster-log-appear', true);
}
}
});
request.send();
}
// If the user explicitly scrolls while following a log, keep live updating
// it but stop following it with the scrollbar.
JX.Stratcom.listen('scroll', null, function() {
autoscroll = false;
});
function follow() {
if (!following) {
return;
}
var live;
try {
live = JX.DOM.find(contentNode, 'a', 'harbormaster-log-live');
} catch (e) {
return;
}
expand(live);
}
function onresponse(r) {
JX.DOM.alterClass(contentNode, 'harbormaster-log-view-loading', false);
JX.DOM.setContent(contentNode, JX.$H(r.markup));
}
var uri = new JX.URI(config.initialURI);
new JX.Request(uri, onresponse)
.send();
});

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