behavior-populate.js
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	/**
	* @provides javelin-behavior-differential-populate
	* @requires javelin-behavior
	* javelin-dom
	* javelin-stratcom
	* phabricator-tooltip
	* phabricator-diff-changeset-list
	* phabricator-diff-changeset
	* phuix-formation-view
	* @javelin
	*/

	JX.behavior('differential-populate', function(config, statics) {

	// When we perform a Quicksand navigation, deactivate the changeset lists on
	// the current page and activate the changeset lists on the new page.
	var onredraw = function(page_id) {
	// If the current page is already active, we don't need to do anything.
	if (statics.pageID === page_id) {
	return;
	}

	var ii;

	// Put the old lists to sleep.
	var old_lists = get_lists(statics.pageID);
	for (ii = 0; ii < old_lists.length; ii++) {
	old_lists[ii].sleep();
	}
	statics.pageID = null;

	// Awaken the new lists, if they exist.
	if (statics.pages.hasOwnProperty(page_id)) {
	var new_lists = get_lists(page_id);
	for (ii = 0; ii < new_lists.length; ii++) {
	new_lists[ii].wake();
	}

	statics.pageID = page_id;
	}
	};

	// Get changeset lists on the current page.
	var get_lists = function(page_id) {
	if (page_id === null) {
	return [];
	}

	return statics.pages[page_id] \|\| [];
	};

	if (!statics.installed) {
	statics.installed = true;
	statics.pages = {};
	statics.pageID = null;

	JX.Stratcom.listen('quicksand-redraw', null, function(e) {
	onredraw(e.getData().newResponseID);
	});
	}

	var changeset_list = new JX.DiffChangesetList()
	.setTranslations(JX.phtize(config.pht))
	.setInlineURI(config.inlineURI)
	.setInlineListURI(config.inlineListURI)
	.setIsStandalone(config.isStandalone);

	if (config.formationViewID) {
	var formation_node = JX.$(config.formationViewID);
	var formation_view = new JX.PHUIXFormationView(formation_node);
	changeset_list.setFormationView(formation_view);
	formation_view.start();
	}

	for (var ii = 0; ii < config.changesetViewIDs.length; ii++) {
	var id = config.changesetViewIDs[ii];
	var node = JX.$(id);
	var changeset = changeset_list.newChangesetForNode(node);
	if (changeset.shouldAutoload()) {
	changeset.setStabilize(true).load();
	}
	}

	// Install and activate the current page.
	var page_id = JX.Quicksand.getCurrentPageID();
	statics.pages[page_id] = [changeset_list];
	onredraw(page_id);

	var highlighted = null;
	var highlight_class = null;

	JX.Stratcom.listen(
	['mouseover', 'mouseout'],
	['differential-changeset', 'tag:td'],
	function(e) {
	var t = e.getTarget();

	// NOTE: Using className is not best practice, but the diff UI is perf
	// sensitive.
	if (!t.className.match(/cov\|copy/)) {
	return;
	}

	if (e.getType() == 'mouseout') {
	JX.Tooltip.hide();
	if (highlighted) {
	JX.DOM.alterClass(highlighted, highlight_class, false);
	highlighted = null;
	}
	} else {
	highlight_class = null;
	var msg;
	var align = 'W';
	var sibling = 'previousSibling';
	var width = 120;
	if (t.className.match(/cov-C/)) {
	msg = 'Covered';
	highlight_class = 'source-cov-C';
	} else if (t.className.match(/cov-U/)) {
	msg = 'Not Covered';
	highlight_class = 'source-cov-U';
	} else if (t.className.match(/cov-N/)) {
	msg = 'Not Executable';
	highlight_class = 'source-cov-N';
	} else {
	var match = /new-copy\|new-move/.exec(t.className);
	if (match) {
	sibling = 'nextSibling';
	width = 500;
	msg = JX.Stratcom.getData(t).msg;
	highlight_class = match[0];
	}
	}

	if (msg) {
	JX.Tooltip.show(t, width, align, msg);
	}

	if (highlight_class) {
	highlighted = t[sibling];
	JX.DOM.alterClass(highlighted, highlight_class, true);
	}
	}

	});


	});

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