better-testing

behavior-diffusion-browse-file.js
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			/**
			* @provides javelin-behavior-diffusion-browse-file
			* @requires javelin-behavior
			* javelin-dom
			* javelin-util
			* phabricator-tooltip
			*/

			JX.behavior('diffusion-browse-file', function(config, statics) {
			if (statics.installed) {
			return;
			}
			statics.installed = true;

			var map = config.labels;

			JX.Stratcom.listen(
			['mouseover', 'mouseout'],
			['phabricator-source', 'tag:td'],
			function(e) {
			var target = e.getTarget();

			// NOTE: We're using raw classnames instead of sigils and metadata here
			// because these elements are unusual: there are a lot of them on the
			// page, and rendering all the extra metadata to do this in a normal way
			// would be needlessly expensive. This is an unusual case.

			if (!target.className.match(/cov-/)) {
			return;
			}

			if (e.getType() == 'mouseout') {
			JX.Tooltip.hide();
			return;
			}

			for (var k in map) {
			if (!target.className.match(k)) {
			continue;
			}

			var label = map[k];
			JX.Tooltip.show(target, 300, 'E', label);
			break;
			}
			});
			});