Differential D10887 Diff 26226 webroot/rsrc/js/application/transactions/behavior-show-older-transactions.js

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webroot/rsrc/js/application/transactions/behavior-show-older-transactions.js

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				/**
				* @provides javelin-behavior-phabricator-show-older-transactions
				* @requires javelin-behavior
				* javelin-stratcom
				* javelin-dom
				* phabricator-busy
				*/

				JX.behavior('phabricator-show-older-transactions', function(config) {

				var loading = false;

				function get_hash() {
				return window.location.hash.replace(/^#/, '');
				}

				function hash_is_hidden() {
				var hash = get_hash();
				if (!hash) {
				return false;
				}
				var id = 'anchor-'+hash;
				try {
				JX.$(id);
				} catch (not_found_exception) {
				return true;
				}
				return false;
				}

				function check_hash() {
				if (hash_is_hidden()) {
				var showOlderBlock = null;
				try {
				showOlderBlock = JX.DOM.find(
				JX.$(config.timelineID),
				'div',
				'show-older-block');
				} catch (not_found_exception) {
				// probably a garbage hash and we loaded everything looking
				// for it; just abort
				if (loading) {
				loading = false;
				JX.Busy.done();
				}
				return;
				}
				var showOlderLink = JX.DOM.find(
				showOlderBlock,
				'a',
				'show-older-link');
				if (!loading) {
				loading = true;
				JX.Busy.start();
				}
				fetch_older_workflow(
				showOlderLink.href,
				load_hidden_hash,
				showOlderBlock)
				.start();
				} else {
				if (loading) {
				loading = false;
				JX.Busy.done();
				}
				try {
				var target = JX.$(get_hash());
				JX.DOM.scrollTo(target);
				} catch (ignored) {
				// We did our best.
				}
				}
				}

				var show_older = function(swap, r) {
				JX.DOM.replace(swap, JX.$H(r.timeline).getFragment());
				};

				var load_hidden_hash = function(swap, r) {
				show_older(swap, r);
				check_hash();
				};

				var fetch_older_workflow = function(href, callback, swap) {
				return new JX.Workflow(href)
				.setHandler(JX.bind(null, callback, swap));
				};

				JX.Stratcom.listen(
				'click',
				['show-older-link'],
				function(e) {
				e.kill();
				fetch_older_workflow(
				e.getNode('tag:a').href,
				show_older,
				e.getNode('show-older-block'))
				.start();
				});

				JX.Stratcom.listen('hashchange', null, check_hash);
				check_hash();

				});