add a simple JS-based hook host

index.php

@@ -100,7 +100,7 @@
 		require 'lib/jshrink/Minifier.php';
 
 		print get_minified_js(array("tt-rss",
-			"functions", "feedlist", "viewfeed", "FeedTree"));
+			"functions", "feedlist", "viewfeed", "FeedTree", "PluginHost"));
 
 		foreach (PluginHost::getInstance()->get_plugins() as $n => $p) {
 			if (method_exists($p, "get_js")) {

js/feedlist.js

@@ -139,6 +139,7 @@ function viewfeed(feed, method, is_cat, offset, background, infscroll_req) {
 			onComplete: function(transport) {
 				setFeedExpandoIcon(feed, is_cat, 'images/blank_icon.gif');
 				headlines_callback2(transport, offset, background, infscroll_req);
+				PluginHost.run(PluginHost.HOOK_FEED_LOADED, [feed, is_cat]);
 			} });
 
 	} catch (e) {

js/tt-rss.js

@@ -40,6 +40,8 @@ function setActiveFeedId(id, is_cat) {
 		$("headlines-frame").setAttribute("is-cat", is_cat ? 1 : 0);
 
 		selectFeed(id, is_cat);
+
+		PluginHost.run(PluginHost.HOOK_FEED_SET_ACTIVE, _active_article_id);
 	} catch (e) {
 		exception_error("setActiveFeedId", e);
 	}

js/viewfeed.js

@@ -232,6 +232,8 @@ function render_article(article) {
 			c.domNode.scrollTop = 0;
 		} catch (e) { };
 
+		PluginHost.run(PluginHost.HOOK_ARTICLE_RENDERED, article);
+
 		c.attr('content', article);
 
 		correctHeadlinesOffset(getActiveArticleId());
@@ -1193,6 +1195,7 @@ function cdmScrollToArticleId(id, force) {
 
 function setActiveArticleId(id) {
 	_active_article_id = id;
+	PluginHost.run(PluginHost.HOOK_ARTICLE_SET_ACTIVE, _active_article_id);
 }
 
 function getActiveArticleId() {
@@ -1219,6 +1222,8 @@ function unpackVisibleHeadlines() {
 					var cencw = $("CENCW-" + child.id.replace("RROW-", ""));
 
 					if (cencw) {
+						PluginHost.run(PluginHost.HOOK_ARTICLE_RENDERED_CDM, child);
+
 						cencw.innerHTML = htmlspecialchars_decode(cencw.innerHTML);
 						cencw.setAttribute('id', '');
 						Element.show(cencw);