1 files changed, 127 insertions, 0 deletions
diff --git a/skins/common/ajaxwatch.js b/skins/common/ajaxwatch.js
new file mode 100644
index 00000000..16e4fdc4
--- /dev/null
+++ b/skins/common/ajaxwatch.js
@@ -0,0 +1,127 @@
+// dependencies:
+// * ajax.js:
+  /*extern sajax_init_object, sajax_do_call */
+// * wikibits.js:
+  /*extern changeText, akeytt, hookEvent */
+
+// These should have been initialized in the generated js
+/*extern wgAjaxWatch, wgArticleId */
+
+if(typeof wgAjaxWatch === "undefined" || !wgAjaxWatch) {
+	var wgAjaxWatch = {
+		watchMsg: "Watch",
+		unwatchMsg: "Unwatch",
+		watchingMsg: "Watching...",
+		unwatchingMsg: "Unwatching..."
+	};
+}
+
+wgAjaxWatch.supported = true; // supported on current page and by browser
+wgAjaxWatch.watching = false; // currently watching page
+wgAjaxWatch.inprogress = false; // ajax request in progress
+wgAjaxWatch.timeoutID = null; // see wgAjaxWatch.ajaxCall
+wgAjaxWatch.watchLink1 = null; // "watch"/"unwatch" link
+wgAjaxWatch.watchLink2 = null; // second one, for (some?) non-Monobook-based
+wgAjaxWatch.oldHref = null; // url for action=watch/action=unwatch
+
+wgAjaxWatch.setLinkText = function(newText) {
+	changeText(wgAjaxWatch.watchLink1, newText);
+	if (wgAjaxWatch.watchLink2) {
+		changeText(wgAjaxWatch.watchLink2, newText);
+	}
+};
+
+wgAjaxWatch.setLinkID = function(newId) {
+	wgAjaxWatch.watchLink1.id = newId;
+	akeytt(newId); // update tooltips for Monobook
+};
+
+wgAjaxWatch.ajaxCall = function() {
+	if(!wgAjaxWatch.supported || wgAjaxWatch.inprogress) {
+		return;
+	}
+	wgAjaxWatch.inprogress = true;
+	wgAjaxWatch.setLinkText(wgAjaxWatch.watching ? wgAjaxWatch.unwatchingMsg : wgAjaxWatch.watchingMsg);
+	sajax_do_call("wfAjaxWatch", [wgArticleId, (wgAjaxWatch.watching ? "u" : "w")], wgAjaxWatch.processResult);
+	// if the request isn't done in 10 seconds, allow user to try again
+	wgAjaxWatch.timeoutID = window.setTimeout(function() { wgAjaxWatch.inprogress = false; }, 10000);
+	return;
+};
+
+wgAjaxWatch.processResult = function(request) {
+	if(!wgAjaxWatch.supported) {
+		return;
+	}
+	var response = request.responseText;
+	if(response == "<err#>") {
+		window.location.href = wgAjaxWatch.oldHref;
+		return;
+	} else if(response == "<w#>") {
+		wgAjaxWatch.watching = true;
+		wgAjaxWatch.setLinkText(wgAjaxWatch.unwatchMsg);
+		wgAjaxWatch.setLinkID("ca-unwatch");
+		wgAjaxWatch.oldHref = wgAjaxWatch.oldHref.replace(/action=watch/, "action=unwatch");
+	} else if(response == "<u#>") {
+		wgAjaxWatch.watching = false;
+		wgAjaxWatch.setLinkText(wgAjaxWatch.watchMsg);
+		wgAjaxWatch.setLinkID("ca-watch");
+		wgAjaxWatch.oldHref = wgAjaxWatch.oldHref.replace(/action=unwatch/, "action=watch");
+	}
+	wgAjaxWatch.inprogress = false;
+	if(wgAjaxWatch.timeoutID) {
+		window.clearTimeout(wgAjaxWatch.timeoutID);
+	}
+	return;
+};
+
+wgAjaxWatch.onLoad = function() {
+	var el1 = document.getElementById("ca-unwatch");
+	var el2 = null;
+	if (!el1) {
+		el1 = document.getElementById("mw-unwatch-link1");
+		el2 = document.getElementById("mw-unwatch-link2");
+	}
+	if(el1) {
+		wgAjaxWatch.watching = true;
+	} else {
+		wgAjaxWatch.watching = false;
+		el1 = document.getElementById("ca-watch");
+		if (!el1) {
+			el1 = document.getElementById("mw-watch-link1");
+			el2 = document.getElementById("mw-watch-link2");
+		}
+		if(!el1) {
+			wgAjaxWatch.supported = false;
+			return;
+		}
+	}
+
+	if(!wfSupportsAjax()) {
+		wgAjaxWatch.supported = false;
+		return;
+	}
+
+	// The id can be either for the parent (Monobook-based) or the element
+	// itself (non-Monobook)
+	wgAjaxWatch.watchLink1 = el1.tagName.toLowerCase() == "a" ? el1 : el1.firstChild;
+	wgAjaxWatch.watchLink2 = el2 ? el2 : null;
+
+	wgAjaxWatch.oldHref = wgAjaxWatch.watchLink1.getAttribute("href");
+	wgAjaxWatch.watchLink1.setAttribute("href", "javascript:wgAjaxWatch.ajaxCall()");
+	if (wgAjaxWatch.watchLink2) {
+		wgAjaxWatch.watchLink2.setAttribute("href", "javascript:wgAjaxWatch.ajaxCall()");
+	}
+	return;
+};
+
+hookEvent("load", wgAjaxWatch.onLoad);
+
+/**
+ * @return boolean whether the browser supports XMLHttpRequest
+ */
+function wfSupportsAjax() {
+	var request = sajax_init_object();
+	var supportsAjax = request ? true : false;
+	delete request;
+	return supportsAjax;
+}
+\ No newline at end of file