Created
August 31, 2010 05:32
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Polymaps / JSONP Queue
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| diff --git a/src/Queue.js b/src/Queue.js | |
| index d243c13..616dbc6 100644 | |
| --- a/src/Queue.js | |
| +++ b/src/Queue.js | |
| @@ -99,5 +99,41 @@ po.queue = (function() { | |
| return {abort: abort}; | |
| } | |
| - return {text: text, xml: xml, json: json, image: image}; | |
| + function jsonp(src, callback) { | |
| + var script, head, callbackId = "p01YmAp5" + po.id(); | |
| + | |
| + function send() { | |
| + window[callbackId] = callback; | |
| + script = document.createElement("script"); | |
| + script.setAttribute("type", "text/javascript"); | |
| + script.setAttribute("src", src.replace(/{C}/g, callbackId)); | |
| + script.addEventListener("load", cleanup, false); | |
| + (head = document.head).appendChild(script); | |
| + } | |
| + | |
| + function abort(hard) { | |
| + if (dequeue(send)) return true; | |
| + if (hard && script) { head.removeChild(script); return true; } | |
| + return false; | |
| + } | |
| + | |
| + function cleanup() { | |
| + active--; | |
| + head.removeChild(script); | |
| + delete window[callbackId]; | |
| + process(); | |
| + } | |
| + | |
| + queued.push(send); | |
| + process(); | |
| + return {about: abort}; | |
| + } | |
| + | |
| + return { | |
| + text: text, | |
| + xml: xml, | |
| + json: json, | |
| + jsonp: jsonp, | |
| + image: image | |
| + }; | |
| })(); | |
| diff --git a/src/Url.js b/src/Url.js | |
| index b4798f6..f786769 100644 | |
| --- a/src/Url.js | |
| +++ b/src/Url.js | |
| @@ -8,6 +8,7 @@ po.url = function(template) { | |
| return template.replace(/{(.)}/g, function(s, v) { | |
| switch (v) { | |
| case "S": return hosts[(Math.abs(c.zoom) + c.row + column) % hosts.length]; | |
| + case "C": return "{C}"; | |
| case "Z": return c.zoom; | |
| case "X": return column; | |
| case "Y": return c.row; |
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