Twitter Prompt (iframe.postMessage)

twPrompt.js

// ==UserScript==
// @name Twitter Prompt
// @include http://twitter.com/share?url=www.u.js
// @description Tweet via window.prompt
// ==/UserScript==

/* Bookmarklet */
if (false) {
javascript: (function(s, f, t, m, l) {
    if (s = prompt('いまどうしてる？', s)) {
        if ((l = s.length) > 140 &&
        (m = s.match(/https:\/\/\S{11,}|http:\/\/\S{12,}/g))) {
            l = l - m.join('').length + m.length * 19;
        }
        if (confirm(s.slice(0, 140) +
        '\n\nあと\x20' + (140 - l) + '\x20字入力可能')) {
            addEventListener('message', function(v) {
                v.data == t && f.parentNode.removeChild(f) &&
                removeEventListener(v.type, arguments.callee, true);
                
            }, true);
            f = document.createElement('iframe');
            f.style.display = 'none';
            f.onload = function() {
                f.contentWindow.postMessage((t = +new(Date)) + '&' +
                encodeURIComponent(s), '*')
            };
            f.src = 'http://twitter.com/share?url=www.u.js';
            document.body.appendChild(f)
        } else { arguments.callee(s) }
    }
})(encodeURI(decodeURI(location)))
}

/* Main */
opera.addEventListener("BeforeScript", function(v) {
    v.preventDefault();
}, true);
opera.addEventListener("BeforeExternalScript", function(v) {
    v.preventDefault();
}, true);
window.addEventListener("message", function(v) {
    twitterPrompt(decodeURIComponent(v.data.split("&")[1]));
    function twitterPrompt(tweet) {
        if (!document.getElementsByName("authenticity_token")[0]) {
            return exit("ログインしてやり直して下さい", tweet);
        }
        if (tweet.length > 140) {
            var longurls = tweet.match(/https:\/\/\S{11,}|http:\/\/\S{12,}/g);
            if (longurls) {
                longurls.forEach(function(url) {
                    var xhr = new XMLHttpRequest;
                    xhr.open("GET",
                    "/share?url=" + encodeURIComponent(url), false);
                    xhr.onreadystatechange = function() {
                        if (this.readyState < 4) return;
                        if (this.status === 200) {
                            tweet = tweet.replace(url, this.responseText.
                            match(/aria-describedby=\"notice\"> ([^<]+)/)[1]);
                        } else exit(this.getAllResponseHeaders(), tweet);
                    };
                    xhr.send(null);
                });
            }
        }
        if (!confirm(tweet.slice(0, 140) +
        "\n\nこの文をツイートします")) return exit();
        var xhr = new XMLHttpRequest;
        xhr.open("POST", "/status/update", true);
        xhr.setRequestHeader("Content-Type",
        "application/x-www-form-urlencoded")
        xhr.onreadystatechange = function() {
            if (this.readyState < 4) return;
            if (this.status === 200) {
                exit();
            } else exit(this.getAllResponseHeaders(), tweet);
        };
        xhr.send("authenticity_token=" +
        document.getElementsByName("authenticity_token")[0].value +
        "&status=" + encodeURIComponent(tweet));
    };
    function exit(msg, query) {
        if (msg !== void 0 && query !== void 0) prompt(Error(msg), query);
        v.source.postMessage(v.data.split("&")[0], "*");
    };
}, true);