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// ==UserScript==
// @name ShowStatusSequence
// @namespace http://www.madin.jp/diary/?date=20081023
// @description 個別 post のページを開いたとき、それを含むユーザページに移動し、文脈を把握できるようにする
// @include http://twitter.com/*
// @include https://twitter.com/*
// @include http://explore.twitter.com/*
// ==/UserScript==
/**
author: Maripo GODA
version: 0.0.3
detail: http://www.madin.jp/diary/?date=20081023#p01
20081022 公開
20081023 /status/ と /statuses/ の両方に対応
20081024 /status/ と /statuses/ の両方に対応
自動ジャンプ/手動ジャンプ、自動検索/手動検索をそれぞれ切り替え可能に
explore.twitter.com に対応
20081025 160ページ以降 (Twitter の表示制限) の処理
*/
const JUMP_AUTOMATICALLY = true; //false にすると、自動でジャンプする代わりに当該ページへのリンクを表示する
const START_BY_BUTTON_EVENT = true; //true にするとボタンを押して検索開始、false にするとアクセス次第検索開始
const TWITTER_PAGE_INDEX_LIMIT = 160; //160ページまでしか存在しない
var ShowStatusSequence = {
};
ShowStatusSequence.search = function (pageNum) {
var http = new XMLHttpRequest();
http.open('GET', ShowStatusSequence.baseUrl + '?page=' + pageNum, true);
ShowStatusSequence.messageArea.showMessage ('Searching in page ' + pageNum);
http.onreadystatechange = function () {
if (http.readyState != 4) return;
else if (http.status == 200) {
try {
linkList = getElementsByXPath('//a[@class="entry-date"]', createHTMLDocumentByString(http.responseText));
if (linkList.length == 0) ShowStatusSequence.search(ShowStatusSequence.getNextPageNum(pageNum, false));
else {
var pageRegExp = new RegExp('[0-9]+$');
var maxId = parseInt(linkList[0].href.match(pageRegExp), 10);
var minId = parseInt(linkList[linkList.length - 1].href.match(pageRegExp), 10);
if (maxId >= ShowStatusSequence.targetId && ShowStatusSequence.targetId >= minId) {
GM_setValue('ShowStatusSequence_targetId', ShowStatusSequence.targetId);
if (JUMP_AUTOMATICALLY) {
location.href = ShowStatusSequence.baseUrl + '?page=' + pageNum;
ShowStatusSequence.messageArea.showMessage ('Moving...');
} else {
ShowStatusSequence.messageArea.showMessage ('<a href="' + ShowStatusSequence.baseUrl + '?page=' + pageNum + '" target="blank">[link]</a>');
}
}
else if (maxId < ShowStatusSequence.targetId) ShowStatusSequence.search(ShowStatusSequence.getNextPageNum(pageNum, false));
else if (minId > ShowStatusSequence.targetId) {
if (pageNum == TWITTER_PAGE_INDEX_LIMIT) {
ShowStatusSequence.messageArea.showMessage ('Too old.');
return;
}
else ShowStatusSequence.search(ShowStatusSequence.getNextPageNum(pageNum, true));
}
}
} catch (ex) {ShowStatusSequence.printError (ex)}
} else ShowStatusSequence.messageArea.showMessage ('HTTP error ' + http.status);
}
http.send(null);
};
ShowStatusSequence.emphasizeNode = function (node) {
// change color
node.style.backgroundColor = '#ffff88';
// scroll
var height = node.clientHeight;
var offset = 0;
var tmpNode = node;
while (document.body != tmpNode) {
offset += tmpNode.offsetTop;
tmpNode = tmpNode.offsetParent;
}
var centerY = offset + node.offsetHeight/2;
if (window.innerHeight/2 < centerY) {
window.scroll (0, centerY - window.innerHeight/2);
}
};
ShowStatusSequence.printError = function (message) {
ShowStatusSequence.messageArea.showMessage (message);
};
ShowStatusSequence.getSearchStartAction = function () {
return function () {
ShowStatusSequence.messageArea.style.display = 'block';
ShowStatusSequence.search(1);
};
};
ShowStatusSequence.appendMessageArea = function () {
ShowStatusSequence.messageArea = document.createElement('DIV');
with (ShowStatusSequence.messageArea.style) {
backgroundColor ='white';
MozOpacity = 0.8;
position = 'absolute';
left = '3px';
top = '3px';
zIndex = 2;
padding = '10px';
border = '1px solid gray';
display = 'none';
}
ShowStatusSequence.messageArea.showMessage = function (message) {
ShowStatusSequence.messageArea.innerHTML = message;
};
document.body.appendChild(ShowStatusSequence.messageArea);
};
ShowStatusSequence.getNextPageNum = function (number, searchForward) {
var nextPageNum = (function () {
// Calculate search limit
var maxCoff = 0;
while (true) {
var max = Math.pow(2, maxCoff);
if (max == number && searchForward) return max * 2;
else if (max >= number) break;
maxCoff ++;
}
var current = Math.pow(2, maxCoff);
var spanCoff = maxCoff - 1;
// Binary search
while (true) {
spanCoff --;
if (spanCoff < 0) throw 'Something is going wrong...';
var span = Math.pow(2, spanCoff);
if (current == number) return (searchForward)? current + span : current - span;
else if (current < number) {
current += span;
}
else if (current > number) {
current -= span;
}
}
})();
if (TWITTER_PAGE_INDEX_LIMIT >= nextPageNum) return nextPageNum;
else return ShowStatusSequence.getNextPageNum(nextPageNum,false);
};
(function () {
// Fetch user's pages
if (new RegExp('^https?://(?:explore\\.)?twitter\\.com/[0-9a-zA-Z_]+/status(|es)/[0-9]+$').test(location.href)) {
ShowStatusSequence.appendMessageArea();
ShowStatusSequence.targetId = parseInt(location.href.match('[0-9]+$'), 10);
ShowStatusSequence.baseUrl = location.href.replace(new RegExp('/status(|es)/.*'), '');
var currentPage = 1;
if (START_BY_BUTTON_EVENT) {
var startButton = document.createElement('INPUT');
startButton.value = 'Search';
startButton.type = 'button';
startButton.style.marginLeft = '10px';
startButton.style.fontSize = 'large';
startButton.style.fontWeight = 'normal';
var element = getElementsByXPath('//div[@class="full-name"]', document.body)[0] || getElementsByXPath('//div[@class="screen-name"]', document.body)[0];
element.appendChild(startButton);
startButton.addEventListener('click', ShowStatusSequence.getSearchStartAction(), true);
}
else (ShowStatusSequence.getSearchStartAction())();
}
else if (new RegExp('^https?://(?:explore\\.)?twitter\\.com/[0-9a-zA-Z_]+\\?page=[0-9]+$').test(location.href)) {
// Find target post and emphasize it
try {
var targetId = GM_getValue('ShowStatusSequence_targetId');
if (!targetId) return;
linkList = getElementsByXPath('//a[@class="entry-date"]', document.body);
for (var i = 0, l = linkList.length; i < l; i ++) {
if (targetId == linkList[i].href.match('[0-9]+$')) {
var node = linkList[i];
while ('undefined' != typeof node) {
if ('LI' == node.nodeName.toUpperCase()) {
ShowStatusSequence.emphasizeNode (node);
return;
}
node = node.parentNode;
}
}
}
} catch (ex) {alert(ex);}
}
})();
function createHTMLDocumentByString (str) {
var html = str.replace(/^[\s\S]*?<html(?:[ \t\r\n][^>]*)?>[ \t\n\r]*|[ \t\r\n]*<\/html[ \t\r\n]*>[\S\s]*$/ig, '');
var htmlDoc = document.implementation.createDocument(null, 'html', null);
var fragment = createDocumentFragmentByString(html);
try {
fragment = htmlDoc.adoptNode(fragment);
} catch (e) {
fragment = htmlDoc.importNode(fragment, true);
}
htmlDoc.documentElement.appendChild(fragment);
return htmlDoc;
}
function createDocumentFragmentByString (str) {
var range = document.createRange();
range.setStartAfter(document.body);
return range.createContextualFragment(str);
}
function getElementsByXPath (xpath, node) {
var node = node || document;
var doc = node.ownerDocument ? node.ownerDocument : node;
var nodesSnapshot = doc.evaluate(xpath, node, null,
XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
var data = [];
for (var i = 0, l = nodesSnapshot.snapshotLength; i < l; i ++) {
data.push(nodesSnapshot.snapshotItem(i));
}
return data;
}
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