fastforward.uc.js

// ==UserScript==
// @name           fastforward.uc.js
// @namespace      http://d.hatena.ne.jp/Griever/
// @include        main
// @compatibility  Firefox 4.0
// @charset        UTF-8
// @license        MIT License
// @version        0.0.1
// @note           昔作ったものが埋もれていたので公開
// ==/UserScript==
/*

スペースキーでこれ以上スクロールできない場合、次のページを自動的に読み込む。
uAutoPagerize があるときは SITEINFO を利用して次のページを探す。
uAutoPagerize, OwataPagerize が次のページを読み込み中なら実行されないようにしてある。

*/
(function(){

// 完全一致
var full = [
"→","次","つぎ","次→","次㌻→","＞",">",">>","»",
"もっと読む","もっと","#次→","[次]","load more","さらに読み込む",
":: next ::"
];

// 前方一致
var prefix = [
"next","NEXT","Next",
"次の","次を","次に","次へ",
"つぎの","つぎを","つぎに","つぎへ",
"次頁","次項","次ページ",
"進む","先へ","続く","続き","記事本文","過去の",
"次㌻"
];


window.fastforward = {
	full: full,
	prefix: prefix,
	microformat: '//link[contains(concat(" ", translate(normalize-space(@rel), "ENTX", "entx"), " "), " next ")] | //a[contains(concat(" ", translate(normalize-space(@rel), "ENTX", "entx"), " "), " next ")]',
	_xpath: '',
	get xpath() {
		return this._xpath || this.makeXPath();
	},
	get focusedWindow() {
		var win = document.commandDispatcher.focusedWindow;
		return (!win || win === window) ? content : win;
	},
	
	init: function() {
		var key = document.createElement("key");
		key.setAttribute("id", "fastforward-key");
		key.setAttribute("key", " ");
		key.setAttribute("oncommand", "fastforward.spaceKey(event);");
		document.getElementById("mainKeyset").appendChild(key);
	},

	makeXPath: function() {
		var fx = this.full.map(function(word) {
			return 'normalize-space(.)=' + escapeXPathExpr(word) +'';
		}).join(' or ');
		var px = this.prefix.map(function(word) {
			return 'starts-with(normalize-space(.), ' +  escapeXPathExpr(word) +')';
		}).join(' or ');

		return this._xpath = [
			'//text()[' + fx + ' or ' + px + ']/ancestor-or-self::*[@href or local-name()="button" or local-name()="BUTTON"]'
			,'//*[local-name()="img" or local-name()="IMG" or local-name()="input" or local-name()="INPUT"]'
			 + '[' + (fx + ' or ' + px).replace(/\(\.\)/g, '(@alt | @value | @title)') + ']'
			 + '/ancestor-or-self::*[@href or @type="submit" or @type="SUBMIT" or @type="button" or @type="BUTTON"]'
//			'//text()[' + fx + ' or ' + px + ']/ancestor-or-self::*[@href]'
//			,'//img[' + (fx + ' or ' + px).replace(/\(\.\)/g, '(@alt)') + ']/ancestor-or-self::*[@href]'
//			,'//input[' + (fx + ' or ' + px).replace(/\(\.\)/g, '(@value)') + ']' + '[@type="submit" or @type="SUBMIT" or @type="button" or @type="BUTTON"]'
		].join('|');
	},

	next: function(win) {
		win || (win = this.focusedWindow);
		let [nextLink, nextURL] = this.getNext(win);
		if (nextURL) {
			win.location.href = nextURL;
		}
		else if (nextLink) {
			dispatchMouseEvents({ target:nextLink });
		}
	},
	getNext: function(win) {
		win || (win = this.focusedWindow);
		var doc = win.document;
		var { URL, domain } = doc;
		var [nextLink, nextURL] = [null, ""];

		// uAutoPagerize,OwataPagerizeが次のURLを見つけていればそれを使う
		// loading 中なら実行しない
		if (win.ap) {
			if (win.ap.state == "loading") return [nextLink, nextURL];
			if (win.ap.requestURL) return [nextLink, win.ap.requestURL];
		}
		else if (win.OwataPagerize) {
			if (win.OwataPagerize.state == "loading") return [nextLink, nextURL];
			if (win.OwataPagerize.info.nextURL) return [nextLink, win.OwataPagerize.info.nextURL];
		}

		// uAutoPagerizeがあればSITEINFOを一度だけチェックする
		if (window.uAutoPagerize && !win.ffSiteinfoChecked) {
			win.ffSiteinfoChecked = true;
			let info = null;
			if (!info) [, info] = uAutoPagerize.getInfo(uAutoPagerize.MY_SITEINFO, win);
			if (!info) [, info] = uAutoPagerize.getInfo(uAutoPagerize.SITEINFO, win);
			if (!info) [, info] = uAutoPagerize.getInfo(uAutoPagerize.MICROFORMAT, win);
			if (info) {
				nextLink = $X1(info.nextLink, doc);
				if (nextLink) return [nextLink, nextLink.href];
			}
		}

		var x = $X(this.xpath, doc);
		if (x.length > 0) {
			x.some(function(elem) {
				// hostを持ってない要素(button), 同一host, javascripスキームならOK
				if (!"host" in elem || elem.host == domain || elem.protocol == "javascript:") {
					nextLink = elem;
					nextURL = elem.href || "";
					return true;
				}
			})
			return [nextLink || x.pop(), nextURL];// 条件を満たさなかったら最後の要素を"次"とする
		}

		if (/\d/.test(URL)) {
			let newURL = this.incrementURL(URL, +1);
			if (newURL !== domain) {
				nextURL = newURL;
				// 増加させた URL のリンクがあるかチェック
				nextLink = doc.querySelector('[href$="' + nextURL.split("/").pop() + '"]');
			}
		}
		if (!nextLink) {
			nextLink = $X1(this.microformat, doc);
		}
		return [nextLink, nextURL];
	},
	incrementURL: function(url, aIncrement) {
		// page=n は優先的に増やす
		return /\bpage=\d/.test(url) ? 
			url.replace(/(.*?(?:\bpage=))(\d+)(.*?)/g, re):
			url.replace(/(.*)(\d+)(\D*?)$/, re);

		function re(str, left, num, right) {
			return left + format0((parseInt(num, 10) + (aIncrement || 1)), (num+'').length) + right;
		}
	},
	spaceKey: function(event) {
		var win = this.focusedWindow;
		if (win.scrollMaxY > win.scrollY) {
			goDoCommand("cmd_scrollPageDown");
			return;
		}
		fastforward.next(win);
	}
};
fastforward.init();



// http://os0x.g.hatena.ne.jp/os0x/20080515/1210821896
function format0(str, len){
	return ('_' + Math.pow(10,len) + str).slice(-len);
}

// http://d.hatena.ne.jp/amachang/20090917/1253179486
function escapeXPathExpr(text) {
	var matches = text.match(/[^"]+|"/g);
	function esc(t) {
		return t == '"' ? ('\'' + t + '\'') : ('"' + t + '"');
	}
	if (matches) {
		if (matches.length == 1) {
			return esc(matches[0]);
		} else {
			var results = [];
			for (var i = 0, len = matches.length; i < len; i ++) {
				results.push(esc(matches[i]));
			}
			return 'concat(' + results.join(', ') + ')';
		}
	} else {
		return '""';
	}
}

function $X(exp, context) {
	var _document = context.ownerDocument || context;
	var x = _document.evaluate(exp, context, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
	var h = [];
	for (var i = 0, l = x.snapshotLength; i < l; i++) {
		h[i] = x.snapshotItem(i);
	}
	return h;
}

function $X1(exp, context) {
	var _document = context.ownerDocument || context;
	var x = _document.evaluate(exp, context, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null);
	return x.singleNodeValue;
}

function $(id){ return document.getElementById(id); }
function $$(selector, e) { return $A((e || document).querySelectorAll(selector));}
function $A(likeArray) { return Array.prototype.slice.call(likeArray); }
function log() { Application.console.log(Array.prototype.slice.call(arguments)); }

function dispatchMouseEvents(opt) {
	var evt = opt.target.ownerDocument.createEvent("MouseEvents");
	evt.initMouseEvent(
		opt.type||"click", opt.canBubble||true, opt.cancelable||true, opt.view||opt.target.ownerDocument.defaultView, 
		opt.detail||0, opt.screenX||0, opt.screenY||0, opt.clientX||0, opt.clientY||0, 
		opt.ctrlKey||false, opt.altKey||false, opt.shiftKey||false, opt.metaKey||false, 
		opt.button||0, opt.relatedTarget||null);
	opt.target.dispatchEvent(evt);
	return evt;
}

})();