Auto Readable

Auto readable on load.

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name           Auto Readable
// @description:en Auto readable on load.
// @version        0.1
// @namespace      https://twitter.com/foldrr
// @include        http://*
// @description Auto readable on load.
// ==/UserScript==
(function(){
    var d = document;
    var href = d.location.href;
    var body = d.getElementsByTagName('body')[0];
    
    // 設定
    var DEBUG = false;
    var includes = [
        "/blog.livedoor.jp/",
        "/blogs.yahoo.co.jp/",
        "/ameblo.jp/",
        "/gigazine.net/",
        ".fc2.com/"
    ];
    var MARGIN_LEFT = body.offsetWidth * 0.20;
    var MARGIN_RIGHT = body.offsetWidth * 0.25;
    var BODY_WIDTH = body.offsetWidth * 0.60;
    
    // 指定したサイト以外なら終了。
    for(var i = 0, n = includes.length; i < n; i++){
        if(0 <= href.indexOf(includes[i])){
            break;
        }
    }
    if(i == includes.length){
        return;
    }
    
    // String拡張: タグを削除する。
    String.prototype.stripTags = function(){
        return this.replace(/^.+?>/, "")
                   .replace(/<\/.+/, "")
                   .replace(/<!.+/, "");
    };
    
    // String拡張: 改行を削除する。
    String.prototype.chomp = function(){
        return this.replace(/(\r|\n)/, "");
    };
    
    // メイン処理
    (function(){
        // 本文への目印としてヘッダーを取得。
        var heads = [];
        pushHeaders(heads, "h3");
        pushHeaders(heads, "h2");
        pushHeaders(heads, "h1");
        
        // ページタイトルに似ているヘッダから本文を判別。
        var title = d.title;
        var target = null;
        for(var i = 0, n = heads.length; i < n; i++){
            var text = getText(heads[i]);
            p(text);
            if(10 < text.length){
                if(title.indexOf(text) !== -1){
                    target = heads[i];
                    break;
                }
            }
        }
        
        // 本文が見つかればページを編集。
        p("target = " + !!target);
        if(target){
            // スタイルを無効化。
            for(var i = 0, n = d.styleSheets.length; i < n; i++){
                d.styleSheets[i].disabled = true;
            }
            
            // ページ内容を生成。
            var parent = target.parentNode.parentNode;
            target.parentNode.style.width = BODY_WIDTH + "px";
            
            // 本文のタイトルを削除。
            target.parentNode.removeChild(target);
            
            // 本文のタイトルを再設定。
            var a = d.createElement("a");
            a.innerHTML = title;
            a.href = href;
            
            var t = d.createElement("h1");
            t.appendChild(a);
            
            parent.insertBefore(t, parent.childNodes[0]);
            
            // BODYを設定。
            body.style.marginLeft = MARGIN_LEFT + "px";
            body.style.marginRight = MARGIN_RIGHT + "px";
            body.innerHTML = parent.innerHTML;
        }
    })();
    
    // 指定したタグ名の要素を配列に加える。
    function pushHeaders(dst, tagName){
        var es = d.getElementsByTagName(tagName);
        for(var i = 0, n = es.length; i < n; i++){
            dst.push(es[i]);
        }
    }
    
    // ヘッダのテキストを取得する。
    function getText(x){
        return x.innerHTML.stripTags().chomp();
    }
    
    // デバッグプリント。
    function p(x){
        if(DEBUG){
            GM_log(x.toString());
        }
    }
})();