LDRize/Extension/jkScroll

LDRizeが無効なサイトでもj,kでスクロール by 958

概要

• LDRizeが無効のときには、"j","k"キーで上下に移動できるようにする SeaHorseスクリプト
• ついでにLDRizeが有効のときには、"S-j","S-k"キーで上下に固定量スクロールする（ver 0.02で追加）

• 流用元
  • ScrollCommand - 枕をそばだてて聴く

必須拡張

• SeaHorse 1.1.1 以上
• UserAction Extension 1.0.0 以上

動作確認環境

• Windows XP SP2
• Internet Explorer 7
• Sleipnir 2.7.0
• Seahorse 1.1.2
• UserAction Extension 1.0.1

インストール

• ソースをコピーし、テキストエディタに貼り付け
• 貼り付けたソース内の全角文字「ｏｎｕｎｌｏａｄ」「ｏｎｋｅｙｄｏｗｎ」を半角文字に置換する（wikiwiki.jpのセキュリティ対策のせいで、半角だと貼り付けられませんでした）
• sleipnir のインストールディレクトリ\plugins\seahorse\jkscroll.user.js に保存

ソース

// ==UserScript==
// @name           j k Scroll
// @description    Press j or k key , and scroll (in case that LDRize are not working on its page)
// @include        http*
// @exclude        http://fastladder.com/reader/*
// @exclude        http://www.bloglines.com/*
// @exclude        http://mail.google.*/*
// @exclude        https://mail.google.*/*
// @exclude        http://www.google.*/reader/*
// @exclude        https://www.google.*/reader/*
// @exclude        http://b.hatena.ne.jp/*
// @exclude        http://reader.livedoor.com/reader/*
// @exclude        http://*rememberthemilk.com/*
// @version        0.0.2
// ==/UserScript==

//流用元
// name           ScrollCommand
// namespace      http://d.hatena.ne.jp/Constellation/
// description    Press j or k key , and scroll (in case that LDRize are not working on its page)
// include        *
// author         Constellation
// version        0.0.1

setTimeout(function() {try{
	var SCROLLHEIGHT = 200;

	var documentBody = (document.compatMode == "CSS1Compat") ? document.documentElement : document.body;

	var SmoothScroll = {
		steps : 20,
		duration : 100,

		destinationx: null,
		destinationy: null,
		timerID: null,
		callBackFunc: null,
		setCallback : function(f) {
			this.callBackFunc = f;
		},
		stop : function() {
			if (this.timerID != null) {
				clearTimeout(this.timerID);
				this.timerID = null;
			}
			if ((this.destinationx != null) && (this.destinationy != null)) {
				scrollTo(this.destinationx, this.destinationy);
				this.destinationx = null;
				this.destinationy = null;
			}
		},
		scrollTo : function(destX, destY){
			this.destinationx = destX;
			this.destinationy = destY;
			this.step = 0;
			var self = this;
			this.prevY = -1;

			self.timerID = setTimeout(function() {
				var y = documentBody.scrollTop;

				yy = self.destinationy - ((self.destinationy - y) / 2);
				if ((y == self.prevY) || (Math.abs(self.destinationy - yy) < 1) || (self.step + 1 == self.steps)) {
					scrollTo(self.destinationx, self.destinationy);
					setTimeout(function() { if (self.callBackFunc != null) self.callBackFunc(); }, 10);
					self.destinationx = null;
					self.destinationy = null;
				} else {
					scrollTo(self.destinationx, yy);
					self.timerID = setTimeout(arguments.callee, (self.duration / self.steps) * (self.step + 1));
				}
				self.step++;
				this.prevY = y;
			}, (this.duration / this.steps) * this.step + 1);
		}
	};

	var ShortcutKey = {
		repKey: {
			'8': 'BS','9': 'TAB','13': 'Enter','27': 'ESC',
			'33': 'PageUp','34': 'PageDown',
			'35': 'End','36': 'Home',
			'37': 'Left','38': 'Up','39': 'Right','40': 'Down',
			'45': 'Insert','46': 'Delete',
			'188': ',', '189': '-', '190': '.','191': '/', '192': '@',
			'219': '[', '220': '\\', '221': ']', '222': '^', '226': '\\'
		},
		deepKey: ['ESC', 'TAB', 'Home', 'End', 'Insert', 'Delete', 'C-.+', 'A-.+'].join('|'),
		keyEvent: [],
		init: function() {
			document.body.attachEvent('ｏｎｋｅｙｄｏｗｎ', ShortcutKey.keyHandle);
			window.attachEvent('ｏｎｕｎｌｏａｄ', function() {
				document.body.detachEvent('ｏｎｋｅｙｄｏｗｎ', ShortcutKey.keyHandle);
				window.detachEvent('ｏｎｕｎｌｏａｄ', arguments.callee);
			});
		},
		keyHandle: function(event) {
			var event = window.event;
			var key = '';
			var rep = false;
			for (var i in ShortcutKey.repKey) {
				if (i == event.keyCode) {
					key = ShortcutKey.repKey[i];
					rep = true;
					break;
				}
			}
			if (key == '')
				key = String.fromCharCode(event.keyCode).toLowerCase();
			key = (event.shiftKey) ? "S-" + key : key;
			key = (event.ctrlKey) ? "C-" + key : key;
			key = (event.altKey || event.metaKey) ? "A-" + key : key;
			var re = new RegExp(ShortcutKey.deepKey);
			var isDeep = re.test(key);
			if ((document.activeElement.tagName.match(/input|textarea/i)) && (!isDeep)) return;
			var func = ShortcutKey.keyEvent[key];
			if(func){
				func();
				event.cancelBubble = true;
				event.returnValue = false;
			}
		},
		add: function(key, func) {
			ShortcutKey.keyEvent[key] = func;
		}
	}

	ShortcutKey.init();
	if ((window.LDRize) && (window.LDRize.getCurrentParagraph())) {
		window.LDRize.addKeyBind('S-j', function() {
			SmoothScroll.stop();
			SmoothScroll.scrollTo(0, documentBody.scrollTop + SCROLLHEIGHT);
		});
		window.LDRize.addKeyBind('S-k', function() {
			SmoothScroll.stop();
			SmoothScroll.scrollTo(0, documentBody.scrollTop - SCROLLHEIGHT);
		});
	} else {
		ShortcutKey.add('j', function() {
			SmoothScroll.stop();
			SmoothScroll.scrollTo(0, documentBody.scrollTop + SCROLLHEIGHT);
		});
		ShortcutKey.add('k', function() {
			SmoothScroll.stop();
			SmoothScroll.scrollTo(0, documentBody.scrollTop - SCROLLHEIGHT);
		});
	}
}catch(e){}
}, 0);