スマホの入力を簡単にする?「Two Same Input」

【更新履歴】

・2026/1/30 バージョン1.0公開。
・2026/1/30 バージョン1.1公開。
・2026/1/31 バージョン1.3公開。


画像
画像
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・ダウンロードされる方はこちら。↓

・ソースコードはこちら。↓

<!DOCTYPE html>
<html lang="ja">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
<title>Two Same Input 1.3.1</title>
<style>
    :root {
        --bg-color: #121212;
        --text-color: #fff;
        
        /* 行カラー */
        --c-a: #e60012; --c-k: #004098; --c-s: #40e0d0; --c-t: #ffd900;
        --c-n: #009944; --c-h: #ff69b4; --c-m: #800080; --c-y: #f39800;
        --c-r: #b08d55; --c-w: #6cbb5a;
        --c-sym: #555555;
        
        /* タブカラー */
        --tab-hira: #6f4b3e; --tab-kata: #1d2088; --tab-lower: #ff69b4;
        --tab-upper: #c71585; --tab-num: #40e0d0; --tab-sym: #009944;
        --tab-emoji: #ffd900;

        /* ボタン色 */
        --col-ent: #ffd900;
        --col-ctl: #40e0d0;
        
        /* カーソル色 */
        --cursor-color: #00ffff; /* シアン */
    }

    /* 点滅アニメーション定義 */
    @keyframes border-blink {
        0%   { border-color: var(--cursor-color); box-shadow: 0 0 5px var(--cursor-color); }
        50%  { border-color: transparent; box-shadow: none; }
        100% { border-color: var(--cursor-color); box-shadow: 0 0 5px var(--cursor-color); }
    }

    body {
        margin: 0; padding: 0;
        background-color: var(--bg-color);
        color: var(--text-color);
        font-family: "Hiragino Kaku Gothic ProN", sans-serif;
        height: 100vh; height: 100dvh; width: 100vw;
        display: flex; flex-direction: column;
        overflow: hidden; user-select: none; touch-action: none; 
    }

    /* --- 上部エリア --- */
    #top-area {
        padding-top: max(env(safe-area-inset-top), 20px);
        padding-bottom: 5px; padding-left: 5px; padding-right: 5px;
        flex-shrink: 0; z-index: 100; box-sizing: border-box;
        background: #000; border-bottom: 2px solid #333;
        display: flex; flex-direction: column; gap: 5px;
    }

    #top-area.fullscreen {
        height: 92%; position: absolute; top: 0; left: 0; right: 0;
        background: #000;
    }

    #display-wrapper {
        display: flex; align-items: stretch;
        height: 120px; gap: 5px;
    }

    #line-indicator {
        width: 45px; 
        display: flex; flex-direction: column; 
        align-items: center; justify-content: flex-start;
        padding-top: 8px;
        background: #111; border-radius: 4px; flex-shrink: 0;
        line-height: 1.0;
    }
    .ln-num { font-size: 22px; font-weight: bold; color: #fff; }
    .ln-label { font-size: 11px; color: #fff; margin-top: 2px; }

    #input-line {
        font-size: 18px; line-height: 1.5;
        white-space: pre-wrap; overflow-y: auto;
        flex: 1;
        border: 2px solid #555; background: #ffffff; color: #000000;
        padding: 8px; border-radius: 6px;
        word-break: break-all;
        outline: none; caret-color: #000;
    }
    [contenteditable] { -webkit-user-select: text; user-select: text; }
    
    .composing-span { background: #d0ebff; border-bottom: 2px solid #00b4d8; }

    .side-controls {
        display: grid;
        grid-template-columns: 1fr 1fr;
        grid-template-rows: 1fr 1fr;
        gap: 3px; width: 90px; flex-shrink: 0;
    }
    .ctrl-btn {
        border: 2px solid transparent; /* 枠線スペース確保 */
        border-radius: 4px;
        color: #000; font-size: 16px; font-weight: bold;
        cursor: pointer; display: flex; align-items: center; justify-content: center;
        background: var(--col-ctl); 
        box-sizing: border-box;
    }
    .btn-ent { background: var(--col-ent); font-size: 22px; color: #000; } 
    .btn-full { background: var(--col-ctl); color: #000; font-size: 18px; border: 1px solid #333; }

    /* 共通ホバーエフェクト (点滅カーソル) */
    .ctrl-btn:hover, .ctrl-btn:active,
    .sub-btn:hover, .sub-btn:active,
    .key:hover, .key:active,
    .cand-chip:hover, .cand-chip:active {
        border: 2px solid var(--cursor-color);
        animation: border-blink 0.8s infinite;
        z-index: 10;
        position: relative;
    }

    #sub-bar {
        height: 70px; display: flex; gap: 5px; flex-shrink: 0; align-items: stretch;
    }
    #candidate-bar {
        flex: 1; display: flex; flex-wrap: wrap; align-content: flex-start; overflow-y: auto;
        background: #222; padding: 4px; border-radius: 4px; gap: 4px;
    }
    .cand-chip {
        background: #444; padding: 6px 12px;
        border-radius: 12px; font-size: 14px; border: 2px solid transparent;
        height: 28px; box-sizing: border-box; display: flex; align-items: center; color: #fff;
        cursor: pointer;
    }
    
    .sub-tools {
        display: grid;
        grid-template-columns: 1fr 1fr;
        grid-template-rows: 1fr 1fr;
        gap: 3px; width: 90px; flex-shrink: 0;
    }
    .sub-btn {
        border: 2px solid transparent; border-radius: 4px;
        font-size: 12px; font-weight: bold;
        display: flex; align-items: center; justify-content: center;
        cursor: pointer; box-sizing: border-box;
    }
    .btn-mov { background: var(--col-ctl); color: #000; font-size: 14px; }
    .btn-cpy { background: #2a9d8f; color: #fff; }
    .btn-pst { background: #e76f51; color: #fff; }

    /* --- メインエリア --- */
    #main-stage {
        flex: 1; position: relative; overflow: hidden;
        background: #111; padding: 4px;
    }

    #twothumb-board {
        display: grid;
        grid-template-columns: 1fr 2.8fr; 
        /* ★ここに隙間を設定(グループ分けのため広めに) */
        gap: 16px; 
        height: 100%; width: 100%; box-sizing: border-box;
    }
    
    /* 左パネル */
    #left-panel { 
        display: grid; grid-template-columns: 1fr; grid-auto-rows: 1fr; gap: 4px; 
    }
    #left-panel.jp-layout {
        grid-template-columns: 1fr 1fr; grid-template-rows: repeat(6, 1fr);
    }

    /* 右パネル */
    #right-panel { 
        display: grid; grid-template-columns: repeat(3, 1fr); grid-template-rows: repeat(4, 1fr); gap: 4px; 
    }
    #right-panel.jp-layout {
        grid-template-columns: repeat(3, 1fr); grid-template-rows: repeat(5, 1fr);
    }
    #right-panel.sym-layout {
        grid-template-columns: repeat(2, 1fr); grid-template-rows: repeat(4, 1fr);
    }

    .key {
        display: flex; align-items: center; justify-content: center;
        font-weight: bold; border-radius: 6px; 
        font-size: 22px; 
        cursor: pointer; color: #fff;
        box-shadow: 0 3px 0 rgba(0,0,0,0.3);
        /* 枠線分のスペースを確保してレイアウト崩れを防ぐ */
        border: 3px solid transparent; 
        box-sizing: border-box;
        text-align: center; line-height: 1.1;
        transition: none; /* 点滅を優先 */
    }
    
    /* 日本語モード時の選択中行ボタン */
    .key-left.active {
        /* 点滅カーソル適用 */
        border-color: var(--cursor-color);
        animation: border-blink 1s infinite;
        filter: brightness(1.2);
        z-index: 5;
    }

    .font-emoji { 
        font-family: "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji", sans-serif; 
    }

    /* 色定義 */
    .row-a { background: var(--c-a); } .row-k { background: var(--c-k); }
    .row-s { background: var(--c-s); color: #000; text-shadow: none; }
    .row-t { background: var(--c-t); color: #000; text-shadow: none; }
    .row-n { background: var(--c-n); } .row-h { background: var(--c-h); }
    .row-m { background: var(--c-m); } 
    .row-y { background: var(--c-y); color: #000; text-shadow: none; }
    .row-r { background: var(--c-r); } .row-w { background: var(--c-w); }
    .row-sym { background: var(--c-sym); }
    
    .key-del { background: #d62828; font-size: 16px; }

    .key-cat { background: #333; border: 1px solid #555; font-size: 13px; color: #fff; }
    .key-cat.active { background: #eee; color: #000; border: 3px solid #fff; } /* ページ選択は白枠固定でも可だが、ここも点滅させるならクラス追加 */
    
    .key-pager { background: #fff; font-size: 24px; color: #000; }

    .key-char { background: #333; font-size: 24px; }
    .key-jp-char { font-size: 20px; }

    /* --- 下部タブ --- */
    #tab-bar {
        height: 60px; background: #111; border-top: 1px solid #333;
        display: flex; flex-shrink: 0; z-index: 10;
        padding-bottom: max(env(safe-area-inset-bottom), 0px);
    }
    .tab {
        flex: 1; display: flex; align-items: center; justify-content: center;
        font-size: 14px; font-weight: bold; color: #888;
        border-right: 1px solid #222; flex-direction: column;
        cursor: pointer; background: #222; transition: all 0.2s;
        line-height: 1.1;
    }
    .tab-lbl-main { font-size: 14px; }
    .tab-lbl-sub { font-size: 10px; opacity: 0.8; }
    
    .t-hira.active  { background: var(--tab-hira); color: #fff; }
    .t-kata.active  { background: var(--tab-kata); color: #fff; }
    .t-lower.active { background: var(--tab-lower); color: #fff; }
    .t-upper.active { background: var(--tab-upper); color: #fff; }
    .t-num.active   { background: var(--tab-num); color: #000; }
    .t-sym.active   { background: var(--tab-sym); color: #fff; }
    .t-emoji.active { background: var(--tab-emoji); color: #000; }

</style>
</head>
<body>

<div id="top-area">
    <div id="display-wrapper">
        <div id="line-indicator">
            <div class="ln-num" id="ln-num-text">1</div>
            <div class="ln-label">行目</div>
        </div>
        <div id="input-line" contenteditable="true" inputmode="none" spellcheck="false" 
             oninput="handleInput()" onclick="updateLineNum()"></div>
        
        <div class="side-controls">
            <button class="ctrl-btn btn-ent no-focus-steal" onmousedown="event.preventDefault()" onclick="insertDirect('\n')">↵</button>
            <button class="ctrl-btn no-focus-steal" onmousedown="event.preventDefault()" onclick="moveLine(-1)">▲</button>
            <button class="ctrl-btn btn-full no-focus-steal" onmousedown="event.preventDefault()" onclick="toggleFull()">□</button>
            <button class="ctrl-btn no-focus-steal" onmousedown="event.preventDefault()" onclick="moveLine(1)">▼</button>
        </div>
    </div>
    
    <div id="sub-bar">
        <div id="candidate-bar"></div>
        <div class="sub-tools">
            <button class="sub-btn btn-mov no-focus-steal" onmousedown="event.preventDefault()" onclick="moveLine(-1)">▲</button>
            <button class="sub-btn btn-cpy no-focus-steal" onmousedown="event.preventDefault()" onclick="copyAll()">コピ</button>
            <button class="sub-btn btn-mov no-focus-steal" onmousedown="event.preventDefault()" onclick="moveLine(1)">▼</button>
            <button class="sub-btn btn-pst no-focus-steal" onmousedown="event.preventDefault()" onclick="pasteFromClipboard()">貼付</button>
        </div>
    </div>
</div>

<div id="main-stage">
    <div id="twothumb-board">
        <div id="left-panel"></div>
        <div id="right-panel"></div>
    </div>
</div>

<div id="tab-bar">
    <div class="tab t-hira active" onclick="switchMode('hira', this)"><span class="tab-lbl-main">あ</span><span class="tab-lbl-sub">平仮名</span></div>
    <div class="tab t-kata" onclick="switchMode('kata', this)"><span class="tab-lbl-main">ア</span><span class="tab-lbl-sub">カタカナ</span></div>
    <div class="tab t-lower" onclick="switchMode('lower', this)"><span class="tab-lbl-main">abc</span><span class="tab-lbl-sub">英小</span></div>
    <div class="tab t-upper" onclick="switchMode('upper', this)"><span class="tab-lbl-main">ABC</span><span class="tab-lbl-sub">英大</span></div>
    <div class="tab t-num" onclick="switchMode('num', this)"><span class="tab-lbl-main">数記</span><span class="tab-lbl-sub">半角</span></div>
    <div class="tab t-sym" onclick="switchMode('sym', this)"><span class="tab-lbl-main">数記</span><span class="tab-lbl-sub">全角</span></div>
    <div class="tab t-emoji" onclick="switchMode('emoji', this)"><span class="tab-lbl-main">😀</span><span class="tab-lbl-sub">絵文字</span></div>
</div>

<script>
    // --- データ ---
    const rainbowColors = ['#e60012','#f39800','#ffd900','#99cc00','#009944','#00a0e9','#004098','#4b0082','#800080','#e60033'];

    const jpRows = [
        {id:'a', l:'あ', c:'row-a'}, {id:'k', l:'か', c:'row-k'}, {id:'s', l:'さ', c:'row-s'},
        {id:'t', l:'た', c:'row-t'}, {id:'n', l:'な', c:'row-n'}, {id:'h', l:'は', c:'row-h'},
        {id:'m', l:'ま', c:'row-m'}, {id:'y', l:'や', c:'row-y'}, {id:'r', l:'ら', c:'row-r'},
        {id:'w', l:'わ', c:'row-w'}
    ];
    
    const jpMap = {
        'hira': {
            'a':['あ','ぁ','', 'い','ぃ','', 'う','ぅ','', 'え','ぇ','', 'お','ぉ',''],
            'k':['か','が','', 'き','ぎ','', 'く','ぐ','', 'け','げ','', 'こ','ご',''],
            's':['さ','ざ','', 'し','じ','', 'す','ず','', 'せ','ぜ','', 'そ','ぞ',''],
            't':['た','だ','', 'ち','ぢ','', 'つ','づ','っ', 'て','で','', 'と','ど',''],
            'n':['な','','', 'に','','', 'ぬ','','', 'ね','','', 'の','',''],
            'h':['は','ば','ぱ', 'ひ','び','ぴ', 'ふ','ぶ','ぷ', 'へ','べ','ぺ', 'ほ','ぼ','ぽ'],
            'm':['ま','','', 'み','','', 'む','','', 'め','','', 'も','',''],
            'y':['や','ゃ','', '','','', 'ゆ','ゅ','', '','','', 'よ','ょ',''],
            'r':['ら','','', 'り','','', 'る','','', 'れ','','', 'ろ','',''],
            'w':['わ','ゎ','', 'を','','', 'ん','','', '','','', '','',''],
            'sym':[' ', '\n', '、', '。', '「', '」', '(', ')']
        },
        'kata': {
            'a':['ア','ァ','', 'イ','ィ','', 'ウ','ゥ','', 'エ','ェ','', 'オ','ォ',''],
            'k':['カ','ガ','', 'キ','ギ','', 'ク','グ','', 'ケ','ゲ','', 'コ','ゴ',''],
            's':['サ','ザ','', 'シ','ジ','', 'ス','ズ','', 'セ','ゼ','', 'ソ','ゾ',''],
            't':['タ','ダ','', 'チ','ヂ','', 'ツ','ヅ','ッ', 'テ','デ','', 'ト','ド',''],
            'n':['ナ','','', 'ニ','','', 'ヌ','','', 'ネ','','', 'ノ','',''],
            'h':['ハ','バ','パ', 'ヒ','ビ','ピ', 'フ','ブ','プ', 'ヘ','ベ','ペ', 'ホ','ボ','ポ'],
            'm':['マ','','', 'ミ','','', 'ム','','', 'メ','','', 'モ','',''],
            'y':['ヤ','ャ','', '','','', 'ユ','ュ','', '','','', 'ヨ','ョ',''],
            'r':['ラ','','', 'リ','','', 'ル','','', 'レ','','', 'ロ','',''],
            'w':['ワ','ヮ','', 'ヲ','','', 'ン','','', '','','', '','',''],
            'sym':[' ', '\n', '、', '。', '「', '」', '(', ')']
        }
    };

    const numCategories = [
        {id:'digits', l:'123\n数字', src:"1234567890".split("")},
        {id:'math',   l:'+-*/\n式',   src:"+-*/=<>".split("")},
        {id:'point',  l:'.,:;\n点',   src:".,:;".split("")},
        {id:'bra',    l:'()[]\n括弧', src:"()[]{}''\"\"".split("")},
        {id:'unit',   l:'%$#\n単位',  src:"%$#&@".split("")},
        {id:'other',  l:'^|\n他',     src:"^|~`".split("")}
    ];

    const rawPages = {
        'lower': [ "abcdefghi".split(""), "jklmnopqr".split(""), "stuvwxyz".split(""), ".,!?@_".split("") ],
        'upper': [ "ABCDEFGHI".split(""), "JKLMNOPQR".split(""), "STUVWXYZ".split(""), ".,!?@_".split("") ]
    };
    
    const emojiData = [..."😀😁😂🤣😃😄😅😆😉😊😋😎😍😘🥰😗😙😚🙂🤗🤩🤔🤨😐😑😶🙄😏😣😥😮🤐😯😪😫😴😌😛😜😝🤤😒😓😔😕🙃🤑😲☹️🙁😖😞😟😤😢😭😦😧😨😩🤯😬😰😱🥵🥶😳🤪😵😡😠🤬😷🤒"];

    // --- 状態 ---
    let currentMode = 'hira';
    let currentSelection = 'a';
    let composingText = "";
    
    // DOM
    const inputEl = document.getElementById('input-line');
    const candBar = document.getElementById('candidate-bar');

    // --- 初期化 ---
    switchMode('hira', document.querySelector('.t-hira'));
    inputEl.focus();

    function switchMode(mode, tabEl) {
        currentMode = mode;
        document.querySelectorAll('.tab').forEach(t => t.classList.remove('active'));
        if(tabEl) tabEl.classList.add('active');
        
        const lp = document.getElementById('left-panel');
        const rp = document.getElementById('right-panel');
        lp.className = ""; rp.className = "";

        if (mode !== 'hira' && mode !== 'kata') confirmComposition();

        if (mode === 'hira' || mode === 'kata') {
            lp.classList.add("jp-layout");
            rp.classList.add("jp-layout");
            currentSelection = 'a';
            renderLeftJP();
            renderRightJP();
        } else if (mode === 'num' || mode === 'sym') {
            currentSelection = 0; 
            renderLeftCategories();
            renderRightCategory();
        } else if (mode === 'emoji') {
            currentSelection = 0; 
            renderLeftEmojiNav();
            renderRightEmoji();
        } else {
            currentSelection = 0; 
            renderLeftPages(mode);
            renderRightPage(mode);
        }
    }

    // --- UI レンダリング ---
    function createKey(cls, text, onClick) {
        const div = document.createElement('div');
        div.className = cls + " no-focus-steal";
        div.innerText = text;
        div.onmousedown = (e) => e.preventDefault(); 
        div.onclick = onClick;
        return div;
    }

    function renderLeftJP() {
        const el = document.getElementById('left-panel');
        el.innerHTML = "";
        jpRows.forEach(row => {
            const btn = createKey(`key key-left ${row.c}`, row.l, () => {
                currentSelection = row.id; renderLeftJP(); renderRightJP();
            });
            if(row.id === currentSelection) btn.classList.add('active');
            el.appendChild(btn);
        });
        
        const symBtn = createKey("key key-left row-sym", "記", () => {
            currentSelection = 'sym'; renderLeftJP(); renderRightJP();
        });
        if(currentSelection === 'sym') symBtn.classList.add('active');
        el.appendChild(symBtn);
        
        const delBtn = createKey("key key-left key-del", "削除", deleteChar);
        el.appendChild(delBtn);
    }

    function renderRightJP() {
        const el = document.getElementById('right-panel');
        el.innerHTML = "";
        
        if(currentSelection === 'sym') el.className = 'sym-layout'; else el.className = 'jp-layout';
        
        const map = (currentMode === 'kata') ? jpMap['kata'] : jpMap['hira'];
        const chars = map[currentSelection] || [];
        const activeL = document.querySelector('.key-left.active');
        const bg = activeL ? window.getComputedStyle(activeL).backgroundColor : '#333';
        const fg = activeL ? window.getComputedStyle(activeL).color : '#fff';

        chars.forEach(char => {
            let label = char;
            if(char === ' ') label = '空白';
            if(char === '\n') label = '改行';
            
            const btn = createKey("key key-right key-jp-char", label, () => {
                if (currentSelection === 'sym') insertDirect(char);
                else insertComposing(char);
            });
            
            if(char || char === ' ' || char === '\n') {
                btn.style.backgroundColor = bg;
                btn.style.color = fg;
                btn.style.filter = "brightness(0.9)";
            } else {
                btn.style.background = "transparent";
                btn.style.boxShadow = "none";
                btn.style.border = "none";
                btn.onclick = null;
                btn.classList.remove('key'); // remove hover effect
            }
            el.appendChild(btn);
        });
    }

    function renderLeftPages(mode) {
        const el = document.getElementById('left-panel');
        el.innerHTML = "";
        let srcPages = rawPages[mode] || [];
        srcPages.forEach((_, idx) => {
            const btn = createKey("key key-cat", `p${idx+1}`, () => {
                currentSelection = idx; renderLeftPages(mode); renderRightPage(mode);
            });
            if(idx === currentSelection) btn.classList.add('active');
            el.appendChild(btn);
        });
    }

    function renderRightPage(mode) {
        const el = document.getElementById('right-panel');
        el.innerHTML = "";
        const pages = rawPages[mode];
        const items = pages[currentSelection] || [];
        
        let alphaStart = 0;
        for(let i=0; i<currentSelection; i++) alphaStart += pages[i].length;
        let alphaCounter = alphaStart;

        items.forEach(char => {
            const btn = createKey("key key-char", char, () => insertDirect(char));
            
            const cIdx = Math.floor(alphaCounter / 3) % rainbowColors.length;
            const color = rainbowColors[cIdx];
            btn.style.backgroundColor = color;
            if(['#ffd900', '#99cc00', '#f39800', '#40e0d0'].includes(color)) {
                btn.style.color = "#000";
            }
            alphaCounter++;
            el.appendChild(btn);
        });
    }

    function renderLeftCategories() {
        const el = document.getElementById('left-panel');
        el.innerHTML = "";
        numCategories.forEach((cat, idx) => {
            const btn = createKey("key key-cat", cat.l, () => {
                currentSelection = idx; renderLeftCategories(); renderRightCategory();
            });
            if(idx === currentSelection) btn.classList.add('active');
            el.appendChild(btn);
        });
    }

    function renderRightCategory() {
        const el = document.getElementById('right-panel');
        el.innerHTML = "";
        const cat = numCategories[currentSelection];
        const chars = cat.src;
        
        chars.forEach(char => {
            let val = char;
            let display = char;
            if (currentMode === 'sym') {
                val = toFullWidth(char);
                display = val;
            }
            const btn = createKey("key key-char", display, () => insertDirect(val));
            btn.style.backgroundColor = "#d1f5fd";
            btn.style.color = "#000";
            btn.style.textShadow = "none";
            el.appendChild(btn);
        });
    }

    function renderLeftEmojiNav() {
        const el = document.getElementById('left-panel');
        el.innerHTML = "";
        const up = createKey("key key-pager", "▲", () => {
            if(currentSelection > 0) { currentSelection--; renderRightEmoji(); }
        });
        const down = createKey("key key-pager", "▼", () => {
             const maxPage = Math.ceil(emojiData.length / 12) - 1;
             if(currentSelection < maxPage) { currentSelection++; renderRightEmoji(); }
        });
        el.appendChild(up); el.appendChild(down);
    }
    
    function renderRightEmoji() {
        const el = document.getElementById('right-panel');
        el.innerHTML = "";
        const start = currentSelection * 12;
        const items = emojiData.slice(start, start+12);
        items.forEach(char => {
            const btn = createKey("key key-char font-emoji", char, () => insertDirect(char));
            btn.style.fontSize = "24px";
            btn.style.backgroundColor = "#ffffff";
            btn.style.color = "#000";
            btn.style.textShadow = "none";
            el.appendChild(btn);
        });
    }

    // --- Logic ---
    function insertComposing(char) {
        composingText += char;
        updateComposingDisplay();
        updateCandidates();
    }
    
    function updateComposingDisplay() {
        let span = inputEl.querySelector('.composing-span');
        if (!span) {
            span = document.createElement('span');
            span.className = 'composing-span';
            insertNodeAtCursor(span);
        }
        span.innerText = composingText;
        placeCaretAfter(span); 
        const range = document.createRange();
        range.selectNodeContents(span);
        range.collapse(false);
        const sel = window.getSelection();
        sel.removeAllRanges();
        sel.addRange(range);
        updateLineNum();
    }

    function confirmComposition(textToCommit) {
        if (textToCommit !== undefined) composingText = textToCommit;
        if (!composingText) return;

        let span = inputEl.querySelector('.composing-span');
        if (span) {
            const textNode = document.createTextNode(composingText);
            span.parentNode.replaceChild(textNode, span);
            placeCaretAfter(textNode);
        } else {
            insertDirect(composingText);
        }
        composingText = "";
        candBar.innerHTML = '';
        updateLineNum();
    }

    function insertDirect(text) {
        if (composingText) confirmComposition();
        document.execCommand('insertText', false, text);
        updateLineNum();
    }

    function deleteChar() {
        if (composingText) {
            composingText = composingText.slice(0, -1);
            if (!composingText) {
                let span = inputEl.querySelector('.composing-span');
                if(span) span.remove();
                candBar.innerHTML = '';
            } else {
                updateComposingDisplay();
                updateCandidates();
            }
        } else {
            document.execCommand('delete');
        }
        updateLineNum();
    }

    function insertNodeAtCursor(node) {
        inputEl.focus();
        const sel = window.getSelection();
        if (sel.rangeCount > 0) {
            const range = sel.getRangeAt(0);
            range.deleteContents();
            range.insertNode(node);
        } else {
            inputEl.appendChild(node);
        }
    }

    function placeCaretAfter(node) {
        const range = document.createRange();
        range.setStartAfter(node);
        range.collapse(true);
        const sel = window.getSelection();
        sel.removeAllRanges();
        sel.addRange(range);
    }

    function updateCandidates() {
        candBar.innerHTML = "";
        if (!composingText) return;
        const list = [composingText];
        if (currentMode === 'hira') {
            list.push(composingText.replace(/[\u3041-\u3096]/g, c => String.fromCharCode(c.charCodeAt(0) + 0x60)));
        }
        list.forEach(c => {
            const chip = document.createElement('div');
            chip.className = 'cand-chip no-focus-steal';
            chip.innerText = c;
            chip.onmousedown = (e) => e.preventDefault();
            chip.onclick = () => confirmComposition(c);
            candBar.appendChild(chip);
        });
    }

    function toFullWidth(str) {
        return str.replace(/[!-~]/g, function(s) {
            return String.fromCharCode(s.charCodeAt(0) + 0xFEE0);
        }).replace(/ /g, "\u3000");
    }

    function updateLineNum() {
        const text = inputEl.innerText;
        const lines = text.split(/\n/).length;
        document.getElementById('ln-num-text').innerText = lines;
    }
    
    function handleInput() { updateLineNum(); }

    function copyAll() { navigator.clipboard.writeText(inputEl.innerText).then(()=>alert("コピーしました")); }
    async function pasteFromClipboard() {
        try { const text = await navigator.clipboard.readText(); insertDirect(text); } catch(e) {}
    }
    function toggleFull() { document.getElementById('top-area').classList.toggle('fullscreen'); }
    function moveLine(d) { inputEl.scrollTop += d * 30; }

</script>
</body>
</html>

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スマホの入力を簡単にする?「Two Same Input」|古井和雄
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