scratchpad/scratch.html at main · davidatwell/scratchpad · GitHub

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<html>
    <head>
        <style>
            .pad{
                font-family:Conosolas, Monaco, monospace;
                font-size:18px;
                padding:18px;
                border:2px solid #eeee00;
            }
            #padSelect{
                margin:2px 0 10px 0;
            }
        </style>
        <title>Scratch Pad</title>
    </head>
<body>
    <select id="padselect">
        <option selected disabled id="loading">Loading...</option>
    </select>
    <button id="addPad">+</button>
    <button id="deletePad">-</button>
    <div class="pad" id="scratch" contenteditable>
    </div>
</body>
<script>
    let settings = {};
    let pageElements = {};

    function initialize(){
        if(!sniff()){
            alert("HTML5 LocalStorage disabled or not available on your browser.");
            return false;
        };

        setupLocalStorage();
        getPageElements();
        getSettings();
        getAllPads();
        if(settings.selected){loadPad(settings.selected);}
    };

    function sniff(){
        try {
            localStorage.setItem("sniff","sniff");
            localStorage.removeItem("sniff","sniff");
            return true;
        } catch (e) {
            return false;
        }
    };

    function setupLocalStorage(){
        let lskeys = Object.keys(localStorage);

        if(lskeys.includes('input-body')
            && !lskeys.includes('settings')
            && !lskeys.includes('Base')){ //migrate from legacy
                localStorage.setItem('settings','');
                localStorage.setItem('Base',localStorage.getItem('input-body'));
                localStorage.removeItem('input-body');
        } else {
            if(!lskeys.includes('settings')){saveSettings();}
            if(!lskeys.includes('Base')){localStorage.setItem('Base','');}
        }
    };

    function getPageElements(){
        pageElements.selectBox = document.getElementById('padselect');
        pageElements.inputBox = document.getElementById('scratch');
        pageElements.addButton = document.getElementById('addPad');
        pageElements.deleteButton = document.getElementById('deletePad');

        return pageElements;
    };

    function getAllPads(){
        let lskeys = Object.keys(localStorage);

        lskeys.forEach(function(key){
            if(key != 'settings'){
                createOption(key);
            }
        });

        pageElements.selectBox.removeChild(document.getElementById('loading'));
        pageElements.selectBox.addEventListener('change', onPadChange);
        pageElements.addButton.addEventListener('click', addPad);
        pageElements.deleteButton.addEventListener('click', deletePad);
    };

    function createOption(key){
        var opt = document.createElement('option');
            if(settings.selected && settings.selected == key){
                opt.selected = "selected";
            }
            opt.value = key;
            opt.innerHTML = key;
            opt.id = "select-" + key;
        pageElements.selectBox.appendChild(opt);
    };

    function removeOption(key){
    };

    function onPadChange(){
        settings.selected = pageElements.selectBox.value;
        saveSettings();
        loadPad(settings.selected);
    };

    function addPad(){
        let name = prompt("Enter pad name:");

        if(name){
            savePad(name, "");
            createOption(name);
            pageElements.selectBox.value = name;
            onPadChange();
        }
    };

    function deletePad(){
        if(confirm("Really delete this pad?")){
            localStorage.removeItem(settings.selected);
            pageElements.selectBox.removeChild(document.getElementById('select-'+ settings.selected));
            pageElements.selectBox.value = 'Base';;
            onPadChange();
        }
    };

    function loadPad(pad) {
        pageElements.inputBox.innerText = localStorage.getItem(pad);

        pageElements.inputBox.addEventListener('input', function () {
            savePad(settings.selected, pageElements.inputBox.innerText);
        });
    };

    function persistInput(pad) {
        let storedValue = localStorage.getItem(pad);
        if (storedValue){
            pageElements.inputBox.innerText = storedValue;
        }
        pageElements.inputBox.addEventListener('input', function () {
            localStorage.setItem(key, input.innerText);
            });
    };

    function saveSettings(){
        localStorage.setItem('settings',JSON.stringify(settings));
    };

    function getSettings(){
        var settings = {};
        var settingsString = localStorage.getItem('settings'));
        if(settingsString.length) > 0 {
            settings = JSON.parse(localStorage.getItem('settings'));
        }
        return settings;
    };

    function savePad(pad, text){
        localStorage.setItem(pad, text);
    };

    function getPad(pad){
        localStorage.getItem('pad');
    };

    initialize();
</script>
</html>