simple-pad/index.html at master · stoneapptech/simple-pad · GitHub

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<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="preconnect" href="https://fonts.googleapis.com">
    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
    <link href="https://fonts.googleapis.com/css2?family=Noto+Sans+TC&display=swap" rel="stylesheet">
    <title>Simple Pad</title>
    <style>
        * {
            box-sizing: border-box;
        }

        html, body {
            height: 100%;
            width: 100%;
            margin: 0;
            padding: 0;
            font-family: Noto Sans TC, sans-serif;
        }

        .container {
            width: 100%;
            height: 100%;
            padding: 0;
            margin: auto;
            display: flex;
            justify-content: center;
            align-items: center;
            flex-direction: column;
        }

        #pad {
            flex: 1;
            flex-grow: 1;
            width: 100%;
            overflow: auto;
            outline: none;
            padding: 1em;
            border: 3px solid #c3c3c3;
        }

        #status {
            width: 100%;
            padding: .25rem;
            display: grid;
            grid-template-columns: 150px 1fr minmax(min-content, 100px);
            background-color: #e3e3e3;
        }

        #filename {
            grid-column: 1;
        }

        #counter {
            grid-column: 3;
            white-space: pre;
            text-align: end;
        }
    </style>
</head>
<body>
    <div class="container">
        <div id="pad" contenteditable="true"></div>
        <div id="status">
            <input id="filename" type="text" placeholder="pad.txt">
            <div id="counter"></div>
        </div>
    </div>
    <script>
        const $ = (selector) => { return document.querySelector(selector); }

        function downloadFile(fileName, fileContent, fileType) {
            function createBlobUrl() {
                return URL.createObjectURL(new Blob([fileContent], { type: fileType }));
            }

            let downloadElement = document.createElement("a");
            let url = createBlobUrl();

            downloadElement.download = fileName;
            downloadElement.href = url;
            downloadElement.style = 'position: absolute; top: 0; right: 0; left: 0; bottom: 0; visibility: hidden;';

            document.body.appendChild(downloadElement);

            downloadElement.click();

            document.body.removeChild(downloadElement);
            URL.revokeObjectURL(url);
        }

        function updateCounter() {
            $("#counter").textContent = `length: ${$("#pad").innerText.length}`;
        }

        $("#pad").addEventListener("input", function(e) {
            let el = e.target;
            if (el.innerText) localStorage.setItem("pad_content", el.innerText);
            else localStorage.removeItem("pad_content");
            updateCounter();
        });

        if (localStorage.getItem("pad_content")) {
            $("#pad").innerText = localStorage.getItem("pad_content");
        }

        updateCounter();

        document.body.addEventListener("keydown", (ev) => {
            // Ctrl + S => save file
            if (ev.ctrlKey && ev.key == "s") {
                ev.preventDefault();

                downloadFile($("#filename").value || "pad.txt", $("#pad").innerText, "text/plain");
            }
        });
    </script>
</body>
</html>