Create index.html

eyaler · Jun 23, 2024 · 35e6db5 · 35e6db5
1 parent 59322b4
commit 35e6db5
Showing 1 changed file with 78 additions and 0 deletions.
diff --git a/index.html b/index.html
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+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <title>PAD</title>
+  <script src="https://cdn.jsdelivr.net/npm/gun/gun.min.js"></script>
+  <!-- Uncomment to use Radisk/IndexedDB instead of localStorage:
+    <script src="https://cdn.jsdelivr.net/npm/gun/lib/radix.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/gun/lib/radisk.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/gun/lib/store.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/gun/lib/rindexed.min.js"></script>
+  -->
+  <style>
+    textarea {
+      border: none;
+      font-size: 1rem;
+      inset: 0;
+      margin: 0;
+      outline: none;
+      padding: 1rem;
+      position: absolute;
+      resize: none;
+    }
+
+    textarea:read-only {
+      background-color: rgba(255, 0, 0, .15);
+    }
+  </style>
+</head>
+<body>
+  <textarea id="textarea" dir="auto" placeholder="Type here."></textarea>
+  <script>
+    const peers = ['https://gun-manhattan.herokuapp.com/gun', 'https://try.axe.eco/gun', 'https://test.era.eco/gun']
+    const gun = Gun(peers)
+    const pad = gun.get(location.hash.slice(1) || 'default')
+    if (!navigator.onLine)
+      textarea.readOnly = true
+    addEventListener('offline', () => textarea.readOnly = true)
+    addEventListener('online', () => {
+      gun.opt(peers)
+      pad.get('heartbeat').put('heartbeat')
+      textarea.removeAttribute('readonly')
+    })
+    textarea.addEventListener('input', () => pad.put({content: textarea.value}))
+    pad.on(data => {
+      const text = textarea.value
+      const new_text = data.content
+      if (new_text != text) {
+        const start = textarea.selectionStart
+        const end = textarea.selectionEnd
+        textarea.value = new_text
+        const delta = new_text.length - text.length
+        if (start < text.length && text.slice(start) == new_text.slice(start + delta))
+          textarea.setSelectionRange(start + delta, end + delta)
+        else if (text.slice(0, end) == new_text.slice(0, end))
+          textarea.setSelectionRange(start, end)
+        else if (end > start)
+          if (text.slice(0, start) == new_text.slice(0, start)) {
+            if (text.slice(end) == new_text.slice(end + delta))
+              textarea.setSelectionRange(start, end + delta)
+            else {
+              let i = start
+              while (text[i] == new_text[i])
+                i++
+              textarea.setSelectionRange(start, i)
+            }
+          } else if (text.slice(end) == new_text.slice(end + delta)) {
+            let i = end
+            while (text[i - 1] == new_text[i - 1 + delta])
+              i--
+            textarea.setSelectionRange(i + delta, end + delta)
+          }
+      }
+    })
+  </script>
+</body>
+</html>