Merge pull request 'Improved paste handling to support selection and providing undo support' (#74) from BordedDev/snek:feature/even-better-paste-handling into main

Reviewed-on: retoor/snek#74

src/snek/templates/web.html

@@ -1,6 +1,6 @@
 {% extends "app.html" %}
 
-{% block header_text %}<h2 style="color:#fff">{{ name }}</h2>{% endblock %} 
+{% block header_text %}<h2 style="color:#fff">{{ name }}</h2>{% endblock %}
 
 {% block main %}
 {% include "channel.html" %}
@@ -8,11 +8,11 @@
     <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/xterm/css/xterm.css">
     <script src="https://cdn.jsdelivr.net/npm/xterm/lib/xterm.js"></script>
     <script src="https://cdn.jsdelivr.net/npm/xterm-addon-fit/lib/xterm-addon-fit.js"></script>
-    
+
     <div id="terminal" class="hidden"></div>
         <message-list class="chat-messages">
         {% if not messages %}
-        
+
         <div>
           <h1>Welcome to your new channel!</h1>
           <p>This is the start of something great. Use the commands below to get started:</p>
@@ -37,10 +37,9 @@
 {% include "dialog_help.html" %}
 {% include "dialog_online.html" %}
 <script type="module">
-    import { app } from "/app.js";
-import { Schedule } from "/schedule.js";
+    import {app} from "/app.js";
 
-// --- Cache selectors ---
+    // --- Cache selectors ---
 const chatInputField = document.querySelector("chat-input");
 const messagesContainer = document.querySelector(".chat-messages");
 const chatArea = document.querySelector(".chat-area");
@@ -52,7 +51,7 @@ chatInputField.autoCompletions = {
     "/clear": () => { messagesContainer.innerHTML = ''; },
     "/live": () => { chatInputField.liveType = !chatInputField.liveType; },
     "/help": showHelp,
-    "/container": async() =>{ 
+    "/container": async() =>{
         containerDialog.openWithStatus()
     }
 };
@@ -99,21 +98,61 @@ setInterval(() => requestIdleCallback(updateTimes), 30000);
 
 // --- Paste & drag/drop uploads ---
 const textBox = chatInputField.textarea;
-textBox.addEventListener("paste", async (e) => {
-    try {
-        const clipboardItems = await navigator.clipboard.read();
-        const dt = new DataTransfer();
-        for (const item of clipboardItems) {
-            for (const type of item.types.filter(t => !t.startsWith('text/'))) {
-                const blob = await item.getType(type);
-                dt.items.add(new File([blob], "image.png", { type }));
+
+function uploadDataTransfer(dt) {
+    if (dt.items.length > 0) {
+        const uploadButton = chatInputField.fileUploadGrid;
+
+        for (const item of dt.items) {
+            if (item.kind === "file") {
+                const file = item.getAsFile();
+                if (file) {
+                   uploadButton.uploadsStarted++
+                   uploadButton.createTile(file)
+                } else {
+                    console.error("Failed to get file from DataTransferItem");
+                }
             }
         }
-        if (dt.items.length > 0) {
-            const uploadButton = chatInputField.uploadButton;
-            const input = uploadButton.shadowRoot.querySelector('.file-input');
-            input.files = dt.files;
-            await uploadButton.uploadFiles();
+    }
+}
+textBox.addEventListener("paste", async (e) => {
+    try {
+        console.log("Pasted data:", e.clipboardData);
+        if (e.clipboardData.types.every(v => v.startsWith("text/"))) {
+            const codeType = e.clipboardData.types.find(t => !t.startsWith('text/plain') && !t.startsWith('text/html') && !t.startsWith('text/rtf'));
+            const probablyCode = codeType ||e.clipboardData.types.some(t => !t.startsWith('text/plain'));
+            for (const item of e.clipboardData.items) {
+                if (item.kind === "string" && item.type === "text/plain") {
+                    e.preventDefault();
+                    item.getAsString(text => {
+                        const value = chatInputField.value;
+                        if (probablyCode) {
+                            let code = text;
+                            const minIndentDepth = code.split('\n').reduce((acc, line) => {
+                                if (!line.trim()) return acc;
+                                const match = line.match(/^(\s*)/);
+                                return match ? Math.min(acc, match[1].length) : acc;
+                            }, 9000);
+                            code = code.split('\n').map(line => line.slice(minIndentDepth)).join('\n')
+                            text = `\`\`\`${codeType?.split('/')?.[1] ?? ''}\n${code}\n\`\`\`\n`;
+                        }
+                        const area = chatInputField.textarea
+                        if(area){
+                            const start = area.selectionStart
+
+                            if ("\n" !== value[start - 1]) {
+                                text = `\n${text}`;
+                            }
+
+                            document.execCommand('insertText', false, text);
+                        }
+                    });
+                    break;
+                }
+            }
+        } else {
+            uploadDataTransfer(e.clipboardData);
         }
     } catch (error) {
         console.error("Failed to read clipboard contents: ", error);
@@ -121,13 +160,7 @@ textBox.addEventListener("paste", async (e) => {
 });
 chatArea.addEventListener("drop", async (e) => {
     e.preventDefault();
-    const dt = e.dataTransfer;
-    if (dt.items.length > 0) {
-        const uploadButton = chatInputField.uploadButton;
-        const input = uploadButton.shadowRoot.querySelector('.file-input');
-        input.files = dt.files;
-        await uploadButton.uploadFiles();
-    }
+    uploadDataTransfer(e.dataTransfer);
 });
 chatArea.addEventListener("dragover", e => {
     e.preventDefault();
@@ -180,7 +213,7 @@ app.ws.addEventListener("starfield.render_word", (data) => {
 
 // --- Channel message event ---
 app.addEventListener("channel-message", (data) => {
-    
+
     let display = data.text && data.text.trim() ? 'block' : 'none';
 
     if (data.channel_uid !== channelUid) {
@@ -221,7 +254,7 @@ document.addEventListener('keydown', function(event) {
         clearTimeout(keyTimeout);
         keyTimeout = setTimeout(() => { gPressCount = 0; }, 300);
         if (gPressCount === 2) {
-            gPressCount = 0; 
+            gPressCount = 0;
             messagesContainer.lastElementChild?.scrollIntoView({ block: "end", inline: "nearest" });
             loadExtra();
         }