From ab4c953d8258e9f857cc945d7b0a59082051b623 Mon Sep 17 00:00:00 2001
From: Vinoth Kannan <vinoth.kannan@discourse.org>
Date: Mon, 4 Dec 2017 20:53:42 +0530
Subject: [PATCH] FEATURE: Paste plain text table as Markdown table

---
 .../components/composer-editor.js.es6         |  4 +-
 .../discourse/components/d-editor.js.es6      | 39 +++++++++++++++++--
 .../discourse/lib/utilities.js.es6            | 10 ++---
 3 files changed, 42 insertions(+), 11 deletions(-)

diff --git a/app/assets/javascripts/discourse/components/composer-editor.js.es6 b/app/assets/javascripts/discourse/components/composer-editor.js.es6
index 39835269769..065a92db77e 100644
--- a/app/assets/javascripts/discourse/components/composer-editor.js.es6
+++ b/app/assets/javascripts/discourse/components/composer-editor.js.es6
@@ -396,10 +396,10 @@ export default Ember.Component.extend({
     });
 
     $element.on('fileuploadpaste', (e) => {
-      let {types} = clipboardData(e);
+      const clipboard = clipboardData(e);
       this._pasted = true;
 
-      if (types.some(t => t === "text/plain")) {
+      if (clipboard.types.some(t => t === "text/plain")) {
         e.preventDefault();
       }
     });
diff --git a/app/assets/javascripts/discourse/components/d-editor.js.es6 b/app/assets/javascripts/discourse/components/d-editor.js.es6
index b46c934568d..1d29e8b3c91 100644
--- a/app/assets/javascripts/discourse/components/d-editor.js.es6
+++ b/app/assets/javascripts/discourse/components/d-editor.js.es6
@@ -616,10 +616,43 @@ export default Ember.Component.extend({
     Ember.run.scheduleOnce("afterRender", () => $textarea.focus());
   },
 
-  paste(e) {
-    let {types} = clipboardData(e);
+  _detectTable(text) {
+    if (text.endsWith("\n")) {
+      text = text.substring(0, text.length - 1);
+      let rows = text.split("\r").join("").split("\n");
 
-    if (types.some(t => t === "Files") && !types.some(t => t === "text/plain")) {
+      if (rows.length > 1) {
+        const columns = rows.map(r => r.split("\t").length);
+        const isTable = columns.reduce((a, b) => a && columns[0] === b && b > 1);
+
+        if (isTable) {
+          const splitterRow = [...Array(columns[0])].map(c => "---").join("\t");
+          rows.splice(1, 0, splitterRow);
+
+          return "|" + rows.map(r => r.split("\t").join("|")).join("|\n|") + "|\n";
+        }
+      }
+    }
+    return null;
+  },
+
+  paste(e) {
+    const clipboard = clipboardData(e);
+    const types = clipboard.types;
+    let preventDefault = false;
+
+    if (types.some(t => t === "text/plain")) {
+      const text = clipboard.getData("text/plain");
+      const table = this._detectTable(text);
+      if (table) {
+        this._addText(this._getSelected(), table);
+        preventDefault = true;
+      }
+    } else if (types.some(t => t === "Files")) {
+      preventDefault = true;
+    }
+
+    if (preventDefault) {
       e.preventDefault();
     }
   },
diff --git a/app/assets/javascripts/discourse/lib/utilities.js.es6 b/app/assets/javascripts/discourse/lib/utilities.js.es6
index 625b68c68e7..7a460cd0ae3 100644
--- a/app/assets/javascripts/discourse/lib/utilities.js.es6
+++ b/app/assets/javascripts/discourse/lib/utilities.js.es6
@@ -422,12 +422,10 @@ export function isAppleDevice() {
 }
 
 export function clipboardData(e) {
-  let data = e.clipboardData ||
-                e.originalEvent.clipboardData ||
-                e.delegatedEvent.originalEvent.clipboardData ||
-                event.clipboardData;
-
-  return { items: data.items, types: data.types };
+  return  e.clipboardData ||
+            e.originalEvent.clipboardData ||
+            e.delegatedEvent.originalEvent.clipboardData ||
+            event.clipboardData;
 }
 
 // This prevents a mini racer crash