1 files changed, 44 insertions, 0 deletions

diff --git a/src/new_fields/RichTextField.ts b/src/new_fields/RichTextField.ts
index 89799b2af..cae5623e6 100644
--- a/src/new_fields/RichTextField.ts
+++ b/src/new_fields/RichTextField.ts
@@ -4,6 +4,11 @@ import { Deserializable } from "../client/util/SerializationHelper";
 import { Copy, ToScriptString } from "./FieldSymbols";
 import { scriptingGlobal } from "../client/util/Scripting";
 
+export const ToPlainText = Symbol("PlainText");
+export const FromPlainText = Symbol("PlainText");
+const delimiter = "\n";
+const joiner = "";
+
 @scriptingGlobal
 @Deserializable("RichTextField")
 export class RichTextField extends ObjectField {
@@ -22,4 +27,43 @@ export class RichTextField extends ObjectField {
     [ToScriptString]() {
         return `new RichTextField("${this.Data}")`;
     }
+
+    [ToPlainText]() {
+        // Because we're working with plain text, just concatenate all paragraphs
+        let content = JSON.parse(this.Data).doc.content;
+        let paragraphs = content.filter((item: any) => item.type === "paragraph");
+
+        // Functions to flatten ProseMirror paragraph objects (and their components) to plain text
+        // While this function already exists in state.doc.textBeteen(), it doesn't account for newlines 
+        let blockText = (block: any) => block.text;
+        let concatenateParagraph = (p: any) => (p.content ? p.content.map(blockText).join(joiner) : "") + delimiter;
+
+        // Concatentate paragraphs and string the result together
+        let textParagraphs: string[] = paragraphs.map(concatenateParagraph);
+        let plainText = textParagraphs.join(joiner);
+        return plainText.substring(0, plainText.length - 1);
+    }
+
+    [FromPlainText](plainText: string) {
+        // Remap the text, creating blocks split on newlines
+        let elements = plainText.split(delimiter);
+
+        // Google Docs adds in an extra carriage return automatically, so this counteracts it
+        !elements[elements.length - 1].length && elements.pop();
+
+        // Preserve the current state, but re-write the content to be the blocks
+        let parsed = JSON.parse(this.Data);
+        parsed.doc.content = elements.map(text => {
+            let paragraph: any = { type: "paragraph" };
+            text.length && (paragraph.content = [{ type: "text", marks: [], text }]); // An empty paragraph gets treated as a line break
+            return paragraph;
+        });
+
+        // If the new content is shorter than the previous content and selection is unchanged, may throw an out of bounds exception, so we reset it
+        parsed.selection = { type: "text", anchor: 1, head: 1 };
+
+        // Export the ProseMirror-compatible state object we've jsut built
+        return JSON.stringify(parsed);
+    }
+
 }
\ No newline at end of file