From cc9edcc67c018f05ada60d5273a72f9f26c2c4d3 Mon Sep 17 00:00:00 2001
From: "G.Ambatte" <sean@robertson-family.nz>
Date: Sat, 17 Aug 2024 23:11:04 +1200
Subject: [PATCH] Prevent styling of lines inside folded sections

---
 client/homebrew/editor/editor.jsx | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/client/homebrew/editor/editor.jsx b/client/homebrew/editor/editor.jsx
index 1ecdcb22b..4a38fc523 100644
--- a/client/homebrew/editor/editor.jsx
+++ b/client/homebrew/editor/editor.jsx
@@ -119,8 +119,17 @@ const Editor = createClass({
 			const codeMirror = this.codeEditor.current.codeMirror;
 
 			codeMirror.operation(()=>{ // Batch CodeMirror styling
+				const foldLines = [];
 				//reset custom text styles
-				const customHighlights = codeMirror.getAllMarks().filter((mark)=>!mark.__isFold); //Don't undo code folding
+				const customHighlights = codeMirror.getAllMarks().filter((mark)=>{
+					// Record details of folded sections
+					if(mark.__isFold) {
+						const fold = mark.find();
+						foldLines.push({from: fold.from?.line, to: fold.to?.line});
+					}
+					return !mark.__isFold;
+				}); //Don't undo code folding
+
 				for (let i=customHighlights.length - 1;i>=0;i--) customHighlights[i].clear();
 
 				let editorPageCount = 2; // start page count from page 2
@@ -132,6 +141,14 @@ const Editor = createClass({
 					codeMirror.removeLineClass(lineNumber, 'text');
 					codeMirror.removeLineClass(lineNumber, 'wrap', 'sourceMoveFlash');
 
+					// Don't process lines inside folded text
+					// If the current lineNumber is inside any folded marks, skip line styling
+					if(_.filter(foldLines, (fold)=>{
+						return lineNumber >= fold.from && lineNumber <= fold.to;
+					 }).length > 0) {
+						return;
+					 };
+
 					// Styling for \page breaks
 					if((this.props.renderer == 'legacy' && line.includes('\\page')) ||
 				     (this.props.renderer == 'V3'     && line.match(/^\\page$/))) {