move codemirror extensions into their own folder

client/components/codeEditor/extensions/legacyCustomHighlight.js

@@ -0,0 +1,54 @@
+import { HighlightStyle } from '@codemirror/language';
+import { tags } from '@lezer/highlight';
+
+const customTags = {
+	pageLine    : 'pageLine', // .cm-pageLine
+	snippetLine : 'snippetLine', // .cm-snippetLine
+};
+
+export function legacyTokenizeCustomMarkdown(text) {
+	const tokens = [];
+	const lines = text.split('\n');
+
+	lines.forEach((lineText, lineNumber)=>{
+		// --- Page / snippet lines ---
+		if(/^(?=\\page(?:break)?(?: *{[^\n{}]*})?$)/m.test(lineText)) tokens.push({ line: lineNumber, type: customTags.pageLine });
+		if(/^\\snippet\ .*$/.test(lineText)) tokens.push({ line: lineNumber, type: customTags.snippetLine });
+	});
+
+	return tokens;
+}
+
+export const legacyCustomHighlightStyle = HighlightStyle.define([
+	{ tag: tags.heading,  class: 'cm-header' },
+	{ tag: tags.heading1,  class: 'cm-header cm-header-1' },
+	{ tag: tags.heading2,  class: 'cm-header cm-header-2' },
+	{ tag: tags.heading3,  class: 'cm-header cm-header-3' },
+	{ tag: tags.heading4,  class: 'cm-header cm-header-4' },
+	{ tag: tags.heading5,  class: 'cm-header cm-header-5' },
+	{ tag: tags.heading6,  class: 'cm-header cm-header-6' },
+	{ tag: tags.link,  class: 'cm-link' },
+	{ tag: tags.string,  class: 'cm-string' },
+	{ tag: tags.url,  class: 'cm-string cm-url' },
+	{ tag: tags.list,  class: 'cm-list' },
+	{ tag: tags.strong,  class: 'cm-strong' },
+	{ tag: tags.emphasis,  class: 'cm-em' },
+	{ tag: tags.quote,  class: 'cm-quote' },
+
+	//css tags
+
+	{ tag: tags.tagName,  class: 'cm-tag' },
+	{ tag: tags.className,  class: 'cm-class' },
+	{ tag: tags.propertyName,  class: 'cm-property' },
+	{ tag: tags.attributeValue,  class: 'cm-value' },
+	{ tag: tags.keyword,  class: 'cm-keyword' },
+	{ tag: tags.atom,  class: 'cm-atom' },
+	{ tag: tags.integer,  class: 'cm-integer' },
+	{ tag: tags.unit,  class: 'cm-unit' },
+	{ tag: tags.color,  class: 'cm-color' },
+	{ tag: tags.paren,  class: 'cm-paren' },
+	{ tag: tags.variableName,  class: 'cm-variable' },
+	{ tag: tags.invalid,  class: 'cm-error' },
+	{ tag: tags.comment,  class: 'cm-comment' },
+]);
+