Support Nerd Font glyps in prompt parser

Author: Scriptim

src/lib/enum/nerdfontglyph.ts

@@ -43084,6 +43084,27 @@ export function findNerdFontGlyphByName(name: string): NerdFontGlyph | undefined
   return NERD_FONT_GLYPHS.find((glyph) => glyph.name.toLowerCase() === name.toLowerCase());
 }
 
+const codeRange = NERD_FONT_GLYPHS.reduce(
+  (range, glyph) => ({
+    min: Math.min(range.min, glyph.code),
+    max: Math.max(range.max, glyph.code),
+  }),
+  { min: Infinity, max: -Infinity },
+);
+
+/**
+ * Find a Nerd Font glyph by its code point.
+ *
+ * @param code The code point of the glyph.
+ * @returns The glyph with the given code point or `undefined` if no such glyph exists.
+ */
+export function findNerdFontGlyphByCode(code: number): NerdFontGlyph | undefined {
+  if (code < codeRange.min || code > codeRange.max) {
+    return undefined;
+  }
+  return NERD_FONT_GLYPHS.find((glyph) => glyph.code === code);
+}
+
 const fuse = new Fuse(NERD_FONT_GLYPHS, {
   keys: ['name'],
 });

src/lib/promptParser.ts

@@ -3,6 +3,7 @@ import { ANSI } from './enum/ansi';
 import { PromptElement } from './promptElement';
 import { PropertiesState, defaultPropertiesState } from './promptElementProperties';
 import { COLORS } from './enum/color';
+import { findNerdFontGlyphByCode } from './enum/nerdfontglyph';
 
 /**
  * Thrown when the prompt parser encounters an error.
@@ -370,6 +371,9 @@ export function parsePrompt(ps1: string, promptCommand: string): PromptElement[]
   let operatingSystemCommand: boolean = false;
 
   while (cursor < ps1.length) {
+    // we need to segment graphemes to handle Nerd Font glyphs consisting of multiple code units correctly
+    const grapheme = new Intl.Segmenter().segment(ps1.slice(cursor))[Symbol.iterator]().next().value?.segment ?? '';
+
     // unparameterized elements are the most common, so we check them first
     const unparameterizedElement = readUnparameterized(ps1, cursor);
     if (unparameterizedElement !== null) {
@@ -507,6 +511,14 @@ export function parsePrompt(ps1: string, promptCommand: string): PromptElement[]
 
       elements.push(applyState(element, propertiesState));
     }
+    // manual handling of Nerd Font glyphs
+    else if (findNerdFontGlyphByCode(grapheme.codePointAt(0) ?? 0) !== undefined) {
+      const glyph = findNerdFontGlyphByCode(grapheme.codePointAt(0) ?? 0)!;
+      const element = new PromptElement(getPromptElementTypeByNameUnsafe('Nerd Font Glyph'));
+      element.parameters.glyph = glyph.name;
+      elements.push(applyState(element, propertiesState));
+      cursor += grapheme.length;
+    }
     // manual handling of custom text element (fallback)
     else {
       // we create text elements with single characters only because the next char might be a special character