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Fix/mermaid multiline label error #6

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Merged
DucPhamNgoc08 merged 2 commits into from
Nov 15, 2025
+10 −8
Merged

Fix/mermaid multiline label error #6

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94055c0
git commit -m "fix(StringProcessor): normalize whitespace in multi-li…
DucPhamNgoc08 Nov 15, 2025
22c7e87
update StringProcessor.ts
DucPhamNgoc08 Nov 15, 2025
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18 changes: 10 additions & 8 deletions src/core/utils/StringProcessor.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -3,14 +3,12 @@ import { FlowchartEdge, FlowchartNode } from "../../ir/ir";
export class StringProcessor {
private static escapeCache = new Map<string, string>();
private static readonly MAX_CACHE_SIZE = 1000;

// Precompiled regex for better performance
private static readonly escapeRegex = /"|\\|\n|<|>|`/g;
private static readonly colonRegex = /:$/;
private static readonly escapeMap: Record<string, string> = {
'"': "#quot;",
"\\": "\\\\",
"\n": " ",
"\n": " ",
"<": "#60;",
">": "#62;",
"`": "#96;",
Expand All @@ -22,24 +20,29 @@ export class StringProcessor {
// Check cache first
const cached = this.escapeCache.get(str);
if (cached !== undefined) {
// Move to end for LRU behavior
this.escapeCache.delete(str);
this.escapeCache.set(str, cached);
return cached;
}

// Use LRU eviction instead of clearing entire cache
// LRU eviction
if (this.escapeCache.size >= this.MAX_CACHE_SIZE) {
const firstKey = this.escapeCache.keys().next().value;
if (firstKey !== undefined) {
this.escapeCache.delete(firstKey);
}
}
let processed = str;

processed = processed.replace(/[\r\n\t]+/g, ' ');
processed = processed.replace(/\s+/g, ' ');
processed = processed.trim();

let escaped = str.replace(
let escaped = processed.replace(
this.escapeRegex,
(match) => this.escapeMap[match]
);

escaped = escaped.replace(this.colonRegex, "").trim();

// Length limiting for readability
Expand All @@ -56,7 +59,6 @@ export class StringProcessor {
this.escapeCache.clear();
}
}

export interface ProcessResult {
nodes: FlowchartNode[];
edges: FlowchartEdge[];
Expand All @@ -68,4 +70,4 @@ export interface ProcessResult {
export interface LoopContext {
breakTargetId: string;
continueTargetId: string;
}
}