refactor progress

packages/markdown_parser/src/parser/FormattingContext.tsx

@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2026 Fluxer Contributors
+ *
+ * This file is part of Fluxer.
+ *
+ * Fluxer is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Fluxer is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with Fluxer. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import {MAX_INLINE_DEPTH} from '@fluxer/markdown_parser/src/types/MarkdownConstants';
+
+export class FormattingContext {
+	private readonly activeFormattingTypes = new Map<string, boolean>();
+	private readonly formattingStack: Array<[string, boolean]> = [];
+	private currentDepth = 0;
+
+	canEnterFormatting(delimiter: string, isDouble: boolean): boolean {
+		const key = this.getFormattingKey(delimiter, isDouble);
+		if (this.activeFormattingTypes.has(key)) return false;
+		return this.currentDepth < MAX_INLINE_DEPTH;
+	}
+
+	isFormattingActive(delimiter: string, isDouble: boolean): boolean {
+		return this.activeFormattingTypes.has(this.getFormattingKey(delimiter, isDouble));
+	}
+
+	pushFormatting(delimiter: string, isDouble: boolean): void {
+		this.formattingStack.push([delimiter, isDouble]);
+		this.activeFormattingTypes.set(this.getFormattingKey(delimiter, isDouble), true);
+		this.currentDepth++;
+	}
+
+	popFormatting(): [string, boolean] | undefined {
+		const removed = this.formattingStack.pop();
+		if (removed) {
+			this.activeFormattingTypes.delete(this.getFormattingKey(removed[0], removed[1]));
+			this.currentDepth--;
+		}
+		return removed;
+	}
+
+	setCurrentText(_text: string): void {}
+
+	private getFormattingKey(delimiter: string, isDouble: boolean): string {
+		return `${delimiter}${isDouble ? '2' : '1'}`;
+	}
+}