src/core/Trace.ts

   1 // Copyright 2020 Blue Static <https://www.bluestatic.org>
   2 // This program is free software licensed under the GNU General Public License,
   3 // version 3.0. The full text of the license can be found in LICENSE.txt.
   4 // SPDX-License-Identifier: GPL-3.0-only
   5
   6 import { Line } from './Line';
   7
   8 var current: Trace = null;
   9
  10 var traces: Trace[] = [];
  11
  12 export default class Trace {
  13   private _stack: Set<string>[] = [];
  14   private _index = 0;
  15   private _name: string;
  16
  17   constructor(line: Line<any>) {
  18     this._name = this._formatLine(line);
  19     const s = new Set<string>();
  20
  21     s.add(`Start: ${this._name}`);
  22
  23     if (current === null) {
  24       current = this;
  25     } else {
  26       ++current._index;
  27     }
  28
  29     current._stack.push(s);
  30   }
  31
  32   static add(id: string) {
  33     if (current === null)
  34       return;
  35     current._stack[current._index].add(id);
  36   }
  37
  38   end() {
  39     --current._index;
  40     if (current === this) {
  41       current = null;
  42       traces.push(this);
  43     }
  44   }
  45
  46   get traceList(): readonly string[][] {
  47     return this._stack.map(s => [...s.values()]);
  48   }
  49
  50   private _formatLine(line: Line<any>): string {
  51     if (line.form === undefined)
  52       return `${line.constructor.name} (${line.description})`;
  53     return `${line.form.name}-${line.id} (${line.description})`;
  54   }
  55 };
  56
  57 export function getLastTraceList(): readonly string[][] {
  58   if (traces.length == 0)
  59     return null;
  60   return traces[traces.length - 1].traceList;
  61 }