tests/compiler/dart2js/sourcemaps/trace_graph.dart

// Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

library sourcemap.trace_graph;

import 'dart:collection';

import 'package:compiler/src/io/source_information.dart';
import 'package:compiler/src/io/position_information.dart';

import 'sourcemap_html_helper.dart';

class TraceGraph {
  List<TraceStep> steps = <TraceStep>[];
  TraceStep entry;
  Queue stack = new Queue();

  void addStep(TraceStep step) {
    steps.add(step);
    step.stack = stack.toList();
  }

  void pushBranch(branch) {
    stack.addLast(branch);
  }

  void popBranch() {
    stack.removeLast();
  }
}

class TraceStep {
  final int id;
  final node;
  final Offset offset;
  final List text;
  final SourceLocation sourceLocation;

  TraceStep next;
  Map<dynamic, TraceStep> branchMap;

  List stack;

  TraceStep(
      this.id,
      this.node,
      this.offset,
      this.text,
      [this.sourceLocation]);

  String toString() => '<span style="background:${toColorCss(id)}">$id</span>';
}