1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
// @flow
import * as t from "@babel/types";
import type { SimplePath } from "./utils/simple-path";
import type { SourceLocation, SourceId } from "../../types";
import type { AstPosition } from "./types";
import { getClosestPath } from "./utils/closest";
import { isAwaitExpression, isYieldExpression } from "./utils/helpers";
export function getNextStep(
sourceId: SourceId,
pausedPosition: AstPosition
): ?SourceLocation {
const currentExpression = getSteppableExpression(sourceId, pausedPosition);
if (!currentExpression) {
return null;
}
const currentStatement = currentExpression.find(p => {
return p.inList && t.isStatement(p.node);
});
if (!currentStatement) {
throw new Error(
"Assertion failure - this should always find at least Program"
);
}
return _getNextStep(currentStatement, sourceId, pausedPosition);
}
function getSteppableExpression(
sourceId: SourceId,
pausedPosition: AstPosition
) {
const closestPath = getClosestPath(sourceId, pausedPosition);
if (!closestPath) {
return null;
}
if (isAwaitExpression(closestPath) || isYieldExpression(closestPath)) {
return closestPath;
}
return closestPath.find(
p => t.isAwaitExpression(p.node) || t.isYieldExpression(p.node)
);
}
function _getNextStep(
statement: SimplePath,
sourceId: SourceId,
position: AstPosition
): ?SourceLocation {
const nextStatement = statement.getSibling(1);
if (nextStatement) {
return {
...nextStatement.node.loc.start,
sourceId,
};
}
return null;
}
|
