blob: ad235d786799ccfebe299a686caaa78450c1f93d (
plain) (
blame)
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
|
// Copyright 2019 Oath Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.text;
/**
* Pretty prints any parenthesis expression
*
* @author bratseth
*/
public class ParenthesisExpressionPrettyPrinter {
private static final int indentUnit = 2;
public static String prettyPrint(String parenthesisExpression) {
StringBuilder b = new StringBuilder();
prettyPrint(parenthesisExpression, 0, b);
return b.toString();
}
private static void prettyPrint(String expression, int indent, StringBuilder b) {
int nextStartParenthesis = expression.indexOf("(");
int nextEndParenthesis = expression.indexOf(")");
if (nextStartParenthesis < 0)
nextStartParenthesis = Integer.MAX_VALUE;
if (nextEndParenthesis < 0)
nextEndParenthesis = Integer.MAX_VALUE;
boolean start = nextStartParenthesis < nextEndParenthesis;
int nextParenthesis = Math.min(nextStartParenthesis, nextEndParenthesis);
int effectiveIndent = start || nextParenthesis > 0 ? indent : indent - 2;
b.append(" ".repeat(Math.max(0, effectiveIndent)));
if (nextParenthesis == Integer.MAX_VALUE) {
b.append(expression);
}
else {
if (! start && nextParenthesis > 0) {
b.append(expression, 0, nextParenthesis).append("\n");
b.append(" ".repeat(Math.max(0, indent - 2))).append(")\n");
}
else {
b.append(expression, 0, nextParenthesis + 1).append("\n");
}
prettyPrint(expression.substring(nextParenthesis + 1), indent + (start ? indentUnit : -indentUnit), b);
}
}
}
|
