// Copyright (c) Microsoft Corporation. All rights reserved.

// Licensed under the MIT License.

import { isWhiteSpace } from './characters';

// Copyright (c) Microsoft Corporation. All rights reserved.

// Licensed under the MIT License.

export class TextBuilder {

private segments: string[] = [];

public getText(): string {

if (this.isLastWhiteSpace()) {

this.segments.pop();

}

return this.segments.join('');

}

public softAppendSpace(count: number = 1): void {

if (this.segments.length === 0) {

return;

}

if (this.isLastWhiteSpace()) {

count = count - 1;

}

for (let i = 0; i < count; i += 1) {

this.segments.push(' ');

}

}

public append(text: string): void {

this.segments.push(text);

}

private isLastWhiteSpace(): boolean {

return this.segments.length > 0 && this.isWhitespace(this.segments[this.segments.length - 1]);

}

private isWhitespace(s: string): boolean {

for (let i = 0; i < s.length; i += 1) {

if (!isWhiteSpace(s.charCodeAt(i))) {

return false;

}

}

return true;

}

}