/*
* Copyright 2014 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.yarn.boot.cli.shell;
import jline.Terminal;
import org.fusesource.jansi.Ansi;
import org.fusesource.jansi.AnsiRenderer.Code;
/**
* Simple utitliy class to build an ANSI string when supported by the {@link Terminal}.
*
* @author Phillip Webb
*/
class AnsiString {
private final Terminal terminal;
private final StringBuilder value = new StringBuilder();
/**
* Create a new {@link AnsiString} for the given {@link Terminal}.
* @param terminal the terminal used to test if {@link Terminal#isAnsiSupported() ANSI
* is supported}.
*/
AnsiString(Terminal terminal) {
this.terminal = terminal;
}
/**
* Append text with the given ANSI codes
* @param text the text to append
* @param codes the ANSI codes
* @return this string
*/
AnsiString append(String text, Code... codes) {
if (codes.length == 0 || !isAnsiSupported()) {
this.value.append(text);
return this;
}
Ansi ansi = Ansi.ansi();
for (Code code : codes) {
ansi = applyCode(ansi, code);
}
this.value.append(ansi.a(text).reset().toString());
return this;
}
private Ansi applyCode(Ansi ansi, Code code) {
if (code.isColor()) {
if (code.isBackground()) {
return ansi.bg(code.getColor());
}
return ansi.fg(code.getColor());
}
return ansi.a(code.getAttribute());
}
private boolean isAnsiSupported() {
return this.terminal.isAnsiSupported();
}
@Override
public String toString() {
return this.value.toString();
}
}