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/*
* Copyright 2000-2013 JetBrains s.r.o.
*
* 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 com.intellij.execution.process;
import com.intellij.openapi.util.Key;
import com.intellij.openapi.util.Pair;
import com.intellij.util.containers.ContainerUtil;
import org.jetbrains.annotations.NotNull;
import java.util.List;
/**
* @author traff
*/
public class AnsiEscapeDecoder {
private static final char TEXT_ATTRS_PREFIX_CH = '\u001B';
private static final String TEXT_ATTRS_PREFIX = Character.toString(TEXT_ATTRS_PREFIX_CH) + "[";
private static final String TEXT_ATTRS_PATTERN = "m" + TEXT_ATTRS_PREFIX_CH + "\\[";
private Key myCurrentColor;
/**
* Parses ansi-color codes from text and sends text fragments with color attributes to textAcceptor
*
* @param text
* @param outputType
* @param textAcceptor if implements ColoredTextAcceptor then it will receive text fragments with color attributes
* if implements ColoredChunksAcceptor then it will receive list of pairs <text, attribute>
*/
public void escapeText(String text, Key outputType, ColoredTextAcceptor textAcceptor) {
final List<Pair<String, Key>> textChunks = ContainerUtil.newArrayList();
int pos = 0;
while (true) {
int macroPos = text.indexOf(TEXT_ATTRS_PREFIX, pos);
if (macroPos < 0) break;
if (pos != macroPos) {
textChunks.add(Pair.create(text.substring(pos, macroPos), getCurrentOutputAttributes(outputType)));
}
final int macroEndPos = getEndMacroPos(text, macroPos);
if (macroEndPos < 0) {
break;
}
// this is a simple fix for RUBY-8996:
// we replace several consecutive escape sequences with one which contains all these sequences
final String colorAttribute = text.substring(macroPos, macroEndPos).replaceAll(TEXT_ATTRS_PATTERN, ";");
myCurrentColor = ColoredOutputTypeRegistry.getInstance().getOutputKey(colorAttribute);
pos = macroEndPos;
}
if (pos < text.length()) {
textChunks.add(Pair.create(text.substring(pos), getCurrentOutputAttributes(outputType)));
}
if (textAcceptor instanceof ColoredChunksAcceptor) {
((ColoredChunksAcceptor)textAcceptor).coloredChunksAvailable(textChunks);
}
else {
coloredTextAvailable(textChunks, textAcceptor);
}
}
// selects all consecutive escape sequences
private static int getEndMacroPos(final String text, int macroPos) {
int endMacroPos = text.indexOf('m', macroPos);
while (endMacroPos >= 0) {
endMacroPos += 1;
macroPos = text.indexOf(TEXT_ATTRS_PREFIX, endMacroPos);
if (macroPos != endMacroPos) {
break;
}
endMacroPos = text.indexOf('m', macroPos);
}
return endMacroPos;
}
protected Key getCurrentOutputAttributes(final Key outputType) {
if (outputType == ProcessOutputTypes.STDERR || outputType == ProcessOutputTypes.SYSTEM) {
return outputType;
}
return myCurrentColor != null ? myCurrentColor : outputType;
}
public void coloredTextAvailable(@NotNull final List<Pair<String, Key>> textChunks, ColoredTextAcceptor textAcceptor) {
for (final Pair<String, Key> textChunk : textChunks) {
textAcceptor.coloredTextAvailable(textChunk.getFirst(), textChunk.getSecond());
}
}
public interface ColoredChunksAcceptor extends ColoredTextAcceptor {
void coloredChunksAvailable(List<Pair<String, Key>> chunks);
}
public interface ColoredTextAcceptor {
void coloredTextAvailable(String text, Key attributes);
}
}
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