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com.liferay.source.formatter.checks.WhitespaceCheck Maven / Gradle / Ivy
/**
* Copyright (c) 2000-present Liferay, Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
* Software Foundation; either version 2.1 of the License, or (at your option)
* any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
* details.
*/
package com.liferay.source.formatter.checks;
import com.liferay.petra.string.CharPool;
import com.liferay.petra.string.StringBundler;
import com.liferay.petra.string.StringPool;
import com.liferay.portal.kernel.io.unsync.UnsyncBufferedReader;
import com.liferay.portal.kernel.io.unsync.UnsyncStringReader;
import com.liferay.portal.kernel.util.StringUtil;
import com.liferay.portal.tools.ToolsUtil;
import java.io.IOException;
import java.util.Objects;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* @author Hugo Huijser
*/
public class WhitespaceCheck extends BaseFileCheck {
@Override
protected String doProcess(
String fileName, String absolutePath, String content)
throws IOException {
content = _trimContent(fileName, absolutePath, content);
content = StringUtil.replace(content, "\n\n\n", "\n\n");
if (content.startsWith(StringPool.NEW_LINE)) {
content = content.substring(1);
}
if (content.endsWith(StringPool.RETURN)) {
content = content.substring(0, content.length() - 1);
}
return content;
}
protected String formatDoubleSpace(String line) {
String trimmedLine = StringUtil.trim(line);
int x = -1;
while (true) {
x = trimmedLine.indexOf(StringPool.DOUBLE_SPACE, x + 1);
if (x == -1) {
return line;
}
if (!ToolsUtil.isInsideQuotes(trimmedLine, x)) {
return StringUtil.replace(
line, trimmedLine,
StringUtil.replaceFirst(
trimmedLine, StringPool.DOUBLE_SPACE, StringPool.SPACE,
x));
}
}
}
protected String formatIncorrectSyntax(String line, String regex) {
Pattern pattern = Pattern.compile(regex);
Matcher matcher = pattern.matcher(line);
while (matcher.find()) {
int x = matcher.start(1);
if (!ToolsUtil.isInsideQuotes(line, x)) {
return StringUtil.insert(line, StringPool.SPACE, x);
}
}
return line;
}
protected String formatIncorrectSyntax(
String line, String incorrectSyntax, String correctSyntax,
boolean lineStart) {
if (lineStart) {
if (line.startsWith(incorrectSyntax)) {
line = StringUtil.replaceFirst(
line, incorrectSyntax, correctSyntax);
}
return line;
}
for (int x = -1;;) {
x = line.indexOf(incorrectSyntax, x + 1);
if (x == -1) {
return line;
}
if (!ToolsUtil.isInsideQuotes(line, x)) {
line = StringUtil.replaceFirst(
line, incorrectSyntax, correctSyntax, x);
}
}
}
protected String formatSelfClosingTags(String line) {
Matcher matcher = _selfClosingTagsPattern.matcher(line);
while (matcher.find()) {
int level = 1;
for (int x = matcher.end(); x < line.length(); x++) {
if (ToolsUtil.isInsideQuotes(line, x)) {
continue;
}
char c = line.charAt(x);
if (c == CharPool.LESS_THAN) {
level++;
}
else if (c == CharPool.GREATER_THAN) {
level--;
}
if (level != 0) {
continue;
}
if (Objects.equals(line.substring(x - 2, x), " /")) {
break;
}
char previousChar = line.charAt(x - 1);
if (previousChar == CharPool.SPACE) {
return StringUtil.insert(line, StringPool.SLASH, x);
}
if (previousChar == CharPool.SLASH) {
return StringUtil.insert(line, StringPool.SPACE, x - 1);
}
return StringUtil.insert(line, " /", x);
}
}
return line;
}
protected String formatWhitespace(
String line, String linePart, boolean javaSource) {
String originalLinePart = linePart;
linePart = formatIncorrectSyntax(linePart, "catch(", "catch (", true);
linePart = formatIncorrectSyntax(linePart, "else{", "else {", true);
linePart = formatIncorrectSyntax(
linePart, "else if(", "else if (", true);
linePart = formatIncorrectSyntax(linePart, "for(", "for (", true);
linePart = formatIncorrectSyntax(linePart, "if(", "if (", true);
linePart = formatIncorrectSyntax(linePart, "task(", "task (", true);
linePart = formatIncorrectSyntax(linePart, "while(", "while (", true);
linePart = formatIncorrectSyntax(linePart, "List <", "List<", false);
linePart = formatIncorrectSyntax(linePart, "}else", "}\nelse", true);
linePart = formatIncorrectSyntax(linePart, "} else", "}\nelse", true);
if (javaSource) {
linePart = formatIncorrectSyntax(linePart, " ...", "...", false);
linePart = formatIncorrectSyntax(linePart, " .", ".", false);
linePart = formatIncorrectSyntax(linePart, ". ", ".", false);
linePart = formatIncorrectSyntax(linePart, " [", "[", false);
linePart = formatIncorrectSyntax(linePart, "{ ", "{", false);
linePart = formatIncorrectSyntax(linePart, " }", "}", false);
linePart = formatIncorrectSyntax(linePart, " )", ")", false);
linePart = formatIncorrectSyntax(linePart, "( ", "(", false);
linePart = formatIncorrectSyntax(linePart, "){", ") {", false);
linePart = formatIncorrectSyntax(linePart, "]{", "] {", false);
linePart = formatIncorrectSyntax(linePart, "[^\"'\\s](\\|\\|)");
linePart = formatIncorrectSyntax(linePart, "\\|\\|([^\"'\\s])");
linePart = formatIncorrectSyntax(linePart, "[^\"'\\s](\\&\\&)");
linePart = formatIncorrectSyntax(linePart, "\\&\\&([^\"'\\s])");
linePart = formatIncorrectSyntax(linePart, "\\.\\.\\.(\\w)");
linePart = formatIncorrectSyntax(linePart, "\\w(=)");
linePart = formatIncorrectSyntax(linePart, "=(\\w)");
linePart = formatIncorrectSyntax(
linePart, "for \\([^:]*[^:\"'\\s](:)");
linePart = formatIncorrectSyntax(
linePart, "for \\([^:]*:([^:\"'\\s])");
}
if (!javaSource) {
line = StringUtil.replace(line, originalLinePart, linePart);
return formatIncorrectSyntax(
line, StringPool.SPACE + StringPool.TAB, StringPool.TAB, false);
}
if (!line.contains(StringPool.DOUBLE_SLASH)) {
while (linePart.contains(StringPool.TAB)) {
linePart = StringUtil.replaceLast(
linePart, CharPool.TAB, CharPool.SPACE);
}
}
if (line.contains(StringPool.DOUBLE_SLASH)) {
line = StringUtil.replace(line, originalLinePart, linePart);
return formatIncorrectSyntax(
line, StringPool.SPACE + StringPool.TAB, StringPool.TAB, false);
}
int pos = linePart.indexOf(") ");
if ((pos != -1) && ((pos + 2) < linePart.length()) &&
!linePart.contains(StringPool.AT) &&
!ToolsUtil.isInsideQuotes(linePart, pos)) {
String linePart2 = linePart.substring(pos + 2);
if (Character.isLetter(linePart2.charAt(0)) &&
!linePart2.startsWith("default") &&
!linePart2.startsWith("instanceof") &&
!linePart2.startsWith("return") &&
!linePart2.startsWith("throws")) {
linePart = StringUtil.replaceFirst(
linePart, StringPool.SPACE, StringPool.BLANK, pos);
}
}
pos = linePart.indexOf(" (");
if ((pos != -1) && !linePart.contains(StringPool.EQUAL) &&
!ToolsUtil.isInsideQuotes(linePart, pos) &&
(linePart.startsWith("private ") ||
linePart.startsWith("protected ") ||
linePart.startsWith("public "))) {
linePart = StringUtil.replaceFirst(linePart, " (", "(", pos);
}
for (int x = -1;;) {
int posComma = linePart.indexOf(CharPool.COMMA, x + 1);
int posSemicolon = linePart.indexOf(CharPool.SEMICOLON, x + 1);
if ((posComma == -1) && (posSemicolon == -1)) {
break;
}
x = Math.min(posComma, posSemicolon);
if (x == -1) {
x = Math.max(posComma, posSemicolon);
}
if (ToolsUtil.isInsideQuotes(linePart, x)) {
continue;
}
if (linePart.length() > (x + 1)) {
char nextChar = linePart.charAt(x + 1);
if ((nextChar != CharPool.APOSTROPHE) &&
(nextChar != CharPool.CLOSE_PARENTHESIS) &&
(nextChar != CharPool.SPACE) &&
(nextChar != CharPool.STAR)) {
linePart = StringUtil.insert(
linePart, StringPool.SPACE, x + 1);
}
}
if (x > 0) {
char previousChar = linePart.charAt(x - 1);
if (previousChar == CharPool.SPACE) {
linePart =
linePart.substring(0, x - 1) + linePart.substring(x);
}
}
}
line = StringUtil.replace(line, originalLinePart, linePart);
return formatIncorrectSyntax(
line, StringPool.SPACE + StringPool.TAB, StringPool.TAB, false);
}
protected boolean isAllowLeadingSpaces(
String fileName, String absolutePath) {
return isAttributeValue(_ALLOW_LEADING_SPACES_KEY, absolutePath);
}
protected boolean isAllowTrailingEmptyLines(
String fileName, String absolutePath) {
return isAttributeValue(_ALLOW_TRAILING_EMPTY_LINES, absolutePath);
}
protected boolean isAllowTrailingSpaces(String line) {
return false;
}
protected String trimLine(
String fileName, String absolutePath, String line) {
String trimmedTrailingLine = StringUtil.trimTrailing(line);
if (trimmedTrailingLine.length() == 0) {
return StringPool.BLANK;
}
if (!isAllowTrailingSpaces(line) &&
(!isAttributeValue(
_ALLOW_TRAILING_DOUBLE_SPACE_KEY, absolutePath) ||
!line.endsWith(StringPool.DOUBLE_SPACE))) {
line = trimmedTrailingLine;
}
if (!isAttributeValue(_ALLOW_DOUBLE_SPACE_KEY, absolutePath)) {
line = formatDoubleSpace(line);
}
if (isAllowLeadingSpaces(fileName, absolutePath) ||
line.startsWith(" *")) {
return line;
}
while (line.matches("^\t* .*")) {
line = StringUtil.replaceFirst(
line, StringPool.FOUR_SPACES, StringPool.TAB);
}
while (line.startsWith(StringPool.SPACE)) {
line = StringUtil.replaceFirst(
line, CharPool.SPACE, StringPool.BLANK);
}
return line;
}
private String _trimContent(
String fileName, String absolutePath, String content)
throws IOException {
StringBundler sb = new StringBundler();
try (UnsyncBufferedReader unsyncBufferedReader =
new UnsyncBufferedReader(new UnsyncStringReader(content))) {
String line = null;
while ((line = unsyncBufferedReader.readLine()) != null) {
sb.append(trimLine(fileName, absolutePath, line));
sb.append("\n");
}
}
if (isAllowTrailingEmptyLines(fileName, absolutePath) &&
content.endsWith("\n")) {
return sb.toString();
}
content = sb.toString();
if (content.endsWith("\n")) {
content = content.substring(0, content.length() - 1);
}
return content;
}
private static final String _ALLOW_DOUBLE_SPACE_KEY = "allowDoubleSpace";
private static final String _ALLOW_LEADING_SPACES_KEY =
"allowLeadingSpaces";
private static final String _ALLOW_TRAILING_DOUBLE_SPACE_KEY =
"allowTrailingDoubleSpace";
private static final String _ALLOW_TRAILING_EMPTY_LINES =
"allowTrailingEmptyLines";
private static final Pattern _selfClosingTagsPattern = Pattern.compile(
"<(area|base|br|col|command|embed|hr|img|input|keygen|link|meta|" +
"param|source|track|wbr)(?!( />|\\w))");
}
