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com.liferay.source.formatter.checks.JSPIndentationCheck 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.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.kernel.util.Validator;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* @author Hugo Huijser
*/
public class JSPIndentationCheck extends BaseFileCheck {
@Override
protected String doProcess(
String fileName, String absolutePath, String content)
throws IOException {
if (!fileName.endsWith(".jsp") && !fileName.endsWith(".jspf") &&
!fileName.endsWith(".tag")) {
return content;
}
String originalContent = content;
while (true) {
String newContent = _formatTabs(content, originalContent);
if (newContent.equals(content) ||
newContent.equals(originalContent)) {
return _fixTabsInJavaSource(newContent);
}
content = newContent;
}
}
private int _calculateTabLevel(String text, boolean javaSource) {
if (javaSource) {
return getLevel(
text,
new String[] {
StringPool.OPEN_CURLY_BRACE, StringPool.OPEN_PARENTHESIS
},
new String[] {
StringPool.CLOSE_CURLY_BRACE, StringPool.CLOSE_PARENTHESIS
});
}
if (text.matches("(--)?%>")) {
return -1;
}
text = _stripJavaSource(text);
text = stripQuotes(text);
int level = 0;
for (int i = 0; i < text.length(); i++) {
char c = text.charAt(i);
if (c == '<') {
if (((i + 1) < text.length()) && (text.charAt(i + 1) == '!')) {
continue;
}
if (((i + 1) < text.length()) && (text.charAt(i + 1) == '/')) {
level -= 1;
}
else {
level += 1;
}
}
else if ((c == '>') && (i > 0) && (text.charAt(i - 1) == '/')) {
level -= 1;
}
else if (c == '{') {
level += 1;
}
else if (c == '}') {
level -= 1;
}
}
return level;
}
private String _fixTabs(String content, int lineNumber, int diff) {
return _fixTabs(content, lineNumber, lineNumber, diff);
}
private String _fixTabs(
String content, int startLine, int endLine, int diff) {
boolean insideUnformattedTextTag = false;
for (int i = startLine; i <= endLine; i++) {
String line = getLine(content, i);
if (Validator.isNull(line) || (getLeadingTabCount(line) < diff)) {
continue;
}
String trimmedLine = StringUtil.trimLeading(line);
if (insideUnformattedTextTag) {
if (trimmedLine.matches(".*")) {
insideUnformattedTextTag = false;
if (trimmedLine.matches(".+")) {
continue;
}
}
else {
continue;
}
}
int lineStartPos = getLineStartPos(content, i);
if (diff < 0) {
content =
content.substring(0, lineStartPos) + "\t" +
content.substring(lineStartPos);
}
else {
content =
content.substring(0, lineStartPos) +
content.substring(lineStartPos + 1);
}
if (!insideUnformattedTextTag &&
trimmedLine.matches("<(pre|textarea).*")) {
insideUnformattedTextTag = true;
}
}
return content;
}
private String _fixTabsInJavaSource(String content) {
Matcher matcher = _javaSourcePattern1.matcher(content);
while (matcher.find()) {
String tabs = matcher.group(1);
int minimumTabCount = _getMinimumTabCount(matcher.group(2));
if (tabs.length() != minimumTabCount) {
int diff = minimumTabCount - tabs.length();
int end = getLineNumber(content, matcher.end(2));
int start = getLineNumber(content, matcher.start(3));
return _fixTabs(content, start, end, diff);
}
String javaCloseTagTabs = matcher.group(4);
if (!tabs.equals(javaCloseTagTabs)) {
int diff = javaCloseTagTabs.length() - tabs.length();
return _fixTabs(
content, getLineNumber(content, matcher.end(4)), diff);
}
}
matcher = _javaSourcePattern2.matcher(content);
while (matcher.find()) {
String tabs = matcher.group(1);
int minimumTabCount = _getMinimumTabCount(matcher.group(2));
if ((tabs.length() + 1) != minimumTabCount) {
int diff = minimumTabCount - (tabs.length() + 1);
int end = getLineNumber(content, matcher.end(2));
int start = getLineNumber(content, matcher.start(3));
return _fixTabs(content, start, end, diff);
}
}
return content;
}
private String _formatTabs(String content, String originalContent)
throws IOException {
List jspLines = _getJSPLines(content);
if (jspLines == null) {
return originalContent;
}
for (int i = 0; i < jspLines.size(); i++) {
JSPLine jspLine = jspLines.get(i);
if (jspLine.isCloseTag()) {
if (!jspLine.isClosed()) {
return originalContent;
}
continue;
}
String line = jspLine.getLine();
if (!jspLine.isOpenTag()) {
if (!jspLine.isJavaSource()) {
int actualTabCount = jspLine.getLeadingTabCount();
int expectedTabCount = jspLine.getTabLevel();
String trimmedLine = StringUtil.trim(line);
if (trimmedLine.equals(StringPool.GREATER_THAN)) {
expectedTabCount -= 1;
}
if (expectedTabCount != actualTabCount) {
return _fixTabs(
content, jspLine.getLineNumber(),
actualTabCount - expectedTabCount);
}
}
continue;
}
JSPLine closeTagJSPLine = _getCloseTagJSPLine(jspLine, jspLines, i);
if (closeTagJSPLine == null) {
return originalContent;
}
String closeTagName = closeTagJSPLine.getTagName();
String openTagName = jspLine.getTagName();
if (Validator.isNotNull(closeTagName) &&
!closeTagName.equals(openTagName)) {
return originalContent;
}
int expectedTabCount = _getExpectedTabCount(
jspLine, closeTagJSPLine, jspLines, i);
int actualCloseTagTabCount = closeTagJSPLine.getLeadingTabCount();
int actualOpenTagTabCount = jspLine.getLeadingTabCount();
if (expectedTabCount != actualOpenTagTabCount) {
int diff = actualOpenTagTabCount - expectedTabCount;
if (actualOpenTagTabCount == actualCloseTagTabCount) {
return _fixTabs(
content, jspLine.getLineNumber(),
closeTagJSPLine.getLineNumber(), diff);
}
return _fixTabs(content, jspLine.getLineNumber(), diff);
}
if (expectedTabCount != actualCloseTagTabCount) {
return _fixTabs(
content, closeTagJSPLine.getLineNumber(),
actualCloseTagTabCount - expectedTabCount);
}
closeTagJSPLine.setClosed(true);
}
return content;
}
private JSPLine _getCloseTagJSPLine(
JSPLine openTagJSPLine, List jspLines, int index) {
while (true) {
index++;
if (index >= jspLines.size()) {
return null;
}
JSPLine jspLine = jspLines.get(index);
if (!jspLine.isCloseTag()) {
continue;
}
String openTagLine = openTagJSPLine.getLine();
if (openTagLine.matches("\t*<%!?")) {
String line = jspLine.getLine();
if (line.matches("\t*%>")) {
return jspLine;
}
continue;
}
if (jspLine.isCloseTag() &&
(openTagJSPLine.getTabLevel() ==
(jspLine.getLineTabLevel() + jspLine.getTabLevel()))) {
return jspLine;
}
}
}
private int _getExpectedTabCount(
JSPLine startTagJSPLine, JSPLine closeTagJSPLine,
List jspLines, int index) {
String startTagLine = startTagJSPLine.getLine();
if (!startTagLine.matches("\t*<%!?")) {
return startTagJSPLine.getTabLevel();
}
int minJavaSourceLevel = startTagJSPLine.getTabLevel();
while (true) {
index++;
JSPLine jspLine = jspLines.get(index);
minJavaSourceLevel = Math.min(
minJavaSourceLevel, jspLine.getTabLevel() - 1);
if (jspLine.equals(closeTagJSPLine)) {
return minJavaSourceLevel;
}
}
}
private List _getJSPLines(String content) throws IOException {
List jspLines = new ArrayList<>();
try (UnsyncBufferedReader unsyncBufferedReader =
new UnsyncBufferedReader(new UnsyncStringReader(content))) {
String line = null;
int lineNumber = 0;
int tabLevel = 0;
boolean javaSource = false;
boolean scriptSource = false;
boolean multiLineComment = false;
boolean insideUnformattedTextTag = false;
while ((line = unsyncBufferedReader.readLine()) != null) {
lineNumber++;
if (Validator.isNull(line)) {
continue;
}
String trimmedLine = StringUtil.trimLeading(line);
if (trimmedLine.matches(
"(<%@ )?(page import|tag import|taglib uri)=.*")) {
continue;
}
if (javaSource) {
if (trimmedLine.matches("%>[\"']?")) {
javaSource = false;
}
else if (trimmedLine.startsWith("/*") &&
!trimmedLine.startsWith("/**")) {
multiLineComment = true;
continue;
}
if (line.endsWith("*/")) {
multiLineComment = false;
continue;
}
if (multiLineComment || trimmedLine.startsWith("*") ||
trimmedLine.startsWith("/*") ||
trimmedLine.startsWith("//")) {
continue;
}
}
int lineTabLevel = _calculateTabLevel(trimmedLine, javaSource);
if (!javaSource && !scriptSource && line.endsWith("--%>")) {
multiLineComment = false;
}
if (insideUnformattedTextTag) {
if (trimmedLine.matches(".*")) {
insideUnformattedTextTag = false;
if (trimmedLine.matches(".+")) {
continue;
}
}
else {
continue;
}
}
if (scriptSource) {
if (trimmedLine.matches("")) {
scriptSource = false;
}
else {
continue;
}
}
if (trimmedLine.equals("AUI.add(")) {
return jspLines;
}
if (!multiLineComment) {
if (!javaSource && (Math.abs(lineTabLevel) > 1)) {
return null;
}
JSPLine jspLine = new JSPLine(
line, lineNumber, tabLevel, lineTabLevel, javaSource);
jspLines.add(jspLine);
}
if (!javaSource &&
(trimmedLine.matches("<%!?") ||
trimmedLine.matches(".*[\"']<%="))) {
javaSource = true;
}
else if (!multiLineComment) {
if (trimmedLine.matches("<(aui:)?script.*") &&
(lineTabLevel > 0)) {
scriptSource = true;
}
else if (trimmedLine.startsWith("<%--") &&
!line.endsWith("--%>")) {
multiLineComment = true;
}
else if (trimmedLine.matches("<(pre|textarea).*") &&
!trimmedLine.matches(".*")) {
insideUnformattedTextTag = true;
continue;
}
}
tabLevel += lineTabLevel;
}
}
return jspLines;
}
private int _getLeadingTabCount(String line) {
return getLeadingTabCount(line);
}
private int _getMinimumTabCount(String s) {
int minimumTabCount = -1;
String[] lines = StringUtil.splitLines(s);
for (int i = 1; i < lines.length; i++) {
String line = lines[i];
if (Validator.isNull(line)) {
continue;
}
int tabCount = getLeadingTabCount(line);
if ((minimumTabCount == -1) || (tabCount < minimumTabCount)) {
minimumTabCount = tabCount;
}
}
return minimumTabCount;
}
private String _stripJavaSource(String text) {
while (true) {
int x = text.indexOf("<%");
if (x == -1) {
return text;
}
int y = text.indexOf("%>", x);
if (y == -1) {
return text;
}
text = text.substring(0, x) + text.substring(y + 2);
}
}
private static final Pattern _javaSourcePattern1 = Pattern.compile(
"\n(\t*)(<%\\!?\n(\t*[^\t%].*?))\n(\t*)%>(\n|\\Z)", Pattern.DOTALL);
private static final Pattern _javaSourcePattern2 = Pattern.compile(
"\n(\t*)([^\t\n]+[\"']<%=\n(\t*[^\t%].*?))\n\t*%>[\"']\n",
Pattern.DOTALL);
private class JSPLine {
public JSPLine(
String line, int lineNumber, int tabLevel, int lineTabLevel,
boolean javaSource) {
_line = line;
_lineNumber = lineNumber;
_tabLevel = tabLevel;
_lineTabLevel = lineTabLevel;
_javaSource = javaSource;
}
public int getLeadingTabCount() {
return _getLeadingTabCount(_line);
}
public String getLine() {
return _line;
}
public int getLineNumber() {
return _lineNumber;
}
public int getLineTabLevel() {
return _lineTabLevel;
}
public int getTabLevel() {
return _tabLevel;
}
public String getTagName() {
Matcher matcher = null;
if (isCloseTag()) {
matcher = _closeTagNamePattern.matcher(_line);
}
else if (isOpenTag()) {
matcher = _openTagNamePattern.matcher(_line);
}
else {
return null;
}
if (matcher.find()) {
return matcher.group(1);
}
return null;
}
public boolean isClosed() {
return _closed;
}
public boolean isCloseTag() {
if (!_javaSource && (_lineTabLevel == -1)) {
return true;
}
return false;
}
public boolean isJavaSource() {
return _javaSource;
}
public boolean isOpenTag() {
if (!_javaSource && (_lineTabLevel == 1) &&
_line.matches("^\\s*<.*")) {
return true;
}
return false;
}
public void setClosed(boolean closed) {
_closed = closed;
}
private boolean _closed;
private final Pattern _closeTagNamePattern = Pattern.compile(
"");
private final boolean _javaSource;
private final String _line;
private final int _lineNumber;
private int _lineTabLevel;
private final Pattern _openTagNamePattern = Pattern.compile(
"<([\\-:\\w]+?)([ >\n].*|$)");
private final int _tabLevel;
}
}
