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/*
* Copyright (C) 2007-2010 Júlio Vilmar Gesser.
* Copyright (C) 2011, 2013-2016 The JavaParser Team.
*
* This file is part of JavaParser.
*
* JavaParser can be used either under the terms of
* a) the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
* b) the terms of the Apache License
*
* You should have received a copy of both licenses in LICENCE.LGPL and
* LICENCE.APACHE. Please refer to those files for details.
*
* JavaParser 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.github.javaparser.printer;
import com.github.javaparser.Position;
import com.github.javaparser.utils.Utils;
public class SourcePrinter {
private final String indentation;
private final int indentationLength;
private final String endOfLineCharacter;
private int level = 0;
private boolean indented = false;
private final StringBuilder buf = new StringBuilder();
private Position cursor = new Position(1, 0);
SourcePrinter(final String indentation, final String endOfLineCharacter) {
this.indentation = indentation;
this.indentationLength = indentation.length();
this.endOfLineCharacter = endOfLineCharacter;
}
public SourcePrinter indent() {
level++;
return this;
}
public SourcePrinter unindent() {
level--;
return this;
}
private void makeIndent() {
for (int i = 0; i < level; i++) {
buf.append(indentation);
cursor = Position.pos(cursor.line, cursor.column + indentationLength);
}
}
/**
* Append the source string passed as argument to the buffer.
* If this is being appended at the beginning of a line, performs indentation first.
* <p>
* The source line to be printed should not contain newline/carriage-return characters;
* use {@link #println(String)} to automatically append a newline at the end of the source string.
* If the source line passed as argument contains newline/carriage-return characters would
* impredictably affect a correct computation of the current {@link #getCursor()} position.
*
* @see SourcePrinter#println(String)
* @param arg source line to be printed (should not contain newline/carriage-return characters)
* @return this instance, for nesting calls to method as fluent interface
*/
public SourcePrinter print(final String arg) {
if (!indented) {
makeIndent();
indented = true;
}
buf.append(arg);
cursor = Position.pos(cursor.line, cursor.column + arg.length());
return this;
}
/**
* Append the source string passed as argument to the buffer, then append a newline.
* If this is being appended at the beginning of a line, performs indentation first.
* <p>
* The source line to be printed should not contain newline/carriage-return characters.
* If the source line passed as argument contains newline/carriage-return characters would
* impredictably affect a correct computation of the current {@link #getCursor()} position.
*
* @param arg source line to be printed (should not contain newline/carriage-return characters)
* @return this instance, for nesting calls to method as fluent interface
*/
public SourcePrinter println(final String arg) {
print(arg);
println();
return this;
}
/**
* Append a newline to the buffer.
*
* @return this instance, for nesting calls to method as fluent interface
*/
public SourcePrinter println() {
buf.append(endOfLineCharacter);
cursor = Position.pos(cursor.line + 1, 0);
indented = false;
return this;
}
/**
* Return the current cursor position (line, column) in the source printer buffer.
* <p>
* Please notice in order to guarantee a correct computation of the cursor position,
* this printer expect the contracts of the methods {@link #print(String)} and {@link #println(String)}
* has been respected through all method calls, meaning the source string passed as argument to those method
* calls did not contain newline/carriage-return characters.
*
* @return the current cursor position (line, column).
*/
public Position getCursor() {
return cursor;
}
/**
* Performs a new line and indent, then prints enough space characters until aligned to the specified column.
* @param column the column to align to
*/
public void wrapToColumn(int column) {
println();
if (!indented) {
makeIndent();
indented = true;
}
while ( cursor.column < column ) {
print(" ");
}
}
public String getSource() {
return buf.toString();
}
@Override
public String toString() {
return getSource();
}
public String normalizeEolInTextBlock(String content) {
return Utils.normalizeEolInTextBlock(content, endOfLineCharacter);
}
}
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