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/* ____ ____ ____ ____ ______ *\
** / __// __ \/ __// __ \/ ____/ SOcos COmpiles Scala **
** __\_ \/ /_/ / /__/ /_/ /\_ \ (c) 2002, LAMP/EPFL **
** /_____/\____/\___/\____/____/ **
\* */
// $Id$
package meta.util;
/** A string generator with support for indentation and spacing. */
public class TextWriter {
//########################################################################
// Private Constants
/** The line separator */
private static final String LINE = System.getProperty("line.separator");
/** The default width of an indentation level */
private static final String STEP = " ";
//########################################################################
// Private Fields
/** The output buffer */
private final StringBuffer buffer;
/** The width of an indentation level */
private final String step;
/** The current indentation level */
private int level;
/** Do we need to align? */
private boolean align;
/** Do we need to print a white space? */
private boolean space;
/** Is there already a empty line? */
private boolean line;
//########################################################################
// Public Constructors
/** Creates a new TextWriter. */
public TextWriter() {
this(new StringBuffer());
}
/** Creates a new TextWriter. */
public TextWriter(String step) {
this(new StringBuffer(), step);
}
/** Creates a new TextWriter. */
public TextWriter(String step, int level) {
this(new StringBuffer(), step, level);
}
/** Creates a new TextWriter. */
public TextWriter(StringBuffer buffer) {
this(buffer, STEP, 0);
}
/** Creates a new TextWriter. */
public TextWriter(StringBuffer buffer, String step) {
this(buffer, step, 0);
}
/** Creates a new TextWriter. */
public TextWriter(StringBuffer buffer, String step, int level) {
this.buffer = buffer;
this.step = step;
this.level = level;
this.align = false;
this.space = false;
this.line = false;
}
//########################################################################
// Public Methods - Printing
/** Prints a new line. */
public TextWriter println() {
return line();
}
/** Prints the boolean value followed by a new line. */
public TextWriter println(boolean value) {
return print(value).line();
}
/** Prints the byte value followed by a new line. */
public TextWriter println(byte value) {
return print(value).line();
}
/** Prints the short value followed by a new line. */
public TextWriter println(short value) {
return print(value).line();
}
/** Prints the char value followed by a new line. */
public TextWriter println(char value) {
return print(value).line();
}
/** Prints the int value followed by a new line. */
public TextWriter println(int value) {
return print(value).line();
}
/** Prints the long value followed by a new line. */
public TextWriter println(long value) {
return print(value).line();
}
/** Prints the float value followed by a new line. */
public TextWriter println(float value) {
return print(value).line();
}
/** Prints the double value followed by a new line. */
public TextWriter println(double value) {
return print(value).line();
}
/** Prints the string followed by a new line. */
public TextWriter println(String value) {
return print(value).line();
}
/** Prints the boolean value. */
public TextWriter print(boolean value) {
return print(String.valueOf(value));
}
/** Prints the byte value. */
public TextWriter print(byte value) {
return print(String.valueOf(value));
}
/** Prints the short value. */
public TextWriter print(short value) {
return print(String.valueOf(value));
}
/** Prints the char value. */
public TextWriter print(char value) {
return print(String.valueOf(value));
}
/** Prints the int value. */
public TextWriter print(int value) {
return print(String.valueOf(value));
}
/** Prints the long value. */
public TextWriter print(long value) {
return print(String.valueOf(value));
}
/** Prints the float value. */
public TextWriter print(float value) {
return print(String.valueOf(value));
}
/** Prints the long value. */
public TextWriter print(double value) {
return print(String.valueOf(value));
}
/** Prints the string. */
public TextWriter print(String value) {
if (align) for (int i = 0; i < level; i++) buffer.append(step);
if (space) buffer.append(' ');
buffer.append(value);
align = false;
space = false;
line = false;
return this;
}
//########################################################################
// Public Methods - Formating
/** Returns the indentation width. */
public int getIndentWidth() {
return step == null ? -1 : step.length();
}
/** Returns the indentation level. */
public int getIndentLevel() {
return level;
}
/** Sets the indentation level. */
public TextWriter setIndentLevel(int level) {
this.level = level;
return this;
}
/** Increases the indentation level by one. */
public TextWriter indent() {
level++;
return this;
}
/** Decreases the indentation level by one. */
public TextWriter undent() {
level--;
return this;
}
/** Starts a new line. */
public TextWriter line() {
if (step == null) return space();
if (line) return this;
buffer.append(LINE);
line = align;
align = true;
space = false;
return this;
}
/** Inserts a white space. */
public TextWriter space() {
space = !align;
return this;
}
//########################################################################
// Public Methods - Accessing
/** Returns the underlying StringBuffer. */
public StringBuffer getBuffer() {
return buffer;
}
/** Returns the generated string. */
public String toString() {
return buffer.toString();
}
//########################################################################
}
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