de.intarsys.pdf.content.common.CSPrettyPrinter Maven / Gradle / Ivy

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/*
 * Copyright (c) 2007, intarsys consulting GmbH
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 *
 * - Neither the name of intarsys nor the names of its contributors may be used
 *   to endorse or promote products derived from this software without specific
 *   prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
package de.intarsys.pdf.content.common;

import de.intarsys.pdf.content.CSContent;
import de.intarsys.pdf.content.CSOperation;
import de.intarsys.pdf.content.CSOperators;

/**
 * A simple pretty printer for content streams.
 * 
 */
public class CSPrettyPrinter {
	private static final int COL_WIDTH = 50;

	/**
	 * The string buffer containing the current serialized rendering program
	 */
	private StringBuilder sb;

	private StringBuilder lb;

	private boolean createComment = false;

	private boolean createLineSeparator = true;

	private boolean createIndent = true;

	/**
	 * The line separator to use
	 */
	private String lineSeparator = System.getProperty("line.separator"); //$NON-NLS-1$

	/**
	 * The current indent. The pretty printer indents the program for each
	 * save/restore graphic state operation pair.
	 */
	private int indent = 0;

	public CSPrettyPrinter() {
		super();
	}

	public String getValue() {
		return sb.toString();
	}

	public void print(CSContent content) {
		sb = new StringBuilder();
		lb = new StringBuilder();
		int len = content.size();
		for (int i = 0; i < len; i++) {
			CSOperation operation = content.getOperation(i);
			printOperation(operation);
		}
	}

	protected void printOperation(CSOperation operation) {
		lb.setLength(0);
		if (operation.matchesOperator(CSOperators.CSO_Q)) {
			indent--;
		}
		if (isCreateIndent()) {
			for (int i = 0; i < indent; i++) {
				lb.append("   "); //$NON-NLS-1$
			}
		}
		String opString = operation.toString();
		lb.append(opString);
		if (isCreateComment()) {
			for (int i = lb.length(); i < COL_WIDTH; i++) {
				lb.append(" "); //$NON-NLS-1$
			}
			lb.append("% "); //$NON-NLS-1$
			String opDescription = CSOperators.getDescription(operation
					.getOperator());
			lb.append(opDescription);
		}
		if (isCreateLineSeparator() || isCreateComment() || isCreateIndent()) {
			lb.append(lineSeparator);
		} else {
			lb.append(" "); //$NON-NLS-1$
		}
		if (operation.matchesOperator(CSOperators.CSO_q)) {
			indent++;
		}
		sb.append(lb);
	}

	public boolean isCreateComment() {
		return createComment;
	}

	public void setCreateComment(boolean createComment) {
		this.createComment = createComment;
	}

	public boolean isCreateLineSeparator() {
		return createLineSeparator;
	}

	public void setCreateLineSeparator(boolean separateLines) {
		this.createLineSeparator = separateLines;
	}

	public boolean isCreateIndent() {
		return createIndent;
	}

	public void setCreateIndent(boolean createIndent) {
		this.createIndent = createIndent;
	}
}