org.openlegacy.terminal.render.DefaultRpcImageRenderer.java Source code

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Here is the source code for org.openlegacy.terminal.render.DefaultRpcImageRenderer.java

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/*******************************************************************************
 * Copyright (c) 2012 OpenLegacy Inc.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     OpenLegacy Inc. - initial API and implementation
 *******************************************************************************/
package org.openlegacy.terminal.render;

import org.apache.commons.lang.SystemUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.openlegacy.exceptions.OpenLegacyRuntimeException;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;

import javax.imageio.ImageIO;

public class DefaultRpcImageRenderer implements RpcImageRenderer {

    private final static Log logger = LogFactory.getLog(DefaultRpcImageRenderer.class);

    // default values for bean properties
    private Color imageBackgroundColor = Color.BLACK;
    private Color imageDefaultTextColor = Color.GREEN;
    private Color imageSorroundingTextColor = Color.WHITE;

    private int leftColumnsOffset = 2;
    private int topPixelsOffset = 2;
    private int fontSize = 15;
    private String fontFamily = "Monospaced";
    private boolean drawLineNumbers = true;
    private int widthProportion = 10;
    private int heightProportion = 16;
    private int fontType = Font.BOLD;

    public void render(String source, OutputStream output) {

        BufferedImage buffer;

        int width = 885;
        int height = 550;

        buffer = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);

        if (logger.isDebugEnabled()) {
            logger.debug("Font set to:" + fontFamily);
        }

        Font font = new Font(fontFamily, fontType, fontSize);
        Graphics graphics = buffer.createGraphics();
        graphics.setFont(font);
        setDefaultColor(graphics);

        drawText(source, graphics);

        try {
            ImageIO.write(buffer, "jpg", output);
        } catch (IOException e) {
            throw (new OpenLegacyRuntimeException(e));
        }
    }

    private void drawText(String source, Graphics graphics) {
        String newline = SystemUtils.LINE_SEPARATOR;

        String[] lines = source.split(newline);
        int rowNumber = 1;
        graphics.setColor(imageBackgroundColor);
        for (String line : lines) {
            int startY = toHeight(rowNumber);

            if (drawLineNumbers) {
                // draw row number
                graphics.setColor(imageSorroundingTextColor);
                graphics.drawString(String.valueOf(String.format("%2d", rowNumber)), 0, startY);
            }

            line = line.replaceAll("\t", "  ");
            graphics.drawString(line, 100, startY);
            rowNumber++;
        }
    }

    private void setDefaultColor(Graphics graphics) {
        graphics.setColor(imageDefaultTextColor);
    }

    public int toHeight(int row) {
        return row * heightProportion;
    }

    public int toWidth(int column) {
        return column * widthProportion;
    }

    public String getFileFormat() {
        return "jpg";
    }

    public void setFontFamily(String fontFamily) {
        this.fontFamily = fontFamily;
    }

    public void setDrawLineNumbers(boolean drawLineNumbers) {
        this.drawLineNumbers = drawLineNumbers;
    }

    public void setFontSize(int fontSize) {
        this.fontSize = fontSize;
    }

    public void setHeightProportion(int heightProportion) {
        this.heightProportion = heightProportion;
    }

    public void setWidthProportion(int widthProportion) {
        this.widthProportion = widthProportion;
    }

    public void setLeftColumnsOffset(int leftColumnsOffset) {
        this.leftColumnsOffset = leftColumnsOffset;
    }

    public void setTopPixelsOffset(int topPixelsOffset) {
        this.topPixelsOffset = topPixelsOffset;
    }

    public void setImageBackgroundColor(Color imageBackgroundColor) {
        this.imageBackgroundColor = imageBackgroundColor;
    }

    public void setImageDefaultTextColor(Color imageDefaultTextColor) {
        this.imageDefaultTextColor = imageDefaultTextColor;
    }

    public void setImageSorroundingTextColor(Color imageSorroundingTextColor) {
        this.imageSorroundingTextColor = imageSorroundingTextColor;
    }

    public void setFontType(int fontType) {
        this.fontType = fontType;
    }

    public int getLeftColumnsOffset() {
        return leftColumnsOffset;
    }

    public int getTopPixelsOffset() {
        return topPixelsOffset;
    }

    public double fromHeight(int row) {

        return (double) row / heightProportion;
    }

    public double fromWidth(int col) {
        return (double) col / widthProportion;
    }

}