visualizer/org.eclipse.cdt.visualizer.examples/src/org/eclipse/cdt/visualizer/examples/sourcegraph/SourceGraphControl.java - cdt/org.eclipse.cdt - Git at Google

 /*******************************************************************************
  * Copyright (c) 2012, 2015 Tilera Corporation and others.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
  * which accompanies this distribution, and is available at
  * https://www.eclipse.org/legal/epl-2.0/
  *
  * SPDX-License-Identifier: EPL-2.0
  *
  * Contributors:
  *     William R. Swanson (Tilera Corporation)
  *     Marc Dumais (Ericsson) - Bug 458671
  *******************************************************************************/

 package org.eclipse.cdt.visualizer.examples.sourcegraph;

 import java.io.File;
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.net.URISyntaxException;
 import java.net.URL;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Hashtable;

 import org.eclipse.cdt.visualizer.examples.VisualizerExamplesPlugin;
 import org.eclipse.cdt.visualizer.ui.canvas.BufferedCanvas;
 import org.eclipse.cdt.visualizer.ui.canvas.GraphicObject;
 import org.eclipse.cdt.visualizer.ui.util.Colors;
 import org.eclipse.core.runtime.FileLocator;
 import org.eclipse.core.runtime.Platform;
 import org.eclipse.swt.graphics.Color;
 import org.eclipse.swt.graphics.GC;
 import org.eclipse.swt.graphics.Rectangle;
 import org.eclipse.swt.widgets.Composite;
 import org.osgi.framework.Bundle;

 // ---------------------------------------------------------------------------
 // SourceGraphControl
 // ---------------------------------------------------------------------------

 /** Simple control that displays a graph based on a source text selection. */
 public class SourceGraphControl extends BufferedCanvas {
 	// --- constants ---

 	/** Margin used in drawing graph and computing control height. */
 	public static final int MARGIN = 10;

 	/** Line height used in drawing graph and computing control height. */
 	public static final int LINE_HEIGHT = 20;

 	/** Path for the banner image, relative to plug-in root path */
 	protected static final String BANNER_FILE = "images/sgv-banner.png"; //$NON-NLS-1$
 	protected static final int BANNER_HEIGHT = 50;

 	// --- members ---

 	/** Text we're currently displaying. */
 	protected String m_sourceText = ""; //$NON-NLS-1$

 	protected GraphicObject m_banner;

 	/** Data structure used to hold character stats. */
 	class CharStat implements Comparable<CharStat> {
 		public String characters;
 		public int count;

 		public CharStat(String c) {
 			characters = c;
 			count = 0;
 		}

 		@Override
 		public int compareTo(CharStat o) {
 			int c1 = count;
 			int c2 = o.count;
 			int cmp = (c1 < c2) ? -1 : (c1 > c2) ? 1 : 0;
 			// we want to sort in descending order, so negate result
 			return -cmp;
 		}
 	}

 	/** List of characters we discovered and their occurrences. */
 	ArrayList<CharStat> m_characters;

 	// --- constructors/destructors ---

 	/** Constructor. */
 	public SourceGraphControl(Composite parent) {
 		super(parent);
 		m_characters = new ArrayList<>();
 		m_banner = new GraphicObject();
 	}

 	/** Dispose method. */
 	@Override
 	public void dispose() {
 		super.dispose();
 	}

 	// --- accessors ---

 	/** Sets source text to graph. */
 	public void setSourceText(String text) {
 		processText(text);
 		SourceGraphControl.this.update();
 	}

 	// --- text processing methods ---

 	/** Processes text into digested display form. */
 	public void processText(String text) {
 		if (text == null)
 			text = ""; //$NON-NLS-1$
 		m_sourceText = text;

 		// TODO: reuse the array/hashtable and stat objects

 		Hashtable<String, CharStat> characters = new Hashtable<>();

 		int len = m_sourceText.length();
 		int fragment_length = 2;
 		if (len >= fragment_length) {
 			for (int i = 0; i < len - fragment_length + 1; ++i) {
 				String c = m_sourceText.substring(i, i + fragment_length);

 				// Don't bother with fragments containing spaces
 				// and non-printing chars.
 				boolean skip = false;
 				for (int j = 0; j < c.length(); ++j) {
 					if (c.charAt(j) <= 32 || c.charAt(j) > 127) {
 						skip = true;
 						break;
 					}
 				}
 				if (skip)
 					continue;

 				CharStat cs = characters.get(c);
 				if (cs == null) {
 					cs = new CharStat(c);
 					characters.put(c, cs);
 				}
 				++cs.count;
 			}
 		}

 		m_characters.clear();
 		m_characters.addAll(characters.values());
 		Collections.sort(m_characters);

 		characters.clear();

 		Rectangle bounds = getBounds();
 		int height = MARGIN * 2 + m_characters.size() * LINE_HEIGHT;

 		// reserve space for banner at the top
 		height = height + BANNER_HEIGHT;

 		bounds.height = height;
 		setBounds(bounds);

 	}

 	// --- painting methods ---

 	/** Invoked when canvas repaint event is raised.
 	 *  Default implementation clears canvas to background color.
 	 */
 	@Override
 	public void paintCanvas(GC gc) {
 		gc.setBackground(Colors.BLACK);
 		gc.setForeground(Colors.WHITE);

 		clearCanvas(gc);

 		int margin = MARGIN;
 		int tw = 90;
 		int tw2 = 45;
 		int lh = LINE_HEIGHT;

 		int x = margin;
 		// skip banner space
 		int y = BANNER_HEIGHT + margin;

 		Rectangle area = getClientArea();
 		int w = area.width - margin * 2 - tw;

 		// position and size banner container object
 		m_banner.setBounds(new Rectangle(x - margin, margin, area.width, BANNER_HEIGHT - margin));

 		// draw banner
 		try {
 			m_banner.drawImage(gc, getAbsFilePath(BANNER_FILE), GraphicObject.ImageSizeAndPosition.MAXSIZE);
 		} catch (FileNotFoundException e) {
 			e.printStackTrace();
 		}

 		int maxcount = 0;
 		for (CharStat cs : m_characters) {
 			// We're sorted in descending order, so first element
 			// that we draw will always have the largest count.
 			if (maxcount == 0)
 				maxcount = cs.count;

 			gc.drawText("[" + cs.characters + "]", x, y); //$NON-NLS-1$ //$NON-NLS-2$
 			gc.drawText("(" + cs.count + ")", x + tw2, y); //$NON-NLS-1$ //$NON-NLS-2$

 			double proportion = cs.count * 1.0 / maxcount;
 			int bw = (int) Math.round(proportion * w);
 			Color oldb = gc.getBackground();
 			if (proportion > .70)
 				gc.setBackground(Colors.GREEN);
 			else if (proportion > .40)
 				gc.setBackground(Colors.YELLOW);
 			else
 				gc.setBackground(Colors.RED);
 			gc.fillRectangle(x + tw, y, bw, lh - 5);
 			gc.setBackground(oldb);

 			y += lh;
 		}
 	}

 	// --- update methods ---

 	/**
 	 * Refresh the control's content based on current data.
 	 */
 	public void refresh() {
 		SourceGraphControl.this.update();
 	}

 	// --- event handlers ---

 	/** Invoked when panel is resized. */
 	@Override
 	public void resized(Rectangle bounds) {
 		refresh();
 	}

 	/** Get the absolute path of a file, from the path relative to plugin root. */
 	private String getAbsFilePath(String relPath) {
 		Bundle bundle = Platform.getBundle(VisualizerExamplesPlugin.PLUGIN_ID);
 		URL fileURL = bundle.getEntry(relPath);
 		File file = null;

 		try {
 			file = new File(FileLocator.resolve(fileURL).toURI());
 		} catch (URISyntaxException | IOException e) {
 			// TODO Auto-generated catch block
 			e.printStackTrace();
 		}
 		return file.getAbsolutePath();
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2012, 2015 Tilera Corporation and others.
	*
	* This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License 2.0
	* which accompanies this distribution, and is available at
	* https://www.eclipse.org/legal/epl-2.0/
	*
	* SPDX-License-Identifier: EPL-2.0
	*
	* Contributors:
	* William R. Swanson (Tilera Corporation)
	* Marc Dumais (Ericsson) - Bug 458671
	*******************************************************************************/

	package org.eclipse.cdt.visualizer.examples.sourcegraph;

	import java.io.File;
	import java.io.FileNotFoundException;
	import java.io.IOException;
	import java.net.URISyntaxException;
	import java.net.URL;
	import java.util.ArrayList;
	import java.util.Collections;
	import java.util.Hashtable;

	import org.eclipse.cdt.visualizer.examples.VisualizerExamplesPlugin;
	import org.eclipse.cdt.visualizer.ui.canvas.BufferedCanvas;
	import org.eclipse.cdt.visualizer.ui.canvas.GraphicObject;
	import org.eclipse.cdt.visualizer.ui.util.Colors;
	import org.eclipse.core.runtime.FileLocator;
	import org.eclipse.core.runtime.Platform;
	import org.eclipse.swt.graphics.Color;
	import org.eclipse.swt.graphics.GC;
	import org.eclipse.swt.graphics.Rectangle;
	import org.eclipse.swt.widgets.Composite;
	import org.osgi.framework.Bundle;

	// ---------------------------------------------------------------------------
	// SourceGraphControl
	// ---------------------------------------------------------------------------

	/** Simple control that displays a graph based on a source text selection. */
	public class SourceGraphControl extends BufferedCanvas {
	// --- constants ---

	/** Margin used in drawing graph and computing control height. */
	public static final int MARGIN = 10;

	/** Line height used in drawing graph and computing control height. */
	public static final int LINE_HEIGHT = 20;

	/** Path for the banner image, relative to plug-in root path */
	protected static final String BANNER_FILE = "images/sgv-banner.png"; //$NON-NLS-1$
	protected static final int BANNER_HEIGHT = 50;

	// --- members ---

	/** Text we're currently displaying. */
	protected String m_sourceText = ""; //$NON-NLS-1$

	protected GraphicObject m_banner;

	/** Data structure used to hold character stats. */
	class CharStat implements Comparable<CharStat> {
	public String characters;
	public int count;

	public CharStat(String c) {
	characters = c;
	count = 0;
	}

	@Override
	public int compareTo(CharStat o) {
	int c1 = count;
	int c2 = o.count;
	int cmp = (c1 < c2) ? -1 : (c1 > c2) ? 1 : 0;
	// we want to sort in descending order, so negate result
	return -cmp;
	}
	}

	/** List of characters we discovered and their occurrences. */
	ArrayList<CharStat> m_characters;

	// --- constructors/destructors ---

	/** Constructor. */
	public SourceGraphControl(Composite parent) {
	super(parent);
	m_characters = new ArrayList<>();
	m_banner = new GraphicObject();
	}

	/** Dispose method. */
	@Override
	public void dispose() {
	super.dispose();
	}

	// --- accessors ---

	/** Sets source text to graph. */
	public void setSourceText(String text) {
	processText(text);
	SourceGraphControl.this.update();
	}

	// --- text processing methods ---

	/** Processes text into digested display form. */
	public void processText(String text) {
	if (text == null)
	text = ""; //$NON-NLS-1$
	m_sourceText = text;

	// TODO: reuse the array/hashtable and stat objects

	Hashtable<String, CharStat> characters = new Hashtable<>();

	int len = m_sourceText.length();
	int fragment_length = 2;
	if (len >= fragment_length) {
	for (int i = 0; i < len - fragment_length + 1; ++i) {
	String c = m_sourceText.substring(i, i + fragment_length);

	// Don't bother with fragments containing spaces
	// and non-printing chars.
	boolean skip = false;
	for (int j = 0; j < c.length(); ++j) {
	if (c.charAt(j) <= 32 \|\| c.charAt(j) > 127) {
	skip = true;
	break;
	}
	}
	if (skip)
	continue;

	CharStat cs = characters.get(c);
	if (cs == null) {
	cs = new CharStat(c);
	characters.put(c, cs);
	}
	++cs.count;
	}
	}

	m_characters.clear();
	m_characters.addAll(characters.values());
	Collections.sort(m_characters);

	characters.clear();

	Rectangle bounds = getBounds();
	int height = MARGIN * 2 + m_characters.size() * LINE_HEIGHT;

	// reserve space for banner at the top
	height = height + BANNER_HEIGHT;

	bounds.height = height;
	setBounds(bounds);

	}

	// --- painting methods ---

	/** Invoked when canvas repaint event is raised.
	* Default implementation clears canvas to background color.
	*/
	@Override
	public void paintCanvas(GC gc) {
	gc.setBackground(Colors.BLACK);
	gc.setForeground(Colors.WHITE);

	clearCanvas(gc);

	int margin = MARGIN;
	int tw = 90;
	int tw2 = 45;
	int lh = LINE_HEIGHT;

	int x = margin;
	// skip banner space
	int y = BANNER_HEIGHT + margin;

	Rectangle area = getClientArea();
	int w = area.width - margin * 2 - tw;

	// position and size banner container object
	m_banner.setBounds(new Rectangle(x - margin, margin, area.width, BANNER_HEIGHT - margin));

	// draw banner
	try {
	m_banner.drawImage(gc, getAbsFilePath(BANNER_FILE), GraphicObject.ImageSizeAndPosition.MAXSIZE);
	} catch (FileNotFoundException e) {
	e.printStackTrace();
	}

	int maxcount = 0;
	for (CharStat cs : m_characters) {
	// We're sorted in descending order, so first element
	// that we draw will always have the largest count.
	if (maxcount == 0)
	maxcount = cs.count;

	gc.drawText("[" + cs.characters + "]", x, y); //$NON-NLS-1$ //$NON-NLS-2$
	gc.drawText("(" + cs.count + ")", x + tw2, y); //$NON-NLS-1$ //$NON-NLS-2$

	double proportion = cs.count * 1.0 / maxcount;
	int bw = (int) Math.round(proportion * w);
	Color oldb = gc.getBackground();
	if (proportion > .70)
	gc.setBackground(Colors.GREEN);
	else if (proportion > .40)
	gc.setBackground(Colors.YELLOW);
	else
	gc.setBackground(Colors.RED);
	gc.fillRectangle(x + tw, y, bw, lh - 5);
	gc.setBackground(oldb);

	y += lh;
	}
	}

	// --- update methods ---

	/**
	* Refresh the control's content based on current data.
	*/
	public void refresh() {
	SourceGraphControl.this.update();
	}

	// --- event handlers ---

	/** Invoked when panel is resized. */
	@Override
	public void resized(Rectangle bounds) {
	refresh();
	}

	/** Get the absolute path of a file, from the path relative to plugin root. */
	private String getAbsFilePath(String relPath) {
	Bundle bundle = Platform.getBundle(VisualizerExamplesPlugin.PLUGIN_ID);
	URL fileURL = bundle.getEntry(relPath);
	File file = null;

	try {
	file = new File(FileLocator.resolve(fileURL).toURI());
	} catch (URISyntaxException \| IOException e) {
	// TODO Auto-generated catch block
	e.printStackTrace();
	}
	return file.getAbsolutePath();
	}
	}