org.eclipse.ui.cheatsheets/src/org/eclipse/ui/internal/cheatsheets/views/CheatSheetPage.java - platform/eclipse.platform.ua - Git at Google

 /*******************************************************************************
  * Copyright (c) 2002, 2017 IBM Corporation and others.
  * 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:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.ui.internal.cheatsheets.views;

 import java.util.ArrayList;
 import java.util.Iterator;

 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.graphics.Color;
 import org.eclipse.swt.graphics.RGB;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Display;
 import org.eclipse.swt.widgets.Menu;
 import org.eclipse.swt.widgets.MenuItem;
 import org.eclipse.ui.forms.FormColors;
 import org.eclipse.ui.forms.HyperlinkGroup;
 import org.eclipse.ui.forms.HyperlinkSettings;
 import org.eclipse.ui.forms.widgets.FormToolkit;
 import org.eclipse.ui.forms.widgets.ScrolledForm;
 import org.eclipse.ui.internal.cheatsheets.CheatSheetPlugin;
 import org.eclipse.ui.internal.cheatsheets.CheatSheetStopWatch;
 import org.eclipse.ui.internal.cheatsheets.ICheatSheetResource;
 import org.eclipse.ui.internal.cheatsheets.Messages;
 import org.eclipse.ui.internal.cheatsheets.actions.IMenuContributor;
 import org.eclipse.ui.internal.cheatsheets.data.CheatSheet;
 import org.eclipse.ui.internal.cheatsheets.data.Item;

 public class CheatSheetPage extends Page implements IMenuContributor {
 	// Colors
 	private Color introColor;
 	private Color activeColor;

 	private Color inactiveColor1;
 	private Color inactiveColor2;

 	private CheatSheet cheatSheet;

 	private ArrayList<ViewItem> viewItemList;

 	private CheatSheetViewer viewer;

 	public CheatSheetPage(CheatSheet cheatSheet, ArrayList<ViewItem> viewItemList,
 			CheatSheetViewer cheatSheetViewer) {
 		super();
 		this.cheatSheet = cheatSheet;
 		this.viewItemList = viewItemList;
 		this.viewer = cheatSheetViewer;
 	}

 	@Override
 	public void createPart(Composite parent) {
 		CheatSheetStopWatch.startStopWatch("CheatSheetPage.createPart()"); //$NON-NLS-1$
 		super.createPart(parent);
 		HyperlinkGroup hyperlinkGroup = toolkit.getHyperlinkGroup();
 		hyperlinkGroup.setHyperlinkUnderlineMode(HyperlinkSettings.UNDERLINE_HOVER);

 		CheatSheetStopWatch
 				.printLapTime(
 						"CheatSheetPage.createPart()", "Time in CheatSheetPage.createInfoArea() after super.createInfoArea(): "); //$NON-NLS-1$ //$NON-NLS-2$
 		IntroItem intro = new IntroItem(this, cheatSheet.getIntroItem(),
 				introColor, viewer);
 		CheatSheetStopWatch
 				.printLapTime(
 						"CheatSheetPage.createPart()", "Time in CheatSheetPage.createInfoArea() after new IntroItem(): "); //$NON-NLS-1$ //$NON-NLS-2$

 		intro.setBold(true);
 		viewItemList.add(intro);

 		CheatSheetStopWatch
 				.printLapTime(
 						"CheatSheetPage.createInfoArea()", "Time in CheatSheetPage.createPart() before add loop: "); //$NON-NLS-1$ //$NON-NLS-2$
 		// Get the content info from the parser. This makes up all items except
 		// the intro item.
 		ArrayList<Item> items = cheatSheet.getItems();
 		for (int i = 0; i < items.size(); i++) {
 			Color color = (i % 2) == 0 ? getInactiveColor1() : getInactiveColor2();

 			CoreItem coreItem = new CoreItem(this, items.get(i), color, viewer);
 			viewItemList.add(coreItem);
 		}
 		CheatSheetStopWatch
 				.printLapTime(
 						"CheatSheetPage.createInfoArea()", "Time in CheatSheetPage.createPart(): "); //$NON-NLS-1$ //$NON-NLS-2$
 	}

 	private Color getInactiveColor2() {
 		return inactiveColor2;
 	}

 	private Color getInactiveColor1() {
 		return inactiveColor1;
 	}

 	/**
 	 * Creates the cheatsheet's title areawhich will consists of a title and
 	 * image.
 	 *
 	 * @param parent
 	 *            the SWT parent for the title area composite
 	 */
 	@Override
 	protected String getTitle() {
 		if (cheatSheet != null && cheatSheet.getTitle() != null)
 			return cheatSheet.getTitle();
 		return ICheatSheetResource.EMPTY_STRING;
 	}

 	@Override
 	public void dispose() {
 		super.dispose();

 		if (getInactiveColor1() != null)
 			getInactiveColor1().dispose();
 		if (getInactiveColor2() != null)
 			getInactiveColor2().dispose();

 		if (activeColor != null)
 			activeColor.dispose();

 		if (introColor != null)
 			introColor.dispose();
 		inactiveColor1 = null;
 		inactiveColor2 = null;
 		activeColor = null;
 		introColor = null;
 	}

 	@Override
 	protected void init(Display display) {
 		super.init(display);
 		computeColors(display);
 	}

 	private void computeColors(Display display) {
 		RGB rgb;
 		RGB white = new RGB(255, 255, 255);
 		RGB black = new RGB(0, 0, 0);

 		if (isReverseVideo()) {
 			computeReverseVideoColors(display);
 			return;
 		}

 		if (toolkit.getColors().isWhiteBackground()) {
 			rgb = toolkit.getColors().getSystemColor(SWT.COLOR_LIST_SELECTION);
 			// active color is selection + 80% white
 			rgb = FormColors.blend(rgb, white, 20);
 			// test for bounds
 			if (FormColors.testTwoPrimaryColors(rgb, 245, 256)) {
 				// too bright - tone down 20%
 				rgb = FormColors.blend(rgb, black, 80);
 			} else if (FormColors.testAnyPrimaryColor(rgb, 170, 191)) {
 				// too dark - brighten 15%
 				rgb = FormColors.blend(rgb, white, 85);
 			} else if (FormColors.testAnyPrimaryColor(rgb, 190, 215)) {
 				// too dark - brighten 10%
 				rgb = FormColors.blend(rgb, white, 90);
 			}
 			// final check - if gray
 			if (Math.abs(rgb.blue-rgb.green) <5 &&
 					Math.abs(rgb.blue-rgb.red)<5 &&
 					Math.abs(rgb.green-rgb.red)<5) {
 				// blend with blue
 				rgb = FormColors.blend(rgb, new RGB(100, 100, 255), 90);
 			}
 			introColor = new Color(display, rgb);
 			inactiveColor2 = new Color(display, rgb);
 		} else {
 			// colored background
 			rgb = toolkit.getColors().getSystemColor(SWT.COLOR_LIST_SELECTION);
 			// active color is selection + 70% white
 			rgb = FormColors.blend(rgb, white, 30);
 			// If these values are in the range of 201 to 220, then decrease
 			// white by 20%
 			if (FormColors.testTwoPrimaryColors(rgb, 200, 221))
 				rgb = FormColors.blend(rgb, black, 80);
 			// If these values are in the range of 221 to 240, then decrease
 			// white by 40%
 			else if (FormColors.testTwoPrimaryColors(rgb, 222, 241))
 				rgb = FormColors.blend(rgb, black, 60);
 			// If these values are in the range of 241 to 255, then decrease
 			// white by 70%
 			else if (FormColors.testTwoPrimaryColors(rgb, 240, 256))
 				rgb = FormColors.blend(rgb, black, 30);
 			introColor = new Color(display, rgb);
 			inactiveColor2 = new Color(display, rgb);
 		}
 		rgb = inactiveColor2.getRGB();
 		rgb = FormColors.blend(rgb, backgroundColor.getRGB(), 40);
 		inactiveColor1 = new Color(display, rgb);
 		activeColor = new Color(display, backgroundColor.getRGB());
 	}

 	private void computeReverseVideoColors(Display display) {
         Color background = toolkit.getColors().getBackground();
 		RGB white = new RGB(255, 255, 255);
         // Create new colors, they will get disposed
         RGB rgb = background.getRGB();
 		activeColor = new Color(display, rgb );
 		rgb = FormColors.blend(rgb, white, 85);
 		inactiveColor1 = new Color(display, rgb);
 		rgb = FormColors.blend(rgb, white, 85);
 		inactiveColor2 = new Color(display, rgb );
         introColor = new Color(display, rgb );
 	}

 	private boolean isReverseVideo() {
         Color bg = toolkit.getColors().getBackground();
 		return ((bg.getBlue() + bg.getRed() + bg.getGreen()) < 380);
 	}

 	@Override
 	public void initialized() {
 		for (Iterator<ViewItem> iter = viewItemList.iterator(); iter.hasNext();) {
 			ViewItem item = iter.next();
 			item.initialized();
 		}
 	}

 	public Color getActiveColor() {
 		return activeColor;
 	}

 	public ScrolledForm getForm() {
 		return form;
 	}

 	public FormToolkit getToolkit() {
 		return toolkit;
 	}

 	private int contributeRestartItem(Menu menu, int index) {
 		MenuItem item = new MenuItem(menu, SWT.PUSH, index++);
 		item.setText(Messages.RESTART_MENU);
 		item.setImage(CheatSheetPlugin.getPlugin().getImage(ICheatSheetResource.CHEATSHEET_RETURN));

 		item.addSelectionListener(new SelectionAdapter() {
 			@Override
 			public void widgetSelected(SelectionEvent e) {
 				viewer.restart();
 			}
 		});
 		return index;
 	}

 	@Override
 	public int contributeToViewMenu(Menu menu, int index) {
 		return contributeRestartItem(menu, index);
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2002, 2017 IBM Corporation and others.
	* 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:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.ui.internal.cheatsheets.views;

	import java.util.ArrayList;
	import java.util.Iterator;

	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.SelectionAdapter;
	import org.eclipse.swt.events.SelectionEvent;
	import org.eclipse.swt.graphics.Color;
	import org.eclipse.swt.graphics.RGB;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Display;
	import org.eclipse.swt.widgets.Menu;
	import org.eclipse.swt.widgets.MenuItem;
	import org.eclipse.ui.forms.FormColors;
	import org.eclipse.ui.forms.HyperlinkGroup;
	import org.eclipse.ui.forms.HyperlinkSettings;
	import org.eclipse.ui.forms.widgets.FormToolkit;
	import org.eclipse.ui.forms.widgets.ScrolledForm;
	import org.eclipse.ui.internal.cheatsheets.CheatSheetPlugin;
	import org.eclipse.ui.internal.cheatsheets.CheatSheetStopWatch;
	import org.eclipse.ui.internal.cheatsheets.ICheatSheetResource;
	import org.eclipse.ui.internal.cheatsheets.Messages;
	import org.eclipse.ui.internal.cheatsheets.actions.IMenuContributor;
	import org.eclipse.ui.internal.cheatsheets.data.CheatSheet;
	import org.eclipse.ui.internal.cheatsheets.data.Item;

	public class CheatSheetPage extends Page implements IMenuContributor {
	// Colors
	private Color introColor;
	private Color activeColor;

	private Color inactiveColor1;
	private Color inactiveColor2;

	private CheatSheet cheatSheet;

	private ArrayList<ViewItem> viewItemList;

	private CheatSheetViewer viewer;

	public CheatSheetPage(CheatSheet cheatSheet, ArrayList<ViewItem> viewItemList,
	CheatSheetViewer cheatSheetViewer) {
	super();
	this.cheatSheet = cheatSheet;
	this.viewItemList = viewItemList;
	this.viewer = cheatSheetViewer;
	}

	@Override
	public void createPart(Composite parent) {
	CheatSheetStopWatch.startStopWatch("CheatSheetPage.createPart()"); //$NON-NLS-1$
	super.createPart(parent);
	HyperlinkGroup hyperlinkGroup = toolkit.getHyperlinkGroup();
	hyperlinkGroup.setHyperlinkUnderlineMode(HyperlinkSettings.UNDERLINE_HOVER);

	CheatSheetStopWatch
	.printLapTime(
	"CheatSheetPage.createPart()", "Time in CheatSheetPage.createInfoArea() after super.createInfoArea(): "); //$NON-NLS-1$ //$NON-NLS-2$
	IntroItem intro = new IntroItem(this, cheatSheet.getIntroItem(),
	introColor, viewer);
	CheatSheetStopWatch
	.printLapTime(
	"CheatSheetPage.createPart()", "Time in CheatSheetPage.createInfoArea() after new IntroItem(): "); //$NON-NLS-1$ //$NON-NLS-2$

	intro.setBold(true);
	viewItemList.add(intro);

	CheatSheetStopWatch
	.printLapTime(
	"CheatSheetPage.createInfoArea()", "Time in CheatSheetPage.createPart() before add loop: "); //$NON-NLS-1$ //$NON-NLS-2$
	// Get the content info from the parser. This makes up all items except
	// the intro item.
	ArrayList<Item> items = cheatSheet.getItems();
	for (int i = 0; i < items.size(); i++) {
	Color color = (i % 2) == 0 ? getInactiveColor1() : getInactiveColor2();

	CoreItem coreItem = new CoreItem(this, items.get(i), color, viewer);
	viewItemList.add(coreItem);
	}
	CheatSheetStopWatch
	.printLapTime(
	"CheatSheetPage.createInfoArea()", "Time in CheatSheetPage.createPart(): "); //$NON-NLS-1$ //$NON-NLS-2$
	}

	private Color getInactiveColor2() {
	return inactiveColor2;
	}

	private Color getInactiveColor1() {
	return inactiveColor1;
	}

	/**
	* Creates the cheatsheet's title areawhich will consists of a title and
	* image.
	*
	* @param parent
	* the SWT parent for the title area composite
	*/
	@Override
	protected String getTitle() {
	if (cheatSheet != null && cheatSheet.getTitle() != null)
	return cheatSheet.getTitle();
	return ICheatSheetResource.EMPTY_STRING;
	}

	@Override
	public void dispose() {
	super.dispose();

	if (getInactiveColor1() != null)
	getInactiveColor1().dispose();
	if (getInactiveColor2() != null)
	getInactiveColor2().dispose();

	if (activeColor != null)
	activeColor.dispose();

	if (introColor != null)
	introColor.dispose();
	inactiveColor1 = null;
	inactiveColor2 = null;
	activeColor = null;
	introColor = null;
	}

	@Override
	protected void init(Display display) {
	super.init(display);
	computeColors(display);
	}

	private void computeColors(Display display) {
	RGB rgb;
	RGB white = new RGB(255, 255, 255);
	RGB black = new RGB(0, 0, 0);

	if (isReverseVideo()) {
	computeReverseVideoColors(display);
	return;
	}

	if (toolkit.getColors().isWhiteBackground()) {
	rgb = toolkit.getColors().getSystemColor(SWT.COLOR_LIST_SELECTION);
	// active color is selection + 80% white
	rgb = FormColors.blend(rgb, white, 20);
	// test for bounds
	if (FormColors.testTwoPrimaryColors(rgb, 245, 256)) {
	// too bright - tone down 20%
	rgb = FormColors.blend(rgb, black, 80);
	} else if (FormColors.testAnyPrimaryColor(rgb, 170, 191)) {
	// too dark - brighten 15%
	rgb = FormColors.blend(rgb, white, 85);
	} else if (FormColors.testAnyPrimaryColor(rgb, 190, 215)) {
	// too dark - brighten 10%
	rgb = FormColors.blend(rgb, white, 90);
	}
	// final check - if gray
	if (Math.abs(rgb.blue-rgb.green) <5 &&
	Math.abs(rgb.blue-rgb.red)<5 &&
	Math.abs(rgb.green-rgb.red)<5) {
	// blend with blue
	rgb = FormColors.blend(rgb, new RGB(100, 100, 255), 90);
	}
	introColor = new Color(display, rgb);
	inactiveColor2 = new Color(display, rgb);
	} else {
	// colored background
	rgb = toolkit.getColors().getSystemColor(SWT.COLOR_LIST_SELECTION);
	// active color is selection + 70% white
	rgb = FormColors.blend(rgb, white, 30);
	// If these values are in the range of 201 to 220, then decrease
	// white by 20%
	if (FormColors.testTwoPrimaryColors(rgb, 200, 221))
	rgb = FormColors.blend(rgb, black, 80);
	// If these values are in the range of 221 to 240, then decrease
	// white by 40%
	else if (FormColors.testTwoPrimaryColors(rgb, 222, 241))
	rgb = FormColors.blend(rgb, black, 60);
	// If these values are in the range of 241 to 255, then decrease
	// white by 70%
	else if (FormColors.testTwoPrimaryColors(rgb, 240, 256))
	rgb = FormColors.blend(rgb, black, 30);
	introColor = new Color(display, rgb);
	inactiveColor2 = new Color(display, rgb);
	}
	rgb = inactiveColor2.getRGB();
	rgb = FormColors.blend(rgb, backgroundColor.getRGB(), 40);
	inactiveColor1 = new Color(display, rgb);
	activeColor = new Color(display, backgroundColor.getRGB());
	}

	private void computeReverseVideoColors(Display display) {
	Color background = toolkit.getColors().getBackground();
	RGB white = new RGB(255, 255, 255);
	// Create new colors, they will get disposed
	RGB rgb = background.getRGB();
	activeColor = new Color(display, rgb );
	rgb = FormColors.blend(rgb, white, 85);
	inactiveColor1 = new Color(display, rgb);
	rgb = FormColors.blend(rgb, white, 85);
	inactiveColor2 = new Color(display, rgb );
	introColor = new Color(display, rgb );
	}

	private boolean isReverseVideo() {
	Color bg = toolkit.getColors().getBackground();
	return ((bg.getBlue() + bg.getRed() + bg.getGreen()) < 380);
	}

	@Override
	public void initialized() {
	for (Iterator<ViewItem> iter = viewItemList.iterator(); iter.hasNext();) {
	ViewItem item = iter.next();
	item.initialized();
	}
	}

	public Color getActiveColor() {
	return activeColor;
	}

	public ScrolledForm getForm() {
	return form;
	}

	public FormToolkit getToolkit() {
	return toolkit;
	}

	private int contributeRestartItem(Menu menu, int index) {
	MenuItem item = new MenuItem(menu, SWT.PUSH, index++);
	item.setText(Messages.RESTART_MENU);
	item.setImage(CheatSheetPlugin.getPlugin().getImage(ICheatSheetResource.CHEATSHEET_RETURN));

	item.addSelectionListener(new SelectionAdapter() {
	@Override
	public void widgetSelected(SelectionEvent e) {
	viewer.restart();
	}
	});
	return index;
	}

	@Override
	public int contributeToViewMenu(Menu menu, int index) {
	return contributeRestartItem(menu, index);
	}
	}