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/******************************************************************************* |
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* Copyright (c) 2007 IBM Corporation and others. |
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* All rights reserved. This program and the accompanying materials |
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* are made available under the terms of the Eclipse Public License v1.0 |
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* which accompanies this distribution, and is available at |
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* http://www.eclipse.org/legal/epl-v10.html |
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* |
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* Contributors: |
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* IBM Corporation - initial API and implementation |
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******************************************************************************/ |
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package org.eclipse.ui.internal.themes; |
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import java.util.Hashtable; |
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import org.eclipse.core.runtime.IConfigurationElement; |
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import org.eclipse.core.runtime.IExecutableExtension; |
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import org.eclipse.swt.graphics.RGB; |
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import org.eclipse.ui.themes.ColorUtil; |
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import org.eclipse.ui.themes.IColorFactory; |
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|
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/** |
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* LightColorFactory returns tab begin and end colours based on taking |
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* a system color as input, analyzing it, and lightening it appropriately. |
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* |
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* @since 3.3 |
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* |
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*/ |
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public class LightColorFactory implements IColorFactory, |
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IExecutableExtension { |
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protected static final RGB white = new RGB(255, 255, 255); |
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String baseColorName; |
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String definitionId; |
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/** |
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* This executable extension requires parameters to be explicitly declared |
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* via the second method described in the <code>IExecutableExtension</code> |
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* documentation. The following parameters are parsed: |
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* <code>base</code>, describes the base color to produce all other colours from. |
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* This value may either be an RGB triple or an SWT constant. |
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* <code>definitionId</code>, describes the id of color we are looking for, one of |
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* "org.eclipse.ui.workbench.ACTIVE_TAB_BG_START" |
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* "org.eclipse.ui.workbench.ACTIVE_TAB_BG_END" |
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* @see org.eclipse.core.runtime.IExecutableExtension#setInitializationData(org.eclipse.core.runtime.IConfigurationElement, |
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* java.lang.String, java.lang.Object) |
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*/ |
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public void setInitializationData(IConfigurationElement config, |
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String propertyName, Object data) { |
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|
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if (data instanceof Hashtable) { |
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Hashtable table = (Hashtable) data; |
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baseColorName = (String) table.get("base"); //$NON-NLS-1$ |
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definitionId = (String) table.get("definitionId"); //$NON-NLS-1$ |
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} |
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} |
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|
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/* |
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* Return the number of RGB values in test that are |
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* equal to or between lower and upper. |
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*/ |
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protected int valuesInRange(RGB test, int lower, int upper) { |
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int hits = 0; |
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if(test.red >= lower && test.red <= upper) hits++; |
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if(test.blue >= lower && test.blue <= upper) hits++; |
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if(test.green >= lower && test.green <= upper) hits++; |
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return hits; |
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} |
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|
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/* |
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* Return the RGB value for the bottom tab color |
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* based on a blend of white and sample color |
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*/ |
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private RGB getLightenedColor(RGB sample) { |
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//Group 1 |
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if(valuesInRange(sample, 180, 255) >= 2) |
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return sample; |
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|
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//Group 2 |
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if(valuesInRange(sample, 100, 179) >= 2) |
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return ColorUtil.blend(white, sample, 30); |
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|
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//Group 3 |
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if(valuesInRange(sample, 0, 99) >= 2) |
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return ColorUtil.blend(white, sample, 60); |
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|
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//Group 4 |
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return ColorUtil.blend(white, sample, 30); |
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} |
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/* |
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* Return the Start (top of tab) color as an RGB |
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*/ |
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private RGB createStartColor() { |
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return ColorUtil.blend(white, createEndColor(), 75); |
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} |
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/* |
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* Return the End (top of tab) color as an RGB |
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*/ |
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private RGB createEndColor() { |
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return getLightenedColor( |
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ColorUtil.getColorValue(baseColorName)); |
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} |
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/* |
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* (non-Javadoc) |
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* |
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* @see org.eclipse.ui.themes.IColorFactory#createColor() |
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*/ |
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public RGB createColor() { |
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//should have base, otherwise error in the xml |
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if (baseColorName == null || definitionId == null) |
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return white; |
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if (definitionId.equals("org.eclipse.ui.workbench.ACTIVE_TAB_BG_START")) //$NON-NLS-1$ |
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return createStartColor(); |
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if (definitionId.equals("org.eclipse.ui.workbench.ACTIVE_TAB_BG_END")) //$NON-NLS-1$ |
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return createEndColor(); |
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//should be one of start or end, otherwise error in the xml |
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return white; |
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} |
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} |
