| /******************************************************************************* |
| * Copyright (c) 2008 Angelo Zerr 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: |
| * Angelo Zerr <angelo.zerr@gmail.com> - initial API and implementation |
| * IBM Corporation |
| * Kai Toedter - added radial gradient support |
| *******************************************************************************/ |
| package org.eclipse.e4.ui.css.swt.helpers; |
| |
| import java.util.List; |
| |
| import org.eclipse.e4.ui.css.core.css2.CSS2ColorHelper; |
| import org.eclipse.e4.ui.css.core.css2.CSS2RGBColorImpl; |
| import org.eclipse.e4.ui.css.core.dom.properties.Gradient; |
| import org.eclipse.e4.ui.css.core.engine.CSSEngine; |
| import org.eclipse.e4.ui.css.core.resources.CSSResourcesHelpers; |
| import org.eclipse.e4.ui.css.core.resources.IResourcesRegistry; |
| import org.eclipse.swt.graphics.Color; |
| import org.eclipse.swt.graphics.RGB; |
| import org.eclipse.swt.widgets.Display; |
| import org.w3c.dom.css.CSSPrimitiveValue; |
| import org.w3c.dom.css.CSSValue; |
| import org.w3c.dom.css.CSSValueList; |
| import org.w3c.dom.css.RGBColor; |
| |
| public class CSSSWTColorHelper { |
| |
| /*--------------- SWT Color Helper -----------------*/ |
| |
| public static Color getSWTColor(RGBColor rgbColor, Display display) { |
| RGB rgb = getRGB(rgbColor); |
| return new Color(display, rgb); |
| } |
| |
| public static Color getSWTColor(CSSValue value, Display display) { |
| if (value.getCssValueType() != CSSValue.CSS_PRIMITIVE_VALUE) { |
| return null; |
| } |
| RGB rgb = getRGB((CSSPrimitiveValue) value); |
| if (rgb == null) { |
| return null; |
| } |
| Color color = new Color(display, rgb.red, rgb.green, rgb.blue); |
| return color; |
| } |
| |
| public static RGB getRGB(String name) { |
| RGBColor color = CSS2ColorHelper.getRGBColor(name); |
| if (color != null) { |
| return getRGB(color); |
| } |
| return null; |
| } |
| |
| public static RGB getRGB(RGBColor color) { |
| return new RGB((int) color.getRed().getFloatValue( |
| CSSPrimitiveValue.CSS_NUMBER), (int) color.getGreen() |
| .getFloatValue(CSSPrimitiveValue.CSS_NUMBER), (int) color |
| .getBlue().getFloatValue(CSSPrimitiveValue.CSS_NUMBER)); |
| } |
| |
| public static RGB getRGB(CSSValue value) { |
| if (value.getCssValueType() != CSSValue.CSS_PRIMITIVE_VALUE) { |
| return null; |
| } |
| return getRGB((CSSPrimitiveValue) value); |
| } |
| |
| public static RGB getRGB(CSSPrimitiveValue value) { |
| RGB rgb = null; |
| switch (value.getPrimitiveType()) { |
| case CSSPrimitiveValue.CSS_IDENT: |
| case CSSPrimitiveValue.CSS_STRING: |
| String string = value.getStringValue(); |
| rgb = getRGB(string); |
| break; |
| case CSSPrimitiveValue.CSS_RGBCOLOR: |
| RGBColor rgbColor = value.getRGBColorValue(); |
| rgb = getRGB(rgbColor); |
| break; |
| } |
| return rgb; |
| } |
| |
| public static Integer getPercent(CSSPrimitiveValue value) { |
| int percent = 0; |
| switch (value.getPrimitiveType()) { |
| case CSSPrimitiveValue.CSS_PERCENTAGE: |
| percent = (int) value |
| .getFloatValue(CSSPrimitiveValue.CSS_PERCENTAGE); |
| } |
| return new Integer(percent); |
| } |
| |
| public static Gradient getGradient(CSSValueList list) { |
| Gradient gradient = new Gradient(); |
| for (int i = 0; i < list.getLength(); i++) { |
| CSSValue value = list.item(i); |
| if (value.getCssValueType() == CSSValue.CSS_PRIMITIVE_VALUE) { |
| short primType = ((CSSPrimitiveValue) value).getPrimitiveType(); |
| |
| if (primType == CSSPrimitiveValue.CSS_IDENT) { |
| if (value.getCssText().equals("gradient")) { |
| // Skip the keyword "gradient" |
| continue; |
| } else if (value.getCssText().equals("linear")) { |
| gradient.setLinear(true); |
| continue; |
| } else if (value.getCssText().equals("radial")) { |
| gradient.setLinear(false); |
| continue; |
| } |
| } |
| |
| switch (primType) { |
| case CSSPrimitiveValue.CSS_IDENT: |
| case CSSPrimitiveValue.CSS_STRING: |
| case CSSPrimitiveValue.CSS_RGBCOLOR: |
| RGB rgb = getRGB((CSSPrimitiveValue) value); |
| if (rgb != null) { |
| gradient.addRGB(rgb, (CSSPrimitiveValue) value); |
| } |
| break; |
| case CSSPrimitiveValue.CSS_PERCENTAGE: |
| gradient.addPercent(getPercent((CSSPrimitiveValue) value)); |
| break; |
| } |
| } |
| } |
| return gradient; |
| } |
| |
| public static Color[] getSWTColors(Gradient grad, Display display, CSSEngine engine) { |
| List values = grad.getValues(); |
| IResourcesRegistry registry = engine.getResourcesRegistry(); |
| Color[] colors = new Color[values.size()]; |
| |
| for (int i = 0; i < values.size(); i++) { |
| CSSPrimitiveValue value = (CSSPrimitiveValue) values.get(i); |
| //We rely on the fact that when a gradient is created, it's colors are converted and in the registry |
| //TODO see bug #278077 |
| Color color = (Color) registry.getResource(Color.class, CSSResourcesHelpers.getCSSPrimitiveValueKey(value)); |
| colors[i] = color; |
| } |
| return colors; |
| } |
| |
| public static int[] getPercents(Gradient grad) { |
| // There should be exactly one more RGBs. than percent, |
| // in which case just return the percents as array |
| if (grad.getRGBs().size() == grad.getPercents().size() + 1) { |
| int[] percents = new int[grad.getPercents().size()]; |
| for (int i = 0; i < percents.length; i++) { |
| int value = ((Integer) grad.getPercents().get(i)).intValue(); |
| if (value < 0 || value > 100) { |
| // TODO this should be an exception because bad source |
| // format |
| return getDefaultPercents(grad); |
| } |
| percents[i] = value; |
| } |
| return percents; |
| } else { |
| // We can get here if either: |
| // A: the percents are empty (legal) or |
| // B: size mismatches (error) |
| // TODO this should be an exception because bad source format |
| |
| return getDefaultPercents(grad); |
| } |
| } |
| |
| /* |
| * Compute and return a default array of percentages based on number of |
| * colors o If two colors, {100} o if three colors, {50, 100} o if four |
| * colors, {33, 67, 100} |
| */ |
| private static int[] getDefaultPercents(Gradient grad) { |
| // Needed to avoid /0 in increment calc |
| if (grad.getRGBs().size() == 1) { |
| return new int[0]; |
| } |
| |
| int[] percents = new int[grad.getRGBs().size() - 1]; |
| float increment = 100f / (grad.getRGBs().size() - 1); |
| |
| for (int i = 0; i < percents.length; i++) { |
| percents[i] = Math.round((i + 1) * increment); |
| } |
| return percents; |
| } |
| |
| public static RGBColor getRGBColor(Color color) { |
| int red = color.getRed(); |
| int green = color.getGreen(); |
| int blue = color.getBlue(); |
| return new CSS2RGBColorImpl(red, green, blue); |
| } |
| |
| public static RGBColor getRGBColor(RGB color) { |
| int red = color.red; |
| int green = color.green; |
| int blue = color.blue; |
| return new CSS2RGBColorImpl(red, green, blue); |
| } |
| } |