438 lines
13 KiB
Java
438 lines
13 KiB
Java
/*******************************************************************************
|
|
* Copyright (c) 2011 Google, 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:
|
|
* Google, Inc. - initial API and implementation
|
|
*******************************************************************************/
|
|
package org.eclipse.wb.swt;
|
|
|
|
import java.io.FileInputStream;
|
|
import java.io.IOException;
|
|
import java.io.InputStream;
|
|
import java.util.HashMap;
|
|
import java.util.Map;
|
|
|
|
import org.eclipse.swt.SWT;
|
|
import org.eclipse.swt.graphics.Color;
|
|
import org.eclipse.swt.graphics.Cursor;
|
|
import org.eclipse.swt.graphics.Font;
|
|
import org.eclipse.swt.graphics.FontData;
|
|
import org.eclipse.swt.graphics.GC;
|
|
import org.eclipse.swt.graphics.Image;
|
|
import org.eclipse.swt.graphics.ImageData;
|
|
import org.eclipse.swt.graphics.RGB;
|
|
import org.eclipse.swt.graphics.Rectangle;
|
|
import org.eclipse.swt.widgets.Display;
|
|
|
|
/**
|
|
* Utility class for managing OS resources associated with SWT controls such as
|
|
* colors, fonts, images, etc.
|
|
* <p>
|
|
* !!! IMPORTANT !!! Application code must explicitly invoke the
|
|
* <code>dispose()</code> method to release the operating system resources
|
|
* managed by cached objects when those objects and OS resources are no longer
|
|
* needed (e.g. on application shutdown)
|
|
* <p>
|
|
* This class may be freely distributed as part of any application or plugin.
|
|
* <p>
|
|
*
|
|
* @author scheglov_ke
|
|
* @author Dan Rubel
|
|
*/
|
|
public class SWTResourceManager {
|
|
////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Color
|
|
//
|
|
////////////////////////////////////////////////////////////////////////////
|
|
private static Map<RGB, Color> colorMap = new HashMap<>();
|
|
|
|
private SWTResourceManager() {}
|
|
|
|
/**
|
|
* Returns the system {@link Color} matching the specific ID.
|
|
*
|
|
* @param systemColorID the ID value for the color
|
|
* @return the system {@link Color} matching the specific ID
|
|
*/
|
|
public static Color getColor(int systemColorID) {
|
|
Display display = Display.getCurrent();
|
|
return display.getSystemColor(systemColorID);
|
|
}
|
|
|
|
/**
|
|
* Returns a {@link Color} given its red, green and blue component values.
|
|
*
|
|
* @param r the red component of the color
|
|
* @param g the green component of the color
|
|
* @param b the blue component of the color
|
|
* @return the {@link Color} matching the given red, green and blue component
|
|
* values
|
|
*/
|
|
public static Color getColor(int r, int g, int b) {
|
|
return getColor(new RGB(r, g, b));
|
|
}
|
|
|
|
/**
|
|
* Returns a {@link Color} given its RGB value.
|
|
*
|
|
* @param rgb the {@link RGB} value of the color
|
|
* @return the {@link Color} matching the RGB value
|
|
*/
|
|
public static Color getColor(RGB rgb) {
|
|
return colorMap.computeIfAbsent(rgb, k -> new Color(Display.getCurrent(), rgb));
|
|
}
|
|
|
|
/**
|
|
* Dispose of all the cached {@link Color}'s.
|
|
*/
|
|
public static void disposeColors() {
|
|
for (Color color : colorMap.values()) {
|
|
color.dispose();
|
|
}
|
|
colorMap.clear();
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Image
|
|
//
|
|
////////////////////////////////////////////////////////////////////////////
|
|
/**
|
|
* Maps image paths to images.
|
|
*/
|
|
private static Map<String, Image> imageMap = new HashMap<>();
|
|
|
|
/**
|
|
* Returns an {@link Image} encoded by the specified {@link InputStream}.
|
|
*
|
|
* @param stream the {@link InputStream} encoding the image data
|
|
* @return the {@link Image} encoded by the specified input stream
|
|
*/
|
|
protected static Image getImage(InputStream stream) throws IOException {
|
|
try {
|
|
Display display = Display.getCurrent();
|
|
ImageData data = new ImageData(stream);
|
|
if (data.transparentPixel > 0) {
|
|
return new Image(display, data, data.getTransparencyMask());
|
|
}
|
|
return new Image(display, data);
|
|
} finally {
|
|
stream.close();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns an {@link Image} stored in the file at the specified path.
|
|
*
|
|
* @param path the path to the image file
|
|
* @return the {@link Image} stored in the file at the specified path
|
|
*/
|
|
public static Image getImage(String path) {
|
|
Image image = imageMap.get(path);
|
|
if (image == null) {
|
|
try {
|
|
image = getImage(new FileInputStream(path));
|
|
imageMap.put(path, image);
|
|
} catch (Exception e) {
|
|
image = getMissingImage();
|
|
imageMap.put(path, image);
|
|
}
|
|
}
|
|
return image;
|
|
}
|
|
|
|
/**
|
|
* Returns an {@link Image} stored in the file at the specified path relative to
|
|
* the specified class.
|
|
*
|
|
* @param clazz the {@link Class} relative to which to find the image
|
|
* @param path the path to the image file, if starts with <code>'/'</code>
|
|
* @return the {@link Image} stored in the file at the specified path
|
|
*/
|
|
public static Image getImage(Class<?> clazz, String path) {
|
|
String key = clazz.getName() + '|' + path;
|
|
Image image = imageMap.get(key);
|
|
if (image == null) {
|
|
try {
|
|
image = getImage(clazz.getResourceAsStream(path));
|
|
imageMap.put(key, image);
|
|
} catch (Exception e) {
|
|
image = getMissingImage();
|
|
imageMap.put(key, image);
|
|
}
|
|
}
|
|
return image;
|
|
}
|
|
|
|
private static final int MISSING_IMAGE_SIZE = 10;
|
|
|
|
/**
|
|
* @return the small {@link Image} that can be used as placeholder for missing
|
|
* image.
|
|
*/
|
|
private static Image getMissingImage() {
|
|
Image image = new Image(Display.getCurrent(), MISSING_IMAGE_SIZE, MISSING_IMAGE_SIZE);
|
|
//
|
|
GC gc = new GC(image);
|
|
gc.setBackground(getColor(SWT.COLOR_RED));
|
|
gc.fillRectangle(0, 0, MISSING_IMAGE_SIZE, MISSING_IMAGE_SIZE);
|
|
gc.dispose();
|
|
//
|
|
return image;
|
|
}
|
|
|
|
/**
|
|
* Style constant for placing decorator image in top left corner of base image.
|
|
*/
|
|
public static final int TOP_LEFT = 1;
|
|
/**
|
|
* Style constant for placing decorator image in top right corner of base image.
|
|
*/
|
|
public static final int TOP_RIGHT = 2;
|
|
/**
|
|
* Style constant for placing decorator image in bottom left corner of base
|
|
* image.
|
|
*/
|
|
public static final int BOTTOM_LEFT = 3;
|
|
/**
|
|
* Style constant for placing decorator image in bottom right corner of base
|
|
* image.
|
|
*/
|
|
public static final int BOTTOM_RIGHT = 4;
|
|
/**
|
|
* Internal value.
|
|
*/
|
|
protected static final int LAST_CORNER_KEY = 5;
|
|
/**
|
|
* Maps images to decorated images.
|
|
*/
|
|
@SuppressWarnings("unchecked")
|
|
private static Map<Image, Map<Image, Image>>[] decoratedImageMap = new Map[LAST_CORNER_KEY];
|
|
|
|
/**
|
|
* Returns an {@link Image} composed of a base image decorated by another image.
|
|
*
|
|
* @param baseImage the base {@link Image} that should be decorated
|
|
* @param decorator the {@link Image} to decorate the base image
|
|
* @return {@link Image} The resulting decorated image
|
|
*/
|
|
public static Image decorateImage(Image baseImage, Image decorator) {
|
|
return decorateImage(baseImage, decorator, BOTTOM_RIGHT);
|
|
}
|
|
|
|
/**
|
|
* Returns an {@link Image} composed of a base image decorated by another image.
|
|
*
|
|
* @param baseImage the base {@link Image} that should be decorated
|
|
* @param decorator the {@link Image} to decorate the base image
|
|
* @param corner the corner to place decorator image
|
|
* @return the resulting decorated {@link Image}
|
|
*/
|
|
public static Image decorateImage(final Image baseImage, final Image decorator, final int corner) {
|
|
if (corner <= 0 || corner >= LAST_CORNER_KEY) {
|
|
throw new IllegalArgumentException("Wrong decorate corner");
|
|
}
|
|
Map<Image, Map<Image, Image>> cornerDecoratedImageMap = decoratedImageMap[corner];
|
|
if (cornerDecoratedImageMap == null) {
|
|
cornerDecoratedImageMap = new HashMap<>();
|
|
decoratedImageMap[corner] = cornerDecoratedImageMap;
|
|
}
|
|
Map<Image, Image> decoratedMap = cornerDecoratedImageMap.computeIfAbsent(baseImage,
|
|
k -> new HashMap<Image, Image>());
|
|
return decoratedMap.computeIfAbsent(decorator, k -> {
|
|
Rectangle bib = baseImage.getBounds();
|
|
Rectangle dib = decorator.getBounds();
|
|
Image result = new Image(Display.getCurrent(), bib.width, bib.height);
|
|
GC gc = new GC(result);
|
|
gc.drawImage(baseImage, 0, 0);
|
|
switch (corner) {
|
|
case TOP_LEFT:
|
|
gc.drawImage(decorator, 0, 0);
|
|
break;
|
|
case TOP_RIGHT:
|
|
gc.drawImage(decorator, bib.width - dib.width, 0);
|
|
break;
|
|
case BOTTOM_LEFT:
|
|
gc.drawImage(decorator, 0, bib.height - dib.height);
|
|
break;
|
|
case BOTTOM_RIGHT:
|
|
gc.drawImage(decorator, bib.width - dib.width, bib.height - dib.height);
|
|
break;
|
|
default:
|
|
// do nothing
|
|
}
|
|
gc.dispose();
|
|
return result;
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Dispose all of the cached {@link Image}'s.
|
|
*/
|
|
public static void disposeImages() {
|
|
// dispose loaded images
|
|
for (Image image : imageMap.values()) {
|
|
image.dispose();
|
|
}
|
|
imageMap.clear();
|
|
// dispose decorated images
|
|
for (int i = 0; i < decoratedImageMap.length; i++) {
|
|
Map<Image, Map<Image, Image>> cornerDecoratedImageMap = decoratedImageMap[i];
|
|
if (cornerDecoratedImageMap != null) {
|
|
for (Map<Image, Image> decoratedMap : cornerDecoratedImageMap.values()) {
|
|
for (Image image : decoratedMap.values()) {
|
|
image.dispose();
|
|
}
|
|
decoratedMap.clear();
|
|
}
|
|
cornerDecoratedImageMap.clear();
|
|
}
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Font
|
|
//
|
|
////////////////////////////////////////////////////////////////////////////
|
|
/**
|
|
* Maps font names to fonts.
|
|
*/
|
|
private static Map<String, Font> fontMap = new HashMap<>();
|
|
/**
|
|
* Maps fonts to their bold versions.
|
|
*/
|
|
private static Map<Font, Font> fontToBoldFontMap = new HashMap<>();
|
|
|
|
/**
|
|
* Returns a {@link Font} based on its name, height and style.
|
|
*
|
|
* @param name the name of the font
|
|
* @param height the height of the font
|
|
* @param style the style of the font
|
|
* @return {@link Font} The font matching the name, height and style
|
|
*/
|
|
public static Font getFont(String name, int height, int style) {
|
|
return getFont(name, height, style, false, false);
|
|
}
|
|
|
|
/**
|
|
* Returns a {@link Font} based on its name, height and style. Windows-specific
|
|
* strikeout and underline flags are also supported.
|
|
*
|
|
* @param name the name of the font
|
|
* @param size the size of the font
|
|
* @param style the style of the font
|
|
* @param strikeout the strikeout flag (warning: Windows only)
|
|
* @param underline the underline flag (warning: Windows only)
|
|
* @return {@link Font} The font matching the name, height, style, strikeout and
|
|
* underline
|
|
*/
|
|
public static Font getFont(String name, int size, int style, boolean strikeout, boolean underline) {
|
|
String fontName = name + '|' + size + '|' + style + '|' + strikeout + '|' + underline;
|
|
return fontMap.computeIfAbsent(fontName, k -> {
|
|
FontData fontData = new FontData(name, size, style);
|
|
if (strikeout || underline) {
|
|
try {
|
|
Class<?> logFontClass = Class.forName("org.eclipse.swt.internal.win32.LOGFONT"); //$NON-NLS-1$
|
|
Object logFont = FontData.class.getField("data").get(fontData); //$NON-NLS-1$
|
|
if (logFont != null && logFontClass != null) {
|
|
if (strikeout) {
|
|
logFontClass.getField("lfStrikeOut").set(logFont, Byte.valueOf((byte) 1)); //$NON-NLS-1$
|
|
}
|
|
if (underline) {
|
|
logFontClass.getField("lfUnderline").set(logFont, Byte.valueOf((byte) 1)); //$NON-NLS-1$
|
|
}
|
|
}
|
|
} catch (Exception e) {
|
|
}
|
|
}
|
|
return new Font(Display.getCurrent(), fontData);
|
|
|
|
});
|
|
|
|
}
|
|
|
|
/**
|
|
* Returns a bold version of the given {@link Font}.
|
|
*
|
|
* @param baseFont the {@link Font} for which a bold version is desired
|
|
* @return the bold version of the given {@link Font}
|
|
*/
|
|
public static Font getBoldFont(Font baseFont) {
|
|
return fontToBoldFontMap.computeIfAbsent(baseFont, k -> {
|
|
FontData[] fontDatas = baseFont.getFontData();
|
|
FontData data = fontDatas[0];
|
|
return new Font(Display.getCurrent(), data.getName(), data.getHeight(), SWT.BOLD);
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Dispose all of the cached {@link Font}'s.
|
|
*/
|
|
public static void disposeFonts() {
|
|
// clear fonts
|
|
for (Font font : fontMap.values()) {
|
|
font.dispose();
|
|
}
|
|
fontMap.clear();
|
|
// clear bold fonts
|
|
for (Font font : fontToBoldFontMap.values()) {
|
|
font.dispose();
|
|
}
|
|
fontToBoldFontMap.clear();
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Cursor
|
|
//
|
|
////////////////////////////////////////////////////////////////////////////
|
|
/**
|
|
* Maps IDs to cursors.
|
|
*/
|
|
private static Map<Integer, Cursor> idToCursorMap = new HashMap<>();
|
|
|
|
/**
|
|
* Returns the system cursor matching the specific ID.
|
|
*
|
|
* @param id int The ID value for the cursor
|
|
* @return Cursor The system cursor matching the specific ID
|
|
*/
|
|
public static Cursor getCursor(int id) {
|
|
Integer key = Integer.valueOf(id);
|
|
return idToCursorMap.computeIfAbsent(key, k -> new Cursor(Display.getDefault(), id));
|
|
}
|
|
|
|
/**
|
|
* Dispose all of the cached cursors.
|
|
*/
|
|
public static void disposeCursors() {
|
|
for (Cursor cursor : idToCursorMap.values()) {
|
|
cursor.dispose();
|
|
}
|
|
idToCursorMap.clear();
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// General
|
|
//
|
|
////////////////////////////////////////////////////////////////////////////
|
|
/**
|
|
* Dispose of cached objects and their underlying OS resources. This should only
|
|
* be called when the cached objects are no longer needed (e.g. on application
|
|
* shutdown).
|
|
*/
|
|
public static void dispose() {
|
|
disposeColors();
|
|
disposeImages();
|
|
disposeFonts();
|
|
disposeCursors();
|
|
}
|
|
} |