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copy Color.parseColor() from AOSP

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This commit is contained in:
Julian Winkler
2023-08-10 11:01:54 +02:00
committed by Mis012
parent 4d90002ec6
commit 44be3ff197
1 changed files with 91 additions and 0 deletions
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91
src/api-impl/android/graphics/Color.java
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@@ -1,6 +1,38 @@
/*
* Copyright (C) 2006 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.graphics;
import java.util.HashMap;
import java.util.Locale;
public class Color {
public static final int BLACK = 0xFF000000;
public static final int DKGRAY = 0xFF444444;
public static final int GRAY = 0xFF888888;
public static final int LTGRAY = 0xFFCCCCCC;
public static final int WHITE = 0xFFFFFFFF;
public static final int RED = 0xFFFF0000;
public static final int GREEN = 0xFF00FF00;
public static final int BLUE = 0xFF0000FF;
public static final int YELLOW = 0xFFFFFF00;
public static final int CYAN = 0xFF00FFFF;
public static final int MAGENTA = 0xFFFF00FF;
public static final int TRANSPARENT = 0;
public static int argb(int alpha, int red, int green, int blue) {
return (alpha << 24) | (red << 16) | (green << 8) | (blue << 0);
}
@@ -12,4 +44,63 @@ public class Color {
public static int alpha(int color) {
return color >>> 24;
}
/**
* Parse the color string, and return the corresponding color-int.
* If the string cannot be parsed, throws an IllegalArgumentException
* exception. Supported formats are:
* #RRGGBB
* #AARRGGBB
* 'red', 'blue', 'green', 'black', 'white', 'gray', 'cyan', 'magenta',
* 'yellow', 'lightgray', 'darkgray', 'grey', 'lightgrey', 'darkgrey',
* 'aqua', 'fuschia', 'lime', 'maroon', 'navy', 'olive', 'purple',
* 'silver', 'teal'
*/
public static int parseColor(String colorString) {
if (colorString.charAt(0) == '#') {
// Use a long to avoid rollovers on #ffXXXXXX
long color = Long.parseLong(colorString.substring(1), 16);
if (colorString.length() == 7) {
// Set the alpha value
color |= 0x00000000ff000000;
} else if (colorString.length() != 9) {
throw new IllegalArgumentException("Unknown color");
}
return (int)color;
} else {
Integer color = sColorNameMap.get(colorString.toLowerCase(Locale.ROOT));
if (color != null) {
return color;
}
}
throw new IllegalArgumentException("Unknown color");
}
private static final HashMap<String, Integer> sColorNameMap;
static {
sColorNameMap = new HashMap<String, Integer>();
sColorNameMap.put("black", BLACK);
sColorNameMap.put("darkgray", DKGRAY);
sColorNameMap.put("gray", GRAY);
sColorNameMap.put("lightgray", LTGRAY);
sColorNameMap.put("white", WHITE);
sColorNameMap.put("red", RED);
sColorNameMap.put("green", GREEN);
sColorNameMap.put("blue", BLUE);
sColorNameMap.put("yellow", YELLOW);
sColorNameMap.put("cyan", CYAN);
sColorNameMap.put("magenta", MAGENTA);
sColorNameMap.put("aqua", 0x00FFFF);
sColorNameMap.put("fuchsia", 0xFF00FF);
sColorNameMap.put("darkgrey", DKGRAY);
sColorNameMap.put("grey", GRAY);
sColorNameMap.put("lightgrey", LTGRAY);
sColorNameMap.put("lime", 0x00FF00);
sColorNameMap.put("maroon", 0x800000);
sColorNameMap.put("navy", 0x000080);
sColorNameMap.put("olive", 0x808000);
sColorNameMap.put("purple", 0x800080);
sColorNameMap.put("silver", 0xC0C0C0);
sColorNameMap.put("teal", 0x008080);
}
}