Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you 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 com.taobao.weex.utils; import android.graphics.Color; import android.graphics.LinearGradient; import android.graphics.Shader; import android.support.annotation.NonNull; import android.support.v4.util.Pair; import android.text.TextUtils; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.StringTokenizer; /** * Class for parse color */ public class WXResourceUtils { private final static Map<String, Integer> colorMap = new HashMap<>(); private final static int RGB_SIZE = 3; private final static int RGBA_SIZE = 4; private final static int HEX = 16; private final static int COLOR_RANGE = 255; private final static String RGB = "rgb"; private final static String RGBA = "rgba"; private final static SingleFunctionParser.FlatMapper<Integer> FUNCTIONAL_RGB_MAPPER = new SingleFunctionParser.FlatMapper<Integer>() { @Override public Integer map(String raw) { int color = WXUtils.parseUnitOrPercent(raw, COLOR_RANGE); if (color < 0) { color = 0; } else if (color > COLOR_RANGE) { color = COLOR_RANGE; } return color; } }; private final static SingleFunctionParser.NonUniformMapper<Number> FUNCTIONAL_RGBA_MAPPER = new SingleFunctionParser.NonUniformMapper<Number>() { @Override public List<Number> map(List<String> raw) { List<Number> result = new ArrayList<>(RGBA_SIZE); int i, color; for (i = 0; i < RGB_SIZE; i++) { color = WXUtils.parseUnitOrPercent(raw.get(i), COLOR_RANGE); if (color < 0) { color = 0; } else if (color > COLOR_RANGE) { color = COLOR_RANGE; } result.add(color); } result.add(Float.valueOf(raw.get(i))); return result; } }; static { colorMap.put("aliceblue", 0XFFF0F8FF); colorMap.put("antiquewhite", 0XFFFAEBD7); colorMap.put("aqua", 0XFF00FFFF); colorMap.put("aquamarine", 0XFF7FFFD4); colorMap.put("azure", 0XFFF0FFFF); colorMap.put("beige", 0XFFF5F5DC); colorMap.put("bisque", 0XFFFFE4C4); colorMap.put("black", 0XFF000000); colorMap.put("blanchedalmond", 0XFFFFEBCD); colorMap.put("blue", 0XFF0000FF); colorMap.put("blueviolet", 0XFF8A2BE2); colorMap.put("brown", 0XFFA52A2A); colorMap.put("burlywood", 0XFFDEB887); colorMap.put("cadetblue", 0XFF5F9EA0); colorMap.put("chartreuse", 0XFF7FFF00); colorMap.put("chocolate", 0XFFD2691E); colorMap.put("coral", 0XFFFF7F50); colorMap.put("cornflowerblue", 0XFF6495ED); colorMap.put("cornsilk", 0XFFFFF8DC); colorMap.put("crimson", 0XFFDC143C); colorMap.put("cyan", 0XFF00FFFF); colorMap.put("darkblue", 0XFF00008B); colorMap.put("darkcyan", 0XFF008B8B); colorMap.put("darkgoldenrod", 0XFFB8860B); colorMap.put("darkgray", 0XFFA9A9A9); colorMap.put("darkgreen", 0XFF006400); colorMap.put("darkkhaki", 0XFFBDB76B); colorMap.put("darkmagenta", 0XFF8B008B); colorMap.put("darkolivegreen", 0XFF556B2F); colorMap.put("darkorange", 0XFFFF8C00); colorMap.put("darkorchid", 0XFF9932CC); colorMap.put("darkred", 0XFF8B0000); colorMap.put("darksalmon", 0XFFE9967A); colorMap.put("darkseagreen", 0XFF8FBC8F); colorMap.put("darkslateblue", 0XFF483D8B); colorMap.put("darkslategray", 0XFF2F4F4F); colorMap.put("darkslategrey", 0XFF2F4F4F); colorMap.put("darkturquoise", 0XFF00CED1); colorMap.put("darkviolet", 0XFF9400D3); colorMap.put("deeppink", 0XFFFF1493); colorMap.put("deepskyblue", 0XFF00BFFF); colorMap.put("dimgray", 0XFF696969); colorMap.put("dimgrey", 0XFF696969); colorMap.put("dodgerblue", 0XFF1E90FF); colorMap.put("firebrick", 0XFFB22222); colorMap.put("floralwhite", 0XFFFFFAF0); colorMap.put("forestgreen", 0XFF228B22); colorMap.put("fuchsia", 0XFFFF00FF); colorMap.put("gainsboro", 0XFFDCDCDC); colorMap.put("ghostwhite", 0XFFF8F8FF); colorMap.put("gold", 0XFFFFD700); colorMap.put("goldenrod", 0XFFDAA520); colorMap.put("gray", 0XFF808080); colorMap.put("grey", 0XFF808080); colorMap.put("green", 0XFF008000); colorMap.put("greenyellow", 0XFFADFF2F); colorMap.put("honeydew", 0XFFF0FFF0); colorMap.put("hotpink", 0XFFFF69B4); colorMap.put("indianred", 0XFFCD5C5C); colorMap.put("indigo", 0XFF4B0082); colorMap.put("ivory", 0XFFFFFFF0); colorMap.put("khaki", 0XFFF0E68C); colorMap.put("lavender", 0XFFE6E6FA); colorMap.put("lavenderblush", 0XFFFFF0F5); colorMap.put("lawngreen", 0XFF7CFC00); colorMap.put("lemonchiffon", 0XFFFFFACD); colorMap.put("lightblue", 0XFFADD8E6); colorMap.put("lightcoral", 0XFFF08080); colorMap.put("lightcyan", 0XFFE0FFFF); colorMap.put("lightgoldenrodyellow", 0XFFFAFAD2); colorMap.put("lightgray", 0XFFD3D3D3); colorMap.put("lightgrey", 0XFFD3D3D3); colorMap.put("lightgreen", 0XFF90EE90); colorMap.put("lightpink", 0XFFFFB6C1); colorMap.put("lightsalmon", 0XFFFFA07A); colorMap.put("lightseagreen", 0XFF20B2AA); colorMap.put("lightskyblue", 0XFF87CEFA); colorMap.put("lightslategray", 0XFF778899); colorMap.put("lightslategrey", 0XFF778899); colorMap.put("lightsteelblue", 0XFFB0C4DE); colorMap.put("lightyellow", 0XFFFFFFE0); colorMap.put("lime", 0XFF00FF00); colorMap.put("limegreen", 0XFF32CD32); colorMap.put("linen", 0XFFFAF0E6); colorMap.put("magenta", 0XFFFF00FF); colorMap.put("maroon", 0XFF800000); colorMap.put("mediumaquamarine", 0XFF66CDAA); colorMap.put("mediumblue", 0XFF0000CD); colorMap.put("mediumorchid", 0XFFBA55D3); colorMap.put("mediumpurple", 0XFF9370DB); colorMap.put("mediumseagreen", 0XFF3CB371); colorMap.put("mediumslateblue", 0XFF7B68EE); colorMap.put("mediumspringgreen", 0XFF00FA9A); colorMap.put("mediumturquoise", 0XFF48D1CC); colorMap.put("mediumvioletred", 0XFFC71585); colorMap.put("midnightblue", 0XFF191970); colorMap.put("mintcream", 0XFFF5FFFA); colorMap.put("mistyrose", 0XFFFFE4E1); colorMap.put("moccasin", 0XFFFFE4B5); colorMap.put("navajowhite", 0XFFFFDEAD); colorMap.put("navy", 0XFF000080); colorMap.put("oldlace", 0XFFFDF5E6); colorMap.put("olive", 0XFF808000); colorMap.put("olivedrab", 0XFF6B8E23); colorMap.put("orange", 0XFFFFA500); colorMap.put("orangered", 0XFFFF4500); colorMap.put("orchid", 0XFFDA70D6); colorMap.put("palegoldenrod", 0XFFEEE8AA); colorMap.put("palegreen", 0XFF98FB98); colorMap.put("paleturquoise", 0XFFAFEEEE); colorMap.put("palevioletred", 0XFFDB7093); colorMap.put("papayawhip", 0XFFFFEFD5); colorMap.put("peachpuff", 0XFFFFDAB9); colorMap.put("peru", 0XFFCD853F); colorMap.put("pink", 0XFFFFC0CB); colorMap.put("plum", 0XFFDDA0DD); colorMap.put("powderblue", 0XFFB0E0E6); colorMap.put("purple", 0XFF800080); colorMap.put("rebeccapurple", 0XFF663399); colorMap.put("red", 0XFFFF0000); colorMap.put("rosybrown", 0XFFBC8F8F); colorMap.put("royalblue", 0XFF4169E1); colorMap.put("saddlebrown", 0XFF8B4513); colorMap.put("salmon", 0XFFFA8072); colorMap.put("sandybrown", 0XFFF4A460); colorMap.put("seagreen", 0XFF2E8B57); colorMap.put("seashell", 0XFFFFF5EE); colorMap.put("sienna", 0XFFA0522D); colorMap.put("silver", 0XFFC0C0C0); colorMap.put("skyblue", 0XFF87CEEB); colorMap.put("slateblue", 0XFF6A5ACD); colorMap.put("slategray", 0XFF708090); colorMap.put("slategrey", 0XFF708090); colorMap.put("snow", 0XFFFFFAFA); colorMap.put("springgreen", 0XFF00FF7F); colorMap.put("steelblue", 0XFF4682B4); colorMap.put("tan", 0XFFD2B48C); colorMap.put("teal", 0XFF008080); colorMap.put("thistle", 0XFFD8BFD8); colorMap.put("tomato", 0XFFFF6347); colorMap.put("turquoise", 0XFF40E0D0); colorMap.put("violet", 0XFFEE82EE); colorMap.put("wheat", 0XFFF5DEB3); colorMap.put("white", 0XFFFFFFFF); colorMap.put("whitesmoke", 0XFFF5F5F5); colorMap.put("yellow", 0XFFFFFF00); colorMap.put("yellowgreen", 0XFF9ACD32); colorMap.put("transparent", 0x00000000); } public static int getColor(String color) { return getColor(color, Integer.MIN_VALUE); } public static int getColor(String color, int defaultColor) { if (TextUtils.isEmpty(color)) { return defaultColor; } color = color.trim(); //remove non visible codes int resultColor = defaultColor; Pair<Boolean, Integer> result; ColorConvertHandler[] handlers = ColorConvertHandler.values(); for (ColorConvertHandler handler : handlers) { try { result = handler.handle(color); if (result.first) { resultColor = result.second; break; } } catch (RuntimeException e) { WXLogUtils.v("Color_Parser", WXLogUtils.getStackTrace(e)); } } return resultColor; } /** * Assembly gradients * @param image gradient values contains direction?colors * @param width component width * @param height component height * @return gradient shader */ public static Shader getShader(String image, float width, float height) { List<String> valueList = parseGradientValues(image); if (valueList != null && valueList.size() == 3) { float[] points = parseGradientDirection(valueList.get(0), width, height); Shader shader = new LinearGradient(points[0], points[1], points[2], points[3], getColor(valueList.get(1), Color.WHITE), getColor(valueList.get(2), Color.WHITE), Shader.TileMode.REPEAT); return shader; } return null; } /** * parse gradient values contains direction?colors * @param image gradient values * @return split values by comma */ @NonNull private static List<String> parseGradientValues(String image) { if (TextUtils.isEmpty(image)) { return null; } image.trim(); if (image.startsWith("linear-gradient")) { String valueStr = image.substring(image.indexOf("(") + 1, image.lastIndexOf(")")); StringTokenizer tokenizer = new StringTokenizer(valueStr, ","); List<String> values = new ArrayList<>(); String temp = null; while (tokenizer.hasMoreTokens()) { String token = tokenizer.nextToken(); if (token.contains("(")) { temp = token + ","; continue; } if (token.contains(")")) { temp += token; values.add(temp); temp = null; continue; } if (temp != null) { temp += (token + ","); continue; } values.add(token); } return values; } return null; } /** * parse gradient direction * @param direction gradient direction * @param width component width * @param height component height * @return gradient points */ private static float[] parseGradientDirection(String direction, float width, float height) { int x1 = 0, y1 = 1, x2 = 2, y2 = 3; float[] points = { 0, 0, 0, 0 }; if (!TextUtils.isEmpty(direction)) { direction = direction.replaceAll("\\s*", "").toLowerCase(); } switch (direction) { //to right case "toright": points[x2] = width; break; //to left case "toleft": points[x1] = width; break; //to bottom case "tobottom": points[y2] = height; break; //to top case "totop": points[y1] = height; break; //to bottom right case "tobottomright": points[x2] = width; points[y2] = height; break; //to top left case "totopleft": points[x1] = width; points[y1] = height; break; } return points; } enum ColorConvertHandler { NAMED_COLOR_HANDLER { @Override @NonNull Pair<Boolean, Integer> handle(String rawColor) { if (colorMap.containsKey(rawColor)) { return new Pair<>(Boolean.TRUE, colorMap.get(rawColor)); } else { return new Pair<>(Boolean.FALSE, Color.TRANSPARENT); } } }, RGB_HANDLER { @Override @NonNull Pair<Boolean, Integer> handle(String rawColor) { if (rawColor.length() == 4) { //#eee, #333 int r, g, b; r = Integer.parseInt(rawColor.substring(1, 2), HEX); g = Integer.parseInt(rawColor.substring(2, 3), HEX); b = Integer.parseInt(rawColor.substring(3, 4), HEX); return new Pair<>(Boolean.TRUE, Color.rgb(r + (r << 4), g + (g << 4), b + (b << 4))); } else if (rawColor.length() == 7 || rawColor.length() == 9) { //#eeeeee, #333333 return new Pair<>(Boolean.TRUE, Color.parseColor(rawColor)); } else { return new Pair<>(Boolean.FALSE, Color.TRANSPARENT); } } }, FUNCTIONAL_RGB_HANDLER { @Override @NonNull Pair<Boolean, Integer> handle(String rawColor) { SingleFunctionParser<Integer> functionParser = new SingleFunctionParser<>(rawColor, FUNCTIONAL_RGB_MAPPER); List<Integer> rgb = functionParser.parse(RGB); if (rgb.size() == RGB_SIZE) { return new Pair<>(Boolean.TRUE, Color.rgb(rgb.get(0), rgb.get(1), rgb.get(2))); } else { return new Pair<>(Boolean.FALSE, Color.TRANSPARENT); } } }, FUNCTIONAL_RGBA_HANDLER { @Override @NonNull Pair<Boolean, Integer> handle(String rawColor) { SingleFunctionParser<Number> functionParser = new SingleFunctionParser<>(rawColor, FUNCTIONAL_RGBA_MAPPER); List<Number> rgba = functionParser.parse(RGBA); if (rgba.size() == RGBA_SIZE) { return new Pair<>(Boolean.TRUE, Color.argb(parseAlpha(rgba.get(3).floatValue()), rgba.get(0).intValue(), rgba.get(1).intValue(), rgba.get(2).intValue())); } else { return new Pair<>(Boolean.FALSE, Color.TRANSPARENT); } } }; /** * Parse color to #RRGGBB or #AARRGGBB. The parsing algorithm depends on sub-class. * * @param rawColor color, maybe functional RGB(RGBA), #RGB, keywords color or transparent * @return #RRGGBB or #AARRGGBB */ @NonNull abstract Pair<Boolean, Integer> handle(String rawColor); /** * Parse alpha gradient of color from range 0-1 to range 0-255 * * @param alpha the alpha value, in range 0-1 * @return the alpha value, in range 0-255 */ private static int parseAlpha(float alpha) { return (int) (alpha * COLOR_RANGE); } } }