1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.gui.mappaint;
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3 |
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4 | import java.awt.Color;
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5 | import java.util.Arrays;
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6 | import java.util.HashMap;
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7 | import java.util.List;
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8 | import java.util.Map;
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9 | import java.util.Map.Entry;
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10 | import java.util.TreeSet;
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11 | import java.util.regex.Pattern;
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12 |
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13 | import org.openstreetmap.josm.gui.mappaint.mapcss.CSSColors;
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14 | import org.openstreetmap.josm.tools.ColorHelper;
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15 | import org.openstreetmap.josm.tools.GenericParser;
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16 | import org.openstreetmap.josm.tools.Logging;
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17 |
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18 | /**
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19 | * Simple map of properties with dynamic typing.
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20 | */
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21 | public final class Cascade {
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22 |
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23 | private final Map<String, Object> prop;
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24 |
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25 | private boolean defaultSelectedHandling = true;
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26 |
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27 | private static final Pattern HEX_COLOR_PATTERN = Pattern.compile("#([0-9a-fA-F]{3}|[0-9a-fA-F]{6}|[0-9a-fA-F]{8})");
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28 |
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29 | private static final GenericParser<Object> GENERIC_PARSER = new GenericParser<>()
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30 | .registerParser(float.class, Cascade::toFloat)
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31 | .registerParser(Float.class, Cascade::toFloat)
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32 | .registerParser(double.class, Cascade::toDouble)
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33 | .registerParser(Double.class, Cascade::toDouble)
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34 | .registerParser(boolean.class, Cascade::toBool)
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35 | .registerParser(Boolean.class, Cascade::toBool)
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36 | .registerParser(float[].class, Cascade::toFloatArray)
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37 | .registerParser(Color.class, Cascade::toColor)
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38 | .registerParser(String.class, Cascade::toString);
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39 |
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40 | /**
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41 | * Constructs a new {@code Cascade}.
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42 | */
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43 | public Cascade() {
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44 | this.prop = new HashMap<>();
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45 | }
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46 |
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47 | /**
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48 | * Constructs a new {@code Cascade} from existing one.
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49 | * @param other other Cascade
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50 | */
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51 | public Cascade(Cascade other) {
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52 | this.prop = new HashMap<>(other.prop);
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53 | }
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54 |
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55 | /**
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56 | * Gets the value for a given key with the given type
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57 | * @param <T> the expected type
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58 | * @param key the key
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59 | * @param def default value, can be null
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60 | * @param klass the same as T
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61 | * @return if a value that can be converted to class klass has been mapped to key, returns this
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62 | * value, def otherwise
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63 | */
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64 | public <T> T get(String key, T def, Class<T> klass) {
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65 | return get(key, def, klass, false);
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66 | }
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67 |
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68 | /**
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69 | * Get value for the given key
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70 | * @param <T> the expected type
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71 | * @param key the key
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72 | * @param def default value, can be null
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73 | * @param klass the same as T
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74 | * @param suppressWarnings show or don't show a warning when some value is
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75 | * found, but cannot be converted to the requested type
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76 | * @return if a value that can be converted to class klass has been mapped to key, returns this
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77 | * value, def otherwise
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78 | */
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79 | public <T> T get(String key, T def, Class<T> klass, boolean suppressWarnings) {
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80 | if (def != null && !klass.isInstance(def))
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81 | throw new IllegalArgumentException(def+" is not an instance of "+klass);
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82 | Object o = prop.get(key);
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83 | if (o == null)
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84 | return def;
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85 | T res = convertTo(o, klass);
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86 | if (res == null) {
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87 | if (!suppressWarnings) {
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88 | Logging.warn(String.format("Unable to convert property %s to type %s: found %s of type %s!", key, klass, o, o.getClass()));
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89 | }
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90 | return def;
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91 | } else
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92 | return res;
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93 | }
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94 |
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95 | /**
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96 | * Gets a property for the given key (like stroke, ...)
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97 | * @param key The key of the property
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98 | * @return The value or <code>null</code> if it is not set. May be of any type
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99 | */
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100 | public Object get(String key) {
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101 | return prop.get(key);
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102 | }
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103 |
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104 | /**
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105 | * Sets the property for the given key
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106 | * @param key The key
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107 | * @param val The value
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108 | */
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109 | public void put(String key, Object val) {
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110 | prop.put(key, val);
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111 | }
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112 |
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113 | /**
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114 | * Sets the property for the given key, removes it if the value is <code>null</code>
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115 | * @param key The key
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116 | * @param val The value, may be <code>null</code>
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117 | */
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118 | public void putOrClear(String key, Object val) {
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119 | if (val != null) {
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120 | prop.put(key, val);
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121 | } else {
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122 | prop.remove(key);
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123 | }
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124 | }
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125 |
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126 | /**
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127 | * Removes the property with the given key
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128 | * @param key The key
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129 | */
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130 | public void remove(String key) {
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131 | prop.remove(key);
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132 | }
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133 |
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134 | /**
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135 | * Converts an object to a given other class.
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136 | *
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137 | * Only conversions that are useful for MapCSS are supported
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138 | * @param <T> The class type
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139 | * @param o The object to convert
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140 | * @param klass The class
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141 | * @return The converted object or <code>null</code> if the conversion failed
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142 | */
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143 | @SuppressWarnings("unchecked")
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144 | public static <T> T convertTo(Object o, Class<T> klass) {
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145 | if (o == null)
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146 | return null;
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147 | if (klass.isInstance(o))
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148 | return (T) o;
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149 |
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150 | return GENERIC_PARSER.supports(klass)
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151 | ? GENERIC_PARSER.parse(klass, o)
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152 | : null;
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153 | }
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154 |
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155 | private static String toString(Object o) {
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156 | if (o instanceof Keyword)
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157 | return ((Keyword) o).val;
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158 | if (o instanceof Color) {
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159 | return ColorHelper.color2html((Color) o);
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160 | }
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161 | return o.toString();
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162 | }
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163 |
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164 | private static Float toFloat(Object o) {
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165 | if (o instanceof Number)
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166 | return ((Number) o).floatValue();
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167 | if (o instanceof String && !((String) o).isEmpty()) {
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168 | try {
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169 | return Float.valueOf((String) o);
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170 | } catch (NumberFormatException e) {
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171 | Logging.debug("''{0}'' cannot be converted to float", o);
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172 | }
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173 | }
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174 | return null;
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175 | }
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176 |
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177 | private static Double toDouble(Object o) {
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178 | final Float number = toFloat(o);
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179 | return number != null ? Double.valueOf(number) : null;
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180 | }
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181 |
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182 | private static Boolean toBool(Object o) {
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183 | if (o instanceof Boolean)
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184 | return (Boolean) o;
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185 | String s = null;
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186 | if (o instanceof Keyword) {
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187 | s = ((Keyword) o).val;
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188 | } else if (o instanceof String) {
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189 | s = (String) o;
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190 | }
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191 | if (s != null)
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192 | return !(s.isEmpty() || "false".equals(s) || "no".equals(s) || "0".equals(s) || "0.0".equals(s));
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193 | if (o instanceof Number)
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194 | return ((Number) o).floatValue() != 0;
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195 | if (o instanceof List)
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196 | return !((List<?>) o).isEmpty();
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197 | if (o instanceof float[])
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198 | return ((float[]) o).length != 0;
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199 |
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200 | return null;
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201 | }
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202 |
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203 | private static float[] toFloatArray(Object o) {
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204 | if (o instanceof float[])
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205 | return (float[]) o;
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206 | if (o instanceof List) {
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207 | List<?> l = (List<?>) o;
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208 | float[] a = new float[l.size()];
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209 | for (int i = 0; i < l.size(); ++i) {
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210 | Float f = toFloat(l.get(i));
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211 | if (f == null)
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212 | return null;
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213 | else
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214 | a[i] = f;
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215 | }
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216 | return a;
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217 | }
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218 | Float f = toFloat(o);
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219 | if (f != null)
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220 | return new float[] {f};
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221 | return null;
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222 | }
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223 |
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224 | private static Color toColor(Object o) {
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225 | if (o instanceof Color)
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226 | return (Color) o;
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227 | if (o instanceof Keyword)
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228 | return CSSColors.get(((Keyword) o).val);
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229 | if (o instanceof String) {
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230 | Color c = CSSColors.get((String) o);
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231 | if (c != null)
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232 | return c;
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233 | if (HEX_COLOR_PATTERN.matcher((String) o).matches()) {
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234 | return ColorHelper.html2color((String) o);
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235 | }
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236 | }
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237 | return null;
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238 | }
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239 |
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240 | @Override
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241 | public String toString() {
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242 | StringBuilder res = new StringBuilder("Cascade{ ");
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243 | // List properties in alphabetical order to be deterministic, without changing "prop" to a TreeMap
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244 | // (no reason too, not sure about the potential memory/performance impact of such a change)
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245 | TreeSet<String> props = new TreeSet<>();
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246 | for (Entry<String, Object> entry : prop.entrySet()) {
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247 | StringBuilder sb = new StringBuilder(entry.getKey()).append(':');
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248 | Object val = entry.getValue();
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249 | if (val instanceof float[]) {
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250 | sb.append(Arrays.toString((float[]) val));
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251 | } else if (val instanceof Color) {
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252 | sb.append(ColorHelper.color2html((Color) val));
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253 | } else if (val != null) {
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254 | sb.append(val);
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255 | }
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256 | sb.append("; ");
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257 | props.add(sb.toString());
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258 | }
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259 | for (String s : props) {
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260 | res.append(s);
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261 | }
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262 | return res.append('}').toString();
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263 | }
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264 |
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265 | /**
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266 | * Checks if this cascade has a value for given key
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267 | * @param key The key to check
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268 | * @return <code>true</code> if there is a value
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269 | */
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270 | public boolean containsKey(String key) {
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271 | return prop.containsKey(key);
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272 | }
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273 |
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274 | /**
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275 | * Get if the default selection drawing should be used for the object this cascade applies to
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276 | * @return <code>true</code> to use the default selection drawing
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277 | */
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278 | public boolean isDefaultSelectedHandling() {
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279 | return defaultSelectedHandling;
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280 | }
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281 |
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282 | /**
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283 | * Set that the default selection drawing should be used for the object this cascade applies to
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284 | * @param defaultSelectedHandling <code>true</code> to use the default selection drawing
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285 | */
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286 | public void setDefaultSelectedHandling(boolean defaultSelectedHandling) {
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287 | this.defaultSelectedHandling = defaultSelectedHandling;
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288 | }
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289 | }
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