1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.data.imagery;
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3 |
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4 | import java.io.IOException;
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5 | import java.util.ArrayList;
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6 | import java.util.Arrays;
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7 | import java.util.Collection;
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8 | import java.util.Collections;
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9 | import java.util.List;
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10 | import java.util.Objects;
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11 |
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12 | import org.openstreetmap.josm.Main;
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13 | import org.openstreetmap.josm.data.imagery.ImageryInfo.ImageryPreferenceEntry;
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14 | import org.openstreetmap.josm.io.MirroredInputStream;
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15 | import org.openstreetmap.josm.io.imagery.ImageryReader;
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16 | import org.xml.sax.SAXException;
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17 |
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18 | /**
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19 | * Manages the list of imagery entries that are shown in the imagery menu.
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20 | */
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21 | public class ImageryLayerInfo {
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22 |
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23 | public static final ImageryLayerInfo instance = new ImageryLayerInfo();
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24 | List<ImageryInfo> layers = new ArrayList<>();
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25 | static List<ImageryInfo> defaultLayers = new ArrayList<>();
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26 |
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27 | private static final String[] DEFAULT_LAYER_SITES = {
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28 | Main.getJOSMWebsite()+"/maps"
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29 | };
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30 |
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31 | private ImageryLayerInfo() {
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32 | }
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33 |
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34 | public ImageryLayerInfo(ImageryLayerInfo info) {
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35 | layers.addAll(info.layers);
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36 | }
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37 |
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38 | public void clear() {
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39 | layers.clear();
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40 | }
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41 |
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42 | public void load() {
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43 | boolean addedDefault = !layers.isEmpty();
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44 | List<ImageryPreferenceEntry> entries = Main.pref.getListOfStructs("imagery.entries", null, ImageryPreferenceEntry.class);
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45 | if (entries != null) {
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46 | for (ImageryPreferenceEntry prefEntry : entries) {
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47 | try {
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48 | ImageryInfo i = new ImageryInfo(prefEntry);
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49 | add(i);
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50 | } catch (IllegalArgumentException e) {
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51 | Main.warn("Unable to load imagery preference entry:"+e);
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52 | }
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53 | }
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54 | Collections.sort(layers);
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55 | }
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56 | if (addedDefault) {
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57 | save();
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58 | }
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59 | }
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60 |
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61 | /**
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62 | * Loads the available imagery entries.
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63 | *
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64 | * The data is downloaded from the JOSM website (or loaded from cache).
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65 | * Entries marked as "default" are added to the user selection, if not
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66 | * already present.
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67 | *
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68 | * @param clearCache if true, clear the cache and start a fresh download.
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69 | */
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70 | public void loadDefaults(boolean clearCache) {
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71 | defaultLayers.clear();
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72 | for (String source : Main.pref.getCollection("imagery.layers.sites", Arrays.asList(DEFAULT_LAYER_SITES))) {
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73 | if (clearCache) {
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74 | MirroredInputStream.cleanup(source);
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75 | }
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76 | try {
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77 | ImageryReader reader = new ImageryReader(source);
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78 | Collection<ImageryInfo> result = reader.parse();
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79 | defaultLayers.addAll(result);
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80 | } catch (IOException ex) {
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81 | Main.error(ex, false);
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82 | continue;
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83 | } catch (SAXException ex) {
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84 | Main.error(ex);
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85 | continue;
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86 | }
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87 | }
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88 | while (defaultLayers.remove(null));
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89 |
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90 | Collection<String> defaults = Main.pref.getCollection("imagery.layers.default");
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91 | List<String> defaultsSave = new ArrayList<>();
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92 | for (ImageryInfo def : defaultLayers) {
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93 | if (def.isDefaultEntry()) {
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94 | defaultsSave.add(def.getUrl());
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95 |
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96 | boolean isKnownDefault = false;
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97 | for (String url : defaults) {
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98 | if (isSimilar(url, def.getUrl())) {
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99 | isKnownDefault = true;
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100 | break;
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101 | }
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102 | }
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103 | boolean isInUserList = false;
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104 | if (!isKnownDefault) {
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105 | for (ImageryInfo i : layers) {
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106 | if (isSimilar(def.getUrl(), i.getUrl())) {
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107 | isInUserList = true;
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108 | break;
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109 | }
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110 | }
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111 | }
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112 | if (!isKnownDefault && !isInUserList) {
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113 | add(new ImageryInfo(def));
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114 | }
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115 | }
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116 | }
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117 |
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118 | Collections.sort(defaultLayers);
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119 | Main.pref.putCollection("imagery.layers.default", defaultsSave.isEmpty() ? defaults : defaultsSave);
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120 | }
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121 |
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122 | // some additional checks to respect extended URLs in preferences (legacy workaround)
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123 | private boolean isSimilar(String a, String b) {
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124 | return Objects.equals(a, b) || (a != null && b != null && !a.isEmpty() && !b.isEmpty() && (a.contains(b) || b.contains(a)));
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125 | }
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126 |
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127 | public void add(ImageryInfo info) {
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128 | layers.add(info);
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129 | }
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130 |
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131 | public void remove(ImageryInfo info) {
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132 | layers.remove(info);
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133 | }
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134 |
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135 | public void save() {
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136 | List<ImageryPreferenceEntry> entries = new ArrayList<>();
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137 | for (ImageryInfo info : layers) {
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138 | entries.add(new ImageryPreferenceEntry(info));
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139 | }
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140 | Main.pref.putListOfStructs("imagery.entries", entries, ImageryPreferenceEntry.class);
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141 | }
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142 |
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143 | public List<ImageryInfo> getLayers() {
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144 | return Collections.unmodifiableList(layers);
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145 | }
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146 |
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147 | public List<ImageryInfo> getDefaultLayers() {
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148 | return Collections.unmodifiableList(defaultLayers);
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149 | }
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150 |
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151 | public static void addLayer(ImageryInfo info) {
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152 | instance.add(info);
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153 | instance.save();
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154 | }
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155 |
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156 | public static void addLayers(Collection<ImageryInfo> infos) {
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157 | for (ImageryInfo i : infos) {
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158 | instance.add(i);
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159 | }
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160 | instance.save();
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161 | Collections.sort(instance.layers);
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162 | }
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163 | }
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