1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.gui.tagging.presets;
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3 |
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4 | import static org.openstreetmap.josm.tools.I18n.tr;
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5 |
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6 | import java.io.BufferedReader;
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7 | import java.io.File;
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8 | import java.io.IOException;
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9 | import java.io.InputStream;
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10 | import java.io.InputStreamReader;
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11 | import java.io.Reader;
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12 | import java.util.ArrayDeque;
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13 | import java.util.ArrayList;
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14 | import java.util.Collection;
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15 | import java.util.Deque;
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16 | import java.util.HashMap;
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17 | import java.util.Iterator;
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18 | import java.util.LinkedHashSet;
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19 | import java.util.LinkedList;
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20 | import java.util.List;
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21 | import java.util.Map;
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22 | import java.util.Set;
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23 |
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24 | import javax.swing.JOptionPane;
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25 |
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26 | import org.openstreetmap.josm.Main;
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27 | import org.openstreetmap.josm.gui.preferences.map.TaggingPresetPreference;
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28 | import org.openstreetmap.josm.gui.tagging.presets.items.Check;
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29 | import org.openstreetmap.josm.gui.tagging.presets.items.CheckGroup;
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30 | import org.openstreetmap.josm.gui.tagging.presets.items.Combo;
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31 | import org.openstreetmap.josm.gui.tagging.presets.items.ComboMultiSelect;
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32 | import org.openstreetmap.josm.gui.tagging.presets.items.ItemSeparator;
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33 | import org.openstreetmap.josm.gui.tagging.presets.items.Key;
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34 | import org.openstreetmap.josm.gui.tagging.presets.items.Label;
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35 | import org.openstreetmap.josm.gui.tagging.presets.items.Link;
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36 | import org.openstreetmap.josm.gui.tagging.presets.items.MultiSelect;
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37 | import org.openstreetmap.josm.gui.tagging.presets.items.Optional;
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38 | import org.openstreetmap.josm.gui.tagging.presets.items.PresetLink;
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39 | import org.openstreetmap.josm.gui.tagging.presets.items.Roles;
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40 | import org.openstreetmap.josm.gui.tagging.presets.items.Roles.Role;
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41 | import org.openstreetmap.josm.gui.tagging.presets.items.Space;
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42 | import org.openstreetmap.josm.gui.tagging.presets.items.Text;
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43 | import org.openstreetmap.josm.io.CachedFile;
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44 | import org.openstreetmap.josm.io.UTFInputStreamReader;
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45 | import org.openstreetmap.josm.tools.Predicates;
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46 | import org.openstreetmap.josm.tools.Utils;
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47 | import org.openstreetmap.josm.tools.XmlObjectParser;
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48 | import org.xml.sax.SAXException;
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49 |
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50 | /**
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51 | * The tagging presets reader.
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52 | * @since 6068
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53 | */
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54 | public final class TaggingPresetReader {
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55 |
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56 | /**
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57 | * The accepted MIME types sent in the HTTP Accept header.
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58 | * @since 6867
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59 | */
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60 | public static final String PRESET_MIME_TYPES =
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61 | "application/xml, text/xml, text/plain; q=0.8, application/zip, application/octet-stream; q=0.5";
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62 |
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63 | private static volatile File zipIcons;
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64 | private static volatile boolean loadIcons = true;
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65 |
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66 | /**
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67 | * Holds a reference to a chunk of items/objects.
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68 | */
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69 | public static class Chunk {
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70 | /** The chunk id, can be referenced later */
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71 | public String id;
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72 | }
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73 |
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74 | /**
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75 | * Holds a reference to an earlier item/object.
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76 | */
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77 | public static class Reference {
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78 | /** Reference matching a chunk id defined earlier **/
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79 | public String ref;
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80 | }
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81 |
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82 | static class HashSetWithLast<E> extends LinkedHashSet<E> {
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83 | protected transient E last;
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84 |
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85 | @Override
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86 | public boolean add(E e) {
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87 | last = e;
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88 | return super.add(e);
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89 | }
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90 |
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91 | /**
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92 | * Returns the last inserted element.
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93 | * @return the last inserted element
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94 | */
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95 | public E getLast() {
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96 | return last;
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97 | }
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98 | }
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99 |
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100 | /**
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101 | * Returns the set of preset source URLs.
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102 | * @return The set of preset source URLs.
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103 | */
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104 | public static Set<String> getPresetSources() {
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105 | return new TaggingPresetPreference.PresetPrefHelper().getActiveUrls();
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106 | }
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107 |
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108 | private static XmlObjectParser buildParser() {
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109 | XmlObjectParser parser = new XmlObjectParser();
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110 | parser.mapOnStart("item", TaggingPreset.class);
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111 | parser.mapOnStart("separator", TaggingPresetSeparator.class);
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112 | parser.mapBoth("group", TaggingPresetMenu.class);
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113 | parser.map("text", Text.class);
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114 | parser.map("link", Link.class);
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115 | parser.map("preset_link", PresetLink.class);
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116 | parser.mapOnStart("optional", Optional.class);
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117 | parser.mapOnStart("roles", Roles.class);
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118 | parser.map("role", Role.class);
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119 | parser.map("checkgroup", CheckGroup.class);
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120 | parser.map("check", Check.class);
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121 | parser.map("combo", Combo.class);
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122 | parser.map("multiselect", MultiSelect.class);
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123 | parser.map("label", Label.class);
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124 | parser.map("space", Space.class);
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125 | parser.map("key", Key.class);
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126 | parser.map("list_entry", ComboMultiSelect.PresetListEntry.class);
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127 | parser.map("item_separator", ItemSeparator.class);
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128 | parser.mapBoth("chunk", Chunk.class);
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129 | parser.map("reference", Reference.class);
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130 | return parser;
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131 | }
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132 |
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133 | /**
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134 | * Reads all tagging presets from the input reader.
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135 | * @param in The input reader
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136 | * @param validate if {@code true}, XML validation will be performed
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137 | * @return collection of tagging presets
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138 | * @throws SAXException if any XML error occurs
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139 | */
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140 | public static Collection<TaggingPreset> readAll(Reader in, boolean validate) throws SAXException {
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141 | return readAll(in, validate, new HashSetWithLast<TaggingPreset>());
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142 | }
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143 |
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144 | /**
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145 | * Reads all tagging presets from the input reader.
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146 | * @param in The input reader
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147 | * @param validate if {@code true}, XML validation will be performed
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148 | * @param all the accumulator for parsed tagging presets
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149 | * @return the accumulator
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150 | * @throws SAXException if any XML error occurs
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151 | */
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152 | static Collection<TaggingPreset> readAll(Reader in, boolean validate, HashSetWithLast<TaggingPreset> all) throws SAXException {
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153 | XmlObjectParser parser = buildParser();
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154 |
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155 | /** to detect end of {@code <group>} */
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156 | TaggingPresetMenu lastmenu = null;
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157 | /** to detect end of reused {@code <group>} */
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158 | TaggingPresetMenu lastmenuOriginal = null;
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159 | Roles lastrole = null;
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160 | final List<Check> checks = new LinkedList<>();
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161 | List<ComboMultiSelect.PresetListEntry> listEntries = new LinkedList<>();
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162 | final Map<String, List<Object>> byId = new HashMap<>();
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163 | final Deque<String> lastIds = new ArrayDeque<>();
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164 | /** lastIdIterators contains non empty iterators of items to be handled before obtaining the next item from the XML parser */
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165 | final Deque<Iterator<Object>> lastIdIterators = new ArrayDeque<>();
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166 |
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167 | if (validate) {
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168 | parser.startWithValidation(in, Main.getXMLBase()+"/tagging-preset-1.0", "resource://data/tagging-preset.xsd");
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169 | } else {
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170 | parser.start(in);
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171 | }
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172 | while (parser.hasNext() || !lastIdIterators.isEmpty()) {
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173 | final Object o;
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174 | if (!lastIdIterators.isEmpty()) {
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175 | // obtain elements from lastIdIterators with higher priority
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176 | o = lastIdIterators.peek().next();
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177 | if (!lastIdIterators.peek().hasNext()) {
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178 | // remove iterator if is empty
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179 | lastIdIterators.pop();
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180 | }
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181 | } else {
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182 | o = parser.next();
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183 | }
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184 | if (o instanceof Chunk) {
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185 | if (!lastIds.isEmpty() && ((Chunk) o).id.equals(lastIds.peek())) {
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186 | // pop last id on end of object, don't process further
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187 | lastIds.pop();
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188 | ((Chunk) o).id = null;
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189 | continue;
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190 | } else {
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191 | // if preset item contains an id, store a mapping for later usage
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192 | String lastId = ((Chunk) o).id;
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193 | lastIds.push(lastId);
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194 | byId.put(lastId, new ArrayList<>());
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195 | continue;
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196 | }
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197 | } else if (!lastIds.isEmpty()) {
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198 | // add object to mapping for later usage
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199 | byId.get(lastIds.peek()).add(o);
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200 | continue;
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201 | }
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202 | if (o instanceof Reference) {
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203 | // if o is a reference, obtain the corresponding objects from the mapping,
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204 | // and iterate over those before consuming the next element from parser.
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205 | final String ref = ((Reference) o).ref;
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206 | if (byId.get(ref) == null) {
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207 | throw new SAXException(tr("Reference {0} is being used before it was defined", ref));
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208 | }
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209 | Iterator<Object> it = byId.get(ref).iterator();
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210 | if (it.hasNext()) {
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211 | lastIdIterators.push(it);
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212 | } else {
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213 | Main.warn("Ignoring reference '"+ref+"' denoting an empty chunk");
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214 | }
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215 | continue;
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216 | }
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217 | if (!(o instanceof TaggingPresetItem) && !checks.isEmpty()) {
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218 | all.getLast().data.addAll(checks);
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219 | checks.clear();
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220 | }
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221 | if (o instanceof TaggingPresetMenu) {
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222 | TaggingPresetMenu tp = (TaggingPresetMenu) o;
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223 | if (tp == lastmenu || tp == lastmenuOriginal) {
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224 | lastmenu = tp.group;
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225 | } else {
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226 | tp.group = lastmenu;
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227 | if (all.contains(tp)) {
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228 | lastmenuOriginal = tp;
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229 | tp = (TaggingPresetMenu) Utils.filter(all, Predicates.<TaggingPreset>equalTo(tp)).iterator().next();
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230 | lastmenuOriginal.group = null;
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231 | } else {
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232 | tp.setDisplayName();
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233 | all.add(tp);
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234 | lastmenuOriginal = null;
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235 | }
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236 | lastmenu = tp;
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237 | }
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238 | lastrole = null;
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239 | } else if (o instanceof TaggingPresetSeparator) {
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240 | TaggingPresetSeparator tp = (TaggingPresetSeparator) o;
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241 | tp.group = lastmenu;
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242 | all.add(tp);
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243 | lastrole = null;
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244 | } else if (o instanceof TaggingPreset) {
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245 | TaggingPreset tp = (TaggingPreset) o;
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246 | tp.group = lastmenu;
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247 | tp.setDisplayName();
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248 | all.add(tp);
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249 | lastrole = null;
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250 | } else {
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251 | if (!all.isEmpty()) {
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252 | if (o instanceof Roles) {
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253 | all.getLast().data.add((TaggingPresetItem) o);
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254 | if (all.getLast().roles != null) {
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255 | throw new SAXException(tr("Roles cannot appear more than once"));
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256 | }
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257 | all.getLast().roles = (Roles) o;
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258 | lastrole = (Roles) o;
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259 | } else if (o instanceof Role) {
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260 | if (lastrole == null)
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261 | throw new SAXException(tr("Preset role element without parent"));
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262 | lastrole.roles.add((Role) o);
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263 | } else if (o instanceof Check) {
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264 | checks.add((Check) o);
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265 | } else if (o instanceof ComboMultiSelect.PresetListEntry) {
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266 | listEntries.add((ComboMultiSelect.PresetListEntry) o);
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267 | } else if (o instanceof CheckGroup) {
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268 | all.getLast().data.add((TaggingPresetItem) o);
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269 | // Make sure list of checks is empty to avoid adding checks several times
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270 | // when used in chunks (fix #10801)
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271 | ((CheckGroup) o).checks.clear();
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272 | ((CheckGroup) o).checks.addAll(checks);
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273 | checks.clear();
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274 | } else {
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275 | if (!checks.isEmpty()) {
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276 | all.getLast().data.addAll(checks);
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277 | checks.clear();
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278 | }
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279 | all.getLast().data.add((TaggingPresetItem) o);
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280 | if (o instanceof ComboMultiSelect) {
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281 | ((ComboMultiSelect) o).addListEntries(listEntries);
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282 | } else if (o instanceof Key) {
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283 | if (((Key) o).value == null) {
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284 | ((Key) o).value = ""; // Fix #8530
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285 | }
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286 | }
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287 | listEntries = new LinkedList<>();
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288 | lastrole = null;
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289 | }
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290 | } else
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291 | throw new SAXException(tr("Preset sub element without parent"));
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292 | }
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293 | }
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294 | if (!all.isEmpty() && !checks.isEmpty()) {
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295 | all.getLast().data.addAll(checks);
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296 | checks.clear();
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297 | }
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298 | return all;
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299 | }
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300 |
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301 | /**
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302 | * Reads all tagging presets from the given source.
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303 | * @param source a given filename, URL or internal resource
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304 | * @param validate if {@code true}, XML validation will be performed
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305 | * @return collection of tagging presets
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306 | * @throws SAXException if any XML error occurs
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307 | * @throws IOException if any I/O error occurs
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308 | */
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309 | public static Collection<TaggingPreset> readAll(String source, boolean validate) throws SAXException, IOException {
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310 | return readAll(source, validate, new HashSetWithLast<TaggingPreset>());
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311 | }
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312 |
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313 | /**
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314 | * Reads all tagging presets from the given source.
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315 | * @param source a given filename, URL or internal resource
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316 | * @param validate if {@code true}, XML validation will be performed
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317 | * @param all the accumulator for parsed tagging presets
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318 | * @return the accumulator
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319 | * @throws SAXException if any XML error occurs
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320 | * @throws IOException if any I/O error occurs
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321 | */
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322 | static Collection<TaggingPreset> readAll(String source, boolean validate, HashSetWithLast<TaggingPreset> all)
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323 | throws SAXException, IOException {
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324 | Collection<TaggingPreset> tp;
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325 | try (
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326 | CachedFile cf = new CachedFile(source).setHttpAccept(PRESET_MIME_TYPES);
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327 | // zip may be null, but Java 7 allows it: https://blogs.oracle.com/darcy/entry/project_coin_null_try_with
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328 | InputStream zip = cf.findZipEntryInputStream("xml", "preset")
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329 | ) {
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330 | if (zip != null) {
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331 | zipIcons = cf.getFile();
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332 | }
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333 | try (InputStreamReader r = UTFInputStreamReader.create(zip == null ? cf.getInputStream() : zip)) {
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334 | tp = readAll(new BufferedReader(r), validate, all);
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335 | }
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336 | }
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337 | return tp;
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338 | }
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339 |
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340 | /**
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341 | * Reads all tagging presets from the given sources.
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342 | * @param sources Collection of tagging presets sources.
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343 | * @param validate if {@code true}, presets will be validated against XML schema
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344 | * @return Collection of all presets successfully read
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345 | */
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346 | public static Collection<TaggingPreset> readAll(Collection<String> sources, boolean validate) {
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347 | return readAll(sources, validate, true);
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348 | }
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349 |
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350 | /**
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351 | * Reads all tagging presets from the given sources.
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352 | * @param sources Collection of tagging presets sources.
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353 | * @param validate if {@code true}, presets will be validated against XML schema
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354 | * @param displayErrMsg if {@code true}, a blocking error message is displayed in case of I/O exception.
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355 | * @return Collection of all presets successfully read
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356 | */
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357 | public static Collection<TaggingPreset> readAll(Collection<String> sources, boolean validate, boolean displayErrMsg) {
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358 | HashSetWithLast<TaggingPreset> allPresets = new HashSetWithLast<>();
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359 | for (String source : sources) {
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360 | try {
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361 | readAll(source, validate, allPresets);
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362 | } catch (IOException e) {
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363 | Main.error(e, false);
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364 | Main.error(source);
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365 | if (source.startsWith("http")) {
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366 | Main.addNetworkError(source, e);
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367 | }
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368 | if (displayErrMsg) {
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369 | JOptionPane.showMessageDialog(
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370 | Main.parent,
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371 | tr("Could not read tagging preset source: {0}", source),
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372 | tr("Error"),
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373 | JOptionPane.ERROR_MESSAGE
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374 | );
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375 | }
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376 | } catch (SAXException e) {
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377 | Main.error(e);
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378 | Main.error(source);
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379 | JOptionPane.showMessageDialog(
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380 | Main.parent,
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381 | "<html>" + tr("Error parsing {0}: ", source) + "<br><br><table width=600>" + e.getMessage() + "</table></html>",
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382 | tr("Error"),
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383 | JOptionPane.ERROR_MESSAGE
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384 | );
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385 | }
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386 | }
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387 | return allPresets;
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388 | }
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389 |
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390 | /**
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391 | * Reads all tagging presets from sources stored in preferences.
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392 | * @param validate if {@code true}, presets will be validated against XML schema
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393 | * @param displayErrMsg if {@code true}, a blocking error message is displayed in case of I/O exception.
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394 | * @return Collection of all presets successfully read
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395 | */
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396 | public static Collection<TaggingPreset> readFromPreferences(boolean validate, boolean displayErrMsg) {
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397 | return readAll(getPresetSources(), validate, displayErrMsg);
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398 | }
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399 |
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400 | public static File getZipIcons() {
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401 | return zipIcons;
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402 | }
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403 |
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404 | /**
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405 | * Determines if icon images should be loaded.
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406 | * @return {@code true} if icon images should be loaded
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407 | */
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408 | public static boolean isLoadIcons() {
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409 | return loadIcons;
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410 | }
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411 |
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412 | /**
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413 | * Sets whether icon images should be loaded.
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414 | * @param loadIcons {@code true} if icon images should be loaded
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415 | */
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416 | public static void setLoadIcons(boolean loadIcons) {
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417 | TaggingPresetReader.loadIcons = loadIcons;
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418 | }
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419 |
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420 | private TaggingPresetReader() {
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421 | // Hide default constructor for utils classes
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422 | }
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423 | }
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