1 files changed, 207 insertions, 0 deletions
diff --git a/xml/xml-psi-impl/src/com/intellij/html/impl/util/MicrodataUtil.java b/xml/xml-psi-impl/src/com/intellij/html/impl/util/MicrodataUtil.java
new file mode 100644
index 000000000000..bfdcca25f294
--- /dev/null
+++ b/xml/xml-psi-impl/src/com/intellij/html/impl/util/MicrodataUtil.java
@@ -0,0 +1,207 @@
+/*
+ * Copyright 2000-2014 JetBrains s.r.o.
+ *
+ * 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 com.intellij.html.impl.util;
+
+import com.intellij.openapi.util.Key;
+import com.intellij.openapi.util.TextRange;
+import com.intellij.openapi.util.text.StringUtil;
+import com.intellij.openapi.vfs.VirtualFile;
+import com.intellij.psi.PsiFile;
+import com.intellij.psi.PsiReference;
+import com.intellij.psi.XmlRecursiveElementVisitor;
+import com.intellij.psi.impl.source.resolve.reference.impl.providers.DependentNSReference;
+import com.intellij.psi.impl.source.resolve.reference.impl.providers.URLReference;
+import com.intellij.psi.xml.XmlAttribute;
+import com.intellij.psi.xml.XmlAttributeValue;
+import com.intellij.psi.xml.XmlFile;
+import com.intellij.psi.xml.XmlTag;
+import com.intellij.util.PairFunction;
+import com.intellij.util.text.StringTokenizer;
+import com.intellij.xml.util.HtmlUtil;
+import gnu.trove.THashMap;
+import gnu.trove.THashSet;
+import org.jetbrains.annotations.Nls;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.*;
+
+/**
+ * @author: Fedor.Korotkov
+ */
+public class MicrodataUtil {
+  public static final Key<List<String>> ITEM_PROP_KEYS = Key.create("microdata.prop");
+  public static final String ITEM_REF = "itemref";
+  public static final String ITEM_SCOPE = "itemscope";
+  public static final String ITEM_TYPE = "itemtype";
+  public static final String ITEM_PROP = "itemprop";
+  public static final String ITEM_ID = "itemid";
+
+  public static boolean hasScopeTag(@Nullable XmlTag tag) {
+    return findScopeTag(tag) != null;
+  }
+
+  @Nullable
+  public static XmlTag findScopeTag(@Nullable XmlTag context) {
+    Map<String, XmlTag> id2tag = findScopesWithItemRef(context != null ? context.getContainingFile() : null);
+    XmlTag tag = context;
+    while (tag != null) {
+      if (tag != context && tag.getAttribute(ITEM_SCOPE) != null) return tag;
+      final String id = getStripedAttributeValue(tag, "id");
+      if (id != null && id2tag.containsKey(id)) return id2tag.get(id);
+      tag = tag.getParentTag();
+    }
+    return null;
+  }
+
+  private static Map<String, XmlTag> findScopesWithItemRef(@Nullable PsiFile file) {
+    if (!(file instanceof XmlFile)) return Collections.emptyMap();
+    final Map<String, XmlTag> result = new THashMap<String, XmlTag>();
+    file.accept(new XmlRecursiveElementVisitor() {
+      @Override
+      public void visitXmlTag(final XmlTag tag) {
+        super.visitXmlTag(tag);
+        XmlAttribute refAttr = tag.getAttribute(ITEM_REF);
+        if (refAttr != null && tag.getAttribute(ITEM_SCOPE) != null) {
+          getReferencesForAttributeValue(refAttr.getValueElement(), new PairFunction<String, Integer, PsiReference>() {
+            @Nullable
+            @Override
+            public PsiReference fun(String t, Integer v) {
+              result.put(t, tag);
+              return null;
+            }
+          });
+        }
+      }
+    });
+    return result;
+  }
+
+  public static List<String> extractProperties(PsiFile file, String type) {
+    final VirtualFile virtualFile = file.getVirtualFile();
+    List<String> result = virtualFile != null ? virtualFile.getUserData(ITEM_PROP_KEYS) : null;
+    if (virtualFile != null && result == null) {
+      result = collectNames(file, type);
+      virtualFile.putUserData(ITEM_PROP_KEYS, result);
+    }
+    return result;
+  }
+
+  private static List<String> collectNames(PsiFile file, String type) {
+    if (file instanceof XmlFile) {
+      final CollectNamesVisitor collectNamesVisitor = getVisitorByType(type);
+      file.accept(collectNamesVisitor);
+      return collectNamesVisitor.getValues();
+    }
+    return Collections.emptyList();
+  }
+
+  private static CollectNamesVisitor getVisitorByType(String type) {
+    if (type.contains("schema.org")) {
+      return new CollectNamesFromSchemaOrgVisitor();
+    }
+    return new CollectNamesByMicrodataVisitor(type);
+  }
+
+  public static PsiReference[] getUrlReferencesForAttributeValue(final XmlAttributeValue element) {
+    return getReferencesForAttributeValue(element, new PairFunction<String, Integer, PsiReference>() {
+      @Nullable
+      @Override
+      public PsiReference fun(String token, Integer offset) {
+        if (HtmlUtil.hasHtmlPrefix(token)) {
+          final TextRange range = TextRange.from(offset, token.length());
+          final URLReference urlReference = new URLReference(element, range, true);
+          return new DependentNSReference(element, range, urlReference, true);
+        }
+        return null;
+      }
+    });
+  }
+
+  public static PsiReference[] getReferencesForAttributeValue(@Nullable XmlAttributeValue element,
+                                                              PairFunction<String, Integer, PsiReference> refFun) {
+    if (element == null) {
+      return PsiReference.EMPTY_ARRAY;
+    }
+    String text = element.getText();
+    String urls = StringUtil.stripQuotesAroundValue(text);
+    StringTokenizer tokenizer = new StringTokenizer(urls);
+    List<PsiReference> result = new ArrayList<PsiReference>();
+    while (tokenizer.hasMoreTokens()) {
+      String token = tokenizer.nextToken();
+      int index = text.indexOf(token);
+      PsiReference ref = refFun.fun(token, index);
+      if (ref != null) {
+        result.add(ref);
+      }
+    }
+    return result.toArray(new PsiReference[result.size()]);
+  }
+
+  @Nullable
+  public static String getStripedAttributeValue(@Nullable XmlTag tag, @Nls String attributeName) {
+    String value = tag != null ? tag.getAttributeValue(attributeName) : null;
+    return value != null ? StringUtil.stripQuotesAroundValue(value) : null;
+  }
+
+  private static class CollectNamesVisitor extends XmlRecursiveElementVisitor {
+    protected final Set<String> myValues = new THashSet<String>();
+
+    public List<String> getValues() {
+      return new ArrayList<String>(myValues);
+    }
+  }
+
+  public static class CollectNamesByMicrodataVisitor extends CollectNamesVisitor {
+    protected final String myType;
+    private boolean myCollecting = false;
+
+    public CollectNamesByMicrodataVisitor(String type) {
+      myType = type;
+    }
+
+    @Override
+    public void visitXmlTag(XmlTag tag) {
+      String value = getStripedAttributeValue(tag, ITEM_ID);
+      final boolean isTypeTag = myType.equalsIgnoreCase(value);
+      if (isTypeTag) {
+        myCollecting = true;
+      }
+
+      if (myCollecting && "name".equalsIgnoreCase(getStripedAttributeValue(tag, ITEM_PROP))) {
+        myValues.add(tag.getValue().getTrimmedText());
+      }
+
+      super.visitXmlTag(tag);
+
+      if (isTypeTag) {
+        myCollecting = false;
+      }
+    }
+  }
+
+  public static class CollectNamesFromSchemaOrgVisitor extends CollectNamesVisitor {
+    @Override
+    public void visitXmlTag(XmlTag tag) {
+      super.visitXmlTag(tag);
+      if ("prop-nam".equalsIgnoreCase(getStripedAttributeValue(tag, "class"))) {
+        final String code = tag.getSubTagText("code");
+        if (code != null) {
+          myValues.add(code);
+        }
+      }
+    }
+  }
+}