[javadoc] 'lang' attribute constant moved to PsiSnippetAttribute

GitOrigin-RevId: 41e07d777a03a745d91e8ddd036db7ab5adf17f6

java/java-impl/src/com/intellij/psi/impl/source/tree/injected/JavadocInjector.java

@@ -21,8 +21,6 @@ import java.util.List;
 
 public class JavadocInjector implements MultiHostInjector {
 
-  private static final String LANG_ATTR_KEY = "lang";
-
   @Override
   public void getLanguagesToInject(@NotNull MultiHostRegistrar registrar,
                                    @NotNull PsiElement context) {
@@ -47,7 +45,7 @@ public class JavadocInjector implements MultiHostInjector {
     final PsiSnippetAttributeList attributeList = valueElement.getAttributeList();
 
     for (PsiSnippetAttribute attribute : attributeList.getAttributes()) {
-      if (!LANG_ATTR_KEY.equals(attribute.getName())) continue;
+      if (!PsiSnippetAttribute.LANG_ATTRIBUTE.equals(attribute.getName())) continue;
 
       final PsiElement langValue = attribute.getValue();
       if (langValue == null) break;

java/java-psi-api/src/com/intellij/psi/javadoc/PsiSnippetAttribute.java

@@ -2,7 +2,6 @@
 package com.intellij.psi.javadoc;
 
 import com.intellij.psi.PsiElement;
-import com.intellij.psi.PsiNamedElement;
 import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
@@ -13,9 +12,29 @@ import org.jetbrains.annotations.Nullable;
  */
 @ApiStatus.Experimental
 public interface PsiSnippetAttribute extends PsiElement {
+  /**
+   * External class location (relative to {@link #SNIPPETS_FOLDER})
+   */
   String CLASS_ATTRIBUTE = "class";
+
+  /**
+   * External file path (relative to {@link #SNIPPETS_FOLDER})
+   */
   String FILE_ATTRIBUTE = "file";
+
+  /**
+   * Region to render
+   */
   String REGION_ATTRIBUTE = "region";
+
+  /**
+   * Language of the snippet
+   */
+  String LANG_ATTRIBUTE = "lang";
+
+  /**
+   * Default folder name to contain external snippets
+   */
   String SNIPPETS_FOLDER = "snippet-files";
   
   PsiSnippetAttribute[] EMPTY_ARRAY = new PsiSnippetAttribute[0];