IDEA-53165 (Nice to have code highlight in groovy plugin source for maven)

plugins/maven/maven.iml

@@ -52,7 +52,7 @@
     <orderEntry type="library" name="gson" level="project" />
     <orderEntry type="library" exported="" scope="TEST" name="JUnit4" level="project" />
     <orderEntry type="module" module-name="testFramework-java" exported="" scope="TEST" />
-    <orderEntry type="module" module-name="jetgroovy" scope="TEST" />
+    <orderEntry type="module" module-name="jetgroovy" />
     <orderEntry type="module" module-name="maven2-server-impl" scope="RUNTIME" />
     <orderEntry type="library" name="Guava" level="project" />
   </component>

plugins/maven/src/main/java/org/jetbrains/idea/maven/plugins/groovy/MavenGroovyInjector.java

@@ -0,0 +1,68 @@
+/*
+ * Copyright 2000-2012 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 org.jetbrains.idea.maven.plugins.groovy;
+
+import com.intellij.openapi.util.TextRange;
+import com.intellij.psi.InjectedLanguagePlaces;
+import com.intellij.psi.LanguageInjector;
+import com.intellij.psi.PsiElement;
+import com.intellij.psi.PsiLanguageInjectionHost;
+import com.intellij.psi.xml.XmlTag;
+import com.intellij.psi.xml.XmlText;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+import org.jetbrains.plugins.groovy.GroovyFileType;
+
+/**
+ * @author Sergey Evdokimov
+ */
+public class MavenGroovyInjector implements LanguageInjector {
+  @Override
+  public void getLanguagesToInject(@NotNull PsiLanguageInjectionHost host, @NotNull InjectedLanguagePlaces injectionPlacesRegistrar) {
+    if (!(host instanceof XmlText)) return;
+
+    PsiElement sourceTag = host.getParent();
+    if (!isTagOfName(sourceTag, "source")) return;
+
+    PsiElement configurationTag = sourceTag.getParent();
+    if (!isTagOfName(configurationTag, "configuration")) return;
+
+    PsiElement executionTag = configurationTag.getParent();
+    if (!isTagOfName(executionTag, "execution")) return;
+
+    PsiElement executionsTag = executionTag.getParent();
+    if (!isTagOfName(executionsTag, "executions")) return;
+
+    PsiElement pluginTag = executionsTag.getParent();
+    if (!isTagOfName(pluginTag, "plugin")) return;
+
+    XmlTag plugin = (XmlTag)pluginTag;
+
+    XmlTag groupId = plugin.findFirstSubTag("groupId");
+    if (groupId == null || !groupId.getValue().getText().trim().equals("org.codehaus.groovy.maven")) return;
+
+    XmlTag artifactId = plugin.findFirstSubTag("artifactId");
+    if (artifactId == null || !artifactId.getValue().getText().trim().equals("gmaven-plugin")) return;
+
+    if (!"pom.xml".equals(plugin.getContainingFile().getName())) return;
+
+    injectionPlacesRegistrar.addPlace(GroovyFileType.GROOVY_LANGUAGE, TextRange.from(0, host.getTextLength()), null, null);
+  }
+
+  private static boolean isTagOfName(@Nullable PsiElement element, String name) {
+    return element instanceof XmlTag && name.equals(((XmlTag)element).getName());
+  }
+}

plugins/maven/src/main/resources/META-INF/groovy-support.xml

@@ -4,4 +4,7 @@
     <importer implementation="org.jetbrains.idea.maven.importing.Groovy_1_0_Importer"/>
     <importer implementation="org.jetbrains.idea.maven.importing.Groovy_1_1_plus_Importer"/>
   </extensions>
+  <extensions xmlns="com.intellij">
+    <languageInjector implementation="org.jetbrains.idea.maven.plugins.groovy.MavenGroovyInjector"/>
+  </extensions>
 </idea-plugin>

plugins/maven/src/test/java/org/jetbrains/idea/maven/plugins/groovy/MavenGroovyInjectionTest.groovy

@@ -0,0 +1,79 @@
+/*
+ * Copyright 2000-2012 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 org.jetbrains.idea.maven.plugins.groovy
+
+import com.intellij.testFramework.fixtures.LightCodeInsightFixtureTestCase
+
+/**
+ * @author Sergey Evdokimov
+ */
+class MavenGroovyInjectionTest extends LightCodeInsightFixtureTestCase {
+
+  public void testCompletion() {
+    myFixture.configureByText("pom.xml", """
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>simpleMaven</groupId>
+  <artifactId>simpleMaven</artifactId>
+  <version>1.0</version>
+
+  <packaging>jar</packaging>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.codehaus.groovy.maven</groupId>
+        <artifactId>gmaven-plugin</artifactId>
+        <version>1.0</version>
+        <executions>
+          <execution>
+            <id>groovy-magic</id>
+            <phase>package</phase>
+            <goals>
+              <goal>execute</goal>
+            </goals>
+            <configuration>
+              <source>
+                String<caret>
+              </source>
+            </configuration>
+          </execution>
+        </executions>
+        <dependencies>
+          <dependency>
+            <groupId>org.apache.ant</groupId>
+            <artifactId>ant-nodeps</artifactId>
+            <version>1.8.0</version>
+          </dependency>
+        </dependencies>
+      </plugin>
+    </plugins>
+  </build>
+
+</project>
+""")
+
+    myFixture.completeBasic()
+
+    def lookups = myFixture.lookupElementStrings
+    assert lookups.containsAll(["String", "StringBuffer", "StringBuilder"])
+  }
+
+}