IDEA-62722 import project source encoding from maven config

plugins/maven/src/main/java/org/jetbrains/idea/maven/importing/MavenModuleImporter.java

@@ -20,12 +20,15 @@ import com.intellij.openapi.module.ModuleType;
 import com.intellij.openapi.roots.DependencyScope;
 import com.intellij.openapi.roots.ModifiableRootModel;
 import com.intellij.openapi.util.Pair;
+import com.intellij.openapi.vfs.encoding.EncodingManager;
 import com.intellij.pom.java.LanguageLevel;
 import org.jetbrains.idea.maven.model.MavenArtifact;
 import org.jetbrains.idea.maven.model.MavenConstants;
 import org.jetbrains.idea.maven.project.*;
 import org.jetbrains.idea.maven.utils.MavenUtil;
 
+import java.nio.charset.Charset;
+import java.nio.charset.UnsupportedCharsetException;
 import java.util.List;
 import java.util.Map;
 
@@ -65,6 +68,7 @@ public class MavenModuleImporter {
     configFolders();
     configDependencies();
     configLanguageLevel();
+    configEncoding();
   }
 
   public void preConfigFacets() {
@@ -138,6 +142,20 @@ public class MavenModuleImporter {
     return DependencyScope.COMPILE;
   }
 
+  private void configEncoding() {
+    if (Boolean.parseBoolean(System.getProperty("maven.disable.encode.import"))) return;
+
+    String encoding = myMavenProject.getEncoding();
+    if (encoding != null) {
+      try {
+        EncodingManager.getInstance().setEncoding(myMavenProject.getDirectoryFile(), Charset.forName(encoding));
+      }
+      catch (UnsupportedCharsetException ignored) {
+
+      }
+    }
+  }
+
   private void configLanguageLevel() {
     final LanguageLevel level = LanguageLevel.parse(myMavenProject.getSourceLevel());
     if (level != null) {

plugins/maven/src/main/java/org/jetbrains/idea/maven/project/MavenProject.java

@@ -748,6 +748,19 @@ public class MavenProject {
     return null;
   }
 
+  @Nullable
+  public String getEncoding() {
+    String encoding = myState.myProperties.getProperty("project.build.sourceEncoding");
+    if (encoding != null) return encoding;
+
+    Element pluginConfiguration = getPluginConfiguration("org.apache.maven.plugins", "maven-resources-plugin");
+    if (pluginConfiguration != null) {
+      return pluginConfiguration.getChildTextTrim("encoding");
+    }
+
+    return null;
+  }
+
   @Nullable
   public String getSourceLevel() {
     return getCompilerLevel("source");

plugins/maven/src/test/java/org/jetbrains/idea/maven/importing/EncodingImportingTest.groovy

@@ -0,0 +1,76 @@
+/*
+ * 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.importing
+
+import org.jetbrains.idea.maven.MavenImportingTestCase
+import com.intellij.openapi.vfs.VirtualFile
+import com.intellij.openapi.vfs.VfsUtil
+
+/**
+ * @author Sergey Evdokimov
+ */
+class EncodingImportingTest extends MavenImportingTestCase {
+
+  public void testEncodingDefinedByProperty() {
+    byte[] text = [-12, -59, -53, -45, -44] // Russian text in koi8-r encoding.
+
+    VirtualFile file = createProjectSubFile("src/main/resources/A.txt")
+    file.setBinaryContent(text)
+
+    importProject("""
+<groupId>test</groupId>
+<artifactId>project</artifactId>
+<version>1</version>
+
+<properties>
+<project.build.sourceEncoding>koi8-r</project.build.sourceEncoding>
+</properties>
+""")
+
+    def loadedText = VfsUtil.loadText(file)
+
+    assert loadedText == new String(text, "koi8-r")
+  }
+
+  public void testEncodingDefinedByPluginConfig() {
+    byte[] text = [-12, -59, -53, 45, -44] // Russian text in koi8-r encoding.
+
+    VirtualFile file = createProjectSubFile("src/main/resources/A.txt")
+    file.setBinaryContent(text)
+
+    importProject("""
+<groupId>test</groupId>
+<artifactId>project</artifactId>
+<version>1</version>
+
+  <build>
+    <plugins>
+      <plugin>
+        <artifactId>maven-resources-plugin</artifactId>
+        <configuration>
+          <encoding>koi8-r</encoding>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+""")
+
+    def loadedText = VfsUtil.loadText(file)
+
+    assert loadedText == new String(text, "koi8-r")
+  }
+
+}