[GitHub] JaroslavTulach commented on a change in pull request #380: Supporting HTML/Java API/UI constructs in the editor

[GitBox <gi...@apache.org>]

JaroslavTulach commented on a change in pull request #380: Supporting HTML/Java API/UI constructs in the editor
URL: https://github.com/apache/incubator-netbeans/pull/380#discussion_r162921596
 
 

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 File path: editor.htmlui/src/org/netbeans/modules/editor/htmlui/JSEmbeddingProvider.java
 ##########
 @@ -0,0 +1,191 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.netbeans.modules.editor.htmlui;
+
+import com.sun.source.tree.AnnotationTree;
+import com.sun.source.tree.AssignmentTree;
+import com.sun.source.tree.CompilationUnitTree;
+import com.sun.source.tree.ExpressionTree;
+import com.sun.source.tree.LiteralTree;
+import com.sun.source.tree.MethodTree;
+import com.sun.source.util.SourcePositions;
+import com.sun.source.util.TreePath;
+import com.sun.source.util.TreePathScanner;
+import com.sun.source.util.Trees;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import javax.lang.model.element.TypeElement;
+import javax.swing.text.Document;
+import org.netbeans.api.editor.mimelookup.MimeRegistration;
+import org.netbeans.api.java.source.CompilationInfo;
+import org.netbeans.api.java.source.JavaParserResultTask;
+import org.netbeans.api.java.source.JavaSource;
+import org.netbeans.api.lexer.Language;
+import org.netbeans.api.lexer.TokenHierarchy;
+import org.netbeans.api.lexer.TokenSequence;
+import org.netbeans.modules.parsing.api.Snapshot;
+import org.netbeans.modules.parsing.spi.Parser;
+import org.netbeans.modules.parsing.spi.Scheduler;
+import org.netbeans.modules.parsing.spi.SchedulerEvent;
+import org.netbeans.modules.parsing.spi.SchedulerTask;
+import org.netbeans.modules.parsing.spi.TaskFactory;
+
+/**
+ *
+ * @author Tomas Zezula
+ */
+public final class JSEmbeddingProvider extends JavaParserResultTask<Parser.Result> {
+    private static final Logger LOG = Logger.getLogger(JSEmbeddingProvider.class.getName());
+
+    private static final int PRIORITY = 1000;
+    private static final String JS_ANNOTATION = "net.java.html.js.JavaScriptBody";  //NOI18N
+    private static final String BODY = "body";                            //NOI18N
+    private static final String JAVA_MIME_TYPE = "text/x-java";           //NOI18N
+    private static final String JAVASCRIPT_MIME_TYPE = "text/javascript"; //NOI18N
+    private final AtomicBoolean canceled = new AtomicBoolean();
+
+    private JSEmbeddingProvider() {
+        super(JavaSource.Phase.ELEMENTS_RESOLVED);
+    }
+
+    @Override
+    public int getPriority() {
+        return PRIORITY;
+    }
+
+    @Override
+    public void cancel() {
+        canceled.set(true);
+    }
+
+    @Override
+    public Class<? extends Scheduler> getSchedulerClass() {
+        return Scheduler.EDITOR_SENSITIVE_TASK_SCHEDULER;
+    }
+
+    @Override
+    public void run(Parser.Result t, SchedulerEvent se) {
+        canceled.set(false);
+        final CompilationInfo ci = CompilationInfo.get(t);
+        final CompilationUnitTree cu = ci.getCompilationUnit();
+        final Trees trees = ci.getTrees();
+        final SourcePositions sp = trees.getSourcePositions();
+        final Finder f = new Finder(trees);
+        final List<LiteralTree> result = new ArrayList<LiteralTree>();
+        f.scan(cu, result);
+        if (!result.isEmpty()) {
+            try {
+                final TokenHierarchy<Document> tk = TokenHierarchy.get(ci.getDocument());
+                final Language<?> java = Language.find(JAVA_MIME_TYPE);
+                final Language<?> javaScript = Language.find(JAVASCRIPT_MIME_TYPE);
+                if (java != null && javaScript != null) {
+                    final TokenSequence<?> seq = tk.tokenSequence(java);
+                    if (seq != null) {
+                        for (LiteralTree lt : result) {
+                            final int start = (int) sp.getStartPosition(cu, lt);
+                            final int end = (int) sp.getEndPosition(cu, lt);
+                            seq.move(start);
+                            while (seq.moveNext() && seq.offset() < end) {
+                                seq.createEmbedding(javaScript, 1, 1, true);
 
 Review comment:
   This is called, but even if the JavaScript support is installed, I don't see any coloring in the `body="...."` section. Can you advice what is wrong, @tzezula, thanks.

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