[lsp] added IMimeTypeProvider, only highlight keywords starting with a letter, support non-incrmental updates

plugins/org.eclipse.xtext.ide/src/org/eclipse/xtext/ide/editor/syntaxcoloring/IEditorHighlightingConfigurationProvider.xtend

@@ -65,7 +65,7 @@ interface IEditorHighlightingConfigurationProvider {
 
         def Iterable<String> getKeywords() {
             GrammarUtil.containedKeywords(grammarAccess.grammar).filter [
-                Character.isJavaIdentifierStart(it.value.charAt(0))
+                Character.isLetter(it.value.charAt(0))
             ].map[value].toSet.sort
         }
 

plugins/org.eclipse.xtext.ide/src/org/eclipse/xtext/ide/server/Document.xtend

@@ -45,9 +45,13 @@ import org.eclipse.xtend.lib.annotations.Data
     def Document applyChanges(Iterable<? extends TextEdit> changes) {
         var newContent = contents
         for (change : changes) {
-            val start = getOffSet(change.range.start)
-            val end = getOffSet(change.range.end)
-            newContent = newContent.substring(0, start) + change.newText + newContent.substring(end)
+            if (change.range === null) {
+                newContent = change.newText
+            } else {
+                val start = getOffSet(change.range.start)
+                val end = getOffSet(change.range.end)
+                newContent = newContent.substring(0, start) + change.newText + newContent.substring(end)
+            }
         }
         return new Document(version + 1, newContent)
     }

plugins/org.eclipse.xtext.ide/src/org/eclipse/xtext/ide/server/LanguageServerImpl.xtend

@@ -71,6 +71,7 @@ import org.eclipse.xtext.resource.IResourceServiceProvider
 import org.eclipse.xtext.validation.Issue
 
 import static io.typefox.lsapi.util.LsapiFactories.*
+import org.eclipse.xtext.resource.IMimeTypeProvider
 
 /**
  * 
@@ -117,11 +118,13 @@ import static io.typefox.lsapi.util.LsapiFactories.*
 		result.supportedLanguages = newArrayList()
 		for (serviceProvider : languagesRegistry.extensionToFactoryMap.values.filter(IResourceServiceProvider).toSet) {
 		    val extensionProvider = serviceProvider.get(FileExtensionProvider)
+		    val mimeTypesProvider = serviceProvider.get(IMimeTypeProvider)
 		    val langInfo = serviceProvider.get(LanguageInfo)
 		    val highlightingProvider = serviceProvider.get(IEditorHighlightingConfigurationProvider)
 		    val language = new LanguageDescriptionImpl => [
 		        fileExtensions = extensionProvider.fileExtensions.toList
 		        languageId = langInfo.languageName
+		        mimeTypes = mimeTypesProvider.mimeTypes
 		        if (highlightingProvider !== null)
 		          highlightingConfiguration = highlightingProvider.getConfiguration(params.clientName)
 		    ]

plugins/org.eclipse.xtext/src/org/eclipse/xtext/resource/IMimeTypeProvider.xtend

@@ -0,0 +1,28 @@
+/*******************************************************************************
+ * Copyright (c) 2016 TypeFox GmbH (http://www.typefox.io) and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *******************************************************************************/
+package org.eclipse.xtext.resource
+
+import com.google.inject.ImplementedBy
+import java.util.List
+
+/**
+ * @author Sven Efftinge - Initial contribution and API
+ */
+@ImplementedBy(DefaultImpl)
+interface IMimeTypeProvider {
+    
+    def List<String> getMimeTypes()
+    
+    static class DefaultImpl implements IMimeTypeProvider {
+        
+        override getMimeTypes() {
+            #[]
+        }
+        
+    }
+}

tests/org.eclipse.xtext.ide.tests/src/org/eclipse/xtext/ide/tests/server/DocumentTest.xtend

@@ -96,12 +96,25 @@ class DocumentTest {
         ]
     }
     
+    @Test def void testUpdate_nonIncrementalChange() {
+        new Document(1, '''
+            hello world
+            foo
+            bar''') => [
+            assertEquals(' foo ', applyChanges(#[
+                change(null, null, " foo ")
+            ]).contents)
+        ]
+    }
+    
     private def change(PositionImpl startPos, PositionImpl endPos, String newText) {
         new TextEditImpl => [
-              range = new RangeImpl => [
-                  start = startPos
-                  end = endPos
-              ]
+              if (startPos !== null) {
+                  range = new RangeImpl => [
+                      start = startPos
+                      end = endPos
+                  ]
+              }
               it.newText = newText
             ]
     }