Bug 497871 - Generic and extensible text editor

This change creates a new extensible text editor, with extension points
for:

* contentAssist
* hover
* syntax highlighting

Some unit tests show examples of extensions. You can load an IDE with
the suggested change (including org.eclipse.ui.editors.tests) and get a
syntax highlighter, a hover support and some content assist on the plain
text editor.

Bug: 497871
Bug: 496117
Bug: 496115
Bug: 496300

Signed-off-by: Mickael Istria <mistria@redhat.com>
Signed-off-by: Sopot Cela <scela@redhat.com>
Change-Id: I2eec71e4620364aa11c500ec07e54c693863cf44

19 files changed, 1305 insertions, 0 deletions

diff --git a/org.eclipse.ui.genericeditor/.classpath b/org.eclipse.ui.genericeditor/.classpath
new file mode 100644
index 00000000000..eca7bdba8f0
--- /dev/null
+++ b/org.eclipse.ui.genericeditor/.classpath
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
+	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>
diff --git a/org.eclipse.ui.genericeditor/.project b/org.eclipse.ui.genericeditor/.project
new file mode 100644
index 00000000000..e1f2994e5af
--- /dev/null
+++ b/org.eclipse.ui.genericeditor/.project
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>org.eclipse.ui.genericeditor</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.pde.ManifestBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.pde.SchemaBuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.pde.PluginNature</nature>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>
diff --git a/org.eclipse.ui.genericeditor/.settings/org.eclipse.jdt.core.prefs b/org.eclipse.ui.genericeditor/.settings/org.eclipse.jdt.core.prefs
new file mode 100644
index 00000000000..0c68a61dca8
--- /dev/null
+++ b/org.eclipse.ui.genericeditor/.settings/org.eclipse.jdt.core.prefs
@@ -0,0 +1,7 @@
+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
+org.eclipse.jdt.core.compiler.compliance=1.8
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.source=1.8
diff --git a/org.eclipse.ui.genericeditor/META-INF/MANIFEST.MF b/org.eclipse.ui.genericeditor/META-INF/MANIFEST.MF
new file mode 100644
index 00000000000..ca7ab11688a
--- /dev/null
+++ b/org.eclipse.ui.genericeditor/META-INF/MANIFEST.MF
@@ -0,0 +1,17 @@
+Manifest-Version: 1.0
+Bundle-ManifestVersion: 2
+Bundle-Name: Generic and Extensible Text Editor
+Bundle-SymbolicName: org.eclipse.ui.genericeditor;singleton:=true
+Bundle-Version: 1.0.0.qualifier
+Bundle-Vendor: Eclipse.org
+Bundle-RequiredExecutionEnvironment: JavaSE-1.8
+Require-Bundle: org.eclipse.ui.workbench.texteditor;bundle-version="3.10.0",
+ org.eclipse.ui.editors;bundle-version="3.10.0",
+ org.eclipse.ui;bundle-version="3.108.0",
+ org.eclipse.text;bundle-version="3.6.0",
+ org.eclipse.jface.text;bundle-version="3.11.0",
+ org.eclipse.core.runtime;bundle-version="3.12.0"
+Export-Package: org.eclipse.ui.internal.genericeditor;x-internal:=true
+Bundle-Activator: org.eclipse.ui.internal.genericeditor.GenericEditorPlugin
+Bundle-Localization: plugin
+Bundle-ActivationPolicy: lazy
diff --git a/org.eclipse.ui.genericeditor/build.properties b/org.eclipse.ui.genericeditor/build.properties
new file mode 100644
index 00000000000..bef8e620327
--- /dev/null
+++ b/org.eclipse.ui.genericeditor/build.properties
@@ -0,0 +1,7 @@
+source.. = src/
+output.. = bin/
+bin.includes = META-INF/,\
+               .,\
+               plugin.xml,\
+               plugin.properties,\
+               icons/
diff --git a/org.eclipse.ui.genericeditor/icons/full/obj16/geneditor.png b/org.eclipse.ui.genericeditor/icons/full/obj16/geneditor.png
new file mode 100644
index 00000000000..25b7217874f
--- /dev/null
+++ b/org.eclipse.ui.genericeditor/icons/full/obj16/geneditor.png
diff --git a/org.eclipse.ui.genericeditor/plugin.properties b/org.eclipse.ui.genericeditor/plugin.properties
new file mode 100644
index 00000000000..b6a2e26f60c
--- /dev/null
+++ b/org.eclipse.ui.genericeditor/plugin.properties
@@ -0,0 +1,10 @@
+genericEditor_name=Generic Text Editor
+ExtPoint.presentationReconciliers=Presentation Reconciliers
+ExtPoint.hoverProvider= Hover Providers
+ExtPoint.contentAssistProcessors=Content Assist Providers
+openDeclarationCommand_name=Open Declaration
+openDeclarationCommand_name=Open Declaration for selected element
+context_name=in Generic Code Editor
+context_description=When editing in the Generic Code Editor
+findReferencesCommand_name=Find References
+findReferencesCommand_description=Find other code items referencing the current selected item.
\ No newline at end of file
diff --git a/org.eclipse.ui.genericeditor/plugin.xml b/org.eclipse.ui.genericeditor/plugin.xml
new file mode 100644
index 00000000000..dba3b9ab914
--- /dev/null
+++ b/org.eclipse.ui.genericeditor/plugin.xml
@@ -0,0 +1,64 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<?eclipse version="3.4"?>
+<plugin>
+   <extension-point id="presentationReconcilers" name="%ExtPoint.presentationReconciliers" schema="schema/presentationReconcilers.exsd"/>
+   <extension-point id="contentAssistProcessors" name="%ExtPoint.contentAssistProcessors" schema="schema/contentAssistProcessors.exsd"/>
+   <extension-point id="hoverProviders" name="%ExtPoint.hoverProviders" schema="schema/hoverProviders.exsd"/>
+   <extension
+         point="org.eclipse.ui.editors">
+      <editor
+            class="org.eclipse.ui.internal.genericeditor.ExtensionBasedTextEditor"
+            default="false"
+            icon="icons/full/obj16/geneditor.png"
+            id="org.eclipse.ui.genericeditor.GenericEditor"
+            name="%genericEditor_name">
+         <contentTypeBinding
+               contentTypeId="org.eclipse.core.runtime.text">
+         </contentTypeBinding>
+      </editor>
+   </extension>
+   <extension
+         point="org.eclipse.ui.commands">
+      <command
+            description="%findReferencesCommand_description"
+            id="org.eclipse.ui.genericeditor.findReferences"
+            name="%findReferencesCommand_name">
+      </command>
+   </extension>
+   <extension
+         point="org.eclipse.ui.contexts">
+      <context
+            description="%context_description"
+            id="org.eclipse.ui.genericeditor.genericEditorContext"
+            name="%context_name"
+            parentId="org.eclipse.ui.textEditorScope">
+      </context>
+   </extension>
+   <extension
+         point="org.eclipse.ui.bindings">
+      <key
+            commandId="org.eclipse.ui.edit.text.open.hyperlink"
+            contextId="org.eclipse.ui.genericeditor.genericEditorContext"
+            schemeId="org.eclipse.ui.defaultAcceleratorConfiguration"
+            sequence="F3">
+      </key>
+      <key
+            commandId="org.eclipse.ui.genericeditor.findReferences"
+            contextId="org.eclipse.ui.genericeditor.genericEditorContext"
+            schemeId="org.eclipse.ui.defaultAcceleratorConfiguration"
+            sequence="M1+M2+G">
+      </key>
+   </extension>
+   <extension
+         point="org.eclipse.ui.menus">
+      <menuContribution
+            allPopups="true"
+            locationURI="popup:#TextEditorContext?after=additions">
+         <command
+               commandId="org.eclipse.ui.genericeditor.findReferences"
+               style="push">
+         </command>
+      </menuContribution>
+   </extension>
+
+</plugin>
diff --git a/org.eclipse.ui.genericeditor/pom.xml b/org.eclipse.ui.genericeditor/pom.xml
new file mode 100644
index 00000000000..df83a530d13
--- /dev/null
+++ b/org.eclipse.ui.genericeditor/pom.xml
@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  Copyright (c) 2016 Red Hat Inc. and others.
+  All rights reserved. This program and the accompanying materials
+  are made available under the terms of the Eclipse Distribution License v1.0
+  which accompanies this distribution, and is available at
+  http://www.eclipse.org/org/documents/edl-v10.php
+
+  Contributors:
+     Mickael Istria (Red Hat Inc.) - initial implementation
+-->
+<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>
+  <parent>
+    <artifactId>eclipse.platform.text</artifactId>
+    <groupId>eclipse.platform.text</groupId>
+    <version>4.7.0-SNAPSHOT</version>
+  </parent>
+  <groupId>org.eclipse.ui</groupId>
+  <artifactId>org.eclipse.ui.genericeditor</artifactId>
+  <version>1.0.0-SNAPSHOT</version>
+  <packaging>eclipse-plugin</packaging>
+</project>
diff --git a/org.eclipse.ui.genericeditor/schema/contentAssistProcessors.exsd b/org.eclipse.ui.genericeditor/schema/contentAssistProcessors.exsd
new file mode 100644
index 00000000000..441b85ab13f
--- /dev/null
+++ b/org.eclipse.ui.genericeditor/schema/contentAssistProcessors.exsd
@@ -0,0 +1,116 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<!-- Schema file written by PDE -->
+<schema targetNamespace="org.eclipse.ui.genericeditor" xmlns="http://www.w3.org/2001/XMLSchema">
+<annotation>
+      <appinfo>
+         <meta.schema plugin="org.eclipse.ui.genericeditor" id="contentAssistProcessors" name="Content assist processors"/>
+      </appinfo>
+      <documentation>
+         This extension point is used to contribute content assist processors for adding content assist support to a given content type.
+      </documentation>
+   </annotation>
+
+   <include schemaLocation="schema://org.eclipse.core.expressions/schema/expressionLanguage.exsd"/>
+
+   <element name="extension">
+      <annotation>
+         <appinfo>
+            <meta.element />
+         </appinfo>
+      </annotation>
+      <complexType>
+         <sequence minOccurs="1" maxOccurs="unbounded">
+            <element ref="contentAssistProcessor"/>
+         </sequence>
+         <attribute name="point" type="string" use="required">
+            <annotation>
+               <documentation>
+                  a fully qualified identifier of the target extension point
+               </documentation>
+            </annotation>
+         </attribute>
+         <attribute name="id" type="string">
+            <annotation>
+               <documentation>
+                  an optional identifier of the extension instance
+               </documentation>
+            </annotation>
+         </attribute>
+         <attribute name="name" type="string">
+            <annotation>
+               <documentation>
+                  an optional name of the extension instance
+               </documentation>
+               <appinfo>
+                  <meta.attribute translatable="true"/>
+               </appinfo>
+            </annotation>
+         </attribute>
+      </complexType>
+   </element>
+
+   <element name="contentAssistProcessor">
+      <complexType>
+         <attribute name="class" type="string" use="required">
+            <annotation>
+               <documentation>
+                  The fully qualified class name implementing the interface &lt;code&gt;org.eclipse.jface.text.contentassist.IContentAssistProcessor&lt;/code&gt;
+               </documentation>
+               <appinfo>
+                  <meta.attribute kind="java" basedOn=":org.eclipse.jface.text.contentassist.IContentAssistProcessor"/>
+               </appinfo>
+            </annotation>
+         </attribute>
+         <attribute name="contentType" type="string" use="required">
+            <annotation>
+               <documentation>
+                  The target content-type for this extension. Content-types are defined as extension to the org.eclipse.core.contenttype.contentTypes extension point.
+               </documentation>
+               <appinfo>
+                  <meta.attribute kind="identifier" basedOn="org.eclipse.core.contenttype.contentTypes/content-type/@id"/>
+               </appinfo>
+            </annotation>
+         </attribute>
+      </complexType>
+   </element>
+
+   <annotation>
+      <appinfo>
+         <meta.section type="since"/>
+      </appinfo>
+      <documentation>
+         1.0
+      </documentation>
+   </annotation>
+
+   <annotation>
+      <appinfo>
+         <meta.section type="examples"/>
+      </appinfo>
+      <documentation>
+         This is an example of a processor being registered for a target definition file type:
+
+&lt;pre&gt;
+&lt;extension point=&quot;org.eclipse.ui.genericeditor.contentAssistProcessors&quot;&gt;
+   &lt;contentAssistProcessor
+            class=&quot;org.eclipse.ui.genericeditor.examples.TargedDefinitionContentAssist&quot;
+            contentType=&quot;org.eclipse.pde.targetFile&quot;&gt;
+   &lt;/contentAssistProcessor&gt;
+&lt;/extension&gt;
+&lt;/pre&gt;
+      </documentation>
+   </annotation>
+
+
+
+   <annotation>
+      <appinfo>
+         <meta.section type="copyright"/>
+      </appinfo>
+      <documentation>
+         Copyright (c) 2016 Red Hat Inc. 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 &lt;a href=&quot;http://www.eclipse.org/legal/epl-v10.html&quot;&gt;http://www.eclipse.org/legal/epl-v10.html&lt;/a&gt;
+      </documentation>
+   </annotation>
+
+</schema>
diff --git a/org.eclipse.ui.genericeditor/schema/hoverProviders.exsd b/org.eclipse.ui.genericeditor/schema/hoverProviders.exsd
new file mode 100644
index 00000000000..ac475e82af3
--- /dev/null
+++ b/org.eclipse.ui.genericeditor/schema/hoverProviders.exsd
@@ -0,0 +1,145 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<!-- Schema file written by PDE -->
+<schema targetNamespace="org.eclipse.ui.genericeditor" xmlns="http://www.w3.org/2001/XMLSchema">
+<annotation>
+      <appinfo>
+         <meta.schema plugin="org.eclipse.ui.genericeditor" id="hoverProviders" name="Hover providers"/>
+      </appinfo>
+      <documentation>
+         This extension point is used to contribute hover providers for showing text hovers in a file with a given content type.
+      </documentation>
+   </annotation>
+
+   <include schemaLocation="schema://org.eclipse.core.expressions/schema/expressionLanguage.exsd"/>
+
+   <element name="extension">
+      <annotation>
+         <appinfo>
+            <meta.element />
+         </appinfo>
+      </annotation>
+      <complexType>
+         <sequence>
+            <element ref="hoverProvider" minOccurs="1" maxOccurs="unbounded"/>
+         </sequence>
+         <attribute name="point" type="string" use="required">
+            <annotation>
+               <documentation>
+                  a fully qualified identifier of the target extension point
+               </documentation>
+            </annotation>
+         </attribute>
+         <attribute name="id" type="string">
+            <annotation>
+               <documentation>
+                  an optional identifier of the extension instance
+               </documentation>
+            </annotation>
+         </attribute>
+         <attribute name="name" type="string">
+            <annotation>
+               <documentation>
+                  an optional name of the extension instance
+               </documentation>
+               <appinfo>
+                  <meta.attribute translatable="true"/>
+               </appinfo>
+            </annotation>
+         </attribute>
+      </complexType>
+   </element>
+
+   <element name="hoverProvider">
+      <complexType>
+         <attribute name="id" type="string">
+            <annotation>
+               <documentation>
+                  A string uniquely identifying this reference provider.
+               </documentation>
+            </annotation>
+         </attribute>
+         <attribute name="class" type="string" use="required">
+            <annotation>
+               <documentation>
+                  The fully qualified class name implementing the interface &lt;code&gt;org.eclipse.jface.text.ITextHover&lt;/code&gt;
+               </documentation>
+               <appinfo>
+                  <meta.attribute kind="java" basedOn=":org.eclipse.jface.text.ITextHover"/>
+               </appinfo>
+            </annotation>
+         </attribute>
+         <attribute name="contentType" type="string" use="required">
+            <annotation>
+               <documentation>
+                  The target content-type for this extension. Content-types are defined as extension to the org.eclipse.core.contenttype.contentTypes extension point.
+               </documentation>
+               <appinfo>
+                  <meta.attribute kind="identifier" basedOn="org.eclipse.core.contenttype.contentTypes/content-type/@id"/>
+               </appinfo>
+            </annotation>
+         </attribute>
+         <attribute name="before" type="string">
+            <annotation>
+               <documentation>
+                  The id of a hoverProvider before which to place this contribution.
+Plan is to have contributions are sorted according to that value and to have only the first one shown (or the the first &quot;compoundable&quot; ones)
+               </documentation>
+               <appinfo>
+                  <meta.attribute kind="identifier" basedOn="org.eclipse.ui.genericeditor.hoverProviders/hoverProvider/@id"/>
+               </appinfo>
+            </annotation>
+         </attribute>
+         <attribute name="after" type="string">
+            <annotation>
+               <documentation>
+                  The id of a hoverProvider after which to place this contribution.
+Plan is to have contributions are sorted according to that value and to have only the first one shown (or the the first &quot;compoundable&quot; ones)
+               </documentation>
+               <appinfo>
+                  <meta.attribute kind="identifier" basedOn="org.eclipse.ui.genericeditor.hoverProviders/hoverProvider/@id"/>
+               </appinfo>
+            </annotation>
+         </attribute>
+      </complexType>
+   </element>
+
+   <annotation>
+      <appinfo>
+         <meta.section type="since"/>
+      </appinfo>
+      <documentation>
+         1.0
+      </documentation>
+   </annotation>
+
+   <annotation>
+      <appinfo>
+         <meta.section type="examples"/>
+      </appinfo>
+      <documentation>
+         Below is an example using the hover provider extension point:
+
+&lt;pre&gt;
+&lt;extension point=&quot;org.eclipse.ui.genericeditor.hoverProviders&quot;&gt;
+  &lt;hoverProvider
+     class=&quot;org.eclipse.ui.genericeditor.tests.contributions.MagicHoverProvider&quot;
+     contentType=&quot;org.eclipse.core.runtime.text&quot;&gt;
+  &lt;/hoverProvider&gt;
+&lt;/extension&gt;
+&lt;/pre&gt;
+      </documentation>
+   </annotation>
+
+
+
+   <annotation>
+      <appinfo>
+         <meta.section type="copyright"/>
+      </appinfo>
+      <documentation>
+         Copyright (c) 2016 Red Hat Inc. 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 &lt;a href=&quot;http://www.eclipse.org/legal/epl-v10.html&quot;&gt;http://www.eclipse.org/legal/epl-v10.html&lt;/a&gt;
+      </documentation>
+   </annotation>
+
+</schema>
diff --git a/org.eclipse.ui.genericeditor/schema/presentationReconcilers.exsd b/org.eclipse.ui.genericeditor/schema/presentationReconcilers.exsd
new file mode 100644
index 00000000000..17aca3a3506
--- /dev/null
+++ b/org.eclipse.ui.genericeditor/schema/presentationReconcilers.exsd
@@ -0,0 +1,116 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<!-- Schema file written by PDE -->
+<schema targetNamespace="org.eclipse.ui.genericeditor" xmlns="http://www.w3.org/2001/XMLSchema">
+<annotation>
+      <appinfo>
+         <meta.schema plugin="org.eclipse.ui.genericeditor" id="presentationReconcilers" name="Presentation reconcilers"/>
+      </appinfo>
+      <documentation>
+         This extension point is used to contribute presentation reconcilers for controlling the presentation on a file with a given content type.
+      </documentation>
+   </annotation>
+
+   <include schemaLocation="schema://org.eclipse.core.expressions/schema/expressionLanguage.exsd"/>
+
+   <element name="extension">
+      <annotation>
+         <appinfo>
+            <meta.element />
+         </appinfo>
+      </annotation>
+      <complexType>
+         <sequence minOccurs="1" maxOccurs="unbounded">
+            <element ref="presentationReconciler"/>
+         </sequence>
+         <attribute name="point" type="string" use="required">
+            <annotation>
+               <documentation>
+                  a fully qualified identifier of the target extension point
+               </documentation>
+            </annotation>
+         </attribute>
+         <attribute name="id" type="string">
+            <annotation>
+               <documentation>
+                  an optional identifier of the extension instance
+               </documentation>
+            </annotation>
+         </attribute>
+         <attribute name="name" type="string">
+            <annotation>
+               <documentation>
+                  an optional name of the extension instance
+               </documentation>
+               <appinfo>
+                  <meta.attribute translatable="true"/>
+               </appinfo>
+            </annotation>
+         </attribute>
+      </complexType>
+   </element>
+
+   <element name="presentationReconciler">
+      <complexType>
+         <attribute name="class" type="string" use="required">
+            <annotation>
+               <documentation>
+                  The fully qualified class name implementing the interface &lt;code&gt;org.eclipse.jface.text.presentation.IPresentationReconciler&lt;/code&gt;
+               </documentation>
+               <appinfo>
+                  <meta.attribute kind="java" basedOn=":org.eclipse.jface.text.presentation.IPresentationReconciler"/>
+               </appinfo>
+            </annotation>
+         </attribute>
+         <attribute name="contentType" type="string" use="required">
+            <annotation>
+               <documentation>
+                  The target content-type for this extension. Content-types are defined as extension to the org.eclipse.core.contenttype.contentTypes extension point.
+               </documentation>
+               <appinfo>
+                  <meta.attribute kind="identifier" basedOn="org.eclipse.core.contenttype.contentTypes/content-type/@id"/>
+               </appinfo>
+            </annotation>
+         </attribute>
+      </complexType>
+   </element>
+
+   <annotation>
+      <appinfo>
+         <meta.section type="since"/>
+      </appinfo>
+      <documentation>
+         1.0
+      </documentation>
+   </annotation>
+
+   <annotation>
+      <appinfo>
+         <meta.section type="examples"/>
+      </appinfo>
+      <documentation>
+         Below is an example of how to use the Presentation Reconciler extension point:
+
+&lt;pre&gt;
+&lt;extension point=&quot;org.eclipse.ui.genericeditor.presentationReconcilers&quot;&gt;
+      &lt;presentationReconciler
+            class=&quot;org.eclipse.ui.genericeditor.examples.TPPresentationReconciler&quot;
+            contentType=&quot;org.eclipse.pde.targetFile&quot;&gt;
+      &lt;/presentationReconciler&gt;
+&lt;/extension&gt;
+&lt;/pre&gt;
+      </documentation>
+   </annotation>
+
+
+
+   <annotation>
+      <appinfo>
+         <meta.section type="copyright"/>
+      </appinfo>
+      <documentation>
+         Copyright (c) 2016 Red Hat Inc. 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 &lt;a href=&quot;http://www.eclipse.org/legal/epl-v10.html&quot;&gt;http://www.eclipse.org/legal/epl-v10.html&lt;/a&gt;
+      </documentation>
+   </annotation>
+
+</schema>
diff --git a/org.eclipse.ui.genericeditor/src/org/eclipse/ui/internal/genericeditor/CompositeContentAssistProcessor.java b/org.eclipse.ui.genericeditor/src/org/eclipse/ui/internal/genericeditor/CompositeContentAssistProcessor.java
new file mode 100644
index 00000000000..d4d64acee51
--- /dev/null
+++ b/org.eclipse.ui.genericeditor/src/org/eclipse/ui/internal/genericeditor/CompositeContentAssistProcessor.java
@@ -0,0 +1,93 @@
+/*******************************************************************************
+ * Copyright (c) 2016 Red Hat Inc. 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
+ *
+ * Contributors:
+ * - Mickael Istria (Red Hat Inc.)
+ *******************************************************************************/
+package org.eclipse.ui.internal.genericeditor;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+import org.eclipse.jface.text.ITextViewer;
+import org.eclipse.jface.text.contentassist.ICompletionProposal;
+import org.eclipse.jface.text.contentassist.IContentAssistProcessor;
+import org.eclipse.jface.text.contentassist.IContextInformation;
+import org.eclipse.jface.text.contentassist.IContextInformationValidator;
+
+/**
+ * A content assist processor that delegates all content assist
+ * operations to children provided in constructor and aggregates
+ * the results.
+ * 
+ * @since 1.0
+ */
+public class CompositeContentAssistProcessor implements IContentAssistProcessor {
+
+	private List<IContentAssistProcessor> fContentAssistProcessors;
+
+	/**
+	 * Constructor
+	 * @param contentAssistProcessors the children that will actually populate the output
+	 *        of this content assist processor.
+	 */
+	public CompositeContentAssistProcessor(List<IContentAssistProcessor> contentAssistProcessors) {
+		fContentAssistProcessors= contentAssistProcessors;
+	}
+
+	@Override
+	public ICompletionProposal[] computeCompletionProposals(ITextViewer viewer, int offset) {
+		List<ICompletionProposal> res = new ArrayList<>();
+		for (IContentAssistProcessor processor : this.fContentAssistProcessors) {
+			res.addAll(Arrays.asList(processor.computeCompletionProposals(viewer, offset)));
+		}
+		return res.toArray(new ICompletionProposal[res.size()]);
+	}
+
+	@Override
+	public IContextInformation[] computeContextInformation(ITextViewer viewer, int offset) {
+		List<IContextInformation> res = new ArrayList<>();
+		for (IContentAssistProcessor processor : this.fContentAssistProcessors) {
+			res.addAll(Arrays.asList(processor.computeContextInformation(viewer, offset)));
+		}
+		return res.toArray(new IContextInformation[res.size()]);
+	}
+
+	@Override
+	public char[] getCompletionProposalAutoActivationCharacters() {
+		return null;
+	}
+
+	@Override
+	public char[] getContextInformationAutoActivationCharacters() {
+		return null;
+	}
+
+	@Override
+	public String getErrorMessage() {
+		StringBuilder res = new StringBuilder();
+		for (IContentAssistProcessor processor : this.fContentAssistProcessors) {
+			String errorMessage = processor.getErrorMessage();
+			if (errorMessage != null) {
+				res.append(errorMessage);
+				res.append('\n');
+			}
+		}
+		if (res.length() == 0) {
+			return null;
+		} else {
+			return res.toString();
+		}
+	}
+
+	@Override
+	public IContextInformationValidator getContextInformationValidator() {
+		return null;
+	}
+
+}
\ No newline at end of file
diff --git a/org.eclipse.ui.genericeditor/src/org/eclipse/ui/internal/genericeditor/ContentAssistProcessorRegistry.java b/org.eclipse.ui.genericeditor/src/org/eclipse/ui/internal/genericeditor/ContentAssistProcessorRegistry.java
new file mode 100644
index 00000000000..a81cecbf8f0
--- /dev/null
+++ b/org.eclipse.ui.genericeditor/src/org/eclipse/ui/internal/genericeditor/ContentAssistProcessorRegistry.java
@@ -0,0 +1,195 @@
+/*******************************************************************************
+ * Copyright (c) 2016 Red Hat Inc. 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
+ *
+ * Contributors:
+ * - Mickael Istria (Red Hat Inc.)
+ *******************************************************************************/
+package org.eclipse.ui.internal.genericeditor;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.IConfigurationElement;
+import org.eclipse.core.runtime.IRegistryChangeEvent;
+import org.eclipse.core.runtime.IRegistryChangeListener;
+import org.eclipse.core.runtime.IStatus;
+import org.eclipse.core.runtime.Platform;
+import org.eclipse.core.runtime.Status;
+import org.eclipse.core.runtime.content.IContentType;
+import org.eclipse.core.runtime.content.IContentTypeManager;
+import org.eclipse.jface.text.ITextViewer;
+import org.eclipse.jface.text.contentassist.ICompletionProposal;
+import org.eclipse.jface.text.contentassist.IContentAssistProcessor;
+import org.eclipse.jface.text.contentassist.IContextInformation;
+import org.eclipse.jface.text.contentassist.IContextInformationValidator;
+import org.eclipse.jface.text.source.ISourceViewer;
+import org.eclipse.ui.IEditorInput;
+import org.eclipse.ui.PlatformUI;
+
+/**
+ * A registry of content assist processors provided by extension <code>org.eclipse.ui.genericeditor.contentAssistProcessors</code>.
+ * Those extensions are specific to a given {@link IContentType}.
+ * 
+ * @since 1.0
+ */
+public class ContentAssistProcessorRegistry {
+
+	private static final String EXTENSION_POINT_ID = GenericEditorPlugin.BUNDLE_ID + ".contentAssistProcessors"; //$NON-NLS-1$
+	
+	/**
+	 * This class wraps and proxies an {@link IContentAssistProcessor} provided through extensions
+	 * and loads it lazily when it can contribute to the editor, then delegates all operations to
+	 * actual processor.
+	 * When the contribution cannot contribute to the editor, this wrapper will return neutral values
+	 * that don't affect editor behavior.
+	 */
+	private static class ContentAssistProcessorExtension implements IContentAssistProcessor {
+		private static final String CONTENT_TYPE_ATTRIBUTE = "contentType"; //$NON-NLS-1$
+		private static final String CLASS_ATTRIBUTE = "class"; //$NON-NLS-1$
+
+		private IConfigurationElement extension;
+		private IContentType targetContentType;
+
+		private IContentAssistProcessor delegate;
+
+		private ContentAssistProcessorExtension(IConfigurationElement element) throws Exception {
+			this.extension = element;
+			this.targetContentType = Platform.getContentTypeManager().getContentType(element.getAttribute(CONTENT_TYPE_ATTRIBUTE));
+		}
+
+		private IContentAssistProcessor getDelegate() {
+			if (this.delegate == null) {
+				try {
+					this.delegate = (IContentAssistProcessor) extension.createExecutableExtension(CLASS_ATTRIBUTE);
+				} catch (CoreException e) {
+					e.printStackTrace();
+				}
+			}
+			return delegate;
+		}
+
+		/**
+		 * @return whether the referenced contribution should contribute to the current editor.
+		 */
+		public boolean isActive() {
+			IEditorInput input = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().getActiveEditor().getEditorInput();
+			IContentTypeManager contentTypeManager= Platform.getContentTypeManager();
+			for (IContentType currentContentType : contentTypeManager.findContentTypesFor(input.getName())) {
+				if (currentContentType.isKindOf(targetContentType)) {
+					return true;
+				}
+			}
+			return false;
+		}
+
+		@Override
+		public ICompletionProposal[] computeCompletionProposals(ITextViewer viewer, int offset) {
+			if (isActive()) {
+				return getDelegate().computeCompletionProposals(viewer, offset);
+			}
+			return new ICompletionProposal[0];
+		}
+
+		@Override
+		public IContextInformation[] computeContextInformation(ITextViewer viewer, int offset) {
+			if (isActive()) {
+				return getDelegate().computeContextInformation(viewer, offset);
+			}
+			return new IContextInformation[0];
+		}
+
+		@Override
+		public char[] getCompletionProposalAutoActivationCharacters() {
+			if (isActive()) {
+				return getDelegate().getCompletionProposalAutoActivationCharacters();
+			}
+			return null;
+		}
+
+		@Override
+		public char[] getContextInformationAutoActivationCharacters() {
+			if (isActive()) {
+				return getDelegate().getContextInformationAutoActivationCharacters();
+			}
+			return null;
+		}
+
+		@Override
+		public String getErrorMessage() {
+			if (isActive()) {
+				return getDelegate().getErrorMessage();
+			}
+			return null;
+		}
+
+		@Override
+		public IContextInformationValidator getContextInformationValidator() {
+			if (isActive()) {
+				return getDelegate().getContextInformationValidator();
+			}
+			return null;
+		}
+	}
+
+	private Map<IConfigurationElement, ContentAssistProcessorExtension> extensions = new HashMap<>();
+	private boolean outOfSync = true;
+
+	/**
+	 * Creates the registry and binds it to the extension point.
+	 */
+	public ContentAssistProcessorRegistry() {
+		Platform.getExtensionRegistry().addRegistryChangeListener(new IRegistryChangeListener() {
+			@Override
+			public void registryChanged(IRegistryChangeEvent event) {
+				outOfSync = true;
+			}
+		}, EXTENSION_POINT_ID);
+	}
+
+	/**
+	 * Get the contributed {@link IContentAssistProcessor}s that are relevant to hook on source viewer according
+	 * to document content types. 
+	 * @param sourceViewer the source viewer we're hooking completion to.
+	 * @param contentTypes the content types of the document we're editing.
+	 * @return the list of {@link IContentAssistProcessor} contributed for at least one of the content types.
+	 */
+	public List<IContentAssistProcessor> getContentAssistProcessors(ISourceViewer sourceViewer, Set<IContentType> contentTypes) {
+		if (this.outOfSync) {
+			sync();
+		}
+		List<IContentAssistProcessor> res = new ArrayList<>();
+		for (ContentAssistProcessorExtension ext : this.extensions.values()) {
+			if (contentTypes.contains(ext.targetContentType)) {
+				res.add(ext);
+			}
+		}
+		return res;
+	}
+
+	private void sync() {
+		Set<IConfigurationElement> toRemoveExtensions = new HashSet<>(this.extensions.keySet());
+		for (IConfigurationElement extension : Platform.getExtensionRegistry().getConfigurationElementsFor(EXTENSION_POINT_ID)) {
+			toRemoveExtensions.remove(extension);
+			if (!this.extensions.containsKey(extension)) {
+				try {
+					this.extensions.put(extension, new ContentAssistProcessorExtension(extension));
+				} catch (Exception ex) {
+					GenericEditorPlugin.getDefault().getLog().log(new Status(IStatus.ERROR, GenericEditorPlugin.BUNDLE_ID, ex.getMessage(), ex));
+				}
+			}
+		}
+		for (IConfigurationElement toRemove : toRemoveExtensions) {
+			this.extensions.remove(toRemove);
+		}
+		this.outOfSync = false;
+	}
+}
diff --git a/org.eclipse.ui.genericeditor/src/org/eclipse/ui/internal/genericeditor/ExtensionBasedTextEditor.java b/org.eclipse.ui.genericeditor/src/org/eclipse/ui/internal/genericeditor/ExtensionBasedTextEditor.java
new file mode 100644
index 00000000000..467be5318d4
--- /dev/null
+++ b/org.eclipse.ui.genericeditor/src/org/eclipse/ui/internal/genericeditor/ExtensionBasedTextEditor.java
@@ -0,0 +1,37 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2016 Red Hat Inc. 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
+ *
+ * Contributors:
+ *   Sopot Cela, Mickael Istria (Red Hat Inc.) - initial implementation
+ *******************************************************************************/
+package org.eclipse.ui.internal.genericeditor;
+
+import org.eclipse.ui.editors.text.TextEditor;
+
+/**
+ * A generic code editor that is aimed at being extended by contributions. Behavior
+ * is supposed to be added via extensions, not by inheritance.
+ * 
+ * @since 1.0
+ */
+public class ExtensionBasedTextEditor extends TextEditor {
+
+	private static final String CONTEXT_ID = "org.eclipse.ui.genericeditor.genericEditorContext"; //$NON-NLS-1$
+
+	/**
+	 * 
+	 */
+	public ExtensionBasedTextEditor() {
+		setSourceViewerConfiguration(new ExtensionBasedTextViewerConfiguration(this, getPreferenceStore()));
+	}
+
+	@Override
+	protected void setKeyBindingScopes(String[] scopes) {
+		super.setKeyBindingScopes(new String[] { CONTEXT_ID });
+	}
+
+}
diff --git a/org.eclipse.ui.genericeditor/src/org/eclipse/ui/internal/genericeditor/ExtensionBasedTextViewerConfiguration.java b/org.eclipse.ui.genericeditor/src/org/eclipse/ui/internal/genericeditor/ExtensionBasedTextViewerConfiguration.java
new file mode 100644
index 00000000000..d8d2b21c423
--- /dev/null
+++ b/org.eclipse.ui.genericeditor/src/org/eclipse/ui/internal/genericeditor/ExtensionBasedTextViewerConfiguration.java
@@ -0,0 +1,98 @@
+/*******************************************************************************
+ * Copyright (c) 2016 Red Hat Inc. 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
+ *
+ * Contributors:
+ *   Sopot Cela, Mickael Istria (Red Hat Inc.) - initial implementation
+ *******************************************************************************/
+package org.eclipse.ui.internal.genericeditor;
+
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+import org.eclipse.core.runtime.Platform;
+import org.eclipse.core.runtime.content.IContentType;
+import org.eclipse.jface.preference.IPreferenceStore;
+import org.eclipse.jface.text.AbstractReusableInformationControlCreator;
+import org.eclipse.jface.text.DefaultInformationControl;
+import org.eclipse.jface.text.IDocument;
+import org.eclipse.jface.text.IInformationControl;
+import org.eclipse.jface.text.ITextHover;
+import org.eclipse.jface.text.contentassist.ContentAssistant;
+import org.eclipse.jface.text.contentassist.IContentAssistProcessor;
+import org.eclipse.jface.text.contentassist.IContentAssistant;
+import org.eclipse.jface.text.presentation.IPresentationReconciler;
+import org.eclipse.jface.text.source.ISourceViewer;
+import org.eclipse.swt.widgets.Shell;
+import org.eclipse.ui.IEditorPart;
+import org.eclipse.ui.editors.text.TextSourceViewerConfiguration;
+
+/**
+ * The configuration of the {@link ExtensionBasedTextEditor}. It registers the proxy composite
+ * for hover, completion, syntax highlighting, and then those proxy take care of resolving to
+ * the right extensions on-demand.
+ * 
+ * @since 1.0
+ */
+public final class ExtensionBasedTextViewerConfiguration extends TextSourceViewerConfiguration {
+
+	private IEditorPart editor;
+	private Set<IContentType> contentTypes;
+
+	/**
+	 * 
+	 * @param editor the editor we're creating.
+	 * @param preferenceStore the preference store.
+	 */
+	public ExtensionBasedTextViewerConfiguration(IEditorPart editor, IPreferenceStore preferenceStore) {
+		super(preferenceStore);
+		this.editor = editor;
+	}
+
+	private Set<IContentType> getContentTypes() {
+		if (this.contentTypes == null) {
+			this.contentTypes = new HashSet<>(Arrays.asList(Platform.getContentTypeManager().findContentTypesFor(editor.getEditorInput().getName())));
+		}
+		return this.contentTypes;
+	}
+
+	@Override
+	public ITextHover getTextHover(ISourceViewer sourceViewer, String contentType) {
+		TextHoverRegistry registry= GenericEditorPlugin.getDefault().getHoverRegistry();
+		return registry.getAvailableHover(sourceViewer, getContentTypes());
+	}
+
+	@Override
+	public IContentAssistant getContentAssistant(ISourceViewer sourceViewer) {
+		ContentAssistProcessorRegistry registry= GenericEditorPlugin.getDefault().getContentAssistProcessorRegistry();
+		IContentAssistProcessor processor = new CompositeContentAssistProcessor(registry.getContentAssistProcessors(sourceViewer, getContentTypes()));
+		ContentAssistant res= new ContentAssistant();
+		res.setContextInformationPopupOrientation(ContentAssistant.CONTEXT_INFO_BELOW);
+		res.setProposalPopupOrientation(ContentAssistant.PROPOSAL_REMOVE);
+		res.enableColoredLabels(true);
+		res.setContentAssistProcessor(processor, IDocument.DEFAULT_CONTENT_TYPE);
+		res.setInformationControlCreator(new AbstractReusableInformationControlCreator() {
+			@Override
+			protected IInformationControl doCreateInformationControl(Shell parent) {
+				return new DefaultInformationControl(parent);
+			}
+		});
+		return res;
+	}
+
+	@Override
+	public IPresentationReconciler getPresentationReconciler(ISourceViewer sourceViewer) {
+		PresentationReconcilerRegistry registry = GenericEditorPlugin.getDefault().getPresentationReconcilerRegistry();
+		List<IPresentationReconciler> reconciliers = registry.getPresentationReconcilers(sourceViewer, getContentTypes());
+		if (!reconciliers.isEmpty()) {
+			return reconciliers.get(0);
+		}
+		return null;
+	}
+
+}
diff --git a/org.eclipse.ui.genericeditor/src/org/eclipse/ui/internal/genericeditor/GenericEditorPlugin.java b/org.eclipse.ui.genericeditor/src/org/eclipse/ui/internal/genericeditor/GenericEditorPlugin.java
new file mode 100644
index 00000000000..e5f33d470cc
--- /dev/null
+++ b/org.eclipse.ui.genericeditor/src/org/eclipse/ui/internal/genericeditor/GenericEditorPlugin.java
@@ -0,0 +1,82 @@
+/*******************************************************************************
+ * Copyright (c) 2016 Red Hat Inc. 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
+ *
+ * Contributors:
+ *   Sopot Cela, Mickael Istria (Red Hat Inc.) - initial implementation
+ *******************************************************************************/
+package org.eclipse.ui.internal.genericeditor;
+
+import org.eclipse.jface.text.ITextHover;
+import org.eclipse.jface.text.contentassist.IContentAssistProcessor;
+import org.eclipse.jface.text.presentation.IPresentationReconciler;
+import org.eclipse.ui.plugin.AbstractUIPlugin;
+import org.osgi.framework.BundleContext;
+
+/**
+ * Generic editor plugin activator and singletons.
+ * 
+ * @since 1.0
+ */
+public class GenericEditorPlugin extends AbstractUIPlugin {
+
+	public static final String BUNDLE_ID = "org.eclipse.ui.genericeditor"; //$NON-NLS-1$
+
+	private static GenericEditorPlugin INSTANCE;
+
+	private TextHoverRegistry textHoversRegistry;
+	private ContentAssistProcessorRegistry contentAssistProcessorsRegistry;
+	private PresentationReconcilerRegistry presentationReconcilierRegistry;
+
+	@Override
+	public void start(BundleContext context) throws Exception{
+		INSTANCE = this;
+		super.start(context);
+	}
+
+	@Override
+	public void stop(BundleContext context) throws Exception {
+		super.stop(context);
+		INSTANCE = null;
+	}
+
+	public static GenericEditorPlugin getDefault() {
+		return INSTANCE;
+	}
+
+	/**
+	 * @return the registry allowing to access contributed {@link ITextHover}s.
+	 * @since 1.0
+	 */
+	public synchronized TextHoverRegistry getHoverRegistry() {
+		if (this.textHoversRegistry == null) {
+			this.textHoversRegistry = new TextHoverRegistry(getPreferenceStore());
+		}
+		return this.textHoversRegistry;
+	}
+
+	/**
+	 * @return the registry allowing to access contributed {@link IContentAssistProcessor}s.
+	 * @since 1.0
+	 */
+	public synchronized ContentAssistProcessorRegistry getContentAssistProcessorRegistry() {
+		if (this.contentAssistProcessorsRegistry == null) {
+			this.contentAssistProcessorsRegistry = new ContentAssistProcessorRegistry();
+		}
+		return this.contentAssistProcessorsRegistry;
+	}
+
+	/**
+	 * @return the registry allowing to access contributed {@link IPresentationReconciler}s.
+	 * @since 1.0
+	 */
+	public synchronized PresentationReconcilerRegistry getPresentationReconcilerRegistry() {
+		if (this.presentationReconcilierRegistry == null) {
+			this.presentationReconcilierRegistry = new PresentationReconcilerRegistry();
+		}
+		return this.presentationReconcilierRegistry;
+	}
+}
diff --git a/org.eclipse.ui.genericeditor/src/org/eclipse/ui/internal/genericeditor/PresentationReconcilerRegistry.java b/org.eclipse.ui.genericeditor/src/org/eclipse/ui/internal/genericeditor/PresentationReconcilerRegistry.java
new file mode 100644
index 00000000000..b973b816cf2
--- /dev/null
+++ b/org.eclipse.ui.genericeditor/src/org/eclipse/ui/internal/genericeditor/PresentationReconcilerRegistry.java
@@ -0,0 +1,149 @@
+/*******************************************************************************
+ * Copyright (c) 2016 Red Hat Inc. 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
+ *
+ * Contributors:
+ *   Sopot Cela, Mickael Istria (Red Hat Inc.) - initial implementation
+ *******************************************************************************/
+package org.eclipse.ui.internal.genericeditor;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.IConfigurationElement;
+import org.eclipse.core.runtime.IRegistryChangeEvent;
+import org.eclipse.core.runtime.IRegistryChangeListener;
+import org.eclipse.core.runtime.IStatus;
+import org.eclipse.core.runtime.Platform;
+import org.eclipse.core.runtime.Status;
+import org.eclipse.core.runtime.content.IContentType;
+import org.eclipse.jface.text.ITextViewer;
+import org.eclipse.jface.text.presentation.IPresentationDamager;
+import org.eclipse.jface.text.presentation.IPresentationReconciler;
+import org.eclipse.jface.text.presentation.IPresentationRepairer;
+import org.eclipse.jface.text.source.ISourceViewer;
+
+/**
+ * A registry of presentation reconciliers provided by extension <code>org.eclipse.ui.genericeditor.presentationReconcilers</code>.
+ * Those extensions are specific to a given {@link IContentType}.
+ * 
+ * @since 1.0
+ */
+public class PresentationReconcilerRegistry {
+
+	private static final String EXTENSION_POINT_ID = GenericEditorPlugin.BUNDLE_ID + ".presentationReconcilers"; //$NON-NLS-1$
+
+	/**
+	 * This class wraps and proxies an {@link IPresentationReconcilier} provided through extensions
+	 * and loads it lazily when it can contribute to the editor, then delegates all operations to
+	 * actual reconcilier.
+	 */
+	private static class PresentationReconcilerExtension implements IPresentationReconciler {
+		private static final String CLASS_ATTRIBUTE = "class"; //$NON-NLS-1$
+		private static final String CONTENT_TYPE_ATTRIBUTE = "contentType"; //$NON-NLS-1$
+
+		private IConfigurationElement extension;
+		private IContentType targetContentType;
+
+		private IPresentationReconciler delegate;
+
+		private PresentationReconcilerExtension(IConfigurationElement element) throws Exception {
+			this.extension = element;
+			this.targetContentType = Platform.getContentTypeManager().getContentType(element.getAttribute(CONTENT_TYPE_ATTRIBUTE));
+		}
+
+		private IPresentationReconciler getDelegate() {
+			if (this.delegate == null) {
+				try {
+					this.delegate = (IPresentationReconciler) extension.createExecutableExtension(CLASS_ATTRIBUTE);
+				} catch (CoreException e) {
+					e.printStackTrace();
+				}
+			}
+			return delegate;
+		}
+
+		@Override
+		public void install(ITextViewer viewer) {
+			getDelegate().install(viewer);
+		}
+
+		@Override
+		public void uninstall() {
+			getDelegate().uninstall();
+		}
+
+		@Override
+		public IPresentationDamager getDamager(String contentType) {
+			return getDelegate().getDamager(contentType);
+
+		}
+
+		@Override
+		public IPresentationRepairer getRepairer(String contentType) {
+			return getDelegate().getRepairer(contentType);
+		}
+
+	}
+	private Map<IConfigurationElement, PresentationReconcilerExtension> extensions = new HashMap<>();
+	private boolean outOfSync = true;
+
+	/**
+	 * Creates the registry and binds it to the extension point.
+	 */
+	public PresentationReconcilerRegistry() {
+		Platform.getExtensionRegistry().addRegistryChangeListener(new IRegistryChangeListener() {
+			@Override
+			public void registryChanged(IRegistryChangeEvent event) {
+				outOfSync = true;
+			}
+		}, EXTENSION_POINT_ID);
+	}
+
+	/**
+	 * Get the contributed {@link IPresentationReconciliers}s that are relevant to hook on source viewer according
+	 * to document content types. 
+	 * @param sourceViewer the source viewer we're hooking completion to.
+	 * @param contentTypes the content types of the document we're editing.
+	 * @return the list of {@link IPresentationReconciler} contributed for at least one of the content types.
+	 */
+	public List<IPresentationReconciler> getPresentationReconcilers(ISourceViewer sourceViewer, Set<IContentType> contentTypes) {
+		if (this.outOfSync) {
+			sync();
+		}
+		List<IPresentationReconciler> res = new ArrayList<>();
+		for (PresentationReconcilerExtension ext : this.extensions.values()) {
+			if (contentTypes.contains(ext.targetContentType)) {
+				res.add(ext);
+			}
+		}
+		return res;
+	}
+
+	private void sync() {
+		Set<IConfigurationElement> toRemoveExtensions = new HashSet<>(this.extensions.keySet());
+		for (IConfigurationElement extension : Platform.getExtensionRegistry().getConfigurationElementsFor(EXTENSION_POINT_ID)) {
+			toRemoveExtensions.remove(extension);
+			if (!this.extensions.containsKey(extension)) {
+				try {
+					this.extensions.put(extension, new PresentationReconcilerExtension(extension));
+				} catch (Exception ex) {
+					GenericEditorPlugin.getDefault().getLog().log(new Status(IStatus.ERROR, GenericEditorPlugin.BUNDLE_ID, ex.getMessage(), ex));
+				}
+			}
+		}
+		for (IConfigurationElement toRemove : toRemoveExtensions) {
+			this.extensions.remove(toRemove);
+		}
+		this.outOfSync = false;
+	}
+
+}
diff --git a/org.eclipse.ui.genericeditor/src/org/eclipse/ui/internal/genericeditor/TextHoverRegistry.java b/org.eclipse.ui.genericeditor/src/org/eclipse/ui/internal/genericeditor/TextHoverRegistry.java
new file mode 100644
index 00000000000..88e4825f66c
--- /dev/null
+++ b/org.eclipse.ui.genericeditor/src/org/eclipse/ui/internal/genericeditor/TextHoverRegistry.java
@@ -0,0 +1,111 @@
+/*******************************************************************************
+ * Copyright (c) 2016 Red Hat Inc. 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
+ *
+ * Contributors:
+ * - Mickael Istria (Red Hat Inc.)
+ *******************************************************************************/
+package org.eclipse.ui.internal.genericeditor;
+
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.IConfigurationElement;
+import org.eclipse.core.runtime.IRegistryChangeEvent;
+import org.eclipse.core.runtime.IRegistryChangeListener;
+import org.eclipse.core.runtime.IStatus;
+import org.eclipse.core.runtime.Platform;
+import org.eclipse.core.runtime.Status;
+import org.eclipse.core.runtime.content.IContentType;
+import org.eclipse.jface.preference.IPreferenceStore;
+import org.eclipse.jface.text.ITextHover;
+import org.eclipse.jface.text.source.ISourceViewer;
+
+/**
+ * Text hover registry that manages the detectors
+ * contributed by the <code>org.eclipse.ui.workbench.texteditor.hoverProvider</code> extension point for
+ * targets contributed by the <code>org.eclipse.ui.workbench.texteditor.hyperlinkDetectorTargets</code> extension point.
+ *
+ * @since 1.0
+ */
+public final class TextHoverRegistry {
+
+	private static final String EXTENSION_POINT_ID = GenericEditorPlugin.BUNDLE_ID + ".hoverProviders"; //$NON-NLS-1$
+
+	private Map<IConfigurationElement, TextHoverExtension> extensions = new HashMap<>();
+	private boolean outOfSync = true;
+
+	private static class TextHoverExtension {
+		private static final String CONTENT_TYPE_ATTRIBUTE = "contentType"; //$NON-NLS-1$
+		private static final String CLASS_ATTRIBUTE = "class"; //$NON-NLS-1$
+
+		private IConfigurationElement extension;
+		private IContentType targetContentType;
+		private ITextHover delegate;
+
+		public TextHoverExtension(IConfigurationElement extension) throws Exception {
+			this.extension = extension;
+			this.targetContentType = Platform.getContentTypeManager().getContentType(extension.getAttribute(CONTENT_TYPE_ATTRIBUTE));
+		}
+
+		private ITextHover getDelegate() {
+			if (this.delegate == null) {
+				try {
+					this.delegate = (ITextHover) extension.createExecutableExtension(CLASS_ATTRIBUTE);
+				} catch (CoreException e) {
+					e.printStackTrace();
+				}
+			}
+			return delegate;
+		}
+
+	}
+
+	public TextHoverRegistry(IPreferenceStore preferenceStore) {
+		Platform.getExtensionRegistry().addRegistryChangeListener(new IRegistryChangeListener() {
+			@Override
+			public void registryChanged(IRegistryChangeEvent event) {
+				outOfSync = true;
+			}
+		}, EXTENSION_POINT_ID);
+	}
+
+	public ITextHover getAvailableHover(ISourceViewer sourceViewer, Set<IContentType> contentTypes) {
+		if (this.outOfSync) {
+			sync();
+		}
+		// TODO rather that returning the 1st active hover, consider
+		// supporting compound/aggregated hovers.
+		for (TextHoverExtension ext : this.extensions.values()) {
+			if (contentTypes.contains(ext.targetContentType)) {
+				return ext.getDelegate();
+			}
+		}
+		return null;
+	}
+
+	private void sync() {
+		Set<IConfigurationElement> toRemoveExtensions = new HashSet<>(this.extensions.keySet());
+		for (IConfigurationElement extension : Platform.getExtensionRegistry().getConfigurationElementsFor(EXTENSION_POINT_ID)) {
+			toRemoveExtensions.remove(extension);
+			if (!this.extensions.containsKey(extension)) {
+				try {
+					this.extensions.put(extension, new TextHoverExtension(extension));
+				} catch (Exception ex) {
+					GenericEditorPlugin.getDefault().getLog().log(new Status(IStatus.ERROR, GenericEditorPlugin.BUNDLE_ID, ex.getMessage(), ex));
+				}
+			}
+		}
+		for (IConfigurationElement toRemove : toRemoveExtensions) {
+			this.extensions.remove(toRemove);
+		}
+		this.outOfSync = false;
+	}
+
+}