Bug 399985: Semantic highlighting for qt signals/slots

The signals, slots, Q_SIGNALS, and Q_SLOTS macros are
used as 'keywords' when developing Qt applications.  This
patch adds a semantic highlighter for these keywords in
projects with a qtnature.

Change-Id: I7a5906aa69e6d7dab4ce20a16b425ae177f9bd25
Reviewed-on: https://git.eclipse.org/r/10179
Reviewed-by: Doug Schaefer <dschaefer@qnx.com>
IP-Clean: Doug Schaefer <dschaefer@qnx.com>
Tested-by: Doug Schaefer <dschaefer@qnx.com>

qt/org.eclipse.cdt.qt.core/META-INF/MANIFEST.MF

@@ -11,3 +11,4 @@ Require-Bundle: org.eclipse.core.runtime,
 Bundle-RequiredExecutionEnvironment: JavaSE-1.6
 Bundle-ActivationPolicy: lazy
 Bundle-Localization: plugin
+Export-Package: org.eclipse.cdt.qt.core

qt/org.eclipse.cdt.qt.core/src/org/eclipse/cdt/qt/core/QtKeywords.java

@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2013 QNX Software Systems 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.cdt.qt.core;
+
+/**
+ * Declares constants related to tokens that are special in Qt applications.
+ */
+public class QtKeywords
+{
+    public static final String Q_SIGNALS = "Q_SIGNALS";
+    public static final String Q_SLOTS = "Q_SLOTS";
+    public static final String SIGNALS = "signals";
+    public static final String SLOTS = "slots";
+}

qt/org.eclipse.cdt.qt.ui/META-INF/MANIFEST.MF

@@ -1,11 +1,15 @@
 Manifest-Version: 1.0
 Bundle-ManifestVersion: 2
 Bundle-Name: CDT Qt Support UI
-Bundle-SymbolicName: org.eclipse.cdt.qt.ui
+Bundle-SymbolicName: org.eclipse.cdt.qt.ui;singleton:=true
 Bundle-Version: 1.0.0.qualifier
 Bundle-Activator: org.eclipse.cdt.qt.ui.Activator
 Bundle-Vendor: Eclipse CDT
+Bundle-Localization: plugin
 Require-Bundle: org.eclipse.ui,
- org.eclipse.core.runtime
+ org.eclipse.core.runtime,
+ org.eclipse.cdt.ui,
+ org.eclipse.cdt.core,
+ org.eclipse.cdt.qt.core
 Bundle-RequiredExecutionEnvironment: JavaSE-1.6
 Bundle-ActivationPolicy: lazy

qt/org.eclipse.cdt.qt.ui/build.properties

@@ -1,4 +1,6 @@
 source.. = src/
 output.. = bin/
 bin.includes = META-INF/,\
-               .
+               .,\
+               plugin.xml,\
+               plugin.properties

qt/org.eclipse.cdt.qt.ui/plugin.properties

@@ -0,0 +1,8 @@
+# Copyright (c) 2013 QNX Software Systems 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
+
+qtHighlighting.extName=Qt Semantic Highlighting
+qtHighlighting.displayName=Qt Keywords

qt/org.eclipse.cdt.qt.ui/plugin.xml

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<?eclipse version="3.4"?>
+<plugin>
+    <extension
+        point="org.eclipse.cdt.ui.semanticHighlighting"
+        name="%qtHighlighting.extName"
+        id="org.eclipse.cdt.qt.ui.semanticHighlightings">
+        <semanticHighlighting
+            id="org.eclipse.cdt.qt.ui.keywordHighlighting"
+            priority="5"
+            class="org.eclipse.cdt.internal.qt.ui.QtHighlighting"
+            preferenceKey="qt-keywords"
+            displayName="%qtHighlighting.displayName"
+            defaultTextColor="127,0,85"
+            defaultBold="true"
+            defaultEnabled="true">
+            <enablement>
+                <with variable="projectNatures">
+                    <iterate operator="or">
+                        <equals value="org.eclipse.cdt.qt.core.qtNature"/>
+                    </iterate>
+                </with>
+            </enablement>
+        </semanticHighlighting>
+    </extension>
+</plugin>

qt/org.eclipse.cdt.qt.ui/src/org/eclipse/cdt/internal/qt/ui/QtHighlighting.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2013 QNX Software Systems 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.cdt.internal.qt.ui;
+
+import org.eclipse.cdt.core.dom.ast.IASTName;
+import org.eclipse.cdt.core.dom.ast.IASTNode;
+import org.eclipse.cdt.core.dom.ast.IBinding;
+import org.eclipse.cdt.core.dom.ast.IMacroBinding;
+import org.eclipse.cdt.qt.core.QtKeywords;
+import org.eclipse.cdt.ui.text.ISemanticHighlighter;
+import org.eclipse.cdt.ui.text.ISemanticToken;
+
+public class QtHighlighting implements ISemanticHighlighter
+{
+    @Override
+    public boolean consumes( ISemanticToken token )
+    {
+        IBinding binding = token.getBinding();
+        if( binding instanceof IMacroBinding )
+        {
+            IASTNode node = token.getNode();
+            if( node instanceof IASTName && ( (IASTName)node ).isReference() )
+            {
+                String n = binding.getName();
+                return QtKeywords.SIGNALS.equals( n )   || QtKeywords.SLOTS.equals( n )
+                    || QtKeywords.Q_SIGNALS.equals( n ) || QtKeywords.Q_SLOTS.equals( n );
+            }
+        }
+
+        return false;
+    }
+}