From 4b511c67ae1f44762c21fdbe4b37a182927ddb4b Mon Sep 17 00:00:00 2001
From: Doug Schaefer <doug.schaefer@windriver.com>
Date: Mon, 25 Apr 2005 18:35:52 +0000
Subject: [PATCH] Hooked up the C Help system to the new content assist.

---
 core/org.eclipse.cdt.ui/plugin.xml            |   4 +
 .../HelpCompletionContributor.java            | 104 ++++++++++++++++++
 2 files changed, 108 insertions(+)
 create mode 100644 core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/text/contentassist/HelpCompletionContributor.java

diff --git a/core/org.eclipse.cdt.ui/plugin.xml b/core/org.eclipse.cdt.ui/plugin.xml
index 54060e4d2f3..c8570c06466 100644
--- a/core/org.eclipse.cdt.ui/plugin.xml
+++ b/core/org.eclipse.cdt.ui/plugin.xml
@@ -1365,6 +1365,10 @@
             class="org.eclipse.cdt.internal.ui.text.contentassist.SearchCompletionContributor"
             id="Search"
             priority="3"/>
+      <contributor
+            class="org.eclipse.cdt.internal.ui.text.contentassist.HelpCompletionContributor"
+            id="Help"
+            priority="99"/>
    	</extension>
 
 </plugin>
diff --git a/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/text/contentassist/HelpCompletionContributor.java b/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/text/contentassist/HelpCompletionContributor.java
new file mode 100644
index 00000000000..dffb43101fa
--- /dev/null
+++ b/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/text/contentassist/HelpCompletionContributor.java
@@ -0,0 +1,104 @@
+/**********************************************************************
+ * Copyright (c) 2004 IBM Corporation and others.
+ * All rights reserved.   This program and the accompanying materials
+ * are made available under the terms of the Common Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/cpl-v10.html
+ **********************************************************************/
+package org.eclipse.cdt.internal.ui.text.contentassist;
+
+import java.util.List;
+
+import org.eclipse.cdt.core.dom.ast.ASTCompletionNode;
+import org.eclipse.cdt.core.dom.ast.IASTFieldReference;
+import org.eclipse.cdt.core.dom.ast.IASTName;
+import org.eclipse.cdt.core.model.ITranslationUnit;
+import org.eclipse.cdt.core.model.IWorkingCopy;
+import org.eclipse.cdt.internal.ui.CHelpProviderManager;
+import org.eclipse.cdt.internal.ui.CPluginImages;
+import org.eclipse.cdt.internal.ui.viewsupport.CElementImageProvider;
+import org.eclipse.cdt.ui.CUIPlugin;
+import org.eclipse.cdt.ui.IFunctionSummary;
+import org.eclipse.cdt.ui.text.ICHelpInvocationContext;
+import org.eclipse.cdt.ui.text.contentassist.ICompletionContributor;
+import org.eclipse.core.resources.IProject;
+import org.eclipse.jface.text.ITextViewer;
+import org.eclipse.jface.text.contentassist.ContextInformation;
+import org.eclipse.swt.graphics.Image;
+
+public class HelpCompletionContributor implements ICompletionContributor {
+
+	public void contributeCompletionProposals(ITextViewer viewer, int offset,
+			IWorkingCopy workingCopy, ASTCompletionNode completionNode,
+			List proposals)
+	{
+		final IWorkingCopy fWorkingCopy = workingCopy;
+		if (completionNode != null) {
+			// Find matching functions
+			ICHelpInvocationContext context = new ICHelpInvocationContext() {
+
+				public IProject getProject() {
+					return fWorkingCopy.getCProject().getProject();
+				}
+
+				public ITranslationUnit getTranslationUnit() {
+					return fWorkingCopy.getTranslationUnit();
+				}	
+			};
+			
+			IASTName[] names = completionNode.getNames();
+			for (int i = 0; i < names.length; ++i) {
+				IASTName name = names[i];
+				
+				if (name.getTranslationUnit() == null)
+					// Not connected
+					continue;
+			
+				// ignore if this is a member access
+				if (name.getParent() instanceof IASTFieldReference)
+					continue;
+
+				String prefix = new String(name.toCharArray());
+				
+				IFunctionSummary[] summaries = CHelpProviderManager.getDefault().getMatchingFunctions(context, prefix);
+				if (summaries == null )
+					continue;
+				
+				int repOffset = offset - prefix.length();
+				int repLength = prefix.length();
+				Image image = CUIPlugin.getImageDescriptorRegistry().get(CElementImageProvider.getFunctionImageDescriptor());
+
+				for (int j = 0; j < summaries.length; j++) {
+					IFunctionSummary summary = summaries[j];
+					String fname = summary.getName() + "()"; //$NON-NLS-1$
+					String fdesc = summary.getDescription();
+					IFunctionSummary.IFunctionPrototypeSummary fproto = summary.getPrototype();
+					String fargs = fproto.getArguments();
+					
+					CCompletionProposal proposal;
+					proposal = new CCompletionProposal(fname, 
+													   repOffset, 
+													   repLength,
+													   image, 
+													   fproto.getPrototypeString(true),
+													   2,
+													   viewer);
+
+					if (fdesc != null) {
+						proposal.setAdditionalProposalInfo(fdesc);
+					}
+					
+					if (fargs != null && fargs.length() > 0) {
+						proposal.setContextInformation(new ContextInformation(fname, fargs));
+						// set the cursor before the closing bracket
+						proposal.setCursorPosition(fname.length() - 1);
+					}
+
+					proposals.add(proposal);
+				}
+
+			}
+		}
+	}
+
+}