bundles/org.simantics.scl.ui/src/org/simantics/scl/ui/assist/SCLContentProposalProvider.java

   1 package org.simantics.scl.ui.assist;
   2
   3 import java.util.ArrayList;
   4 import java.util.List;
   5 import java.util.Map;
   6
   7 import org.eclipse.jface.fieldassist.IContentProposal;
   8 import org.eclipse.jface.fieldassist.IContentProposalProvider;
   9 import org.simantics.scl.compiler.commands.CommandSession;
  10 import org.simantics.scl.compiler.elaboration.modules.SCLValue;
  11 import org.simantics.scl.compiler.environment.Environments;
  12 import org.simantics.scl.compiler.types.Type;
  13
  14
  15 public class SCLContentProposalProvider implements IContentProposalProvider {
  16
  17     private final CommandSession session;
  18
  19     public SCLContentProposalProvider(CommandSession session) {
  20         this.session = session;
  21     }
  22
  23     @Override
  24     public IContentProposal[] getProposals(String contents, int position) {
  25         int startPos = getPrefixStartPos(contents, position);
  26         String prefix = contents.substring(startPos, position);
  27         int prefixLength = prefix.length();
  28         int namespaceLength = prefix.indexOf('.');
  29         if(namespaceLength < 0)
  30             namespaceLength = 0;
  31         else
  32             ++namespaceLength;
  33
  34         List<SCLValue> values = Environments.findValuesForPrefix(
  35                 session.getRuntimeEnvironment().getEnvironment(),
  36                 prefix);
  37
  38         ArrayList<IContentProposal> proposals = new ArrayList<IContentProposal>();
  39         for(SCLValue value : values)
  40             if(!value.isPrivate() && !(value.getName().name.contains("$") && //$NON-NLS-1$
  41                     Character.isLetter(value.getName().name.charAt(0))))
  42                 proposals.add(new SCLContentProposal(value));
  43
  44         prefix = prefix.toLowerCase();
  45         for(Map.Entry<String,Type> entry : session.localNamesForContentProposals().entrySet())
  46             if(entry.getKey().toLowerCase().startsWith(prefix))
  47                 proposals.add(new SCLContentProposal(entry.getKey(), "LocalEnvironment", entry.getValue())); //$NON-NLS-1$
  48
  49         return proposals.toArray(new IContentProposal[proposals.size()]);
  50     }
  51
  52     private static int getPrefixStartPos(String contents, int position) {
  53         int pos = position;
  54         while(pos > 0) {
  55             char c = contents.charAt(pos-1);
  56             if(Character.isJavaIdentifierPart(c) || c == '.')
  57                 --pos;
  58             else
  59                 break;
  60         }
  61         return pos;
  62     }
  63 }