Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.scl.ui / src / org / simantics / scl / ui / editor / completion / SCLCompletionAssistProcessor.java

diff --git a/bundles/org.simantics.scl.ui/src/org/simantics/scl/ui/editor/completion/SCLCompletionAssistProcessor.java b/bundles/org.simantics.scl.ui/src/org/simantics/scl/ui/editor/completion/SCLCompletionAssistProcessor.java
new file mode 100644 (file)
index 0000000..8d9a56b
--- /dev/null
+++ b/bundles/org.simantics.scl.ui/src/org/simantics/scl/ui/editor/completion/SCLCompletionAssistProcessor.java
@@ -0,0 +1,79 @@
+package org.simantics.scl.ui.editor.completion;\r
+\r
+import org.eclipse.jface.text.BadLocationException;\r
+import org.eclipse.jface.text.IDocument;\r
+import org.eclipse.jface.text.ITextSelection;\r
+import org.eclipse.jface.text.ITextViewer;\r
+import org.eclipse.jface.text.contentassist.ICompletionProposal;\r
+import org.eclipse.jface.text.contentassist.IContentAssistProcessor;\r
+import org.eclipse.jface.text.contentassist.IContextInformation;\r
+import org.eclipse.jface.text.contentassist.IContextInformationValidator;\r
+\r
+public class SCLCompletionAssistProcessor implements IContentAssistProcessor {\r
+    \r
+//    private String lastPrefix = null;\r
+    private String lastError = "";\r
+    private SCLTextEditorEnvironment sclTextEditorEnvironment;\r
+    \r
+    public SCLCompletionAssistProcessor(SCLTextEditorEnvironment sclTextEditorEnvironment) {\r
+        this.sclTextEditorEnvironment = sclTextEditorEnvironment;\r
+    }\r
+\r
+    @Override\r
+    public ICompletionProposal[] computeCompletionProposals(ITextViewer viewer, int tmpOffset) {\r
+        ITextSelection selection= (ITextSelection) viewer.getSelectionProvider().getSelection();\r
+        // adjust offset to end of normalized selection\r
+        if (selection.getOffset() == tmpOffset)\r
+            tmpOffset = selection.getOffset() + selection.getLength();\r
+        final int offset = tmpOffset;\r
+        IDocument document = viewer.getDocument();\r
+        String tmpPrefix = "";\r
+        try {\r
+            tmpPrefix = getPrefix(document, offset);\r
+        } catch (BadLocationException e) {\r
+            e.printStackTrace();\r
+        }\r
+        sclTextEditorEnvironment.updateEnvironment(document);\r
+        return sclTextEditorEnvironment.getCompletionProposals(tmpPrefix, offset);\r
+    }\r
+    \r
+    private static String getPrefix(IDocument doc, int offset) throws BadLocationException {\r
+        int docLen = doc.getLength();\r
+        if (doc == null || offset > docLen || docLen == 0)\r
+            return "";\r
+\r
+        int length= 0;\r
+        while (--offset >= 0 && Character.isJavaIdentifierPart(doc.getChar(offset)) || doc.getChar(offset) == '.')\r
+            length++;\r
+\r
+        return doc.get(offset + 1, length);\r
+    }\r
+    \r
+    @Override\r
+    public IContextInformation[] computeContextInformation(ITextViewer viewer, int offset) {\r
+        return null;\r
+    }\r
+\r
+    private static final char[] AUTO_ACTIVATION_CHARS = new char[] { '.', '(' };\r
+    \r
+    @Override\r
+    public char[] getCompletionProposalAutoActivationCharacters() {\r
+        return AUTO_ACTIVATION_CHARS;\r
+    }\r
+\r
+    @Override\r
+    public char[] getContextInformationAutoActivationCharacters() {\r
+        return null;\r
+    }\r
+\r
+    @Override\r
+    public String getErrorMessage() {\r
+        return lastError;\r
+    }\r
+\r
+    @Override\r
+    public IContextInformationValidator getContextInformationValidator() {\r
+        return null;\r
+    }\r
+\r
+}\r