JDT codeassist module, nothing changed yet

[phpeclipse.git] / net.sourceforge.phpeclipse / src / net / sourceforge / phpdt / internal / codeassist / select / SelectionScanner.java

diff --git a/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/codeassist/select/SelectionScanner.java b/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/codeassist/select/SelectionScanner.java
new file mode 100644 (file)
index 0000000..fafb5e7
--- /dev/null
+++ b/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/codeassist/select/SelectionScanner.java
@@ -0,0 +1,68 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2001, 2002 International Business Machines Corp. and others.
+ * All rights reserved. This program and the accompanying materials 
+ * are made available under the terms of the Common Public License v0.5 
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/cpl-v05.html
+ * 
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ ******************************************************************************/
+package net.sourceforge.phpdt.internal.codeassist.select;
+
+/*
+ * Scanner aware of a selection range. If finding an identifier which source range is exactly
+ * the same, then will record it so that the parser can make use of it.
+ *
+ * Source positions are zero-based and inclusive.
+ */
+import net.sourceforge.phpdt.core.compiler.InvalidInputException;
+import net.sourceforge.phpdt.internal.compiler.parser.Scanner;
+
+public class SelectionScanner extends Scanner {
+
+       public char[] selectionIdentifier;
+       public int selectionStart, selectionEnd;
+/* 
+ * Truncate the current identifier if it is containing the cursor location. Since completion is performed
+ * on an identifier prefix.
+ *
+ */
+ 
+public SelectionScanner(boolean assertMode) {
+       super(false, false, false, assertMode);
+}
+
+public char[] getCurrentIdentifierSource() {
+
+       if (selectionIdentifier == null){
+               if (selectionStart == startPosition && selectionEnd == currentPosition-1){
+                       if (withoutUnicodePtr != 0){                    // check unicode scenario
+                               System.arraycopy(withoutUnicodeBuffer, 1, selectionIdentifier = new char[withoutUnicodePtr], 0, withoutUnicodePtr);
+                       } else {
+                               int length = currentPosition - startPosition;
+                               // no char[] sharing around completionIdentifier, we want it to be unique so as to use identity checks  
+                               System.arraycopy(source, startPosition, (selectionIdentifier = new char[length]), 0, length);
+                       }
+                       return selectionIdentifier;
+               }
+       }
+       return super.getCurrentIdentifierSource();
+}
+/*
+ * In case we actually read a keyword which corresponds to the selected
+ * range, we pretend we read an identifier.
+ */
+public int scanIdentifierOrKeyword() throws InvalidInputException {
+
+       int id = super.scanIdentifierOrKeyword();
+
+       // convert completed keyword into an identifier
+       if (id != TokenNameIdentifier
+               && startPosition == selectionStart 
+               && currentPosition == selectionEnd+1){
+               return TokenNameIdentifier;
+       }
+       return id;
+}
+}