1 files changed, 102 insertions, 0 deletions
diff --git a/BKUGuiExt/src/main/java/at/gv/egiz/bku/gui/ComparePinDocument.java b/BKUGuiExt/src/main/java/at/gv/egiz/bku/gui/ComparePinDocument.java
new file mode 100644
index 00000000..623f6fad
--- /dev/null
+++ b/BKUGuiExt/src/main/java/at/gv/egiz/bku/gui/ComparePinDocument.java
@@ -0,0 +1,102 @@
+/*
+ * Copyright 2008 Federal Chancellery Austria and
+ * Graz University of Technology
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package at.gv.egiz.bku.gui;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import javax.swing.JButton;
+import javax.swing.text.AttributeSet;
+import javax.swing.text.BadLocationException;
+import javax.swing.text.Document;
+import javax.swing.text.PlainDocument;
+
+/**
+ * Checks if the pin confirmation (compareTo) corresponds to this pin.
+ * Additionally, checks if currentPIN (optional) meets the requirements before enabling the OK button.
+ * @author clemens
+ */
+class ComparePinDocument extends PlainDocument {
+
+  private static final long serialVersionUID = 1L;
+  protected Pattern pinPattern;
+  protected int minLength;
+  protected int maxLength;
+  protected JButton enterButton;
+  protected Document compareTo;
+  protected Document currentPIN;
+
+  /**
+   * Constructor without compareTo Document parameter (allow null and set later to avoid cyclic dependencies)
+   */
+  public ComparePinDocument(int minLength, int maxLength, String pattern, JButton enterButton) {
+    if (enterButton == null) {
+      throw new NullPointerException("OK button null");
+    }
+    if (pattern != null) {
+      pinPattern = Pattern.compile(pattern);
+    } else {
+      pinPattern = Pattern.compile(".");
+    }
+    this.minLength = minLength;
+    this.maxLength = maxLength;
+    this.enterButton = enterButton;
+  }
+
+  /**
+   * @param compareTo should not be null (allow null and set later to avoid cyclic dependencies)
+   */
+  public ComparePinDocument(int minLength, int maxLength, String pattern,
+          JButton enterButton, Document compareTo) {
+    this(minLength, maxLength, pattern, enterButton);
+    this.compareTo = compareTo;
+  }
+  
+  public ComparePinDocument(int minLength, int maxLength, String pattern,
+          JButton enterButton, Document compareTo, Document currentPIN) {
+    this(minLength, maxLength, pattern, enterButton, compareTo);
+    this.currentPIN = currentPIN;
+  }
+
+  @Override
+  public void insertString(int offs, String str, AttributeSet a) throws BadLocationException {
+    if (maxLength < 0 || maxLength >= (getLength() + str.length())) {
+      boolean matches = true;
+      for (int i = 0; i < str.length(); i++) {
+        Matcher m = pinPattern.matcher(str.substring(i, i + 1));
+        if (!m.matches()) {
+          matches = false;
+        }
+      }
+      if (matches) {
+        super.insertString(offs, str, a);
+        enterButton.setEnabled(
+                getLength() >= minLength
+                && (currentPIN == null || currentPIN.getLength() >= minLength)
+                && compareTo.getText(0, compareTo.getLength()).equals(getText(0, getLength())));
+      }
+    }
+  }
+
+  @Override
+  public void remove(int offs, int len) throws BadLocationException {
+    super.remove(offs, len);
+    enterButton.setEnabled(
+            getLength() >= minLength
+            && (currentPIN == null || currentPIN.getLength() >= minLength)
+            && compareTo.getText(0, compareTo.getLength()).equals(getText(0, getLength())));
+  }
+}