Initial checkin of wifi generator.

[zxing.git] / zxing.appspot.com / generator / src / com / google / zxing / web / generator / client / WifiGenerator.java

diff --git a/zxing.appspot.com/generator/src/com/google/zxing/web/generator/client/WifiGenerator.java b/zxing.appspot.com/generator/src/com/google/zxing/web/generator/client/WifiGenerator.java
new file mode 100644 (file)
index 0000000..3702448
--- /dev/null
+++ b/zxing.appspot.com/generator/src/com/google/zxing/web/generator/client/WifiGenerator.java
@@ -0,0 +1,142 @@
+/*
+ * Copyright (C) 2010 ZXing authors
+ *
+ * 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 com.google.zxing.web.generator.client;
+
+import com.google.gwt.event.dom.client.KeyPressHandler;
+import com.google.gwt.user.client.ui.ChangeListener;
+import com.google.gwt.user.client.ui.Grid;
+import com.google.gwt.user.client.ui.TextBox;
+import com.google.gwt.user.client.ui.ListBox;
+import com.google.gwt.user.client.ui.Widget;
+
+/**
+ * A Generator for Wifi networks.
+ * 
+ * @author Vikram Aggarwal
+ */
+public class WifiGenerator implements GeneratorSource {
+  Grid table = null;
+  TextBox ssid = new TextBox();
+  TextBox password = new TextBox();
+  // Do not allow multiple selections, thus the false
+  ListBox networkType = new ListBox(false);
+  TextBox[] widgets = {ssid, password };
+  
+  public WifiGenerator(ChangeListener changeListener,
+      KeyPressHandler keyListener) {
+       networkType.addItem("WEP", "WEP");
+       networkType.addItem("WPA/WPA2", "WPA");
+       networkType.addItem("No encryption", "nopass");
+       
+    for (TextBox w: widgets) {
+      w.addChangeListener(changeListener);
+      w.addKeyPressHandler(keyListener);
+    }
+  }
+  
+  public String getName() {
+    return "Wifi network";
+  }
+
+  public String getText() throws GeneratorException {
+    String ssid = getSsidField();
+    String password = getPasswordField();
+    String networkType = getNetworkTypeField();
+    
+    // Build the output with obtained data.
+    // note that some informations may just be "" if they were not specified.
+    //return getVCard(name, company, tel, url, email, address, memo);
+    return getWifiString(ssid, password, networkType);
+  }
+
+  private String getWifiString(String ssid, String password, String type) {
+    StringBuilder output = new StringBuilder();
+    output.append("WIFI:");
+    // TODO(vikrama): Escape the semicolons in ssid and password
+    output.append("S:").append(ssid).append(';');
+    maybeAppend(output, "T:", type);
+    maybeAppend(output, "P:", password);
+    output.append(';');
+    return output.toString();
+  }
+
+  private static void maybeAppend(StringBuilder output, String prefix, String value) {
+    if (value.length() > 0) {
+      output.append(prefix).append(value).append(';');
+    }
+  }
+
+  private static String parseTextField(String name, TextBox textBox) throws GeneratorException {
+    String input = textBox.getText();
+    if (input.length() < 1) {
+      return "";
+    }
+    if (input.contains("\n")) {
+      throw new GeneratorException(name + " field must not contain \\n characters.");
+    }
+    if (input.contains(";")) {
+       // TODO(viki): Escape semicolons and colons
+      throw new GeneratorException(name + " field must not contains ; characters");
+    }
+    return input;
+  }
+  
+  private String getSsidField() throws GeneratorException {
+    String input = ssid.getText();
+    if (input.length() < 1) {
+      throw new GeneratorException("SSID must be at least 1 character.");
+    }
+    return parseTextField("SSID", ssid);
+  }
+  
+  private String getPasswordField() throws GeneratorException {
+       return parseTextField("Password", password);
+  }
+  
+  private String getNetworkTypeField() throws GeneratorException {
+       String input = networkType.getValue(networkType.getSelectedIndex());
+       return input;
+  }
+  
+  public Grid getWidget() {
+    if (table != null) {
+      // early termination if the table has already been constructed
+      return table;
+    }
+    table = new Grid(8, 2);
+    
+    table.setText(0, 0, "SSID");
+    table.setWidget(0, 1, ssid);
+    table.setText(1, 0, "Password");
+    table.setWidget(1, 1, password);
+    table.setText(2, 0, "Network Type");
+    table.setWidget(2, 1, networkType);
+
+    ssid.addStyleName(StylesDefs.INPUT_FIELD_REQUIRED);
+    return table;
+  }
+
+  public void validate(Widget widget) throws GeneratorException {
+    if (widget == ssid) getSsidField();
+    if (widget == password) getPasswordField();
+    if (widget == networkType) getNetworkTypeField();
+  }
+
+  public void setFocus() {
+    ssid.setFocus(true);
+  }
+}