Initial checkin of wifi generator.

TODO:
1. Semicolons need to be escaped
2. In the android code, need much better error checking.  Incorrect barcodes crash Barcode Scanner!
3. Add network type NOPASS to the android code.  This is ready, and will be a separate checkin.

git-svn-id: http://zxing.googlecode.com/svn/trunk@1439 59b500cc-1b3d-0410-9834-0bbf25fbcc57

diff --git a/zxing.appspot.com/generator/src/com/google/zxing/web/generator/client/Generator.java b/zxing.appspot.com/generator/src/com/google/zxing/web/generator/client/Generator.java
index d5b7036..9f6bb33 100644 (file)
--- a/zxing.appspot.com/generator/src/com/google/zxing/web/generator/client/Generator.java
+++ b/zxing.appspot.com/generator/src/com/google/zxing/web/generator/client/Generator.java
@@ -113,6 +113,7 @@ public class Generator implements EntryPoint {
     generators.add(new SmsAddressGenerator(changeListener, keyPressHandler));
     generators.add(new TextGenerator(changeListener));
     generators.add(new UrlGenerator(changeListener, keyPressHandler));
+    generators.add(new WifiGenerator(changeListener, keyPressHandler));
   }
   
   public void setupLeftPanel() {

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);
+  }
+}