| /* |
| * 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.ChangeHandler; |
| import com.google.gwt.event.dom.client.KeyPressHandler; |
| import com.google.gwt.user.client.ui.CheckBox; |
| import com.google.gwt.user.client.ui.Grid; |
| import com.google.gwt.user.client.ui.HasText; |
| 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 |
| * @author Sean Owen |
| */ |
| public final class WifiGenerator implements GeneratorSource { |
| |
| private Grid table; |
| private final TextBox ssid = new TextBox(); |
| private final TextBox password = new TextBox(); |
| private final ListBox networkType = new ListBox(); |
| private final CheckBox hidden = new CheckBox(); |
| |
| public WifiGenerator(ChangeHandler handler, KeyPressHandler keyListener) { |
| networkType.addItem("WEP", "WEP"); |
| networkType.addItem("WPA/WPA2", "WPA"); |
| networkType.addItem("No encryption", "nopass"); |
| TextBox[] widgets = {ssid, password}; |
| for (TextBox w: widgets) { |
| w.addChangeHandler(handler); |
| w.addKeyPressHandler(keyListener); |
| } |
| } |
| |
| @Override |
| public String getName() { |
| return "Wifi network"; |
| } |
| |
| @Override |
| public String getText() throws GeneratorException { |
| String ssid = getSsidField(); |
| String password = getPasswordField(); |
| String networkType = getNetworkTypeField(); |
| boolean hidden = getHiddenField(); |
| // Build the output with obtained data. |
| return getWifiString(ssid, password, networkType, hidden); |
| } |
| |
| private static String getWifiString(String ssid, String password, String type, boolean hidden) { |
| StringBuilder output = new StringBuilder(100); |
| output.append("WIFI:"); |
| output.append("S:").append(ssid).append(';'); |
| if (type != null && !type.isEmpty() && !"nopass".equals(type)) { |
| maybeAppend(output, "T:", type); |
| } |
| maybeAppend(output, "P:", password); |
| if (hidden) { |
| maybeAppend(output, "H:", "true"); |
| } |
| output.append(';'); |
| return output.toString(); |
| } |
| |
| private static void maybeAppend(StringBuilder output, String prefix, String value) { |
| if (value != null && !value.isEmpty()) { |
| output.append(prefix).append(value).append(';'); |
| } |
| } |
| |
| private static String parseTextField(String name, HasText textBox) throws GeneratorException { |
| String input = textBox.getText(); |
| if (input.isEmpty()) { |
| return ""; |
| } |
| if (input.contains("\n")) { |
| throw new GeneratorException(name + " field must not contain \\n characters."); |
| } |
| return input.replaceAll("([\\\\:;])", "\\\\$1"); |
| } |
| |
| private String getSsidField() throws GeneratorException { |
| String input = ssid.getText(); |
| if (input.isEmpty()) { |
| throw new GeneratorException("SSID must be at least 1 character."); |
| } |
| String parsed = parseTextField("SSID", ssid); |
| return quoteHex(parsed); // Android needs hex-like SSIDs quoted or will be read as hex |
| } |
| |
| private String getPasswordField() throws GeneratorException { |
| return parseTextField("Password", password); |
| } |
| |
| private String getNetworkTypeField() { |
| return networkType.getValue(networkType.getSelectedIndex()); |
| } |
| |
| private boolean getHiddenField() { |
| Boolean value = hidden.getValue(); |
| return value != null && value; |
| } |
| |
| @Override |
| public Grid getWidget() { |
| if (table != null) { |
| // early termination if the table has already been constructed |
| return table; |
| } |
| table = new Grid(4, 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); |
| table.setText(3, 0, "Hidden?"); |
| table.setWidget(3, 1, hidden); |
| |
| ssid.addStyleName(StylesDefs.INPUT_FIELD_REQUIRED); |
| return table; |
| } |
| |
| @Override |
| public void validate(Widget widget) throws GeneratorException { |
| if (widget == ssid) { |
| getSsidField(); |
| } |
| if (widget == password) { |
| getPasswordField(); |
| } |
| if (widget == networkType) { |
| getNetworkTypeField(); |
| } |
| if (widget == hidden) { |
| getHiddenField(); |
| } |
| } |
| |
| @Override |
| public void setFocus() { |
| ssid.setFocus(true); |
| } |
| |
| private static String quoteHex(String value) { |
| if (value != null && value.matches("[0-9A-Fa-f]+")) { |
| if (value.charAt(0) == '"' && value.charAt(value.length() - 1) == '"') { |
| return value; |
| } |
| return '\"' + value + '\"'; |
| } |
| return value; |
| } |
| |
| } |