Issue 2801 - Create 'Whitelisted websites' screen and add link to 'Ad blocking' screen

mobile/android/thirdparty/org/adblockplus/browser/InputValidatorDialogPreference.java

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 package org.adblockplus.browser;
 
-import java.lang.ref.WeakReference;
-
+import android.app.AlertDialog;
 import android.content.Context;
-import android.preference.Preference;
+import android.os.Bundle;
+import android.preference.EditTextPreference;
+import android.text.Editable;
+import android.text.InputType;
+import android.text.TextWatcher;
 import android.util.AttributeSet;
-
-public class UrlInputOpenerPreference extends Preference implements UrlInputDialog.UrlReadyCallback
+import android.util.Patterns;
+import android.view.KeyEvent;
+import android.view.View;
+import android.view.inputmethod.EditorInfo;
+import android.widget.EditText;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import org.apache.commons.validator.routines.DomainValidator;
+import org.mozilla.gecko.R;
+
+public class InputValidatorDialogPreference extends EditTextPreference implements TextWatcher,
+    TextView.OnEditorActionListener
 {
-  private static WeakReference<UrlInputDialog.UrlReadyCallback> redirectUrlReadyCallback = null;
-
-  public UrlInputOpenerPreference(Context context)
+
+  public enum ValidationType
+  {
+    URL, DOMAIN
+  }
+
+  private ValidationType validationType;
+  private String errorMessage;
+  private OnInputReadyListener onInputReadyListener;
+  private AlertDialog alertDialog;
+
+  public InputValidatorDialogPreference(Context context)
   {
     super(context);
-  }
-
-  public UrlInputOpenerPreference(Context context, AttributeSet attrs)
+    this.init();
+  }
+
+  public InputValidatorDialogPreference(Context context, AttributeSet attrs)
   {
     super(context, attrs);
-  }
-
-  public UrlInputOpenerPreference(Context context, AttributeSet attrs, int defStyleAttr)
+    this.init();
+  }
+
+  public InputValidatorDialogPreference(Context context, AttributeSet attrs, int defStyleAttr)
   {
     super(context, attrs, defStyleAttr);
-  }
-
-  protected static synchronized void setRedirectUrlReadyCallback(
-      final UrlInputDialog.UrlReadyCallback callback)
-  {
-    redirectUrlReadyCallback = new WeakReference<UrlInputDialog.UrlReadyCallback>(callback);
-  }
-
-  @Override
-  protected void onAttachedToActivity()
-  {
-    this.setPersistent(false);
-  }
-
-  @Override
-  protected void onClick()
-  {
-    new UrlInputDialog(this.getContext(), UrlInputDialog.Type.ADD_SUBSCRIPTION, this).show();
-  }
-
-  @Override
-  public void callback(String url)
-  {
-    try
-    {
-      if (redirectUrlReadyCallback != null)
+    this.init();
+  }
+
+  private void init()
+  {
+    // Setting defaults
+    this.setIcon(android.R.drawable.ic_menu_add);
+    this.setPositiveButtonText(android.R.string.ok);
+    this.setNegativeButtonText(android.R.string.cancel);
+    this.setValidationType(ValidationType.URL);
+    this.setErrorMessage(R.string.abb_invalid_url);
+    final EditText editText = this.getEditText();
+    editText.addTextChangedListener(this);
+    editText.setOnEditorActionListener(this);
+    editText.setInputType(InputType.TYPE_TEXT_VARIATION_URI);
+  }
+
+  @Override
+  protected void showDialog(Bundle state)
+  {
+    super.showDialog(state);
+
+    this.alertDialog = (AlertDialog) this.getDialog();
+    // Positive button is disabled until a valid input is entered
+    this.setPositiveButtonEnabled(false);
+  }
+
+  @Override
+  protected void onDialogClosed(boolean positiveResult)
+  {
+    super.onDialogClosed(positiveResult);
+
+    this.alertDialog = null;
+    if (positiveResult && this.onInputReadyListener != null)
+    {
+      this.onInputReadyListener.onInputReady(this.getInput());
+    }
+  }
+
+  @Override
+  public void beforeTextChanged(CharSequence s, int start, int count, int after)
+  {
+    // Ignored
+  }
+
+  @Override
+  public void onTextChanged(CharSequence s, int start, int before, int count)
+  {
+    // Ignored
+  }
+
+  @Override
+  public void afterTextChanged(Editable s)
+  {
+    this.setPositiveButtonEnabled(this.isValidInput());
+  }
+
+  @Override
+  public boolean onEditorAction(TextView v, int actionId, KeyEvent event)
+  {
+    if (actionId == EditorInfo.IME_ACTION_DONE)
+    {
+      if (this.isValidInput())
       {
-        final UrlInputDialog.UrlReadyCallback callback = redirectUrlReadyCallback.get();
-        if (callback != null)
-        {
-          callback.callback(url);
-        }
+        this.alertDialog.getButton(AlertDialog.BUTTON_POSITIVE).performClick();
       }
-    }
-    catch (Throwable t)
-    {
-      // we do not care
-    }
+      else
+      {
+        Toast.makeText(this.getContext(), this.errorMessage, Toast.LENGTH_SHORT).show();
+      }
+      return true;
+    }
+    return false;
+  }
+
+  @Override
+  protected void onBindView(View view)
+  {
+    super.onBindView(view);
+    final TextView title = (TextView) view.findViewById(android.R.id.title);
+    if (title != null)
+    {
+      title.setSingleLine(false);
+      title.setEllipsize(null);
+    }
+  }
+
+  public void setValidationType(ValidationType validationType)
+  {
+    this.validationType = validationType;
+  }
+
+  public void setErrorMessage(int msgResId)
+  {
+    this.setErrorMessage(this.getContext().getString(msgResId));
+  }
+
+  public void setErrorMessage(String message)
+  {
+    this.errorMessage = message;
+  }
+
+  public void setOnInputReadyListener(OnInputReadyListener listener)
+  {
+    this.onInputReadyListener = listener;
+  }
+
+  private boolean isValidInput()
+  {
+    switch (this.validationType)
+    {
+      case DOMAIN:
+        return this.isValidDomain();
+      default:
+        return this.isValidUrl();
+    }
+  }
+
+  private boolean isValidDomain()
+  {
+    return DomainValidator.getInstance().isValid(this.getInput());
+  }
+
+  private boolean isValidUrl()
+  {
+    return Patterns.WEB_URL.matcher(this.getInput()).matches();
+  }
+
+  private String getInput()
+  {
+    return this.getEditText().getText().toString();
+  }
+
+  private void setPositiveButtonEnabled(boolean enabled)
+  {
+    if (this.alertDialog != null)
+    {
+      this.alertDialog.getButton(AlertDialog.BUTTON_POSITIVE).setEnabled(enabled);
+    }
+  }
+
+  public interface OnInputReadyListener
+  {
+    void onInputReady(String input);
   }
 }