Issue 4769 - Supporting adding whitelisted websites on ABP for Samsung Internet

src/org/adblockplus/sbrowser/contentblocker/WhitelistedWebsitesPreferenceCategory.java

Index: src/org/adblockplus/sbrowser/contentblocker/WhitelistedWebsitesPreferenceCategory.java
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new file mode 100644
--- /dev/null
+++ b/src/org/adblockplus/sbrowser/contentblocker/WhitelistedWebsitesPreferenceCategory.java
@@ -0,0 +1,194 @@
+/*
+ * This file is part of Adblock Plus <https://adblockplus.org/>,
+ * Copyright (C) 2006-2016 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.sbrowser.contentblocker;
+
+import android.app.AlertDialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.SharedPreferences;
+import android.preference.DialogPreference;
+import android.preference.PreferenceCategory;
+import android.preference.PreferenceManager;
+import android.text.Html;
+import android.util.AttributeSet;
+import android.view.View;
+
+import org.adblockplus.adblockplussbrowser.R;
+import org.adblockplus.sbrowser.contentblocker.engine.Engine;
+import org.adblockplus.sbrowser.contentblocker.engine.EngineService;
+
+import java.util.Collections;
+import java.util.Set;
+import java.util.TreeSet;
+
+public class WhitelistedWebsitesPreferenceCategory extends PreferenceCategory
+{
+  private final Set<String> whitelistedWebsites = new TreeSet<String>();
+  private Engine engine;
+
+  public WhitelistedWebsitesPreferenceCategory(Context context, AttributeSet attrs)
+  {
+    super(context, attrs);
+    // This is required to remove the title TextView of the PreferenceCategory
+    this.setLayoutResource(R.layout.empty_view);
+  }
+
+  @Override
+  protected void onAttachedToActivity()
+  {
+    super.onAttachedToActivity();
+    EngineService.startService(this.getContext().getApplicationContext(),
+        new EngineService.OnEngineCreatedCallback()
+        {
+          @Override
+          public void onEngineCreated(Engine engine, boolean success)
+          {
+            if (!success)
+            {
+              return;
+            }
+            WhitelistedWebsitesPreferenceCategory.this.engine = engine;
+            WhitelistedWebsitesPreferenceCategory.this.initEntries();
+          }
+        });
+  }
+
+  private void initEntries()
+  {
+    final SharedPreferences prefs =
+        PreferenceManager.getDefaultSharedPreferences(this.getContext().getApplicationContext());
+    final String key = this.getContext().getString(R.string.key_whitelisted_websites);
+    this.whitelistedWebsites.clear();
+    this.whitelistedWebsites.addAll(prefs.getStringSet(key, Collections.<String>emptySet()));
+    this.refreshEntries();
+  }
+
+  private void refreshEntries()
+  {
+    this.removeAll();
+    for (final String url : this.whitelistedWebsites)
+    {
+      final WhitelistedWebsitePreference whitelistedWebsitePreference =
+          new WhitelistedWebsitePreference(this.getContext(), url, new DialogInterface.OnClickListener()
+          {
+            @Override
+            public void onClick(DialogInterface dialog, int which)
+            {
+              removeWhitelistedWebsite(url);
+            }
+          });
+      this.addPreference(whitelistedWebsitePreference);
+    }
+
+    final UrlInputOpenerPreference urlPreference = new UrlInputOpenerPreference(this.getContext());
+    urlPreference.setTitle(R.string.whitelisted_websites_add_button);
+    urlPreference.setDialogTitle(R.string.whitelist_website_dialog_title);
+    urlPreference.setDialogMessage(R.string.whitelist_website_dialog_message);
+    urlPreference.getEditText().setHint(R.string.whitelist_website_dialog_hint);
+    urlPreference.setOnUrlReadyListener(new UrlInputOpenerPreference.OnUrlReadyListener()
+    {
+      @Override
+      public void onUrlReady(String url)
+      {
+        WhitelistedWebsitesPreferenceCategory.this.whitelistWebsite(url);
+      }
+    });
+    this.addPreference(urlPreference);
+  }
+
+  private void whitelistWebsite(String url)
+  {
+    this.whitelistedWebsites.add(url);
+    final SharedPreferences prefs =
+        PreferenceManager.getDefaultSharedPreferences(this.getContext().getApplicationContext());
+    final String key = this.getContext().getString(R.string.key_whitelisted_websites);
+    prefs.edit().putStringSet(key, this.whitelistedWebsites).apply();
+    this.refreshEntries();
+    this.engine.requestUpdateBroadcast();
+  }
+
+  private void removeWhitelistedWebsite(String url)
+  {
+    this.whitelistedWebsites.remove(url);
+    final SharedPreferences prefs =
+        PreferenceManager.getDefaultSharedPreferences(this.getContext().getApplicationContext());
+    final String key = this.getContext().getString(R.string.key_whitelisted_websites);
+    prefs.edit().putStringSet(key, this.whitelistedWebsites).apply();
+    this.refreshEntries();
+    this.engine.requestUpdateBroadcast();
+  }
+
+  private static class WhitelistedWebsitePreference extends DialogPreference
+  {
+    private final DialogInterface.OnClickListener onDeleteClickListener;
+
+    WhitelistedWebsitePreference(Context context, String url,
+        DialogInterface.OnClickListener onDeleteClickListener)
+    {
+      super(context);
+      this.onDeleteClickListener = onDeleteClickListener;
+      final String message = context.getString(R.string.whitelist_remove_dialog_message, url);
+      setWidgetLayoutResource(R.layout.whitelisted_website_delete_widget);
+      setTitle(url);
+      setDialogTitle(R.string.whitelist_remove_dialog_title);
+      setDialogMessage(Html.fromHtml(message));
+      setNegativeButtonText(android.R.string.cancel);
+    }
+
+    @Override
+    protected void onBindView(View view)
+    {
+      super.onBindView(view);
+      final View deleteButton = view.findViewById(R.id.whitelisted_website_delete_button);
+      deleteButton.setOnClickListener(new View.OnClickListener()
+      {
+        @Override
+        public void onClick(View v)
+        {
+          if (getDialog() == null || !getDialog().isShowing())
+          {
+            showDialog(null);
+          }
+        }
+      });
+    }
+
+    @Override
+    protected void onClick()
+    {
+      // Overriding the default behaviour of showing a dialog here
+      // We just want to show a dialog when the delete button is clicked
+    }
+
+    @Override
+    protected void onPrepareDialogBuilder(AlertDialog.Builder builder)
+    {
+      builder.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener()
+      {
+        @Override
+        public void onClick(DialogInterface dialog, int which)
+        {
+          if (WhitelistedWebsitePreference.this.onDeleteClickListener != null)
+          {
+            WhitelistedWebsitePreference.this.onDeleteClickListener.onClick(dialog, which);
+          }
+        }
+      });
+    }
+  }
+}