X-Git-Url: https://gitweb.stoutner.com/?a=blobdiff_plain;f=app%2Fsrc%2Fmain%2Fjava%2Fcom%2Fstoutner%2Fprivacybrowser%2Fdialogs%2FUrlHistoryDialog.java;fp=app%2Fsrc%2Fmain%2Fjava%2Fcom%2Fstoutner%2Fprivacybrowser%2Fdialogs%2FUrlHistoryDialog.java;h=4811ea2dae1853bee544ae24b55b56dc8b30b896;hb=61a76e491469916f2f30aebb47b98cda7cceb557;hp=0000000000000000000000000000000000000000;hpb=348acd7bd2c9ba9638ff87b34df4e7501214ca27;p=PrivacyBrowserAndroid.git diff --git a/app/src/main/java/com/stoutner/privacybrowser/dialogs/UrlHistoryDialog.java b/app/src/main/java/com/stoutner/privacybrowser/dialogs/UrlHistoryDialog.java new file mode 100644 index 00000000..4811ea2d --- /dev/null +++ b/app/src/main/java/com/stoutner/privacybrowser/dialogs/UrlHistoryDialog.java @@ -0,0 +1,256 @@ +/* + * Copyright 2016-2017 Soren Stoutner . + * + * This file is part of Privacy Browser . + * + * Privacy Browser is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * Privacy Browser 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 Privacy Browser. If not, see . + */ + +package com.stoutner.privacybrowser.dialogs; + +import android.annotation.SuppressLint; +import android.app.AlertDialog; +import android.app.Dialog; +import android.content.Context; +import android.content.DialogInterface; +import android.graphics.Bitmap; +import android.graphics.BitmapFactory; +import android.graphics.drawable.BitmapDrawable; +import android.graphics.drawable.Drawable; +import android.os.Bundle; +import android.support.annotation.NonNull; +import android.support.v4.content.ContextCompat; +// We have to use `AppCompatDialogFragment` instead of `DialogFragment` or an error is produced on API <= 22. `android.support.v7.app.AlertDialog` also uses more of the horizontal screen real estate versus `android.app.AlertDialog's` smaller width. +import android.support.v7.app.AppCompatDialogFragment; +import android.util.Base64; +import android.view.LayoutInflater; +import android.view.View; +import android.webkit.WebBackForwardList; +import android.widget.AdapterView; +import android.widget.ListView; + +import com.stoutner.privacybrowser.R; +import com.stoutner.privacybrowser.adapters.HistoryArrayAdapter; +import com.stoutner.privacybrowser.definitions.History; + +import java.io.ByteArrayOutputStream; +import java.util.ArrayList; + +public class UrlHistoryDialog extends AppCompatDialogFragment{ + + // `historyArrayList` and `currentPageId` pass information from `onCreate()` to `onCreateDialog()`. + private ArrayList historyArrayList = new ArrayList<>(); + private int currentPageId; + + public static UrlHistoryDialog loadBackForwardList(Context context, WebBackForwardList webBackForwardList) { + // Create `argumentsBundle`. + Bundle argumentsBundle = new Bundle(); + + // Store `currentPageIndex`. + int currentPageIndex = webBackForwardList.getCurrentIndex(); + + // Setup `urlArrayList` and `iconArrayList`. + ArrayList urlArrayList = new ArrayList<>(); + ArrayList iconBase64StringArrayList = new ArrayList<>(); + + // Get the default favorite icon `Drawable`. + Drawable defaultFavoriteIconDrawable = ContextCompat.getDrawable(context, R.drawable.world); + + // Convert `defaultFavoriteIconDrawable` to a `BitmapDrawable`. + BitmapDrawable defaultFavoriteIconBitmapDrawable = (BitmapDrawable) defaultFavoriteIconDrawable; + + // Extract a `Bitmap` from `defaultFavoriteIconBitmapDrawable`. + Bitmap defaultFavoriteIcon = defaultFavoriteIconBitmapDrawable.getBitmap(); + + // Populate `urlArrayList` and `iconArrayList` from `webBackForwardList`. + for (int i=0; i < webBackForwardList.getSize(); i++) { + // Store the URL. + urlArrayList.add(webBackForwardList.getItemAtIndex(i).getUrl()); + + // Create a variable to store the icon `Bitmap`. + Bitmap iconBitmap; + + // Store the icon `Bitmap`. + if (webBackForwardList.getItemAtIndex(i).getFavicon() == null) { + // If `webBackForwardList` does not have a favorite icon, use Privacy Browser's default world icon. + iconBitmap = defaultFavoriteIcon; + } else { // Get the icon from `webBackForwardList`. + iconBitmap = webBackForwardList.getItemAtIndex(i).getFavicon(); + } + + // Create a `ByteArrayOutputStream`. + ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream(); + + // Convert the favorite icon `Bitmap` to a `ByteArrayOutputStream`. `100` is the compression quality, which is ignored by `PNG`. + iconBitmap.compress(Bitmap.CompressFormat.PNG, 100, byteArrayOutputStream); + + // Convert the favorite icon `ByteArrayOutputStream` to a `byte[]`. + byte[] byteArray = byteArrayOutputStream.toByteArray(); + + // Encode the favorite icon `byte[]` as a Base64 `String`. + String iconBase64String = Base64.encodeToString(byteArray, Base64.DEFAULT); + + // Store the favorite icon Base64 `String` in `iconBase64StringArrayList`. + iconBase64StringArrayList.add(iconBase64String); + } + + // Store the variables in the `Bundle`. + argumentsBundle.putInt("Current_Page", currentPageIndex); + argumentsBundle.putStringArrayList("URL_History", urlArrayList); + argumentsBundle.putStringArrayList("Favorite_Icons", iconBase64StringArrayList); + + // Add `argumentsBundle` to this instance of `UrlHistoryDialog`. + UrlHistoryDialog thisUrlHistoryDialog = new UrlHistoryDialog(); + thisUrlHistoryDialog.setArguments(argumentsBundle); + return thisUrlHistoryDialog; + } + + @Override + public void onCreate(Bundle savedInstanceState) { + super.onCreate(savedInstanceState); + + // Get the `ArrayLists` from the `Arguments`. + ArrayList urlStringArrayList = getArguments().getStringArrayList("URL_History"); + ArrayList favoriteIconBase64StringArrayList = getArguments().getStringArrayList("Favorite_Icons"); + + // Remove the lint warning below that the `ArrayLists` might be `null`. + assert urlStringArrayList != null; + assert favoriteIconBase64StringArrayList != null; + + // Populate `historyArrayList`. We go down from `urlStringArrayList.size()` so that the newest entries are at the top. `-1` is needed because `historyArrayList` is zero-based. + for (int i=urlStringArrayList.size() -1; i >= 0; i--) { + // Decode the favorite icon Base64 `String` to a `byte[]`. + byte[] favoriteIconByteArray = Base64.decode(favoriteIconBase64StringArrayList.get(i), Base64.DEFAULT); + + // Convert the favorite icon `byte[]` to a `Bitmap`. `0` is the starting offset. + Bitmap favoriteIconBitmap = BitmapFactory.decodeByteArray(favoriteIconByteArray, 0, favoriteIconByteArray.length); + + // Store the favorite icon and the URL in `historyEntry`. + History historyEntry = new History(favoriteIconBitmap, urlStringArrayList.get(i)); + + // Add this history entry to `historyArrayList`. + historyArrayList.add(historyEntry); + } + + // Get the original current page ID. + int originalCurrentPageId = getArguments().getInt("Current_Page"); + + // Subtract `originalCurrentPageId` from the array size because we reversed the order of the array so that the newest entries are at the top. `-1` is needed because the array is zero-based. + currentPageId = urlStringArrayList.size() - 1 - originalCurrentPageId; + } + + // The public interface is used to send information back to the parent activity. + public interface UrlHistoryListener { + // Send back the number of steps to move forward or back. + void onUrlHistoryEntrySelected(int moveBackOrForwardSteps); + + // Clear the history. + void onClearHistory(); + } + + // `urlHistoryListener` is used in `onAttach()` and `onCreateDialog()`. + private UrlHistoryListener urlHistoryListener; + + @Override + public void onAttach(Context context) { + super.onAttach(context); + + // Check to make sure tha the parent activity implements the listener. + try { + urlHistoryListener = (UrlHistoryListener) context; + } catch (ClassCastException exception) { + throw new ClassCastException(context.toString() + " must implement UrlHistoryListener."); + } + } + + @Override + @NonNull + // `@SuppressLing("InflateParams")` removes the warning about using `null` as the parent view group when inflating the `AlertDialog`. + @SuppressLint("InflateParams") + public Dialog onCreateDialog(Bundle savedInstanceState) { + // Get the activity's layout inflater. + LayoutInflater layoutInflater = getActivity().getLayoutInflater(); + + // Use `AlertDialog.Builder` to create the `AlertDialog`. `R.style.lightAlertDialog` formats the color of the button text. + AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(getActivity(), R.style.LightAlertDialog); + + // Set the title. + dialogBuilder.setTitle(R.string.history); + + // Set the view. The parent view is `null` because it will be assigned by `AlertDialog`. + dialogBuilder.setView(layoutInflater.inflate(R.layout.url_history_dialog, null)); + + // Set an `onClick()` listener on the negative button. + dialogBuilder.setNegativeButton(R.string.clear_history, new DialogInterface.OnClickListener() { + @Override + public void onClick(DialogInterface dialog, int which) { + // Clear the history. + urlHistoryListener.onClearHistory(); + } + }); + + // Set an `onClick()` listener on the positive button. + dialogBuilder.setPositiveButton(R.string.close, new DialogInterface.OnClickListener() { + @Override + public void onClick(DialogInterface dialog, int which) { + // Do nothing if `Close` is clicked. The `Dialog` will automatically close. + } + }); + + // Create an `AlertDialog` from the `AlertDialog.Builder`. + final AlertDialog alertDialog = dialogBuilder.create(); + + // We need to show `alertDialog` before we can modify the contents. + alertDialog.show(); + + // Instantiate a `HistoryArrayAdapter`. + final HistoryArrayAdapter historyArrayAdapter = new HistoryArrayAdapter(getContext(), historyArrayList, currentPageId); + + // Get a handle for `listView`. + ListView listView = (ListView) alertDialog.findViewById(R.id.history_listview); + + // Remove the warning below that `listView` might be `null`. + assert listView != null; + + // Set the adapter on `listView`. + listView.setAdapter(historyArrayAdapter); + + // Listen for clicks on entries in `listView`. + listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { + @Override + public void onItemClick(AdapterView parent, View view, int position, long id) { + // Convert the `long` `id` to an `int`. + int itemId = (int) id; + + // Only enable the click if it is not on the `currentPageId`. + if (itemId != currentPageId) { + // Get the history entry for this `itemId`. + History historyEntry = historyArrayAdapter.getItem(itemId); + + // Remove the lint warning below that `historyEntry` might be `null`. + assert historyEntry != null; + + // Send the history entry URL to be loaded in `mainWebView`. + urlHistoryListener.onUrlHistoryEntrySelected(currentPageId - itemId); + + // Dismiss the `Dialog`. + alertDialog.dismiss(); + } + } + }); + + // `onCreateDialog` requires the return of an `AlertDialog`. + return alertDialog; + } +} \ No newline at end of file