2 * Copyright © 2016-2020 Soren Stoutner <soren@stoutner.com>.
4 * This file is part of Privacy Browser <https://www.stoutner.com/privacy-browser>.
6 * Privacy Browser is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * Privacy Browser is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with Privacy Browser. If not, see <http://www.gnu.org/licenses/>.
19 package com.stoutner.privacybrowser.dialogs
21 import android.annotation.SuppressLint
22 import android.app.AlertDialog
23 import android.app.Dialog
24 import android.content.Context
25 import android.content.DialogInterface
26 import android.graphics.Bitmap
27 import android.graphics.BitmapFactory
28 import android.os.Bundle
29 import android.text.Editable
30 import android.text.TextWatcher
31 import android.view.KeyEvent
32 import android.view.View
33 import android.view.WindowManager
34 import android.widget.EditText
35 import android.widget.ImageView
37 import androidx.fragment.app.DialogFragment
38 import androidx.preference.PreferenceManager
40 import com.stoutner.privacybrowser.R
41 import com.stoutner.privacybrowser.helpers.BookmarksDatabaseHelper
43 import java.io.ByteArrayOutputStream
45 class CreateBookmarkFolderDialog: DialogFragment() {
46 // The public interface is used to send information back to the parent activity.
47 interface CreateBookmarkFolderListener {
48 fun onCreateBookmarkFolder(dialogFragment: DialogFragment, favoriteIconBitmap: Bitmap)
51 // The create bookmark folder listener is initialized in `onAttach()` and used in `onCreateDialog()`.
52 private lateinit var createBookmarkFolderListener: CreateBookmarkFolderListener
54 override fun onAttach(context: Context) {
55 // Run the default commands.
56 super.onAttach(context)
58 // Get a handle for the create bookmark folder listener from the launching context.
59 createBookmarkFolderListener = context as CreateBookmarkFolderListener
63 // `@JvmStatic` will no longer be required once all the code has transitioned to Kotlin. Also, the function can then be moved out of a companion object and just become a package-level function.
65 fun createBookmarkFolder(favoriteIconBitmap: Bitmap): CreateBookmarkFolderDialog {
66 // Create a favorite icon byte array output stream.
67 val favoriteIconByteArrayOutputStream = ByteArrayOutputStream()
69 // Convert the favorite icon to a PNG and place it in the byte array output stream. `0` is for lossless compression (the only option for a PNG).
70 favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, favoriteIconByteArrayOutputStream)
72 // Convert the byte array output stream to a byte array.
73 val favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray()
75 // Create an arguments bundle.
76 val argumentsBundle = Bundle()
78 // Store the favorite icon in the bundle.
79 argumentsBundle.putByteArray("favorite_icon_byte_array", favoriteIconByteArray)
81 // Create a new instance of the dialog.
82 val createBookmarkFolderDialog = CreateBookmarkFolderDialog()
84 // Add the bundle to the dialog.
85 createBookmarkFolderDialog.arguments = argumentsBundle
87 // Return the new dialog.
88 return createBookmarkFolderDialog
92 // `@SuppressLing("InflateParams")` removes the warning about using `null` as the parent view group when inflating the alert dialog.
93 @SuppressLint("InflateParams")
94 override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
96 val arguments = arguments!!
98 // Get the favorite icon byte array.
99 val favoriteIconByteArray = arguments.getByteArray("favorite_icon_byte_array")!!
101 // Convert the favorite icon byte array to a bitmap.
102 val favoriteIconBitmap = BitmapFactory.decodeByteArray(favoriteIconByteArray, 0, favoriteIconByteArray.size)
104 // Get a handle for the shared preferences.
105 val sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context)
107 // Get the screenshot and theme preferences.
108 val allowScreenshots = sharedPreferences.getBoolean("allow_screenshots", false)
109 val darkTheme = sharedPreferences.getBoolean("dark_theme", false)
111 // Use an alert dialog builder to create the dialog and set the style according to the theme.
112 val dialogBuilder = if (darkTheme) {
113 AlertDialog.Builder(context, R.style.PrivacyBrowserAlertDialogDark)
115 AlertDialog.Builder(context, R.style.PrivacyBrowserAlertDialogLight)
119 dialogBuilder.setTitle(R.string.create_folder)
121 // Set the view. The parent view is null because it will be assigned by the alert dialog.
122 dialogBuilder.setView(activity!!.layoutInflater.inflate(R.layout.create_bookmark_folder_dialog, null))
124 // Set a listener on the cancel button. Using `null` as the listener closes the dialog without doing anything else.
125 dialogBuilder.setNegativeButton(R.string.cancel, null)
127 // Set a listener on the create button.
128 dialogBuilder.setPositiveButton(R.string.create) { _: DialogInterface, _: Int ->
129 // Return the dialog fragment to the parent activity on create.
130 createBookmarkFolderListener.onCreateBookmarkFolder(this, favoriteIconBitmap)
133 // Create an alert dialog from the builder.
134 val alertDialog = dialogBuilder.create()
136 // Disable screenshots if not allowed.
137 if (!allowScreenshots) {
138 alertDialog.window!!.addFlags(WindowManager.LayoutParams.FLAG_SECURE)
141 // Display the keyboard.
142 alertDialog.window!!.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE)
144 // The alert dialog must be shown before the content can be modified.
147 // Get handles for the views in the dialog.
148 val webPageIconImageView: ImageView = alertDialog.findViewById(R.id.create_folder_web_page_icon)
149 val folderNameEditText: EditText = alertDialog.findViewById(R.id.create_folder_name_edittext)
150 val createButton = alertDialog.getButton(AlertDialog.BUTTON_POSITIVE)
152 // Display the current favorite icon.
153 webPageIconImageView.setImageBitmap(favoriteIconBitmap)
155 // Initially disable the create button.
156 createButton.isEnabled = false
158 // Initialize the database helper. The `0` specifies a database version, but that is ignored and set instead using a constant in `BookmarksDatabaseHelper`.
159 val bookmarksDatabaseHelper = BookmarksDatabaseHelper(context, null, null, 0)
161 // Enable the create button if the new folder name is unique.
162 folderNameEditText.addTextChangedListener(object: TextWatcher {
163 override fun beforeTextChanged(s: CharSequence, start: Int, count: Int, after: Int) {
167 override fun onTextChanged(s: CharSequence, start: Int, before: Int, count: Int) {
171 override fun afterTextChanged(editable: Editable) {
172 // Convert the current text to a string.
173 val folderName = editable.toString()
175 // Check if a folder with the name already exists.
176 val folderExistsCursor = bookmarksDatabaseHelper.getFolder(folderName)
178 // Enable the create button if the new folder name is not empty and doesn't already exist.
179 createButton.isEnabled = folderName.isNotEmpty() && (folderExistsCursor.count == 0)
183 // Set the enter key on the keyboard to create the folder from the edit text.
184 folderNameEditText.setOnKeyListener { _: View?, keyCode: Int, keyEvent: KeyEvent ->
185 // Check the key code, event, and button status.
186 if (keyEvent.action == KeyEvent.ACTION_DOWN && keyCode == KeyEvent.KEYCODE_ENTER && createButton.isEnabled) { // The event is a key-down on the enter key and the create button is enabled.
187 // Trigger the create bookmark folder listener and return the dialog fragment to the parent activity.
188 createBookmarkFolderListener.onCreateBookmarkFolder(this, favoriteIconBitmap)
190 // Manually dismiss the alert dialog.
191 alertDialog.dismiss()
193 // Consume the event.
194 return@setOnKeyListener true
195 } else { // Some other key was pressed or the create button is disabled.
196 return@setOnKeyListener false
200 // Return the alert dialog.