2 * Copyright 2019-2023 Soren Stoutner <soren@stoutner.com>.
4 * This file is part of Privacy Browser Android <https://www.stoutner.com/privacy-browser-android>.
6 * Privacy Browser Android 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 Android 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 Android. If not, see <http://www.gnu.org/licenses/>.
20 package com.stoutner.privacybrowser.dialogs
22 import android.app.Dialog
23 import android.content.Context
24 import android.content.DialogInterface
25 import android.net.Uri
26 import android.os.Bundle
27 import android.text.Editable
28 import android.text.TextWatcher
29 import android.view.View
30 import android.view.WindowManager
31 import android.widget.Button
32 import android.widget.CheckBox
33 import android.widget.EditText
34 import android.widget.TextView
36 import androidx.activity.result.contract.ActivityResultContracts
37 import androidx.appcompat.app.AlertDialog
38 import androidx.fragment.app.DialogFragment
39 import androidx.preference.PreferenceManager
41 import com.stoutner.privacybrowser.R
43 // Define the class constants.
44 private const val MHT_EXPLANATION_VISIBILITY = "mht_explanation_visibility"
46 class OpenDialog : DialogFragment() {
47 // Declare the class variables.
48 private lateinit var openListener: OpenListener
50 // Declare the class views.
51 private lateinit var fileNameEditText: EditText
52 private lateinit var mhtExplanationTextView: TextView
54 // The public interface is used to send information back to the parent activity.
55 interface OpenListener {
56 fun openFile(dialogFragment: DialogFragment)
59 override fun onAttach(context: Context) {
60 // Run the default commands.
61 super.onAttach(context)
63 // Get a handle for the open listener from the launching context.
64 openListener = context as OpenListener
67 // Define the browse activity result launcher.
68 private val browseActivityResultLauncher = registerForActivityResult(ActivityResultContracts.GetContent()) { fileUri: Uri? ->
69 // Only do something if the user didn't press back from the file picker.
70 if (fileUri != null) {
71 // Get the file name string from the URI.
72 val fileNameString = fileUri.toString()
74 // Set the file name text.
75 fileNameEditText.setText(fileNameString)
77 // Move the cursor to the end of the file name edit text.
78 fileNameEditText.setSelection(fileNameString.length)
82 override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
83 // Use an alert dialog builder to create the alert dialog.
84 val dialogBuilder = AlertDialog.Builder(requireContext(), R.style.PrivacyBrowserAlertDialog)
87 dialogBuilder.setIcon(R.drawable.proxy_enabled)
90 dialogBuilder.setTitle(R.string.open)
93 dialogBuilder.setView(R.layout.open_dialog)
95 // Set the cancel button listener. Using `null` as the listener closes the dialog without doing anything else.
96 dialogBuilder.setNegativeButton(R.string.cancel, null)
98 // Set the open button listener.
99 dialogBuilder.setPositiveButton(R.string.open) { _: DialogInterface?, _: Int ->
100 // Return the dialog fragment to the parent activity.
101 openListener.openFile(this)
104 // Create an alert dialog from the builder.
105 val alertDialog = dialogBuilder.create()
107 // Get a handle for the shared preferences.
108 val sharedPreferences = PreferenceManager.getDefaultSharedPreferences(requireContext())
110 // Get the screenshot preference.
111 val allowScreenshots = sharedPreferences.getBoolean(getString(R.string.allow_screenshots_key), false)
113 // Disable screenshots if not allowed.
114 if (!allowScreenshots) {
115 alertDialog.window!!.addFlags(WindowManager.LayoutParams.FLAG_SECURE)
118 // The alert dialog must be shown before items in the layout can be modified.
121 // Get handles for the layout items.
122 fileNameEditText = alertDialog.findViewById(R.id.file_name_edittext)!!
123 val browseButton = alertDialog.findViewById<Button>(R.id.browse_button)!!
124 val mhtCheckBox = alertDialog.findViewById<CheckBox>(R.id.mht_checkbox)!!
125 mhtExplanationTextView = alertDialog.findViewById(R.id.mht_explanation_textview)!!
126 val openButton = alertDialog.getButton(AlertDialog.BUTTON_POSITIVE)
128 // Initially disable the open button.
129 openButton.isEnabled = false
131 // Update the status of the open button when the file name changes.
132 fileNameEditText.addTextChangedListener(object : TextWatcher {
133 override fun beforeTextChanged(charSequence: CharSequence, i: Int, i1: Int, i2: Int) {
137 override fun onTextChanged(charSequence: CharSequence, i: Int, i1: Int, i2: Int) {
141 override fun afterTextChanged(editable: Editable) {
142 // Get the current file name.
143 val fileNameString = fileNameEditText.text.toString()
145 // Enable the open button if the file name is populated.
146 openButton.isEnabled = fileNameString.isNotEmpty()
150 // Handle clicks on the browse button.
151 browseButton.setOnClickListener {
152 // Launch the file picker.
153 browseActivityResultLauncher.launch("*/*")
156 // Handle clicks on the MHT checkbox.
157 mhtCheckBox.setOnClickListener {
158 // Update the visibility of the MHT explanation text view.
159 if (mhtCheckBox.isChecked) {
160 mhtExplanationTextView.visibility = View.VISIBLE
162 mhtExplanationTextView.visibility = View.GONE
166 // Restore the MHT explanation text view visibility if the saved instance state is not null.
167 if (savedInstanceState != null) {
168 // Restore the MHT explanation text view visibility.
169 if (savedInstanceState.getBoolean(MHT_EXPLANATION_VISIBILITY)) {
170 mhtExplanationTextView.visibility = View.VISIBLE
172 mhtExplanationTextView.visibility = View.GONE
176 // Return the alert dialog.
180 override fun onSaveInstanceState(savedInstanceState: Bundle) {
181 // Run the default commands.
182 super.onSaveInstanceState(savedInstanceState)
184 // Add the MHT explanation visibility status to the bundle.
185 savedInstanceState.putBoolean(MHT_EXPLANATION_VISIBILITY, mhtExplanationTextView.visibility == View.VISIBLE)