2 * Copyright © 2019-2022 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.content.Intent
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.appcompat.app.AlertDialog
37 import androidx.fragment.app.DialogFragment
38 import androidx.preference.PreferenceManager
40 import com.stoutner.privacybrowser.R
41 import com.stoutner.privacybrowser.activities.MainWebViewActivity
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 mhtExplanationTextView: TextView
53 // The public interface is used to send information back to the parent activity.
54 interface OpenListener {
55 fun onOpen(dialogFragment: DialogFragment)
58 override fun onAttach(context: Context) {
59 // Run the default commands.
60 super.onAttach(context)
62 // Get a handle for the open listener from the launching context.
63 openListener = context as OpenListener
66 override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
67 // Use an alert dialog builder to create the alert dialog.
68 val dialogBuilder = AlertDialog.Builder(requireContext(), R.style.PrivacyBrowserAlertDialog)
71 dialogBuilder.setIcon(R.drawable.proxy_enabled)
74 dialogBuilder.setTitle(R.string.open)
77 dialogBuilder.setView(R.layout.open_dialog)
79 // Set the cancel button listener. Using `null` as the listener closes the dialog without doing anything else.
80 dialogBuilder.setNegativeButton(R.string.cancel, null)
82 // Set the open button listener.
83 dialogBuilder.setPositiveButton(R.string.open) { _: DialogInterface?, _: Int ->
84 // Return the dialog fragment to the parent activity.
85 openListener.onOpen(this)
88 // Create an alert dialog from the builder.
89 val alertDialog = dialogBuilder.create()
91 // Get a handle for the shared preferences.
92 val sharedPreferences = PreferenceManager.getDefaultSharedPreferences(requireContext())
94 // Get the screenshot preference.
95 val allowScreenshots = sharedPreferences.getBoolean(getString(R.string.allow_screenshots_key), false)
97 // Disable screenshots if not allowed.
98 if (!allowScreenshots) {
99 alertDialog.window!!.addFlags(WindowManager.LayoutParams.FLAG_SECURE)
102 // The alert dialog must be shown before items in the layout can be modified.
105 // Get handles for the layout items.
106 val fileNameEditText = alertDialog.findViewById<EditText>(R.id.file_name_edittext)!!
107 val browseButton = alertDialog.findViewById<Button>(R.id.browse_button)!!
108 val mhtCheckBox = alertDialog.findViewById<CheckBox>(R.id.mht_checkbox)!!
109 mhtExplanationTextView = alertDialog.findViewById(R.id.mht_explanation_textview)!!
110 val openButton = alertDialog.getButton(AlertDialog.BUTTON_POSITIVE)
112 // Initially disable the open button.
113 openButton.isEnabled = false
115 // Update the status of the open button when the file name changes.
116 fileNameEditText.addTextChangedListener(object : TextWatcher {
117 override fun beforeTextChanged(charSequence: CharSequence, i: Int, i1: Int, i2: Int) {
121 override fun onTextChanged(charSequence: CharSequence, i: Int, i1: Int, i2: Int) {
125 override fun afterTextChanged(editable: Editable) {
126 // Get the current file name.
127 val fileNameString = fileNameEditText.text.toString()
129 // Enable the open button if the file name is populated.
130 openButton.isEnabled = fileNameString.isNotEmpty()
134 // Handle clicks on the browse button.
135 browseButton.setOnClickListener {
136 // Create the file picker intent.
137 val browseIntent = Intent(Intent.ACTION_OPEN_DOCUMENT)
139 // Only display files that can be opened.
140 browseIntent.addCategory(Intent.CATEGORY_OPENABLE)
142 // Set the intent MIME type to include all files so that everything is visible.
143 browseIntent.type = "*/*"
145 // Start the file picker. This must be started under `activity` to that the request code is returned correctly.
146 requireActivity().startActivityForResult(browseIntent, MainWebViewActivity.BROWSE_OPEN_REQUEST_CODE)
149 // Handle clicks on the MHT checkbox.
150 mhtCheckBox.setOnClickListener {
151 // Update the visibility of the MHT explanation text view.
152 if (mhtCheckBox.isChecked) {
153 mhtExplanationTextView.visibility = View.VISIBLE
155 mhtExplanationTextView.visibility = View.GONE
159 // Restore the MHT explanation text view visibility if the saved instance state is not null.
160 if (savedInstanceState != null) {
161 // Restore the MHT explanation text view visibility.
162 if (savedInstanceState.getBoolean(MHT_EXPLANATION_VISIBILITY)) {
163 mhtExplanationTextView.visibility = View.VISIBLE
165 mhtExplanationTextView.visibility = View.GONE
169 // Return the alert dialog.
173 override fun onSaveInstanceState(savedInstanceState: Bundle) {
174 // Run the default commands.
175 super.onSaveInstanceState(savedInstanceState)
177 // Add the MHT explanation visibility status to the bundle.
178 savedInstanceState.putBoolean(MHT_EXPLANATION_VISIBILITY, mhtExplanationTextView.visibility == View.VISIBLE)