2 * Copyright © 2019-2021 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/>.
20 package com.stoutner.privacybrowser.dialogs
22 import android.annotation.SuppressLint
23 import android.app.Dialog
24 import android.content.Context
25 import android.content.DialogInterface
26 import android.content.Intent
27 import android.os.Bundle
28 import android.text.Editable
29 import android.text.TextWatcher
30 import android.view.View
31 import android.view.WindowManager
32 import android.widget.Button
33 import android.widget.CheckBox
34 import android.widget.EditText
35 import android.widget.TextView
37 import androidx.appcompat.app.AlertDialog
38 import androidx.fragment.app.DialogFragment
39 import androidx.preference.PreferenceManager
41 import com.stoutner.privacybrowser.R
42 import com.stoutner.privacybrowser.activities.MainWebViewActivity
44 // Define the class constants.
45 private const val MHT_EXPLANATION_VISIBILITY = "mht_explanation_visibility"
47 class OpenDialog : DialogFragment() {
48 // Declare the class variables.
49 private lateinit var openListener: OpenListener
51 // Declare the class views.
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 onOpen(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 // `@SuppressLint("InflateParams")` removes the warning about using null as the parent view group when inflating the alert dialog.
68 @SuppressLint("InflateParams")
69 override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
70 // Use an alert dialog builder to create the alert dialog.
71 val dialogBuilder = AlertDialog.Builder(requireContext(), R.style.PrivacyBrowserAlertDialog)
73 // Set the icon according to the theme.
74 dialogBuilder.setIconAttribute(R.attr.proxyBlueIcon)
77 dialogBuilder.setTitle(R.string.open)
79 // Set the view. The parent view is null because it will be assigned by the alert dialog.
80 dialogBuilder.setView(layoutInflater.inflate(R.layout.open_dialog, null))
82 // Set the cancel button listener. Using `null` as the listener closes the dialog without doing anything else.
83 dialogBuilder.setNegativeButton(R.string.cancel, null)
85 // Set the open button listener.
86 dialogBuilder.setPositiveButton(R.string.open) { _: DialogInterface?, _: Int ->
87 // Return the dialog fragment to the parent activity.
88 openListener.onOpen(this)
91 // Create an alert dialog from the builder.
92 val alertDialog = dialogBuilder.create()
94 // Get a handle for the shared preferences.
95 val sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context)
97 // Get the screenshot preference.
98 val allowScreenshots = sharedPreferences.getBoolean(getString(R.string.allow_screenshots_key), false)
100 // Disable screenshots if not allowed.
101 if (!allowScreenshots) {
102 alertDialog.window!!.addFlags(WindowManager.LayoutParams.FLAG_SECURE)
105 // The alert dialog must be shown before items in the layout can be modified.
108 // Get handles for the layout items.
109 val fileNameEditText = alertDialog.findViewById<EditText>(R.id.file_name_edittext)!!
110 val browseButton = alertDialog.findViewById<Button>(R.id.browse_button)!!
111 val mhtCheckBox = alertDialog.findViewById<CheckBox>(R.id.mht_checkbox)!!
112 mhtExplanationTextView = alertDialog.findViewById(R.id.mht_explanation_textview)!!
113 val openButton = alertDialog.getButton(AlertDialog.BUTTON_POSITIVE)
115 // Initially disable the open button.
116 openButton.isEnabled = false
118 // Update the status of the open button when the file name changes.
119 fileNameEditText.addTextChangedListener(object : TextWatcher {
120 override fun beforeTextChanged(charSequence: CharSequence, i: Int, i1: Int, i2: Int) {
124 override fun onTextChanged(charSequence: CharSequence, i: Int, i1: Int, i2: Int) {
128 override fun afterTextChanged(editable: Editable) {
129 // Get the current file name.
130 val fileNameString = fileNameEditText.text.toString()
132 // Enable the open button if the file name is populated.
133 openButton.isEnabled = fileNameString.isNotEmpty()
137 // Handle clicks on the browse button.
138 browseButton.setOnClickListener {
139 // Create the file picker intent.
140 val browseIntent = Intent(Intent.ACTION_OPEN_DOCUMENT)
142 // Only display files that can be opened.
143 browseIntent.addCategory(Intent.CATEGORY_OPENABLE)
145 // Set the intent MIME type to include all files so that everything is visible.
146 browseIntent.type = "*/*"
148 // Start the file picker. This must be started under `activity` to that the request code is returned correctly.
149 requireActivity().startActivityForResult(browseIntent, MainWebViewActivity.BROWSE_OPEN_REQUEST_CODE)
152 // Handle clicks on the MHT checkbox.
153 mhtCheckBox.setOnClickListener {
154 // Update the visibility of the MHT explanation text view.
155 if (mhtCheckBox.isChecked) {
156 mhtExplanationTextView.visibility = View.VISIBLE
158 mhtExplanationTextView.visibility = View.GONE
162 // Restore the MHT explanation text view visibility if the saved instance state is not null.
163 if (savedInstanceState != null) {
164 // Restore the MHT explanation text view visibility.
165 if (savedInstanceState.getBoolean(MHT_EXPLANATION_VISIBILITY)) {
166 mhtExplanationTextView.visibility = View.VISIBLE
168 mhtExplanationTextView.visibility = View.GONE
172 // Return the alert dialog.
176 override fun onSaveInstanceState(savedInstanceState: Bundle) {
177 // Run the default commands.
178 super.onSaveInstanceState(savedInstanceState)
180 // Add the MHT explanation visibility status to the bundle.
181 savedInstanceState.putBoolean(MHT_EXPLANATION_VISIBILITY, mhtExplanationTextView.visibility == View.VISIBLE)