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.content.res.Configuration
28 import android.os.Bundle
29 import android.text.Editable
30 import android.text.TextWatcher
31 import android.view.View
32 import android.view.WindowManager
33 import android.widget.Button
34 import android.widget.CheckBox
35 import android.widget.EditText
36 import android.widget.TextView
38 import androidx.appcompat.app.AlertDialog
39 import androidx.fragment.app.DialogFragment
40 import androidx.preference.PreferenceManager
42 import com.stoutner.privacybrowser.R
43 import com.stoutner.privacybrowser.activities.MainWebViewActivity
45 // Define the class constants.
46 private const val MHT_EXPLANATION_VISIBILITY = "mht_explanation_visibility"
48 class OpenDialog : DialogFragment() {
49 // Declare the class variables.
50 private lateinit var openListener: OpenListener
52 // Declare the class views.
53 private lateinit var mhtExplanationTextView: TextView
55 // The public interface is used to send information back to the parent activity.
56 interface OpenListener {
57 fun onOpen(dialogFragment: DialogFragment)
60 override fun onAttach(context: Context) {
61 // Run the default commands.
62 super.onAttach(context)
64 // Get a handle for the open listener from the launching context.
65 openListener = context as OpenListener
68 // `@SuppressLint("InflateParams")` removes the warning about using null as the parent view group when inflating the alert dialog.
69 @SuppressLint("InflateParams")
70 override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
71 // Use an alert dialog builder to create the alert dialog.
72 val dialogBuilder = AlertDialog.Builder(requireContext(), R.style.PrivacyBrowserAlertDialog)
74 // Get the current theme status.
75 val currentThemeStatus = resources.configuration.uiMode and Configuration.UI_MODE_NIGHT_MASK
77 // Set the icon according to the theme.
78 dialogBuilder.setIconAttribute(R.attr.proxyBlueIcon)
81 dialogBuilder.setTitle(R.string.open)
83 // Set the view. The parent view is null because it will be assigned by the alert dialog.
84 dialogBuilder.setView(layoutInflater.inflate(R.layout.open_dialog, null))
86 // Set the cancel button listener. Using `null` as the listener closes the dialog without doing anything else.
87 dialogBuilder.setNegativeButton(R.string.cancel, null)
89 // Set the open button listener.
90 dialogBuilder.setPositiveButton(R.string.open) { _: DialogInterface?, _: Int ->
91 // Return the dialog fragment to the parent activity.
92 openListener.onOpen(this)
95 // Create an alert dialog from the builder.
96 val alertDialog = dialogBuilder.create()
98 // Get a handle for the shared preferences.
99 val sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context)
101 // Get the screenshot preference.
102 val allowScreenshots = sharedPreferences.getBoolean(getString(R.string.allow_screenshots_key), false)
104 // Disable screenshots if not allowed.
105 if (!allowScreenshots) {
106 alertDialog.window!!.addFlags(WindowManager.LayoutParams.FLAG_SECURE)
109 // The alert dialog must be shown before items in the layout can be modified.
112 // Get handles for the layout items.
113 val fileNameEditText = alertDialog.findViewById<EditText>(R.id.file_name_edittext)!!
114 val browseButton = alertDialog.findViewById<Button>(R.id.browse_button)!!
115 val mhtCheckBox = alertDialog.findViewById<CheckBox>(R.id.mht_checkbox)!!
116 mhtExplanationTextView = alertDialog.findViewById(R.id.mht_explanation_textview)!!
117 val openButton = alertDialog.getButton(AlertDialog.BUTTON_POSITIVE)
119 // Initially disable the open button.
120 openButton.isEnabled = false
122 // Update the status of the open button when the file name changes.
123 fileNameEditText.addTextChangedListener(object : TextWatcher {
124 override fun beforeTextChanged(charSequence: CharSequence, i: Int, i1: Int, i2: Int) {
128 override fun onTextChanged(charSequence: CharSequence, i: Int, i1: Int, i2: Int) {
132 override fun afterTextChanged(editable: Editable) {
133 // Get the current file name.
134 val fileNameString = fileNameEditText.text.toString()
136 // Enable the open button if the file name is populated.
137 openButton.isEnabled = fileNameString.isNotEmpty()
141 // Handle clicks on the browse button.
142 browseButton.setOnClickListener {
143 // Create the file picker intent.
144 val browseIntent = Intent(Intent.ACTION_OPEN_DOCUMENT)
146 // Only display files that can be opened.
147 browseIntent.addCategory(Intent.CATEGORY_OPENABLE)
149 // Set the intent MIME type to include all files so that everything is visible.
150 browseIntent.type = "*/*"
152 // Start the file picker. This must be started under `activity` to that the request code is returned correctly.
153 requireActivity().startActivityForResult(browseIntent, MainWebViewActivity.BROWSE_OPEN_REQUEST_CODE)
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)