--- /dev/null
+/*
+ * Copyright 2017-2023 Soren Stoutner <soren@stoutner.com>.
+ *
+ * This file is part of Privacy Browser Android <https://www.stoutner.com/privacy-browser-android>.
+ *
+ * Privacy Browser Android is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Privacy Browser Android is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Privacy Browser Android. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.stoutner.privacybrowser.activities
+
+import android.os.Bundle
+import android.text.SpannableStringBuilder
+import android.text.style.ForegroundColorSpan
+import android.util.TypedValue
+import android.view.KeyEvent
+import android.view.Menu
+import android.view.MenuItem
+import android.view.View
+import android.view.View.OnFocusChangeListener
+import android.view.WindowManager
+import android.view.inputmethod.InputMethodManager
+import android.widget.EditText
+import android.widget.ProgressBar
+import android.widget.TextView
+
+import androidx.appcompat.app.ActionBar
+import androidx.appcompat.app.AppCompatActivity
+import androidx.appcompat.widget.Toolbar
+import androidx.core.app.NavUtils
+import androidx.fragment.app.DialogFragment
+import androidx.lifecycle.ViewModelProvider
+import androidx.preference.PreferenceManager
+import androidx.swiperefreshlayout.widget.SwipeRefreshLayout
+
+import com.google.android.material.snackbar.Snackbar
+
+import com.stoutner.privacybrowser.R
+import com.stoutner.privacybrowser.dialogs.AboutViewHeadersDialog
+import com.stoutner.privacybrowser.dialogs.UntrustedSslCertificateDialog
+import com.stoutner.privacybrowser.dialogs.UntrustedSslCertificateDialog.UntrustedSslCertificateListener
+import com.stoutner.privacybrowser.helpers.ProxyHelper
+import com.stoutner.privacybrowser.helpers.UrlHelper
+import com.stoutner.privacybrowser.viewmodelfactories.ViewHeadersFactory
+import com.stoutner.privacybrowser.viewmodels.HeadersViewModel
+
+// Define the public constants.
+const val USER_AGENT = "user_agent"
+
+class ViewHeadersActivity: AppCompatActivity(), UntrustedSslCertificateListener {
+ // Declare the class variables.
+ private lateinit var headersViewModel: HeadersViewModel
+ private lateinit var initialGrayColorSpan: ForegroundColorSpan
+ private lateinit var finalGrayColorSpan: ForegroundColorSpan
+ private lateinit var redColorSpan: ForegroundColorSpan
+
+ // Declare the class views.
+ private lateinit var urlEditText: EditText
+ private lateinit var requestHeadersTitleTextView: TextView
+ private lateinit var requestHeadersTextView: TextView
+ private lateinit var responseMessageTitleTextView: TextView
+ private lateinit var responseMessageTextView: TextView
+ private lateinit var responseHeadersTitleTextView: TextView
+ private lateinit var responseBodyTitleTextView: TextView
+
+ override fun onCreate(savedInstanceState: Bundle?) {
+ // Get a handle for the shared preferences.
+ val sharedPreferences = PreferenceManager.getDefaultSharedPreferences(applicationContext)
+
+ // Get the preferences.
+ val allowScreenshots = sharedPreferences.getBoolean(getString(R.string.allow_screenshots_key), false)
+ val bottomAppBar = sharedPreferences.getBoolean(getString(R.string.bottom_app_bar_key), false)
+
+ // Disable screenshots if not allowed.
+ if (!allowScreenshots) {
+ window.addFlags(WindowManager.LayoutParams.FLAG_SECURE)
+ }
+
+ // Run the default commands.
+ super.onCreate(savedInstanceState)
+
+ // Get the launching intent
+ val intent = intent
+
+ // Get the information from the intent.
+ val currentUrl = intent.getStringExtra(CURRENT_URL)!!
+ val userAgent = intent.getStringExtra(USER_AGENT)!!
+
+ // Set the content view.
+ if (bottomAppBar) {
+ setContentView(R.layout.view_headers_bottom_appbar)
+ } else {
+ setContentView(R.layout.view_headers_top_appbar)
+ }
+
+ // Get a handle for the toolbar.
+ val toolbar = findViewById<Toolbar>(R.id.toolbar)
+
+ // Set the support action bar.
+ setSupportActionBar(toolbar)
+
+ // Get a handle for the action bar.
+ val actionBar = supportActionBar!!
+
+ // Add the custom layout to the action bar.
+ actionBar.setCustomView(R.layout.view_headers_appbar_custom_view)
+
+ // Instruct the action bar to display a custom layout.
+ actionBar.displayOptions = ActionBar.DISPLAY_SHOW_CUSTOM
+
+ // Get handles for the views.
+ urlEditText = findViewById(R.id.url_edittext)
+ val progressBar = findViewById<ProgressBar>(R.id.progress_bar)
+ val swipeRefreshLayout = findViewById<SwipeRefreshLayout>(R.id.swiperefreshlayout)
+ requestHeadersTitleTextView = findViewById(R.id.request_headers_title_textview)
+ requestHeadersTextView = findViewById(R.id.request_headers_textview)
+ responseMessageTitleTextView = findViewById(R.id.response_message_title_textview)
+ responseMessageTextView = findViewById(R.id.response_message_textview)
+ responseHeadersTitleTextView = findViewById(R.id.response_headers_title_textview)
+ val responseHeadersTextView = findViewById<TextView>(R.id.response_headers_textview)
+ responseBodyTitleTextView = findViewById(R.id.response_body_title_textview)
+ val responseBodyTextView = findViewById<TextView>(R.id.response_body_textview)
+
+ // Populate the URL text box.
+ urlEditText.setText(currentUrl)
+
+ // Initialize the gray foreground color spans for highlighting the URLs.
+ initialGrayColorSpan = ForegroundColorSpan(getColor(R.color.gray_500))
+ finalGrayColorSpan = ForegroundColorSpan(getColor(R.color.gray_500))
+ redColorSpan = ForegroundColorSpan(getColor(R.color.red_text))
+
+ // Apply text highlighting to the URL.
+ UrlHelper.highlightSyntax(urlEditText, initialGrayColorSpan, finalGrayColorSpan, redColorSpan)
+
+ // Get a handle for the input method manager, which is used to hide the keyboard.
+ val inputMethodManager = (getSystemService(INPUT_METHOD_SERVICE) as InputMethodManager)
+
+ // Remove the formatting from the URL when the user is editing the text.
+ urlEditText.onFocusChangeListener = OnFocusChangeListener { _: View?, hasFocus: Boolean ->
+ if (hasFocus) { // The user is editing the URL text box.
+ // Remove the highlighting.
+ urlEditText.text.removeSpan(redColorSpan)
+ urlEditText.text.removeSpan(initialGrayColorSpan)
+ urlEditText.text.removeSpan(finalGrayColorSpan)
+ } else { // The user has stopped editing the URL text box.
+ // Hide the soft keyboard.
+ inputMethodManager.hideSoftInputFromWindow(urlEditText.windowToken, 0)
+
+ // Move to the beginning of the string.
+ urlEditText.setSelection(0)
+
+ // Reapply the highlighting.
+ UrlHelper.highlightSyntax(urlEditText, initialGrayColorSpan, finalGrayColorSpan, redColorSpan)
+ }
+ }
+
+ // Set the refresh color scheme according to the theme.
+ swipeRefreshLayout.setColorSchemeResources(R.color.blue_text)
+
+ // Initialize a color background typed value.
+ val colorBackgroundTypedValue = TypedValue()
+
+ // Get the color background from the theme.
+ theme.resolveAttribute(android.R.attr.colorBackground, colorBackgroundTypedValue, true)
+
+ // Get the color background int from the typed value.
+ val colorBackgroundInt = colorBackgroundTypedValue.data
+
+ // Set the swipe refresh background color.
+ swipeRefreshLayout.setProgressBackgroundColorSchemeColor(colorBackgroundInt)
+
+ // Get the list of locales.
+ val localeList = resources.configuration.locales
+
+ // Initialize a string builder to extract the locales from the list.
+ val localesStringBuilder = StringBuilder()
+
+ // Initialize a `q` value, which is used by `WebView` to indicate the order of importance of the languages.
+ var q = 10
+
+ // Populate the string builder with the contents of the locales list.
+ for (i in 0 until localeList.size()) {
+ // Append a comma if there is already an item in the string builder.
+ if (i > 0) {
+ localesStringBuilder.append(",")
+ }
+
+ // Get the locale from the list.
+ val locale = localeList[i]
+
+ // Add the locale to the string. `locale` by default displays as `en_US`, but WebView uses the `en-US` format.
+ localesStringBuilder.append(locale.language)
+ localesStringBuilder.append("-")
+ localesStringBuilder.append(locale.country)
+
+ // If not the first locale, append `;q=0.x`, which drops by .1 for each removal from the main locale until q=0.1.
+ if (q < 10) {
+ localesStringBuilder.append(";q=0.")
+ localesStringBuilder.append(q)
+ }
+
+ // Decrement `q` if it is greater than 1.
+ if (q > 1) {
+ q--
+ }
+
+ // Add a second entry for the language only portion of the locale.
+ localesStringBuilder.append(",")
+ localesStringBuilder.append(locale.language)
+
+ // Append `1;q=0.x`, which drops by .1 for each removal form the main locale until q=0.1.
+ localesStringBuilder.append(";q=0.")
+ localesStringBuilder.append(q)
+
+ // Decrement `q` if it is greater than 1.
+ if (q > 1) {
+ q--
+ }
+ }
+
+ // Instantiate the proxy helper.
+ val proxyHelper = ProxyHelper()
+
+ // Get the current proxy.
+ val proxy = proxyHelper.getCurrentProxy(this)
+
+ // Make the progress bar visible.
+ progressBar.visibility = View.VISIBLE
+
+ // Set the progress bar to be indeterminate.
+ progressBar.isIndeterminate = true
+
+ // Update the layout.
+ updateLayout(currentUrl)
+
+ // Instantiate the view headers factory.
+ val viewHeadersFactory: ViewModelProvider.Factory = ViewHeadersFactory(currentUrl, userAgent, localesStringBuilder.toString(), proxy, contentResolver, MainWebViewActivity.executorService)
+
+ // Instantiate the headers view model.
+ headersViewModel = ViewModelProvider(this, viewHeadersFactory)[HeadersViewModel::class.java]
+
+ // Create a headers observer.
+ headersViewModel.observeHeaders().observe(this) { headersStringArray: Array<SpannableStringBuilder> ->
+ // Populate the text views. This can take a long time, and freezes the user interface, if the response body is particularly large.
+ requestHeadersTextView.text = headersStringArray[0]
+ responseMessageTextView.text = headersStringArray[1]
+ responseHeadersTextView.text = headersStringArray[2]
+ responseBodyTextView.text = headersStringArray[3]
+
+ // Hide the progress bar.
+ progressBar.isIndeterminate = false
+ progressBar.visibility = View.GONE
+
+ //Stop the swipe to refresh indicator if it is running
+ swipeRefreshLayout.isRefreshing = false
+ }
+
+ // Create an error observer.
+ headersViewModel.observeErrors().observe(this) { errorString: String ->
+ // Display an error snackbar if the string is not `""`.
+ if (errorString != "") {
+ if (errorString.startsWith("javax.net.ssl.SSLHandshakeException")) {
+ // Instantiate the untrusted SSL certificate dialog.
+ val untrustedSslCertificateDialog = UntrustedSslCertificateDialog()
+
+ // Show the untrusted SSL certificate dialog.
+ untrustedSslCertificateDialog.show(supportFragmentManager, getString(R.string.invalid_certificate))
+ } else {
+ // Display a snackbar with the error message.
+ Snackbar.make(swipeRefreshLayout, errorString, Snackbar.LENGTH_LONG).show()
+ }
+ }
+ }
+
+ // Implement swipe to refresh.
+ swipeRefreshLayout.setOnRefreshListener {
+ // Make the progress bar visible.
+ progressBar.visibility = View.VISIBLE
+
+ // Set the progress bar to be indeterminate.
+ progressBar.isIndeterminate = true
+
+ // Get the URL.
+ val urlString = urlEditText.text.toString()
+
+ // Update the layout.
+ updateLayout(urlString)
+
+ // Get the updated headers.
+ headersViewModel.updateHeaders(urlString, false)
+ }
+
+ // Set the go button on the keyboard to request new headers data.
+ urlEditText.setOnKeyListener { _: View?, keyCode: Int, event: KeyEvent ->
+ // Request new headers data if the enter key was pressed.
+ if (event.action == KeyEvent.ACTION_DOWN && keyCode == KeyEvent.KEYCODE_ENTER) {
+ // Hide the soft keyboard.
+ inputMethodManager.hideSoftInputFromWindow(urlEditText.windowToken, 0)
+
+ // Remove the focus from the URL box.
+ urlEditText.clearFocus()
+
+ // Make the progress bar visible.
+ progressBar.visibility = View.VISIBLE
+
+ // Set the progress bar to be indeterminate.
+ progressBar.isIndeterminate = true
+
+ // Get the URL.
+ val urlString = urlEditText.text.toString()
+
+ // Update the layout.
+ updateLayout(urlString)
+
+ // Get the updated headers.
+ headersViewModel.updateHeaders(urlString, false)
+
+ // Consume the key press.
+ return@setOnKeyListener true
+ } else {
+ // Do not consume the key press.
+ return@setOnKeyListener false
+ }
+ }
+ }
+
+ override fun onCreateOptionsMenu(menu: Menu): Boolean {
+ // Inflate the menu.
+ menuInflater.inflate(R.menu.view_headers_options_menu, menu)
+
+ // Display the menu.
+ return true
+ }
+
+ override fun onOptionsItemSelected(menuItem: MenuItem): Boolean {
+ // Instantiate the about dialog fragment.
+ val aboutDialogFragment: DialogFragment = AboutViewHeadersDialog()
+
+ // Show the about alert dialog.
+ aboutDialogFragment.show(supportFragmentManager, getString(R.string.about))
+
+ // Consume the event.
+ return true
+ }
+
+ // This method must be named `goBack()` and must have a View argument to match the default back arrow in the app bar.
+ fun goBack(@Suppress("UNUSED_PARAMETER") view: View) {
+ // Go home.
+ NavUtils.navigateUpFromSameTask(this)
+ }
+
+ override fun loadAnyway() {
+ // Load the URL anyway.
+ headersViewModel.updateHeaders(urlEditText.text.toString(), true)
+ }
+
+ private fun updateLayout(urlString: String) {
+ if (urlString.startsWith("content://")) { // This is a content URL.
+ // Hide the unused text views.
+ requestHeadersTitleTextView.visibility = View.GONE
+ requestHeadersTextView.visibility = View.GONE
+ responseMessageTitleTextView.visibility = View.GONE
+ responseMessageTextView.visibility = View.GONE
+
+ // Change the text of the remaining title text views.
+ responseHeadersTitleTextView.setText(R.string.content_metadata)
+ responseBodyTitleTextView.setText(R.string.content_data)
+ } else { // This is not a content URL.
+ // Show the views.
+ requestHeadersTitleTextView.visibility = View.VISIBLE
+ requestHeadersTextView.visibility = View.VISIBLE
+ responseMessageTitleTextView.visibility = View.VISIBLE
+ responseMessageTextView.visibility = View.VISIBLE
+
+ // Restore the text of the other title text views.
+ responseHeadersTitleTextView.setText(R.string.response_headers)
+ responseBodyTitleTextView.setText(R.string.response_body)
+ }
+ }
+}
projects / PrivacyBrowserAndroid.git / blobdiff