+++ /dev/null
-/*
- * Copyright © 2019-2022 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.adapters;
-
-import android.os.Bundle;
-import android.os.Handler;
-import android.widget.FrameLayout;
-
-import androidx.annotation.NonNull;
-import androidx.fragment.app.Fragment;
-import androidx.fragment.app.FragmentManager;
-import androidx.fragment.app.FragmentPagerAdapter;
-import androidx.viewpager.widget.ViewPager;
-
-import com.stoutner.privacybrowser.R;
-import com.stoutner.privacybrowser.fragments.WebViewTabFragment;
-import com.stoutner.privacybrowser.views.NestedScrollWebView;
-
-import java.util.LinkedList;
-
-public class WebViewPagerAdapter extends FragmentPagerAdapter {
- // The WebView fragments list contains all the WebViews.
- private final LinkedList<WebViewTabFragment> webViewFragmentsList = new LinkedList<>();
-
- // Define the constructor.
- public WebViewPagerAdapter(FragmentManager fragmentManager) {
- // Run the default commands.
- super(fragmentManager, BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT);
- }
-
- @Override
- public int getCount() {
- // Return the number of pages.
- return webViewFragmentsList.size();
- }
-
- @Override
- public int getItemPosition(@NonNull Object object) {
- //noinspection SuspiciousMethodCalls
- if (webViewFragmentsList.contains(object)) {
- // Return the current page position.
- //noinspection SuspiciousMethodCalls
- return webViewFragmentsList.indexOf(object);
- } else {
- // The tab has been deleted.
- return POSITION_NONE;
- }
- }
-
- @Override
- @NonNull
- public Fragment getItem(int pageNumber) {
- // Get the fragment for a particular page. Page numbers are 0 indexed.
- return webViewFragmentsList.get(pageNumber);
- }
-
- @Override
- public long getItemId(int position) {
- // Return the unique ID for this page.
- return webViewFragmentsList.get(position).fragmentId;
- }
-
- public int getPositionForId(long fragmentId) {
- // Initialize the position variable.
- int position = -1;
-
- // Initialize the while counter.
- int i = 0;
-
- // Find the current position of the WebView fragment with the given ID.
- while (position < 0 && i < webViewFragmentsList.size()) {
- // Check to see if the tab ID of this WebView matches the page ID.
- if (webViewFragmentsList.get(i).fragmentId == fragmentId) {
- // Store the position if they are a match.
- position = i;
- }
-
- // Increment the counter.
- i++;
- }
-
- // Set the position to be the last tab if it is not found.
- // Sometimes there is a race condition in populating the webView fragments list when resuming Privacy Browser and displaying an SSL certificate error while loading a new intent.
- // In that case, the last tab should be the one it is looking for.
- if (position == -1) {
- position = webViewFragmentsList.size() - 1;
- }
-
- // Return the position.
- return position;
- }
-
- public void addPage(int pageNumber, ViewPager webViewPager, String url, boolean moveToNewPage) {
- // Add a new page.
- webViewFragmentsList.add(WebViewTabFragment.createPage(pageNumber, url));
-
- // Update the view pager.
- notifyDataSetChanged();
-
- // Move to the new page if indicated.
- if (moveToNewPage) {
- moveToNewPage(pageNumber, webViewPager);
- }
- }
-
- public void restorePage(Bundle savedState, Bundle savedNestedScrollWebViewState) {
- // Restore the page.
- webViewFragmentsList.add(WebViewTabFragment.restorePage(savedState, savedNestedScrollWebViewState));
-
- // Update the view pager.
- notifyDataSetChanged();
- }
-
- public boolean deletePage(int pageNumber, ViewPager webViewPager) {
- // Get the WebView tab fragment.
- WebViewTabFragment webViewTabFragment = webViewFragmentsList.get(pageNumber);
-
- // Get the WebView frame layout.
- FrameLayout webViewFrameLayout = (FrameLayout) webViewTabFragment.getView();
-
- // Remove the warning below that the WebView frame layout might be null.
- assert webViewFrameLayout != null;
-
- // Get a handle for the nested scroll WebView.
- NestedScrollWebView nestedScrollWebView = webViewFrameLayout.findViewById(R.id.nestedscroll_webview);
-
- // Pause the current WebView.
- nestedScrollWebView.onPause();
-
- // Remove all the views from the frame layout.
- webViewFrameLayout.removeAllViews();
-
- // Destroy the current WebView.
- nestedScrollWebView.destroy();
-
- // Delete the page.
- webViewFragmentsList.remove(pageNumber);
-
- // Update the view pager.
- notifyDataSetChanged();
-
- // Return true if the selected page number did not change after the delete (because the newly selected tab has has same number as the previously deleted tab).
- // This will cause the calling method to reset the current WebView to the new contents of this page number.
- return (webViewPager.getCurrentItem() == pageNumber);
- }
-
- public WebViewTabFragment getPageFragment(int pageNumber) {
- // Return the page fragment.
- return webViewFragmentsList.get(pageNumber);
- }
-
- private void moveToNewPage(int pageNumber, ViewPager webViewPager) {
- // Check to see if the new page has been populated.
- if (webViewPager.getChildCount() >= pageNumber) { // The new page is ready.
- // Move to the new page.
- webViewPager.setCurrentItem(pageNumber);
- } else { // The new page is not yet ready.
- // Create a handler.
- Handler moveToNewPageHandler = new Handler();
-
- // Create a runnable.
- Runnable moveToNewPageRunnable = () -> {
- // Move to the new page.
- webViewPager.setCurrentItem(pageNumber);
- };
-
- // Try again to move to the new page after 50 milliseconds.
- moveToNewPageHandler.postDelayed(moveToNewPageRunnable, 50);
- }
- }
-}
\ No newline at end of file
projects / PrivacyBrowserAndroid.git / blobdiff