2 * Copyright © 2019 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.adapters;
22 import androidx.annotation.NonNull;
23 import androidx.fragment.app.Fragment;
24 import androidx.fragment.app.FragmentManager;
25 import androidx.fragment.app.FragmentPagerAdapter;
26 import androidx.viewpager.widget.ViewPager;
28 import com.stoutner.privacybrowser.fragments.WebViewTabFragment;
30 import java.util.LinkedList;
32 public class WebViewPagerAdapter extends FragmentPagerAdapter {
33 // The WebView fragments list contains all the WebViews.
34 private LinkedList<WebViewTabFragment> webViewFragmentsList = new LinkedList<>();
36 // Define the constructor.
37 public WebViewPagerAdapter(FragmentManager fragmentManager){
38 // Run the default commands.
39 super(fragmentManager);
43 public int getCount() {
44 // Return the number of pages.
45 return webViewFragmentsList.size();
49 public int getItemPosition(@NonNull Object object) {
50 //noinspection SuspiciousMethodCalls
51 if (webViewFragmentsList.contains(object)) {
52 // Return the current page position.
53 //noinspection SuspiciousMethodCalls
54 return webViewFragmentsList.indexOf(object);
56 // The tab has been deleted.
62 public Fragment getItem(int pageNumber) {
63 // Get the fragment for a particular page. Page numbers are 0 indexed.
64 return webViewFragmentsList.get(pageNumber);
68 public long getItemId(int position) {
69 // Return the unique ID for this page.
70 return webViewFragmentsList.get(position).fragmentId;
73 public int getPositionForId(long fragmentId) {
74 // Initialize the position variable.
77 // Initialize the while counter.
80 // Find the current position of the WebView fragment with the given ID.
81 while (position < 0 && i < webViewFragmentsList.size()) {
82 // Check to see if the tab ID of this WebView matches the page ID.
83 if (webViewFragmentsList.get(i).fragmentId == fragmentId) {
84 // Store the position if they are a match.
88 // Increment the counter.
92 // Return the position.
96 public void addPage(int pageNumber, ViewPager webViewPager, String url) {
98 webViewFragmentsList.add(WebViewTabFragment.createPage(pageNumber, url));
100 // Update the view pager.
101 notifyDataSetChanged();
103 // Move to the new page if it isn't the first one.
104 if (pageNumber > 0) {
105 webViewPager.setCurrentItem(pageNumber);
109 public boolean deletePage(int pageNumber, ViewPager webViewPager) {
111 webViewFragmentsList.remove(pageNumber);
113 // Update the view pager.
114 notifyDataSetChanged();
116 // Return true if the selected page number did not change after the delete. This will cause the calling method to reset the current WebView to the new contents of this page number.
117 return (webViewPager.getCurrentItem() == pageNumber);
120 public WebViewTabFragment getPageFragment(int pageNumber) {
121 return webViewFragmentsList.get(pageNumber);