Fix closing of tabs.

[PrivacyBrowserAndroid.git] / app / src / main / java / com / stoutner / privacybrowser / adapters / WebViewPagerAdapter.java

diff --git a/app/src/main/java/com/stoutner/privacybrowser/adapters/WebViewPagerAdapter.java b/app/src/main/java/com/stoutner/privacybrowser/adapters/WebViewPagerAdapter.java
new file mode 100644 (file)
index 0000000..3bec005
--- /dev/null
+++ b/app/src/main/java/com/stoutner/privacybrowser/adapters/WebViewPagerAdapter.java
@@ -0,0 +1,114 @@
+/*
+ * Copyright © 2019 Soren Stoutner <soren@stoutner.com>.
+ *
+ * This file is part of Privacy Browser <https://www.stoutner.com/privacy-browser>.
+ *
+ * Privacy Browser 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 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.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.stoutner.privacybrowser.adapters;
+
+import com.stoutner.privacybrowser.fragments.WebViewTabFragment;
+
+import java.util.LinkedList;
+
+import androidx.annotation.NonNull;
+import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentManager;
+import androidx.fragment.app.FragmentPagerAdapter;
+
+public class WebViewPagerAdapter extends FragmentPagerAdapter {
+    // The WebView fragments list contains all the WebViews.
+    private LinkedList<WebViewTabFragment> webViewFragmentsList = new LinkedList<>();
+
+    // Define the constructor.
+    public WebViewPagerAdapter(FragmentManager fragmentManager){
+        // Run the default commands.
+        super(fragmentManager);
+    }
+
+    @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
+    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).tabId;
+    }
+
+    public int getPositionForId(long pageId) {
+        // 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).tabId == pageId) {
+                // Store the position if they are a match.
+                position = i;
+            }
+
+            // Increment the counter.
+            i++;
+        }
+
+        // Return the position.
+        return position;
+    }
+
+    public void addPage(int pageNumber) {
+        // Add a new page.
+        webViewFragmentsList.add(WebViewTabFragment.createPage(pageNumber));
+
+        // Update the view pager.
+        notifyDataSetChanged();
+    }
+
+    public void deletePage(int pageNumber) {
+        // Delete the page.
+        webViewFragmentsList.remove(pageNumber);
+
+        // Update the view pager.
+        notifyDataSetChanged();
+    }
+
+    public WebViewTabFragment getPageFragment(int pageNumber) {
+        return webViewFragmentsList.get(pageNumber);
+    }
+}
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