mirror of
https://github.com/kiwix/kiwix-android.git
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Merge pull request #3034 from kiwix/Issue#3033
Convert CoreWebViewClient.java into kotlin
This commit is contained in:
Kelson
GitHub
commit
39cfd4b81e
@ -1,172 +0,0 @@
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/*
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* Kiwix Android
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* Copyright (c) 2019 Kiwix <android.kiwix.org>
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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package org.kiwix.kiwixmobile.core.main;
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import android.content.Context;
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import android.content.Intent;
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import android.net.Uri;
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import android.os.Build;
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import android.util.Log;
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import android.webkit.MimeTypeMap;
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import android.webkit.WebResourceRequest;
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import android.webkit.WebResourceResponse;
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import android.webkit.WebView;
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import android.webkit.WebViewClient;
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import androidx.annotation.Nullable;
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import androidx.core.content.FileProvider;
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import java.io.File;
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import java.util.HashMap;
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import org.kiwix.kiwixmobile.core.CoreApp;
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import org.kiwix.kiwixmobile.core.reader.ZimReaderContainer;
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import org.kiwix.kiwixmobile.core.utils.SharedPreferenceUtil;
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import org.kiwix.kiwixmobile.core.utils.files.FileUtils;
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import static org.kiwix.kiwixmobile.core.reader.ZimFileReader.CONTENT_PREFIX;
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import static org.kiwix.kiwixmobile.core.reader.ZimFileReader.UI_URI;
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import static org.kiwix.kiwixmobile.core.utils.ConstantsKt.TAG_KIWIX;
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public class CoreWebViewClient extends WebViewClient {
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private static final HashMap<String, String> DOCUMENT_TYPES = new HashMap<String, String>() {{
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put("epub", "application/epub+zip");
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put("pdf", "application/pdf");
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}};
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protected final WebViewCallback callback;
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protected final ZimReaderContainer zimReaderContainer;
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private final SharedPreferenceUtil sharedPreferenceUtil;
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private static String[] LEGACY_CONTENT_PREFIXES = new String[] {
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"zim://content/",
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Uri.parse("content://" + CoreApp.getInstance().getPackageName() + ".zim.base/").toString()
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};
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private String urlWithAnchor;
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public CoreWebViewClient(
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WebViewCallback callback,
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ZimReaderContainer zimReaderContainer,
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SharedPreferenceUtil sharedPreferenceUtil) {
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this.callback = callback;
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this.zimReaderContainer = zimReaderContainer;
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this.sharedPreferenceUtil = sharedPreferenceUtil;
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}
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@Override
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public boolean shouldOverrideUrlLoading(WebView view, String url) {
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callback.webViewUrlLoading();
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url = convertLegacyUrl(url);
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urlWithAnchor = url.contains("#") ? url : null;
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if (zimReaderContainer.isRedirect(url)) {
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if (handleEpubAndPdf(url)) {
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return true;
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}
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view.loadUrl(zimReaderContainer.getRedirect(url));
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return true;
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}
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if (url.startsWith(CONTENT_PREFIX)) {
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return handleEpubAndPdf(url);
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}
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if (url.startsWith("javascript:")) {
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// Allow javascript for HTML functions and code execution (EX: night mode)
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return true;
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}
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if (url.startsWith(UI_URI.toString())) {
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Log.e("KiwixWebViewClient", "UI Url " + url + " not supported.");
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//TODO: Document this code - what's a UI_URL?
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return true;
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}
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// Otherwise, the link is not for a page on my site, so launch another Activity that handles URLs
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Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
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callback.openExternalUrl(intent);
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return true;
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}
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private String convertLegacyUrl(String url) {
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for (String legacyContentPrefix : LEGACY_CONTENT_PREFIXES) {
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if (url.startsWith(legacyContentPrefix)) {
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return url.replace(legacyContentPrefix, CONTENT_PREFIX);
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}
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}
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return url;
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}
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private boolean handleEpubAndPdf(String url) {
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String extension = MimeTypeMap.getFileExtensionFromUrl(url);
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if (DOCUMENT_TYPES.containsKey(extension)) {
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File savedFile =
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FileUtils.downloadFileFromUrl(url, null, zimReaderContainer, sharedPreferenceUtil);
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if (savedFile != null && savedFile.exists()) {
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Context context = CoreApp.getInstance();
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Uri uri = Build.VERSION.SDK_INT >= Build.VERSION_CODES.N
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? FileProvider.getUriForFile(
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context,
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context.getPackageName() + ".fileprovider", savedFile)
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: Uri.fromFile(savedFile);
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Intent intent = new Intent(Intent.ACTION_VIEW);
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intent.setDataAndType(uri, DOCUMENT_TYPES.get(extension));
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intent.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
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intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
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}
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callback.openExternalUrl(intent);
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}
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return true;
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}
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return false;
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}
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@Override
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public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
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callback.webViewFailedLoading(failingUrl);
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}
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@Override
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public void onPageFinished(WebView view, String url) {
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boolean invalidUrl = url.equals(CONTENT_PREFIX + "null");
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Log.d(TAG_KIWIX, "invalidUrl = " + invalidUrl);
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if (invalidUrl) {
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return;
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}
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jumpToAnchor(view, url);
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callback.webViewUrlFinishedLoading();
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}
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/*
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* If 2 urls are the same aside from the `#` component then calling load
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* does not trigger our loading code and the webview will go to the anchor
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* */
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private void jumpToAnchor(WebView view, String loadedUrl) {
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if (urlWithAnchor != null && urlWithAnchor.startsWith(loadedUrl)) {
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view.loadUrl(urlWithAnchor);
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urlWithAnchor = null;
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}
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}
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@Nullable
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@Override
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public WebResourceResponse shouldInterceptRequest(WebView view, WebResourceRequest request) {
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String url = convertLegacyUrl(request.getUrl().toString());
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if (url.startsWith(CONTENT_PREFIX)) {
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return zimReaderContainer.load(url, request.getRequestHeaders());
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} else {
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return super.shouldInterceptRequest(view, request);
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}
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}
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}
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@ -0,0 +1,172 @@
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/*
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* Kiwix Android
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* Copyright (c) 2019 Kiwix <android.kiwix.org>
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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package org.kiwix.kiwixmobile.core.main
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import android.content.Context
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import android.content.Intent
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import android.net.Uri
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import android.os.Build
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import android.util.Log
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import android.webkit.MimeTypeMap
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import android.webkit.WebResourceRequest
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import android.webkit.WebResourceResponse
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import android.webkit.WebView
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import android.webkit.WebViewClient
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import androidx.core.content.FileProvider
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import org.kiwix.kiwixmobile.core.CoreApp.Companion.instance
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import org.kiwix.kiwixmobile.core.reader.ZimFileReader
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import org.kiwix.kiwixmobile.core.reader.ZimReaderContainer
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import org.kiwix.kiwixmobile.core.utils.SharedPreferenceUtil
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import org.kiwix.kiwixmobile.core.utils.TAG_KIWIX
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import org.kiwix.kiwixmobile.core.utils.files.FileUtils.downloadFileFromUrl
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open class CoreWebViewClient(
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protected val callback: WebViewCallback,
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protected val zimReaderContainer: ZimReaderContainer,
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private val sharedPreferenceUtil: SharedPreferenceUtil
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) : WebViewClient() {
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private var urlWithAnchor: String? = null
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@Suppress("ReturnCount")
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override fun shouldOverrideUrlLoading(view: WebView, loadedUrl: String): Boolean {
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var url = loadedUrl
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callback.webViewUrlLoading()
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url = convertLegacyUrl(url)
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urlWithAnchor = if (url.contains("#")) url else null
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if (zimReaderContainer.isRedirect(url)) {
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if (handleEpubAndPdf(url)) {
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return true
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}
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view.loadUrl(zimReaderContainer.getRedirect(url))
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return true
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}
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if (url.startsWith(ZimFileReader.CONTENT_PREFIX)) {
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return handleEpubAndPdf(url)
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}
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if (url.startsWith("javascript:")) {
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// Allow javascript for HTML functions and code execution (EX: night mode)
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return true
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}
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if (url.startsWith(ZimFileReader.UI_URI.toString())) {
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Log.e("KiwixWebViewClient", "UI Url $url not supported.")
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// Document this code - what's a UI_URL?
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return true
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}
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// Otherwise, the link is not for a page on my site, so launch another Activity that handles URLs
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val intent = Intent(Intent.ACTION_VIEW, Uri.parse(url))
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callback.openExternalUrl(intent)
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return true
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}
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private fun convertLegacyUrl(url: String): String {
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return LEGACY_CONTENT_PREFIXES
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.firstOrNull(url::startsWith)
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?.let { url.replace(it, ZimFileReader.CONTENT_PREFIX) }
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?: url
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}
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@Suppress("NestedBlockDepth")
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private fun handleEpubAndPdf(url: String): Boolean {
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val extension = MimeTypeMap.getFileExtensionFromUrl(url)
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if (DOCUMENT_TYPES.containsKey(extension)) {
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downloadFileFromUrl(
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url,
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null,
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zimReaderContainer,
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sharedPreferenceUtil
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)?.let {
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if (it.exists()) {
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val context: Context = instance
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val uri = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N)
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FileProvider.getUriForFile(
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context,
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context.packageName + ".fileprovider", it
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) else Uri.fromFile(it)
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val intent = Intent(Intent.ACTION_VIEW).apply {
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setDataAndType(uri, DOCUMENT_TYPES[extension])
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flags = Intent.FLAG_ACTIVITY_NO_HISTORY
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
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addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
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}
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}
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callback.openExternalUrl(intent)
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}
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}
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return true
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}
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return false
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}
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override fun onReceivedError(
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view: WebView,
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errorCode: Int,
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description: String,
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failingUrl: String
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) {
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callback.webViewFailedLoading(failingUrl)
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}
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override fun onPageFinished(view: WebView, url: String) {
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val invalidUrl = url == ZimFileReader.CONTENT_PREFIX + "null"
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Log.d(TAG_KIWIX, "invalidUrl = $invalidUrl")
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if (invalidUrl) {
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return
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}
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jumpToAnchor(view, url)
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callback.webViewUrlFinishedLoading()
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}
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/*
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* If 2 urls are the same aside from the `#` component then calling load
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* does not trigger our loading code and the webview will go to the anchor
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* */
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private fun jumpToAnchor(view: WebView, loadedUrl: String) {
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urlWithAnchor?.let {
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if (it.startsWith(loadedUrl)) {
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view.loadUrl(it)
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urlWithAnchor = null
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}
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}
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}
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override fun shouldInterceptRequest(
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view: WebView,
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request: WebResourceRequest
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): WebResourceResponse? {
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val url = convertLegacyUrl(request.url.toString())
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return if (url.startsWith(ZimFileReader.CONTENT_PREFIX)) {
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zimReaderContainer.load(url, request.requestHeaders)
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} else {
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super.shouldInterceptRequest(view, request)
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}
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}
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companion object {
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private val DOCUMENT_TYPES: HashMap<String?, String?> = object : HashMap<String?, String?>() {
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init {
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put("epub", "application/epub+zip")
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put("pdf", "application/pdf")
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}
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}
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private val LEGACY_CONTENT_PREFIXES = arrayOf(
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"zim://content/",
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Uri.parse("content://" + instance.packageName + ".zim.base/").toString()
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)
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}
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}
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