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package de.danoeh.antennapod.activity;
import android.content.res.TypedArray;
import android.graphics.Color;
import android.os.Build;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.MenuItem;
import android.view.View;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.LinearLayout;
import org.apache.commons.io.IOUtils;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.Charset;
import de.danoeh.antennapod.R;
import de.danoeh.antennapod.core.preferences.UserPreferences;
import rx.Single;
import rx.Subscription;
import rx.android.schedulers.AndroidSchedulers;
import rx.schedulers.Schedulers;
/**
* Displays the 'about' screen
*/
public class AboutActivity extends AppCompatActivity {
private static final String TAG = AboutActivity.class.getSimpleName();
private WebView webView;
private LinearLayout webViewContainer;
private Subscription subscription;
@Override
protected void onCreate(Bundle savedInstanceState) {
setTheme(UserPreferences.getTheme());
super.onCreate(savedInstanceState);
getSupportActionBar().setDisplayShowHomeEnabled(true);
setContentView(R.layout.about);
webViewContainer = (LinearLayout) findViewById(R.id.webViewContainer);
webView = (WebView) findViewById(R.id.webViewAbout);
webView.getSettings().setCacheMode(WebSettings.LOAD_NO_CACHE);
if (UserPreferences.getTheme() == R.style.Theme_AntennaPod_Dark) {
if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.ICE_CREAM_SANDWICH_MR1) {
webView.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
}
webView.setBackgroundColor(Color.TRANSPARENT);
}
webView.setWebViewClient(new WebViewClient() {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (!url.startsWith("http")) {
url = url.replace("file:///android_asset/", "");
loadAsset(url);
return true;
}
return false;
}
});
loadAsset("about.html");
}
private void loadAsset(String filename) {
subscription = Single.create(subscriber -> {
InputStream input = null;
try {
TypedArray res = AboutActivity.this.getTheme().obtainStyledAttributes(
new int[] { android.R.attr.textColorPrimary });
int colorResource = res.getColor(0, 0);
String colorString = String.format("#%06X", 0xFFFFFF & colorResource);
res.recycle();
input = getAssets().open(filename);
String webViewData = IOUtils.toString(input, Charset.defaultCharset());
if (!webViewData.startsWith("<!DOCTYPE html>")) {
webViewData = webViewData.replace("%", "%");
webViewData =
"<!DOCTYPE html>" +
"<html>" +
"<head>" +
" <meta http-equiv=\"Content-Type\" content=\"text/html;charset=UTF-8\">" +
" <style type=\"text/css\">" +
" @font-face {" +
" font-family: 'Roboto-Light';" +
" src: url('file:///android_asset/Roboto-Light.ttf');" +
" }" +
" * {" +
" color: %s;" +
" font-family: roboto-Light;" +
" font-size: 8pt;" +
" }" +
" </style>" +
"</head><body><p>" + webViewData + "</p></body></html>";
webViewData = webViewData.replace("\n", "<br/>");
}
webViewData = String.format(webViewData, colorString);
subscriber.onSuccess(webViewData);
} catch (IOException e) {
Log.e(TAG, Log.getStackTraceString(e));
subscriber.onError(e);
} finally {
IOUtils.closeQuietly(input);
}
})
.subscribeOn(Schedulers.newThread())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(
webViewData ->
webView.loadDataWithBaseURL("file:///android_asset/", webViewData.toString(), "text/html", "utf-8", "file:///android_asset/" + webViewData.toString()),
error -> Log.e(TAG, Log.getStackTraceString(error))
);
}
@Override
public void onBackPressed() {
if (webView.canGoBack()) {
webView.goBack();
} else {
super.onBackPressed();
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == android.R.id.home) {
onBackPressed();
return true;
} else {
return super.onOptionsItemSelected(item);
}
}
@Override
protected void onDestroy() {
super.onDestroy();
if(subscription != null) {
subscription.unsubscribe();
}
if (webViewContainer != null && webView != null) {
webViewContainer.removeAllViews();
webView.destroy();
}
}
}
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