mirror of https://github.com/TeamNewPipe/NewPipe
112 lines
3.9 KiB
Java
112 lines
3.9 KiB
Java
package org.schabi.newpipe.about;
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import android.content.Context;
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import android.content.DialogInterface;
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import android.os.AsyncTask;
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import android.support.v7.app.AlertDialog;
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import android.webkit.WebView;
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import org.schabi.newpipe.R;
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import org.schabi.newpipe.util.ThemeHelper;
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import java.io.BufferedReader;
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import java.io.InputStreamReader;
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public class LicenseFragmentHelper extends AsyncTask<Object, Void, Integer> {
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private Context context;
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private License license;
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@Override
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protected Integer doInBackground(Object... objects) {
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context = (Context) objects[0];
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license = (License) objects[1];
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return 1;
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}
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@Override
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protected void onPostExecute(Integer result){
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String webViewData = getFormattedLicense(context, license);
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AlertDialog.Builder alert = new AlertDialog.Builder(context);
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alert.setTitle(license.getName());
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WebView wv = new WebView(context);
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wv.loadData(webViewData, "text/html; charset=UTF-8", null);
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alert.setView(wv);
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alert.setNegativeButton(android.R.string.ok, new DialogInterface.OnClickListener() {
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@Override
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public void onClick(DialogInterface dialog, int which) {
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dialog.dismiss();
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}
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});
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alert.show();
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}
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/**
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* @param context the context to use
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* @param license the license
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* @return String which contains a HTML formatted license page styled according to the context's theme
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*/
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public static String getFormattedLicense(Context context, License license) {
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if(context == null) {
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throw new NullPointerException("context is null");
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}
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if(license == null) {
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throw new NullPointerException("license is null");
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}
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String licenseContent = "";
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String webViewData;
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try {
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BufferedReader in = new BufferedReader(new InputStreamReader(context.getAssets().open(license.getFilename()), "UTF-8"));
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String str;
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while ((str = in.readLine()) != null) {
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licenseContent += str;
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}
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in.close();
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// split the HTML file and insert the stylesheet into the HEAD of the file
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String[] insert = licenseContent.split("</head>");
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webViewData = insert[0] + "<style type=\"text/css\">"
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+ getLicenseStylesheet(context) + "</style></head>"
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+ insert[1];
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} catch (Exception e) {
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throw new NullPointerException("could not get license file:" + getLicenseStylesheet(context));
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}
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return webViewData;
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}
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/**
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*
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* @param context
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* @return String which is a CSS stylesheet according to the context's theme
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*/
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public static String getLicenseStylesheet(Context context) {
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boolean isLightTheme = ThemeHelper.isLightThemeSelected(context);
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return "body{padding:12px 15px;margin:0;background:#"
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+ getHexRGBColor(context, isLightTheme
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? R.color.light_license_background_color
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: R.color.dark_license_background_color)
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+ ";color:#"
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+ getHexRGBColor(context, isLightTheme
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? R.color.light_license_text_color
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: R.color.dark_license_text_color) + ";}"
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+ "a[href]{color:#"
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+ getHexRGBColor(context, isLightTheme
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? R.color.light_youtube_primary_color
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: R.color.dark_youtube_primary_color) + ";}"
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+ "pre{white-space: pre-wrap;}";
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}
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/**
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* Cast R.color to a hexadecimal color value
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* @param context the context to use
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* @param color the color number from R.color
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* @return a six characters long String with hexadecimal RGB values
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*/
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public static String getHexRGBColor(Context context, int color) {
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return context.getResources().getString(color).substring(3);
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}
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}
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