Improve Markdown support

Close #259

app/build.gradle

@@ -53,7 +53,7 @@ dependencies {
     implementation 'com.android.support:design:26.0.0'
     implementation 'com.android.support:support-v4:26.0.0'
     implementation 'com.jakewharton:butterknife:8.7.0'
-    implementation 'us.feras.mdv:markdownview:1.1.0'
+    implementation 'com.atlassian.commonmark:commonmark:0.9.0'
     implementation 'org.bouncycastle:bcprov-jdk15on:1.57'
     implementation 'org.bouncycastle:bcpkix-jdk15on:1.57'
     implementation 'com.google.android.gms:play-services-safetynet:9.0.1'

app/src/main/java/com/topjohnwu/magisk/adapters/ReposAdapter.java

@@ -15,9 +15,9 @@ import android.widget.LinearLayout;
 import android.widget.TextView;
 
 import com.topjohnwu.magisk.R;
+import com.topjohnwu.magisk.asyncs.MarkDownWindow;
 import com.topjohnwu.magisk.asyncs.ProcessRepoZip;
 import com.topjohnwu.magisk.components.AlertDialogBuilder;
-import com.topjohnwu.magisk.components.MarkDownWindow;
 import com.topjohnwu.magisk.database.RepoDatabaseHelper;
 import com.topjohnwu.magisk.module.Module;
 import com.topjohnwu.magisk.module.Repo;
@@ -97,7 +97,8 @@ public class ReposAdapter extends SectionedAdapter<ReposAdapter.SectionHolder, R
         holder.author.setText(TextUtils.isEmpty(author) ? null : context.getString(R.string.author, author));
         holder.description.setText(repo.getDescription());
 
-        holder.infoLayout.setOnClickListener(v -> new MarkDownWindow(null, repo.getDetailUrl(), context));
+        holder.infoLayout.setOnClickListener(v ->
+                new MarkDownWindow((Activity) context, null, repo.getDetailUrl()).exec());
 
         holder.downloadImage.setOnClickListener(v -> {
             String filename = repo.getName() + "-" + repo.getVersion() + ".zip";

app/src/main/java/com/topjohnwu/magisk/asyncs/MarkDownWindow.java

@@ -0,0 +1,50 @@
+package com.topjohnwu.magisk.asyncs;
+
+import android.app.Activity;
+import android.support.v7.app.AlertDialog;
+import android.webkit.WebView;
+
+import com.topjohnwu.magisk.R;
+import com.topjohnwu.magisk.utils.WebService;
+
+import org.commonmark.node.Node;
+import org.commonmark.parser.Parser;
+import org.commonmark.renderer.html.HtmlRenderer;
+
+public class MarkDownWindow extends ParallelTask<Void, Void, String> {
+
+    private String mTitle, mUrl;
+
+    public MarkDownWindow(Activity context, String title, String url) {
+        super(context);
+        mTitle = title;
+        mUrl = url;
+    }
+
+    @Override
+    protected String doInBackground(Void... voids) {
+        String md = WebService.getString(mUrl);
+        Parser parser = Parser.builder().build();
+        HtmlRenderer renderer = HtmlRenderer.builder().build();
+        Node doc = parser.parse(md);
+        return renderer.render(doc);
+    }
+
+    @Override
+    protected void onPostExecute(String html) {
+        AlertDialog.Builder alert = new AlertDialog.Builder(getActivity());
+        alert.setTitle(mTitle);
+
+        WebView wv = new WebView(getActivity());
+
+        html = String.format(
+                "<link rel='stylesheet' type='text/css' href='file:///android_asset/%s.css'/> %s",
+                getMagiskManager().isDarkTheme ? "dark" : "light", html);
+
+        wv.loadDataWithBaseURL("fake://", html, "text/html", "UTF-8", null);
+
+        alert.setView(wv);
+        alert.setNegativeButton(R.string.close, (dialog, id) -> dialog.dismiss());
+        alert.show();
+    }
+}

app/src/main/java/com/topjohnwu/magisk/components/MarkDownWindow.java

@@ -1,31 +0,0 @@
-package com.topjohnwu.magisk.components;
-
-import android.content.Context;
-import android.support.v7.app.AlertDialog;
-
-import com.topjohnwu.magisk.MagiskManager;
-import com.topjohnwu.magisk.R;
-import com.topjohnwu.magisk.utils.Logger;
-import com.topjohnwu.magisk.utils.Utils;
-
-import us.feras.mdv.MarkdownView;
-
-public class MarkDownWindow {
-
-    public MarkDownWindow(String title, String url, Context context) {
-        MagiskManager magiskManager = Utils.getMagiskManager(context);
-        AlertDialog.Builder alert = new AlertDialog.Builder(context);
-        alert.setTitle(title);
-    
-        Logger.dev("WebView: URL = " + url);
-
-        MarkdownView md = new MarkdownView(context);
-        md.loadMarkdownFile(url, "file:///android_asset/" +
-                (magiskManager.isDarkTheme ? "dark" : "light") + ".css");
-
-        alert.setView(md);
-        alert.setNegativeButton(R.string.close, (dialog, id) -> dialog.dismiss());
-        alert.show();
-    }
-
-}