[File View] add highlight sourcecode (#187)

app/build.gradle

@@ -68,4 +68,5 @@ dependencies {
     implementation "com.github.HamidrezaAmz:BreadcrumbsView:0.2.9"
     implementation "commons-io:commons-io:2.6"
     implementation "com.github.chrisbanes:PhotoView:2.3.0"
+    implementation "com.pddstudio:highlightjs-android:1.5.0"
 }

app/src/main/java/org/mian/gitnex/activities/FileViewActivity.java

@@ -16,6 +16,8 @@ import androidx.annotation.NonNull;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.appcompat.widget.Toolbar;
 import com.github.chrisbanes.photoview.PhotoView;
+import com.pddstudio.highlightjs.HighlightJsView;
+import com.pddstudio.highlightjs.models.Theme;
 import org.apache.commons.io.FilenameUtils;
 import org.mian.gitnex.R;
 import org.mian.gitnex.clients.RetrofitClient;
@@ -35,6 +37,7 @@ public class FileViewActivity extends AppCompatActivity {
 
     private View.OnClickListener onClickListener;
     private TextView singleFileContents;
+    private HighlightJsView singleCodeContents;
     private PhotoView imageView;
     final Context ctx = this;
     private ProgressBar mProgressBar;
@@ -61,6 +64,7 @@ public class FileViewActivity extends AppCompatActivity {
 
         ImageView closeActivity = findViewById(R.id.close);
         singleFileContents = findViewById(R.id.singleFileContents);
+        singleCodeContents = findViewById(R.id.singleCodeContents);
         imageView = findViewById(R.id.imageView);
         singleFileContents.setVisibility(View.GONE);
         mProgressBar = findViewById(R.id.progress_bar);
@@ -105,19 +109,34 @@ public class FileViewActivity extends AppCompatActivity {
                         String fileExtension = FilenameUtils.getExtension(filename);
                         mProgressBar.setVisibility(View.GONE);
 
-                        if(fileExtension.equals("png") || fileExtension.equals("jpg") || fileExtension.equals("jpeg") || fileExtension.equals("gif")) {
+                        if(appUtil.imageExtension(fileExtension)) { // file is image
 
                             singleFileContents.setVisibility(View.GONE);
+                            singleCodeContents.setVisibility(View.GONE);
                             imageView.setVisibility(View.VISIBLE);
+
                             imageData = Base64.decode(response.body().getContent(), Base64.DEFAULT);
                             Drawable imageDrawable = new BitmapDrawable(getResources(), BitmapFactory.decodeByteArray(imageData, 0, imageData.length));
                             imageView.setImageDrawable(imageDrawable);
 
                         }
-                        else {
+                        else if (appUtil.sourceCodeExtension(fileExtension)) { // file is sourcecode
 
                             imageView.setVisibility(View.GONE);
+                            singleFileContents.setVisibility(View.GONE);
+                            singleCodeContents.setVisibility(View.VISIBLE);
+
+                            singleCodeContents.setTheme(Theme.GRUVBOX_DARK);
+                            singleCodeContents.setShowLineNumbers(true);
+                            singleCodeContents.setSource(appUtil.decodeBase64(response.body().getContent()));
+
+                        }
+                        else { // file type not known - plain text view
+
+                            imageView.setVisibility(View.GONE);
+                            singleCodeContents.setVisibility(View.GONE);
                             singleFileContents.setVisibility(View.VISIBLE);
+
                             singleFileContents.setText(appUtil.decodeBase64(response.body().getContent()));
 
                         }

app/src/main/java/org/mian/gitnex/util/AppUtil.java

@@ -13,6 +13,7 @@ import java.net.HttpURLConnection;
 import java.net.URL;
 import java.nio.charset.StandardCharsets;
 import java.text.DecimalFormat;
+import java.util.Arrays;
 import java.util.Calendar;
 import java.util.Locale;
 
@@ -145,16 +146,16 @@ public class AppUtil {
 
         String sMonth;
         if (Integer.parseInt(month) < 10) {
-            sMonth = "0"+String.valueOf(month);
+            sMonth = "0"+ month;
         } else {
-            sMonth = String.valueOf(month);
+            sMonth = month;
         }
 
         String sDay;
         if (Integer.parseInt(day) < 10) {
-            sDay = "0"+String.valueOf(day);
+            sDay = "0"+ day;
         } else {
-            sDay = String.valueOf(day);
+            sDay = day;
         }
 
         return year + "-" + sMonth + "-" + sDay;
@@ -170,14 +171,14 @@ public class AppUtil {
 
         String sMin;
         if ((mMinute) < 10) {
-            sMin = "0"+String.valueOf(mMinute);
+            sMin = "0"+ mMinute;
         } else {
             sMin = String.valueOf(mMinute);
         }
 
         String sSec;
         if ((mSeconds) < 10) {
-            sSec = "0"+String.valueOf(mSeconds);
+            sSec = "0"+ mSeconds;
         } else {
             sSec = String.valueOf(mSeconds);
         }
@@ -210,4 +211,23 @@ public class AppUtil {
 
     }
 
+    public Boolean sourceCodeExtension(String ext) {
+
+        String[] extValues = new String[] {"md", "json", "java", "go", "php", "c", "cc", "cpp", "cxx", "cyc", "m",
+                "cs", "bash", "sh", "bsh", "cv", "python", "perl", "pm", "rb", "ruby", "javascript",
+                "coffee", "rc", "rs", "rust", "basic", "clj", "css", "dart", "lisp", "erl", "hs", "lsp", "rkt",
+                "ss", "llvm", "ll", "lua", "matlab", "pascal", "r", "scala", "sql", "latex", "tex", "vb", "vbs",
+                "vhd", "tcl", "wiki.meta", "yaml", "yml", "markdown", "xml", "proto", "regex", "py", "pl", "js"};
+
+        return Arrays.asList(extValues).contains(ext);
+
+    }
+
+    public Boolean imageExtension(String ext) {
+
+        String[] extValues = new String[] {"jpg", "jpeg", "gif", "png", "ico"};
+
+        return Arrays.asList(extValues).contains(ext);
+
+    }
 }

app/src/main/res/layout/activity_file_view.xml

@@ -1,10 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <RelativeLayout
+    xmlns:tools="http://schemas.android.com/tools"
+    xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    xmlns:tools="http://schemas.android.com/tools"
     android:orientation="vertical"
-    xmlns:android="http://schemas.android.com/apk/res/android"
     android:background="@color/colorPrimary">
 
     <com.google.android.material.appbar.AppBarLayout
@@ -49,7 +49,7 @@
         android:layout_marginTop="50dp"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:background="@color/black"
+        android:background="@color/colorPrimary"
         android:orientation="vertical">
 
         <ScrollView
@@ -70,6 +70,14 @@
 
     </LinearLayout>
 
+    <com.pddstudio.highlightjs.HighlightJsView
+        android:id="@+id/singleCodeContents"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:textSize="14sp"
+        android:layout_marginTop="42dp"
+        android:visibility="gone" />
+
     <com.github.chrisbanes.photoview.PhotoView
         android:id="@+id/imageView"
         android:layout_centerInParent="true"

build.gradle

@@ -7,7 +7,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.5.1'
+        classpath 'com.android.tools.build:gradle:3.5.2'
 
     }
 }