Moving HighlightJS into app. (#477)

Final fixes and improvements.

Fixing crash of app in Android 5.0

Removing unused theme.

Moving HighlightJS to app.

Reviewed-on: https://gitea.com/gitnex/GitNex/pulls/477
Reviewed-by: M M Arif <mmarif@swatian.com>

app/build.gradle

@@ -38,7 +38,7 @@ dependencies {
     def acra = "5.5.0"
 
     implementation fileTree(include: ['*.jar'], dir: 'libs')
-    implementation "androidx.appcompat:appcompat:1.1.0"
+    implementation "androidx.appcompat:appcompat:1.2.0-beta01"
     implementation "com.google.android.material:material:1.2.0-alpha06"
     implementation "androidx.constraintlayout:constraintlayout:1.1.3"
     implementation "androidx.legacy:legacy-support-v4:1.0.0"
@@ -79,7 +79,6 @@ dependencies {
     implementation "com.github.HamidrezaAmz:BreadcrumbsView:0.2.9"
     implementation "commons-io:commons-io:20030203.000550"
     implementation "com.github.chrisbanes:PhotoView:2.3.0"
-    implementation "com.pddstudio:highlightjs-android:1.5.0"
     implementation "com.github.barteksc:android-pdf-viewer:3.2.0-beta.1"
     implementation "ch.acra:acra-mail:$acra"
     implementation "ch.acra:acra-limiter:$acra"

app/src/main/assets/highlightjs/highlightjs-line-numbers.min.js

@@ -0,0 +1 @@
+!function(e){"use strict";function t(){"complete"===document.readyState?n():e.addEventListener("DOMContentLoaded",n)}function n(){try{var e=document.querySelectorAll("code.hljs");for(var t in e)e.hasOwnProperty(t)&&r(e[t])}catch(n){console.error("LineNumbers error: ",n)}}function r(e){if("object"==typeof e){var t=e.parentNode,n=o(t.textContent);if(n>1){for(var r="",c=0;n>c;c++)r+=c+1+"\n";var l=document.createElement("code");l.className="hljs hljs-line-numbers",l.style["float"]="left",l.textContent=r,t.insertBefore(l,e)}}}function o(e){if(0===e.length)return 0;var t=/\r\n|\r|\n/g,n=e.match(t);return n=n?n.length:0,e[e.length-1].match(t)||(n+=1),n}"undefined"==typeof e.hljs?console.error("highlight.js not detected!"):(e.hljs.initLineNumbersOnLoad=t,e.hljs.lineNumbersBlock=r)}(window);

app/src/main/assets/highlightjs/themes/androidstudio.css

@@ -0,0 +1,66 @@
+/*
+Date: 24 Fev 2015
+Author: Pedro Oliveira <kanytu@gmail . com>
+*/
+
+.hljs {
+  color: #a9b7c6;
+  background: #282b2e;
+  display: block;
+  overflow-x: auto;
+  padding: 0.5em;
+}
+
+.hljs-number,
+.hljs-literal,
+.hljs-symbol,
+.hljs-bullet {
+  color: #6897BB;
+}
+
+.hljs-keyword,
+.hljs-selector-tag,
+.hljs-deletion {
+  color: #cc7832;
+}
+
+.hljs-variable,
+.hljs-template-variable,
+.hljs-link {
+  color: #629755;
+}
+
+.hljs-comment,
+.hljs-quote {
+  color: #808080;
+}
+
+.hljs-meta {
+  color: #bbb529;
+}
+
+.hljs-string,
+.hljs-attribute,
+.hljs-addition {
+  color: #6A8759;
+}
+
+.hljs-section,
+.hljs-title,
+.hljs-type {
+  color: #ffc66d;
+}
+
+.hljs-name,
+.hljs-selector-id,
+.hljs-selector-class {
+  color: #e8bf6a;
+}
+
+.hljs-emphasis {
+  font-style: italic;
+}
+
+.hljs-strong {
+  font-weight: bold;
+}

app/src/main/assets/highlightjs/themes/arduino-light.css

@@ -0,0 +1,87 @@
+/*
+
+Arduino® Light Theme - Stefania Mellai <s.mellai@arduino.cc>
+
+*/
+
+.hljs {
+  display: block;
+  overflow-x: auto;
+  padding: 0.5em;
+  background: #FFFFFF;
+}
+
+.hljs,
+.hljs-subst {
+  color: #434f54;
+}
+
+.hljs-keyword,
+.hljs-attribute,
+.hljs-selector-tag,
+.hljs-doctag,
+.hljs-name {
+  color: #00979D;
+}
+
+.hljs-built_in,
+.hljs-literal,
+.hljs-bullet,
+.hljs-code,
+.hljs-addition {
+  color: #D35400;
+}
+
+.hljs-regexp,
+.hljs-symbol,
+.hljs-variable,
+.hljs-template-variable,
+.hljs-link,
+.hljs-selector-attr,
+.hljs-selector-pseudo {
+  color: #00979D;
+}
+
+.hljs-type,
+.hljs-string,
+.hljs-selector-id,
+.hljs-selector-class,
+.hljs-quote,
+.hljs-template-tag,
+.hljs-deletion {
+  color: #005C5F;
+}
+
+.hljs-title,
+.hljs-section {
+  color: #880000;
+  font-weight: bold;
+}
+
+.hljs-comment {
+  color: rgba(149,165,166,.8);
+}
+
+.hljs-meta-keyword {
+  color: #728E00;
+}
+
+.hljs-meta {
+  color: #434f54;
+}
+
+.hljs-emphasis {
+  font-style: italic;
+}
+
+.hljs-strong {
+  font-weight: bold;
+}
+
+.hljs-function {
+  color: #728E00;
+}
+
+.hljs-number {
+  color: #8A7B52;  
+}

app/src/main/assets/highlightjs/themes/far.css

@@ -0,0 +1,71 @@
+/*
+
+FAR Style (c) MajestiC <majestic2k@gmail.com>
+
+*/
+
+.hljs {
+  display: block;
+  overflow-x: auto;
+  padding: 0.5em;
+  background: #000080;
+}
+
+.hljs,
+.hljs-subst {
+  color: #0ff;
+}
+
+.hljs-string,
+.hljs-attribute,
+.hljs-symbol,
+.hljs-bullet,
+.hljs-built_in,
+.hljs-builtin-name,
+.hljs-template-tag,
+.hljs-template-variable,
+.hljs-addition {
+  color: #ff0;
+}
+
+.hljs-keyword,
+.hljs-selector-tag,
+.hljs-section,
+.hljs-type,
+.hljs-name,
+.hljs-selector-id,
+.hljs-selector-class,
+.hljs-variable {
+  color: #fff;
+}
+
+.hljs-comment,
+.hljs-quote,
+.hljs-doctag,
+.hljs-deletion {
+  color: #888;
+}
+
+.hljs-number,
+.hljs-regexp,
+.hljs-literal,
+.hljs-link {
+  color: #0f0;
+}
+
+.hljs-meta {
+  color: #008080;
+}
+
+.hljs-keyword,
+.hljs-selector-tag,
+.hljs-title,
+.hljs-section,
+.hljs-name,
+.hljs-strong {
+  font-weight: bold;
+}
+
+.hljs-emphasis {
+  font-style: italic;
+}

app/src/main/assets/highlightjs/themes/github.css

@@ -0,0 +1,99 @@
+/*
+
+github.com style (c) Vasily Polovnyov <vast@whiteants.net>
+
+*/
+
+.hljs {
+  display: block;
+  overflow-x: auto;
+  padding: 0.5em;
+  color: #333;
+  background: #f8f8f8;
+}
+
+.hljs-comment,
+.hljs-quote {
+  color: #998;
+  font-style: italic;
+}
+
+.hljs-keyword,
+.hljs-selector-tag,
+.hljs-subst {
+  color: #333;
+  font-weight: bold;
+}
+
+.hljs-number,
+.hljs-literal,
+.hljs-variable,
+.hljs-template-variable,
+.hljs-tag .hljs-attr {
+  color: #008080;
+}
+
+.hljs-string,
+.hljs-doctag {
+  color: #d14;
+}
+
+.hljs-title,
+.hljs-section,
+.hljs-selector-id {
+  color: #900;
+  font-weight: bold;
+}
+
+.hljs-subst {
+  font-weight: normal;
+}
+
+.hljs-type,
+.hljs-class .hljs-title {
+  color: #458;
+  font-weight: bold;
+}
+
+.hljs-tag,
+.hljs-name,
+.hljs-attribute {
+  color: #000080;
+  font-weight: normal;
+}
+
+.hljs-regexp,
+.hljs-link {
+  color: #009926;
+}
+
+.hljs-symbol,
+.hljs-bullet {
+  color: #990073;
+}
+
+.hljs-built_in,
+.hljs-builtin-name {
+  color: #0086b3;
+}
+
+.hljs-meta {
+  color: #999;
+  font-weight: bold;
+}
+
+.hljs-deletion {
+  background: #fdd;
+}
+
+.hljs-addition {
+  background: #dfd;
+}
+
+.hljs-emphasis {
+  font-style: italic;
+}
+
+.hljs-strong {
+  font-weight: bold;
+}

app/src/main/assets/highlightjs/themes/ir-black.css

@@ -0,0 +1,73 @@
+/*
+  IR_Black style (c) Vasily Mikhailitchenko <vaskas@programica.ru>
+*/
+
+.hljs {
+  display: block;
+  overflow-x: auto;
+  padding: 0.5em;
+  background: #000;
+  color: #f8f8f8;
+}
+
+.hljs-comment,
+.hljs-quote,
+.hljs-meta {
+  color: #7c7c7c;
+}
+
+.hljs-keyword,
+.hljs-selector-tag,
+.hljs-tag,
+.hljs-name {
+  color: #96cbfe;
+}
+
+.hljs-attribute,
+.hljs-selector-id {
+  color: #ffffb6;
+}
+
+.hljs-string,
+.hljs-selector-attr,
+.hljs-selector-pseudo,
+.hljs-addition {
+  color: #a8ff60;
+}
+
+.hljs-subst {
+  color: #daefa3;
+}
+
+.hljs-regexp,
+.hljs-link {
+  color: #e9c062;
+}
+
+.hljs-title,
+.hljs-section,
+.hljs-type,
+.hljs-doctag {
+  color: #ffffb6;
+}
+
+.hljs-symbol,
+.hljs-bullet,
+.hljs-variable,
+.hljs-template-variable,
+.hljs-literal {
+  color: #c6c5fe;
+}
+
+.hljs-number,
+.hljs-deletion {
+  color:#ff73fd;
+}
+
+.hljs-emphasis {
+  font-style: italic;
+}
+
+.hljs-strong {
+  font-weight: bold;
+}

app/src/main/assets/highlightjs/themes/monokai-sublime.css

@@ -0,0 +1,83 @@
+/*
+
+Monokai Sublime style. Derived from Monokai by noformnocontent http://nn.mit-license.org/
+
+*/
+
+.hljs {
+  display: block;
+  overflow-x: auto;
+  padding: 0.5em;
+  background: #23241f;
+}
+
+.hljs,
+.hljs-tag,
+.hljs-subst {
+  color: #f8f8f2;
+}
+
+.hljs-strong,
+.hljs-emphasis {
+  color: #a8a8a2;
+}
+
+.hljs-bullet,
+.hljs-quote,
+.hljs-number,
+.hljs-regexp,
+.hljs-literal,
+.hljs-link {
+  color: #ae81ff;
+}
+
+.hljs-code,
+.hljs-title,
+.hljs-section,
+.hljs-selector-class {
+  color: #a6e22e;
+}
+
+.hljs-strong {
+  font-weight: bold;
+}
+
+.hljs-emphasis {
+  font-style: italic;
+}
+
+.hljs-keyword,
+.hljs-selector-tag,
+.hljs-name,
+.hljs-attr {
+  color: #f92672;
+}
+
+.hljs-symbol,
+.hljs-attribute {
+  color: #66d9ef;
+}
+
+.hljs-params,
+.hljs-class .hljs-title {
+  color: #f8f8f2;
+}
+
+.hljs-string,
+.hljs-type,
+.hljs-built_in,
+.hljs-builtin-name,
+.hljs-selector-id,
+.hljs-selector-attr,
+.hljs-selector-pseudo,
+.hljs-addition,
+.hljs-variable,
+.hljs-template-variable {
+  color: #e6db74;
+}
+
+.hljs-comment,
+.hljs-deletion,
+.hljs-meta {
+  color: #75715e;
+}

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

@@ -28,14 +28,14 @@ import androidx.core.content.ContextCompat;
 import com.github.barteksc.pdfviewer.PDFView;
 import com.github.barteksc.pdfviewer.util.FitPolicy;
 import com.github.chrisbanes.photoview.PhotoView;
-import com.pddstudio.highlightjs.HighlightJsView;
-import com.pddstudio.highlightjs.models.Theme;
 import org.apache.commons.io.FileUtils;
 import org.mian.gitnex.R;
 import org.mian.gitnex.clients.RetrofitClient;
 import org.mian.gitnex.fragments.BottomSheetFileViewerFragment;
 import org.mian.gitnex.helpers.AlertDialogs;
 import org.mian.gitnex.helpers.Toasty;
+import org.mian.gitnex.helpers.highlightjs.HighlightJsView;
+import org.mian.gitnex.helpers.highlightjs.models.Theme;
 import org.mian.gitnex.models.Files;
 import org.mian.gitnex.util.AppUtil;
 import org.mian.gitnex.util.TinyDB;
@@ -196,7 +196,6 @@ public class FileViewActivity extends BaseActivity implements BottomSheetFileVie
 									singleCodeContents.setTheme(Theme.MONOKAI_SUBLIME);
 							}
 
-							singleCodeContents.setShowLineNumbers(true);
 							singleCodeContents.setSource(appUtil.decodeBase64(response.body().getContent()));
 
 						}

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

@@ -21,8 +21,8 @@ public class SettingsFileViewerActivity extends BaseActivity {
 	private Context appCtx;
 	private View.OnClickListener onClickListener;
 
-	private static String[] fileveiwerSourceCodeThemesList = {"Sublime", "Arduino Light", "Github", "Far ", "Ir Black", "Android Studio"};
+	private static String[] fileViewerSourceCodeThemesList = {"Sublime", "Arduino Light", "Github", "Far ", "Ir Black", "Android Studio"};
-	private static int fileveiwerSourceCodeThemesSelectedChoice = 0;
+	private static int fileViewerSourceCodeThemesSelectedChoice = 0;
 
 	@Override
 	protected int getLayoutResourceId() {
@@ -43,18 +43,18 @@ public class SettingsFileViewerActivity extends BaseActivity {
 		initCloseListener();
 		closeActivity.setOnClickListener(onClickListener);
 
-		final TextView fileveiwerSourceCodeThemesSelected = findViewById(R.id.sourceCodeThemeSelected); // setter for fileviewer theme
+		final TextView fileViewerSourceCodeThemesSelected = findViewById(R.id.sourceCodeThemeSelected); // setter for fileviewer theme
 
 		LinearLayout sourceCodeThemeFrame = findViewById(R.id.sourceCodeThemeFrame);
 
 		Switch pdfModeSwitch = findViewById(R.id.switchPdfMode);
 
 		if(!tinyDb.getString("fileviewerSourceCodeThemeStr").isEmpty()) {
-			fileveiwerSourceCodeThemesSelected.setText(tinyDb.getString("fileviewerSourceCodeThemeStr"));
+			fileViewerSourceCodeThemesSelected.setText(tinyDb.getString("fileviewerSourceCodeThemeStr"));
 		}
 
-		if(fileveiwerSourceCodeThemesSelectedChoice == 0) {
+		if(fileViewerSourceCodeThemesSelectedChoice == 0) {
-			fileveiwerSourceCodeThemesSelectedChoice = tinyDb.getInt("fileviewerThemeId");
+			fileViewerSourceCodeThemesSelectedChoice = tinyDb.getInt("fileviewerThemeId");
 		}
 
 		if(tinyDb.getBoolean("enablePdfMode")) {
@@ -70,18 +70,18 @@ public class SettingsFileViewerActivity extends BaseActivity {
 			AlertDialog.Builder fvtsBuilder = new AlertDialog.Builder(SettingsFileViewerActivity.this);
 
 			fvtsBuilder.setTitle(R.string.fileviewerSourceCodeThemeSelectorDialogTitle);
-			if(fileveiwerSourceCodeThemesSelectedChoice != -1) {
+			if(fileViewerSourceCodeThemesSelectedChoice != -1) {
 				fvtsBuilder.setCancelable(true);
 			}
 			else {
 				fvtsBuilder.setCancelable(false);
 			}
 
-			fvtsBuilder.setSingleChoiceItems(fileveiwerSourceCodeThemesList, fileveiwerSourceCodeThemesSelectedChoice, (dialogInterfaceTheme, i) -> {
+			fvtsBuilder.setSingleChoiceItems(fileViewerSourceCodeThemesList, fileViewerSourceCodeThemesSelectedChoice, (dialogInterfaceTheme, i) -> {
 
-				fileveiwerSourceCodeThemesSelectedChoice = i;
+				fileViewerSourceCodeThemesSelectedChoice = i;
-				fileveiwerSourceCodeThemesSelected.setText(fileveiwerSourceCodeThemesList[i]);
+				fileViewerSourceCodeThemesSelected.setText(fileViewerSourceCodeThemesList[i]);
-				tinyDb.putString("fileviewerSourceCodeThemeStr", fileveiwerSourceCodeThemesList[i]);
+				tinyDb.putString("fileviewerSourceCodeThemeStr", fileViewerSourceCodeThemesList[i]);
 				tinyDb.putInt("fileviewerSourceCodeThemeId", i);
 
 				dialogInterfaceTheme.dismiss();
@@ -113,9 +113,7 @@ public class SettingsFileViewerActivity extends BaseActivity {
 	}
 
 	private void initCloseListener() {
-		onClickListener = view -> {
+		onClickListener = view -> finish();
-			finish();
-		};
 	}
 
 }

app/src/main/java/org/mian/gitnex/helpers/highlightjs/HighlightJsView.java

@@ -0,0 +1,112 @@
+package org.mian.gitnex.helpers.highlightjs;
+
+import android.annotation.SuppressLint;
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.View;
+import android.webkit.WebSettings;
+import android.webkit.WebView;
+
+import org.mian.gitnex.helpers.highlightjs.models.Language;
+import org.mian.gitnex.helpers.highlightjs.models.Theme;
+import org.mian.gitnex.helpers.highlightjs.utils.SourceUtils;
+
+/**
+ * This Class was created by Patrick J
+ * on 09.06.16. (modified by opyale)
+ */
+
+public class HighlightJsView extends WebView {
+
+    private Language language = Language.AUTO_DETECT;
+    private Theme theme = Theme.DEFAULT;
+
+	private boolean zoomSupport = false;
+    private boolean showLineNumbers = true;
+    private TextWrap textWrap = TextWrap.NO_WRAP;
+
+    public HighlightJsView(Context context) {
+
+        super(context);
+        setup();
+    }
+
+    public HighlightJsView(Context context, AttributeSet attrs) {
+
+        super(context, attrs);
+        setup();
+    }
+
+    public HighlightJsView(Context context, AttributeSet attrs, int defStyleAttr) {
+
+        super(context, attrs, defStyleAttr);
+        setup();
+    }
+
+    @SuppressLint("SetJavaScriptEnabled")
+    private void setup() {
+
+        WebSettings settings = getSettings();
+
+        settings.setJavaScriptEnabled(true);
+        settings.setBuiltInZoomControls(true);
+        settings.setSupportZoom(zoomSupport);
+        settings.setDisplayZoomControls(false);
+
+        setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
+
+    }
+
+	private void changeZoomSettings(boolean enable) {
+
+		this.zoomSupport = enable;
+		getSettings().setSupportZoom(enable);
+	}
+
+    public void setSource(String source) {
+
+        source = (source == null) ? " " : source;
+
+        String html_content = SourceUtils.generateContent(source, theme.getName(), language.getName(), zoomSupport, showLineNumbers, textWrap);
+        loadDataWithBaseURL("file:///android_asset/", html_content, "text/html", "utf-8", null);
+
+    }
+
+    public void refresh() {
+
+        super.reload();
+    }
+
+    public void setHighlightLanguage(Language language) {
+        this.language = language;
+    }
+
+    public void setTheme(Theme theme) {
+        this.theme = theme;
+    }
+
+	public void setTextWrap(TextWrap textWrap) {
+    	this.textWrap = textWrap;
+    }
+
+    public Language getHighlightLanguage() {
+        return language;
+    }
+
+    public Theme getTheme() {
+        return theme;
+    }
+
+	public void setZoomSupportEnabled(boolean supportZoom) {
+		changeZoomSettings(supportZoom);
+	}
+
+	public void setShowLineNumbers(boolean showLineNumbers) {
+        this.showLineNumbers = showLineNumbers;
+    }
+
+	public enum TextWrap {
+		NO_WRAP, WORD_WRAP, BREAK_ALL
+	}
+
+}

app/src/main/java/org/mian/gitnex/helpers/highlightjs/models/Language.java

@@ -0,0 +1,181 @@
+package org.mian.gitnex.helpers.highlightjs.models;
+
+/**
+ * This Class was created by Patrick J
+ * on 09.06.16.
+ */
+
+public enum Language {
+    AUTO_DETECT(null),
+    DISABLE_HIGHLIGHT("nohighlight"),
+    _1C("1c"),
+    ABNF("abnf"),
+    ACCESS_LOGS("accesslog"),
+    ADA("ada"),
+    ARM_ASSEMBLER("arm"),
+    AVR_ASSEMBLER("avrasm"),
+    ACTION_SCRIPT("actionscript"),
+    APACHE("apache"),
+    APPLE_SCRIPT("applescript"),
+    ASCII_DOC("asciidoc"),
+    ASPECT_J("aspectj"),
+    AUTO_HOTKEY("autohotkey"),
+    AUTO_IT("autoit"),
+    AXAPTA("axapta"),
+    AWK("awk"),
+    BASH("bash"),
+    SHELL("sh"),
+    ZSH("zsh"),
+    BASIC("basic"),
+    BNF("bnf"),
+    BRAINFUCK("brainfuck"),
+    C("c"),
+    C_SHARP("csharp"),
+    C_PLUS_PLUS("cpp"),
+    CACHE_OBJECT_SCRIPT("cos"),
+    C_MAKE("cmake"),
+    COQ("coq"),
+    CSP("csp"),
+    CSS("css"),
+    CAPTAIN_PROTO("capnproto"),
+    CLEAN("clean"),
+    CLOJURE("clojure"),
+    COFFEE_SCRIPT("coffeescript"),
+    CRMSH("crmsh"),
+    CRYSTAL("crystal"),
+    D("d"),
+    DNS_ZONE_FILE("dns"),
+    DOS("dos"),
+    BATCH("bat"),
+    DART("dart"),
+    DELPHI("delphi"),
+    DIFF("diff"),
+    DJANGO("django"),
+    DOCKER_FILE("dockerfile"),
+    DSCONFIG("dsconfig"),
+    DTS("dts"),
+    DUST("dust"),
+    EBNF("ebnf"),
+    ELIXIR("elixir"),
+    ELM("elm"),
+    ERLANG("erlang"),
+    EXCEL("excel"),
+    F_SHARP("fsharp"),
+    FIX("fix"),
+    FLIX("flix"),
+    FORTRAN("fortran"),
+    G_CODE("gcode"),
+    GAMS("gams"),
+    GAUSS("gauss"),
+    GHERKIN("gherkin"),
+    GO("go"),
+    GOLO("golo"),
+    GRADLE("gradle"),
+    GROOVY("groovy"),
+    HTML("html"),
+    XML("xml"),
+    HTTP("http"),
+    HAML("haml"),
+    HANDLEBARS("hbs"),
+    HASKELL("hs"),
+    HAXE("hx"),
+    HY("hy"),
+    INI("ini"),
+    INFORM7("i7"),
+    IRPF90("irpf90"),
+    JSON("json"),
+    JAVA("java"),
+    JAVA_SCRIPT("javascript"),
+    LASSO("lasso"),
+	LEAF("leaf"),
+    LESS("less"),
+    LDIF("ldif"),
+    LISP("lisp"),
+    LIVE_CODE_SERVER("livecodeserver"),
+    LIVE_SCRIPT("livescript"),
+    LLVM("llvm"),
+    LUA("lua"),
+    MAKEFILE("makefile"),
+    MARKDOWN("md"),
+    MATHEMATICA("mma"),
+    MATLAB("matlab"),
+    MAXIMA("maxima"),
+    MAYA_EMBEDDED_LANGUAGE("mel"),
+    MERCURY("mercury"),
+    MIZAR("mizar"),
+    MOJOLICIOUS("mojolicious"),
+    MONKEY("monkey"),
+    MOONSCRIPT("moonscript"),
+	N1QL("n1ql"),
+    NSIS("nsis"),
+    NGINX("nginx"),
+    NIMROD("nimrod"),
+    NIX("nix"),
+    O_CAML("ocaml"),
+    OBJECTIVE_C("objectivec"),
+    OPENGL_SHADING_LANGUAGE("glsl"),
+    OPEN_SCAD("scad"),
+    ORACLE_RULES_LANGUAGE("ruleslanguage"),
+    OXYGENE("oxygene"),
+    PF("pf"),
+    PHP("php"),
+    PARSER3("parser3"),
+    PERL("perl"),
+    PONY("pony"),
+    POWER_SHELL("ps"),
+    PROCESSING("processing"),
+    PROLOG("prolog"),
+    PROTOCOL_BUFFERS("protobuf"),
+    PUPPET("pp"),
+    PYTHON("python"),
+    PYTHON_PROFILER_RESULTS("profile"),
+    Q("k"),
+    QML("qml"),
+    R("r"),
+    RENDER_MAN_RIB("rib"),
+    RENDER_MAN_RSL("rsl"),
+    ROBOCONF("roboconf"),
+    RUBY("ruby"),
+    RUST("rust"),
+    SCSS("scss"),
+    SQL("sql"),
+    STEP_PART_21("p21"),
+    SCALA("scala"),
+    SCHEME("scheme"),
+    SCILAB("sci"),
+    SMALI("smali"),
+    SMALLTALK("smalltalk"),
+    STAN("stan"),
+    STATA("stata"),
+    STYLUS("stylus"),
+    SUB_UNIT("subunit"),
+    SWIFT("swift"),
+    TEST_ANYTHING_PROTOCOL("tap"),
+    TCL("tcl"),
+    TEX("tex"),
+    THRIFT("thrift"),
+    TP("tp"),
+    TWIG("twig"),
+    TYPE_SCRIPT("typescript"),
+    VB_NET("vbnet"),
+    VB_SCRIPT("vbscript"),
+    VHDL("vhdl"),
+    VALA("vala"),
+    VERILOG("v"),
+    VIM("vim"),
+    X86_ASSEMBLY("x86asm"),
+    XL("xl"),
+    X_QUERY("xq"),
+    ZEPHIR("zep");
+
+    private final String className;
+
+    Language(String name) {
+        this.className = name;
+    }
+
+    public String getName() {
+        return className;
+    }
+
+}

app/src/main/java/org/mian/gitnex/helpers/highlightjs/models/Theme.java

@@ -0,0 +1,96 @@
+package org.mian.gitnex.helpers.highlightjs.models;
+
+/**
+ * This Class was created by Patrick J
+ * on 09.06.16.
+ */
+
+public enum Theme {
+    AGATE("agate"),
+    ANDROID_STUDIO("androidstudio"),
+    ARDUINO_LIGHT("arduino-light"),
+    ARTA("arta"),
+    ASCETIC("ascetic"),
+    ATELIER_CAVE_DARK("atelier-cave-dark"),
+    ATELIER_CAVE_LIGHT("atelier-cave-light"),
+    ATELIER_DUNE_DARK("atelier-dune-dark"),
+    ATELIER_DUNE_LIGHT("atelier-dune-light"),
+    ATELIER_ESTUARY_DARK("atelier-estuary-dark"),
+    ATELIER_ESTUARY_LIGHT("atelier-estuary-light"),
+    ATELIER_FOREST_DARK("atelier-forest-dark"),
+    ATELIER_FOREST_LIGHT("atelier-forest-light"),
+    ATELIER_HEATH_DARK("atelier-heath-dark"),
+    ATELIER_HEATH_LIGHT("atelier-heath-light"),
+    ATELIER_LAKESIDE_DARK("atelier-lakeside-dark"),
+    ATELIER_LAKESIDE_LIGHT("atelier-lakeside-light"),
+    ATELIER_PLATEAU_DARK("atelier-plateau-dark"),
+    ATELIER_PLATEAU_LIGHT("atelier-plateau-light"),
+    ATELIER_SAVANNA_DARK("atelier-savanna-dark"),
+    ATELIER_SAVANNA_LIGHT("atelier-savanna-light"),
+    ATELIER_SEASIDE_DARK("atelier-seaside-dark"),
+    ATELIER_SEASIDE_LIGHT("atelier-seaside-light"),
+    ATELIER_SULPHURPOOL_DARK("atelier-sulphurpool-dark"),
+    ATELIER_SULPHURPOOL_LIGHT("atelier-sulphurpool-light"),
+    ATOM_ONE_DARK("atom-one-dark"),
+    ATOM_ONE_LIGHT("atom-one-light"),
+    BROWN_PAPER("brown-paper"),
+    CODEPEN_EMBED("codepen-embed"),
+    COLOR_BREWER("color-brewer"),
+    DARK("dark"),
+    DARKULA("darkula"),
+    DEFAULT("default"),
+    DOCCO("docco"),
+    DRAKULA("drakula"),
+    FAR("far"),
+    FOUNDATION("foundaiton"),
+    GITHUB("github"),
+    GITHUB_GIST("github-gist"),
+    GOOGLECODE("googlecode"),
+    GRAYSCALE("grayscale"),
+    GRUVBOX_DARK("gruvbox-dark"),
+    GRUVBOX_LIGHT("gruvbox-light"),
+    HOPSCOTCH("hopscotch"),
+    HYBRID("hybrid"),
+    IDEA("idea"),
+    IR_BLACK("ir-black"),
+    KIMBIE_DARK("kimbie.dark"),
+    KIMBIE_LIGHT("kimbie.light"),
+    MAGULA("magula"),
+    MONO_BLUE("mono-blue"),
+    MONOKAI("monokai"),
+    MONOKAI_SUBLIME("monokai-sublime"),
+    OBSIDIAN("obsidian"),
+    OCEAN("ocean"),
+    PARAISO_DARK("paraiso-dark"),
+    PARAISO_LIGHT("paraiso-light"),
+    POJOAQUE("pojoaque"),
+    PURE_BASIC("purebasic"),
+    QT_CREATOR_DARK("qtcreator_dark"),
+    QT_CREATOR_LIGHT("qtcreator_light"),
+    RAILSCASTS("railscasts"),
+    RAINBOX("rainbow"),
+    SCHOOL_BOOK("school-book"),
+    SOLARIZED_DARK("solarized-dark"),
+    SOLARIZED_LIGHT("solarized-light"),
+    SUNBURST("sunburst"),
+    TOMORROW("tomorrow"),
+    TOMORROW_NIGHT_BLUE("tomorrow-night-blue"),
+    TOMORROW_NIGHT_BRIGHT("tomorrow-night-bright"),
+    TOMORROW_NIGHT("tomorrow-night"),
+    TOMORROW_NIGHT_EIGHTIES("tomorrow-night-eighties"),
+    VS("vs"),
+    X_CODE("xcode"),
+    XT256("xt256"),
+    ZENBURN("zenburn");
+
+    private final String themeName;
+
+    Theme(String themeName) {
+        this.themeName = themeName;
+    }
+
+    public String getName() {
+        return themeName;
+    }
+
+}

app/src/main/java/org/mian/gitnex/helpers/highlightjs/utils/SourceUtils.java

@@ -0,0 +1,98 @@
+package org.mian.gitnex.helpers.highlightjs.utils;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import org.mian.gitnex.helpers.highlightjs.HighlightJsView;
+
+/**
+ * This Class was created by Patrick J
+ * on 09.06.16. (modified by opyale)
+ */
+
+public class SourceUtils {
+
+	public static String generateContent(String source, @NonNull String theme, @Nullable String language, boolean supportZoom, boolean showLineNumbers,
+	                                     HighlightJsView.TextWrap textWrap) {
+
+		return getStylePageHeader(supportZoom, textWrap) +
+				getSourceForTheme(theme) +
+				(showLineNumbers ? getLineNumberStyling() : "") +
+				getScriptPageHeader(showLineNumbers) +
+				getSourceForLanguage(source, language) +
+				getTemplateFooter();
+	}
+
+	private static String getStylePageHeader(boolean enableZoom, HighlightJsView.TextWrap textWrap) {
+
+		String preTag;
+
+		switch (textWrap) {
+
+			case WORD_WRAP:
+				preTag = "pre { white-space: pre-wrap; word-wrap: break-word; }";
+				break;
+
+			case BREAK_ALL:
+				preTag = "pre { white-space: pre-wrap; word-break: break-all; }";
+				break;
+
+			default:
+				preTag = "pre { }";
+				break;
+
+		}
+
+		return "<!DOCTYPE html>" +
+				"<html>" +
+				"<head>" +
+				"<meta charset=\"utf-8\">" +
+				(enableZoom ? "" : "<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0, maximum-scale=1.0\">") +
+				"<style>" +
+				"html, body { width:100%; height: 100%; margin: 0px; padding: 0px; }" +
+				preTag +
+				"</style>";
+	}
+
+	private static String getScriptPageHeader(boolean showLineNumbers) {
+
+		return "<script src=\"./highlightjs/highlight.pack.js\"></script>" +
+				(showLineNumbers ? "<script src=\"./highlightjs/highlightjs-line-numbers.min.js\"></script>" : "") +
+				"<script>hljs.initHighlightingOnLoad();</script>" +
+				(showLineNumbers ? "<script>hljs.initLineNumbersOnLoad();</script>" : "") +
+				"</head><body style=\"margin: 0; padding: 0\" class=\"hljs\">";
+	}
+
+	private static String getLineNumberStyling() {
+
+		return "<style>" +
+				".hljs-line-numbers { text-align: right; border-right: 1px solid #ccc; color: #999; user-select: none; }" +
+				"</style>";
+	}
+
+	private static String getTemplateFooter() {
+
+		return "</body></html>";
+	}
+
+	private static String escapeCode(String code) {
+
+		return code.replaceAll("<", "&lt;")
+				.replaceAll(">", "&gt;");
+	}
+
+	private static String getSourceForTheme(String theme) {
+
+		return String.format("<link rel=\"stylesheet\" href=\"./highlightjs/themes/%s.css\">", theme);
+	}
+
+	private static String getSourceForLanguage(String source, String language) {
+
+		if (language != null) {
+			return String.format("<pre><code class=\"%s\">%s</code></pre>", language, escapeCode(source));
+		} else {
+			return String.format("<pre><code>%s</code></pre>", escapeCode(source));
+		}
+
+	}
+
+}

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

@@ -89,7 +89,7 @@
 
     </LinearLayout>
 
-    <com.pddstudio.highlightjs.HighlightJsView
+    <org.mian.gitnex.helpers.highlightjs.HighlightJsView
         android:id="@+id/singleCodeContents"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"