Add offline support

.gitignore

@@ -61,6 +61,7 @@ build/
 **/ios/Flutter/flutter_assets/
 **/ios/ServiceDefinitions.json
 **/ios/Runner/GeneratedPluginRegistrant.*
+**/ios/**/flutter_export_environment.sh
 
 # Exceptions to above rules.
 !**/ios/**/default.mode1v3

example/android/gradle.properties

@@ -1 +1,2 @@
 org.gradle.jvmargs=-Xmx1536M
+android.enableR8=true

example/lib/main.dart

@@ -29,7 +29,8 @@ class MyHomePage extends StatefulWidget {
 
 class _MyHomePageState extends State<MyHomePage> {
   Color color = Colors.red;
-  UnDrawIllustration illustration = UnDrawIllustration.mobile_application;
+  String illustration = '3d_modeling';
+  String mode = 'offline';
 
   @override
   Widget build(BuildContext context) {
@@ -41,6 +42,7 @@ class _MyHomePageState extends State<MyHomePage> {
       body: UnDraw(
         color: color,
         illustration: illustration,
+        mode: mode,
         placeholder: Text("Illustration is loading..."),
         errorWidget: Icon(Icons.error_outline, color: Colors.red, size: 50),
       ),
@@ -64,8 +66,11 @@ class _MyHomePageState extends State<MyHomePage> {
               onPressed: () {
                 Random random = new Random();
                 setState(() {
+                  mode = 'online';
                   illustration = UnDrawIllustration
-                      .values[random.nextInt(UnDrawIllustration.values.length)];
+                      .values[random.nextInt(UnDrawIllustration.values.length)]
+                      .toString()
+                      .split('UnDrawIllustration.')[1];
                 });
               },
               backgroundColor: Colors.red,

example/pubspec.lock

@@ -1,20 +1,34 @@
 # Generated by pub
 # See https://dart.dev/tools/pub/glossary#lockfile
 packages:
+  archive:
+    dependency: transitive
+    description:
+      name: archive
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.11"
+  args:
+    dependency: transitive
+    description:
+      name: args
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.5.2"
   async:
     dependency: transitive
     description:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.2.0"
+    version: "2.4.0"
   boolean_selector:
     dependency: transitive
     description:
       name: boolean_selector
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.4"
+    version: "1.0.5"
   charcode:
     dependency: transitive
     description:
@@ -36,6 +50,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.1.1"
+  crypto:
+    dependency: transitive
+    description:
+      name: crypto
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.3"
   cupertino_icons:
     dependency: "direct main"
     description:
@@ -74,27 +95,34 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "3.1.3"
+  image:
+    dependency: transitive
+    description:
+      name: image
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.4"
   matcher:
     dependency: transitive
     description:
       name: matcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.5"
+    version: "0.12.6"
   meta:
     dependency: transitive
     description:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.6"
+    version: "1.1.8"
   path:
     dependency: transitive
     description:
       name: path
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.6.2"
+    version: "1.6.4"
   path_drawing:
     dependency: transitive
     description:
@@ -115,21 +143,21 @@ packages:
       name: pedantic
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.7.0"
+    version: "1.8.0+1"
   petitparser:
     dependency: transitive
     description:
       name: petitparser
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.2.1"
+    version: "2.4.0"
   quiver:
     dependency: transitive
     description:
       name: quiver
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.3"
+    version: "2.0.5"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -162,7 +190,7 @@ packages:
       name: string_scanner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.4"
+    version: "1.0.5"
   term_glyph:
     dependency: transitive
     description:
@@ -176,7 +204,7 @@ packages:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.5"
+    version: "0.2.11"
   typed_data:
     dependency: transitive
     description:
@@ -190,7 +218,7 @@ packages:
       path: ".."
       relative: true
     source: path
-    version: "1.0.1"
+    version: "1.0.2"
   vector_math:
     dependency: transitive
     description:
@@ -204,7 +232,7 @@ packages:
       name: xml
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.4.1"
+    version: "3.5.0"
 sdks:
-  dart: ">=2.2.2 <3.0.0"
+  dart: ">=2.4.0 <3.0.0"
   flutter: ">=1.5.9-pre.94 <2.0.0"

example/pubspec.yaml

@@ -43,8 +43,8 @@ flutter:
   uses-material-design: true
 
   # To add assets to your application, add an assets section, like this:
-  # assets:
-  #  - images/a_dot_burr.jpeg
+  assets:
+   - assets/
   #  - images/a_dot_ham.jpeg
 
   # An image asset can refer to one or more resolution-specific "variants", see

lib/undraw.dart

@@ -1,6 +1,7 @@
 library undraw;
 
 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
 import 'package:flutter_svg/flutter_svg.dart';
 import 'package:http/http.dart' as http;
 import 'package:undraw/illustrations.dart';
@@ -12,6 +13,7 @@ class UnDraw extends StatelessWidget {
     Key key,
     @required this.illustration,
     @required this.color,
+    this.mode,
     this.semanticLabel,
     this.alignment = Alignment.center,
     this.fit = BoxFit.contain,
@@ -24,8 +26,9 @@ class UnDraw extends StatelessWidget {
   })  : assert(illustration != null),
         assert(color != null);
 
-  final UnDrawIllustration illustration;
+  final String illustration;
   final Color color;
+  final String mode;
   final String semanticLabel;
   final AlignmentGeometry alignment;
   final BoxFit fit;
@@ -37,11 +40,23 @@ class UnDraw extends StatelessWidget {
   final EdgeInsets padding;
 
   Future<SvgPicture> renderIllustration(String name, Color _exColor) async {
-    var nameSplit = name.toString().split("UnDrawIllustration.");
-    var illustration =
-        illustrationList.where((i) => i["identifier"] == nameSplit[1]);
-    String url = illustration.toList()[0]["url"];
-    String image = await _getSvgString(url);
+    String image;
+    String url;
+    if (this.mode == 'offline') {
+      image = await rootBundle.loadString('assets/$name.svg');
+    } else {
+      if (name.toString().contains('UnDrawIllustration.')) {
+        var nameSplit = name.toString().split("UnDrawIllustration.");
+        var illustration =
+            illustrationList.where((i) => i["identifier"] == nameSplit[1]);
+        url = illustration.toList()[0]["url"];
+      } else {
+        var illustration =
+            illustrationList.where((i) => i["identifier"] == name);
+        url = illustration.toList()[0]["url"];
+      }
+      image = await _getSvgFromUrl(url);
+    }
 
     String valueString = color.toString().split('(0x')[1].split(')')[0];
     valueString = valueString.substring(2, valueString.length);
@@ -61,7 +76,7 @@ class UnDraw extends StatelessWidget {
   Widget build(BuildContext context) {
     return Container(
       child: FutureBuilder(
-        future: renderIllustration(illustration.toString(), color),
+        future: renderIllustration(illustration, color),
         builder: (BuildContext context, AsyncSnapshot snapshot) {
           if (snapshot.hasData) {
             return Container(
@@ -82,7 +97,7 @@ class UnDraw extends StatelessWidget {
     );
   }
 
-  Future<String> _getSvgString(url) async {
+  Future<String> _getSvgFromUrl(url) async {
     http.Response response = await http.get(url);
     return response.body;
   }