adding packages

deprecated/flutter_multi_window/lib/src/new_window/new_window.dart

@@ -0,0 +1,2 @@
+export 'unsupported.dart'
+    if (dart.library.html) 'web.dart';

deprecated/flutter_multi_window/lib/src/new_window/unsupported.dart

@@ -0,0 +1,10 @@
+void newWindow(
+  String url,
+  double width,
+  double height, {
+  String name = '',
+  double dx,
+  double dy,
+}) {
+  throw UnsupportedError('newWindow Not Supported');
+}

deprecated/flutter_multi_window/lib/src/new_window/web.dart

@@ -0,0 +1,37 @@
+import 'dart:html' as html;
+
+void newWindow(
+  String url,
+  double width,
+  double height, {
+  String name = '',
+  double dx,
+  double dy,
+}) {
+  final screen = html.window.screen;
+  double top = 0;
+  if (dy != null) {
+    top = dy;
+  } else if (screen.height != null) {
+    top = (screen.height - height) / 2;
+  }
+  double left = 0;
+  if (dx != null) {
+    left = dx;
+  } else if (screen.width != null) {
+    left = (screen.width - width) / 2;
+  }
+  final sb = StringBuffer();
+  sb.write("height=");
+  sb.write(height);
+  sb.write(",width=");
+  sb.write(width);
+  sb.write(",top=");
+  sb.write(top);
+  sb.write(",left=");
+  sb.write(left);
+  sb.write(",scrollbars=yes,resizable=yes,toolbar=no,status=no,menu=no,");
+  sb.write("directories=no,titlebar=no,location=no,addressbar=no");
+  final settings = sb.toString();
+  html.window.open(url, name, settings);
+}

deprecated/flutter_multi_window/lib/src/window.dart

@@ -0,0 +1,121 @@
+import 'dart:convert';
+
+import 'package:flutter/material.dart';
+
+import 'new_window/new_window.dart';
+
+class NewWindow {
+  String url;
+  double width;
+  double height;
+  double offsetX;
+  double offsetY;
+  String name;
+
+  NewWindow({
+    @required this.url,
+    @required this.width,
+    @required this.height,
+    this.offsetX,
+    this.offsetY,
+    this.name = '',
+  });
+
+  NewWindow.fromRect({
+    @required this.url,
+    @required Rect rect,
+    this.name = '',
+  })  : this.offsetX = rect.left,
+        this.offsetY = rect.top,
+        width = rect.width,
+        height = rect.height;
+
+  void create() => createWindow(this);
+  Offset get offset => Offset(this.offsetX, this.offsetY);
+  Size get size => Size(this.width, this.height);
+
+  NewWindow copyWith({
+    String url,
+    double width,
+    double height,
+    double offsetX,
+    double offsetY,
+    String name,
+  }) {
+    return NewWindow(
+      url: url ?? this.url,
+      width: width ?? this.width,
+      height: height ?? this.height,
+      offsetX: offsetX ?? this.offsetX,
+      offsetY: offsetY ?? this.offsetY,
+      name: name ?? this.name,
+    );
+  }
+
+  Map<String, dynamic> toMap() {
+    return {
+      'url': url,
+      'width': width,
+      'height': height,
+      'offsetX': offsetX,
+      'offsetY': offsetY,
+      'name': name,
+    };
+  }
+
+  static NewWindow fromMap(Map<String, dynamic> map) {
+    if (map == null) return null;
+
+    return NewWindow(
+      url: map['url'],
+      width: map['width'],
+      height: map['height'],
+      offsetX: map['offsetX'],
+      offsetY: map['offsetY'],
+      name: map['name'],
+    );
+  }
+
+  String toJson() => json.encode(toMap());
+
+  static NewWindow fromJson(String source) => fromMap(json.decode(source));
+
+  @override
+  String toString() {
+    return 'NewWindow(url: $url, width: $width, height: $height, offsetX: $offsetX, offsetY: $offsetY, name: $name)';
+  }
+
+  @override
+  bool operator ==(Object o) {
+    if (identical(this, o)) return true;
+
+    return o is NewWindow &&
+        o.url == url &&
+        o.width == width &&
+        o.height == height &&
+        o.offsetX == offsetX &&
+        o.offsetY == offsetY &&
+        o.name == name;
+  }
+
+  @override
+  int get hashCode {
+    return url.hashCode ^
+        width.hashCode ^
+        height.hashCode ^
+        offsetX.hashCode ^
+        offsetY.hashCode ^
+        name.hashCode;
+  }
+}
+
+void createWindow(NewWindow window) {
+  return newWindow(
+    window.url,
+    window.width,
+    window.height,
+    dx: window?.offsetX,
+    dy: window?.offsetY,
+    name: window?.name,
+  );
+}