[flutter_html_iframe] Fix compile error in Flutter 3.32.0

- correct conditional imports: use dart.library.js_interop instead of dart.library.html
- remove ui_fake classes, it is legacy implementation and should be replaced by web_ui package

This was kinda fixed in a PR
Sub6Resources#1485

Author: chillbrodev

.fvmrc

@@ -0,0 +1,3 @@
+{
+  "flutter": "3.32.6"
+}

.gitignore

@@ -156,4 +156,7 @@ packages/**/pubspec_overrides.yaml
 ./pubspec_overrides.yaml
 /example/pubspec_overrides.yaml
 
-coverage/
+coverage/
+
+# FVM Version Cache
+.fvm/

example/ios/Flutter/ephemeral/flutter_lldb_helper.py

@@ -0,0 +1,32 @@
+#
+# Generated file, do not edit.
+#
+
+import lldb
+
+def handle_new_rx_page(frame: lldb.SBFrame, bp_loc, extra_args, intern_dict):
+    """Intercept NOTIFY_DEBUGGER_ABOUT_RX_PAGES and touch the pages."""
+    base = frame.register["x0"].GetValueAsAddress()
+    page_len = frame.register["x1"].GetValueAsUnsigned()
+
+    # Note: NOTIFY_DEBUGGER_ABOUT_RX_PAGES will check contents of the
+    # first page to see if handled it correctly. This makes diagnosing
+    # misconfiguration (e.g. missing breakpoint) easier.
+    data = bytearray(page_len)
+    data[0:8] = b'IHELPED!'
+
+    error = lldb.SBError()
+    frame.GetThread().GetProcess().WriteMemory(base, data, error)
+    if not error.Success():
+        print(f'Failed to write into {base}[+{page_len}]', error)
+        return
+
+def __lldb_init_module(debugger: lldb.SBDebugger, _):
+    target = debugger.GetDummyTarget()
+    # Caveat: must use BreakpointCreateByRegEx here and not
+    # BreakpointCreateByName. For some reasons callback function does not
+    # get carried over from dummy target for the later.
+    bp = target.BreakpointCreateByRegex("^NOTIFY_DEBUGGER_ABOUT_RX_PAGES$")
+    bp.SetScriptCallbackFunction('{}.handle_new_rx_page'.format(__name__))
+    bp.SetAutoContinue(True)
+    print("-- LLDB integration loaded --")

example/ios/Flutter/ephemeral/flutter_lldbinit

@@ -0,0 +1,5 @@
+#
+# Generated file, do not edit.
+#
+
+command script import --relative-to-command-file flutter_lldb_helper.py

example/macos/Flutter/GeneratedPluginRegistrant.swift

@@ -5,8 +5,6 @@
 import FlutterMacOS
 import Foundation
 
-import wakelock_macos
 
 func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
-  WakelockMacosPlugin.register(with: registry.registrar(forPlugin: "WakelockMacosPlugin"))
 }

lib/src/css_parser.dart

@@ -671,10 +671,8 @@ Style? inlineCssToStyle(String? inlineStyle, OnCssParseError? errorHandler) {
     return declarationsToStyle(declarations["*"]!);
   } else if (errorHandler != null) {
     String? newCss = errorHandler.call(inlineStyle ?? "", errors);
-    if (newCss != null) {
-      return inlineCssToStyle(newCss, errorHandler);
+    return inlineCssToStyle(newCss, errorHandler);
     }
-  }
   return null;
 }
 
@@ -689,10 +687,8 @@ Map<String, Map<String, List<css.Expression>>> parseExternalCss(
     return DeclarationVisitor().getDeclarations(sheet);
   } else if (errorHandler != null) {
     String? newCss = errorHandler.call(css, errors);
-    if (newCss != null) {
-      return parseExternalCss(newCss, errorHandler);
+    return parseExternalCss(newCss, errorHandler);
     }
-  }
   return {};
 }
 

lib/src/style.dart

@@ -561,21 +561,17 @@ class Style {
 extension _MarginRelativeValues on Margin {
   Margin? getRelativeValue(double remValue, double emValue) {
     double? calculatedValue = calculateRelativeValue(remValue, emValue);
-    if (calculatedValue != null) {
-      return Margin(calculatedValue);
-    }
-
+    return Margin(calculatedValue);
+  
     return null;
   }
 }
 
 extension _PaddingRelativeValues on HtmlPadding {
   HtmlPadding? getRelativeValue(double remValue, double emValue) {
     double? calculatedValue = calculateRelativeValue(remValue, emValue);
-    if (calculatedValue != null) {
-      return HtmlPadding(calculatedValue);
-    }
-
+    return HtmlPadding(calculatedValue);
+  
     return null;
   }
 }

packages/flutter_html_iframe/lib/flutter_html_iframe.dart

@@ -6,7 +6,7 @@ import 'package:webview_flutter/webview_flutter.dart';
 
 import 'iframe_unsupported.dart'
     if (dart.library.io) 'iframe_mobile.dart'
-    if (dart.library.html) 'iframe_web.dart';
+    if (dart.library.js_interop) 'iframe_web.dart';
 
 class IframeHtmlExtension extends HtmlExtension {
   final NavigationDelegate? navigationDelegate;

packages/flutter_html_iframe/lib/iframe_web.dart

@@ -1,11 +1,11 @@
 import 'dart:convert';
 import 'dart:math';
+import 'package:web/web.dart' as web;
+import 'dart:ui_web' as ui_web;
 
 import 'package:flutter/material.dart';
 import 'package:flutter_html/flutter_html.dart';
-import 'package:flutter_html_iframe/shims/dart_ui.dart' as ui;
 // ignore: avoid_web_libraries_in_flutter
-import 'dart:html' as html;
 
 import 'package:webview_flutter/webview_flutter.dart';
 
@@ -25,13 +25,13 @@ class IframeWidget extends StatelessWidget {
         double.tryParse(extensionContext.attributes['width'] ?? "");
     final givenHeight =
         double.tryParse(extensionContext.attributes['height'] ?? "");
-    final html.IFrameElement iframe = html.IFrameElement()
+    final web.HTMLIFrameElement iframe = web.HTMLIFrameElement()
       ..width = (givenWidth ?? (givenHeight ?? 150) * 2).toString()
       ..height = (givenHeight ?? (givenWidth ?? 300) / 2).toString()
-      ..src = extensionContext.attributes['src']
+      ..src = extensionContext.attributes['src'] ?? ''
       ..style.border = 'none';
     final String createdViewId = _getRandString(10);
-    ui.platformViewRegistry
+    ui_web.platformViewRegistry
         .registerViewFactory(createdViewId, (int viewId) => iframe);
     return SizedBox(
       width: double.tryParse(extensionContext.attributes['width'] ?? "") ??