feat: `WebView` enhancements

[ndonkoHenri]

Summary by Sourcery

Enhance the WebView component with new event handling and method support, refactor platform detection logic, and update dependencies for improved platform-specific functionality.

New Features:

• Introduce new event handling capabilities for the WebView component, including scroll, console message, and JavaScript alert dialog events.
• Add support for various WebView methods such as reload, go back, go forward, enable/disable zoom, clear cache, and run JavaScript.
• Implement platform-specific WebView support for mobile, macOS, web, Windows, and Linux platforms.

Enhancements:

• Deprecate the 'javascript_enabled' property in favor of 'enable_javascript' in the WebView component.
• Refactor platform detection logic by introducing a new 'platform.dart' utility for better platform-specific checks.

Build:

• Update dependencies in the pubspec.yaml file, including upgrading 'webview_flutter' and adding new dependencies like 'webview_flutter_web' and 'webview_flutter_platform_interface'.

[sourcery-ai[bot]]

Reviewer's Guide by Sourcery

This pull request introduces significant enhancements to the WebView component in the Flet framework, improving its functionality across different platforms (mobile, web, and desktop). The changes include new features, better platform support, and code refactoring for improved maintainability.

File-Level Changes

Change	Details	Files
Enhanced WebView functionality with new methods and events	Added new methods like reload(), can_go_back(), can_go_forward(), go_back(), go_forward() Implemented new events such as on_progress, on_url_change, on_scroll, on_console_message Added support for JavaScript execution and HTML loading Implemented methods for cache and local storage clearing	sdk/python/packages/flet-core/src/flet_core/webview.py
Improved cross-platform support for WebView	Created separate implementations for mobile/macOS, web, and Windows/Linux platforms Implemented platform-specific checks to use appropriate WebView implementation Added new utility functions for platform detection	packages/flet_webview/lib/src/webview_mobile_and_mac.dart packages/flet_webview/lib/src/webview_web.dart packages/flet_webview/lib/src/webview_windows_and_linux.dart packages/flet/lib/src/utils/platform.dart
Refactored existing code for better maintainability	Moved platform-specific utility functions from desktop.dart to platform.dart Updated import statements across multiple files to use the new platform.dart Refactored WebView control to use the new platform-specific implementations	packages/flet/lib/src/utils/desktop.dart packages/flet/lib/src/controls/webview.dart packages/flet/lib/src/controls/page.dart packages/flet/lib/src/controls/grid_view.dart packages/flet/lib/src/controls/list_view.dart packages/flet/lib/src/controls/scrollable_control.dart
Updated dependencies and configurations	Added new WebView-related dependencies in pubspec.yaml Updated iOS and macOS configurations for WebView support	packages/flet_webview/pubspec.yaml client/ios/Runner/AppDelegate.swift client/macos/Flutter/GeneratedPluginRegistrant.swift

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[Muddassir-Farooq-official]

Kindly merge and one more thing add permission in manifest for Android to display local html files in web view

[Muddassir-Farooq-official]

Summary by Sourcery

Enhance the WebView component with new event handling and method support, refactor platform detection logic, and update dependencies for improved platform-specific functionality.

New Features:

• Introduce new event handling capabilities for the WebView component, including scroll, console message, and JavaScript alert dialog events.
• Add support for various WebView methods such as reload, go back, go forward, enable/disable zoom, clear cache, and run JavaScript.
• Implement platform-specific WebView support for mobile, macOS, web, Windows, and Linux platforms.

Enhancements:

• Deprecate the 'javascript_enabled' property in favor of 'enable_javascript' in the WebView component.
• Refactor platform detection logic by introducing a new 'platform.dart' utility for better platform-specific checks.

Build:

• Update dependencies in the pubspec.yaml file, including upgrading 'webview_flutter' and adding new dependencies like 'webview_flutter_web' and 'webview_flutter_platform_interface'.

Any update???

[Muddassir-Farooq-official]

Any update?

[kalatawei]

Is there any chance for supporting WebView CookieManager ?

[cayubweeums]

This looks great! Can't wait to implement this in my project once it gets merged to main!!

[ndonkoHenri]

@sourcery-ai review

[Muddassir-Farooq-official]

Is it merged and working on desktop??

[Muddassir-Farooq-official]

Have documentation updated in flet docs?

[ndonkoHenri]

Working on it.

[Benitmulindwa]

Good stuff @ndonkoHenri 😎! But i have some questions, are we going to get the run_javascripts() methods support on other platforms soon? I thought this PR would add WV support for the windows,

[ndonkoHenri]

Windows and Linux are not yet supported. Will have a look at them after we release 0.25.0.

[Benitmulindwa]

Would be great to have the run_javascripts() method on Web too

Edit: Am not able to update the url value when running on web. Is it a bug or that’s how it’s supposed to be?

[Benitmulindwa]

Am able to change the url value outside of a function,… but once am inside a function/eventhandler an error is shown saying that the method is supported on Android, iOS and macOS only.

[ndonkoHenri]

@Benitmulindwa let's continue this in a new discussion. Can you create one and explain the issues you face?

[Benitmulindwa]

@ndonkoHenri all right lemme do it

[Benitmulindwa]

#4356

[pychans]

On Windows, an error is reported: Webview is not yet supported on this Platform.

[ndonkoHenri]

Windows and Linux support is still to be added.

[lgs888]

@ndonkoHenri Hello, I attempted to run WebView on the Android platform, but found that it couldn't execute JavaScript. This issue doesn't exist on the web platform. Could you please tell me what might be the reason for this? flet==0.27.6 flet-webview==0.1.0 python==3.12 Android version 12

[Muddassir-Farooq-official]

Kindly implemented refresh or reload method in flet also for reloading current screen