Fix clipboard image pasting

[Maksim-Nikolaev]

Description

Fix clipboard image pasting by checking if "onImagePaste" and/or "onGifPaste" handlers are provided in the clipboardConfig before handling the plainText (since it is not null if image/gif is present).

Related Issues

• Fix Clipboard image pasting not working correctly due to plainText check before #2383
• Fix Image pastes as plain text with unusual string on Android when copied from Samsung Gallery #2323

Type of Change

• ✨ Feature: New functionality without breaking existing features.
• 🛠️ Bug fix: Resolves an issue without altering current behavior.
• 🧹 Refactor: Code reorganization, no behavior change.
• ❌ Breaking: Alters existing functionality and requires updates.
• 🧪 Tests: New or modified tests
• 📝 Documentation: Updates or additions to documentation.
• 🗑️ Chore: Routine tasks, or maintenance.
• ✅ Build configuration change: Build/configuration changes.

Video demonstration:

Behavior before:

broken.mp4

Behavior after:

fixed.mp4

[EchoEllet]

Thanks for the contribution. I will review it soon, though this PR fix #2323 too.

[Maksim-Nikolaev]

Thanks for the contribution. I will review it soon, though this PR fix #2323 too.

Thanks. I edited the message to include Issue #2323

Let me know if you have any questions or need help testing.

[EchoEllet]

The issue is related to the Flutter Clipboard service retrieving plain text (more details in #2323). It does not occur using super_clipboard. The plugin quill_native_bridge doesn't provide getClipboardText though it's possible to.

I previously avoided this change:

• The image clipboard paste was within the QuillRawEditorState and the plain text was in QuillController (before feat!: release version 11.0.0 with breaking changes #2338).
• To avoid regressions, since this is not tested and it's possible by only updating quill_native_bridge to provide getClipboardText and then replace Clipboard.getData(Clipboard.kTextPlain).

I will merge as I don't plan on adding more feature to quill_native_bridge for now.

[EchoEllet]

## [Unreleased]

+ ### Fixed
+
+ - Fixed a bug where clipboard images were pasted as plain text on Android [#2384](https://github.com/singerdmx/flutter-quill/pull/2384).