Feature Request: UI: Change "default" font family

[henry2man]

Is your feature request related to a problem?

Yes, I want a simple way to change the default font family "Avenir". Currently this task involves the extension of a lot of text styles, even using DefaultChatTheme.

What solution would you suggest?

The ideal solution could be make dynamic DefaultChatTheme, allowing a new parameter called defaultFontFamily (original, isn't it?). Maybe we could configure some sort of a defaultTextStyle that is used later by the specific styles using defaultTextStyle.copyWith().

Is there any additional solution to that?

I've been trying to do my own implementation in a fork but I cannot see any "one-shot" solution. Maybe a full rewrite of chat_theme.dart will be required.

Extras

Screenshots or videos 📸
N/A

Code snippets 📝

Actual code needed for change all fonts:

DefaultFontFamily def = DefaultFontFamily();

String customFontFamily = 'Arial';

DefaultFontFamily(
...
dateDividerTextStyle: def.dateDividerTextStyle.copyWith(fontFamily:customFontFamily),
emptyChatPlaceholderTextStyle: def.emptyChatPlaceholderTextStyle.copyWith(fontFamily:customFontFamily),
inputTextStyle: def.inputTextStyle.copyWith(fontFamily:customFontFamily),
receivedMessageBodyTextStyle: def.receivedMessageBodyTextStyle.copyWith(fontFamily:customFontFamily),
receivedMessageCaptionTextStyle: def.receivedMessageCaptionTextStyle.copyWith(fontFamily:customFontFamily),
receivedMessageLinkDescriptionTextStyle: def.receivedMessageLinkDescriptionTextStyle.copyWith(fontFamily:customFontFamily),
receivedMessageLinkTitleTextStyle: def.receivedMessageLinkTitleTextStyle.copyWith(fontFamily:customFontFamily),
sentMessageBodyTextStyle: def.sentMessageBodyTextStyle.copyWith(fontFamily:customFontFamily),
sentMessageCaptionTextStyle: def.sentMessageCaptionTextStyle.copyWith(fontFamily:customFontFamily),
sentMessageLinkDescriptionTextStyle: def.sentMessageLinkDescriptionTextStyle.copyWith(fontFamily:customFontFamily),
sentMessageLinkTitleTextStyle: def.sentMessageLinkTitleTextStyle.copyWith(fontFamily:customFontFamily),
userAvatarTextStyle: def.userAvatarTextStyle.copyWith(fontFamily:customFontFamily),
userNameTextStyle: def.userNameTextStyle.copyWith(fontFamily:customFontFamily),
...
);

Related issues/PRs

N/A