No longer able to disable custom font and color styles

[philbuchanan]

In earlier version of Gutenberg, a developer was able to disable/remove custom font sizes and colors using a few lines of code:

// Disable Gutenberg custom font sizes
add_theme_support('disable-custom-font-sizes');
add_theme_support('editor-font-sizes', array());

// Disable Gutenberg custom colors
add_theme_support('disable-custom-colors');
add_theme_support('editor-color-palette', array());

In recent versions (I'm not 100% sure which version) these settings no longer work. #25756 mentioned the same issue but that was closed despite the issue still remaining.

Expected behaviour

I would expect these settings to continue to be honoured. The documentation even states that these settings should still be honoured.

To retain backward compatibility, the existing add_theme_support declarations that configure the block editor are retrofit in the proper categories for the top-level section. For example, if a theme uses add_theme_support('disable-custom-colors'), it’ll be the same as setting settings.color.custom to false.

Actual behaviour

Even with these settings disabled in functions.php they still show up as:

WordPress information

• WordPress version: 5.7.2
• Gutenberg version: 10.7.1
• Are all plugins except Gutenberg deactivated? Yes
• Are you using a default theme (e.g. Twenty Twenty-One)? No

Device information

• Device: Mac
• Operating system: macOS 11.4
• Browser: Safari 14.1.1

[skorasaurus]

Regarding the color palette, that should be fixed in this PR - #32225

[youknowriad]

cc @nosolosw @jorgefilipecosta

[oandregal]

This has been fixed in 10.8 as per #32200