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Navigation: Try fixing link color in some TT2 contexts. #44578

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merged 3 commits into from
Oct 3, 2022

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jasmussen
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@jasmussen jasmussen commented Sep 29, 2022

What?

Alternative to #44409. Fixes an issue where submenus in TT2 would be white on a white background.

I'm seeing this issue both for custom menus, and for page list menus, and in both the editor and the frontend. Steps to reproduce on #44409.

It isn't entirely clear to me what sets the color to white in TT2, but it is set with somewhat high specificity, so this PR needs to boost it further. It's important to test this one with all configurations of navigation colors, with and without backgrounds, with and without submenu colors.

Before:

Screenshot 2022-09-29 at 15 43 51

After:

Screenshot 2022-09-29 at 15 39 40

Screenshot 2022-09-29 at 15 39 48

Also fixes #20017, where a link color defined in global styles can override an explicitly set color on the navigation block. Before:

before

After:

after

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Size Change: +24 B (0%)

Total Size: 1.27 MB

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compressed-size-action

@carolinan
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carolinan commented Sep 29, 2022

The white text color and link color is set on the group block inside the outer header:
image

I do not see the text color issue on the front for the submenu block, only for page list.

@carolinan
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carolinan commented Sep 30, 2022

Test results:

Submenu block:

Both background and text color works in the editor and front. I tested both headers in TT2: the homepage and the inner pages.
-Nested submenus (multiple levels)
-Overlay
-With palette colors and with custom colors on the submenu
-With palette colors and custom colors on the navigation block

Page list with submenus:

Tested with two levels of "child pages".

Editor:
Without making any color changes, the submenus in the header in TT2 is black text on white background, so the text is visible. This is an improvement.

With submenu and overlay text color from the palette:
The colors are black text on white background, so the selected color is not visible.

With submenu and overlay background color from the palette:
The colors are black text on white background, so the selected color is not visible.

With submenu and overlay text color that is user selected, with the color picker:
The colors are black text on white background, so the selected color is not visible.

With submenu and overlay background color that is user selected, with the color picker:
The colors are black text on white background, so the selected color is not visible.

Note, the page list currently does not fetch the custom overlay colors from the context of the parent navigation block,
see #44310

With background color on the navigation block, but not the submenu:
The background of the submenu is transparent, so the content overlaps.

In this image, the page list is the "sample page" after the search block, and when expanded,
the submenu items overlap the search form and also the remaining menu items that are after the page list:

Screen Shot 2022-09-30 at 03 35 44

It may be easier to see if I move the page list to the first position in the menu:
Screen Shot 2022-09-30 at 03 39 55

With background and text color on the navigation block, but no color on the the submenu:
The submenus use the text color and the background color from the navigation block correctly.
So in this case, with both text and background color, the background on the submenu is not transparent.

Without background, but text color on the navigation block, and no color on the submenu:
The submenus have black text on white background: This is different from the submenu block,
where the text color from the navigation block is visible.

Pagelist:
Screen Shot 2022-09-30 at 03 45 24

Submenu block:
Screen Shot 2022-09-30 at 03 46 05

@jasmussen
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Thank you for the extensive and thorough testing 🙏 !

It's been a little bit since I was deep into navigation, submenus, and page list, so outstanding issues and bugs separate from the TT2 issue aren't top of mind. Would you say this is an improvement over trunk, or does it need further work?

@carolinan
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If you tell me

It's important to test this one with all configurations of navigation colors, with and without backgrounds, with and without submenu colors.

Then I will take you literally :)
If you write "Check if the text color is still white". Then I will also take you literally :)

With the exception of the page list user-selected colors from the color picker, these issues were unknown to me on trunk, but found here. So someone needs to do a full test on trunk and determine if this is an improvement or not.

@carolinan
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carolinan commented Oct 1, 2022

I still don't see the white text on white background on the front, note that I am testing with the 6.1 beta. It is not clear to me why the change needs to be in style.scss and not in the editor style only.
Perhaps I misunderstood what you meant with "I am seeing the issue on the front".

@jasmussen
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Picking this one up again. And happy to note that this PR also fixes #20017.

@jasmussen
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Thank you for all the thorough testing Carolina! As a result, I know more about what's going on here. There are a few things at play.

First off: navigation items links (a) inherit the text color from their parent (li) which inherit their items from their parent (the navigation block). This allows you to set a single text color on the navigation block itself, here:

Screenshot 2022-10-03 at 12 52 53

That way, all children inherit it, so you don't have to change the color for every one of them.

Secondly, global styles allows you to define a general link color, which should then (unless otherwise defined) be inherited everywhere. This has high specificity due to some :not rules.

Thirdly, a containing group can have link colors defined, which should then be inherited inside, unless otherwise specified. This is the TT2 issue, where a black-background group with white text causes white text inside the submenus.

None of this work correctly in trunk. Shown in this GIF, a navigation block with background and text colors defined, still inheriting the wrong color from the parent group, but only in the editor:

issues, trunk

This branch fixes all of these. Showing how navigation text color affects the navigation menu items inside, unless the text color of the parent group is set, which then overrides it both in editor and frontend:

after
inherit text

That is the main reason for the presence of the code in style.scss, so that menu items are correctly and consistently inheritin the text color of the parent (important, because nav items are not always a links, there are also chevron icons, and in click-only mode they are buttons), whether set on the navigation block, in global styles, or in a parent group. If it was in editor.scss, the parent group would not be inherited, but more importantly, the code would be likely to drift because specificity wasn't kept in sync.

I don't know a batter fix than this, to be honest. What do you think?

@carolinan
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I think we should merge it :)

@jasmussen
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Cool, I'll land this after the checks pass, but I'll keep an eye out for any followups that might happen. Worst case, we can revert! Thank you.

@jasmussen jasmussen merged commit af5802a into trunk Oct 3, 2022
@jasmussen jasmussen deleted the try/navigation-color-fix branch October 3, 2022 12:13
@github-actions github-actions bot added this to the Gutenberg 14.3 milestone Oct 3, 2022
@getdave
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getdave commented Oct 5, 2022

An interesting aside to this is that ultimately we need to migrate the Nav block to use the standards-based block supports for colors.

When we do that we'll need to reduce the specificity of the selector introduced here to ensure link styles outputted by Global Styles are more specific than inherited text styles.

@carolinan
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@jasmussen Unfortunately it seems that this problem has resurfaced https://core.trac.wordpress.org/ticket/57113

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Navigation: color consistence between front-end and editor-canvas
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