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Calendar: Add Border Support and Spacing Support - #64345
shail-mehta wants to merge 46 commits into
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shail-mehta
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[Type] Enhancement
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t-hamano
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Thanks for the PR!
My feeling is that, like with the Table block, border support should be reflected on the cells rather than the block itself.
Border support for the Table block works as follows:
e1789fcbbad75a414ef78ed6f107f1f7.mp4
This may require some complex modifications to achieve, but the source for the Table block should help.
aaronrobertshaw
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Thank you for working on this one @shail-mehta 👍
I'm wondering if the Calendar block might need a more nuanced approach to how it adopts border support.
If the block simply adopts border support and applies the styles to the block's wrapper, it might also need spacing support (at least padding).
The block currently uses the currentColor for the calendar's inner borders. As a user, I'd probably expect any border color selections I make to apply there.
Another question is whether the border should be around the header and navigation links or just the calendar's table. When the outer border is the same color as the inner borders and there is no padding between the calendar and the outer border, it looks like the border width is uneven due to the two borders coming together.
Given the varied questions, I think it would be great to get some design feedback here. I've taken the liberty of adding that label to this PR.
| "__experimentalDefaultControls": { | ||
| "radius": true, | ||
| "color": true, | ||
| "width": true, | ||
| "style": true | ||
| } |
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| "__experimentalDefaultControls": { | |
| "radius": true, | |
| "color": true, | |
| "width": true, | |
| "style": true | |
| } |
The current thinking on whether border controls should show by default is that they should be optional for niche cases.
The best indicator for displaying border controls by default is whether the dimension controls are also displayed by default. With no padding or margin support on this block, I'd say we should hide these controls by default.
| @@ -1,5 +1,7 @@ | |||
| .wp-block-calendar { | |||
| text-align: center; | |||
| // This block has customizable border-box makes that more predictable. | |||
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| // This block has customizable border-box makes that more predictable. | |
| // This block has customizable borders. Border-box sizing makes that more predictable. |
There's a typo in this comment. Perhaps it should read something like above?
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Thank you @t-hamano and @aaronrobertshaw for the Feedback. I will work on this PR and address the suggested changes. |
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Not that there is an ongoing effort to make the editor component markup consistent with the frontend, and once that refactoring is complete, it may be easier to tackle this PR: #60763 |
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I have Applied feedback changes.
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aaronrobertshaw
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Thanks for picking this back up @shail-mehta 👍
I have Applied feedback changes.
I'm not sure all the suggestions have been resolved. Some aspects were still open for discussion, e.g. border around the block or around the cells only. Could the block have a setting added allowing the border to be applied to the block wrapper or the cells?
Additionally, if the border is applied to the cells I don't think any user would expect the borders not to collapse.
The border around the empty placeholder cell before the start, or after the end, date of the month probably shouldn't happen too if the calendar doesn't have a outer border.
The last thought that comes to mind after a quick glance is the border radius application for calendar cells seems clunky. If there's a border and you make the border-collapse separate it just looks odd. I could see a use case though for border radius on the cells if the cells have a background color and spacing around them.
This comes back to my earlier thoughts that the adoption of borders here might also need some related efforts to add better support for spacing.
Curious to see what others, in particular those with design chops, think about this direction.
Agree with this suggestion - I'll defer to the design eagles, but personally I'd expect to be able to control the cell borders, which might mean we need to decouple text color somehow. Some blocks are just tricky this way 😄 |
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| }, | ||
| "__experimentalBorder": { | ||
| "radius": true, |
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Do users really need rounded corners for cells? Personally, I feel it's unnecessary, similar to the Table block.
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I would include to be consistent with how other block and containers can be styled
| const blockProps = useBlockProps( { ref: disabledRef } ); | ||
| const blockProps = useBlockProps( { | ||
| ref: disabledRef, | ||
| __experimentalSkipSerialization: true, |
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There is no such option for useBlockProps.
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Removed this unused change.
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| "style": "wp-block-calendar", | |
| "selectors": { | |
| "border": ".wp-block-calendar th, .wp-block-calendar td" | |
| } |
To apply the global styles to the cell, you will likely need a style like this.
| // This block has customizable borders. Border-box sizing makes that more predictable. | ||
| box-sizing: border-box; |
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It seems unnecessary if we want to apply borders to the cells.
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Removed the border box, as the border is applied to the table cells.
| // This block has customizable borders. Border-box sizing makes that more predictable. | ||
| box-sizing: border-box; | ||
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| border: none !important; |
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border: none !important; Removed this unintended change.
| &.has-background th { | ||
| background-color: inherit; | ||
| } | ||
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| &.has-text-color th { | ||
| color: inherit; | ||
| } | ||
| } | ||
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| :where(table:not(.has-text-color)) { | ||
| color: #40464d; | ||
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| // Keep the hard-coded border color for backward compatibility. | ||
| th, | ||
| td { | ||
| border-color: $gray-300; | ||
| } | ||
| } |
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I recall these styles were for backward compatibility. With the addition of border color support, these styles might no longer be necessary, but I recommend reviewing the PRs below.
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Removed the unused CSS and kept the default styles.
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I agree with the approach of following what the table block does. It would be strange to just control the container area and not the elements inside. It also feels odd not to have the same level of control as in the default state where day cells come with a backgroud and a border in the table area where both day character and number are.
I wonder what the systematic approach is for customizing elements that belong to a block. At first, this could conceptually be a group of blocks in a table with dynamic text on top and a link at the bottom to change the month. Ideally, everything needs to be customizable, but the main question is whether that happens at the block level or whether there is a way to select internal elements and customize each one. If this has been discussed before elsewhere, sorry for the lack of awareness, but to me, that is the core challenge that this issue surfaces. |
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@fcoveram thanks for bringing your expertise to this one 🙇 The problem here is the Calendar block is an old legacy block that even uses server side rendering. So backward compatibility becomes a major issue.
A lot of this points to a complete overhaul for the block. In the meantime, we probably need a middle ground for what styles can be supported via block supports and how they can be applied, imperfect as that application might be on the current version of the block. |
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Thank you all for the feedback. I'll update this PR. |
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Thank you for the feedback! All 8 points are addressed in the latest commits. Once you get a chance could you please take a another look? |
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The interaction in Editor and the frontend look good to me |
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Hi @shail-mehta, Thanks for the continued work here, it's appreciated. The PR description here no longer matches what this PR does. We'll need to update that appropriately. Some examples where it's out of sync are:
More importantly, while the recent changes fix a decent chunk of recent feedback, it fails to address the breaking changes this PR introduces. Solutions to these breakages will need to be found or this PR cannot progress as it stands. Background moved from the table to the wrapper. The calendar's nav links now sit on the background. That changes every existing site with a calendar background. This is a pretty obvious breaking visual change. Just following the testing instructions on trunk vs this branch and comparing the results shows this clearly.
Per-side borders apply to every cell.
Border styles are stamped on every cell. This one might be unavoidable if borders are on individual cells but it's worth keeping in mind. Roughly 4KB of duplicated inline CSS per calendar, and only overridable with blockGap.
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Thanks for the Feedback! I’ll work on it . |
🤖 PR meta 🤖📦 Bundle sizeSize Change: +4.64 kB (+0.06%) Total Size: 8.01 MB 📦 View Changed
⚡ PerformanceShow the resultsClient side metrics exclude the server response time. front-end-block-theme
front-end-classic-theme
media-processing
media-upload
post-editor
site-editor
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Hi @aaronrobertshaw, thanks again for the detailed review. I’ve pushed updates intended to address your August 31 feedback:
Could you take another look when you have a chance? I’m happy to adjust anything that still looks off. |
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Included review availability: Your plan provides up to 8 included reviews per hour; 6 remain after this review. 📝 WalkthroughWalkthroughThe Calendar block adds spacing and border support. Rendering applies color, border, link-color, and block-gap styles with structured HTML processing. CSS and PHPUnit coverage validate the generated selectors and rendered markup. ChangesCalendar styling support
Estimated code review effort: 4 (Complex) | ~45 minutes Merge Risk: ⚪ Minimal · up to Calendar blocks gain border and spacing styling while retaining legacy rendering behavior. No concrete current merge-readiness risk remains. Sequence Diagram(s)sequenceDiagram
participant CalendarRenderer
participant StyleEngine
participant WP_HTML_Tag_Processor
CalendarRenderer->>StyleEngine: Generate color, border, spacing CSS and classes
StyleEngine-->>CalendarRenderer: Return generated styles and classes
CalendarRenderer->>WP_HTML_Tag_Processor: Apply styles and classes to calendar table and caption
WP_HTML_Tag_Processor-->>CalendarRenderer: Return updated calendar markup
🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
✨ Finishing Touches 💡 1🛠️ Fix failing CI checks 💡
📝 Generate docstrings
🧪 Generate unit tests (beta)
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Inline comments:
In `@packages/block-library/src/calendar/index.php`:
- Line 236: Update block_core_calendar_normalize_gap_value() to reject values
containing a semicolon, returning the existing invalid-value result before
render_block_core_calendar() uses the normalized gap. Add a regression test
covering a value such as 1px;color:red and verify it is rejected without
affecting valid gap values.
In `@packages/block-library/src/calendar/style.scss`:
- Line 104: Update the table border selectors near table[style*="border-style"]
and the related width selectors to also match each side-specific border style
and width property. Apply the same per-side edge-cell propagation already used
for border colors, covering top, right, bottom, and left declarations while
preserving the existing generic selectors.
- Around line 54-68: Restrict the side-specific border selectors in
packages/block-library/src/calendar/style.scss:54-68 to actual top-edge cells,
excluding section boundaries; update
packages/block-library/src/calendar/style.scss:70-77 so the right color applies
only to each row’s last cell; update
packages/block-library/src/calendar/style.scss:79-93 so the bottom color applies
only to actual bottom-edge cells; update
packages/block-library/src/calendar/style.scss:95-102 so the left color applies
only to each row’s first cell, preventing colors on internal header/body and
header-cell separators.
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docs/reference-guides/core-blocks/README.mdpackages/block-library/CHANGELOG.mdpackages/block-library/src/calendar/README.mdpackages/block-library/src/calendar/block.jsonpackages/block-library/src/calendar/index.phppackages/block-library/src/calendar/style.scssphpunit/blocks/render-block-calendar-test.phpphpunit/class-wp-theme-json-test.php
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aaronrobertshaw
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Appreciate the continue efforts here 👍
It might help if after each round of changes you could self review (including using agents if possible) to assess the PR changes for backward compatibility.
I believe there is a regression with the removal of:
.wp-block-calendar :where(table:not(.has-text-color)) th,
.wp-block-calendar :where(table:not(.has-text-color)) td { border-color: #ddd; }The default border-color: $gray-300 on cells has been dropped, so calendar borders now fall back to currentColor and every existing calendar changes from #ddd to #40464d. Restoring it needs the element inside :where() so Global Styles still wins, plus splitting the border: $border-width solid shorthand into border-width and border-style so it stops resetting the colour and overriding the restored rule.
Optional follow-up if the code helps, you'd also need to split the rest of the previous shorthand rule too:
.wp-block-calendar :where(table:not(.has-text-color) th),
.wp-block-calendar :where(table:not(.has-text-color) td) {
border-color: $gray-300;
}There is a LOT of new SCSS here. I think there's a large chunk that might not ever be able to be matched, for example:
- Every
> tfoot, > tfoot > tr, > tfoot > tr > :first-child/:last-childselector is dead > thead > tr:first-childis redundant,theadhas one row> tbody:last-childis redundant, there is onetbody
The rest could be condensed, more readable, and less prone to drift using @each or something:
// The calendar table comes from `get_calendar()`, so the markup is fixed:
// one thead with a single row, one tbody, no tfoot.
$calendar-border-edges: (
"top": "> thead, > thead > tr, > thead > tr > *",
"right": "> *, > * > tr, > * > tr > :last-child",
"bottom": "> tbody, > tbody > tr:last-child, > tbody > tr:last-child > *",
"left": "> *, > * > tr, > * > tr > :first-child"
);
@each $edge, $selectors in $calendar-border-edges {
@each $property in ("color", "style", "width") {
table[style*="border-#{$edge}-#{$property}"] {
#{$selectors} {
border-#{$edge}-#{$property}: inherit;
@if $property == "width" {
border-#{$edge}-style: inherit;
}
}
}
}
}Regarding blockGap, the more I look at it the more I'm unsure it really fits here. There aren't inner blocks to the Calendar block yet. So we should probably avoid that and see where the proposals to add a Caption block actually go first.
Additionally, I think the current approach would mean Global Styles block gap won't work as Calendar doesn't have layout support. This sort of suggests that the test instructions probably need updating to better catch or test what this PR touches.
There's quite a bit in the packages/block-library/src/calendar/index.php file changes that we should also clean up including but not limited to (you'll probably need to look at this closer):
- We could reduce it to a single style engine call which would remove the second call, second classname array, second
add_classloop, and most of the reason thatblock_core_calendar_merge_style_attribute()exists. - We should leverage
??better here and remove redundantis_arraychecks etc. - It shouldn't have to walk every tag name directly either, that can be supplied to
next_tag()
The new tests are also pretty weak:
assertStringContainsString( 'border', $table_style )intest_render_applies_per_side_borders_to_table_onlypasses for essentially any output. Same forassertStringContainsString( '3px', ... )in the all-sides test.- In
test_get_stylesheet_calendar_background_targets_table_and_header_cells,.wp-block-calendar this a substring of.wp-block-calendar thead. The existing test right above it usesassertSameCSSwith the full expected stylesheet, which is the stronger convention to follow here. - Nothing exercises the borderColor preset attribute, and nothing asserts the table gets has-border-color. That class is what the whole SCSS propagation keys off, so it's the one thing most worth pinning.
One more small nit is:
background-color: inherit changed to transparent on table.has-background th. It is almost equivalent in practice, since tr computes to transparent, but it does stop the header picking up a theme-applied tr background. Not sure if that is a likely regression though. Unless we really need it to be transparent, keeping the original inherit would be better.
What?
Add border and spacing support to the Calendar block.
Borders apply to the table element; cells inherit color, style, and width (same pattern as the Table block).
Text and background colors remain skip-serialized on the table (#42029) so month navigation links are not affected.
Margin and padding serialize on the wrapper (.wp-block-calendar).
Block spacing (
blockGap) is skip-serialized and applied as margin-bottom on the caption for instance values only.Part of #43247
Part of #43243
Why?
The Calendar block is missing border, spacing, and block gap controls. Because it is a legacy server-rendered block, styles must be applied carefully to avoid breaking existing sites.
How?
blockGap) adds space between the caption and grid via margin-bottom on the caption. Global Styles block gap is not supported yet because Calendar has no layout support. Background remains on the table (not the wrapper) to avoid a breaking change where nav links would inherit the calendar background; wrapper padding does not fill with the table background.Testing Instructions
currentColor.Use Of AI Tools
Yes
Summary by CodeRabbit
New Features
Documentation
Tests