Absolute positioned checkboxes overlay floated elements #26870

rafh · 2023-09-01T19:47:32Z

Currently, checkboxes are positioned as absolute. This positioning causes the input to overlay an element that has been floated within the editor. Floated elements are useful if you want your text to wrap around this element. This PR fixes the overlaying of checkboxes by removing the absolute positioning, updating the ul padding, and displaying.task-list-item flex to ensure inputs and the associated label are on the same line.

Screenshots:

Before:

After:

silverwind · 2023-09-01T23:30:45Z

We need to be careful around markdown rendering to stay compatible with GitHub's rendering. Could you post your sample markdown document here so we can compare this and GitHub's solution (assuming they have fixed it).

rafh · 2023-09-04T19:34:09Z

Here's an example of my markdown. When an image is aligned left or right the following CSS is applied by GitHub

img[Attributes Style] {
    float: left;
    vertical-align: top;
    width: 200px;
}

example checkbox

kdumontnu

For traceability, it looks likes this regression was introduced in #17395

I added a bit of a stress-test to compare and it looks like a marked improvement:

Here is some base text
- [ ] One
- [ ] 

<img align="left" width="300" height="200" src="https://gitea.com/assets/img/logo.svg">

- [ ] Two
- [ ] Three
- [ ] Four
- [ ] 

More text


#### dense list
- [ ] foo
- [ ] barbarbarbarbarbarbarbar barbarbarbarbarbarbarbar barbarbarbarbarbarbarbar barbarbarbarbarbarbar barbarbarbarbar
- [ ] baz

#### not so dense list
- [ ] foo

- [ ] barbarbarbarbarbarbarbar barbarbarbarbarbarbarbar barbarbarbarbarbarbarbar barbarbarbarbarbarbar barbarbarbarbar
- [ ] second item

- [ ] baz

rafh · 2023-09-06T20:39:11Z

This is the associated markdown for this comment:

<img  align="left" alt="" width="200" src="/assets/6152817/d0b0b99a-db2b-4b6d-946d-277bfd24fc11">
* [ ]   example checkbox

Here's an example of my markdown. When an image is aligned left or right the following CSS is applied by GitHub
img[Attributes Style] {
    float: left;
    vertical-align: top;
    width: 200px;
}
example checkbox

kdumontnu · 2023-09-07T13:32:51Z

web_src/css/markup/content.css

@@ -144,7 +144,7 @@

 .markup ul,
 .markup ol {
-  padding-left: 2em;
+  padding-left: 0;


@rafh I'm worried about this style affecting other elements unrelated to checkboxes. Are there other markdown ul ol items this will apply to in markdown (I assume yes)?

Especially because this value was not changed here: https://github.com/go-gitea/gitea/pull/17411/files

(btw, this is an area front-end testing could validate)

@kdumontnu I understand your point. Instead, we should change the em back to 2em and update the .task-list-item to have margin-left: -2em;. This will ensure that all checkboxes are aligned properly without impacting all ol and ul.

Here's an example of the markup and how it is rendered within Gitea.

- [x] example content <img align="left" alt="" width="200" src="https://user-images.githubusercontent.com/6152817/265531274-d0b0b99a-db2b-4b6d-946d-277bfd24fc11.jpg"> - [x] example content Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur sed efficitur orci, eu cursus sapien. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur sed efficitur orci, eu cursus sapien. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur sed efficitur orci, eu cursus sapien. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur sed efficitur orci, eu cursus sapien. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur sed efficitur orci, eu cursus sapien. <img style="clear: both" alt="" width="200" src="https://user-images.githubusercontent.com/6152817/265531274-d0b0b99a-db2b-4b6d-946d-277bfd24fc11.jpg"> - [ ] one - [ ] two

That seems like a reasonable solution to me, or maybe you can add a :not(.task-list-item) to the selectors above and. Whatever will apply the style to the .task-list-item items, but not change the styling for other lists.

kdumontnu

See comment

kdumontnu

Looks good - one minor thing below you might want to address is that the spacing between non-dense checkboxes is greater than spacing between non-dense list items (code below)

Here is some base text
- [ ] One
- [ ] 

- Bullet
- Items

<img align="left" width="300" height="200" src="https://gitea.com/assets/img/logo.svg">

- [ ] Two
- [ ] Three
- [ ] Four
- [ ] 

More text


#### dense list
- [ ] foo
- [ ] barbarbarbarbarbarbarbar barbarbarbarbarbarbarbar barbarbarbarbarbarbarbar barbarbarbarbarbarbar barbarbarbarbar
- [ ] baz

#### not so dense list
- [ ] foo

- [ ] barbarbarbarbarbarbarbar barbarbarbarbarbarbarbar barbarbarbarbarbarbarbar barbarbarbarbarbarbar barbarbarbarbar
- [ ] second item

- [ ] baz

<img align="left" width="300" height="200" src="https://gitea.com/assets/img/logo.svg">

- bullet
- items

Here is some base text

One
[ ]
Bullet
Items

Two
Three
Four
[ ]

More text

dense list

foo
barbarbarbarbarbarbarbar barbarbarbarbarbarbarbar barbarbarbarbarbarbarbar barbarbarbarbarbarbar barbarbarbarbar
baz

not so dense list

foo
barbarbarbarbarbarbarbar barbarbarbarbarbarbarbar barbarbarbarbarbarbarbar barbarbarbarbarbarbar barbarbarbarbar
second item
baz

bullet
items

kdumontnu · 2023-09-12T18:33:23Z

@silverwind any other thoughts on this - seems like a clear improvement, and gets rid of the absolute positioning (which I'm sure is messing up some other rendering as well).

rafh · 2023-09-22T14:53:57Z

This is how GitHub renders the following markdown and how Gitea renders (edited to show latest commit changes)

Gitea(left) - GitHub(right)


- [ ] Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed aliquam velit ac metus vulputate egestas. Etiam ut enim iaculis, egestas mauris ac, convallis ex. Curabitur

- [ ] Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed aliquam velit ac metus vulputate egestas. Etiam ut enim iaculis, egestas mauris ac, convallis ex. Curabitur
 <img align="left" width="300" height="200" src="https://github.com/assets/6152817/d0b0b99a-db2b-4b6d-946d-277bfd24fc11">

- [ ] Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed aliquam velit ac metus vulputate egestas. Etiam ut enim iaculis, egestas mauris ac, convallis ex. Curabitur

#### dense list
- [ ] Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed aliquam velit ac metus vulputate egestas. Etiam ut enim iaculis, egestas mauris ac, convallis ex. Curabitur
- [ ] Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed aliquam velit ac metus vulputate egestas. Etiam ut enim iaculis, egestas mauris ac, convallis ex. Curabitur
- [ ] Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed aliquam velit ac metus vulputate egestas. Etiam ut enim iaculis, egestas mauris ac, convallis ex. Curabitur

> Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed aliquam velit ac metus vulputate egestas. Etiam ut enim iaculis, egestas mauris ac, convallis ex. Curabitur

- [ ] Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed aliquam velit ac metus vulputate egestas. Etiam ut enim iaculis, egestas mauris ac, convallis ex. Curabitur

 <img align="left" width="300" height="200" src="https://github.com/assets/6152817/d0b0b99a-db2b-4b6d-946d-277bfd24fc11">

#### not so dense list
- [ ] 1
- [ ] 2
- [ ] 3

delvh

I trust @kdumontnu's words that all potential regressions have been fixed.

wxiaoguang · 2023-09-28T01:03:22Z

I do no think this fix is right.

It breaks some more common layout like this:

* [ ] a
    * [ ] a1
    * [ ] a2
* [ ] b
* [ ] c
* [ ] d

----

* [ ] a
    * [ ] a1
    * [ ] a2

* [ ] b

kdumontnu · 2023-09-28T01:05:28Z

I do no think this fix is right.

It breaks some more common layout like this:
* [ ] a
    * [ ] a1
    * [ ] a2
* [ ] b
* [ ] c
* [ ] d

----

* [ ] a
    * [ ] a1
    * [ ] a2

* [ ] b

Thanks, good catch!

silverwind · 2023-09-28T18:57:56Z

Can we as a first step copy GitHub's CSS exactly to reproduce their rendering, and then improve upon it by adding the margin-left to the checkboxes so they are not "glued" to the image?

rafh · 2023-09-29T22:30:36Z

Can we as a first step copy GitHub's CSS exactly to reproduce their rendering, and then improve upon it by adding the margin-left to the checkboxes so they are not "glued" to the image?

I've applied the styling used by GitHub. I added more padding to left-aligned images. Otherwise, our checkboxes would lie directly next to the images.

Below I've consolidated all the markdown examples and added one more example at the top (empty checkboxes). I added this because the previous code had the following comment and I wanted to ensure this edge case was covered.

to render a checkbox list without content - [ ], we need this min-height to make sure the <li> can be visible

Empty Checkboxes
- [ ] 
- [ ] 

--- 

* [ ] a
    * [ ] a1
    * [ ] a2
* [ ] b
* [ ] c
* [ ] d

----

* [ ] a
    * [ ] a1
    * [ ] a2

* [ ] b


- [ ] Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed aliquam velit ac metus vulputate egestas. Etiam ut enim iaculis, egestas mauris ac, convallis ex. Curabitur

- [ ] Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed aliquam velit ac metus vulputate egestas. Etiam ut enim iaculis, egestas mauris ac, convallis ex. Curabitur

 <img align="left" width="300" height="200" src="https://github.com/assets/6152817/d0b0b99a-db2b-4b6d-946d-277bfd24fc11">

- [ ] Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed aliquam velit ac metus vulputate egestas. Etiam ut enim iaculis, egestas mauris ac, convallis ex. Curabitur

#### dense list
- [ ] Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed aliquam velit ac metus vulputate egestas. Etiam ut enim iaculis, egestas mauris ac, convallis ex. Curabitur
- [ ] Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed aliquam velit ac metus vulputate egestas. Etiam ut enim iaculis, egestas mauris ac, convallis ex. Curabitur
- [ ] Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed aliquam velit ac metus vulputate egestas. Etiam ut enim iaculis, egestas mauris ac, convallis ex. Curabitur

> Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed aliquam velit ac metus vulputate egestas. Etiam ut enim iaculis, egestas mauris ac, convallis ex. Curabitur

- [ ] Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed aliquam velit ac metus vulputate egestas. Etiam ut enim iaculis, egestas mauris ac, convallis ex. Curabitur

 <img align="left" width="300" height="200" src="https://github.com/assets/6152817/d0b0b99a-db2b-4b6d-946d-277bfd24fc11">

#### not so dense list
- [ ] 1
- [ ] 2
- [ ] 3


Here is some base text
- [ ] One
- [ ] 

- Bullet
- Items

<img align="left" width="300" height="200" src="https://gitea.com/assets/img/logo.svg">

- [ ] Two
- [ ] Three
- [ ] Four
- [ ] 

More text


#### dense list
- [ ] foo
- [ ] barbarbarbarbarbarbarbar barbarbarbarbarbarbarbar barbarbarbarbarbarbarbar barbarbarbarbarbarbar barbarbarbarbar
- [ ] baz

#### not so dense list
- [ ] foo

- [ ] barbarbarbarbarbarbarbar barbarbarbarbarbarbarbar barbarbarbarbarbarbarbar barbarbarbarbarbarbar barbarbarbarbar
- [ ] second item

- [ ] baz

<img align="left" width="300" height="200" src="https://gitea.com/assets/img/logo.svg">

- bullet
- items

Currently, checkboxes are positioned as absolute. This positioning causes the input to overlay an element that has been floated within the editor. Floated elements are useful if you want your text to wrap around this element. This PR fixes the overlaying of checkboxes by removing the absolute positioning, updating the `ul` padding, and displaying`.task-list-item` `flex` to ensure inputs and the associated label are on the same line. Screenshots: Before: <img width="762" alt="Screenshot 2023-09-01 at 3 40 59 PM" src="https://github.com/go-gitea/gitea/assets/6152817/570247c7-7f5c-4697-bfc9-ad4655e37991"> After: <img width="762" alt="Screenshot 2023-09-01 at 3 42 20 PM" src="https://github.com/go-gitea/gitea/assets/6152817/db53df45-1294-4eee-84c0-b21ac4fdf805"> --------- Co-authored-by: rafh <rafaelheard@gmail.com>

@rafh

) Backport #26870 by @rafh Currently, checkboxes are positioned as absolute. This positioning causes the input to overlay an element that has been floated within the editor. Floated elements are useful if you want your text to wrap around this element. This PR fixes the overlaying of checkboxes by removing the absolute positioning, updating the `ul` padding, and displaying`.task-list-item` `flex` to ensure inputs and the associated label are on the same line. Screenshots: Before: <img width="762" alt="Screenshot 2023-09-01 at 3 40 59 PM" src="https://github.com/go-gitea/gitea/assets/6152817/570247c7-7f5c-4697-bfc9-ad4655e37991"> After: <img width="762" alt="Screenshot 2023-09-01 at 3 42 20 PM" src="https://github.com/go-gitea/gitea/assets/6152817/db53df45-1294-4eee-84c0-b21ac4fdf805"> Co-authored-by: Rafael Heard <rafael.heard@gmail.com> Co-authored-by: rafh <rafaelheard@gmail.com>

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rafh added 2 commits September 6, 2023 12:31

posistion checkboxes relative

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remove padding from ol and ul

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Merge branch 'go-gitea:main' into main

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offset placement of list-item

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prevent vertical centering of checkboxes

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update styling to better align with github

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Absolute positioned checkboxes overlay floated elements (#26870) #27366

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Absolute positioned checkboxes overlay floated elements #26870

Absolute positioned checkboxes overlay floated elements #26870

rafh commented Sep 1, 2023

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Absolute positioned checkboxes overlay floated elements #26870

Absolute positioned checkboxes overlay floated elements #26870

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dense list

not so dense list

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