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File Tree Diff: small documentation to mention the file selector #12011

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Feb 24, 2025
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File Tree Diff: small documentation to mention the file selector #12011

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File Tree Diff: small documentation to mention the file selector
humitos Feb 20, 2025
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Update docs/user/visual-diff.rst
humitos Feb 20, 2025
73a5b66
Update docs/user/visual-diff.rst
humitos Feb 20, 2025
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Update docs/user/visual-diff.rst
humitos Feb 20, 2025
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23 changes: 17 additions & 6 deletions docs/user/visual-diff.rst
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Expand Up @@ -12,18 +12,29 @@ and focus your review on what has changed in the current page.

Example of Visual diff

Enabling Visual diff
--------------------
Using Visual diff
-----------------

Visual diff is enabled by default and it's only available on pull request builds.
Once enabled, a new UI element appears at the top-right of the page showing a dropdown selector containing
all the files that have changed between the base version (e.g. ``latest``) and the current pull request build.

You can select any of those files from the dropdown to jump directly into that page.
Once there, you can toggle it on/off by pressing the :guilabel:`Show diff` link from the UI element to show all the chunks and their differences highlighted with red/green background colors.
Besides, you can jump between each of these chunks by clinking on the up/down arrows.

All the available configuration for the visual diff addon can be found under :guilabel:`Settings > Addons > Visual diff` in the :term:`dashboard`.
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It would be nice if we could link to this directly with a URL arg 🤔

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Hrm, I think Sphinx doesn't allow us to use guilabel with a link: https://www.sphinx-doc.org/en/master/usage/restructuredtext/roles.html#role-guilabel

Do we have an example of what you would like to render? BTW, the link where would point to? I suppose we would need something like "Choose organization" feature but for projects.


Visual diff is only enabled on pull request builds,
and can be toggled on and off with the ``d`` hotkey.

Troubleshooting Visual diff
---------------------------

Visual diff only works if there are changes on the page,
Visual diff only works when we detect changes on the page,
so ensure you are on a page that has changed in the current pull request.

There are also some known issues that currently don't display properly:
There are also some known issues that currently don't display properly.
We are working to improve the UX, but so far we've found the following issues:

* **Tables** are shown to have changes when they may not have changed. This is due to do subtly in how HTML tables are rendered, and will be fixed in a future version.
* **Invisible changes** sometimes are marked as diff due than the underlying HTML changed, but there is no visual change. This could happen if the URL of a link changed, for example.
* **Chunks background is incorrect** when we are unable to detect the correct main parent element for the chunk.
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I'm not 100% sure what this is saying? Will the background be missing or smaller than expected?

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When we don't detect the immediate main parent element of the chunk, we keep going up to the parent of the parent and so on. It could happens that the highlighted node ends up being the whole document.

I tried to find a quick example, but I wasn't able to. However, I know this happens sometimes.

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Seems like we just shouldn't highlight in that case? Maybe limit parent looking to 2-3 elements and explicitly avoid things that look like content divs.

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Yeah, we will fix this issue. I tried a few different stuffs already but none worked reliably.

I think it's fine to document it as a known bug/issue for now.