gitk: use headoutlinecolor, headbgcolor, and tagfgcolor config settings to change the color of the tags and head outlines and fill

[MagmaiKH]

This patch makes the config settings, headoutlinecolor and tagfgcolor, work.
These are existing config settings but not used in the code.

(I noticed that tagfgcolor was not working while making an extension for vscode that exports its color theme to gitk.)
(Upon review of the code I found that headoutlinecolor was also not used and investigated and fixed it.)

This simple patch has them affect the target UI elements while drawing refs and their outlined boxes.
Tags are drawn in their own code branch then heads and non-heads are drawn in another one.
Because both head and non-head refs are drawn in the same loop the colors used to draw (and fill) toggle between the head colors and (still hard-coded) non-head ref colors.

Image showing it working, reviewing the patch that made it work.

CC: Johannes Sixt [email protected]

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[gitgitgadget]

There are issues in commit 3c592f2:
gitk: use headoutlinecolor, headbgcolor, and tagfgcolor config settings to change the color of the tags and head outlines and fill

• First line of commit message is too long (> 76 columns)
• Lines in the body of the commit messages should be wrapped between 60 and 76 characters.
  Indented lines, and lines without whitespace, are exempt

[gitgitgadget]

There is an issue in commit ddbbd74:
gitk: use config settings for head/tag colors

• Lines in the body of the commit messages should be wrapped between 60 and 76 characters.
  Indented lines, and lines without whitespace, are exempt

[Ikke]

/allow

[gitgitgadget]

User MagmaiKH is now allowed to use GitGitGadget.

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[MagmaiKH]

/preview

[gitgitgadget]

Preview email sent as [email protected]

[MagmaiKH]

/submit

[gitgitgadget]

Submitted as [email protected]

To fetch this version into FETCH_HEAD:

git fetch https://github.com/gitgitgadget/git/ pr-2030/MagmaiKH/sbarber/use_color_config_variables-v1

To fetch this version to local tag pr-2030/MagmaiKH/sbarber/use_color_config_variables-v1:

git fetch --no-tags https://github.com/gitgitgadget/git/ tag pr-2030/MagmaiKH/sbarber/use_color_config_variables-v1

[gitgitgadget]

Johannes Sixt wrote on the Git mailing list (how to reply to this email):

Thank you for your contribution!

Am 13.01.26 um 07:28 schrieb Shannon Barber via GitGitGadget:
> From: Shannon Barber <[email protected]>
> 
> The drawtags procedure currently uses headfgcolor for all label text,
>  ignoring the tagfgcolor setting.
> 
> The call to create the outline polygon for (non-tag) heads currently
>  has the color for headoutlinecolor hardcoded to black.
> 
> This patch maintains the variables for the non-tag refs so that heads
>  are colored differently from non-head (non-tag) refs.
> 
> The outline and fill colors for the non-head refs remain hardcoded to
>  the prior values, black & #ddddff.
> 
> Signed-off-by: Shannon Barber <[email protected]>

In this project, the author and signer-off should be identical. Please
choose one identity for both.

It was very hard to figure out what the patch attempts to do. The commit
message wasn't very helpful, I am afraid. I would have appreciated if a
short summary of the status quo at a high level had been given. For example:

--- 8< ---
Gitk draws ref names with 4 different styles depending on the type of ref:

  - ...
  ...

The styles use variables that can be set in the configuration file for
..., but hard-codes the style for ... But there do exist configuration
entries for ... but they are not used. Replace the hard-coded values for
these latter ones, but leave the remaining styles unchanged.

...
--- 8< ---

What is also missing is what the implications for users are after the
change. Clearly, the settings stored in the configuration file are now
heeded. But what happens for users who are unaware that there are
settings (since they are not accessible via the UI). Are any observable
changes intentional? If yes, what is the possible impact?

BTW, the paragraph indentation is a bit odd.

The patch text looks good.

-- Hannes

[gitgitgadget]

There is an issue in commit bdff4af:
gitk: Honor the headoutlinecolor and tagfgcolor config settings

• Prefixed commit message must be in lower case