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[PORT] gitea##30237: Fix and rewrite contrast color calculation, fix project-related bugs

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1. The previous color contrast calculation function was incorrect at
least for the `#84b6eb` where it output low-contrast white instead of
black. I've rewritten these functions now to accept hex colors and to
match GitHub's calculation and to output pure white/black for maximum
contrast. Before and after:
<img width="94" alt="Screenshot 2024-04-02 at 01 53 46"
src="00b39e15-a377-4458-95cf-ceec74b78228"><img
width="90" alt="Screenshot 2024-04-02 at 01 51 30"
src="1677067a-8d8f-47eb-82c0-76330deeb775">

2. Fix project-related issues:

- Expose the new `ContrastColor` function as template helper and use it
for project cards, replacing the previous JS solution which eliminates a
flash of wrong color on page load.
- Fix a bug where if editing a project title, the counter would get
lost.
- Move `rgbToHex` function to color utils.

Co-authored-by: delvh <dev.lh@web.de>
Co-authored-by: Giteabot <teabot@gitea.io>

---
Conflict resolution: Trivial.
(cherry picked from commit 36887ed3921d03f1864360c95bd2ecf853bfbe72)
This commit is contained in:
silverwind 2024-04-07 18:19:25 +02:00 • committed by Gusted
parent 6f4827b3e0
commit f6c0c39f1a
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14 changed files with 136 additions and 195 deletions
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2
web_src/css/themes/theme-gitea-dark.css
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@ -215,8 +215,6 @@
--color-placeholder-text: var(--color-text-light-3);
--color-editor-line-highlight: var(--color-primary-light-5);
--color-project-board-bg: var(--color-secondary-light-2);
--color-project-board-dark-label: #0e1011;
--color-project-board-light-label: #dde0e2;
--color-caret: var(--color-text); /* should ideally be --color-text-dark, see #15651 */
--color-reaction-bg: #e8e8ff12;
--color-reaction-hover-bg: var(--color-primary-light-4);

2
web_src/css/themes/theme-gitea-light.css
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@ -215,8 +215,6 @@
--color-placeholder-text: var(--color-text-light-3);
--color-editor-line-highlight: var(--color-primary-light-6);
--color-project-board-bg: var(--color-secondary-light-4);
--color-project-board-dark-label: #0e1114;
--color-project-board-light-label: #eaeef2;
--color-caret: var(--color-text-dark);
--color-reaction-bg: #0000170a;
--color-reaction-hover-bg: var(--color-primary-light-5);