mirror of
https://codeberg.org/forgejo/forgejo.git
synced 2024-11-15 22:01:08 +00:00
[PORT] gitea##30237: Fix and rewrite contrast color calculation, fix project-related bugs
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="https://github.com/go-gitea/gitea/assets/115237/00b39e15-a377-4458-95cf-ceec74b78228"><img
width="90" alt="Screenshot 2024-04-02 at 01 51 30"
src="https://github.com/go-gitea/gitea/assets/115237/1677067a-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)
(cherry picked from commit f6c0c39f1a)
This commit is contained in:
silverwind
Earl Warren
parent
c6d2c18052
commit
9934931f1f
14 changed files with 136 additions and 195 deletions
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@ -53,13 +53,13 @@ func NewFuncMap() template.FuncMap {
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"JsonUtils": NewJsonUtils,
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// -----------------------------------------------------------------
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// svg / avatar / icon
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// svg / avatar / icon / color
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"svg": svg.RenderHTML,
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"EntryIcon": base.EntryIcon,
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"MigrationIcon": MigrationIcon,
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"ActionIcon": ActionIcon,
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"SortArrow": SortArrow,
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"SortArrow": SortArrow,
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"ContrastColor": util.ContrastColor,
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// -----------------------------------------------------------------
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// time / number / format
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@ -135,16 +135,9 @@ func RenderIssueTitle(ctx context.Context, text string, metas map[string]string)
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func RenderLabel(ctx context.Context, locale translation.Locale, label *issues_model.Label) template.HTML {
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var (
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archivedCSSClass string
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textColor = "#111"
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textColor = util.ContrastColor(label.Color)
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labelScope = label.ExclusiveScope()
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)
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r, g, b := util.HexToRBGColor(label.Color)
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// Determine if label text should be light or dark to be readable on background color
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// this doesn't account for saturation or transparency
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if util.UseLightTextOnBackground(r, g, b) {
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textColor = "#eee"
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}
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description := emoji.ReplaceAliases(template.HTMLEscapeString(label.Description))
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@ -168,7 +161,7 @@ func RenderLabel(ctx context.Context, locale translation.Locale, label *issues_m
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// Make scope and item background colors slightly darker and lighter respectively.
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// More contrast needed with higher luminance, empirically tweaked.
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luminance := util.GetLuminance(r, g, b)
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luminance := util.GetRelativeLuminance(label.Color)
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contrast := 0.01 + luminance*0.03
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// Ensure we add the same amount of contrast also near 0 and 1.
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darken := contrast + math.Max(luminance+contrast-1.0, 0.0)
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@ -178,6 +171,7 @@ func RenderLabel(ctx context.Context, locale translation.Locale, label *issues_m
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lightenFactor := math.Min(luminance+lighten, 1.0) / math.Max(luminance, 1.0/255.0)
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opacity := GetLabelOpacityByte(label.IsArchived())
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r, g, b := util.HexToRBGColor(label.Color)
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scopeBytes := []byte{
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uint8(math.Min(math.Round(r*darkenFactor), 255)),
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uint8(math.Min(math.Round(g*darkenFactor), 255)),
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@ -4,22 +4,10 @@ package util
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import (
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"fmt"
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"math"
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"strconv"
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"strings"
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)
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// Check similar implementation in web_src/js/utils/color.js and keep synchronization
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// Return R, G, B values defined in reletive luminance
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func getLuminanceRGB(channel float64) float64 {
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sRGB := channel / 255
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if sRGB <= 0.03928 {
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return sRGB / 12.92
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}
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return math.Pow((sRGB+0.055)/1.055, 2.4)
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}
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// Get color as RGB values in 0..255 range from the hex color string (with or without #)
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func HexToRBGColor(colorString string) (float64, float64, float64) {
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hexString := colorString
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@ -47,19 +35,23 @@ func HexToRBGColor(colorString string) (float64, float64, float64) {
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return r, g, b
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}
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// return luminance given RGB channels
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// Reference from: https://www.w3.org/WAI/GL/wiki/Relative_luminance
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func GetLuminance(r, g, b float64) float64 {
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R := getLuminanceRGB(r)
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G := getLuminanceRGB(g)
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B := getLuminanceRGB(b)
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luminance := 0.2126*R + 0.7152*G + 0.0722*B
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return luminance
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// Returns relative luminance for a SRGB color - https://en.wikipedia.org/wiki/Relative_luminance
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// Keep this in sync with web_src/js/utils/color.js
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func GetRelativeLuminance(color string) float64 {
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r, g, b := HexToRBGColor(color)
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return (0.2126729*r + 0.7151522*g + 0.0721750*b) / 255
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}
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// Reference from: https://firsching.ch/github_labels.html
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// In the future WCAG 3 APCA may be a better solution.
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// Check if text should use light color based on RGB of background
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func UseLightTextOnBackground(r, g, b float64) bool {
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return GetLuminance(r, g, b) < 0.453
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func UseLightText(backgroundColor string) bool {
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return GetRelativeLuminance(backgroundColor) < 0.453
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}
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// Given a background color, returns a black or white foreground color that the highest
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// contrast ratio. In the future, the APCA contrast function, or CSS `contrast-color` will be better.
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// https://github.com/color-js/color.js/blob/eb7b53f7a13bb716ec8b28c7a56f052cd599acd9/src/contrast/APCA.js#L42
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func ContrastColor(backgroundColor string) string {
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if UseLightText(backgroundColor) {
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return "#fff"
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}
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return "#000"
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}
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@ -33,33 +33,31 @@ func Test_HexToRBGColor(t *testing.T) {
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}
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}
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func Test_UseLightTextOnBackground(t *testing.T) {
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func Test_UseLightText(t *testing.T) {
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cases := []struct {
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r float64
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g float64
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b float64
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expected bool
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color string
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expected string
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}{
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{215, 58, 74, true},
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{0, 117, 202, true},
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{207, 211, 215, false},
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{162, 238, 239, false},
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{112, 87, 255, true},
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{0, 134, 114, true},
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{228, 230, 105, false},
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{216, 118, 227, true},
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{255, 255, 255, false},
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{43, 134, 133, true},
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{43, 135, 134, true},
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{44, 135, 134, true},
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{59, 182, 179, true},
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{124, 114, 104, true},
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{126, 113, 108, true},
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{129, 112, 109, true},
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{128, 112, 112, true},
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{"#d73a4a", "#fff"},
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{"#0075ca", "#fff"},
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{"#cfd3d7", "#000"},
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{"#a2eeef", "#000"},
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{"#7057ff", "#fff"},
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{"#008672", "#fff"},
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{"#e4e669", "#000"},
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{"#d876e3", "#000"},
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{"#ffffff", "#000"},
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{"#2b8684", "#fff"},
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{"#2b8786", "#fff"},
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{"#2c8786", "#000"},
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{"#3bb6b3", "#000"},
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{"#7c7268", "#fff"},
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{"#7e716c", "#fff"},
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{"#81706d", "#fff"},
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{"#807070", "#fff"},
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{"#84b6eb", "#000"},
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}
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for n, c := range cases {
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result := UseLightTextOnBackground(c.r, c.g, c.b)
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assert.Equal(t, c.expected, result, "case %d: error should match", n)
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assert.Equal(t, c.expected, ContrastColor(c.color), "case %d: error should match", n)
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}
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}
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@ -66,13 +66,13 @@
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<div id="project-board">
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<div class="board {{if .CanWriteProjects}}sortable{{end}}">
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{{range .Columns}}
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<div class="ui segment project-column" style="background: {{.Color}} !important;" data-id="{{.ID}}" data-sorting="{{.Sorting}}" data-url="{{$.Link}}/{{.ID}}">
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<div class="ui segment project-column"{{if .Color}} style="background: {{.Color}} !important; color: {{ContrastColor .Color}} !important"{{end}} data-id="{{.ID}}" data-sorting="{{.Sorting}}" data-url="{{$.Link}}/{{.ID}}">
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<div class="project-column-header{{if $canWriteProject}} tw-cursor-grab{{end}}">
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<div class="ui large label project-column-title tw-py-1">
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<div class="ui small circular grey label project-column-issue-count">
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{{.NumIssues ctx}}
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</div>
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{{.Title}}
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<span class="project-column-title-label">{{.Title}}</span>
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</div>
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{{if $canWriteProject}}
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<div class="ui dropdown jump item">
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@ -153,9 +153,7 @@
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</div>
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{{end}}
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</div>
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<div class="divider"></div>
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<div class="divider"{{if .Color}} style="color: {{ContrastColor .Color}} !important"{{end}}></div>
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<div class="ui cards" data-url="{{$.Link}}/{{.ID}}" data-project="{{$.Project.ID}}" data-board="{{.ID}}" id="board_{{.ID}}">
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{{range (index $.IssuesMap .ID)}}
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<div class="issue-card gt-word-break {{if $canWriteProject}}tw-cursor-grab{{end}}" data-issue="{{.ID}}">
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@ -22,34 +22,27 @@
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cursor: default;
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}
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.project-column .issue-card {
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color: var(--color-text);
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}
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.project-column-header {
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display: flex;
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align-items: center;
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justify-content: space-between;
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}
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.project-column-header.dark-label {
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color: var(--color-project-board-dark-label) !important;
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}
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.project-column-header.dark-label .project-column-title {
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color: var(--color-project-board-dark-label) !important;
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}
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.project-column-header.light-label {
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color: var(--color-project-board-light-label) !important;
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}
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.project-column-header.light-label .project-column-title {
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color: var(--color-project-board-light-label) !important;
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}
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.project-column-title {
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background: none !important;
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line-height: 1.25 !important;
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cursor: inherit;
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}
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.project-column-title,
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.project-column-issue-count {
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color: inherit !important;
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}
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.project-column > .cards {
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flex: 1;
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display: flex;
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@ -64,6 +57,8 @@
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.project-column > .divider {
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margin: 5px 0;
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border-color: currentcolor;
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opacity: .5;
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}
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.project-column:first-child {
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@ -2461,8 +2461,21 @@ td .commit-summary {
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height: 0.5em;
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}
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.labels-list {
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display: flex;
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flex-wrap: wrap;
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gap: 0.25em;
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}
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.labels-list a {
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display: flex;
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text-decoration: none;
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}
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.labels-list .label {
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margin: 2px 0;
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padding: 0 6px;
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margin: 0 !important;
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min-height: 20px;
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display: inline-flex !important;
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line-height: 1.3; /* there is a `font-size: 1.25em` for inside emoji, so here the line-height needs to be larger slightly */
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}
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@ -69,23 +69,6 @@
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}
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}
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#issue-list .flex-item-title .labels-list {
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display: flex;
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flex-wrap: wrap;
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gap: 0.25em;
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}
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#issue-list .flex-item-title .labels-list a {
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display: flex;
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text-decoration: none;
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}
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#issue-list .flex-item-title .labels-list .label {
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padding: 0 6px;
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margin: 0;
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min-height: 20px;
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}
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#issue-list .flex-item-body .branches {
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display: inline-flex;
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}
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@ -215,8 +215,6 @@
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--color-placeholder-text: var(--color-text-light-3);
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--color-editor-line-highlight: var(--color-primary-light-5);
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--color-project-board-bg: var(--color-secondary-light-2);
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--color-project-board-dark-label: #0e1011;
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--color-project-board-light-label: #dde0e2;
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--color-caret: var(--color-text); /* should ideally be --color-text-dark, see #15651 */
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--color-reaction-bg: #e8e8ff12;
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--color-reaction-hover-bg: var(--color-primary-light-4);
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@ -215,8 +215,6 @@
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--color-placeholder-text: var(--color-text-light-3);
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--color-editor-line-highlight: var(--color-primary-light-6);
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--color-project-board-bg: var(--color-secondary-light-4);
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--color-project-board-dark-label: #0e1114;
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--color-project-board-light-label: #eaeef2;
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--color-caret: var(--color-text-dark);
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--color-reaction-bg: #0000170a;
|
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--color-reaction-hover-bg: var(--color-primary-light-5);
|
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|
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@ -1,7 +1,6 @@
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<script>
|
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import {SvgIcon} from '../svg.js';
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import {useLightTextOnBackground} from '../utils/color.js';
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import tinycolor from 'tinycolor2';
|
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import {contrastColor} from '../utils/color.js';
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import {GET} from '../modules/fetch.js';
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import {emojiHTML} from '../features/emoji.js';
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import {htmlEscape} from 'escape-goat';
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@ -61,20 +60,13 @@ export default {
|
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},
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|
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labels() {
|
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return this.issue.labels.map((label) => {
|
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let textColor;
|
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const {r, g, b} = tinycolor(label.color).toRgb();
|
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if (useLightTextOnBackground(r, g, b)) {
|
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textColor = '#eeeeee';
|
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} else {
|
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textColor = '#111111';
|
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}
|
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label.name = htmlEscape(label.name);
|
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label.name = label.name.replaceAll(/:[-+\w]+:/g, (emoji) => {
|
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return this.issue.labels.map((label) => ({
|
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name: htmlEscape(label.name).replaceAll(/:[-+\w]+:/g, (emoji) => {
|
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return emojiHTML(emoji.substring(1, emoji.length - 1));
|
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});
|
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return {name: label.name, color: `#${label.color}`, textColor};
|
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});
|
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}),
|
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color: `#${label.color}`,
|
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textColor: contrastColor(`#${label.color}`),
|
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}));
|
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},
|
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},
|
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mounted() {
|
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|
|
@ -114,7 +106,7 @@ export default {
|
|||
<p><small>{{ issue.repository.full_name }} on {{ createdAt }}</small></p>
|
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<p><svg-icon :name="icon" :class="['text', color]"/> <strong>{{ issue.title }}</strong> #{{ issue.number }}</p>
|
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<p>{{ body }}</p>
|
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<div>
|
||||
<div class="labels-list">
|
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<!-- eslint-disable-next-line vue/no-v-html -->
|
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<div v-for="label in labels" :key="label.name" class="ui label" :style="{ color: label.textColor, backgroundColor: label.color }" v-html="label.name"/>
|
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</div>
|
||||
|
|
|
|||
|
|
@ -1,8 +1,8 @@
|
|||
import $ from 'jquery';
|
||||
import {useLightTextOnBackground} from '../utils/color.js';
|
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import tinycolor from 'tinycolor2';
|
||||
import {contrastColor} from '../utils/color.js';
|
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import {createSortable} from '../modules/sortable.js';
|
||||
import {POST, DELETE, PUT} from '../modules/fetch.js';
|
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import tinycolor from 'tinycolor2';
|
||||
|
||||
function updateIssueCount(cards) {
|
||||
const parent = cards.parentElement;
|
||||
|
|
@ -65,14 +65,11 @@ async function initRepoProjectSortable() {
|
|||
boardColumns = mainBoard.getElementsByClassName('project-column');
|
||||
for (let i = 0; i < boardColumns.length; i++) {
|
||||
const column = boardColumns[i];
|
||||
if (parseInt($(column).data('sorting')) !== i) {
|
||||
if (parseInt(column.getAttribute('data-sorting')) !== i) {
|
||||
try {
|
||||
await PUT($(column).data('url'), {
|
||||
data: {
|
||||
sorting: i,
|
||||
color: rgbToHex(window.getComputedStyle($(column)[0]).backgroundColor),
|
||||
},
|
||||
});
|
||||
const bgColor = column.style.backgroundColor; // will be rgb() string
|
||||
const color = bgColor ? tinycolor(bgColor).toHexString() : '';
|
||||
await PUT(column.getAttribute('data-url'), {data: {sorting: i, color}});
|
||||
} catch (error) {
|
||||
console.error(error);
|
||||
}
|
||||
|
|
@ -102,16 +99,10 @@ export function initRepoProject() {
|
|||
|
||||
for (const modal of document.getElementsByClassName('edit-project-column-modal')) {
|
||||
const projectHeader = modal.closest('.project-column-header');
|
||||
const projectTitleLabel = projectHeader?.querySelector('.project-column-title');
|
||||
const projectTitleLabel = projectHeader?.querySelector('.project-column-title-label');
|
||||
const projectTitleInput = modal.querySelector('.project-column-title-input');
|
||||
const projectColorInput = modal.querySelector('#new_project_column_color');
|
||||
const boardColumn = modal.closest('.project-column');
|
||||
const bgColor = boardColumn?.style.backgroundColor;
|
||||
|
||||
if (bgColor) {
|
||||
setLabelColor(projectHeader, rgbToHex(bgColor));
|
||||
}
|
||||
|
||||
modal.querySelector('.edit-project-column-button')?.addEventListener('click', async function (e) {
|
||||
e.preventDefault();
|
||||
try {
|
||||
|
|
@ -126,10 +117,21 @@ export function initRepoProject() {
|
|||
} finally {
|
||||
projectTitleLabel.textContent = projectTitleInput?.value;
|
||||
projectTitleInput.closest('form')?.classList.remove('dirty');
|
||||
if (projectColorInput?.value) {
|
||||
setLabelColor(projectHeader, projectColorInput.value);
|
||||
const dividers = boardColumn.querySelectorAll(':scope > .divider');
|
||||
if (projectColorInput.value) {
|
||||
const color = contrastColor(projectColorInput.value);
|
||||
boardColumn.style.setProperty('background', projectColorInput.value, 'important');
|
||||
boardColumn.style.setProperty('color', color, 'important');
|
||||
for (const divider of dividers) {
|
||||
divider.style.setProperty('color', color);
|
||||
}
|
||||
} else {
|
||||
boardColumn.style.removeProperty('background');
|
||||
boardColumn.style.removeProperty('color');
|
||||
for (const divider of dividers) {
|
||||
divider.style.removeProperty('color');
|
||||
}
|
||||
}
|
||||
boardColumn.style = `background: ${projectColorInput.value} !important`;
|
||||
$('.ui.modal').modal('hide');
|
||||
}
|
||||
});
|
||||
|
|
@ -182,24 +184,3 @@ export function initRepoProject() {
|
|||
createNewColumn(url, $columnTitle, $projectColorInput);
|
||||
});
|
||||
}
|
||||
|
||||
function setLabelColor(label, color) {
|
||||
const {r, g, b} = tinycolor(color).toRgb();
|
||||
if (useLightTextOnBackground(r, g, b)) {
|
||||
label.classList.remove('dark-label');
|
||||
label.classList.add('light-label');
|
||||
} else {
|
||||
label.classList.remove('light-label');
|
||||
label.classList.add('dark-label');
|
||||
}
|
||||
}
|
||||
|
||||
function rgbToHex(rgb) {
|
||||
rgb = rgb.match(/^rgba?\((\d+),\s*(\d+),\s*(\d+).*\)$/);
|
||||
return `#${hex(rgb[1])}${hex(rgb[2])}${hex(rgb[3])}`;
|
||||
}
|
||||
|
||||
function hex(x) {
|
||||
const hexDigits = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'];
|
||||
return Number.isNaN(x) ? '00' : hexDigits[(x - x % 16) / 16] + hexDigits[x % 16];
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,23 +1,21 @@
|
|||
// Check similar implementation in modules/util/color.go and keep synchronization
|
||||
// Return R, G, B values defined in reletive luminance
|
||||
function getLuminanceRGB(channel) {
|
||||
const sRGB = channel / 255;
|
||||
return (sRGB <= 0.03928) ? sRGB / 12.92 : ((sRGB + 0.055) / 1.055) ** 2.4;
|
||||
import tinycolor from 'tinycolor2';
|
||||
|
||||
// Returns relative luminance for a SRGB color - https://en.wikipedia.org/wiki/Relative_luminance
|
||||
// Keep this in sync with modules/util/color.go
|
||||
function getRelativeLuminance(color) {
|
||||
const {r, g, b} = tinycolor(color).toRgb();
|
||||
return (0.2126729 * r + 0.7151522 * g + 0.072175 * b) / 255;
|
||||
}
|
||||
|
||||
// Reference from: https://www.w3.org/WAI/GL/wiki/Relative_luminance
|
||||
function getLuminance(r, g, b) {
|
||||
const R = getLuminanceRGB(r);
|
||||
const G = getLuminanceRGB(g);
|
||||
const B = getLuminanceRGB(b);
|
||||
return 0.2126 * R + 0.7152 * G + 0.0722 * B;
|
||||
function useLightText(backgroundColor) {
|
||||
return getRelativeLuminance(backgroundColor) < 0.453;
|
||||
}
|
||||
|
||||
// Reference from: https://firsching.ch/github_labels.html
|
||||
// In the future WCAG 3 APCA may be a better solution.
|
||||
// Check if text should use light color based on RGB of background
|
||||
export function useLightTextOnBackground(r, g, b) {
|
||||
return getLuminance(r, g, b) < 0.453;
|
||||
// Given a background color, returns a black or white foreground color that the highest
|
||||
// contrast ratio. In the future, the APCA contrast function, or CSS `contrast-color` will be better.
|
||||
// https://github.com/color-js/color.js/blob/eb7b53f7a13bb716ec8b28c7a56f052cd599acd9/src/contrast/APCA.js#L42
|
||||
export function contrastColor(backgroundColor) {
|
||||
return useLightText(backgroundColor) ? '#fff' : '#000';
|
||||
}
|
||||
|
||||
function resolveColors(obj) {
|
||||
|
|
|
|||
|
|
@ -1,21 +1,22 @@
|
|||
import {useLightTextOnBackground} from './color.js';
|
||||
import {contrastColor} from './color.js';
|
||||
|
||||
test('useLightTextOnBackground', () => {
|
||||
expect(useLightTextOnBackground(215, 58, 74)).toBe(true);
|
||||
expect(useLightTextOnBackground(0, 117, 202)).toBe(true);
|
||||
expect(useLightTextOnBackground(207, 211, 215)).toBe(false);
|
||||
expect(useLightTextOnBackground(162, 238, 239)).toBe(false);
|
||||
expect(useLightTextOnBackground(112, 87, 255)).toBe(true);
|
||||
expect(useLightTextOnBackground(0, 134, 114)).toBe(true);
|
||||
expect(useLightTextOnBackground(228, 230, 105)).toBe(false);
|
||||
expect(useLightTextOnBackground(216, 118, 227)).toBe(true);
|
||||
expect(useLightTextOnBackground(255, 255, 255)).toBe(false);
|
||||
expect(useLightTextOnBackground(43, 134, 133)).toBe(true);
|
||||
expect(useLightTextOnBackground(43, 135, 134)).toBe(true);
|
||||
expect(useLightTextOnBackground(44, 135, 134)).toBe(true);
|
||||
expect(useLightTextOnBackground(59, 182, 179)).toBe(true);
|
||||
expect(useLightTextOnBackground(124, 114, 104)).toBe(true);
|
||||
expect(useLightTextOnBackground(126, 113, 108)).toBe(true);
|
||||
expect(useLightTextOnBackground(129, 112, 109)).toBe(true);
|
||||
expect(useLightTextOnBackground(128, 112, 112)).toBe(true);
|
||||
test('contrastColor', () => {
|
||||
expect(contrastColor('#d73a4a')).toBe('#fff');
|
||||
expect(contrastColor('#0075ca')).toBe('#fff');
|
||||
expect(contrastColor('#cfd3d7')).toBe('#000');
|
||||
expect(contrastColor('#a2eeef')).toBe('#000');
|
||||
expect(contrastColor('#7057ff')).toBe('#fff');
|
||||
expect(contrastColor('#008672')).toBe('#fff');
|
||||
expect(contrastColor('#e4e669')).toBe('#000');
|
||||
expect(contrastColor('#d876e3')).toBe('#000');
|
||||
expect(contrastColor('#ffffff')).toBe('#000');
|
||||
expect(contrastColor('#2b8684')).toBe('#fff');
|
||||
expect(contrastColor('#2b8786')).toBe('#fff');
|
||||
expect(contrastColor('#2c8786')).toBe('#000');
|
||||
expect(contrastColor('#3bb6b3')).toBe('#000');
|
||||
expect(contrastColor('#7c7268')).toBe('#fff');
|
||||
expect(contrastColor('#7e716c')).toBe('#fff');
|
||||
expect(contrastColor('#81706d')).toBe('#fff');
|
||||
expect(contrastColor('#807070')).toBe('#fff');
|
||||
expect(contrastColor('#84b6eb')).toBe('#000');
|
||||
});
|
||||
|
|
|
|||
Loading…
Reference in a new issue