74 lines
1.8 KiB
Go
74 lines
1.8 KiB
Go
package git
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import (
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"fmt"
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"math"
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"github.com/egoist/mygo/ui"
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"git.zacharyzhang.com/ZacharyZhang-NY/MujicaUI/core"
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"git.zacharyzhang.com/ZacharyZhang-NY/MujicaUI/theme"
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)
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// DiffStatOptions configure a DiffStat.
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type DiffStatOptions struct {
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// Blocks is the ratio bar length; zero means 5.
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Blocks int
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}
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// DiffStat shows added and deleted counts with a ratio bar.
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func DiffStat(c *ui.Context, added, deleted int, opts DiffStatOptions) *ui.Element {
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if added < 0 || deleted < 0 {
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panic("mujica: DiffStat counts must not be negative")
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}
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n := opts.Blocks
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if n == 0 {
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n = 5
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}
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if n < 0 {
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panic("mujica: DiffStat Blocks is negative")
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}
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k := core.Tokens(c)
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u := core.Density(c).Unit()
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plus, minus := diffStatBlocks(added, deleted, n)
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row := ui.Row(c).AlignItems(ui.Center).Gap(u * 2).Shrink(0).
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Label(fmt.Sprintf(core.Msg(c, "diff_stat.label"), added, deleted))
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row.Children(func() {
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mono := func(s string, col ui.Color) {
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ui.Text(c, s).Font(theme.MonoFont).FontFeatures("tnum").FontSize(core.FontSize(c, theme.CaptionSize)).TextColor(col).SingleLine()
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}
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mono(fmt.Sprintf("+%d", added), k.Success)
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mono(fmt.Sprintf("−%d", deleted), k.Danger)
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ui.Row(c).Gap(2).Shrink(0).Role(ui.RoleNone).Children(func() {
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for i := range n {
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col := k.Border
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switch {
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case i < plus:
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col = k.Success
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case i < plus+minus:
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col = k.Danger
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}
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ui.Box(c).Size(8, 8).Radius(1).Background(col)
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}
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})
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})
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return row
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}
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// diffStatBlocks splits n blocks, one at least per nonzero side.
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func diffStatBlocks(added, deleted, n int) (plus, minus int) {
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total := added + deleted
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if total == 0 {
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return 0, 0
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}
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plus = int(math.Round(float64(added) / float64(total) * float64(n)))
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minus = n - plus
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if added > 0 && plus == 0 {
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plus, minus = 1, n-1
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}
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if deleted > 0 && minus == 0 && n > 1 {
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plus, minus = n-1, 1
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}
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return plus, minus
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}
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