ZacharyZhang-NY
51af14709d
A terminal with history, a Go-colored code block, a log viewer that follows, a hex viewer, a memory map, a JSON tree, a line diff, a GAME OVER crash screen, an FPS meter, profiler bars, breakpoints, variables, command history, a shortcut list, a debug grid, a pixel editor that exports string art, a palette editor, a sprite sheet, a glyph map and a 6502 register view. layout.ScrollArea takes Follow, and ChatLog now uses it. data.TreeNode takes a Value drawn in its Slot. pixel gains Has, and Sprite.Art writes MustSprite art. pixel.Editor takes the caller's value at each input event, so a value changed between frames is never typed onto.
95 lines
2.4 KiB
Go
95 lines
2.4 KiB
Go
package code
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import (
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"fmt"
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"strings"
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"github.com/egoist/mygo/ui"
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"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/layout"
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"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/pixel"
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)
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type DiffViewOptions struct{}
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// change is a diff line's sign, text and line numbers.
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type change struct {
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sign byte
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text string
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old, new int
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}
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// DiffView marks lines removed with -, added with +.
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func DiffView(c *ui.Context, text, before, after string, o DiffViewOptions) *ui.Element {
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k := pixel.K(c)
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changes := diff(strings.Split(tidy(before), "\n"), strings.Split(tidy(after), "\n"))
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// Rows share the longest width, so tints line up.
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w := 0
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for _, ch := range changes {
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w = max(w, 32+pixel.Measure(ch.text))
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}
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return layout.Panel(c, layout.PanelOptions{Style: pixel.Sunken, Fill: pixel.Well, Padding: 2}, func() {
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for _, ch := range changes {
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ui.Box(c).Size(k.D(w), k.D(pixel.LineHeight)).Role(ui.RoleText).Label(string(ch.sign) + " " + ch.text).Draw(func(p *ui.Painter, r ui.Rect) {
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g := k.Canvas(p, r)
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// Changed lines take their color and a left bar.
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ink, text := pixel.Faint, pixel.Ink
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switch ch.sign {
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case '+':
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ink, text = pixel.Good, pixel.Good
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case '-':
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ink, text = pixel.Bad, pixel.Bad
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}
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if ch.sign != ' ' {
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g.Rect(0, 0, 2, g.H, ink)
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}
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num := func(x, n int) {
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if n > 0 {
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s := fmt.Sprint(n)
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g.Micro(x-pixel.MicroWidth(s), 4, s, pixel.Faint, 1)
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}
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}
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num(11, ch.old)
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num(23, ch.new)
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g.Text(26, 0, string(ch.sign), ink, 1)
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g.Text(32, 0, ch.text, text, 1)
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})
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}
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}).Role(ui.RoleGroup).Label(text)
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}
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// diff walks the longest common run of lines.
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func diff(a, b []string) []change {
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// lcs[i][j] is the common length of a[i:] and b[j:].
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lcs := make([][]int, len(a)+1)
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for i := range lcs {
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lcs[i] = make([]int, len(b)+1)
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}
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for i := len(a) - 1; i >= 0; i-- {
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for j := len(b) - 1; j >= 0; j-- {
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if a[i] == b[j] {
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lcs[i][j] = lcs[i+1][j+1] + 1
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} else {
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lcs[i][j] = max(lcs[i+1][j], lcs[i][j+1])
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}
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}
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}
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var out []change
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i, j := 0, 0
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for i < len(a) || j < len(b) {
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switch {
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case i < len(a) && j < len(b) && a[i] == b[j]:
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out = append(out, change{' ', a[i], i + 1, j + 1})
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i, j = i+1, j+1
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// Taken out before put in, as diffs read.
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case i < len(a) && (j == len(b) || lcs[i+1][j] >= lcs[i][j+1]):
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out = append(out, change{'-', a[i], i + 1, 0})
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i++
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default:
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out = append(out, change{'+', b[j], 0, j + 1})
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j++
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}
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}
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return out
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}
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