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.
85 lines
2.2 KiB
Go
85 lines
2.2 KiB
Go
package code
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import (
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"fmt"
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"log/slog"
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"github.com/egoist/mygo/ui"
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"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/pixel"
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)
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type HexViewerOptions struct {
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// Columns are bytes a row, 4–16; zero means 8.
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Columns int
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Disabled bool
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}
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type HexViewerResult struct {
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Element *ui.Element
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Changed bool
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}
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// HexViewer shows offsets, hex and ASCII; arrows move a cursor.
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func HexViewer(c *ui.Context, text string, data []byte, cursor *int, o HexViewerOptions) HexViewerResult {
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k := pixel.K(c)
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cols := pixel.Or("HexViewer Columns", o.Columns, 8)
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if cols < 4 || cols > 16 || len(data) == 0 || *cursor < 0 || *cursor >= len(data) {
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panic(fmt.Sprintf("code: HexViewer of %d bytes, %d a row, cursor %d", len(data), cols, *cursor))
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}
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rows := (len(data) + cols - 1) / cols
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var res HexViewerResult
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res.Element = ui.Row(c).Gap(k.D(6)).Children(func() {
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ui.Box(c).Size(k.D(15), k.D(rows*12)).Draw(func(p *ui.Painter, r ui.Rect) {
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g := k.Canvas(p, r)
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for i := range rows {
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g.Micro(0, i*12+4, fmt.Sprintf("%04X", i*cols), pixel.Faint, 1)
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}
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})
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old := *cursor
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shell, base, st, _ := pixel.Pad(c, text, cols, len(data), 12, 12, cursor, o.Disabled)
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b := data[*cursor]
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base.Description(fmt.Sprintf("%04X: %02X %q", *cursor, b, glyph(b)))
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at := *cursor
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shell.Draw(func(p *ui.Painter, r ui.Rect) {
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g := k.Canvas(p, r)
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for i, v := range data {
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x, y, ink := i%cols*12, i/cols*12, pixel.Ink
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switch {
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case i == at:
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g.Rect(x, y, 11, 12, pixel.Accent)
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ink = pixel.AccentInk
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case v == 0:
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ink = pixel.Faint
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}
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g.Micro(x+2, y+4, fmt.Sprintf("%02X", v), ink, 1)
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}
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g.Finish(st)
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})
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ui.Box(c).Size(k.D(cols*7), k.D(rows*12)).Draw(func(p *ui.Painter, r ui.Rect) {
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g := k.Canvas(p, r)
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for i, v := range data {
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x, y, ch := i%cols*7, i/cols*12, string(glyph(v))
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ink := pixel.Info
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if i == at {
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g.Rect(x, y, 7, 12, pixel.Accent)
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ink = pixel.AccentInk
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}
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g.Text(x+(7-pixel.Measure(ch))/2, y, ch, ink, 1)
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}
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})
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if res.Changed = *cursor != old; res.Changed {
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slog.Debug("8bit: hex viewer", "label", text, "offset", *cursor)
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}
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})
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return res
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}
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// glyph is b as a character; unprintable is a dot.
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func glyph(b byte) rune {
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if b < 0x20 || b > 0x7E {
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return '.'
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}
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return rune(b)
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}
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