Files
ZacharyZhang-NYandClaude Opus 5.5 03e1f91706 Upgrade MyGo to v0.5.5
Elements are now pass-scoped value handles: tests that read bounds
after a frame bind a ui.Handle. pixel tells frames apart by the build
pass's root, since the Tester clock no longer moves on its own.

Fix the regressions the upgrade brought:
- Clipboard reads in input handlers go through c.Services().
- MyGo notes an overlay's opener after building it, so AutoFocus
  inside lost it; pixel.AutoFocus focuses through a Handle, and
  archtest bans the raw call. Dialogs hand the focus back again.
- Elements around a press stay hovered: Tooltip tells a press-given
  focus by focus arriving under the pointer.
- The web host moves the Tester clock with real time, at most 500 ms
  a call, and gives components the real clock.

The gallery's source index also accepts CRLF checkouts.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
2026-10-17 01:31:08 -04:00

102 lines
2.9 KiB
Go

package files
import (
"fmt"
"log/slog"
"strconv"
"strings"
"github.com/egoist/mygo/ui"
"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/data"
"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/pixel"
)
// Dir is a named folder of folders and files.
type Dir struct {
Name string
Dirs []Dir
Files []File
}
type FileExplorerOptions struct {
// Height is the file list's in dots; zero means 120.
Height int
Disabled bool
}
type FileExplorerResult struct {
Element ui.Element
// Opened is Enter or a double click on a file.
Changed, Opened bool
}
// FileExplorer sets the folder tree beside the chosen folder's files.
func FileExplorer(c *ui.Context, text string, root Dir, path *string, file *int, o FileExplorerOptions) FileExplorerResult {
k := pixel.K(c)
dir, ok := folderAt(root, *path)
if !ok {
panic(fmt.Sprintf("files: FileExplorer has no folder at %q", *path))
}
pick("FileExplorer", file, len(dir.Files))
h := pixel.Or("FileExplorer Height", o.Height, 120)
tree, tw := node(root, 0)
var res FileExplorerResult
res.Element = ui.Row(c).FillWidth().Gap(k.D(4)).AlignItems(ui.Start).Role(ui.RoleGroup).Label(text).Children(func() {
old := *path
data.Tree(c, k.Msg("folders"), []data.TreeNode{tree}, path, data.TreeOptions{Width: tw, Disabled: o.Disabled})
if *path != old {
// A new folder starts with no file chosen.
dir, _ = folderAt(root, *path)
*file, res.Changed = -1, true
slog.Debug("8bit: file explorer folder", "label", text, "path", *path)
}
files := dir.Files
for _, f := range files {
check("FileExplorer", f)
}
l := data.List(c, dir.Name, len(files), file, data.ListOptions{Height: h, Disabled: o.Disabled}, func(i int) string { return files[i].Name }, func(i int) {
row(c, k, files[i], func() { pixel.Text(c, size(files[i].Size), pixel.TextOptions{Slot: pixel.Faint}) })
})
l.Element.Grow(1)
res.Changed = res.Changed || l.Changed
res.Opened = l.Submitted && *file >= 0
})
if res.Opened {
slog.Debug("8bit: file explorer open", "label", text, "file", *file)
}
return res
}
// node makes a folder's tree and the width it needs.
func node(f Dir, depth int) (data.TreeNode, int) {
if f.Name == "" {
panic("files: FileExplorer has a folder with no name")
}
// data.Tree indents ten dots a level; the arrow takes twelve.
n, w := data.TreeNode{Label: f.Name}, depth*10+16+pixel.Measure(f.Name)
for _, sub := range f.Dirs {
child, cw := node(sub, depth+1)
n.Children, w = append(n.Children, child), max(w, cw)
}
return n, w
}
// folderAt follows a tree path, "0/1", down from root.
func folderAt(root Dir, path string) (Dir, bool) {
parts := strings.Split(path, "/")
if parts[0] != "0" {
return Dir{}, false
}
f := root
for _, p := range parts[1:] {
// Only the plain form, as data.Tree writes it, is known.
i, err := strconv.Atoi(p)
if err != nil || strconv.Itoa(i) != p || i < 0 || i >= len(f.Dirs) {
return Dir{}, false
}
f = f.Dirs[i]
}
return f, true
}