138 lines
4.1 KiB
Go
138 lines
4.1 KiB
Go
package input
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import (
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"fmt"
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"log/slog"
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"path/filepath"
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"strings"
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"github.com/egoist/mygo"
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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/icons"
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"git.zacharyzhang.com/ZacharyZhang-NY/MujicaUI/theme"
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)
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// FilePickerOptions configure a FilePicker.
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type FilePickerOptions struct {
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// Directory picks folders instead of files.
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Directory bool
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Multiple bool
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// Filters limit the files offered by extension, without the dot.
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Filters []mygo.FileFilter
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// Title is the system dialog's title.
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Title string
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// Label is the button text; empty uses the built-in "Choose file…" or "Choose folder…".
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Label string
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// Parent attaches the dialog to a window, as a sheet on macOS.
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Parent *mygo.Window
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Disabled bool
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}
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// FilePickerParts are the parts of a FilePicker.
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type FilePickerParts struct {
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Element *ui.Element
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changed bool
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canceled bool
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}
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// Changed reports whether the user picked new paths this frame.
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func (p FilePickerParts) Changed() bool { return p.changed }
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// Canceled reports whether the user closed the dialog without picking, which is not an error.
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func (p FilePickerParts) Canceled() bool { return p.canceled }
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// filePickerOpen shows the system dialog; tests replace it.
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var filePickerOpen = mygo.Dialog.Open
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type filePickerResult struct {
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paths []string
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err error
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}
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type filePickerState struct {
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result chan filePickerResult
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err string
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}
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// FilePicker opens the system file dialog off the UI thread and stores the chosen paths.
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func FilePicker(c *ui.Context, paths *[]string, opts FilePickerOptions) FilePickerParts {
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for _, f := range opts.Filters {
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for _, ext := range f.Extensions {
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if ext == "" || strings.HasPrefix(ext, ".") {
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panic(fmt.Sprintf("mujica: FilePicker extension %q: give it without the dot", ext))
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}
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}
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}
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k := core.Tokens(c)
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d := core.Density(c)
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parts := FilePickerParts{}
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col := ui.Column(c).Gap(d.Unit() * 2).AlignItems(ui.Start)
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parts.Element = col
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st := ui.Local(col, "picker", func() filePickerState { return filePickerState{} })
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if st.result != nil {
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select {
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case r := <-st.result:
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st.result = nil
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switch {
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case r.err != nil:
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st.err = fmt.Sprintf(core.Msg(c, "file_picker.failed"), r.err)
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slog.Debug("mujica: file picker failed", "err", r.err)
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case r.paths == nil:
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parts.canceled = true
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slog.Debug("mujica: file picker canceled")
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default:
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*paths = r.paths
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parts.changed = true
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slog.Debug("mujica: file picker picked", "count", len(r.paths))
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}
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default:
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}
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}
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label := opts.Label
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if label == "" {
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label = core.Msg(c, "file_picker.choose_file")
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if opts.Directory {
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label = core.Msg(c, "file_picker.choose_folder")
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}
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}
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icon := icons.Must("file")
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if opts.Directory {
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icon = icons.Must("folder")
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}
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col.Children(func() {
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b := Button(c, label, ButtonOptions{Variant: Secondary, Icon: icon, Loading: st.result != nil, Disabled: opts.Disabled})
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if b.Clicked() {
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st.err = ""
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ch := make(chan filePickerResult, 1)
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st.result = ch
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dlg := mygo.OpenDialogOptions{Parent: opts.Parent, Title: opts.Title, Filters: opts.Filters,
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Directory: opts.Directory, Multiple: opts.Multiple}
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slog.Debug("mujica: file picker opened", "directory", opts.Directory, "multiple", opts.Multiple)
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go func() {
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p, err := filePickerOpen(dlg)
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ch <- filePickerResult{p, err}
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c.Invalidate()
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}()
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}
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switch {
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case st.err != "":
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ui.Text(c, st.err).TextColor(k.Danger).FontSize(core.FontSize(c, theme.CaptionSize)).Role(ui.RoleStatus)
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case len(*paths) == 0:
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ui.Text(c, core.Msg(c, "file_picker.none")).TextColor(k.TextMuted).FontSize(core.FontSize(c, theme.CaptionSize))
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default:
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ui.Column(c).Gap(d.Unit()).Children(func() {
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for _, p := range *paths {
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ui.Row(c).Key(p).Gap(d.Unit() * 2).AlignItems(ui.Center).Children(func() {
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ui.Icon(c, icon).Size(14, 14).TextColor(k.TextMuted)
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ui.Text(c, filepath.Base(p)).SingleLine()
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ui.Text(c, filepath.Dir(p)).TextColor(k.TextMuted).FontSize(core.FontSize(c, theme.CaptionSize)).SingleLine().Ellipsis("…").MinWidth(0).Shrink(1)
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})
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}
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})
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}
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})
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return parts
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}
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