82 lines
2.0 KiB
Go
82 lines
2.0 KiB
Go
package mujica
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import (
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"fmt"
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"log/slog"
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"net/url"
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"github.com/egoist/mygo/ui"
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"mujicaui/internal"
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"mujicaui/theme"
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)
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// LinkOptions configure a Link. An empty URL makes an in-app action link.
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type LinkOptions struct {
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// URL opens in the browser, or goes there in a MyGo router for a path.
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URL string
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// Error is the caller's open failure, shown below the link.
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Error string
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}
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// Link is underlined text activated by a click or Enter. Clicked reports
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// every activation. A malformed URL is not opened and shows an error.
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func Link(c *ui.Context, label string, opts LinkOptions) *ui.Element {
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if label == "" {
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panic("mujica: Link needs a label")
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}
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k := Tokens(c)
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u := Density(c).Unit()
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external := false
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problem := opts.Error
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target := opts.URL
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if opts.URL != "" {
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ok := false
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external, ok = linkCheck(opts.URL)
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if !ok {
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external, target = false, ""
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if problem == "" {
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problem = fmt.Sprintf(msg(c, "link.invalid"), opts.URL)
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}
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}
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}
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var l *ui.Element
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ui.Column(c).Gap(u).AlignItems(ui.Start).Children(func() {
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ui.Row(c).Gap(u).AlignItems(ui.Center).Children(func() {
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l = ui.Link(c, label, target).Underline().DecorationThickness(1)
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internal.Ring(l, k.Focus, theme.ControlRadius)
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color := k.AccentText
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if l.Pressed() || l.Hovered() {
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color = k.Text
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}
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l.TextColor(color).DecorationColor(color)
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if external {
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Icon(c, "external-link", IconOptions{Size: 12, Tone: IconAccent})
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}
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})
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if problem != "" {
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l.Error(problem)
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ui.Text(c, problem).TextColor(k.Danger).FontSize(theme.CaptionSize)
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}
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})
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if l.Clicked() {
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slog.Debug("mujica: link activate", "url", opts.URL, "opened", target != "")
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}
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return l
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}
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// linkCheck reports whether raw has a scheme, and whether it can be opened.
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func linkCheck(raw string) (external, ok bool) {
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p, err := url.Parse(raw)
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if err != nil {
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return false, false
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}
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switch p.Scheme {
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case "":
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return false, p.Path != "" || p.RawQuery != ""
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case "http", "https":
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return true, p.Host != ""
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}
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return true, p.Opaque != "" || p.Host != "" || p.Path != ""
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}
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