Implement style configuration.

Introduce the ability to configure stylesets, allowing customization of
aerc's look (color scheme, font weight, etc). Default styleset is
installed to /path/to/aerc/stylesets/default.

1 files changed, 107 insertions, 0 deletions

diff --git a/widgets/selector.go b/widgets/selector.go
new file mode 100644
index 00000000..d19d38f6
--- /dev/null
+++ b/widgets/selector.go
@@ -0,0 +1,107 @@
+package widgets
+
+import (
+	"github.com/gdamore/tcell"
+
+	"git.sr.ht/~sircmpwn/aerc/config"
+	"git.sr.ht/~sircmpwn/aerc/lib/ui"
+)
+
+type Selector struct {
+	ui.Invalidatable
+	chooser  bool
+	focused  bool
+	focus    int
+	options  []string
+	uiConfig config.UIConfig
+
+	onChoose func(option string)
+	onSelect func(option string)
+}
+
+func NewSelector(options []string, focus int, uiConfig config.UIConfig) *Selector {
+	return &Selector{
+		focus:    focus,
+		options:  options,
+		uiConfig: uiConfig,
+	}
+}
+
+func (sel *Selector) Chooser(chooser bool) *Selector {
+	sel.chooser = chooser
+	return sel
+}
+
+func (sel *Selector) Invalidate() {
+	sel.DoInvalidate(sel)
+}
+
+func (sel *Selector) Draw(ctx *ui.Context) {
+	ctx.Fill(0, 0, ctx.Width(), ctx.Height(), ' ',
+		sel.uiConfig.GetStyle(config.STYLE_SELECTOR_DEFAULT))
+	x := 2
+	for i, option := range sel.options {
+		style := sel.uiConfig.GetStyle(config.STYLE_SELECTOR_DEFAULT)
+		if sel.focus == i {
+			if sel.focused {
+				style = sel.uiConfig.GetStyle(config.STYLE_SELECTOR_FOCUSED)
+			} else if sel.chooser {
+				style = sel.uiConfig.GetStyle(config.STYLE_SELECTOR_CHOOSER)
+			}
+		}
+		x += ctx.Printf(x, 1, style, "[%s]", option)
+		x += 5
+	}
+}
+
+func (sel *Selector) OnChoose(fn func(option string)) *Selector {
+	sel.onChoose = fn
+	return sel
+}
+
+func (sel *Selector) OnSelect(fn func(option string)) *Selector {
+	sel.onSelect = fn
+	return sel
+}
+
+func (sel *Selector) Selected() string {
+	return sel.options[sel.focus]
+}
+
+func (sel *Selector) Focus(focus bool) {
+	sel.focused = focus
+	sel.Invalidate()
+}
+
+func (sel *Selector) Event(event tcell.Event) bool {
+	switch event := event.(type) {
+	case *tcell.EventKey:
+		switch event.Key() {
+		case tcell.KeyCtrlH:
+			fallthrough
+		case tcell.KeyLeft:
+			if sel.focus > 0 {
+				sel.focus--
+				sel.Invalidate()
+			}
+			if sel.onSelect != nil {
+				sel.onSelect(sel.Selected())
+			}
+		case tcell.KeyCtrlL:
+			fallthrough
+		case tcell.KeyRight:
+			if sel.focus < len(sel.options)-1 {
+				sel.focus++
+				sel.Invalidate()
+			}
+			if sel.onSelect != nil {
+				sel.onSelect(sel.Selected())
+			}
+		case tcell.KeyEnter:
+			if sel.onChoose != nil {
+				sel.onChoose(sel.Selected())
+			}
+		}
+	}
+	return false
+}