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authorDrew DeVault <sir@cmpwn.com>2018-02-17 20:21:33 -0500
committerDrew DeVault <sir@cmpwn.com>2018-02-17 20:21:33 -0500
commit05ec7357541bcc21dab041da01aec541f6c33cab (patch)
tree69ca6666e2958bd85c268deb4c33d09963701eff
parentf0791d4ba720c4cfa1d3f90c99296584aa878cd9 (diff)
downloadaerc-05ec7357541bcc21dab041da01aec541f6c33cab.tar.gz
Add text widget
-rw-r--r--cmd/aerc/main.go3
-rw-r--r--ui/text.go71
2 files changed, 74 insertions, 0 deletions
diff --git a/cmd/aerc/main.go b/cmd/aerc/main.go
index f666748..8541d08 100644
--- a/cmd/aerc/main.go
+++ b/cmd/aerc/main.go
@@ -62,6 +62,9 @@ func main() {
 	})
 
 	// TODO: move sidebar into tab content, probably
+	grid.AddChild(ui.NewText("aerc").
+		Strategy(ui.TEXT_CENTER).
+		Color(tb.ColorBlack, tb.ColorWhite))
 	// sidebar placeholder:
 	grid.AddChild(ui.NewBordered(
 		fill('.'), ui.BORDER_RIGHT)).At(1, 0).Span(2, 1)
diff --git a/ui/text.go b/ui/text.go
new file mode 100644
index 0000000..6164837
--- /dev/null
+++ b/ui/text.go
@@ -0,0 +1,71 @@
+package ui
+
+import (
+	"github.com/mattn/go-runewidth"
+	tb "github.com/nsf/termbox-go"
+)
+
+const (
+	TEXT_LEFT   = iota
+	TEXT_CENTER = iota
+	TEXT_RIGHT  = iota
+)
+
+type Text struct {
+	text         string
+	strategy     uint
+	fg           tb.Attribute
+	bg           tb.Attribute
+	onInvalidate func(d Drawable)
+}
+
+func NewText(text string) *Text {
+	return &Text{text: text}
+}
+
+func (t *Text) Text(text string) *Text {
+	t.text = text
+	t.Invalidate()
+	return t
+}
+
+func (t *Text) Strategy(strategy uint) *Text {
+	t.strategy = strategy
+	t.Invalidate()
+	return t
+}
+
+func (t *Text) Color(fg tb.Attribute, bg tb.Attribute) *Text {
+	t.fg = fg
+	t.bg = bg
+	t.Invalidate()
+	return t
+}
+
+func (t *Text) Draw(ctx *Context) {
+	size := runewidth.StringWidth(t.text)
+	cell := tb.Cell{
+		Ch: ' ',
+		Fg: t.fg,
+		Bg: t.bg,
+	}
+	x := 0
+	if t.strategy == TEXT_CENTER {
+		x = (ctx.Width() - size) / 2
+	}
+	if t.strategy == TEXT_RIGHT {
+		x = ctx.Width() - size
+	}
+	ctx.Fill(0, 0, ctx.Width(), ctx.Height(), cell)
+	ctx.Printf(x, 0, cell, "%s", t.text)
+}
+
+func (t *Text) OnInvalidate(onInvalidate func(d Drawable)) {
+	t.onInvalidate = onInvalidate
+}
+
+func (t *Text) Invalidate() {
+	if t.onInvalidate != nil {
+		t.onInvalidate(t)
+	}
+}