1 files changed, 93 insertions, 0 deletions
diff --git a/termui/error_popup.go b/termui/error_popup.go
new file mode 100644
index 00000000..f0af5a93
--- /dev/null
+++ b/termui/error_popup.go
@@ -0,0 +1,93 @@
+package termui
+
+import (
+	"fmt"
+	"github.com/jroimartin/gocui"
+	"strings"
+)
+
+const errorPopupView = "errorPopupView"
+
+type errorPopup struct {
+	err string
+}
+
+func newErrorPopup() *errorPopup {
+	return &errorPopup{
+		err: "",
+	}
+}
+
+func (ep *errorPopup) keybindings(g *gocui.Gui) error {
+	if err := g.SetKeybinding(errorPopupView, gocui.KeySpace, gocui.ModNone, ep.close); err != nil {
+		return err
+	}
+	if err := g.SetKeybinding(errorPopupView, gocui.KeyEnter, gocui.ModNone, ep.close); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (ep *errorPopup) layout(g *gocui.Gui) error {
+	if ep.err == "" {
+		return nil
+	}
+
+	maxX, maxY := g.Size()
+
+	width := minInt(30, maxX)
+	wrapped, nblines := word_wrap(ep.err, width-2)
+	height := minInt(nblines+2, maxY)
+	x0 := (maxX - width) / 2
+	y0 := (maxY - height) / 2
+
+	v, err := g.SetView(errorPopupView, x0, y0, x0+width, y0+height)
+	if err != nil {
+		if err != gocui.ErrUnknownView {
+			return err
+		}
+
+		v.Frame = true
+
+		fmt.Fprintf(v, wrapped)
+	}
+
+	if _, err := g.SetCurrentView(errorPopupView); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (ep *errorPopup) close(g *gocui.Gui, v *gocui.View) error {
+	ep.err = ""
+	g.DeleteView(errorPopupView)
+	return nil
+}
+
+func (ep *errorPopup) isActive() bool {
+	return ep.err != ""
+}
+
+func word_wrap(text string, lineWidth int) (string, int) {
+	words := strings.Fields(strings.TrimSpace(text))
+	if len(words) == 0 {
+		return text, 1
+	}
+	lines := 1
+	wrapped := words[0]
+	spaceLeft := lineWidth - len(wrapped)
+	for _, word := range words[1:] {
+		if len(word)+1 > spaceLeft {
+			wrapped += "\n" + word
+			spaceLeft = lineWidth - len(word)
+			lines++
+		} else {
+			wrapped += " " + word
+			spaceLeft -= 1 + len(word)
+		}
+	}
+
+	return wrapped, lines
+}