initial

1 files changed, 99 insertions, 0 deletions

diff --git a/internal/tui/layout/border.go b/internal/tui/layout/border.go
new file mode 100644
index 000000000..d1b334b32
--- /dev/null
+++ b/internal/tui/layout/border.go
@@ -0,0 +1,99 @@
+package layout
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/charmbracelet/lipgloss"
+	"github.com/kujtimiihoxha/termai/internal/tui/styles"
+)
+
+type BorderPosition int
+
+const (
+	TopLeftBorder BorderPosition = iota
+	TopMiddleBorder
+	TopRightBorder
+	BottomLeftBorder
+	BottomMiddleBorder
+	BottomRightBorder
+)
+
+var (
+	ActiveBorder          = styles.Blue
+	InactivePreviewBorder = styles.Grey
+)
+
+func Borderize(content string, active bool, embeddedText map[BorderPosition]string) string {
+	if embeddedText == nil {
+		embeddedText = make(map[BorderPosition]string)
+	}
+	var (
+		thickness = map[bool]lipgloss.Border{
+			true:  lipgloss.Border(lipgloss.ThickBorder()),
+			false: lipgloss.Border(lipgloss.NormalBorder()),
+		}
+		color = map[bool]lipgloss.TerminalColor{
+			true:  ActiveBorder,
+			false: InactivePreviewBorder,
+		}
+		border = thickness[active]
+		style  = lipgloss.NewStyle().Foreground(color[active])
+		width  = lipgloss.Width(content)
+	)
+
+	encloseInSquareBrackets := func(text string) string {
+		if text != "" {
+			return fmt.Sprintf("%s%s%s",
+				style.Render(border.TopRight),
+				text,
+				style.Render(border.TopLeft),
+			)
+		}
+		return text
+	}
+	buildHorizontalBorder := func(leftText, middleText, rightText, leftCorner, inbetween, rightCorner string) string {
+		leftText = encloseInSquareBrackets(leftText)
+		middleText = encloseInSquareBrackets(middleText)
+		rightText = encloseInSquareBrackets(rightText)
+		// Calculate length of border between embedded texts
+		remaining := max(0, width-lipgloss.Width(leftText)-lipgloss.Width(middleText)-lipgloss.Width(rightText))
+		leftBorderLen := max(0, (width/2)-lipgloss.Width(leftText)-(lipgloss.Width(middleText)/2))
+		rightBorderLen := max(0, remaining-leftBorderLen)
+		// Then construct border string
+		s := leftText +
+			style.Render(strings.Repeat(inbetween, leftBorderLen)) +
+			middleText +
+			style.Render(strings.Repeat(inbetween, rightBorderLen)) +
+			rightText
+		// Make it fit in the space available between the two corners.
+		s = lipgloss.NewStyle().
+			Inline(true).
+			MaxWidth(width).
+			Render(s)
+		// Add the corners
+		return style.Render(leftCorner) + s + style.Render(rightCorner)
+	}
+	// Stack top border, content and horizontal borders, and bottom border.
+	return strings.Join([]string{
+		buildHorizontalBorder(
+			embeddedText[TopLeftBorder],
+			embeddedText[TopMiddleBorder],
+			embeddedText[TopRightBorder],
+			border.TopLeft,
+			border.Top,
+			border.TopRight,
+		),
+		lipgloss.NewStyle().
+			BorderForeground(color[active]).
+			Border(border, false, true, false, true).Render(content),
+		buildHorizontalBorder(
+			embeddedText[BottomLeftBorder],
+			embeddedText[BottomMiddleBorder],
+			embeddedText[BottomRightBorder],
+			border.BottomLeft,
+			border.Bottom,
+			border.BottomRight,
+		),
+	}, "\n")
+}