Engage!

1 files changed, 66 insertions, 0 deletions

diff --git a/intro.go b/intro.go
new file mode 100644
index 0000000..3b313a1
--- /dev/null
+++ b/intro.go
@@ -0,0 +1,66 @@
+package main
+
+// Handles drawing the splash screen (introduction) that appears when the editor
+// starts with no files.
+
+import (
+	"github.com/nsf/termbox-go"
+)
+
+// drawIntro clears the screen and draws an informational box with version and basic commands.
+func (e *Editor) drawIntro() {
+	w, h := termbox.Size()
+
+	// Define specific attributes for the intro screen elements.
+	const (
+		cTitle   = termbox.Attribute(254) | termbox.AttrBold
+		cText    = termbox.Attribute(248)
+		cVersion = termbox.Attribute(239)
+		cSubtext = termbox.Attribute(248)
+		cKey     = termbox.Attribute(254)
+		cLink    = termbox.Attribute(248) | termbox.AttrUnderline
+	)
+
+	// List of lines to display in the intro box.
+	lines := []struct {
+		text string
+		fg   termbox.Attribute
+	}{
+		{"qwe editor", cTitle},
+		{Version, cVersion},
+		{"", cText},
+		{"", cText},
+		{"By Mitja Felicijan et al.", cText},
+		{"Small, opinionated modal text editor", cSubtext},
+		{"", cText},
+		{" type  :q<Enter>             to exit", cKey},
+		{" type  :help<Enter>         for help", cKey},
+		{"", cText},
+		{"https://github.com/mitjafelicijan/qwe-editor", cLink},
+	}
+
+	// Calculate the maximum line length to center the box.
+	maxLen := 0
+	for _, line := range lines {
+		if len(line.text) > maxLen {
+			maxLen = len(line.text)
+		}
+	}
+
+	boxWidth := maxLen + 2
+	boxHeight := len(lines)
+
+	// Center point for the box.
+	startX := (w - boxWidth) / 2
+	startY := (h - boxHeight) / 2
+
+	_, bg := GetThemeColor(ColorDefault)
+	for i, line := range lines {
+		// Center each line individually within the box.
+		lineX := startX + (maxLen-len(line.text))/2
+		lineY := startY + i
+		for j, char := range line.text {
+			termbox.SetCell(lineX+j, lineY, char, line.fg, bg)
+		}
+	}
+}