v0.1.0 initial commit

2026-07-12 17:01:37 -04:00
commit c3ca2ebb63
64 changed files with 10453 additions and 0 deletions
@@ -0,0 +1,197 @@
+package tui
+
+import (
+	"github.com/lixenwraith/terminal"
+)
+
+// EditorOpts configures editor rendering
+type EditorOpts struct {
+	LineNumbers  bool
+	LineNumWidth int // 0 = auto-size
+	WrapLines    bool
+	Border       LineType
+	Focused      bool
+	Style        EditorStyle
+}
+
+// EditorStyle defines editor colors
+type EditorStyle struct {
+	TextFg        terminal.RGB
+	TextBg        terminal.RGB
+	CursorFg      terminal.RGB
+	CursorBg      terminal.RGB
+	LineNumFg     terminal.RGB
+	LineNumBg     terminal.RGB
+	CurrentLineBg terminal.RGB
+	BorderFg      terminal.RGB
+}
+
+// DefaultEditorStyle returns default colors
+func DefaultEditorStyle() EditorStyle {
+	return EditorStyle{
+		TextFg:        terminal.RGB{R: 220, G: 220, B: 220},
+		TextBg:        terminal.RGB{R: 25, G: 25, B: 35},
+		CursorFg:      terminal.RGB{R: 0, G: 0, B: 0},
+		CursorBg:      terminal.RGB{R: 200, G: 200, B: 200},
+		LineNumFg:     terminal.RGB{R: 100, G: 100, B: 120},
+		LineNumBg:     terminal.RGB{R: 30, G: 30, B: 40},
+		CurrentLineBg: terminal.RGB{R: 35, G: 35, B: 50},
+		BorderFg:      terminal.RGB{R: 80, G: 80, B: 100},
+	}
+}
+
+// Editor renders multi-line editor and returns content height used
+func (r Region) Editor(state *EditorState, opts EditorOpts) int {
+	if r.W < 3 || r.H < 1 {
+		return 0
+	}
+
+	style := opts.Style
+	if style == (EditorStyle{}) {
+		style = DefaultEditorStyle()
+	}
+
+	// Calculate content area accounting for border
+	contentX := 0
+	contentY := 0
+	contentW := r.W
+	contentH := r.H
+
+	if opts.Border != LineNone {
+		if r.H < 3 {
+			return 0
+		}
+		r.Box(opts.Border, style.BorderFg)
+		contentX = 1
+		contentY = 1
+		contentW = r.W - 2
+		contentH = r.H - 2
+	}
+
+	// Line number gutter
+	gutterW := 0
+	if opts.LineNumbers {
+		gutterW = opts.LineNumWidth
+		if gutterW == 0 {
+			digits := 1
+			n := len(state.Lines)
+			for n >= 10 {
+				digits++
+				n /= 10
+			}
+			gutterW = digits + 1
+		}
+		contentW -= gutterW
+	}
+
+	if contentW < 1 || contentH < 1 {
+		return 0
+	}
+
+	state.AdjustScroll(contentW, contentH)
+
+	// Render each visible line
+	for y := 0; y < contentH; y++ {
+		lineIdx := state.ScrollY + y
+		isCurrentLine := lineIdx == state.CursorLine
+
+		bg := style.TextBg
+		if isCurrentLine && opts.Focused {
+			bg = style.CurrentLineBg
+		}
+
+		// Line number gutter
+		if opts.LineNumbers {
+			for gx := 0; gx < gutterW-1; gx++ {
+				r.Cell(contentX+gx, contentY+y, ' ', style.LineNumFg, style.LineNumBg, terminal.AttrNone)
+			}
+			r.Cell(contentX+gutterW-1, contentY+y, '│', style.LineNumFg, style.LineNumBg, terminal.AttrDim)
+
+			if lineIdx < len(state.Lines) {
+				numStr := formatLineNum(lineIdx+1, gutterW-1)
+				for i, ch := range numStr {
+					r.Cell(contentX+i, contentY+y, ch, style.LineNumFg, style.LineNumBg, terminal.AttrNone)
+				}
+			}
+		}
+
+		textX := contentX + gutterW
+
+		// Fill text area with background
+		for x := 0; x < contentW; x++ {
+			r.Cell(textX+x, contentY+y, ' ', style.TextFg, bg, terminal.AttrNone)
+		}
+
+		if lineIdx >= len(state.Lines) {
+			continue
+		}
+
+		line := []rune(state.Lines[lineIdx])
+
+		// Scroll indicator left
+		if state.ScrollX > 0 && len(line) > 0 {
+			r.Cell(textX, contentY+y, '◀', style.LineNumFg, bg, terminal.AttrDim)
+		}
+
+		// Render visible text
+		for x := 0; x < contentW; x++ {
+			charIdx := state.ScrollX + x
+			if charIdx >= len(line) {
+				break
+			}
+
+			ch := line[charIdx]
+			fg := style.TextFg
+			cellBg := bg
+
+			if opts.Focused && lineIdx == state.CursorLine && charIdx == state.CursorCol {
+				fg = style.CursorFg
+				cellBg = style.CursorBg
+			}
+
+			r.Cell(textX+x, contentY+y, ch, fg, cellBg, terminal.AttrNone)
+		}
+
+		// Scroll indicator right
+		if state.ScrollX+contentW < len(line) {
+			r.Cell(textX+contentW-1, contentY+y, '▶', style.LineNumFg, bg, terminal.AttrDim)
+		}
+
+		// Cursor at end of line
+		if opts.Focused && lineIdx == state.CursorLine && state.CursorCol >= len(line) {
+			cursorX := state.CursorCol - state.ScrollX
+			if cursorX >= 0 && cursorX < contentW {
+				r.Cell(textX+cursorX, contentY+y, ' ', style.CursorFg, style.CursorBg, terminal.AttrNone)
+			}
+		}
+	}
+
+	// Vertical scroll indicators
+	if state.ScrollY > 0 {
+		r.Cell(contentX+gutterW+contentW-1, contentY, '▲', style.LineNumFg, style.TextBg, terminal.AttrDim)
+	}
+	if state.ScrollY+contentH < len(state.Lines) {
+		r.Cell(contentX+gutterW+contentW-1, contentY+contentH-1, '▼', style.LineNumFg, style.TextBg, terminal.AttrDim)
+	}
+
+	if opts.Border != LineNone {
+		return r.H
+	}
+	return contentH
+}
+
+// formatLineNum formats line number right-aligned to width
+func formatLineNum(num, width int) string {
+	s := ""
+	for num > 0 {
+		s = string(rune('0'+num%10)) + s
+		num /= 10
+	}
+	if s == "" {
+		s = "0"
+	}
+	for len(s) < width {
+		s = " " + s
+	}
+	return s
+}