Initial patterm project

2026-05-14 13:37:20 +01:00
commit 69ef09aac4
40 changed files with 6521 additions and 0 deletions
--- a/internal/app/sidebar.go
+++ b/internal/app/sidebar.go
@@ -0,0 +1,143 @@
+package app
+
+import (
+	"fmt"
+	"os"
+	"strings"
+)
+
+const (
+	sidebarCols = 28
+	statusRows  = 1
+)
+
+// drawSidebar paints the right-rail session tree + scratchpad list.
+// SPEC §4: the rail is the active session's child hierarchy on top and
+// the scratchpad list (with preview) on the bottom.
+//
+// Implementation note: the PTY child's winsize is constrained to the
+// computed main viewport, so the sidebar region is outside the child's
+// cursor range. We can redraw freely without fighting the child for cells.
+func (st *uiState) drawSidebar() {
+	st.mu.Lock()
+	palOpen := st.palette != nil
+	focus := st.focusedID
+	st.mu.Unlock()
+	if palOpen {
+		return
+	}
+
+	layout := st.layoutSnapshot()
+	if !layout.sidebarVisible || layout.hostRows < 4 {
+		return
+	}
+	left := int(layout.sidebarLeft)
+	width := int(layout.sidebarWidth) - 1
+	maxRow := int(layout.statusRow) - statusRows
+
+	var b strings.Builder
+	// Border column at left-1: a single vertical pipe.
+	for r := 1; r <= maxRow; r++ {
+		fmt.Fprintf(&b, "\x1b[%d;%dH\x1b[2m│\x1b[0m", r, left-1)
+	}
+
+	row := 1
+	writeLine := func(s string, style string) {
+		if row > maxRow {
+			return
+		}
+		if len(s) > width {
+			s = s[:width]
+		}
+		fmt.Fprintf(&b, "\x1b[%d;%dH%s%s\x1b[0m\x1b[K", row, left, style, padRight(s, width))
+		row++
+	}
+
+	writeLine(" Session tree", "\x1b[1m")
+	writeLine(strings.Repeat("─", width-1), "\x1b[2m")
+
+	children := visibleSessionTree(st.sess.Children(), focus)
+	if len(children) == 0 {
+		writeLine(" (empty)", "\x1b[2m")
+	}
+	for _, c := range children {
+		glyph := "◉"
+		marker := "  "
+		if c.ID == focus {
+			marker = "▶ "
+		}
+		indent := ""
+		if c.ParentID != "" {
+			indent = "  "
+		}
+		line := fmt.Sprintf(" %s%s%s %s", marker, indent, glyph, c.Name)
+		style := ""
+		if c.ID == focus {
+			style = "\x1b[1m"
+		}
+		writeLine(line, style)
+	}
+
+	// Scratchpads list — pick the most-recently-modified one as the
+	// preview target. SPEC §4.
+	var previewName string
+	if row+2 <= maxRow {
+		row++
+		writeLine(" Scratchpads", "\x1b[1m")
+		writeLine(strings.Repeat("─", width-1), "\x1b[2m")
+		entries, err := st.pads.List()
+		if err == nil {
+			if len(entries) == 0 {
+				writeLine(" (none)", "\x1b[2m")
+			}
+			var newest string
+			var newestTS string
+			for _, e := range entries {
+				if e.ModifiedAt > newestTS {
+					newestTS = e.ModifiedAt
+					newest = e.Name
+				}
+			}
+			previewName = newest
+			for _, e := range entries {
+				if row > maxRow {
+					break
+				}
+				marker := "   "
+				style := ""
+				if e.Name == previewName {
+					marker = " ▸ "
+					style = "\x1b[1m"
+				}
+				writeLine(marker+e.Name, style)
+			}
+		}
+	}
+
+	// Preview pane at the bottom of the rail. Reserve up to 8 rows.
+	if previewName != "" && row+2 <= maxRow {
+		row++
+		writeLine(strings.Repeat("─", width-1), "\x1b[2m")
+		writeLine(" "+previewName, "\x1b[1m")
+		content, _, err := st.pads.Read(previewName)
+		if err == nil {
+			for _, line := range strings.Split(content, "\n") {
+				if row > maxRow {
+					break
+				}
+				writeLine(" "+line, "\x1b[2m")
+			}
+		}
+	}
+
+	// Blank-fill any rows the rail content didn't cover so stale
+	// content from a previous redraw doesn't linger.
+	for row <= maxRow {
+		writeLine("", "")
+	}
+
+	st.outMu.Lock()
+	// Save cursor; emit the sidebar; restore.
+	fmt.Fprintf(os.Stdout, "\x1b7%s\x1b8", b.String())
+	st.outMu.Unlock()
+}