Refine image preview integration

README.md

@@ -147,6 +147,5 @@ Release artifacts:
 ## Notes
 
 - File creation time depends on filesystem/OS support; unavailable values are shown as `n/a`.
-- Image preview in info pane (`F9`) and image full-screen view (`F3`) use `chafa`.
 
 Architecture notes: [docs/architecture.md](/home/vrubel/projects/vcom/docs/architecture.md)

flake.nix

@@ -35,11 +35,6 @@
         package = pkgs.symlinkJoin {
           name = "vcom";
           paths = [ packageBase ];
-          nativeBuildInputs = [ pkgs.makeWrapper ];
-          postBuild = ''
-            wrapProgram "$out/bin/vcom" \
-              --prefix PATH : "${lib.makeBinPath [ pkgs.chafa ]}"
-          '';
         };
       in {
         packages.default = package;

internal/fs/preview.go

@@ -9,7 +9,6 @@ import (
 	_ "image/png"
 	"io"
 	"os"
-	"os/exec"
 	"path/filepath"
 	"regexp"
 	"strconv"
@@ -123,9 +122,7 @@ func BuildPreview(entry Entry, options PreviewOptions) Preview {
 		preview.Metadata.ImageFormat = format
 		preview.Metadata.ImageSize = dimensions
 		inline := renderImageInlinePreview(entry.Path, options.ImagePreviewWidth, options.ImagePreviewHeight)
-		if inline == "" {
-			preview.Body = "Image preview unavailable.\n\nInstall `chafa` for inline preview in info pane."
-		} else {
+		if inline != "" {
 			preview.Body = inline
 		}
 		preview.PlainBody = preview.Body
@@ -381,38 +378,9 @@ func previewIcon(entry Entry, useNerdIcons bool) string {
 }
 
 func renderImageInlinePreview(path string, width int, height int) string {
-	if width < 20 {
-		width = 20
-	}
-	if height < 8 {
-		height = 8
-	}
-
-	if _, err := exec.LookPath("chafa"); err != nil {
 	return ""
 }
 
-	cmd := exec.Command(
-		"chafa",
-		"--format=symbols",
-		"--symbols=vhalf",
-		"--animate=off",
-		"--fg-only",
-		"--size", fmt.Sprintf("%dx%d", width, height),
-		path,
-	)
-	out, err := cmd.Output()
-	if err != nil {
-		return ""
-	}
-
-	view := strings.TrimSpace(string(out))
-	if view == "" {
-		return ""
-	}
-	return view
-}
-
 func detectImage(data []byte) (string, string, bool) {
 	cfg, format, err := image.DecodeConfig(bytes.NewReader(data))
 	if err != nil {

internal/ui/image_overlay.go

@@ -89,7 +89,7 @@ func (m *imageOverlayManager) backendOutput() string {
 	case os.Getenv("DISPLAY") != "":
 		order = append(order, "x11")
 	}
-	order = append(order, "wayland", "x11", "sixel", "kitty", "chafa")
+	order = append(order, "wayland", "x11", "sixel", "kitty")
 
 	unique := make([]string, 0, len(order))
 	for _, backend := range order {

internal/ui/model.go

@@ -3,6 +3,7 @@ package ui
 import (
 	"context"
 	"fmt"
+	"io"
 	"os"
 	"os/exec"
 	"path/filepath"
@@ -111,6 +112,10 @@ type copyDoneMsg struct {
 }
 
 type dismissNoticeMsg struct{}
+type externalOpenMsg struct {
+	path string
+	err  error
+}
 
 type copyJobState struct {
 	id          int
@@ -412,6 +417,14 @@ func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 		}
 		return m, nil
 
+	case externalOpenMsg:
+		if msg.err != nil {
+			m.status = fmt.Sprintf("Open failed: %v", msg.err)
+			return m, nil
+		}
+		m.status = fmt.Sprintf("Opened %s", filepath.Base(msg.path))
+		return m, nil
+
 	case tea.KeyMsg:
 		if m.modal.kind != modalNone {
 			return m.handleModalKey(msg)
@@ -1026,9 +1039,7 @@ func (m *Model) handleOpenExternal() (tea.Model, tea.Cmd) {
 
 	m.cleanupImageOverlay()
 	m.status = fmt.Sprintf("Opening %s with %s", selected.DisplayName(), name)
-	return m, tea.ExecProcess(command, func(err error) tea.Msg {
-		return opMsg{kind: opView, sourcePath: selected.Path, err: err}
-	})
+	return m, startExternalOpenCmd(command, selected.Path)
 }
 
 func (m *Model) handleEdit() (tea.Model, tea.Cmd) {
@@ -2598,6 +2609,18 @@ func externalCommandFromEnv(envVars []string, fallbacks []string, path string) (
 	return exec.Command(parts[0], args...), filepath.Base(parts[0]), nil
 }
 
+func startExternalOpenCmd(command *exec.Cmd, path string) tea.Cmd {
+	return func() tea.Msg {
+		command.Stdin = nil
+		command.Stdout = io.Discard
+		command.Stderr = io.Discard
+		if err := command.Start(); err != nil {
+			return externalOpenMsg{path: path, err: err}
+		}
+		return externalOpenMsg{path: path}
+	}
+}
+
 func enableMouseCmd() tea.Cmd {
 	return func() tea.Msg {
 		return tea.EnableMouseCellMotion()
@@ -2753,11 +2776,21 @@ func (m Model) syncImageOverlay(leftWidth int, previewWidth int, bodyHeight int)
 		if m.active == PaneLeft {
 			startX = leftWidth + m.cfg.UI.PaneGap
 		}
+		innerWidth := max(previewWidth-2, 1)
+		metaHeight := 0
+		if m.cfg.Preview.ShowMetadata {
+			metaHeight = lipgloss.Height(renderMetadata(m.previewData.Metadata, m.palette, innerWidth))
+		}
+		titleHeight := 1
+		topInset := 1
+		contentBorder := 1
+		safetyGap := 1
+		contentTop := topInset + titleHeight + metaHeight + contentBorder + safetyGap
 		rect = overlayRect{
-			x:      startX + 2,
-			y:      9,
-			width:  max(previewWidth-4, 1),
-			height: max(bodyHeight-11, 1),
+			x:      startX + 3,
+			y:      contentTop,
+			width:  max(previewWidth-6, 1),
+			height: max(bodyHeight-contentTop-2, 1),
 		}
 	} else {
 		m.overlay.hide()