successfully showing the image previews for lf

4 files changed, 149 insertions, 5 deletions

diff --git a/modules/scripts/default.nix b/modules/scripts/default.nix
index a16cb8d..0ad8e0f 100644
--- a/modules/scripts/default.nix
+++ b/modules/scripts/default.nix
@@ -27,6 +27,16 @@ let
   scripts = {
     deep-clean = mkScript "deep-clean" ./deep-clean.sh { };
 
+    file-preview = lib.mkIf config.tools.fzf.enable (
+      mkScript "file-preview" ./file-preview.sh {
+      }
+    );
+
+    file-preview-clean = lib.mkIf config.tools.fzf.enable (
+      mkScript "file-preview-clean" ./file-preview-clean.sh {
+      }
+    );
+
     fzf-launcher = lib.mkIf config.tools.fzf.enable (
       mkScript "fzf-launcher" ./fzf-launcher.sh {
         FZF = lib.getExe pkgs.fzf;
@@ -90,6 +100,9 @@ in
   config = {
     scripts = scripts;
 
-    home.packages = lib.filter (x: x != null) (lib.mapAttrsToList (_: v: lib.mkIf true v) scripts);
+    home.packages = [
+      pkgs.file
+    ]
+    ++ (lib.filter (x: x != null) (lib.mapAttrsToList (_: v: lib.mkIf true v) scripts));
   };
 }
diff --git a/modules/scripts/file-preview-clean.sh b/modules/scripts/file-preview-clean.sh
new file mode 100644
index 0000000..243d937
--- /dev/null
+++ b/modules/scripts/file-preview-clean.sh
@@ -0,0 +1 @@
+exec kitten icat --clear --stdin no --transfer-mode memory </dev/null >/dev/tty
diff --git a/modules/scripts/file-preview.sh b/modules/scripts/file-preview.sh
new file mode 100644
index 0000000..c0996ba
--- /dev/null
+++ b/modules/scripts/file-preview.sh
@@ -0,0 +1,131 @@
+# Timeout protection (prevents hanging)
+TIMEOUT=5
+if [ -z "$LF_PREVIEW_RUNNING" ]; then
+    export LF_PREVIEW_RUNNING=1
+    exec timeout "$TIMEOUT" "$0" "$@"
+fi
+
+# Parameters from lf
+FILE="$1"
+WIDTH="$2"
+HEIGHT="$3"
+X="$4"
+Y="$5"
+
+# Temp dir
+TMP_DIR="/tmp/lf-preview-$(id -u)"
+mkdir -p "$TMP_DIR"
+TMP_IMG="$TMP_DIR/pv-$(basename "$FILE" | tr -c '[:alnum:]' '_').png"
+
+# Render image via kitty
+render_image() {
+  kitten icat --stdin no --transfer-mode memory --place "${w}x${h}@${x}x${y}" "$1" </dev/null >/dev/tty
+  exit 1
+}
+
+file="$1"
+w="$2"
+h="$3"
+x="$4"
+y="$5"
+
+# Ensure file exists
+[ ! -r "$FILE" ] && exit 0
+
+MIMETYPE=$(file --dereference --brief --mime-type "$FILE")
+
+echo $FILE > /tmp/testing-my-script.txt
+echo $MIMETYPE >> /tmp/testing-my-script.txt
+
+case "$MIMETYPE" in
+  # --- IMAGES ---
+  image/svg+xml)
+    rsvg-convert "$FILE" -o "$TMP_IMG" >/dev/null 2>&1 && render_image "$TMP_IMG"
+    ;;
+  image/*)
+    render_image "$FILE"
+    ;;
+
+  # --- VIDEOS ---
+  video/*)
+    if command -v ffmpegthumbnailer >/dev/null; then
+      ffmpegthumbnailer -i "$FILE" -o "$TMP_IMG" -s 0 -q 5 >/dev/null 2>&1
+    else
+      ffmpeg -y -i "$FILE" -ss 00:00:01 -vframes 1 "$TMP_IMG" >/dev/null 2>&1
+    fi
+    [ -f "$TMP_IMG" ] && render_image "$TMP_IMG"
+    ;;
+
+  # --- AUDIO ---
+  audio/*)
+    ffmpeg -y -i "$FILE" \
+      -filter_complex "showwavespic=s=${WIDTH}x${HEIGHT}:colors=white" \
+      -frames:v 1 "$TMP_IMG" >/dev/null 2>&1
+
+    ffprobe -hide_banner -v quiet -show_format -show_streams "$FILE"
+
+    [ -f "$TMP_IMG" ] && render_image "$TMP_IMG"
+    exit 0
+    ;;
+
+  # --- PDF ---
+  application/pdf)
+    pdftoppm -f 1 -l 1 -png -singlefile "$FILE" "${TMP_IMG%.png}" >/dev/null 2>&1
+    [ -f "$TMP_IMG" ] && render_image "$TMP_IMG"
+    ;;
+
+  # --- EPUB / MOBI ---
+  application/epub+zip|application/x-mobipocket-ebook)
+    unzip -p "$FILE" "*/cover*.jpg" > "$TMP_IMG" 2>/dev/null
+    [ -s "$TMP_IMG" ] && render_image "$TMP_IMG"
+    ;;
+
+  # --- OFFICE ---
+  application/vnd.openxmlformats-officedocument.*|application/msword|application/vnd.oasis.opendocument.*)
+    libreoffice --headless --convert-to pdf --outdir "$TMP_DIR" "$FILE" >/dev/null 2>&1
+    PDF_VER="${TMP_DIR}/$(basename "${FILE%.*}").pdf"
+    if [ -f "$PDF_VER" ]; then
+        pdftoppm -f 1 -l 1 -png -singlefile "$PDF_VER" "${TMP_IMG%.png}" >/dev/null 2>&1
+        render_image "$TMP_IMG"
+    fi
+    ;;
+
+  # --- ARCHIVES ---
+  application/zip|application/x-7z-compressed|application/x-rar|application/x-tar|application/x-gzip)
+    7z l "$FILE" 2>/dev/null || bsdtar -tf "$FILE"
+    exit 0
+    ;;
+
+  # --- TEXT / CODE ---
+  text/*|application/json|application/javascript|application/xml)
+    if command -v nvim >/dev/null; then
+      nvim --headless \
+        +"set nomore" \
+        +"set nowrap" \
+        +"syntax on" \
+        +"set number" \
+        +"0,200print" \
+    +q "$FILE" 2>/dev/null
+    else
+        cat "$FILE"
+    fi
+    exit 0
+    ;;
+
+  # --- FONTS ---
+  font/*|application/vnd.ms-fontobject|application/x-font-ttf)
+    fc-scan "$FILE"
+    exit 0
+    ;;
+
+  # --- FALLBACK ---
+  *)
+    file --dereference --brief "$FILE"
+    echo "------------------------------------------------"
+    hexdump -C "$FILE" | head -n 100
+    exit 0
+    ;;
+esac
+
+# Always exit cleanly
+exit 0
diff --git a/modules/tools/lf/default.nix b/modules/tools/lf/default.nix
index 1b61fd8..be6fc2c 100644
--- a/modules/tools/lf/default.nix
+++ b/modules/tools/lf/default.nix
@@ -35,16 +35,15 @@
         info = "size";
         sortby = "natural";
         dirfirst = true;
+
+        cleaner = lib.getExe config.scripts.file-preview-clean;
       };
 
       previewer = {
-        source = lib.getExe' pkgs.ctpv "ctpv";
+        source = lib.getExe config.scripts.file-preview;
       };
 
       extraConfig = ''
-        &${lib.getExe' pkgs.ctpv "ctpv"} -s $id
-        cmd on-quit %${lib.getExe' pkgs.ctpv "ctpv"} -e $id
-        set cleaner ${lib.getExe' pkgs.ctpv "ctpvclear"}
         ${builtins.readFile ./lfrc}
       '';
     };