Enable vifm image previews

.config/shell/rc.d/vifm-to-vm.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+# Check for existence of vifm command. If found, substitute vifm with it.
+type vifm >/dev/null 2>&1 && alias vm=vifm
+
+# Check for existence of vifmrun command. If found, substitute vifm with it.
+type vifmrun >/dev/null 2>&1 && alias vifm=vifmrun

.config/vifm/vifmrc

@@ -241,7 +241,9 @@ filextype *.bmp,*.jpg,*.jpeg,*.png,*.gif,*.xpm
         \ {View in shotwell}
         \ feh,
 fileviewer *.bmp,*.jpg,*.jpeg,*.png,*.gif,*.xpm
-         \ convert -identify %f -verbose /dev/null
+         \ vifmimg draw %px %py %pw %ph %c
+         \ %pc
+         \ vifmimg clear
 
 " OpenRaster
 filextype *.ora

.local/bin/vifmimg

@@ -0,0 +1,154 @@
+#!/usr/bin/env bash
+readonly ID_PREVIEW="preview"
+
+#PLAY_GIF="yes"
+# By enabling this option the GIF will be animated, by leaving it commented like it
+# is now will make the gif previews behave the same way as video previews.
+
+#AUTO_REMOVE="yes"
+# By enabling this option the script will remove the preview file after it is drawn
+# and by doing so the preview will always be up-to-date with the file.
+# This however, requires more CPU and therefore affects the overall performance.
+
+# The messy code below is for moving pages in pdf files in the vifm file preview by
+# utilizing the < and > keys which will be bound to `vifmimg inc` or `vifmimg dec`.
+PDF_PAGE_CONFIG="$HOME/.config/vifm/vifmimgpdfpage"
+PDF_FILE_CONFIG="$HOME/.config/vifm/vifmimgpdffile"
+PDF_PAGE=1
+PDF_FILE=""
+# Initialize the variables and required files
+[[ -f "$PDF_PAGE_CONFIG" ]] && PDF_PAGE=$(cat $PDF_PAGE_CONFIG) || touch $PDF_PAGE_CONFIG
+[[ -f "$PDF_FILE_CONFIG" ]] && PDF_FILE=$(cat $PDF_FILE_CONFIG) || touch $PDF_FILE_CONFIG
+
+
+# Create temporary working directory if the directory structure doesn't exist
+if [[ ! -d "/tmp$PWD/" ]]; then
+    mkdir -p "/tmp$PWD/"
+fi
+
+function inc() {
+	VAL="$(cat $PDF_PAGE_CONFIG)"
+	echo "$(expr $VAL + 1)" > $PDF_PAGE_CONFIG
+}
+
+function dec() {
+	VAL="$(cat $PDF_PAGE_CONFIG)"
+	echo "$(expr $VAL - 1)" > $PDF_PAGE_CONFIG
+	if [[ $VAL -le 0 ]]; then
+		echo 0 > $PDF_PAGE_CONFIG
+	fi
+}
+
+function previewclear() {
+    declare -p -A cmd=([action]=remove [identifier]="$ID_PREVIEW") \
+        > "$FIFO_UEBERZUG"
+}
+
+function fileclean() {
+    if [[ -f "/tmp$PWD/$6.png" ]]; then
+        rm -f "/tmp$PWD/$6.png"
+    elif  [[ -d "/tmp$PWD/$6/" ]]; then
+        rm -rf "/tmp$PWD/$6/"
+    fi
+}
+
+function preview() {
+    declare -p -A cmd=([action]=add [identifier]="$ID_PREVIEW"
+        [x]="$2" [y]="$3" [width]="$4" [height]="$5" \
+        [path]="$PWD/$6") \
+        > "$FIFO_UEBERZUG"
+}
+
+function previewvideo() {
+    if [[ ! -f "/tmp$PWD/$6.png" ]]; then
+        ffmpegthumbnailer -i "$PWD/$6" -o "/tmp$PWD/$6.png" -s 0 -q 10
+    fi
+    declare -p -A cmd=([action]=add [identifier]="$ID_PREVIEW"
+        [x]="$2" [y]="$3" [width]="$4" [height]="$5" \
+        [path]="/tmp$PWD/$6.png") \
+        > "$FIFO_UEBERZUG"
+}
+
+function previewepub() {
+    if [[ ! -f "/tmp$PWD/$6.png" ]]; then
+        epub-thumbnailer "$6" "/tmp$PWD/$6.png" 1024
+    fi
+    declare -p -A cmd=([action]=add [identifier]="$ID_PREVIEW"
+        [x]="$2" [y]="$3" [width]="$4" [height]="$5" \
+        [path]="/tmp$PWD/$6.png") \
+        > "$FIFO_UEBERZUG"
+}
+
+function previewgif() {
+    if [[ ! -d "/tmp$PWD/$6/" ]]; then
+        mkdir -p "/tmp$PWD/$6/"
+        convert -coalesce "$PWD/$6" "/tmp$PWD/$6/$6.png"
+    fi
+    if [[ ! -z "$PLAY_GIF" ]]; then
+        for frame in $(ls -1 /tmp$PWD/$6/$6*.png | sort -V); do
+            declare -p -A cmd=([action]=add [identifier]="$ID_PREVIEW"
+                [x]="$2" [y]="$3" [width]="$4" [height]="$5" \
+                [path]="$frame") \
+                > "$FIFO_UEBERZUG"
+            # Sleep between frames to make the animation smooth.
+            sleep .07
+        done
+    else
+            declare -p -A cmd=([action]=add [identifier]="$ID_PREVIEW"
+                [x]="$2" [y]="$3" [width]="$4" [height]="$5" \
+                [path]="/tmp$PWD/$6/$6-0.png") \
+                > "$FIFO_UEBERZUG"
+    fi
+}
+
+function previewpdf() {
+    if [[ ! "$6" == "$PDF_FILE" ]]; then
+        PDF_PAGE=1
+        echo 1 > $PDF_PAGE_CONFIG
+        rm -f "/tmp$PWD/$6.png"
+    fi
+
+    if [[ ! "$PDF_PAGE" == "1" ]] && [[ -f "/tmp$PWD/$6.png" ]]; then
+        rm -f "/tmp$PWD/$6.png"
+    fi
+
+    if [[ ! -f "/tmp$PWD/$6.png" ]]; then
+        pdftoppm -png -f $PDF_PAGE -singlefile "$6" "/tmp$PWD/$6"
+    fi
+    echo "$6" > $PDF_FILE_CONFIG
+
+    declare -p -A cmd=([action]=add [identifier]="$ID_PREVIEW"
+        [x]="$2" [y]="$3" [width]="$4" [height]="$5" \
+        [path]="/tmp$PWD/$6.png") \
+        > "$FIFO_UEBERZUG"
+}
+
+
+function previewmagick() {
+    if [[ ! -f "/tmp$PWD/$6.png" ]]; then
+        convert -thumbnail $(identify -format "%wx%h" "$6") "$PWD/$6" "/tmp$PWD/$6.png"
+    fi
+    declare -p -A cmd=([action]=add [identifier]="$ID_PREVIEW"
+        [x]="$2" [y]="$3" [width]="$4" [height]="$5" \
+        [path]="/tmp$PWD/$6.png") \
+        > "$FIFO_UEBERZUG"
+}
+
+
+
+function main() {
+    case "$1" in
+        "inc") inc "$@" ;;
+        "dec") dec "$@" ;;
+        "clear") previewclear "$@" ;;
+        "clean") fileclean "$@" ;;
+        "draw") preview "$@" ;;
+        "videopreview") previewvideo "$@" ;;
+        "epubpreview") previewepub "$@" ;;
+        "gifpreview") previewgif "$@" ;;
+        "pdfpreview") previewpdf "$@" ;;
+        "magickpreview") previewmagick "$@" ;;
+        "*") echo "Unknown command: '$@'" ;;
+    esac
+}
+main "$@"

.local/bin/vifmrun

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+export FIFO_UEBERZUG="/tmp/vifm-ueberzug-${PPID}"
+
+function cleanup {
+    rm "$FIFO_UEBERZUG" 2>/dev/null
+    pkill -P $$ 2>/dev/null
+}
+pkill -P $$ 2>/dev/null
+rm "$FIFO_UEBERZUG" 2>/dev/null
+mkfifo "$FIFO_UEBERZUG" >/dev/null
+trap cleanup EXIT 2>/dev/null
+tail --follow "$FIFO_UEBERZUG" | ueberzug layer --silent --parser bash 2>&1 >/dev/null &
+
+vifm
+cleanup