From a77dc27cbbdb26298bf43ffebdb51d2a033946cc Mon Sep 17 00:00:00 2001
From: TiynGER <kantemarten@googlemail.com>
Date: Sat, 23 Nov 2019 11:02:54 +0100
Subject: [PATCH] adding pdf and image preview to vifm

---
 .config/profile         |  4 ++--
 .config/vifm/vifmrc     | 14 +++++++++--
 .local/bin/vifm/vifmimg | 53 +++++++++++++++++++++++++++++++++++++++++
 .local/bin/vifm/vifmrun | 15 ++++++++++++
 4 files changed, 82 insertions(+), 4 deletions(-)
 create mode 100644 .local/bin/vifm/vifmimg
 create mode 100644 .local/bin/vifm/vifmrun

diff --git a/.config/profile b/.config/profile
index 46dc920..2ca2b5e 100644
--- a/.config/profile
+++ b/.config/profile
@@ -7,7 +7,7 @@ export EDITOR="nvim"
 export TERMINAL="st"
 export BROWSER="firefox"
 export READER="zathura"
-export FILE="vifm"
+export FILE="vifmrun"
 export SUDO_ASKPASS="$HOME/.local/bin/tools/dmenupass"
 export NOTMUCH_CONFIG="$HOME/.config/notmuch-config"
 export GTK2_RC_FILES="$HOME/.config/gtk-2.0/gtkrc-2.0"
@@ -18,7 +18,7 @@ export VIDEO="mpv"
 export AUDIO="mpv"
 export TABLE="sc-im"
 export IMAGE="sxiv"
-export LATEX="vim"
+export LATEX="nvim"
 export MAIL="thunderbird"
 export MUSIC="ncmpcpp"
 
diff --git a/.config/vifm/vifmrc b/.config/vifm/vifmrc
index 6a2ee3f..db45627 100644
--- a/.config/vifm/vifmrc
+++ b/.config/vifm/vifmrc
@@ -172,7 +172,11 @@ command! reload :write | restart
 
 " Pdf
 filextype *.pdf zathura %c %i &, apvlv %c, xpdf %c
-fileviewer *.pdf pdftotext -nopgbrk %c -
+fileviewer *.pdf
+		\ vifmimg pdfpreview %px %py %pw %ph %c
+		\ %pc
+		\ vifmimg clear
+		"\ pdftotext -nopgbrk %c -
 
 " PostScript
 filextype *.ps,*.eps,*.ps.gz
@@ -238,7 +242,13 @@ filextype *.bmp,*.jpg,*.jpeg,*.png,*.gif,*.xpm
         \ {View in shotwell}
         \ shotwell,
 fileviewer *.bmp,*.jpg,*.jpeg,*.png,*.gif,*.xpm
-         \ identify %f
+         \ vifmimg draw %px %py %pw %ph %c
+		 \ %pc
+		 \ vifmimg clear
+fileviewer *.gif
+		\ vifmimg gifpreview %px %py %pw %ph %c
+		\ %pc
+		\vifmimg clear
 
 " OpenRaster
 filextype *.ora
diff --git a/.local/bin/vifm/vifmimg b/.local/bin/vifm/vifmimg
new file mode 100644
index 0000000..e5d8763
--- /dev/null
+++ b/.local/bin/vifm/vifmimg
@@ -0,0 +1,53 @@
+#!/usr/bin/env bash
+readonly ID_PREVIEW="preview"
+
+#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.
+
+if [ -e "$FIFO_UEBERZUG" ]; then
+    if [[ "$1" == "draw" ]]; then
+        declare -p -A cmd=([action]=add [identifier]="$ID_PREVIEW"
+                           [x]="$2" [y]="$3" [width]="$4" [height]="$5" \
+                           [path]="${PWD}/$6") \
+            > "$FIFO_UEBERZUG"
+
+    elif [[ "$1" == "videopreview" ]]; then
+        echo -e "Loading preview..\nFile: $6"
+        [[ ! -d "/tmp${PWD}/$6/" ]] && mkdir -p "/tmp${PWD}/$6/"
+        [[ ! -f "/tmp${PWD}/$6.png" ]] && ffmpegthumbnailer -i "${PWD}/$6" -o "/tmp${PWD}/$6.png" -s 0 -q 10
+        declare -p -A cmd=([action]=add [identifier]="$ID_PREVIEW"
+                           [x]="$2" [y]="$3" [width]="$4" [height]="$5" \
+                           [path]="/tmp${PWD}/$6.png") \
+            > "$FIFO_UEBERZUG"
+
+    elif [[ "$1" == "gifpreview" ]]; then
+        echo -e "Loading preview..\nFile: $6"
+        [[ ! -d "/tmp${PWD}/$6/" ]] && mkdir -p "/tmp${PWD}/$6/" && convert -coalesce "${PWD}/$6" "/tmp${PWD}/$6/$6.png"
+        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
+
+    elif [[ "$1" == "pdfpreview" ]]; then
+        echo -e "Loading preview..\nFile: $6"
+        [[ ! -d "/tmp${PWD}/$6/" ]] && mkdir -p "/tmp${PWD}/$6/"
+        [[ ! -f "/tmp${PWD}/$6.png" ]] && pdftoppm -png -singlefile "$6" "/tmp${PWD}/$6"
+        declare -p -A cmd=([action]=add [identifier]="$ID_PREVIEW"
+                           [x]="$2" [y]="$3" [width]="$4" [height]="$5" \
+                           [path]="/tmp${PWD}/$6.png") \
+            > "$FIFO_UEBERZUG"
+
+    elif [[ "$1" == "clear" ]]; then
+        declare -p -A cmd=([action]=remove [identifier]="$ID_PREVIEW") \
+            > "$FIFO_UEBERZUG"
+        [[ ! -z $AUTO_REMOVE ]] && [[ -f "/tmp${PWD}/$6.png" ]] && rm -f "/tmp${PWD}/$6.png"
+        [[ ! -z $AUTO_REMOVE ]] && [[ -d "/tmp${PWD}/$6/" ]] && rm -rf "/tmp${PWD}/$6/"
+
+    fi
+fi
diff --git a/.local/bin/vifm/vifmrun b/.local/bin/vifm/vifmrun
new file mode 100644
index 0000000..9eda32a
--- /dev/null
+++ b/.local/bin/vifm/vifmrun
@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+export FIFO_UEBERZUG="/tmp/vifm-ueberzug-${PPID}"
+
+function cleanup {
+    rm "$FIFO_UEBERZUG" 2>/dev/null
+    pkill -P $$ 2>/dev/null
+}
+
+rm "$FIFO_UEBERZUG" 2>/dev/null
+mkfifo "$FIFO_UEBERZUG"
+trap cleanup EXIT
+tail --follow "$FIFO_UEBERZUG" | ueberzug layer --silent --parser bash &
+
+vifm
+cleanup