Change location of example scripts (#86)

* Use DOCPREFIX similar to MANPREFIX

Co-authored-by: NRK <nrk@disroot.org>

examples/image-info

@@ -0,0 +1,20 @@
+#!/bin/sh
+
+# Example for $XDG_CONFIG_HOME/nsxiv/exec/image-info
+# Called by nsxiv(1) whenever an image gets loaded.
+# The output is displayed in nsxiv's status bar.
+# Arguments:
+#   $1: path to image file
+#   $2: image width
+#   $3: image height
+
+s="  " # field separator
+
+exec 2>/dev/null
+
+filename=$(basename -- "$1")
+filesize=$(du -Hh -- "$1" | cut -f 1)
+geometry="${2}x${3}"
+
+echo "${filesize}${s}${geometry}${s}${filename}"
+

examples/key-handler

@@ -0,0 +1,35 @@
+#!/bin/sh
+
+# Example for $XDG_CONFIG_HOME/nsxiv/exec/key-handler
+# Called by nsxiv(1) after the external prefix key (C-x by default) is pressed.
+# The next key combo is passed as its first argument. Passed via stdin are the
+# images to act upon, one path per line: all marked images, if in thumbnail
+# mode and at least one image has been marked, otherwise the current image.
+# nsxiv(1) blocks until this script terminates. It then checks which images
+# have been modified and reloads them.
+
+# The key combo argument has the following form: "[C-][M-][S-]KEY",
+# where C/M/S indicate Ctrl/Meta(Alt)/Shift modifier states and KEY is the X
+# keysym as listed in /usr/include/X11/keysymdef.h without the "XK_" prefix.
+
+rotate() {
+	degree="$1"
+	tr '\n' '\0' | xargs -0 realpath | sort | uniq | while read file; do
+		case "$(file -b -i "$file")" in
+		image/jpeg*) jpegtran -rotate "$degree" -copy all -outfile "$file" "$file" ;;
+		*)           mogrify  -rotate "$degree" "$file" ;;
+		esac
+	done
+}
+
+case "$1" in
+"C-x")      xclip -in -filter | tr '\n' ' ' | xclip -in -selection clipboard ;;
+"C-c")      while read file; do xclip -selection clipboard -target image/png "$file"; done ;;
+"C-e")      while read file; do urxvt -bg "#444" -fg "#eee" -sl 0 -title "$file" -e sh -c "exiv2 pr -q -pa '$file' | less" & done ;;
+"C-g")      tr '\n' '\0' | xargs -0 gimp & ;;
+"C-r")      while read file; do rawtherapee "$file" & done ;;
+"C-comma")  rotate 270 ;;
+"C-period") rotate  90 ;;
+"C-slash")  rotate 180 ;;
+esac
+