qutebrowser: Add maps for viewing images in nsxiv

Added two mappings: localleader+i and localleader+I (localleader being ,
in my case) to open single images or galleries in nsxiv.

The maps make use of nsxiv-rifle and mirror the setup for opening video
in mpv with +m/+M where capital letters open the current page and small
ones let you follow a link.

qutebrowser/.config/qutebrowser/maps.py

@@ -49,6 +49,8 @@ config.bind(leader + "tV", "set tabs.position left")
 # bind mpv to play the current page/links, using a single instance which queues the next link passed
 config.bind(lleader + "M", "spawn umpv {url}")
 config.bind(lleader + "m", "hint links spawn umpv {hint-url}")
+config.bind(lleader + "I", "spawn nsxiv-rifle {url}")
+config.bind(lleader + "i", "hint --rapid links spawn nsxiv-rifle {hint-url}")
 
 # bind youtube-dl to download the current page/links
 config.bind(lleader + "dM", "spawn vidl {url}")

scripts/.local/bin/nsxiv-rifle

@@ -0,0 +1,75 @@
+#!/usr/bin/env sh
+#
+# Advanced nsxiv url opening script.
+#
+# Can open remote urls of individual images, galleries, and local files at the same time.
+# Uses gallery-dl for remote gallery opening - so if gallery-dl can open it, so can nsxiv.
+#
+# Usage: simply add multiple urls/paths as arguments.
+# nsxiv-rifle "https://linkto.my/image.png" my/local/relative-path.jpg /home/absolute.gif
+
+cache_dir="$(mktemp -d)"
+
+die() {
+    [ -n "$1" ] && printf '%s\n' "$*" >&2
+    exit 1
+}
+
+cleanup() {
+    rm -f -- "$cache_dir"/*
+}
+
+from_local() {
+    fpath="$(realpath "$1")"
+    ln -s "$fpath" "$cache_dir"
+}
+
+# invokes single image downloading or gallery downloading depending on content type
+from_remote() {
+    link="$(dereference "$1")"
+    if curl -sLI "$link" | grep -i '^Content-Type:' | grep -q image; then
+        get_single_image "$link"
+    else
+        get_gallery "$link"
+    fi
+}
+
+get_gallery() {
+    command -v gallery-dl 1>/dev/null 2>&1 || return
+    gallery-dl -q -D "$cache_dir" "$1"
+}
+
+get_single_image() {
+    pwd="$PWD"
+    cd "$cache_dir" && curl -sSLO "$1"
+    cd "$pwd" || exit 1
+}
+
+# unaliases urls which will not be downloaded correctly otherwise
+dereference() {
+    # teddit
+    if echo "$1" | grep -qe "https\?://w\?w\?w\?\.\?teddit\.net.\+"; then
+        echo "$1" | sed -e 's|^.*pics/w:null_\(.\+\)$|https://i.redd.it/\1|'
+    else
+        echo "$1"
+    fi
+}
+
+### main ###
+command -v nsxiv 1>/dev/null 2>&1 || die "Requires nsxiv installed"
+
+[ -z "$1" ] && nsxiv
+trap cleanup EXIT
+[ -d "$cache_dir" ] || mkdir -p -- "$cache_dir" || die
+im_number=1
+while [ -n "$1" ]; do
+    case "$1" in
+    *://*.*) from_remote "$1" ;;
+    *) from_local "$1" ;;
+    esac
+    im_number=$((im_number + 1))
+    shift
+done
+
+[ "$(find "$cache_dir" -type f -print | wc -l)" -ne 0 ] &&
+    nsxiv -p "$cache_dir"

sh/.config/sh/alias

@@ -93,6 +93,17 @@ if exist vifm; then
     alias vmm='vifm ${PWD}'
 fi
 
+# nsxiv image viewer
+if exist nsxiv; then
+    if exist nsxiv-rifle; then
+        alias iv=nsxiv-rifle
+    else
+        alias iv=nsxiv
+    fi
+elif exist sxiv; then
+    alias iv=sxiv
+fi
+
 # python
 if exist ptipython; then
     alias py=ptipython