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Table of Contents

displayselect - Select Screen

Script taken from Luke Smith. 

twoscreen() { # If multi-monitor is selected and there are two screens.

    mirror=$(printf "no\\nyes" | dmenu -i -p "Mirror displays?")
    # Mirror displays using native resolution of external display and a scaled
    # version for the internal display
    if [ "$mirror" = "yes" ]; then
        external=$(echo "$screens" | dmenu -i -p "Optimize resolution for:")
        internal=$(echo "$screens" | grep -v "$external")

        res_external=$(xrandr --query | sed -n "/^$external/,/\+/p" | \
                           tail -n 1 | awk '{print $1}')
        res_internal=$(xrandr --query | sed -n "/^$internal/,/\+/p" | \
                           tail -n 1 | awk '{print $1}')

        res_ext_x=$(echo $res_external | sed 's/x.*//')
        res_ext_y=$(echo $res_external | sed 's/.*x//')
        res_int_x=$(echo $res_internal | sed 's/x.*//')
        res_int_y=$(echo $res_internal | sed 's/.*x//')

        scale_x=$(echo "$res_ext_x / $res_int_x" | bc -l)
        scale_y=$(echo "$res_ext_y / $res_int_y" | bc -l)

        xrandr --output "$external" --auto --scale 1.0x1.0 \
               --output "$internal" --auto --same-as "$external" \
               --scale "$scale_x"x"$scale_y"
    else

        primary=$(echo "$screens" | dmenu -i -p "Select primary display:")
        secondary=$(echo "$screens" | grep -v "$primary")
        direction=$(printf "left\\nright" | dmenu -i -p "What side of $primary should $secondary be on?")
        xrandr --output "$primary" --auto --scale 1.0x1.0 --output "$secondary" --"$direction"-of "$primary" --auto --scale 1.0x1.0
    fi
}

morescreen() { # If multi-monitor is selected and there are more than two screens.
    primary=$(echo "$screens" | dmenu -i -p "Select primary display:")
    secondary=$(echo "$screens" | grep -v "$primary" | dmenu -i -p "Select secondary display:")
    direction=$(printf "left\\nright" | dmenu -i -p "What side of $primary should $secondary be on?")
    tertiary=$(echo "$screens" | grep -v "$primary" | grep -v "$secondary" | dmenu -i -p "Select third display:")
    xrandr --output "$primary" --auto --output "$secondary" --"$direction"-of "$primary" --auto --output "$tertiary" --"$(printf "left\\nright" | grep -v "$direction")"-of "$primary" --auto
}

multimon() { # Multi-monitor handler.
    case "$(echo "$screens" | wc -l)" in
        1) xrandr $(echo "$allposs" | grep -v "$screens" | awk '{print "--output", $1, "--off"}' | tr '\n' ' ') ;;
        2) twoscreen ;;
        *) morescreen ;;
    esac ;}

# Get all possible displays
allposs=$(xrandr -q | grep "connected")

# Get all connected screens.
screens=$(echo "$allposs" | grep " connected" | awk '{print $1}')

# Get user choice including multi-monitor and manual selection:
chosen=$(printf "%s\\ncancel\\nmulti-monitor\\nmanual selection" "$screens" | dmenu -i -p "Select display arangement:") &&
    case "$chosen" in
        "cancel") exit ;;
        "manual selection") arandr ; exit ;;
        "multi-monitor") multimon ;;
        *) xrandr --output "$chosen" --auto --scale 1.0x1.0 $(echo "$allposs" | grep -v "$chosen" | awk '{print "--output", $1, "--off"}' | tr '\n' ' ') ;;
    esac

$HOME/.config/polybar/scripts/launch.sh # restart polybar
pgrep -x dunst >/dev/null && killall dunst && setsid dunst & # Restart dunst to ensure proper location on screen

vpntoggle - Connect to VPN using NordVPN

if [[ $(nordvpn status) == *"Connected"* ]]; then
  nordvpn disconnect && dunstify --replace=23198 "VPN" "Disconnected";
else
  country=`cat ~/.local/data/nordvpn_countries.txt | sed 's/\s*\t\s*/ /g ; s/\s/\n/g ; s/_/ /g ; /^[a-zA-Z]/!d ; s/\(.*\)/\L\1/' | rofi -i -dmenu | sed 's/\s/_/g'`;
  dunstify --replace=23198 "VPN" "Connecting to $country...";
  nordvpn connect $country && dunstify --replace=23198 "VPN" "Connected to $country";
fi

bukurun - Open link from Buku

_rofi () {
    rofi -dmenu -i -no-levenshtein-sort -width 1000 "$@"
}

# display settings
display_type=1
max_str_width=80

# keybindings
switch_view="Alt+Tab"
new_bookmark="Alt+n"
actions="Alt+a"
edit="Alt+e"
delete="Alt+d"

# colors
help_color="#334433"

# source global config
if [[ -f /etc/buku_run.config ]]
then
    source /etc/buku_run.config
fi

# source local config:
if [[ -z $XDG_CONFIG_DIR ]]
then
    if [[ -f $HOME/.config/buku_run/config ]]
    then
        source $HOME/.config/buku_run/config
    else
        echo "User config file \'~/.config/buku_run/config\' not found. using global config"
    fi
else
    if [[ -f "${XDG_CONFIG_DIR}/buku_run/config" ]]
    then
        source "${XDG_CONFIG_DIR}/buku_run/config"
    else
        echo "User config file \'~/.config/buku_run/config\' not found. using global config"
    fi
fi


main () {
    HELP="Welcome to Buku. Use <span color='${help_color}'>${new_bookmark}</span> to add a new Bookmark
Use <span color='${help_color}'>${switch_view}</span> to switch View. <span color='${help_color}'>${actions}</span> for actions"
    if [[ $mode == "bookmarks" ]]; then
        content=$(parseBuku)
        menu=$(echo "${content}" | _rofi -p '> ' -filter "${filter}" -mesg "${HELP}" -kb-custom-1 "${new_bookmark}" -kb-custom-2 "${switch_view}" -kb-custom-3 "${actions}" -kb-custom-4 "${edit}" -kb-custom-5 "${delete}")
    elif [[ $mode == "tags" ]]; then
        menu=$(buku --np --st | awk '{$NF=""; print $0}' | cut -d ' ' -f2-  | _rofi -p '> ' -mesg "${HELP}" -kb-custom-1 "${new_bookmark}" -kb-custom-2 "${switch_view}" -kb-custom-3 "${actions}" -kb-custom-4 "${edit}" -kb-custom-5 "${delete}")
    fi
    val=$?
    if [[ $val -eq 1 ]]; then
        exit
    elif [[ $val -eq 12 ]]; then
        optionsMenu
    elif [[ $val -eq 10 ]]; then
        addMark
    elif [[ $val -eq 14 ]]; then
        deleteMenu
    elif [[ $val -eq 13 ]]; then
        editMenu
    elif [[ $val -eq 11 ]]; then
        if [[ $mode == "bookmarks" ]]; then
            export mode="tags"
            mode=tags main
        elif [[ $mode == "tags" ]]; then
            export mode="bookmarks"
            mode=bookmarks main
        fi
    elif [[ $val -eq 0 ]]; then
        if [[ $mode == "bookmarks" ]]; then
            id=$(getId "$content" "$menu")
            for bm in ${id}; do
                buku -o "${bm}"
            done
        elif [[ $mode == "tags" ]]; then
            filter="${menu}" mode="bookmarks" main
        fi
    fi
}

optionsMenu () {
    if [[ $mode == "bookmarks" ]]; then
        askmenu=$(echo -e "< Return\n---\n1. Edit\n2. Delete" | _rofi -p '> ' -mesg "Choose Action for bookmark")
        val=$?
        if [[ $val -eq 1 ]]; then
            exit
        elif [[ $val -eq 0 ]]; then
            if [[ $askmenu == "< Return" ]]; then
                export mode=bookmarks
                main
            elif [[ $askmenu == "1. Edit" ]]; then
                editMenu
            elif [[ $askmenu == "2. Delete" ]]; then
                deleteMenu
            fi
        fi
    elif [[ $mode == "tags" ]]; then
        askmenu=$(echo -e "< Return\n---\n1. Replace Tag\n2. Delete Tag" | _rofi -p '> ' -mesg "Choose Action for tag \"${menu}\"")
        val=$?
        if [[ $val -eq 1 ]]; then
            exit
        elif [[ $val -eq 0 ]]; then
            if [[ $askmenu == "< Return" ]]; then
                export mode=tags
                main
            elif [[ $askmenu == "1. Replace Tag" ]]; then
                newtag=$(echo | _rofi -p '> ' -mesg "Enter new tag name for tag \"${menu}\"")
                val=$?
                if [[ $val -eq 1 ]]; then
                    exit
                elif [[ $val -eq 0 ]]; then
                    if [[ $newtag == "" ]]; then
                        mode=tags main
                    else
                        buku -r "${menu}" "${newtag}"
                        mode=tags main
                    fi
                fi
            elif [[ $askmenu == "2. Delete Tag" ]]; then
                delask=$(echo -e "1. Yes\n2. No" | _rofi -p '> ' -mesg "Really delete tag?")
                val=$?
                if [[ $val -eq 1 ]]; then
                    exit
                elif [[ $val -eq 0 ]]; then
                    if [[ $delask == "1. Yes" ]]; then
                        buku -r "${menu}"
                        mode=tags main
                    elif [[ $delask == "2. No" ]]; then
                        mode=tags main
                    fi
                fi
            fi
        fi
    fi
}

deleteMenu () {
    id=$(getId "$content" "$menu")
    delask=$(echo -e "1. Yes\n2. No" | _rofi -p '> ' -mesg "Really delete bookmark?")
    val=$?
    if [[ $val -eq 1 ]]; then
        exit
    elif [[ $val -eq 0 ]]; then
        if [[ $delask == "1. Yes" ]]; then
            buku -d ${id} --tacit
            mode=bookmarks main
        elif [[ $delask == "2. No" ]]; then
            optionsMenu
        fi
    fi
}

editMenu () {
    id=$(getId "$content" "$menu")
    title="$(getTitleFromId $id)"
    bookmark="$(getUrlFromId $id)"
    tags="$(getTagsFromId $id)"
    content=$(echo -e "1. title: $title\n2. url: $bookmark\n3. tags: $tags")
    editmenu=$(echo -e "< Return\n---\n${content}" | _rofi -p '> ')
    val=$?
    if [[ $val -eq 1 ]]; then
        exit
    elif [[ $val -eq 0 ]]; then
        if [[ $editmenu == "< Return" ]]; then
            main
        elif [[ $editmenu == "tags: NOTAG" ]]; then
            addTags --update
        elif [[ $editmenu =~ tags:* ]]; then
            tags="${tags}" editTags
        elif [[ $editmenu =~ url:* ]]; then
            editBookmark
        elif [[ $editmenu =~ title:* ]]; then
            editTitle
        fi
    fi
}

editTags () {
    edittagsmenu=$(echo | _rofi -filter "${tags}" -p '> ' -mesg "Edit Tags and hit Enter")
    val=$?
    if [[ $val -eq 1 ]]; then
        exit
    elif [[ $val -eq 0 ]]; then
        buku -u ${id} --tag "${edittagsmenu}"
    fi
    mode=bookmarks main
}

editBookmark () {
    bmarkmenu=$(echo "" | _rofi -p "> " -filter "${bookmark}" -mesg "Edit Bookmark and hit Enter")
    val=$?
    if [[ $val -eq 1 ]]; then
        exit
    elif [[ $val -eq 0 ]]; then
        if [[ $bmarkmenu == "http"* ]]; then
            buku -u "${id}" --url "${bmarkmenu}"
        else
            echo "" | rofi -e "Not a valid URI, Make sure URLs start with http"
            editBookmark
        fi
    fi
    mode=bookmarks main
}

editTitle () {
    titlemenu=$(echo "" | _rofi -p "> " -filter "${title}" -mesg "Edit Title and hit Enter")
    val=$?
    if [[ $val -eq 1 ]]; then
        exit
    elif [[ $val -eq 0 ]]; then
        buku -u "${id}" --title "${titlemenu}"
    fi
    mode=bookmarks main
}

addMark () {
    inserturl=$(echo -e "$(xclip -o)" | _rofi -p '> ' -mesg "Use URL below or type manually")
    val=$?
    if [[ $val -eq 1 ]]; then
        exit
    elif [[ $val -eq 0 ]]; then
        addTags
    fi
}

addTags () {
    inserttags=$(buku --np --st | awk '{$NF=""; print $0}' | cut -d ' ' -f2- | _rofi -p '> ' -mesg "Add some tags. Separate tags with ', '")
    val=$?
    if [[ $val -eq 1 ]]; then
        exit
    elif [[ $val -eq 0 ]]; then
        if [[ $(echo "${inserttags}" | wc -l) -gt 1 ]]; then
            taglist=$(echo "${inserttags}" | tr '\n' ',')
            tags=()
            for tag in $taglist; do
                tags+=("$tag")
            done
        else
            tags=${inserttags}
        fi
        if [[ $1 == "--update" ]]; then
            buku -u "${id}" --tag ${tags}
        else
            buku -a ${inserturl} ${tags}
        fi
    fi
}

parseBuku () {
    echo "$(buku --nc -p | gawk -v max="$max_str_width" -v type="$display_type" '
BEGIN {
  RS=""
  FS="\n"
}
{
  if ($3 == "")
    $3 = " # NOTAG"
  id = gensub(/([0-9]+)\.(.*)/, "\\1", "g", $1)
  url = substr(gensub(/\s+> (.*)/, "\\1", "g", $2),0,max)
  tags = gensub(/\s+# (.*)/, "\\1", "g", $3)
  title = substr(gensub(/[0-9]+\.\s*(.*)/, "\\1", "g", $1),0,max)

  if (type == 1)
    print id "\t" url "\t" tags
  else
    print id "\t" title "\t" tags
    if (type == 3)
      print " \t" url "\t "
  print ""
}
' | column -t -s $'\t')"
}

getId () {
    id=$(echo "${2%% *}")
    if [ -z "$id" ]; then
        prev=""
        IFS=$'\n'
        for line in $1; do
            if [ "$2" = "$line" ]; then
                id=$(echo "${prev%% *}")
                break
            else
                prev="$line"
            fi
        done
    fi
    echo $id
}

getTitleFromId () {
    echo "$(buku --nc -p $1 | gawk '
  BEGIN {
    RS=""
    FS="\n"
  }
  {
    print gensub(/[0-9]+\.\s*(.*)/, "\\1", "g", $1)
  }
  ')"
}

getUrlFromId () {
    echo "$(buku --nc -p $1 | gawk '
  BEGIN {
    RS=""
    FS="\n"
  }
  {
    print gensub(/\s+> (.*)/, "\\1", "g", $2)
  }
  ')"
}

getTagsFromId () {
    echo "$(buku --nc -p $1 | gawk '
  BEGIN {
    RS=""
    FS="\n"
  }
  {
    print gensub(/\s+# (.*)/, "\\1", "g", $3)
  }
  ')"
}

mode=bookmarks main

i3exit - Manage lock, suspend, reboot, …

option=$(echo -e "Lock\nExit\nLogout\nSuspend\nHibernate\nReboot\nShutdown" | rofi -i -dmenu)

case "$option" in
    "Lock")
        ~/.local/bin/lockscreen
        ;;
    "Exit")
        dm-tool switch-to-greeter
        ;;
    "Logout")
        loginctl terminate-session `loginctl session-status | head -n 1 | awk '{print $1}'`
        ;;
    "Suspend")
        systemctl suspend && ~/.local/bin/lockscreen
        ;;
    "Hibernate")
        systemctl hibernate && ~/.local/bin/lockscreen
        ;;
    "Reboot")
        systemctl reboot
        ;;
    "Shutdown")
        systemctl poweroff
        ;;
    *)
        echo "== ! i3exit: missing or invalid argument ! =="
        exit 2
esac

exit 0

askpass-rofi - GUI prompt for passwords

Take password prompt from STDIN, print password to STDOUT. The sed piece just removes the colon from the provided prompt: rofi -p already gives us a colon 

rofi -dmenu \
     -password \
     -no-fixed-num-lines \
     -p "$(printf "$1" | sed s/://)"

screenshot - Take Screenshot

status=$(echo -e "All\nGUI\nSelection\nCropped\nCopy\nShadow\nActive" | rofi -i -dmenu -p "Type")
if [ -z "$status" ]; then
  exit;
fi

name=$(echo -e "screenshot-$(date +"%m-%d-%y_%H-%M-%S")" | rofi -i -dmenu -p "Filename")
if [ -z "$name" ]; then
  exit;
fi

case "$status" in
    "All")
        maim ~/Pictures/$name.png ;;
    "GUI")
        flameshot gui -r > ~/Pictures/$name.png ;;
    "Selection")
        maim -s ~/Pictures/$name.png ;;
    "Cropped")
        maim -s ~/Pictures/$name.png && convert -trim ~/Pictures/$name.png ~/Pictures/$name.png;;
    "Copy")
        maim -s | xclip -selection clipboard -t image/png ;;
    "Shadow")
        maim -st 9999999 | convert - \( +clone -background black -shadow 80x3+5+5 \) +swap -background none -layers merge +repage ~/Pictures/$name.png ;;
    "Active")
        maim -i $(xdotool getactivewindow) ~/Pictures/$name.png ;;
esac

network-toggle - Toggle Network

result=$(nmcli device | sed '1d' | dmenu -l 20);

interface=$(echo $result | awk -F ' ' '{print $1}');
status=$(echo $result | awk -F ' ' '{print $3}');

if [ $status == 'disconnected' ]; then
  nmcli device connect $interface
else
  nmcli device disconnect $interface
fi

make-gif - Make GIF

palette="/tmp/palette.png"

filters="fps=15,scale=320:-1:flags=lanczos"

ffmpeg -v warning -i $1 -vf "$filters,palettegen" -y $palette
ffmpeg -v warning -i $1 -i $palette -lavfi "$filters [x]; [x][1:v] paletteuse" -y $2

yt-audio - Download-Audio from youtube

if [ $TMUX ]; then
    tmux split -v -l 5 "cd ~/Downloads/ && youtube-dl --add-metadata -xic -f bestaudio/best $1" && tmux select-pane -U
else
    cd ~/Downloads/;
    setsid nohup youtube-dl --add-metadata -xic -f bestaudio/best $1 &> /dev/null &
fi

yt-video - Download-Video from youtube

if [ $TMUX ]; then
    tmux split -v -l 5 "cd ~/Downloads/ && youtube-dl --add-metadata -ic $1" && tmux select-pane -U
else
    cd ~/Downloads/;
    setsid nohup youtube-dl --add-metadata -ic $1 &> /dev/null &
fi

setbg - Set Background

bgloc="${XDG_CACHE_HOME:-$HOME/.cache/}/bg"

[ -f "$1" ] && ln -sf "$(readlink -f "$1")" "$bgloc"

[ -d "$1" ] && ln -sf "$(find "$(readlink -f "$1")" -iregex '.*.\(jpg\|jpeg\|png\|gif\)' -type f | shuf -n 1)" "$bgloc"

xwallpaper --zoom "$bgloc"

insert-unicode - Insert Unicode Icon

# Must have xclip installed to even show menu.
xclip -h 2>/dev/null || exit 1

chosen=$(cut -d ';' -f1 ~/.local/data/emojis | rofi -dmenu -i -l 20 | sed "s/ .*//")

[ "$chosen" != "" ] || exit

# If you run this command with an argument, it will automatically insert the character.
if [ -n "$1" ]; then
    xdotool key Shift+Insert
else
    echo "$chosen" | tr -d '\n' | xsel -ib
    dunstify "'$chosen' copied to clipboard." &
fi

insert-nerd-fonts - Insert Nerd Font Icon

# Must have xsel installed to even show menu.
xsel -h 2>/dev/null || exit 1

chosen=$(cat ~/.local/data/nerd-fonts | rofi -dmenu -i -l 20 | sed "s/ .*//")

[ "$chosen" != "" ] || exit

# If you run this command with an argument, it will automatically insert the character.
if [ -n "$1" ]; then
    xdotool key Shift+Insert
else
    echo "$chosen" | tr -d '\n' | xsel -ib
    dunstify "'$chosen' copied to clipboard." &
fi

linkhandler - Open with Default application

Inspired from linkhandler https://github.com/LukeSmithxyz/voidrice/ This is used in newsboat to handle links 

[ -z "$1" ] && { "$BROWSER"; exit; }

case "$1" in
    *mkv|*webm|*mp4|*youtube.com/watch*|*youtube.com/playlist*|*youtu.be*|*hooktube.com*|*bitchute.com*)
        setsid mpv --input-ipc-server=/tmp/mpvsoc$(date +%s) -quiet "$1" >/dev/null 2>&1 & ;;
    *png|*jpg|*jpe|*jpeg|*gif)
        curl -sL "$1" > "/tmp/$(echo "$1" | sed "s/.*\///")" && sxiv -a "/tmp/$(echo "$1" | sed "s/.*\///")"  >/dev/null 2>&1 & ;;
    *mp3|*flac|*opus|*mp3?source*)
        setsid tsp curl -LO "$1" >/dev/null 2>&1 & ;;
    *)
        if [ -f "$1" ]; then "$TERMINAL" -e "$EDITOR $1"
        else setsid $BROWSER "$1" >/dev/null 2>&1 & fi ;;
esac

lockscreen - LockScreen

First, turn off dunst 

killall -SIGUSR1 dunst && echo "off" > /tmp/dunststatus;

Turn off the music if it is playing. 

MPC_STATE=$(mpc | sed -n '2p' | cut -d "[" -f2 | cut -d "]" -f1)
if [[ $MPC_STATE == "playing" ]]; then
  mpc pause
fi

Then take a screenshot and process it. 

temp_file="/tmp/screen.png"

rm -f $temp_file

maim $temp_file
convert $temp_file -scale 10% -scale 1000% $temp_file

Finally, lock the screen using i3lock. 

i3lock --no-unlock-indicator --ignore-empty-password --nofork --image=$temp_file && killall -SIGUSR2 dunst && echo "on" > /tmp/dunststatus

revert() {
    xset dpms 0 0 0
}
trap revert HUP INT TERM
# turn off screen after 5 seconds
xset +dpms dpms 5 5 5

# Parameters
temp_file="/tmp/screen.png"
icon="$HOME/Pictures/Evil_Rick_Sprite.png"
width=1920
height=1080
blur_factor=6
lock_blur_factor=0

# Take the screen shot, blur the image and add the icon
ffmpeg -f x11grab -video_size "${width}x${height}" -y -i $DISPLAY -i $icon -filter_complex "boxblur=$blur_factor:$blur_factor,overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/2,boxblur=$lock_blur_factor:$lock_blur_factor" -vframes 1 $temp_file

# Alternative
# maim -d 1 $temp_file
# convert -blur 0x8 $temp_file $temp_file
# convert -composite $temp_file $icon -gravity South -geometry -20x1200 $temp_file

# Lock the screen with the image
i3lock --no-unlock-indicator --ignore-empty-password --show-failed-attempts --nofork --image=$temp_file

# Remove the screenshot
rm $temp_file

# Don't turn off screen when back from lock
revert

mopidy-restart - Restart Mopidy

pids=( $(pgrep -f mopidy) )

for pid in "${pids[@]}"; do
    if [[ $pid != $$ ]]; then
        kill "$pid"
    fi
done

echo "Killed mopidy."
echo "Restarting mopidy..."
mopidy --config ~/.config/mopidy/mopidy.conf >/dev/null 2>&1 &
echo "Done"

upload - Upload Script

if [ $TMUX ]; then
    tmux split -v -l 1 "curl --progress-bar -F\"file=@$1\" https://0x0.st | xsel -ib;" && tmux select-pane -U
else
    curl --progress-bar -F"file=@$1" https://0x0.st | xsel -ib && \
        dunstify 'Upload' 'Successful' || \
        dunstify --urgency=critical 'Upload' 'Failed'
fi

weather - Display Weather in terminal

if [ -n "$*" ]; then
    address="wttr.in/"
    address+=$*
else
    address="wttr.in/"
fi

if type sxiv > /dev/null 2>&1; then
    address+=".png"

    wget -qO- "$address" > /tmp/weather.png && \
        sxiv -b /tmp/weather.png
elif type feh > /dev/null 2>&1; then
    address+=".png"

    wget -qO- "$address" | feh -
else
    curl "$address"
fi

readbib - Open Bibliography File

cd ~/Cloud/pdfs/ && ls | rofi -dmenu -lines 20 | xargs -I {} zathura {}

readnotes - Open Note File

cd ~/Cloud/thesis/ressources/notes/pdfs/ && ls *.pdf | rofi -dmenu -lines 20 | xargs -I {} zathura {}

pdf2bib - Extract bibtex entry from PDF file

pdf2doi () {
    pdfinfo "$1" | grep -io "doi:.*" | grep -Poi "10.\d+/[^\s]+" || \
        pdftotext "$1" 2>/dev/null - | grep -io "doi:.*" -m 1 | grep -Poi "10.\d+/[^\s]+" || \
        pdftotext "$1" 2>/dev/null - | grep -Poi "10.\d+/[^\s]+"
}

doi2bib () {
    # curl -LHs "Accept: application/x-bibtex" http://dx.doi.org/$1 -w "\\n"
    curl -s "http://api.crossref.org/works/$1/transform/application/x-bibtex" -w "\\n"
}

# If a file is specified, try to extract DOI from the file
if [ -f "$1" ]; then
    doi=$(pdf2doi "$1")
fi

if hash rofi 2>/dev/null; then
    doi=$(echo "$doi" | rofi -i -dmenu -p "DOI")
else
    doi=$(echo "$doi" | dmenu -i -p "DOI")
fi

if [ -n "$1" ]; then
    doi2bib $doi | xsel -ib && \
        dunstify 'BibTeX' 'Copied to Clipboard' || \
        dunstify --urgency=critical 'BibTeX' 'Failed'
fi

pdf2png - Convert a PDF to PNG

if [[ -f $1 && $1 == *.pdf ]]; then
    pdftoppm -png $1 > $(echo $1 | cut -f 1 -d '.' | sed 's/$/.png/')
fi

pdf-shrink - Pdf Shrink

shrink ()
{
gs \
  -q -dNOPAUSE -dBATCH -dSAFER \
  -sDEVICE=pdfwrite \
  -dCompatibilityLevel=1.3 \
  -dPDFSETTINGS=/screen \
  -dEmbedAllFonts=true \
  -dSubsetFonts=true \
  -dAutoRotatePages=/None \
  -dColorImageDownsampleType=/Bicubic \
  -dColorImageResolution=$3 \
  -dGrayImageDownsampleType=/Bicubic \
  -dGrayImageResolution=$3 \
  -dMonoImageDownsampleType=/Subsample \
  -dMonoImageResolution=$3 \
  -sOutputFile="$2" \
  "$1"
}

check_smaller ()
{
# If $1 and $2 are regular files, we can compare file sizes to
# see if we succeeded in shrinking. If not, we copy $1 over $2:
if [ ! -f "$1" -o ! -f "$2" ]; then
return 0;
fi
ISIZE="$(echo $(wc -c "$1") | cut -f1 -d\ )"
OSIZE="$(echo $(wc -c "$2") | cut -f1 -d\ )"
if [ "$ISIZE" -lt "$OSIZE" ]; then
echo "Input smaller than output, doing straight copy" >&2
cp "$1" "$2"
fi
}

usage ()
{
echo "Reduces PDF filesize by lossy recompressing with Ghostscript."
echo "Not guaranteed to succeed, but usually works."
echo "  Usage: $1 infile [outfile] [resolution_in_dpi]"
}

IFILE="$1"

# Need an input file:
if [ -z "$IFILE" ]; then
usage "$0"
exit 1
fi

# Output filename defaults to "-" (stdout) unless given:
if [ ! -z "$2" ]; then
OFILE="$2"
else
OFILE="-"
fi

# Output resolution defaults to 72 unless given:
if [ ! -z "$3" ]; then
res="$3"
else
res="90"
fi

shrink "$IFILE" "$OFILE" "$res" || exit $?

check_smaller "$IFILE" "$OFILE"

pdf-delete-annotations - Delete Annotations from PDFs

From: https://gist.github.com/stefanschmidt/5248592 

pdftk $1 output /tmp/uncompressed.pdf uncompress
LANG=C sed -n '/^\/Annots/!p' /tmp/uncompressed.pdf > /tmp/stripped.pdf
pdftk /tmp/stripped.pdf output $1 compress

pdf-delete-first-page - Delete first page of PDF

The requirement is to have pdftk or stapler installed. 

if [[ -f $1 && $1 == *.pdf ]]; then
    # Argument if a file
    if type stapler > /dev/null 2>&1; then
        stapler del "$1" 1 /tmp/pdftk_out.pdf && mv /tmp/pdftk_out.pdf "$1"
    elif type pdftk > /dev/null 2>&1; then
        pdftk "$1" cat 2-end output /tmp/pdftk_out.pdf && mv /tmp/pdftk_out.pdf "$1"
    else
        echo "Neither pdftk nor stapler are installed"
    fi
fi

Author: Dehaeze Thomas

Created: 2020-05-26 mar. 08:39