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#compdef xli xloadimage xsetbg xview

local rc ipath extension filter type args

if rc=( ${(f)"$($words[1] -path)"} ); then
  # xli
  filter=( .Z )
  args=(
    '-cache[force caching of entire input]'
    "-delete[enable deleting images with 'x' key]"
    '-dispgamma[specify gamma correction]'
    '-fillscreen[use whole screen, zooming image]'
    '-focus[take keyboard focus]'
    '-path[display image path and suffixes]'
    -dumpcore
    '*-iscale[scale image]:scale factor'
    '*-c'{,olor}'dither[dither image]'
    '*-expand[expand image to 24-bit]'
    '*-xpm[specify xpm color map]:color context key:((m\:mono g4\:4\ level\ gray g\:gray c\:color))'
  )
else
  # xloadimage
  rc=( ${(f)"$($words[1] -configuration)"} )
  filter=( ${${(Q)rc[4,-1]%% -*}# } )
  type=( ${(f)"$($words[1] -supported)"} )
  args=(
    '-configuration[display image path, suffixes and filters]'
    '-dump[dump image into file]:image type:( '${(F)${(M)type:#*Yes*}%% *}' ):filename:_files'
    -slideshow
    '*-type[force type of image]:type name:( '${(F)type[3,-1]%% *}' )'
    '*-shrink[shrink image to fit display]'
    '*-tile[tile image to fill display]'
    '*-global[following option applies to all images]'
  )
fi
ipath=( . ${=${(M)rc:#*path:*}#*:} )
extension=( ${=${(M)rc:#*extensions:*}#*:} )
# set default file extensions if there are none
(( $#extension )) || extension=(
  .gif .jpg .jpeg .png .rle .csun .msun .sun .face
  .xbm .bm .fbm .pcx .ppm .pgm .pbm .tga .xpm
)

# all options are valid after -help so no exclusion lists below
_x_arguments "$args[@]" \
  '-default[set root background to default]' \
  '-fit[use default visual and colormap]' \
  '-fullscreen[use whole screen, surrounding image with border]' \
  "-goto[specify image to display at end]:image name:_files -W ipath -g '*(#i)(${(j:|:)extension})(|${(j:|:)filters})(-.)'" \
  '(*)-help[display information on options]' \
  '-identity[identify supplied images instead of displaying]' \
  '-install[forcibly install image colormap on focus]' \
  '-list[list images]' \
  '-onroot[display to root window]' \
  '-path[display image path and suffixes]' \
  '-pixmap[force the use of a pixmap as backing-store]' \
  '-private[force use of a private colormap]' \
  '-quiet[quiet operation]' \
  '-supported[list supported image types]' \
  '-verbose[verbose operation]' \
  '-version[display version info]' \
  '-view[view image in window]' \
  '-visual[force use of a specific visual]:visual:_x_visual' \
  '-windowid[set background pixmap of specific window]:window id:_x_window' \
  -fork -debug \
  '*-border[specify background color]:background color:_x_color' \
  '*-brighten[brighten/darken image]:percentage multiplier' \
  '*-colors[specify maximum colors in image]:colors' \
  '*-delay[delay before advancing to next image]:seconds' \
  '*-dither[dither color image to mono]' \
  '*-gamma[specify gamma of display image was intended for]:gamma' \
  '*-gr'{a,e}'y[convert image to grayscale]' \
  '*-idelay[specify delay for this image]' \
  '*-smooth[smooth a color image]' \
  '*-xzoom[zoom X axis of image]:percentage' \
  '*-yzoon[zoom Y axis of image]:percentage' \
  '*-zoom:percentage' \
  '*-newoptions[reset options]' \
  '*-at[specify coordinates to load next image at]' \
  '*-background[specify background color for next image]:color:_x_color' \
  '*-center[center next image on base image]' \
  '*-clip:X,Y,W,H' \
  '*-foreground[specify foreground color for next image]:color:_x_color' \
  '*-halftone[force halftone dithering]' \
  '*-invert[invert a monochrome image]' \
  '*-merge[merge image onto the base image]' \
  "*-name[specify image name]:picture file:_files -W ipath -g '*(#i)(${(j:|:)extension})(|${(j:|:)filters})(-.)'" \
  '*-normalize' \
  '*-rotate[rotate image clockwise]:degrees of rotation:(90 180 270)' \
  "*:picture file:_files -W ipath -g '*(#i)(${(j:|:)extension})(|${(j:|:)filter})(-.)'"