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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,241 @@ | ||
| #!/usr/bin/env bash | ||
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| set -o pipefail | ||
|
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| # tmux requires unrecognized OSC sequences to be wrapped with DCS tmux; | ||
| # <sequence> ST, and for all ESCs in <sequence> to be replaced with ESC ESC. It | ||
| # only accepts ESC backslash for ST. We use TERM instead of TMUX because TERM | ||
| # gets passed through ssh. | ||
| function print_osc() { | ||
| if [[ $TERM == screen* || $TERM == tmux* ]]; then | ||
| printf "\033Ptmux;\033\033]" | ||
| else | ||
| printf "\033]" | ||
| fi | ||
| } | ||
|
|
||
| # More of the tmux workaround described above. | ||
| function print_st() { | ||
| if [[ $TERM == screen* || $TERM == tmux* ]]; then | ||
| printf "\a\033\\" | ||
| else | ||
| printf "\a" | ||
| fi | ||
| } | ||
|
|
||
| function load_version() { | ||
| if [ -z ${IMGCAT_BASE64_VERSION+x} ]; then | ||
| IMGCAT_BASE64_VERSION=$(base64 --version 2>&1) | ||
| export IMGCAT_BASE64_VERSION | ||
| fi | ||
| } | ||
|
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||
| function b64_encode() { | ||
| load_version | ||
| if [[ $IMGCAT_BASE64_VERSION =~ GNU ]]; then | ||
| # Disable line wrap | ||
| base64 -w0 | ||
| else | ||
| base64 | ||
| fi | ||
| } | ||
|
|
||
| function b64_decode() { | ||
| load_version | ||
| if [[ $IMGCAT_BASE64_VERSION =~ fourmilab ]]; then | ||
| BASE64ARG=-d | ||
| elif [[ $IMGCAT_BASE64_VERSION =~ GNU ]]; then | ||
| BASE64ARG=-di | ||
| else | ||
| BASE64ARG=-D | ||
| fi | ||
| base64 $BASE64ARG | ||
| } | ||
|
|
||
| # print_image filename inline base64contents print_filename width height preserve_aspect_ratio | ||
| # filename: Filename to convey to client | ||
| # inline: 0 or 1, if set to 1, the file will be displayed inline, otherwise, it will be downloaded | ||
| # base64contents: Base64-encoded contents | ||
| # print_filename: 0 or 1, if set to 1, print the filename after outputting the image | ||
| # width: set output width of the image in character cells, pixels or percent | ||
| # height: set output height of the image in character cells, pixels or percent | ||
| # preserve_aspect_ratio: 0 or 1, if set to 1, fill the specified width and height as much as possible without stretching the image | ||
| # file: Empty string or file type like "application/json" or ".js". | ||
| function print_image() { | ||
| print_osc | ||
| printf "1337;File=inline=%s" "$2" | ||
| printf ";size=%d" $(printf "%s" "$3" | b64_decode | wc -c) | ||
| [ -n "$1" ] && printf ";name=%s" "$(printf "%s" "$1" | b64_encode)" | ||
| [ -n "$5" ] && printf ";width=%s" "$5" | ||
| [ -n "$6" ] && printf ";height=%s" "$6" | ||
| [ -n "$7" ] && printf ";preserveAspectRatio=%s" "$7" | ||
| [ -n "$8" ] && printf ";type=%s" "$8" | ||
| printf ":%s" "$3" | ||
| print_st | ||
| printf '\n' | ||
| [ "$4" == "1" ] && echo "$1" | ||
| has_image_displayed=t | ||
| } | ||
|
|
||
| function error() { | ||
| errcho "ERROR: $*" | ||
| } | ||
|
|
||
| function errcho() { | ||
| echo "$@" >&2 | ||
| } | ||
|
|
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| function show_help() { | ||
| errcho | ||
| errcho "Usage: imgcat [-p] [-n] [-W width] [-H height] [-r] [-s] [-u] [-t file-type] [-f] filename ..." | ||
| errcho " cat filename | imgcat [-W width] [-H height] [-r] [-s]" | ||
| errcho | ||
| errcho "Display images inline in the iTerm2 using Inline Images Protocol" | ||
| errcho | ||
| errcho "Options:" | ||
| errcho | ||
| errcho " -h, --help Display help message" | ||
| errcho " -p, --print Enable printing of filename or URL after each image" | ||
| errcho " -n, --no-print Disable printing of filename or URL after each image" | ||
| errcho " -u, --url Interpret following filename arguments as remote URLs" | ||
| errcho " -f, --file Interpret following filename arguments as regular Files" | ||
| errcho " -t, --type file-type Provides a type hint" | ||
| errcho " -r, --preserve-aspect-ratio When scaling image preserve its original aspect ratio" | ||
| errcho " -s, --stretch Stretch image to specified width and height (this option is opposite to -r)" | ||
| errcho " -W, --width N Set image width to N character cells, pixels or percent (see below)" | ||
| errcho " -H, --height N Set image height to N character cells, pixels or percent (see below)" | ||
| errcho | ||
| errcho " If you don't specify width or height an appropriate value will be chosen automatically." | ||
| errcho " The width and height are given as word 'auto' or number N followed by a unit:" | ||
| errcho " N character cells" | ||
| errcho " Npx pixels" | ||
| errcho " N% percent of the session's width or height" | ||
| errcho " auto the image's inherent size will be used to determine an appropriate dimension" | ||
| errcho | ||
| errcho " If a type is provided, it is used as a hint to disambiguate." | ||
| errcho " The file type can be a mime type like text/markdown, a language name like Java, or a file extension like .c" | ||
| errcho " The file type can usually be inferred from the extension or its contents. -t is most useful when" | ||
| errcho " a filename is not available, such as whe input comes from a pipe." | ||
| errcho | ||
| errcho "Examples:" | ||
| errcho | ||
| errcho " $ imgcat -W 250px -H 250px -s avatar.png" | ||
| errcho " $ cat graph.png | imgcat -W 100%" | ||
| errcho " $ imgcat -p -W 500px -u http://host.tld/path/to/image.jpg -W 80 -f image.png" | ||
| errcho " $ cat url_list.txt | xargs imgcat -p -W 40 -u" | ||
| errcho " $ imgcat -t application/json config.json" | ||
| errcho | ||
| } | ||
|
|
||
| function check_dependency() { | ||
| if ! (builtin command -V "$1" >/dev/null 2>&1); then | ||
| error "missing dependency: can't find $1" | ||
| exit 1 | ||
| fi | ||
| } | ||
|
|
||
| # verify that value is in the image sizing unit format: N / Npx / N% / auto | ||
| function validate_size_unit() { | ||
| if [[ ! "$1" =~ ^(:?[0-9]+(:?px|%)?|auto)$ ]]; then | ||
| error "Invalid image sizing unit - '$1'" | ||
| show_help | ||
| exit 1 | ||
| fi | ||
| } | ||
|
|
||
| ## Main | ||
|
|
||
| if [ -t 0 ]; then | ||
| has_stdin=f | ||
| else | ||
| has_stdin=t | ||
| fi | ||
|
|
||
| # Show help if no arguments and no stdin. | ||
| if [ $has_stdin = f ] && [ $# -eq 0 ]; then | ||
| show_help | ||
| exit | ||
| fi | ||
|
|
||
| check_dependency base64 | ||
| check_dependency wc | ||
| file_type="" | ||
|
|
||
| # Look for command line flags. | ||
| while [ $# -gt 0 ]; do | ||
| case "$1" in | ||
| -h | --h | --help) | ||
| show_help | ||
| exit | ||
| ;; | ||
| -p | --p | --print) | ||
| print_filename=1 | ||
| ;; | ||
| -n | --n | --no-print) | ||
| print_filename=0 | ||
| ;; | ||
| -W | --W | --width) | ||
| validate_size_unit "$2" | ||
| width="$2" | ||
| shift | ||
| ;; | ||
| -H | --H | --height) | ||
| validate_size_unit "$2" | ||
| height="$2" | ||
| shift | ||
| ;; | ||
| -r | --r | --preserve-aspect-ratio) | ||
| preserve_aspect_ratio=1 | ||
| ;; | ||
| -s | --s | --stretch) | ||
| preserve_aspect_ratio=0 | ||
| ;; | ||
| -f | --f | --file) | ||
| has_stdin=f | ||
| is_url=f | ||
| ;; | ||
| -u | --u | --url) | ||
| check_dependency curl | ||
| has_stdin=f | ||
| is_url=t | ||
| ;; | ||
| -t | --t | --type) | ||
| file_type="$2" | ||
| shift | ||
| ;; | ||
| -*) | ||
| error "Unknown option flag: $1" | ||
| show_help | ||
| exit 1 | ||
| ;; | ||
| *) | ||
| if [ "$is_url" == "t" ]; then | ||
| encoded_image=$(curl -fs "$1" | b64_encode) || { | ||
| error "Could not retrieve image from URL $1, error_code: $?" | ||
| exit 2 | ||
| } | ||
| elif [ -r "$1" ]; then | ||
| encoded_image=$(cat "$1" | b64_encode) | ||
| else | ||
| error "imgcat: $1: No such file or directory" | ||
| exit 2 | ||
| fi | ||
| has_stdin=f | ||
| print_image "$1" 1 "$encoded_image" "$print_filename" "$width" "$height" "$preserve_aspect_ratio" "$file_type" | ||
| ;; | ||
| esac | ||
| shift | ||
| done | ||
|
|
||
| # Read and print stdin | ||
| if [ $has_stdin = t ]; then | ||
| print_image "" 1 "$(cat | b64_encode)" 0 "$width" "$height" "$preserve_aspect_ratio" "$file_type" | ||
| fi | ||
|
|
||
| if [ "$has_image_displayed" != "t" ]; then | ||
| error "No image provided. Check command line options." | ||
| show_help | ||
| exit 1 | ||
| fi | ||
|
|
||
| exit 0 |
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This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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