diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/bindings.sh | 116 | ||||
| -rw-r--r-- | lib/functions.sh | 81 | ||||
| -rw-r--r-- | lib/prompt.sh | 5 |
3 files changed, 202 insertions, 0 deletions
diff --git a/lib/bindings.sh b/lib/bindings.sh new file mode 100644 index 0000000..a0bb31b --- /dev/null +++ b/lib/bindings.sh @@ -0,0 +1,116 @@ +#!/bin/bash + +# source this file to load key bindings for bpresent + +# alt-w: +# clear screen and go back to previous example +_binding_alt_w=( + '"\ew":"' #alt-w + '\C-a\C-k' #clear line + '$(( _I > 0 && _I-- ))' #decrement unless we've bottomed out + '\e\C-e\C-a\C-k' #interpolate to run decrement above and clear the line + '\\\n\C-l' #bring us down onto a newline and clear screen + '\"$(_example.unpack \"${_examples[$_I]}\")\"' #pull the current example + '\e\C-e"' #interpolate + ) + +# alt-W: +# go back to previous example without clearing the screen +_binding_alt_W=( + '"\eW":"' #alt-W + '\C-a\C-k' #clear line + '$(( _I > 0 && _I-- ))' #decrement unless we've bottomed out + '\e\C-e\C-a\C-k' #interpolate to run decrement above and clear the line + '\\\n' #bring us down onto a newline + '\"$(_example.unpack \"${_examples[$_I]}\")\"' #pull the current example + '\e\C-e"' #interpolate + ) + +# alt-a: +# clear screen and provide current example again without advancing +_binding_alt_a=( + '"\ea":"' #alt-a + '\C-a\C-k' #clear line + '\\\n\C-l' #bring us down onto a newline and clear screen + '\"$(_example.unpack \"${_examples[$_I]}\")\"' #pull the current example + '\e\C-e"' #interpolate + ) + +# alt-A: +# clear screen and provide current example again without advancing +_binding_alt_A=( + '"\eA":"' #alt-A + '\C-a\C-k' #clear line + '\\\n' #bring us down onto a newline + '\"$(_example.unpack \"${_examples[$_I]}\")\"' #pull the current example + '\e\C-e"' #interpolate + ) + +# alt-e: +# clear screen and advance to next example +_binding_alt_e=( + '"\ee":"' #alt-e + '\C-a\C-k' #clear line + '$(( _I < ${#_examples[@]} - 1 && _D && _I++,_D=1 ))' #increment,deinitialize + '\e\C-e\C-a\C-k' #interpolate to run above and clear the line + '\\\n\C-l' #bring us down onto a newline and clear screen + '\"$(_example.unpack \"${_examples[$_I]}\")\"' #pull the current example + '\e\C-e"' #interpolate + ) + +# alt-E: +# advance to next example without clearing the screen +_binding_alt_E=( + '"\eE":"' #alt-E + '\C-a\C-k' #clear line + ' $(( _I < ${#_examples[@]} - 1 && _D && _I++,_D=1 ))' #increment,deinitialize + '\e\C-e\C-a\C-k' #interpolate to run above and clear the line + '\\\n' #bring us down onto a newline + '\"$(_example.unpack \"${_examples[$_I]}\")\"' #pull the current example + '\e\C-e"' #interpolate + ) + +# alt-s: +# side by side diff of previous and current example +_binding_alt_s=( + '"\es":"' #alt-s + '\C-a\C-k' #clear line + '_example.ydiff' #diff command + '\C-l\n"' #clear screen and execute function + ) + +# alt-S: +# syntax highlighted side by side diff of previous and current example +_binding_alt_S=( + '"\eS":"' #alt-S + '\C-a\C-k' #clear line + '_example.ydiff | hl --style clarity' #highlighted diff command + '\C-l\n"' #clear screen and execute function + ) + +# alt-h: +# display current example with syntax highlighting +_binding_alt_h=( + '"\eh":"' #alt-h + '_example.highlight' + '\C-m' +) + +# alt-H: +# display USAGE text for ariketa +_binding_alt_H=( + '"\eH":"' #alt-H + '_ariketa.help' + '\C-m' +) + +# alt-P: +# Toggle between custom PS2 for giving example number and regular '>' prompt +_binding_alt_P=( + '"\eP":"' #alt-P + '_ps2.swap' + '\C-m"' + ) + +#load bindings +_bindings.load_from_arrays ${!_binding_*} diff --git a/lib/functions.sh b/lib/functions.sh new file mode 100644 index 0000000..f8e679f --- /dev/null +++ b/lib/functions.sh @@ -0,0 +1,81 @@ +#!/bin/bash + +### ariketa helper functions + +# establish key bindings in current session +## accepts split string arrays or strings, one array or string per binding +_bindings.load_from_arrays () { + local _binding + for _binding; do + declare -n _binding_array="${_binding}" + bind "${_binding_array[*]}" + done +} + +_example.highlight () { + hl < <(echo "${_examples[$_I]}") +} + +### prompt / tagging helpers + +#custom tag:value tuple handlers for _examples array +## tag delineator is ":\n" +_example.unpack() { + printf "%s" "${1#*:$'\n'}" +} + +_tag.unpack() { + local _tag + printf -v _tag "%s" "${1%%:$'\n'*}" + (( ${#_tag} < ${#1} )) || return 1 + printf "%s" "$_tag" +} + +#presentation page header prompt display functions +## specify custom indicator as argument, '+' is default +_ps2.swap () { + local _cur_ps2="${PS2}" + PS2="$_old_ps2" + _old_ps2="$_cur_ps2" +} + +_tag.same_as_next? () { + [[ "$(_tag.unpack "${_examples[$_I]}")" \ + == "$(_tag.unpack "${_examples[$((_I+1))]}")" ]] \ + || return 1 + printf "%s" "${1:-+}" +} + +_tag.same_as_prev? () { + [[ "$(_tag.unpack "${_examples[$_I]}")" \ + == "$(_tag.unpack "${_examples[$((_I-1))]}")" ]] \ + || return 1 + printf "%s" "${1:-+}" +} + +_tag.display () { + local _tag=$(_tag.unpack "${_examples[$_I]}") \ + && printf "[$(_tag.same_as_prev?) %s $(_tag.same_as_next?)]" "${_tag}" +} + +### public functions + +#simple bash code highlighting if the 'highlight' program is installed +## http://www.andre-simon.de/doku/highlight/en/highlight.php +hl () { + local hl=$(which highlight 2>/dev/null) || { + printf "%s\n" "${@}" + return + } + "$hl" --syntax bash -O xterm256 "${@}" +} + +#diff between adjacent examples +ydiff () { + diff -wyW${COLUMNS:-80} \ + <(echo "${_examples[(( _I - ${1:-1} ))]}") \ + <(echo "${_examples[(( _I ))]}") + local diff_err=$? + (( diff_err <= 1 )) || return $diff_err + return 0 +} diff --git a/lib/prompt.sh b/lib/prompt.sh new file mode 100644 index 0000000..7c0fe43 --- /dev/null +++ b/lib/prompt.sh @@ -0,0 +1,5 @@ +#!/bin/bash + +[[ $(declare -p PS1) == *\\\$\?* ]] || PS1=' [$?] '"$PS1" +_old_PS2="$PS2" +PS2='## example $((_I+1)) / ${#_examples[@]} $(_tag.display)\n\n' |