Better zsh init and prompt

private_dot_config/zsh/dot_zshrc

@@ -1,29 +1,58 @@
 # color stuff
+
+# return contrasted color
+contrastcol() {
+  local bg=${1:-#000000}
+  local dark=${2:-#2e3440}  # color if provided color is light
+  local light=${3:-#eceff4} # color if provided color is dark
+  local threshold=${4:-128}
+
+  local r=$((16#${bg[2,3]})) # use arithmetic expansion to convert hex to decimal
+  local g=$((16#${bg[4,5]}))
+  local b=$((16#${bg[6,7]}))
+
+  local brightness=$((0.2126*r + 0.7152*g + 0.0722*b)) # For rough calculations, the formula uses linear RGB values (0–255) with CIE-weighted coefficients | source: https://www.codestudy.net/blog/formula-to-determine-perceived-brightness-of-rgb-color
+  if ((brightness > threshold)); then
+    echo $dark
+  else
+    echo $light
+fi
+}
+
+# set darktheme if between 18 and 6
+DARK=false
+if (($(date +%H) < 6 && $(date +%H) > 18)); then
+  DARK=true
+fi
+
+# Run pywal automatically; can be forced just by putting a blank ".reset_color" in home directory
 if ([ -f $XDG_CONFIG_HOME/wallpaper/current ] && [ ! -d $XDG_CACHE_HOME/wal ]) || [ -f $HOME/.reset_color ]; then
   wal --cols16 dual -n -e -s -t -p "current_theme" -i .config/wallpaper/current
   [ -f $HOME/.reset_color ] && rm $HOME/.reset_color
 fi
+
+# if pywal has been runned, get colors
 if [ -f $XDG_CACHE_HOME/wal/colors ]; then
-    BACKGROUND_COL=$(sed '1q;d' $XDG_CACHE_HOME/wal/colors)
+  BG1=$(sed '1q;d' $XDG_CACHE_HOME/wal/colors)
-    COL1=$(sed '2q;d' $XDG_CACHE_HOME/wal/colors)
+  BG2=$(sed '2q;d' $XDG_CACHE_HOME/wal/colors)
-    COL2=$(sed '15q;d' $XDG_CACHE_HOME/wal/colors)
+  BG3=$(sed '3q;d' $XDG_CACHE_HOME/wal/colors)
-    COL3=$(sed '3q;d' $XDG_CACHE_HOME/wal/colors)
+  BG4=$(sed '4q;d' $XDG_CACHE_HOME/wal/colors)
-    COL4=$(sed '14q;d' $XDG_CACHE_HOME/wal/colors)
+else
-    COL5=$(sed '4q;d' $XDG_CACHE_HOME/wal/colors)
+  BG1=#2e3440
-    CURSOR_COL=$(sed '16q;d' $XDG_CACHE_HOME/wal/colors)
+  BG2=#3c4453
+  BG3=#454d5f
+  BG4=#4d576a
 fi
 
+FG1=$(contrastcol "$BG1")
+FG2=$(contrastcol "$BG2")
+FG3=$(contrastcol "$BG3")
+FG4=$(contrastcol "$BG4")
+
 # source global shell alias & variables files
 [ -f "$XDG_CONFIG_HOME/shell/alias" ] && source "$XDG_CONFIG_HOME/shell/alias"
 [ -f "$XDG_CONFIG_HOME/shell/vars" ] && source "$XDG_CONFIG_HOME/shell/vars"
 
-# Set up the prompt
-#autoload -Uz promptinit
-#promptinit
-#prompt adam1
-
-setopt histignorealldups sharehistory
-
 # Use emacs keybindings even if our EDITOR is set to vi
 bindkey -e
 
@@ -55,8 +84,8 @@ zstyle ':completion:*:kill:*' command 'ps -u $USER -o pid,%cpu,tty,cputime,cmd'
 export GCC_COLORS='error=01;31:warning=01;35:note=01;36:caret=01;32:locus=01:quote=01'
 
 # main opts
-setopt append_history inc_append_history share_history
+setopt append_history inc_append_history share_history hist_ignore_all_dups
-# on exit, history appends rather than overwrites; history is appended as soon as cmds executed; history shared across sessions
+# on exit, history appends rather than overwrites; history is appended as soon as cmds executed; history shared across sessions; delete older command when duplicate
 setopt auto_menu menu_complete # autocmp first menu match
 setopt autocd # type a dir to cd
 setopt auto_param_slash # when a dir is completed, add a / instead of a trailing space
@@ -67,11 +96,11 @@ setopt interactive_comments # allow comments in shell
 unsetopt prompt_sp # don't autoclean blanklines
 stty stop undef # disable accidental ctrl s
 
-# history opts
+# more history opts
 HISTFILE="$XDG_CACHE_HOME/zsh_history" # move histfile to cache
 HISTCONTROL=ignoreboth # consecutive duplicates & commands starting with space are not saved
-HISTSIZE=1000
+HISTSIZE=10000
-SAVEHIST=1000
+SAVEHIST=10000
 
 # fzf setup
 source <(fzf --zsh) # allow for fzf history widget
@@ -79,23 +108,15 @@ source <(fzf --zsh) # allow for fzf history widget
 # set up prompt
 NEWLINE=$'\n'
 POWERLINE_START="\ue0d4"
-POWERLINE_SEPARATOR="\ue0c6"
+POWERLINE_SEPARATOR="\ue0c7"
 POWERLINE_STOP="\ue0b4"
 PROMPT_ENTER="" #"\ueb70"
 
 precmd() {
-    print ""
+  print "" # empty line to increase readability
-    if [ -z ${BACKGROUND_COL} ]; then
+  print -P "%F{${BG1}}${POWERLINE_START}%K{${BG1}}%F{${FG1}} %y on %M %K{${BG1}}%F{${BG2}}${POWERLINE_SEPARATOR}%K{${BG2}}%F{${FG2}} %n %K{${BG2}}%F{${BG3}}${POWERLINE_SEPARATOR}%K{${BG3}}%F{${FG3}} %~ %K{${BG3}}%F{${FG4}}${POWERLINE_SEPARATOR}%k%F{${FG4}}${POWERLINE_STOP}"
-        print -P "%F{#2e3440}${POWERLINE_START}%K{#2e3440}%F{#e5e9f0} %y on %M %K{#3b4252}%F{#2e3440}${POWERLINE_SEPARATOR}%K{#3b4252}%F{#eceff4} %n %K{#4c566a}%F{#3b4252}${POWERLINE_SEPARATOR}%F{#eceff4} %~ %K{#eceff4}%F{#4c566a}${POWERLINE_SEPARATOR} %k%F{#eceff4}${POWERLINE_STOP}" # nord theme
-    else
-        print -P "%K{${COL1}}%F{${COL2}} %N  %K{${COL3}}%F{${COL4}} %n %K{${COL5}} %~ %f%k ❯" # custom dynamic theme
-    fi
 }
-if [ -z ${BACKGROUND_COL} ]; then
+PROMPT="${PROMPT_ENTER} " # nord theme
-    PROMPT="${PROMPT_ENTER} " # nord theme
-else
-    PROMPT="${PROMPT_ENTER} " # custom dynamic theme
-fi
 
 echo -e "${NEWLINE}\x1b[38;5;137m\x1b[48;5;0m it's $(print -P '%D{%_H:%M%P}\n') \x1b[38;5;180m\x1b[48;5;0m $(uptime -p | cut -c 4-) \x1b[38;5;223m\x1b[48;5;0m $(uname -r) \033[0m" # current