style.sh

CLEAR_FORMAT="\x1B[0m"
SYMBOL_MODIFIERS=("blink" "reversed" "underlined" "crossed" "fg_color" "bg_color", "reset")
declare -gA _style_obj
# $1 - style name
function style.new() {
    _style_obj["$1"]=1
    _style_obj["$1:style"]=""
    # Every style property set to 0
    _style_obj["$1:clean"]=1
}

# $1 - style name
# $2, $3, ... - names of properties to enable, see SYMBOL_MODIFIERS for supported modifiers and their value param
# If property needs specific value you should pass it after = symbol, for example color=red
# Else pass 1 or 0 to enable or disable (if = unpassed then default will be 1)
# For example blink=1 or blink enables blink, blink=0 disables it
# See coresponding functions below for each property

function style.set_style() {
    local i
    declare -A style_with_value
    for i in "${@:2}"
    do
        IFS="=" read key value <<< "$i"
        style_with_value[$key]=$value
    done

    for i in "${!style_with_value[@]}"
    do
        local value=${style_with_value[$i]}
        case $i in
            blink)
                style.set_blink $1 ${value:-1}
            ;;
            reversed)
                style.set_reverse $1 ${value:-1}
            ;;
            underlined)
                style.set_underline $1 ${value:-1}
            ;;
            crossed)
                style.set_cross $1 ${value:-1}
            ;;
            bg_color)
                style.set_background_color $1 ${value:-"255;255;255"}
            ;;
            fg_color)
                style.set_foreground_color $1 ${value:-"255;255;255"}
            ;;
            reset)
                style.set_reset $1 ${value:-1}
            ;;
            *)
                echo "Unrecognized $i property, exiting"
                exit
            ;;
        esac
    done
}

# $1 style name
# $2 - enable(1) or disable(0) 
# Makes text blink
function style.set_blink() {
    style._set_property $1 $2 blink "\x1B[5m"
}

# $1 style name
# $2 - enable(1) or disable(0) 
# Reverses foreground and background color
function style.set_reverse() {
    style._set_property $1 $2 reversed "\x1B[7m"
}

# $1 style name
# $2 - enable(1) or disable(0) 
# Underlines text
function style.set_underline() {
    style._set_property $1 $2 underlined "\x1B[4m"
}

# $1 style name
# $2 - enable(1) or disable(0) 
# Crosses text
function style.set_cross() {
    style._set_property $1 $2 crossed "\x1B[9m"
}

# $1 style name
# $2 - enable(1) or disable(0) 
# Clears all styles, applied before that style
# Not guaranteed that clear will not also remove current style, or half of it
# Better to use as separate option
function style.set_reset() {
    style._set_property $1 $2 reset "\x1B[0m"
}


# $1 style name
# $2 - arg in r;g;b format, none or 0 for disabling 
# Set foreground color (text, symbols, etc)
function style.set_foreground_color() {
    local enable=1
    local color
    if [ "$2" = "none" ] || [ "$2" = "0" ]; then
        enable=0
    else
        color_check $2
        color="\x1B[38;2;${2}m"
    fi
    style._set_property $1 $enable fg_color $color 

}


# $1 style name
# $2 - arg in r;g;b format, none or 0 for disabling 
# Set background color (background, etc)
function style.set_background_color() {
    local enable=1
    local color
    if [ "$2" = "none" ] || [ "$2" = "0" ]; then
        enable=0
    else
        color_check $2
        color="\x1B[48;2;${2}m"
    fi
    style._set_property $1 $enable bg_color $color 
}

# $1 - style name
# $2 - x pos
# $3 - y pos
# Adds selected style to buffer symbol,
# !!! If you want to apply big amount of characters(for example background), 
# then please use style.apply_rect, its way more faster
function style.apply() {
    if [ ${_style_obj["$1:clean"]} -eq 0 ]; then
        buffer.insert_modifier "${_style_obj["$1:style"]}" $2 $3 
    fi
}

# $1 - style name
# $2 - start x pos
# $3 - start y pos
# $4 - end x pos
# $5 - end y pos
function style.apply_rect() {
    if [ ${_style_obj["$1:clean"]} -eq 0 ]; then
        buffer.insert_modifier_rect "${_style_obj["$1:style"]}" $2 $3 $4 $5
    fi
}


# $1 style name 
# $2 - condition (1 or 0 for diasbling) 
# $3 - key name
# $4 - code
# Sets any style property for currenty style obj
function style._set_property() {
    _style_obj["$1:style"]=${_style_obj["$1:style"]/"${_style_obj["$1:style:$3"]}"/""}
    if [ -z "$4" ] || [ "$2" = 0 ]; then
        unset _style_obj["$1:style:$3"]
    else
        _style_obj["$1:style"]+="$4"
        _style_obj["$1:style:$3"]="$4"
        _style_obj["$1:clean"]=0
    fi
}



# $1 style name
# Deletes style
function style.delete() {
    unset _style_obj["$1"]
    unset _style_obj["$1:style"]
    unset _style_obj["$1:clean"]
    local i
    for i in "${STYLE_MODIFIERS[@]}"; do 
        unset _style_obj["$1:style:$i"]
    done
}