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.config/i3blocks/rofi-calendar/README.md

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+# rofi-calendar
+
+Have a minimal calendar pop up in rofi when clicking the date blocklet (right click to show next month)
+
+![](screenshot.png)
+
+![](screenshot2.png)
+	
+# Dependencies
+
+* rofi 
+* cal from util-linux package, supporting --color=always
+# Installation
+
+* Copy the script into your directory of choice, e.g. ~/.i3blocks/blocklets
+* Give it execution permission (`chmod +x rofi-calendar`)
+* Edit rofi launch options in the script to fit your needs
+* Add the following blocklet to your i3blocks.conf:
+
+```ini
+[rofi-calendar]
+command=$SCRIPT_DIR/rofi-calendar
+interval=3600
+#BAR_POSITION=bottom
+#WEEK_START=monday
+#DATEFTM=+%a %d %b %Y
+#SHORTFMT=+%d/%m/%Y
+#LABEL= 
+#FONT=Monospace 10
+#LEFTCLICK_PREV_MONTH=false
+#PREV_MONTH_TEXT=« previous month «
+#NEXT_MONTH_TEXT=» next month »
+#ROFI_CONFIG_FILE=/dev/null
+```

.config/i3blocks/rofi-calendar/rofi-calendar

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+#! /usr/bin/env bash
+
+###### Variables ######
+DATEFTM="${DATEFTM:-+%a %d %b %Y}"
+SHORTFMT="${SHORTFMT:-+%d/%m/%Y}"
+LABEL="${LABEL:- }"
+FONT="${FONT:-Monospace 10}"
+LEFTCLICK_PREV_MONTH=${LEFTCLICK_PREV_MONTH:-false}
+PREV_MONTH_TEXT="${PREV_MONTH_TEXT:-« previous month «}"
+NEXT_MONTH_TEXT="${NEXT_MONTH_TEXT:-» next month »}"
+ROFI_CONFIG_FILE="${ROFI_CONFIG_FILE:-/dev/null}"
+BAR_POSITION="${BAR_POSITION:-bottom}"
+WEEK_START="${WEEK_START:-monday}"
+###### Variables ######
+
+
+###### Functions ######
+# get current date and set today header
+get_current_date() {
+  year=$(date '+%Y')
+  month=$(date '+%m')
+  day=$(date '+%d')
+}
+# print the selected month
+print_month() {
+  mnt=$1
+  yr=$2
+  cal --color=always --$WEEK_START $mnt $yr \
+    | sed -e 's/\x1b\[[7;]*m/\<b\>\<u\>/g' \
+          -e 's/\x1b\[[27;]*m/\<\/u\>\<\/b\>/g' \
+          -e '/^ *$/d' \
+    | tail -n +2
+  echo $PREV_MONTH_TEXT$'\n'$NEXT_MONTH_TEXT
+}
+# increment year and/or month appropriately based on month increment
+increment_month() {
+  # pick increment and define/update delta
+  incr=$1
+  (( delta += incr ))
+  # for non-current month
+  if (( incr != 0 )); then
+    # add the increment
+    month=$(( 10#$month + incr ))
+    # normalize month and compute year
+    if (( month > 0 )); then
+      (( month -= 1 ))
+      (( year += month/12 ))
+      (( month %= 12 ))
+      (( month += 1 ))
+    else
+      (( year += month/12 - 1 ))
+      (( month %= 12 ))
+      (( month += 12 ))
+    fi
+  fi
+  # adjust header
+  if (( delta == 0 )); then
+    # today's month => show dd/mm/yyyy
+    header=$(date "$DATEFTM")
+  else
+    # not today's month => show mm/yyyy
+    header=$(cal $month $year | sed -n '1s/^ *\(.*[^ ]\) *$/\1/p')
+  fi
+}
+###### Functions ######
+
+
+###### Main body ######
+get_current_date
+
+# handle the click
+# variables:
+#   current_row: set means today row is highlighted
+#   current_row: not set means...
+#     bias_row ==  0: `next month` row is highlighted
+#     bias_row == -1: `prev month` row is highlighted
+#   selected: contains the selected row (next or prev month)
+#   month_page: the month to be printed
+case "$BLOCK_BUTTON" in
+  1)
+    if [[ $LEFTCLICK_PREV_MONTH == true ]]; then
+      increment_month -1
+      bias_row=-1
+    else
+      increment_month 0
+      current_row=
+    fi
+    ;;
+  2)
+    increment_month 0
+    current_row=
+    ;;
+  3)
+    increment_month +1
+    bias_row=0
+    ;;
+esac
+
+# rofi pop up
+case "$BLOCK_BUTTON" in
+  1|2|3)
+    # as long as prev/next is selected (and the first time also)
+    while [[ "${selected+xxx}" != "xxx" ]] || [[ $selected =~ ($PREV_MONTH_TEXT|$NEXT_MONTH_TEXT) ]]; do
+      IFS=
+      month_page=$(print_month $month $year)
+      if [[ "${current_row+xxx}" = "xxx" ]]; then
+        current_row=$(( $(echo $month_page | grep -n ${day#0} | head -n 1 | cut -d: -f1) - 1 ))
+      else
+        current_row=$(( $(echo $month_page | wc -l) - 1))
+      fi
+
+      # check bar position and adjust anchor accordingly
+      if [[ $BAR_POSITION = "top" ]]; then
+        anchor="northeast"
+      else
+        anchor="southeast"
+      fi
+
+      # open rofi and read the selected row
+      # (add the following option to rofi command with proper config file, if needed)
+      selected="$(echo $month_page \
+        | rofi \
+            -dmenu \
+            -markup-rows \
+            -font $FONT \
+            -m -3 \
+            -theme-str 'window {width: 10%; anchor: '"$anchor"'; location: northwest;}' \
+            -theme-str 'listview {lines: '"$(echo $month_page | wc -l)"' ;scrollbar: false;}' \
+            -theme $ROFI_CONFIG_FILE \
+            -selected-row $(( current_row + bias_row )) \
+            -p "$header")"
+      # select next/prev month if necessary and prepare row to be highlighted
+      [[ $selected =~ $PREV_MONTH_TEXT ]] && { increment_month -1; bias_row=-1; }
+      [[ $selected =~ $NEXT_MONTH_TEXT ]] && { increment_month +1; bias_row=0; }
+      # get ready for successive next/prev month hits
+      unset current_row
+    done
+esac
+
+# print blocklet text
+echo $LABEL$(date "$DATEFTM")
+echo $LABEL$(date "$SHORTFMT")
+###### Main body ######