bugfix: status display, preview annotation

.gitignore

@@ -1 +1,2 @@
 fzf-vcal
+fzf-vcal.debug

src/awk/approx.awk

@@ -10,6 +10,7 @@
 ## 5. filename (collection/name)
 ##
 ## @assign collection_labels: See configuration of the current program.
+## @assign style_line: Style for each line
 
 @include "lib/awk/icalendar.awk"
 
@@ -34,11 +35,11 @@ function fn(path,    n, a) {
 function title(start, summary) {
   summary = getcontent(summary)
   gsub("\n", " ",    summary) # This will be put on a single line
-  gsub("\\t", " ", summary) # we use "\t" as delimiter
+  gsub("\t", "    ", summary) # we use "\t" as delimiter
   depth = split(FILENAME, path, "/")
   collection = depth > 1 ? path[depth-1] : ""
   collection = collection in collection2label ? collection2label[collection] : collection
-  return FAINT "~ " collection " " gensub(/^[^0-9]*([0-9]{4})([0-9]{2}).*$/, "\\1-\\2", "1", start) " " summary OFF
+  return style_line "~ " collection " " gensub(/^[^0-9]*([0-9]{4})([0-9]{2}).*$/, "\\1-\\2", "1", start) " " summary OFF
 }
 
 # AWK program
@@ -52,13 +53,12 @@ BEGIN {
     collection2label[m[1]] = m[2]
   }
   # Colors
-  FAINT = "\033[2m"
   OFF = "\033[m"
 }
 BEGINFILE             { inside = 0; rs = 0; dur = 0; summary = ""; start = "ERROR"; end = "ERROR" }
 /^END:VEVENT/         { print "~", start, dur ? start " " end : end, title(start, summary), fn(FILENAME); nextfile }
-/^DTSTART/ && inside  { start = parse() }
-/^DTEND/ && inside    { end = parse() }
+/^DTSTART/ && inside  { start = parse_dt(getparam($0), getcontent($0)) }
+/^DTEND/ && inside    { end = parse_dt(getparam($0), getcontent($0)) }
 /^DURATION/ && inside { end = parse_duration($NF); dur = 1 }
 /^[^ ]/ && rs         { rs = 0 }
 /^ / && rs            { summary = summary substr($0, 2) }

src/awk/calannot.awk

@@ -3,22 +3,24 @@
 ##
 ## @assign cur: Day-of-month to mark as `today`
 ## @assign day: Day-of-month to highlight
+## @assign style_month: Theme to use for month
+## @assign style_weekdays: Theme to use for weekdays
+## @assign style_cur: Theme to use for current day 
+## @assign style_highlight: Theme to use for highlighted day
 
 BEGIN {
-  BLACK = "\033[1;30m"
-  GREEN = "\033[1;32m"
-  RED = "\033[1;31m"
-  FAINT = "\033[2m"
-  BOLD = "\033[1m"
-  BG = "\033[41m"
   OFF = "\033[m"
   day = day + 0
   cur = cur + 0
 }
-NR == 1 { print GREEN $0 OFF; next }
-NR == 2 { print FAINT $0 OFF; next }
+NR == 1 { print style_month $0 OFF; next }
+NR == 2 { print style_weekdays $0 OFF; next }
 { 
-  sub("\\y"cur"\\y", BG BLACK BOLD cur OFF)
-  sub("\\y"day"\\y", RED BOLD day OFF)
+  if (day == cur) {
+    sub("\\y"cur"\\y", style_highlight style_cur cur OFF)
+  } else {
+    sub("\\y"cur"\\y", style_cur cur OFF)
+    sub("\\y"day"\\y", style_highlight day OFF)
+  }
   print
 }

src/awk/dayview.awk

@@ -21,6 +21,13 @@
 ## @assign today: Date of `today` in the format %D (%m/%d/%y)
 ## @assign daystart: Hour of start of the day
 ## @assign dayend: Hour of end of the day
+## @assign style_allday
+## @assign style_timerange
+## @assign style_confirmed
+## @assign style_tentative
+## @assign style_cancelled
+## @assign style_hour
+## @assign style_emptyhour
 
 # Functions
 
@@ -29,7 +36,7 @@
 # @input status: Event status, one of TENTATIVE, CONFIRMED, CANCELLED
 # @return: Color modifier
 function color_from_status(status) {
-  return status == "CANCELLED" ? STRIKE CYAN : status == "TENTATIVE" ? FAINT CYAN : CYAN
+  return status == "CANCELLED" ? style_cancelled : status == "TENTATIVE" ? style_tentative : style_confirmed
 }
 
 # Return line for all-day event.
@@ -41,7 +48,7 @@ function color_from_status(status) {
 # @return: Single-line string
 function allday(collection, desc, status,    color) {
   color = color_from_status(status)
-  return collection " " LIGHT_CYAN ITALIC FAINT "    (allday)   " OFF color desc OFF
+  return collection " " style_allday color desc OFF
 }
 
 # Return line for multi-day event, or event that starts at midnight, which ends today.
@@ -54,7 +61,7 @@ function allday(collection, desc, status,    color) {
 # @return: Single-line string
 function endstoday(stop, collection, desc, status) {
   color = color_from_status(status)
-  return collection " " LIGHT_CYAN "      → " stop ": " OFF color desc OFF
+  return collection " " style_timerange "      → " stop ": " OFF color desc OFF
 }
 
 # Return line for event that starts sometime today.
@@ -69,9 +76,9 @@ function endstoday(stop, collection, desc, status) {
 function slice(start, stop, collection, desc, status) {
   color = color_from_status(status)
   if (stop == "00:00")
-    return collection " " LIGHT_CYAN start " →      " ": " OFF color desc OFF
+    return collection " " style_timerange start " →      " ": " OFF color desc OFF
    else
-    return collection " " LIGHT_CYAN start " – " stop ": " OFF color desc OFF
+    return collection " " style_timerange start " – " stop ": " OFF color desc OFF
 }
 
 # Print line for a single hour entry.
@@ -79,7 +86,7 @@ function slice(start, stop, collection, desc, status) {
 # @input hour: Hour of the entry
 function hrline(hour) {
   hour = hour < 10 ? "0"hour : hour
-  print today, hour, "", "", "", "   " FAINT hour ":00          ----------------------" OFF
+  print today, hour, "", "", "", "   " style_hou hour ":00" OFF "          " style_emptyhour
 }
 
 # Print lines for hour entries before an event that starts at `start` and stops
@@ -107,11 +114,6 @@ function hrlines(start, stop, h,    starth, stoph, tmp, i) {
 BEGIN {
   FS = "\t"
   OFS = "\t"
-  LIGHT_CYAN = "\033[1;36m"
-  CYAN = "\033[1;36m"
-  ITALIC = "\033[3m"
-  FAINT = "\033[2m"
-  STRIKE = "\033[9m"
   OFF = "\033[m"
 }
 $1 == "00:00" && $2 == "00:00" { print today, $1, $3, $4, $5, allday($6, $7, $8);        next }

src/awk/parse.awk

@@ -48,8 +48,8 @@ BEGIN {
   }
 }
 /^END:VEVENT/ && inside { print_data(start, dur, end, summary); exit }
-/^DTSTART/ && inside    { start = parse() }
-/^DTEND/ && inside      { end = parse() }
+/^DTSTART/ && inside    { start = parse_dt(getparam($0), getcontent($0)) }
+/^DTEND/ && inside      { end = parse_dt(getparam($0), getcontent($0)) }
 /^DURATION/ && inside   { end = parse_duration($NF); dur = 1 }
 /^STATUS/ && inside     { status = $NF }
 /^[^ ]/ && rs           { rs = 0 }

src/awk/weekview.awk

@@ -4,6 +4,10 @@
 ##   printf "%s\t%s\t%s\t%s\n" "$i" "$s" "$e" "$description"
 ##
 ## @assign startofweek: Date of first day in the week
+## @assign style_day: Style for dates
+## @assign style_event_delim: Event delimiter
+## @assign style_summary: Style for summary lines
+## @assign style_time: Style for times
 
 # Functions
 
@@ -12,7 +16,7 @@
 # @input desc: String with a description of the event
 # @return: Single-line string
 function c(desc) {
-  return CYAN desc OFF "  " RED "/" OFF
+  return style_summary desc OFF "  " style_event_delim
 }
 
 # AWK program
@@ -20,19 +24,16 @@ function c(desc) {
 BEGIN {
   FS = "\t"
   OFS = "\t"
-  GREEN = "\033[1;32m"
-  RED = "\033[1;31m"
-  CYAN = "\033[1;36m"
   OFF = "\033[m"
 }
 $2 == "00:00" && $3 == "00:00" { dayline = dayline " " c($4); next }
-$2 == "00:00"                  { dayline = dayline " → " $3 " " c($4); next }
-$3 == "00:00"                  { dayline = dayline " " $2 " → " c($4); next }
-NF == 4                        { dayline = dayline " " $2 " – " $3 " " c($4); next }
+$2 == "00:00"                  { dayline = dayline style_time " → " $3 OFF " " c($4); next }
+$3 == "00:00"                  { dayline = dayline style_time " " $2 " → " OFF c($4); next }
+NF == 4                        { dayline = dayline style_time " " $2 " – " $3 OFF " " c($4); next }
 NF == 1 && dayline             { print "+", startofweek " +" $1-1 " days", "", dayline }
 NF == 1 {
   cmd = "date -d '" startofweek " +" $1 " days' +\"%a %e %b %Y\""
   cmd | getline dayline
   close(cmd)
-  dayline = GREEN dayline ":   " OFF
+  dayline = style_day dayline ":   " OFF
 }

src/lib/awk/icalendar.awk

@@ -5,6 +5,7 @@
 function escape(str)
 {
   gsub("\\\\", "\\\\", str)
+  gsub("\\n",  "\\n",  str)
   gsub(";",    "\\;",  str)
   gsub(",",    "\\,",  str)
   return str
@@ -37,7 +38,7 @@ function print_fold(nameparam, content,    i, s)
 # @input str: String
 # @return: Unescaped string
 function unescape(str,    i, c, c2, res) {
-  for(i=1; i<=length(str);i++) {
+  for(i = 1; i <= length(str); i++) {
     c = substr(str, i, 1)
     if (c != "\\") {
       res = res c
@@ -57,6 +58,17 @@ function unescape(str,    i, c, c2, res) {
   return res
 }
 
+# Isolate parameter part of an iCalendar line.
+#
+# @input str: String
+# @return: Parameter part
+function getparam(str,    i) {
+  i = index(str, ";")
+  if (!i)
+    return ""
+  return substr(str, i + 1, index(str, ":") - i)
+}
+
 # Isolate content part of an iCalendar line, and unescape.
 #
 # @input str: String
@@ -65,22 +77,27 @@ function getcontent(str) {
   return unescape(substr(str, index(str, ":") + 1))
 }
 
-# Time-zone aware parsing of the date/date-time entry at the current record.
+# Time-zone aware parsing of DTSTART or DTEND entries.
 #
-# @local variables: dt
+# @local variables: tz
+# @input dt_param: iCalendar DTSTART or DTEND parameter string
+# @input dt_content: iCalendar DTSTART or DTEND content string
 # @return: date or date-time string that can be used in date (1)
-function parse(    dt) {
-  # Get timezone information
-  for (i=2; i<NF-1; i+=2) {
-    if ($i == "TZID") {
-      dt = "TZ=\"" $(i+1) "\" "
+function parse_dt(dt_param, dt_content,    tz, a, i, k) {
+  if (dt_param) {
+    split(dt_param, a, ";")
+    for (i in a) {
+      k = index(a[i], "=")
+      if (substr(a[i], 1, k-1) == "TZID") {
+        tz = "TZ=\"" substr(a[i], k + 1) "\" "
         break
       }
     }
+  }
   # Get date/date-time
-  return length($NF) == 8 ?
-    dt $NF :
-    dt gensub(/^([0-9]{8})T([0-9]{2})([0-9]{2})([0-9]{2})(Z)?$/, "\\1 \\2:\\3:\\4\\5", "g", $NF)
+  return length(dt_content) == 8 ?
+    dt dt_content :
+    dt gensub(/^([0-9]{8})T([0-9]{2})([0-9]{2})([0-9]{2})(Z)?$/, "\\1 \\2:\\3:\\4\\5", "g", dt_content)
 }
 
 # Map iCalendar duration specification into the format to be used in date (1).

src/main.sh

@@ -32,6 +32,9 @@ EOF
   exit
 fi
 
+# Configuration
+. "sh/config.sh"
+
 # Theme
 . "sh/theme.sh"
 
@@ -50,9 +53,6 @@ fi
 # Reloading command-line options
 . "sh/clireload.sh"
 
-# Configuration
-. "sh/config.sh"
-
 # Access to awk scripts
 . "sh/awkscripts.sh"
 
@@ -68,24 +68,6 @@ fi
 ### Start
 __refresh_data
 
-### Exports
-# The preview calls run in subprocesses. These require the following variables:
-export ROOT CAT AWK_GET AWK_CALSHIFT AWK_CALANNOT CYAN STRIKE FAINT WHITE ITALIC OFF AWK_ATTACHLS
-# The reload commands also run in subprocesses, and use in addition
-export COLLECTION_LABELS DAY_START DAY_END AWK_DAYVIEW AWK_WEEKVIEW AWK_PARSE
-# as well as the following variables that will be dynamically specified. So, we
-# export them in the main loop using the following function.
-
-# __export()
-# Re-export dynamical variables to subshells.
-__export() {
-  DISPLAY_DATE=$(date -R -d "$DISPLAY_DATE")
-  export DISPLAY_DATE WEEKLY_DATA_FILE APPROX_DATA_FILE
-  if [ -n "${TZ:-}" ]; then
-    export TZ
-  fi
-}
-
 ###
 ### Main loop with the command-line argument
 ###   --today
@@ -181,30 +163,34 @@ while true; do
           --accept-nth='1,2,3,4,5' \
           --preview="$0 --preview-event {}" \
           --expect="ctrl-n,ctrl-t,ctrl-g,ctrl-alt-d,esc,backspace,q,alt-v,x,c,a" \
-          --bind="load:pos(1)+transform(
-              echo change-border-label:🗓️ \$(date -d {1} +\"%A %e %B %Y\")
+          --bind='load:pos(1)+transform(
+              echo change-border-label:🗓️ $(date -d {1} +"%A %e %B %Y")
             )+transform(
-              [ -n \"\${TZ:-}\" ] && echo \"change-list-label:\$WHITE\$ITALIC(\$TZ)\$OFF\"
+              [ -n "${TZ:-}" ] && echo "change-list-label:$STYLE_DV_TZ($TZ)$OFF"
             )+transform(
-              [ -n \"\$(echo {} | cut -f 5)\" ] && echo show-preview
-            )" \
+              [ -n {5} ] && echo show-preview
+            )' \
           --bind="start:hide-preview" \
-          --bind="j:down+hide-preview+transform([ -n \"\$(echo {} | cut -f 5)\" ] && echo show-preview)" \
-          --bind="k:up+hide-preview+transform([ -n \"\$(echo {} | cut -f 5)\" ] && echo show-preview)" \
-          --bind="ctrl-j:down+hide-preview+transform([ -n \"\$(echo {} | cut -f 5)\" ] && echo show-preview)" \
-          --bind="ctrl-k:up+hide-preview+transform([ -n \"\$(echo {} | cut -f 5)\" ] && echo show-preview)" \
-          --bind="down:down+hide-preview+transform([ -n \"\$(echo {} | cut -f 5)\" ] && echo show-preview)" \
-          --bind="up:up+hide-preview+transform([ -n \"\$(echo {} | cut -f 5)\" ] && echo show-preview)" \
-          --bind="l:hide-preview+reload:$0 --reload-day {1} '+1 day'" \
-          --bind="h:hide-preview+reload:$0 --reload-day {1} '-1 day'" \
-          --bind="right:hide-preview+reload:$0 --reload-day {1} '+1 day'" \
-          --bind="left:hide-preview+reload:$0 --reload-day {1} '-1 day'" \
-          --bind="ctrl-l:hide-preview+reload:$0 --reload-day {1} '+1 week'" \
-          --bind="ctrl-h:hide-preview+reload:$0 --reload-day {1} '-1 week'" \
-          --bind="alt-l:hide-preview+reload:$0 --reload-day {1} '+1 month'" \
-          --bind="alt-h:hide-preview+reload:$0 --reload-day {1} '-1 month'" \
-          --bind="ctrl-r:hide-preview+reload:$0 --reload-day today" \
+          --bind="j:down" \
+          --bind="k:up" \
+          --bind="l:reload:$0 --reload-day {1} '+1 day'" \
+          --bind="h:reload:$0 --reload-day {1} '-1 day'" \
+          --bind="right:reload:$0 --reload-day {1} '+1 day'" \
+          --bind="left:reload:$0 --reload-day {1} '-1 day'" \
+          --bind="ctrl-l:reload:$0 --reload-day {1} '+1 week'" \
+          --bind="ctrl-h:reload:$0 --reload-day {1} '-1 week'" \
+          --bind="alt-l:reload:$0 --reload-day {1} '+1 month'" \
+          --bind="alt-h:reload:$0 --reload-day {1} '-1 month'" \
+          --bind="ctrl-r:reload:$0 --reload-day today" \
           --bind="ctrl-s:execute($SYNC_CMD ; printf 'Press <enter> to continue.'; read -r tmp)" \
+          --bind='tab:down' \
+          --bind='shift-tab:up' \
+          --bind='focus:hide-preview+transform(
+            [ "$FZF_KEY" = "tab" ] && [ -z {5} ] && [ "$FZF_POS" -lt "$FZF_TOTAL_COUNT" ] && echo down
+            [ "$FZF_KEY" = "shift-tab" ] && [ -z {5} ] && [ "$FZF_POS" -gt "1" ] && echo up
+            )+transform(
+              [ -n {5} ] && echo show-preview
+            )' \
           --bind="w:toggle-preview-wrap" \
           --bind="ctrl-d:preview-down" \
           --bind="ctrl-u:preview-up"
@@ -257,7 +243,7 @@ while true; do
             --print-query \
             --bind="start:hide-input" \
             --bind="ctrl-alt-d:show-input+change-query(ctrl-alt-d)+accept" \
-            --bind="load:transform:[ \"\$FZF_TOTAL_COUNT\" -eq 0 ] && echo 'unbind(enter)+unbind(ctrl-alt-d)'" \
+            --bind='load:transform:[ "$FZF_TOTAL_COUNT" -eq 0 ] && echo "unbind(enter)+unbind(ctrl-alt-d)"' \
             --bind="w:toggle-wrap" \
             --bind="j:down" \
             --bind="k:up" ||
@@ -381,21 +367,21 @@ while true; do
           --info=right \
           --margin="1" \
           --info-command="printf \"$(date +"%R %Z")\"; [ -n \"\${TZ:-}\" ] && printf \" (\$TZ)\"" \
-          --preview-window=up,7,border-bottom \
+          --preview-window=up,8,border-bottom \
           --preview="$0 --preview-week {}" \
-          --bind="load:pos($DISPLAY_POS)" \
+          --bind="load:pos($DISPLAY_POS)+unbind(load)" \
           --expect="ctrl-n,ctrl-g,ctrl-t" \
           --bind="q:abort" \
           --bind="j:down" \
           --bind="k:up" \
-          --bind="l:unbind(load)+reload:$0 --reload-week {2} '+1 week'" \
-          --bind="h:unbind(load)+reload:$0 --reload-week {2} '-1 week'" \
-          --bind="right:unbind(load)+reload:$0 --reload-week {2} '+1 week'" \
-          --bind="left:unbind(load)+reload:$0 --reload-week {2} '-1 week'" \
-          --bind="ctrl-l:unbind(load)+reload:$0 --reload-week {2} '+1 month'" \
-          --bind="ctrl-h:unbind(load)+reload:$0 --reload-week {2} '-1 month'" \
-          --bind="alt-l:unbind(load)+reload:$0 --reload-week {2} '+1 year'" \
-          --bind="alt-h:unbind(load)+reload:$0 --reload-week {2} '-1 year'" \
+          --bind="l:reload:$0 --reload-week {2} '+1 week'" \
+          --bind="h:reload:$0 --reload-week {2} '-1 week'" \
+          --bind="right:reload:$0 --reload-week {2} '+1 week'" \
+          --bind="left:reload:$0 --reload-week {2} '-1 week'" \
+          --bind="ctrl-l:reload:$0 --reload-week {2} '+1 month'" \
+          --bind="ctrl-h:reload:$0 --reload-week {2} '-1 month'" \
+          --bind="alt-l:reload:$0 --reload-week {2} '+1 year'" \
+          --bind="alt-h:reload:$0 --reload-week {2} '-1 year'" \
           --bind="ctrl-r:rebind(load)+reload($0 --reload-week today)+show-preview" \
           --bind="ctrl-s:execute($SYNC_CMD ; printf 'Press <enter> to continue.'; read -r tmp)" \
           --bind="/:show-input+unbind(q)+unbind(j)+unbind(k)+unbind(l)+unbind(h)+unbind(ctrl-l)+unbind(ctrl-h)+unbind(alt-l)+unbind(alt-h)+unbind(load)+hide-preview+reload:$0 --reload-all" \

src/sh/awkscripts.sh

@@ -20,87 +20,102 @@ AWK_APPROX=$(
 @@include awk/approx.awk
 EOF
 )
+export AWK_APPROX
 
 AWK_MERGE=$(
   cat <<'EOF'
 @@include awk/merge.awk
 EOF
 )
+export AWK_MERGE
 
 AWK_PARSE=$(
   cat <<'EOF'
 @@include awk/parse.awk
 EOF
 )
+export AWK_PARSE
 
 AWK_WEEKVIEW=$(
   cat <<'EOF'
 @@include awk/weekview.awk
 EOF
 )
+export AWK_WEEKVIEW
 
 AWK_DAYVIEW=$(
   cat <<'EOF'
 @@include awk/dayview.awk
 EOF
 )
+export AWK_DAYVIEW
 
 AWK_GET=$(
   cat <<'EOF'
 @@include awk/get.awk
 EOF
 )
+export AWK_GET
 
 AWK_UPDATE=$(
   cat <<'EOF'
 @@include awk/update.awk
 EOF
 )
+export AWK_UPDATE
 
 AWK_NEW=$(
   cat <<'EOF'
 @@include awk/new.awk
 EOF
 )
+export AWK_NEW
 
 AWK_CALSHIFT=$(
   cat <<'EOF'
 @@include awk/calshift.awk
 EOF
 )
+export AWK_CALSHIFT
 
 AWK_CALANNOT=$(
   cat <<'EOF'
 @@include awk/calannot.awk
 EOF
 )
+export AWK_CALANNOT
 
 AWK_SET=$(
   cat <<'EOF'
 @@include awk/set.awk
 EOF
 )
+export AWK_SET
 
 AWK_ATTACHLS=$(
   cat <<'EOF'
 @@include awk/attachls.awk
 EOF
 )
+export AWK_ATTACHLS
 
 AWK_ATTACHDD=$(
   cat <<'EOF'
 @@include awk/attachdd.awk
 EOF
 )
+export AWK_ATTACHDD
 
 AWK_ATTACHRM=$(
   cat <<'EOF'
 @@include awk/attachrm.awk
 EOF
 )
+export AWK_ATTACHRM
 
 AWK_ATTACH=$(
   cat <<'EOF'
 @@include awk/attach.awk
 EOF
 )
+export AWK_ATTACH

src/sh/clipreview.sh

@@ -21,9 +21,9 @@ if [ "${1:-}" = "--preview-event" ]; then
     elif [ "$status" = "CANCELLED" ]; then
       symb="❌"
     fi
-    echo "📅${symb:-} ${CYAN}$start${OFF} → ${CYAN}$end${OFF}"
+    echo "📅${symb:-} ${STYLE_EPV_DATETIME}$start${OFF} → ${STYLE_EPV_DATETIME}$end${OFF}"
     if [ -n "${location:-}" ]; then
-      echo "📍 ${CYAN}$location${OFF}"
+      echo "📍 ${STYLE_EPV_LOCATION}$location${OFF}"
     fi
     attcnt=$(awk "$AWK_ATTACHLS" "$fpath" | wc -l)
     if [ "$attcnt" -gt 0 ]; then
@@ -88,13 +88,13 @@ if [ "${1:-}" = "--preview-week" ]; then
     fi
     # show
     (
-      cal "$month_pre2" "$year_pre2" | awk "$AWK_CALSHIFT" | awk -v cur="${var_pre2:-}" "$AWK_CALANNOT"
-      cal "$month_pre" "$year_pre" | awk "$AWK_CALSHIFT" | awk -v cur="${var_pre:-}" "$AWK_CALANNOT"
-      cal "$month" "$year" | awk "$AWK_CALSHIFT" | awk -v cur="${var:-}" -v day="$day" "$AWK_CALANNOT"
-      cal "$month_nex" "$year_nex" | awk "$AWK_CALSHIFT" | awk -v cur="${var_nex:-}" "$AWK_CALANNOT"
-      cal "$month_nex2" "$year_nex2" | awk "$AWK_CALSHIFT" | awk -v cur="${var_nex2:-}" "$AWK_CALANNOT"
-      cal "$month_nex3" "$year_nex3" | awk "$AWK_CALSHIFT" | awk -v cur="${var_nex3:-}" "$AWK_CALANNOT"
-    ) | awk '{ l[NR%8] = l[NR%8] "    " $0 } END {for (i in l) if (i>0) print l[i] }'
+      cal "$month_pre2" "$year_pre2" | awk "$AWK_CALSHIFT" | awk -v cur="${var_pre2:-}" -v style_month="$STYLE_CALENDAR_MONTH" -v style_weekdays="$STYLE_CALENDAR_WEEKDAYS" -v style_cur="$STYLE_CALENDAR_CURRENT_DAY" -v style_highlight="$STYLE_CALENDAR_HL_DAY" -v style_weekdays="$STYLE_CALENDAR_WEEKDAYS" -v style_cur="$STYLE_CALENDAR_CURRENT_DAY" -v style_highlight="$STYLE_CALENDAR_HL_DAY" "$AWK_CALANNOT"
+      cal "$month_pre" "$year_pre" | awk "$AWK_CALSHIFT" | awk -v cur="${var_pre:-}" -v style_month="$STYLE_CALENDAR_MONTH" -v style_weekdays="$STYLE_CALENDAR_WEEKDAYS" -v style_cur="$STYLE_CALENDAR_CURRENT_DAY" -v style_highlight="$STYLE_CALENDAR_HL_DAY" "$AWK_CALANNOT"
+      cal "$month" "$year" | awk "$AWK_CALSHIFT" | awk -v cur="${var:-}" -v day="$day" -v style_month="$STYLE_CALENDAR_MONTH" -v style_weekdays="$STYLE_CALENDAR_WEEKDAYS" -v style_cur="$STYLE_CALENDAR_CURRENT_DAY" -v style_highlight="$STYLE_CALENDAR_HL_DAY" "$AWK_CALANNOT"
+      cal "$month_nex" "$year_nex" | awk "$AWK_CALSHIFT" | awk -v cur="${var_nex:-}" -v style_month="$STYLE_CALENDAR_MONTH" -v style_weekdays="$STYLE_CALENDAR_WEEKDAYS" -v style_cur="$STYLE_CALENDAR_CURRENT_DAY" -v style_highlight="$STYLE_CALENDAR_HL_DAY" "$AWK_CALANNOT"
+      cal "$month_nex2" "$year_nex2" | awk "$AWK_CALSHIFT" | awk -v cur="${var_nex2:-}" -v style_month="$STYLE_CALENDAR_MONTH" -v style_weekdays="$STYLE_CALENDAR_WEEKDAYS" -v style_cur="$STYLE_CALENDAR_CURRENT_DAY" -v style_highlight="$STYLE_CALENDAR_HL_DAY" "$AWK_CALANNOT"
+      cal "$month_nex3" "$year_nex3" | awk "$AWK_CALSHIFT" | awk -v cur="${var_nex3:-}" -v style_month="$STYLE_CALENDAR_MONTH" -v style_weekdays="$STYLE_CALENDAR_WEEKDAYS" -v style_cur="$STYLE_CALENDAR_CURRENT_DAY" -v style_highlight="$STYLE_CALENDAR_HL_DAY" "$AWK_CALANNOT"
+    ) | awk '{ l[(NR-1)%8] = l[(NR-1)%8] "    " $0 } END {for (i in l) print l[i] }'
   fi
   exit
 fi

src/sh/config.sh

@@ -20,15 +20,16 @@ if [ -z "${ROOT:-}" ] || [ -z "${COLLECTION_LABELS:-}" ]; then
   err "Configuration is incomplete."
   exit 1
 fi
-SYNC_CMD=${SYNC_CMD:-echo 'Synchronization disabled'}
-DAY_START=${DAY_START:-8}
-DAY_END=${DAY_END:-18}
-ZI_DIR=${ZI_DIR:-/usr/share/zoneinfo/posix}
+export ROOT COLLECTION_LABELS
+export SYNC_CMD=${SYNC_CMD:-echo 'Synchronization disabled'}
+export DAY_START=${DAY_START:-8}
+export DAY_END=${DAY_END:-18}
+export ZI_DIR=${ZI_DIR:-/usr/share/zoneinfo/posix}
 if [ ! -d "$ZI_DIR" ]; then
   err "Could not determine time-zone information"
   exit 1
 fi
-OPEN=${OPEN:-open}
+export OPEN=${OPEN:-open}
 
 # Check and load required tools
 # - FZF:     Fuzzy finder `fzf``
@@ -39,14 +40,14 @@ OPEN=${OPEN:-open}
 # The presence of POSIX tools is not checked.
 
 if command -v "fzf" >/dev/null; then
-  FZF="fzf --black"
+  export FZF="fzf --black"
 else
   err "Did not find the command-line fuzzy finder fzf."
   exit 1
 fi
 
 if command -v "uuidgen" >/dev/null; then
-  UUIDGEN="uuidgen"
+  export UUIDGEN="uuidgen"
 else
   err "Did not find the uuidgen command."
   exit 1
@@ -58,8 +59,8 @@ elif command -v "batcat" >/dev/null; then
   CAT="batcat"
 fi
 CAT=${CAT:+$CAT --color=always --style=numbers --language=md}
-CAT=${CAT:-cat}
+export CAT=${CAT:-cat}
 
 if command -v "git" >/dev/null && [ -d "$ROOT/.git" ]; then
-  GIT="git -C $ROOT"
+  export GIT="git -C $ROOT"
 fi

src/sh/icalendar.sh

@@ -12,15 +12,12 @@
 # @input $1: Start date/date-time
 # @input $2: End date/date-time
 # @input $3: Path to iCalendar file (relative to `$ROOT`)
-# @req $AWK_GET:    Awk script to extract fields from iCalendar file
-# @req $AWK_UPDATE: Awk script to update iCalendar file
-# @req $EDITOR:     Environment variable of your favorite editor
 __edit() {
   start=$(__datetime_human_machine "$1")
   end=$(__datetime_human_machine "$2")
   fpath="$ROOT/$3"
-  location=$(awk -v field="LOCATION" "$AWK_GET" "$fpath")
-  summary=$(awk -v field="SUMMARY" "$AWK_GET" "$fpath")
+  location=$(awk -v field="LOCATION" "$AWK_GET" "$fpath" | tr -d "\n")
+  summary=$(awk -v field="SUMMARY" "$AWK_GET" "$fpath" | tr -d "\n")
   description=$(awk -v field="DESCRIPTION" "$AWK_GET" "$fpath")
   filetmp=$(mktemp --suffix='.md')
   printf "::: |> %s\n::: <| %s\n" "$start" "$end" >"$filetmp"
@@ -61,12 +58,6 @@ __edit() {
 # If the user specified a malformed date/date-time, we fail.
 #
 # @input $1 (optional): Date or datetime, defaults to today.
-# @req $COLLECTION_LABELS: Mapping between collections and lables (see configuration)
-# @req $UUIDGEN:           `uuidgen` command
-# @req $ROOT:              Path that contains the collections (see configuration)
-# @req $EDITOR:            Environment variable of your favorite editor
-# @req $AWK_GET:           Awk script to extract fields from iCalendar file
-# @req $AWK_new:           Awk script to generate iCalendar file
 __new() {
   collection=$(echo "$COLLECTION_LABELS" | tr ';' '\n' | awk '/./ {print}' | $FZF --margin="30%" --no-info --delimiter='=' --with-nth=2 --accept-nth=1)
   fpath=""
@@ -119,8 +110,6 @@ __new() {
 # Delete iCalendar file
 #
 # @input $1: Path to iCalendar file, relative to `$ROOT`
-# @req $ROOT: Path that contains the collections (see configuration)
-# @req $AWK_GET: Awk script to extract fields from iCalendar file
 __delete() {
   fpath="$ROOT/$1"
   summary=$(awk -v field="SUMMARY" "$AWK_GET" "$fpath")
@@ -152,9 +141,6 @@ __delete() {
 #
 # @input $1: path to iCalendar file
 # @input $2: collection name
-# @req $ROOT: Path that contains the collections (see configuration)
-# @req $UUIDGEN: `uuidgen` command
-# @req $AWK_SET: Awk script to set field value
 __import_to_collection() {
   file="$1"
   collection="$2"
@@ -175,9 +161,6 @@ __import_to_collection() {
 # Set status of appointment to CANCELLED or CONFIRMED (toggle)
 #
 # @input $1: path to iCalendar file
-# @req $ROOT: Path that contains the collections (see configuration)
-# @req $AWK_SET: Awk script to set field value
-# @req $AWK_GET: Awk script to extract fields from iCalendar file
 __cancel_toggle() {
   fpath="$ROOT/$1"
   status=$(awk -v field="STATUS" "$AWK_GET" "$fpath")
@@ -197,9 +180,6 @@ __cancel_toggle() {
 # Toggle status flag: CONFIRMED <-> TENTATIVE
 #
 # @input $1: path to iCalendar file
-# @req $ROOT: Path that contains the collections (see configuration)
-# @req $AWK_SET: Awk script to set field value
-# @req $AWK_GET: Awk script to extract fields from iCalendar file
 __tentative_toggle() {
   fpath="$ROOT/$1"
   status=$(awk -v field="STATUS" "$AWK_GET" "$fpath")
@@ -219,9 +199,6 @@ __tentative_toggle() {
 # Prepend attachment to iCalendar file
 #
 # @input $1: path to iCalendar file
-# @req $ROOT: Path that contains the collections (see configuration)
-# @req $FZF: Fuzzy finder
-# @req $AWK_ATTACH: Awk script to add attachment
 __add_attachment() {
   fpath="$ROOT/$1"
   sel=$(

src/sh/load.sh

@@ -9,6 +9,7 @@ __load_approx_data() {
     xargs -0 -P0 \
       awk \
       -v collection_labels="$COLLECTION_LABELS" \
+      -v style_line="$STYLE_LV" \
       "$AWK_APPROX"
 }
 
@@ -27,15 +28,18 @@ __load_weeks() {
 # file `$APPROX_DATA_FILE` and the output of `__load_weeks` in the temporary
 # file `@WEEKLY_DATA_FILE`.
 __refresh_data() {
-  if [ -n "${APPROX_DATA_FILE:-}" ]; then
-    rm -f "$APPROX_DATA_FILE"
-  fi
-  if [ -n "${WEEKLY_DATA_FILE:-}" ]; then
-    rm -f "$WEEKLY_DATA_FILE"
-  fi
+  if [ -z "${APPROX_DATA_FILE:-}" ]; then
     APPROX_DATA_FILE=$(mktemp)
-  __load_approx_data >"$APPROX_DATA_FILE"
+    trap 'rm -f "$APPROX_DATA_FILE"' EXIT INT
+  fi
+  if [ -z "${WEEKLY_DATA_FILE:-}" ]; then
     WEEKLY_DATA_FILE=$(mktemp)
+    trap 'rm -f "$WEEKLY_DATA_FILE"' EXIT INT
+  fi
+  debug "__refresh_data(): going to load approx data"
+  __load_approx_data >"$APPROX_DATA_FILE"
+  debug "__refresh_data(): approx data loaded"
+  debug "__refresh_data(): going to load weeks"
   __load_weeks >"$WEEKLY_DATA_FILE"
-  trap 'rm -f "$APPROX_DATA_FILE" "$WEEKLY_DATA_FILE"' EXIT INT
+  debug "__refresh_data(): weeks loaded"
 }

src/sh/misc.sh

@@ -6,6 +6,14 @@ err() {
   echo "❌ $1" >/dev/tty
 }
 
+# debug()
+# Pring debug message to fzf-vcal.debug
+#
+# @input $1: Debug message
+debug() {
+  echo "$(date +"%D %T.%N"): $1" >>"/tmp/fzf-vcal.debug"
+}
+
 # Print date or datetime in a human and machine readable form.
 #
 # @input $1: Seconds since epoch
@@ -25,3 +33,12 @@ __datetime_human_machine() {
 __summary_for_commit() {
   awk -v field="SUMMARY" "$AWK_GET" "$1" | tr -c -d "[:alnum:][:blank:]" | head -c 15
 }
+
+# Re-export dynamical variables to subshells.
+__export() {
+  DISPLAY_DATE=$(date -R -d "$DISPLAY_DATE")
+  export DISPLAY_DATE
+  if [ -n "${TZ:-}" ]; then
+    export TZ
+  fi
+}

src/sh/theme.sh

@@ -1,8 +1,47 @@
+# Colors
 GREEN="\033[1;32m"
+BLACK="\033[1;30m"
 RED="\033[1;31m"
 WHITE="\033[1;97m"
 CYAN="\033[1;36m"
+LIGHT_CYAN="\033[1;36m"
 STRIKE="\033[9m"
 ITALIC="\033[3m"
 FAINT="\033[2m"
-OFF="\033[m"
+BOLD="\033[1m"
+BG="\033[41m"
+
+export OFF="\033[m"
+
+# Style
+# Calendar
+export STYLE_CALENDAR_MONTH="${STYLE_CALENDAR_MONTH:-$GREEN}"
+export STYLE_CALENDAR_WEEKDAYS="${STYLE_CALENDAR_WEEKDAYS:-$FAINT}"
+export STYLE_CALENDAR_CURRENT_DAY="${STYLE_CALENDAR_CURRENT_DAY:-$BLACK$BG}"
+export STYLE_CALENDAR_HL_DAY="${STYLE_CALENDAR_HL_DAY:-$BOLD$RED}"
+
+# Week view
+export STYLE_WV_DAY="${STYLE_WV_DAY:-$GREEN}"
+export STYLE_WV_EVENT_DELIM="${STYLE_WV_EVENT_DELIM:-$RED / $OFF}"
+export STYLE_WV_SUMMARY="${STYLE_WV_SUMMARY:-$CYAN}"
+export STYLE_WV_TIME="${STYLE_WV_TIME:-$WHITE}"
+export STYLE_WV_CONFIRMED="${STYLE_WV_CONFIRMED:-$CYAN}"
+export STYLE_WV_TENTATIVE="${STYLE_WV_TENTATIVE:-$FAINT$CYAN}"
+export STYLE_WV_CANCELLED="${STYLE_WV_CANCELLED:-$STRIKE$FAINT$CYAN}"
+
+# List view
+export STYLE_LV="${STYLE_LV:-$FAINT}"
+
+# Day view
+export STYLE_DV_ALLDAY="${STYLE_DV_ALLDAY:-$LIGHT_CYAN$ITALIC$FAINT    (allday)   $OFF}"
+export STYLE_DV_TIME="${STYLE_DV_TIME:-$LIGHT_CYAN}"
+export STYLE_DV_CONFIRMED="${STYLE_DV_CONFIRMED:-$CYAN}"
+export STYLE_DV_TENTATIVE="${STYLE_DV_TENTATIVE:-$FAINT$CYAN}"
+export STYLE_DV_CANCELLED="${STYLE_DV_CANCELLED:-$STRIKE$FAINT$CYAN}"
+export STYLE_DV_HOUR="${STYLE_DV_HOUR:-$FAINT}"
+export STYLE_DV_EMPTYHOUR="${STYLE_DV_EMPTYHOUR:-$FAINT----------------------$OFF}"
+export STYLE_DV_TZ="$WHITE$ITALIC"
+
+# Event preview
+export STYLE_EPV_DATETIME="${STYLE_EPV_DATETIME:-$CYAN}"
+export STYLE_EPV_LOCATION="${STYLE_EPV_LOCATION:-$GREEN}"

src/sh/view.sh

@@ -58,29 +58,41 @@ __view_day() {
       else
         continue
       fi
-      printf "%s\t%s\t%s\t%s\t%s\t%s\t%s\%s\n" "$s" "$e" "$starttime" "$endtime" "$fpath" "$collection" "$description" "$status"
+      printf "%s\t%s\t%s\t%s\t%s\t%s\t%s\t%s\n" "$s" "$e" "$starttime" "$endtime" "$fpath" "$collection" "$description" "$status"
     done)
   fi
-  echo "$sef" | sort -n | awk -v today="$today" -v daystart="$DAY_START" -v dayend="$DAY_END" "$AWK_DAYVIEW"
+  echo "$sef" | sort -n | awk \
+    -v today="$today" \
+    -v daystart="$DAY_START" \
+    -v dayend="$DAY_END" \
+    -v style_allday="$STYLE_DV_ALLDAY" \
+    -v style_timerange="$STYLE_DV_TIME" \
+    -v style_confirmed="$STYLE_DV_CONFIRMED" \
+    -v style_tentative="$STYLE_DV_TENTATIVE" \
+    -v style_cancelled="$STYLE_DV_CANCELLED" \
+    -v style_hour="$STYLE_DV_HOUR" \
+    -v style_emptyhour="$STYLE_DV_EMPTYHOUR" \
+    "$AWK_DAYVIEW"
 }
 
 # This function prints the view for the week that contains the day specified in `$DISPLAY_DATE`.
 __view_week() {
+  debug "__view_week(): Enter"
   weeknr=$(date -d "$DISPLAY_DATE" +"%G:%V:")
   files=$(grep "^$weeknr" "$WEEKLY_DATA_FILE" | cut -f 2)
   dayofweek=$(date -d "$DISPLAY_DATE" +"%u")
   delta=$((1 - dayofweek))
   startofweek=$(date -d "$DISPLAY_DATE -$delta days" +"%D")
   # loop over files
+  debug "__view_week(): loop over files"
   sef=$({
-    set -- $files
-    for file in "$@"; do
-      file="$ROOT/$file"
+    printf "%s" "$files" | xargs -d " " -I {} -P0 \
       awk \
       -v collection_labels="$COLLECTION_LABELS" \
-        "$AWK_PARSE" "$file"
-    done
+      "$AWK_PARSE" "$ROOT/{}"
   })
+  debug "__view_week(): loop over files ended"
+  debug "__view_week(): prepare week view"
   if [ -n "$sef" ]; then
     sef=$(echo "$sef" | while IFS= read -r line; do
       set -- $line
@@ -95,11 +107,11 @@ __view_week() {
       status="$1"
       shift
       if [ "$status" = "TENTATIVE" ]; then
-        symb="$FAINT$CYAN"
+        symb="$STYLE_WV_TENTATIVE"
       elif [ "$status" = "CANCELLED" ]; then
-        symb="$STRIKE"
+        symb="$STYLE_WV_CANCELLED"
       else
-        symb=""
+        symb="$STYLE_WV_CONFIRMED"
       fi
       description="${symb:-}$*$OFF"
       for i in $(seq 0 7); do
@@ -123,11 +135,20 @@ __view_week() {
       done
     done)
   fi
+  debug "__view_week(): prepare week view ended"
+  debug "__view_week(): generate week view"
   sef=$({
     echo "$sef"
     seq 0 7
   } | sort -n)
-  echo "$sef" | awk -v startofweek="$startofweek" "$AWK_WEEKVIEW"
+  echo "$sef" | awk \
+    -v startofweek="$startofweek" \
+    -v style_day="$STYLE_WV_DAY" \
+    -v style_event_delim="$STYLE_WV_EVENT_DELIM" \
+    -v style_summary="$STYLE_WV_SUMMARY" \
+    -v style_time="$STYLE_WV_TIME" \
+    "$AWK_WEEKVIEW"
+  debug "__view_week(): generate week view ended"
 }
 
 # This function prints all entries.