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tzselect: User input/output through one function
Which can be 'overriden' in the calling process as $SHOWDIALOG
With this, tzselect can be used by other scripts with a customized
user dialog. Better solutions are welcome!
Example call:
SHOWDIALOG=$PWD/tzselect_dialog tzselect
where tzselect_dialog imitates the function showdialog() of tzselect.
see: https://github.com/Wuodan/tz/commit/5297b9ca06f79c334b9492713ce388b590e436e3
This file was created using:
git diff 3da9649d321d9208badaf941fc59ae93b42bb4c7 54b3d917f406db7d31bfd0f4b4db8d529fa3d619 tzselect.ksh
diff --git a/tzselect.ksh b/tzselect.ksh
index 3acdebd..9280fb9 100644
--- a/tzselect.ksh
+++ b/tzselect.ksh
@@ -36,6 +36,7 @@ REPORT_BUGS_TO=tz@iana.org
# Specify default values for environment variables if they are unset.
: ${AWK=awk}
: ${TZDIR=`pwd`}
+: ${SHOWDIALOG=showdialog}
# Check for awk Posix compliance.
($AWK -v x=y 'BEGIN { exit 123 }') </dev/null >/dev/null 2>&1
@@ -73,9 +74,10 @@ Options:
Report bugs to $REPORT_BUGS_TO."
# Ask the user to select from the function's arguments,
-# and assign the selected argument to the variable 'select_result'.
+# and print selected argument
# Exit on EOF or I/O error. Use the shell's 'select' builtin if available,
# falling back on a less-nice but portable substitute otherwise.
+# First argument is the message preceeding the selection
if
case $BASH_VERSION in
?*) : ;;
@@ -88,11 +90,15 @@ then
# even though it is never executed.
eval '
doselect() {
+ # print message first
+ echo >&2 "${1}"
+ shift
select select_result
do
case $select_result in
"") echo >&2 "Please enter a number in range." ;;
- ?*) break
+ # print result
+ ?*) echo -n "${select_result}"; break
esac
done || exit
}
@@ -107,6 +113,9 @@ then
'
else
doselect() {
+ # print message first
+ echo >&2 "${1}"
+ shift
# Field width of the prompt numbers.
select_width=`expr $# : '.*'`
@@ -128,6 +137,8 @@ else
if test 1 -le $select_i && test $select_i -le $#; then
shift `expr $select_i - 1`
select_result=$1
+ # print result
+ echo -n "${select_result}"
break
fi
echo >&2 'Please enter a number in range.'
@@ -140,6 +151,38 @@ else
}
fi
+# showdialog()
+# All normal user input/output goes through this function
+#
+# The user dialog of this script can be altered by setting
+# the SHOWDIALOG variable as in:
+# SHOWDIALOG=$PWD/tzselect_dialog tzselect
+# where 'tzselect_dialog' imitates this function
+#
+# Arguments:
+# Type: one of: menu, yesno, msgbox, inputbox
+# Message: text to display
+# Options: menu-options, only for types menu and yesno
+#
+showdialog() {
+ # action depends on first argument
+ case "${1}" in
+ menu|yesno)
+ shift
+ doselect "${@}"
+ return $? ;;
+ msgbox)
+ echo >&2 "${2}"
+ return 0 ;;
+ inputbox)
+ echo >&2 "${2}"
+ read INPUTBOX
+ echo -n "${INPUTBOX}"
+ return 0 ;;
+ esac
+ return 1
+}
+
while getopts c:n:t:-: opt
do
case $opt$OPTARG in
@@ -270,8 +313,7 @@ output_distances='
# Begin the main loop. We come back here if the user wants to retry.
while
- echo >&2 'Please identify a location' \
- 'so that time zone rules can be set correctly.'
+ dialogtext='Please identify a location so that time zone rules can be set correctly.'
continent=
country=
@@ -284,7 +326,8 @@ while
# Ask the user for continent or ocean.
- echo >&2 'Please select a continent, ocean, "coord", or "TZ".'
+ dialogtext="${dialogtext}
+Please select a continent, ocean, \"coord\", or \"TZ\"."
quoted_continents=`
$AWK '
@@ -304,10 +347,9 @@ while
`
eval '
- doselect '"$quoted_continents"' \
+ continent=`"${SHOWDIALOG}" menu '\'"${dialogtext}"\'' '"$quoted_continents"' \
"coord - I want to use geographical coordinates." \
- "TZ - I want to specify the time zone using the Posix TZ format."
- continent=$select_result
+ "TZ - I want to specify the time zone using the Posix TZ format."` || exit $?
case $continent in
Americas) continent=America;;
*" "*) continent=`expr "$continent" : '\''\([^ ]*\)'\''`
@@ -319,11 +361,9 @@ while
TZ)
# Ask the user for a Posix TZ string. Check that it conforms.
while
- echo >&2 'Please enter the desired value' \
- 'of the TZ environment variable.'
- echo >&2 'For example, GST-10 is a zone named GST' \
- 'that is 10 hours ahead (east) of UTC.'
- read TZ
+ TZ=`"${SHOWDIALOG}" inputbox \
+ 'Please enter the desired value of the TZ environment variable.
+For example, GST-10 is a zone named GST that is 10 hours ahead (east) of UTC.'` || exit $?
$AWK -v TZ="$TZ" 'BEGIN {
tzname = "[^-+,0-9][^-+,0-9][^-+,0-9]+"
time = "[0-2]?[0-9](:[0-5][0-9](:[0-5][0-9])?)?"
@@ -336,8 +376,8 @@ while
exit 0
}'
do
- echo >&2 "'$TZ' is not a conforming" \
- 'Posix time zone string.'
+ "${SHOWDIALOG}" msgbox \
+ "'$TZ' is not a conforming Posix time zone string."
done
TZ_for_date=$TZ;;
*)
@@ -345,12 +385,10 @@ while
coord)
case $coord in
'')
- echo >&2 'Please enter coordinates' \
- 'in ISO 6709 notation.'
- echo >&2 'For example, +4042-07403 stands for'
- echo >&2 '40 degrees 42 minutes north,' \
- '74 degrees 3 minutes west.'
- read coord;;
+ coord=`"${SHOWDIALOG}" inputbox \
+ 'Please enter coordinates in ISO 6709 notation.
+For example, +4042-07403 stands for
+40 degrees 42 minutes north, 74 degrees 3 minutes west.'` || exit $?
esac
distance_table=`$AWK \
-v coord="$coord" \
@@ -363,12 +401,10 @@ while
BEGIN { FS = "\t" }
{ print $NF }
'`
- echo >&2 'Please select one of the following' \
- 'time zone regions,'
- echo >&2 'listed roughly in increasing order' \
- "of distance from $coord".
- doselect $regions
- region=$select_result
+ region=`"${SHOWDIALOG}" menu \
+ "Please select one of the following time zone regions,
+listed roughly in increasing order of distance from $coord." \
+ $regions` || exit $?
TZ=`echo "$distance_table" | $AWK -v region="$region" '
BEGIN { FS="\t" }
$NF == region { print $4 }
@@ -405,10 +441,9 @@ while
# If there's more than one country, ask the user which one.
case $countries in
*"$newline"*)
- echo >&2 'Please select a country' \
- 'whose clocks agree with yours.'
- doselect $countries
- country=$select_result;;
+ country=`"${SHOWDIALOG}" menu \
+ 'Please select a country whose clocks agree with yours.' \
+ $countries` || exit $?;;
*)
country=$countries
esac
@@ -436,10 +471,9 @@ while
# If there's more than one region, ask the user which one.
case $regions in
*"$newline"*)
- echo >&2 'Please select one of the following' \
- 'time zone regions.'
- doselect $regions
- region=$select_result;;
+ region=`"${SHOWDIALOG}" menu \
+ 'Please select one of the following time zone regions.' \
+ $regions` || exit $?;;
*)
region=$regions
esac
@@ -495,23 +529,24 @@ Universal Time is now: $UTdate."
# Output TZ info and ask the user to confirm.
+ infomsg='
+The following information has been given:
+
+'
- echo >&2 ""
- echo >&2 "The following information has been given:"
- echo >&2 ""
case $country%$region%$coord in
- ?*%?*%) echo >&2 " $country$newline $region";;
- ?*%%) echo >&2 " $country";;
- %?*%?*) echo >&2 " coord $coord$newline $region";;
- %%?*) echo >&2 " coord $coord";;
- *) echo >&2 " TZ='$TZ'"
+ ?*%?*%) infomsg="${infomsg} $country$newline $region";;
+ ?*%%) infomsg="${infomsg} $country";;
+ %?*%?*) infomsg="${infomsg} coord $coord$newline $region";;
+ %%?*) infomsg="${infomsg} coord $coord";;
+ *) infomsg="${infomsg} TZ='$TZ'"
esac
- echo >&2 ""
- echo >&2 "Therefore TZ='$TZ' will be used.$extra_info"
- echo >&2 "Is the above information OK?"
+ infomsg="${infomsg}
+
+Therefore TZ='$TZ' will be used.$extra_info
+Is the above information OK?"
- doselect Yes No
- ok=$select_result
+ ok=`"${SHOWDIALOG}" yesno "${infomsg}" Yes No` || exit $?
case $ok in
Yes) break
esac
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