diff options
Diffstat (limited to 'library/msgcat/msgcat.tcl')
| -rwxr-xr-x[-rw-r--r--] | library/msgcat/msgcat.tcl | 709 |
1 files changed, 646 insertions, 63 deletions
diff --git a/library/msgcat/msgcat.tcl b/library/msgcat/msgcat.tcl index cf3b9d7..b217634 100644..100755 --- a/library/msgcat/msgcat.tcl +++ b/library/msgcat/msgcat.tcl @@ -13,23 +13,30 @@ package require Tcl 8.5 # When the version number changes, be sure to update the pkgIndex.tcl file, # and the installation directory in the Makefiles. -package provide msgcat 1.5.2 +package provide msgcat 1.6.0 namespace eval msgcat { - namespace export mc mcload mclocale mcmax mcmset mcpreferences mcset \ - mcunknown mcflset mcflmset - - # Records the current locale as passed to mclocale - variable Locale "" + namespace export mc mcexists mcload mclocale mcmax mcmset mcpreferences mcset\ + mcunknown mcflset mcflmset mcloadedlocales mcforgetpackage\ + mcpackageconfig mcpackagelocale # Records the list of locales to search variable Loclist {} + # List of currently loaded locales + variable LoadedLocales {} + # Records the locale of the currently sourced message catalogue file variable FileLocale + # Configuration values per Package (e.g. client namespace). + # The dict key is of the form "<option> <namespace>" and the value is the + # configuration option. A nonexisting key is an unset option. + variable PackageConfig [dict create mcfolder {} loadcmd {} changecmd {}\ + unknowncmd {} loadedlocales {} loclist {}] + # Records the mapping between source strings and translated strings. The - # dict key is of the form "<locale> <namespace> <src>", where locale and + # dict key is of the form "<namespace> <locale> <src>", where locale and # namespace should be themselves dict values and the value is # the translated string. variable Msgs [dict create] @@ -173,6 +180,8 @@ namespace eval msgcat { # parent namespace until the source is found. If additional args are # specified, use the format command to work them into the traslated # string. +# If no catalog item is found, mcunknown is called in the caller frame +# and its result is returned. # # Arguments: # src The string to translate. @@ -183,30 +192,86 @@ namespace eval msgcat { # format command. proc msgcat::mc {src args} { + # this may be replaced by: + # return [mcget -namespace [uplevel 1 [list ::namespace current]] --\ + # $src {*}$args] + # Check for the src in each namespace starting from the local and # ending in the global. variable Msgs variable Loclist - variable Locale set ns [uplevel 1 [list ::namespace current]] + set loclist [PackagePreferences $ns] - while {$ns != ""} { - foreach loc $Loclist { - if {[dict exists $Msgs $loc $ns $src]} { - if {[llength $args] == 0} { - return [dict get $Msgs $loc $ns $src] - } else { - return [format [dict get $Msgs $loc $ns $src] {*}$args] - } + set nscur $ns + while {$nscur != ""} { + foreach loc $loclist { + if {[dict exists $Msgs $nscur $loc $src]} { + return [DefaultUnknown "" [dict get $Msgs $nscur $loc $src]\ + {*}$args] + } + } + set nscur [namespace parent $nscur] + } + # call package local or default unknown command + set args [linsert $args 0 [lindex $loclist 0] $src] + switch -exact -- [Invoke unknowncmd $args $ns result] { + 0 { return [uplevel 1 [linsert $args 0 [namespace origin mcunknown]]] } + 1 { return [DefaultUnknown {*}$args] } + default { return $result } + } +} + +# msgcat::mcexists -- +# +# Check if a catalog item is set or if mc would invoke mcunknown. +# +# Arguments: +# -exactnamespace Only check the exact namespace and no +# parent namespaces +# -exactlocale Only check the exact locale and not all members +# of the preferences list +# src Message catalog key +# +# Results: +# true if an adequate catalog key was found + +proc msgcat::mcexists {args} { + + variable Msgs + variable Loclist + variable PackageConfig + + set ns [uplevel 1 [list ::namespace current]] + set loclist [PackagePreferences $ns] + + while {[llength $args] > 1} { + set args [lassign $args option] + switch -glob -- $option { + -exactnamespace { set exactnamespace 1 } + -exactlocale { set loclist [lrange $loclist 0 0] } + -* { return -code error "unknown option \"$option\"" } + default { + return -code error "wrong # args: should be\ + \"[lindex [info level 0] 0] ?-exactnamespace?\ + ?-exactlocale? src\"" } } + } + set src [lindex $args 0] + + while {$ns ne ""} { + foreach loc $loclist { + if {[dict exists $Msgs $ns $loc $src]} { + return 1 + } + } + if {[info exists exactnamespace]} {return 0} set ns [namespace parent $ns] } - # we have not found the translation - return [uplevel 1 [list [namespace origin mcunknown] \ - $Locale $src {*}$args]] + return 0 } # msgcat::mclocale -- @@ -219,11 +284,11 @@ proc msgcat::mc {src args} { # separated by underscores (e.g. en_US). # # Results: -# Returns the current locale. +# Returns the normalized set locale. proc msgcat::mclocale {args} { variable Loclist - variable Locale + variable LoadedLocales set len [llength $args] if {$len > 1} { @@ -232,24 +297,49 @@ proc msgcat::mclocale {args} { } if {$len == 1} { - set newLocale [lindex $args 0] + set newLocale [string tolower [lindex $args 0]] if {$newLocale ne [file tail $newLocale]} { return -code error "invalid newLocale value \"$newLocale\":\ could be path to unsafe code." } - set Locale [string tolower $newLocale] - set Loclist {} - set word "" - foreach part [split $Locale _] { - set word [string trim "${word}_${part}" _] - if {$word ne [lindex $Loclist 0]} { - set Loclist [linsert $Loclist 0 $word] - } + if {[lindex $Loclist 0] ne $newLocale} { + set Loclist [GetPreferences $newLocale] + + # locale not loaded jet + LoadAll $Loclist + # Invoke callback + Invoke changecmd $Loclist + } + } + return [lindex $Loclist 0] +} + +# msgcat::GetPreferences -- +# +# Get list of locales from a locale. +# The first element is always the lowercase locale. +# Other elements have one component separated by "_" less. +# Multiple "_" are seen as one separator: de__ch_spec de__ch de {} +# +# Arguments: +# Locale. +# +# Results: +# Locale list + +proc msgcat::GetPreferences {locale} { + set locale [string tolower $locale] + set loclist [list $locale] + while {-1 !=[set pos [string last "_" $locale]]} { + set locale [string range $locale 0 $pos-1] + if { "_" ne [string index $locale end] } { + lappend loclist $locale } - lappend Loclist {} - set Locale [lindex $Loclist 0] } - return $Locale + if {"" ne [lindex $loclist end]} { + lappend loclist {} + } + return $loclist } # msgcat::mcpreferences -- @@ -268,6 +358,381 @@ proc msgcat::mcpreferences {} { return $Loclist } +# msgcat::mcloadedlocales -- +# +# Get or change the list of currently loaded default locales +# +# The following subcommands are available: +# loaded +# Get the current list of loaded locales +# clear +# Remove all loaded locales not present in mcpreferences. +# +# Arguments: +# subcommand One of loaded or clear +# +# Results: +# Empty string, if not stated differently for the subcommand + +proc msgcat::mcloadedlocales {subcommand} { + variable Loclist + variable LoadedLocales + variable Msgs + variable PackageConfig + switch -exact -- $subcommand { + clear { + # Remove all locales not contained in Loclist + # skip any packages with package locale + set LoadedLocales $Loclist + foreach ns [dict keys $Msgs] { + if {![dict exists $PackageConfig loclist $ns]} { + foreach locale [dict keys [dict get $Msgs $ns]] { + if {$locale ni $Loclist} { + dict unset Msgs $ns $locale + } + } + } + } + } + loaded { return $LoadedLocales } + default { + return -code error "unknown subcommand \"$subcommand\": must be\ + clear, or loaded" + } + } + return +} + +# msgcat::mcpackagelocale -- +# +# Get or change the package locale of the calling package. +# +# The following subcommands are available: +# set +# Set a package locale. +# This may load message catalog files and may clear message catalog +# items, if the former locale was the default locale. +# Returns the normalized set locale. +# The default locale is taken, if locale is not given. +# get +# Get the locale valid for this package. +# isset +# Returns true, if a package locale is set +# unset +# Unset the package locale and activate the default locale. +# This loads message catalog file which where missing in the package +# locale. +# preferences +# Return locale preference list valid for the package. +# loaded +# Return loaded locale list valid for the current package. +# clear +# If the current package has a package locale, remove all package +# locales not containes in package mcpreferences. +# It is an error to call this without a package locale set. +# +# The subcommands get, preferences and loaded return the corresponding +# default data, if no package locale is set. +# +# Arguments: +# subcommand One of get, init, present, add or remove +# locale package locale (only set subcommand) +# +# Results: +# Empty string, if not stated differently for the subcommand + +proc msgcat::mcpackagelocale {subcommand {locale ""}} { + # todo: implement using an ensemble + variable Loclist + variable LoadedLocales + variable Msgs + variable PackageConfig + # Check option + # check if required item is exactly provided + if {[llength [info level 0]] == 2} { + # locale not given + unset locale + } else { + # locale given + if {$subcommand in + {"get" "isset" "unset" "preferences" "loaded" "clear"} } { + return -code error "wrong # args: should be\ + \"[lrange [info level 0] 0 1]\"" + } + set locale [string tolower $locale] + } + set ns [uplevel 1 {::namespace current}] + + switch -exact -- $subcommand { + get { return [lindex [PackagePreferences $ns] 0] } + preferences { return [PackagePreferences $ns] } + loaded { return [PackageLocales $ns] } + isset { return [dict exists $PackageConfig loclist $ns] } + set { # set a package locale or add a package locale + + # Copy the default locale if no package locale set so far + if {![dict exists $PackageConfig loclist $ns]} { + dict set PackageConfig loclist $ns $Loclist + dict set PackageConfig loadedlocales $ns $LoadedLocales + } + + # Check if changed + set loclist [dict get $PackageConfig loclist $ns] + if {! [info exists locale] || $locale eq [lindex $loclist 0] } { + return [lindex $loclist 0] + } + + # Change loclist + set loclist [GetPreferences $locale] + set locale [lindex $loclist 0] + dict set PackageConfig loclist $ns $loclist + + # load eventual missing locales + set loadedLocales [dict get $PackageConfig loadedlocales $ns] + if {$locale in $loadedLocales} { return $locale } + set loadLocales [ListComplement $loadedLocales $loclist] + dict set PackageConfig loadedlocales $ns\ + [concat $loadedLocales $loadLocales] + Load $ns $loadLocales + return $locale + } + clear { # Remove all locales not contained in Loclist + if {![dict exists $PackageConfig loclist $ns]} { + return -code error "clear only when package locale set" + } + set loclist [dict get $PackageConfig loclist $ns] + dict set PackageConfig loadedlocales $ns $loclist + if {[dict exists $Msgs $ns]} { + foreach locale [dict keys [dict get $Msgs $ns]] { + if {$locale ni $loclist} { + dict unset Msgs $ns $locale + } + } + } + } + unset { # unset package locale and restore default locales + + if { ![dict exists $PackageConfig loclist $ns] } { return } + + # unset package locale + set loadLocales [ListComplement\ + [dict get $PackageConfig loadedlocales $ns] $LoadedLocales] + dict unset PackageConfig loadedlocales $ns + dict unset PackageConfig loclist $ns + + # Add missing locales + Load $ns $loadLocales + } + default { + return -code error "unknown subcommand \"$subcommand\": must be\ + clear, get, isset, loaded, present, set, or unset" + } + } + return +} + +# msgcat::mcforgetpackage -- +# +# Remove any data of the calling package from msgcat +# + +proc msgcat::mcforgetpackage {} { + # todo: this may be implemented using an ensemble + variable PackageConfig + variable Msgs + set ns [uplevel 1 {::namespace current}] + # Remove MC items + dict unset Msgs $ns + # Remove config items + foreach key [dict keys $PackageConfig] { + dict unset PackageConfig $key $ns + } + return +} + +# msgcat::mcpackageconfig -- +# +# Get or modify the per caller namespace (e.g. packages) config options. +# +# Available subcommands are: +# +# get get the current value or an error if not set. +# isset return true, if the option is set +# set set the value (see also distinct option). +# Returns the number of loaded message files. +# unset Clear option. return "". +# +# Available options are: +# +# mcfolder +# The message catalog folder of the package. +# This is automatically set by mcload. +# If the value is changed using the set subcommand, an evntual +# loadcmd is invoked and all message files of the package locale are +# loaded. +# +# loadcmd +# The command gets executed before a message file would be +# sourced for this module. +# The command is invoked with the expanded locale list to load. +# The command is not invoked if the registering package namespace +# is not present. +# This callback might also be used as an alternative to message +# files. +# If the value is changed using the set subcommand, the callback is +# directly invoked with the current file locale list. No file load is +# executed. +# +# changecmd +# The command is invoked, after an executed locale change. +# Appended argument is expanded mcpreferences. +# +# unknowncmd +# Use a package locale mcunknown procedure instead the global one. +# The appended arguments are identical to mcunknown. +# A default unknown handler is used if set to the empty string. +# This consists in returning the key if no arguments are given. +# With given arguments, format is used to process the arguments. +# +# Arguments: +# subcommand Operation on the package +# option The package option to get or set. +# ?value? Eventual value for the subcommand +# +# Results: +# Depends on the subcommand and option and is described there + +proc msgcat::mcpackageconfig {subcommand option {value ""}} { + variable PackageConfig + # get namespace + set ns [uplevel 1 {::namespace current}] + + if {$option ni {"mcfolder" "loadcmd" "changecmd" "unknowncmd"}} { + return -code error "bad option \"$option\": must be mcfolder, loadcmd,\ + changecmd, or unknowncmd" + } + + # check if value argument is exactly provided + if {[llength [info level 0]] == 4 } { + # value provided + if {$subcommand in {"get" "isset" "unset"}} { + return -code error "wrong # args: should be\ + \"[lrange [info level 0] 0 2] value\"" + } + } elseif {$subcommand eq "set"} { + return -code error\ + "wrong # args: should be \"[lrange [info level 0] 0 2]\"" + } + + # Execute subcommands + switch -exact -- $subcommand { + get { # Operation get return current value + if {![dict exists $PackageConfig $option $ns]} { + return -code error "package option \"$option\" not set" + } + return [dict get $PackageConfig $option $ns] + } + isset { return [dict exists $PackageConfig $option $ns] } + unset { dict unset PackageConfig $option $ns } + set { # Set option + + if {$option eq "mcfolder"} { + set value [file normalize $value] + } + # Check if changed + if { [dict exists $PackageConfig $option $ns] + && $value eq [dict get $PackageConfig $option $ns] } { + return 0 + } + + # set new value + dict set PackageConfig $option $ns $value + + # Reload pending message catalogs + switch -exact -- $option { + mcfolder { return [Load $ns [PackageLocales $ns]] } + loadcmd { return [Load $ns [PackageLocales $ns] 1] } + } + return 0 + } + default { + return -code error "unknown subcommand \"$subcommand\":\ + must be get, isset, unset, or set" + } + } + return +} + +# msgcat::PackagePreferences -- +# +# Return eventual present package preferences or the default list if not +# present. +# +# Arguments: +# ns Package namespace +# +# Results: +# locale list + +proc msgcat::PackagePreferences {ns} { + variable PackageConfig + if {[dict exists $PackageConfig loclist $ns]} { + return [dict get $PackageConfig loclist $ns] + } + variable Loclist + return $Loclist +} + +# msgcat::PackageLocales -- +# +# Return eventual present package locales or the default list if not +# present. +# +# Arguments: +# ns Package namespace +# +# Results: +# locale list + +proc msgcat::PackageLocales {ns} { + variable PackageConfig + if {[dict exists $PackageConfig loadedlocales $ns]} { + return [dict get $PackageConfig loadedlocales $ns] + } + variable LoadedLocales + return $LoadedLocales +} + +# msgcat::ListComplement -- +# +# Build the complement of two lists. +# Return a list with all elements in list2 but not in list1. +# Optionally return the intersection. +# +# Arguments: +# list1 excluded list +# list2 included list +# inlistname If not "", write in this variable the intersection list +# +# Results: +# list with all elements in list2 but not in list1 + +proc msgcat::ListComplement {list1 list2 {inlistname ""}} { + if {"" ne $inlistname} { + upvar 1 $inlistname inlist + } + set inlist {} + set outlist {} + foreach item $list2 { + if {$item in $list1} { + lappend inlist $item + } else { + lappend outlist $item + } + } + return $outlist +} + # msgcat::mcload -- # # Attempt to load message catalogs for each locale in the @@ -280,24 +745,88 @@ proc msgcat::mcpreferences {} { # Returns the number of message catalogs that were loaded. proc msgcat::mcload {langdir} { + return [uplevel 1 [list\ + [namespace origin mcpackageconfig] set mcfolder $langdir]] +} + +# msgcat::LoadAll -- +# +# Load a list of locales for all packages not having a package locale +# list. +# +# Arguments: +# langdir The directory to search. +# +# Results: +# Returns the number of message catalogs that were loaded. + +proc msgcat::LoadAll {locales} { + variable PackageConfig + variable LoadedLocales + if {0 == [llength $locales]} { return {} } + # filter jet unloaded locales + set locales [ListComplement $LoadedLocales $locales] + if {0 == [llength $locales]} { return {} } + lappend LoadedLocales {*}$locales + + set packages [lsort -unique [concat\ + [dict keys [dict get $PackageConfig loadcmd]]\ + [dict keys [dict get $PackageConfig mcfolder]]]] + foreach ns $packages { + if {! [dict exists $PackageConfig loclist $ns] } { + Load $ns $locales + } + } + return $locales +} + +# msgcat::Load -- +# +# Invoke message load callback and load message catalog files. +# +# Arguments: +# ns Namespace (equal package) to load the message catalog. +# locales List of locales to load. +# callbackonly true if only callback should be invoked +# +# Results: +# Returns the number of message catalogs that were loaded. + +proc msgcat::Load {ns locales {callbackonly 0}} { variable FileLocale + variable PackageConfig + variable LoadedLocals + + if {0 == [llength $locales]} { return 0 } + + # Invoke callback + Invoke loadcmd $locales $ns + + if {$callbackonly || ![dict exists $PackageConfig mcfolder $ns]} { + return 0 + } + + # Invoke file load + set langdir [dict get $PackageConfig mcfolder $ns] + # Save the file locale if we are recursively called if {[info exists FileLocale]} { set nestedFileLocale $FileLocale } set x 0 - foreach p [mcpreferences] { + foreach p $locales { if {$p eq {}} { set p ROOT } set langfile [file join $langdir $p.msg] if {[file exists $langfile]} { incr x - set FileLocale [string tolower [file tail [file rootname $langfile]]] + set FileLocale [string tolower\ + [file tail [file rootname $langfile]]] if {"root" eq $FileLocale} { set FileLocale "" } - uplevel 1 [list ::source -encoding utf-8 $langfile] + namespace inscope $ns [list ::source -encoding utf-8 $langfile] unset FileLocale } } @@ -307,6 +836,52 @@ proc msgcat::mcload {langdir} { return $x } +# msgcat::Invoke -- +# +# Invoke a set of registered callbacks. +# The callback is only invoked, if its registered namespace exists. +# +# Arguments: +# index Index into PackageConfig to get callback command +# arglist parameters to the callback invocation +# ns (Optional) package to call. +# If not given or empty, check all registered packages. +# resultname Variable to save the callback result of the last called +# callback to. May be set to "" to discard the result. +# +# Results: +# Possible values: +# - 0: no valid command registered +# - 1: registered command was the empty string +# - 2: registered command called, resultname is set +# If multiple commands are called, the maximum of all results is returned. + +proc msgcat::Invoke {index arglist {ns ""} {resultname ""}} { + variable PackageConfig + variable Config + if {"" ne $resultname} { + upvar 1 $resultname result + } + if {"" eq $ns} { + set packageList [dict keys [dict get $PackageConfig $index]] + } else { + set packageList [list $ns] + } + set ret 0 + foreach ns $packageList { + if {[dict exists $PackageConfig $index $ns] && [namespace exists $ns]} { + set cmd [dict get $PackageConfig $index $ns] + if {"" eq $cmd} { + if {$ret == 0} {set ret 1} + } else { + set result [namespace inscope $ns $cmd {*}$arglist] + set ret 2 + } + } + } + return $ret +} + # msgcat::mcset -- # # Set the translation for a given string in a specified locale. @@ -330,7 +905,7 @@ proc msgcat::mcset {locale src {dest ""}} { set locale [string tolower $locale] - dict set Msgs $locale $ns $src $dest + dict set Msgs $ns $locale $src $dest return $dest } @@ -351,16 +926,10 @@ proc msgcat::mcflset {src {dest ""}} { variable Msgs if {![info exists FileLocale]} { - return -code error \ - "must only be used inside a message catalog loaded with ::msgcat::mcload" - } - if {[llength [info level 0]] == 2} { ;# dest not specified - set dest $src + return -code error "must only be used inside a message catalog loaded\ + with ::msgcat::mcload" } - - set ns [uplevel 1 [list ::namespace current]] - dict set Msgs $FileLocale $ns $src $dest - return $dest + return [uplevel 1 [list [namespace origin mcset] $FileLocale $src $dest]] } # msgcat::mcmset -- @@ -380,14 +949,14 @@ proc msgcat::mcmset {locale pairs} { set length [llength $pairs] if {$length % 2} { return -code error "bad translation list:\ - should be \"[lindex [info level 0] 0] locale {src dest ...}\"" + should be \"[lindex [info level 0] 0] locale {src dest ...}\"" } set locale [string tolower $locale] set ns [uplevel 1 [list ::namespace current]] foreach {src dest} $pairs { - dict set Msgs $locale $ns $src $dest + dict set Msgs $ns $locale $src $dest } return [expr {$length / 2}] @@ -408,26 +977,17 @@ proc msgcat::mcflmset {pairs} { variable Msgs if {![info exists FileLocale]} { - return -code error \ - "must only be used inside a message catalog loaded with ::msgcat::mcload" - } - set length [llength $pairs] - if {$length % 2} { - return -code error "bad translation list:\ - should be \"[lindex [info level 0] 0] locale {src dest ...}\"" + return -code error "must only be used inside a message catalog loaded\ + with ::msgcat::mcload" } - - set ns [uplevel 1 [list ::namespace current]] - foreach {src dest} $pairs { - dict set Msgs $FileLocale $ns $src $dest - } - return [expr {$length / 2}] + return [uplevel 1 [list [namespace origin mcmset] $FileLocale $pairs]] } # msgcat::mcunknown -- # # This routine is called by msgcat::mc if a translation cannot -# be found for a string. This routine is intended to be replaced +# be found for a string and no unknowncmd is set for the current +# package. This routine is intended to be replaced # by an application specific routine for error reporting # purposes. The default behavior is to return the source string. # If additional args are specified, the format command will be used @@ -441,7 +1001,30 @@ proc msgcat::mcflmset {pairs} { # Results: # Returns the translated value. -proc msgcat::mcunknown {locale src args} { +proc msgcat::mcunknown {args} { + return [uplevel 1 [list [namespace origin DefaultUnknown] {*}$args]] +} + +# msgcat::DefaultUnknown -- +# +# This routine is called by msgcat::mc if a translation cannot +# be found for a string in the following circumstances: +# - Default global handler, if mcunknown is not redefined. +# - Per package handler, if the package sets unknowncmd to the empty +# string. +# It returna the source string if the argument list is empty. +# If additional args are specified, the format command will be used +# to work them into the traslated string. +# +# Arguments: +# locale (unused) The current locale. +# src The string to be translated. +# args Args to pass to the format command +# +# Results: +# Returns the translated value. + +proc msgcat::DefaultUnknown {locale src args} { if {[llength $args]} { return [format $src {*}$args] } else { |