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#==============================================================================
# Contains Wcb procedures for text and ctext widgets.
#
# REMARK: Everything stated below for text widgets is valid for ctext widgets,
# too.
#
# Copyright (c) 1999-2010 Csaba Nemethi (E-mail: csaba.nemethi@t-online.de)
#==============================================================================
#
# Namespace initialization
# ========================
#
namespace eval wcb {
#
# Some regexp patterns:
#
if {$tk_version >= 8.1} {
variable alphaOrNlPat {^[[:alpha:]\n]*$}
variable digitOrNlPat {^[[:digit:]\n]*$}
variable alnumOrNlPat {^[[:alnum:]\n]*$}
} else {
# Ugly because of the \n:
variable alphaOrNlPat "^\[A-Za-z\n]*$"
variable digitOrNlPat "^\[0-9\n]*$"
variable alnumOrNlPat "^\[A-Za-z0-9\n]*$"
}
}
#
# Simple before-insert callback routines for text widgets
# =======================================================
#
#------------------------------------------------------------------------------
# wcb::checkStrsForRegExp
#
# Checks whether the strings to be inserted into the text widget w, contained
# in the list args of the form "string ?tagList string tagList ...?", are
# matched by the regular expression exp; if not, it cancels the insert
# operation.
#------------------------------------------------------------------------------
proc wcb::checkStrsForRegExp {exp w idx args} {
foreach {str tagList} $args {
if {![regexp -- $exp $str]} {
cancel
return ""
}
}
}
#------------------------------------------------------------------------------
# wcb::checkStrsForAlpha
#
# Checks whether the strings to be inserted into the text widget w, contained
# in the list args of the form "string ?tagList string tagList ...?", are
# alphabetic; if not, it cancels the insert operation.
#------------------------------------------------------------------------------
proc wcb::checkStrsForAlpha {w idx args} {
variable alphaOrNlPat
checkStrsForRegExp $alphaOrNlPat $w $idx $args
}
#------------------------------------------------------------------------------
# wcb::checkStrsForNum
#
# Checks whether the strings to be inserted into the text widget w, contained
# in the list args of the form "string ?tagList string tagList ...?", are
# numeric; if not, it cancels the insert operation.
#------------------------------------------------------------------------------
proc wcb::checkStrsForNum {w idx args} {
variable digitOrNlPat
checkStrsForRegExp $digitOrNlPat $w $idx $args
}
#------------------------------------------------------------------------------
# wcb::checkStrsForAlnum
#
# Checks whether the strings to be inserted into the text widget w, contained
# in the list args of the form "string ?tagList string tagList ...?", are
# alphanumeric; if not, it cancels the insert operation.
#------------------------------------------------------------------------------
proc wcb::checkStrsForAlnum {w idx args} {
variable alnumOrNlPat
checkStrsForRegExp $alnumOrNlPat $w $idx $args
}
#------------------------------------------------------------------------------
# wcb::convStrsToUpper
#
# Replaces the strings to be inserted into the text widget w, contained in the
# list args of the form "string ?tagList string tagList ...?", with their
# uppercase equivalents.
#------------------------------------------------------------------------------
proc wcb::convStrsToUpper {w idx args} {
set n 1
foreach {str tagList} $args {
replace $n $n [string toupper $str]
incr n 2
}
}
#------------------------------------------------------------------------------
# wcb::convStrsToLower
#
# Replaces the strings to be inserted into the text widget w, contained in the
# list args of the form "string ?tagList string tagList ...?", with their
# lowercase equivalents.
#------------------------------------------------------------------------------
proc wcb::convStrsToLower {w idx args} {
set n 1
foreach {str tagList} $args {
replace $n $n [string tolower $str]
incr n 2
}
}
#
# Private procedure
# =================
#
#------------------------------------------------------------------------------
# wcb::textWidgetCmd
#
# Processes the Tcl command corresponding to a text widget w with registered
# callbacks. In this procedure, the execution of the commands insert, delete,
# and mark set insert is preceded by calls to the corresponding before-
# callbacks and followed by calls to the corresponding after-callbacks, in the
# global scope.
#------------------------------------------------------------------------------
proc wcb::textWidgetCmd {w argList} {
set orig [list ::_$w]
set argCount [llength $argList]
if {$argCount == 0} {
# Let Tk report the error
return [uplevel 2 $orig $argList]
}
set option [lindex $argList 0]
set opLen [string length $option]
set opArgs [lrange $argList 1 end]
if {[string first $option "insert"] == 0 && $opLen >= 3} {
if {$argCount >= 2} {
return [wcb::processCmd $w insert insert $opArgs]
} else {
# Let Tk report the error
return [uplevel 2 $orig $argList]
}
} elseif {[string first $option "delete"] == 0 && $opLen >= 3} {
if {$argCount == 2 || $argCount == 3} {
return [wcb::processCmd $w delete delete $opArgs]
} else {
# Let Tk report the error
return [uplevel 2 $orig $argList]
}
} elseif {[string first $option "replace"] == 0} {
if {$argCount >= 4} {
return [wcb::processCmd $w replace replace $opArgs]
} else {
# Let Tk report the error
return [uplevel 2 $orig $argList]
}
} elseif {[string first $option "mark"] == 0} {
set markOption [lindex $opArgs 0]
if {[string first $markOption "set"] == 0} {
if {$argCount == 4 &&
[string compare [lindex $opArgs 1] "insert"] == 0} {
set markOpArgs [lrange $opArgs 2 end]
return [wcb::processCmd $w motion "mark set insert" \
$markOpArgs]
} else {
return [uplevel 2 $orig $argList]
}
} else {
return [uplevel 2 $orig $argList]
}
} elseif {[string first $option "tag"] == 0} {
set tagOption [lindex $opArgs 0]
if {[string first $tagOption "add"] == 0} {
if {$argCount >= 4 &&
[string compare [lindex $opArgs 1] "sel"] == 0} {
set selOpArgs [lrange $opArgs 2 end]
return [wcb::processCmd $w selset "tag add sel" \
$selOpArgs]
} else {
return [uplevel 2 $orig $argList]
}
} elseif {[string first $tagOption "remove"] == 0} {
if {$argCount >= 4 &&
[string compare [lindex $opArgs 1] "sel"] == 0} {
set selOpArgs [lrange $opArgs 2 end]
return [wcb::processCmd $w selclear "tag remove sel" \
$selOpArgs]
} else {
return [uplevel 2 $orig $argList]
}
} else {
return [uplevel 2 $orig $argList]
}
} else {
return [uplevel 2 $orig $argList]
}
}
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