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#
# Finddialog
# ----------------------------------------------------------------------
# This class implements a dialog for searching text. It prompts the
# user for a search string and the method of searching which includes
# case sensitive, regular expressions, backwards, and all.
#
# ----------------------------------------------------------------------
# AUTHOR: Mark L. Ulferts EMAIL: mulferts@austin.dsccc.com
#
# @(#) RCS: $Id: finddialog.itk,v 1.3 2001/08/07 19:56:48 smithc Exp $
# ----------------------------------------------------------------------
# Copyright (c) 1996 DSC Technologies Corporation
# ======================================================================
# Permission to use, copy, modify, distribute and license this software
# and its documentation for any purpose, and without fee or written
# agreement with DSC, is hereby granted, provided that the above copyright
# notice appears in all copies and that both the copyright notice and
# warranty disclaimer below appear in supporting documentation, and that
# the names of DSC Technologies Corporation or DSC Communications
# Corporation not be used in advertising or publicity pertaining to the
# software without specific, written prior permission.
#
# DSC DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
# ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, AND NON-
# INFRINGEMENT. THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, AND THE
# AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE MAINTENANCE,
# SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. IN NO EVENT SHALL
# DSC BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
# ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
# WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTUOUS ACTION,
# ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
# SOFTWARE.
# ======================================================================
#
# Usual options.
#
itk::usual Finddialog {
keep -background -cursor -foreground -selectcolor
}
# ------------------------------------------------------------------
# IPRFINDDIALOG
# ------------------------------------------------------------------
itcl::class ::iwidgets::Finddialog {
inherit iwidgets::Dialogshell
constructor {args} {}
itk_option define -selectcolor selectColor Background {}
itk_option define -clearcommand clearCommand Command {}
itk_option define -matchcommand matchCommand Command {}
itk_option define -patternbackground patternBackground Background \#707070
itk_option define -patternforeground patternForeground Foreground White
itk_option define -searchbackground searchBackground Background \#c4c4c4
itk_option define -searchforeground searchForeground Foreground Black
itk_option define -textwidget textWidget TextWidget {}
public {
method clear {}
method find {}
}
protected {
method _get {setting}
method _textExists {}
common _optionValues ;# Current settings of check buttons.
common _searchPoint ;# Starting location for searches
common _matchLen ;# Matching pattern string length
}
}
#
# Provide a lowercased access method for the ::finddialog class.
#
proc ::iwidgets::finddialog {pathName args} {
uplevel ::iwidgets::Finddialog $pathName $args
}
#
# Use option database to override default resources of base classes.
#
option add *Finddialog.title "Find" widgetDefault
# ------------------------------------------------------------------
# CONSTRUCTOR
# ------------------------------------------------------------------
itcl::body ::iwidgets::Finddialog::constructor {args} {
#
# Add the find pattern entryfield.
#
itk_component add pattern {
iwidgets::Entryfield $itk_interior.pattern -labeltext "Find:"
}
bind [$itk_component(pattern) component entry] \
<Return> "[itcl::code $this invoke]; break"
#
# Add the find all checkbutton.
#
itk_component add all {
checkbutton $itk_interior.all \
-variable [itcl::scope _optionValues($this-all)] \
-text "All"
}
#
# Add the case consideration checkbutton.
#
itk_component add case {
checkbutton $itk_interior.case \
-variable [itcl::scope _optionValues($this-case)] \
-text "Consider Case"
}
#
# Add the regular expression checkbutton.
#
itk_component add regexp {
checkbutton $itk_interior.regexp \
-variable [itcl::scope _optionValues($this-regexp)] \
-text "Use Regular Expression"
}
#
# Add the find backwards checkbutton.
#
itk_component add backwards {
checkbutton $itk_interior.backwards \
-variable [itcl::scope _optionValues($this-backwards)] \
-text "Find Backwards"
}
#
# Add the find, clear, and close buttons, making find be the default.
#
add Find -text Find -command [itcl::code $this find]
add Clear -text Clear -command [itcl::code $this clear]
add Close -text Close -command [itcl::code $this deactivate 0]
default Find
#
# Use the grid to layout the components.
#
grid $itk_component(pattern) -row 0 -column 0 \
-padx 10 -pady 10 -columnspan 4 -sticky ew
grid $itk_component(all) -row 1 -column 0
grid $itk_component(case) -row 1 -column 1
grid $itk_component(regexp) -row 1 -column 2
grid $itk_component(backwards) -row 1 -column 3
grid columnconfigure $itk_interior 0 -weight 1
grid columnconfigure $itk_interior 1 -weight 1
grid columnconfigure $itk_interior 2 -weight 1
grid columnconfigure $itk_interior 3 -weight 1
#
# Initialize all the configuration options.
#
eval itk_initialize $args
}
# ------------------------------------------------------------------
# OPTIONS
# ------------------------------------------------------------------
# ------------------------------------------------------------------
# OPTION: -clearcommand
#
# Specifies a command to be invoked following a clear operation.
# The command is meant to be a means of notification that the
# clear has taken place and allow other actions to take place such
# as disabling a find again menu.
# ------------------------------------------------------------------
itcl::configbody iwidgets::Finddialog::clearcommand {}
# ------------------------------------------------------------------
# OPTION: -matchcommand
#
# Specifies a command to be invoked following a find operation.
# The command is called with a match point as an argument. Should
# a match not be found the match point is {}.
# ------------------------------------------------------------------
itcl::configbody iwidgets::Finddialog::matchcommand {}
# ------------------------------------------------------------------
# OPTION: -patternbackground
#
# Specifies the background color of the text matching the search
# pattern. It may have any of the forms accepted by Tk_GetColor.
# ------------------------------------------------------------------
itcl::configbody iwidgets::Finddialog::patternbackground {}
# ------------------------------------------------------------------
# OPTION: -patternforeground
#
# Specifies the foreground color of the pattern matching a search
# operation. It may have any of the forms accepted by Tk_GetColor.
# ------------------------------------------------------------------
itcl::configbody iwidgets::Finddialog::patternforeground {}
# ------------------------------------------------------------------
# OPTION: -searchforeground
#
# Specifies the foreground color of the line containing the matching
# pattern from a search operation. It may have any of the forms
# accepted by Tk_GetColor.
# ------------------------------------------------------------------
itcl::configbody iwidgets::Finddialog::searchforeground {}
# ------------------------------------------------------------------
# OPTION: -searchbackground
#
# Specifies the background color of the line containing the matching
# pattern from a search operation. It may have any of the forms
# accepted by Tk_GetColor.
# ------------------------------------------------------------------
itcl::configbody iwidgets::Finddialog::searchbackground {}
# ------------------------------------------------------------------
# OPTION: -textwidget
#
# Specifies the scrolledtext or text widget to be searched.
# ------------------------------------------------------------------
itcl::configbody iwidgets::Finddialog::textwidget {
if {$itk_option(-textwidget) != {}} {
set _searchPoint($itk_option(-textwidget)) 1.0
}
}
# ------------------------------------------------------------------
# METHODS
# ------------------------------------------------------------------
# ------------------------------------------------------------------
# PUBLIC METHOD: clear
#
# Clear the pattern entryfield and the indicators.
# ------------------------------------------------------------------
itcl::body ::iwidgets::Finddialog::clear {} {
$itk_component(pattern) clear
if {[_textExists]} {
set _searchPoint($itk_option(-textwidget)) 1.0
$itk_option(-textwidget) tag remove search-line 1.0 end
$itk_option(-textwidget) tag remove search-pattern 1.0 end
}
if {$itk_option(-clearcommand) != {}} {
eval $itk_option(-clearcommand)
}
}
# ------------------------------------------------------------------
# PUBLIC METHOD: find
#
# Search for a specific text string in the text widget given by
# the -textwidget option. Should this option not be set to an
# existing widget, then a quick exit is made.
# ------------------------------------------------------------------
itcl::body ::iwidgets::Finddialog::find {} {
if {! [_textExists]} {
return
}
#
# Clear any existing indicators in the text widget.
#
$itk_option(-textwidget) tag remove search-line 1.0 end
$itk_option(-textwidget) tag remove search-pattern 1.0 end
#
# Make sure the search pattern isn't just blank. If so, skip this.
#
set pattern [_get pattern]
if {[string trim $pattern] == ""} {
return
}
#
# After clearing out any old highlight indicators from a previous
# search, we'll be building our search command piece-meal based on
# the current settings of the checkbuttons in the find dialog. The
# first we'll add is a variable to catch the count of the length
# of the string matching the pattern.
#
set precmd "$itk_option(-textwidget) search \
-count [list [itcl::scope _matchLen($this)]]"
if {! [_get case]} {
append precmd " -nocase"
}
if {[_get regexp]} {
append precmd " -regexp"
} else {
append precmd " -exact"
}
#
# If we are going to find all matches, then the start point for
# the search will be the beginning of the text; otherwise, we'll
# use the last known starting point +/- a character depending on
# the direction.
#
if {[_get all]} {
set _searchPoint($itk_option(-textwidget)) 1.0
} else {
if {[_get backwards]} {
append precmd " -backwards"
} else {
append precmd " -forwards"
}
}
#
# Get the pattern to be matched and add it to the search command.
# Since it may contain embedded spaces, we'll wrap it in a list.
#
append precmd " [list $pattern]"
#
# If the search is for all matches, then we'll be performing the
# search until no more matches are found; otherwise, we'll break
# out of the loop after one search.
#
while {1} {
if {[_get all]} {
set postcmd " $_searchPoint($itk_option(-textwidget)) end"
} else {
set postcmd " $_searchPoint($itk_option(-textwidget))"
}
#
# Create the final search command out of the pre and post parts
# and evaluate it which returns the location of the matching string.
#
set cmd {}
append cmd $precmd $postcmd
if {[catch {eval $cmd} matchPoint] != 0} {
set _searchPoint($itk_option(-textwidget)) 1.0
return {}
}
#
# If a match exists, then we'll make this spot be the new starting
# position. Then we'll tag the line and the pattern in the line.
# The foreground and background settings will lite these positions
# in the text widget up.
#
if {$matchPoint != {}} {
set _searchPoint($itk_option(-textwidget)) $matchPoint
$itk_option(-textwidget) tag add search-line \
"$_searchPoint($itk_option(-textwidget)) linestart" \
"$_searchPoint($itk_option(-textwidget))"
$itk_option(-textwidget) tag add search-line \
"$_searchPoint($itk_option(-textwidget)) + \
$_matchLen($this) chars" \
"$_searchPoint($itk_option(-textwidget)) lineend"
$itk_option(-textwidget) tag add search-pattern \
$_searchPoint($itk_option(-textwidget)) \
"$_searchPoint($itk_option(-textwidget)) + \
$_matchLen($this) chars"
}
#
# Set the search point for the next time through to be one
# character more or less from the current search point based
# on the direction.
#
if {[_get all] || ! [_get backwards]} {
set _searchPoint($itk_option(-textwidget)) \
[$itk_option(-textwidget) index \
"$_searchPoint($itk_option(-textwidget)) + 1c"]
} else {
set _searchPoint($itk_option(-textwidget)) \
[$itk_option(-textwidget) index \
"$_searchPoint($itk_option(-textwidget)) - 1c"]
}
#
# If this isn't a find all operation or we didn't get a match, exit.
#
if {(! [_get all]) || ($matchPoint == {})} {
break
}
}
#
# Configure the colors for the search-line and search-pattern.
#
$itk_option(-textwidget) tag configure search-line \
-foreground $itk_option(-searchforeground)
$itk_option(-textwidget) tag configure search-line \
-background $itk_option(-searchbackground)
$itk_option(-textwidget) tag configure search-pattern \
-background $itk_option(-patternbackground)
$itk_option(-textwidget) tag configure search-pattern \
-foreground $itk_option(-patternforeground)
#
# Adjust the view to be the last matched position.
#
if {$matchPoint != {}} {
$itk_option(-textwidget) see $matchPoint
}
#
# There may be multiple matches of the pattern on a single line,
# so we'll set the tag priorities such that the pattern tag is higher.
#
$itk_option(-textwidget) tag raise search-pattern search-line
#
# If a match command is defined, then call it with the match point.
#
if {$itk_option(-matchcommand) != {}} {
[subst $itk_option(-matchcommand)] $matchPoint
}
#
# Return the match point to the caller so they know if we found
# anything and if so where
#
return $matchPoint
}
# ------------------------------------------------------------------
# PROTECTED METHOD: _get setting
#
# Get the current value for the pattern, case, regexp, or backwards.
# ------------------------------------------------------------------
itcl::body ::iwidgets::Finddialog::_get {setting} {
switch $setting {
pattern {
return [$itk_component(pattern) get]
}
case {
return $_optionValues($this-case)
}
regexp {
return $_optionValues($this-regexp)
}
backwards {
return $_optionValues($this-backwards)
}
all {
return $_optionValues($this-all)
}
default {
error "bad get setting: \"$setting\", should be pattern,\
case, regexp, backwards, or all"
}
}
}
# ------------------------------------------------------------------
# PROTECTED METHOD: _textExists
#
# Check the validity of the text widget option. Does it exist and
# is it of the class Text or Scrolledtext.
# ------------------------------------------------------------------
itcl::body ::iwidgets::Finddialog::_textExists {} {
if {$itk_option(-textwidget) == {}} {
return 0
}
if {! [winfo exists $itk_option(-textwidget)]} {
error "bad finddialog text widget value: \"$itk_option(-textwidget)\",\
the widget doesn't exist"
}
if {([winfo class $itk_option(-textwidget)] != "Text") &&
([itcl::find objects -isa iwidgets::Scrolledtext *::$itk_option(-textwidget)] == "")} {
error "bad finddialog text widget value: \"$itk_option(-textwidget)\",\
must be of the class Text or based on Scrolledtext"
}
return 1
}