/usr/share/perl5/Config/Model/Tk/LeafEditor.pm is in libconfig-model-tkui-perl 1.365-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# This file is part of Config-Model-TkUI
#
# This software is Copyright (c) 2008-2017 by Dominique Dumont.
#
# This is free software, licensed under:
#
# The GNU Lesser General Public License, Version 2.1, February 1999
#
package Config::Model::Tk::LeafEditor;
$Config::Model::Tk::LeafEditor::VERSION = '1.365';
use strict;
use warnings;
use Carp;
use Log::Log4perl;
use Config::Model::Tk::NoteEditor;
use Path::Tiny;
use Tk::Balloon;
use base qw/Config::Model::Tk::LeafViewer/;
Construct Tk::Widget 'ConfigModelLeafEditor';
my @fbe1 = qw/-fill both -expand 1/;
my @fxe1 = qw/-fill x -expand 1/;
my @fx = qw/-fill x /;
my $logger = Log::Log4perl::get_logger("Tk::LeafEditor");
sub ClassInit {
my ( $cw, $args ) = @_;
# ClassInit is often used to define bindings and/or other
# resources shared by all instances, e.g., images.
# cw->Advertise(name=>$widget);
}
sub Populate {
my ( $cw, $args ) = @_;
my $leaf = $cw->{leaf} = delete $args->{-item}
|| die "LeafEditor: no -item, got ", keys %$args;
delete $args->{-path};
$cw->{store_cb} = delete $args->{-store_cb} || die __PACKAGE__, "no -store_cb";
my $cme_font = delete $args->{-font};
my $inst = $leaf->instance;
my $vt = $leaf->value_type;
$logger->info("Creating leaf editor for value_type $vt");
$cw->{value} = $leaf->fetch( check => 'no', mode => 'user' );
$logger->info( "Creating leaf editor with error " . $leaf->error_msg );
$cw->add_header( Edit => $leaf )->pack(@fx);
my $vref = \$cw->{value};
my @pack_args = @fx;
@pack_args = @fbe1
if $vt eq 'string'
or $vt eq 'enum'
or $vt eq 'reference';
my $ed_frame = $cw->Frame(qw/-relief raised -borderwidth 2/)->pack(@pack_args);
$ed_frame->Label( -text => 'Edit value' )->pack();
my $balloon = $cw->Balloon( -state => 'balloon' );
if ( $vt eq 'string' ) {
$cw->{e_widget} = $ed_frame->Scrolled(
'Text',
-height => 5,
-scrollbars => 'ow',
)->pack(@fbe1);
$cw->{e_widget}->tagConfigure(qw/value -lmargin1 2 -lmargin2 2 -rmargin 2/);
$cw->reset_value;
my $bframe = $cw->add_buttons($ed_frame);
$bframe->Button(
-text => 'Cleanup',
-command => sub { $cw->cleanup },
)->pack( -side => 'left' );
my $ext_ed_b = $bframe->Button(
-text => 'Ext editor',
-command => sub { $cw->exec_external_editor },
-state => defined $ENV{EDITOR} ? 'normal' : 'disabled',
)->pack( -side => 'left' );
$balloon->attach( $ext_ed_b,
-msg => "Run external editor (if EDITOR environment variable is set" );
}
elsif ( $vt eq 'boolean' ) {
$ed_frame->Checkbutton(
-text => $leaf->element_name,
-variable => $vref,
-command => sub { $cw->try },
)->pack();
$cw->add_buttons($ed_frame);
}
elsif ( $vt eq 'uniline' or $vt eq 'integer' ) {
$ed_frame->Entry( -textvariable => $vref )->pack(@fx);
$cw->add_buttons($ed_frame);
}
elsif ( $vt eq 'enum' or $vt eq 'reference' ) {
my $lb = $ed_frame->Scrolled(
'Listbox',
-height => 5,
-scrollbars => 'osow',
#-listvariable => $vref,
#-selectmode => 'single',
)->pack(@fbe1);
my @choice = $leaf->get_choice;
$lb->insert( 'end', $leaf->get_choice );
my $idx = 0;
if ( defined $$vref ) {
map { $lb->selectionSet($idx) if $_ eq $$vref; $idx++ } @choice;
}
$lb->bind( '<Button-1>', sub { $cw->try( $lb->get( $lb->curselection() ) ) } );
$cw->add_buttons($ed_frame);
}
$cw->ConfigModelNoteEditor( -object => $leaf )->pack;
$cw->add_warning( $leaf, 'edit' )->pack(@fx);
$cw->add_info_button()->pack( @fx, qw/-anchor n/ );
$cw->add_summary($leaf)->pack(@fx);
$cw->add_description($leaf)->pack(@fbe1);
my ( $help_frame, $help_widget ) = $cw->add_help( 'help on value' => '', 1 );
$help_frame->pack(@fx);
$cw->Advertise( value_help_widget => $help_widget );
$cw->Advertise( value_help_frame => $help_frame );
$cw->set_value_help;
$cw->ConfigSpecs(
-font => [['SELF','DESCENDANTS'], 'font','Font', $cme_font ],
#-fill => [ qw/SELF fill Fill both/],
#-expand => [ qw/SELF expand Expand 1/],
-relief => [qw/SELF relief Relief groove/],
-borderwidth => [qw/SELF borderwidth Borderwidth 2/],
DEFAULT => [qw/SELF/],
);
# don't call directly SUPER::Populate as it's LeafViewer's populate
$cw->Tk::Frame::Populate($args);
}
sub cleanup {
my ($cw) = @_;
my $text_widget = $cw->{e_widget} || return;
my $selected = $text_widget->getSelected;
my $text = $selected || $text_widget->Contents;
$text =~ s/^\s+//gm;
$text =~ s/\s+$//gm;
$text =~ s/\s+/ /g;
if ($selected) {
$text_widget->Insert($text);
}
else {
$text_widget->Contents($text);
}
}
sub add_buttons {
my ( $cw, $frame ) = @_;
my $bframe = $frame->Frame->pack();
my $balloon = $cw->Balloon( -state => 'balloon' );
my $reset_b = $bframe->Button(
-text => 'Reset',
-command => sub { $cw->reset_value; },
)->pack( -side => 'left' );
$balloon->attach( $reset_b, -msg => "reset entry value from tree value" );
my $del_label = defined $cw->{leaf}->fetch_standard ? 'Back to default' : 'Delete';
$bframe->Button(
-text => $del_label,
-command => sub { $cw->delete },
)->pack( -side => 'left' );
my $store_b = $bframe->Button(
-text => 'Store',
-command => sub { $cw->store },
)->pack( -side => 'right' );
$balloon->attach( $store_b, -msg => "store entry value in config tree" );
return $bframe;
}
sub try {
my $cw = shift;
my $v = shift;
if ( defined $v ) {
$cw->{value} = $v;
}
else {
my $e_w = $cw->{e_widget};
# tk widget use a reference
$v =
defined $e_w
? $e_w->get( '1.0', 'end' )
: $cw->{value};
}
$v = '' unless defined $v;
chomp $v;
$logger->debug("try: value $v");
require Tk::Dialog;
my @errors = $cw->{leaf}->check( value => $v, quiet => 1 );
if (@errors) {
$cw->Dialog(
-title => 'Value error',
-text => join( "\n", @errors ),
-font => scalar $cw->cget('-font'),
)->Show;
$cw->reset_value;
return;
}
else {
$cw->set_value_help($v);
return $v;
}
}
sub delete {
my $cw = shift;
eval { $cw->{leaf}->store(undef); };
if ($@) {
$cw->Dialog(
-title => 'Delete error',
-text => ref($@) ? $@->as_string : $@,
)->Show;
}
else {
# trigger redraw of Tk Tree
$cw->reset_value;
$cw->update_warning( $cw->{leaf} );
$cw->{store_cb}->();
}
}
# can be used without parameters to store value from widget into config tree
sub store {
my $cw = shift;
my $arg = shift;
my $e_w = $cw->{e_widget};
# tk widget use a reference
my $v = defined $arg ? $arg
: defined $e_w ? $e_w->get( '1.0', 'end' )
: $cw->{value};
$v = '' unless defined $v;
chomp $v;
print "Storing '$v'\n";
my $leaf = $cw->{leaf};
eval { $leaf->store($v); };
if ($@) {
$cw->Dialog (
-title => 'Value error',
-text => $@->as_string,
-font => scalar $cw->cget('-font'),
)->Show;
$cw->reset_value;
}
elsif ($leaf->has_error) {
$cw->Dialog (
-title => 'Value error',
-text => "Cannot store the value:\n* ".join("\n* ",$leaf->all_errors),
-font => scalar $cw->cget('-font'),
)->Show;
$cw->reset_value;
}
else {
# trigger redraw of Tk Tree
$cw->{store_cb}->();
$cw->update_warning( $leaf );
}
}
sub set_value_help {
my $cw = shift;
my $v = $cw->{value};
my $value_help = defined $v ? $cw->{leaf}->get_help($v) : '';
my $w = $cw->Subwidget('value_help_widget');
my $f = $cw->Subwidget('value_help_frame');
if ($value_help) {
#$w->delete( '0.0', 'end' );
#$w->insert( 'end', $value_help ) ;
$cw->update_help( $w, $value_help );
$f->pack(@fbe1);
}
else {
$f->packForget;
}
}
sub reset_value {
my $cw = shift;
$cw->{value} = $cw->{leaf}->fetch( check => 'no' );
if ( defined $cw->{e_widget} ) {
$cw->{e_widget}->delete( '1.0', 'end' );
$cw->{e_widget}->insert( 'end', $cw->{value}, 'value' );
}
$cw->set_value_help if defined $cw->{value_help_widget};
}
sub exec_external_editor {
my $cw = shift;
my @pt_args;
# ugly hack to use pod mode only for Model description parameter
# i.e. for 'cme meta edit;
my $leaf = $cw->{leaf};
if ($leaf->parent->config_class_name =~ /^Itself/ and
$leaf->element_name =~ /description/
) {
# the .pod suffix let the editor use the correct mode
@pt_args = (SUFFIX => '.pod');
}
my $pt = Path::Tiny->tempfile(@pt_args);
die "Can't create Path::Tiny:$!" unless defined $pt;
$pt->spew_utf8( $cw->{e_widget}->get( '1.0', 'end' ) );
# See mastering Perl/Tk p382
my $h = $cw->{ed_handle} = IO::Handle->new;
die "IO::Handle->new failed." unless defined $h;
my $ed = $ENV{EDITOR} . ' ' . $pt->canonpath;
$cw->{ed_pid} = open $h, $ed . ' 2>&1 |';
if ( not defined $cw->{ed_pid} ) {
$cw->Dialog(
-title => 'External editor error',
-text => "'$ed' : $!",
-font => scalar $cw->cget('-font'),
)->Show;
return;
}
$h->autoflush(1);
$cw->fileevent( $h, 'readable' => [ \&_read_stdout, $cw ] );
# prevent navigation in the tree (and destruction of this widget
# while the external editor is active). See mastering Perl/Tk p302
$cw->grab;
$cw->waitVariable( \$cw->{ed_done} );
$cw->grabRelease;
my $new_v = $pt->slurp_utf8();
print "exec_external_editor done with '$new_v'\n";
$cw->store($new_v);
$cw->reset_value;
}
# also from Mastering Perl/Tk
sub _read_stdout {
# Called when input is available for the output window. Also checks
# to see if the user has clicked Cancel.
print "_read_stdout called\n";
my ($cw) = @_;
my $h = $cw->{ed_handle};
die "External editor handle is udefined!\n" unless defined $h;
my $stat;
if ( $stat = sysread $h, $_, 4096 ) {
print;
}
elsif ( $stat == 0 ) {
print "edition done\n";
$h->close;
$cw->{ed_done} = 1;
}
else {
die "External editor sysread error: $!";
}
} # end _read_stdout
sub reload {
my $cw = shift;
$cw->reset_value;
$cw->update_warning( $cw->{leaf} );
}
1;
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