CAD::Drawing::Template - Replace tags with text and geometry.
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NAME
CAD::Drawing::Template - Replace tags with text and geometry.
SYNOPSIS
my $bp = CAD::Drawing::Template->new();
$bp->load('my_template.dxf');
# set some values for the boiler-plate:
$bp->set_data(foo => 'value for foo');
my @parts = qw(E8955 Q4200);
$bp->set_vtable(parts => \@parts);
$bp->set_geom(birdseye => 'birdseye.dwg');
my $drw = $bp->done(pass => qr/^shipping/, die => 0);
$drw->save('output.dxf');
Input templates must be CAD::Drawing compatible files or objects. These
are brought into the CAD::Drawing::Template object via load() or
import() and searched for 'texts' items which match the formats listed
below.
The tags may be on any layer in the drawing except 'comments' and 'fit'
which are reserved names. The 'comments' layer is completely discarded,
and the 'fit' layer must only contain rectangles (which are necessary
for scaling calculations, but are also discarded.)
The 'tags' are 'texts' entities (single-line text in dwg/dxf formats)
which must begin and end with matching angle-brackets ('<' and '>'.)
These text entities are sourced for their insertion point, text height,
and name. Future versions of this module will support orientations,
fonts, and options within the tag text itself.
In general, tags are formatted as <$type:$name>. Where $type is one of
the types defined below and $name is the name of the tag (to be used in
addressing it via the set_*() functions.
Tag names should adhere to the same rules as perl variable names:
1. Alphanumeric characters (and underscores) only (a-z, A-Z, 0-9, _)
2. Must start with a letter ("a2", not "2a", and not "_2")
3. Case senSitive
The following tag types are supported. Examples show the text string
that would be in the template.
- data
-
A 'data' tag is replaced with a single scalar value.
Examples:
<data:department>
<data:item_code>
<data:A5>
- vtable
-
A 'vtable' tag is replaced with a list of values, each one some distance
below the previous, with the top line's insertion point at the tag's
insertion point.
Examples:
<vtable:revision>
<vtable:part_list>
- geo
-
Loads a drawing and fits it into a rectangle.
NOTE: The rectangle must be on a layer named 'fit' and contain the
insertion point of the tag. Each <geo:name> tag must be within a
rectangle on the 'fit' layer and each rectangle on the 'fit' layer must
have exactly one <geo:name> tag inside of it. If this is not true,
death ensues. These rectangles are removed from the drawing before
output.
While a rectangle may contain two 'geo' tags, each tag must be contained
in one rectangle (the innermost containing rectangle wins.)
Examples:
<geo:section>
<geo:isometric>
- block
-
Loads a drawing to the insertion point.
Examples:
<block:north_arrow>
<block:scale>
- function
-
A 'function' tag calls a perl function, and afterwards behaves like a
data tag. There is no set_function() function, since this tag is
supposed to be fully-automatic.
The function is assumed to be a member of a Perl module. If that module
is not already loaded, it is require()'d within an eval() statement
before the function is called. There is no provision for passing values
to these functions. The function is called in a list context, and the
results joined by spaces. Any errors encountered in calling the
function will be croak()'d along with the function name.
If the module is contained under a non-standard path (one which is not
included in @INC), it should be preceded by a directory path. This
directory is then brought into @INC via the 'use lib' pragma.
Examples:
<function:date> # uses main::date()
<function:Date::Calc::Today>
<function:CAD::Calc::pi>
<function:my_perl_lib/Functions::foo>
AUTHOR
Eric L. Wilhelm <ewilhelm at cpan dot org>
http://scratchcomputing.com
COPYRIGHT
This module is copyright (C) 2004-2006 by Eric L. Wilhelm.
LICENSE
This module is distributed under the same terms as Perl. See the Perl
source package for details.
You may use this software under one of the following licenses:
(1) GNU General Public License
(found at http://www.gnu.org/copyleft/gpl.html)
(2) Artistic License
(found at http://www.perl.com/pub/language/misc/Artistic.html)
Modifications
The source code of this module is made freely available and
distributable under the GPL or Artistic License. Modifications to and
use of this software must adhere to one of these licenses. Changes to
the code should be noted as such and this notification (as well as the
above copyright information) must remain intact on all copies of the
code.
Additionally, while the author is actively developing this code,
notification of any intended changes or extensions would be most helpful
in avoiding repeated work for all parties involved. Please contact the
author with any such development plans.
SEE ALSO
Constructors
new
my $bp = CAD::Drawing::Template->new(%options);
- Valid options
-
pass => [@list], # type:name strings only
clone
Duplicates the boiler-plate as a snapshot in time (useful to save effort
in loops.)
my $bp2 = $bp->clone();
Template Handling
Getting template data in and finished data out.
load
$bp->load($filename);
# or:
$bp->load($drawing_object);
done
$drw = $bp->done(%options);
Options:
pass - array ref of pass-able tags ("type:name" strings)
strict - croak on tags not listed in pass
warnings - carp warnings
default - "drop" or "pass" (default) action for un-passed tags
tag_list
Methods
These methods allow you to manipulate the template.
set_data
Replace the tag's text with a string.
$bp->set_data($name => $value);
# replace the tag <data:department> with the department's name:
$dep = 'Department of Redundancy Department';
$bp->set_data(department => $dep);
set_vtable
Remove the tag entity, and create a series of texts, each spaced
slightly below the previous.
$bp->set_vtable($name => \@list);
# uses the tag: <vtable:revision>
# create a table of revision notes:
my @rev = (
' 1 Changed fonts for PHB',
' 2 Changed fonts back (for same)',
' 3 Removed all text',
);
$bp->set_vtable(revision => \@rev);
set_geo
Load a drawing into the template, scaling it to fit within an enclosing
rectangle.
$bp->set_geo($name => $filename);
# or:
$bp->set_geo($name => $drawing_object);
set_block
Identical to set_geo, except no scaling is performed.
$bp->set_block($name => $filename);
# or:
$bp->set_block($name => $drawing_object);
Guts
These methods are used internally.
Grabs the addresses of all tags which match the regex m/^<.*>$/. Any
which were are in the array @{$self->{pass}} are left untouched.
After finding all of the tags, execute any <function:*> tags which were
found.
$bp->find_tags();
geo_match
Performs the rectangle-tag matching. Must be able to reduce each geo
tag to an innermost enclosing rectangle or dies with much whining.
$bp->geo_match();
run_function
Runs the function $name (in a list context) and places it's results
(joined with spaces) into the string at $addr.
$bp->run_function($name, $addr);
load_drawing
Loads a drawing from a filename or CAD::Drawing object and returns a
CAD::Drawing object.
$drw = $bp->load_drawing($name => $filename);
# or:
$drw = $bp->load_drawing($name => $drawing_object);
Functions
Not object-oriented, and likely not exported.
parse_tag
Break a tag into type, name, and options. When (and if) options are
supported within the tags, they will be handled here.
($type, $name, $options) = parse_tag($tag);
package CAD::Drawing::Template;
our $VERSION = '0.01';
# This code is copyright 2004 Eric L. Wilhelm.
# See below for licensing details.
use warnings;
use strict;
use Carp;
use CAD::Drawing;
use CAD::Calc qw(
iswithin
print_line
);
use Storable qw(dclone);
our @tags = qw(
data
vtable
geo
block
function
);
# allow later configurability:
my $comment_layer = "comment";
my $fit_layer = "fit";
########################################################################
########################################################################
sub new {
my $caller = shift;
my $class = ref($caller) || $caller;
my $self = {@_};
bless($self, $class);
return($self);
} # end subroutine new definition
########################################################################
sub clone {
my $self = shift;
# accept the same options as done() ?
my $ret = dclone($self);
return($ret);
} # end subroutine clone definition
########################################################################
sub load {
my $self = shift;
my $file = shift;
if(ref($file)) {
$self->{drw} = $file;
}
else {
my $drw = CAD::Drawing->new();
$drw->load($file, {nl => ['comment']});
$self->{drw} = $drw;
}
$self->find_tags();
} # end subroutine load definition
########################################################################
sub done {
my $self = shift;
my %options = @_;
my %pass;
if($options{pass}) {
(ref($options{pass}) eq "ARRAY") or
croak("done() option 'pass' must be an array\n");
%pass = map({$_ => 1} @{$options{pass}});
}
else {
carp "strict option without pass"
if $options{strict} and $options{warnings};
}
foreach my $type (keys(%{$self->{tags}})) {
foreach my $name (keys(%{$self->{tags}{$type}})) {
$pass{"$type:$name"} and next;
my $message = "tag not set: '$type:$name'";
$options{strict} and
die "\n DEATH: $message\n";
$options{warnings} and
warn "$message\n";
if($options{default} eq "drop") {
$options{warnings} and
warn "implicit drop of tag: '$type:$name'\n";
my $tag = $self->{tags}{$type}{$name};
my $drw = $self->{drw};
$drw->remove($tag->{addr});
}
else {
$options{warnings} and
warn "implicit passing tag: '$type:$name'\n";
}
}
}
my $drw = $self->{drw};
return($drw);
} # end subroutine done definition
########################################################################
sub tag_list {
my $self = shift;
my @ret;
foreach my $type (keys(%{$self->{tags}})) {
foreach my $item (keys(%{$self->{tags}{$type}})) {
push(@ret, "$type:$item");
}
}
return(@ret);
} # end subroutine tag_list definition
########################################################################
sub set_data {
my $self = shift;
my ($name, $val) = @_;
my $type = 'data';
$self->{tags}{$type}{$name} or
die "no such tag $type:$name\n";
my $drw = $self->{drw};
my $tag = $self->{tags}{$type}{$name};
$drw->Set({string => $val}, $tag->{addr});
delete($self->{tags}{$type}{$name});
} # end subroutine set_data definition
########################################################################
sub set_vtable {
my $self = shift;
my ($name, $val) = @_;
my $type = 'vtable';
$self->{tags}{$type}{$name} or
die "no such tag $type:$name\n";
my $drw = $self->{drw};
my $tag = $self->{tags}{$type}{$name};
my $h = $drw->Get("height", $tag->{addr});
my @pt = $drw->Get("pt", $tag->{addr});
$drw->remove($tag->{addr});
$drw->addtextlines(\@pt, join("\n", @$val),
{height => $h, spacing => 1.2});
delete($self->{tags}{$type}{$name});
} # end subroutine set_vtable definition
########################################################################
sub set_geo {
my $self = shift;
my ($name, $source) = @_;
# print "apply geo $name\n";
my $type = 'geo';
$self->{tags}{$type}{$name} or
die "no such tag $type:$name\n";
my $in = $self->load_drawing($name, $source);
my $drw = $self->{drw};
my $tag = $self->{tags}{$type}{$name};
my @rec = @{$tag->{rectangle}{pts}};
# print "rectangle: @{$rec[0]} x @{$rec[1]}\n";
$in->fit_to_bound(\@rec, 0);
my @list = $in->GroupClone($drw);
$drw->remove($tag->{addr});
$drw->remove($tag->{rectangle}{addr});
delete($self->{tags}{$type}{$name});
# $drw->show(hang => 1);
} # end subroutine set_geo definition
########################################################################
sub set_block {
my $self = shift;
my ($name, $source) = @_;
my $type = 'block';
$self->{tags}{$type}{$name} or
die "no such tag $type:$name\n";
my $in = $self->load_drawing($name, $source);
my $drw = $self->{drw};
my $tag = $self->{tags}{$type}{$name};
my @pt = @{$tag->{pt}};
my @list = $drw->place($in, \@pt);
$drw->remove($tag->{addr});
delete($self->{tags}{$type}{$name});
} # end subroutine set_block definition
########################################################################
sub find_tags {
my $self = shift;
my $drw = $self->{drw};
my %pass;
if(my $pass = $self->{pass}) {
(ref($pass) eq "ARRAY") or
croak "pass => $pass is not an array ref";
foreach my $tag (@$pass) {
$pass{$tag} = 1;
}
}
# first get all of the texts with <>
my @layers = $drw->list_layers();
my $regex = qr/^<.*>$/;
my @addr;
foreach my $layer (@layers) {
push(@addr, $drw->addr_by_regex($layer, $regex));
}
# print scalar(@addr), " texts found\n";
my %tags_okay = map({$_ => 1} @tags);
foreach my $addr (@addr) {
my $tag = $drw->Get("string", $addr);
my ($type, $name, $opts) = parse_tag($tag);
# just ignore pass-through tags
$pass{"$type:$name"} and next;
# print "type: $type, name: $name\n";
$tags_okay{$type} or
croak("$type is not one of @tags\n");
if($type eq "function") {
# print "must call function $name\n";
$self->run_function($name, $addr);
next;
# XXX why would we need to create a tag item for functions?
}
$self->{tags}{$type}{$name} and
croak "multiple tags found for $type:$name\n";
my @pt = $drw->Get("pt", $addr);
$self->{tags}{$type}{$name} = {
pt => \@pt,
type => $type,
name => $name,
addr => $addr,
};
}
# this guy needs to see all of the geo tags
$self->geo_match();
} # end subroutine find_tags definition
########################################################################
sub geo_match {
my $self = shift;
$self->{tags} or die "geo_match called before find_tags?";
my $geo = $self->{tags}{geo};
$geo or return();
my @tags = keys(%$geo);
unless(@tags) {
warn("tags/geo defined, but null!(?)\n");
return();
}
my $drw = $self->{drw};
my @fit_addr = $drw->addr_by_type('fit', 'plines');
(@fit_addr == @tags) or croak("geo (",
scalar(@tags), ")/fit (", scalar(@fit_addr),
") count mismatch\n");
my @recs = map({[$drw->Get("pts", $_)]} @fit_addr);
my @matches;
for(my $i = 0; $i < @recs; $i++) {
for(my $g = 0; $g < @tags; $g++) {
my $addr = $geo->{$tags[$g]}{addr};
my @pt = $drw->Get("pt", $addr);
## print "check ", print_line($recs[$i]), " vs @pt\n";
if(iswithin($recs[$i], \@pt)) {
push(@{$matches[$i]}, $tags[$g]);
}
}
}
# go through matches in least-matched order (thus, the first to
# speak for a tag gets to keep it
my @order = sort(
{
scalar(@{$matches[$a]}) <=>
scalar(@{$matches[$b]})
} 0..$#matches);
my %map_rec;
foreach my $i (@order) {
my @found = @{$matches[$i]};
foreach my $name (@found) {
defined($map_rec{$name}) and next;
$map_rec{$name} = $i;
}
}
foreach my $name (@tags) {
defined($map_rec{$name}) or
die "geo tag $name has no rectangle!\n";
my $i = $map_rec{$name};
# print "rectangle $i connects to $name\n";
$geo->{$name}{rectangle} = {
addr => $fit_addr[$i],
pts => [
($drw->getExtentsRec([$fit_addr[$i]]))[0,2]
],
};
}
} # end subroutine geo_match definition
########################################################################
sub run_function {
my $self = shift;
my ($name, $addr) = @_;
if($name =~ s#^(.*)/+##) {
my $lib = $1;
# print "using lib: $lib\n";
eval("use lib '$lib';");
$@ and croak("problem with lib '$lib'\n\t $@\n");
}
my $mod = 'main';
if($name =~ s/^(.*):://) {
$mod = $1;
eval("require $mod;");
$@ and croak("problem with module '$mod'\n\t: $@\n");
}
if($mod->can($name)) {
my @data = $mod->$name;
my $string = join(" ", @data);
# print "got data '@data' out of $mod->$name\n";
my $drw = $self->{drw};
$drw->Set({string => $string}, $addr);
}
else {
croak("$mod does not define a function named '$name'\n");
}
} # end subroutine run_function definition
########################################################################
sub load_drawing {
my $self = shift;
my ($name, $source) = @_;
my $in;
if(ref($source)) {
# had better be a drw
$in = $source;
}
else {
$in = CAD::Drawing->new();
$in->load($source);
}
return($in);
} # end subroutine load_drawing definition
########################################################################
sub parse_tag {
my ($string) = @_;
my $tag = $string;
# print "tag: $tag\n";
($tag =~ s/^<//) or croak("string: '$string' is invalid\n");
($tag =~ s/>$//) or croak("string: '$string' is invalid\n");
my ($type, $name) = split(/:/, $tag, 2);
# XXX for options, we must parse $type
my $options = {};
return($type, $name, $options);
} # end subroutine parse_tag definition
########################################################################
1;