[dbsrgits/SQL-Translator.git] / lib / SQL / Translator / Producer / Diagram.pm

package SQL::Translator::Producer::Diagram;

# -------------------------------------------------------------------
# $Id: Diagram.pm,v 1.5 2003-08-04 18:44:10 kycl4rk Exp $
# -------------------------------------------------------------------
# Copyright (C) 2003 Ken Y. Clark <kclark@cpan.org>
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; version 2.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
# 02111-1307  USA
# -------------------------------------------------------------------

use strict;
use GD;
use Data::Dumper;
use SQL::Translator::Schema::Constants;
use SQL::Translator::Utils qw(debug);

use vars qw[ $VERSION $DEBUG ];
$VERSION = sprintf "%d.%02d", q$Revision: 1.5 $ =~ /(\d+)\.(\d+)/;
$DEBUG   = 0 unless defined $DEBUG;

use constant VALID_FONT_SIZE => {
    small  => 1,
    medium => 1,
    large  => 1,
    huge   => 1,
};

use constant VALID_IMAGE_TYPE => {
    png  => 1,
    jpeg => 1,
};

sub produce {
    my $t          = shift;
    my $schema     = $t->schema;
    my $args       = $t->producer_args;
    local $DEBUG   = $t->debug;
    debug("Schema =\n", Dumper( $schema ));
    debug("Producer args =\n", Dumper( $args ));

    my $out_file     = $args->{'out_file'}     || '';
    my $image_type   = $args->{'image_type'}   || 'png';
    my $title        = $args->{'title'}        || $t->filename;
    my $font_size    = $args->{'font_size'}    || 'medium';
    my $imap_file    = $args->{'imap_file'}    || '';
    my $imap_url     = $args->{'imap_url'}     || '';
    my $no_columns   = $args->{'no_columns'};
    my $no_lines     = $args->{'no_lines'};
    my $add_color    = $args->{'add_color'};
    my $show_fk_only = $args->{'show_fk_only'};
    my $join_pk_only = $args->{'join_pk_only'};
    my $natural_join = $args->{'natural_join'} || $join_pk_only;
    my $skip_fields  = $args->{'skip_fields'};
    my %skip         = map { s/^\s+|\s+$//g; $_,1 } split (/,/, $skip_fields);

    $schema->make_natural_joins(
        join_pk_only => $join_pk_only,
        skip_fields  => $args->{'skip_fields'},
    ) if $natural_join;

    die "Invalid image type '$image_type'"
        unless VALID_IMAGE_TYPE ->{ $image_type  };
    die "Invalid font size '$font_size'"
        unless VALID_FONT_SIZE->{ $font_size };

    #
    # Layout the image.
    #
    my $font         = 
        $font_size eq 'small'  ? gdTinyFont  :
        $font_size eq 'medium' ? gdSmallFont :
        $font_size eq 'large'  ? gdLargeFont : gdGiantFont;
    my @tables       = $schema->get_tables;
    my $no_tables    = scalar @tables;
    $no_columns      = 0 unless $no_columns =~ /^\d+$/;
    $no_columns    ||= sprintf( "%.0f", sqrt( $no_tables ) + .5 );
    $no_columns    ||= .5;
    my $no_per_col   = sprintf( "%.0f", $no_tables/$no_columns + .5 );

    my @shapes;            
    my ( $max_x, $max_y );          # the furthest x and y used
    my $orig_y      = 40;           # used to reset y for each column
    my ( $x, $y )   = (30,$orig_y); # where to start
    my $cur_col     = 1;            # the current column
    my $no_this_col = 0;            # number of tables in current column
    my $this_col_x  = $x;           # current column's x
    my $gutter      = 30;           # distance b/w columns
    my %nj_registry;                # for locations of fields for natural joins
    my @fk_registry;                # for locations of fields for foreign keys
    my %table_x;                    # for max x of each table
    my $field_no;                   # counter to give distinct no. to each field
    my %coords;                     # holds fields coordinates
    my @imap_coords;                # for making clickable image map
    my %legend;

    for my $table ( @tables ) {
        my $table_name = $table->name;
        my $top        = $y;
        push @shapes, 
            [ 'string', $font, $this_col_x, $y, $table_name, 'black' ];
        $y                   += $font->height + 2;
        my $below_table_name  = $y;
        $y                   += 2;
        my $this_max_x        = 
            $this_col_x + ($font->width * length($table_name));

        debug("Processing table '$table_name'");

        my @fields = $table->get_fields;
        debug("Fields = ", join(', ', map { $_->name } @fields));

        my ( @fld_desc, $max_name );
        for my $f ( @fields ) {
            my $name  = $f->name or next;
            my $is_pk = $f->is_primary_key;

            #
            # Decide if we should skip this field.
            #
            if ( $show_fk_only ) {
                next unless $is_pk || $f->is_foreign_key;
            }

            if ( $is_pk ) {
                $name .= ' *';
                $legend{'Primary key'} = '*';
            }
            elsif ( $f->is_unique ) {
                $name .= ' [U]';
                $legend{'Unique constraint'} = '[U]';
            }

            my $desc = $f->data_type;
            $desc   .= '('.$f->size.')' if $f->size;
            
            my $nlen  = length $name;
            $max_name = $nlen if $nlen > $max_name;
            push @fld_desc, [ $name, $desc, $f->{'name'}, $is_pk ];
        }

        $max_name += 4;
        for my $fld_desc ( @fld_desc ) {
            my ( $name, $desc, $orig_name, $is_pk ) = @$fld_desc;
            my $diff = $max_name - length $name;
            $name   .= ' ' x $diff;
            $desc    = $name . $desc;

            push @shapes, [ 'string', $font, $this_col_x, $y, $desc, 'black' ];
            $y         += $font->height + 2;
            my $length  = $this_col_x + ( $font->width * length( $desc ) );
            $this_max_x = $length if $length > $this_max_x;

            my $constraints = $table->{'fields'}{ $orig_name }{'constraints'};

            if ( $natural_join && !$skip{ $orig_name } ) {
                push @{ $nj_registry{ $orig_name } }, $table_name;
            }

            my $y_link = $y - $font->height/2;
            $coords{ $table_name }{ $orig_name }{'coords'} = {
                left     => [ $this_col_x - 6, $y_link ],
                right    => [ $length + 2    , $y_link ],
                table    => $table_name,
                field_no => ++$field_no,
                is_pk    => $is_pk,
                fld_name => $orig_name,
            };

            push @imap_coords, [ 
                $imap_url."#$table_name-$orig_name",
                $this_col_x, $y - $font->height, $length, $y_link,
            ];
        }

        unless ( $natural_join ) {
            for my $c ( $table->get_constraints ) {
                next unless $c->type eq FOREIGN_KEY;
                my $fk_table = $c->reference_table or next;

                for my $field_name ( $c->fields ) {
                    for my $fk_field ( $c->reference_fields ) {
                        next unless defined $schema->get_table( $fk_table );
                        push @fk_registry, [
                            [ $fk_table  , $fk_field  ],
                            [ $table_name, $field_name ],
                        ];
                    }
                }
            }
        }

        $this_max_x += 5;
        $table_x{ $table_name } = $this_max_x + 5;
        push @shapes, [ 'line', $this_col_x - 5, $below_table_name, 
            $this_max_x, $below_table_name, 'black' ];
        my @bounds = ( $this_col_x - 5, $top - 5, $this_max_x, $y + 5 );
        if ( $add_color ) {
            unshift @shapes, [ 
                'filledRectangle', 
                $bounds[0], $bounds[1],
                $this_max_x, $below_table_name,
                'khaki' 
            ];
            unshift @shapes, [ 'filledRectangle', @bounds, 'white' ];
        }

        push @imap_coords, [ 
            $imap_url."#$table_name",
            $bounds[0], $bounds[1], $this_max_x, $below_table_name,
        ];

        push @shapes, [ 'rectangle', @bounds, 'black' ];
        $max_x = $this_max_x if $this_max_x > $max_x;
        $y    += 25;
        
        if ( ++$no_this_col == $no_per_col ) {# if we've filled up this column
            $cur_col++;                       # up the column number
            $no_this_col = 0;                 # reset the number of tables
            $max_x      += $gutter;           # push the x over for next column
            $this_col_x  = $max_x;            # remember the max x for this col
            $max_y       = $y if $y > $max_y; # note the max y
            $y           = $orig_y;           # reset the y for next column
        }
    }

    #
    # Connect the lines.
    #
    my %horz_taken;
    my %done;
    unless ( $no_lines ) {
        my @position_bunches;

        if ( $natural_join ) {
            for my $field_name ( keys %nj_registry ) {
                my @positions;
                my @table_names = 
                    @{ $nj_registry{ $field_name } || [] } or next;
                next if scalar @table_names == 1;

                for my $table_name ( @table_names ) {
                    push @positions,
                        $coords{ $table_name }{ $field_name }{'coords'};
                }

                push @position_bunches, [ @positions ];
            }
        }
        else {
            for my $pair ( @fk_registry ) {
                push @position_bunches, [ 
                    $coords{$pair->[0][0]}{ $pair->[0][1] }{'coords'},
                    $coords{$pair->[1][0]}{ $pair->[1][1] }{'coords'},
                ];
            }
        }

        my $is_directed = $natural_join ? 0 : 1;

        for my $bunch ( @position_bunches ) {
            my @positions = @$bunch;

            for my $i ( 0 .. $#positions ) {
                my $pos1        = $positions[ $i ];
                my ( $ax, $ay ) = @{ $pos1->{'left'}  || [] } or next;
                my ( $bx, $by ) = @{ $pos1->{'right'} || [] } or next;
                my $table1      = $pos1->{'table'};
                my $fno1        = $pos1->{'field_no'};
                my $is_pk       = $pos1->{'is_pk'};
                next if $join_pk_only and !$is_pk;

                for my $j ( 0 .. $#positions ) {
                    my $pos2        = $positions[ $j ];
                    my ( $cx, $cy ) = @{ $pos2->{'left'}  || [] } or next;
                    my ( $dx, $dy ) = @{ $pos2->{'right'} || [] } or next;
                    my $table2      = $pos2->{'table'};
                    my $fno2        = $pos2->{'field_no'};
                    next if $table1 eq $table2;
                    next if $done{ $fno1 }{ $fno2 };
                    next if $fno1 == $fno2;

                    my @distances = ();
                    push @distances, [
                        abs ( $ax - $cx ) + abs ( $ay - $cy ),
                        [ $ax, $ay, $cx, $cy ],
                        [ 'left', 'left' ]
                    ];
                    push @distances, [
                        abs ( $ax - $dx ) + abs ( $ay - $dy ),
                        [ $ax, $ay, $dx, $dy ],
                        [ 'left', 'right' ],
                    ];
                    push @distances, [
                        abs ( $bx - $cx ) + abs ( $by - $cy ),
                        [ $bx, $by, $cx, $cy ],
                        [ 'right', 'left' ],
                    ];
                    push @distances, [
                        abs ( $bx - $dx ) + abs ( $by - $dy ),
                        [ $bx, $by, $dx, $dy ],
                        [ 'right', 'right' ],
                    ];
                    @distances   = sort { $a->[0] <=> $b->[0] } @distances;
                    my $shortest = $distances[0];
                    my ( $x1, $y1, $x2, $y2 ) = @{ $shortest->[1] };
                    my ( $side1, $side2     ) = @{ $shortest->[2] };
                    my ( $start, $end );
                    my $offset     = 9;
                    my $col1_right = $table_x{ $table1 };
                    my $col2_right = $table_x{ $table2 };

                    my $diff = 0;
                    if ( $x1 == $x2 ) {
                        while ( $horz_taken{ $x1 + $diff } ) {
                            $diff = $side1 eq 'left' ? $diff - 2 : $diff + 2; 
                        }
                        $horz_taken{ $x1 + $diff } = 1;
                    }

                    if ( $side1 eq 'left' ) {
                        $start = $x1 - $offset + $diff;
                    }
                    else {
                        $start = $col1_right + $diff;
                    }

                    if ( $side2 eq 'left' ) {
                        $end = $x2 - $offset + $diff;
                    } 
                    else {
                        $end = $col2_right + $diff;
                    } 

                    push @shapes, 
                        [ 'line', $x1,    $y1, $start, $y1, 'cadetblue' ];
                    push @shapes, 
                        [ 'line', $start, $y1, $end,   $y2, 'cadetblue' ];
                    push @shapes, 
                        [ 'line', $end,   $y2, $x2,    $y2, 'cadetblue' ];

                    if ( $is_directed ) {
                        if (
                            $side1 eq 'right' && $side2 eq 'left'
                            ||
                            $side1 eq 'left' && $side2 eq 'left'
                        ) {
                            push @shapes, [ 
                                'line', $x2 - 3, $y2 - 3, $x2, $y2, 'cadetblue' 
                            ];
                            push @shapes, [ 
                                'line', $x2 - 3, $y2 + 3, $x2, $y2, 'cadetblue' 
                            ];
                            push @shapes, [ 
                                'line', $x2 - 3, $y2 - 3, $x2 - 3, $y2 +3, 
                                'cadetblue' 
                            ];
                        }
                        else {
                            push @shapes, [ 
                                'line', $x2 + 3, $y2 - 3, $x2, $y2, 'cadetblue' 
                            ];
                            push @shapes, [ 
                                'line', $x2 + 3, $y2 + 3, $x2, $y2, 'cadetblue' 
                            ];
                            push @shapes, [ 
                                'line', $x2 + 3, $y2 - 3, $x2 + 3, $y2 +3, 
                                'cadetblue' 
                            ];
                        }
                    }

                    $done{ $fno1 }{ $fno2 } = 1;
                    $done{ $fno2 }{ $fno1 } = 1;
                }
            }
        }
    }

    #
    # Add the title, legend and signature.
    #
    my $large_font = gdLargeFont;
    my $title_len  = $large_font->width * length $title;
    push @shapes, [ 
        'string', $large_font, $max_x/2 - $title_len/2, 10, $title, 'black' 
    ];

    if ( %legend ) {
        $max_y += 5;
        push @shapes, [ 
            'string', $font, $x, $max_y - $font->height - 4, 'Legend', 'black'
        ];
        $max_y += $font->height + 4;

        my $longest;
        for my $len ( map { length $_ } values %legend ) {
            $longest = $len if $len > $longest; 
        }
        $longest += 2;

        while ( my ( $key, $shape ) = each %legend ) {
            my $space = $longest - length $shape;
            push @shapes, [ 
                'string', $font, $x, $max_y - $font->height - 4, 
                join( '', $shape, ' ' x $space, $key ), 'black'
            ];

            $max_y += $font->height + 4;
        }
    }

    my $sig     = __PACKAGE__." $VERSION";
    my $sig_len = $font->width * length $sig;
    push @shapes, [ 
        'string', $font, $max_x - $sig_len, $max_y - $font->height - 4, 
        $sig, 'black'
    ];

    #
    # Render the image.
    #
    my $gd = GD::Image->new( $max_x + 30, $max_y );
    unless ( $gd->can( $image_type ) ) {
        die "GD can't create images of type '$image_type'\n";
    }
    my %colors = map { $_->[0], $gd->colorAllocate( @{$_->[1]} ) } (
        [ white                => [ 255, 255, 255 ] ],
        [ beige                => [ 245, 245, 220 ] ],
        [ black                => [   0,   0,   0 ] ],
        [ lightblue            => [ 173, 216, 230 ] ],
        [ cadetblue            => [  95, 158, 160 ] ],
        [ lightgoldenrodyellow => [ 250, 250, 210 ] ],
        [ khaki                => [ 240, 230, 140 ] ],
        [ red                  => [ 255,   0,   0 ] ],
    );
    $gd->interlaced( 'true' );
    my $background_color = $add_color ? 'lightgoldenrodyellow' : 'white';
    $gd->fill( 0, 0, $colors{ $background_color } );
    for my $shape ( @shapes ) {
        my $method = shift @$shape;
        my $color  = pop   @$shape;
        $gd->$method( @$shape, $colors{ $color } );
    }

    #
    # Make image map.
    #
    debug("imap file = '$imap_file'");
    if ( $imap_file && @imap_coords ) {
        open my $fh, ">$imap_file" or die "Can't write '$imap_file': $!\n";
        print $fh qq[<html><body><img src="" usemap="#imap" border="0">\n].
            qq[<map name="imap">\n];
        for my $rec ( @imap_coords ) {
            my $href = shift @$rec;
            print $fh q[<area coords="].join(',', @$rec).qq[" href="$href">\n];
        } 
        print $fh qq[</body></html>];
        close $fh;
    }

    #
    # Print the image.
    #
    if ( $out_file ) {
        open my $fh, ">$out_file" or die "Can't write '$out_file': $!\n";
        print $fh $gd->$image_type;
        close $fh;
    }
    else {
        return $gd->$image_type;
    }
}

1;

=pod

=head1 NAME

SQL::Translator::Producer::Diagram - ER diagram producer for SQL::Translator

=head1 AUTHOR

Ken Y. Clark E<lt>kclark@cpan.orgE<gt>

=cut
Commit	Line	Data
37503827	1	package SQL::Translator::Producer::Diagram;
	2
	3	# -------------------------------------------------------------------
761a28bb	4	# $Id: Diagram.pm,v 1.5 2003-08-04 18:44:10 kycl4rk Exp $
37503827	5	# -------------------------------------------------------------------
	6	# Copyright (C) 2003 Ken Y. Clark <kclark@cpan.org>
	7	#
	8	# This program is free software; you can redistribute it and/or
	9	# modify it under the terms of the GNU General Public License as
	10	# published by the Free Software Foundation; version 2.
	11	#
	12	# This program is distributed in the hope that it will be useful, but
	13	# WITHOUT ANY WARRANTY; without even the implied warranty of
	14	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	# General Public License for more details.
	16	#
	17	# You should have received a copy of the GNU General Public License
	18	# along with this program; if not, write to the Free Software
	19	# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
	20	# 02111-1307 USA
	21	# -------------------------------------------------------------------
	22
	23	use strict;
	24	use GD;
	25	use Data::Dumper;
761fa621	26	use SQL::Translator::Schema::Constants;
37503827	27	use SQL::Translator::Utils qw(debug);
	28
	29	use vars qw[ $VERSION $DEBUG ];
761a28bb	30	$VERSION = sprintf "%d.%02d", q$Revision: 1.5 $ =~ /(\d+)\.(\d+)/;
37503827	31	$DEBUG = 0 unless defined $DEBUG;
	32
	33	use constant VALID_FONT_SIZE => {
	34	small => 1,
	35	medium => 1,
	36	large => 1,
	37	huge => 1,
	38	};
	39
	40	use constant VALID_IMAGE_TYPE => {
	41	png => 1,
	42	jpeg => 1,
	43	};
	44
	45	sub produce {
761fa621	46	my $t = shift;
761fa621	47	my $schema = $t->schema;
37503827	48	my $args = $t->producer_args;
37503827	49	local $DEBUG = $t->debug;
761fa621	50	debug("Schema =\n", Dumper( $schema ));
37503827	51	debug("Producer args =\n", Dumper( $args ));
37503827	52
6a20798b	53	my $out_file = $args->{'out_file'} \|\| '';
	54	my $image_type = $args->{'image_type'} \|\| 'png';
	55	my $title = $args->{'title'} \|\| $t->filename;
	56	my $font_size = $args->{'font_size'} \|\| 'medium';
	57	my $imap_file = $args->{'imap_file'} \|\| '';
	58	my $imap_url = $args->{'imap_url'} \|\| '';
37503827	59	my $no_columns = $args->{'no_columns'};
	60	my $no_lines = $args->{'no_lines'};
	61	my $add_color = $args->{'add_color'};
	62	my $show_fk_only = $args->{'show_fk_only'};
	63	my $join_pk_only = $args->{'join_pk_only'};
	64	my $natural_join = $args->{'natural_join'} \|\| $join_pk_only;
	65	my $skip_fields = $args->{'skip_fields'};
761fa621	66	my %skip = map { s/^\s+\|\s+$//g; $_,1 } split (/,/, $skip_fields);
	67
	68	$schema->make_natural_joins(
	69	join_pk_only => $join_pk_only,
	70	skip_fields => $args->{'skip_fields'},
	71	) if $natural_join;
37503827	72
	73	die "Invalid image type '$image_type'"
	74	unless VALID_IMAGE_TYPE ->{ $image_type };
	75	die "Invalid font size '$font_size'"
	76	unless VALID_FONT_SIZE->{ $font_size };
	77
	78	#
	79	# Layout the image.
	80	#
	81	my $font =
	82	$font_size eq 'small' ? gdTinyFont :
	83	$font_size eq 'medium' ? gdSmallFont :
	84	$font_size eq 'large' ? gdLargeFont : gdGiantFont;
761fa621	85	my @tables = $schema->get_tables;
761fa621	86	my $no_tables = scalar @tables;
550022e5	87	$no_columns = 0 unless $no_columns =~ /^\d+$/;
37503827	88	$no_columns \|\|= sprintf( "%.0f", sqrt( $no_tables ) + .5 );
	89	$no_columns \|\|= .5;
	90	my $no_per_col = sprintf( "%.0f", $no_tables/$no_columns + .5 );
	91
	92	my @shapes;
	93	my ( $max_x, $max_y ); # the furthest x and y used
	94	my $orig_y = 40; # used to reset y for each column
	95	my ( $x, $y ) = (30,$orig_y); # where to start
	96	my $cur_col = 1; # the current column
	97	my $no_this_col = 0; # number of tables in current column
	98	my $this_col_x = $x; # current column's x
	99	my $gutter = 30; # distance b/w columns
	100	my %nj_registry; # for locations of fields for natural joins
	101	my @fk_registry; # for locations of fields for foreign keys
	102	my %table_x; # for max x of each table
	103	my $field_no; # counter to give distinct no. to each field
761fa621	104	my %coords; # holds fields coordinates
6a20798b	105	my @imap_coords; # for making clickable image map
37503827	106	my %legend;
37503827	107
761fa621	108	for my $table ( @tables ) {
761fa621	109	my $table_name = $table->name;
37503827	110	my $top = $y;
	111	push @shapes,
	112	[ 'string', $font, $this_col_x, $y, $table_name, 'black' ];
37503827	113	$y += $font->height + 2;
	114	my $below_table_name = $y;
	115	$y += 2;
	116	my $this_max_x =
	117	$this_col_x + ($font->width * length($table_name));
	118
	119	debug("Processing table '$table_name'");
	120
761fa621	121	my @fields = $table->get_fields;
761fa621	122	debug("Fields = ", join(', ', map { $_->name } @fields));
37503827	123
	124	my ( @fld_desc, $max_name );
	125	for my $f ( @fields ) {
761fa621	126	my $name = $f->name or next;
761fa621	127	my $is_pk = $f->is_primary_key;
37503827	128
	129	#
	130	# Decide if we should skip this field.
	131	#
	132	if ( $show_fk_only ) {
761fa621	133	next unless $is_pk \|\| $f->is_foreign_key;
37503827	134	}
	135
	136	if ( $is_pk ) {
	137	$name .= ' *';
	138	$legend{'Primary key'} = '*';
	139	}
761fa621	140	elsif ( $f->is_unique ) {
37503827	141	$name .= ' [U]';
	142	$legend{'Unique constraint'} = '[U]';
	143	}
	144
761fa621	145	my $desc = $f->data_type;
761fa621	146	$desc .= '('.$f->size.')' if $f->size;
37503827	147
	148	my $nlen = length $name;
	149	$max_name = $nlen if $nlen > $max_name;
	150	push @fld_desc, [ $name, $desc, $f->{'name'}, $is_pk ];
	151	}
	152
	153	$max_name += 4;
	154	for my $fld_desc ( @fld_desc ) {
	155	my ( $name, $desc, $orig_name, $is_pk ) = @$fld_desc;
	156	my $diff = $max_name - length $name;
	157	$name .= ' ' x $diff;
	158	$desc = $name . $desc;
	159
	160	push @shapes, [ 'string', $font, $this_col_x, $y, $desc, 'black' ];
	161	$y += $font->height + 2;
	162	my $length = $this_col_x + ( $font->width * length( $desc ) );
	163	$this_max_x = $length if $length > $this_max_x;
	164
	165	my $constraints = $table->{'fields'}{ $orig_name }{'constraints'};
	166
	167	if ( $natural_join && !$skip{ $orig_name } ) {
	168	push @{ $nj_registry{ $orig_name } }, $table_name;
	169	}
37503827	170
37503827	171	my $y_link = $y - $font->height/2;
761fa621	172	$coords{ $table_name }{ $orig_name }{'coords'} = {
37503827	173	left => [ $this_col_x - 6, $y_link ],
	174	right => [ $length + 2 , $y_link ],
	175	table => $table_name,
	176	field_no => ++$field_no,
	177	is_pk => $is_pk,
	178	fld_name => $orig_name,
	179	};
6a20798b	180
	181	push @imap_coords, [
	182	$imap_url."#$table_name-$orig_name",
	183	$this_col_x, $y - $font->height, $length, $y_link,
	184	];
37503827	185	}
37503827	186
761fa621	187	unless ( $natural_join ) {
	188	for my $c ( $table->get_constraints ) {
	189	next unless $c->type eq FOREIGN_KEY;
	190	my $fk_table = $c->reference_table or next;
	191
	192	for my $field_name ( $c->fields ) {
	193	for my $fk_field ( $c->reference_fields ) {
	194	next unless defined $schema->get_table( $fk_table );
	195	push @fk_registry, [
761fa621	196	[ $fk_table , $fk_field ],
761a28bb	197	[ $table_name, $field_name ],
761fa621	198	];
	199	}
	200	}
	201	}
	202	}
	203
37503827	204	$this_max_x += 5;
	205	$table_x{ $table_name } = $this_max_x + 5;
	206	push @shapes, [ 'line', $this_col_x - 5, $below_table_name,
	207	$this_max_x, $below_table_name, 'black' ];
	208	my @bounds = ( $this_col_x - 5, $top - 5, $this_max_x, $y + 5 );
	209	if ( $add_color ) {
	210	unshift @shapes, [
	211	'filledRectangle',
	212	$bounds[0], $bounds[1],
	213	$this_max_x, $below_table_name,
	214	'khaki'
	215	];
	216	unshift @shapes, [ 'filledRectangle', @bounds, 'white' ];
	217	}
6a20798b	218
	219	push @imap_coords, [
	220	$imap_url."#$table_name",
	221	$bounds[0], $bounds[1], $this_max_x, $below_table_name,
	222	];
	223
37503827	224	push @shapes, [ 'rectangle', @bounds, 'black' ];
	225	$max_x = $this_max_x if $this_max_x > $max_x;
	226	$y += 25;
	227
	228	if ( ++$no_this_col == $no_per_col ) {# if we've filled up this column
	229	$cur_col++; # up the column number
	230	$no_this_col = 0; # reset the number of tables
	231	$max_x += $gutter; # push the x over for next column
	232	$this_col_x = $max_x; # remember the max x for this col
	233	$max_y = $y if $y > $max_y; # note the max y
	234	$y = $orig_y; # reset the y for next column
	235	}
	236	}
	237
	238	#
	239	# Connect the lines.
	240	#
	241	my %horz_taken;
	242	my %done;
	243	unless ( $no_lines ) {
	244	my @position_bunches;
	245
	246	if ( $natural_join ) {
	247	for my $field_name ( keys %nj_registry ) {
	248	my @positions;
	249	my @table_names =
	250	@{ $nj_registry{ $field_name } \|\| [] } or next;
	251	next if scalar @table_names == 1;
	252
	253	for my $table_name ( @table_names ) {
	254	push @positions,
761fa621	255	$coords{ $table_name }{ $field_name }{'coords'};
37503827	256	}
	257
	258	push @position_bunches, [ @positions ];
	259	}
	260	}
	261	else {
	262	for my $pair ( @fk_registry ) {
	263	push @position_bunches, [
761fa621	264	$coords{$pair->[0][0]}{ $pair->[0][1] }{'coords'},
761fa621	265	$coords{$pair->[1][0]}{ $pair->[1][1] }{'coords'},
37503827	266	];
	267	}
	268	}
	269
	270	my $is_directed = $natural_join ? 0 : 1;
	271
	272	for my $bunch ( @position_bunches ) {
	273	my @positions = @$bunch;
	274
	275	for my $i ( 0 .. $#positions ) {
	276	my $pos1 = $positions[ $i ];
	277	my ( $ax, $ay ) = @{ $pos1->{'left'} \|\| [] } or next;
	278	my ( $bx, $by ) = @{ $pos1->{'right'} \|\| [] } or next;
	279	my $table1 = $pos1->{'table'};
	280	my $fno1 = $pos1->{'field_no'};
	281	my $is_pk = $pos1->{'is_pk'};
	282	next if $join_pk_only and !$is_pk;
	283
	284	for my $j ( 0 .. $#positions ) {
	285	my $pos2 = $positions[ $j ];
	286	my ( $cx, $cy ) = @{ $pos2->{'left'} \|\| [] } or next;
	287	my ( $dx, $dy ) = @{ $pos2->{'right'} \|\| [] } or next;
	288	my $table2 = $pos2->{'table'};
	289	my $fno2 = $pos2->{'field_no'};
	290	next if $table1 eq $table2;
	291	next if $done{ $fno1 }{ $fno2 };
	292	next if $fno1 == $fno2;
	293
	294	my @distances = ();
	295	push @distances, [
	296	abs ( $ax - $cx ) + abs ( $ay - $cy ),
	297	[ $ax, $ay, $cx, $cy ],
	298	[ 'left', 'left' ]
	299	];
	300	push @distances, [
	301	abs ( $ax - $dx ) + abs ( $ay - $dy ),
	302	[ $ax, $ay, $dx, $dy ],
	303	[ 'left', 'right' ],
	304	];
	305	push @distances, [
	306	abs ( $bx - $cx ) + abs ( $by - $cy ),
	307	[ $bx, $by, $cx, $cy ],
	308	[ 'right', 'left' ],
	309	];
	310	push @distances, [
	311	abs ( $bx - $dx ) + abs ( $by - $dy ),
	312	[ $bx, $by, $dx, $dy ],
	313	[ 'right', 'right' ],
	314	];
	315	@distances = sort { $a->[0] <=> $b->[0] } @distances;
	316	my $shortest = $distances[0];
	317	my ( $x1, $y1, $x2, $y2 ) = @{ $shortest->[1] };
	318	my ( $side1, $side2 ) = @{ $shortest->[2] };
	319	my ( $start, $end );
	320	my $offset = 9;
	321	my $col1_right = $table_x{ $table1 };
	322	my $col2_right = $table_x{ $table2 };
	323
	324	my $diff = 0;
	325	if ( $x1 == $x2 ) {
	326	while ( $horz_taken{ $x1 + $diff } ) {
	327	$diff = $side1 eq 'left' ? $diff - 2 : $diff + 2;
	328	}
	329	$horz_taken{ $x1 + $diff } = 1;
330	}
331
332	if ( $side1 eq 'left' ) {
333	$start = $x1 - $offset + $diff;
334	}
335	else {
336	$start = $col1_right + $diff;
337	}
338
339	if ( $side2 eq 'left' ) {
340	$end = $x2 - $offset + $diff;
341	}
342	else {
343	$end = $col2_right + $diff;
344	}
345
346	push @shapes,
347	[ 'line', $x1, $y1, $start, $y1, 'cadetblue' ];
348	push @shapes,
349	[ 'line', $start, $y1, $end, $y2, 'cadetblue' ];
350	push @shapes,
351	[ 'line', $end, $y2, $x2, $y2, 'cadetblue' ];
352
353	if ( $is_directed ) {
354	if (
355	$side1 eq 'right' && $side2 eq 'left'
356	\|\|
357	$side1 eq 'left' && $side2 eq 'left'
358	) {
359	push @shapes, [
360	'line', $x2 - 3, $y2 - 3, $x2, $y2, 'cadetblue'
361	];
362	push @shapes, [
363	'line', $x2 - 3, $y2 + 3, $x2, $y2, 'cadetblue'
364	];
365	push @shapes, [
366	'line', $x2 - 3, $y2 - 3, $x2 - 3, $y2 +3,
367	'cadetblue'
368	];
369	}
370	else {
371	push @shapes, [
372	'line', $x2 + 3, $y2 - 3, $x2, $y2, 'cadetblue'
373	];
374	push @shapes, [
375	'line', $x2 + 3, $y2 + 3, $x2, $y2, 'cadetblue'
376	];
377	push @shapes, [
378	'line', $x2 + 3, $y2 - 3, $x2 + 3, $y2 +3,
379	'cadetblue'
380	];
381	}
382	}
383
384	$done{ $fno1 }{ $fno2 } = 1;
385	$done{ $fno2 }{ $fno1 } = 1;
386	}
387	}
388	}
389	}
390
391	#
392	# Add the title, legend and signature.
393	#
394	my $large_font = gdLargeFont;
395	my $title_len = $large_font->width * length $title;
396	push @shapes, [
397	'string', $large_font, $max_x/2 - $title_len/2, 10, $title, 'black'
398	];
399
400	if ( %legend ) {
401	$max_y += 5;
402	push @shapes, [
403	'string', $font, $x, $max_y - $font->height - 4, 'Legend', 'black'
404	];
405	$max_y += $font->height + 4;
406
407	my $longest;
408	for my $len ( map { length $_ } values %legend ) {
409	$longest = $len if $len > $longest;
410	}
411	$longest += 2;
412
413	while ( my ( $key, $shape ) = each %legend ) {
414	my $space = $longest - length $shape;
415	push @shapes, [
416	'string', $font, $x, $max_y - $font->height - 4,
417	join( '', $shape, ' ' x $space, $key ), 'black'
418	];
419
420	$max_y += $font->height + 4;
421	}
422	}
423
424	my $sig = __PACKAGE__." $VERSION";
425	my $sig_len = $font->width * length $sig;
426	push @shapes, [
427	'string', $font, $max_x - $sig_len, $max_y - $font->height - 4,
428	$sig, 'black'
429	];
430
431	#
432	# Render the image.
433	#
434	my $gd = GD::Image->new( $max_x + 30, $max_y );
435	unless ( $gd->can( $image_type ) ) {
436	die "GD can't create images of type '$image_type'\n";
437	}
438	my %colors = map { $_->[0], $gd->colorAllocate( @{$_->[1]} ) } (
439	[ white => [ 255, 255, 255 ] ],
440	[ beige => [ 245, 245, 220 ] ],
441	[ black => [ 0, 0, 0 ] ],
442	[ lightblue => [ 173, 216, 230 ] ],
443	[ cadetblue => [ 95, 158, 160 ] ],
444	[ lightgoldenrodyellow => [ 250, 250, 210 ] ],
445	[ khaki => [ 240, 230, 140 ] ],
446	[ red => [ 255, 0, 0 ] ],
447	);
448	$gd->interlaced( 'true' );
449	my $background_color = $add_color ? 'lightgoldenrodyellow' : 'white';
450	$gd->fill( 0, 0, $colors{ $background_color } );
451	for my $shape ( @shapes ) {
452	my $method = shift @$shape;
453	my $color = pop @$shape;
454	$gd->$method( @$shape, $colors{ $color } );
455	}
456
457	#
6a20798b	458	# Make image map.
	459	#
	460	debug("imap file = '$imap_file'");
	461	if ( $imap_file && @imap_coords ) {
	462	open my $fh, ">$imap_file" or die "Can't write '$imap_file': $!\n";
	463	print $fh qq[<html><body><img src="" usemap="#imap" border="0">\n].
	464	qq[<map name="imap">\n];
	465	for my $rec ( @imap_coords ) {
	466	my $href = shift @$rec;
	467	print $fh q[<area coords="].join(',', @$rec).qq[" href="$href">\n];
	468	}
	469	print $fh qq[</body></html>];
	470	close $fh;
	471	}
	472
	473	#
37503827	474	# Print the image.
	475	#
	476	if ( $out_file ) {
	477	open my $fh, ">$out_file" or die "Can't write '$out_file': $!\n";
	478	print $fh $gd->$image_type;
	479	close $fh;
	480	}
	481	else {
550022e5	482	return $gd->$image_type;
37503827	483	}
	484	}
	485
	486	1;
	487
	488	=pod
	489
	490	=head1 NAME
	491
	492	SQL::Translator::Producer::Diagram - ER diagram producer for SQL::Translator
	493
	494	=head1 AUTHOR
	495
	496	Ken Y. Clark E<lt>kclark@cpan.orgE<gt>
	497
	498	=cut