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1 | package SQL::Translator::Producer::Diagram; |
2 | |
3 | # ------------------------------------------------------------------- |
761fa621 |
4 | # $Id: Diagram.pm,v 1.3 2003-06-09 04:40:50 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 ]; |
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30 | $VERSION = sprintf "%d.%02d", q$Revision: 1.3 $ =~ /(\d+)\.(\d+)/; |
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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 { |
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46 | my $t = shift; |
47 | my $schema = $t->schema; |
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48 | my $args = $t->producer_args; |
49 | local $DEBUG = $t->debug; |
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50 | debug("Schema =\n", Dumper( $schema )); |
37503827 |
51 | debug("Producer args =\n", Dumper( $args )); |
52 | |
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 $no_columns = $args->{'no_columns'}; |
58 | my $no_lines = $args->{'no_lines'}; |
59 | my $add_color = $args->{'add_color'}; |
60 | my $show_fk_only = $args->{'show_fk_only'}; |
61 | my $join_pk_only = $args->{'join_pk_only'}; |
62 | my $natural_join = $args->{'natural_join'} || $join_pk_only; |
63 | my $skip_fields = $args->{'skip_fields'}; |
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64 | my %skip = map { s/^\s+|\s+$//g; $_,1 } split (/,/, $skip_fields); |
65 | |
66 | $schema->make_natural_joins( |
67 | join_pk_only => $join_pk_only, |
68 | skip_fields => $args->{'skip_fields'}, |
69 | ) if $natural_join; |
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70 | |
71 | die "Invalid image type '$image_type'" |
72 | unless VALID_IMAGE_TYPE ->{ $image_type }; |
73 | die "Invalid font size '$font_size'" |
74 | unless VALID_FONT_SIZE->{ $font_size }; |
75 | |
76 | # |
77 | # Layout the image. |
78 | # |
79 | my $font = |
80 | $font_size eq 'small' ? gdTinyFont : |
81 | $font_size eq 'medium' ? gdSmallFont : |
82 | $font_size eq 'large' ? gdLargeFont : gdGiantFont; |
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83 | my @tables = $schema->get_tables; |
84 | my $no_tables = scalar @tables; |
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85 | $no_columns = 0 unless $no_columns =~ /^\d+$/; |
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86 | $no_columns ||= sprintf( "%.0f", sqrt( $no_tables ) + .5 ); |
87 | $no_columns ||= .5; |
88 | my $no_per_col = sprintf( "%.0f", $no_tables/$no_columns + .5 ); |
89 | |
90 | my @shapes; |
91 | my ( $max_x, $max_y ); # the furthest x and y used |
92 | my $orig_y = 40; # used to reset y for each column |
93 | my ( $x, $y ) = (30,$orig_y); # where to start |
94 | my $cur_col = 1; # the current column |
95 | my $no_this_col = 0; # number of tables in current column |
96 | my $this_col_x = $x; # current column's x |
97 | my $gutter = 30; # distance b/w columns |
98 | my %nj_registry; # for locations of fields for natural joins |
99 | my @fk_registry; # for locations of fields for foreign keys |
100 | my %table_x; # for max x of each table |
101 | my $field_no; # counter to give distinct no. to each field |
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102 | my %coords; # holds fields coordinates |
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103 | my %legend; |
104 | |
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105 | for my $table ( @tables ) { |
106 | my $table_name = $table->name; |
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107 | my $top = $y; |
108 | push @shapes, |
109 | [ 'string', $font, $this_col_x, $y, $table_name, 'black' ]; |
110 | |
111 | $y += $font->height + 2; |
112 | my $below_table_name = $y; |
113 | $y += 2; |
114 | my $this_max_x = |
115 | $this_col_x + ($font->width * length($table_name)); |
116 | |
117 | debug("Processing table '$table_name'"); |
118 | |
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119 | my @fields = $table->get_fields; |
120 | debug("Fields = ", join(', ', map { $_->name } @fields)); |
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121 | |
122 | my ( @fld_desc, $max_name ); |
123 | for my $f ( @fields ) { |
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124 | my $name = $f->name or next; |
125 | my $is_pk = $f->is_primary_key; |
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126 | |
127 | # |
128 | # Decide if we should skip this field. |
129 | # |
130 | if ( $show_fk_only ) { |
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131 | next unless $is_pk || $f->is_foreign_key; |
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132 | } |
133 | |
134 | if ( $is_pk ) { |
135 | $name .= ' *'; |
136 | $legend{'Primary key'} = '*'; |
137 | } |
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138 | elsif ( $f->is_unique ) { |
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139 | $name .= ' [U]'; |
140 | $legend{'Unique constraint'} = '[U]'; |
141 | } |
142 | |
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143 | my $desc = $f->data_type; |
144 | $desc .= '('.$f->size.')' if $f->size; |
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145 | |
146 | my $nlen = length $name; |
147 | $max_name = $nlen if $nlen > $max_name; |
148 | push @fld_desc, [ $name, $desc, $f->{'name'}, $is_pk ]; |
149 | } |
150 | |
151 | $max_name += 4; |
152 | for my $fld_desc ( @fld_desc ) { |
153 | my ( $name, $desc, $orig_name, $is_pk ) = @$fld_desc; |
154 | my $diff = $max_name - length $name; |
155 | $name .= ' ' x $diff; |
156 | $desc = $name . $desc; |
157 | |
158 | push @shapes, [ 'string', $font, $this_col_x, $y, $desc, 'black' ]; |
159 | $y += $font->height + 2; |
160 | my $length = $this_col_x + ( $font->width * length( $desc ) ); |
161 | $this_max_x = $length if $length > $this_max_x; |
162 | |
163 | my $constraints = $table->{'fields'}{ $orig_name }{'constraints'}; |
164 | |
165 | if ( $natural_join && !$skip{ $orig_name } ) { |
166 | push @{ $nj_registry{ $orig_name } }, $table_name; |
167 | } |
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168 | |
169 | my $y_link = $y - $font->height/2; |
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170 | $coords{ $table_name }{ $orig_name }{'coords'} = { |
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171 | left => [ $this_col_x - 6, $y_link ], |
172 | right => [ $length + 2 , $y_link ], |
173 | table => $table_name, |
174 | field_no => ++$field_no, |
175 | is_pk => $is_pk, |
176 | fld_name => $orig_name, |
177 | }; |
178 | } |
179 | |
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180 | unless ( $natural_join ) { |
181 | for my $c ( $table->get_constraints ) { |
182 | next unless $c->type eq FOREIGN_KEY; |
183 | my $fk_table = $c->reference_table or next; |
184 | |
185 | for my $field_name ( $c->fields ) { |
186 | for my $fk_field ( $c->reference_fields ) { |
187 | next unless defined $schema->get_table( $fk_table ); |
188 | push @fk_registry, [ |
189 | [ $table_name, $field_name ], |
190 | [ $fk_table , $fk_field ], |
191 | ]; |
192 | } |
193 | } |
194 | } |
195 | } |
196 | |
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197 | $this_max_x += 5; |
198 | $table_x{ $table_name } = $this_max_x + 5; |
199 | push @shapes, [ 'line', $this_col_x - 5, $below_table_name, |
200 | $this_max_x, $below_table_name, 'black' ]; |
201 | my @bounds = ( $this_col_x - 5, $top - 5, $this_max_x, $y + 5 ); |
202 | if ( $add_color ) { |
203 | unshift @shapes, [ |
204 | 'filledRectangle', |
205 | $bounds[0], $bounds[1], |
206 | $this_max_x, $below_table_name, |
207 | 'khaki' |
208 | ]; |
209 | unshift @shapes, [ 'filledRectangle', @bounds, 'white' ]; |
210 | } |
211 | push @shapes, [ 'rectangle', @bounds, 'black' ]; |
212 | $max_x = $this_max_x if $this_max_x > $max_x; |
213 | $y += 25; |
214 | |
215 | if ( ++$no_this_col == $no_per_col ) {# if we've filled up this column |
216 | $cur_col++; # up the column number |
217 | $no_this_col = 0; # reset the number of tables |
218 | $max_x += $gutter; # push the x over for next column |
219 | $this_col_x = $max_x; # remember the max x for this col |
220 | $max_y = $y if $y > $max_y; # note the max y |
221 | $y = $orig_y; # reset the y for next column |
222 | } |
223 | } |
224 | |
225 | # |
226 | # Connect the lines. |
227 | # |
228 | my %horz_taken; |
229 | my %done; |
230 | unless ( $no_lines ) { |
231 | my @position_bunches; |
232 | |
233 | if ( $natural_join ) { |
234 | for my $field_name ( keys %nj_registry ) { |
235 | my @positions; |
236 | my @table_names = |
237 | @{ $nj_registry{ $field_name } || [] } or next; |
238 | next if scalar @table_names == 1; |
239 | |
240 | for my $table_name ( @table_names ) { |
241 | push @positions, |
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242 | $coords{ $table_name }{ $field_name }{'coords'}; |
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243 | } |
244 | |
245 | push @position_bunches, [ @positions ]; |
246 | } |
247 | } |
248 | else { |
249 | for my $pair ( @fk_registry ) { |
250 | push @position_bunches, [ |
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251 | $coords{$pair->[0][0]}{ $pair->[0][1] }{'coords'}, |
252 | $coords{$pair->[1][0]}{ $pair->[1][1] }{'coords'}, |
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253 | ]; |
254 | } |
255 | } |
256 | |
257 | my $is_directed = $natural_join ? 0 : 1; |
258 | |
259 | for my $bunch ( @position_bunches ) { |
260 | my @positions = @$bunch; |
261 | |
262 | for my $i ( 0 .. $#positions ) { |
263 | my $pos1 = $positions[ $i ]; |
264 | my ( $ax, $ay ) = @{ $pos1->{'left'} || [] } or next; |
265 | my ( $bx, $by ) = @{ $pos1->{'right'} || [] } or next; |
266 | my $table1 = $pos1->{'table'}; |
267 | my $fno1 = $pos1->{'field_no'}; |
268 | my $is_pk = $pos1->{'is_pk'}; |
269 | next if $join_pk_only and !$is_pk; |
270 | |
271 | for my $j ( 0 .. $#positions ) { |
272 | my $pos2 = $positions[ $j ]; |
273 | my ( $cx, $cy ) = @{ $pos2->{'left'} || [] } or next; |
274 | my ( $dx, $dy ) = @{ $pos2->{'right'} || [] } or next; |
275 | my $table2 = $pos2->{'table'}; |
276 | my $fno2 = $pos2->{'field_no'}; |
277 | next if $table1 eq $table2; |
278 | next if $done{ $fno1 }{ $fno2 }; |
279 | next if $fno1 == $fno2; |
280 | |
281 | my @distances = (); |
282 | push @distances, [ |
283 | abs ( $ax - $cx ) + abs ( $ay - $cy ), |
284 | [ $ax, $ay, $cx, $cy ], |
285 | [ 'left', 'left' ] |
286 | ]; |
287 | push @distances, [ |
288 | abs ( $ax - $dx ) + abs ( $ay - $dy ), |
289 | [ $ax, $ay, $dx, $dy ], |
290 | [ 'left', 'right' ], |
291 | ]; |
292 | push @distances, [ |
293 | abs ( $bx - $cx ) + abs ( $by - $cy ), |
294 | [ $bx, $by, $cx, $cy ], |
295 | [ 'right', 'left' ], |
296 | ]; |
297 | push @distances, [ |
298 | abs ( $bx - $dx ) + abs ( $by - $dy ), |
299 | [ $bx, $by, $dx, $dy ], |
300 | [ 'right', 'right' ], |
301 | ]; |
302 | @distances = sort { $a->[0] <=> $b->[0] } @distances; |
303 | my $shortest = $distances[0]; |
304 | my ( $x1, $y1, $x2, $y2 ) = @{ $shortest->[1] }; |
305 | my ( $side1, $side2 ) = @{ $shortest->[2] }; |
306 | my ( $start, $end ); |
307 | my $offset = 9; |
308 | my $col1_right = $table_x{ $table1 }; |
309 | my $col2_right = $table_x{ $table2 }; |
310 | |
311 | my $diff = 0; |
312 | if ( $x1 == $x2 ) { |
313 | while ( $horz_taken{ $x1 + $diff } ) { |
314 | $diff = $side1 eq 'left' ? $diff - 2 : $diff + 2; |
315 | } |
316 | $horz_taken{ $x1 + $diff } = 1; |
317 | } |
318 | |
319 | if ( $side1 eq 'left' ) { |
320 | $start = $x1 - $offset + $diff; |
321 | } |
322 | else { |
323 | $start = $col1_right + $diff; |
324 | } |
325 | |
326 | if ( $side2 eq 'left' ) { |
327 | $end = $x2 - $offset + $diff; |
328 | } |
329 | else { |
330 | $end = $col2_right + $diff; |
331 | } |
332 | |
333 | push @shapes, |
334 | [ 'line', $x1, $y1, $start, $y1, 'cadetblue' ]; |
335 | push @shapes, |
336 | [ 'line', $start, $y1, $end, $y2, 'cadetblue' ]; |
337 | push @shapes, |
338 | [ 'line', $end, $y2, $x2, $y2, 'cadetblue' ]; |
339 | |
340 | if ( $is_directed ) { |
341 | if ( |
342 | $side1 eq 'right' && $side2 eq 'left' |
343 | || |
344 | $side1 eq 'left' && $side2 eq 'left' |
345 | ) { |
346 | push @shapes, [ |
347 | 'line', $x2 - 3, $y2 - 3, $x2, $y2, 'cadetblue' |
348 | ]; |
349 | push @shapes, [ |
350 | 'line', $x2 - 3, $y2 + 3, $x2, $y2, 'cadetblue' |
351 | ]; |
352 | push @shapes, [ |
353 | 'line', $x2 - 3, $y2 - 3, $x2 - 3, $y2 +3, |
354 | 'cadetblue' |
355 | ]; |
356 | } |
357 | else { |
358 | push @shapes, [ |
359 | 'line', $x2 + 3, $y2 - 3, $x2, $y2, 'cadetblue' |
360 | ]; |
361 | push @shapes, [ |
362 | 'line', $x2 + 3, $y2 + 3, $x2, $y2, 'cadetblue' |
363 | ]; |
364 | push @shapes, [ |
365 | 'line', $x2 + 3, $y2 - 3, $x2 + 3, $y2 +3, |
366 | 'cadetblue' |
367 | ]; |
368 | } |
369 | } |
370 | |
371 | $done{ $fno1 }{ $fno2 } = 1; |
372 | $done{ $fno2 }{ $fno1 } = 1; |
373 | } |
374 | } |
375 | } |
376 | } |
377 | |
378 | # |
379 | # Add the title, legend and signature. |
380 | # |
381 | my $large_font = gdLargeFont; |
382 | my $title_len = $large_font->width * length $title; |
383 | push @shapes, [ |
384 | 'string', $large_font, $max_x/2 - $title_len/2, 10, $title, 'black' |
385 | ]; |
386 | |
387 | if ( %legend ) { |
388 | $max_y += 5; |
389 | push @shapes, [ |
390 | 'string', $font, $x, $max_y - $font->height - 4, 'Legend', 'black' |
391 | ]; |
392 | $max_y += $font->height + 4; |
393 | |
394 | my $longest; |
395 | for my $len ( map { length $_ } values %legend ) { |
396 | $longest = $len if $len > $longest; |
397 | } |
398 | $longest += 2; |
399 | |
400 | while ( my ( $key, $shape ) = each %legend ) { |
401 | my $space = $longest - length $shape; |
402 | push @shapes, [ |
403 | 'string', $font, $x, $max_y - $font->height - 4, |
404 | join( '', $shape, ' ' x $space, $key ), 'black' |
405 | ]; |
406 | |
407 | $max_y += $font->height + 4; |
408 | } |
409 | } |
410 | |
411 | my $sig = __PACKAGE__." $VERSION"; |
412 | my $sig_len = $font->width * length $sig; |
413 | push @shapes, [ |
414 | 'string', $font, $max_x - $sig_len, $max_y - $font->height - 4, |
415 | $sig, 'black' |
416 | ]; |
417 | |
418 | # |
419 | # Render the image. |
420 | # |
421 | my $gd = GD::Image->new( $max_x + 30, $max_y ); |
422 | unless ( $gd->can( $image_type ) ) { |
423 | die "GD can't create images of type '$image_type'\n"; |
424 | } |
425 | my %colors = map { $_->[0], $gd->colorAllocate( @{$_->[1]} ) } ( |
426 | [ white => [ 255, 255, 255 ] ], |
427 | [ beige => [ 245, 245, 220 ] ], |
428 | [ black => [ 0, 0, 0 ] ], |
429 | [ lightblue => [ 173, 216, 230 ] ], |
430 | [ cadetblue => [ 95, 158, 160 ] ], |
431 | [ lightgoldenrodyellow => [ 250, 250, 210 ] ], |
432 | [ khaki => [ 240, 230, 140 ] ], |
433 | [ red => [ 255, 0, 0 ] ], |
434 | ); |
435 | $gd->interlaced( 'true' ); |
436 | my $background_color = $add_color ? 'lightgoldenrodyellow' : 'white'; |
437 | $gd->fill( 0, 0, $colors{ $background_color } ); |
438 | for my $shape ( @shapes ) { |
439 | my $method = shift @$shape; |
440 | my $color = pop @$shape; |
441 | $gd->$method( @$shape, $colors{ $color } ); |
442 | } |
443 | |
444 | # |
445 | # Print the image. |
446 | # |
447 | if ( $out_file ) { |
448 | open my $fh, ">$out_file" or die "Can't write '$out_file': $!\n"; |
449 | print $fh $gd->$image_type; |
450 | close $fh; |
451 | } |
452 | else { |
550022e5 |
453 | return $gd->$image_type; |
37503827 |
454 | } |
455 | } |
456 | |
457 | 1; |
458 | |
459 | =pod |
460 | |
461 | =head1 NAME |
462 | |
463 | SQL::Translator::Producer::Diagram - ER diagram producer for SQL::Translator |
464 | |
465 | =head1 AUTHOR |
466 | |
467 | Ken Y. Clark E<lt>kclark@cpan.orgE<gt> |
468 | |
469 | =cut |