Commit | Line | Data |
456a815d |
1 | package HTML::Zoom::FilterBuilder; |
2 | |
1cf03540 |
3 | use strictures 1; |
d80786d0 |
4 | use base qw(HTML::Zoom::SubObject); |
456a815d |
5 | use HTML::Zoom::CodeStream; |
6 | |
456a815d |
7 | sub _stream_from_code { |
d80786d0 |
8 | shift->_zconfig->stream_utils->stream_from_code(@_) |
456a815d |
9 | } |
10 | |
11 | sub _stream_from_array { |
d80786d0 |
12 | shift->_zconfig->stream_utils->stream_from_array(@_) |
456a815d |
13 | } |
14 | |
3cdbc13f |
15 | sub _stream_from_proto { |
d80786d0 |
16 | shift->_zconfig->stream_utils->stream_from_proto(@_) |
3cdbc13f |
17 | } |
18 | |
456a815d |
19 | sub _stream_concat { |
d80786d0 |
20 | shift->_zconfig->stream_utils->stream_concat(@_) |
456a815d |
21 | } |
22 | |
6d0f20a6 |
23 | sub _flatten_stream_of_streams { |
24 | shift->_zconfig->stream_utils->flatten_stream_of_streams(@_) |
25 | } |
26 | |
456a815d |
27 | sub set_attribute { |
1c4455ae |
28 | my $self = shift; |
29 | my ($name, $value) = $self->_parse_attribute_args(@_); |
456a815d |
30 | sub { |
8f962884 |
31 | my $a = (my $evt = $_[0])->{attrs}; |
456a815d |
32 | my $e = exists $a->{$name}; |
33 | +{ %$evt, raw => undef, raw_attrs => undef, |
34 | attrs => { %$a, $name => $value }, |
35 | ($e # add to name list if not present |
36 | ? () |
37 | : (attr_names => [ @{$evt->{attr_names}}, $name ])) |
38 | } |
39 | }; |
40 | } |
41 | |
1c4455ae |
42 | sub _parse_attribute_args { |
43 | my $self = shift; |
2daa653a |
44 | # allow ->add_to_attribute(name => 'value') |
45 | # or ->add_to_attribute({ name => 'name', value => 'value' }) |
1c4455ae |
46 | my ($name, $value) = @_ > 1 ? @_ : @{$_[0]}{qw(name value)}; |
47 | return ($name, $self->_zconfig->parser->html_escape($value)); |
48 | } |
49 | |
456a815d |
50 | sub add_attribute { |
2daa653a |
51 | die "renamed to add_to_attribute. killing this entirely for 1.0"; |
52 | } |
53 | |
54 | sub add_to_attribute { |
1c4455ae |
55 | my $self = shift; |
56 | my ($name, $value) = $self->_parse_attribute_args(@_); |
456a815d |
57 | sub { |
8f962884 |
58 | my $a = (my $evt = $_[0])->{attrs}; |
456a815d |
59 | my $e = exists $a->{$name}; |
60 | +{ %$evt, raw => undef, raw_attrs => undef, |
61 | attrs => { |
62 | %$a, |
63 | $name => join(' ', ($e ? $a->{$name} : ()), $value) |
64 | }, |
65 | ($e # add to name list if not present |
66 | ? () |
67 | : (attr_names => [ @{$evt->{attr_names}}, $name ])) |
68 | } |
69 | }; |
70 | } |
71 | |
72 | sub remove_attribute { |
73 | my ($self, $args) = @_; |
1c4455ae |
74 | my $name = (ref($args) eq 'HASH') ? $args->{name} : $args; |
456a815d |
75 | sub { |
8f962884 |
76 | my $a = (my $evt = $_[0])->{attrs}; |
456a815d |
77 | return $evt unless exists $a->{$name}; |
78 | $a = { %$a }; delete $a->{$name}; |
79 | +{ %$evt, raw => undef, raw_attrs => undef, |
80 | attrs => $a, |
81 | attr_names => [ grep $_ ne $name, @{$evt->{attr_names}} ] |
82 | } |
83 | }; |
84 | } |
85 | |
5cac799e |
86 | sub transform_attribute { |
87 | my $self = shift; |
88 | my ( $name, $code ) = @_ > 1 ? @_ : @{$_[0]}{qw(name code)}; |
89 | |
90 | sub { |
91 | my $evt = $_[0]; |
92 | my %a = %{ $evt->{attrs} }; |
93 | my @names = @{ $evt->{attr_names} }; |
94 | |
95 | my $existed_before = exists $a{$name}; |
96 | my $v = $code->( $a{$name} ); |
97 | my $deleted = $existed_before && ! defined $v; |
98 | my $added = ! $existed_before && defined $v; |
99 | if( $added ) { |
100 | push @names, $name; |
101 | $a{$name} = $v; |
102 | } |
103 | elsif( $deleted ) { |
104 | delete $a{$name}; |
105 | @names = grep $_ ne $name, @names; |
106 | } else { |
107 | $a{$name} = $v; |
108 | } |
109 | +{ %$evt, raw => undef, raw_attrs => undef, |
110 | attrs => \%a, |
111 | ( $deleted || $added |
112 | ? (attr_names => \@names ) |
113 | : () ) |
114 | } |
115 | }; |
116 | } |
117 | |
76cecb10 |
118 | sub collect { |
119 | my ($self, $options) = @_; |
1c4455ae |
120 | my ($into, $passthrough, $content, $filter, $flush_before) = |
121 | @{$options}{qw(into passthrough content filter flush_before)}; |
76cecb10 |
122 | sub { |
123 | my ($evt, $stream) = @_; |
b4d044eb |
124 | # We wipe the contents of @$into here so that other actions depending |
125 | # on this (such as a repeater) can be invoked multiple times easily. |
126 | # I -suspect- it's better for that state reset to be managed here; if it |
127 | # ever becomes painful the decision should be revisited |
128 | if ($into) { |
865bb5d2 |
129 | @$into = $content ? () : ($evt); |
b4d044eb |
130 | } |
76cecb10 |
131 | if ($evt->{is_in_place_close}) { |
865bb5d2 |
132 | return $evt if $passthrough || $content; |
76cecb10 |
133 | return; |
134 | } |
135 | my $name = $evt->{name}; |
136 | my $depth = 1; |
865bb5d2 |
137 | my $_next = $content ? 'peek' : 'next'; |
2abde91e |
138 | if ($filter) { |
139 | if ($content) { |
140 | $stream = do { local $_ = $stream; $filter->($stream) }; |
141 | } else { |
142 | $stream = do { |
143 | local $_ = $self->_stream_concat( |
144 | $self->_stream_from_array($evt), |
145 | $stream, |
146 | ); |
147 | $filter->($_); |
148 | }; |
149 | $evt = $stream->next; |
150 | } |
151 | } |
76cecb10 |
152 | my $collector = $self->_stream_from_code(sub { |
153 | return unless $stream; |
154 | while (my ($evt) = $stream->$_next) { |
155 | $depth++ if ($evt->{type} eq 'OPEN'); |
156 | $depth-- if ($evt->{type} eq 'CLOSE'); |
157 | unless ($depth) { |
158 | undef $stream; |
865bb5d2 |
159 | return if $content; |
76cecb10 |
160 | push(@$into, $evt) if $into; |
161 | return $evt if $passthrough; |
162 | return; |
163 | } |
164 | push(@$into, $evt) if $into; |
865bb5d2 |
165 | $stream->next if $content; |
76cecb10 |
166 | return $evt if $passthrough; |
167 | } |
168 | die "Never saw closing </${name}> before end of source"; |
169 | }); |
1c4455ae |
170 | if ($flush_before) { |
171 | if ($passthrough||$content) { |
172 | $evt = { %$evt, flush => 1 }; |
173 | } else { |
174 | $evt = { type => 'EMPTY', flush => 1 }; |
175 | } |
176 | } |
177 | return ($passthrough||$content||$flush_before) |
178 | ? [ $evt, $collector ] |
179 | : $collector; |
76cecb10 |
180 | }; |
181 | } |
182 | |
865bb5d2 |
183 | sub collect_content { |
184 | my ($self, $options) = @_; |
185 | $self->collect({ %{$options||{}}, content => 1 }) |
186 | } |
187 | |
456a815d |
188 | sub add_before { |
189 | my ($self, $events) = @_; |
8f962884 |
190 | sub { return $self->_stream_from_array(@$events, $_[0]) }; |
456a815d |
191 | } |
192 | |
193 | sub add_after { |
194 | my ($self, $events) = @_; |
b616863d |
195 | my $coll_proto = $self->collect({ passthrough => 1 }); |
456a815d |
196 | sub { |
8f962884 |
197 | my ($evt) = @_; |
456a815d |
198 | my $emit = $self->_stream_from_array(@$events); |
b616863d |
199 | my $coll = &$coll_proto; |
995bc8be |
200 | return ref($coll) eq 'HASH' # single event, no collect |
201 | ? [ $coll, $emit ] |
202 | : [ $coll->[0], $self->_stream_concat($coll->[1], $emit) ]; |
456a815d |
203 | }; |
8f962884 |
204 | } |
456a815d |
205 | |
865bb5d2 |
206 | sub prepend_content { |
456a815d |
207 | my ($self, $events) = @_; |
208 | sub { |
8f962884 |
209 | my ($evt) = @_; |
456a815d |
210 | if ($evt->{is_in_place_close}) { |
211 | $evt = { %$evt }; delete @{$evt}{qw(raw is_in_place_close)}; |
212 | return [ $evt, $self->_stream_from_array( |
213 | @$events, { type => 'CLOSE', name => $evt->{name} } |
214 | ) ]; |
215 | } |
216 | return $self->_stream_from_array($evt, @$events); |
217 | }; |
218 | } |
219 | |
865bb5d2 |
220 | sub append_content { |
8f962884 |
221 | my ($self, $events) = @_; |
865bb5d2 |
222 | my $coll_proto = $self->collect({ passthrough => 1, content => 1 }); |
8f962884 |
223 | sub { |
224 | my ($evt) = @_; |
225 | if ($evt->{is_in_place_close}) { |
226 | $evt = { %$evt }; delete @{$evt}{qw(raw is_in_place_close)}; |
227 | return [ $evt, $self->_stream_from_array( |
228 | @$events, { type => 'CLOSE', name => $evt->{name} } |
229 | ) ]; |
230 | } |
b616863d |
231 | my $coll = &$coll_proto; |
8f962884 |
232 | my $emit = $self->_stream_from_array(@$events); |
233 | return [ $coll->[0], $self->_stream_concat($coll->[1], $emit) ]; |
234 | }; |
235 | } |
236 | |
456a815d |
237 | sub replace { |
3cdbc13f |
238 | my ($self, $replace_with, $options) = @_; |
b616863d |
239 | my $coll_proto = $self->collect($options); |
456a815d |
240 | sub { |
241 | my ($evt, $stream) = @_; |
3cdbc13f |
242 | my $emit = $self->_stream_from_proto($replace_with); |
b616863d |
243 | my $coll = &$coll_proto; |
a88c1c57 |
244 | # if we're replacing the contents of an in place close |
245 | # then we need to handle that here |
246 | if ($options->{content} |
247 | && ref($coll) eq 'HASH' |
ec687101 |
248 | && $coll->{is_in_place_close} |
a88c1c57 |
249 | ) { |
a88c1c57 |
250 | my $close = $stream->next; |
ec687101 |
251 | # shallow copy and nuke in place and raw (to force smart print) |
252 | $_ = { %$_ }, delete @{$_}{qw(is_in_place_close raw)} for ($coll, $close); |
a88c1c57 |
253 | $emit = $self->_stream_concat( |
254 | $emit, |
255 | $self->_stream_from_array($close), |
256 | ); |
257 | } |
451b3b30 |
258 | # For a straightforward replace operation we can, in fact, do the emit |
259 | # -before- the collect, and my first cut did so. However in order to |
260 | # use the captured content in generating the new content, we need |
261 | # the collect stage to happen first - and it seems highly unlikely |
262 | # that in normal operation the collect phase will take long enough |
263 | # for the difference to be noticeable |
11cc25dd |
264 | return |
265 | ($coll |
a88c1c57 |
266 | ? (ref $coll eq 'ARRAY' # [ event, stream ] |
451b3b30 |
267 | ? [ $coll->[0], $self->_stream_concat($coll->[1], $emit) ] |
a88c1c57 |
268 | : (ref $coll eq 'HASH' # event or stream? |
269 | ? [ $coll, $emit ] |
270 | : $self->_stream_concat($coll, $emit)) |
11cc25dd |
271 | ) |
272 | : $emit |
273 | ); |
456a815d |
274 | }; |
275 | } |
276 | |
865bb5d2 |
277 | sub replace_content { |
278 | my ($self, $replace_with, $options) = @_; |
279 | $self->replace($replace_with, { %{$options||{}}, content => 1 }) |
280 | } |
281 | |
3cdbc13f |
282 | sub repeat { |
283 | my ($self, $repeat_for, $options) = @_; |
284 | $options->{into} = \my @into; |
f8ed299b |
285 | my @between; |
286 | my $repeat_between = delete $options->{repeat_between}; |
287 | if ($repeat_between) { |
f8ed299b |
288 | $options->{filter} = sub { |
d80786d0 |
289 | $_->select($repeat_between)->collect({ into => \@between }) |
f8ed299b |
290 | }; |
291 | } |
3cdbc13f |
292 | my $repeater = sub { |
f8ed299b |
293 | my $s = $self->_stream_from_proto($repeat_for); |
294 | # We have to test $repeat_between not @between here because |
295 | # at the point we're constructing our return stream @between |
296 | # hasn't been populated yet - but we can test @between in the |
297 | # map routine because it has been by then and that saves us doing |
298 | # the extra stream construction if we don't need it. |
6d0f20a6 |
299 | $self->_flatten_stream_of_streams(do { |
300 | if ($repeat_between) { |
301 | $s->map(sub { |
302 | local $_ = $self->_stream_from_array(@into); |
303 | (@between && $s->peek) |
304 | ? $self->_stream_concat( |
305 | $_[0]->($_), $self->_stream_from_array(@between) |
306 | ) |
307 | : $_[0]->($_) |
308 | }) |
309 | } else { |
310 | $s->map(sub { |
311 | local $_ = $self->_stream_from_array(@into); |
312 | $_[0]->($_) |
f8ed299b |
313 | }) |
6d0f20a6 |
314 | } |
315 | }) |
3cdbc13f |
316 | }; |
317 | $self->replace($repeater, $options); |
318 | } |
319 | |
865bb5d2 |
320 | sub repeat_content { |
321 | my ($self, $repeat_for, $options) = @_; |
322 | $self->repeat($repeat_for, { %{$options||{}}, content => 1 }) |
323 | } |
324 | |
456a815d |
325 | 1; |
556c8616 |
326 | |
327 | =head1 NAME |
328 | |
329 | HTML::Zoom::FilterBuilder - Add Filters to a Stream |
330 | |
244252e7 |
331 | =head1 SYNOPSIS |
332 | |
a42917f6 |
333 | Create an L<HTML::Zoom> instance: |
334 | |
0d8f057e |
335 | use HTML::Zoom; |
336 | my $root = HTML::Zoom |
337 | ->from_html(<<MAIN); |
338 | <html> |
339 | <head> |
340 | <title>Default Title</title> |
341 | </head> |
a42917f6 |
342 | <body bad_attr='junk'> |
0d8f057e |
343 | Default Content |
344 | </body> |
345 | </html> |
346 | MAIN |
347 | |
a42917f6 |
348 | Create a new attribute on the C<body> tag: |
349 | |
350 | $root = $root |
351 | ->select('body') |
352 | ->set_attribute(class=>'main'); |
353 | |
354 | Add a extra value to an existing attribute: |
355 | |
356 | $root = $root |
357 | ->select('body') |
358 | ->add_to_attribute(class=>'one-column'); |
359 | |
360 | Set the content of the C<title> tag: |
361 | |
362 | $root = $root |
363 | ->select('title') |
364 | ->replace_content('Hello World'); |
365 | |
366 | Set content from another L<HTML::Zoom> instance: |
367 | |
0d8f057e |
368 | my $body = HTML::Zoom |
369 | ->from_html(<<BODY); |
370 | <div id="stuff"> |
2daa653a |
371 | <p>Well Now</p> |
f8ad684d |
372 | <p id="p2">Is the Time</p> |
0d8f057e |
373 | </div> |
374 | BODY |
375 | |
a42917f6 |
376 | $root = $root |
f8ad684d |
377 | ->select('body') |
a42917f6 |
378 | ->replace_content($body); |
379 | |
380 | Set an attribute on multiple matches: |
381 | |
382 | $root = $root |
f8ad684d |
383 | ->select('p') |
a42917f6 |
384 | ->set_attribute(class=>'para'); |
385 | |
386 | Remove an attribute: |
387 | |
388 | $root = $root |
389 | ->select('body') |
390 | ->remove_attribute('bad_attr'); |
0d8f057e |
391 | |
392 | will produce: |
393 | |
394 | =begin testinfo |
395 | |
a42917f6 |
396 | my $output = $root->to_html; |
0d8f057e |
397 | my $expect = <<HTML; |
398 | |
399 | =end testinfo |
400 | |
401 | <html> |
402 | <head> |
403 | <title>Hello World</title> |
404 | </head> |
434a11c8 |
405 | <body class="main one-column"><div id="stuff"> |
adb30a8a |
406 | <p class="para">Well Now</p> |
a42917f6 |
407 | <p id="p2" class="para">Is the Time</p> |
0d8f057e |
408 | </div> |
409 | </body> |
410 | </html> |
411 | |
412 | =begin testinfo |
413 | |
414 | HTML |
415 | is($output, $expect, 'Synopsis code works ok'); |
416 | |
417 | =end testinfo |
244252e7 |
418 | |
556c8616 |
419 | =head1 DESCRIPTION |
420 | |
421 | Given a L<HTML::Zoom> stream, provide methods to apply filters which |
422 | alter the content of that stream. |
423 | |
f6644c71 |
424 | =head1 METHODS |
425 | |
426 | This class defines the following public API |
427 | |
e225a4bd |
428 | =head2 set_attribute |
f6644c71 |
429 | |
f8ad684d |
430 | Sets an attribute of a given name to a given value for all matching selections. |
431 | |
432 | $html_zoom |
433 | ->select('p') |
434 | ->set_attribute(class=>'paragraph') |
435 | ->select('div') |
434a11c8 |
436 | ->set_attribute(name=>'class', value=>'divider'); |
437 | |
f8ad684d |
438 | |
439 | Overrides existing values, if such exist. When multiple L</set_attribute> |
440 | calls are made against the same or overlapping selection sets, the final |
441 | call wins. |
f6644c71 |
442 | |
e225a4bd |
443 | =head2 add_to_attribute |
f6644c71 |
444 | |
434a11c8 |
445 | Adds a value to an existing attribute, or creates one if the attribute does not |
446 | yet exist. |
f6644c71 |
447 | |
434a11c8 |
448 | $html_zoom |
449 | ->select('p') |
450 | ->set_attribute(class=>'paragraph') |
451 | ->then |
452 | ->add_to_attribute(name=>'class', value=>'divider'); |
f6644c71 |
453 | |
434a11c8 |
454 | Attributes with more than one value will have a dividing space. |
455 | |
e225a4bd |
456 | =head2 remove_attribute |
434a11c8 |
457 | |
458 | Removes an attribute and all its values. |
459 | |
460 | $html_zoom |
461 | ->select('p') |
462 | ->set_attribute(class=>'paragraph') |
463 | ->then |
464 | ->remove_attribute('class'); |
465 | |
466 | Removes attributes from the original stream or events already added. |
f6644c71 |
467 | |
5cac799e |
468 | =head2 transform_attribute |
469 | |
470 | Transforms (or creates or deletes) an attribute by running the passed |
471 | coderef on it. If the coderef returns nothing, the attribute is |
472 | removed. |
473 | |
474 | $html_zoom |
475 | ->select('a') |
476 | ->transform_attribute( href => sub { |
477 | ( my $a = shift ) =~ s/localhost/example.com/; |
478 | return $a; |
479 | }, |
480 | ); |
481 | |
f6644c71 |
482 | =head2 collect |
483 | |
ac3acd87 |
484 | Collects and extracts results of L<HTML::Zoom/select>. It takes the following |
485 | optional common options as hash reference. |
486 | |
487 | =over |
488 | |
489 | =item into [ARRAY REFERENCE] |
490 | |
491 | Where to save collected events (selected elements). |
492 | |
493 | $z1->select('#main-content') |
494 | ->collect({ into => \@body }) |
495 | ->run; |
496 | $z2->select('#main-content') |
497 | ->replace(\@body) |
498 | ->memoize; |
499 | |
500 | =item filter [CODE] |
501 | |
502 | Run filter on collected elements (locally setting $_ to stream, and passing |
503 | stream as an argument to given code reference). Filtered stream would be |
504 | returned. |
505 | |
506 | $z->select('.outer') |
507 | ->collect({ |
508 | filter => sub { $_->select('.inner')->replace_content('bar!') }, |
509 | passthrough => 1, |
510 | }) |
511 | |
512 | It can be used to further filter selection. For example |
513 | |
514 | $z->select('tr') |
515 | ->collect({ |
516 | filter => sub { $_->select('td') }, |
517 | passthrough => 1, |
518 | }) |
519 | |
520 | is equivalent to (not implemented yet) descendant selector combination, i.e. |
521 | |
522 | $z->select('tr td') |
523 | |
524 | =item passthrough [BOOLEAN] |
525 | |
526 | Extract copy of elements; the stream is unchanged (it does not remove collected |
527 | elements). For example without 'passthrough' |
528 | |
529 | HTML::Zoom->from_html('<foo><bar /></foo>') |
530 | ->select('foo') |
531 | ->collect({ content => 1 }) |
532 | ->to_html |
533 | |
534 | returns '<foo></foo>', while with C<passthrough> option |
535 | |
536 | HTML::Zoom->from_html('<foo><bar /></foo>') |
537 | ->select('foo') |
538 | ->collect({ content => 1, passthough => 1 }) |
539 | ->to_html |
540 | |
541 | returns '<foo><bar /></foo>'. |
542 | |
543 | =item content [BOOLEAN] |
544 | |
545 | Collect content of the element, and not the element itself. |
546 | |
547 | For example |
548 | |
549 | HTML::Zoom->from_html('<h1>Title</h1><p>foo</p>') |
550 | ->select('h1') |
551 | ->collect |
552 | ->to_html |
553 | |
554 | would return '<p>foo</p>', while |
555 | |
556 | HTML::Zoom->from_html('<h1>Title</h1><p>foo</p>') |
557 | ->select('h1') |
558 | ->collect({ content => 1 }) |
559 | ->to_html |
560 | |
561 | would return '<h1></h1><p>foo</p>'. |
562 | |
563 | See also L</collect_content>. |
564 | |
565 | =item flush_before [BOOLEAN] |
566 | |
567 | Generate C<flush> event before collecting, to ensure that the HTML generated up |
568 | to selected element being collected is flushed throught to the browser. Usually |
569 | used in L</repeat> or L</repeat_content>. |
570 | |
571 | =back |
f6644c71 |
572 | |
573 | =head2 collect_content |
574 | |
ac3acd87 |
575 | Collects contents of L<HTML::Zoom/select> result. |
576 | |
577 | HTML::Zoom->from_file($foo) |
578 | ->select('#main-content') |
579 | ->collect_content({ into => \@foo_body }) |
580 | ->run; |
581 | $z->select('#foo') |
582 | ->replace_content(\@foo_body) |
583 | ->memoize; |
584 | |
585 | Equivalent to running L</collect> with C<content> option set. |
f6644c71 |
586 | |
587 | =head2 add_before |
588 | |
ac3acd87 |
589 | Given a L<HTML::Zoom/select> result, add given content (which might be string, |
590 | array or another L<HTML::Zoom> object) before it. |
591 | |
592 | $html_zoom |
593 | ->select('input[name="foo"]') |
594 | ->add_before(\ '<span class="warning">required field</span>'); |
f6644c71 |
595 | |
596 | =head2 add_after |
597 | |
ac3acd87 |
598 | Like L</add_before>, only after L<HTML::Zoom/select> result. |
599 | |
600 | $html_zoom |
601 | ->select('p') |
602 | ->add_after("\n\n"); |
603 | |
604 | You can add zoom events directly |
605 | |
606 | $html_zoom |
607 | ->select('p') |
608 | ->add_after([ { type => 'TEXT', raw => 'O HAI' } ]); |
f6644c71 |
609 | |
610 | =head2 prepend_content |
611 | |
612 | TBD |
613 | |
614 | =head2 append_content |
615 | |
616 | TBD |
617 | |
618 | =head2 replace |
619 | |
ac3acd87 |
620 | Given a L<HTML::Zoom/select> result, replace it with a string, array or another |
621 | L<HTML::Zoom> object. It takes the same optional common options as L</collect> |
622 | (via hash reference). |
f6644c71 |
623 | |
624 | =head2 replace_content |
625 | |
244252e7 |
626 | Given a L<HTML::Zoom/select> result, replace the content with a string, array |
627 | or another L<HTML::Zoom> object. |
f6644c71 |
628 | |
ac3acd87 |
629 | $html_zoom |
630 | ->select('title, #greeting') |
631 | ->replace_content('Hello world!'); |
632 | |
f6644c71 |
633 | =head2 repeat |
634 | |
ac3acd87 |
635 | $zoom->select('.item')->repeat(sub { |
636 | if (my $row = $db_thing->next) { |
637 | return sub { $_->select('.item-name')->replace_content($row->name) } |
638 | } else { |
639 | return |
640 | } |
641 | }, { flush_before => 1 }); |
642 | |
643 | Run I<$repeat_for>, which should be iterator (code reference) returning |
644 | subroutines, reference to array of subroutines, or other zoom-able object |
645 | consisting of transformations. Those subroutines would be run with $_ |
646 | local-ized to result of L<HTML::Zoom/select> (of collected elements), and with |
647 | said result passed as parameter to subroutine. |
648 | |
649 | You might want to use iterator when you don't have all elements upfront |
650 | |
651 | $zoom = $zoom->select('.contents')->repeat(sub { |
652 | while (my $line = $fh->getline) { |
653 | return sub { |
654 | $_->select('.lno')->replace_content($fh->input_line_number) |
655 | ->select('.line')->replace_content($line) |
656 | } |
657 | } |
658 | return |
659 | }); |
660 | |
661 | You might want to use array reference if it doesn't matter that all iterations |
662 | are pre-generated |
663 | |
664 | $zoom->select('table')->repeat([ |
665 | map { |
666 | my $elem = $_; |
667 | sub { |
668 | $_->select('td')->replace_content($e); |
669 | } |
670 | } @list |
671 | ]); |
672 | |
673 | In addition to common options as in L</collect>, it also supports |
674 | |
675 | =over |
676 | |
677 | =item repeat_between [SELECTOR] |
678 | |
679 | Selects object to be repeated between items. In the case of array this object |
680 | is put between elements, in case of iterator it is put between results of |
681 | subsequent iterations, in the case of streamable it is put between events |
682 | (->to_stream->next). |
683 | |
684 | See documentation for L</repeat_content> |
685 | |
686 | =back |
f6644c71 |
687 | |
688 | =head2 repeat_content |
689 | |
ac3acd87 |
690 | Given a L<HTML::Zoom/select> result, run provided iterator passing content of |
691 | this result to this iterator. Accepts the same options as L</repeat>. |
692 | |
693 | Equivalent to using C<contents> option with L</repeat>. |
694 | |
695 | $html_zoom |
696 | ->select('#list') |
697 | ->repeat_content( |
698 | [ |
699 | sub { |
700 | $_->select('.name')->replace_content('Matt') |
701 | ->select('.age')->replace_content('26') |
702 | }, |
703 | sub { |
704 | $_->select('.name')->replace_content('Mark') |
705 | ->select('.age')->replace_content('0x29') |
706 | }, |
707 | sub { |
708 | $_->select('.name')->replace_content('Epitaph') |
709 | ->select('.age')->replace_content('<redacted>') |
710 | }, |
711 | ], |
712 | { repeat_between => '.between' } |
713 | ); |
714 | |
f6644c71 |
715 | |
556c8616 |
716 | =head1 ALSO SEE |
717 | |
718 | L<HTML::Zoom> |
719 | |
720 | =head1 AUTHORS |
721 | |
722 | See L<HTML::Zoom> for authors. |
723 | |
724 | =head1 LICENSE |
725 | |
726 | See L<HTML::Zoom> for the license. |
727 | |
728 | =cut |
729 | |