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2002-07-30 Sean M. Burke
Release 3.12
Added as_trimmed_text method to HTML::Element, as described
(prophesied?) in the fantabulous new book /Perl & LWP/.
Bugfix: fixed unshift_content when given a LoL. (_parent wasn't
getting set right.)
HTML::Element and HTML::TreeBuilder now enforce at least some
minimal sanity on what can be in a tag name. (Notably, no spaces,
slashes, or control characters.)
Semi-bugfix: $element->replace_with(...) can now take LoLs in its
replacement list.
Bumped HTML::Element version up to 3.12 (right from 3.09)
Semi-bugfix: as_XML now doesn't use named entities in its return
value -- it always uses numeric entities.
Added behavior: new_frow_lol can now do clever things in list
context.
HTML::Tree -- added blurb for /Perl & LWP/
HTML::TreeBuilder -- added blurb for /Perl & LWP/
Also added a few tweaks to do better with XHTML parsing.
Added guts() and disembowel() methods, for parsing document fragments.
TODO: desperately need to add tests to t/
2001-03-14 Sean M. Burke
Release 3.11
Bugfix: Klaus-Georg Adams reported that
the topmost frameset element in an HTML::TreeBuilder tree wasn't
getting its _parent attribute set. Fixed.
Minor bugfix: the root element of a new HTML::TreeBuilder tree was
missing its initial "_implicit" attribute. Fixed.
Two handy new methods in HTML::TreeBuilder:
* HTML::TreeBuilder->new_from_content(...)
* HTML::TreeBuilder->new_from_file($filename)
a.k.a.: HTML::TreeBuilder->new_from_file($fh)
2001-03-10 Sean M. Burke
Release 3.10
Now bundling three relevent The Perl Journal articles by me:
HTML::Tree::AboutObjects, HTML::Tree::AboutTrees, and
HTML::Tree::Scanning.
Vadims_Beilins@swh-t.lv observes that $h->push_content(LoL)
doesn't take care of _parent bookkeeping right. FIXED.
John Woffindin notes a similar bug in clone();
FIXED.
Adding no_space_compacting feature to TreeBuilder, at suggestion of
Victor Wagner .
Incorporating the clever suggestion (from Martin H. Sluka,
) that $element->extract_links's returned LoL
should contain a third item (for the attribute name) in the
per-link listref. I also add a fourth item, the tagname of the
element.
New method, "elementify", in HTML::TreeBuilder.
Various improvements and clarifications to the POD in
HTML::TreeBuilder and HTML::Element.
Some new methods in HTML::Element: "number_lists",
"objectify_text", and "deobjectify_text".
HTML::Element and HTML::TreeBuilder versions both bumped up from
3.08 to 3.10, to keep pace with the HTML::Tree version.
2001-01-21 Sean M. Burke
Release 3.09
Changed HTML/Element/traverse.pod to HTML/Element/traverse.pm
Wrote overview file: HTML/Tree.pm
2000-11-03 Sean M. Burke
Release 3.08
In Element and TreeBuilder: fixed handling of textarea content --
Thanks to Ronald J Kimball for
catching this.
In Element: a few internal changes to make it subclassable by the
forthcoming XML::Element et al.
2000-10-20 Sean M. Burke
Release 3.07
In Element: made new_from_lol accept existing HTML::Element objects
as part of the loltree. Thanks for Bob Glickstein
for the suggestion.
In Element: feeding an arrayref to push_content, unshift_content,
or splice_content now implicitly calls new_from_lol.
In Element: reversed the change in as_HTML/XML/Lisp_form that would
skip dumping attributes with references for values. It reacted
undesirably with objects that overload stringify; to wit, URI.pm
objects.
2000-10-15 Sean M. Burke
Release 3.06
In Element: methods added: $x->id, $x->idf, $x->as_XML,
$x->as_Lisp_form
In Element: internal optimization: as_HTML no longer uses the
tag() accessor. Should cause no change in behavior.
In Element: as_HTML (via starttag) no longer tries to dump
attributes whose values are references, or whose names
are null-string or "/". This should cause no change in
behavior, as there's no normal way for any document to parse
to a tree containing any such attributes.
In Element: minor rewordings or typo-fixes in the POD.
2000-10-02 Sean M. Burke
Release 3.05
In Element: fixed typo in docs for the content_refs_list method.
Had:
foreach my $item ($h->content_array_ref) {
Corrected to:
foreach my $item (@{ $h->content_array_ref }) {
In Element: fixed bug in $h->left that made it useless in scalar
context. Thanks to Toby Thurston for
spotting this.
In Element: added new method $h->tagname_map
In TreeBuilder: Some minor corrections to the logic of handling TD
and TH elements -- basically bug fixes, in response to an astute
bug report from Toby Thurston .
In TreeBuilder: Fixed lame bug that made strict-p mode nearly
useless. It may now approach usability!
This dist contains a simple utility called "htmltree" that parses
given HTML documents, and dumps their parse tree. (It's not
actually new in this version, but was never mentioned before.)
In TreeBuilder, a change of interest only to advanced programmers
familiar with TreeBuilder's source and perpetually undocumented
features: there is no $HTML::TreeBuilder::Debug anymore.
If you want to throw TreeBuilder into Debug mode, you have to do it
at compile time -- by having a line like this BEFORE any line that
says "use HTML::TreeBuilder":
sub HTML::TreeBuilder::DEBUG () {3};
where "5" is whatever debug level (0 for no debug output) that you
want TreeBuilder to be in. All the in TreeBuilder that used to say
print "...stuff..." if $Debug > 1;
now say
print "...stuff..." if DEBUG > 1;
where DEBUG is the constant-sub whose default value set at compile
time is 0. The point of this is that for the typical
compilation-instance of TreeBuilder will run with DEBUG = 0, and
having that set at compile time means that all the "print ... if
DEBUG" can be optimized away at compile time, so they don't appear
in the code tree for TreeBuilder. This leads to a typical ~10%
speedup in TreeBuilder code, since it's no longer having to
constantly interrogate $Debug.
Note that if you really do NEED the debug level to vary at runtime,
say:
sub HTML::TreeBuilder::DEBUG () { $HTML::TreeBuilder::DEBUG };
and then change that variable's value as need be. Do this only if
necessary, tho.
BTW, useful line to have in your ~/.cshrc:
alias deparse 'perl -MO=Deparse \!*'
I found it useful for deparsing TreeBuilder.pm to make sure that
the DEBUG-conditional statements really were optimized away
as I intended.
2000-09-04 Sean M. Burke
Release 3.04
In TreeBuilder: added p_strict, an option to somewhat change
behavior of implicating ""s.
Added store_comments, store_declarations, store_pis, to control
treatment of comments, declarations, and PIs when parsing.
In Element: documented the pseudo-elements (~comment, ~declaration,
~pi, and ~literal). Corrected as_HTML dumping of ~pi elements.
Removed formfeeds from source of Element and TreeBuilder --
different editors (and Perl) treat them differently as far as
incrementing the line counter; so Perl might report an error on
line 314, but preceding formfeeds might make your editor think that
that line is actually 316 or something, resulting in confusion all
around. Ahwell.
2000-08-26 Sean M. Burke
Release 3.03
Introduced an optimization in TreeBuilder's logic for checking that
body-worthy elements are actually inserted under body. Should
speed things up a bit -- it saves two method calls per typical
start-tag. Hopefully no change in behavior.
Whoops -- 3.01's change in the return values of TreeBuilder's
(internal) end(...) method ended up breaking the processing of list
elements. Fixed. Thanks to Claus Schotten for spotting this.
Whoops 2 -- Margarit A. Nickolov spotted that TreeBuilder
documented a implicit_body_p_tag method, but the module didn't
define it. I must have deleted it some time or other. Restored.
2000-08-20 Sean M. Burke
Release 3.02
Fixed a silly typo in Element that made delete_ignorable_whitespace
useless.
Made Element's $tree->dump take an optional output-filehandle
argument.
Added (restored?) "use integer" to TreeBuilder.
2000-08-20 Sean M. Burke
Release 3.01
Now depends on HTML::Tagset for data tables of HTML elements and
their characteristics.
Version numbers for HTML::TreeBuilder and HTML::Element, as well as
for the package, moved forward to 3.01.
Minor changes to HTML::TreeBuilder's docs.
HTML::TreeBuilder now knows not to amp-decode text children of
CDATA-parent elements. Also exceptionally stores comments under
CDATA-parent elements.
TreeBuilder should now correctly parse documents with frameset
elements. Tricky bunch of hacks.
TreeBuilder now ignores those pointless "x-html" tags that a
certain standards-flouting monopolistic American software/OS
company's mailer wraps its HTML in.
Introduced "tweaks" in HTML::TreeBuilder -- an experimental
(and quite undocumented) feature to allow specifying callbacks
to be called when specific elements are closed; makes possible
rendering (or otherwise scanning and/or manipulating) documents
as they are being parsed. Inspired by Michel Rodriguez's clever
XML::Twig module. Until I document this, email me if you're
interested.
HTML::Element's as_HTML now knows not to amp-escape children of
CDATA-parent elements. Thanks to folks who kept reminding me about this.
HTML::Element's as_HTML can now take an optional parameter
specifying which non-empty elements will get end-tags omitted.
HTML::Element's traverse's docs moved into separate POD,
HTML::Element::traverse.
Added HTML::Element methods all_attr_names and
all_external_attr_names. Fixed bug in all_external_attr.
Added HTML::Element method delete_ignorable_whitespace.
(Actually just moved from HTML::TreeBuilder, where it was
undocumented, and called tighten_up.)
Adding a bit of sanity checking to Element's look_down, look_up.
Added some formfeeds to the source of Element and TreeBuilder,
to make hardcopy a bit more readable.
2000-06-28 Sean M. Burke
Release 0.68
Fixed doc typo for HTML::Element's lineage_tag_names method.
Fixed lame bug in HTML::Element's all_external_attr that made it
quite useless. Thanks to Rich Wales for the bug
report and patch.
Changed as_text to no longer DEcode entities, as it formerly did,
and was documented to. Since entities are already decoded by time
text is stored in the tree, another decoding step is wrong. Neither
me nor Gisle Aas can remember what that was doing there in the
first place.
Changed as_text to not traverse under 'style' and 'script'
elements. Rewrote as_text's traverser to be iterative.
Added a bit of text to HTML::AsSubs to recommend using XML::Generator.
2000-06-12 Sean M. Burke
Release 0.67. Just changes to HTML::Element...
Introduced look_up and look_down. Thanks to the folks on the
libwww list for helping me find the right form for that idea.
Deprecated find_by_attribute
Doc typo fixed: at one point in the discussion of "consolidating
text", I said push_content('Skronk') when I meant
unshift_content('Skronk'). Thanks to Richard Y. Kim (ryk@coho.net)
for pointing this out.
Added left() and right() methods.
Made address([address]) accept relative addresses (".3.0.1")
Added content_array_ref and content_refs_list.
Added a bit more clarification to bits of the Element docs here and there.
Made find_by_tag_name work iteratively now, for speed.
2000-05-18 Sean M. Burke
Release 0.66
Noting my new email address.
Fixed bug in HTML::Element::detach_content -- it would return
empty-list, instead of returing the nodes detached.
Fixed big in HTML::Element::replace_with_content -- it would
accidentally completely kill the parent's content list!
Thanks to Reinier Post and others for spotting this error.
Fixed big in HTML::Element::replace_with -- it put replacers
in the content list of of the new parent, !but! forgot to update
each replacer's _parent attribute.
Thanks to Matt Sisk for spotting this error.
2000-03-26 Sean M. Burke
Release 0.65
Important additions to HTML::Element :
Totally reimplemented the traverse() method, and added features,
now providing a somewhat-new interface. It's still
backwards-compatible both syntactically and semantically.
Added methods: content_list, detach_content, replace_linkage,
normalize_content, preinsert, postinsert, and has_insane_linkage.
$h->attr('foo', undef) now actually deletes the attribute
'foo' from $h, instead of setting it to undef. Hopefully
this won't break any existing code!
Rearranged the order of some sections in the Element docs
for purely pedagogical reasons.
Bugfix: $tree->clone failed to delete the internal
_head and _body attributes of the clone (used by TreeBuilder),
$tree->clone->delete ended up deleting most/all of the original!
Fixed. Added cavets to the docs warning against cloning
TreeBuilder objects that are in mid-parse (not that I think most
users are exactly rushing to do this).
Thanks to Bob Glickstein for finding and reporting this bug.
Added some regression/sanity tests in t/
A bit more sanity checking in TreeBuilder: checks for _head and
_body before including it.
Modded TreeBuilder's calls to traverse() to be use new [sub{...},0]
calling syntax, for sake of efficiency.
Added some undocumented and experimental code in Element and
TreeBuilder for using HTML::Element objects to represent
comments, PIs, declarations, and "literals".
2000-03-08 Sean M. Burke
Release 0.64
Bugfix: $element->replace_with_content() would cause
a fatal error if any of $element's content nodes were
text segments. Fixed.
2000-03-08 Sean M. Burke
Release 0.63
Fixed a typo in the SYNOPSIS of TreeBuilder.pm: I had "->destroy" for
"->delete"!
Added $element->clone and HTML::Element->clone_list(nodes) methods,
as Marek Rouchal very helpfully suggested.
$tree->as_HTML can now indent, hopefully properly. The logic to do
so is pretty frightening, and regrettably doesn't wrap, and it's
not obvious how to make it capable of doing so.
$tree->as_text can now take a 'skip_dels' parameter.
Added $h->same_as($j) method.
Added $h->all_attr method.
Added $h->new_from_lol constructor method.
1999-12-18 Sean M. Burke
Release 0.62
Incremented HTML::AsSubs version to 1.13, and HTML::Parse version
to 2.7, to avoid version confusion with the old (<0.60) HTML-Tree
dist.
Re-simplified the options to HTML::Element::traverse, removing the
verbose_for_text option. (The behavior that it turned on, is now
always on; this should not cause any problems with any existing
code.)
Fixed HTML::Element::delete_content, and made an
HTML::TreeBuilder::delete to override it for TreeBuilder nodes,
which have their own special attributes.
HTML::Element::find_by_attribute, find_by_attribute, and get_attr_i
now behave differently in scalar context, if you're the sort that
likes context on method calls. HTML::Element::descendant is now
optimized in scalar context.
Fixed up some of the reporting of lineages in some $Debug-triggered
messages.
Fixed minor bug in updating pos when a text node under HTML
implicates BODY (and maybe P).
You should not use release 0.61
1999-12-15 Sean M. Burke
Release 0.61
Versions in this dist:
HTML::Parse: 2.6
HTML::TreeBuilder: 2.91
HTML::Element: 1.44
HTML::AsSubs: 1.12
No longer including the Formatter modules.
Lots of new methods and changes in HTML::Element; reorganized docs.
Added new HTML tags to HTML::Element's and HTML::TreeBuilder's
internal tables.
Reworked the logic in HTML::TreeBuilder. Previous versions dealt
badly with tables, and attempts to enforce content-model rules
occasionally went quite awry. This new version is much less
agressive about content-model rules, and works on the principle
that if the HTML source is cock-eyed, there's limits to what can be
done to keep the syntax tree from being cock-eyed.
HTML::TreeBuilder now also tries to ignore ignorable whitespace.
The resulting parse trees often have half (or fewer) the number of
nodes, without all the ignorable " " nodes like before.
1999-12-15 Gisle Aas
Release 0.53
Make it compatible with HTML-Parser-3.00
1999-11-10 Gisle Aas
Release 0.52
Fix SYNOPSIS for HTML::FormatText as suggested by
Michael G Schwern
Updated my email address.
1998-07-07 Gisle Aas
Release 0.51
Avoid new warnings introduced by perl5.004_70
1998-04-01 Gisle Aas
Release 0.50, the HTML::* modules the dealt with HTML syntax trees
was unbundled from libwww-perl-5.22.
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