Commit Graph

523 Commits

Author SHA1 Message Date
Yorick Peterse 73c5dbe636 Basic setup for lexing CSS pseudo selectors.
This includes support for the crazy 2n+1 syntax you can use with selectors such
as :nth-child().

CSS selectors: doing what XPath already does using an even crazier syntax,
because screw you.
2014-09-28 22:38:25 +02:00
Yorick Peterse ea4a429430 Lexing of various CSS operators. 2014-09-28 22:38:25 +02:00
Yorick Peterse 2ede705f1b Lexing of various primitive CSS tokens.
This includes brackes, commas, pipes (used for namespaces) and more.
2014-09-28 22:38:24 +02:00
Yorick Peterse aa60115c0a Basic boilerplate for lexing CSS selectors. 2014-09-28 22:38:24 +02:00
Yorick Peterse 0299ff1ea4 Support for Enumerator inputs in the XML lexer.
This fixes #48.
2014-09-28 22:27:30 +02:00
Yorick Peterse 5f7256eb8f Encode/decode XML entities.
When lexing XML entities such as & and < these sequences are now
converted into their "actual" forms. In turn, Oga::XML::Text#to_xml ensures they
are encoded when the method is called.

Performance wise this puts some strain on the lexer, for every T_TEXT/T_STRING
node now potentially has to have its content modified. In the benchmark
xml/lexer/string_average_bench.rb the average processing time is now about the
same as before the improvements made in
8db77c0a09. I was hoping that the lexer would
still be a bit faster, but alas this is not the case. Doing this in native code
would be a nightmare as C doesn't have a proper string replacement function. I'm
not old/sadistic enough to write on myself just yet.

This fixes #49
2014-09-28 21:53:25 +02:00
Yorick Peterse 3307e2f4d2 Remove source lines from parser error messages.
This was a gimmick in the first place. It doesn't work well with IO instances
(= requires re-reading of the input), the code was too complex and it wasn't
that useful in the end. Lets just get rid of it.

This fixes #53.
2014-09-25 22:58:06 +02:00
Yorick Peterse 8db77c0a09 Count newlines of text nodes in native code.
Instead of relying on String#count for counting newlines in text nodes, Oga now
does this in C/Java. String#count isn't exactly the fastest way of counting
characters. Performance was measured using
benchmark/xml/lexer/string_average_bench.rb. Before this patch the results were
as following:

    MRI:   0.529s
    Rbx:   4.965s
    JRuby: 0.622s

After this patch:

    MRI:   0.424s
    Rbx:   1.942s
    JRuby: 0.665s => numbers vary a bit, seem roughly the same as before

The commands used for benchmarking:

    $ rake clean # to make sure that C exts aren't shared between MRI/Rbx
    $ rake generate
    $ rake fixtures
    $ ruby benchmark/xml/lexer/string_average_bench.rb

The big difference for Rbx is probably due to the implementation of String#count
not being super fast. Some changes were made
(https://github.com/rubinius/rubinius/pull/3133) to the method, but this hasn't
been released yet.

JRuby seems to perform in a similar way, so either it was already optimizing
things for me or I suck at writing well performing Java code.

This fixes #51.
2014-09-25 22:49:11 +02:00
Yorick Peterse 4469ffc5b1 Improved HTML void element detection performance.
This ensures we only call String#downcase if we can't find an all lowercased
*and* all uppercased version of the element name. This in turn can save as many
object allocations as there are HTML opening tags.

This fixes #52.
2014-09-24 11:07:34 +02:00
Yorick Peterse c3a5ce745c Release 0.1.3 2014-09-24 00:24:00 +02:00
Yorick Peterse 75f4e81533 Use namespace_name in Attribute#to_xml
Instead of using `namespace.name` lets just use `namespace_name`. This fixes the
problem of serializing attributes where the namespace prefix is "xmlns" as the
namespace for this isn't registered by default.

This fixes #47.
2014-09-24 00:19:58 +02:00
Yorick Peterse 4818176ae0 Corrected lying documentation.
Something something I should keep that in sync in the future.
2014-09-23 17:35:18 +02:00
Yorick Peterse ee94f0dbfe Release 0.1.2. 2014-09-23 16:23:49 +02:00
Yorick Peterse 2f5c61b3eb Small cleanup for the XPath lexer. 2014-09-19 01:10:25 +02:00
Yorick Peterse 79d9ed3214 Corrected YARD argument name. 2014-09-16 14:50:17 +02:00
Yorick Peterse 317b49bcf6 Implemented a basic SAX API.
This API is a little bit dodgy (similar to Nokogiri's API) due to the use of
separate parser and handler classes. This is done to ensure that the return
values of callback methods (e.g. on_element) aren't used by Racc for building
AST trees. This also ensures that whatever variables are set by the handler
don't conflict with any variables of the parser.

This fixes #42.
2014-09-16 14:30:46 +02:00
Yorick Peterse 9e935e5d24 Force the usage of the Racc Gem.
This ensures that we're loading the Gem and not the standard library version.
2014-09-16 11:58:56 +02:00
Yorick Peterse cdfeeed85f Provide somewhat more meaningful parser errors.
While still a bit cryptic this is probably as best as we can get it. An example:

    Oga.parse_xml("<namefoo:bar=\"10\"")

    parser.rb:116:in `on_error': Unexpected string on line 1: (Racc::ParseError)

    => 1: <namefoo:bar="10"

This fixes #43.
2014-09-16 01:09:06 +02:00
Yorick Peterse 32b11ef1e2 self-close certain XML/HTML elements.
When an XML element has no child nodes a self-closing tag is used. When parsing
documents/elements in HTML mode this is only done if the element is a so called
"void element" (e.g. <link> tags).

This fixes #46.
2014-09-16 00:44:38 +02:00
Yorick Peterse 6fc7e2e254 Track document types when parsing.
When parsing XML/HTML documents the corresponding document type (:html or :xml)
is stored in Document#type.
2014-09-16 00:25:51 +02:00
Yorick Peterse 9959f5cda4 Don't remove namespace attributes when registering
When registering namespaces from an attributes list the attributes should _not_
be removed.

This fixes #45.
2014-09-15 22:04:03 +02:00
Yorick Peterse 795e669632 Ignore default NS when serializing elements.
When a default namespace is set (using xmlns="...") the method
XML::Element#to_xml should _not_ include the namespace prefix in the output.
2014-09-15 21:42:08 +02:00
Yorick Peterse 1abba1be9c Don't overwrite namespace_name with "xmlns".
This was a leftover from an early prototype.
2014-09-15 21:38:53 +02:00
Yorick Peterse 41526e7013 Whitespace pedantics in Element#namespace. 2014-09-15 21:37:54 +02:00
Yorick Peterse abbd8d6f84 Handle registering of default XML namespaces.
When the default namespace is registered (using xmlns="...") Oga now properly
sets the namespace of the container and all child elements.

This fixes #44.
2014-09-15 21:36:15 +02:00
Yorick Peterse b06eadc812 XPath support for absolute paths without tests.
This allows Oga to parse and evaluate the XPath expression "/". This expression
can be used to select just the root node/document.

This fixes #35.
2014-09-15 17:06:58 +02:00
Yorick Peterse 398aaf68bc Return a correct list of available namespaces.
This ensures that inner namespaces take precedence over outer namespaces.

Fixes #40.
2014-09-14 18:42:02 +02:00
Tero Tasanen 9f71b1ec7b Ignore casing when testing for html void elements
Fixes #36
2014-09-14 12:02:02 +03:00
Yorick Peterse ee538ddcc2 Merge pull request #34 from ttasanen/fix_comment
Fix function name in comment
2014-09-13 16:22:55 +02:00
Tero Tasanen 5979798356 Fix function name in comment 2014-09-13 16:22:06 +03:00
Yorick Peterse d082822cdc Removed the node_type method crap.
The logic this was used for now only resides in the pull parser, instead of
being exposed to the public.

This fixes #30.
2014-09-13 15:09:52 +02:00
Yorick Peterse 9ab5c302f7 Release 0.1.1. 2014-09-13 11:50:30 +02:00
Yorick Peterse b8a82b2094 Separate XML attributes by spaces.
This was originally reported by @jrochkind and partially patched by @billdueber.
My patches are built upon the latter, but without the need of using Array#map,
Array#join, etc. They also contain a few style changes.

This fixes #32 and #33.
2014-09-13 11:47:06 +02:00
Yorick Peterse 019ba8c660 Set the initial version to 0.1.0. 2014-09-11 14:11:24 +02:00
Yorick Peterse 319d622fa5 Include namespaces when converting attrs to XML. 2014-09-11 14:03:04 +02:00
Yorick Peterse c45d32a37e Methods for adding attributes to elements.
The methods XML::Element#add_attribute and XML::Element#set can be used to more
easily add attributes to elements. The first method simply adds an Attribute
instance and links it to the element. This allows for fine grained control over
what data the attribute should contain. The second method ("set") simply sets an
attribute based on a name and value, optionally creating the attribute if it
doesn't already exist.
2014-09-10 23:55:29 +02:00
Yorick Peterse 6cb2d54875 Added XML::Element#inner_text=
This method can be used to more easily set the text of an element, without
having to manually muck around with XML::Text instances.
2014-09-10 23:25:39 +02:00
Yorick Peterse 6d19c9b311 Added XML::Element#get
This method can be used to directly retrieve an attribute value.
2014-09-10 19:03:32 +02:00
Yorick Peterse e2dab952d0 Added XML::Node#before and XML::Node#after
These methods can be used to insert nodes before/after other nodes without
manually having to mess around with node sets.

This fixes #28.
2014-09-09 22:48:31 +02:00
Yorick Peterse fccc6359e1 Corrected YARD formatting. 2014-09-09 00:47:51 +02:00
Yorick Peterse ef03a12f99 Optimize descendant-or-self and child axes.
By using NodeSet#concat we can further reduce the amount of object allocations.
This in turn greatly reduces the time it takes to query large documents using
descendant-or-self.
2014-09-05 20:20:13 +02:00
Yorick Peterse 9f6035e784 Reduce object allocations in on_axis_descendant
By using Traversal#each_node and _not_ calling on_test() (which was only called
for node_matches?) we can save ourselves a few object allocations.
2014-09-05 19:58:37 +02:00
Yorick Peterse 98984de540 Moved Document#each_node into a separate module.
This allows it to be re-used by XML::Node.
2014-09-05 19:42:38 +02:00
Yorick Peterse 8f562c24dd Use NodeSet#concat for descendant-or-self.
In a sample XML file this removes around 3400 NodeSet allocations.
2014-09-05 10:56:49 +02:00
Yorick Peterse bcdce306e5 Added NodeSet#concat.
This method allows two sets to be concatenated together without the need of
creating a 3rd node set (as is the case with NodeSet#+).
2014-09-05 10:07:22 +02:00
Yorick Peterse 1fdf876a93 Tweaked docs of the XPath code a bit. 2014-09-04 10:17:32 +02:00
Yorick Peterse d8e2b97031 Tweaked docs of the XML parsers. 2014-09-04 09:34:59 +02:00
Yorick Peterse fbf3ae6e36 Manually increment XPath indexes.
This ensures that the index is only incremented for elements that match a node
test.
2014-09-03 23:56:13 +02:00
Yorick Peterse 81a62a6f00 Added XML::Attribute#text
This allows attributes to also be used for axes such as "=".
2014-09-03 23:38:00 +02:00
Yorick Peterse dc5874f5aa Show XML parsing errors when using IO as input.
Previously this wouldn't display anything due to the IO object being exhausted.
To fix this the input has to be wound back to the start, which means re-reading
it. Sadly I can't think of a way around this that doesn't require buffering
lines while parsing them (which massively increases memory usage).
2014-09-03 22:52:59 +02:00
Yorick Peterse d67f43508d Use #each_line instead of #lines.
IO#each_line is deprecated so lets not rely on it.
2014-09-03 22:31:54 +02:00
Yorick Peterse bd31379c85 Fixed processing of nested predicates.
This ensures that nested predicates and functions that depend on predicates are
processed correctly.
2014-09-03 20:56:07 +02:00
Yorick Peterse e858b54c58 Use nested node stacks for predicates.
This ensures the current context node is set correctly when using the "self"
axis inside a path that's inside a predicate, e.g.

    foo/bar[baz/. = "something"]

Here the "self" axis should refer to foo/bar/baz, _not_ foo/bar.
2014-09-03 19:54:16 +02:00
Yorick Peterse 2b96d65103 XPath "self" axis inside predicates.
The "self" axis should use the current context node when inside a predicate.
2014-09-03 09:40:17 +02:00
Yorick Peterse 71f2b42074 Convenience methods for parsing XML/HTML. 2014-09-03 09:31:48 +02:00
Yorick Peterse d92133ef43 Benchmark Oga XPath evaluation without the parser.
This gives better insight in the performance of the evaluator itself.
2014-09-02 20:55:42 +02:00
Yorick Peterse 9649b50cc9 XML module for more easily querying using XPath. 2014-09-02 20:16:52 +02:00
Yorick Peterse ad34ab47a0 Support for binding/evaluating XPath variables. 2014-09-02 19:04:02 +02:00
Yorick Peterse 5a0e8c5480 Lexing/parsing of XPath variable references. 2014-09-02 10:52:08 +02:00
Yorick Peterse 5de37bdf81 Support for the XPath ">=" operator. 2014-09-01 22:45:01 +02:00
Yorick Peterse 099227901a Support for the XPath "<=" operator. 2014-09-01 22:40:50 +02:00
Yorick Peterse 6eacf74da4 Fixed comparing node equality in XPath expressions
Previously this would take the text of the entire node set, not of the first
node in the set.
2014-09-01 22:34:18 +02:00
Yorick Peterse 8884db8cb6 Support for the XPath ">" operator. 2014-09-01 22:23:35 +02:00
Yorick Peterse 6b45a03cb4 Support for the XPath "<" operator. 2014-09-01 22:20:32 +02:00
Yorick Peterse e1d9e62b72 Support for the XPath "!=" operator. 2014-09-01 20:48:11 +02:00
Yorick Peterse 9e5f15787d Support for the XPath "=" operator. 2014-09-01 18:57:12 +02:00
Yorick Peterse a70645fb89 Support for the XPath sub/- operator. 2014-08-29 09:41:17 +02:00
Yorick Peterse 89686b6cff Support for the XPath mul/* operator. 2014-08-29 09:36:40 +02:00
Yorick Peterse 034b360d13 Support for the XPath "mod" operator. 2014-08-29 09:31:11 +02:00
Yorick Peterse 78c8cd1323 Support for the XPath "div" operator. 2014-08-28 23:05:12 +02:00
Yorick Peterse ced7f739fc Support for the XPath "add" / "+" operator. 2014-08-28 21:18:09 +02:00
Yorick Peterse 4fa40b58cf Support for the XPath "or" operator. 2014-08-28 21:01:12 +02:00
Yorick Peterse 4f189d9218 Support for the XPath "and" operator. 2014-08-28 09:42:55 +02:00
Yorick Peterse 809ed9bfa6 Handle boolean values in the boolean() function. 2014-08-28 09:36:21 +02:00
Yorick Peterse 8fb8fb17b6 Clarified docs for floor(), ceiling() and round(). 2014-08-28 00:01:33 +02:00
Yorick Peterse 543112dcdc Support for the XPath round() function. 2014-08-28 00:00:25 +02:00
Yorick Peterse a2b8e3c954 Support for the XPath ceiling() function. 2014-08-27 23:56:43 +02:00
Yorick Peterse c8fb1ad202 Support for the XPath floor() function. 2014-08-27 23:52:23 +02:00
Yorick Peterse 7c68f2a49b Raise for non node sets in the sum() function.
According to the XPath spec this function *can only* take node sets, nothing
else. Lets actually enforce that.
2014-08-27 23:47:19 +02:00
Yorick Peterse ac06670c24 Better conversion of types to numbers.
The XPath number() function should also be capable of converting booleans to
numbers, something it previously was not able to do. In order to do this
reliably we can't rely on the string() function as this would make it impossible
to distinguish between literal string values and booleans. This is due to
true(), which returns a TrueClass, being converted to the string "true". This
string in turn can't be converted to a float.
2014-08-27 23:38:47 +02:00
Yorick Peterse fcb28d5ae8 Specs for various XPath evaluator helper methods. 2014-08-27 23:37:12 +02:00
Yorick Peterse 30a5d01ebd Support for the XPath sum() function. 2014-08-27 23:05:04 +02:00
Yorick Peterse 585b3535b2 Support for the XPath lang() function. 2014-08-27 20:26:27 +02:00
Yorick Peterse 10e82de87b Handle boolean values in predicate results. 2014-08-27 20:26:10 +02:00
Yorick Peterse 7c41fa814f Default attribute namespaces.
When an attribute is prefixed with "xml" the default namespace should be used
automatically. This namespace is not registered on element level by default as
this namespace isn't registered manually, instead it's a "magic" namespace. This
also ensures we match the behaviour of libxml more closely, hopefully reducing
confusion.
2014-08-27 20:24:40 +02:00
Yorick Peterse d2f991538d Support for the XPath true()/false() functions. 2014-08-27 09:37:28 +02:00
Yorick Peterse 4ef79bad90 Support for the XPath not() function. 2014-08-27 09:35:02 +02:00
Yorick Peterse 338aeeb514 Work around JRuby issue #1923.
String#start_with?() returns false on JRuby when used with an empty string. See
https://github.com/jruby/jruby/issues/1923 for more information.
2014-08-26 21:08:50 +02:00
Yorick Peterse 29870c21f2 Use char Arrays in on_call_translate().
When running a 1.9 based Ruby Enumerable doesn't have the method #[].
2014-08-26 20:41:16 +02:00
Yorick Peterse e288ab88f5 Support for the XPath boolean() function. 2014-08-26 20:22:28 +02:00
Yorick Peterse bcd138a15a Lexing of explicit negative/positive XPath numbers 2014-08-26 20:21:30 +02:00
Yorick Peterse 8295fa5783 Support for the XPath translate() function. 2014-08-26 18:14:44 +02:00
Yorick Peterse 7f3f626744 Support for the XPath normalize-space() function. 2014-08-26 00:06:58 +02:00
Yorick Peterse 06bed1cfdd Support for the XPath string-length() function. 2014-08-25 23:46:18 +02:00
Yorick Peterse a60057db5c Proper handling of decimals for string() calls.
When calling the string() XPath function floats with zero decimals (10.0, 5.0,
etc) should result in a string without any decimals. Ruby converts 10.0 to
"10.0" whereas XPath expects "10".
2014-08-25 23:21:36 +02:00
Yorick Peterse 6c0c5ab720 Revert "Return XPath integers as actual integers."
The particular case of string(10) having to return "10" instead of "10.0" will
be handled separately. Returning integers breaks behaviour/expectations
elsewhere.

This reverts commit 431a253000.
2014-08-25 23:14:22 +02:00
Yorick Peterse a1a2190fe2 Support for the XPath substring() function. 2014-08-25 23:13:34 +02:00
Yorick Peterse 5382891106 Support for the XPath number() function. 2014-08-25 23:13:03 +02:00
Yorick Peterse ba058627f2 Corrected docs for on_call_string(). 2014-08-25 23:12:45 +02:00
Yorick Peterse b2ca18e127 Support for the XPath substring-after() function. 2014-08-25 22:19:13 +02:00
Yorick Peterse b9cdb4a72b Support for the XPath substring-before() function. 2014-08-25 22:11:05 +02:00
Yorick Peterse 83b873e3c1 Support for the XPath contains() function. 2014-08-25 21:52:33 +02:00
Yorick Peterse 5b65d6c31a Support for the xpath starts-with() function. 2014-08-25 09:43:06 +02:00
Yorick Peterse 276a5ab83b Support for lexing empty XPath strings. 2014-08-25 09:42:51 +02:00
Yorick Peterse b688c6dc1b Support for the XPath concat() function. 2014-08-23 20:24:18 +02:00
Yorick Peterse 431a253000 Return XPath integers as actual integers.
This is to ensure that calls such as string(10) return "10" and not "10.0". It
also saves integer -> float conversions when they're not needed.
2014-08-23 20:22:58 +02:00
Yorick Peterse b316fd3e1c Support for the XPath string() function. 2014-08-22 11:06:10 +02:00
Yorick Peterse ff8a4ad3aa Ignore comment nodes in NodeSet#text. 2014-08-22 11:05:39 +02:00
Yorick Peterse 99be3182ae Support for evaluating XPath floats. 2014-08-22 10:59:03 +02:00
Yorick Peterse 6ac3408a71 Match all node types when using node()
Previously this would only match element and text nodes.
2014-08-22 10:58:36 +02:00
Yorick Peterse da09f1296c Support for using namespace-uri() with attributes. 2014-08-21 22:36:18 +02:00
Yorick Peterse 0d41693bfc Support for using name() with attributes. 2014-08-21 21:05:06 +02:00
Yorick Peterse acc056eea4 Support for using local-name() on attributes. 2014-08-21 21:03:28 +02:00
Yorick Peterse 1dd6416bea Basic support for the XPath name() function. 2014-08-21 20:47:20 +02:00
Yorick Peterse e7019ceb4c Renamed context_node to function_node. 2014-08-21 19:06:14 +02:00
Yorick Peterse 8cc0db2283 Support for the XPath namespace-uri() function. 2014-08-21 19:02:41 +02:00
Yorick Peterse 9e20b5ca3e Support for the XPath local-name() function. 2014-08-21 10:21:02 +02:00
Yorick Peterse 2deb7a6d84 Support for the XPath id() function.
This comes with the limitation that it *always* uses the "id" attribute. This is
due to Oga not supporting DTD parsing/evaluation.
2014-08-20 21:06:35 +02:00
Yorick Peterse d351bc26cc Support for the XPath count() function. 2014-08-20 10:16:06 +02:00
Yorick Peterse 709fa365e0 XPath support for last() + evaluator docs.
I really dislike using a stack as it introduces an internal state. Sadly there
doesn't seem to be an easy way around this.
2014-08-19 22:59:26 +02:00
Yorick Peterse e0895be675 Better setup for XPath predicates.
This allows filtering of nodes by indexes (e.g. using last() or a literal
number) and uses the correct index range (1 to N in XPath). The function
position() is not yet supported as this requires access to the current node,
which isn't passed down the call stack just yet.
2014-08-19 19:56:56 +02:00
Yorick Peterse 202f74a8eb on_call_last() should return an index, not a node. 2014-08-19 19:56:41 +02:00
Yorick Peterse 423af37422 Basic support for the XPath last() function. 2014-08-18 19:00:32 +02:00
Yorick Peterse 2817784e6b Support for the XPath pipe operator. 2014-08-17 22:04:08 +02:00
Yorick Peterse d1735750c1 Only store unique nodes in XML::NodeSet.
It's called a "set" after all.
2014-08-17 22:03:44 +02:00
Yorick Peterse bb503728af XPath support for processing instructions. 2014-08-16 22:37:57 +02:00
Yorick Peterse 0d7609da88 Support for parsing XML processing instructions. 2014-08-15 22:23:26 +02:00
Yorick Peterse 8f4eaf3823 Lexing of XML processing instructions. 2014-08-15 22:04:45 +02:00
Yorick Peterse ccd95d69d8 Support for the XPath comment() test. 2014-08-15 20:49:13 +02:00
Yorick Peterse 4d7f224892 Support for the XPath text() type test. 2014-08-15 10:46:00 +02:00
Yorick Peterse 14aa420091 Use a new base class for XML text nodes.
The classes Text, Cdata and Comment now extend CharacterData instead of Text.
2014-08-15 10:43:16 +02:00
Yorick Peterse 24bc84e15e Added XML::Element#text_nodes.
This method returns all the text nodes directly nested in an element.
2014-08-15 10:07:49 +02:00
Yorick Peterse d0092b434d Removed Document#available_namespaces.
Namespaces aren't scoped per document but instead per element, thus this method
doesn't make that much sense. This also fixes the remaining, failing XPath test.
2014-08-14 23:12:33 +02:00
Yorick Peterse d34e4697de Match node types in node_matches?
The method XPath::Evaluator#node_matches? now has a special case to handle
"type-test" nodes. This in turn fixes a bunch of failing tests such as those for
the XPath query "parent::node()".
2014-08-14 22:54:19 +02:00
Yorick Peterse a437d67573 Renamed node_type to type_test. 2014-08-14 22:35:41 +02:00
Yorick Peterse 05f6fc2f8d Implement node() as a type test, not a function. 2014-08-14 22:30:14 +02:00
Yorick Peterse 6ad5170476 Support for lexing/parsing XPath type tests.
Unlike what I thought before syntax such as "node()" is not a function call.
Instead this is a special node test that tests the *types* of nodes, not their
names.
2014-08-14 21:51:58 +02:00
Yorick Peterse 23441bb5a4 Basic support for the XPath node() function. 2014-08-14 18:17:08 +02:00
Yorick Peterse a133b923a2 Only emit extra T_SLASH tokens for "//". 2014-08-13 01:28:43 +02:00
Yorick Peterse 4d956c9ef0 Support for the XPath "namespace" axis. 2014-08-11 00:58:57 +02:00
Yorick Peterse 873bd82273 Stricted matching of namespaced elements. 2014-08-11 00:47:07 +02:00
Yorick Peterse 33c28f633b Proper namespace support for elements.
This is still a bit rough on the edges but already way better than the broken
setup I had before.
2014-08-11 00:41:36 +02:00
Yorick Peterse 04cbbdcf9e Proper namespace support for attributes.
This separates namespace handling into namespace names and namespace objects.
The namespace objects are retrieved from the element an attribute belongs to.
Once retrieved the namespace is cached, due to the overhead of retrieving
namespaces in large documents.
2014-08-11 00:40:17 +02:00
Yorick Peterse fe8f77cf45 Basic work for supporting namespace URIs. 2014-08-08 19:03:42 +02:00
Yorick Peterse f002061aaa Extra type validation for XML::Element options. 2014-08-07 21:10:01 +02:00
Yorick Peterse b1388ff84a Ripped out inspect fuckery.
The old code used for generating Object#inspect values has been ripped out (for
the most part). The result is a non indented but far more compact #inspect
output. The code for this is also easier and doesn't break the signature of
Object#inspect.
2014-08-07 21:09:10 +02:00
Yorick Peterse 3b2279e410 Don't create empty Namespace nodes. 2014-08-07 20:16:46 +02:00
Yorick Peterse 4e18989972 Remove the uri attribute from Namespace.
Oga won't be handling URIs any time soon. The rationale is that they server zero
purpose when it comes to just parsing XML. Another goal of Oga is to make it
easy to modify and reserialize documents back to XML. If namespaces would also
store the URIs this would make this process more difficult.
2014-08-07 20:11:17 +02:00
Yorick Peterse 97e59fe449 Use the Namespace class for namespaces vs Strings. 2014-08-07 20:03:26 +02:00
Yorick Peterse f653203220 Tests for the Namespace class. 2014-08-07 20:02:56 +02:00
Yorick Peterse 8e8ea64206 Fixed serializing of elements to XML. 2014-08-06 00:04:42 +02:00
Yorick Peterse e0bbc81351 Added a very basic Namespace class. 2014-08-06 00:00:08 +02:00
Yorick Peterse d7df908649 Trimmed XML inspect values. 2014-08-05 23:57:12 +02:00
Yorick Peterse 26d4bdc5b1 Support for the XPath "self" axis. 2014-08-05 21:10:12 +02:00
Yorick Peterse 8a9b26fa73 Basic support for the preceding-sibling xpath axis 2014-08-05 19:28:26 +02:00
Yorick Peterse fc1d9776f3 Basic support for the XPath "preceding" axis. 2014-08-05 10:16:37 +02:00
Yorick Peterse 375f3d7870 Basic support for the XPath "parent" axis.
The usage of `parent::node()` is not yet supported.
2014-08-05 09:34:57 +02:00
Yorick Peterse c0a6610d65 Use has_parent? in on_axis_following_sibling. 2014-08-04 21:57:16 +02:00
Yorick Peterse a1f80b4995 Support for the "following-sibling" axis.
This also comes with some small cleanups regarding
XPath::Evaluator#node_matches?. This change removes the need to, every time,
also use can_match_node?() to prevent NoMethodError errors from popping up.
2014-08-04 21:51:51 +02:00
Yorick Peterse 57c0f4b35e Renamed `node` to `ast_node`.
This should make it a bit easier to understand what kind of data the variable is
holding.
2014-08-04 19:01:27 +02:00
Yorick Peterse 211caf00c6 Proper support for the XPath "following" axis. 2014-08-04 18:57:21 +02:00
Yorick Peterse 57fcbbd0fc Allow Document#each_node to skip child nodes.
Child nodes can be skipped by throwing :skip_children.
2014-08-04 10:00:32 +02:00
Yorick Peterse ef1ad5406a Don't yield indexes in Document#each_node.
These indexes won't be used so there's no point in yielding them.
2014-08-04 09:08:39 +02:00
Yorick Peterse 5c23333f46 Traverse document nodes in document order.
The method Document#each_node now yields the nodes in the correct order.
2014-08-01 23:34:32 +02:00
Yorick Peterse c419d8849b Shift instead of pop nodes when yielding all nodes 2014-08-01 19:00:29 +02:00
Yorick Peterse 34e2d28bbd Document#all_nodes -> Document#each_node
This method has been renamed and now yields nodes and their indexes instead of
buffering them in a node set.
2014-07-31 18:57:05 +02:00
Yorick Peterse 4bbf0c98ae Use breadth-first-search for returning all nodes.
This still uses a stack but at least no longer relies on the call stack. I
decided not to go with the Morris in-order algorithm [1] as it modifies the tree
during a search. This would not work well if a document were to be accessed from
multiple threads at once (which should be possible for read-only operations).

I might change this method to actually perform a search (opposed to just
returning everything). This will require some closer inspection of the
available XPath axes to determine if this is needed.

Tests will also be added once I've taken care of the above.

[1]: http://en.wikipedia.org/wiki/Tree_traversal#Morris_in-order_traversal_using_threading
2014-07-30 22:27:09 +02:00
Yorick Peterse 8fe71f298b Half-assed way of retrieving all document nodes.
This currently only works for documents, is not tested and most likely will leak
memory due to being recursive.
2014-07-30 19:56:56 +02:00
Yorick Peterse 52a4375278 Prepare setup for *actual* following support.
The previous commit was nonsense as I didn't understand XPath's "following" axis
properly. This commit introduces proper tests and a note for future me so that I
can implement it properly.
2014-07-30 00:16:44 +02:00
Yorick Peterse 9a97d936e3 Support for the XPath "following" axis. 2014-07-29 23:09:16 +02:00
Yorick Peterse 55e3388e30 Unfuck XPath axes evaluation.
The evaluation of axes has been fixed by changing the initial context as well as
the behaviour of some of the handler methods.

The initial context has been changed so that it's simply a NodeSet of whatever
the root object is, either a Document or an Element instance. Previously this
would be set to the child nodes of a Document in case the root object was a
Document. This in turn would prevent "child" axes from operating correctly.
2014-07-28 00:44:05 +02:00
Yorick Peterse 23de57a3a0 Parse bare XPath node tests as child axes.
When parsing a bare node test such as "A" this is now parsed as following:

    (axis "child" (test nil "A"))

Instead of this:

    (test nil "A")

According to the XPath specification both are identical and this simplifies some
of the code in the XPath evaluator.
2014-07-28 00:34:26 +02:00
Yorick Peterse 1916799fef Basic boilerplate for descendant-or-self. 2014-07-25 21:24:39 +02:00
Yorick Peterse dd37b028a0 Support for the XPath descendant axis. 2014-07-24 09:49:05 +02:00
Yorick Peterse fd37bcff1f Corrected an XPath example. 2014-07-23 18:48:53 +02:00
Yorick Peterse 54e109bf97 Corrected various YARD tags. 2014-07-22 21:28:44 +02:00
Yorick Peterse a0ecba6321 Support for the XPath child axis. 2014-07-22 21:25:02 +02:00
Yorick Peterse ec08b41737 Specs for various XPath::Evaluator helper methods. 2014-07-22 21:04:09 +02:00
Yorick Peterse 1f9d2ede95 Skip node matching for incompatible nodes. 2014-07-22 20:45:15 +02:00
Yorick Peterse 05cf07755d Basic docs for the XPath evaluator. 2014-07-22 16:12:21 +02:00
Yorick Peterse 4142504101 Revert "Lex XPath axes without a node test."
Upon further investigation this change turned out to be useless. Nokogiri/libxml
does not allow the use of long axes without tests, instead it ends up
lexing/parsing such a value as a simple node test.

This reverts commit f699b0d097.
2014-07-22 15:53:00 +02:00
Yorick Peterse c43c38fab9 Emit node() calls for certain short axes.
An axes such as "." is the same as "self::node()". To simplify things on
parser/evaluator level we'll emit the corresponding tokens for a "node()"
function call for these axes.
2014-07-22 15:50:39 +02:00
Yorick Peterse f699b0d097 Lex XPath axes without a node test. 2014-07-20 07:57:45 +02:00
Yorick Peterse 488000438b Support for querying attributes using XPath. 2014-07-20 07:47:01 +02:00
Yorick Peterse d5569ead0b Use XML::Attribute for element attributes.
Instead of using a raw Hash Oga now uses the XML::Attribute class for storing
information about element attributes.

Attributes are stored as an Array of XML::Attribute instances. This allows the
attributes to be more easily modified. If they were stored as a Hash you'd not
only have to update the attributes themselves but also the Hash that contains
them.

While using an Array has a slight runtime cost in most cases the amount of
attributes is small enough that this doesn't really pose a problem. If webscale
performance is desired at some point in the future Oga could most likely cache
the lookup of an attribute. This however is something for the future.
2014-07-20 07:29:37 +02:00
Yorick Peterse ce86785da6 Added the XML::Attribute class.
This class will replace the use of raw Hash/String values for attributes in
upcoming commits.
2014-07-16 10:08:11 +02:00
Yorick Peterse d09ab26680 Support for the ancestor-or-self axis. 2014-07-15 09:41:12 +02:00
Yorick Peterse 0211f60826 Evaluation of XPath "ancestor" axes. 2014-07-14 09:43:30 +02:00
Yorick Peterse 03f40d4024 Ripped out internal state of XPath::Evaluator.
Instead of keeping track of an internal state in @stack and @context the various
processing methods now take the context as an extra argument and return the
nodes they produced. This makes it easier to recursively call certain methods, a
requirement for processing XPath axes (e.g. the "ancestor" axis).
2014-07-14 00:07:43 +02:00
Yorick Peterse 56982dd543 Fail early when processing (test) nodes.
If a certain segment yields no nodes the on_path() method should not process any
following segments.
2014-07-12 00:22:18 +02:00
Yorick Peterse d6aec6aa16 Compare nodes in on_path instead of indexes.
This saves some code and effectively does the same thing.
2014-07-12 00:20:19 +02:00
Yorick Peterse 5808ffa7a4 Updated XPath evaluator for the new AST.
This is still a bit of a hack. Then again, it already was a hack to begin with.
2014-07-12 00:18:32 +02:00
Yorick Peterse be4f4ad744 Trimmed the XPath AST even further.
The excessive use of (path) nodes has been dropped and all parsing conflicts
have been dealt with.
2014-07-12 00:13:25 +02:00
Yorick Peterse aeb4eba260 Trim the XPath AST.
The AST has been simplified by adjusting the way (path) nodes are nested.
Operators now also use `paths` instead of `expression` to allow for expressions
such as `/A or /B`. Sadly this introduces quite a bunch of conflicts in the
parser but we'll deal with those later if needed.
2014-07-10 20:19:23 +02:00
Yorick Peterse 8fbc582547 XPath evaluation for name/namespace wildcards. 2014-07-09 22:09:20 +02:00
Yorick Peterse ed45058983 Basic support for evaluating XPath wildcards. 2014-07-09 20:06:31 +02:00
Yorick Peterse 74130df40d XPath evaluation support for absolute paths. 2014-07-09 09:28:00 +02:00
Yorick Peterse a398af19fe Use a stack based XPath evaluator.
This evaluator is capable of processing very, very basic XPath expressions. It
does not yet know anything about axes, functions, operators, etc.
2014-07-08 23:57:21 +02:00
Yorick Peterse 9c661e1e60 Added XML::NodeSet#+ and XML::NodeSet#to_a 2014-07-08 23:25:09 +02:00
Yorick Peterse 266c66569e Removed internal state of XPath::Evaluator.
Come to think of it it might actually be easier to implement the evaluator as
an actual VM. That is, instead of directly running on the AST it runs on some
flavour of bytecode. Alternatively it runs directly on the AST but behaves more
like a (stack based) VM. This would most likely be easier than passing a cursor
to every node processing method.
2014-07-08 19:19:59 +02:00