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= XPath
XPath is a Ruby DSL around a subset of XPath 1.0. It's primary purpose is to
facilitate writing complex XPath queries from Ruby code.
== Generating expressions
To create quick, one of expressions, XPath.generate can be used:
XPath.generate { |x| x.descendant(:ul)[x.attr(:id) == 'foo'] }
However for more complex expressions, it is probably ore convenient to include
the XPath module into your own class or module:
module MyXPaths
include XPath
def foo_ul
descendant(:ul)[attr(:id) == 'foo']
end
def password_field(id)
descendant(:input)[attr(:type) == 'password'][attr(:id) == id]
end
end
Both ways return an XPath::Expression instance, which can be further modified.
To convert the expression to a string, just call #to_s on it.
== HTML
XPath comes with a set of premade XPaths for use with HTML documents.
== License
(The MIT License)
Copyright © 2010 Jonas Nicklas
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the ‘Software’), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is furnished to do
so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED ‘AS IS’, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
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