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require File.dirname(__FILE__) + '/tokenizer'
require File.dirname(__FILE__) + '/node'
require File.dirname(__FILE__) + '/selector'
module HTML #:nodoc:
# A top-level HTMl document. You give it a body of text, and it will parse that
# text into a tree of nodes.
class Document #:nodoc:
# The root of the parsed document.
attr_reader :root
# Create a new Document from the given text.
def initialize(text, strict=false, xml=false)
tokenizer = Tokenizer.new(text)
@root = Node.new(nil)
node_stack = [ @root ]
while token = tokenizer.next
node = Node.parse(node_stack.last, tokenizer.line, tokenizer.position, token)
node_stack.last.children << node unless node.tag? && node.closing == :close
if node.tag?
if node_stack.length > 1 && node.closing == :close
if node_stack.last.name == node.name
node_stack.pop
else
open_start = node_stack.last.position - 20
open_start = 0 if open_start < 0
close_start = node.position - 20
close_start = 0 if close_start < 0
msg = <<EOF.strip
ignoring attempt to close #{node_stack.last.name} with #{node.name}
opened at byte #{node_stack.last.position}, line #{node_stack.last.line}
closed at byte #{node.position}, line #{node.line}
attributes at open: #{node_stack.last.attributes.inspect}
text around open: #{text[open_start,40].inspect}
text around close: #{text[close_start,40].inspect}
EOF
strict ? raise(msg) : warn(msg)
end
elsif !node.childless?(xml) && node.closing != :close
node_stack.push node
end
end
end
end
# Search the tree for (and return) the first node that matches the given
# conditions. The conditions are interpreted differently for different node
# types, see HTML::Text#find and HTML::Tag#find.
def find(conditions)
@root.find(conditions)
end
# Search the tree for (and return) all nodes that match the given
# conditions. The conditions are interpreted differently for different node
# types, see HTML::Text#find and HTML::Tag#find.
def find_all(conditions)
@root.find_all(conditions)
end
end
end
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