65 lines
2.2 KiB
Ruby
65 lines
2.2 KiB
Ruby
require File.dirname(__FILE__) + '/tokenizer'
|
|
require File.dirname(__FILE__) + '/node'
|
|
|
|
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
|