Module: Hpricot::Traverse

Defined in:
lib/common/http/fix_hpricot.rb

Instance Method Summary collapse

Instance Method Details

#search(expr, &blk) ⇒ Object 



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# File 'lib/common/http/fix_hpricot.rb', line 27

def search(expr, &blk)
    if Range === expr
        return Elements.expand(at(expr.begin), at(expr.end), expr.exclude_end?)
    end
    last = nil
    nodes = [self]
    done = []
    expr = expr.to_s
    hist = []
    until expr.empty?
        expr = clean_path(expr)
        expr.gsub!(%r!^//!, '')

        case expr
        when %r!^/?\.\.!
            last = expr = $'
            nodes.map! { |node| node.parent }
        when %r!^[>/]\s*!
            last = expr = $'
            nodes = Elements[*nodes.map { |node| node.children if node.respond_to? :children }.flatten.compact]
        when %r!^\+!
            last = expr = $'
            nodes.map! do |node|
                siblings = node.parent.children
                siblings[siblings.index(node)+1]
            end
            nodes.compact!
        when %r!^~!
            last = expr = $'
            nodes.map! do |node|
                siblings = node.parent.children
                siblings[(siblings.index(node)+1)..-1]
            end
            nodes.flatten!
        when %r!^[|,]!
            last = expr = " #$'"
            nodes.shift if nodes.first == self
            done += nodes
            nodes = [self]
        else
            #puts "++++++++++++++++"
            #p   expr
            m = expr.match(%r!^([#.]?)([a-z0-9\\*_-]*)!i).to_a
            #p   m
            after = $'
            #p   after
            #mt = after[%r!:[a-z0-9\\*_-]+!i, 0]
            mt = after[%r!^:[a-z0-9\\*_-]+!i, 0]
            #p   mt
            oop = false
            if mt and not (mt == ":not" or Traverse.method_defined? "filter[#{mt}]")
                after = $' 
                m[2] += mt
                expr = after
            end
            if m[1] == '#'
                oid = get_element_by_id(m[2])
                nodes = oid ? [oid] : []
                expr = after
            else
                m[2] = "*" if after =~ /^\(\)/ || m[2] == "" || m[1] == "."
                ret = []
                nodes.each do |node|
                    case m[2]
                    when '*'
                        node.traverse_element { |n| ret << n }
                    else
                        if node.respond_to? :get_elements_by_tag_name
                          ret += [*node.get_elements_by_tag_name(m[2])] - [*(node unless last)]
                        end
                    end
                end
                nodes = ret
            end
            last = nil
        end

        hist << expr
        break if hist[-1] == hist[-2]
        nodes, expr = Elements.filter(nodes, expr)
    end
    nodes = done + nodes.flatten.uniq
    if blk
        nodes.each(&blk)
        self
    else
        Elements[*nodes]
    end
end