Class: HTML::Document

Inherits:
Object show all
Defined in:
actionpack/lib/action_controller/vendor/html-scanner/html/document.rb

Overview

A top-level HTML document. You give it a body of text, and it will parse that text into a tree of nodes.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(text, strict = false, xml = false) ⇒ Document

Create a new Document from the given text.


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# File 'actionpack/lib/action_controller/vendor/html-scanner/html/document.rb', line 15

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, strict)

    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
          if node_stack.last.children.empty?
            node_stack.last.children << Text.new(node_stack.last, node.line, node.position, "")
          end
          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

Instance Attribute Details

#rootObject (readonly)

The root of the parsed document.


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# File 'actionpack/lib/action_controller/vendor/html-scanner/html/document.rb', line 12

def root
  @root
end

Instance Method Details

#find(conditions) ⇒ Object

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.


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# File 'actionpack/lib/action_controller/vendor/html-scanner/html/document.rb', line 55

def find(conditions)
  @root.find(conditions)
end

#find_all(conditions) ⇒ Object

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.


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# File 'actionpack/lib/action_controller/vendor/html-scanner/html/document.rb', line 62

def find_all(conditions)
  @root.find_all(conditions)
end