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Allow attribute hashes to span multiple lines.
This commit is contained in:
Nathan Weizenbaum
parent
7d782051a0
commit
7f7ee80116
3 changed files with 54 additions and 17 deletions
21
lib/haml.rb
21
lib/haml.rb
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@ -133,16 +133,23 @@ $LOAD_PATH << dir unless $LOAD_PATH.include?(dir)
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# The hash is placed after the tag is defined.
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# For example:
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#
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# %head{ :name => "doc_head" }
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# %script{ 'type' => "text/" + "javascript",
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# :src => "javascripts/script_#{2 + 7}" }
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# %html{:xmlns => "http://www.w3.org/1999/xhtml", "xml:lang" => "en", :lang => "en"}
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#
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# is compiled to:
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#
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# <head name="doc_head">
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# <script src='javascripts/script_9' type='text/javascript'>
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# </script>
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# </head>
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# <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"></html>
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#
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# Attribute hashes can also be stretched out over multiple lines
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# to accomidate many attributes.
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# However, newlines may only be placed immediately after commas.
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# For example:
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#
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# %script{:type => "text/javascript",
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# :src => "javascripts/script_#{2 + 7}"}
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#
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# is compiled to:
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#
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# <script src='javascripts/script_9' type='text/javascript'></script>
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#
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# ===== Attribute Methods
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#
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@ -409,6 +409,7 @@ END
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attributes[key] = value
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end
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text.count("\n").times { newline }
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attributes
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end
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@ -452,10 +453,10 @@ END
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def parse_tag(line)
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raise SyntaxError.new("Invalid tag: \"#{line}\".") unless match = line.scan(/%([-:\w]+)([-\w\.\#]*)(.*)/)[0]
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tag_name, attributes, rest = match
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attributes_hash, rest = parse_attributes(rest) if rest[0] == ?{
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attributes_hash, rest, last_line = parse_attributes(rest) if rest[0] == ?{
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if rest
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object_ref, rest = balance(rest, ?[, ?]) if rest[0] == ?[
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attributes_hash, rest = parse_attributes(rest) if rest[0] == ?{ && attributes_hash.nil?
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attributes_hash, rest, last_line = parse_attributes(rest) if rest[0] == ?{ && attributes_hash.nil?
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nuke_whitespace, action, value = rest.scan(/(<>|><|[><])?([=\/\~&!])?(.*)?/)[0]
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nuke_whitespace ||= ''
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nuke_outer_whitespace = nuke_whitespace.include? '>'
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@ -463,21 +464,36 @@ END
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end
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value = value.to_s.strip
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[tag_name, attributes, attributes_hash, object_ref, nuke_outer_whitespace,
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nuke_inner_whitespace, action, value]
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nuke_inner_whitespace, action, value, last_line || @index]
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end
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def parse_attributes(line)
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scanner = StringScanner.new(line)
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attributes_hash, rest = balance(scanner, ?{, ?})
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line = line.dup
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last_line = @index
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begin
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attributes_hash, rest = balance(line, ?{, ?})
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rescue SyntaxError => e
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if line.strip[-1] == ?, && e.message == "Unbalanced brackets."
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line << "\n" << @next_line.text
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last_line += 1
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next_line
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@block_opened = @next_line.tabs > @line.tabs && !@next_line.text.empty?
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retry
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end
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raise e
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end
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attributes_hash = attributes_hash[1...-1] if attributes_hash
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return attributes_hash, rest
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return attributes_hash, rest, last_line
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end
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# Parses a line that will render as an XHTML tag, and adds the code that will
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# render that tag to <tt>@precompiled</tt>.
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def render_tag(line)
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tag_name, attributes, attributes_hash, object_ref, nuke_outer_whitespace,
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nuke_inner_whitespace, action, value = parse_tag(line)
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nuke_inner_whitespace, action, value, last_line = parse_tag(line)
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raise SyntaxError.new("Illegal element: classes and ids must have values.") if attributes =~ /[\.#](\.|#|\z)/
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@ -517,8 +533,8 @@ END
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raise SyntaxError.new("Illegal nesting: nesting within a self-closing tag is illegal.", @next_line.index) if @block_opened && self_closing
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raise SyntaxError.new("Illegal nesting: content can't be both given on the same line as %#{tag_name} and nested within it.", @next_line.index) if @block_opened && !value.empty?
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raise SyntaxError.new("There's no Ruby code for #{action} to evaluate.") if parse && value.empty?
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raise SyntaxError.new("Self-closing tags can't have content.") if self_closing && !value.empty?
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raise SyntaxError.new("There's no Ruby code for #{action} to evaluate.", last_line - 1) if parse && value.empty?
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raise SyntaxError.new("Self-closing tags can't have content.", last_line - 1) if self_closing && !value.empty?
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self_closing ||= !!( !@block_opened && value.empty? && @options[:autoclose].include?(tag_name) )
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@ -738,7 +754,7 @@ END
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def balance(scanner, start, finish, count = 0)
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str = ''
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scanner = StringScanner.new(scanner) unless scanner.is_a? StringScanner
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regexp = Regexp.new("(.*?)[\\#{start.chr}\\#{finish.chr}]")
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regexp = Regexp.new("(.*?)[\\#{start.chr}\\#{finish.chr}]", Regexp::MULTILINE)
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while scanner.scan(regexp)
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str << scanner.matched
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count += 1 if scanner.matched[-1] == start
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@ -32,6 +32,13 @@ END
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".= a" => "Illegal element: classes and ids must have values.",
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"%p..a" => "Illegal element: classes and ids must have values.",
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"%a/ b" => "Self-closing tags can't have content.",
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"%p{:a => 'b',\n:c => 'd'}/ e" => ["Self-closing tags can't have content.", 2],
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"%p{:a => 'b',\n:c => 'd'}=" => ["There's no Ruby code for = to evaluate.", 2],
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"%p.{:a => 'b',\n:c => 'd'} e" => ["Illegal element: classes and ids must have values.", 1],
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"%p{:a => 'b',\n:c => 'd',\n:e => 'f'}\n%p/ a" => ["Self-closing tags can't have content.", 4],
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"%p{:a => 'b',\n:c => 'd',\n:e => 'f'}\n- raise 'foo'" => ["foo", 4],
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"%p{:a => 'b',\n:c => raise('foo'),\n:e => 'f'}" => ["foo", 2],
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"%p{:a => 'b',\n:c => 'd',\n:e => raise('foo')}" => ["foo", 3],
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# Regression tests
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"- raise 'foo'\n\n\n\nbar" => ["foo", 1],
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@ -121,6 +128,13 @@ END
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assert_equal("<img alt='' src='/foo.png' />\n", render("%img{:width => nil, :src => '/foo.png', :alt => String.new}"))
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end
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def test_attribute_hash_with_newlines
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assert_equal("<p a='b' c='d'>foop</p>\n", render("%p{:a => 'b',\n :c => 'd'} foop"))
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assert_equal("<p a='b' c='d'>\n foop\n</p>\n", render("%p{:a => 'b',\n :c => 'd'}\n foop"))
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assert_equal("<p a='b' c='d' />\n", render("%p{:a => 'b',\n :c => 'd'}/"))
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assert_equal("<p a='b' c='d' e='f'></p>\n", render("%p{:a => 'b',\n :c => 'd',\n :e => 'f'}"))
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end
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def test_end_of_file_multiline
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assert_equal("<p>0</p>\n<p>1</p>\n<p>2</p>\n", render("- for i in (0...3)\n %p= |\n i |"))
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end
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