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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@6441 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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ser 2004-06-10 02:01:04 +00:00
parent f2b75020ba
commit 3289dfc78b
13 changed files with 246 additions and 123 deletions
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168
lib/rexml/parsers/xpathparser.rb
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@ -30,46 +30,126 @@ module REXML
parsed
end
def to_string( path )
def abbreviate( path )
path = path.kind_of?(String) ? parse( path ) : path
string = ""
document = false
while path.size > 0
case path[0]
when :ancestor, :ancestor_or_self, :attribute, :child, :descendant, :descendant_or_self, :following, :following_sibling, :namespace, :parent, :preceding, :preceding_sibling, :self
op = path.shift
string << "/" unless string.size == 0
string << op.to_s
string << "::"
op = path.shift
case op
when :node
when :attribute
string << "/" if string.size > 0
string << "@"
when :child
string << "/" if string.size > 0
when :descendant_or_self
string << "/"
when :self
string << "."
when :parent
string << ".."
when :any
path.shift
string << "*"
when :text
string << "text()"
when :following, :following_sibling,
:ancestor, :ancestor_or_self, :descendant,
:namespace, :preceding, :preceding_sibling
string << "/" unless string.size == 0
string << op.to_s.tr("_", "-")
string << "::"
when :qname
path.shift
prefix = path.shift
name = path.shift
string << prefix+":" if prefix.size > 0
string << name
when :predicate
path.shift
string << '['
string << predicate_to_string( path.shift )
string << ' ]'
string << predicate_to_string( path.shift ) {|x| abbreviate( x ) }
string << ']'
when :document
document = true
when :function
string << path.shift
string << "( "
string << predicate_to_string( path.shift[0] ) {|x| abbreviate( x )}
string << " )"
when :literal
string << %Q{ "#{path.shift}" }
else
string << "/" unless string.size == 0
string << "UNKNOWN("
string << path.shift.inspect
string << op.inspect
string << ")"
end
end
string = "/"+string if document
return string
end
def predicate_to_string( path )
def expand( path )
path = path.kind_of?(String) ? parse( path ) : path
string = ""
document = false
while path.size > 0
op = path.shift
case op
when :node
string << "node()"
when :attribute, :child, :following, :following_sibling,
:ancestor, :ancestor_or_self, :descendant, :descendant_or_self,
:namespace, :preceding, :preceding_sibling, :self, :parent
string << "/" unless string.size == 0
string << op.to_s.tr("_", "-")
string << "::"
when :any
string << "*"
when :qname
prefix = path.shift
name = path.shift
string << prefix+":" if prefix.size > 0
string << name
when :predicate
string << '['
string << predicate_to_string( path.shift ) { |x| expand(x) }
string << ']'
when :document
document = true
else
string << "/" unless string.size == 0
string << "UNKNOWN("
string << op.inspect
string << ")"
end
end
string = "/"+string if document
return string
end
def predicate_to_string( path, &block )
string = ""
case path[0]
when :and, :or, :mult, :plus, :minus, :neq, :eq, :lt, :gt, :lteq, :gteq, :div, :mod, :neq, :union
when :and, :or, :mult, :plus, :minus, :neq, :eq, :lt, :gt, :lteq, :gteq, :div, :mod, :union
op = path.shift
left = predicate_to_string( path.shift )
right = predicate_to_string( path.shift )
case op
when :eq
op = "="
when :lt
op = "<"
when :gt
op = ">"
when :lteq
op = "<="
when :gteq
op = ">="
when :neq
op = "!="
when :union
op = "|"
end
left = predicate_to_string( path.shift, &block )
right = predicate_to_string( path.shift, &block )
string << " "
string << left
string << " "
@ -82,7 +162,7 @@ module REXML
name = path.shift
string << name
string << "( "
string << predicate_to_string( path.shift )
string << predicate_to_string( path.shift, &block )
string << " )"
when :literal
path.shift
@ -91,7 +171,7 @@ module REXML
string << " "
else
string << " "
string << to_string( path )
string << yield( path )
string << " "
end
return string.squeeze(" ")
@ -534,7 +614,6 @@ module REXML
#| FUNCTION_NAME '(' ( expr ( ',' expr )* )? ')'
def FunctionCall rest, parsed
path, arguments = parse_args(rest)
#puts "Function call >>> (#{arguments.inspect})"
argset = []
for argument in arguments
args = []
@ -567,28 +646,39 @@ module REXML
def parse_args( string )
arguments = []
ind = 0
inquot = false
inapos = false
depth = 1
begin
case string[ind]
when ?(
depth += 1
if depth == 1
string = string[1..-1]
ind -= 1
end
when ?)
depth -= 1
if depth == 0
s = string[0,ind].strip
arguments << s unless s == ""
string = string[ind+1..-1]
end
when ?,
if depth == 1
s = string[0,ind].strip
arguments << s unless s == ""
string = string[ind+1..-1]
ind = 0
when ?"
inquot = !inquot unless inapos
when ?'
inapos = !inapos unless inquot
else
unless inquot or inapos
case string[ind]
when ?(
depth += 1
if depth == 1
string = string[1..-1]
ind -= 1
end
when ?)
depth -= 1
if depth == 0
s = string[0,ind].strip
arguments << s unless s == ""
string = string[ind+1..-1]
end
when ?,
if depth == 1
s = string[0,ind].strip
arguments << s unless s == ""
string = string[ind+1..-1]
ind = -1
end
end
end
end
ind += 1