Class: ERB::Compiler::TrimScanner
Overview
Constant Summary
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- ERB_STAG =
%w(<%= <%# <%)
Instance Attribute Summary collapse
Instance Method Summary
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Methods inherited from Scanner
default_scanner=, make_scanner, regist_scanner
Constructor Details
#initialize(src, trim_mode, percent) ⇒ TrimScanner
Returns a new instance of TrimScanner.
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# File 'lib/erb.rb', line 381
def initialize(src, trim_mode, percent)
super
@trim_mode = trim_mode
@percent = percent
if @trim_mode == '>'
@scan_line = self.method(:trim_line1)
elsif @trim_mode == '<>'
@scan_line = self.method(:trim_line2)
elsif @trim_mode == '-'
@scan_line = self.method(:explicit_trim_line)
else
@scan_line = self.method(:scan_line)
end
end
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Instance Attribute Details
#stag ⇒ Object
Returns the value of attribute stag
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# File 'lib/erb.rb', line 395
def stag
@stag
end
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Instance Method Details
#explicit_trim_line(line) ⇒ Object
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# File 'lib/erb.rb', line 467
def explicit_trim_line(line)
line.scan(/(.*?)(^[ \t]*<%\-|<%\-|<%%|%%>|<%=|<%#|<%|-%>\n|-%>|%>|\z)/m) do |tokens|
tokens.each do |token|
next if token.empty?
if @stag.nil? && /[ \t]*<%-/ =~ token
yield('<%')
elsif @stag && token == "-%>\n"
yield('%>')
yield(:cr)
elsif @stag && token == '-%>'
yield('%>')
else
yield(token)
end
end
end
end
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#is_erb_stag?(s) ⇒ Boolean
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# File 'lib/erb.rb', line 486
def is_erb_stag?(s)
ERB_STAG.member?(s)
end
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#percent_line(line, &block) ⇒ Object
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# File 'lib/erb.rb', line 409
def percent_line(line, &block)
if @stag || line[0] != ?%
return @scan_line.call(line, &block)
end
line[0] = ''
if line[0] == ?%
@scan_line.call(line, &block)
else
yield(PercentLine.new(line.chomp))
end
end
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#scan(&block) ⇒ Object
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# File 'lib/erb.rb', line 397
def scan(&block)
@stag = nil
if @percent
@src.each_line do |line|
percent_line(line, &block)
end
else
@scan_line.call(@src, &block)
end
nil
end
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#scan_line(line) ⇒ Object
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# File 'lib/erb.rb', line 422
def scan_line(line)
line.scan(/(.*?)(<%%|%%>|<%=|<%#|<%|%>|\n|\z)/m) do |tokens|
tokens.each do |token|
next if token.empty?
yield(token)
end
end
end
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#trim_line1(line) ⇒ Object
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# File 'lib/erb.rb', line 431
def trim_line1(line)
line.scan(/(.*?)(<%%|%%>|<%=|<%#|<%|%>\n|%>|\n|\z)/m) do |tokens|
tokens.each do |token|
next if token.empty?
if token == "%>\n"
yield('%>')
yield(:cr)
else
yield(token)
end
end
end
end
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#trim_line2(line) ⇒ Object
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# File 'lib/erb.rb', line 445
def trim_line2(line)
head = nil
line.scan(/(.*?)(<%%|%%>|<%=|<%#|<%|%>\n|%>|\n|\z)/m) do |tokens|
tokens.each do |token|
next if token.empty?
head = token unless head
if token == "%>\n"
yield('%>')
if is_erb_stag?(head)
yield(:cr)
else
yield("\n")
end
head = nil
else
yield(token)
head = nil if token == "\n"
end
end
end
end
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