Class: Condenser::JSAnalyzer
- Inherits:
-
Object
- Object
- Condenser::JSAnalyzer
show all
- Includes:
- ParseHelpers
- Defined in:
- lib/condenser/processors/js_analyzer.rb
Instance Attribute Summary
Attributes included from ParseHelpers
#matched
Class Method Summary
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Instance Method Summary
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#current_line, #cursor, #eos?, #forward, #next_word, #pre_match, #rewind, #scan_until, #seek
Class Method Details
.call(environment, input) ⇒ Object
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# File 'lib/condenser/processors/js_analyzer.rb', line 8
def self.call(environment, input)
new.call(environment, input)
end
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.setup(env) ⇒ Object
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# File 'lib/condenser/processors/js_analyzer.rb', line 5
def self.setup(env)
end
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Instance Method Details
#call(environment, input) ⇒ Object
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# File 'lib/condenser/processors/js_analyzer.rb', line 12
def call(environment, input)
seek(0)
@sourcefile = input[:source_file]
@source = input[:source]
@stack = [:main]
input[:export_dependencies] ||= []
scan_until(/\A(\/\/[^\n]*(\n|\z))*/)
if matched
directives = matched.split(/\n/).map { |l| l.delete_prefix("//").strip }
directives.each do |directive|
if directive.start_with?('depends_on')
input[:process_dependencies] << directive.sub(/\Adepends_on\s+/, '')
end
end
end
last_postion = nil
while !eos?
case @stack.last
when :tick_value
scan_until(/(\$\{|\`)/)
case matched
when '`'
@stack.pop
when '${'
@stack << :tick_statment
end
when :import
scan_until(/[\"\'\`]/)
input[:export_dependencies] << case matched
when "\""
double_quoted_value
when "'"
single_quoted_value
when '`'
tick_quoted_value
end
scan_until(/(;|\n)/)
@stack.pop
else
scan_until(/(\/\/|\/\*|\/|\(|\)|\{|\}|\"|\'|\`|export|import|\z)/)
case matched
when '//'
scan_until(/(\n|\z)/)
when '/*'
scan_until(/\*\//)
when '"'
double_quoted_value
when "'"
single_quoted_value
when '`'
@stack << :tick_value
when '/'
if match_index = @source.rindex(/(\w+|\)|\])\s*\//, @index)
match = @source.match(/(\w+|\)|\])\s*\//, match_index)
if match[0].length + match_index != @index
regex_value
end
else
regex_value
end
when '('
@stack.push :parenthesis
when ')'
raise unexptected_token(")") if @stack.last != :parenthesis
@stack.pop
when '{'
@stack.push :brackets
when '}'
case @stack.last
when :brackets, :tick_statment
@stack.pop
else
raise unexptected_token("}")
end
when 'export'
if @stack.last == :main
input[:exports] = true;
input[:default_export] = true if next_word == 'default'
end
when 'import'
if @stack.last == :main
@stack << :import
end
else
@stack.pop
end
end
if last_postion == @index
raise Condenser::SyntaxError, "Error parsing JS file with JSAnalyzer"
else
last_postion = @index
end
end
end
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#double_quoted_value ⇒ Object
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# File 'lib/condenser/processors/js_analyzer.rb', line 127
def double_quoted_value
ret_value = ""
while scan_until(/[\"\n]/)
if matched == "\n"
raise unexptected_token("\\n")
elsif matched == "\""
if pre_match[-1] != "\\"
ret_value << pre_match
return ret_value
else
ret_value << pre_match << "\\\""
end
else
ret_value << match
end
end
end
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#regex_value ⇒ Object
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# File 'lib/condenser/processors/js_analyzer.rb', line 176
def regex_value
ret_value = ""
while scan_until(/\//)
if matched == "/" && pre_match[-1] != "\\"
ret_value << pre_match
return ret_value
else
ret_value << pre_match
end
end
end
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#single_quoted_value ⇒ Object
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# File 'lib/condenser/processors/js_analyzer.rb', line 148
def single_quoted_value
ret_value = ""
while scan_until(/[\'\n]/)
if matched == "\n"
raise unexptected_token("\\n")
elsif matched == "\'" && pre_match[-1] != "\\"
ret_value << pre_match
return ret_value
else
ret_value << pre_match
end
end
end
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#tick_quoted_value ⇒ Object
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# File 'lib/condenser/processors/js_analyzer.rb', line 163
def tick_quoted_value
ret_value = ""
while scan_until(/[\`]/)
if matched == "\`" && pre_match[-1] != "\\"
ret_value << pre_match
return ret_value
else
ret_value << pre_match
end
end
end
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#unexptected_token(token) ⇒ Object
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# File 'lib/condenser/processors/js_analyzer.rb', line 115
def unexptected_token(token)
start = (@source.rindex("\n", @old_index) || 0) + 1
uptop = @source.index("\n", @index) || (@old_index + @matched.length)
lineno = @source[0..start].count("\n") + 1
message = "Unexpected token #{token} #{@sourcefile} #{lineno.to_s.rjust(4)}:#{(@index-start)}"
message << "\n#{lineno.to_s.rjust(4)}: " << @source[start..uptop]
message << "\n #{'-'* (@index-1-start)}#{'^'*(@matched.length)}"
message << "\n"
Condenser::SyntaxError.new(message)
end
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