Class: Temple::Filters::ControlFlow

Inherits:
Temple::Filter show all
Defined in:
lib/temple/filters/control_flow.rb

Overview

Control flow filter which processes [:if, condition, yes-exp, no-exp] and [:block, code, content] expressions. This is useful for ruby code generation with lots of conditionals.

Constant Summary

Constants included from Utils

Utils::ESCAPE_HTML, Utils::ESCAPE_HTML_PATTERN

Instance Attribute Summary

Attributes included from Mixins::Options

#options

Instance Method Summary collapse

Methods included from Mixins::Options

included, #initialize

Methods included from Mixins::EscapeDispatcher

#on_escape

Methods included from Mixins::CoreDispatcher

#on_capture, #on_multi

Methods included from Mixins::CompiledDispatcher

#call, #compile

Methods included from Utils

#empty_exp?, #escape_html, #escape_html_safe, #indent_dynamic, #unique_name

Instance Method Details

#on_block(code, exp) ⇒ Object 



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# File 'lib/temple/filters/control_flow.rb', line 35

def on_block(code, exp)
  [:multi,
   [:code, code],
   compile(exp),
   [:code, 'end']]
end

#on_case(arg, *cases) ⇒ Object 



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# File 'lib/temple/filters/control_flow.rb', line 21

def on_case(arg, *cases)
  result = [:multi, [:code, arg ? "case (#{arg})" : 'case']]
  cases.map do |c|
    condition, exp = c
    result << [:code, condition == :else ? 'else' : "when #{condition}"] << compile(exp)
  end
  result << [:code, 'end']
  result
end

#on_cond(*cases) ⇒ Object 



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# File 'lib/temple/filters/control_flow.rb', line 31

def on_cond(*cases)
  on_case(nil, *cases)
end

#on_if(condition, yes, no = nil) ⇒ Object 



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# File 'lib/temple/filters/control_flow.rb', line 10

def on_if(condition, yes, no = nil)
  result = [:multi, [:code, "if #{condition}"], compile(yes)]
  while no && no.first == :if
    result << [:code, "elsif #{no[1]}"] << compile(no[2])
    no = no[3]
  end
  result << [:code, 'else'] << compile(no) if no
  result << [:code, 'end']
  result
end