Class: General::GPlaceholder

Inherits:
GPartial show all
Defined in:
lib/gpartials/gplaceholder.rb

Overview

Created: 7 - 1 - 2016

Constant Summary collapse

REGEX =

Regular expression that matches placeholders

/@\(\s*#{NAME}\s*#{DEFAULT}?\s*(#{OPERATION}\s*#{ARGUMENTS}?)?\s*\)/

Instance Attribute Summary

Attributes inherited from GPartial

#name

Instance Method Summary collapse

Constructor Details

#initialize(match, defaults) ⇒ GPlaceholder

Initializes the GPlaceholder with the given match

Parameter: match - the match data from the string being parsed Parameter: defaults - the hash of default data from the GTemplate



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# File 'lib/gpartials/gplaceholder.rb', line 44

def initialize match, defaults
	super match, defaults
	@operation = match[:operation]
	if match[:arguments]
		@arguments = match[:arguments].gsub(ARGUMENT).collect { |arg|
			ARGUMENT.match(arg)[:text]
		}
	else
		@arguments = []
	end
	@defaults = defaults
	@defaults[@name] = match[:default] unless @defaults.has_key? @name
end

Instance Method Details

#apply(data) ⇒ Object

Returns the value of the placeholder in the given data with the given operation performed on it

Parameter: data - the data being applied

Return: the value of the placeholder in the given data with the given operation performed on it



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# File 'lib/gpartials/gplaceholder.rb', line 65

def apply data
	# Get value from either data or defaults
	if data.has_key? @name
		value = data[@name]
	else
		value = @defaults[@name]
	end

	# Return value (operation performed if one is defined)
	return (@operation ? General::GOperations.send(@operation, value, *@arguments) : value).to_s
end

#regex(first = true) ⇒ Object

Returns the string as a regex

Parameter: first - true if the placeholder is the first of its kind in the GTemplate

Returns: the string as a regex



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# File 'lib/gpartials/gplaceholder.rb', line 82

def regex(first=true); first ? "(?<#{@name.to_s}>.*)" : "\\k<#{@name.to_s}>"; end

#string(first = true) ⇒ Object

Returns the string representation of the placeholder

Parameter: first - true if the placeholder is the first of its kind in the GTemplate

Return: the string representation of the placeholder



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# File 'lib/gpartials/gplaceholder.rb', line 89

def string first=true
	str = "@(#{@name}"
	if first
		if @defaults[@name]
			str += ": #{@defaults[@name]}"
		end
		if @operation
			str += " -> #{@operation}"
			unless @arguments.empty?
				str += @arguments.collect {|s| " \"#{s}\""}.join
			end
		end
	end
	return str + ")"
end