Class: Spider::TemplateBlocks::AttrIf

Inherits:
Block show all
Defined in:
lib/spiderfw/templates/blocks/attr_if.rb

Overview

sp:attr-if  Adds an attribute if a condition holds Example:

<div sp:attr-if="@my_condition,class,coolDiv"></div>

The attribute’s value can be a scene variable, but not an expression: so

<div sp:attr-if"@my_condition,attr_name,@attr_value" /> is valid, but
<div sp:attr-if"@my_condition,attr_name,@attr_value_start+@attr_value_end" /> is not

Instance Attribute Summary

Attributes inherited from Block

#allowed_blocks, #doctype, #el, #template

Instance Method Summary collapse

Methods inherited from Block

#compile_content, #compile_text, #escape_text, #get_following, #initialize, #inspect, #parse_content, var_to_scene, #var_to_scene, #vars_to_scene, vars_to_scene

Constructor Details

This class inherits a constructor from Spider::TemplateBlocks::Block

Instance Method Details

#compile(options = {}) ⇒ Object 



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# File 'lib/spiderfw/templates/blocks/attr_if.rb', line 15

def compile(options={})
    init = ""
    attr_if = @el.get_attribute('sp:attr-if')
    @el.remove_attribute('sp:attr-if')
    @el.set_attribute("tmp-attr-if", '---')
    compiled = Spider::TemplateBlocks.parse_element(@el, @allowed_blocks, @template).compile(options)
    c, init = compiled.run_code, compiled.init_code
    cond, name, val = attr_if.split(',')
    if val && val.strip[0].chr == '@'
        val = "'+#{var_to_scene(val)}+'"
    end
    cond = vars_to_scene(cond)
    full_attr = val ? "#{name}=\"#{val}\"" : "#{name}"
    replace = "'+"+"( (#{cond}) ? '#{full_attr}' : '' )"+"+'"
#            debug("ATTR IF REPLACe")
    c.sub!('tmp-attr-if="---"', replace)
    return CompiledBlock.new(init, c)
end