Class: FWI::Generator::JS

Inherits:
Object
  • Object
show all
Defined in:
lib/fwi/compilers/js/gen.rb

Instance Method Summary collapse

Instance Method Details

#_func_util(obj, member, mode) ⇒ Object 



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# File 'lib/fwi/compilers/js/gen.rb', line 8

def _func_util obj, member, mode
    type = member[:type]
    internal_type = type.to_s
    internal_type = "child" if type == :reference && member[:element_type] == :block
    internal_type = "u8" if type == :reference && member[:element_type] == :enum
    
    param = member[:array].nil? ? "" : "index#{mode == :setter ? ', ' : ''}"
    custom_getter = member[:attribute_map]["getter"]
    custom_setter = member[:attribute_map]["setter"]
    custom_length = member[:attribute_map]["length_func"]

    func_name = nil
    func_sig = nil
    if mode == :setter
        func_name = custom_setter.nil? ? "set_#{member[:name]}" : custom_setter
        func_sig = "function(#{param}value) {"
    elsif mode == :getter
        func_name = custom_getter.nil? ? "get_#{member[:name]}" : custom_getter
        func_sig = "function(#{param}) {"
    elsif mode == :length
        func_name = custom_length.nil? ? "#{member[:name]}_length" : custom_length
        func_sig = "function(#{param}) {"
    end

    index = member[:index]
    index = "#{index} + (#{member[:typesize]} * index)" unless member[:array].nil?
    { :internal_type => internal_type, :index => index, :func_name => func_name, :func_sig => func_sig }
end

#_get_for_file(bitmap, file) ⇒ Object 



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# File 'lib/fwi/compilers/js/gen.rb', line 151

def _get_for_file bitmap, file
    map = { :members => {}, :type => :namespace }
    bitmap[:members].each do |name, member|
        if member[:type] == :namespace
            ret = _get_for_file member, file
            map[:members][name] = ret unless ret[:members].empty?
        else
            map[:members][name] = member if member[:file] == file
        end
    end
    map
end

#append(buffer, indent, string) ⇒ Object 



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# File 'lib/fwi/compilers/js/gen.rb', line 4

def append buffer, indent, string
    string.split(/\n/).each { |y| buffer << ("\t" * indent) + y + "\n" }
end

#gen(bitmap) ⇒ Object 



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# File 'lib/fwi/compilers/js/gen.rb', line 164

def gen bitmap
    map = {}
    bitmap[:files].each do |name, file|
        filename = name.sub ".fwi", ".js"
        contents = "(function() {\n"

        gen_for_ns("<root>", "<root>", _get_for_file(bitmap, name), contents, 1)

        contents += "})();"
        map[filename] = contents
    end
    map
end

#gen_for_ns(parent, name, ns, str, indent) ⇒ Object 



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# File 'lib/fwi/compilers/js/gen.rb', line 104

def gen_for_ns parent, name, ns, str, indent
    is_root = name == "<root>"
    has_parent = parent != "<root>"

    fqn_ns = name
    fqn_ns = parent + "." + fqn_ns if has_parent

    unless has_parent
        append str, indent, "var #{name} = FWI.util.exports().#{fqn_ns} || {};" unless is_root
    else
        append str, indent, "#{fqn_ns} = FWI.util.exports().#{fqn_ns} || {};" unless is_root
    end
    
    unless is_root
        append(str, indent, "FWI.util.exports().#{fqn_ns} = #{fqn_ns};")
    end

    ns[:members].each do |el_name, element|
        fqn = fqn_ns + "." + el_name
        fqn = el_name if is_root
        type_decl = is_root ? "var #{fqn}" : "#{fqn}"

        if element[:type] == :namespace
            gen_for_ns(fqn_ns, el_name, element, str, indent);
        elsif element[:type] == :block
            append str, indent, type_decl + " = FWI.block(\"#{fqn}\", #{element[:size]});"
            element[:members].each do |mem|
                gen_prototype(fqn, mem, str, indent)
            end
        elsif element[:type] == :enum
            maps = element[:members].map do |e|
                "#{e[:name]}: #{e[:val]},"
            end
            maps.last.sub!(",","")
            append str, indent, type_decl + " = {"
            maps.each do |m|
                append str, indent+1, m
            end
            append str, indent, "};"
        end
        
        if is_root && element[:type] != :namespace
            append(str, indent, "FWI.util.exports().#{fqn} = #{fqn};")
        end
    end
end

#gen_prototype(obj, member, str, indent) ⇒ Object 



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# File 'lib/fwi/compilers/js/gen.rb', line 92

def gen_prototype obj, member, str, indent
    write_getter obj, member, str, indent
    if member[:type] == :reference
        if member[:element_type] == :enum
            write_setter obj, member, str, indent
        end
    else
        write_setter obj, member, str, indent
        write_length(obj, member, str, indent)if member[:type] == :string
    end
end

#write_getter(obj, member, str, indent) ⇒ Object 



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# File 'lib/fwi/compilers/js/gen.rb', line 37

def write_getter obj, member, str, indent
    return "" if member[:attributes].include? "no-getter"
    util = _func_util(obj, member, :getter)

    fullfunc = obj + ".prototype." + util[:func_name] + " = " + util[:func_sig]
    append(str, indent, fullfunc)
    type = member[:type]
    if type == :reference && member[:element_type] == :block
        type = member[:element_name].gsub("::", ".")
        append(str, indent + 1, "return this.get_child(#{type}, #{util[:index]});")
    elsif type == :bool
        if member[:array].nil?
            append(str, indent + 1, "return this.get_bool(#{util[:index]}, #{member[:bit_index]});")
        else
            append(str, indent + 1, "return this.get_bool(#{member[:index]} + index / 8, index % 8);")
        end
    elsif type == :string
        append(str, indent + 1, "return this.get_string(#{util[:index]}, #{member[:size]});")
    else
        append(str, indent + 1, "return this.get_#{util[:internal_type]}(#{util[:index]});")
    end
    append(str, indent, "};")
end

#write_length(obj, member, str, indent) ⇒ Object 



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# File 'lib/fwi/compilers/js/gen.rb', line 82

def write_length obj, member, str, indent
    return "" if member[:attributes].include? "no-len"
    util = _func_util(obj, member, :length)

    fullfunc = obj + ".prototype." + util[:func_name] + " = " + util[:func_sig]
    append(str, indent, fullfunc)
    append(str, indent + 1, "return #{member[:size]};")
    append(str, indent, "};")
end

#write_setter(obj, member, str, indent) ⇒ Object 



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# File 'lib/fwi/compilers/js/gen.rb', line 61

def write_setter obj, member, str, indent
    return "" if member[:attributes].include? "no-setter"
    util = _func_util(obj, member, :setter)
    
    fullfunc = obj + ".prototype." + util[:func_name] + " = " + util[:func_sig]
    append(str, indent, fullfunc)
    type = member[:type]
    if type == :bool
        if member[:array].nil?
            append(str, indent + 1, "this.set_bool(#{util[:index]}, #{member[:bit_index]}, value);")
        else
            append(str, indent + 1, "this.set_bool(#{member[:index]} + index / 8, index % 8, value);")
        end
    elsif type == :string
        append(str, indent + 1, "this.set_string(#{util[:index]}, value, value.length);")
    else
        append(str, indent + 1, "this.set_#{util[:internal_type]}(#{util[:index]}, value);")
    end
    append(str, indent, "};")
end