#
#    Metrix++, Copyright 2009-2019, Metrix++ Project
#    Link: https://github.com/metrixplusplus/metrixplusplus
#    
#    This file is a part of Metrix++ Tool.
#    

import mpp.api

class Plugin(mpp.api.Plugin, mpp.api.Child, mpp.api.IConfigurable):
    
    def declare_configuration(self, parser):
        parser.add_option("--std.code.length.total", "--sclent", action="store_true", default=False,
                         help="Enables collection of size metric (in number of symbols per region) [default: %default]")
    
    def configure(self, options):
        self.is_active = options.__dict__['std.code.length.total']
        
    def initialize(self):
        fields = []
        if self.is_active == True:
            fields.append(self.Field('total', int))
        mpp.api.Plugin.initialize(self, fields=fields)
        
        if len(fields) != 0:
            self.subscribe_by_parents_interface(mpp.api.ICode)

    def callback(self, parent, data, is_updated):
        is_updated = is_updated or self.is_updated
        if is_updated == True:
            for region in data.iterate_regions():
                size = 0
                start_pos = region.get_offset_begin()
                for sub_id in region.iterate_subregion_ids():
                    # exclude sub regions, like enclosed classes
                    size += data.get_region(sub_id).get_offset_begin() - start_pos
                    start_pos = data.get_region(sub_id).get_offset_end()
                size += region.get_offset_end() - start_pos
                region.set_data(self.get_name(), 'total', size)