appstore2.py 文件源码

def get_icon(self, doc):
        try:
            full_icon_file_name = self.db.get_iconname(doc)
            icon_file_name = split_icon_ext(full_icon_file_name)
            if icon_file_name:
                icon_name = icon_file_name
                if icon_name in self.icon_cache:
                    return self.icon_cache[icon_name]
                # icons.load_icon takes between 0.001 to 0.01s on my
                # machine, this is a significant burden because get_value
                # is called *a lot*. caching is the only option

                # look for the icon on the iconpath
                if self.icons.has_icon(icon_name):
                    icon = self.icons.load_icon(icon_name, self.icon_size, 0)
                    if icon:
                        self.icon_cache[icon_name] = icon
                        return icon
                elif self.db.get_icon_download_url(doc):
                    url = self.db.get_icon_download_url(doc)
                    self._download_icon_and_show_when_ready(
                        url,
                        self.get_pkgname(doc),
                        full_icon_file_name)
                    # display the missing icon while the real one downloads
                    self.icon_cache[icon_name] = self.missing_icon
        except GObject.GError as e:
            LOG.debug("get_icon returned '%s'" % e)
        return self.missing_icon