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lazy parse scripts

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This commit is contained in:
Lex Berezhny 2019-03-18 23:25:00 -04:00
parent 80b65ae7e7
commit 9281bdb61b
1 changed files with 20 additions and 9 deletions
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29
torba/client/basescript.py
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@ -284,19 +284,30 @@ class Template:
class Script:
__slots__ = 'source', 'template', 'values'
__slots__ = 'source', '_template', '_values', '_template_hint'
templates: List[Template] = []
def __init__(self, source=None, template=None, values=None, template_hint=None):
self.source = source
self.template = template
self.values = values
if source:
self.parse(template_hint)
elif template and values:
self._template = template
self._values = values
self._template_hint = template_hint
if source is None and template and values:
self.generate()
@property
def template(self):
if self._template is None:
self.parse(self._template_hint)
return self._template
@property
def values(self):
if self._values is None:
self.parse(self._template_hint)
return self._values
@property
def tokens(self):
return tokenize(BCDataStream(self.source))
@ -311,15 +322,15 @@ class Script:
if not template:
continue
try:
self.values = template.parse(tokens)
self.template = template
self._values = template.parse(tokens)
self._template = template
return
except ParseError:
continue
raise ValueError('No matching templates for source: {}'.format(hexlify(self.source)))
def generate(self):
self.source = self.template.generate(self.values)
self.source = self.template.generate(self._values)
class BaseInputScript(Script):