diff options
Diffstat (limited to 'mako/runtime.py')
| -rw-r--r-- | mako/runtime.py | 183 |
1 files changed, 117 insertions, 66 deletions
diff --git a/mako/runtime.py b/mako/runtime.py index 769541c..8c4f78c 100644 --- a/mako/runtime.py +++ b/mako/runtime.py @@ -7,10 +7,13 @@ """provides runtime services for templates, including Context, Namespace, and various helper functions.""" -from mako import exceptions, util, compat -from mako.compat import compat_builtins import sys +from mako import compat +from mako import exceptions +from mako import util +from mako.compat import compat_builtins + class Context(object): @@ -34,18 +37,19 @@ class Context(object): # "capture" function which proxies to the # generic "capture" function - self._data['capture'] = compat.partial(capture, self) + self._data["capture"] = compat.partial(capture, self) # "caller" stack used by def calls with content - self.caller_stack = self._data['caller'] = CallerStack() + self.caller_stack = self._data["caller"] = CallerStack() def _set_with_template(self, t): self._with_template = t illegal_names = t.reserved_names.intersection(self._data) if illegal_names: raise exceptions.NameConflictError( - "Reserved words passed to render(): %s" % - ", ".join(illegal_names)) + "Reserved words passed to render(): %s" + % ", ".join(illegal_names) + ) @property def lookup(self): @@ -177,14 +181,13 @@ class Context(object): c = self._copy() x = c._data - x.pop('self', None) - x.pop('parent', None) - x.pop('next', None) + x.pop("self", None) + x.pop("parent", None) + x.pop("next", None) return c class CallerStack(list): - def __init__(self): self.nextcaller = None @@ -231,6 +234,7 @@ class Undefined(object): def __bool__(self): return False + UNDEFINED = Undefined() STOP_RENDERING = "" @@ -342,7 +346,6 @@ class LoopContext(object): class _NSAttr(object): - def __init__(self, parent): self.__parent = parent @@ -373,9 +376,15 @@ class Namespace(object): """ - def __init__(self, name, context, - callables=None, inherits=None, - populate_self=True, calling_uri=None): + def __init__( + self, + name, + context, + callables=None, + inherits=None, + populate_self=True, + calling_uri=None, + ): self.name = name self.context = context self.inherits = inherits @@ -473,9 +482,12 @@ class Namespace(object): if key in self.context.namespaces: return self.context.namespaces[key] else: - ns = TemplateNamespace(uri, self.context._copy(), - templateuri=uri, - calling_uri=self._templateuri) + ns = TemplateNamespace( + uri, + self.context._copy(), + templateuri=uri, + calling_uri=self._templateuri, + ) self.context.namespaces[key] = ns return ns @@ -518,7 +530,7 @@ class Namespace(object): def _populate(self, d, l): for ident in l: - if ident == '*': + if ident == "*": for (k, v) in self._get_star(): d[k] = v else: @@ -536,8 +548,8 @@ class Namespace(object): val = getattr(self.inherits, key) else: raise AttributeError( - "Namespace '%s' has no member '%s'" % - (self.name, key)) + "Namespace '%s' has no member '%s'" % (self.name, key) + ) setattr(self, key, val) return val @@ -546,9 +558,17 @@ class TemplateNamespace(Namespace): """A :class:`.Namespace` specific to a :class:`.Template` instance.""" - def __init__(self, name, context, template=None, templateuri=None, - callables=None, inherits=None, - populate_self=True, calling_uri=None): + def __init__( + self, + name, + context, + template=None, + templateuri=None, + callables=None, + inherits=None, + populate_self=True, + calling_uri=None, + ): self.name = name self.context = context self.inherits = inherits @@ -556,8 +576,7 @@ class TemplateNamespace(Namespace): self.callables = dict([(c.__name__, c) for c in callables]) if templateuri is not None: - self.template = _lookup_template(context, templateuri, - calling_uri) + self.template = _lookup_template(context, templateuri, calling_uri) self._templateuri = self.template.module._template_uri elif template is not None: self.template = template @@ -566,9 +585,9 @@ class TemplateNamespace(Namespace): raise TypeError("'template' argument is required.") if populate_self: - lclcallable, lclcontext = \ - _populate_self_namespace(context, self.template, - self_ns=self) + lclcallable, lclcontext = _populate_self_namespace( + context, self.template, self_ns=self + ) @property def module(self): @@ -607,6 +626,7 @@ class TemplateNamespace(Namespace): def get(key): callable_ = self.template._get_def_callable(key) return compat.partial(callable_, self.context) + for k in self.template.module._exports: yield (k, get(k)) @@ -621,8 +641,8 @@ class TemplateNamespace(Namespace): else: raise AttributeError( - "Namespace '%s' has no member '%s'" % - (self.name, key)) + "Namespace '%s' has no member '%s'" % (self.name, key) + ) setattr(self, key, val) return val @@ -631,9 +651,16 @@ class ModuleNamespace(Namespace): """A :class:`.Namespace` specific to a Python module instance.""" - def __init__(self, name, context, module, - callables=None, inherits=None, - populate_self=True, calling_uri=None): + def __init__( + self, + name, + context, + module, + callables=None, + inherits=None, + populate_self=True, + calling_uri=None, + ): self.name = name self.context = context self.inherits = inherits @@ -641,7 +668,7 @@ class ModuleNamespace(Namespace): self.callables = dict([(c.__name__, c) for c in callables]) mod = __import__(module) - for token in module.split('.')[1:]: + for token in module.split(".")[1:]: mod = getattr(mod, token) self.module = mod @@ -657,7 +684,7 @@ class ModuleNamespace(Namespace): for key in self.callables: yield (key, self.callables[key]) for key in dir(self.module): - if key[0] != '_': + if key[0] != "_": callable_ = getattr(self.module, key) if compat.callable(callable_): yield key, compat.partial(callable_, self.context) @@ -672,8 +699,8 @@ class ModuleNamespace(Namespace): val = getattr(self.inherits, key) else: raise AttributeError( - "Namespace '%s' has no member '%s'" % - (self.name, key)) + "Namespace '%s' has no member '%s'" % (self.name, key) + ) setattr(self, key, val) return val @@ -692,6 +719,7 @@ def supports_caller(func): return func(context, *args, **kwargs) finally: context.caller_stack._pop_frame() + return wrap_stackframe @@ -721,13 +749,16 @@ def _decorate_toplevel(fn): def go(context, *args, **kw): def y(*args, **kw): return render_fn(context, *args, **kw) + try: y.__name__ = render_fn.__name__[7:] except TypeError: # < Python 2.4 pass return fn(y)(context, *args, **kw) + return go + return decorate_render @@ -737,7 +768,9 @@ def _decorate_inline(context, fn): def go(*args, **kw): return dec(context, *args, **kw) + return go + return decorate_render @@ -747,8 +780,8 @@ def _include_file(context, uri, calling_uri, **kwargs): template = _lookup_template(context, uri, calling_uri) (callable_, ctx) = _populate_self_namespace( - context._clean_inheritance_tokens(), - template) + context._clean_inheritance_tokens(), template + ) kwargs = _kwargs_for_include(callable_, context._data, **kwargs) if template.include_error_handler: try: @@ -769,23 +802,25 @@ def _inherit_from(context, uri, calling_uri): if uri is None: return None template = _lookup_template(context, uri, calling_uri) - self_ns = context['self'] + self_ns = context["self"] ih = self_ns while ih.inherits is not None: ih = ih.inherits - lclcontext = context._locals({'next': ih}) - ih.inherits = TemplateNamespace("self:%s" % template.uri, - lclcontext, - template=template, - populate_self=False) - context._data['parent'] = lclcontext._data['local'] = ih.inherits - callable_ = getattr(template.module, '_mako_inherit', None) + lclcontext = context._locals({"next": ih}) + ih.inherits = TemplateNamespace( + "self:%s" % template.uri, + lclcontext, + template=template, + populate_self=False, + ) + context._data["parent"] = lclcontext._data["local"] = ih.inherits + callable_ = getattr(template.module, "_mako_inherit", None) if callable_ is not None: ret = callable_(template, lclcontext) if ret: return ret - gen_ns = getattr(template.module, '_mako_generate_namespaces', None) + gen_ns = getattr(template.module, "_mako_generate_namespaces", None) if gen_ns is not None: gen_ns(context) return (template.callable_, lclcontext) @@ -795,8 +830,9 @@ def _lookup_template(context, uri, relativeto): lookup = context._with_template.lookup if lookup is None: raise exceptions.TemplateLookupException( - "Template '%s' has no TemplateLookup associated" % - context._with_template.uri) + "Template '%s' has no TemplateLookup associated" + % context._with_template.uri + ) uri = lookup.adjust_uri(uri, relativeto) try: return lookup.get_template(uri) @@ -806,11 +842,14 @@ def _lookup_template(context, uri, relativeto): def _populate_self_namespace(context, template, self_ns=None): if self_ns is None: - self_ns = TemplateNamespace('self:%s' % template.uri, - context, template=template, - populate_self=False) - context._data['self'] = context._data['local'] = self_ns - if hasattr(template.module, '_mako_inherit'): + self_ns = TemplateNamespace( + "self:%s" % template.uri, + context, + template=template, + populate_self=False, + ) + context._data["self"] = context._data["local"] = self_ns + if hasattr(template.module, "_mako_inherit"): ret = template.module._mako_inherit(template, context) if ret: return ret @@ -829,13 +868,19 @@ def _render(template, callable_, args, data, as_unicode=False): buf = util.FastEncodingBuffer( as_unicode=as_unicode, encoding=template.output_encoding, - errors=template.encoding_errors) + errors=template.encoding_errors, + ) context = Context(buf, **data) context._outputting_as_unicode = as_unicode context._set_with_template(template) - _render_context(template, callable_, context, *args, - **_kwargs_for_callable(callable_, data)) + _render_context( + template, + callable_, + context, + *args, + **_kwargs_for_callable(callable_, data) + ) return context._pop_buffer().getvalue() @@ -849,7 +894,7 @@ def _kwargs_for_callable(callable_, data): namedargs = argspec[0] + [v for v in argspec[1:3] if v is not None] kwargs = {} for arg in namedargs: - if arg != 'context' and arg in data and arg not in kwargs: + if arg != "context" and arg in data and arg not in kwargs: kwargs[arg] = data[arg] return kwargs @@ -858,13 +903,14 @@ def _kwargs_for_include(callable_, data, **kwargs): argspec = compat.inspect_func_args(callable_) namedargs = argspec[0] + [v for v in argspec[1:3] if v is not None] for arg in namedargs: - if arg != 'context' and arg in data and arg not in kwargs: + if arg != "context" and arg in data and arg not in kwargs: kwargs[arg] = data[arg] return kwargs def _render_context(tmpl, callable_, context, *args, **kwargs): import mako.template as template + # create polymorphic 'self' namespace for this # template with possibly updated context if not isinstance(tmpl, template.DefTemplate): @@ -886,8 +932,9 @@ def _exec_template(callable_, context, args=None, kwargs=None): be interpreted here. """ template = context._with_template - if template is not None and \ - (template.format_exceptions or template.error_handler): + if template is not None and ( + template.format_exceptions or template.error_handler + ): try: callable_(context, *args, **kwargs) except Exception: @@ -908,11 +955,15 @@ def _render_error(template, context, error): error_template = exceptions.html_error_template() if context._outputting_as_unicode: context._buffer_stack[:] = [ - util.FastEncodingBuffer(as_unicode=True)] + util.FastEncodingBuffer(as_unicode=True) + ] else: - context._buffer_stack[:] = [util.FastEncodingBuffer( - error_template.output_encoding, - error_template.encoding_errors)] + context._buffer_stack[:] = [ + util.FastEncodingBuffer( + error_template.output_encoding, + error_template.encoding_errors, + ) + ] context._set_with_template(error_template) error_template.render_context(context, error=error) |