import re from rope.base import builtins from rope.base import exceptions from rope.base import libutils from rope.base import pynames from rope.base import pyobjects from rope.base import resources from rope.base import resourceobserver from rope.base import taskhandle from rope.refactor import importutils class AutoImport(object): """A class for finding the module that provides a name This class maintains a cache of global names in python modules. Note that this cache is not accurate and might be out of date. """ def __init__(self, project, observe=True, underlined=False): """Construct an AutoImport object If `observe` is `True`, listen for project changes and update the cache. If `underlined` is `True`, underlined names are cached, too. """ self.project = project self.underlined = underlined self.names = project.data_files.read_data('globalnames') if self.names is None: self.names = {} project.data_files.add_write_hook(self._write) # XXX: using a filtered observer observer = resourceobserver.ResourceObserver( changed=self._changed, moved=self._moved, removed=self._removed) if observe: project.add_observer(observer) def import_assist(self, starting): """Return a list of ``(name, module)`` tuples This function tries to find modules that have a global name that starts with `starting`. """ # XXX: breaking if gave up! use generators result = [] for module in self.names: for global_name in self.names[module]: if global_name.startswith(starting): result.append((global_name, module)) return result def get_modules(self, name): """Return the list of modules that have global `name`""" result = [] for module in self.names: if name in self.names[module]: result.append(module) return result def get_all_names(self): """Return the list of all cached global names""" result = set() for module in self.names: result.update(set(self.names[module])) return result def get_name_locations(self, name): """Return a list of ``(resource, lineno)`` tuples""" result = [] for module in self.names: if name in self.names[module]: try: pymodule = self.project.get_module(module) if name in pymodule: pyname = pymodule[name] module, lineno = pyname.get_definition_location() if module is not None: resource = module.get_module().get_resource() if resource is not None and lineno is not None: result.append((resource, lineno)) except exceptions.ModuleNotFoundError: pass return result def generate_cache(self, resources=None, underlined=None, task_handle=taskhandle.NullTaskHandle()): """Generate global name cache for project files If `resources` is a list of `rope.base.resource.File`\s, only those files are searched; otherwise all python modules in the project are cached. """ if resources is None: resources = self.project.get_python_files() job_set = task_handle.create_jobset( 'Generatig autoimport cache', len(resources)) for file in resources: job_set.started_job('Working on <%s>' % file.path) self.update_resource(file, underlined) job_set.finished_job() def generate_modules_cache(self, modules, underlined=None, task_handle=taskhandle.NullTaskHandle()): """Generate global name cache for modules listed in `modules`""" job_set = task_handle.create_jobset( 'Generatig autoimport cache for modules', len(modules)) for modname in modules: job_set.started_job('Working on <%s>' % modname) if modname.endswith('.*'): mod = self.project.find_module(modname[:-2]) if mod: for sub in submodules(mod): self.update_resource(sub, underlined) else: self.update_module(modname, underlined) job_set.finished_job() def clear_cache(self): """Clear all entries in global-name cache It might be a good idea to use this function before regenerating global names. """ self.names.clear() def find_insertion_line(self, code): """Guess at what line the new import should be inserted""" match = re.search(r'^(def|class)\s+', code) if match is not None: code = code[:match.start()] try: pymodule = libutils.get_string_module(self.project, code) except exceptions.ModuleSyntaxError: return 1 testmodname = '__rope_testmodule_rope' importinfo = importutils.NormalImport(((testmodname, None),)) module_imports = importutils.get_module_imports(self.project, pymodule) module_imports.add_import(importinfo) code = module_imports.get_changed_source() offset = code.index(testmodname) lineno = code.count('\n', 0, offset) + 1 return lineno def update_resource(self, resource, underlined=None): """Update the cache for global names in `resource`""" try: pymodule = self.project.get_pymodule(resource) modname = self._module_name(resource) self._add_names(pymodule, modname, underlined) except exceptions.ModuleSyntaxError: pass def update_module(self, modname, underlined=None): """Update the cache for global names in `modname` module `modname` is the name of a module. """ try: pymodule = self.project.get_module(modname) self._add_names(pymodule, modname, underlined) except exceptions.ModuleNotFoundError: pass def _module_name(self, resource): return libutils.modname(resource) def _add_names(self, pymodule, modname, underlined): if underlined is None: underlined = self.underlined globals = [] if isinstance(pymodule, pyobjects.PyDefinedObject): attributes = pymodule._get_structural_attributes() else: attributes = pymodule.get_attributes() for name, pyname in attributes.items(): if not underlined and name.startswith('_'): continue if isinstance(pyname, (pynames.AssignedName, pynames.DefinedName)): globals.append(name) if isinstance(pymodule, builtins.BuiltinModule): globals.append(name) self.names[modname] = globals def _write(self): self.project.data_files.write_data('globalnames', self.names) def _changed(self, resource): if not resource.is_folder(): self.update_resource(resource) def _moved(self, resource, newresource): if not resource.is_folder(): modname = self._module_name(resource) if modname in self.names: del self.names[modname] self.update_resource(newresource) def _removed(self, resource): if not resource.is_folder(): modname = self._module_name(resource) if modname in self.names: del self.names[modname] def submodules(mod): if isinstance(mod, resources.File): if mod.name.endswith('.py') and mod.name != '__init__.py': return set([mod]) return set() if not mod.has_child('__init__.py'): return set() result = set([mod]) for child in mod.get_children(): result |= submodules(child) return result