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# Copyright 2015 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""
Generator that produces an interface file for the Closure Compiler.
Note: This is a work in progress, and generated interfaces may require tweaking.
"""
from code_util import Code
from js_util import JsUtil
from model import *
from schema_util import *
import os
import sys
import re
class JsInterfaceGenerator(object):
def Generate(self, namespace):
return _Generator(namespace).Generate()
class _Generator(object):
def __init__(self, namespace):
self._namespace = namespace
first = namespace.name[0].upper()
rest = namespace.name[1:]
self._interface = first + rest
self._js_util = JsUtil()
def Generate(self):
"""Generates a Code object with the schema for the entire namespace.
"""
c = Code()
(c.Append(self._GetHeader(sys.argv[0], self._namespace.name))
.Append())
self._AppendInterfaceObject(c)
c.Append()
c.Sblock('%s.prototype = {' % self._interface)
for function in self._namespace.functions.values():
self._AppendFunction(c, function)
c.TrimTrailingNewlines()
c.Eblock('};')
c.Append()
for event in self._namespace.events.values():
self._AppendEvent(c, event)
c.TrimTrailingNewlines()
return c
def _GetHeader(self, tool, namespace):
"""Returns the file header text.
"""
return (
self._js_util.GetLicense() + '\n' + self._js_util.GetInfo(tool) + '\n' +
('/** @fileoverview Interface for %s that can be overriden. */' %
namespace))
def _AppendInterfaceObject(self, c):
"""Appends the code creating the interface object.
For example:
/** @interface */
function SettingsPrivate() {}
"""
(c.Append('/** @interface */')
.Append('function %s() {}' % self._interface))
def _AppendFunction(self, c, function):
"""Appends the inteface for a function, including a JSDoc comment.
"""
if function.deprecated:
return
def getParamNames(f):
names = []
for param in f.params:
names.append(param.name)
# TODO(https://crbug.com/1142991) Update this to represent promises
# better, rather than just appended as a callback param.
if f.returns_async:
names.append(f.returns_async.name)
return names
self._js_util.AppendFunctionJsDoc(c, self._namespace.name, function)
c.Append('%s: function(%s) {},' % (function.name, ', '.join(
getParamNames(function))))
c.Append()
def _AppendEvent(self, c, event):
"""Appends the interface for an event.
"""
c.Sblock(line='/**', line_prefix=' * ')
if (event.description):
c.Comment(event.description, comment_prefix='')
c.Append('@type {!ChromeEvent}')
self._js_util.AppendSeeLink(c, self._namespace.name, 'event', event.name)
c.Eblock(' */')
c.Append('%s.prototype.%s;' % (self._interface, event.name))
c.Append()
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