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# xml_emitter.py
#
# Copyright 2021 James Westman <james@jwestman.net>
#
# This file is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as
# published by the Free Software Foundation; either version 3 of the
# License, or (at your option) any later version.
#
# This file is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# SPDX-License-Identifier: LGPL-3.0-or-later
import typing as T
from xml.sax import saxutils
from blueprintcompiler.gir import GirType
from blueprintcompiler.language.types import ClassName
class XmlEmitter:
def __init__(self, indent=2, generated_notice=True):
self.indent = indent
self.result = '<?xml version="1.0" encoding="UTF-8"?>'
if generated_notice:
self.result += (
"\n"
"<!--\n"
"DO NOT EDIT!\n"
"This file was @generated by blueprint-compiler. Instead, edit the\n"
"corresponding .blp file and regenerate this file with blueprint-compiler.\n"
"-->"
)
self._tag_stack = []
self._needs_newline = False
def start_tag(
self, tag, **attrs: T.Union[str, GirType, ClassName, bool, None, float]
):
self._indent()
self.result += f"<{tag}"
for key, val in attrs.items():
if val is not None:
self.result += f' {key.replace("_", "-")}="{saxutils.escape(self._to_string(val))}"'
self.result += ">"
self._tag_stack.append(tag)
self._needs_newline = False
def put_self_closing(self, tag, **attrs):
self._indent()
self.result += f"<{tag}"
for key, val in attrs.items():
if val is not None:
self.result += f' {key.replace("_", "-")}="{saxutils.escape(self._to_string(val))}"'
self.result += "/>"
self._needs_newline = True
def end_tag(self):
tag = self._tag_stack.pop()
if self._needs_newline:
self._indent()
self.result += f"</{tag}>"
self._needs_newline = True
def put_text(self, text: T.Union[str, int, float]):
self.result += saxutils.escape(str(text))
self._needs_newline = False
def put_cdata(self, text: str):
text = text.replace("]]>", "]]]]><![CDATA[>")
self.result += f"<![CDATA[{text}]]>"
self._needs_newline = False
def _indent(self):
if self.indent is not None:
self.result += "\n" + " " * (self.indent * len(self._tag_stack))
def _to_string(self, val):
if isinstance(val, GirType):
return val.glib_type_name
elif isinstance(val, ClassName):
return val.glib_type_name
else:
return str(val)
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