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File Content: `easy_xml.py`

# Copyright (c) 2011 Google Inc. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

import re
import os
import locale
from functools import reduce


def XmlToString(content, encoding='utf-8', pretty=False):
  """ Writes the XML content to disk, touching the file only if it has changed.

  Visual Studio files have a lot of pre-defined structures.  This function makes
  it easy to represent these structures as Python data structures, instead of
  having to create a lot of function calls.

  Each XML element of the content is represented as a list composed of:
  1. The name of the element, a string,
  2. The attributes of the element, a dictionary (optional), and
  3+. The content of the element, if any.  Strings are simple text nodes and
      lists are child elements.

  Example 1:
      <test/>
  becomes
      ['test']

  Example 2:
      <myelement a='value1' b='value2'>
         <childtype>This is</childtype>
         <childtype>it!</childtype>
      </myelement>

  becomes
      ['myelement', {'a':'value1', 'b':'value2'},
         ['childtype', 'This is'],
         ['childtype', 'it!'],
      ]

  Args:
    content:  The structured content to be converted.
    encoding: The encoding to report on the first XML line.
    pretty: True if we want pretty printing with indents and new lines.

  Returns:
    The XML content as a string.
  """
  # We create a huge list of all the elements of the file.
  xml_parts = ['<?xml version="1.0" encoding="%s"?>' % encoding]
  if pretty:
    xml_parts.append('\n')
  _ConstructContentList(xml_parts, content, pretty)

  # Convert it to a string
  return ''.join(xml_parts)


def _ConstructContentList(xml_parts, specification, pretty, level=0):
  """ Appends the XML parts corresponding to the specification.

  Args:
    xml_parts: A list of XML parts to be appended to.
    specification:  The specification of the element.  See EasyXml docs.
    pretty: True if we want pretty printing with indents and new lines.
    level: Indentation level.
  """
  # The first item in a specification is the name of the element.
  if pretty:
    indentation = '  ' * level
    new_line = '\n'
  else:
    indentation = ''
    new_line = ''
  name = specification[0]
  if not isinstance(name, str):
    raise Exception('The first item of an EasyXml specification should be '
                    'a string.  Specification was ' + str(specification))
  xml_parts.append(indentation + '<' + name)

  # Optionally in second position is a dictionary of the attributes.
  rest = specification[1:]
  if rest and isinstance(rest[0], dict):
    for at, val in sorted(rest[0].items()):
      xml_parts.append(' %s="%s"' % (at, _XmlEscape(val, attr=True)))
    rest = rest[1:]
  if rest:
    xml_parts.append('>')
    all_strings = reduce(lambda x, y: x and isinstance(y, str), rest, True)
    multi_line = not all_strings
    if multi_line and new_line:
      xml_parts.append(new_line)
    for child_spec in rest:
      # If it's a string, append a text node.
      # Otherwise recurse over that child definition
      if isinstance(child_spec, str):
       xml_parts.append(_XmlEscape(child_spec))
      else:
        _ConstructContentList(xml_parts, child_spec, pretty, level + 1)
    if multi_line and indentation:
      xml_parts.append(indentation)
    xml_parts.append('</%s>%s' % (name, new_line))
  else:
    xml_parts.append('/>%s' % new_line)


def WriteXmlIfChanged(content, path, encoding='utf-8', pretty=False,
                      win32=False):
  """ Writes the XML content to disk, touching the file only if it has changed.

  Args:
    content:  The structured content to be written.
    path: Location of the file.
    encoding: The encoding to report on the first line of the XML file.
    pretty: True if we want pretty printing with indents and new lines.
  """
  xml_string = XmlToString(content, encoding, pretty)
  if win32 and os.linesep != '\r\n':
    xml_string = xml_string.replace('\n', '\r\n')

  default_encoding = locale.getdefaultlocale()[1]
  if default_encoding.upper() != encoding.upper():
    xml_string = xml_string.encode(encoding)

  # Get the old content
  try:
    f = open(path, 'r')
    existing = f.read()
    f.close()
  except:
    existing = None

  # It has changed, write it
  if existing != xml_string:
    f = open(path, 'wb')
    f.write(xml_string)
    f.close()


_xml_escape_map = {
    '"': '&quot;',
    "'": '&apos;',
    '<': '&lt;',
    '>': '&gt;',
    '&': '&amp;',
    '\n': '&#xA;',
    '\r': '&#xD;',
}


_xml_escape_re = re.compile(
    "(%s)" % "|".join(map(re.escape, _xml_escape_map.keys())))


def _XmlEscape(value, attr=False):
  """ Escape a string for inclusion in XML."""
  def replace(match):
    m = match.string[match.start() : match.end()]
    # don't replace single quotes in attrs
    if attr and m == "'":
      return m
    return _xml_escape_map[m]
  return _xml_escape_re.sub(replace, value)

Name	Size	Permission
generator	---	0755
MSVSNew.py	11936 bytes	0644
MSVSProject.py	6387 bytes	0644
MSVSSettings.py	45169 bytes	0644
MSVSSettings_test.py	66111 bytes	0644
MSVSToolFile.py	1804 bytes	0644
MSVSUserFile.py	5086 bytes	0644
MSVSUtil.py	9533 bytes	0644
MSVSVersion.py	17433 bytes	0644
__init__.py	22393 bytes	0644
common.py	21073 bytes	0644
common_test.py	1964 bytes	0644
easy_xml.py	4990 bytes	0644
easy_xml_test.py	3327 bytes	0644
flock_tool.py	1747 bytes	0644
input.py	116375 bytes	0644
input_test.py	3185 bytes	0644
mac_tool.py	23441 bytes	0644
msvs_emulation.py	47881 bytes	0644
ninja_syntax.py	5536 bytes	0644
simple_copy.py	1333 bytes	0644
win_tool.py	13028 bytes	0644
xcode_emulation.py	66410 bytes	0644
xcode_ninja.py	10568 bytes	0644
xcodeproj_file.py	120483 bytes	0644
xml_fix.py	2174 bytes	0644

File Content: easy_xml.py

File Content: `easy_xml.py`