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"""xmlWriter.py -- Simple XML authoring class"""
from fontTools.misc.textTools import byteord, strjoin, tobytes, tostr
import sys
import os
import string
INDENT = " "
class XMLWriter(object):
def __init__(self, fileOrPath, indentwhite=INDENT, idlefunc=None, encoding="utf_8",
newlinestr="\n"):
if encoding.lower().replace('-','').replace('_','') != 'utf8':
raise Exception('Only UTF-8 encoding is supported.')
if fileOrPath == '-':
fileOrPath = sys.stdout
if not hasattr(fileOrPath, "write"):
self.filename = fileOrPath
self.file = open(fileOrPath, "wb")
self._closeStream = True
else:
self.filename = None
# assume writable file object
self.file = fileOrPath
self._closeStream = False
# Figure out if writer expects bytes or unicodes
try:
# The bytes check should be first. See:
# https://github.com/fonttools/fonttools/pull/233
self.file.write(b'')
self.totype = tobytes
except TypeError:
# This better not fail.
self.file.write('')
self.totype = tostr
self.indentwhite = self.totype(indentwhite)
if newlinestr is None:
self.newlinestr = self.totype(os.linesep)
else:
self.newlinestr = self.totype(newlinestr)
self.indentlevel = 0
self.stack = []
self.needindent = 1
self.idlefunc = idlefunc
self.idlecounter = 0
self._writeraw('<?xml version="1.0" encoding="UTF-8"?>')
self.newline()
def __enter__(self):
return self
def __exit__(self, exception_type, exception_value, traceback):
self.close()
def close(self):
if self._closeStream:
self.file.close()
def write(self, string, indent=True):
"""Writes text."""
self._writeraw(escape(string), indent=indent)
def writecdata(self, string):
"""Writes text in a CDATA section."""
self._writeraw("<![CDATA[" + string + "]]>")
def write8bit(self, data, strip=False):
"""Writes a bytes() sequence into the XML, escaping
non-ASCII bytes. When this is read in xmlReader,
the original bytes can be recovered by encoding to
'latin-1'."""
self._writeraw(escape8bit(data), strip=strip)
def write_noindent(self, string):
"""Writes text without indentation."""
self._writeraw(escape(string), indent=False)
def _writeraw(self, data, indent=True, strip=False):
"""Writes bytes, possibly indented."""
if indent and self.needindent:
self.file.write(self.indentlevel * self.indentwhite)
self.needindent = 0
s = self.totype(data, encoding="utf_8")
if (strip):
s = s.strip()
self.file.write(s)
def newline(self):
self.file.write(self.newlinestr)
self.needindent = 1
idlecounter = self.idlecounter
if not idlecounter % 100 and self.idlefunc is not None:
self.idlefunc()
self.idlecounter = idlecounter + 1
def comment(self, data):
data = escape(data)
lines = data.split("\n")
self._writeraw("<!-- " + lines[0])
for line in lines[1:]:
self.newline()
self._writeraw(" " + line)
self._writeraw(" -->")
def simpletag(self, _TAG_, *args, **kwargs):
attrdata = self.stringifyattrs(*args, **kwargs)
data = "<%s%s/>" % (_TAG_, attrdata)
self._writeraw(data)
def begintag(self, _TAG_, *args, **kwargs):
attrdata = self.stringifyattrs(*args, **kwargs)
data = "<%s%s>" % (_TAG_, attrdata)
self._writeraw(data)
self.stack.append(_TAG_)
self.indent()
def endtag(self, _TAG_):
assert self.stack and self.stack[-1] == _TAG_, "nonmatching endtag"
del self.stack[-1]
self.dedent()
data = "</%s>" % _TAG_
self._writeraw(data)
def dumphex(self, data):
linelength = 16
hexlinelength = linelength * 2
chunksize = 8
for i in range(0, len(data), linelength):
hexline = hexStr(data[i:i+linelength])
line = ""
white = ""
for j in range(0, hexlinelength, chunksize):
line = line + white + hexline[j:j+chunksize]
white = " "
self._writeraw(line)
self.newline()
def indent(self):
self.indentlevel = self.indentlevel + 1
def dedent(self):
assert self.indentlevel > 0
self.indentlevel = self.indentlevel - 1
def stringifyattrs(self, *args, **kwargs):
if kwargs:
assert not args
attributes = sorted(kwargs.items())
elif args:
assert len(args) == 1
attributes = args[0]
else:
return ""
data = ""
for attr, value in attributes:
if not isinstance(value, (bytes, str)):
value = str(value)
data = data + ' %s="%s"' % (attr, escapeattr(value))
return data
def escape(data):
data = tostr(data, 'utf_8')
data = data.replace("&", "&")
data = data.replace("<", "<")
data = data.replace(">", ">")
data = data.replace("\r", " ")
return data
def escapeattr(data):
data = escape(data)
data = data.replace('"', """)
return data
def escape8bit(data):
"""Input is Unicode string."""
def escapechar(c):
n = ord(c)
if 32 <= n <= 127 and c not in "<&>":
return c
else:
return "&#" + repr(n) + ";"
return strjoin(map(escapechar, data.decode('latin-1')))
def hexStr(s):
h = string.hexdigits
r = ''
for c in s:
i = byteord(c)
r = r + h[(i >> 4) & 0xF] + h[i & 0xF]
return r
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