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[print-json] Towards valid json syntax

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This commit is contained in:
Behdad Esfahbod 2022-08-15 21:34:30 -06:00
parent dcff7a2d8b
commit f8e5ea4f95
1 changed files with 37 additions and 8 deletions
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45
Snippets/print-json.py
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@ -4,14 +4,15 @@ from fontTools.misc.textTools import Tag
class JsonVisitor(TTVisitor): class JsonVisitor(TTVisitor):
def _open(self, s): def _open(self, s):
print(s, file=self.file) print(s, file=self.file)
self._indent += self.indent self._indent += self.indent
self.comma = False
def _close(self, s): def _close(self, s):
self._indent = self._indent[:-len(self.indent)] self._indent = self._indent[: -len(self.indent)]
print("%s%s," % (self._indent, s), file=self.file) print("\n%s%s" % (self._indent, s), end="", file=self.file)
self.comma = True
def __init__(self, file, indent=" "): def __init__(self, file, indent=" "):
self.file = file self.file = file
@ -21,32 +22,57 @@ class JsonVisitor(TTVisitor):
def visitObject(self, obj): def visitObject(self, obj):
self._open("{") self._open("{")
super().visitObject(obj) super().visitObject(obj)
print('%s"type": "%s"' % (self._indent, obj.__class__.__name__), file=self.file) if self.comma:
print(",", end="", file=self.file)
print(
'\n%s"type": "%s"' % (self._indent, obj.__class__.__name__),
end="",
file=self.file,
)
self._close("}") self._close("}")
def visitAttr(self, obj, attr, value): def visitAttr(self, obj, attr, value):
if self.comma:
print(",", file=self.file)
print('%s"%s": ' % (self._indent, attr), end="", file=self.file) print('%s"%s": ' % (self._indent, attr), end="", file=self.file)
self.visit(value) self.visit(value)
self.comma = True
def visitList(self, obj, *args, **kwargs): def visitList(self, obj, *args, **kwargs):
self._open("[") self._open("[")
comma = False
for value in obj: for value in obj:
if comma:
print(",", end="", file=self.file)
print(file=self.file)
print(self._indent, end="", file=self.file) print(self._indent, end="", file=self.file)
self.visit(value, *args, **kwargs) self.visit(value, *args, **kwargs)
comma = True
self._close("]") self._close("]")
def visitDict(self, obj, *args, **kwargs): def visitDict(self, obj, *args, **kwargs):
self._open("{") self._open("{")
comma = False
for key, value in obj.items(): for key, value in obj.items():
if comma:
print(",", end="", file=self.file)
print(file=self.file)
print('%s"%s": ' % (self._indent, key), end="", file=self.file) print('%s"%s": ' % (self._indent, key), end="", file=self.file)
self.visit(value, *args, **kwargs) self.visit(value, *args, **kwargs)
comma = True
self._close("}") self._close("}")
def visitLeaf(self, obj): def visitLeaf(self, obj):
if isinstance(obj, tuple): if isinstance(obj, tuple):
obj = list(obj) obj = list(obj)
if isinstance(obj, bytes): if obj is None:
s = "null"
elif obj == True:
s = "true"
elif obj == False:
s = "false"
elif isinstance(obj, bytes):
s = repr(obj) s = repr(obj)
s = s[1:] s = s[1:]
else: else:
@ -55,18 +81,21 @@ class JsonVisitor(TTVisitor):
if s[0] == "'": if s[0] == "'":
s = '"' + s[1:-1] + '"' s = '"' + s[1:-1] + '"'
print("%s," % s, file=self.file) print("%s" % s, end="", file=self.file)
@JsonVisitor.register(ttLib.TTFont) @JsonVisitor.register(ttLib.TTFont)
def visit(self, font): def visit(self, font):
if hasattr(visitor, "font"): if hasattr(visitor, "font"):
print("{}", end="", file=self.file)
return False return False
visitor.font = font visitor.font = font
self._open("{") self._open("{")
for tag in font.keys(): for tag in font.keys():
print('%s"%s": ' % (self._indent, tag), end="", file=self.file) if self.comma:
print(",", file=self.file)
print('\n%s"%s": ' % (self._indent, tag), end="", file=self.file)
visitor.visit(font[tag]) visitor.visit(font[tag])
self._close("}") self._close("}")
@ -87,7 +116,7 @@ def visit(self, obj):
@JsonVisitor.register(Tag) @JsonVisitor.register(Tag)
def visit(self, obj): def visit(self, obj):
print('"%s",' % str(obj), file=self.file) print('"%s"' % str(obj), end="", file=self.file)
return False return False