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1# Copyright 2013 Google, Inc. All Rights Reserved.
2#
3# Google Author(s): Behdad Esfahbod
4
5"""GUI font inspector.
6"""
7
8from __future__ import print_function, division, absolute_import
9from fontTools.misc.py23 import *
10from fontTools import misc, ttLib, cffLib
11import pygtk
12pygtk.require('2.0')
13import gtk
14import sys
15
16
17
18class Row(object):
19	def __init__(self, parent, index, key, value, font):
20		self._parent = parent
21		self._index = index
22		self._key = key
23		self._value = value
24		self._font = font
25
26		if isinstance(value, ttLib.TTFont):
27			self._add_font(value)
28			return
29
30		if not isinstance(value, basestring):
31			# Try sequences
32			is_sequence = True
33			try:
34				len(value)
35				iter(value)
36				# It's hard to differentiate list-type sequences
37				# from dict-type ones.  Try fetching item 0.
38				value[0]
39			except (TypeError, AttributeError, KeyError, IndexError):
40				is_sequence = False
41			if is_sequence:
42				self._add_list(key, value)
43				return
44		if hasattr(value, '__dict__'):
45			self._add_object(key, value)
46			return
47		if hasattr(value, 'items'):
48			self._add_dict(key, value)
49			return
50
51		if isinstance(value, basestring):
52			self._value_str = '"'+value+'"'
53			self._children = []
54			return
55
56		# Everything else
57		self._children = []
58
59	def _filter_items(self):
60		items = []
61		for k,v in self._items:
62			if isinstance(v, ttLib.TTFont):
63				continue
64			if k in ['reader', 'file', 'tableTag', 'compileStatus', 'recurse']:
65				continue
66			if isinstance(k, basestring) and k[0] == '_':
67				continue
68			items.append((k,v))
69		self._items = items
70
71	def _add_font(self, font):
72		self._items = [(tag,font[tag]) for tag in font.keys()]
73
74	def _add_object(self, key, value):
75		# Make sure item is decompiled
76		try:
77			value["asdf"]
78		except (AttributeError, KeyError, TypeError, ttLib.TTLibError):
79			pass
80		if isinstance(value, ttLib.getTableModule('glyf').Glyph):
81			# Glyph type needs explicit expanding to be useful
82			value.expand(self._font['glyf'])
83		if isinstance(value, misc.psCharStrings.T2CharString):
84			try:
85				value.decompile()
86			except TypeError:  # Subroutines can't be decompiled
87				pass
88		if isinstance(value, cffLib.BaseDict):
89			for k in value.rawDict.keys():
90				getattr(value, k)
91		if isinstance(value, cffLib.Index):
92			# Load all items
93			for i in range(len(value)):
94				value[i]
95			# Discard offsets as should not be needed anymore
96			if hasattr(value, 'offsets'):
97				del value.offsets
98
99		self._value_str = value.__class__.__name__
100		if isinstance(value, ttLib.tables.DefaultTable.DefaultTable):
101			self._value_str += ' (%d Bytes)' % self._font.reader.tables[key].length
102		self._items = sorted(value.__dict__.items())
103		self._filter_items()
104
105	def _add_dict(self, key, value):
106		self._value_str = '%s of %d items' % (value.__class__.__name__, len(value))
107		self._items = sorted(value.items())
108
109	def _add_list(self, key, value):
110		if len(value) and len(value) <= 32:
111			self._value_str = str(value)
112		else:
113			self._value_str = '%s of %d items' % (value.__class__.__name__,
114							      len(value))
115		self._items = list(enumerate(value))
116
117	def __len__(self):
118		if hasattr(self, '_children'):
119			return len(self._children)
120		if hasattr(self, '_items'):
121			return len(self._items)
122		assert False
123
124	def _ensure_children(self):
125		if hasattr(self, '_children'):
126			return
127		children = []
128		for i,(k,v) in enumerate(self._items):
129			children.append(Row(self, i, k, v, self._font))
130		self._children = children
131		del self._items
132
133	def __getitem__(self, n):
134		if n >= len(self):
135			return None
136		if not hasattr(self, '_children'):
137			self._children = [None] * len(self)
138		c = self._children[n]
139		if c is None:
140			k,v = self._items[n]
141			c = self._children[n] = Row(self, n, k, v, self._font)
142			self._items[n] = None
143		return c
144
145	def get_parent(self):
146		return self._parent
147
148	def get_index(self):
149		return self._index
150
151	def get_key(self):
152		return self._key
153
154	def get_value(self):
155		return self._value
156
157	def get_value_str(self):
158		if hasattr(self,'_value_str'):
159			return self._value_str
160		return str(self._value)
161
162class FontTreeModel(gtk.GenericTreeModel):
163
164	__gtype_name__ = 'FontTreeModel'
165
166	def __init__(self, font):
167		super(FontTreeModel, self).__init__()
168		self._columns = (str, str)
169		self.font = font
170		self._root = Row(None, 0, "font", font, font)
171
172	def on_get_flags(self):
173		return 0
174
175	def on_get_n_columns(self):
176		return len(self._columns)
177
178	def on_get_column_type(self, index):
179		return self._columns[index]
180
181	def on_get_iter(self, path):
182		rowref = self._root
183		while path:
184			rowref = rowref[path[0]]
185			path = path[1:]
186		return rowref
187
188	def on_get_path(self, rowref):
189		path = []
190		while rowref != self._root:
191			path.append(rowref.get_index())
192			rowref = rowref.get_parent()
193		path.reverse()
194		return tuple(path)
195
196	def on_get_value(self, rowref, column):
197		if column == 0:
198			return rowref.get_key()
199		else:
200			return rowref.get_value_str()
201
202	def on_iter_next(self, rowref):
203		return rowref.get_parent()[rowref.get_index() + 1]
204
205	def on_iter_children(self, rowref):
206		return rowref[0]
207
208	def on_iter_has_child(self, rowref):
209		return bool(len(rowref))
210
211	def on_iter_n_children(self, rowref):
212		return len(rowref)
213
214	def on_iter_nth_child(self, rowref, n):
215		if not rowref: rowref = self._root
216		return rowref[n]
217
218	def on_iter_parent(self, rowref):
219		return rowref.get_parent()
220
221class Inspect(object):
222
223	def _delete_event(self, widget, event, data=None):
224		gtk.main_quit()
225		return False
226
227	def __init__(self, fontfile):
228
229		self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
230		self.window.set_title("%s - pyftinspect" % fontfile)
231		self.window.connect("delete_event", self._delete_event)
232		self.window.set_size_request(400, 600)
233
234		self.scrolled_window = gtk.ScrolledWindow()
235		self.window.add(self.scrolled_window)
236
237		self.font = ttLib.TTFont(fontfile, lazy=True)
238		self.treemodel = FontTreeModel(self.font)
239		self.treeview = gtk.TreeView(self.treemodel)
240		#self.treeview.set_reorderable(True)
241
242		for i in range(2):
243			col_name = ('Key', 'Value')[i]
244			col = gtk.TreeViewColumn(col_name)
245			col.set_sort_column_id(-1)
246			self.treeview.append_column(col)
247
248			cell = gtk.CellRendererText()
249			col.pack_start(cell, True)
250			col.add_attribute(cell, 'text', i)
251
252		self.treeview.set_search_column(1)
253		self.scrolled_window.add(self.treeview)
254		self.window.show_all()
255
256def main(args):
257	if len(args) < 1:
258		print("usage: pyftinspect font...", file=sys.stderr)
259		sys.exit(1)
260	for arg in args:
261		Inspect(arg)
262	gtk.main()
263
264if __name__ == "__main__":
265	main(sys.argv[1:])
266