# Copyright 2013 Google, Inc. All Rights Reserved.
#
# Google Author(s): Behdad Esfahbod
"""GUI font inspector.
"""
from __future__ import print_function, division, absolute_import
from fontTools.misc.py23 import *
from fontTools import misc, ttLib, cffLib
import pygtk
pygtk.require('2.0')
import gtk
import sys
class Row(object):
def __init__(self, parent, index, key, value, font):
self._parent = parent
self._index = index
self._key = key
self._value = value
self._font = font
if isinstance(value, ttLib.TTFont):
self._add_font(value)
return
if not isinstance(value, basestring):
# Try sequences
is_sequence = True
try:
len(value)
iter(value)
# It's hard to differentiate list-type sequences
# from dict-type ones. Try fetching item 0.
value[0]
except (TypeError, AttributeError, KeyError, IndexError):
is_sequence = False
if is_sequence:
self._add_list(key, value)
return
if hasattr(value, '__dict__'):
self._add_object(key, value)
return
if hasattr(value, 'items'):
self._add_dict(key, value)
return
if isinstance(value, basestring):
self._value_str = '"'+value+'"'
self._children = []
return
# Everything else
self._children = []
def _filter_items(self):
items = []
for k,v in self._items:
if isinstance(v, ttLib.TTFont):
continue
if k in ['reader', 'file', 'tableTag', 'compileStatus', 'recurse']:
continue
if isinstance(k, basestring) and k[0] == '_':
continue
items.append((k,v))
self._items = items
def _add_font(self, font):
self._items = [(tag,font[tag]) for tag in font.keys()]
def _add_object(self, key, value):
# Make sure item is decompiled
try:
value["asdf"]
except (AttributeError, KeyError, TypeError, ttLib.TTLibError):
pass
if isinstance(value, ttLib.getTableModule('glyf').Glyph):
# Glyph type needs explicit expanding to be useful
value.expand(self._font['glyf'])
if isinstance(value, misc.psCharStrings.T2CharString):
try:
value.decompile()
except TypeError: # Subroutines can't be decompiled
pass
if isinstance(value, cffLib.BaseDict):
for k in value.rawDict.keys():
getattr(value, k)
if isinstance(value, cffLib.Index):
# Load all items
for i in range(len(value)):
value[i]
# Discard offsets as should not be needed anymore
if hasattr(value, 'offsets'):
del value.offsets
self._value_str = value.__class__.__name__
if isinstance(value, ttLib.tables.DefaultTable.DefaultTable):
self._value_str += ' (%d Bytes)' % self._font.reader.tables[key].length
self._items = sorted(value.__dict__.items())
self._filter_items()
def _add_dict(self, key, value):
self._value_str = '%s of %d items' % (value.__class__.__name__, len(value))
self._items = sorted(value.items())
def _add_list(self, key, value):
if len(value) and len(value) <= 32:
self._value_str = str(value)
else:
self._value_str = '%s of %d items' % (value.__class__.__name__,
len(value))
self._items = list(enumerate(value))
def __len__(self):
if hasattr(self, '_children'):
return len(self._children)
if hasattr(self, '_items'):
return len(self._items)
assert False
def _ensure_children(self):
if hasattr(self, '_children'):
return
children = []
for i,(k,v) in enumerate(self._items):
children.append(Row(self, i, k, v, self._font))
self._children = children
del self._items
def __getitem__(self, n):
if n >= len(self):
return None
if not hasattr(self, '_children'):
self._children = [None] * len(self)
c = self._children[n]
if c is None:
k,v = self._items[n]
c = self._children[n] = Row(self, n, k, v, self._font)
self._items[n] = None
return c
def get_parent(self):
return self._parent
def get_index(self):
return self._index
def get_key(self):
return self._key
def get_value(self):
return self._value
def get_value_str(self):
if hasattr(self,'_value_str'):
return self._value_str
return str(self._value)
class FontTreeModel(gtk.GenericTreeModel):
__gtype_name__ = 'FontTreeModel'
def __init__(self, font):
super(FontTreeModel, self).__init__()
self._columns = (str, str)
self.font = font
self._root = Row(None, 0, "font", font, font)
def on_get_flags(self):
return 0
def on_get_n_columns(self):
return len(self._columns)
def on_get_column_type(self, index):
return self._columns[index]
def on_get_iter(self, path):
rowref = self._root
while path:
rowref = rowref[path[0]]
path = path[1:]
return rowref
def on_get_path(self, rowref):
path = []
while rowref != self._root:
path.append(rowref.get_index())
rowref = rowref.get_parent()
path.reverse()
return tuple(path)
def on_get_value(self, rowref, column):
if column == 0:
return rowref.get_key()
else:
return rowref.get_value_str()
def on_iter_next(self, rowref):
return rowref.get_parent()[rowref.get_index() + 1]
def on_iter_children(self, rowref):
return rowref[0]
def on_iter_has_child(self, rowref):
return bool(len(rowref))
def on_iter_n_children(self, rowref):
return len(rowref)
def on_iter_nth_child(self, rowref, n):
if not rowref: rowref = self._root
return rowref[n]
def on_iter_parent(self, rowref):
return rowref.get_parent()
class Inspect(object):
def _delete_event(self, widget, event, data=None):
gtk.main_quit()
return False
def __init__(self, fontfile):
self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
self.window.set_title("%s - pyftinspect" % fontfile)
self.window.connect("delete_event", self._delete_event)
self.window.set_size_request(400, 600)
self.scrolled_window = gtk.ScrolledWindow()
self.window.add(self.scrolled_window)
self.font = ttLib.TTFont(fontfile, lazy=True)
self.treemodel = FontTreeModel(self.font)
self.treeview = gtk.TreeView(self.treemodel)
#self.treeview.set_reorderable(True)
for i in range(2):
col_name = ('Key', 'Value')[i]
col = gtk.TreeViewColumn(col_name)
col.set_sort_column_id(-1)
self.treeview.append_column(col)
cell = gtk.CellRendererText()
col.pack_start(cell, True)
col.add_attribute(cell, 'text', i)
self.treeview.set_search_column(1)
self.scrolled_window.add(self.treeview)
self.window.show_all()
def main(args):
if len(args) < 1:
print("usage: pyftinspect font...", file=sys.stderr)
sys.exit(1)
for arg in args:
Inspect(arg)
gtk.main()
if __name__ == "__main__":
main(sys.argv[1:])