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SF.net SVN: matplotlib: [4438] trunk/matplotlib/lib/matplotlib/mathtext.py
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From: <md...@us...> - 2007-11-26 14:29:52
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Revision: 4438
http://matplotlib.svn.sourceforge.net/matplotlib/?rev=4438&view=rev
Author: mdboom
Date: 2007-11-26 06:29:49 -0800 (Mon, 26 Nov 2007)
Log Message:
-----------
Minor speed improvements in mathtext. Removing trailing whitespace.
Modified Paths:
--------------
trunk/matplotlib/lib/matplotlib/mathtext.py
Modified: trunk/matplotlib/lib/matplotlib/mathtext.py
===================================================================
--- trunk/matplotlib/lib/matplotlib/mathtext.py 2007-11-26 14:10:11 UTC (rev 4437)
+++ trunk/matplotlib/lib/matplotlib/mathtext.py 2007-11-26 14:29:49 UTC (rev 4438)
@@ -210,7 +210,7 @@
class MathtextBackendBbox(MathtextBackend):
"""A backend whose only purpose is to get a precise bounding box.
Only required for the Agg backend."""
-
+
def __init__(self, real_backend):
MathtextBackend.__init__(self)
self.bbox = [0, 0, 0, 0]
@@ -221,7 +221,7 @@
min(self.bbox[1], y1),
max(self.bbox[2], x2),
max(self.bbox[3], y2)]
-
+
def render_glyph(self, ox, oy, info):
self._update_bbox(ox + info.metrics.xmin,
oy - info.metrics.ymax,
@@ -253,14 +253,14 @@
self.real_backend.fonts_object = self.fonts_object
self.real_backend.ox = self.bbox[0]
self.real_backend.oy = self.bbox[1]
-
+
class MathtextBackendAggRender(MathtextBackend):
def __init__(self):
self.ox = 0
self.oy = 0
self.image = None
MathtextBackend.__init__(self)
-
+
def set_canvas_size(self, w, h, d):
MathtextBackend.set_canvas_size(self, w, h, d)
self.image = FT2Image(ceil(w), ceil(h + d))
@@ -286,11 +286,11 @@
def MathtextBackendAgg():
return MathtextBackendBbox(MathtextBackendAggRender())
-
+
class MathtextBackendBitmapRender(MathtextBackendAggRender):
def get_results(self, box):
return self.image
-
+
def MathtextBackendBitmap():
return MathtextBackendBbox(MathtextBackendBitmapRender())
@@ -312,7 +312,7 @@
""" % locals()
self.lastfont = postscript_name, fontsize
self.pswriter.write(ps)
-
+
ps = """%(ox)f %(oy)f moveto
/%(symbol_name)s glyphshow\n
""" % locals()
@@ -428,7 +428,7 @@
"""Fix any cyclical references before the object is about
to be destroyed."""
self.used_characters = None
-
+
def get_kern(self, font1, sym1, fontsize1,
font2, sym2, fontsize2, dpi):
"""
@@ -739,7 +739,7 @@
fontmap = {}
use_cmex = True
-
+
def __init__(self, *args, **kwargs):
# This must come first so the backend's owner is set correctly
if rcParams['mathtext.fallback_to_cm']:
@@ -760,7 +760,7 @@
def _map_virtual_font(self, fontname, font_class, uniindex):
return fontname, uniindex
-
+
def _get_glyph(self, fontname, font_class, sym, fontsize):
found_symbol = False
@@ -769,7 +769,7 @@
if uniindex is not None:
fontname = 'ex'
found_symbol = True
-
+
if not found_symbol:
try:
uniindex = get_unicode_index(sym)
@@ -782,7 +782,7 @@
fontname, uniindex = self._map_virtual_font(
fontname, font_class, uniindex)
-
+
# Only characters in the "Letter" class should be italicized in 'it'
# mode. Greek capital letters should be Roman.
if found_symbol:
@@ -832,13 +832,16 @@
return [(fontname, sym)]
class StixFonts(UnicodeFonts):
+ """
+ A font handling class for the STIX fonts
+ """
_fontmap = { 'rm' : 'STIXGeneral',
'it' : 'STIXGeneralItalic',
'bf' : 'STIXGeneralBol',
'nonunirm' : 'STIXNonUni',
'nonuniit' : 'STIXNonUniIta',
'nonunibf' : 'STIXNonUniBol',
-
+
0 : 'STIXGeneral',
1 : 'STIXSiz1Sym',
2 : 'STIXSiz2Sym',
@@ -851,7 +854,6 @@
cm_fallback = False
def __init__(self, *args, **kwargs):
- self._sans = kwargs.pop("sans", False)
TruetypeFonts.__init__(self, *args, **kwargs)
if not len(self.fontmap):
for key, name in self._fontmap.iteritems():
@@ -893,14 +895,14 @@
# This will generate a dummy character
uniindex = 0x1
fontname = 'it'
-
+
# Handle private use area glyphs
if (fontname in ('it', 'rm', 'bf') and
uniindex >= 0xe000 and uniindex <= 0xf8ff):
fontname = 'nonuni' + fontname
return fontname, uniindex
-
+
_size_alternatives = {}
def get_sized_alternatives_for_symbol(self, fontname, sym):
alternatives = self._size_alternatives.get(sym)
@@ -921,7 +923,14 @@
self._size_alternatives[sym] = alternatives
return alternatives
-
+
+class StixSansFonts(StixFonts):
+ """
+ A font handling class for the STIX fonts (using sans-serif
+ characters by default).
+ """
+ _sans = True
+
class StandardPsFonts(Fonts):
"""
Use the standard postscript fonts for rendering to backend_ps
@@ -1087,7 +1096,8 @@
# Note that (as TeX) y increases downward, unlike many other parts of
# matplotlib.
-# How much text shrinks when going to the next-smallest level
+# How much text shrinks when going to the next-smallest level. GROW_FACTOR
+# must be the inverse of SHRINK_FACTOR.
SHRINK_FACTOR = 0.7
GROW_FACTOR = 1.0 / SHRINK_FACTOR
# The number of different sizes of chars to use, beyond which they will not
@@ -1162,10 +1172,16 @@
pass
class Vbox(Box):
+ """
+ A box with only height (zero width).
+ """
def __init__(self, height, depth):
Box.__init__(self, 0., height, depth)
class Hbox(Box):
+ """
+ A box with only width (zero height and depth).
+ """
def __init__(self, width):
Box.__init__(self, width, 0., 0.)
@@ -1243,8 +1259,9 @@
self.depth *= GROW_FACTOR
class Accent(Char):
- """The font metrics need to be dealt with differently for accents, since they
- are already offset correctly from the baseline in TrueType fonts."""
+ """The font metrics need to be dealt with differently for accents,
+ since they are already offset correctly from the baseline in
+ TrueType fonts."""
def _update_metrics(self):
metrics = self._metrics = self.font_output.get_metrics(
self.font, self.font_class, self.c, self.fontsize, self.dpi)
@@ -1743,7 +1760,7 @@
self.cur_s += 1
self.max_push = max(self.cur_s, self.max_push)
clamp = self.clamp
-
+
for p in box.children:
if isinstance(p, Char):
p.render(self.cur_h + self.off_h, self.cur_v + self.off_v)
@@ -1866,7 +1883,7 @@
empty = Empty()
empty.setParseAction(raise_error)
return empty
-
+
class Parser(object):
_binary_operators = Set(r'''
+ *
@@ -1924,7 +1941,7 @@
_dropsub_symbols = Set(r'''\int \oint'''.split())
_fontnames = Set("rm cal it tt sf bf default bb frak circled scr".split())
-
+
_function_names = Set("""
arccos csc ker min arcsin deg lg Pr arctan det lim sec arg dim
liminf sin cos exp limsup sinh cosh gcd ln sup cot hom log tan
@@ -1937,7 +1954,7 @@
_leftDelim = Set(r"( [ { \lfloor \langle \lceil".split())
_rightDelim = Set(r") ] } \rfloor \rangle \rceil".split())
-
+
def __init__(self):
# All forward declarations are here
font = Forward().setParseAction(self.font).setName("font")
@@ -1949,7 +1966,7 @@
self._expression = Forward().setParseAction(self.finish).setName("finish")
float = Regex(r"-?[0-9]+\.?[0-9]*")
-
+
lbrace = Literal('{').suppress()
rbrace = Literal('}').suppress()
start_group = (Optional(latexfont) + lbrace)
@@ -1995,7 +2012,7 @@
c_over_c =(Suppress(bslash)
+ oneOf(self._char_over_chars.keys())
).setParseAction(self.char_over_chars)
-
+
accent = Group(
Suppress(bslash)
+ accent
@@ -2057,7 +2074,7 @@
) | Error("Expected symbol or group")
simple <<(space
- | customspace
+ | customspace
| font
| subsuper
)
@@ -2107,11 +2124,11 @@
+ (Suppress(math_delim)
| Error("Expected end of math '$'"))
+ non_math
- )
+ )
) + StringEnd()
self._expression.enablePackrat()
-
+
self.clear()
def clear(self):
@@ -2158,7 +2175,7 @@
self.font_class = name
self._font = name
font = property(_get_font, _set_font)
-
+
def get_state(self):
return self._state_stack[-1]
@@ -2216,7 +2233,7 @@
def customspace(self, s, loc, toks):
return [self._make_space(float(toks[1]))]
-
+
def symbol(self, s, loc, toks):
# print "symbol", toks
c = toks[0]
@@ -2242,7 +2259,7 @@
# (in multiples of underline height)
r'AA' : ( ('rm', 'A', 1.0), (None, '\circ', 0.5), 0.0),
}
-
+
def char_over_chars(self, s, loc, toks):
sym = toks[0]
state = self.get_state()
@@ -2253,7 +2270,7 @@
self._char_over_chars.get(sym, (None, None, 0.0))
if under_desc is None:
raise ParseFatalException("Error parsing symbol")
-
+
over_state = state.copy()
if over_desc[0] is not None:
over_state.font = over_desc[0]
@@ -2267,19 +2284,19 @@
under = Char(under_desc[1], under_state)
width = max(over.width, under.width)
-
+
over_centered = HCentered([over])
over_centered.hpack(width, 'exactly')
under_centered = HCentered([under])
under_centered.hpack(width, 'exactly')
-
+
return Vlist([
over_centered,
Vbox(0., thickness * space),
under_centered
])
-
+
_accent_map = {
r'hat' : r'\circumflexaccent',
r'breve' : r'\combiningbreve',
@@ -2603,7 +2620,7 @@
return is width, height, fonts
"""
_parser = None
-
+
_backend_mapping = {
'Bitmap': MathtextBackendBitmap,
'Agg' : MathtextBackendAgg,
@@ -2613,6 +2630,13 @@
'Cairo' : MathtextBackendCairo
}
+ _font_type_mapping = {
+ 'cm' : BakomaFonts,
+ 'stix' : StixFonts,
+ 'stixsans' : StixSansFonts,
+ 'custom' : UnicodeFonts
+ }
+
def __init__(self, output):
self._output = output
self._cache = {}
@@ -2620,7 +2644,7 @@
def parse(self, s, dpi = 72, prop = None):
if prop is None:
prop = FontProperties()
-
+
cacheKey = (s, dpi, hash(prop))
result = self._cache.get(cacheKey)
if result is not None:
@@ -2631,16 +2655,13 @@
else:
backend = self._backend_mapping[self._output]()
fontset = rcParams['mathtext.fontset']
- if fontset == 'cm':
- font_output = BakomaFonts(prop, backend)
- elif fontset == 'stix':
- font_output = StixFonts(prop, backend)
- elif fontset == 'stixsans':
- font_output = StixFonts(prop, backend, sans=True)
- elif fontset == 'custom':
- font_output = UnicodeFonts(prop, backend)
+ fontset_class = self._font_type_mapping.get(fontset)
+ if fontset_class is not None:
+ font_output = fontset_class(prop, backend)
else:
- raise ValueError("mathtext.fontset must be either 'cm', 'stix', 'stixsans', or 'custom'")
+ raise ValueError(
+ "mathtext.fontset must be either 'cm', 'stix', "
+ "'stixsans', or 'custom'")
fontsize = prop.get_size_in_points()
@@ -2648,7 +2669,7 @@
# with each request.
if self._parser is None:
self.__class__._parser = Parser()
-
+
box = self._parser.parse(s, font_output, fontsize, dpi)
font_output.set_canvas_size(box.width, box.height, box.depth)
result = font_output.get_results(box)
@@ -2660,5 +2681,5 @@
font_output.destroy()
font_output.mathtext_backend.fonts_object = None
font_output.mathtext_backend = None
-
+
return result
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