Current File : //lib/python3/dist-packages/reportlab/lib/fonts.py
#! /usr/bin/python3
#Copyright ReportLab Europe Ltd. 2000-2017
#see license.txt for license details
#history https://hg.reportlab.com/hg-public/reportlab/log/tip/src/reportlab/lib/fonts.py
__version__='3.3.0'
__doc__='''Utilities to associate bold and italic versions of fonts into families
Bold, italic and plain fonts are usually implemented in separate disk files;
but non-trivial apps want <b>this</b> to do the right thing. We therefore
need to keep 'mappings' between the font family name and the right group
of up to 4 implementation fonts to use.
Most font-handling code lives in pdfbase, and this probably should too.
'''
###############################################################################
# A place to put useful font stuff
###############################################################################
#
# Font Mappings
# The brute force approach to finding the correct postscript font name;
# much safer than the rule-based ones we tried.
# preprocessor to reduce font face names to the shortest list
# possible. Add any aliases you wish; it keeps looking up
# until it finds no more translations to do. Any input
# will be lowercased before checking.
_family_alias = {
'serif':'times',
'sansserif':'helvetica',
'monospaced':'courier',
'arial':'helvetica'
}
#maps a piddle font to a postscript one.
_tt2ps_map = {
#face, bold, italic -> ps name
('times', 0, 0) :'Times-Roman',
('times', 1, 0) :'Times-Bold',
('times', 0, 1) :'Times-Italic',
('times', 1, 1) :'Times-BoldItalic',
('courier', 0, 0) :'Courier',
('courier', 1, 0) :'Courier-Bold',
('courier', 0, 1) :'Courier-Oblique',
('courier', 1, 1) :'Courier-BoldOblique',
('helvetica', 0, 0) :'Helvetica',
('helvetica', 1, 0) :'Helvetica-Bold',
('helvetica', 0, 1) :'Helvetica-Oblique',
('helvetica', 1, 1) :'Helvetica-BoldOblique',
# there is only one Symbol font
('symbol', 0, 0) :'Symbol',
('symbol', 1, 0) :'Symbol',
('symbol', 0, 1) :'Symbol',
('symbol', 1, 1) :'Symbol',
# ditto for dingbats
('zapfdingbats', 0, 0) :'ZapfDingbats',
('zapfdingbats', 1, 0) :'ZapfDingbats',
('zapfdingbats', 0, 1) :'ZapfDingbats',
('zapfdingbats', 1, 1) :'ZapfDingbats',
}
_ps2tt_map={}
for k in sorted(_tt2ps_map.keys()):
v = _tt2ps_map[k].lower()
if v not in _ps2tt_map:
_ps2tt_map[v] = k
v = k[0].lower()
if v not in _ps2tt_map:
_ps2tt_map[v] = k
def ps2tt(psfn):
'ps fontname to family name, bold, italic'
psfn = psfn.lower()
if psfn in _ps2tt_map:
return _ps2tt_map[psfn]
raise ValueError("Can't map determine family/bold/italic for %s" % psfn)
def tt2ps(fn,b,i):
'family name + bold & italic to ps font name'
K = (fn.lower(),b,i)
if K in _tt2ps_map:
return _tt2ps_map[K]
else:
fn, b1, i1 = ps2tt(K[0])
K = fn, b1|b, i1|i
if K in _tt2ps_map:
return _tt2ps_map[K]
raise ValueError("Can't find concrete font for family=%s, bold=%d, italic=%d" % (fn, b, i))
def addMapping(face, bold, italic, psname):
'allow a custom font to be put in the mapping'
k = face.lower(), bold, italic
_tt2ps_map[k] = psname
_ps2tt_map[psname.lower()] = k
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