def len_as_printed(s, format='latex'):
r"""
Returns the length of s, as it will appear after being math_jax'ed
"""
lenq = 1
lendig = 1
lenpm = 1.5
lenpar = 0.5
lenexp = 0.75
lensub = 0.75
## remove all html first since it is not displayed
ss = re.sub("<[^>]*>", "", s)
logger.debug("ss=%s" % ss)
ss = re.sub(" ", "", ss) # remove white-space
ss = re.sub("\*", "", ss) # remove *
num_exp = s.count("^") # count number of exponents
exps = re.findall("\^{?(\d*)", s) # a list of all exponents
sexps = "".join(exps)
num_subs = s.count("_") # count number of exponents
subs = re.findall("_{?(\d*)", s) # a list of all subscripts
ssubs = "".join(subs)
ss = re.sub("\^{?(\d*)}?", "", ss) # remove exponenents
logger.debug(join([ss, ssubs, sexps]))
tot_len = (ss.count(")") + ss.count("(")) * lenpar
tot_len += ss.count("q") * lenq
tot_len += len(re.findall("\d", s)) * lendig
tot_len += len(re.findall("\w", s)) * lenq
tot_len += (s.count("+") + s.count("-")) * lenpm
tot_len += num_subs * lensub
tot_len += num_exp * lenexp
#
#tot_len = len(ss)+ceil((len(ssubs)+len(sexps))*0.67)
return tot_len
def len_as_printed(s,format='latex'):
r"""
Returns the length of s, as it will appear after being math_jax'ed
"""
lenq=1
lendig=1
lenpm=1.5
lenpar=0.5
lenexp=0.75
lensub=0.75
## remove all html first since it is not displayed
ss = re.sub("<[^>]*>","",s)
logger.debug("ss=%s" % ss)
ss = re.sub(" ","",ss) # remove white-space
ss = re.sub("\*","",ss) # remove *
num_exp = s.count("^") # count number of exponents
exps = re.findall("\^{?(\d*)",s) # a list of all exponents
sexps = "".join(exps)
num_subs = s.count("_") # count number of exponents
subs = re.findall("_{?(\d*)",s) # a list of all subscripts
ssubs = "".join(subs)
ss = re.sub("\^{?(\d*)}?","",ss) # remove exponenents
logger.debug(join([ss,ssubs,sexps]))
tot_len=(ss.count(")")+ss.count("("))*lenpar
tot_len+=ss.count("q")*lenq
tot_len+=len(re.findall("\d",s))*lendig
tot_len+=len(re.findall("\w",s))*lenq
tot_len+=(s.count("+")+s.count("-"))*lenpm
tot_len+=num_subs*lensub
tot_len+=num_exp*lenexp
#
#tot_len = len(ss)+ceil((len(ssubs)+len(sexps))*0.67)
return tot_len
def break_line_at(s, brpt=20):
r"""
Breaks a line containing math 'smartly' at brpt characters.
With smartly we mean that we break at + or - but keep brackets
together
"""
sl = list()
stmp = ''
left_par = 0
#wmf_logger.debug('Break at line, Input ={0}'.format(s))
for i in range(len(s)):
if s[i] == '(': # go to the matching case
left_par = 1
elif s[i] == ')' and left_par == 1:
left_par = 0
if left_par == 0 and (s[i] == '+' or s[i] == '-'):
sl.append(stmp)
stmp = ''
stmp = stmp + s[i]
if i == len(s) - 1:
sl.append(stmp)
wmf_logger.debug('sl={0}'.format(sl))
# sl now contains a split e.g. into terms in the q-expansion
# we now have to join as many as fits on the line
res = list()
stmp = ''
for j in range(len(sl)):
l = len_as_printed(stmp) + len_as_printed(sl[j])
#wmf_logger.debug("l={0}".format(l))
if l < brpt:
stmp = join([stmp, sl[j]])
else:
res.append(stmp)
stmp = sl[j]
if j == len(sl) - 1:
res.append(stmp)
return res
