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Use dpi info when converting lengths to pixels. Fixes #101

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This commit is contained in:
Kovid Goyal 2007-06-08 05:07:31 +00:00
parent eefa7ec259
commit dd3c14b0f1
1 changed files with 20 additions and 20 deletions
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40
src/libprs500/ebooks/lrf/html/convert_from.py
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@ -51,12 +51,12 @@ class Span(_Span):
@staticmethod
def unit_convert(val, ref=80):
def unit_convert(val, dpi, ref=80):
"""
Tries to convert html units stored in C{val} to pixels. C{ref} contains
the reference value for relative units. Returns the number of pixels
(an int) if successful. Otherwise, returns None.
Assumes: 1 pixel is 1/4 mm. One em is 10pts
Tries to convert html units stored in C{val} to pixels.
@param ref: reference size in pixels for % units.
@return: The number of pixels (an int) if successful. Otherwise, returns None.
Assumes: One em is 10pts
"""
result = None
m = re.match("\s*(-*[0-9]*\.?[0-9]*)\s*(%|em|px|mm|cm|in|pt|pc)", val)
@ -67,21 +67,21 @@ class Span(_Span):
elif m.group(2) == 'px':
result = int(unit)
elif m.group(2) == 'in':
result = int(unit * 25.4 * 4)
result = int(unit * dpi)
elif m.group(2) == 'pt':
result = int(unit * 25.4 * 4 / 72)
result = int(unit * dpi/72.)
elif m.group(2)== 'em':
result = int(unit * 25.4 * 4 / 72 * 10)
result = int(unit * (dpi/72.) * 10)
elif m.group(2)== 'pc':
result = int(unit * 25.4 * 4 / 72 * 12)
result = int(unit * (dpi/72.) * 12)
elif m.group(2)== 'mm':
result = int(unit * 4)
result = int(unit * 0.04 * (dpi/72.))
elif m.group(2)== 'cm':
result = int(unit * 10 * 4)
result = int(unit * 0.4 * (dpi/72.))
return result
@staticmethod
def translate_attrs(d, font_delta=0, memory=None):
def translate_attrs(d, dpi, font_delta=0, memory=None):
"""
Receives a dictionary of html attributes and styles and returns
approximate Xylog equivalents in a new dictionary
@ -106,10 +106,10 @@ class Span(_Span):
def font_size(val):
ans = None
unit = Span.unit_convert(val, 14)
unit = Span.unit_convert(val, dpi, 14)
if unit:
# Assume a 10 pt font (14 pixels) has fontsize 100
ans = int (unit / 14.0 * 100)
ans = int(unit * (72./dpi) * 10)
else:
if "xx-small" in val:
ans = 40
@ -171,7 +171,7 @@ class Span(_Span):
print >>sys.stderr, 'Unhandled/malformed CSS key:', key, d[key]
return t
def __init__(self, ns, css, memory, font_delta=0):
def __init__(self, ns, css, memory, dpi, font_delta=0):
src = ns.string if hasattr(ns, 'string') else ns
src = re.sub(r'\s{2,}', ' ', src) # Remove multiple spaces
for pat, repl in Span.rules:
@ -182,7 +182,7 @@ class Span(_Span):
fs = css.pop('font-style')
if fs.lower() == 'italic':
src = Italic(src)
attrs = Span.translate_attrs(css, font_delta=font_delta, memory=memory)
attrs = Span.translate_attrs(css, dpi, font_delta=font_delta, memory=memory)
if 'fontsize' in attrs.keys():
attrs['baselineskip'] = int(attrs['fontsize']) + 20
_Span.__init__(self, text=src, **attrs)
@ -685,7 +685,7 @@ class HTMLConverter(object):
self.process_alignment(css)
try:
self.current_para.append(Span(src, self.sanctify_css(css), self.memory,\
font_delta=self.font_delta))
self.profile.dpi, font_delta=self.font_delta))
except ConversionError, err:
if self.verbose:
print >>sys.stderr, err
@ -941,7 +941,7 @@ class HTMLConverter(object):
elif tagname == 'pre':
self.end_current_para()
self.current_block.append_to(self.current_page)
attrs = Span.translate_attrs(tag_css, self.font_delta, self.memory)
attrs = Span.translate_attrs(tag_css, self.profile.dpi, self.font_delta, self.memory)
ts = self.book.create_text_style(**self.unindented_style.attrs)
ts.attrs.update(attrs)
self.current_block = self.book.create_text_block(
@ -951,7 +951,7 @@ class HTMLConverter(object):
lines = src.split('\n')
for line in lines:
try:
self.current_para.append(Span(line, tag_css, self.memory))
self.current_para.append(Span(line, tag_css, self.memory, self.profile.dpi))
self.current_para.CR()
except ConversionError:
pass
@ -1015,7 +1015,7 @@ class HTMLConverter(object):
self.end_current_para()
self.lstrip_toggle = True
if tag_css.has_key('text-indent'):
indent = Span.unit_convert(tag_css['text-indent'])
indent = Span.unit_convert(tag_css['text-indent'], self.profile.dpi)
if not indent:
indent=0
else: