def convert_dvi_to_png(dvipath, builder):
# type: (str, Builder) -> Tuple[str, int]
"""Convert DVI file to PNG image."""
tempdir = ensure_tempdir(builder)
filename = path.join(tempdir, 'math.png')
name = 'dvipng'
command = [
builder.config.imgmath_dvipng, '-o', filename, '-T', 'tight', '-z9'
]
command.extend(builder.config.imgmath_dvipng_args)
if builder.config.imgmath_use_preview:
command.append('--depth')
command.append(dvipath)
stdout, stderr = convert_dvi_to_image(command, name)
depth = None
if builder.config.imgmath_use_preview:
for line in stdout.splitlines():
matched = depth_re.match(line)
if matched:
depth = int(matched.group(1))
write_png_depth(filename, depth)
break
return filename, depth
def convert_dvi_to_png(dvipath, builder):
# type: (unicode, Builder) -> Tuple[unicode, int]
"""Convert DVI file to PNG image."""
tempdir = ensure_tempdir(builder)
filename = path.join(tempdir, 'math.png')
name = 'dvipng'
command = [builder.config.imgmath_dvipng, '-o', filename, '-T', 'tight', '-z9']
command.extend(builder.config.imgmath_dvipng_args)
if builder.config.imgmath_use_preview:
command.append('--depth')
command.append(dvipath)
stdout, stderr = convert_dvi_to_image(command, name)
depth = None
if builder.config.imgmath_use_preview:
for line in stdout.splitlines():
matched = depth_re.match(line) # type: ignore
if matched:
depth = int(matched.group(1))
write_png_depth(filename, depth)
break
return filename, depth
def render_math(self, math):
# type: (nodes.NodeVisitor, unicode) -> Tuple[unicode, int]
"""Render the LaTeX math expression *math* using latex and dvipng.
Return the filename relative to the built document and the "depth",
that is, the distance of image bottom and baseline in pixels, if the
option to use preview_latex is switched on.
Error handling may seem strange, but follows a pattern: if LaTeX or
dvipng aren't available, only a warning is generated (since that enables
people on machines without these programs to at least build the rest
of the docs successfully). If the programs are there, however, they
may not fail since that indicates a problem in the math source.
"""
use_preview = self.builder.config.pngmath_use_preview
latex = DOC_HEAD + self.builder.config.pngmath_latex_preamble
latex += (use_preview and DOC_BODY_PREVIEW or DOC_BODY) % math
shasum = "%s.png" % sha1(latex.encode('utf-8')).hexdigest()
relfn = posixpath.join(self.builder.imgpath, 'math', shasum)
outfn = path.join(self.builder.outdir, self.builder.imagedir, 'math',
shasum)
if path.isfile(outfn):
depth = read_png_depth(outfn)
return relfn, depth
# if latex or dvipng has failed once, don't bother to try again
if hasattr(self.builder, '_mathpng_warned_latex') or \
hasattr(self.builder, '_mathpng_warned_dvipng'):
return None, None
# use only one tempdir per build -- the use of a directory is cleaner
# than using temporary files, since we can clean up everything at once
# just removing the whole directory (see cleanup_tempdir)
if not hasattr(self.builder, '_mathpng_tempdir'):
tempdir = self.builder._mathpng_tempdir = tempfile.mkdtemp()
else:
tempdir = self.builder._mathpng_tempdir
with codecs.open(path.join(tempdir, 'math.tex'), 'w',
'utf-8') as tf: # type: ignore
tf.write(latex)
# build latex command; old versions of latex don't have the
# --output-directory option, so we have to manually chdir to the
# temp dir to run it.
ltx_args = [self.builder.config.pngmath_latex, '--interaction=nonstopmode']
# add custom args from the config file
ltx_args.extend(self.builder.config.pngmath_latex_args)
ltx_args.append('math.tex')
with cd(tempdir):
try:
p = Popen(ltx_args, stdout=PIPE, stderr=PIPE)
except OSError as err:
if err.errno != ENOENT: # No such file or directory
raise
logger.warning(
'LaTeX command %r cannot be run (needed for math '
'display), check the pngmath_latex setting',
self.builder.config.pngmath_latex)
self.builder._mathpng_warned_latex = True
return None, None
stdout, stderr = p.communicate()
if p.returncode != 0:
raise MathExtError('latex exited with error', stderr, stdout)
ensuredir(path.dirname(outfn))
# use some standard dvipng arguments
dvipng_args = [self.builder.config.pngmath_dvipng]
dvipng_args += ['-o', outfn, '-T', 'tight', '-z9']
# add custom ones from config value
dvipng_args.extend(self.builder.config.pngmath_dvipng_args)
if use_preview:
dvipng_args.append('--depth')
# last, the input file name
dvipng_args.append(path.join(tempdir, 'math.dvi'))
try:
p = Popen(dvipng_args, stdout=PIPE, stderr=PIPE)
except OSError as err:
if err.errno != ENOENT: # No such file or directory
raise
logger.warning(
'dvipng command %r cannot be run (needed for math '
'display), check the pngmath_dvipng setting',
self.builder.config.pngmath_dvipng)
self.builder._mathpng_warned_dvipng = True
return None, None
stdout, stderr = p.communicate()
if p.returncode != 0:
raise MathExtError('dvipng exited with error', stderr, stdout)
depth = None
if use_preview:
for line in stdout.splitlines():
m = depth_re.match(line)
if m:
depth = int(m.group(1))
write_png_depth(outfn, depth)
break
return relfn, depth
self.builder.warn('dvipng command %r cannot be run (needed for math '
'display), check the pngmath_dvipng setting' %
self.builder.config.pngmath_dvipng)
self.builder._mathpng_warned_dvipng = True
return None, None
stdout, stderr = p.communicate()
if p.returncode != 0:
raise MathExtError('dvipng exited with error:\n[stderr]\n%s\n'
'[stdout]\n%s' % (stderr, stdout))
depth = None
if use_preview:
for line in stdout.splitlines():
m = depth_re.match(line)
if m:
depth = int(m.group(1))
write_png_depth(outfn, depth)
break
return relfn, depth
def cleanup_tempdir(app, exc):
if exc:
return
if not hasattr(app.builder, '_mathpng_tempdir'):
return
try:
shutil.rmtree(app.builder._mathpng_tempdir)
except Exception:
pass
self.builder.warn('dvipng command %r cannot be run (needed for math '
'display), check the pngmath_dvipng setting' %
self.builder.config.pngmath_dvipng)
self.builder._mathpng_warned_dvipng = True
return None, None
stdout, stderr = p.communicate()
if p.returncode != 0:
raise MathExtError('dvipng exited with error:\n[stderr]\n%s\n'
'[stdout]\n%s' % (stderr, stdout))
depth = None
if use_preview:
for line in stdout.splitlines():
m = depth_re.match(line)
if m:
depth = int(m.group(1))
write_png_depth(outfn, depth)
break
return relfn, depth
def cleanup_tempdir(app, exc):
if exc:
return
if not hasattr(app.builder, '_mathpng_tempdir'):
return
try:
shutil.rmtree(app.builder._mathpng_tempdir)
except Exception:
pass
def get_tooltip(self, node):
def render_math(self, math):
"""Render the LaTeX math expression *math* using latex and dvipng or
dvisvgm.
Return the filename relative to the built document and the "depth",
that is, the distance of image bottom and baseline in pixels, if the
option to use preview_latex is switched on.
Error handling may seem strange, but follows a pattern: if LaTeX or dvipng
(dvisvgm) aren't available, only a warning is generated (since that enables
people on machines without these programs to at least build the rest of the
docs successfully). If the programs are there, however, they may not fail
since that indicates a problem in the math source.
"""
image_format = self.builder.config.imgmath_image_format
if image_format not in ('png', 'svg'):
raise MathExtError(
'imgmath_image_format must be either "png" or "svg"')
font_size = self.builder.config.imgmath_font_size
use_preview = self.builder.config.imgmath_use_preview
latex = DOC_HEAD + self.builder.config.imgmath_latex_preamble
latex += (use_preview and DOC_BODY_PREVIEW
or DOC_BODY) % (font_size, int(round(font_size * 1.2)), math)
shasum = "%s.%s" % (sha1(latex.encode('utf-8')).hexdigest(), image_format)
relfn = posixpath.join(self.builder.imgpath, 'math', shasum)
outfn = path.join(self.builder.outdir, self.builder.imagedir, 'math',
shasum)
if path.isfile(outfn):
depth = read_png_depth(outfn)
return relfn, depth
# if latex or dvipng (dvisvgm) has failed once, don't bother to try again
if hasattr(self.builder, '_imgmath_warned_latex') or \
hasattr(self.builder, '_imgmath_warned_image_translator'):
return None, None
# use only one tempdir per build -- the use of a directory is cleaner
# than using temporary files, since we can clean up everything at once
# just removing the whole directory (see cleanup_tempdir)
if not hasattr(self.builder, '_imgmath_tempdir'):
tempdir = self.builder._imgmath_tempdir = tempfile.mkdtemp()
else:
tempdir = self.builder._imgmath_tempdir
tf = codecs.open(path.join(tempdir, 'math.tex'), 'w', 'utf-8')
tf.write(latex)
tf.close()
# build latex command; old versions of latex don't have the
# --output-directory option, so we have to manually chdir to the
# temp dir to run it.
ltx_args = [self.builder.config.imgmath_latex, '--interaction=nonstopmode']
# add custom args from the config file
ltx_args.extend(self.builder.config.imgmath_latex_args)
ltx_args.append('math.tex')
with cd(tempdir):
try:
p = Popen(ltx_args, stdout=PIPE, stderr=PIPE)
except OSError as err:
if err.errno != ENOENT: # No such file or directory
raise
self.builder.warn(
'LaTeX command %r cannot be run (needed for math '
'display), check the imgmath_latex setting' %
self.builder.config.imgmath_latex)
self.builder._imgmath_warned_latex = True
return None, None
stdout, stderr = p.communicate()
if p.returncode != 0:
raise MathExtError('latex exited with error', stderr, stdout)
ensuredir(path.dirname(outfn))
if image_format == 'png':
image_translator = 'dvipng'
image_translator_executable = self.builder.config.imgmath_dvipng
# use some standard dvipng arguments
image_translator_args = [self.builder.config.imgmath_dvipng]
image_translator_args += ['-o', outfn, '-T', 'tight', '-z9']
# add custom ones from config value
image_translator_args.extend(self.builder.config.imgmath_dvipng_args)
if use_preview:
image_translator_args.append('--depth')
elif image_format == 'svg':
image_translator = 'dvisvgm'
image_translator_executable = self.builder.config.imgmath_dvisvgm
# use some standard dvisvgm arguments
image_translator_args = [self.builder.config.imgmath_dvisvgm]
image_translator_args += ['-o', outfn]
# add custom ones from config value
image_translator_args.extend(self.builder.config.imgmath_dvisvgm_args)
else:
raise MathExtError(
'imgmath_image_format must be either "png" or "svg"')
# last, the input file name
image_translator_args.append(path.join(tempdir, 'math.dvi'))
try:
p = Popen(image_translator_args, stdout=PIPE, stderr=PIPE)
except OSError as err:
if err.errno != ENOENT: # No such file or directory
raise
self.builder.warn(
'%s command %r cannot be run (needed for math '
'display), check the imgmath_%s setting' %
(image_translator, image_translator_executable, image_translator))
self.builder._imgmath_warned_image_translator = True
return None, None
stdout, stderr = p.communicate()
if p.returncode != 0:
raise MathExtError('%s exited with error' % image_translator, stderr,
stdout)
depth = None
if use_preview and image_format == 'png': # depth is only useful for png
for line in stdout.splitlines():
m = depth_re.match(line)
if m:
depth = int(m.group(1))
write_png_depth(outfn, depth)
break
return relfn, depth
def render_math(self, math):
"""Render the LaTeX math expression *math* using latex and dvipng.
Return the filename relative to the built document and the "depth",
that is, the distance of image bottom and baseline in pixels, if the
option to use preview_latex is switched on.
Error handling may seem strange, but follows a pattern: if LaTeX or
dvipng aren't available, only a warning is generated (since that enables
people on machines without these programs to at least build the rest
of the docs successfully). If the programs are there, however, they
may not fail since that indicates a problem in the math source.
"""
use_preview = self.builder.config.pngmath_use_preview
latex = DOC_HEAD + self.builder.config.pngmath_latex_preamble
latex += (use_preview and DOC_BODY_PREVIEW or DOC_BODY) % math
shasum = "%s.png" % sha1(latex.encode('utf-8')).hexdigest()
relfn = posixpath.join(self.builder.imgpath, 'math', shasum)
outfn = path.join(self.builder.outdir, self.builder.imagedir, 'math', shasum)
if path.isfile(outfn):
depth = read_png_depth(outfn)
return relfn, depth
# if latex or dvipng has failed once, don't bother to try again
if hasattr(self.builder, '_mathpng_warned_latex') or \
hasattr(self.builder, '_mathpng_warned_dvipng'):
return None, None
# use only one tempdir per build -- the use of a directory is cleaner
# than using temporary files, since we can clean up everything at once
# just removing the whole directory (see cleanup_tempdir)
if not hasattr(self.builder, '_mathpng_tempdir'):
tempdir = self.builder._mathpng_tempdir = tempfile.mkdtemp()
else:
tempdir = self.builder._mathpng_tempdir
tf = codecs.open(path.join(tempdir, 'math.tex'), 'w', 'utf-8')
tf.write(latex)
tf.close()
# build latex command; old versions of latex don't have the
# --output-directory option, so we have to manually chdir to the
# temp dir to run it.
ltx_args = [self.builder.config.pngmath_latex, '--interaction=nonstopmode']
# add custom args from the config file
ltx_args.extend(self.builder.config.pngmath_latex_args)
ltx_args.append('math.tex')
with cd(tempdir):
try:
p = Popen(ltx_args, stdout=PIPE, stderr=PIPE)
except OSError as err:
if err.errno != ENOENT: # No such file or directory
raise
self.builder.warn('LaTeX command %r cannot be run (needed for math '
'display), check the pngmath_latex setting' %
self.builder.config.pngmath_latex)
self.builder._mathpng_warned_latex = True
return None, None
stdout, stderr = p.communicate()
if p.returncode != 0:
raise MathExtError('latex exited with error', stderr, stdout)
ensuredir(path.dirname(outfn))
# use some standard dvipng arguments
dvipng_args = [self.builder.config.pngmath_dvipng]
dvipng_args += ['-o', outfn, '-T', 'tight', '-z9']
# add custom ones from config value
dvipng_args.extend(self.builder.config.pngmath_dvipng_args)
if use_preview:
dvipng_args.append('--depth')
# last, the input file name
dvipng_args.append(path.join(tempdir, 'math.dvi'))
try:
p = Popen(dvipng_args, stdout=PIPE, stderr=PIPE)
except OSError as err:
if err.errno != ENOENT: # No such file or directory
raise
self.builder.warn('dvipng command %r cannot be run (needed for math '
'display), check the pngmath_dvipng setting' %
self.builder.config.pngmath_dvipng)
self.builder._mathpng_warned_dvipng = True
return None, None
stdout, stderr = p.communicate()
if p.returncode != 0:
raise MathExtError('dvipng exited with error', stderr, stdout)
depth = None
if use_preview:
for line in stdout.splitlines():
m = depth_re.match(line)
if m:
depth = int(m.group(1))
write_png_depth(outfn, depth)
break
return relfn, depth
def render_math(self, math):
"""Render the LaTeX math expression *math* using latex and dvipng or
dvisvgm.
Return the filename relative to the built document and the "depth",
that is, the distance of image bottom and baseline in pixels, if the
option to use preview_latex is switched on.
Error handling may seem strange, but follows a pattern: if LaTeX or dvipng
(dvisvgm) aren't available, only a warning is generated (since that enables
people on machines without these programs to at least build the rest of the
docs successfully). If the programs are there, however, they may not fail
since that indicates a problem in the math source.
"""
image_format = self.builder.config.imgmath_image_format
if image_format not in ("png", "svg"):
raise MathExtError('imgmath_image_format must be either "png" or "svg"')
font_size = self.builder.config.imgmath_font_size
use_preview = self.builder.config.imgmath_use_preview
latex = DOC_HEAD + self.builder.config.imgmath_latex_preamble
latex += (use_preview and DOC_BODY_PREVIEW or DOC_BODY) % (font_size, int(round(font_size * 1.2)), math)
shasum = "%s.%s" % (sha1(latex.encode("utf-8")).hexdigest(), image_format)
relfn = posixpath.join(self.builder.imgpath, "math", shasum)
outfn = path.join(self.builder.outdir, self.builder.imagedir, "math", shasum)
if path.isfile(outfn):
depth = read_png_depth(outfn)
return relfn, depth
# if latex or dvipng (dvisvgm) has failed once, don't bother to try again
if hasattr(self.builder, "_imgmath_warned_latex") or hasattr(self.builder, "_imgmath_warned_image_translator"):
return None, None
# use only one tempdir per build -- the use of a directory is cleaner
# than using temporary files, since we can clean up everything at once
# just removing the whole directory (see cleanup_tempdir)
if not hasattr(self.builder, "_imgmath_tempdir"):
tempdir = self.builder._imgmath_tempdir = tempfile.mkdtemp()
else:
tempdir = self.builder._imgmath_tempdir
tf = codecs.open(path.join(tempdir, "math.tex"), "w", "utf-8")
tf.write(latex)
tf.close()
# build latex command; old versions of latex don't have the
# --output-directory option, so we have to manually chdir to the
# temp dir to run it.
ltx_args = [self.builder.config.imgmath_latex, "--interaction=nonstopmode"]
# add custom args from the config file
ltx_args.extend(self.builder.config.imgmath_latex_args)
ltx_args.append("math.tex")
with cd(tempdir):
try:
p = Popen(ltx_args, stdout=PIPE, stderr=PIPE)
except OSError as err:
if err.errno != ENOENT: # No such file or directory
raise
self.builder.warn(
"LaTeX command %r cannot be run (needed for math "
"display), check the imgmath_latex setting" % self.builder.config.imgmath_latex
)
self.builder._imgmath_warned_latex = True
return None, None
stdout, stderr = p.communicate()
if p.returncode != 0:
raise MathExtError("latex exited with error", stderr, stdout)
ensuredir(path.dirname(outfn))
if image_format == "png":
image_translator = "dvipng"
image_translator_executable = self.builder.config.imgmath_dvipng
# use some standard dvipng arguments
image_translator_args = [self.builder.config.imgmath_dvipng]
image_translator_args += ["-o", outfn, "-T", "tight", "-z9"]
# add custom ones from config value
image_translator_args.extend(self.builder.config.imgmath_dvipng_args)
if use_preview:
image_translator_args.append("--depth")
elif image_format == "svg":
image_translator = "dvisvgm"
image_translator_executable = self.builder.config.imgmath_dvisvgm
# use some standard dvisvgm arguments
image_translator_args = [self.builder.config.imgmath_dvisvgm]
image_translator_args += ["-o", outfn]
# add custom ones from config value
image_translator_args.extend(self.builder.config.imgmath_dvisvgm_args)
# last, the input file name
image_translator_args.append(path.join(tempdir, "math.dvi"))
else:
raise MathExtError('imgmath_image_format must be either "png" or "svg"')
# last, the input file name
image_translator_args.append(path.join(tempdir, "math.dvi"))
try:
p = Popen(image_translator_args, stdout=PIPE, stderr=PIPE)
except OSError as err:
if err.errno != ENOENT: # No such file or directory
raise
self.builder.warn(
"%s command %r cannot be run (needed for math " "display), check the imgmath_%s setting" % image_translator,
image_translator_executable,
image_translator,
)
self.builder._imgmath_warned_image_translator = True
return None, None
stdout, stderr = p.communicate()
if p.returncode != 0:
raise MathExtError("%s exited with error", image_translator, stderr, stdout)
depth = None
if use_preview and image_format == "png": # depth is only useful for png
for line in stdout.splitlines():
m = depth_re.match(line)
if m:
depth = int(m.group(1))
write_png_depth(outfn, depth)
break
return relfn, depth