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Closes #923: Take the entire LaTeX document into account when caching

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pngmath-generated images.  This rebuilds them correctly when
``pngmath_latex_preamble`` changes.
This commit is contained in:
Georg Brandl
2014-01-11 09:17:27 +01:00
parent cfecf17aed
commit fe0532a6e3
2 changed files with 7 additions and 4 deletions
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4
CHANGES
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@@ -39,6 +39,10 @@ Bugs fixed
* #943: In autosummary, recognize "first sentences" to pull from the docstring
if they contain uppercase letters.
* #923: Take the entire LaTeX document into account when caching
pngmath-generated images. This rebuilds them correctly when
``pngmath_latex_preamble`` changes.
Documentation
-------------

7
sphinx/ext/pngmath.py
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@@ -82,8 +82,10 @@ def render_math(self, math):
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" % sha(math.encode('utf-8')).hexdigest()
shasum = "%s.png" % sha(latex.encode('utf-8')).hexdigest()
relfn = posixpath.join(self.builder.imgpath, 'math', shasum)
outfn = path.join(self.builder.outdir, '_images', 'math', shasum)
if path.isfile(outfn):
@@ -95,9 +97,6 @@ def render_math(self, math):
hasattr(self.builder, '_mathpng_warned_dvipng'):
return None, None
latex = DOC_HEAD + self.builder.config.pngmath_latex_preamble
latex += (use_preview and DOC_BODY_PREVIEW or DOC_BODY) % math
# 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)