def run_latex(pictype, codehash, codetext, cachepath, dpi=300, pdflatexpath=None):
"""Run the image generation for pstricks and tikz images."""
# try and find pdflatex
if pdflatexpath is None:
path = os.environ.get('LATEX_PATH', os.environ.get('PATH'))
texpath = [p for p in path.split(':') if 'tex' in p]
if texpath:
pdflatexpath = texpath[0] + '/pdflatex'
else:
# no custom latex installed. Try /usr/local/bin and /usr/local
for path in ['/usr/local/bin/', '/usr/bin/']:
texpath = os.path.join(path, 'pdflatex')
if os.path.exists(texpath):
pdflatexpath = texpath
break
# copy to local image cache in .bookbuilder/images
image_cache_path = os.path.join(cachepath, pictype, codehash + '.png')
rendered = False
# skip image generation if it exists
if os.path.exists(image_cache_path):
rendered = True
sys.stdout.write('s')
if not rendered:
sys.stdout.write('.')
if pictype == 'pspicture':
latex_code = pspicture2png(codetext)
preamble = PsPicture_preamble()
elif pictype == 'tikzpicture':
latex_code = tikzpicture2png(codetext)
preamble = tikz_preamble()
elif pictype == 'equation':
latex_code = equation2png(codetext)
preamble = equation_preamble()
try:
figpath = latex2png(latex_code, preamble, dpi=dpi, pdflatexpath=pdflatexpath)
except LatexPictureError as lpe:
print(colored("\nLaTeX failure", "red"))
print(unicode(lpe))
return None
if figpath:
# done. copy to image cache
copy_if_newer(figpath, image_cache_path)
# copy the pdf also but run pdfcrop first
copy_if_newer(figpath.replace('.png', '.pdf'),
image_cache_path.replace('.png', '.pdf'))
cleanup_after_latex(figpath)
else:
figpath = image_cache_path
sys.stdout.flush()
return image_cache_path
def __copy_html_images(self, build_folder, output_path):
''' Find all images referenced in the converted html document and copy
them to their correct relative places in the build/tex folder.
'''
success = True
# copy images directly included in cnxmlplus to the output folder
with open(output_path, 'r') as f_in:
html = etree.HTML(f_in.read())
for img in html.findall('.//img'):
src = img.attrib['src']
dest = os.path.join(os.path.dirname(output_path), src)
if not os.path.exists(src) and (not os.path.exists(dest)):
print_debug_msg(src + " doesn't exist")
success = copy_if_newer(src, dest)
return success
def __copy_tex_images(self, build_folder, output_path):
"""
Copy tex images.
Find all images referenced in the cnxmlplus document and copy them
to their correct relative places in the build/tex folder.
"""
success = True
with open(self.file) as f_in:
xml = etree.XML(f_in.read())
# if it is tex, we can copy the images referenced in the cnxmlplus
# directly to the build/tex folder
for image in xml.findall('.//image'):
# find the src, it may be an attribute or a child element
if 'src' in image.attrib:
src = image.attrib['src'].strip()
else:
src = image.find('.//src').text.strip()
# check for paths starting with /
if src.startswith('/'):
print(colored("ERROR! image paths may not start with /: ",
"red") + src)
success = False
continue
dest = os.path.join(build_folder, 'tex', src)
if not os.path.exists(dest):
try:
mkdir_p(os.path.dirname(dest))
except OSError:
msg = colored("WARNING! {dest} is not allowed!"
.format(dest=dest),
"magenta")
success = False
print(msg)
success = copy_if_newer(src, dest)
return success
