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Fix #816616 (Too many open files)

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This commit is contained in:
Kovid Goyal 2011-09-05 10:06:30 -06:00
commit a7254ffc1d
2 changed files with 76 additions and 22 deletions
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3
src/calibre/ebooks/pdf/writer.py
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@ -198,7 +198,8 @@ class PDFWriter(QObject): # {{{
try:
outPDF = PdfFileWriter(title=self.metadata.title, author=self.metadata.author)
for item in self.combine_queue:
inputPDF = PdfFileReader(open(item, 'rb'))
with open(item, 'rb') as item_stream:
inputPDF = PdfFileReader(item_stream)
for page in inputPDF.pages:
outPDF.addPage(page)
outPDF.write(self.out_stream)

87
src/calibre/ebooks/txt/markdownml.py
View File

@ -22,6 +22,7 @@ class MarkdownMLizer(OEB2HTML):
def extract_content(self, oeb_book, opts):
self.log.info('Converting XHTML to Markdown formatted TXT...')
self.opts = opts
self.in_code = False
self.in_pre = False
self.list = []
self.blockquotes = 0
@ -55,10 +56,27 @@ class MarkdownMLizer(OEB2HTML):
def tidy_up(self, text):
# Remove blank space form beginning of paragraph.
text = re.sub('(?msu)^[ ]{1,3}', '', text)
# pre has 4 spaces. We trimmed 3 so anything with a space left is a pre.
text = re.sub('(?msu)^[ ]', ' ', text)
# Remove tabs that aren't at the beinning of a line
new_text = []
for l in text.splitlines():
start = re.match('\t+', l)
if start:
start = start.group()
else:
start = ''
l = re.sub('\t', '', l)
new_text.append(start + l)
text = '\n'.join(new_text)
# Remove spaces from blank lines.
text = re.sub('(?msu)^[ ]+$', '', text)
# Reduce blank lines
text = re.sub('(?msu)\n{7,}', '\n' * 6, text)
# Remove blank lines at beginning and end of document.
text = re.sub('^\s*', '', text)
text = re.sub('\s*$', '\n\n', text)
@ -81,6 +99,12 @@ class MarkdownMLizer(OEB2HTML):
txt = re.sub(r'([\\`*_{}\[\]()#+!])', r'\\\1', txt)
return txt
def prepare_string_for_pre(self, txt):
new_text = []
for l in txt.splitlines():
new_text.append(' ' + l)
return '\n'.join(new_text)
def dump_text(self, elem, stylizer):
'''
@elem: The element in the etree that we are working on.
@ -97,7 +121,7 @@ class MarkdownMLizer(OEB2HTML):
return ['']
# Setup our variables.
text = ['']
text = []
style = stylizer.style(elem)
tags = []
tag = barename(elem.tag)
@ -143,46 +167,74 @@ class MarkdownMLizer(OEB2HTML):
self.blockquotes += 1
tags.append('>')
text.append('> ' * self.blockquotes)
elif tag in ('code', 'pre'):
elif tag == 'code':
if not self.in_pre and not self.in_code:
text.append('`')
tags.append('`')
self.in_code = True
elif tag == 'pre':
if not self.in_pre:
text.append('\n')
tags.append('pre')
self.in_pre = True
text.append(' ')
elif tag == 'hr':
text.append('\n* * *')
tags.append('\n')
elif tag == 'a':
# Only write links with absolute (external) urls.
if attribs.has_key('href') and '://' in attribs['href']:
if self.opts.keep_links and attribs.has_key('href') and '://' in attribs['href']:
title = ''
if attribs.has_key('title'):
title = ' "' + attribs['title'] + '" '
title = ' "' + attribs['title'] + '"'
remove_space = self.remove_space_after_newline
title = self.remove_newlines(title)
self.remove_space_after_newline = remove_space
text.append('[')
tags.append('](' + attribs['href'] + title + ')')
elif tag == 'img':
if self.opts.keep_image_references:
txt = '!'
if attribs.has_key('alt'):
txt += '[' + attribs['alt'] + ']'
remove_space = self.remove_space_after_newline
txt += '[' + self.remove_newlines(attribs['alt']) + ']'
self.remove_space_after_newline = remove_space
txt += '(' + attribs['src'] + ')'
text.append(txt)
elif tag in ('ol', 'ul'):
tags.append(tag)
# Add the list to our lists of lists so we can track
# nested lists.
self.list.append({'name': tag, 'num': 0})
elif tag == 'li':
# Get the last list from our list of lists
if self.list:
li = self.list[-1]
else:
li = {'name': 'ul', 'num': 0}
# Add a new line to start the item
text.append('\n')
# Add indent if we have nested lists.
list_count = len(self.list)
# We only care about indenting nested lists.
if (list_count - 1) > 0:
text.append('\t' * (list_count - 1))
# Add blockquote if we have a blockquote in a list item.
text.append(bq)
# Write the proper sign for ordered and unorded lists.
if li['name'] == 'ul':
text.append('+ ')
elif li['name'] == 'ol':
text.append(unicode(len(self.list)) + '. ')
tags.append('')
li['num'] += 1
text.append(unicode(li['num']) + '. ')
# Process tags that contain text.
if hasattr(elem, 'text') and elem.text:
txt = elem.text
if not self.in_pre:
if self.in_pre:
txt = self.prepare_string_for_pre(txt)
elif self.in_code:
txt = self.remove_newlines(txt)
else:
txt = self.prepare_string_for_markdown(self.remove_newlines(txt))
text.append(txt)
@ -193,26 +245,23 @@ class MarkdownMLizer(OEB2HTML):
# Close all open tags.
tags.reverse()
for t in tags:
if t in ('pre', 'ul', 'ol', 'li', '>', 'block'):
if t in ('pre', 'ul', 'ol', '>'):
if t == 'pre':
self.in_pre = False
text.append('\n')
elif t == '>':
self.blockquotes -= 1
elif t == 'block':
if self.style_bold:
text.append('**')
if self.style_italic:
text.append('*')
elif t in ('ul', 'ol'):
if self.list:
self.list.pop()
if not self.list:
text.append('\n')
else:
if t == '**':
self.style_bold = False
elif t == '*':
self.style_italic = False
elif t == '`':
self.in_code = False
text.append('%s' % t)
# Soft scene breaks.
@ -224,7 +273,11 @@ class MarkdownMLizer(OEB2HTML):
# Add the text that is outside of the tag.
if hasattr(elem, 'tail') and elem.tail:
tail = elem.tail
if not self.in_pre:
if self.in_pre:
tail = self.prepare_string_for_pre(tail)
elif self.in_code:
tail = self.remove_newlines(tail)
else:
tail = self.prepare_string_for_markdown(self.remove_newlines(tail))
text.append(tail)