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https://github.com/kovidgoyal/calibre.git
synced 2025-07-09 03:04:10 -04:00
Ignore non internal links. Support composite images.
This commit is contained in:
John Schember
parent
8557981a51
commit
644335d97b
@ -13,10 +13,9 @@ import zlib
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from collections import OrderedDict
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from calibre import CurrentDir
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from calibre.ebooks.metadata.opf2 import OPFCreator
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from calibre.ebooks.pdb.formatreader import FormatReader
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from calibre.ptempfile import TemporaryFile
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from calibre.utils.magick import Image
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from calibre.utils.magick import Image, create_canvas
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DATATYPE_PHTML = 0
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DATATYPE_PHTML_COMPRESSED = 1
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@ -178,6 +177,7 @@ class SectionHeaderText(object):
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self.sizes.append(struct.unpack('>H', raw[adv:2+adv])[0])
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self.attributes.append(struct.unpack('>H', raw[2+adv:4+adv])[0])
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class SectionMetadata(object):
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def __init__(self, raw):
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@ -220,6 +220,7 @@ class SectionMetadata(object):
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adv += 2*length
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class SectionText(object):
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def __init__(self, section_header, raw):
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@ -227,6 +228,34 @@ class SectionText(object):
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self.data = raw[section_header.paragraphs * 4:]
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class SectionCompositeImage(object):
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def __init__(self, raw):
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self.columns, = struct.unpack('>H', raw[0:2])
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self.rows, = struct.unpack('>H', raw[2:4])
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# [
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# row [col, col, col...],
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# row [col, col, col...],
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# ...
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# ]
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#
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# Each item in the layout is in it's
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# correct position in the final
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# composite.
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#
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# Each item in the layout is a uid
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# to an image record.
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self.layout = []
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offset = 4
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for i in xrange(self.rows):
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col = []
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for j in xrange(self.columns):
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col.append(struct.unpack('>H', raw[offset:offset+2])[0])
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offset += 2
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self.layout.append(col)
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class Reader(FormatReader):
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def __init__(self, header, stream, log, options):
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@ -240,6 +269,7 @@ class Reader(FormatReader):
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self.uid_text_secion_number = OrderedDict()
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self.uid_text_secion_encoding = {}
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self.uid_image_section_number = {}
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self.uid_composite_image_section_number = {}
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self.metadata_section_number = None
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self.default_encoding = 'utf-8'
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self.owner_id = None
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@ -266,8 +296,9 @@ class Reader(FormatReader):
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elif section_header.type == DATATYPE_METADATA:
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self.metadata_section_number = section_number
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section = SectionMetadata(raw_data[start:])
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#elif section_header.type == DATATYPE_COMPOSITE_IMAGE:
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elif section_header.type == DATATYPE_COMPOSITE_IMAGE:
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self.uid_composite_image_section_number[section_header.uid] = section_number
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section = SectionCompositeImage(raw_data[start:])
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self.sections.append((section_header, section))
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@ -282,6 +313,9 @@ class Reader(FormatReader):
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self.mi = get_metadata(stream, False)
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def extract_content(self, output_dir):
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# Each text record is independent (unless the continuation
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# value is set in the previous record). Put each converted
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# text recored into a separate file.
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with CurrentDir(output_dir):
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for uid, num in self.uid_text_secion_number.items():
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self.log.debug(_('Writing record with uid: %s as %s.html' % (uid, uid)))
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@ -297,9 +331,11 @@ class Reader(FormatReader):
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htmlf.write(html.encode('utf-8'))
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images = []
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image_sizes = {}
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if not os.path.exists(os.path.join(output_dir, 'images/')):
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os.makedirs(os.path.join(output_dir, 'images/'))
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with CurrentDir(os.path.join(output_dir, 'images/')):
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# Single images.
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for uid, num in self.uid_image_section_number.items():
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section_header, section_data = self.sections[num]
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if section_data:
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@ -317,6 +353,7 @@ class Reader(FormatReader):
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itf.write(idata)
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im = Image()
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im.read(itn)
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image_sizes[uid] = im.size
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im.set_compression_quality(70)
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im.save('%s.jpg' % uid)
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self.log.debug('Wrote image with uid %s to images/%s.jpg' % (uid, uid))
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@ -325,6 +362,49 @@ class Reader(FormatReader):
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images.append('%s.jpg' % uid)
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else:
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self.log.error('Failed to write image with uid %s: No data.' % uid)
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# Composite images.
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for uid, num in self.uid_composite_image_section_number.items():
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try:
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section_header, section_data = self.sections[num]
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# Get the final width and height.
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width = 0
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height = 0
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for row in section_data.layout:
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row_width = 0
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col_height = 0
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for col in row:
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if col not in image_sizes:
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raise Exception('Image with uid: %s missing.' % col)
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im = Image()
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im.read('%s.jpg' % col)
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w, h = im.size
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row_width += w
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if col_height < h:
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col_height = h
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if width < row_width:
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width = row_width
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height += col_height
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# Create a new image the total size of all image
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# parts. Put the parts into the new image.
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canvas = create_canvas(width, height)
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y_off = 0
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for row in section_data.layout:
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x_off = 0
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largest_height = 0
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for col in row:
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im = Image()
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im.read('%s.jpg' % col)
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canvas.compose(im, x_off, y_off)
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w, h = im.size
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x_off += w
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if largest_height < h:
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largest_height = h
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y_off += largest_height
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canvas.set_compression_quality(70)
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canvas.save('%s.jpg' % uid)
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self.log.debug('Wrote composite image with uid %s to images/%s.jpg' % (uid, uid))
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except Exception as e:
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self.log.error('Failed to write composite image with uid %s: %s' % (uid, e))
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# Run the HTML through the html processing plugin.
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from calibre.customize.ui import plugin_for_input_format
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@ -334,13 +414,17 @@ class Reader(FormatReader):
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self.options.input_encoding = 'utf-8'
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odi = self.options.debug_pipeline
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self.options.debug_pipeline = None
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# Generate oeb from html conversion.
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# Determine the home.html record uid. This should be set in the
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# reserved values in the metadata recored. home.html is the first
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# text record (should have hyper link references to other records)
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# in the document.
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try:
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home_html = self.header_record.home_html
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if not home_html:
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home_html = self.uid_text_secion_number.items()[0][0]
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except:
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raise Exception(_('Could not determine home.html'))
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# Generate oeb from html conversion.
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oeb = html_input.convert(open('%s.html' % home_html, 'rb'), self.options, 'html', self.log, {})
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self.options.debug_pipeline = odi
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@ -359,6 +443,7 @@ class Reader(FormatReader):
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html = u'<p id="p0">'
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offset = 0
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paragraph_open = True
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link_open = False
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need_set_p_id = False
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p_num = 1
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paragraph_offsets = []
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@ -387,14 +472,15 @@ class Reader(FormatReader):
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if c == 0x0a:
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offset += 1
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id = struct.unpack('>H', d[offset:offset+2])[0]
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html += '<a href="%s.html">' % id
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if id in self.uid_text_secion_number:
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html += '<a href="%s.html">' % id
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link_open = True
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offset += 1
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# Targeted page link begins
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# 3 Bytes
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# record ID, target
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elif c == 0x0b:
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offset += 3
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html += '<a>'
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# Paragraph link begins
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# 4 Bytes
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# record ID, paragraph number
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@ -403,18 +489,21 @@ class Reader(FormatReader):
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id = struct.unpack('>H', d[offset:offset+2])[0]
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offset += 2
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pid = struct.unpack('>H', d[offset:offset+2])[0]
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html += '<a href="%s.html#p%s">' % (id, pid)
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if id in self.uid_text_secion_number:
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html += '<a href="%s.html#p%s">' % (id, pid)
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link_open = True
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offset += 1
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# Targeted paragraph link begins
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# 5 Bytes
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# record ID, paragraph number, target
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elif c == 0x0d:
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offset += 5
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html += '<a>'
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# Link ends
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# 0 Bytes
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elif c == 0x08:
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html += '</a>'
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if link_open:
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html += '</a>'
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link_open = False
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# Set font
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# 1 Bytes
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# font specifier
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