326 lines
12 KiB
Python
326 lines
12 KiB
Python
#!/usr/bin/env python
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import sys
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from pdfdevice import PDFDevice, PDFTextDevice
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from pdffont import PDFUnicodeNotDefined
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from layout import LayoutContainer
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from layout import LTPage, LTText, LTLine, LTRect, LTPolygon
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from layout import LTFigure, LTTextItem, LTTextBox, LTTextLine
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from utils import enc
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from utils import apply_matrix_pt, mult_matrix
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## TagExtractor
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##
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class TagExtractor(PDFDevice):
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def __init__(self, rsrc, outfp, codec='utf-8'):
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PDFDevice.__init__(self, rsrc)
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self.outfp = outfp
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self.codec = codec
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self.pageno = 0
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self.tag = None
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return
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def render_string(self, textstate, seq):
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font = textstate.font
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text = ''
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for obj in seq:
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if not isinstance(obj, str): continue
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chars = font.decode(obj)
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for cid in chars:
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try:
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char = font.to_unichr(cid)
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text += char
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except PDFUnicodeNotDefined:
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pass
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self.outfp.write(enc(text, self.codec))
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return
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def begin_page(self, page, ctm):
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(x0, y0, x1, y1) = page.mediabox
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bbox = '%.3f,%.3f,%.3f,%.3f' % (x0, y0, x1, y1)
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self.outfp.write('<page id="%s" bbox="%s" rotate="%d">' %
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(self.pageno, bbox, page.rotate))
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return
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def end_page(self, page):
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self.outfp.write('</page>\n')
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self.pageno += 1
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return
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def begin_tag(self, tag, props=None):
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s = ''
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if props:
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s = ''.join( ' %s="%s"' % (enc(k), enc(str(v))) for (k,v)
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in sorted(props.iteritems()) )
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self.outfp.write('<%s%s>' % (enc(tag.name), s))
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self.tag = tag
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return
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def end_tag(self):
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assert self.tag
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self.outfp.write('</%s>' % enc(self.tag.name))
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self.tag = None
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return
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def do_tag(self, tag, props=None):
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self.begin_tag(tag, props)
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self.tag = None
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return
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## PDFPageAggregator
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##
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class PDFPageAggregator(PDFTextDevice):
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def __init__(self, rsrc, pageno=1, laparams=None):
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PDFTextDevice.__init__(self, rsrc)
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self.laparams = laparams
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self.pageno = pageno
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self.stack = []
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return
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def begin_page(self, page, ctm):
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(x0,y0,x1,y1) = page.mediabox
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(x0,y0) = apply_matrix_pt(ctm, (x0,y0))
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(x1,y1) = apply_matrix_pt(ctm, (x1,y1))
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mediabox = (0, 0, abs(x0-x1), abs(y0-y1))
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self.cur_item = LTPage(self.pageno, mediabox)
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return
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def end_page(self, _):
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assert not self.stack
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assert isinstance(self.cur_item, LTPage)
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self.cur_item.fixate()
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if self.laparams:
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self.cur_item.analyze_layout(self.laparams)
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self.pageno += 1
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return self.cur_item
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def begin_figure(self, name, bbox, matrix):
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self.stack.append(self.cur_item)
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self.cur_item = LTFigure(name, bbox, mult_matrix(matrix, self.ctm))
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return
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def end_figure(self, _):
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fig = self.cur_item
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self.cur_item.fixate()
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self.cur_item = self.stack.pop()
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self.cur_item.add(fig)
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return
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def paint_path(self, gstate, stroke, fill, evenodd, path):
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shape = ''.join(x[0] for x in path)
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if shape == 'ml':
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# horizontal/vertical line
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(_,x0,y0) = path[0]
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(_,x1,y1) = path[1]
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(x0,y0) = apply_matrix_pt(self.ctm, (x0,y0))
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(x1,y1) = apply_matrix_pt(self.ctm, (x1,y1))
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self.cur_item.add(LTLine(gstate.linewidth, (x0,y0), (x1,y1)))
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elif shape == 'mlllh':
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# rectangle
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(_,x0,y0) = path[0]
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(_,x1,y1) = path[1]
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(_,x2,y2) = path[2]
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(_,x3,y3) = path[3]
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(x0,y0) = apply_matrix_pt(self.ctm, (x0,y0))
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(x1,y1) = apply_matrix_pt(self.ctm, (x1,y1))
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(x2,y2) = apply_matrix_pt(self.ctm, (x2,y2))
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(x3,y3) = apply_matrix_pt(self.ctm, (x3,y3))
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if ((x0 == x1 and y1 == y2 and x2 == x3 and y3 == y0) or
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(y0 == y1 and x1 == x2 and y2 == y3 and x3 == x0)):
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self.cur_item.add(LTRect(gstate.linewidth, (x0,y0,x2,y2)))
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else:
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# other polygon
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pts = []
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for p in path:
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for i in xrange(1, len(p), 2):
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pts.append(apply_matrix_pt(self.ctm, (p[i], p[i+1])))
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self.cur_item.add(LTPolygon(gstate.linewidth, pts))
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return
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def render_chars(self, matrix, font, fontsize, charspace, scaling, chars):
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if not chars: return (0, 0)
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item = LTTextItem(matrix, font, fontsize, charspace, scaling, chars)
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self.cur_item.add(item)
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return item.adv
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## PDFConverter
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##
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class PDFConverter(PDFPageAggregator):
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def __init__(self, rsrc, outfp, codec='utf-8', pageno=1, laparams=None):
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PDFPageAggregator.__init__(self, rsrc, pageno=pageno, laparams=laparams)
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self.outfp = outfp
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self.codec = codec
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return
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def write(self, text):
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self.outfp.write(enc(text, self.codec))
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return
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## XMLConverter
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##
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class XMLConverter(PDFConverter):
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def __init__(self, rsrc, outfp, codec='utf-8', pageno=1, laparams=None):
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PDFConverter.__init__(self, rsrc, outfp, codec=codec, pageno=pageno, laparams=laparams)
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self.outfp.write('<?xml version="1.0" encoding="%s" ?>\n' % codec)
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self.outfp.write('<pages>\n')
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return
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def end_page(self, page):
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def render(item):
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if isinstance(item, LTPage):
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self.outfp.write('<page id="%s" bbox="%s" rotate="%d">\n' %
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(item.id, item.get_bbox(), item.rotate))
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for child in item:
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render(child)
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self.outfp.write('</page>\n')
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elif isinstance(item, LTLine) and item.direction:
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self.outfp.write('<line linewidth="%d" direction="%s" bbox="%s" />' % (item.linewidth, item.direction, item.get_bbox()))
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elif isinstance(item, LTRect):
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self.outfp.write('<rect linewidth="%d" bbox="%s" />' % (item.linewidth, item.get_bbox()))
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elif isinstance(item, LTPolygon):
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self.outfp.write('<polygon linewidth="%d" bbox="%s" pts="%s"/>' % (item.linewidth, item.get_bbox(), item.get_pts()))
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elif isinstance(item, LTFigure):
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self.outfp.write('<figure id="%s" bbox="%s">\n' % (item.id, item.get_bbox()))
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for child in item:
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render(child)
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self.outfp.write('</figure>\n')
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elif isinstance(item, LTTextLine):
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self.outfp.write('<textline bbox="%s">\n' % (item.get_bbox()))
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for child in item:
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render(child)
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self.outfp.write('</textline>\n')
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elif isinstance(item, LTTextBox):
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self.outfp.write('<textbox id="%s" bbox="%s">\n' % (item.id, item.get_bbox()))
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for child in item:
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render(child)
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self.outfp.write('</textbox>\n')
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elif isinstance(item, LTTextItem):
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self.outfp.write('<text font="%s" vertical="%s" bbox="%s" fontsize="%.3f">' %
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(enc(item.font.fontname), item.is_vertical(),
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item.get_bbox(), item.fontsize))
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self.write(item.text)
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self.outfp.write('</text>\n')
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elif isinstance(item, LTText):
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self.outfp.write('<text>%s</text>\n' % item.text)
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else:
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assert 0, item
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return
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page = PDFConverter.end_page(self, page)
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render(page)
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return
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def close(self):
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self.outfp.write('</pages>\n')
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return
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## HTMLConverter
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##
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class HTMLConverter(PDFConverter):
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def __init__(self, rsrc, outfp, codec='utf-8', pageno=1, laparams=None,
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scale=1, showpageno=True, pagepad=50):
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PDFConverter.__init__(self, rsrc, outfp, codec=codec, pageno=pageno, laparams=laparams)
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self.showpageno = showpageno
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self.pagepad = pagepad
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self.scale = scale
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self.outfp.write('<html><head>\n')
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self.outfp.write('<meta http-equiv="Content-Type" content="text/html; charset=%s">\n' %
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self.codec)
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self.outfp.write('</head><body>\n')
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self.yoffset = self.pagepad
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return
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def write_rect(self, color, width, x, y, w, h):
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self.outfp.write('<span style="position:absolute; border: %s %dpx solid; '
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'left:%dpx; top:%dpx; width:%dpx; height:%dpx;"></span>\n' %
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(color, width, x*self.scale, y*self.scale, w*self.scale, h*self.scale))
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return
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def end_page(self, page):
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def render(item):
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if isinstance(item, LTPage):
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self.yoffset += item.y1
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self.write_rect('gray', 1, item.x0, self.yoffset-item.y1, item.width, item.height)
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if self.showpageno:
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self.outfp.write('<div style="position:absolute; top:%dpx;">' %
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((self.yoffset-item.y1)*self.scale))
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self.outfp.write('<a name="%s">Page %s</a></div>\n' % (page.id, page.id))
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for child in item:
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render(child)
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elif isinstance(item, LTTextItem):
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if item.vertical:
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wmode = 'tb-rl'
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else:
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wmode = 'lr-tb'
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self.outfp.write('<span style="position:absolute; writing-mode:%s;'
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' left:%dpx; top:%dpx; font-size:%dpx;">' %
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(wmode, item.x0*self.scale, (self.yoffset-item.y1)*self.scale,
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item.fontsize*self.scale))
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self.write(item.text)
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self.outfp.write('</span>\n')
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if self.debug:
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self.write_rect('red', 1, item.x0, self.yoffset-item.y1, item.width, item.height)
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elif isinstance(item, LTPolygon):
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self.write_rect('black', 1, item.x0, self.yoffset-item.y1, item.width, item.height)
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elif isinstance(item, LTTextLine):
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for child in item:
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render(child)
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elif isinstance(item, LTTextBox):
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self.write_rect('blue', 1, item.x0, self.yoffset-item.y1, item.width, item.height)
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for child in item:
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render(child)
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elif isinstance(item, LTFigure):
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self.write_rect('green', 1, item.x0, self.yoffset-item.y1, item.width, item.height)
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for child in item:
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render(child)
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return
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page = PDFConverter.end_page(self, page)
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render(page)
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self.yoffset += self.pagepad
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return
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def close(self):
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self.outfp.write('<div style="position:absolute; top:0px;">Page: %s</div>\n' %
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', '.join('<a href="#%s">%s</a>' % (i,i) for i in xrange(1,self.pageno)))
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self.outfp.write('</body></html>\n')
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return
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## TextConverter
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##
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class TextConverter(PDFConverter):
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def __init__(self, rsrc, outfp, codec='utf-8', pageno=1, laparams=None,
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showpageno=False):
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PDFConverter.__init__(self, rsrc, outfp, codec=codec, pageno=pageno, laparams=laparams)
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self.showpageno = showpageno
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return
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def write(self, text):
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self.outfp.write(text.encode(self.codec, 'ignore'))
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return
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def end_page(self, page):
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def render(item):
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if isinstance(item, LTText):
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self.write(item.text)
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elif isinstance(item, LayoutContainer):
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for child in item:
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render(child)
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if isinstance(item, LTTextBox):
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self.write('\n')
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page = PDFConverter.end_page(self, page)
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if self.showpageno:
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self.write('Page %d\n' % page.id)
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render(page)
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self.write('\f')
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return
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