引用
Jiahua Huang: | <jhuangjiahua@gmail.com> |
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reply-to: | python-cn@googlegroups.com |
to: | python-cn@googlegroups.com |
date: | Sat, Aug 9, 2008 at 01:22 |
subject: | [CPyUG:61848] Re: 简单使用 Reportlab 生成中文 PDF 文档 |
URL: | http://wiki.woodpecker.org.cn/moin/MiscItems/2008-08-08 |
用 python-reportlab 将 rst 转换为中文 PDF
Author: | Jiahua Huang <jhuangjiahua@gmail.com> |
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Keywords: | RST, PDF |
License: | LGPL |
Requires: | docutils, reportlab |
python 里用 Reportlab 应该比用 tex、docbook、fop 合适, 不过 python-reportlab 默认没中文字体,也没中文换行,
分析
实际上新的 python-reportlab 已经有能力处理中文字体,也有了一个基本的 CJK Warp (breakLinesCJK),只是通常使用 python-reportlab 的程序都没有去注意。
现有 reportlab 程序主要问题就是:
1. 使用默认英文字体,而没考虑中文字 2. 使用默认英文折行,而没考虑中文长行
解决
那么,针对现有问题,可以考虑如下方向解决:
问题 | 解决 |
---|---|
没有中文字体 | 注册中文字体文泉驿正黑 |
默认不是中文字体 | 覆盖选字处理,一律用文泉驿正黑 |
默认不是 CJK 换行 | 覆盖折行处理,一律尝试 breakLinesCJK |
动手吧
拿把斧头直接砍 python-reportlab 当然省事, 不过系统的库修改了以后维护还真是麻烦,能不能不修改库本身呢?
既然 Python 是动态语言,可以运行中动态修改几乎一切东西, 那么运行时修改 reportlab 的类吧,只要在最终调用 reportlab 生成 PDF 前动态修改到自己要的就行
注册字体
因为主要是自己用,就硬编码使用自己喜欢的文泉驿正黑字体吧,
用 reportlab.pdfbase.pdfmetrics.registerFont 注册文泉驿:
import reportlab.rl_config reportlab.rl_config.warnOnMissingFontGlyphs = 0 import reportlab.pdfbase.pdfmetrics import reportlab.pdfbase.ttfonts reportlab.pdfbase.pdfmetrics.registerFont(reportlab.pdfbase.ttfonts.TTFont('song', '/usr/share/fonts/truetype/wqy/wqy-zenhei.ttf'))
改默认字体
先好歹让中文能显示吧,不如暂时让所有字体都用 文泉驿 (刚才把文泉驿注册为"song", 所以这里用 "song" 字体)
修改 reportlab.lib.fonts.ps2tt 和 reportlab.lib.fonts.tt2ps:
import reportlab.lib.fonts reportlab.lib.fonts.ps2tt = lambda psfn: ('song', 0, 0) reportlab.lib.fonts.tt2ps = lambda fn,b,i: 'song'
中文换行
为了省事,就不考虑哪些要 CJK 折行哪些不要了,直接 try: CJK 换行, except 再英文换行
修改 reportlab.platypus.Paragraph.wrap:
import reportlab.platypus def wrap(self, availWidth, availHeight): # work out widths array for breaking self.width = availWidth leftIndent = self.style.leftIndent first_line_width = availWidth - (leftIndent+self.style.firstLineIndent) - self.style.rightIndent later_widths = availWidth - leftIndent - self.style.rightIndent try: self.blPara = self.breakLinesCJK([first_line_width, later_widths]) except: self.blPara = self.breakLines([first_line_width, later_widths]) self.height = len(self.blPara.lines) * self.style.leading return (self.width, self.height) reportlab.platypus.Paragraph.wrap = wrap
完整的一段
就是将上边 3 个合起来:
import reportlab.rl_config reportlab.rl_config.warnOnMissingFontGlyphs = 0 import reportlab.pdfbase.pdfmetrics import reportlab.pdfbase.ttfonts reportlab.pdfbase.pdfmetrics.registerFont(reportlab.pdfbase.ttfonts.TTFont('song', '/usr/share/fonts/truetype/wqy/wqy-zenhei.ttf')) import reportlab.lib.fonts reportlab.lib.fonts.ps2tt = lambda psfn: ('song', 0, 0) reportlab.lib.fonts.tt2ps = lambda fn,b,i: 'song' ## for CJK Wrap import reportlab.platypus def wrap(self, availWidth, availHeight): # work out widths array for breaking self.width = availWidth leftIndent = self.style.leftIndent first_line_width = availWidth - (leftIndent+self.style.firstLineIndent) - self.style.rightIndent later_widths = availWidth - leftIndent - self.style.rightIndent try: self.blPara = self.breakLinesCJK([first_line_width, later_widths]) except: self.blPara = self.breakLines([first_line_width, later_widths]) self.height = len(self.blPara.lines) * self.style.leading return (self.width, self.height) reportlab.platypus.Paragraph.wrap = wrap
使用
具体的说了那么多,那实际怎么做呢?
前面说了, Python 是动态语言, 你可以将上边的代码随便插入到你的任何程序或模块里,只要在实际调用 reportlab 生成 PDF 前就可以了
- 直接点,在你的程序 import reportlab 前插入上边的代码
- 如果想让你原先的文件不要插入这突兀的语句,那可以将上边的代码写入到如 cjkreportlab.py, 在你需要用 reportlab 做中文 pdf 的代码里加个 import cjkreportlab
例子
这里给个修改的 rst2pdf.py:
#!/usr/bin/env python # -*- coding: utf-8 -*- import docutils.core,docutils.nodes,sys,re import sys import pprint from types import StringType from docutils import __version__, __version_details__, SettingsSpec from docutils import frontend, io, utils, readers, writers from docutils.frontend import OptionParser from docutils.transforms import Transformer import docutils.readers.doctree from urlparse import * from reportlab.platypus import * #from reportlab.platypus.para import Paragraph,FastPara,Para from reportlab.pdfbase.pdfmetrics import stringWidth from reportlab.lib.enums import * import reportlab.lib.colors as colors from reportlab.lib.units import * from reportlab.lib.pagesizes import * from copy import copy from cgi import escape try: from wordaxe.rl.paragraph import Paragraph from wordaxe.rl.styles import ParagraphStyle, getSampleStyleSheet except: print "No support for hyphenation, install wordaxe" ## 就是在这里添加前面说的代码啦 ############################ import reportlab.rl_config reportlab.rl_config.warnOnMissingFontGlyphs = 0 import reportlab.pdfbase.pdfmetrics import reportlab.pdfbase.ttfonts reportlab.pdfbase.pdfmetrics.registerFont(reportlab.pdfbase.ttfonts.TTFont('song', '/usr/share/fonts/truetype/wqy/wqy-zenhei.ttf')) import reportlab.lib.fonts reportlab.lib.fonts.ps2tt = lambda psfn: ('song', 0, 0) reportlab.lib.fonts.tt2ps = lambda fn,b,i: 'song' ## for CJK Wrap import reportlab.platypus def wrap(self, availWidth, availHeight): # work out widths array for breaking self.width = availWidth leftIndent = self.style.leftIndent first_line_width = availWidth - (leftIndent+self.style.firstLineIndent) - self.style.rightIndent later_widths = availWidth - leftIndent - self.style.rightIndent try: self.blPara = self.breakLinesCJK([first_line_width, later_widths]) except: self.blPara = self.breakLines([first_line_width, later_widths]) self.height = len(self.blPara.lines) * self.style.leading return (self.width, self.height) reportlab.platypus.Paragraph.wrap = wrap import sys reload(sys) sys.setdefaultencoding('utf8') ######################################################## ## style ########################################################################################## # Demo stylesheet module.for rst2pdf from reportlab.platypus import * import reportlab.lib.colors as colors from reportlab.lib.units import * from reportlab.pdfbase.ttfonts import TTFont from reportlab.lib.fonts import addMapping from reportlab.lib.styles import * from reportlab.lib.enums import * from reportlab.pdfbase import pdfmetrics try: from wordaxe.rl.paragraph import Paragraph from wordaxe.rl.styles import ParagraphStyle,getSampleStyleSheet except: print "No hyphenation support install wordaxe" import os # Set these, and then **maybe** think of setting the stylesheets below # if you want finer control stdFont = 'song' stdBold = 'song' stdItalic = 'song' stdBoldItalic = 'song' stdMono = 'song' # You can embed your own fonts and use them later if you want if os.path.isfile('wrabbit/WHITRABT.TTF'): pdfmetrics.registerFont(TTFont('WhiteRabbit', 'wrabbit/WHITRABT.TTF')) addMapping('WhiteRabbit', 0, 0, 'WhiteRabbit') #normal addMapping('WhiteRabbit', 0, 1, 'WhiteRabbit') #italic addMapping('WhiteRabbit', 1, 0, 'WhiteRabbit') #bold addMapping('WhiteRabbit', 1, 1, 'WhiteRabbit') #italic and bold stdMono = 'WhiteRabbit' def getStyleSheet(): """Returns a stylesheet object""" stylesheet = StyleSheet1() stylesheet.add(ParagraphStyle(name='Normal', fontName=stdFont, bulletFontName=stdFont, fontSize=10, bulletFontSize=10, leading=12, language='EN', hyphenation=True )) stylesheet.add(ParagraphStyle(name='BodyText', parent=stylesheet['Normal'], spaceBefore=6, language='EN', hyphenation=True )) stylesheet.add(ParagraphStyle(name='Footer', parent=stylesheet['Normal'], backColor='#EFEFEF', alignment=TA_CENTER) ) stylesheet.add(ParagraphStyle(name='Attribution', parent=stylesheet['BodyText'], alignment=TA_RIGHT) ) stylesheet.add(ParagraphStyle(name='FieldName', parent=stylesheet['BodyText'], alignment=TA_RIGHT, fontName=stdBold, bulletFontName=stdBold, ) ) stylesheet.add(ParagraphStyle(name='Rubric', parent=stylesheet['BodyText'], textColor=colors.darkred, alignment=TA_CENTER) ) stylesheet.add(ParagraphStyle(name='Italic', parent=stylesheet['BodyText'], fontName = stdItalic, bulletFontName=stdItalic) ) stylesheet.add(ParagraphStyle(name='Title', parent=stylesheet['Normal'], fontName = stdBold, bulletFontName=stdBold, fontSize=18, bulletFontSize=18, leading=22, alignment=TA_CENTER, spaceAfter=6), alias='title') stylesheet.add(ParagraphStyle(name='Subtitle', parent=stylesheet['Title'], fontSize=14, bulletFontSize=14), alias='subtitle') stylesheet.add(ParagraphStyle(name='Heading1', parent=stylesheet['Normal'], fontName = stdBold, bulletFontName=stdBold, fontSize=18, bulletFontSize=18, leading=22, keepWithNext=True, spaceAfter=6), alias='h1') stylesheet.add(ParagraphStyle(name='Heading2', parent=stylesheet['Normal'], fontName = stdBold, bulletFontName=stdBold, fontSize=14, bulletFontSize=14, leading=18, spaceBefore=12, keepWithNext=True, spaceAfter=6), alias='h2') stylesheet.add(ParagraphStyle(name='Heading3', parent=stylesheet['Normal'], fontName = stdBoldItalic, bulletFontName=stdBoldItalic, fontSize=12, bulletFontSize=12, leading=14, spaceBefore=12, keepWithNext=True, spaceAfter=6), alias='h3') stylesheet.add(ParagraphStyle(name='Heading4', parent=stylesheet['Normal'], fontName = stdBoldItalic, bulletFontName=stdBoldItalic, fontSize=12, bulletFontSize=12, leading=14, spaceBefore=12, keepWithNext=True, spaceAfter=6), alias='h4') stylesheet.add(ParagraphStyle(name='Bullet', parent=stylesheet['Normal'], firstLineIndent=0, spaceBefore=3), alias='bu') stylesheet.add(ParagraphStyle(name='Definition', parent=stylesheet['Normal'], firstLineIndent=0, leftIndent=36, bulletIndent=0, spaceBefore=6, fontName=stdBold, bulletFontName=stdBold), alias='df') stylesheet.add(ParagraphStyle(name='Code', parent=stylesheet['Normal'], fontName=stdMono, bulletFontName=stdMono, fontSize=8, bulletFontSize=8, leading=8.8, firstLineIndent=0, leftIndent=12, spaceBefore=4)) return stylesheet # Some table styles used for pieces of the document tstyles={} # Used for regular tables tstyleNorm = [ ('VALIGN',(0,0),(-1,-1),'TOP'), ('INNERGRID', (0,0), (-1,-1), 0.25, colors.black), ('BOX', (0,0), (-1,-1), 0.25, colors.black), ] # Header row in tables tstyleHead = ('BACKGROUND',(0,0),(-1,0),colors.yellow) tstyles['Normal']=TableStyle(tstyleNorm) # Used for field lists tstyles['Field']=TableStyle([ ('VALIGN',(0,0),(-1,-1),'TOP'), ('ALIGNMENT',(0,0),(1,-1),'RIGHT'), ]) fieldlist_lwidth=3*cm # Used for endnotes tstyles['Endnote']=TableStyle([ ('VALIGN',(0,0),(-1,-1),'TOP'), ('ALIGNMENT',(0,0),(1,-1),'RIGHT'), ]) # Left column of the endnote. The content of the note takes the rest of # the available space endnote_lwidth=2*cm # Used for sidebars tstyles['Sidebar']=TableStyle([ ('VALIGN',(0,0),(-1,-1),'TOP'), ('BACKGROUND',(0,0),(-1,-1),colors.lightyellow), ]) ################################################################################################### styles=getStyleSheet() try: import wordaxe from wordaxe.PyHnjHyphenator import PyHnjHyphenator try: wordaxe.hyphRegistry['EN'] = PyHnjHyphenator('en_US',5) except: wordaxe.hyphRegistry['EN'] = PyHnjHyphenator('en_US',5,purePython=True) except: print "No support for hyphenation, install wordaxe" # This is A4 paper, change it as you wish pw,ph=ps=A4 # Margins tm=2*cm bm=2*cm lm=3*cm rm=1.5*cm # tw is the text width. # We need it to calculate header-footer height # and compress literal blocks. tw=pw-lm-rm page_break_level=0 marks="#=-_*^>%&|" lowerroman=['i','ii','iii','iv','v','vi','vii','viii','ix','x','xi'] loweralpha="abcdefghijklmnopqrstuvwxyz" class MyIndenter(Indenter): # Bugs in reportlab? def draw(self): pass width=0 height=0 def depth (node): if node.parent==None: return 0 else: return 1+depth(node.parent) decoration = {'header':None, 'footer':None, 'endnotes':[]} def gather_pdftext (node, depth, in_line_block=False,replaceEnt=True): return ''.join([gen_pdftext(n,depth,in_line_block,replaceEnt) for n in node.children ]) def gen_pdftext(node, depth, in_line_block=False,replaceEnt=True): pre="" post="" if isinstance (node, docutils.nodes.paragraph) \ or isinstance (node, docutils.nodes.title) \ or isinstance (node, docutils.nodes.subtitle) \ : node.pdftext=gather_pdftext(node,depth)+"\n" elif isinstance (node, docutils.nodes.Text): node.pdftext=node.astext() if replaceEnt: node.pdftext=escape(node.pdftext,True) node.pdftext=pre+node.pdftext+post elif isinstance (node, docutils.nodes.strong): pre="<b>" post="</b>" node.pdftext=gather_pdftext(node,depth) if replaceEnt: node.pdftext=escape(node.pdftext,True) node.pdftext=pre+node.pdftext+post elif isinstance (node, docutils.nodes.emphasis): pre="<i>" post="</i>" node.pdftext=gather_pdftext(node,depth) if replaceEnt: node.pdftext=escape(node.pdftext,True) node.pdftext=pre+node.pdftext+post elif isinstance (node, docutils.nodes.literal): pre='<font face="%s">'%styles['Code'].fontName post="</font>" node.pdftext=gather_pdftext(node,depth) if replaceEnt: node.pdftext=escape(node.pdftext,True) node.pdftext=pre+node.pdftext+post elif isinstance (node, docutils.nodes.superscript): pre='<super>' post="</super>" node.pdftext=gather_pdftext(node,depth) if replaceEnt: node.pdftext=escape(node.pdftext,True) node.pdftext=pre+node.pdftext+post elif isinstance (node, docutils.nodes.subscript): pre='<sub>' post="</sub>" node.pdftext=gather_pdftext(node,depth) if replaceEnt: node.pdftext=escape(node.pdftext,True) node.pdftext=pre+node.pdftext+post elif isinstance (node, docutils.nodes.title_reference): # FIXME needs to work as a link pre='<font color="blue">' post="</font>" node.pdftext=gather_pdftext(node,depth) if replaceEnt: node.pdftext=escape(node.pdftext,True) node.pdftext=pre+node.pdftext+post elif isinstance (node, docutils.nodes.reference) : pre='<font color="blue">' post="</font>" uri=node.get('refuri') if uri: if urlparse(uri)[0]: pre+=u'<a href="%s">'%uri post='</a>'+post else: uri=node.get('refid') if uri: pre+=u'<a href="#%s">'%uri post='</a>'+post node.pdftext=node.astext() if replaceEnt: node.pdftext=escape(node.pdftext,True) node.pdftext=pre+node.pdftext+post elif isinstance (node, docutils.nodes.option_string) \ or isinstance (node, docutils.nodes.option_argument) \ : node.pdftext=node.astext() if replaceEnt: node.pdftext=escape(node.pdftext,True) elif isinstance (node, docutils.nodes.header) \ or isinstance (node, docutils.nodes.footer) \ : node.pdftext=gather_pdftext(node,depth) if replaceEnt: node.pdftext=escape(node.pdftext,True) node.pdftext=pre+node.pdftext+post elif isinstance (node, docutils.nodes.system_message) \ or isinstance (node, docutils.nodes.problematic) \ : sys.stderr.write (node.astext()+"\n") sys.stderr.flush() pre='<font color="red">' post="</font>" node.pdftext=gather_pdftext(node,depth) if replaceEnt: node.pdftext=escape(node.pdftext,True) node.pdftext=pre+node.pdftext+post elif isinstance (node, docutils.nodes.generated): node.pdftext=gather_pdftext(node,depth) if replaceEnt: node.pdftext=escape(node.pdftext,True) node.pdftext=pre+node.pdftext+post elif isinstance (node, docutils.nodes.image): node.pdftext='<img src="%s" />'%node.get('uri') elif isinstance (node, docutils.nodes.footnote_reference): # Fixme link to the right place node.pdftext=u'<super><font color="blue">%s</font></super>'%node.astext() elif isinstance (node, docutils.nodes.citation_reference): # Fixme link to the right place node.pdftext=u'<font color="blue">[%s]</font>'%node.astext() # FIXME nodes we are ignoring for the moment elif isinstance (node, docutils.nodes.target): # FIXME: make it work as a target for links node.pdftext=gather_pdftext(node,depth) if replaceEnt: node.pdftext=escape(node.pdftext,True) else: print "Unkn. node (gen_pdftext): ", node.__class__ print node #print node.transform sys.exit(1) return node.pdftext def PreformattedFit(text,style): """Preformatted section that gets horizontally compressed if needed.""" w=max(map(lambda line:stringWidth(line,style.fontName,style.fontSize),text.splitlines())) mw=tw-style.leftIndent-style.rightIndent if w>mw: style=copy(style) f=max((0.375,mw/w)) style.fontSize*=f style.leading*=f return Preformatted(text,style) def gen_elements(node, depth, in_line_block=False, style=styles['BodyText']): global decoration if isinstance (node, docutils.nodes.document): node.elements=gather_elements(node,depth,style=style) ####################### ## Tables ####################### elif isinstance (node, docutils.nodes.table): node.elements=gather_elements(node,depth) elif isinstance (node, docutils.nodes.tgroup): rows=[] hasHead=False for n in node.children: if isinstance (n,docutils.nodes.thead): hasHead=True for row in n.children: r=[] for cell in row.children: r.append(cell) rows.append(r) elif isinstance (n,docutils.nodes.tbody): for row in n.children: r=[] for cell in row.children: r.append(cell) rows.append(r) spans=filltable (rows) data=[] for row in rows: r=[] for cell in row: if isinstance(cell,str): r.append("") else: r.append(gather_elements(cell,depth)) data.append(r) st=spans+tstyleNorm if hasHead: st+=[tstyleHead] node.elements=[Table(data,style=TableStyle(st))] elif isinstance (node, docutils.nodes.title): # Special cases: (Not sure this is right ;-) if isinstance (node.parent, docutils.nodes.document): # FIXME maybe make it a coverpage? node.elements=[Paragraph(gen_pdftext(node,depth), styles['Title'])] elif isinstance (node.parent, docutils.nodes.topic): # FIXME style correctly node.elements=[Paragraph(gen_pdftext(node,depth), styles['Heading3'])] elif isinstance (node.parent, docutils.nodes.admonition) or \ isinstance (node.parent, docutils.nodes.sidebar): node.elements=[Paragraph(gen_pdftext(node,depth), styles['Heading3'])] else: node.elements=[Paragraph(gen_pdftext(node,depth), styles['Heading%d'%min(depth,3)])] elif isinstance (node, docutils.nodes.subtitle): if isinstance (node.parent,docutils.nodes.sidebar): node.elements=[Paragraph(gen_pdftext(node,depth), styles['Heading4'])] elif isinstance (node.parent,docutils.nodes.document): node.elements=[Paragraph(gen_pdftext(node,depth), styles['Subtitle'])] elif isinstance (node, docutils.nodes.paragraph): node.elements=[Paragraph(gen_pdftext(node,depth), style)] elif isinstance (node, docutils.nodes.docinfo): # A docinfo usually contains several fields. # We'll render it as a series of elements, one field each. node.elements=gather_elements(node,depth,style=style) elif isinstance (node, docutils.nodes.field): # A field has two child elements, a field_name and a field_body. # We render as a two-column table, left-column is right-aligned, # bold, and much smaller fn=Paragraph(gather_pdftext(node.children[0],depth)+":",style=styles['FieldName']) fb=gen_elements(node.children[1],depth) node.elements=[Table([[fn,fb]],style=tstyles['Field'],colWidths=[fieldlist_lwidth,None])] elif isinstance (node, docutils.nodes.decoration): # This is a tricky one. We need to switch our document's # page templates based on this. If decoration contains a # header and/or a footer, we need to use those # right now, we avoid trouble. # FIXME Implement node.elements=gather_elements(node,depth,style=style) elif isinstance (node, docutils.nodes.header): decoration['header']=Paragraph(gather_pdftext(node,depth),style=styles['Footer']) node.elements=[] elif isinstance (node, docutils.nodes.footer): decoration['footer']=Paragraph(gather_pdftext(node,depth),style=styles['Footer']) node.elements=[] elif isinstance (node, docutils.nodes.author): if isinstance (node.parent,docutils.nodes.authors): # Is only one of multiple authors. Return a paragraph node.elements=[Paragraph(gather_pdftext(node,depth), style=style)] else: # A single author: works like a field fb=gather_pdftext(node,depth) node.elements=[Table([[Paragraph("Author:",style=styles['FieldName']), Paragraph(fb,style) ]],style=tstyles['Field'],colWidths=[fieldlist_lwidth,None])] elif isinstance (node, docutils.nodes.authors): # Multiple authors. Create a two-column table. Author references on the right. td=[[Paragraph("Authors:",style=styles['FieldName']),gather_elements(node,depth,style=style)]] node.elements=[Table(td,style=tstyles['Field'],colWidths=[fieldlist_lwidth,None])] elif isinstance (node, docutils.nodes.organization): fb=gather_pdftext(node,depth) t=Table([[Paragraph("Organization:",style=styles['FieldName']), Paragraph(fb,style) ]],style=tstyles['Field'],colWidths=[fieldlist_lwidth,None]) node.elements=[t] elif isinstance (node, docutils.nodes.contact): fb=gather_pdftext(node,depth) t=Table([[ Paragraph("Contact:",style=styles['FieldName']), Paragraph(fb,style) ]],style=tstyles['Field'],colWidths=[fieldlist_lwidth,None]) node.elements=[t] elif isinstance (node, docutils.nodes.address): fb=gather_pdftext(node,depth) t=Table([[ Paragraph("Address:",style=styles['FieldName']), Paragraph(fb,style) ]],style=tstyles['Field'],colWidths=[fieldlist_lwidth,None]) node.elements=[t] elif isinstance (node, docutils.nodes.version): fb=gather_pdftext(node,depth) t=Table([[ Paragraph("Version:",style=styles['FieldName']), Paragraph(fb,style) ]],style=tstyles['Field'],colWidths=[fieldlist_lwidth,None]) node.elements=[t] elif isinstance (node, docutils.nodes.revision): fb=gather_pdftext(node,depth) t=Table([[ Paragraph("Revision:",style=styles['FieldName']), Paragraph(fb,style) ]],style=tstyles['Field'],colWidths=[fieldlist_lwidth,None]) node.elements=[t] elif isinstance (node, docutils.nodes.status): fb=gather_pdftext(node,depth) t=Table([[ Paragraph("Version:",style=styles['FieldName']), Paragraph(fb,style) ]],style=tstyles['Field'],colWidths=[fieldlist_lwidth,None]) node.elements=[t] elif isinstance (node, docutils.nodes.date): fb=gather_pdftext(node,depth) t=Table([[ Paragraph("Date:",style=styles['FieldName']), Paragraph(fb,style) ]],style=tstyles['Field'],colWidths=[fieldlist_lwidth,None]) node.elements=[t] elif isinstance (node, docutils.nodes.copyright): fb=gather_pdftext(node,depth) t=Table([[Paragraph("Copyright:",style=styles['FieldName']), Paragraph(fb,style) ]],style=tstyles['Field'],colWidths=[fieldlist_lwidth,None]) node.elements=[t] elif isinstance (node, docutils.nodes.topic) \ or isinstance (node, docutils.nodes.field_body) \ : node.elements=gather_elements(node,depth,style=style) elif isinstance (node, docutils.nodes.section): if depth<page_break_level: node.elements=[PageBreak()]+gather_elements(node,depth+1) else: node.elements=gather_elements(node,depth+1) elif isinstance (node, docutils.nodes.bullet_list) \ or isinstance (node, docutils.nodes.enumerated_list) \ or isinstance (node, docutils.nodes.definition_list) \ or isinstance (node, docutils.nodes.option_list) \ or isinstance (node, docutils.nodes.field_list) \ or isinstance (node, docutils.nodes.definition) \ : node.elements=gather_elements(node,depth,style=style) elif isinstance (node, docutils.nodes.option_list_item): og = gather_elements(node.children[0],depth,style) desc = gather_elements(node.children[1],depth,style) node.elements=[Table([[og,desc]],style=tstyles['Field'])] elif isinstance (node, docutils.nodes.definition_list_item): # I need to catch the classifiers here tt=[] dt=[] for n in node.children: if isinstance(n,docutils.nodes.term) or \ isinstance(n,docutils.nodes.classifier) : tt.append(gather_pdftext(n,depth,style)) else: dt=dt+gen_elements(n,depth,style) node.elements=[Paragraph(':'.join(tt),style),MyIndenter(left=10)]+dt+[MyIndenter(left=-10)] elif isinstance (node, docutils.nodes.list_item): # A list_item is a table of two columns. # The left one is the bullet itself, the right is the # item content. This way we can nest them. el=gather_elements(node,depth,style=style) b="" if node.parent.get('bullet') or isinstance(node.parent,docutils.nodes.bullet_list): # FIXME: use correct bullet symbols, check inter-paragraph spacing b=str(node.parent.get('bullet')) if b=="None": b="" elif node.parent.get ('enumtype')=='arabic': b=str(node.parent.children.index(node)+1)+'.' elif node.parent.get ('enumtype')=='lowerroman': b=str(lowerroman[node.parent.children.index(node)])+'.' elif node.parent.get ('enumtype')=='upperroman': b=str(lowerroman[node.parent.children.index(node)].upper())+'.' elif node.parent.get ('enumtype')=='loweralpha': b=str(loweralpha[node.parent.children.index(node)])+'.' elif node.parent.get ('enumtype')=='upperalpha': b=str(loweralpha[node.parent.children.index(node)].upper())+'.' else: print "Unknown kind of list_item" print node.parent sys.exit(1) el[0].bulletText = b node.elements=el elif isinstance (node, docutils.nodes.transition): node.elements=[Separation()] elif isinstance (node, docutils.nodes.system_message) \ or isinstance (node, docutils.nodes.problematic) \ : # FIXME show the error in the document, red, whatever sys.stderr.write (node.astext()+"\n") sys.stderr.flush() node.elements=[] elif isinstance (node, docutils.nodes.block_quote): node.elements=[MyIndenter(left=20)]+gather_elements(node,depth,style)+[MyIndenter(left=-20)] elif isinstance (node, docutils.nodes.attribution): node.elements=[Paragraph(gather_pdftext(node,depth),styles['Attribution'])] elif isinstance (node, docutils.nodes.comment): # Class that generates no output node.elements=[] elif isinstance (node, docutils.nodes.line_block): # Obsolete? Let's do something anyway. # FIXME: indent or not? qstyle=copy(style) qstyle.leftIndent+=30 node.elements=gather_elements(node,depth,style=qstyle) elif isinstance (node, docutils.nodes.line): # All elements in one line node.elements=[Paragraph(gather_pdftext(node,depth),style=style)] elif isinstance (node, docutils.nodes.literal_block) \ or isinstance (node, docutils.nodes.doctest_block) \ or isinstance (node, docutils.nodes.option) \ : node.elements=[PreformattedFit(gather_pdftext(node,depth,replaceEnt=False),styles['Code'])] elif isinstance (node, docutils.nodes.attention) \ or isinstance (node, docutils.nodes.caution) \ or isinstance (node, docutils.nodes.danger) \ or isinstance (node, docutils.nodes.error) \ or isinstance (node, docutils.nodes.hint) \ or isinstance (node, docutils.nodes.important) \ or isinstance (node, docutils.nodes.note) \ or isinstance (node, docutils.nodes.tip) \ or isinstance (node, docutils.nodes.warning) \ or isinstance (node, docutils.nodes.admonition) \ : node.elements=[Paragraph(node.tagname.title(),style=styles['Heading3'])]+gather_elements(node,depth,style=style) elif isinstance (node, docutils.nodes.image): # FIXME handle all the other attributes i=Image(filename=str(node.get("uri"))) if node.get('align'): i.hAlign=node.get('align').upper() node.elements=[i] elif isinstance (node, docutils.nodes.figure): # The sub-elements are the figure and the caption, and't ugly if # they separate node.elements=[KeepTogether(gather_elements(node,depth,style=style))] elif isinstance (node, docutils.nodes.caption): node.elements=[Paragraph('<i>'+gather_pdftext(node,depth)+'</i>',style=style)] elif isinstance (node, docutils.nodes.legend): node.elements=gather_elements(node,depth,style=style) elif isinstance (node, docutils.nodes.sidebar): node.elements=[Table([[ gather_elements(node,depth,style=style)]],style=tstyles['Sidebar'])] elif isinstance (node, docutils.nodes.rubric): node.elements=[Paragraph(gather_pdftext(node,depth),styles['Rubric'])] elif isinstance (node, docutils.nodes.compound): # FIXME think if this is even implementable node.elements=gather_elements(node,depth,style) elif isinstance (node, docutils.nodes.container): # FIXME think if this is even implementable node.elements=gather_elements(node,depth,style) elif isinstance (node, docutils.nodes.substitution_definition): node.elements=[] elif isinstance (node, docutils.nodes.tbody): rows=[gen_elements(n,depth) for n in node.children] t=[] for r in rows: if not r: continue t.append(r) node.elements=[Table(t,style=tstyles['Normal'])] elif isinstance (node, docutils.nodes.footnote): # It seems a footnote contains a label and a series of elements label=Paragraph(gather_pdftext(node.children[0],depth),style) contents=gather_elements(node,depth,style)[1:] decoration['endnotes'].append([label,contents]) node.elements=[] elif isinstance (node, docutils.nodes.label): node.elements=[Paragraph(gather_pdftext(node,depth),style)] elif isinstance (node, docutils.nodes.Text): node.elements=[Paragraph(gather_pdftext(node,depth),style)] elif isinstance (node, docutils.nodes.entry): node.elements=gather_elements(node,depth,style) # FIXME nodes we are ignoring for the moment elif isinstance (node, docutils.nodes.target) \ or isinstance (node, docutils.nodes.footnote) \ or isinstance (node, docutils.nodes.citation) \ or isinstance (node, docutils.nodes.reference) \ or isinstance (node, docutils.nodes.raw) \ : node.elements=[] else: print "Unkn. node (gen_elements): ", node.__class__ print node sys.exit(1) # set anchors for internal references for id in node['ids']: node.elements.insert( node.elements and isinstance(node.elements[0], PageBreak) and 1 or 0, Paragraph('<a name="%s"/>'%id,style)) return node.elements def gather_elements (node, depth, in_line_block=False,style=styles['BodyText']): r=[] for n in node.children: r=r+(gen_elements(n,depth,in_line_block,style=style)) return r class Separation(Flowable): " A simple <hr>-like thingie" def wrap(self,w,h): self.w=w return (w,1*cm) def draw(self): self.canv.line(0,0.5*cm,self.w,0.5*cm) class FancyPage(PageTemplate): def __init__(self,_id,pw,ph,tm,bm,lm,rm,hh,fh,head,foot): tw=pw-lm-rm #textframe=Frame(lm,tm+hh,tw,ph-tm-bm-hh-fh) textframe=Frame(lm,tm+hh,tw,ph-tm-bm-hh-fh,topPadding=hh,bottomPadding=fh) self.head=head self.hx=lm self.hy=ph-tm self.foot=foot self.fx=lm self.fy=bm PageTemplate.__init__(self,_id,[textframe]) def beforeDrawPage(self,canv,doc): if self.head: self.head.drawOn(canv,self.hx,self.hy) if self.foot: self.foot.drawOn(canv,self.fx,self.fy) def filltable (rows): # If there is a multicol cell, we need to insert Continuation Cells # to make all rows the same length for y in range(0,len( rows)): for x in range (0,len(rows[y])): cell=rows[y][x] if isinstance (cell,str): continue if cell.get("morecols"): for i in range(0,cell.get("morecols")): rows[y].insert(x+1,"") for y in range(0,len( rows)): for x in range (0,len(rows[y])): cell=rows[y][x] if isinstance (cell,str): continue if cell.get("morerows"): for i in range(0,cell.get("morerows")): rows[y+i+1].insert(x,"") # Create spans list for reportlab's table style spans=[] for y in range(0,len( rows)): for x in range (0,len(rows[y])): cell=rows[y][x] if isinstance (cell,str): continue if cell.get("morecols"): mc=cell.get("morecols") else: mc=0 if cell.get("morerows"): mr=cell.get("morerows") else: mr=0 if mc or mr: spans.append(('SPAN',(x,y),(x+mc,y+mr))) return spans if __name__ == "__main__": input=open(sys.argv[1]).read() import docutils.core doc=docutils.core.publish_doctree(input) elements=gen_elements(doc,0) endnotes = decoration['endnotes'] if endnotes: elements.append(Spacer(1,2*cm)) elements.append(Separation()) for n in decoration['endnotes']: elements.append(Table([[n[0],n[1]]],style=tstyles['Endnote'],colWidths=[endnote_lwidth,None])) head=decoration['header'] foot=decoration['footer'] if head: hh=head.wrap(tw,ph)[1] else: hh=0 if foot: fh=foot.wrap(tw,ph)[1] else: fh=0 # So, now, create the FancyPage with the right sizes and elements FP=FancyPage("fancypage",pw,ph,tm,bm,lm,rm,hh,fh,head,foot) # A basic document for us to write to 'rl_hello_platypus.pdf' pdfdoc = BaseDocTemplate(sys.argv[1]+'.pdf',pageTemplates=[FP],showBoundary=0,pagesize=ps) pdfdoc.build(elements)
唔,您可以拿本 RST 文件来测试 rst2pdf 中文,注意编码得是 utf8
- 命令::
- ./rst2pdf.py XXX.rst
其他问题
现存问题:
1. 硬编码的 文泉驿正黑字体 路径不能灵活适应不同系统 2. 文泉驿正黑中文没有粗体和斜体 3. 由于没有选字,而是一律文泉驿字体,使得英文也没有了粗斜体
您说,本文做的 pdf 没书签没目录?
唔,这是这个 rst2pdf 程序原先的问题,本文只解决 python-reportlab 中文显示和换行。
还有其他问题么? 请洽 python-cn 的老大 Zoomq 大妈 (Zoom. Quiet <zoom.quiet@gmail.com>) ~ 奥运进行时,请尽情搔扰~