#Copyright ReportLab Europe Ltd. 2000-2004 #see license.txt for license details #history http://www.reportlab.co.uk/cgi-bin/viewcvs.cgi/public/reportlab/trunk/reportlab/platypus/paragraph.py __version__=''' $Id: paragraph.py 2456 2004-10-19 17:52:20Z rgbecker $ ''' from string import split, strip, join, whitespace, find from operator import truth from types import StringType, ListType from reportlab.pdfbase.pdfmetrics import stringWidth from reportlab.platypus.paraparser import ParaParser from reportlab.platypus.flowables import Flowable from reportlab.lib.colors import Color from reportlab.lib.enums import TA_LEFT, TA_RIGHT, TA_CENTER, TA_JUSTIFY from reportlab.lib.utils import _className from copy import deepcopy from reportlab.lib.abag import ABag class ParaLines(ABag): """ class ParaLines contains the broken into lines representation of Paragraphs kind=0 Simple fontName, fontSize, textColor apply to whole Paragraph lines [(extraSpace1,words1),....,(extraspaceN,wordsN)] kind==1 Complex lines [FragLine1,...,FragLineN] """ class FragLine(ABag): """class FragLine contains a styled line (ie a line with more than one style) extraSpace unused space for justification only wordCount 1+spaces in line for justification purposes words [ParaFrags] style text lumps to be concatenated together fontSize maximum fontSize seen on the line; not used at present, but could be used for line spacing. """ #our one and only parser # XXXXX if the parser has any internal state using only one is probably a BAD idea! _parser=ParaParser() def _lineClean(L): return join(filter(truth,split(strip(L)))) def cleanBlockQuotedText(text,joiner=' '): """This is an internal utility which takes triple- quoted text form within the document and returns (hopefully) the paragraph the user intended originally.""" L=filter(truth,map(_lineClean, split(text, '\n'))) return join(L, joiner) def setXPos(tx,dx): if dx>1e-6 or dx<-1e-6: tx.setXPos(dx) def _leftDrawParaLine( tx, offset, extraspace, words, last=0): setXPos(tx,offset) tx._textOut(join(words),1) setXPos(tx,-offset) return offset def _centerDrawParaLine( tx, offset, extraspace, words, last=0): m = offset + 0.5 * extraspace setXPos(tx,m) tx._textOut(join(words),1) setXPos(tx,-m) return m def _rightDrawParaLine( tx, offset, extraspace, words, last=0): m = offset + extraspace setXPos(tx,m) tx._textOut(join(words),1) setXPos(tx,-m) return m def _justifyDrawParaLine( tx, offset, extraspace, words, last=0): setXPos(tx,offset) text = join(words) if last: #last one, left align tx._textOut(text,1) else: nSpaces = len(words)-1 if nSpaces: tx.setWordSpace(extraspace / float(nSpaces)) tx._textOut(text,1) tx.setWordSpace(0) else: tx._textOut(text,1) setXPos(tx,-offset) return offset def _putFragLine(tx,words): cur_x = 0 for f in words: if hasattr(f,'cbDefn'): func = getattr(tx._canvas,f.cbDefn.name,None) if not func: raise AttributeError, "Missing %s callback attribute '%s'" % (f.cbDefn.kind,f.cbDefn.name) func(tx._canvas,f.cbDefn.kind,f.cbDefn.label) if f is words[-1]: tx._textOut('',1) else: if (tx._fontname,tx._fontsize)!=(f.fontName,f.fontSize): tx._setFont(f.fontName, f.fontSize) if tx.XtraState.textColor!=f.textColor: tx.XtraState.textColor = f.textColor tx.setFillColor(f.textColor) if tx.XtraState.rise!=f.rise: tx.XtraState.rise=f.rise tx.setRise(f.rise) tx._textOut(f.text,f is words[-1]) # cheap textOut txtlen = tx._canvas.stringWidth(f.text, tx._fontname, tx._fontsize) if not tx.XtraState.underline and f.underline: tx.XtraState.underline = 1 tx.XtraState.underline_x = cur_x elif tx.XtraState.underline and not f.underline: tx.XtraState.underline = 0 spacelen = tx._canvas.stringWidth(' ', tx._fontname, tx._fontsize) tx.XtraState.underlines.append( (tx.XtraState.underline_x, cur_x-spacelen) ) cur_x = cur_x + txtlen if tx.XtraState.underline: tx.XtraState.underlines.append( (tx.XtraState.underline_x, cur_x) ) def _leftDrawParaLineX( tx, offset, line, last=0): setXPos(tx,offset) _putFragLine(tx, line.words) setXPos(tx,-offset) return offset def _centerDrawParaLineX( tx, offset, line, last=0): m = offset+0.5*line.extraSpace setXPos(tx,m) _putFragLine(tx, line.words) setXPos(tx,-m) return m def _rightDrawParaLineX( tx, offset, line, last=0): m = offset+line.extraSpace setXPos(tx,m) _putFragLine(tx, line.words) setXPos(tx,-m) return m def _justifyDrawParaLineX( tx, offset, line, last=0): setXPos(tx,offset) if last: #last one, left align _putFragLine(tx, line.words) else: nSpaces = line.wordCount - 1 if nSpaces: tx.setWordSpace(line.extraSpace / float(nSpaces)) _putFragLine(tx, line.words) tx.setWordSpace(0) else: _putFragLine(tx, line.words) setXPos(tx,-offset) return offset try: from _rl_accel import _sameFrag except ImportError: try: from reportlab.lib._rl_accel import _sameFrag except ImportError: def _sameFrag(f,g): 'returns 1 if two ParaFrags map out the same' if hasattr(f,'cbDefn') or hasattr(g,'cbDefn'): return 0 for a in ('fontName', 'fontSize', 'textColor', 'rise', 'underline'): if getattr(f,a)!=getattr(g,a): return 0 return 1 def _getFragWords(frags): ''' given a Parafrag list return a list of fragwords [[size, (f00,w00), ..., (f0n,w0n)],....,[size, (fm0,wm0), ..., (f0n,wmn)]] each pair f,w represents a style and some string each sublist represents a word ''' R = [] W = [] n = 0 for f in frags: text = f.text #del f.text # we can't do this until we sort out splitting # of paragraphs if text!='': S = split(text) if S==[]: S = [''] if W!=[] and text[0] in whitespace: W.insert(0,n) R.append(W) W = [] n = 0 for w in S[:-1]: W.append((f,w)) n = n + stringWidth(w, f.fontName, f.fontSize) W.insert(0,n) R.append(W) W = [] n = 0 w = S[-1] W.append((f,w)) n = n + stringWidth(w, f.fontName, f.fontSize) if text[-1] in whitespace: W.insert(0,n) R.append(W) W = [] n = 0 elif hasattr(f,'cbDefn'): W.append((f,'')) if W!=[]: W.insert(0,n) R.append(W) return R def _split_blParaSimple(blPara,start,stop): f = blPara.clone() for a in ('lines', 'kind', 'text'): if hasattr(f,a): delattr(f,a) f.words = [] for l in blPara.lines[start:stop]: for w in l[1]: f.words.append(w) return [f] def _split_blParaHard(blPara,start,stop): f = [] lines = blPara.lines[start:stop] for l in lines: for w in l.words: f.append(w) if l is not lines[-1]: i = len(f)-1 while hasattr(f[i],'cbDefn'): i = i-1 g = f[i] if g.text and g.text[-1]!=' ': g.text = g.text+' ' return f def _drawBullet(canvas, offset, cur_y, bulletText, style): '''draw a bullet text could be a simple string or a frag list''' tx2 = canvas.beginText(style.bulletIndent, cur_y) tx2.setFont(style.bulletFontName, style.bulletFontSize) tx2.setFillColor(hasattr(style,'bulletColor') and style.bulletColor or style.textColor) if type(bulletText) is StringType: tx2.textOut(bulletText) else: for f in bulletText: tx2.setFont(f.fontName, f.fontSize) tx2.setFillColor(f.textColor) tx2.textOut(f.text) canvas.drawText(tx2) #AR making definition lists a bit less ugly #bulletEnd = tx2.getX() bulletEnd = tx2.getX() + style.bulletFontSize * 0.6 offset = max(offset,bulletEnd - style.leftIndent) return offset def _handleBulletWidth(bulletText,style,maxWidths): '''work out bullet width and adjust maxWidths[0] if neccessary ''' if bulletText <> None: if type(bulletText) is StringType: bulletWidth = stringWidth( bulletText, style.bulletFontName, style.bulletFontSize) else: #it's a list of fragments bulletWidth = 0 for f in bulletText: bulletWidth = bulletWidth + stringWidth(f.text, f.fontName, f.fontSize) bulletRight = style.bulletIndent + bulletWidth + 0.6 * style.bulletFontSize indent = style.leftIndent+style.firstLineIndent if bulletRight > indent: #..then it overruns, and we have less space available on line 1 maxWidths[0] = maxWidths[0] - (bulletRight - indent) def splitLines0(frags,widths): ''' given a list of ParaFrags we return a list of ParaLines each ParaLine has 1) ExtraSpace 2) blankCount 3) [textDefns....] each text definition is a (ParaFrag, start, limit) triplet ''' #initialise the algorithm lines = [] lineNum = 0 maxW = widths[lineNum] i = -1 l = len(frags) lim = start = 0 while 1: #find a non whitespace character while imaxW and line!=[]: cLen = cLen-w #this is the end of the line while g.text[lim]==' ': lim = lim - 1 nSpaces = nSpaces-1 break if j<0: j = lim if g[0] is f: g[2] = j #extend else: g = (f,start,j) line.append(g) if j==lim: i=i+1 def _do_under_lines(i, t_off, tx): y = tx.XtraState.cur_y - i*tx.XtraState.style.leading - tx.XtraState.f.fontSize/8.0 # 8.0 factor copied from para.py text = join(tx.XtraState.lines[i][1]) textlen = tx._canvas.stringWidth(text, tx._fontname, tx._fontsize) tx._canvas.line(t_off, y, t_off+textlen, y) def _do_under(i, t_off, tx): y = tx.XtraState.cur_y - i*tx.XtraState.style.leading - tx.XtraState.f.fontSize/8.0 # 8.0 factor copied from para.py for x1,x2 in tx.XtraState.underlines: tx._canvas.line(t_off+x1, y, t_off+x2, y) tx.XtraState.underlines = [] tx.XtraState.underline=0 class Paragraph(Flowable): """ Paragraph(text, style, bulletText=None, caseSensitive=1) text a string of stuff to go into the paragraph. style is a style definition as in reportlab.lib.styles. bulletText is an optional bullet defintion. caseSensitive set this to 0 if you want the markup tags and their attributes to be case-insensitive. This class is a flowable that can format a block of text into a paragraph with a given style. The paragraph Text can contain XML-like markup including the tags: ... - bold ... - italics ... - underline ... - superscript ... - subscript The whole may be surrounded by tags It will also be able to handle any MathML specified Greek characters. """ def __init__(self, text, style, bulletText = None, frags=None, caseSensitive=1): self.caseSensitive = caseSensitive self._setup(text, style, bulletText, frags, cleanBlockQuotedText) def __repr__(self): import string n = self.__class__.__name__ L = [n+"("] keys = self.__dict__.keys() for k in keys: v = getattr(self, k) rk = repr(k) rv = repr(v) rk = " "+string.replace(rk, "\n", "\n ") rv = " "+string.replace(rv, "\n", "\n ") L.append(rk) L.append(rv) L.append(") #"+n) return string.join(L, "\n") def _setup(self, text, style, bulletText, frags, cleaner): if frags is None: text = cleaner(text) _parser.caseSensitive = self.caseSensitive style, frags, bulletTextFrags = _parser.parse(text,style) if frags is None: raise "xml parser error (%s) in paragraph beginning\n'%s'"\ % (_parser.errors[0],text[:min(30,len(text))]) if bulletTextFrags: bulletText = bulletTextFrags #AR hack self.text = text self.frags = frags self.style = style self.bulletText = bulletText self.debug = 0 #turn this on to see a pretty one with all the margins etc. 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 self.blPara = self.breakLines([first_line_width, later_widths]) self.height = len(self.blPara.lines) * self.style.leading return (self.width, self.height) def minWidth(self): 'Attempt to determine a minimum sensible width' frags = self.frags nFrags= len(frags) if nFrags==1: f = frags[0] fS = f.fontSize fN = f.fontName words = hasattr(f,'text') and split(f.text, ' ') or f.words func = lambda w, fS=fS, fN=fN: stringWidth(w,fN,fS) else: words = _getFragWords(frags) func = lambda x: x[0] return max(map(func,words)) def _get_split_blParaFunc(self): return self.blPara.kind==0 and _split_blParaSimple or _split_blParaHard def split(self,availWidth, availHeight): if len(self.frags)<=0: return [] #the split information is all inside self.blPara if not hasattr(self,'blPara'): self.wrap(availWidth,availHeight) blPara = self.blPara style = self.style leading = style.leading lines = blPara.lines n = len(lines) s = int(availHeight/leading) if s<=1: del self.blPara return [] if n<=s: return [self] func = self._get_split_blParaFunc() P1=self.__class__(None,style,bulletText=self.bulletText,frags=func(blPara,0,s)) #this is a major hack P1.blPara = ParaLines(kind=1,lines=blPara.lines[0:s],aH=availHeight,aW=availWidth) P1._JustifyLast = 1 if style.firstLineIndent != 0: style = deepcopy(style) style.firstLineIndent = 0 P2=self.__class__(None,style,bulletText=None,frags=func(blPara,s,n)) return [P1,P2] def draw(self): #call another method for historical reasons. Besides, I #suspect I will be playing with alternate drawing routines #so not doing it here makes it easier to switch. self.drawPara(self.debug) def breakLines(self, width): """ Returns a broken line structure. There are two cases A) For the simple case of a single formatting input fragment the output is A fragment specifier with kind = 0 fontName, fontSize, leading, textColor lines= A list of lines Each line has two items. 1) unused width in points 2) word list B) When there is more than one input formatting fragment the out put is A fragment specifier with kind = 1 lines= A list of fragments each having fields extraspace (needed for justified) fontSize words=word list each word is itself a fragment with various settings This structure can be used to easily draw paragraphs with the various alignments. You can supply either a single width or a list of widths; the latter will have its last item repeated until necessary. A 2-element list is useful when there is a different first line indent; a longer list could be created to facilitate custom wraps around irregular objects.""" if type(width) <> ListType: maxWidths = [width] else: maxWidths = width lines = [] lineno = 0 style = self.style fFontSize = float(style.fontSize) #for bullets, work out width and ensure we wrap the right amount onto line one _handleBulletWidth(self.bulletText,style,maxWidths) maxWidth = maxWidths[0] self.height = 0 frags = self.frags nFrags= len(frags) if nFrags==1: f = frags[0] fontSize = f.fontSize fontName = f.fontName words = hasattr(f,'text') and split(f.text, ' ') or f.words spaceWidth = stringWidth(' ', fontName, fontSize) cLine = [] currentWidth = - spaceWidth # hack to get around extra space for word 1 for word in words: wordWidth = stringWidth(word, fontName, fontSize) newWidth = currentWidth + spaceWidth + wordWidth if newWidth<=maxWidth or len(cLine)==0: # fit one more on this line cLine.append(word) currentWidth = newWidth else: if currentWidth>self.width: self.width = currentWidth #end of line lines.append((maxWidth - currentWidth, cLine)) cLine = [word] currentWidth = wordWidth lineno = lineno + 1 try: maxWidth = maxWidths[lineno] except IndexError: maxWidth = maxWidths[-1] # use the last one #deal with any leftovers on the final line if cLine!=[]: if currentWidth>self.width: self.width = currentWidth lines.append((maxWidth - currentWidth, cLine)) return f.clone(kind=0, lines=lines) elif nFrags<=0: return ParaLines(kind=0, fontSize=style.fontSize, fontName=style.fontName, textColor=style.textColor, lines=[]) else: if hasattr(self,'blPara'): #NB this is an utter hack that awaits the proper information #preserving splitting algorithm return self.blPara n = 0 nSp = 0 for w in _getFragWords(frags): spaceWidth = stringWidth(' ',w[-1][0].fontName, w[-1][0].fontSize) if n==0: currentWidth = -spaceWidth # hack to get around extra space for word 1 words = [] maxSize = 0 wordWidth = w[0] f = w[1][0] if wordWidth>0: newWidth = currentWidth + spaceWidth + wordWidth else: newWidth = currentWidth if newWidth<=maxWidth or n==0: # fit one more on this line n = n + 1 maxSize = max(maxSize,f.fontSize) nText = w[1][1] if words==[]: g = f.clone() words = [g] g.text = nText elif not _sameFrag(g,f): if currentWidth>0 and ((nText!='' and nText[0]!=' ') or hasattr(f,'cbDefn')): if hasattr(g,'cbDefn'): i = len(words)-1 while hasattr(words[i],'cbDefn'): i = i-1 words[i].text = words[i].text + ' ' else: g.text = g.text + ' ' nSp = nSp + 1 g = f.clone() words.append(g) g.text = nText else: if nText!='' and nText[0]!=' ': g.text = g.text + ' ' + nText for i in w[2:]: g = i[0].clone() g.text=i[1] words.append(g) maxSize = max(maxSize,g.fontSize) currentWidth = newWidth else: if currentWidth>self.width: self.width = currentWidth #end of line lines.append(FragLine(extraSpace=(maxWidth - currentWidth),wordCount=n, words=words, fontSize=maxSize)) #start new line lineno = lineno + 1 try: maxWidth = maxWidths[lineno] except IndexError: maxWidth = maxWidths[-1] # use the last one currentWidth = wordWidth n = 1 maxSize = f.fontSize g = f.clone() words = [g] g.text = w[1][1] for i in w[2:]: g = i[0].clone() g.text=i[1] words.append(g) maxSize = max(maxSize,g.fontSize) #deal with any leftovers on the final line if words<>[]: if currentWidth>self.width: self.width = currentWidth lines.append(ParaLines(extraSpace=(maxWidth - currentWidth),wordCount=n, words=words, fontSize=maxSize)) return ParaLines(kind=1, lines=lines) return lines def beginText(self, x, y): return self.canv.beginText(x, y) def drawPara(self,debug=0): """Draws a paragraph according to the given style. Returns the final y position at the bottom. Not safe for paragraphs without spaces e.g. Japanese; wrapping algorithm will go infinite.""" #stash the key facts locally for speed canvas = self.canv style = self.style blPara = self.blPara lines = blPara.lines #work out the origin for line 1 leftIndent = style.leftIndent cur_x = leftIndent #if has a background, draw it if style.backColor: canvas.saveState() canvas.setFillColor(style.backColor) canvas.rect(leftIndent, 0, self.width - (leftIndent+style.rightIndent), self.height, fill=1, stroke=0) canvas.restoreState() if debug: # This boxes and shades stuff to show how the paragraph # uses its space. Useful for self-documentation so # the debug code stays! # box the lot canvas.rect(0, 0, self.width, self.height) #left and right margins canvas.saveState() canvas.setFillColor(Color(0.9,0.9,0.9)) canvas.rect(0, 0, leftIndent, self.height) canvas.rect(self.width - style.rightIndent, 0, style.rightIndent, self.height) # shade above and below canvas.setFillColor(Color(1.0,1.0,0.0)) canvas.restoreState() #self.drawLine(x + leftIndent, y, x + leftIndent, cur_y) nLines = len(lines) bulletText = self.bulletText if nLines > 0: canvas.saveState() #canvas.addLiteral('%% %s.drawPara' % _className(self)) alignment = style.alignment offset = style.firstLineIndent lim = nLines-1 noJustifyLast = not (hasattr(self,'_JustifyLast') and self._JustifyLast) if blPara.kind==0: if alignment == TA_LEFT: dpl = _leftDrawParaLine elif alignment == TA_CENTER: dpl = _centerDrawParaLine elif self.style.alignment == TA_RIGHT: dpl = _rightDrawParaLine elif self.style.alignment == TA_JUSTIFY: dpl = _justifyDrawParaLine f = blPara cur_y = self.height - f.fontSize if bulletText <> None: offset = _drawBullet(canvas,offset,cur_y,bulletText,style) #set up the font etc. canvas.setFillColor(f.textColor) tx = self.beginText(cur_x, cur_y) #now the font for the rest of the paragraph tx.setFont(f.fontName, f.fontSize, style.leading) t_off = dpl( tx, offset, lines[0][0], lines[0][1], noJustifyLast and nLines==1) if f.underline: tx.XtraState=ABag() tx.XtraState.cur_y = cur_y tx.XtraState.f = f tx.XtraState.style = style tx.XtraState.lines = lines _do_under_lines(0, t_off+leftIndent, tx) #now the middle of the paragraph, aligned with the left margin which is our origin. for i in range(1, nLines): t_off = dpl( tx, 0, lines[i][0], lines[i][1], noJustifyLast and i==lim) if f.underline: _do_under_lines(i, t_off+leftIndent, tx) else: for i in range(1, nLines): dpl( tx, 0, lines[i][0], lines[i][1], noJustifyLast and i==lim) else: f = lines[0] cur_y = self.height - f.fontSize # default? dpl = _leftDrawParaLineX if bulletText <> None: offset = _drawBullet(canvas,offset,cur_y,bulletText,style) if alignment == TA_LEFT: dpl = _leftDrawParaLineX elif alignment == TA_CENTER: dpl = _centerDrawParaLineX elif self.style.alignment == TA_RIGHT: dpl = _rightDrawParaLineX elif self.style.alignment == TA_JUSTIFY: dpl = _justifyDrawParaLineX else: raise ValueError, "bad align %s" % repr(alignment) #set up the font etc. tx = self.beginText(cur_x, cur_y) tx.XtraState=ABag() tx.XtraState.textColor=None tx.XtraState.rise=0 tx.XtraState.underline=0 tx.XtraState.underlines=[] tx.setLeading(style.leading) tx.XtraState.cur_y = cur_y tx.XtraState.f = f tx.XtraState.style = style #f = lines[0].words[0] #tx._setFont(f.fontName, f.fontSize) tx._fontname,tx._fontsize = None, None t_off = dpl( tx, offset, lines[0], noJustifyLast and nLines==1) _do_under(0, t_off+leftIndent, tx) #now the middle of the paragraph, aligned with the left margin which is our origin. for i in range(1, nLines): f = lines[i] t_off = dpl( tx, 0, f, noJustifyLast and i==lim) _do_under(i, t_off+leftIndent, tx) canvas.drawText(tx) canvas.restoreState() def getPlainText(self,identify=None): """Convenience function for templates which want access to the raw text, without XML tags. """ frags = getattr(self,'frags',None) if frags: plains = [] for frag in frags: plains.append(frag.text) return join(plains, '') elif identify: text = getattr(self,'text',None) if text is None: text = repr(self) return text else: return '' def getActualLineWidths0(self): """Convenience function; tells you how wide each line actually is. For justified styles, this will be the same as the wrap width; for others it might be useful for seeing if paragraphs will fit in spaces.""" assert hasattr(self, 'width'), "Cannot call this method before wrap()" if self.blPara.kind: func = lambda frag, w=self.width: w - frag.extraSpace else: func = lambda frag, w=self.width: w - frag[0] return map(func,self.blPara.lines) if __name__=='__main__': #NORUNTESTS def dumpParagraphLines(P): print 'dumpParagraphLines()' % id(P) lines = P.blPara.lines n =len(lines) for l in range(n): line = lines[l] if hasattr(line,'words'): words = line.words else: words = line[1] nwords = len(words) print 'line%d: %d(%s)\n ' % (l,nwords,str(getattr(line,'wordCount','Unknown'))), for w in range(nwords): print "%d:'%s'"%(w,getattr(words[w],'text',words[w])), print def dumpParagraphFrags(P): print 'dumpParagraphFrags() minWidth() = %.2f' % (id(P), P.minWidth()) frags = P.frags n =len(frags) for l in range(n): print "frag%d: '%s'" % (l, frags[l].text) l = 0 cum = 0 for W in _getFragWords(frags): cum = cum + W[0] print "fragword%d: cum=%3d size=%d" % (l, cum, W[0]), for w in W[1:]: print "'%s'" % w[1], print l = l + 1 from reportlab.lib.styles import getSampleStyleSheet, ParagraphStyle import sys TESTS = sys.argv[1:] if TESTS==[]: TESTS=['4'] def flagged(i,TESTS=TESTS): return 'all' in TESTS or '*' in TESTS or str(i) in TESTS styleSheet = getSampleStyleSheet() B = styleSheet['BodyText'] style = ParagraphStyle("discussiontext", parent=B) style.fontName= 'Helvetica' if flagged(1): text='''The CMYK or subtractive method follows the way a printer mixes three pigments (cyan, magenta, and yellow) to form colors. Because mixing chemicals is more difficult than combining light there is a fourth parameter for darkness. For example a chemical combination of the CMY pigments generally never makes a perfect black -- instead producing a muddy color -- so, to get black printers don't use the CMY pigments but use a direct black ink. Because CMYK maps more directly to the way printer hardware works it may be the case that &| & | colors specified in CMYK will provide better fidelity and better control when printed. ''' P=Paragraph(text,style) dumpParagraphFrags(P) aW, aH = 456.0, 42.8 w,h = P.wrap(aW, aH) dumpParagraphLines(P) S = P.split(aW,aH) for s in S: s.wrap(aW,aH) dumpParagraphLines(s) aH = 500 if flagged(2): P=Paragraph("""Price*""", styleSheet['Normal']) dumpParagraphFrags(P) w,h = P.wrap(24, 200) dumpParagraphLines(P) if flagged(3): text = """Dieses Kapitel bietet eine schnelle Programme :: starten Eingabeaufforderung :: (>>>) >>> (Eingabeaufforderung) Einf\374hrung in Python Python :: Einf\374hrung . Das Ziel ist, die grundlegenden Eigenschaften von Python darzustellen, ohne sich zu sehr in speziellen Regeln oder Details zu verstricken. Dazu behandelt dieses Kapitel kurz die wesentlichen Konzepte wie Variablen, Ausdr\374cke, Kontrollfluss, Funktionen sowie Ein- und Ausgabe. Es erhebt nicht den Anspruch, umfassend zu sein.""" P=Paragraph(text, styleSheet['Code']) dumpParagraphFrags(P) w,h = P.wrap(6*72, 9.7*72) dumpParagraphLines(P) if flagged(4): text='''Die eingebaute Funktion range(i, j [, stride]) erzeugt eine Liste von Ganzzahlen und f\374llt sie mit Werten k, f\374r die gilt: i <= k < j. Man kann auch eine optionale Schrittweite angeben. Die eingebaute Funktion xrange() erf\374llt einen \344hnlichen Zweck, gibt aber eine unver\344nderliche Sequenz vom Typ XRangeType zur\374ck. Anstatt alle Werte in der Liste abzuspeichern, berechnet diese Liste ihre Werte, wann immer sie angefordert werden. Das ist sehr viel speicherschonender, wenn mit sehr langen Listen von Ganzzahlen gearbeitet wird. XRangeType kennt eine einzige Methode, s.tolist(), die seine Werte in eine Liste umwandelt.''' aW = 420 aH = 64.4 P=Paragraph(text, B) dumpParagraphFrags(P) w,h = P.wrap(aW,aH) print 'After initial wrap',w,h dumpParagraphLines(P) S = P.split(aW,aH) dumpParagraphFrags(S[0]) w0,h0 = S[0].wrap(aW,aH) print 'After split wrap',w0,h0 dumpParagraphLines(S[0]) if flagged(5): text = ' %s & %s < >]]>' % (chr(163),chr(163)) P=Paragraph(text, styleSheet['Code']) dumpParagraphFrags(P) w,h = P.wrap(6*72, 9.7*72) dumpParagraphLines(P) if flagged(6): for text in ['''Here comes Helvetica 14 with strong emphasis.''', '''Here comes Helvetica 14 with strong emphasis.''', '''Here comes Courier 3cm and normal again.''', ]: P=Paragraph(text, styleSheet['Normal'], caseSensitive=0) dumpParagraphFrags(P) w,h = P.wrap(6*72, 9.7*72) dumpParagraphLines(P) if flagged(7): text = """Generated by:\tDilbert""" P=Paragraph(text, styleSheet['Code']) dumpParagraphFrags(P) w,h = P.wrap(6*72, 9.7*72) dumpParagraphLines(P)