reportlab/platypus/doctemplate.py
author andy_robinson
Mon, 26 Nov 2001 21:49:01 +0000
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parent 1428 13a13044e9a8
child 1502 125b52eb0a8e
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#copyright ReportLab Inc. 2000
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#see license.txt for license details
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#history http://cvs.sourceforge.net/cgi-bin/cvsweb.cgi/reportlab/platypus/doctemplate.py?cvsroot=reportlab
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#$Header: /tmp/reportlab/reportlab/platypus/doctemplate.py,v 1.49 2001/11/26 21:49:01 andy_robinson Exp $
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__version__=''' $Id: doctemplate.py,v 1.49 2001/11/26 21:49:01 andy_robinson Exp $ '''
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__doc__="""
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This module contains the core structure of platypus.
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Platypus constructs documents.	Document styles are determined by DocumentTemplates.
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Each DocumentTemplate contains one or more PageTemplates which defines the look of the
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pages of the document.
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Each PageTemplate has a procedure for drawing the "non-flowing" part of the page
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(for example the header, footer, page number, fixed logo graphic, watermark, etcetera) and
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a set of Frames which enclose the flowing part of the page (for example the paragraphs,
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tables, or non-fixed diagrams of the text).
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A document is built when a DocumentTemplate is fed a sequence of Flowables.
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The action of the build consumes the flowables in order and places them onto
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frames on pages as space allows.  When a frame runs out of space the next frame
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of the page is used.  If no frame remains a new page is created.  A new page
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can also be created if a page break is forced.
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The special invisible flowable NextPageTemplate can be used to specify
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the page template for the next page (which by default is the one being used
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for the current frame).
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"""
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from reportlab.platypus.flowables import *
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from reportlab.platypus.paragraph import Paragraph
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from reportlab.platypus.frames import Frame
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from reportlab.rl_config import defaultPageSize, _verbose
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import reportlab.lib.sequencer
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from types import *
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import sys
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def _doNothing(canvas, doc):
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	"Dummy callback for onPage"
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	pass
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class IndexingFlowable(Flowable):
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	"""Abstract interface definition for flowables which might
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	hold references to other pages or themselves be targets
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	of cross-references.  XRefStart, XRefDest, Table of Contents,
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	Indexes etc."""
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	def isIndexing(self):
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		return 1
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	def isSatisfied(self):
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		return 1
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	def notify(self, kind, stuff):
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		"""This will be called by the framework wherever 'stuff' happens.
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		'kind' will be a value that can be used to decide whether to
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		pay attention or not."""
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		pass
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	def beforeBuild(self):
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		"""Called by multiBuild before it starts; use this to clear
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		old contents"""
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		pass
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	def afterBuild(self):
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		"""Called after build ends but before isSatisfied"""
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		pass
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class ActionFlowable(Flowable):
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	'''This Flowable is never drawn, it can be used for data driven controls
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	   For example to change a page template (from one column to two, for example)
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	   use NextPageTemplate which creates an ActionFlowable.
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	'''
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	def __init__(self,action=()):
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		if type(action) not in (ListType, TupleType):
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			action = (action,)
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		self.action = tuple(action)
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	def wrap(self, availWidth, availHeight):
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		'''Should never be called.'''
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		raise NotImplementedError
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	def draw(self):
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		'''Should never be called.'''
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		raise NotImplementedError
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	def apply(self,doc):
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		'''
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		This is called by the doc.build processing to allow the instance to
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		implement its behaviour
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		'''
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		action = self.action[0]
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		args = tuple(self.action[1:])
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		arn = 'handle_'+action
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		try:
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			apply(getattr(doc,arn), args)
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		except AttributeError, aerr:
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			if aerr.args[0]==arn:
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				raise NotImplementedError, "Can't handle ActionFlowable(%s)" % action
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			else:
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				raise
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		except "bogus":
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			t, v, None = sys.exc_info()
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			raise t, "%s\n	 handle_%s args=%s"%(v,action,args)
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	def __call__(self):
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		return self
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class NextFrameFlowable(ActionFlowable):
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	def __init__(self,ix,resume=0):
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		ActionFlowable.__init__(self,('nextFrame',ix,resume))
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class CurrentFrameFlowable(ActionFlowable):
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	def __init__(self,ix,resume=0):
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		ActionFlowable.__init__(self,('currentFrame',ix,resume))
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class _FrameBreak(ActionFlowable):
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	'''
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	A special ActionFlowable that allows setting doc._nextFrameIndex
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	eg story.append(FrameBreak('mySpecialFrame'))
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	'''
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	def __call__(self,ix=None,resume=0):
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		r = self.__class__(self.action+(resume,))
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		r._ix = ix
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		return r
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	def apply(self,doc):
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		if getattr(self,'_ix',None): doc._nextFrameIndex = self._ix
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		ActionFlowable.apply(self,doc)
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FrameBreak = _FrameBreak('frameEnd')
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PageBegin = ActionFlowable('pageBegin')
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class NextPageTemplate(ActionFlowable):
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	"""When you get to the next page, use the template specified (change to two column, for example)  """
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	def __init__(self,pt):
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		ActionFlowable.__init__(self,('nextPageTemplate',pt))
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class PageTemplate:
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	"""
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	essentially a list of Frames and an onPage routine to call at the start
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	of a page when this is selected. onPageEnd gets called at the end.
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	derived classes can also implement beforeDrawPage and afterDrawPage if they want
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	"""
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	def __init__(self,id=None,frames=[],onPage=_doNothing, onPageEnd=_doNothing,
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				 pagesize=defaultPageSize):
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		if type(frames) not in (ListType,TupleType): frames = [frames]
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		assert filter(lambda x: not isinstance(x,Frame), frames)==[], "frames argument error"
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		self.id = id
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		self.frames = frames
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		self.onPage = onPage
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		self.onPageEnd = onPageEnd
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		self.pagesize = pagesize
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	def beforeDrawPage(self,canv,doc):
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		"""Override this if you want additional functionality or prefer
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		a class based page routine.  Called before any flowables for
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		this page are processed."""
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		pass
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	def checkPageSize(self,canv,doc):
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		'''This gets called by the template framework
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		If canv size != doc size then the canv size is set to
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		the template size or if that's not available to the
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		doc size.
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		'''
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		#### NEVER EVER EVER COMPARE FLOATS FOR EQUALITY
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		#RGB converting pagesizes to ints means we are accurate to one point
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		#RGB I suggest we should be aiming a little better
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		cp = None
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		dp = None
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		sp = None
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		if canv._pagesize: cp = map(int, canv._pagesize)
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		if self.pagesize: sp = map(int, self.pagesize)
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		if doc.pagesize: dp = map(int, doc.pagesize)
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		if cp!=sp:
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			if sp:
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				canv.setPageSize(self.pagesize)
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			elif cp!=dp:
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				canv.setPageSize(doc.pagesize)
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	def afterDrawPage(self, canv, doc):
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		"""This is called after the last flowable for the page has
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		been processed.  You might use this if the page header or
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		footer needed knowledge of what flowables were drawn on
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		this page."""
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		pass
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class BaseDocTemplate:
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	"""
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	First attempt at defining a document template class.
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	The basic idea is simple.
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	0)	The document has a list of data associated with it
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		this data should derive from flowables. We'll have
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		special classes like PageBreak, FrameBreak to do things
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		like forcing a page end etc.
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	1)	The document has one or more page templates.
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	2)	Each page template has one or more frames.
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	3)	The document class provides base methods for handling the
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		story events and some reasonable methods for getting the
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		story flowables into the frames.
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	4)	The document instances can override the base handler routines.
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	Most of the methods for this class are not called directly by the user,
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	but in some advanced usages they may need to be overridden via subclassing.
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	EXCEPTION: doctemplate.build(...) must be called for most reasonable uses
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	since it builds a document using the page template.
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	Each document template builds exactly one document into a file specified
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	by the filename argument on initialization.
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	Possible keyword arguments for the initialization:
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	pageTemplates: A list of templates.  Must be nonempty.	Names
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	  assigned to the templates are used for referring to them so no two used
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	  templates should have the same name.	For example you might want one template
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	  for a title page, one for a section first page, one for a first page of
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	  a chapter and two more for the interior of a chapter on odd and even pages.
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	  If this argument is omitted then at least one pageTemplate should be provided
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	  using the addPageTemplates method before the document is built.
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	showBoundary: if set draw a box around the frame boundaries.
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	leftMargin:
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	rightMargin:
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	topMargin:
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	bottomMargin:  Margin sizes in points (default 1 inch)
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	  These margins may be overridden by the pageTemplates.  They are primarily of interest
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	  for the SimpleDocumentTemplate subclass.
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	allowSplitting:  If set flowables (eg, paragraphs) may be split across frames or pages
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	  (default: 1)
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	title: Internal title for document (does not automatically display on any page)
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	author: Internal author for document (does not automatically display on any page)
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	"""
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	_initArgs = {	'pagesize':defaultPageSize,
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					'pageTemplates':[],
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					'showBoundary':0,
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					'leftMargin':inch,
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					'rightMargin':inch,
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					'topMargin':inch,
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					'bottomMargin':inch,
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					'allowSplitting':1,
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					'title':None,
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					'author':None,
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					'_pageBreakQuick':1}
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	_invalidInitArgs = ()
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	def __init__(self, filename, **kw):
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		"""create a document template bound to a filename (see class documentation for keyword arguments)"""
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		self.filename = filename
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		for k in self._initArgs.keys():
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			if not kw.has_key(k):
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				v = self._initArgs[k]
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			else:
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				if k in self._invalidInitArgs:
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					raise ValueError, "Invalid argument %s" % k
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				v = kw[k]
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			setattr(self,k,v)
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		#print "pagesize is", self.pagesize
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		p = self.pageTemplates
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		self.pageTemplates = []
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		self.addPageTemplates(p)
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		# facility to assist multi-build and cross-referencing.
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		# various hooks can put things into here - key is what
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		# you want, value is a page number.  This can then be
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		# passed to indexing flowables.
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		self._pageRefs = {}
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		self._indexingFlowables = []
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		self._calc()
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		self.afterInit()
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	def _calc(self):
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		self._rightMargin = self.pagesize[0] - self.rightMargin
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		self._topMargin = self.pagesize[1] - self.topMargin
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		self.width = self._rightMargin - self.leftMargin
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		self.height = self._topMargin - self.bottomMargin
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	def clean_hanging(self):
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		'handle internal postponed actions'
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		while len(self._hanging):
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			self.handle_flowable(self._hanging)
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	def addPageTemplates(self,pageTemplates):
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		'add one or a sequence of pageTemplates'
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		if type(pageTemplates) not in (ListType,TupleType):
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			pageTemplates = [pageTemplates]
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		#this test below fails due to inconsistent imports!
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		#assert filter(lambda x: not isinstance(x,PageTemplate), pageTemplates)==[], "pageTemplates argument error"
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		for t in pageTemplates:
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			self.pageTemplates.append(t)
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	def handle_documentBegin(self):
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		'''implement actions at beginning of document'''
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		self._hanging = [PageBegin]
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		self.pageTemplate = self.pageTemplates[0]
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		self.page = 0
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		self.beforeDocument()
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	def handle_pageBegin(self):
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		'''Perform actions required at beginning of page.
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		shouldn't normally be called directly'''
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		self.page = self.page + 1
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		self.pageTemplate.beforeDrawPage(self.canv,self)
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		self.pageTemplate.checkPageSize(self.canv,self)
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		self.pageTemplate.onPage(self.canv,self)
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		for f in self.pageTemplate.frames: f._reset()
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		self.beforePage()
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		if hasattr(self,'_nextFrameIndex'):
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			del self._nextFrameIndex
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		self.frame = self.pageTemplate.frames[0]
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		self.handle_frameBegin()
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	def handle_pageEnd(self):
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		''' show the current page
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			check the next page template
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			hang a page begin
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		'''
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		self.pageTemplate.afterDrawPage(self.canv, self)
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		self.pageTemplate.onPageEnd(self.canv, self)
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		self.afterPage()
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		self.canv.showPage()
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		if hasattr(self,'_nextPageTemplateIndex'):
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			self.pageTemplate = self.pageTemplates[self._nextPageTemplateIndex]
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			del self._nextPageTemplateIndex
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		self._hanging.append(PageBegin)
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	def handle_pageBreak(self):
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		'''some might choose not to end all the frames'''
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		if self._pageBreakQuick:
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			self.handle_pageEnd()
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		else:
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			n = len(self._hanging)
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			while len(self._hanging)==n:
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				self.handle_frameEnd()
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	def handle_frameBegin(self,resume=0):
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   355
		'''What to do at the beginning of a frame'''
3335a8e81e7b Possible improvements to FrameBreak et al
rgbecker
parents: 1268
diff changeset
   356
		f = self.frame
3335a8e81e7b Possible improvements to FrameBreak et al
rgbecker
parents: 1268
diff changeset
   357
		if f._atTop:
3335a8e81e7b Possible improvements to FrameBreak et al
rgbecker
parents: 1268
diff changeset
   358
			if self.showBoundary or self.frame.showBoundary:
3335a8e81e7b Possible improvements to FrameBreak et al
rgbecker
parents: 1268
diff changeset
   359
				self.frame.drawBoundary(self.canv)
197
b8ca098f5ec7 Initial try at a document template class
rgbecker
parents:
diff changeset
   360
1324
3335a8e81e7b Possible improvements to FrameBreak et al
rgbecker
parents: 1268
diff changeset
   361
	def handle_frameEnd(self,resume=0):
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   362
		''' Handles the semantics of the end of a frame. This includes the selection of
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   363
			the next frame or if this is the last frame then invoke pageEnd.
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   364
		'''
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   365
		if hasattr(self,'_nextFrameIndex'):
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   366
			frame = self.pageTemplate.frames[self._nextFrameIndex]
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   367
			del self._nextFrameIndex
1324
3335a8e81e7b Possible improvements to FrameBreak et al
rgbecker
parents: 1268
diff changeset
   368
			self.handle_frameBegin(resume)
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   369
		elif hasattr(self.frame,'lastFrame') or self.frame is self.pageTemplate.frames[-1]:
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   370
			self.handle_pageEnd()
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   371
			self.frame = None
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   372
		else:
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   373
			f = self.frame
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   374
			self.frame = self.pageTemplate.frames[self.pageTemplate.frames.index(f) + 1]
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   375
			self.handle_frameBegin()
197
b8ca098f5ec7 Initial try at a document template class
rgbecker
parents:
diff changeset
   376
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   377
	def handle_nextPageTemplate(self,pt):
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   378
		'''On endPage chenge to the page template with name or index pt'''
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   379
		if type(pt) is StringType:
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   380
			for t in self.pageTemplates:
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   381
				if t.id == pt:
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   382
					self._nextPageTemplateIndex = self.pageTemplates.index(t)
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   383
					return
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   384
			raise ValueError, "can't find template('%s')"%pt
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   385
		elif type(pt) is IntType:
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   386
			self._nextPageTemplateIndex = pt
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   387
		else:
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   388
			raise TypeError, "argument pt should be string or integer"
197
b8ca098f5ec7 Initial try at a document template class
rgbecker
parents:
diff changeset
   389
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   390
	def handle_nextFrame(self,fx):
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   391
		'''On endFrame chenge to the frame with name or index fx'''
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   392
		if type(fx) is StringType:
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   393
			for f in self.pageTemplate.frames:
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   394
				if f.id == fx:
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   395
					self._nextFrameIndex = self.pageTemplate.frames.index(f)
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   396
					return
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   397
			raise ValueError, "can't find frame('%s')"%fx
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   398
		elif type(fx) is IntType:
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   399
			self._nextFrameIndex = fx
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   400
		else:
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   401
			raise TypeError, "argument fx should be string or integer"
512
c12ae96634d5 Added working table of contents framework
andy_robinson
parents: 500
diff changeset
   402
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   403
	def handle_currentFrame(self,fx):
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   404
		'''chenge to the frame with name or index fx'''
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   405
		if type(fx) is StringType:
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   406
			for f in self.pageTemplate.frames:
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   407
				if f.id == fx:
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   408
					self._nextFrameIndex = self.pageTemplate.frames.index(f)
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   409
					return
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   410
			raise ValueError, "can't find frame('%s')"%fx
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   411
		elif type(fx) is IntType:
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   412
			self._nextFrameIndex = fx
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   413
		else:
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   414
			raise TypeError, "argument fx should be string or integer"
197
b8ca098f5ec7 Initial try at a document template class
rgbecker
parents:
diff changeset
   415
1425
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   416
	def handle_breakBefore(self, flowables):
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   417
		'''preprocessing step to allow pageBreakBefore and frameBreakBefore attributes'''
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   418
		first = flowables[0]
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   419
		# if we insert a page break before, we'll process that, see it again,
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   420
		# and go in an infinite loop.  So we need to set a flag on the object
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   421
		# saying 'skip me'.  This should be unset on the next pass
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   422
		if hasattr(first, '_skipMeNextTime'):
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   423
			delattr(first, '_skipMeNextTime')
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   424
			return
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   425
		# this could all be made much quicker by putting the attributes
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   426
		# in to the flowables with a defult value of 0
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   427
		if hasattr(first,'pageBreakBefore') and first.pageBreakBefore == 1:
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   428
			first._skipMeNextTime = 1
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   429
			first.insert(0, PageBreak())
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   430
			return
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   431
		if hasattr(first,'style') and hasattr(first.style, 'pageBreakBefore') and first.style.pageBreakBefore == 1:
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   432
			first._skipMeNextTime = 1
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   433
			flowables.insert(0, PageBreak())
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   434
			return
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   435
		if hasattr(first,'frameBreakBefore') and first.frameBreakBefore == 1:
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   436
			first._skipMeNextTime = 1
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   437
			flowables.insert(0, FrameBreak())
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   438
			return
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   439
		if hasattr(first,'style') and hasattr(first.style, 'frameBreakBefore') and first.style.frameBreakBefore == 1:
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   440
			first._skipMeNextTime = 1
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   441
			flowables.insert(0, FrameBreak())
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   442
			return
1428
13a13044e9a8 Fixed up keepWithNext so it works
rgbecker
parents: 1425
diff changeset
   443
13a13044e9a8 Fixed up keepWithNext so it works
rgbecker
parents: 1425
diff changeset
   444
1425
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   445
	def handle_keepWithNext(self, flowables):
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   446
		"implements keepWithNext"
1428
13a13044e9a8 Fixed up keepWithNext so it works
rgbecker
parents: 1425
diff changeset
   447
		i = 0
13a13044e9a8 Fixed up keepWithNext so it works
rgbecker
parents: 1425
diff changeset
   448
		n = len(flowables)
13a13044e9a8 Fixed up keepWithNext so it works
rgbecker
parents: 1425
diff changeset
   449
		while i<n and flowables[i].getKeepWithNext(): i = i + 1
13a13044e9a8 Fixed up keepWithNext so it works
rgbecker
parents: 1425
diff changeset
   450
		if i:
13a13044e9a8 Fixed up keepWithNext so it works
rgbecker
parents: 1425
diff changeset
   451
			i = i + 1
13a13044e9a8 Fixed up keepWithNext so it works
rgbecker
parents: 1425
diff changeset
   452
			K = KeepTogether(flowables[:i])
13a13044e9a8 Fixed up keepWithNext so it works
rgbecker
parents: 1425
diff changeset
   453
			for f in K._flowables:
13a13044e9a8 Fixed up keepWithNext so it works
rgbecker
parents: 1425
diff changeset
   454
				f.keepWithNext = 0
13a13044e9a8 Fixed up keepWithNext so it works
rgbecker
parents: 1425
diff changeset
   455
			del flowables[:i]
13a13044e9a8 Fixed up keepWithNext so it works
rgbecker
parents: 1425
diff changeset
   456
			flowables.insert(0,K)
1425
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   457
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   458
	def handle_flowable(self,flowables):
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   459
		'''try to handle one flowable from the front of list flowables.'''
1428
13a13044e9a8 Fixed up keepWithNext so it works
rgbecker
parents: 1425
diff changeset
   460
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   461
		#allow document a chance to look at, modify or ignore
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   462
		#the object(s) about to be processed
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   463
		self.filterFlowables(flowables)
1428
13a13044e9a8 Fixed up keepWithNext so it works
rgbecker
parents: 1425
diff changeset
   464
1425
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   465
		self.handle_breakBefore(flowables)
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   466
		self.handle_keepWithNext(flowables)
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   467
		f = flowables[0]
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   468
		del flowables[0]
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   469
		if f is None:
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   470
			return
197
b8ca098f5ec7 Initial try at a document template class
rgbecker
parents:
diff changeset
   471
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   472
		if isinstance(f,PageBreak):
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   473
			self.handle_pageBreak()
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   474
			self.afterFlowable(f)
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   475
		elif isinstance(f,ActionFlowable):
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   476
			f.apply(self)
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   477
			self.afterFlowable(f)
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   478
		else:
1425
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   479
			#try to fit it then draw it
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   480
			if self.frame.add(f, self.canv, trySplit=self.allowSplitting):
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   481
				self.afterFlowable(f)
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   482
			else:
1425
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   483
				#if isinstance(f, KeepTogether): print 'could not add it to frame'
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   484
				if self.allowSplitting:
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   485
					# see if this is a splittable thing
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   486
					S = self.frame.split(f,self.canv)
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   487
					n = len(S)
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   488
				else:
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   489
					n = 0
1425
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   490
				#if isinstance(f, KeepTogether): print 'n=%d' % n
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   491
				if n:
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   492
					if self.frame.add(S[0], self.canv, trySplit=0):
551
21b8a2cb8c8b Hack to fix Dinu's problem
rgbecker
parents: 550
diff changeset
   493
						self.afterFlowable(S[0])
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   494
					else:
1425
fa9f74f1a701 Experiments with platypus
andy_robinson
parents: 1324
diff changeset
   495
						print 'n = %d' % n
1103
857af510186d Added identity method to Flowables
rgbecker
parents: 936
diff changeset
   496
						raise "LayoutError", "splitting error on page %d in\n%s" % (self.page,f.identity(30))
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   497
					del S[0]
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   498
					for f in xrange(n-1):
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   499
						flowables.insert(f,S[f])	# put split flowables back on the list
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   500
				else:
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   501
					# this must be cleared when they are finally drawn!
698
864265047890 Changed attribute postponed to _postponed in doctemplate.py.
dinu_gherman
parents: 684
diff changeset
   502
##					if hasattr(f,'postponed'):
864265047890 Changed attribute postponed to _postponed in doctemplate.py.
dinu_gherman
parents: 684
diff changeset
   503
					if hasattr(f,'_postponed'):
1103
857af510186d Added identity method to Flowables
rgbecker
parents: 936
diff changeset
   504
						message = "Flowable %s too large on page %d" % (f.identity(30), self.page)
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   505
						#show us, it might be handy
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   506
						#HACK = it seems within tables we sometimes
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   507
						#get an empty paragraph that won't fit and this
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   508
						#causes it to fall over.  FIXME FIXME FIXME
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   509
						raise "LayoutError", message
698
864265047890 Changed attribute postponed to _postponed in doctemplate.py.
dinu_gherman
parents: 684
diff changeset
   510
##					f.postponed = 1
864265047890 Changed attribute postponed to _postponed in doctemplate.py.
dinu_gherman
parents: 684
diff changeset
   511
					f._postponed = 1
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   512
					flowables.insert(0,f)			# put the flowable back
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   513
					self.handle_frameEnd()
197
b8ca098f5ec7 Initial try at a document template class
rgbecker
parents:
diff changeset
   514
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   515
	#these are provided so that deriving classes can refer to them
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   516
	_handle_documentBegin = handle_documentBegin
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   517
	_handle_pageBegin = handle_pageBegin
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   518
	_handle_pageEnd = handle_pageEnd
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   519
	_handle_frameBegin = handle_frameBegin
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   520
	_handle_frameEnd = handle_frameEnd
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   521
	_handle_flowable = handle_flowable
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   522
	_handle_nextPageTemplate = handle_nextPageTemplate
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   523
	_handle_currentFrame = handle_currentFrame
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   524
	_handle_nextFrame = handle_nextFrame
197
b8ca098f5ec7 Initial try at a document template class
rgbecker
parents:
diff changeset
   525
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   526
	def _startBuild(self, filename=None, canvasmaker=canvas.Canvas):
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   527
		self._calc()
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   528
		self.canv = canvasmaker(filename or self.filename,pagesize=self.pagesize)
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   529
		self.handle_documentBegin()
512
c12ae96634d5 Added working table of contents framework
andy_robinson
parents: 500
diff changeset
   530
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   531
	def _endBuild(self):
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   532
		if self._hanging!=[] and self._hanging[-1] is PageBegin:
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   533
			del self._hanging[-1]
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   534
			self.clean_hanging()
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   535
		else:
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   536
			self.clean_hanging()
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   537
			self.handle_pageBreak()
512
c12ae96634d5 Added working table of contents framework
andy_robinson
parents: 500
diff changeset
   538
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   539
		self.canv.save()
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   540
		#AR - hack - for some reason a document did not
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   541
		#have these:
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   542
		#if hasattr(self, 'frame'): del self.frame
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   543
		#if hasattr(self, 'pageTemplate'): del self.pageTemplate
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   544
		#del self.frame, self.pageTemplate
218
274db2129c04 Fixes/Changes to get testplatypus to work with new framework
rgbecker
parents: 214
diff changeset
   545
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   546
	def build(self, flowables, filename=None, canvasmaker=canvas.Canvas):
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   547
		"""Build the document from a list of flowables.
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   548
		   If the filename argument is provided then that filename is used
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   549
		   rather than the one provided upon initialization.
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   550
		   If the canvasmaker argument is provided then it will be used
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   551
		   instead of the default.	For example a slideshow might use
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   552
		   an alternate canvas which places 6 slides on a page (by
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   553
		   doing translations, scalings and redefining the page break
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   554
		   operations).
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   555
		"""
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   556
		#assert filter(lambda x: not isinstance(x,Flowable), flowables)==[], "flowables argument error"
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   557
		self._startBuild(filename,canvasmaker)
512
c12ae96634d5 Added working table of contents framework
andy_robinson
parents: 500
diff changeset
   558
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   559
		while len(flowables):
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   560
			self.clean_hanging()
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   561
			self.handle_flowable(flowables)
512
c12ae96634d5 Added working table of contents framework
andy_robinson
parents: 500
diff changeset
   562
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   563
		self._endBuild()
512
c12ae96634d5 Added working table of contents framework
andy_robinson
parents: 500
diff changeset
   564
1440
243d35446390 Removed 0 from multiBuild stuff prior to further changes;
andy_robinson
parents: 1428
diff changeset
   565
	def _allSatisfied(self):
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   566
		"""Called by multi-build - are all cross-references resolved?"""
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   567
		allHappy = 1
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   568
		for f in self._indexingFlowables:
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   569
			if not f.isSatisfied():
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   570
				allHappy = 0
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   571
				break
1428
13a13044e9a8 Fixed up keepWithNext so it works
rgbecker
parents: 1425
diff changeset
   572
		return allHappy
197
b8ca098f5ec7 Initial try at a document template class
rgbecker
parents:
diff changeset
   573
1440
243d35446390 Removed 0 from multiBuild stuff prior to further changes;
andy_robinson
parents: 1428
diff changeset
   574
	def notify(self, kind, stuff):
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   575
		""""Forward to any listeners"""
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   576
		for l in self._indexingFlowables:
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   577
			l.notify(kind, stuff)
1428
13a13044e9a8 Fixed up keepWithNext so it works
rgbecker
parents: 1425
diff changeset
   578
1440
243d35446390 Removed 0 from multiBuild stuff prior to further changes;
andy_robinson
parents: 1428
diff changeset
   579
	def pageRef(self, label):
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   580
		"""hook to register a page number"""
1131
069fea8037dc Added _verbose control
rgbecker
parents: 1103
diff changeset
   581
		if _verbose: print "pageRef called with label '%s' on page %d" % (
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   582
			label, self.page)
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   583
		self._pageRefs[label] = self.page
1428
13a13044e9a8 Fixed up keepWithNext so it works
rgbecker
parents: 1425
diff changeset
   584
1440
243d35446390 Removed 0 from multiBuild stuff prior to further changes;
andy_robinson
parents: 1428
diff changeset
   585
	def multiBuild(self, story,
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   586
				   filename=None,
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   587
				   canvasmaker=canvas.Canvas,
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   588
				   maxPasses = 10):
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   589
		"""Makes multiple passes until all indexing flowables
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   590
		are happy."""
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   591
		self._indexingFlowables = []
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   592
		#scan the story and keep a copy
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   593
		for thing in story:
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   594
			if thing.isIndexing():
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   595
				self._indexingFlowables.append(thing)
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   596
		#print 'scanned story, found these indexing flowables:\n'
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   597
		#print self._indexingFlowables
1440
243d35446390 Removed 0 from multiBuild stuff prior to further changes;
andy_robinson
parents: 1428
diff changeset
   598
		
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   599
		passes = 0
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   600
		while 1:
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   601
			passes = passes + 1
1131
069fea8037dc Added _verbose control
rgbecker
parents: 1103
diff changeset
   602
			if _verbose: print 'building pass '+str(passes) + '...',
197
b8ca098f5ec7 Initial try at a document template class
rgbecker
parents:
diff changeset
   603
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   604
			for fl in self._indexingFlowables:
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   605
				fl.beforeBuild()
218
274db2129c04 Fixes/Changes to get testplatypus to work with new framework
rgbecker
parents: 214
diff changeset
   606
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   607
			# work with a copy of the story, since it is consumed
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   608
			tempStory = story[:]
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   609
			self.build(tempStory, filename, canvasmaker)
1440
243d35446390 Removed 0 from multiBuild stuff prior to further changes;
andy_robinson
parents: 1428
diff changeset
   610
			#self.notify('debug',None)
512
c12ae96634d5 Added working table of contents framework
andy_robinson
parents: 500
diff changeset
   611
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   612
			#clean up so multi-build does not go wrong - the frame
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   613
			#packer might have tacked an attribute onto some
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   614
			#paragraphs
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   615
			for elem in story:
698
864265047890 Changed attribute postponed to _postponed in doctemplate.py.
dinu_gherman
parents: 684
diff changeset
   616
##				if hasattr(elem, 'postponed'):
864265047890 Changed attribute postponed to _postponed in doctemplate.py.
dinu_gherman
parents: 684
diff changeset
   617
##					del elem.postponed
864265047890 Changed attribute postponed to _postponed in doctemplate.py.
dinu_gherman
parents: 684
diff changeset
   618
				if hasattr(elem, '_postponed'):
864265047890 Changed attribute postponed to _postponed in doctemplate.py.
dinu_gherman
parents: 684
diff changeset
   619
					del elem._postponed
218
274db2129c04 Fixes/Changes to get testplatypus to work with new framework
rgbecker
parents: 214
diff changeset
   620
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   621
			for fl in self._indexingFlowables:
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   622
				fl.afterBuild()
218
274db2129c04 Fixes/Changes to get testplatypus to work with new framework
rgbecker
parents: 214
diff changeset
   623
1440
243d35446390 Removed 0 from multiBuild stuff prior to further changes;
andy_robinson
parents: 1428
diff changeset
   624
			happy = self._allSatisfied()
221
3d71b66b14c6 Changes related to removal of SimpleFlowDocument
rgbecker
parents: 218
diff changeset
   625
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   626
			if happy:
618
d9159ec67dbd Commented some disturbing print statements.
dinu_gherman
parents: 565
diff changeset
   627
				## print 'OK'
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   628
				break
618
d9159ec67dbd Commented some disturbing print statements.
dinu_gherman
parents: 565
diff changeset
   629
			## else:
d9159ec67dbd Commented some disturbing print statements.
dinu_gherman
parents: 565
diff changeset
   630
				## print 'failed'
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   631
			if passes > maxPasses:
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   632
				raise IndexError, "Index entries not resolved after %d passes" % maxPasses
1428
13a13044e9a8 Fixed up keepWithNext so it works
rgbecker
parents: 1425
diff changeset
   633
1131
069fea8037dc Added _verbose control
rgbecker
parents: 1103
diff changeset
   634
		if _verbose: print 'saved'
284
eabeb5f4e851 Added UserDocTemplate class, and paragraph.getPlainText()
andy_robinson
parents: 279
diff changeset
   635
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   636
	#these are pure virtuals override in derived classes
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   637
	#NB these get called at suitable places by the base class
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   638
	#so if you derive and override the handle_xxx methods
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   639
	#it's up to you to ensure that they maintain the needed consistency
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   640
	def afterInit(self):
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   641
		"""This is called after initialisation of the base class."""
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   642
		pass
284
eabeb5f4e851 Added UserDocTemplate class, and paragraph.getPlainText()
andy_robinson
parents: 279
diff changeset
   643
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   644
	def beforeDocument(self):
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   645
		"""This is called before any processing is
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   646
		done on the document."""
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   647
		pass
284
eabeb5f4e851 Added UserDocTemplate class, and paragraph.getPlainText()
andy_robinson
parents: 279
diff changeset
   648
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   649
	def beforePage(self):
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   650
		"""This is called at the beginning of page
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   651
		processing, and immediately before the
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   652
		beforeDrawPage method of the current page
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   653
		template."""
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   654
		pass
284
eabeb5f4e851 Added UserDocTemplate class, and paragraph.getPlainText()
andy_robinson
parents: 279
diff changeset
   655
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   656
	def afterPage(self):
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   657
		"""This is called after page processing, and
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   658
		immediately after the afterDrawPage method
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   659
		of the current page template."""
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   660
		pass
284
eabeb5f4e851 Added UserDocTemplate class, and paragraph.getPlainText()
andy_robinson
parents: 279
diff changeset
   661
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   662
	def filterFlowables(self,flowables):
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   663
		'''called to filter flowables at the start of the main handle_flowable method.
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   664
		Upon return if flowables[0] has been set to None it is discarded and the main
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   665
		method returns.
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   666
		'''
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   667
		pass
1428
13a13044e9a8 Fixed up keepWithNext so it works
rgbecker
parents: 1425
diff changeset
   668
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   669
	def afterFlowable(self, flowable):
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   670
		'''called after a flowable has been rendered'''
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   671
		pass
284
eabeb5f4e851 Added UserDocTemplate class, and paragraph.getPlainText()
andy_robinson
parents: 279
diff changeset
   672
565
179927300074 Minor changes.
dinu_gherman
parents: 551
diff changeset
   673
221
3d71b66b14c6 Changes related to removal of SimpleFlowDocument
rgbecker
parents: 218
diff changeset
   674
class SimpleDocTemplate(BaseDocTemplate):
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   675
	"""A special case document template that will handle many simple documents.
1428
13a13044e9a8 Fixed up keepWithNext so it works
rgbecker
parents: 1425
diff changeset
   676
	   See documentation for BaseDocTemplate.  No pageTemplates are required
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   677
	   for this special case.	A page templates are inferred from the
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   678
	   margin information and the onFirstPage, onLaterPages arguments to the build method.
1428
13a13044e9a8 Fixed up keepWithNext so it works
rgbecker
parents: 1425
diff changeset
   679
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   680
	   A document which has all pages with the same look except for the first
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   681
	   page may can be built using this special approach.
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   682
	"""
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   683
	_invalidInitArgs = ('pageTemplates',)
565
179927300074 Minor changes.
dinu_gherman
parents: 551
diff changeset
   684
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   685
	def handle_pageBegin(self):
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   686
		'''override base method to add a change of page template after the firstpage.
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   687
		'''
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   688
		self._handle_pageBegin()
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   689
		self._handle_nextPageTemplate('Later')
221
3d71b66b14c6 Changes related to removal of SimpleFlowDocument
rgbecker
parents: 218
diff changeset
   690
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   691
	def build(self,flowables,onFirstPage=_doNothing, onLaterPages=_doNothing):
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   692
		"""build the document using the flowables.	Annotate the first page using the onFirstPage
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   693
			   function and later pages using the onLaterPages function.  The onXXX pages should follow
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   694
			   the signature
1428
13a13044e9a8 Fixed up keepWithNext so it works
rgbecker
parents: 1425
diff changeset
   695
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   696
				  def myOnFirstPage(canvas, document):
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   697
					  # do annotations and modify the document
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   698
					  ...
1428
13a13044e9a8 Fixed up keepWithNext so it works
rgbecker
parents: 1425
diff changeset
   699
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   700
			   The functions can do things like draw logos, page numbers,
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   701
			   footers, etcetera. They can use external variables to vary
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   702
			   the look (for example providing page numbering or section names).
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   703
		"""
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   704
		self._calc()	#in case we changed margins sizes etc
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   705
		frameT = Frame(self.leftMargin, self.bottomMargin, self.width, self.height, id='normal')
1267
118eabbf5ba4 Added template pagesize args in SimpleDoc.__init__ as suggested by D Horkoff
rgbecker
parents: 1222
diff changeset
   706
		self.addPageTemplates([PageTemplate(id='First',frames=frameT, onPage=onFirstPage,pagesize=self.pagesize),
118eabbf5ba4 Added template pagesize args in SimpleDoc.__init__ as suggested by D Horkoff
rgbecker
parents: 1222
diff changeset
   707
						PageTemplate(id='Later',frames=frameT, onPage=onLaterPages,pagesize=self.pagesize)])
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   708
		if onFirstPage is _doNothing and hasattr(self,'onFirstPage'):
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   709
			self.pageTemplates[0].beforeDrawPage = self.onFirstPage
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   710
		if onLaterPages is _doNothing and hasattr(self,'onLaterPages'):
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   711
			self.pageTemplates[1].beforeDrawPage = self.onLaterPages
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   712
		BaseDocTemplate.build(self,flowables)
512
c12ae96634d5 Added working table of contents framework
andy_robinson
parents: 500
diff changeset
   713
565
179927300074 Minor changes.
dinu_gherman
parents: 551
diff changeset
   714
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   715
	##########################################################
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   716
	##
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   717
	##	 testing
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   718
	##
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   719
	##########################################################
512
c12ae96634d5 Added working table of contents framework
andy_robinson
parents: 500
diff changeset
   720
c12ae96634d5 Added working table of contents framework
andy_robinson
parents: 500
diff changeset
   721
def randomText():
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   722
	#this may or may not be appropriate in your company
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   723
	from random import randint, choice
512
c12ae96634d5 Added working table of contents framework
andy_robinson
parents: 500
diff changeset
   724
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   725
	RANDOMWORDS = ['strategic','direction','proactive',
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   726
	'reengineering','forecast','resources',
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   727
	'forward-thinking','profit','growth','doubletalk',
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   728
	'venture capital','IPO']
512
c12ae96634d5 Added working table of contents framework
andy_robinson
parents: 500
diff changeset
   729
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   730
	sentences = 5
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   731
	output = ""
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   732
	for sentenceno in range(randint(1,5)):
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   733
		output = output + 'Blah'
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   734
		for wordno in range(randint(10,25)):
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   735
			if randint(0,4)==0:
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   736
				word = choice(RANDOMWORDS)
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   737
			else:
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   738
				word = 'blah'
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   739
			output = output + ' ' +word
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   740
		output = output+'.'
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   741
	return output
221
3d71b66b14c6 Changes related to removal of SimpleFlowDocument
rgbecker
parents: 218
diff changeset
   742
565
179927300074 Minor changes.
dinu_gherman
parents: 551
diff changeset
   743
221
3d71b66b14c6 Changes related to removal of SimpleFlowDocument
rgbecker
parents: 218
diff changeset
   744
if __name__ == '__main__':
3d71b66b14c6 Changes related to removal of SimpleFlowDocument
rgbecker
parents: 218
diff changeset
   745
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   746
	def myFirstPage(canvas, doc):
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   747
		canvas.saveState()
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   748
		canvas.setStrokeColor(red)
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   749
		canvas.setLineWidth(5)
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   750
		canvas.line(66,72,66,PAGE_HEIGHT-72)
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   751
		canvas.setFont('Times-Bold',24)
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   752
		canvas.drawString(108, PAGE_HEIGHT-108, "TABLE OF CONTENTS DEMO")
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   753
		canvas.setFont('Times-Roman',12)
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   754
		canvas.drawString(4 * inch, 0.75 * inch, "First Page")
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   755
		canvas.restoreState()
221
3d71b66b14c6 Changes related to removal of SimpleFlowDocument
rgbecker
parents: 218
diff changeset
   756
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   757
	def myLaterPages(canvas, doc):
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   758
		canvas.saveState()
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   759
		canvas.setStrokeColor(red)
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   760
		canvas.setLineWidth(5)
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   761
		canvas.line(66,72,66,PAGE_HEIGHT-72)
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   762
		canvas.setFont('Times-Roman',12)
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   763
		canvas.drawString(4 * inch, 0.75 * inch, "Page %d" % doc.page)
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   764
		canvas.restoreState()
221
3d71b66b14c6 Changes related to removal of SimpleFlowDocument
rgbecker
parents: 218
diff changeset
   765
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   766
	def run():
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   767
		objects_to_draw = []
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   768
		from reportlab.lib.styles import ParagraphStyle
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   769
		#from paragraph import Paragraph
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   770
		from doctemplate import SimpleDocTemplate
221
3d71b66b14c6 Changes related to removal of SimpleFlowDocument
rgbecker
parents: 218
diff changeset
   771
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   772
		#need a style
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   773
		normal = ParagraphStyle('normal')
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   774
		normal.firstLineIndent = 18
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   775
		normal.spaceBefore = 6
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   776
		import random
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   777
		for i in range(15):
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   778
			height = 0.5 + (2*random.random())
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   779
			box = XBox(6 * inch, height * inch, 'Box Number %d' % i)
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   780
			objects_to_draw.append(box)
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   781
			para = Paragraph(randomText(), normal)
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   782
			objects_to_draw.append(para)
221
3d71b66b14c6 Changes related to removal of SimpleFlowDocument
rgbecker
parents: 218
diff changeset
   783
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   784
		SimpleDocTemplate('doctemplate.pdf').build(objects_to_draw,
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   785
			onFirstPage=myFirstPage,onLaterPages=myLaterPages)
221
3d71b66b14c6 Changes related to removal of SimpleFlowDocument
rgbecker
parents: 218
diff changeset
   786
550
1fcf530ec15b Better error message
rgbecker
parents: 512
diff changeset
   787
	run()
221
3d71b66b14c6 Changes related to removal of SimpleFlowDocument
rgbecker
parents: 218
diff changeset
   788