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Python Open Source » Language Interface » PyScript 
PyScript » pyscript 0.6.1 » pyscript » objects.py
# Copyright (C) 2002-2006  Alexei Gilchrist and Paul Cochrane
# 
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

# $Id: objects.py,v 1.50 2006/05/16 05:38:31 aalexei Exp $

"""
Some of the key drawing objects
"""

__revision__ = '$Revision: 1.50 $'

import os, re, sys
import cStringIO

from math import cos,sin,pi

from pyscript.defaults import defaults
from pyscript.vectors import P,Bbox,Matrix
from pyscript.base import PsObj,Color,UNITS
from pyscript.afm import AFM

import warnings

# -------------------------------------------------------------------------
class AffineObj(PsObj):
    '''
    A base class for object that should implement affine
    transformations, this should apply to any object that draws
    on the page.
    '''

    o = P(0, 0)
    T = Matrix(1, 0, 0, 1)

    def concat(self, t, p = None):
        '''
        concat matrix t to tranformation matrix
        @param t: a 2x2 Matrix dectribing Affine transformation
        @param p: the origin for the transformation
        @return: reference to self
        @rtype: self
        '''

        # update transformation matrix
        self.T = t*self.T
        
        #if p is not None:
        #    o=self.o # o is in external co-ords
        #    self.move(p-o)
        #    self.move(t*(o-p))
        

        o = self.o # o is in external co-ords

        # set origin at (0,0)
        self.move(-o)

        # move to transformed p id defined 
        if p is not None:
            self.move(p)
            self.move(t*(-p))

        # move to transformed origin
        self.move(t*o)
       
        return self

    def move(self, *args):
        '''
        translate object by a certain amount
        @param args: amount to move by, can be given as
         - dx,dy
         - P
        @return: reference to self
        @rtype: self
        '''
        if len(args) == 1:
            # assume we have a point
            self.o += args[0]
        else:
            # assume we have dx,dy
            self.o += P(args[0], args[1])

            return self
            
    def rotate(self, angle, p = None):
        """
        rotate object, 
        the rotation is around p when supplied otherwise
        it's the objects origin

        @param angle: angle in degrees, clockwise
        @param p: point to rotate around (external co-ords)
        @return: reference to self
        @rtype: self
        """ 
        angle = angle/180.0*pi # convert angle to radians
        t = Matrix(cos(angle), sin(angle), -sin(angle), cos(angle))
        self.concat(t, p)

        return self

    def scale(self, sx, sy = None, p = None):
        '''
        scale object size (towards objects origin or p)
        @param sx: x scale factor, or total scale factor if sy=None
        @param sy: y scale factor
        @param p: point around which to scale
        @return: reference to self
        @rtype: self
        '''
        if sy is None: 
            sy = sx
        
        t = Matrix(sx, 0, 0, sy)
        self.concat(t, p)
        
        return self

    def reflect(self, angle, p = None):
        '''
        reflect object in mirror
        @param angle: angle of mirror (deg clockwise from top import 
        @param p: origin of reflection
        @return: reference to self
        @rtype: self
        '''
        # convert angle to radians, clockwise from top
        angle = angle/180.0*pi-pi/2 

        t = Matrix(
            cos(angle)**2-sin(angle)**2,
            -2*sin(angle)*cos(angle),
            -2*sin(angle)*cos(angle),
            sin(angle)**2-cos(angle)**2
            )
        
        self.concat(t, p)
        
        return self


    def shear(self, s, angle, p = None):
        '''
        shear object
        @param s: amount of shear
        @param angle: direction of shear (deg clockwise from top import 
        @param p: origin of shear
        @return: reference to self
        @rtype: self
        '''

        self.rotate(angle, p)
        
        t = Matrix(1, 0, -s, 1)
        self.concat(t, p)
        
        self.rotate(-angle, p)
        
        return self
    
        
    def itoe(self, p_i):
        '''
        convert internal to external co-ords
        @param p_i: internal co-ordinate
        @return: external co-ordinate
        @rtype: P
        '''
        assert isinstance(p_i, P), "object not a P()"

        return self.T*p_i+self.o
        
    def etoi(self, p_e):
        '''
        convert external to internal co-ords
        @param p_e: external co-ordinate
        @return: internal co-ordinate
        @rtype: P
        '''
        assert isinstance(p_e, P), "object not a P()"

        return self.T.inverse()*(p_e-self.o)


    def prebody(self):
        '''
        set up transformation of coordinate system
        @rtype: string
        '''
        T = self.T
        o = self.o
        S = "gsave "
        if T == Matrix(1, 0, 0, 1):
            S = S+"%s translate\n" % o
        else:
            # NB postscript matrix is the transpose of what you'd expect!
            S = S+"[%g %g %g %g %s] concat\n" % (T[0], T[2], T[1], T[3], o())
        return S

    def postbody(self):
        '''
        undo coordinate system transformation
        @rtype: string
        '''
        return "grestore\n"


# -------------------------------------------------------------------------

class Area(AffineObj):
    """
    A Rectangular area defined by sw corner and width and height.
    
    defines the following compass points that can be set and retrived::

          nw--n--ne
          |       |
          w   c   e
          |       |
          sw--s--se

    The origin is the sw corner and the others are calculated from the
    width and height attributes.

    If a subclass should have the origin somewhere other than sw then
    overide the sw attribute to make it a function
    
    @cvar width: the width
    @cvar height: the height
    @cvar c: centre point (simillarly for n,ne etc)
    """

    #XXX allow the changing of sw corner away from origin eg Text

    isw = P(0, 0)
    width = 0
    height = 0


    # Dynamic locations
    def _get_n(self):
        """
        Get the "north" point
        """
        return self.itoe(P(self.width/2., self.height)+self.isw)

    def _set_n(self, pe):
        """
        Set the "north" point
        """
        self.move(pe-self.n)
    n = property(_get_n, _set_n)

    def _get_ne(self):
        """
        Get the "north-east" point
        """
        return self.itoe(P(self.width, self.height)+self.isw)

    def _set_ne(self, pe):
        """
        Set the "north-east" point
        """
        self.move(pe-self.ne)
    ne = property(_get_ne, _set_ne)

    def _get_e(self):
        """
        Get the "east" point
        """
        return self.itoe(P(self.width, self.height/2.)+self.isw)

    def _set_e(self, pe):
        """
        Set the "east" point
        """
        self.move(pe-self.e)
    e = property(_get_e, _set_e)

    def _get_se(self):
        """
        Get the "south-east" point
        """
        return self.itoe(P(self.width, 0)+self.isw)

    def _set_se(self, pe):
        """
        Set the "south-east" point
        """
        self.move(pe-self.se)
    se = property(_get_se, _set_se)

    def _get_s(self):
        """
        Get the "south" point
        """
        return self.itoe(P(self.width/2., 0)+self.isw)

    def _set_s(self, pe):
        """
        Set the "south" point
        """
        self.move(pe-self.s)
    s = property(_get_s, _set_s)

    def _get_sw(self):
        """
        Get the "south-west" point
        """
        return self.itoe(self.isw)

    def _set_sw(self, pe):
        """
        Set the "south-west" point
        """
        self.move(pe-self.sw)
    sw = property(_get_sw, _set_sw)

    def _get_w(self):
        """
        Get the "west" point
        """
        return self.itoe(P(0, self.height/2.)+self.isw)

    def _set_w(self, pe):
        """
        Set the "west" point
        """
        self.move(pe-self.w)
    w = property(_get_w, _set_w)

    def _get_nw(self):
        """
        Get the "north-west" point
        """
        return self.itoe(P(0, self.height)+self.isw)

    def _set_nw(self, pe):
        """
        Set the "north-west" point
        """
        self.move(pe-self.nw)
    nw = property(_get_nw, _set_nw)

    def _get_c(self):
        """
        Get the "centre" point
        """
        return self.itoe(P(self.width/2., self.height/2.)+self.isw)
    def _set_c(self, pe):
        """
        Set the "centre" point
        """
        self.move(pe-self.c)
    c = property(_get_c, _set_c)

    def bbox(self):
        """
        Return the bounding box of the object
        """

        x1, y1 = self.sw
        x2, y2 = self.ne

        for p in [self.sw, self.nw, self.ne, self.se]:
            x1 = min(x1, p[0])
            y1 = min(y1, p[1])
            x2 = max(x2, p[0])
            y2 = max(y2, p[1])

        return Bbox(sw = P(x1, y1), width = x2-x1, height = y2-y1)

# -------------------------------------------------------------------------
class TeX(Area):
    '''
    A TeX expression
    (requires working latex and dvips systems)
    
    @cvar fg: TeX color
    @cvar iscale: initial scale for tex
    '''

    text = ""
    iscale = 1
    fg = Color(0)
    bodyps = ""

    def __init__(self, text = "", **options):

        self.text = text

        print "Obtaining TeX object's boundingbox ..."
        
        # this should be a tempfile ?
        tempName = "temp1"
        fp = open("%s.tex"%tempName, "w")
        fp.write(defaults.tex_head)
        fp.write(text)
        fp.write(defaults.tex_tail)
        fp.close()

        foe = os.popen(defaults.tex_command % tempName)
        sys.stderr.write(foe.read(-1))
        sys.stderr.write('\n')
        # Help the user out by throwing the latex log to stderr
        if os.path.exists("%s.log" % tempName):
            fp = open("%s.log" % tempName, 'r')
            sys.stderr.write(fp.read(-1))
            fp.close()
        if foe.close() is not None:
            raise RuntimeError, "Latex Error"


        fi, foe = os.popen4("dvips -q -E -o %s.eps %s.dvi" % \
                (tempName, tempName))
        err = foe.read(-1)
        sys.stderr.write(err)
        sys.stderr.write('\n')
        fi.close()
        if len(err)>0:
            raise RuntimeError, "dvips Error"
    
        fp = open("%s.eps" % tempName, "r")
        eps = fp.read(-1)
        fp.close()
    
        # grab boundingbox ... only thing we want at this stage
        bbox_so = re.search("\%\%boundingbox:\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)",
                          eps, re.I)
        bbox = []
        for ii in bbox_so.groups():
            bbox.append(int(ii))

        self.width = (bbox[2]-bbox[0])/float(defaults.units)
        self.height = (bbox[3]-bbox[1])/float(defaults.units)

        # now we have a width and height we can initialise Area
        Area.__init__(self, **options)

        self.offset = -P(bbox[0], bbox[1])/float(defaults.units)

        self.scale(self.iscale)

    def body(self):
        """
        Returns the object's postscript body
        """
        out = cStringIO.StringIO()

        
        out.write("%s translate "%self.offset)
        out.write("%s\n"%self.fg)
        out.write("%s\n"%self.bodyps)
        return out.getvalue()


# -------------------------------------------------------------------------

class Text(Area):
    '''
    A single line text object
    @cvar font: postscript font name eg "Times-Roman"
    @cvar size: pointsize of the font
    @cvar kerning: use kerning?
    @cvar text: the string to typeset
    @cvar fg: color of the text
    '''
    
    # these all affect the size so should be dynamic
    _text = ''
    _font = "Times-Roman"
    _size = 12
    _kerning = 1
    
    fg = Color(0)

    def __init__(self, text = "", **options):

        # get the bbox
        # first need font and scale BEFORE positioning
        # for efficiency don't use dynamic attributes
        self._text = text
        self._font = options.get('font', self._font)
        self._size = options.get('size', self._size)
        self._kerning = options.get('kerning', self._kerning)
        
        # Now calc sizes from AFM
        self._typeset()

        Area.__init__(self, **options)
        
    def _get_font(self):
        """
        Get the font
        """
        return self._font
    def _set_font(self, fontname):
        """
        Set the font
        """
        self._font = fontname
        self._typeset()
    font = property(_get_font, _set_font)
        
    def _get_size(self):
        """
        Get the font size
        """
        return self._size
    def _set_size(self, size):
        """
        Set the font size
        """
        self._size = size
        self._typeset()
    size = property(_get_size, _set_size)

    def _get_kerning(self):
        """
        Get the kerning information
        """
        return self._kerning
    def _set_kerning(self, kerning):
        """
        Set the kerning information
        """
        self._kerning = kerning
        self._typeset()
    kerning = property(_get_kerning, _set_kerning)

    def _get_text(self):
        """
        Get the text of the Text object
        """
        return self._text
    def _set_text(self, text):
        """
        Set the text of the Text object
        """
        self._text = text
        self._typeset()
    text = property(_get_text, _set_text)
    
    def _typeset(self):
        """
        Typeset the Text object (including kerning info)
        """
        
        string = self.text
        afm = AFM(self._font)
        
        # set the correct postscript font name
        self._font = afm.FontName
        
        size = self.size
        sc = size/1000.

        chars = map(ord, list(string))

        # order: width l b r t

        # use 'reduce' and 'map' as they're written in C

        # add up all the widths
        width = reduce(lambda x, y: x+afm[y][0], chars, 0)

        # subtract the kerning
        if self.kerning == 1:
            if len(chars)>1:
                kerns = map(lambda x, y:afm[(x, y)] , chars[:-1], chars[1:])
                
                charlist = list(string)

                out = "("
                for ii in kerns:
                    if ii != 0:
                        out += charlist.pop(0)+") %s ("%str(ii*sc)
                    else:
                        out += charlist.pop(0)
                out += charlist.pop(0)+")"
                
                settext = out

                kern = reduce(lambda x, y:x+y, kerns)
                            
                width += kern
            else:
                # this is to catch the case when there are no characters
                # in the string, but self.kerning==1
                settext = "("+string+")"

        else:
            settext = "("+string+")"

        # get rid of the end bits
        start = afm[chars[0]][1]
        f = afm[chars[-1]]
        width = width-start-(f[0]-f[3])

        # accumulate maximum height
        top = reduce(lambda x, y: max(x, afm[y][4]), chars, 0)

        # accumulate lowest point
        bottom = reduce(lambda x, y: min(x, afm[y][2]), chars, afm[chars[0]][2])

        x1 = start*sc
        y1 = bottom*sc
        x2 = x1+width*sc
        y2 = top*sc

        self.settext = settext
        self.offset = -P(x1, y1)/float(defaults.units)
        self.width = (x2-x1)/float(defaults.units)
        self.height = (y2-y1)/float(defaults.units)

    def body(self):
        """
        Returns the object's postscript body
        """
        out = cStringIO.StringIO()

        ATTR = {'font':self.font,
              'fg':self.fg,
              'size':self.size,
              'settext':self.settext,
              'offset':self.offset}
        
        out.write("%(offset)s moveto\n" % ATTR)
        out.write("/%(font)s %(size)s selectfont %(fg)s \n" % ATTR)
        out.write("mark %(settext)s kernshow\n" % ATTR)

        return out.getvalue()


# -------------------------------------------------------------------------
# Rectangle
# -------------------------------------------------------------------------
class Rectangle(Area):
    """
    Draw a rectangle 

    @cvar linewidth: the line thickness in points
    @type linewidth: float

    @cvar dash: a Dash() object giving the dash pattern to use 
    @type dash: L{Dash} object

    @cvar fg: line color
    @type fg: L{Color} object

    @cvar bg: fill color or None for empty
    @type bg: L{Color} object

    @cvar r: radius of corners (saturates at min(width/2,height/2))
    @type r: float

    @cvar width: width of rectangle
    @type width: float

    @cvar height: height of rectangle
    @type height: float
    """

    bg = None
    fg = Color(0)
    r = 0.0
    linewidth = None
    dash = None
    width = 1.0
    height = 1.0

    def __init__(self, obj=None, **options):
        '''
        @param obj:
            for Area() or Bbox(), the size and position will
            be taken from obj import 
        '''

        if isinstance(obj, Area) or isinstance(obj, Bbox):
            options['sw'] = obj.sw
            options['width'] = obj.width
            options['height'] = obj.height
            
        Area.__init__(self, **options)
    
    def body(self):
        """
        Returns the object's postscript body
        """
        
        out = cStringIO.StringIO()
        
        if self.linewidth:
            out.write("%g setlinewidth "%self.linewidth)

        if self.dash is not None:
            out.write(str(self.dash))
        
        # make sure we have a sensible radius
        r = min(self.width/2., self.height/2., self.r)
        w = self.width
        h = self.height
        
        ATTR = {'bg':self.bg,
              'fg':self.fg,
              'width':w,
              'height':h,
              'r':r,
              'ne':P(w, h),
              'n':P(w/2., h),
              'nw':P(0, h),
              'w':P(0, h/2.),
              'sw':P(0, 0),
              's':P(w/2., 0),
              'se':P(w, 0),
              'e':P(w, h/2.),
              }
                
        if self.bg is not None:
            if self.r == 0:
                out.write("%(bg)s 0 0 %(width)g uu %(height)g uu rectfill\n"\
                        % ATTR)
            else:
                out.write("%(bg)s newpath %(w)s moveto\n" % ATTR)
                out.write("%(nw)s %(n)s %(r)s uu arcto 4 {pop} repeat\n" % ATTR)
                out.write("%(ne)s %(e)s %(r)s uu arcto 4 {pop} repeat\n" % ATTR)
                out.write("%(se)s %(s)s %(r)s uu arcto 4 {pop} repeat\n" % ATTR)
                out.write("%(sw)s %(w)s %(r)s uu arcto 4 {pop} repeat\n" % ATTR)
                out.write("closepath fill\n")
                
        if self.fg is not None:
            if self.r == 0:
                out.write("%(fg)s 0 0 %(width)g uu %(height)g uu rectstroke\n"\
                                % ATTR)
            else:
                out.write("%(fg)s newpath %(w)s moveto\n" % ATTR)
                out.write("%(nw)s %(n)s %(r)s uu arcto 4 {pop} repeat\n" % ATTR)
                out.write("%(ne)s %(e)s %(r)s uu arcto 4 {pop} repeat\n" % ATTR)
                out.write("%(se)s %(s)s %(r)s uu arcto 4 {pop} repeat\n" % ATTR)
                out.write("%(sw)s %(w)s %(r)s uu arcto 4 {pop} repeat\n" % ATTR)
                out.write("closepath stroke\n")
                
        return out.getvalue()


# -------------------------------------------------------------------------
class Circle(AffineObj):
    """
    Draw a circle, or part of. Generate ellipses by scaling. 
    The origin is the center
    
    @cvar r: radius
    @type r: float

    @cvar start: starting angle for arc
    @type start: float

    @cvar end: end angle for arc
    @type end: float

    @cvar c: (also n, ne,...) as for L{Area}
    @type c: L{P} object

    @cvar linewidth: width of the lines
    @type linewidth: float

    @cvar dash: Dash() object giving dash pattern to use
    @type dash: L{Dash} object
    """

    bg = None
    fg = Color(0)
    r = 1.0
    start = 0.0
    end = 360.0
    linewidth = None
    dash = None
    
    def locus(self, angle, target=None):
        '''
        Set or get a point on the locus
        
        @param angle: locus point in degrees
            (Degrees clockwise from north import 
        @type angle: float

        @param target: target point
        @return: 
            - target is None: point on circumference at that angle
            - else: set point to the target, and return reference
                    to object
        @rtype: self or P
        '''
        r = self.r
        x = r*sin(angle/180.0*pi)
        y = r*cos(angle/180.0*pi)
        l = P(x, y)

        if target is None:
            return self.itoe(l)
        else:
            self.move(target-self.locus(angle))
            return self
    
    # some named locations
    def _get_c(self):
        """
        Get the "centre" point
        """
        return self.o

    def _set_c(self, pe):
        """
        Set the "centre" point
        """
        self.move(pe-self.o)
    c = property(_get_c, _set_c)

    def _get_n(self):
        """
        Get the "north" point
        """
        return self.locus(0)
    
    def _set_n(self, pe):
        """
        Set the "north" point
        """
        self.locus(0, pe)
    n = property(_get_n, _set_n)

    def _get_e(self):
        """
        Get the "east" point
        """
        return self.locus(90)

    def _set_e(self, pe):
        """
        Set the "east" point
        """
        self.locus(90, pe)
    e = property(_get_e, _set_e)

    def _get_s(self):
        """
        Get the "south" point
        """
        return self.locus(180)

    def _set_s(self, pe):
        """
        Set the "south" point
        """
        self.locus(180, pe)
    s = property(_get_s, _set_s)

    def _get_w(self):
        """
        Get the "west" point
        """
        return self.locus(270)

    def _set_w(self, pe):
        """
        Set the "west" point
        """
        self.locus(270, pe)
    w = property(_get_w, _set_w)

    # these are of the square that holds the circle
    def _get_ne(self):
        """
        Get the "nort-east" point
        """
        return self.itoe(P(self.r, self.r))

    def _set_ne(self, pe):
        """
        Set the "north-east" point
        """
        self.move(pe-self.ne)
    ne = property(_get_ne, _set_ne)

    def _get_nw(self):
        """
        Get the "nort-west" point
        """
        return self.itoe(P(-self.r, self.r))

    def _set_nw(self, pe):
        """
        Set the "nort-west" point
        """
        self.locus(315, pe)
        self.move(pe-self.nw)
    nw = property(_get_nw, _set_nw)

    def _get_se(self):
        """
        Get the "south-east" point
        """
        return self.itoe(P(self.r, -self.r))

    def _set_se(self, pe):
        """
        Set the "south-east" point
        """
        self.locus(135, pe)
        self.move(pe-self.se)
    se = property(_get_se, _set_se)

    def _get_sw(self):
        """
        Get the "south-west" point
        """
        return self.itoe(P(-self.r, -self.r))

    def _set_sw(self, pe):
        """
        Set the "south-west" point
        """
        self.locus(235, pe)
        self.move(pe-self.sw)
    sw = property(_get_sw, _set_sw)

    def body(self):
        """
        Returns the object's postscript body
        """
        out = cStringIO.StringIO()

        if self.linewidth:
            out.write("%g setlinewidth " % self.linewidth)

        if self.dash is not None:
            out.write(str(self.dash))

        # By default postscript goes anti-clockwise
        # and starts from 'e' ... fix it so it goes
        # clockwise and starts from 'n'

        ATTR = {'bg':self.bg,
              'fg':self.fg,
              'r':self.r,
              'start':self.start,
              'end':self.end}

        if self.bg is not None:
            out.write("%(bg)s 0 0 %(r)g uu 360 %(start)g -1 mul add 90 " 
                    "add 360 %(end)g -1 mul add 90 add arcn fill\n" % ATTR)

        if self.fg is not None:
            out.write("%(fg)s 0 0 %(r)g uu 360 %(start)g -1 mul add 90 "
                    "add 360 %(end)g -1 mul add 90 add arcn stroke\n" % ATTR)

        return out.getvalue()

    def bbox(self):
        """
        Return the bounding box object of the Circle
        """

        #grab a tight boundingbox by zipping around circumference

        SW = self.locus(0)
        NE = self.locus(0)
        for ii in xrange(self.start, self.end+10, 10):
            p = self.locus(ii)

            SW[0] = min(SW[0], p[0])
            SW[1] = min(SW[1], p[1])
            NE[0] = max(NE[0], p[0])
            NE[1] = max(NE[1], p[1])


        return Bbox(sw = SW, width = NE[0]-SW[0], height = NE[1]-SW[1])

# -------------------------------------------------------------------------
class Dot(Circle):
    '''
    draw a dot at the given location
    @cvar r: dot radius
    @cvar bg: dot color
    @cvar fg: dot border color
    '''
    r = .05
    bg = Color(0)
    fg = None

    def __init__(self, p1 = P(0, 0), p2 = 0, **options):
        if isinstance(p1, P):
            c = p1
        else:
            c = P(p1, p2)
        Circle.__init__(self, **options)
        self.c = c

    def bbox(self):
        """
        Return the bounding box of the Dot
        """
        
        return Bbox(sw = self.sw, width = 2*self.r, height = 2*self.r)




# -------------------------------------------------------------------------

class Paper(Area):
    '''
    returns an area object the size of one of the standard paper sizes
    
    B{Class deprecated - use Page instead}
    '''

    size = None
    orientation = "portrait"

    # PAPERSIZES taken from gs man page (x cm,y cm)
    PAPERSIZES = {
        "a0":         (83.9611, 118.816),
        "a1":         (59.4078, 83.9611),
        "a2":         (41.9806, 59.4078),
        "a3":         (29.7039, 41.9806),
        "a4":         (20.9903, 29.7039),
        "a4r":        (29.7039, 20.9903),  # rotated version of a4
        "a5":         (14.8519, 20.9903),
        "a6":         (10.4775, 14.8519),
        "a7":         (7.40833, 10.4775),
        "a8":         (5.22111, 7.40833),
        "a9":         (3.70417, 5.22111),
        "a10":        (2.61056, 3.70417),
        "b0":         (100.048, 141.393),
        "b1":         (70.6967, 100.048),
        "b2":         (50.0239, 70.6967),
        "b3":         (35.3483, 50.0239),
        "b4":         (25.0119, 35.3483),
        "b5":         (17.6742, 25.0119),
        "archA":      (22.86  , 30.48),
        "archB":      (30.48  , 45.72),
        "archC":      (45.72  , 60.96),
        "archD":      (60.96  , 91.44),
        "archE":      (91.44  , 121.92),
        "flsa":       (21.59  , 33.02),
        "flse":       (21.59  , 33.02),
        "halfletter": (13.97  , 21.59),
        "note":       (19.05  , 25.4 ),
        "letter":     (21.59  , 27.94),
        "legal":      (21.59  , 35.56),
        "11x17":      (27.94  , 43.18),
        "ledger":     (43.18  , 27.94),
        }

    def __init__(self, size, **options):
        '''
        @param size: eg "a4","letter" etc. See L{PAPERSIZES} for sizes
        @return: An area object the size of the selected paper
                 with the sw corner on P(0,0)
        '''
        warnings.warn("Paper() class deprecated .. use Page()")
        
        self.size = size
        orientation = options.get("orientation", self.orientation)
        
        if orientation == "portrait":
            w, h = self.PAPERSIZES[size]
        else:
            h, w = self.PAPERSIZES[size]
        
        self.width = w*UNITS['cm']/float(defaults.units)
        self.height = h*UNITS['cm']/float(defaults.units)

        Area.__init__(self, **options)

# -------------------------------------------------------------------------

class Epsf(Area):
    '''
    Load an Eps from file import 

    @cvar width: on init - set width to this
    @type width: float

    @cvar height: on init - set height to this
    @type height: float
    '''

    def __init__(self, file, **options):
        '''
        @param file: path to epsf file
        @type file: string

        @return: The eps figure as an area object
        '''

        self.file = file

        print "Loading %s" % file
        
        fp = open(file, 'r')
        self.all = fp.read(-1)
        fp.close()

        bbox_so = re.compile(
                "\%\%boundingbox:\s+(-?\d+)\s+(-?\d+)\s+(-?\d+)\s+(-?\d+)", 
                re.I|re.S)
        
        so = bbox_so.search(self.all)
        x1s, y1s, x2s, y2s = so.groups()

        d = float(defaults.units)
        x1 = float(x1s)/d
        y1 = float(y1s)/d
        x2 = float(x2s)/d
        y2 = float(y2s)/d

        self.offset = -P(x1, y1)

        self.width = x2-x1
        self.height = y2-y1

        # width and height have special meaning here
        if options.has_key('width') and options.has_key('height'):
            sx = options['width']/float(self.width)
            sy = options['height']/float(self.height)
            del options['width']
            del options['height']
        elif options.has_key('width'):
            sx = sy = options['width']/float(self.width)
            del options['width']
        elif options.has_key('height'):
            sx = sy = options['height']/float(self.height)
            del options['height']
        else:
            sx = sy = 1
            
        self.scale(sx, sy)

        Area.__init__(self, **options)

    def body(self):
        """
        Return the body of the object's postcript
        """
        
        out = cStringIO.StringIO()

        out.write("BeginEPSF\n")
        out.write("%s translate \n" % self.offset)

        out.write("%%%%BeginDocument: %s\n" % self.file)
        out.write(self.all)
        out.write("%%EndDocument\n")
        out.write("EndEPSF\n")
        
        return out.getvalue()


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