#copyright ReportLab Inc. 2000

#see license.txt for license details

#history http://cvs.sourceforge.net/cgi-bin/cvsweb.cgi/reportlab/platypus/paraparser.py?cvsroot=reportlab

import string

import re

from types import TupleType

import sys

import os

import copy

import reportlab.lib.sequencer

from reportlab.lib.abag import ABag

from reportlab.lib.utils import _checkImportError

try:

    from reportlab.lib import xmllib

    _xmllib_newStyle = 1

except ImportError, errMsg:

    _checkImportError(errMsg)

    import xmllib

    _xmllib_newStyle = 0

from reportlab.lib.colors import toColor, white, black, red, Color

from reportlab.lib.fonts import tt2ps, ps2tt

from reportlab.lib.enums import TA_LEFT, TA_RIGHT, TA_CENTER, TA_JUSTIFY

_re_para = re.compile('^\\s*<\\s*para(\\s+|>)')

sizeDelta = 2       # amount to reduce font size by for super and sub script

subFraction = 0.5   # fraction of font size that a sub script should be lowered

superFraction = 0.5 # fraction of font size that a super script should be raised

def _num(s):

    if s[0] in ['+','-']:

        try:

            return ('relative',int(s))

        except ValueError:

            return ('relative',float(s))

    else:

        try:

            return int(s)

        except ValueError:

            return float(s)

def _align(s):

    s = string.lower(s)

    if s=='left': return TA_LEFT

    elif s=='right': return TA_RIGHT

    elif s=='justify': return TA_JUSTIFY

    elif s in ('centre','center'): return TA_CENTER

    else: raise ValueError

_paraAttrMap = {'font': ('fontName', None),

                'face': ('fontName', None),

                'fontsize': ('fontSize', _num),

                'size': ('fontSize', _num),

                'leading': ('leading', _num),

                'lindent': ('leftIndent', _num),

                'rindent': ('rightIndent', _num),

                'findent': ('firstLineIndent', _num),

                'align': ('alignment', _align),

                'spaceb': ('spaceBefore', _num),

                'spacea': ('spaceAfter', _num),

                'bfont': ('bulletFontName', None),

                'bfontsize': ('bulletFontSize',_num),

                'bindent': ('bulletIndent',_num),

                'bcolor': ('bulletColor',toColor),

                'color':('textColor',toColor),

                'backcolor':('backColor',toColor),

                'bgcolor':('backColor',toColor),

                'bg':('backColor',toColor),

                'fg': ('textColor',toColor)}

_bulletAttrMap = {

                'font': ('bulletFontName', None),

                'face': ('bulletFontName', None),

                'size': ('bulletFontSize',_num),

                'fontsize': ('bulletFontSize',_num),

                'indent': ('bulletIndent',_num),

                'color': ('bulletColor',toColor),

                'fg': ('bulletColor',toColor)}

#things which are valid font attributes

_fontAttrMap = {'size': ('fontSize', _num),

                'face': ('fontName', None),

                'name': ('fontName', None),

                'fg':   ('textColor', toColor),

                'color':('textColor', toColor)}

def _addAttributeNames(m):

    K = m.keys()

    for k in K:

        n = string.lower(m[k][0])

        if not m.has_key(n):

            m[n] = m[k]

_addAttributeNames(_paraAttrMap)

_addAttributeNames(_fontAttrMap)

_addAttributeNames(_bulletAttrMap)

def _applyAttributes(obj, attr):

    for k, v in attr.items():

        if type(v) is TupleType and v[0]=='relative':

            #AR 20/5/2000 - remove 1.5.2-ism

            #v = v[1]+getattr(obj,k,0)

            if hasattr(obj, k):

                v = v[1]+getattr(obj,k)

            else:

                v = v[1]

        setattr(obj,k,v)

greeks = {

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

class ParaFrag(ABag):

    """class ParaFrag contains the intermediate representation of string

    segments as they are being parsed by the XMLParser.

    fontname, fontSize, rise, textColor, cbDefn

    """

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

# !!! NOTE !!! THIS TEXT IS NOW REPLICATED IN PARAGRAPH.PY !!!

# The ParaFormatter will be able to format the following xml

# tags:

#       < /b > - bold

#       < /i > - italics

#       < u > < /u > - underline

#       < super > < /super > - superscript

#       < sup > < /sup > - superscript

#       < sub > < /sub > - subscript

#       <font name=fontfamily/fontname color=colorname size=float>

#       < bullet > </bullet> - bullet text (at head of para only)

#       <onDraw name=callable label="a label">

#

#       The whole may be surrounded by <para> </para> tags

#

# It will also be able to handle any MathML specified Greek characters.

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

class ParaParser(xmllib.XMLParser):

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

    # First we will define all of the xml tag handler functions.

    #

    # start_<tag>(attributes)

    # end_<tag>()

    #

    # While parsing the xml ParaFormatter will call these

    # functions to handle the string formatting tags.

    # At the start of each tag the corresponding field will

    # be set to 1 and at the end tag the corresponding field will

    # be set to 0.  Then when handle_data is called the options

    # for that data will be aparent by the current settings.

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

    #### bold

    def start_b( self, attributes ):

        self._push(bold=1)

    def end_b( self ):

        self._pop(bold=1)

    #### italics

    def start_i( self, attributes ):

        self._push(italic=1)

    def end_i( self ):

        self._pop(italic=1)

    #### underline

    def start_u( self, attributes ):

        self._push(underline=1)

    def end_u( self ):

        self._pop(underline=1)

    #### super script

    def start_super( self, attributes ):

        self._push(super=1)

    def end_super( self ):

        self._pop(super=1)

    if _xmllib_newStyle:

        start_sup = start_super

        end_sup = end_super

    #### sub script

    def start_sub( self, attributes ):

        self._push(sub=1)

    def end_sub( self ):

        self._pop(sub=1)

    #### greek script

    if _xmllib_newStyle:

        def handle_entityref(self,name):

            if greeks.has_key(name):

                self._push(greek=1)

                self.handle_data(greeks[name])

                self._pop(greek=1)

            else:

                xmllib.XMLParser.handle_entityref(self,name)

        def syntax_error(self,lineno,message):

            self._syntax_error(message)