# -*- coding: cp1252 -*-

##
# <p> Portions copyright © 2005-2006 Stephen John Machin, Lingfo Pty Ltd</p>
# <p>This module is part of the xlrd package, which is released under a BSD-style licence.</p>
##

# 2007-04-22 SJM Remove experimental "trimming" facility.

from biffh import *
from timemachine import *
from struct import unpack
from formula import dump_formula, decompile_formula, rangename2d
from formatting import nearest_colour_index
import time

DEBUG = 0

_WINDOW2_options = (
    # Attribute names and initial values to use in case
    # a WINDOW2 record is not written.
    ("show_formulas", 0),
    ("show_grid_lines", 1),
    ("show_sheet_headers", 1),
    ("panes_are_frozen", 0),
    ("show_zero_values", 1),
    ("automatic_grid_line_colour", 1),
    ("columns_from_right_to_left", 0),
    ("show_outline_symbols", 1),
    ("remove_splits_if_pane_freeze_is_removed", 0),
    ("sheet_selected", 0),
    # "sheet_visible" appears to be merely a clone of "sheet_selected".
    # The real thing is the visibility attribute from the BOUNDSHEET record.
    ("sheet_visible", 0), 
    ("show_in_page_break_preview", 0),
    )

##
# <p>Contains the data for one worksheet.</p>
#
# <p>In the cell access functions, "rowx" is a row index, counting from zero, and "colx" is a
# column index, counting from zero.
# Negative values for row/column indexes and slice positions are supported in the expected fashion.</p>
#
# <p>For information about cell types and cell values, refer to the documentation of the Cell class.</p>
#
# <p>WARNING: You don't call this class yourself. You access Sheet objects via the Book object that
# was returned when you called xlrd.open_workbook("myfile.xls").</p>

    
class Sheet(BaseObject):
    ##
    # Name of sheet.
    name = ''

    ##
    # Number of rows in sheet. A row index is in range(thesheet.nrows).
    nrows = 0

    ##
    # Number of columns in sheet. A column index is in range(thesheet.ncols).
    ncols = 0

    ##
    # The map from a column index to a Colinfo object. Often there is an entry
    # in COLINFO records for all column indexes in range(257).
    # Note that xlrd ignores the entry for the non-existent
    # 257th column. On the other hand, there may be no entry for unused columns.
    # <br /> -- New in version 0.6.1
    colinfo_map = {}

    ##
    # The map from a row index to a Rowinfo object. Note that it is possible
    # to have missing entries -- at least one source of XLS files doesn't
    # bother writing ROW records.
    # <br /> -- New in version 0.6.1
    rowinfo_map = {}

    ##
    # List of address ranges of cells containing column labels.
    # These are set up in Excel by Insert > Name > Labels > Columns.
    # <br> -- New in version 0.6.0
    # <br>How to deconstruct the list:
    # <pre>
    # for crange in thesheet.col_label_ranges:
    #     rlo, rhi, clo, chi = crange
    #     for rx in xrange(rlo, rhi):
    #         for cx in xrange(clo, chi):
    #             print "Column label at (rowx=%d, colx=%d) is %r" \
    #                 (rx, cx, thesheet.cell_value(rx, cx))
    # </pre>
    col_label_ranges = []

    ##
    # List of address ranges of cells containing row labels.
    # For more details, see <i>col_label_ranges</i> above.
    # <br> -- New in version 0.6.0
    row_label_ranges = []

    ##
    # List of address ranges of cells which have been merged.
    # These are set up in Excel by Format > Cells > Alignment, then ticking
    # the "Merge cells" box.
    # <br> -- New in version 0.6.1
    # <br>How to deconstruct the list:
    # <pre>
    # for crange in thesheet.merged_cells:
    #     rlo, rhi, clo, chi = crange
    #     for rowx in xrange(rlo, rhi):
    #         for colx in xrange(clo, chi):
    #             # cell (rlo, clo) (the top left one) will carry the data
    #             # and formatting info; the remainder will be recorded as
    #             # blank cells, but a renderer will apply the formatting info
    #             # for the top left cell (e.g. border, pattern) to all cells in
    #             # the range.
    # </pre>
    merged_cells = []

    ##
    # Default column width from DEFCOLWIDTH record, else None.
    # From the OOo docs:<br />
    # """Column width in characters, using the width of the zero character
    # from default font (first FONT record in the file). Excel adds some
    # extra space to the default width, depending on the default font and
    # default font size. The algorithm how to exactly calculate the resulting
    # column width is not known.<br />
    # Example: The default width of 8 set in this record results in a column
    # width of 8.43 using Arial font with a size of 10 points."""<br />
    # For the default hierarchy, refer to the Colinfo class above.
    # <br /> -- New in version 0.6.1
    defcolwidth = None

    ##
    # Default column width from STANDARDWIDTH record, else None.
    # From the OOo docs:<br />
    # """Default width of the columns in 1/256 of the width of the zero
    # character, using default font (first FONT record in the file)."""<br />
    # For the default hierarchy, refer to the Colinfo class above.
    # <br /> -- New in version 0.6.1
    standardwidth = None

    ##
    # Default value to be used for a row if there is
    # no ROW record for that row.
    # From the <i>optional</i> DEFAULTROWHEIGHT record.
    default_row_height = None

    ##
    # Default value to be used for a row if there is
    # no ROW record for that row.
    # From the <i>optional</i> DEFAULTROWHEIGHT record.
    default_row_height_mismatch = None

    ##
    # Default value to be used for a row if there is
    # no ROW record for that row.
    # From the <i>optional</i> DEFAULTROWHEIGHT record.
    default_row_hidden = None

    ##
    # Default value to be used for a row if there is
    # no ROW record for that row.
    # From the <i>optional</i> DEFAULTROWHEIGHT record.
    default_additional_space_above = None

    ##
    # Default value to be used for a row if there is
    # no ROW record for that row.
    # From the <i>optional</i> DEFAULTROWHEIGHT record.
    default_additional_space_below = None
    
    ##
    # Visibility of the sheet. 0 = visible, 1 = hidden (can be unhidden
    # by user -- Format/Sheet/Unhide), 2 = "very hidden" (can be unhidden
    # only by VBA macro).
    visibility = 0
    
    ##
    # A 256-element tuple corresponding to the contents of the GCW record for this sheet.
    # If no such record, treat as all bits zero.
    # Applies to BIFF4-7 only. See docs of Colinfo class for discussion.
    gcw = (0, ) * 256

    def __init__(self, book, position, name, number):
        self.book = book
        self.biff_version = book.biff_version
        self._position = position
        self.logfile = book.logfile
        self.pickleable = book.pickleable
        self.dont_use_array = not(array_array and (CAN_PICKLE_ARRAY or not book.pickleable))
        self.name = name
        self.number = number
        self.verbosity = book.verbosity
        self.formatting_info = book.formatting_info
        self._xf_index_to_xl_type_map = book._xf_index_to_xl_type_map
        self.nrows = 0 # actual, including possibly empty cells
        self.ncols = 0
        self._maxdatarowx = -1 # highest rowx containing a non-empty cell
        self._maxdatacolx = -1 # highest colx containing a non-empty cell
        self._dimnrows = 0 # as per DIMENSIONS record
        self._dimncols = 0
        self._cell_values = []
        self._cell_types = []
        self._cell_xf_indexes = []
        self._need_fix_ragged_rows = 0
        self.defcolwidth = None
        self.standardwidth = None
        self.default_row_height = None
        self.default_row_height_mismatch = 0
        self.default_row_hidden = 0
        self.default_additional_space_above = 0
        self.default_additional_space_below = 0
        self.colinfo_map = {}
        self.rowinfo_map = {}
        self.col_label_ranges = []
        self.row_label_ranges = []
        self.merged_cells = []
        self._xf_index_stats = [0, 0, 0, 0]
        self.visibility = book._sheet_visibility[number] # from BOUNDSHEET record
        for attr, defval in _WINDOW2_options:
            setattr(self, attr, defval)
        self.first_visible_rowx = 0
        self.first_visible_colx = 0
        self.gridline_colour_index = 0x40
        self.gridline_colour_rgb = None # pre-BIFF8
        self.cached_page_break_preview_mag_factor = 0
        self.cached_normal_view_mag_factor = 0
        
        #### Don't initialise this here, use class attribute initialisation.
        #### self.gcw = (0, ) * 256 #### 
        
        if self.biff_version >= 80:
            self.utter_max_rows = 65536
        else:
            self.utter_max_rows = 16384

    ##
    # Cell object in the given row and column.
    def cell(self, rowx, colx):
        if self.formatting_info:
            xfx = self.cell_xf_index(rowx, colx)
        else:
            xfx = None
        return Cell(
            self._cell_types[rowx][colx],
            self._cell_values[rowx][colx],
            xfx,
            )

    ##
    # Value of the cell in the given row and column.
    def cell_value(self, rowx, colx):
        return self._cell_values[rowx][colx]

    ##
    # Type of the cell in the given row and column.
    # Refer to the documentation of the Cell class.
    def cell_type(self, rowx, colx):
        return self._cell_types[rowx][colx]

    ##
    # XF index of the cell in the given row and column.
    # This is an index into Book.raw_xf_list and Book.computed_xf_list.
    # <br /> -- New in version 0.6.1
    def cell_xf_index(self, rowx, colx):
        self.req_fmt_info()
        xfx = self._cell_xf_indexes[rowx][colx]
        if xfx > -1:
            self._xf_index_stats[0] += 1
            return xfx
        # Check for a row xf_index
        try:
            xfx = self.rowinfo_map[rowx].xf_index
            if xfx > -1:
                self._xf_index_stats[1] += 1
                return xfx
        except KeyError:
            pass
        # Check for a column xf_index
        try:
            xfx = self.colinfo_map[colx].xf_index
            assert xfx > -1
            self._xf_index_stats[2] += 1
            return xfx
        except KeyError:
            # If all else fails, 15 is used as hardwired global default xf_index.
            self._xf_index_stats[3] += 1
            return 15

    ##
    # Returns a sequence of the Cell objects in the given row.
    def row(self, rowx):
        return [
            self.cell(rowx, colx)
            for colx in xrange(self.ncols)
            ]

    ##
    # Returns a slice of the types
    # of the cells in the given row.
    def row_types(self, rowx, start_colx=0, end_colx=None):
        if end_colx is None:
            return self._cell_types[rowx][start_colx:]
        return self._cell_types[rowx][start_colx:end_colx]

    ##
    # Returns a slice of the values
    # of the cells in the given row.
    def row_values(self, rowx, start_colx=0, end_colx=None):
        if end_colx is None:
            return self._cell_values[rowx][start_colx:]
        return self._cell_values[rowx][start_colx:end_colx]

    ##
    # Returns a slice of the Cell objects in the given row.
    def row_slice(self, rowx, start_colx=0, end_colx=None):
        nc = self.ncols
        if start_colx < 0:
            start_colx += nc
            if start_colx < 0:
                start_colx = 0
        if end_colx is None or end_colx > nc:
            end_colx = nc
        elif end_colx < 0:
            end_colx += nc
        return [
            self.cell(rowx, colx)
            for colx in xrange(start_colx, end_colx)
            ]

    ##
    # Returns a slice of the Cell objects in the given column.
    def col_slice(self, colx, start_rowx=0, end_rowx=None):
        nr = self.nrows
        if start_rowx < 0:
            start_rowx += nr
            if start_rowx < 0:
                start_rowx = 0
        if end_rowx is None or end_rowx > nr:
            end_rowx = nr
        elif end_rowx < 0:
            end_rowx += nr
        return [
            self.cell(rowx, colx)
            for rowx in xrange(start_rowx, end_rowx)
            ]

    ##
    # Returns a slice of the values of the cells in the given column.
    def col_values(self, colx, start_rowx=0, end_rowx=None):
        nr = self.nrows
        if start_rowx < 0:
            start_rowx += nr
            if start_rowx < 0:
                start_rowx = 0
        if end_rowx is None or end_rowx > nr:
            end_rowx = nr
        elif end_rowx < 0:
            end_rowx += nr
        return [
            self._cell_values[rowx][colx]
            for rowx in xrange(start_rowx, end_rowx)
            ]

    ##
    # Returns a slice of the types of the cells in the given column.
    def col_types(self, colx, start_rowx=0, end_rowx=None):
        nr = self.nrows
        if start_rowx < 0:
            start_rowx += nr
            if start_rowx < 0:
                start_rowx = 0
        if end_rowx is None or end_rowx > nr:
            end_rowx = nr
        elif end_rowx < 0:
            end_rowx += nr
        return [
            self._cell_types[rowx][colx]
            for rowx in xrange(start_rowx, end_rowx)
            ]

    ##
    # Returns a sequence of the Cell objects in the given column.
    def col(self, colx):
        return self.col_slice(colx)
    # Above two lines just for the docs. Here's the real McCoy:
    col = col_slice

    # === Following methods are used in building the worksheet.
    # === They are not part of the API.

    def extend_cells(self, nr, nc):
        # print "extend_cells_2", self.nrows, self.ncols, nr, nc
        assert 1 <= nc <= 256
        assert 1 <= nr <= self.utter_max_rows
        if nr <= self.nrows:
            # New cell is in an existing row, so extend that row (if necessary).
            # Note that nr < self.nrows means that the cell data
            # is not in ascending row order!!
            self._need_fix_ragged_rows = 1
            nrx = nr - 1
            trow = self._cell_types[nrx]
            tlen = len(trow)
            nextra = max(nc, self.ncols) - tlen
            if nextra > 0:
                xce = XL_CELL_EMPTY
                if self.dont_use_array:
                    trow.extend([xce] * nextra)
                    if self.formatting_info:
                        self._cell_xf_indexes[nrx].extend([-1] * nextra)
                else:
                    aa = array_array
                    trow.extend(aa('B', [xce]) * nextra)
                    if self.formatting_info:
                        self._cell_xf_indexes[nrx].extend(aa('h', [-1]) * nextra)
                self._cell_values[nrx].extend([''] * nextra)
        if nc > self.ncols:
            self.ncols = nc
            self._need_fix_ragged_rows = 1
        if nr > self.nrows:
            scta = self._cell_types.append
            scva = self._cell_values.append
            scxa = self._cell_xf_indexes.append
            fmt_info = self.formatting_info
            xce = XL_CELL_EMPTY
            nc = self.ncols
            if self.dont_use_array:
                for _unused in xrange(self.nrows, nr):
                    scta([xce] * nc)
                    scva([''] * nc)
                    if fmt_info:
                        scxa([-1] * nc)
            else:
                aa = array_array
                for _unused in xrange(self.nrows, nr):
                    scta(aa('B', [xce]) * nc)
                    scva([''] * nc)
                    if fmt_info:
                        scxa(aa('h', [-1]) * nc)
            self.nrows = nr

    def fix_ragged_rows(self):
        t0 = time.time()
        ncols = self.ncols
        xce = XL_CELL_EMPTY
        aa = array_array
        s_cell_types = self._cell_types
        s_cell_values = self._cell_values
        s_cell_xf_indexes = self._cell_xf_indexes
        s_dont_use_array = self.dont_use_array
        s_fmt_info = self.formatting_info
        totrowlen = 0
        for rowx in xrange(self.nrows):
            trow = s_cell_types[rowx]
            rlen = len(trow)
            totrowlen += rlen
            nextra = ncols - rlen
            if nextra > 0:
                s_cell_values[rowx][rlen:] = [''] * nextra
                if s_dont_use_array:
                    trow[rlen:] = [xce] * nextra
                    if s_fmt_info:
                        s_cell_xf_indexes[rowx][rlen:] = [-1] * nextra
                else:
                    trow.extend(aa('B', [xce]) * nextra)
                    if s_fmt_info:
                        s_cell_xf_indexes[rowx][rlen:] = aa('h', [-1]) * nextra
        self._fix_ragged_rows_time = time.time() - t0
        if 0 and self.nrows:
            avgrowlen = float(totrowlen) / self.nrows
            print >> self.logfile, \
                "sheet %d: avg row len %.1f; max row len %d" \
                % (self.number, avgrowlen, self.ncols)

    def tidy_dimensions(self):
        if self.verbosity >= 3:
            fprintf(self.logfile,
                "tidy_dimensions: nrows=%d ncols=%d _need_fix_ragged_rows=%d\n",
                self.nrows, self.ncols, self._need_fix_ragged_rows,
                )
        if 1 and self.merged_cells:
            nr = nc = 0
            umaxrows = self.utter_max_rows
            for crange in self.merged_cells:
                rlo, rhi, clo, chi = crange
                if not (0 <= rlo < rhi <= umaxrows) \
                or not (0 <= clo < chi <= 256):
                    fprintf(self.logfile,
                        "*** WARNING: sheet #%d (%r), MERGEDCELLS bad range %r\n",
                        self.number, self.name, crange)
                if rhi > nr: nr = rhi
                if chi > nc: nc = chi
            self.extend_cells(nr, nc)
        if self.verbosity >= 1 \
        and (self.nrows != self._dimnrows or self.ncols != self._dimncols):
            fprintf(self.logfile,
                "NOTE *** sheet %d (%r): DIMENSIONS R,C = %d,%d should be %d,%d\n",
                self.number,
                self.name,
                self._dimnrows,
                self._dimncols,
                self.nrows,
                self.ncols,
                )
        if self._need_fix_ragged_rows:
            self.fix_ragged_rows()

    def put_cell(self, rowx, colx, ctype, value, xf_index):
        try:
            self._cell_types[rowx][colx] = ctype
            self._cell_values[rowx][colx] = value
            if self.formatting_info:
                self._cell_xf_indexes[rowx][colx] = xf_index
        except IndexError:
            # print >> self.logfile, "put_cell extending", rowx, colx
            self.extend_cells(rowx+1, colx+1)
            try:
                self._cell_types[rowx][colx] = ctype
                self._cell_values[rowx][colx] = value
                if self.formatting_info:
                    self._cell_xf_indexes[rowx][colx] = xf_index
            except:
                print >> self.logfile, "put_cell", rowx, colx
                raise
        except:
            print >> self.logfile, "put_cell", rowx, colx
            raise

    def put_blank_cell(self, rowx, colx, xf_index):
        # This is used for cells from BLANK and MULBLANK records
        ctype = XL_CELL_BLANK
        value = ''
        try:
            self._cell_types[rowx][colx] = ctype
            self._cell_values[rowx][colx] = value
            self._cell_xf_indexes[rowx][colx] = xf_index
        except IndexError:
            # print >> self.logfile, "put_cell extending", rowx, colx
            self.extend_cells(rowx+1, colx+1)
            try:
                self._cell_types[rowx][colx] = ctype
                self._cell_values[rowx][colx] = value
                self._cell_xf_indexes[rowx][colx] = xf_index
            except:
                print >> self.logfile, "put_cell", rowx, colx
                raise
        except:
            print >> self.logfile, "put_cell", rowx, colx
            raise

    def put_number_cell(self, rowx, colx, value, xf_index):
        ctype = self._xf_index_to_xl_type_map[xf_index]
        try:
            self._cell_types[rowx][colx] = ctype
            self._cell_values[rowx][colx] = value
            if self.formatting_info:
                self._cell_xf_indexes[rowx][colx] = xf_index
        except IndexError:
            # print >> self.logfile, "put_number_cell extending", rowx, colx
            self.extend_cells(rowx+1, colx+1)
            try:
                self._cell_types[rowx][colx] = ctype
                self._cell_values[rowx][colx] = value
                if self.formatting_info:
                    self._cell_xf_indexes[rowx][colx] = xf_index
            except:
                print >> self.logfile, "put_number_cell", rowx, colx
                raise
        except:
            print >> self.logfile, "put_number_cell", rowx, colx
            raise

    # === Methods after this line neither know nor care about how cells are stored.

    def read(self, bk):
        global rc_stats
        DEBUG = 0
        blah = DEBUG or self.verbosity >= 2
        blah_rows = DEBUG or self.verbosity >= 4
        blah_formulas = 0 and blah
        oldpos = bk._position
        bk.position(self._position)
        XL_SHRFMLA_ETC_ETC = (
            XL_SHRFMLA, XL_ARRAY, XL_TABLEOP, XL_TABLEOP2,
            XL_ARRAY2, XL_TABLEOP_B2,
            )
        self_put_number_cell = self.put_number_cell
        self_put_cell = self.put_cell
        self_put_blank_cell = self.put_blank_cell
        local_unpack = unpack
        bk_get_record_parts = bk.get_record_parts
        bv = self.biff_version
        fmt_info = self.formatting_info
        eof_found = 0
        while 1:
            # if DEBUG: print "SHEET.READ: about to read from position %d" % bk._position
            rc, data_len, data = bk_get_record_parts()
            # if rc in rc_stats:
            #     rc_stats[rc] += 1
            # else:
            #     rc_stats[rc] = 1
            # if DEBUG: print "SHEET.READ: op 0x%04x, %d bytes %r" % (rc, data_len, data)
            if rc == XL_NUMBER:
                rowx, colx, xf_index, d = local_unpack('<HHHd', data)
                # if xf_index == 0:
                #     fprintf(self.logfile,
                #         "NUMBER: r=%d c=%d xfx=%d %f\n", rowx, colx, xf_index, d)
                self_put_number_cell(rowx, colx, d, xf_index)
            elif rc == XL_LABELSST:
                rowx, colx, xf_index, sstindex = local_unpack('<HHHi', data)
                # print "LABELSST", rowx, colx, sstindex, bk._sharedstrings[sstindex]
                self_put_cell(rowx, colx, XL_CELL_TEXT, bk._sharedstrings[sstindex], xf_index)
            elif rc == XL_LABEL or rc == XL_RSTRING:
                # RSTRING has extra richtext info at the end, but we ignore it.
                rowx, colx, xf_index = local_unpack('<HHH', data[0:6])
                if bv < BIFF_FIRST_UNICODE:
                    strg = unpack_string(data, 6, bk.encoding, lenlen=2)
                else:
                    strg = unpack_unicode(data, 6, lenlen=2)
                self_put_cell(rowx, colx, XL_CELL_TEXT, strg, xf_index)
            elif rc == XL_RK:
                rowx, colx, xf_index = local_unpack('<HHH', data[:6])
                d = unpack_RK(data[6:10])
                self_put_number_cell(rowx, colx, d, xf_index)
            elif rc == XL_MULRK:
                mulrk_row, mulrk_first = local_unpack('<HH', data[0:4])
                mulrk_last, = local_unpack('<H', data[-2:])
                pos = 4
                for colx in xrange(mulrk_first, mulrk_last+1):
                    xf_index, = local_unpack('<H', data[pos:pos+2])
                    d = unpack_RK(data[pos+2:pos+6])
                    pos += 6
                    self_put_number_cell(mulrk_row, colx, d, xf_index)
            elif rc == XL_ROW:
                # Version 0.6.0a3: ROW records are just not worth using (for memory allocation).
                # Version 0.6.1: now used for formatting info.
                if not fmt_info: continue
                rowx, bits1, bits2 = local_unpack('<H4xH4xi', data[0:16])
                if not(0 <= rowx < self.utter_max_rows):
                    print >> self.logfile, \
                        "*** NOTE: ROW record has row index %d; " \
                        "should have 0 <= rowx < %d -- record ignored!" \
                        % (rowx, self.utter_max_rows)
                    continue
                r = Rowinfo()
                # Using upkbits() is far too slow on a file
                # with 30 sheets each with 10K rows :-(
                #    upkbits(r, bits1, (
                #        ( 0, 0x7FFF, 'height'),
                #        (15, 0x8000, 'has_default_height'),
                #        ))
                #    upkbits(r, bits2, (
                #        ( 0, 0x00000007, 'outline_level'),
                #        ( 4, 0x00000010, 'outline_group_starts_ends'),
                #        ( 5, 0x00000020, 'hidden'),
                #        ( 6, 0x00000040, 'height_mismatch'),
                #        ( 7, 0x00000080, 'has_default_xf_index'),
                #        (16, 0x0FFF0000, 'xf_index'),
                #        (28, 0x10000000, 'additional_space_above'),
                #        (29, 0x20000000, 'additional_space_below'),
                #        ))
                # So:
                r.height = bits1 & 0x7fff
                r.has_default_height = (bits1 >> 15) & 1
                r.outline_level = bits2 & 7
                r.outline_group_starts_ends = (bits2 >> 4) & 1
                r.hidden = (bits2 >> 5) & 1
                r.height_mismatch = (bits2 >> 6) & 1
                r.has_default_xf_index = (bits2 >> 7) & 1
                r.xf_index = (bits2 >> 16) & 0xfff
                r.additional_space_above = (bits2 >> 28) & 1
                r.additional_space_below = (bits2 >> 29) & 1
                if not r.has_default_xf_index:
                    r.xf_index = -1
                self.rowinfo_map[rowx] = r
                if 0 and r.xf_index > -1:
                    fprintf(self.logfile,
                        "**ROW %d %d %d\n",
                        self.number, rowx, r.xf_index)
                if blah_rows:
                    print >> self.logfile, 'ROW', rowx, bits1, bits2
                    r.dump(self.logfile,
                        header="--- sh #%d, rowx=%d ---" % (self.number, rowx))
            elif rc & 0xff == XL_FORMULA: # 06, 0206, 0406
                # DEBUG = 1
                # if DEBUG: print "FORMULA: rc: 0x%04x data: %r" % (rc, data)
                rowx, colx, xf_index, flags = local_unpack('<HHHxxxxxxxxH', data[0:16])
                if blah_formulas: # testing formula dumper
                    fprintf(self.logfile, "FORMULA: rowx=%d colx=%d\n", rowx, colx)
                    fmlalen = local_unpack("<H", data[20:22])[0]
                    decompile_formula(bk, data[22:], fmlalen,
                        reldelta=0, browx=rowx, bcolx=colx, blah=1)
                if data[12] == '\xff' and data[13] == '\xff':
                    if data[6] == '\x00':
                        # need to read next record (STRING)
                        gotstring = 0
                        # if flags & 8:
                        if 1: # "flags & 8" applies only to SHRFMLA
                            # actually there's an optional SHRFMLA or ARRAY etc record to skip over
                            rc2, data2_len, data2 = bk.get_record_parts()
                            if rc2 == XL_STRING:
                                gotstring = 1
                            elif rc2 == XL_ARRAY:
                                row1x, rownx, col1x, colnx, array_flags, tokslen = \
                                    local_unpack("<HHBBBxxxxxH", data2[:14])
                                if blah_formulas:
                                    fprintf(self.logfile, "ARRAY: %d %d %d %d %d\n",
                                        row1x, rownx, col1x, colnx, array_flags)
                                    dump_formula(bk, data2[14:], tokslen, bv, reldelta=0, blah=1)
                            elif rc2 == XL_SHRFMLA:
                                row1x, rownx, col1x, colnx, nfmlas, tokslen = \
                                    local_unpack("<HHBBxBH", data2[:10])
                                if blah_formulas:
                                    fprintf(self.logfile, "SHRFMLA (sub): %d %d %d %d %d\n",
                                        row1x, rownx, col1x, colnx, nfmlas)
                                    decompile_formula(bk, data2[10:], tokslen, reldelta=1, blah=1)
                            elif rc2 not in XL_SHRFMLA_ETC_ETC:
                                raise XLRDError(
                                    "Expected SHRFMLA, ARRAY, TABLEOP* or STRING record; found 0x%04x" % rc2)
                            # if DEBUG: print "gotstring:", gotstring
                        # now for the STRING record
                        if not gotstring:
                            rc2, _unused_len, data2 = bk.get_record_parts()
                            if rc2 != XL_STRING: raise XLRDError("Expected STRING record; found 0x%04x" % rc2)
                        # if DEBUG: print "STRING: data=%r BIFF=%d cp=%d" % (data2, self.biff_version, bk.encoding)
                        if self.biff_version < BIFF_FIRST_UNICODE:
                            strg = unpack_string(data2, 0, bk.encoding, lenlen=2)
                        else:
                            strg = unpack_unicode(data2, 0, lenlen=2)
                        self.put_cell(rowx, colx, XL_CELL_TEXT, strg, xf_index)
                        # if DEBUG: print "FORMULA strg %r" % strg
                    elif data[6] == '\x01':
                        # boolean formula result
                        value = ord(data[8])
                        self.put_cell(rowx, colx, XL_CELL_BOOLEAN, value, xf_index)
                    elif data[6] == '\x02':
                        # Error in cell
                        value = ord(data[8])
                        self.put_cell(rowx, colx, XL_CELL_ERROR, value, xf_index)
                    elif data[6] == '\x03':
                        # empty ... i.e. empty (zero-length) string, NOT an empty cell.
                        self.put_cell(rowx, colx, XL_CELL_TEXT, u"", xf_index)
                    else:
                        raise XLRDError("unexpected special case (0x%02x) in FORMULA" % ord(data[6]))
                else:
                    # it is a number
                    d = local_unpack('<d', data[6:14])[0]
                    self_put_number_cell(rowx, colx, d, xf_index)
            elif rc == XL_BOOLERR:
                rowx, colx, xf_index, value, is_err = local_unpack('<HHHBB', data[:8])
                # Note OOo Calc 2.0 writes 9-byte BOOLERR records.
                # OOo docs say 8. Excel writes 8.
                cellty = (XL_CELL_BOOLEAN, XL_CELL_ERROR)[is_err]
                # if DEBUG: print "XL_BOOLERR", rowx, colx, xf_index, value, is_err
                self.put_cell(rowx, colx, cellty, value, xf_index)
            elif rc == XL_COLINFO:
                if not fmt_info: continue
                c = Colinfo()
                first_colx, last_colx, c.width, c.xf_index, flags \
                    = local_unpack("<HHHHH", data[:10])
                #### Colinfo.width is denominated in 256ths of a character, 
                #### *not* in characters. 
                if not(0 <= first_colx <= last_colx <= 256):
                    # Note: 256 instead of 255 is a common mistake.
                    # We silently ignore the non-existing 257th column in that case.
                    print >> self.logfile, \
                        "*** NOTE: COLINFO record has first col index %d, last %d; " \
                        "should have 0 <= first <= last <= 255 -- record ignored!" \
                        % (first_colx, last_colx)
                    del c
                    continue
                upkbits(c, flags, (
                    ( 0, 0x0001, 'hidden'),
                    ( 1, 0x0002, 'bit1_flag'),
                    # *ALL* colinfos created by Excel in "default" cases are 0x0002!!
                    # Maybe it's "locked" by analogy with XFProtection data.
                    ( 8, 0x0700, 'outline_level'),
                    (12, 0x1000, 'collapsed'),
                    ))
                for colx in xrange(first_colx, last_colx+1):
                    if colx > 255: break # Excel does 0 to 256 inclusive
                    self.colinfo_map[colx] = c
                    if 0:
                        fprintf(self.logfile,
                            "**COL %d %d %d\n",
                            self.number, colx, c.xf_index)
                if blah:
                    fprintf(
                        self.logfile,
                        "COLINFO sheet #%d cols %d-%d: wid=%d xf_index=%d flags=0x%04x\n",
                        self.number, first_colx, last_colx, c.width, c.xf_index, flags,
                        )
                    c.dump(self.logfile, header='===')
            elif rc == XL_DEFCOLWIDTH:
                self.defcolwidth, = local_unpack("<H", data[:2])
                if 0: print >> self.logfile, 'DEFCOLWIDTH', self.defcolwidth
            elif rc == XL_STANDARDWIDTH:
                if data_len != 2:
                    print >> self.logfile, '*** ERROR *** STANDARDWIDTH', data_len, repr(data)
                self.standardwidth, = local_unpack("<H", data[:2])
                if 0: print >> self.logfile, 'STANDARDWIDTH', self.standardwidth
            elif rc == XL_GCW:
                if not fmt_info: continue # useless w/o COLINFO
                assert data_len == 34
                assert data[0:2] == "\x20\x00"
                iguff = unpack("<8i", data[2:34])
                gcw = []
                for bits in iguff:
                    for j in xrange(32):
                        gcw.append(bits & 1)
                        bits >>= 1
                self.gcw = tuple(gcw)
                if 0:
                    showgcw = "".join(map(lambda x: "F "[x], gcw)).rstrip().replace(' ', '.')
                    print "GCW:", showgcw
            elif rc == XL_BLANK:
                if not fmt_info: continue
                rowx, colx, xf_index = local_unpack('<HHH', data[:6])
                if 0: print >> self.logfile, "BLANK", rowx, colx, xf_index
                self_put_blank_cell(rowx, colx, xf_index)
            elif rc == XL_MULBLANK: # 00BE
                if not fmt_info: continue
                mul_row, mul_first = local_unpack('<HH', data[0:4])
                mul_last, = local_unpack('<H', data[-2:])
                if 0:
                    print >> self.logfile, "MULBLANK", mul_row, mul_first, mul_last
                pos = 4
                for colx in xrange(mul_first, mul_last+1):
                    xf_index, = local_unpack('<H', data[pos:pos+2])
                    pos += 2
                    self_put_blank_cell(mul_row, colx, xf_index)
            elif rc == XL_DIMENSION or rc == XL_DIMENSION2:
                # if data_len == 10:
                # Was crashing on BIFF 4.0 file w/o the two trailing unused bytes.
                # Reported by Ralph Heimburger.
                if bv < 80:
                    dim_tuple = local_unpack('<HxxH', data[2:8])
                else:
                    dim_tuple = local_unpack('<ixxH', data[4:12])
                self.nrows, self.ncols = 0, 0
                self._dimnrows, self._dimncols = dim_tuple
                if not self.book._xf_epilogue_done:
                    # Needed for bv <= 40
                    self.book.xf_epilogue()
                if blah:
                    fprintf(self.logfile,
                        "sheet %d(%r) DIMENSIONS: ncols=%d nrows=%d\n",
                        self.number, self.name, self._dimncols, self._dimnrows
                        )
            elif rc == XL_EOF:
                DEBUG = 0
                if DEBUG: print >> self.logfile, "SHEET.READ: EOF"
                eof_found = 1
                break
            elif rc == XL_OBJ:
                bk.handle_obj(data)
            elif rc in bofcodes: ##### EMBEDDED BOF #####
                version, boftype = local_unpack('<HH', data[0:4])
                if boftype != 0x20: # embedded chart
                    print >> self.logfile, \
                        "*** Unexpected embedded BOF (0x%04x) at offset %d: version=0x%04x type=0x%04x" \
                        % (rc, bk._position - data_len - 4, version, boftype)
                while 1:
                    code, data_len, data = bk.get_record_parts()
                    if code == XL_EOF:
                        break
                if DEBUG: print >> self.logfile, "---> found EOF"
            elif rc == XL_COUNTRY:
                bk.handle_country(data)
            elif rc == XL_LABELRANGES:
                pos = 0
                pos = unpack_cell_range_address_list_update_pos(
                        self.row_label_ranges, data, pos, bv, addr_size=8,
                        )
                pos = unpack_cell_range_address_list_update_pos(
                        self.col_label_ranges, data, pos, bv, addr_size=8,
                        )
                assert pos == data_len
            elif rc == XL_ARRAY:
                row1x, rownx, col1x, colnx, array_flags, tokslen = \
                    local_unpack("<HHBBBxxxxxH", data[:14])
                if blah_formulas:
                    print "ARRAY:", row1x, rownx, col1x, colnx, array_flags
                    dump_formula(bk, data[14:], tokslen, bv, reldelta=0, blah=1)
            elif rc == XL_SHRFMLA:
                row1x, rownx, col1x, colnx, nfmlas, tokslen = \
                    local_unpack("<HHBBxBH", data[:10])
                if blah_formulas:
                    print "SHRFMLA (main):", row1x, rownx, col1x, colnx, nfmlas
                    decompile_formula(bk, data[10:], tokslen, reldelta=0, blah=1)
            elif rc == XL_CONDFMT:
                if not fmt_info: continue
                assert bv >= 80
                num_CFs, needs_recalc, browx1, browx2, bcolx1, bcolx2 = \
                    unpack("<6H", data[0:12])
                if self.verbosity >= 1:
                    fprintf(self.logfile,
                        "\n*** WARNING: Ignoring CONDFMT (conditional formatting) record\n" \
                        "*** in Sheet %d (%r).\n" \
                        "*** %d CF record(s); needs_recalc_or_redraw = %d\n" \
                        "*** Bounding box is %s\n",
                        self.number, self.name, num_CFs, needs_recalc,
                        rangename2d(browx1, browx2+1, bcolx1, bcolx2+1),
                        )
                olist = [] # updated by the function
                pos = unpack_cell_range_address_list_update_pos(
                    olist, data, 12, bv, addr_size=8)
                # print >> self.logfile, repr(result), len(result)
                if self.verbosity >= 1:
                    fprintf(self.logfile,
                        "*** %d individual range(s):\n" \
                        "*** %s\n",
                        len(olist),
                        ", ".join([rangename2d(*coords) for coords in olist]),
                        )
            elif rc == XL_CF:
                if not fmt_info: continue
                cf_type, cmp_op, sz1, sz2, flags = unpack("<BBHHi", data[0:10])
                font_block = (flags >> 26) & 1
                bord_block = (flags >> 28) & 1
                patt_block = (flags >> 29) & 1
                if self.verbosity >= 1:
                    fprintf(self.logfile,
                        "\n*** WARNING: Ignoring CF (conditional formatting) sub-record.\n" \
                        "*** cf_type=%d, cmp_op=%d, sz1=%d, sz2=%d, flags=0x%08x\n" \
                        "*** optional data blocks: font=%d, border=%d, pattern=%d\n",
                        cf_type, cmp_op, sz1, sz2, flags,
                        font_block, bord_block, patt_block,
                        )
                # hex_char_dump(data, 0, data_len)
                pos = 12
                if font_block:
                    (font_height, font_options, weight, escapement, underline,
                    font_colour_index, two_bits, font_esc, font_underl) = \
                    unpack("<64x i i H H B 3x i 4x i i i 18x", data[pos:pos+118])
                    font_style = (two_bits > 1) & 1
                    posture = (font_options > 1) & 1
                    font_canc = (two_bits > 7) & 1
                    cancellation = (font_options > 7) & 1
                    if self.verbosity >= 1:
                        fprintf(self.logfile,
                            "*** Font info: height=%d, weight=%d, escapement=%d,\n" \
                            "*** underline=%d, colour_index=%d, esc=%d, underl=%d,\n" \
                            "*** style=%d, posture=%d, canc=%d, cancellation=%d\n",
                            font_height, weight, escapement, underline,
                            font_colour_index, font_esc, font_underl,
                            font_style, posture, font_canc, cancellation,
                            )
                    pos += 118
                if bord_block:
                    pos += 8
                if patt_block:
                    pos += 4
                fmla1 = data[pos:pos+sz1]
                pos += sz1
                if blah and sz1:
                    fprintf(self.logfile,
                        "*** formula 1:\n",
                        )
                    dump_formula(bk, fmla1, sz1, bv, reldelta=0, blah=1)
                fmla2 = data[pos:pos+sz2]
                pos += sz2
                assert pos == data_len
                if blah and sz2:
                    fprintf(self.logfile,
                        "*** formula 2:\n",
                        )
                    dump_formula(bk, fmla2, sz2, bv, reldelta=0, blah=1)
            elif rc == XL_DEFAULTROWHEIGHT:
                if data_len == 4:
                    bits, self.default_row_height = unpack("<HH", data[:4])
                elif data_len == 2:
                    self.default_row_height, = unpack("<H", data)
                    bits = 0
                    fprintf(self.logfile,
                        "*** WARNING: DEFAULTROWHEIGHT record len is 2, " \
                        "should be 4; assuming BIFF2 format\n")
                else:
                    bits = 0
                    fprintf(self.logfile,
                        "*** WARNING: DEFAULTROWHEIGHT record len is %d, " \
                        "should be 4; ignoring this record\n",
                        data_len)
                self.default_row_height_mismatch = bits & 1
                self.default_row_hidden = (bits >> 1) & 1
                self.default_additional_space_above = (bits >> 2) & 1
                self.default_additional_space_below = (bits >> 3) & 1
            elif rc == XL_MERGEDCELLS:
                if not fmt_info: continue
                pos = unpack_cell_range_address_list_update_pos(
                    self.merged_cells, data, 0, bv, addr_size=8)
                if blah:
                    fprintf(self.logfile,
                        "MERGEDCELLS: %d ranges\n", int_floor_div(pos - 2, 8))
                assert pos == data_len, \
                    "MERGEDCELLS: pos=%d data_len=%d" % (pos, data_len)
            elif rc == XL_WINDOW2:
                if bv >= 80:
                    (options,
                    self.first_visible_rowx, self.first_visible_colx,
                    self.gridline_colour_index,
                    self.cached_page_break_preview_mag_factor,
                    self.cached_normal_view_mag_factor
                    ) = unpack("<HHHHxxHH", data[:14])
                else: # BIFF3-7
                    (options,
                    self.first_visible_rowx, self.first_visible_colx,
                    ) = unpack("<HHH", data[:6])
                    self.gridline_colour_rgb = unpack("<BBB", data[6:9])
                    self.gridline_colour_index = \
                        nearest_colour_index(
                            self.book.colour_map,
                            self.gridline_colour_rgb,
                            debug=0)
                    self.cached_page_break_preview_mag_factor = 0 # default (60%)
                    self.cached_normal_view_mag_factor = 0 # default (100%)
                # options -- Bit, Mask, Contents:
                # 0 0001H 0 = Show formula results 1 = Show formulas
                # 1 0002H 0 = Do not show grid lines 1 = Show grid lines
                # 2 0004H 0 = Do not show sheet headers 1 = Show sheet headers
                # 3 0008H 0 = Panes are not frozen 1 = Panes are frozen (freeze)
                # 4 0010H 0 = Show zero values as empty cells 1 = Show zero values
                # 5 0020H 0 = Manual grid line colour 1 = Automatic grid line colour
                # 6 0040H 0 = Columns from left to right 1 = Columns from right to left
                # 7 0080H 0 = Do not show outline symbols 1 = Show outline symbols
                # 8 0100H 0 = Keep splits if pane freeze is removed 1 = Remove splits if pane freeze is removed
                # 9 0200H 0 = Sheet not selected 1 = Sheet selected (BIFF5-BIFF8)
                # 10 0400H 0 = Sheet not visible 1 = Sheet visible (BIFF5-BIFF8)
                # 11 0800H 0 = Show in normal view 1 = Show in page break preview (BIFF8)
                # The freeze flag specifies, if a following PANE record (6.71) describes unfrozen or frozen panes.                    
                for attr, _unused_defval in _WINDOW2_options:
                    setattr(self, attr, options & 1)
                    options >>= 1
                # print "WINDOW2: visible=%d selected=%d" \
                #     % (self.sheet_visible, self.sheet_selected)
            #### all of the following are for BIFF <= 4W
            elif bv <= 45:
                if rc == XL_FORMAT or rc == XL_FORMAT2:
                    bk.handle_format(data)
                elif rc == XL_FONT or rc == XL_FONT_B3B4:
                    bk.handle_font(data)
                elif rc == XL_STYLE:
                    bk.handle_style(data)
                elif rc == XL_PALETTE:
                    bk.handle_palette(data)
                elif rc == XL_BUILTINFMTCOUNT:
                    bk.handle_builtinfmtcount(data)
                elif rc == XL_XF4 or rc == XL_XF3: #### N.B. not XL_XF
                    bk.handle_xf(data)
                elif rc == XL_DATEMODE:
                    bk.handle_datemode(data)
                elif rc == XL_CODEPAGE:
                    bk.handle_codepage(data)
                elif rc == XL_FILEPASS:
                    bk.handle_filepass(data)
                elif rc == XL_WRITEACCESS:
                    bk.handle_writeaccess(data)
            else:
                # if DEBUG: print "SHEET.READ: Unhandled record type %02x %d bytes %r" % (rc, data_len, data)
                pass
        if not eof_found:
            raise XLRDError("Sheet %d (%r) missing EOF record" \
                % (self.number, self.name))
        self.tidy_dimensions()
        bk.position(oldpos)
        return 1

    def req_fmt_info(self):
        if not self.formatting_info:
            raise XLRDError("Feature requires open_workbook(..., formatting_info=True)")

    ##
    # Determine column display width.
    # <br /> -- New in version 0.6.1
    # <br />
    # @param colx Index of the queried column, range 0 to 255.
    # Note that it is possible to find out the width that will be used to display
    # columns with no cell information e.g. column IV (colx=255).
    # @return The column width that will be used for displaying
    # the given column by Excel, in units of 1/256th of the width of a 
    # standard character (the digit zero in the first font).
    
    def computed_column_width(self, colx):
        self.req_fmt_info()
        if self.biff_version >= 80:
            colinfo = self.colinfo_map.get(colx, None)
            if colinfo is not None:
                return colinfo.width
            if self.standardwidth is not None:
                return self.standardwidth
        elif self.biff_version >= 40:
            if self.gcw[colx]:
                if self.standardwidth is not None:
                    return self.standardwidth
            else:
                colinfo = self.colinfo_map.get(colx, None)
                if colinfo is not None:
                    return colinfo.width
        elif self.biff_version == 30:
            colinfo = self.colinfo_map.get(colx, None)
            if colinfo is not None:
                return colinfo.width
        # All roads lead to Rome and the DEFCOLWIDTH ...
        if self.defcolwidth is not None:
            return self.defcolwidth * 256
        return 8 * 256 # 8 is what Excel puts in a DEFCOLWIDTH record
                
                

# === helpers ===

def unpack_RK(rk_str):
    flags = ord(rk_str[0])
    if flags & 2:
        # There's a SIGNED 30-bit integer in there!
        i,  = unpack('<i', rk_str)
        i >>= 2 # div by 4 to drop the 2 flag bits
        if flags & 1:
            return i / 100.0
        return float(i)
    else:
        # It's the most significant 30 bits of an IEEE 754 64-bit FP number
        d, = unpack('<d', '\0\0\0\0' + chr(flags & 252) + rk_str[1:4])
        if flags & 1:
            return d / 100.0
        return d

##### =============== Cell ======================================== #####

cellty_from_fmtty = {
    FNU: XL_CELL_NUMBER,
    FUN: XL_CELL_NUMBER,
    FGE: XL_CELL_NUMBER,
    FDT: XL_CELL_DATE,
    FTX: XL_CELL_NUMBER, # Yes, a number can be formatted as text.
    }

ctype_text = {
    XL_CELL_EMPTY: 'empty',
    XL_CELL_TEXT: 'text',
    XL_CELL_NUMBER: 'number',
    XL_CELL_DATE: 'xldate',
    XL_CELL_BOOLEAN: 'bool',
    XL_CELL_ERROR: 'error',
    }

##
# <p>Contains the data for one cell.</p>
#
# <p>WARNING: You don't call this class yourself. You access Cell objects
# via methods of the Sheet object(s) that you found in the Book object that
# was returned when you called xlrd.open_workbook("myfile.xls").</p>
# <p> Cell objects have three attributes: <i>ctype</i> is an int, <i>value</i>
# (which depends on <i>ctype</i>) and <i>xf_index</i>.
# If "formatting_info" is not enabled when the workbook is opened, xf_index will be None.
# The following table describes the types of cells and how their values
# are represented in Python.</p>
#
# <table border="1" cellpadding="7">
# <tr>
# <th>Type symbol</th>
# <th>Type number</th>
# <th>Python value</th>
# </tr>
# <tr>
# <td>XL_CELL_EMPTY</td>
# <td align="center">0</td>
# <td>empty string u''</td>
# </tr>
# <tr>
# <td>XL_CELL_TEXT</td>
# <td align="center">1</td>
# <td>a Unicode string</td>
# </tr>
# <tr>
# <td>XL_CELL_NUMBER</td>
# <td align="center">2</td>
# <td>float</td>
# </tr>
# <tr>
# <td>XL_CELL_DATE</td>
# <td align="center">3</td>
# <td>float</td>
# </tr>
# <tr>
# <td>XL_CELL_BOOLEAN</td>
# <td align="center">4</td>
# <td>int; 1 means TRUE, 0 means FALSE</td>
# </tr>
# <tr>
# <td>XL_CELL_ERROR</td>
# <td align="center">5</td>
# <td>int representing internal Excel codes; for a text representation,
# refer to the supplied dictionary error_text_from_code</td>
# </tr>
# <tr>
# <td>XL_CELL_BLANK</td>
# <td align="center">6</td>
# <td>empty string u''. Note: this type will appear only when
# open_workbook(..., formatting_info=True) is used.</td>
# </tr>
# </table>
#<p></p>

class Cell(BaseObject):

    __slots__ = ['ctype', 'value', 'xf_index']

    def __init__(self, ctype, value, xf_index=None):
        self.ctype = ctype
        self.value = value
        self.xf_index = xf_index

    def __repr__(self):
        if self.xf_index is None:
            return "%s:%r" % (ctype_text[self.ctype], self.value)
        else:
            return "%s:%r (XF:%r)" % (ctype_text[self.ctype], self.value, self.xf_index)

##
# There is one and only one instance of an empty cell -- it's a singleton. This is it.
# You may use a test like "acell is empty_cell".
empty_cell = Cell(XL_CELL_EMPTY, '')

##### =============== Colinfo and Rowinfo ============================== #####

##
# Width and default formatting information that applies to one or
# more columns in a sheet. Derived from COLINFO records.
#
# <p> Here is the default hierarchy for width, according to the OOo docs:
#
# <br />"""In BIFF3, if a COLINFO record is missing for a column,
# the width specified in the record DEFCOLWIDTH is used instead.
#
# <br />In BIFF4-BIFF7, the width set in this [COLINFO] record is only used,
# if the corresponding bit for this column is cleared in the GCW
# record, otherwise the column width set in the DEFCOLWIDTH record
# is used (the STANDARDWIDTH record is always ignored in this case [see footnote!]).
#
# <br />In BIFF8, if a COLINFO record is missing for a column,
# the width specified in the record STANDARDWIDTH is used.
# If this [STANDARDWIDTH] record is also missing,
# the column width of the record DEFCOLWIDTH is used instead."""
# <br />
#
# Footnote:  The docs on the GCW record say this:
# """<br />
# If a bit is set, the corresponding column uses the width set in the STANDARDWIDTH
# record. If a bit is cleared, the corresponding column uses the width set in the
# COLINFO record for this column.
# <br />If a bit is set, and the worksheet does not contain the STANDARDWIDTH record, or if
# the bit is cleared, and the worksheet does not contain the COLINFO record, the DEFCOLWIDTH
# record of the worksheet will be used instead.
# <br />"""<br />
# At the moment (2007-01-17) xlrd is going with the GCW version of the story.
# Reference to the source may be useful: see the computed_column_width(colx) method
# of the Sheet class.
# <br />-- New in version 0.6.1
# </p>

class Colinfo(BaseObject):
    ##
    # Width of the column in 1/256 of the width of the zero character,
    # using default font (first FONT record in the file).
    width = 0
    ##
    # XF index to be used for formatting empty cells.
    xf_index = -1
    ##
    # 1 = column is hidden
    hidden = 0
    ##
    # Value of a 1-bit flag whose purpose is unknown
    # but is often seen set to 1
    bit1_flag = 0
    ##
    # Outline level of the column, in range(7).
    # (0 = no outline)
    outline_level = 0
    ##
    # 1 = column is collapsed
    collapsed = 0

##
# Height and default formatting information that applies to a row in a sheet.
# Derived from ROW records.
# <br /> -- New in version 0.6.1

class Rowinfo(BaseObject):
    ##
    # Height of the row, in twips. One twip == 1/20 of a point
    height = 0
    ##
    # 0 = Row has custom height; 1 = Row has default height
    has_default_height = 0
    ##
    # Outline level of the row
    outline_level = 0
    ##
    # 1 = Outline group starts or ends here (depending on where the
    # outline buttons are located, see WSBOOL record [TODO ??]),
    # <i>and</i> is collapsed
    outline_group_starts_ends = 0
    ##
    # 1 = Row is hidden (manually, or by a filter or outline group)
    hidden = 0
    ##
    # 1 = Row height and default font height do not match
    height_mismatch = 0
    ##
    # 1 = the xf_index attribute is usable; 0 = ignore it
    has_default_xf_index = 0
    ##
    # Index to default XF record for empty cells in this row.
    # Don't use this if has_default_xf_index == 0.
    xf_index = -9999
    ##
    # This flag is set, if the upper border of at least one cell in this row
    # or if the lower border of at least one cell in the row above is
    # formatted with a thick line style. Thin and medium line styles are not
    # taken into account.
    additional_space_above = 0
    ##
    # This flag is set, if the lower border of at least one cell in this row
    # or if the upper border of at least one cell in the row below is
    # formatted with a medium or thick line style. Thin line styles are not
    # taken into account.
    additional_space_below = 0
