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/usr/share/pyshared/openpyxl/writer/drawings.py is in python-openpyxl 1.5.6-1.

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# coding=UTF-8

# Copyright (c) 2010-2011 openpyxl
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
# @license: http://www.opensource.org/licenses/mit-license.php
# @author: see AUTHORS file

from openpyxl.shared.xmltools import Element, SubElement, get_document_content


class DrawingWriter(object):
    """ one main drawing file per sheet """

    def __init__(self, sheet):
        self._sheet = sheet

    def write(self):
        """ write drawings for one sheet in one file """

        root = Element('xdr:wsDr',
            {'xmlns:xdr' : "http://schemas.openxmlformats.org/drawingml/2006/spreadsheetDrawing",
            'xmlns:a' : "http://schemas.openxmlformats.org/drawingml/2006/main"})

        for i, chart in enumerate(self._sheet._charts):

            drawing = chart.drawing

#            anchor = SubElement(root, 'xdr:twoCellAnchor')
#            (start_row, start_col), (end_row, end_col) = drawing.coordinates
#            # anchor coordinates
#            _from = SubElement(anchor, 'xdr:from')
#            x = SubElement(_from, 'xdr:col').text = str(start_col)
#            x = SubElement(_from, 'xdr:colOff').text = '0'
#            x = SubElement(_from, 'xdr:row').text = str(start_row)
#            x = SubElement(_from, 'xdr:rowOff').text = '0'

#            _to = SubElement(anchor, 'xdr:to')
#            x = SubElement(_to, 'xdr:col').text = str(end_col)
#            x = SubElement(_to, 'xdr:colOff').text = '0'
#            x = SubElement(_to, 'xdr:row').text = str(end_row)
#            x = SubElement(_to, 'xdr:rowOff').text = '0'

            # we only support absolute anchor atm (TODO: oneCellAnchor, twoCellAnchor
            x, y, w, h = drawing.get_emu_dimensions()
            anchor = SubElement(root, 'xdr:absoluteAnchor')
            SubElement(anchor, 'xdr:pos', {'x':str(x), 'y':str(y)})
            SubElement(anchor, 'xdr:ext', {'cx':str(w), 'cy':str(h)})

            # graph frame
            frame = SubElement(anchor, 'xdr:graphicFrame', {'macro':''})

            name = SubElement(frame, 'xdr:nvGraphicFramePr')
            SubElement(name, 'xdr:cNvPr', {'id':'%s' % i, 'name':'Graphique %s' % i})
            SubElement(name, 'xdr:cNvGraphicFramePr')

            frm = SubElement(frame, 'xdr:xfrm')
            # no transformation
            SubElement(frm, 'a:off', {'x':'0', 'y':'0'})
            SubElement(frm, 'a:ext', {'cx':'0', 'cy':'0'})

            graph = SubElement(frame, 'a:graphic')
            data = SubElement(graph, 'a:graphicData',
                {'uri':'http://schemas.openxmlformats.org/drawingml/2006/chart'})
            SubElement(data, 'c:chart',
                {   'xmlns:c':'http://schemas.openxmlformats.org/drawingml/2006/chart',
                    'xmlns:r':'http://schemas.openxmlformats.org/officeDocument/2006/relationships',
                    'r:id':'rId%s' % (i + 1)})

            SubElement(anchor, 'xdr:clientData')

        return get_document_content(root)

    def write_rels(self, chart_id):

        root = Element('Relationships',
            {'xmlns' : 'http://schemas.openxmlformats.org/package/2006/relationships'})
        for i, chart in enumerate(self._sheet._charts):
            attrs = {'Id' : 'rId%s' % (i + 1),
                'Type' : 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/chart',
                'Target' : '../charts/chart%s.xml' % (chart_id + i) }
            SubElement(root, 'Relationship', attrs)
        return get_document_content(root)

class ShapeWriter(object):
    """ one file per shape """

    schema = "http://schemas.openxmlformats.org/drawingml/2006/main"

    def __init__(self, shapes):

        self._shapes = shapes

    def write(self, shape_id):

        root = Element('c:userShapes', {'xmlns:c' : 'http://schemas.openxmlformats.org/drawingml/2006/chart'})

        for shape in self._shapes:
            anchor = SubElement(root, 'cdr:relSizeAnchor',
                {'xmlns:cdr' : "http://schemas.openxmlformats.org/drawingml/2006/chartDrawing"})

            xstart, ystart, xend, yend = shape.get_coordinates()

            _from = SubElement(anchor, 'cdr:from')
            SubElement(_from, 'cdr:x').text = str(xstart)
            SubElement(_from, 'cdr:y').text = str(ystart)

            _to = SubElement(anchor, 'cdr:to')
            SubElement(_to, 'cdr:x').text = str(xend)
            SubElement(_to, 'cdr:y').text = str(yend)

            sp = SubElement(anchor, 'cdr:sp', {'macro':'', 'textlink':''})
            nvspr = SubElement(sp, 'cdr:nvSpPr')
            SubElement(nvspr, 'cdr:cNvPr', {'id':str(shape_id), 'name':'shape %s' % shape_id})
            SubElement(nvspr, 'cdr:cNvSpPr')

            sppr = SubElement(sp, 'cdr:spPr')
            frm = SubElement(sppr, 'a:xfrm', {'xmlns:a':self.schema})
            # no transformation
            SubElement(frm, 'a:off', {'x':'0', 'y':'0'})
            SubElement(frm, 'a:ext', {'cx':'0', 'cy':'0'})

            prstgeom = SubElement(sppr, 'a:prstGeom', {'xmlns:a':self.schema, 'prst':str(shape.style)})
            SubElement(prstgeom, 'a:avLst')

            fill = SubElement(sppr, 'a:solidFill', {'xmlns:a':self.schema})
            SubElement(fill, 'a:srgbClr', {'val':shape.color})

            border = SubElement(sppr, 'a:ln', {'xmlns:a':self.schema, 'w':str(shape._border_width)})
            sf = SubElement(border, 'a:solidFill')
            SubElement(sf, 'a:srgbClr', {'val':shape.border_color})

            self._write_style(sp)
            self._write_text(sp, shape)

            shape_id += 1

        return get_document_content(root)

    def _write_text(self, node, shape):
        """ write text in the shape """

        tx_body = SubElement(node, 'cdr:txBody')
        SubElement(tx_body, 'a:bodyPr', {'xmlns:a':self.schema, 'vertOverflow':'clip'})
        SubElement(tx_body, 'a:lstStyle',
            {'xmlns:a':self.schema})
        p = SubElement(tx_body, 'a:p', {'xmlns:a':self.schema})
        if shape.text:
            r = SubElement(p, 'a:r')
            rpr = SubElement(r, 'a:rPr', {'lang':'en-US'})
            fill = SubElement(rpr, 'a:solidFill')
            SubElement(fill, 'a:srgbClr', {'val':shape.text_color})

            SubElement(r, 'a:t').text = shape.text
        else:
            SubElement(p, 'a:endParaRPr', {'lang':'en-US'})

    def _write_style(self, node):
        """ write style theme """

        style = SubElement(node, 'cdr:style')

        ln_ref = SubElement(style, 'a:lnRef', {'xmlns:a':self.schema, 'idx':'2'})
        scheme_clr = SubElement(ln_ref, 'a:schemeClr', {'val':'accent1'})
        SubElement(scheme_clr, 'a:shade', {'val':'50000'})

        fill_ref = SubElement(style, 'a:fillRef', {'xmlns:a':self.schema, 'idx':'1'})
        SubElement(fill_ref, 'a:schemeClr', {'val':'accent1'})

        effect_ref = SubElement(style, 'a:effectRef', {'xmlns:a':self.schema, 'idx':'0'})
        SubElement(effect_ref, 'a:schemeClr', {'val':'accent1'})

        font_ref = SubElement(style, 'a:fontRef', {'xmlns:a':self.schema, 'idx':'minor'})
        SubElement(font_ref, 'a:schemeClr', {'val':'lt1'})