279 lines
9.0 KiB
Python
279 lines
9.0 KiB
Python
# encoding: utf-8
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"""lxml custom element classes for shape-tree-related XML elements."""
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from __future__ import absolute_import, division, print_function, unicode_literals
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from pptx.enum.shapes import MSO_CONNECTOR_TYPE
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from pptx.oxml import parse_xml
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from pptx.oxml.ns import nsdecls, qn
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from pptx.oxml.shapes.autoshape import CT_Shape
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from pptx.oxml.shapes.connector import CT_Connector
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from pptx.oxml.shapes.graphfrm import CT_GraphicalObjectFrame
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from pptx.oxml.shapes.picture import CT_Picture
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from pptx.oxml.shapes.shared import BaseShapeElement
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from pptx.oxml.xmlchemy import BaseOxmlElement, OneAndOnlyOne, ZeroOrOne
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from pptx.util import Emu
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class CT_GroupShape(BaseShapeElement):
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"""
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Used for the shape tree (``<p:spTree>``) element as well as the group
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shape (``<p:grpSp>``) element.
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"""
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nvGrpSpPr = OneAndOnlyOne("p:nvGrpSpPr")
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grpSpPr = OneAndOnlyOne("p:grpSpPr")
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_shape_tags = (
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qn("p:sp"),
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qn("p:grpSp"),
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qn("p:graphicFrame"),
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qn("p:cxnSp"),
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qn("p:pic"),
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qn("p:contentPart"),
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)
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def add_autoshape(self, id_, name, prst, x, y, cx, cy):
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"""
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Append a new ``<p:sp>`` shape to the group/shapetree having the
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properties specified in call.
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"""
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sp = CT_Shape.new_autoshape_sp(id_, name, prst, x, y, cx, cy)
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self.insert_element_before(sp, "p:extLst")
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return sp
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def add_cxnSp(self, id_, name, type_member, x, y, cx, cy, flipH, flipV):
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"""
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Append a new ``<p:cxnSp>`` shape to the group/shapetree having the
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properties specified in call.
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"""
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prst = MSO_CONNECTOR_TYPE.to_xml(type_member)
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cxnSp = CT_Connector.new_cxnSp(id_, name, prst, x, y, cx, cy, flipH, flipV)
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self.insert_element_before(cxnSp, "p:extLst")
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return cxnSp
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def add_freeform_sp(self, x, y, cx, cy):
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"""Append a new freeform `p:sp` with specified position and size."""
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shape_id = self._next_shape_id
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name = "Freeform %d" % (shape_id - 1,)
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sp = CT_Shape.new_freeform_sp(shape_id, name, x, y, cx, cy)
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self.insert_element_before(sp, "p:extLst")
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return sp
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def add_grpSp(self):
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"""Return `p:grpSp` element newly appended to this shape tree.
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The element contains no sub-shapes, is positioned at (0, 0), and has
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width and height of zero.
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"""
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shape_id = self._next_shape_id
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name = "Group %d" % (shape_id - 1,)
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grpSp = CT_GroupShape.new_grpSp(shape_id, name)
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self.insert_element_before(grpSp, "p:extLst")
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return grpSp
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def add_pic(self, id_, name, desc, rId, x, y, cx, cy):
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"""
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Append a ``<p:pic>`` shape to the group/shapetree having properties
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as specified in call.
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"""
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pic = CT_Picture.new_pic(id_, name, desc, rId, x, y, cx, cy)
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self.insert_element_before(pic, "p:extLst")
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return pic
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def add_placeholder(self, id_, name, ph_type, orient, sz, idx):
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"""
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Append a newly-created placeholder ``<p:sp>`` shape having the
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specified placeholder properties.
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"""
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sp = CT_Shape.new_placeholder_sp(id_, name, ph_type, orient, sz, idx)
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self.insert_element_before(sp, "p:extLst")
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return sp
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def add_table(self, id_, name, rows, cols, x, y, cx, cy):
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"""
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Append a ``<p:graphicFrame>`` shape containing a table as specified
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in call.
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"""
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graphicFrame = CT_GraphicalObjectFrame.new_table_graphicFrame(
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id_, name, rows, cols, x, y, cx, cy
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)
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self.insert_element_before(graphicFrame, "p:extLst")
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return graphicFrame
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def add_textbox(self, id_, name, x, y, cx, cy):
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"""
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Append a newly-created textbox ``<p:sp>`` shape having the specified
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position and size.
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"""
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sp = CT_Shape.new_textbox_sp(id_, name, x, y, cx, cy)
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self.insert_element_before(sp, "p:extLst")
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return sp
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@property
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def chExt(self):
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"""Descendent `p:grpSpPr/a:xfrm/a:chExt` element."""
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return self.grpSpPr.get_or_add_xfrm().get_or_add_chExt()
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@property
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def chOff(self):
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"""Descendent `p:grpSpPr/a:xfrm/a:chOff` element."""
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return self.grpSpPr.get_or_add_xfrm().get_or_add_chOff()
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def get_or_add_xfrm(self):
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"""
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Return the ``<a:xfrm>`` grandchild element, newly-added if not
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present.
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"""
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return self.grpSpPr.get_or_add_xfrm()
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def iter_ph_elms(self):
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"""
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Generate each placeholder shape child element in document order.
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"""
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for e in self.iter_shape_elms():
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if e.has_ph_elm:
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yield e
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def iter_shape_elms(self):
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"""
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Generate each child of this ``<p:spTree>`` element that corresponds
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to a shape, in the sequence they appear in the XML.
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"""
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for elm in self.iterchildren():
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if elm.tag in self._shape_tags:
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yield elm
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@property
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def max_shape_id(self):
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"""Maximum int value assigned as @id in this slide.
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This is generally a shape-id, but ids can be assigned to other
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objects so we just check all @id values anywhere in the document
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(XML id-values have document scope).
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In practice, its minimum value is 1 because the spTree element itself
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is always assigned id="1".
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"""
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id_str_lst = self.xpath("//@id")
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used_ids = [int(id_str) for id_str in id_str_lst if id_str.isdigit()]
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return max(used_ids) if used_ids else 0
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@classmethod
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def new_grpSp(cls, id_, name):
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"""Return new "loose" `p:grpSp` element having *id_* and *name*."""
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xml = (
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"<p:grpSp %s>\n"
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" <p:nvGrpSpPr>\n"
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' <p:cNvPr id="%%d" name="%%s"/>\n'
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" <p:cNvGrpSpPr/>\n"
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" <p:nvPr/>\n"
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" </p:nvGrpSpPr>\n"
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" <p:grpSpPr>\n"
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" <a:xfrm>\n"
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' <a:off x="0" y="0"/>\n'
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' <a:ext cx="0" cy="0"/>\n'
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' <a:chOff x="0" y="0"/>\n'
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' <a:chExt cx="0" cy="0"/>\n'
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" </a:xfrm>\n"
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" </p:grpSpPr>\n"
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"</p:grpSp>" % nsdecls("a", "p", "r")
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) % (id_, name)
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grpSp = parse_xml(xml)
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return grpSp
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def recalculate_extents(self):
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"""Adjust x, y, cx, and cy to incorporate all contained shapes.
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This would typically be called when a contained shape is added,
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removed, or its position or size updated.
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This method is recursive "upwards" since a change in a group shape
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can change the position and size of its containing group.
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"""
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if not self.tag == qn("p:grpSp"):
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return
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x, y, cx, cy = self._child_extents
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self.chOff.x = self.x = x
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self.chOff.y = self.y = y
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self.chExt.cx = self.cx = cx
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self.chExt.cy = self.cy = cy
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self.getparent().recalculate_extents()
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@property
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def xfrm(self):
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"""
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The ``<a:xfrm>`` grandchild element or |None| if not found
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"""
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return self.grpSpPr.xfrm
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@property
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def _child_extents(self):
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"""(x, y, cx, cy) tuple representing net position and size.
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The values are formed as a composite of the contained child shapes.
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"""
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child_shape_elms = list(self.iter_shape_elms())
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if not child_shape_elms:
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return Emu(0), Emu(0), Emu(0), Emu(0)
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min_x = min([xSp.x for xSp in child_shape_elms])
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min_y = min([xSp.y for xSp in child_shape_elms])
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max_x = max([(xSp.x + xSp.cx) for xSp in child_shape_elms])
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max_y = max([(xSp.y + xSp.cy) for xSp in child_shape_elms])
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x = min_x
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y = min_y
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cx = max_x - min_x
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cy = max_y - min_y
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return x, y, cx, cy
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@property
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def _next_shape_id(self):
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"""Return unique shape id suitable for use with a new shape element.
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The returned id is the next available positive integer drawing object
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id in shape tree, starting from 1 and making use of any gaps in
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numbering. In practice, the minimum id is 2 because the spTree
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element itself is always assigned id="1".
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"""
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id_str_lst = self.xpath("//@id")
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used_ids = [int(id_str) for id_str in id_str_lst if id_str.isdigit()]
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for n in range(1, len(used_ids) + 2):
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if n not in used_ids:
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return n
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class CT_GroupShapeNonVisual(BaseShapeElement):
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"""
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``<p:nvGrpSpPr>`` element.
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"""
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cNvPr = OneAndOnlyOne("p:cNvPr")
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class CT_GroupShapeProperties(BaseOxmlElement):
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"""p:grpSpPr element """
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_tag_seq = (
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"a:xfrm",
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"a:noFill",
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"a:solidFill",
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"a:gradFill",
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"a:blipFill",
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"a:pattFill",
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"a:grpFill",
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"a:effectLst",
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"a:effectDag",
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"a:scene3d",
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"a:extLst",
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)
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xfrm = ZeroOrOne("a:xfrm", successors=_tag_seq[1:])
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effectLst = ZeroOrOne("a:effectLst", successors=_tag_seq[8:])
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del _tag_seq
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