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|
Font
====
Word supports a rich variety of character formatting. Character formatting
can be applied at various levels in the *style hierarchy*. At the lowest
level, it can be applied directly to a run of text content. Above that, it
can be applied to character, paragraph and table styles. It can also be
applied to an abstract numbering definition. At the highest levels it can be
applied via a theme or document defaults.
Typeface name
-------------
Word allows multiple typefaces to be specified for character content in
a single run. This allows different Unicode character ranges such as ASCII
and Arabic to be used in a single run, each being rendered in the typeface
specified for that range.
Up to eight distinct typefaces may be specified for a font. Four are used to
specify a typeface for a distinct code point range. These are:
* `w:ascii` - used for the first 128 Unicode code points
* `w:cs` - used for complex script code points
* `w:eastAsia` - used for East Asian code points
* `w:hAnsi` - standing for *high ANSI*, but effectively the catch-all for any
code points not specified by one of the other three.
The other four, `w:asciiTheme`, `w:csTheme`, `w:eastAsiaTheme`, and
`w:hAnsiTheme` are used to indirectly specify a theme-defined font. This
allows the typeface to be set centrally in the document. These four attributes
have lower precedence than the first four, so for example the value of
`w:asciiTheme` is ignored if a `w:ascii` attribute is also present.
The typeface name used for a run is specified in the `w:rPr/w:rFonts`
element. There are 8 attributes that in combination specify the typeface to
be used.
Protocol
~~~~~~~~
Initially, only the base typeface name is supported by the API, using the
:attr:`~.Font.name` property. Its value is the that of the `w:rFonts/@w:ascii`
attribute or |None| if not present. Assignment to this property sets both the
`w:ascii` and the `w:hAnsi` attribute to the assigned string or removes them
both if |None| is assigned::
>>> font = document.styles['Normal'].font
>>> font.name
None
>>> font.name = 'Arial'
>>> font.name
'Arial'
Boolean run properties
----------------------
Character formatting that is either on or off, such as bold, italic, and
small caps. Certain of these properties are *toggle properties* that may
cancel each other out if they appear more than once in the style hierarchy.
See §17.7.3 for more details on toggle properties. They don't affect the API
specified here.
The following run properties are boolean (tri-state) properties:
+-----------------+------------+-------------------------------------------+
| element | spec | name |
+=================+============+===========================================+
| `<b/>` | §17.3.2.1 | Bold |
+-----------------+------------+-------------------------------------------+
| `<bCs/>` | §17.3.2.2 | Complex Script Bold |
+-----------------+------------+-------------------------------------------+
| `<caps/>` | §17.3.2.5 | Display All Characters as Capital Letters |
+-----------------+------------+-------------------------------------------+
| `<cs/>` | §17.3.2.7 | Use Complex Script Formatting on Run |
+-----------------+------------+-------------------------------------------+
| `<dstrike/>` | §17.3.2.9 | Double Strikethrough |
+-----------------+------------+-------------------------------------------+
| `<emboss/>` | §17.3.2.13 | Embossing |
+-----------------+------------+-------------------------------------------+
| `<i/>` | §17.3.2.16 | Italics |
+-----------------+------------+-------------------------------------------+
| `<iCs/>` | §17.3.2.17 | Complex Script Italics |
+-----------------+------------+-------------------------------------------+
| `<imprint/>` | §17.3.2.18 | Imprinting |
+-----------------+------------+-------------------------------------------+
| `<noProof/>` | §17.3.2.21 | Do Not Check Spelling or Grammar |
+-----------------+------------+-------------------------------------------+
| `<oMath/>` | §17.3.2.22 | Office Open XML Math |
+-----------------+------------+-------------------------------------------+
| `<outline/>` | §17.3.2.23 | Display Character Outline |
+-----------------+------------+-------------------------------------------+
| `<rtl/>` | §17.3.2.30 | Right To Left Text |
+-----------------+------------+-------------------------------------------+
| `<shadow/>` | §17.3.2.31 | Shadow |
+-----------------+------------+-------------------------------------------+
| `<smallCaps/>` | §17.3.2.33 | Small Caps |
+-----------------+------------+-------------------------------------------+
| `<snapToGrid/>` | §17.3.2.34 | Use Document Grid Settings For Inter- |
| | | Character Spacing |
+-----------------+------------+-------------------------------------------+
| `<specVanish/>` | §17.3.2.36 | Paragraph Mark is Always Hidden |
+-----------------+------------+-------------------------------------------+
| `<strike/>` | §17.3.2.37 | Single Strikethrough |
+-----------------+------------+-------------------------------------------+
| `<vanish/>` | §17.3.2.41 | Hidden Text |
+-----------------+------------+-------------------------------------------+
| `<webHidden/>` | §17.3.2.44 | Web Hidden Text |
+-----------------+------------+-------------------------------------------+
Protocol
--------
At the API level, each of the boolean run properties is a read/write
'tri-state' property, having the possible values |True|, |False|, and |None|.
The following interactive session demonstrates the protocol for querying and
applying run-level properties::
>>> run = p.add_run()
>>> run.bold
None
>>> run.bold = True
>>> run.bold
True
>>> run.bold = False
>>> run.bold
False
>>> run.bold = None
>>> run.bold
None
The semantics of the three values are as follows:
+-------+---------------------------------------------------------------+
| value | meaning |
+=======+===============================================================+
| True | The effective value of the property is unconditionally `on`. |
| | Contrary settings in the style hierarchy have no effect. |
+-------+---------------------------------------------------------------+
| False | The effective value of the property is unconditionally `off`. |
| | Contrary settings in the style hierarchy have no effect. |
+-------+---------------------------------------------------------------+
| None | The element is not present. The effective value is |
| | inherited from the style hierarchy. If no value for this |
| | property is present in the style hierarchy, the effective |
| | value is `off`. |
+-------+---------------------------------------------------------------+
Toggle properties
-----------------
Certain of the boolean run properties are *toggle properties*. A toggle
property is one that behaves like a `toggle` at certain places in the style
hierarchy. Toggle here means that setting the property on has the effect of
reversing the prior setting rather than unconditionally setting the property
on.
This behavior allows these properties to be overridden (turned off) in
inheriting styles. For example, consider a character style `emphasized` that
sets bold on. Another style, `strong` inherits from `emphasized`, but should
display in italic rather than bold. Setting bold off has no effect because it
is overridden by the bold in `strong` (I think). Because bold is a toggle
property, setting bold on in `emphasized` causes its value to be toggled, to
False, achieving the desired effect. See §17.7.3 for more details on toggle
properties.
The following run properties are toggle properties:
+----------------+------------+-------------------------------------------+
| element | spec | name |
+================+============+===========================================+
| `<b/>` | §17.3.2.1 | Bold |
+----------------+------------+-------------------------------------------+
| `<bCs/>` | §17.3.2.2 | Complex Script Bold |
+----------------+------------+-------------------------------------------+
| `<caps/>` | §17.3.2.5 | Display All Characters as Capital Letters |
+----------------+------------+-------------------------------------------+
| `<emboss/>` | §17.3.2.13 | Embossing |
+----------------+------------+-------------------------------------------+
| `<i/>` | §17.3.2.16 | Italics |
+----------------+------------+-------------------------------------------+
| `<iCs/>` | §17.3.2.17 | Complex Script Italics |
+----------------+------------+-------------------------------------------+
| `<imprint/>` | §17.3.2.18 | Imprinting |
+----------------+------------+-------------------------------------------+
| `<outline/>` | §17.3.2.23 | Display Character Outline |
+----------------+------------+-------------------------------------------+
| `<shadow/>` | §17.3.2.31 | Shadow |
+----------------+------------+-------------------------------------------+
| `<smallCaps/>` | §17.3.2.33 | Small Caps |
+----------------+------------+-------------------------------------------+
| `<strike/>` | §17.3.2.37 | Single Strikethrough |
+----------------+------------+-------------------------------------------+
| `<vanish/>` | §17.3.2.41 | Hidden Text |
+----------------+------------+-------------------------------------------+
Specimen XML
------------
.. highlight:: xml
::
<w:r>
<w:rPr>
<w:b/>
<w:i/>
<w:smallCaps/>
<w:strike/>
<w:sz w:val="28"/>
<w:szCs w:val="28"/>
<w:u w:val="single"/>
</w:rPr>
<w:t>bold, italic, small caps, strike, 14 pt, and underline</w:t>
</w:r>
Schema excerpt
--------------
.. highlight:: xml
It appears the run properties may appear in any order and may appear multiple
times each. Not sure what the semantics of that would be or why one would
want to do it, but something to note. Word seems to place them in the order
below when it writes the file.::
<xsd:complexType name="CT_RPr"> <!-- denormalized -->
<xsd:sequence>
<xsd:choice minOccurs="0" maxOccurs="unbounded"/>
<xsd:element name="rStyle" type="CT_String"/>
<xsd:element name="rFonts" type="CT_Fonts"/>
<xsd:element name="b" type="CT_OnOff"/>
<xsd:element name="bCs" type="CT_OnOff"/>
<xsd:element name="i" type="CT_OnOff"/>
<xsd:element name="iCs" type="CT_OnOff"/>
<xsd:element name="caps" type="CT_OnOff"/>
<xsd:element name="smallCaps" type="CT_OnOff"/>
<xsd:element name="strike" type="CT_OnOff"/>
<xsd:element name="dstrike" type="CT_OnOff"/>
<xsd:element name="outline" type="CT_OnOff"/>
<xsd:element name="shadow" type="CT_OnOff"/>
<xsd:element name="emboss" type="CT_OnOff"/>
<xsd:element name="imprint" type="CT_OnOff"/>
<xsd:element name="noProof" type="CT_OnOff"/>
<xsd:element name="snapToGrid" type="CT_OnOff"/>
<xsd:element name="vanish" type="CT_OnOff"/>
<xsd:element name="webHidden" type="CT_OnOff"/>
<xsd:element name="color" type="CT_Color"/>
<xsd:element name="spacing" type="CT_SignedTwipsMeasure"/>
<xsd:element name="w" type="CT_TextScale"/>
<xsd:element name="kern" type="CT_HpsMeasure"/>
<xsd:element name="position" type="CT_SignedHpsMeasure"/>
<xsd:element name="sz" type="CT_HpsMeasure"/>
<xsd:element name="szCs" type="CT_HpsMeasure"/>
<xsd:element name="highlight" type="CT_Highlight"/>
<xsd:element name="u" type="CT_Underline"/>
<xsd:element name="effect" type="CT_TextEffect"/>
<xsd:element name="bdr" type="CT_Border"/>
<xsd:element name="shd" type="CT_Shd"/>
<xsd:element name="fitText" type="CT_FitText"/>
<xsd:element name="vertAlign" type="CT_VerticalAlignRun"/>
<xsd:element name="rtl" type="CT_OnOff"/>
<xsd:element name="cs" type="CT_OnOff"/>
<xsd:element name="em" type="CT_Em"/>
<xsd:element name="lang" type="CT_Language"/>
<xsd:element name="eastAsianLayout" type="CT_EastAsianLayout"/>
<xsd:element name="specVanish" type="CT_OnOff"/>
<xsd:element name="oMath" type="CT_OnOff"/>
</xsd:choice>
<xsd:element name="rPrChange" type="CT_RPrChange" minOccurs="0"/>
</xsd:sequence>
</xsd:group>
<xsd:complexType name="CT_Fonts">
<xsd:attribute name="hint" type="ST_Hint"/>
<xsd:attribute name="ascii" type="s:ST_String"/>
<xsd:attribute name="hAnsi" type="s:ST_String"/>
<xsd:attribute name="eastAsia" type="s:ST_String"/>
<xsd:attribute name="cs" type="s:ST_String"/>
<xsd:attribute name="asciiTheme" type="ST_Theme"/>
<xsd:attribute name="hAnsiTheme" type="ST_Theme"/>
<xsd:attribute name="eastAsiaTheme" type="ST_Theme"/>
<xsd:attribute name="cstheme" type="ST_Theme"/>
</xsd:complexType>
<xsd:complexType name="CT_HpsMeasure">
<xsd:attribute name="val" type="ST_HpsMeasure" use="required"/>
</xsd:complexType>
<xsd:complexType name="CT_OnOff">
<xsd:attribute name="val" type="s:ST_OnOff"/>
</xsd:complexType>
<xsd:complexType name="CT_SignedHpsMeasure">
<xsd:attribute name="val" type="ST_SignedHpsMeasure" use="required"/>
</xsd:complexType>
<xsd:complexType name="CT_String">
<xsd:attribute name="val" type="s:ST_String" use="required"/>
</xsd:complexType>
<xsd:complexType name="CT_Underline">
<xsd:attribute name="val" type="ST_Underline"/>
<xsd:attribute name="color" type="ST_HexColor"/>
<xsd:attribute name="themeColor" type="ST_ThemeColor"/>
<xsd:attribute name="themeTint" type="ST_UcharHexNumber"/>
<xsd:attribute name="themeShade" type="ST_UcharHexNumber"/>
</xsd:complexType>
<xsd:complexType name="CT_VerticalAlignRun">
<xsd:attribute name="val" type="s:ST_VerticalAlignRun" use="required"/>
</xsd:complexType>
<!-- simple types -->
<xsd:simpleType name="ST_Hint">
<xsd:restriction base="xsd:string">
<xsd:enumeration value="default"/>
<xsd:enumeration value="eastAsia"/>
<xsd:enumeration value="cs"/>
</xsd:restriction>
</xsd:simpleType>
<xsd:simpleType name="ST_HpsMeasure">
<xsd:union memberTypes="s:ST_UnsignedDecimalNumber
s:ST_PositiveUniversalMeasure"/>
</xsd:simpleType>
<xsd:simpleType name="ST_OnOff">
<xsd:union memberTypes="xsd:boolean ST_OnOff1"/>
</xsd:simpleType>
<xsd:simpleType name="ST_OnOff1">
<xsd:restriction base="xsd:string">
<xsd:enumeration value="on"/>
<xsd:enumeration value="off"/>
</xsd:restriction>
</xsd:simpleType>
<xsd:simpleType name="ST_PositiveUniversalMeasure">
<xsd:restriction base="ST_UniversalMeasure">
<xsd:pattern value="[0-9]+(\.[0-9]+)?(mm|cm|in|pt|pc|pi)"/>
</xsd:restriction>
</xsd:simpleType>
<xsd:simpleType name="ST_SignedHpsMeasure">
<xsd:union memberTypes="xsd:integer s:ST_UniversalMeasure"/>
</xsd:simpleType>
<xsd:simpleType name="ST_Theme">
<xsd:restriction base="xsd:string">
<xsd:enumeration value="majorEastAsia"/>
<xsd:enumeration value="majorBidi"/>
<xsd:enumeration value="majorAscii"/>
<xsd:enumeration value="majorHAnsi"/>
<xsd:enumeration value="minorEastAsia"/>
<xsd:enumeration value="minorBidi"/>
<xsd:enumeration value="minorAscii"/>
<xsd:enumeration value="minorHAnsi"/>
</xsd:restriction>
</xsd:simpleType>
<xsd:simpleType name="ST_Underline">
<xsd:restriction base="xsd:string">
<xsd:enumeration value="single"/>
<xsd:enumeration value="words"/>
<xsd:enumeration value="double"/>
<xsd:enumeration value="thick"/>
<xsd:enumeration value="dotted"/>
<xsd:enumeration value="dottedHeavy"/>
<xsd:enumeration value="dash"/>
<xsd:enumeration value="dashedHeavy"/>
<xsd:enumeration value="dashLong"/>
<xsd:enumeration value="dashLongHeavy"/>
<xsd:enumeration value="dotDash"/>
<xsd:enumeration value="dashDotHeavy"/>
<xsd:enumeration value="dotDotDash"/>
<xsd:enumeration value="dashDotDotHeavy"/>
<xsd:enumeration value="wave"/>
<xsd:enumeration value="wavyHeavy"/>
<xsd:enumeration value="wavyDouble"/>
<xsd:enumeration value="none"/>
</xsd:restriction>
</xsd:simpleType>
<xsd:simpleType name="ST_UnsignedDecimalNumber">
<xsd:restriction base="xsd:unsignedLong"/>
</xsd:simpleType>
<xsd:simpleType name="ST_VerticalAlignRun">
<xsd:restriction base="xsd:string">
<xsd:enumeration value="baseline"/>
<xsd:enumeration value="superscript"/>
<xsd:enumeration value="subscript"/>
</xsd:restriction>
</xsd:simpleType>
|
