WordprocessingML allows for custom specification of tab stops at the paragraph level. Tab stop spacing is a subset of paragraph formatting in this system, so will be implemented within the docx.text.parfmt.ParagraphFormatting object. Tab stops will be handled as a List-like TabStops object made up of TabStop objects.
A TabStop object has three properties, alignment, leader, and position. Alignment is a WD_TAB_ALIGNMENT member and position is a Length() object.
Tab stops are always sorted in position order. Alignment defaults to WD_TAB_ALIGNMENT.LEFT, and leader defaults to WD_TAB_LEADER.SPACES.
Tab stops specify how tab characters in a paragraph are rendered. Insertion of tab characters is accomplished using the Run object.
Getting and setting tab stops:
>>> tab_stops = paragraph.paragraph_format.tab_stops
>>> tab_stops
<docx.text.parfmt.TabStops object at 0x104ea8c30>
>>> tab_stop = tab_stops.add_tab_stop(Inches(2), WD_TAB_ALIGNMENT.LEFT, WD_TAB_LEADER.DOTS)
# add_tab_stop defaults to WD_TAB_ALIGNMENT.LEFT, WD_TAB_LEADER.SPACES
>>> tab_stop = tab_stops.add_tab_stop(Inches(0.5))
>>> tab_stop.alignment
WD_TAB_ALIGNMENT.LEFT
>>> tab_stop.leader
WD_TAB_LEADER.SPACES
# TabStop properties are read/write
>>> tab_stop.position = Inches(2.5)
>>> tab_stop.alignment = WD_TAB_ALIGNMENT.CENTER
>>> tab_stop.leader = WD_TAB_LEADER.DASHES
# Tab stops are sorted into position order as created or modified
>>> [(t.position, t.alignment) for t in tab_stops]
[(914400, WD_TAB_ALIGNMENT.LEFT), (2286000, WD_TAB_ALIGNMENT.CENTER)]
# A tab stop is deleted using del statement
>>> len(tab_stops)
2
>>> del tab_stops[1]
>>> len(tab_stops)
1
# Restore default tabs
>>> tab_stops.clear()
When the w:tabs element is empty or not present, Word uses default tab stops (typically every half inch).
Word resumes using default tab stops following the last specified tab stop.
TabStops must be in position order within the XML. If they are not, the out- of-order tab stop will appear in the ruler and in the properties dialog, but will not actually be used by Word.
<w:pPr>
<w:tabs>
<w:tab w:val="left" w:leader="dot" w:pos="2880"/>
<w:tab w:val="decimal" w:pos="6480"/>
</w:tabs>
</w:pPr>
Name | XML | Value |
---|---|---|
wdAlignTabBar | bar | 4 |
wdAlignTabCenter | center | 1 |
wdAlignTabDecimal | decimal | 3 |
wdAlignTabLeft | left | 0 |
wdAlignTabList | list | 6 |
wdAlignTabRight | right | 2 |
Additional Enumeration values not appearing in WdTabAlignment
Name | XML | Value |
---|---|---|
wdAlignTabClear | clear | 101 |
wdAlignTabEnd | end | 102 |
wdAlignTabNum | num | 103 |
wdAlignTabStart | start | 104 |
Name | XML | Value |
---|---|---|
wdTabLeaderDashes | hyphen | 2 |
wdTabLeaderDots | dot | 1 |
wdTabLeaderHeavy | heavy | 4 |
wdTabLeaderLines | underscore | 3 |
wdTabLeaderMiddleDot | middleDot | 5 |
wdTabLeaderSpaces | none | 0 |
The MS API defines a TabStops object which is a collection of TabStop objects.
<xsd:complexType name="CT_PPr"> <!-- denormalized -->
<xsd:sequence>
<xsd:element name="pStyle" type="CT_String" minOccurs="0"/>
<xsd:element name="keepNext" type="CT_OnOff" minOccurs="0"/>
<xsd:element name="keepLines" type="CT_OnOff" minOccurs="0"/>
<xsd:element name="pageBreakBefore" type="CT_OnOff" minOccurs="0"/>
<xsd:element name="framePr" type="CT_FramePr" minOccurs="0"/>
<xsd:element name="widowControl" type="CT_OnOff" minOccurs="0"/>
<xsd:element name="numPr" type="CT_NumPr" minOccurs="0"/>
<xsd:element name="suppressLineNumbers" type="CT_OnOff" minOccurs="0"/>
<xsd:element name="pBdr" type="CT_PBdr" minOccurs="0"/>
<xsd:element name="shd" type="CT_Shd" minOccurs="0"/>
<xsd:element name="tabs" type="CT_Tabs" minOccurs="0"/>
<xsd:element name="suppressAutoHyphens" type="CT_OnOff" minOccurs="0"/>
<xsd:element name="kinsoku" type="CT_OnOff" minOccurs="0"/>
<xsd:element name="wordWrap" type="CT_OnOff" minOccurs="0"/>
<xsd:element name="overflowPunct" type="CT_OnOff" minOccurs="0"/>
<xsd:element name="topLinePunct" type="CT_OnOff" minOccurs="0"/>
<xsd:element name="autoSpaceDE" type="CT_OnOff" minOccurs="0"/>
<xsd:element name="autoSpaceDN" type="CT_OnOff" minOccurs="0"/>
<xsd:element name="bidi" type="CT_OnOff" minOccurs="0"/>
<xsd:element name="adjustRightInd" type="CT_OnOff" minOccurs="0"/>
<xsd:element name="snapToGrid" type="CT_OnOff" minOccurs="0"/>
<xsd:element name="spacing" type="CT_Spacing" minOccurs="0"/>
<xsd:element name="ind" type="CT_Ind" minOccurs="0"/>
<xsd:element name="contextualSpacing" type="CT_OnOff" minOccurs="0"/>
<xsd:element name="mirrorIndents" type="CT_OnOff" minOccurs="0"/>
<xsd:element name="suppressOverlap" type="CT_OnOff" minOccurs="0"/>
<xsd:element name="jc" type="CT_Jc" minOccurs="0"/>
<xsd:element name="textDirection" type="CT_TextDirection" minOccurs="0"/>
<xsd:element name="textAlignment" type="CT_TextAlignment" minOccurs="0"/>
<xsd:element name="textboxTightWrap" type="CT_TextboxTightWrap" minOccurs="0"/>
<xsd:element name="outlineLvl" type="CT_DecimalNumber" minOccurs="0"/>
<xsd:element name="divId" type="CT_DecimalNumber" minOccurs="0"/>
<xsd:element name="cnfStyle" type="CT_Cnf" minOccurs="0"/>
<xsd:element name="rPr" type="CT_ParaRPr" minOccurs="0"/>
<xsd:element name="sectPr" type="CT_SectPr" minOccurs="0"/>
<xsd:element name="pPrChange" type="CT_PPrChange" minOccurs="0"/>
</xsd:sequence>
</xsd:complexType>
<xsd:complexType name="CT_Tabs">
<xsd:sequence>
<xsd:element name="tab" type="CT_TabStop" maxOccurs="unbounded"/>
</xsd:sequence>
</xsd:complexType>
<xsd:complexType name="CT_TabStop">
<xsd:attribute name="val" type="ST_TabJc" use="required"/>
<xsd:attribute name="leader" type="ST_TabTlc" use="optional"/>
<xsd:attribute name="pos" type="ST_SignedTwipsMeasure" use="required"/>
</xsd:complexType>
<xsd:simpleType name="ST_TabJc">
<xsd:restriction base="xsd:string">
<xsd:enumeration value="clear"/>
<xsd:enumeration value="start"/>
<xsd:enumeration value="center"/>
<xsd:enumeration value="end"/>
<xsd:enumeration value="decimal"/>
<xsd:enumeration value="bar"/>
<xsd:enumeration value="num"/>
<xsd:enumeration value="left"/>
<xsd:enumeration value="right"/>
</xsd:restriction>
</xsd:simpleType>
<xsd:simpleType name="ST_TabTlc">
<xsd:restriction base="xsd:string">
<xsd:enumeration value="none"/>
<xsd:enumeration value="dot"/>
<xsd:enumeration value="hyphen"/>
<xsd:enumeration value="underscore"/>
<xsd:enumeration value="heavy"/>
<xsd:enumeration value="middleDot"/>
</xsd:restriction>
</xsd:simpleType>