KFormula is a formula editor for KOffice and can be used to create and edit mathematical formulas that can be included in other KOffice documents. It provides simple input facilities and supports the functionality you expect from a KOffice application.

TODO

Flake

KFormula 1.x provides both a library and a kpart. KFormula 2 will still provide a part, but it won't provide a library anymore, it will make use of Calligra/Flake and provide a shape and a tool. To accomplish this we have to do the following:

Move code from libs/kformula to kformula/flake (IN PROGRESS)
KFormula application should make use of FormulaShape
Complete display support of FormulaShape elements
Use KConfig to get KFormula's default settings
Finish AttributeManager to handle defaults
Write FormulaTool to be able to edit FormulaShapes

ODF / MathML

KFormula 1.6 got great ODF / MathML support, but there're still some elements and attributes unsupported. The complete list of unsupported things follow. Each element of the list includes with kind of support is lacking: loading means that the property is lost while parsing the document, saving means that the property is not written, rendering means that the property is not properly shown, or not shown at all. Many of these tasks are quite easy to implement and could be considered Junior Jobs. (see also the testsuite)

NOTE: Only Presentation Markup is considered here.

Token Elements

mo

Support for attribute form: rendering ( Section 3.2.5.2, 3.2.5.7 )
Support for attribute fence: rendering ( Section 3.2.5.2, 3.2.5.7 )
Support for attribute separator: rendering ( Section 3.2.5.2, 3.2.5.7 )
Support for attribute lspace: rendering ( Section 3.2.5.2, 3.2.5.7 )
Support for attribute rspace: rendering ( Section 3.2.5.2, 3.2.5.7 )
Support for attribute stretchy: rendering ( Section 3.2.5.2, 3.2.5.7, 3.2.5.8 )
Support for attribute symmetric: rendering ( Section 3.2.5.2, 3.2.5.7, 3.2.5.8 )
Support for attribute maxsize: rendering ( Section 3.2.5.2, 3.2.5.7, 3.2.5.8 )
Support for attribute minsize: rendering ( Section 3.2.5.2, 3.2.5.7, 3.2.5.8 )
Support for attribute largeop: rendering ( Section 3.2.5.2, 3.2.5.7, 3.2.5.9 )
Support for attribute movablelimits: rendering ( Section 3.2.5.2, 3.2.5.7, 3.2.5.9 )
Support for attribute accent: rendering ( Section 3.2.5.2, 3.2.5.7 )

mtext

Proper support for space-like elements ( Section 3.2.6.2 )

mspace

Support for attribute linebreak: rendering ( Section 3.2.7.2 )

ms

Support for attribute lquote: rendering ( Section 3.2.8.2 )
Support for attribute rquote: rendering ( Section 3.2.8.2 )
Support for escaping content ( Section 3.2.8.2 )

Misc

Support for <malignmark> element inside Token Elements ( Sections 3.2.1, 3.5.5 )
Implement surrounding spaces around Token Elements

General Layout Schemata

mrow

Support for 1 argument behaviour as the argument itself ( Section 3.3.1.2.1 )
Support for proper grouping of mrow elements ( Section 3.3.1.3.1 )

mfrac

Support for attribute bevelled: rendering ( Section 3.3.2.2 )

mstyle

Support for attributes of all presentation elements which do not have required values ( Section 3.3.4.1, 3.3.4.2 ):

form (mo)
fence (mo)
separator (mo)
lspace (mo)
rspace (mo)
stretchy (mo)
symmetric (mo)
maxsize (mo)
minsize (mo)
largeop (mo)
movablelimits (mo)
accent (mo)
width (mspace)
heigth (mspace)
depth (mspace)
linebreak (mspace)
lquote (ms)
rquote (ms)
linethickness (mfrac)
numalign (mfrac)
denomalign (mfrac)
bevelled (mfrac)
PrivoxyWindowOpen(mfenced)
close (mfenced)
separators (mfenced)
notation (menclose)
subscriptshift (msub, msubsup, mmultiscripts)
superscriptshift (msup, msubsup, mmultiscripts)
accentunder (munder, munderover)
accent (mover, munderover)
align (mtable)
rowalign (mtable)
columnalign (mtable)
groupalign (mtable)
alignmentscope (mtable)
columnwidth (mtable)
width (mtable)
rowspacing (mtable)
columnspacing (mtable)
rowlines (mtable)
columnlines (mtable)
frame (mtable)
framespaciing (mtable)
equalrows (mtable)
equalcolumns (mtable)
displaystyle (mtable)
side (mtable)
minlabelspacing (mtable)
rowspan (mtd)
columnspan (mtd)
edge (malignmark)
selection (maction)

Support for rendering differences for attribute displaystyle ( Section 3.3.4.2.1 ) OPTIONAL
Support proper order of priority applying attribute scriptlevel ( Section 3.3.4.2.2 ) OPTIONAL

mfenced

Support for arbitrary string in attribute open ( Section 3.3.8.2 )
Support for arbitrary string in attribute close ( Section 3.3.8.2 )

menclose

Support for longdiv value ( Section 3.3.9.2 ) OPTIONAL
Support for actuarial value ( Section 3.3.9.2) OPTIONAL
Support for radical value ( Section 3.3.9.2 ) OPTIONAL
Support for box value ( Section 3.3.9.2) OPTIONAL
Support for roundedbox value ( Section 3.3.9.2 ) OPTIONAL
Support for circle value ( Section 3.3.9.2) OPTIONAL
Support for left value ( Section 3.3.9.2) OPTIONAL
Support for right value ( Section 3.3.9.2) OPTIONAL
Support for top value ( Section 3.3.9.2) OPTIONAL
Support for bottom value ( Section 3.3.9.2) OPTIONAL
Support for updiagonalstrike value ( Section 3.3.9.2) OPTIONAL
Support for downdiagonalstrike value ( Section 3.3.9.2) OPTIONAL
Support for verticalstrike value ( Section 3.3.9.2) OPTIONAL
Support for horizontalstrike value ( Section 3.3.9.2) OPTIONAL

Script and Limit Schemata

munder

Support for attribute accentunder: rendering ( Section 3.4.4.2 )
Proper rendering of underscript element

mover

Support for attribute accent: rendering ( Section 3.4.5.2 )
Proper rendering of overscript element

munderover

Support for attribute accent: rendering ( Section 3.4.6.2, 3.4.5.2 )
Support for attribute accentunder: rendering ( Section 3.4.6.2, 3.4.4.2 )
Proper rendering of overscript element
Proper rendering of underscript element

mmultiscripts

Support for <mmultiscripts> element: loading, saving, rendering ( Section 3.4.7.1 )
Support for attribute subscriptshift: loading, saving, rendering ( Section 3.4.7.2, 3.4.3.2 )
Support for attribute superscriptshift: loading, saving, rendering ( Section 3.4.7.2, 3.4.3.2 )

Tables and Matrices

mtable

Support proper alignment ( Section 3.5.5.10 )
Support for MathML 1.01 deprecated inferred mtr loading ( Section 3.5.1.1 ) OPTIONAL
Support for MathML 1.01 deprecated inferred mtd loading ( Section 3.5.1.1 ) OPTIONAL
Support for attribute align: rendering ( Section 3.5.1.2 )
Support for attribute rowalign: rendering ( Section 3.5.1.2 )
Support for attribute columnalign: rendering ( Section 3.5.1.2, 3.5.5 )
Support for attribute alignmentscope: rendering ( Section 3.5.1.2, 3.5.5, 3.5.5.9 )
Support for attribute columnwidth: rendering ( Section 3.5.1.2 )
Support for attribute width: rendering ( Section 3.5.1.2 )
Support for attribute rowspacing: rendering ( Section 3.5.1.2 )
Support for attribute columnspacing: rendering ( Section 3.5.1.2 )
Support for attribute rowlines: rendering ( Section 3.5.1.2 )
Support for attribute columnlines: rendering ( Section 3.5.1.2 )
Support for attribute frame: rendering ( Section 3.5.1.2 )
Support for attribute framespacing: rendering ( Section 3.5.1.2 )
Support for attribute equalrows: rendering ( Section 3.5.1.2 )
Support for attribute equalcolumns: rendering ( Section 3.5.1.2 )
Support for attribute displaystyle: rendering ( Section 3.5.1.2 )
Support for attribute side: rendering ( Section 3.5.1.2 )
Support for attribute minlabelspacing: rendering ( Section 3.5.1.2 )

mtr

Support for attribute rowalign: loading, saving, rendering ( Section 3.5.2.2 )
Support for attribute columnalign: loading, saving, rendering ( Section 3.5.2.2 )
Support for attribute groupalign: loading, saving, rendering ( Section 3.5.2.2, 3.5.5, 3.5.5.7 )

mlabeledtr

Support for <mlabeledtr> element: loading, saving, rendering ( Section 3.5.3 )
Support for attribute rowalign: loading, saving, rendering ( Section 3.5.3.2, 3.5.2.2 )
Support for attribute columnalign: loading, saving, rendering ( Section 3.5.3.2, 3.5.2.2 )
Support for attribute groupalign: loading, saving, rendering ( Section 3.5.3.2, 3.5.2.2, 3.5.5, 3.5.5.7 )

mtd

Support for attribute rowspan: loading, saving, rendering ( Section 3.5.4.2 )
Support for attribute columnspan: loading, saving, rendering ( Section 3.5.4.2 )
Support for attribute rowalign: loading, saving, rendering ( Section 3.5.4.2 )
Support for attribute columnalign: loading, saving, rendering ( Section 3.5.4.2 )
Support for attribute groupalign: loading, saving, rendering ( Section 3.5.4.2, 3.5.5, 3.5.5.7 )

malignmark

Support for <malignmark> element: loading, saving, rendering ( Section 3.5.5.4, 3.5.5.9 )
Support for attribute edge: loading, saving, rendering ( Section 3.5.5.5 )

maligngroup

Support for <maligngroup> element: loading, saving, rendering ( Section 3.5.5.1, 3.5.5.2, 3.5.5.3, 3.5.5.9 )
Support for attribute gropualign: loading, saving, rendering ( Section 3.5.5.6, 3.5.5.7 )

Enlivening Expressions

maction

Support for toggle actiontype ( Section 3.6.1.1 ) OPTIONAL
Support for statusline actiontype ( Section 3.6.1.1 ) OPTIONAL
Support for tooltip actiontype ( Section 3.6.1.1 ) OPTIONAL
Support for highlight actiontype ( Section 3.6.1.1 ) OPTIONAL

Misc

Full support for named unicode characters, ( Chapter 6 )

Filters

Support KFormula's old document format (.kfo) through a filter
Full TeX import / export support.

Font support

KFormula supports Unicode fonts and includes currently Arev Sans fonts, which have very good support for mathematical symbols. However, KFormula still relies on TeX fonts for some symbol drawing. Thus, work in this area include:

Find better math supporting free fonts. Arev Sans has good support, yet not perfect, if we find a better free font, we should provide it instead. This can be considered a Junior Job.
Get rid of TeX symbol drawing. These symbols are mostly different kind of brackets, not properly supported by Arev Sans currently. Once we find a font that supports them, we could fully rely on Unicode fonts.

Accesibility

Accesibility compliance. Fulfil Gary's report issues.

Usability

Direct formula edition, posibly through various languages: OOo, TeX, possibly others.
Usability review of KFormula

Scripting

Add kross support

Others

Wishlist in [1], apart from BUG #53563, which I consider out of scope for KFormula but could make sense integration with applications like KAlgebra.
Any other idea for KFormula, I'd like to hear it !
Comparison of Formula Editors