Commit Graph

22 Commits

Author SHA1 Message Date
7b794f90b9 fix: Always compute cells without clocked expressions using current values (#91)
Prior to this change, when a cell was clocked, it was always computed with prior values of referred-to cells. This had the effect, for example, of making cells defined only with a base expression as a total of a column, for example, to be out-of-date in that they would take on the value of the total of the prior values of the column, not the total of new current values of the column. This behavior was very counterintuitive.

With this change, updates of cells that have no clocked expression are delayed until after clocked expressions have been recomputed based on prior values and their cells' current values have been updated. Then the computations of those base-only cells use all of the new current values, leaving the spreadsheet in a (maximally) self-consistent state.

Resolves #90.

Co-authored-by: Glen Whitney <glen@studioinfinity.org>
Reviewed-on: #91
2023-04-30 16:19:12 +00:00
7f005f171e feat: Allow expressions in region functions and add count() accumulator (#86)
Co-authored-by: Glen Whitney <glen@studioinfinity.org>
Reviewed-on: #86
2023-04-29 23:18:57 +00:00
34e8b99585 fix: Allow n() function to count (empty) cells off edge of sheet (#84)
Resolves #83.

Co-authored-by: Glen Whitney <glen@studioinfinity.org>
Reviewed-on: #84
2023-04-09 19:28:57 +00:00
0ca9d0176b row_heights (#77)
Implements row heights and a command-line option `-F nn` for fteapot to set the general font size.

Also improves documentation and uniformizes key bindings somewhat between teapot and fteapot.

Resolves #57.

Co-authored-by: Glen Whitney <glen@studioinfinity.org>
Reviewed-on: #77
2023-04-09 05:41:50 +00:00
5cdb6271da Add dim and italic attributes to style
Closes #74
2019-09-18 08:49:53 -04:00
91a0087d2d Add READMEs for new examples, compress large one, update docs 2019-09-09 12:18:00 -04:00
d5fbc0ef07 Alleviate compile warnings on Linux and finalize programmable styles
This change gets teapot to compile without warnings on OpenSUSE Tumbleweed
  with the extended warnings flags that were recently added. It also represents
  a more thoroughly (but not exhaustively) tested and debugged version of the
  expression-controlled style settings from an earlier commit. The facility
  should be ready for use.

  It also adds a better pretty-printer for Token values in gdb and extensive
  edits to the documentation. It fixes a bug in max/min introduced by the
  addition of the Bool type and the switchover to comparisons returning Bool.
  It modifies the display of values too long to fit in their cells to show an
  initial segment of their contents with a continuation mark rather than
  obscuring the contents completely.

  Closes #54.
  Closes #55.
  Closes #44.
  Closes #22.
  Closes #13.
2019-09-09 10:33:41 -04:00
Glen Whitney
c52219f827 Allow styles to be computed
Needs further testing and documentation, will provide a more detailed commit
   message when that is checked in.
2019-09-03 01:41:37 -07:00
Glen Whitney
06938ec494 Implement a find() macro
This macro looks at each cell along some stride through the sheet,
  returning the location of the first cell encountered at which a given
  expression evaluates to true, or boolean false otherwise.

  To make this more useful, this change also revamps the handling of
  boolean values, making them much more permissive and coercing to boolean type
  in fewer circumstances. It adds the bool() type conversion for explicitly
  coercing to boolean type, and fixes a small issue with reading hex-formatted
  floating-point values ('p' can be used as an exponent indicator).

  Closes #64.
2019-08-28 12:40:50 -07:00
Glen Whitney
6534aec2fd Add type predicate
The main new finction is is(), which tests the type of a value. There
  are also constants for each of the possible token types, and one new
  conversion: number(), which converts a value into the most appropriate number
  type. This change also reuses the functions in scanner.h for exracting ints,
  floats, and identifiers from strings, rather than either rewriting the
  functionality elsewhere, or using the general-purpose scan when only one
  token type was of interest.
2019-08-27 23:30:02 -07:00
Glen Whitney
892fdcdb75 Add BOOL token_type, macros, and boolean operators
For clarity, it is valuable for the results of comparisons to show as "true"
  and "false" rather than "1" and "0". This change implements a BOOL type
  to facilitate that. Since we want logical operators to short-circuit, this
  change also obliges the introduction of macros, which are just like functions
  except their arguments are not evaluated before control is passed to the
  routine implementing the macro.
2019-08-26 23:56:19 -07:00
Glen Whitney
7e0ba7370d Add functions for unit displacements in the siz cardinal directions
This change is the "easy" part of #64, but to reduce the amount of duplicated
   code, this change also modifies the internals of implementing a function.
   The function identifier is now passed to the implementation as well, allowing
   many implementations of similar functions to be collapsed more easily.
2019-08-25 23:19:34 -07:00
Glen Whitney
96079b210e Make tpa the default file format for Teapot
There turned out to be one blocking technical issue for full adpotion of
  tpa format, and that was the fact that the printed representation of
  floating values inside the tpa file might not reproduce the same double
  when read. This change therefore introduces the "hexact" floating point
  format, based on the the %La format string, which produces a hex
  representation with exact round trips. While working on this, it was
  convenient to add a new representation "compact" which is basically the
  shorter of decimal and scientific representations, without trailing zeros.
  This is now the default float format, but of course one can select decimal
  or scientific formats to restore prior appearance. However, full-precision
  compact format is now the (only) format for editing cell contents, as it
  is accurate and efficient. Of course you can enter floating point values
  in any format you like when typing in a formula.

  The addition of several new floating point options overloaded the menus
  in terminal teapot, so this change also revamps those menus slightly,
  including eliminating the unused MenuChoice struct, and just specifying menus
  with an array of strings.

  Closes #63.
2019-08-24 09:58:46 -07:00
Glen Whitney
364ef2c0ea Streamline internals of teapot
The primary change is to add a “funcall” token, so that an entire expression
  can be encapsulated as a single token. This change is used to allow a cell to
  include simply a selection of appropriate semantic tokens. I.e., the content
  and iterative content are now each a single token like the value and the
  result value. Token vectors are used only as intermediate results in scanning
  and parsing.

  Not this means the cells are now in effect storing parse trees, so
  computation should be slightly faster and future extensions (like #56) should
  be facilitated.

  This commit also takes the opportunity while internals are being altered to
  add another token to a cell for future use for computed attributes, cf #22,
  and to change the internal numerical values from double and ints to long
  doubles and long longs. However, the change attempts to encapsulate that
  choice so it would be easy to change back or change to another representation.

  Note that these changes break savexdr(), as the internal binary format of
  a cell is now different. Rather than reimplement it, it is deprecated as
  the world does not need another binary spreadsheet format. Hence, the
  ascii format for teapot spreadsheets becomes the primary file format.
  Loading of old xdr files is still supported for backward compatibility.

  Closes #59.

  Also along the way, various other slight fixes and enhancements crept in,
  a partial but probably not exhaustive list of which follows:

  Fixes #31.

  Further revisions and improvements to documentation.

  Make the approximate comparison of floating point values scale more
  accurately with the size of the doubles being compared.

  Further extensions of absolute and relative cell addressing.

  Addition of (circle constant) tau function/constant.

  Modified string conversion to simply use internal printing routines, and
  to take "scientific" and "decimal" keywords.

  Allowed n() function to take a list of values, or just a single location
  defaulting to the current location.

  Added floor, ceil, trunc, and round functions, and allowed them to be
  keywords controlling the int() integer conversion function as well.

  Allowed substr() to drop its last argument to go to the end of the string.

  Provided an enum of built-in functions to preserve legacy function
  identifiers, allowing the large table inside func.c to be reorganized
  in a clearer fashion.

  Added additional annotation of properties of the built-in functions,
  including precedence.

  All operators are now also accessible as built-in functions.

  Made precedence of unary - lower than ^ to match python.

  Avoided inadvertently using FLTK @symbol abbreviations for formulas with
  "@" in them.
2019-08-23 12:12:06 -07:00
Glen Whitney
341b12ba04 Implement a relative reference robust to source and reference moving
The new function is X(SRC,REF), which briefly for a cell in the neighborhood
   of REF returns the corresponding cell in the neighborhood in SRC. For
   further details, see the updated documention.

   In developing and documenting this function, I refined some of the
   existing error messages (e.g. showing the coordinates when there is an
   attempt to obtain a cell with a negative coordinate) and improved the
   error propagation to increase the chance that the innermost error will
   percolate to the top level.
2019-07-30 15:07:54 -04:00
Glen Whitney
b3ea9f7ad9 Add relative address and at functions 2019-07-29 14:14:36 -04:00
Glen Whitney
a5bf64b061 Add bitwise logical functions 2019-07-29 13:22:15 -04:00
Glen Whitney
1114df2e13 Extend max/min to cover an explicit list of values. 2019-07-29 12:42:51 -04:00
Glen Whitney
9caf9bf1a5 Document the Fill With operation 2019-07-29 12:03:36 -04:00
Glen Whitney
2837cc2253 Document operations on locations. 2019-07-25 09:56:15 -04:00
Glen Whitney
c072cb9af4 Add more clock/reset keys and update docs
Provides additional keys to clock and reset the spreadsheet in GUI mode.
  Updated LyX manual to include GUI mode keys, including the new ones, to
  include some of the more recent features like bold and highlight, and
  also improved some phrasing throughout.
  Fixes #4.
2019-07-23 12:42:19 -07:00
Glen Whitney
f8a60447d6 Import exactly the files of the teapot-2.3.0 distribution 2019-07-22 13:32:33 -07:00