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ods_table.pl
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ods_table.pl
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:- module(ods_table,
[ ods_load/1, % :File
ods_current/1, % :URL
ods_unload/0,
ods_unload_all/0,
ods_compile/0,
ods_compile_all/0,
ods_eval/2, % +Expression, -Value
ods_style_property/2, % :Style, ?Property
cell_value/4, % :Sheet, ?X, ?Y, ?Value
cell_type/4, % :Sheet, ?X, ?Y, ?Type
cell_formula/4, % :Sheet, ?X, ?Y, ?Formula
cell_eval/4, % :Sheet, ?X, ?Y, -Value
cell_style/4, % :Sheet, ?X, ?Y, ?Property
cell/8, % :Sheet, ?X, ?Y, ?V, ?T, ?F, ?S, ?A
column_name/2, % ?Index, ?Name
ods_DOM/3, % :Source, -DOM, +Options
cell_id/3, % ?X, ?Y, ?Id
sheet_name_need_quotes/1, % +SheetName
ods_reference//2 % -Expr, +Table
]).
:- use_module(library(xpath)).
:- use_module(library(sgml)).
:- use_module(library(uri)).
:- use_module(library(archive)).
:- use_module(library(apply_macros)).
:- use_module(library(lists)).
:- use_module(library(dcg/basics)).
:- use_module(library(aggregate)).
:- use_module(of_functions).
:- use_module(bisect).
:- set_prolog_flag(optimise, true).
/** <module> Load Open Document Spreadsheets
This module loads an Open Document spreadsheet into the Prolog database.
The primary call is ods_load/1, which adds the following facts into the
calling module:
* sheet(Sheet, Style)
* col(Sheet, X, Style)
* row(Sheet, Y, Style)
* cell(Sheet, Id, Value, Type, Formula, Style, Annotation)
* span(Id, IdBase)
* style(Name, XMLDOM)
In addition, it provides the following high-level query primitives:
cell_value/4, cell_type/4, cell_formula/4, cell_eval/4 and cell_style/4.
All these predicates use the same calling convention, e.g.,
==
cell_value(Sheet, X, Y, Value)
==
where Sheet is the name of the sheet, X is the column (an integer) and Y
is the row (an integer). Value is the current value of the cell.
Although integer columns are easier for computation, these predicates do
allow specifying the column as an atom. E.g., the value of cell
=|WindOffshore.D43|= can be requested using the call below. This is
mainly intended for querying from the toplevel.
==
?- cell_value('WindOffshore', d, 43, X).
X = 0.07629.
==
Values are represented using the following conventions:
* Textual values are represented using an atom
* Numerical values are represented using Prolog numbers
* Booleans are represented as @true or @false
* Errors are representated as #(Error)
@tbd Add interface to query cell spanning
@tbd Correctly report cell boolean and error values.
*/
:- meta_predicate
ods_load(:),
ods_current(:),
ods_eval(:, -),
ods_style_property(:, ?),
cell_value(:, ?, ?, ?),
cell_type(:, ?, ?, ?),
cell_formula(:, ?, ?, ?),
cell_eval(:, ?, ?, ?),
cell_style(:, ?, ?, ?),
cell(:, ?, ?, ?, ?, ?, ?, ?).
:- dynamic
ods_spreadsheet/2. % URL, Module
%% ods_DOM(+File, -DOM, +Options) is det.
%
% DOM is the XML domtree of the content file of the given ODS
% document.
ods_DOM(File, DOM, Options) :-
setup_call_cleanup(
archive_open(File, Archive, []),
archive_dom(Archive, DOM, Options),
archive_close(Archive)).
archive_dom(Archive, DOM, Options) :-
select_option(member(Member), Options, XMLOptions, 'content.xml'),
archive_next_header(Archive, Member),
setup_call_cleanup(
archive_open_entry(Archive, Stream),
load_structure(Stream, DOM, XMLOptions),
close(Stream)).
%% ods_load(:Data)
%
% Load a spreadsheet. Data is either a parsed XML DOM, a file name
% or a URI. Tables in the spreadsheet are converted into a set of
% Prolog predicates in the calling module. The generated
% predicates are:
%
% - sheet(Name, Style)
% - col(Table, X, Style)
% - row(Table, Y, Style)
% - cell(Table, ID, Value, Type, Formula, Style, Annotation)
% - span(ID, IDBase)
% - style(Style, Properties)
%
% Does nothing if the spreadsheet is already loaded in the target
% module. To force reloading, first use ods_unload/0.
ods_load(Module:DOM) :-
nonvar(DOM),
DOM = [element(_,_,_)], !,
load_styles(DOM, Module),
load_tables(DOM, Module).
ods_load(Module:Spec) :-
( uri_is_global(Spec)
-> uri_file_name(Spec, File),
URI = Spec
; uri_file_name(URI, Spec),
File = Spec
),
( ods_spreadsheet(URI, Module)
-> true
; statistics(cputime, CPU0),
ods_DOM(File, DOM, []),
dynamic_decls(Module),
ods_load(Module:DOM),
statistics(cputime, CPU1),
CPU is CPU1-CPU0,
predicate_property(Module:sheet(_,_),
number_of_clauses(Sheets)),
predicate_property(Module:cell(_,_,_,_,_,_,_),
number_of_clauses(Cells)),
print_message(informational,
ods(loaded(Module:Spec, CPU, Sheets, Cells))),
retractall(ods_spreadsheet(URI, _)),
assertz(ods_spreadsheet(URI, Module))
).
%% ods_ensure_loaded(+URL, -Module) is semidet.
%
% True when the spreadsheet in URL is loaded into Module.
ods_ensure_loaded(URI, Module) :-
ods_spreadsheet(URI, Module), !,
Module \= #(_).
ods_ensure_loaded(URI, Module) :-
uri_file_name(URI, File),
( access_file(File, read)
-> ods_load(URI:File),
Module = URI
; assertz(ods_spreadsheet(URI, #('REF!')))
).
%% cell_id(+X, +Y, -ID) is det.
%% cell_id(-X, -Y, +ID) is det.
cell_id(X, Y, ID) :-
nonvar(X), nonvar(Y), !,
( integer(X)
-> ID is Y*10000+X
; upcase_atom(X, XU),
column_name(I, XU),
ID is Y*10000+I
).
cell_id(X, Y, ID) :-
nonvar(ID), !,
Y is ID//10000,
X is ID mod 10000.
load_tables(DOM, Module) :-
forall(xpath(DOM, //'table:table'(@'table:name'=Name,
@'table:style-name'=Style), Table),
load_table(Table, Name, Style, Module)).
load_table(DOM, Name, TStyle, Module) :-
assertz(Module:sheet(Name, TStyle)),
State = state(1,1,Name,_),
forall(xpath(DOM, 'table:table-column'(@'table:style-name'=Style), Col),
load_column(Col, Style, State, Module)),
forall(xpath(DOM, 'table:table-row'(@'table:style-name'=Style), Col),
load_row(Col, Style, State, Module)).
load_column(element(_, CollAttrs, []), Style, State, Module) :-
arg(1, State, X0),
arg(3, State, Table),
( memberchk('table:number-columns-repeated'=RepA, CollAttrs),
atom_number(RepA, Rep)
-> true
; Rep = 1
),
End is X0+Rep-1,
forall(between(X0, End, X),
assertz(Module:col(Table, X, Style))),
NextX is End+1,
nb_setarg(1, State, NextX).
load_row(DOM, Style, State, Module) :-
DOM = element(_, RowAttrs, _),
nb_setarg(1, State, 1),
arg(2, State, Y0),
arg(3, State, Table),
( memberchk('table:number-rows-repeated'=RepA, RowAttrs),
atom_number(RepA, Rep)
-> true
; Rep = 1
),
End is Y0+Rep-1,
( nonempty_row(DOM)
-> forall(between(Y0, End, Y),
( assertz(Module:row(Table, Y, Style)),
debug(ods(row), 'Processing row ~q', [Y]),
forall(xpath(DOM, 'table:table-cell'(self), Cell),
load_cell(Cell, State, Module))
))
; true
),
NextY is End + 1,
nb_setarg(2, State, NextY).
nonempty_row(DOM) :-
xpath(DOM, 'table:table-cell'(content), Content),
Content \== [].
load_cell(DOM, State, Module) :-
DOM = element(_, CellAttrs, Content),
arg(1, State, X0),
arg(2, State, Y),
arg(3, State, Table),
( memberchk('table:number-columns-repeated'=RepA, CellAttrs),
atom_number(RepA, Rep)
-> Columns = Rep, Repeat = Rep, Span = 1
; memberchk('table:number-columns-spanned'=SpanA, CellAttrs),
atom_number(SpanA, Span)
-> Columns = Span, Repeat = 1
; Columns = 1, Repeat = 1, Span = 1
),
( memberchk('table:number-rows-spanned'=VSpanA, CellAttrs),
atom_number(VSpanA, VSpan)
-> true
; VSpan = 1
),
EndRep is X0+Repeat-1,
( Content == []
-> debug(ods(cell), '~w empty cells', [Columns]),
( cell_style(DOM, Style),
Style \== default
-> forall(between(X0, EndRep, X),
( debug(ods(cell), '~q,~q: ~q', [X,Y,Value]),
cell_id(X,Y,Id),
assertz(Module:cell(Table,Id,
@empty,
no_type,
-,
Style,
[]))
))
; true
)
; Content = [Annotation],
xpath(Annotation, /'office:annotation'(self), _)
-> ( cell_style(DOM, Style),
cell_annotations(DOM, Annotations)
-> forall(between(X0, EndRep, X),
( debug(ods(cell), '~q,~q: ~q', [X,Y,Value]),
cell_id(X,Y,Id),
assertz(Module:cell(Table,Id,
@empty,
no_type,
-,
Style,
Annotations))
))
; ods_warning(convert_failed(cell, DOM))
)
; ( cell_type(DOM, Type),
cell_style(DOM, Style),
cell_value(DOM, Type, Value),
cell_formula(DOM, Table, Formula),
cell_annotations(DOM, Annotations)
-> forall(between(X0, EndRep, X),
( debug(ods(cell), '~q,~q: ~q', [X,Y,Value]),
cell_id(X,Y,Id),
assertz(Module:cell(Table,Id,
Value,
Type,
Formula,
Style,
Annotations))
))
; ods_warning(convert_failed(cell, DOM))
)
),
( (Span > 1 ; VSpan > 1)
-> cell_id(X0,Y,Id0),
EndSpanX is X0+Columns-1,
EndSpanY is Y+VSpan-1,
forall(between(Y, EndSpanY, YS),
forall(between(X0, EndSpanX, XS),
( cell_id(XS,YS,IDS),
( IDS \== Id0
-> assertz(Module:span(IDS, Id0))
; true
)
)))
; true
),
NextX is X0+Columns,
nb_setarg(1, State, NextX).
cell_type(DOM, Type) :-
xpath(DOM, /'table:table-cell'(@'office:value-type'), OfficeType),
OfficeType = Type.
cell_style(DOM, Style) :-
xpath(DOM, /'table:table-cell'(@'table:style-name'), Style), !.
cell_style(_, default). % TBD: Use default column style
cell_value(DOM, Type, Value) :-
xpath(DOM, /'table:table-cell'(@'office:value'), OfficeValue), !,
convert_value(Type, OfficeValue, Value).
cell_value(DOM, date, Value) :-
xpath(DOM, /'table:table-cell'(@'office:date-value'), OfficeValue), !,
convert_date(OfficeValue, Value).
cell_value(DOM, string, Value) :-
findall(T, xpath(DOM, 'text:p'(normalize_space), T), List),
atomic_list_concat(List, Value).
convert_value(float, Text, Value) :- !,
( atom_number(Text, Value0)
-> Value is float(Value0)
; type_error(float, Text)
).
convert_value(percentage, Text, Value) :- !,
( atom_number(Text, Value0)
-> Value is float(Value0)
; type_error(percentage, Text)
).
convert_value(Type, Value, Value) :-
ods_warning(unknown_type(Type)).
convert_date(Text, date(Y,M,D)) :-
atom_codes(Text, Codes),
phrase(date(Y,M,D), Codes), !.
convert_date(Text, Text) :-
ods_warning(convert_failed(date, Text)).
date(Y,M,D) -->
integer(Y), "-", integer(M), "-", integer(D),
{ between(1, 12, M),
between(1, 31, D)
}.
%% cell_annotations(+DOM, -Annotations:list) is det.
cell_annotations(DOM, Annotations) :-
findall(Annot, cell_annotation(DOM, Annot), Annotations).
cell_annotation(DOM, Term) :-
xpath(DOM, 'office:annotation'(self), Annotation),
( convert_annotation(Annotation, Term)
-> true
; ods_warning(convert_failed(annotation, DOM))
).
convert_annotation(DOM, annotation(Date, Author, Text)) :-
xpath(DOM, 'dc:date'(text), DateText),
parse_time(DateText, Date),
findall(T, xpath(DOM, 'text:p'(text), T), List),
List = [Author|Rest],
atomic_list_concat(Rest, Text).
%% cell_formula(+DOM, +Table, -Formula) is det.
cell_formula(DOM, Table, Formula) :-
xpath(DOM, /'table:table-cell'(@'table:formula'), OfficeFormula), !,
( compile_formula(OfficeFormula, Table, Formula)
-> true
; ods_warning(convert_failed(formula, OfficeFormula)),
Formula = OfficeFormula
).
cell_formula(_, _, -).
/*******************************
* STYLES *
*******************************/
%% load_styles(+DOM, +Module) is det.
%
% Load the style information for the spreadsheet. We simply store
% the DOM content of the style, leaving the high-level reasoning
% to other predicates. One advantage of this is that we can
% re-generate the style info.
%
% @tbd Styles defined here may refer to styles in =|styles.xml|=.
load_styles(DOM, Module) :-
xpath(DOM, //'office:automatic-styles'(self), StylesDOM), !,
forall(xpath(StylesDOM, 'style:style'(@'style:name' = Name), SDOM),
assertz(Module:style(Name, SDOM))).
%% ods_style_property(:Style, ?Property) is nondet.
%
% True when Property is a property of Style. Currently extracted
% styles are:
%
% * font_weight(Weight)
% Font weight (e.g., =bold=)
% * font_name(Name)
% Name of the font used for the text
% * font_size(Size)
% Size of the font. See below for size representations.
% * column_width(Width)
% Width of the column
% * cell_color(Color)
% Color of the cell background
% * name(Name)
% Name of the style.
%
% Sizes are expressed as one of pt(Points), cm(Centimeters) or
% mm(Millimeters)
%
% @tbd Normalize sizes?
% @see http://docs.oasis-open.org/office/v1.2/OpenDocument-v1.2-part1.html
ods_style_property(Module:Style, Property) :-
Module:style(Style, DOM),
( nonvar(Property)
-> once(style_property(Property, DOM))
; style_property(Property, DOM)
).
style_property(font_weight(W), DOM) :-
xpath(DOM, 'style:text-properties'(@'fo:font-weight'=W), _).
style_property(font_name(Name), DOM) :-
xpath(DOM, 'style:text-properties'(@'style:font-name'=Name), _).
style_property(name(Name), DOM) :-
xpath(DOM, /'style:style'(@'style:name'=Name), _).
style_property(font_size(Size), DOM) :-
xpath(DOM, 'style:text-properties'(@'fo:font-size'=Size0), _),
convert_size(Size0, Size).
style_property(column_width(Size), DOM) :-
xpath(DOM, 'style:table-column-properties'(@'style:column-width'=Size0), _),
convert_size(Size0, Size).
style_property(cell_color(Color), DOM) :-
xpath(DOM, 'style:table-cell-properties'(@'fo:background-color'=Color),_),
Color \== transparent.
convert_size(Atom, Term) :-
size_suffix(Suffix),
atom_concat(NumA, Suffix, Atom),
atom_number(NumA, Num), !,
Term =.. [Suffix,Num].
convert_size(Atom, Atom) :-
ods_warning(unknown_size(Atom)).
size_suffix(pt).
size_suffix(cm).
size_suffix(mm).
/*******************************
* FORMULAS *
*******************************/
%% compile_formula(OfficeFormula, Table, Formula) is det.
%
% Compile a formula into a Prolog expression. Cells are of the
% form cell(X,Y).
%
% @see http://en.wikipedia.org/wiki/OpenFormula
% @see http://docs.oasis-open.org/office/v1.2/OpenDocument-v1.2-part2.html
compile_formula(Text, Table, Formula) :-
atom_codes(Text, Codes),
phrase(formula(Formula, Table), Codes), !.
formula(Formula, Table) -->
"of:=",
expression(Formula, 1200, _, Table).
expression(Expr, Pri, RPri, Table) -->
blanks,
( ods_number(Expr0)
; ods_string(Expr0)
% ; ods_array(Expr0)
; ods_prefix_func(Expr0, Pri, RPri0, Table)
; "(", expression(Expr0, 1200, _, Table), ")"
; ods_function_call(Expr0, Table)
; ods_reference(Expr0, Table)
% ; ods_quoted_label(Expr0)
% ; ods_automatic_intersection(Expr0)
% ; ods_named_expression(Expr0)
% ; ods_error(Expr0)
), blanks, !,
{ var(RPri0) -> RPri0 = 0 ; true },
ods_op_func(Expr0, Pri, RPri0, RPri, Expr, Table).
ods_prefix_func(Expr, Pri, OpPri, Table) -->
ods_op(Op, prefix(OpPri, ArgPri)),
{ OpPri =< Pri },
expression(Expr0, ArgPri, _, Table),
{ Expr =.. [Op,Expr0] }.
%% ods_op_func(+LeftExpr, +MaxPri, +LeftExprPri, -Expr) is semidet.
ods_op_func(Left, Pri, PriL, RPri, Expr, Table) -->
ods_op(Op, infix(OpPri, LeftPri, RightPri)),
{ PriL =< LeftPri, OpPri =< Pri },
expression(Right, RightPri, _, Table),
{ Expr1 =.. [Op,Left,Right] },
ods_op_func(Expr1, Pri, OpPri, RPri, Expr, Table).
ods_op_func(Left, Pri, PriL, RPri, Expr, Table) -->
ods_op(Op, postfix(OpPri, LeftPri)),
{ PriL =< LeftPri, OpPri =< Pri },
{ Expr1 =.. [Op,Left] },
ods_op_func(Expr1, Pri, OpPri, RPri, Expr, Table).
ods_op_func(Expr, _, Pri, Pri, Expr, _) -->
"".
ods_op(Op, Type) -->
ods_op(Op),
{ ods_op(Op, Type) }.
ods_op(':') --> ":".
ods_op('!') --> "!".
ods_op('~') --> "~".
ods_op('+') --> "+".
ods_op('-') --> "-".
ods_op('%') --> "%".
ods_op('^') --> "^".
ods_op('*') --> "*".
ods_op('/') --> "/".
ods_op('&') --> "&".
ods_op('=') --> "=".
ods_op('<>') --> "<>".
ods_op('<=') --> "<=".
ods_op('<') --> "<".
ods_op('>=') --> ">=".
ods_op('>') --> ">".
ods_op(':', infix(10, 10, 9)).
ods_op('!', infix(20, 20, 19)).
ods_op('~', infix(30, 30, 29)).
ods_op('+', prefix(40, 40)).
ods_op('-', prefix(40, 40)).
ods_op('%', postfix(50, 50)).
ods_op('^', infix(60, 60, 59)).
ods_op('*', infix(70, 70, 69)).
ods_op('/', infix(70, 70, 69)).
ods_op('+', infix(80, 80, 79)).
ods_op('-', infix(80, 80, 79)).
ods_op('&', infix(90, 90, 89)).
ods_op('=', infix(100, 100, 99)).
ods_op('<>', infix(100, 100, 99)).
ods_op('<', infix(100, 100, 99)).
ods_op('<=', infix(100, 100, 99)).
ods_op('>', infix(100, 100, 99)).
ods_op('>=', infix(100, 100, 99)).
%% ods_number(-Number)// is semidet.
%
% Deal with numbers that start with . instead of 0.
ods_number(N) -->
number(N), !.
ods_number(N) -->
dot,
digit(DF0),
digits(DF),
{ F = [0'0, 0'., DF0|DF] },
( exp
-> int_codes(DI),
{E=[0'e|DI]}
; {E = ""}
),
{ append([F, E], Codes),
number_codes(N, Codes)
}.
int_codes([C,D0|D]) -->
sign(C), !,
digit(D0),
digits(D).
int_codes([D0|D]) -->
digit(D0),
digits(D).
sign(0'-) --> "-".
sign(0'+) --> "+".
dot --> ".".
exp --> "e".
exp --> "E".
%% ods_string(-Atom)//
ods_string(String) -->
"\"", str_codes(Codes), "\"",
{ atom_codes(String, Codes) }.
str_codes([H|T]) -->
str_code(H), !,
str_codes(T).
str_codes([]) -->
"".
str_code(0'") --> "\"\"", !.
str_code(C) --> [C], { C \== 0'" }.
%% ods_function_call(Expr0)// is semidet.
ods_function_call(eval(Expr), Table) -->
function_name(Name),
blanks, "(", parameter_list(Args, Table),
{ Expr =.. [Name|Args] }.
parameter_list([], _) -->
")", !.
parameter_list([H|T], Table) -->
expression(H, 1200, _, Table), !, blanks,
( ";"
-> blanks,
parameter_list(T, Table)
; ")"
-> { T = [] }
).
function_name(Name) -->
letter_xml(C0),
function_name_codes(C),
{ atom_codes(Name, [C0|C]) }.
function_name_codes([H|T]) -->
function_name_code(H), !,
function_name_codes(T).
function_name_codes([]) --> "".
function_name_code(C) -->
[C],
{ xml_basechar(C)
; xml_digit(C)
; C == 0'_
; C == 0'.
; xml_ideographic(C)
; xml_combining_char(C)
}, !.
letter_xml(C) --> [C], { xml_basechar(C) ;
xml_ideographic(C)
}, !.
%% ods_reference(Expr0, Table)
ods_reference(Expr, Table) -->
"[", reference(Expr, Table), "]", !.
reference(ext(IRI, Range), Table) -->
"'", !, string(Codes), "'#",
{ atom_codes(IRI0, Codes),
fixup_reference(IRI0, IRI)
},
range_address(Range, Table).
reference(Range, Table) -->
range_address(Range, Table).
reference(#('REF!'), _) -->
"#REF!".
:- dynamic
fixed_up/2.
fixup_reference(IRI0, IRI) :-
fixed_up(IRI0, IRI), !.
fixup_reference(IRI0, IRI) :-
uri_file_name(IRI0, File),
( access_file(File, read)
-> IRI = IRI0
; file_base_name(File, Base),
file_name_extension(Plain, _, Base),
file_name_extension(Plain, ods, Local),
access_file(Local, read)
-> uri_file_name(IRI, Local),
print_message(informational, ods(updated_ext(IRI0, IRI)))
; print_message(warning, ods(no_ext(IRI0))),
IRI = IRI0
),
assertz(fixed_up(IRI0, IRI)).
clean_fixup :-
retractall(fixed_up(_,_)).
%% range_address(-Ref, +DefaultTable)
range_address(Ref, Table) -->
sheet_locator_or_empty(Sheet, Table),
".",
( cell(SX,SY)
-> ( ":."
-> cell(EX,EY),
{ Ref = cell_range(Sheet, SX, SY, EX, EY) }
; { Ref = cell(Sheet, SX, SY) }
)
; column(Start)
-> ":.",
column(End),
{ Ref = col_range(Sheet, Start, End) }
; row(Start)
-> ":.",
row(End),
{ Ref = row_range(Sheet, Start, End) }
).
range_address(Ref, _Table) -->
sheet_locator(Sheet),
".",
( cell(SX, SY)
-> ":",
sheet_locator(Sheet2), cell(EX, EY),
{ Ref = xcell_range(Sheet, SX, SY, Sheet2, EX, EY) }
; column(Start)
-> ":",
sheet_locator(Sheet2), column(End),
{ Ref = xcol_range(Sheet, Start, Sheet2, End) }
; row(Start)
-> ":",
sheet_locator(Sheet2), row(End),
{ Ref = xrow_range(Sheet, Start, Sheet2, End) }
).
sheet_locator_or_empty(Sheet, _) -->
sheet_locator(Sheet).
sheet_locator_or_empty(Table, Table) --> "".
sheet_locator(Sheet) -->
sheet_name(Name),
subtable_path(Name, Sheet).
subtable_path(Name, Locator) -->
".",
subtable_cell(One),
{ Path0 = Name/One },
subtable_path(Path0, Locator).
subtable_path(Path, Path) --> "".
subtable_cell(Cell) -->
cell(Cell), !.
subtable_cell(Sheet) -->
sheet_name(Sheet).
sheet_name(Name) -->
( "$" -> "" ; "" ),
( single_quoted(Name)
; sheet_name_code(C0),
sheet_name_codes(Codes)
-> { atom_codes(Name, [C0|Codes]) }
).
cell(cell(X,Y)) -->
column(X),
row(Y).
cell(X, Y) -->
column(X),
row(Y).
column(Col) -->
( "$" -> "" ; "" ),
coln(0, Col).
coln(C0, C) -->
[D],
{ between(0'A, 0'Z, D), !,
C1 is C0*26+D-0'A+1
},
coln(C1, C).
coln(C, C) --> "".
row(Row) -->
( "$" -> "" ; "" ),
rown(0, Row).
rown(R0, R) -->
[D],
{ between(0'0, 0'9, D), !,
R1 is R0*10+D-0'0
},
rown(R1, R).
rown(R, R) --> "".
%% single_quoted(-Atom)
single_quoted(String) -->
"'", sq_codes(Codes), "'",
{ atom_codes(String, Codes) }.
sq_codes([H|T]) -->
sq_code(H), !,
sq_codes(T).
sq_codes([]) -->
"".
sq_code(0'\') --> "''", !.
sq_code(C) --> [C], { C \== 0'\' }.
sheet_name_codes([H|T]) -->
sheet_name_code(H), !,
sheet_name_codes(T).
sheet_name_codes([]) --> "".
sheet_name_code(C) -->
[C],
{ \+ not_in_sheet_name(C) }.
not_in_sheet_name(0']).
not_in_sheet_name(0'.).
not_in_sheet_name(0'\s).
not_in_sheet_name(0'#).
not_in_sheet_name(0'$).
%% sheet_name_need_quotes(+Name) is semidet.
%
% True when Name is a sheet name that needs (single) quotes.
sheet_name_need_quotes(Name) :-
atom_codes(Name, Codes),
member(Code, Codes),
not_in_sheet_name(Code), !.
/*******************************
* CELL PROPERTIES *
*******************************/
%% cell_value(:Sheet, ?X, ?Y, ?Value)
%
% True when cell X,Y in Sheet has Value.
cell_value(Module:Sheet, X, Y, Value) :-
( ground(cell(Sheet,X,Y))
-> cell_id(X,Y,Id),
once(Module:cell(Sheet, Id, Value, _, _, _, _))
; Module:cell(Sheet, Id, Value, _, _, _, _),
cell_id(X,Y,Id)
),
Value \== @empty.
%% cell_type(:Sheet, ?X, ?Y, ?Type)
%
% True when cell X,Y in Sheet has Type.
cell_type(Module:Sheet, X, Y, Type) :-
( ground(cell(Sheet,X,Y))
-> cell_id(X,Y,Id),
once(Module:cell(Sheet, Id, _, Type, _, _, _))
; Module:cell(Sheet, Id, _, Type, _, _, _),
cell_id(X,Y,Id)
).
%% cell_formula(:Sheet, ?X, ?Y, ?Formula)
%
% True when cell X,Y in Sheet has Formula.
cell_formula(Module:Sheet, X, Y, Formula) :-
( ground(cell(Sheet,X,Y))
-> cell_id(X,Y,Id),
once(Module:cell(Sheet, Id, _, _, Formula, _, _))
; Module:cell(Sheet, Id, _, _, Formula, _, _),
cell_id(X,Y,Id)
),
Formula \== (-).
%% cell_eval(:Sheet, ?X, ?Y, ?Value)
%
% True when the formula of cell X,Y in Sheet evaluates to Value
cell_eval(Sheet, X, Y, Value) :-
cell_formula(Sheet, X, Y, Formula),
cell_type(Sheet, X, Y, Type),
Sheet = Module:_,
ods_eval_typed(Formula, Type, Value, Module).
%% cell_style(:Sheet, ?X, ?Y, ?Style)
%
% True when cell X,Y in Sheet has style property Style. See
% ods_style_property/2 for supported styles.
cell_style(Sheet, X, Y, Property) :-
nonvar(Property), !,
style_property_level(Property, Where),
cell_style(Where, Sheet, X, Y, Property).
cell_style(Sheet, X, Y, Property) :-
cell_style(_, Sheet, X, Y, Property).
cell_style(cell, Module:Sheet, X, Y, Property) :-
( ground(cell(Sheet,X,Y))
-> cell_id(X,Y,Id),
once(Module:cell(Sheet, Id, _, _, _, Style, _))
; Module:cell(Sheet, Id, _, _, _, Style, _),
cell_id(X,Y,Id)
),
ods_style_property(Module:Style, Property).
cell_style(column, Module:Sheet, Col, _, Property) :-
( ground(cell(Sheet,Col))
-> column_id(Col, X),
once(Module:col(Sheet, X, Style))
; Module:col(Sheet, Col, Style)
),
ods_style_property(Module:Style, Property).
column_id(Col, X) :-
( integer(Col)
-> X = Col
; upcase_atom(Col, Up),
column_name(X, Up)
).
style_property_level(column_width(_), column).
style_property_level(font_weight(_), cell).
style_property_level(font_name(_), cell).
style_property_level(font_size(_), cell).
style_property_level(cell_color(_), cell).
style_property_level(name(_), cell).
%% cell(:Sheet, ?X, ?Y, ?Value, ?Type, ?Formula, ?Style, ?Annotations)
%
% Query raw cells.
cell(M:Sheet, X, Y, Value, Type, Formula, Style, Annot) :-
( ground(cell(Sheet,X,Y))
-> cell_id(X,Y,Id),
once(M:cell(Sheet, Id, Value, Type, Formula, Style, Annot))
; M:cell(Sheet, Id, Value, Type, Formula, Style, Annot),
cell_id(X,Y,Id)
).
/*******************************
* EXPRESSION EVALUATION *
*******************************/
%% ods_eval(:Expression, -Value) is det.
%
% Evaluate an expression.
ods_eval(Module:Expression, Value) :-
ods_eval(Expression, Value, Module).
ods_eval(cell(Sheet,X,Y), Value, Module) :- !,
cell_value(Sheet,X,Y, _Type, Value, Module).
ods_eval(cell_range(Sheet, SX,SY, EX,EY), List, M) :- !,
( SX =:= EX
-> col_array(Sheet, SX, SY, EY, List, M)
; SY =:= EY
-> row_array(Sheet, SY, SX, EX, List, M)
; array(Sheet, SX,SY, EX,EY, List, M)
).
ods_eval(Ref1:Ref2, Value, Module) :- !,
eval_reference(Ref1, cell(S,SX,SY), Module),
eval_reference(Ref2, cell(S,EX,EY), Module),
ods_eval(cell_range(S,SX,SY,EX,EY), Value, Module).
ods_eval(ext(URL, Ref), Value, _Module) :- !,
( ods_ensure_loaded(URL, MExt)
-> ods_eval(Ref, Value, MExt)
; ods_warning(no_ext(URL)),
Value = #('REF!')
).
ods_eval(eval(Expr), Value, M) :- !,
eval_function(Expr, Value, M).
ods_eval(A+B, Value, M) :- !,
ods_eval_typed(A, number, VA, M),
ods_eval_typed(B, number, VB, M),
Value is VA+VB.
ods_eval(A-B, Value, M) :- !,