1/* Part of SWI-Prolog odf-sheet pack 2 3 Author: Jan Wielemaker 4 E-mail: J.Wielemaker@vu.nl 5 WWW: http://www.swi-prolog.org/pack/list?p=odf-sheet 6 7 Copyright (c) 2012-2014, VU University of Amsterdam 8 All rights reserved. 9 10 Redistribution and use in source and binary forms, with or without 11 modification, are permitted provided that the following conditions are 12 met: 13 14 1. Redistributions of source code must retain the above copyright 15 notice, this list of conditions and the following disclaimer. 16 17 2. Redistributions in binary form must reproduce the above copyright 18 notice, this list of conditions and the following disclaimer in the 19 documentation and/or other materials provided with the distribution. 20 21 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 22 IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 23 TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 24 PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 25 HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 27 TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 28 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 29 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 30 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 31 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32*/ 33 34:- module(recognise, 35 [ anchor/2, % :DataSource, Type 36 unassigned_anchor/2, % :DataSource, ?Type 37 38 block/2, % :DataSource, Type 39 row/2, % :DataSource, Type 40 col/2, % :DataSource, Type 41 42 row/6, % :Sheet, SX,SY, EX,SY, Type 43 col/6, % :Sheet, SX,SY, EX,SY, Type 44 block/6, % :Sheet, SX,SY, EX,SY, Type 45 46 cell_class/1, % ?Class 47 cell_class/4, % :Sheet, ?SX, ?SY, ?Class 48 49 sheet_bb/2 % :Sheet, -DataSource 50% ds_join/2 % +DataSources, -Joined 51 ]). 52:- use_module(sheet). 53:- use_module(datasource). 54:- use_module(data). 55:- use_module(library(apply)). 56:- use_module(library(lists)). 57 58:- meta_predicate 59 anchor(, ), 60 unassigned_anchor(, ), 61 62 block(,), 63 row(,), 64 col(,), 65 66 block(,,,,,), 67 row(,,,,,), 68 col(,,,,,), 69 70 cell_class(, , , ), 71 72 sheet_bb(,).
The anchor/2 predicate is used to generate candidates for creating larger units of cells. For example, to generate all blocks of floats, use this:
?- anchor(D, float), once(block(D, float)).
94anchor(M:cell_range(Sheet, SX,SY, _EX,_EY), Type) :-
95 cell_class(M:Sheet, SX,SY, Type),
96 ( SX =:= 0
97 -> true
98 ; LX is SX-1,
99 cell_class(M:Sheet, LX,SY, TLeft), TLeft \== Type
100 ),
101 ( SY =:= 0
102 -> true
103 ; AY is SY-1,
104 cell_class(M:Sheet, SX,AY, TAbove), TAbove \== Type
105 ).109unassigned_anchor(M:cell_range(Sheet, SX,SY, _EX,_EY), Type) :- 110 MSheet = M:Sheet, 111 cell_class(MSheet, SX,SY, Type), 112 \+ assigned(MSheet, SX,SY), 113 ( SX =:= 0 114 -> true 115 ; LX is SX-1, 116 ( cell_class(MSheet, LX,SY, TLeft), TLeft \== Type 117 -> true 118 ; assigned(MSheet, LX,SY) 119 ) 120 ), 121 ( SY =:= 0 122 -> true 123 ; AY is SY-1, 124 ( cell_class(MSheet, SX,AY, TAbove), TAbove \== Type 125 -> true 126 ; assigned(MSheet, SX,AY) 127 ) 128 ). 129 130assigned(Sheet, X, Y) :- 131 cell_property(Sheet, X, Y, P), 132 assigned(P). 133 134assigned(table(_)). 135assigned(block(_)).
140block(M:cell_range(Sheet, SX,SY, EX,EY), Type) :- 141 block(M:Sheet, SX,SY, EX,EY, Type). 142 143row(M:cell_range(Sheet, SX,SY, EX,EY), Type) :- 144 row(M:Sheet, SX,SY, EX,EY, Type). 145 146col(M:cell_range(Sheet, SX,SY, EX,EY), Type) :- 147 col(M:Sheet, SX,SY, EX,EY, Type).
156block(Sheet, SX,SY, EX,EY, Type) :- 157 row(Sheet, SX,SY, EX,SY, Type), !, % dubious cut 158 block2(Sheet, SX,SY,EX,EY, Type). 159block(Sheet, SX,SY, EX,EY, Type) :- 160 col(Sheet, SX,SY, EX,EY, Type). 161 162block2(Sheet, SX,SY,EX,EY, Type) :- 163 ( Y2 is SY+1, 164 row(Sheet, SX,Y2, EX,Y2, Type), 165 block2(Sheet, SX,Y2,EX,EY, Type) 166 ; EY=SY 167 ). 168 169row(Sheet, SX,SY, EX,SY, Type) :- 170 cell_class(Sheet, SX,SY, Type), 171 X2 is SX+1, 172 row2(Sheet, X2,SY, EX,SY, Type). 173 174row2(Sheet, SX,SY, EX,SY, Type) :- 175 cell_class(Sheet, SX,SY, Type), 176 X2 is SX+1, 177 ( row2(Sheet, X2,SY, EX,SY, Type) 178 ; EX=SX 179 ). 180 181 182col(Sheet, SX,SY, SX,EY, Type) :- 183 cell_class(Sheet, SX,SY, Type), 184 Y2 is SY+1, 185 col2(Sheet, SX,Y2, SX,EY, Type). 186 187col2(Sheet, SX,SY, SX,EY, Type) :- 188 cell_class(Sheet, SX,SY, Type), 189 Y2 is SY+1, 190 ( col2(Sheet, SX,Y2, SX,EY, Type) 191 ; EY=SY 192 ). 193 194 195 /******************************* 196 * BLANK PARTS * 197 *******************************/ 198 199cell_class(float). 200cell_class(percentage). 201cell_class(string).
style(Style)214cell_class(Sheet, X,Y, Type) :- 215 ground(cell(Sheet,X,Y)), !, 216 ( cell_type(Sheet, X,Y, Type0), 217 Type0 \== no_type, 218 \+ cell_value(Sheet, X, Y, '') 219 -> Type = Type0 220 ; Type = empty 221 -> sheet_bb(Sheet, SheetDS), 222 ds_grow(SheetDS, 1, ExtendedDS), 223 ds_inside(ExtendedDS, X, Y), 224 empty_cell(Sheet, X,Y) 225 ). 226cell_class(Sheet, X,Y, Type) :- 227 Type == empty, !, 228 sheet_bb(Sheet, SheetDS), 229 ds_grow(SheetDS, 1, ExtendedDS), 230 ds_inside(ExtendedDS, X, Y), 231 empty_cell(Sheet, X,Y). 232cell_class(Sheet, X,Y, Type) :- 233 cell_type(Sheet, X,Y, Type). 234 235empty_cell(Sheet, X, Y) :- 236 cell_type(Sheet, X,Y, Type), !, 237 ( Type == string 238 -> cell_value(Sheet, X, Y, '') 239 ; Type == no_type 240 ). 241empty_cell(_,_,_).
250:- dynamic 251 sheet_bb_cache/6, 252 sheet_bb_cached/2. 253 254sheet_bb(M:Sheet, cell_range(Sheet,SX,SY,EX,EY)) :- 255 M:sheet(Sheet, _), 256 ( sheet_bb_cached(M, Sheet) 257 -> sheet_bb_cache(M, Sheet, SX,SY,EX,EY) 258 ; sheet_bb(M, Sheet, SX0,SY0,EX0,EY0) 259 -> assertz(sheet_bb_cached(M, Sheet)), 260 assertz(sheet_bb_cache(M, Sheet, SX0,SY0,EX0,EY0)), 261 SX=SX0, SY=SY0, EX=EX0,EY=EY0 262 ; assertz(sheet_bb_cached(M, Sheet)), % empty sheet 263 fail 264 ). 265 266sheet_bb(M, Sheet, SX,SY,EX,EY) :- 267 M:sheet(Sheet, _), 268 findall(X-Y, cell_exists(M:Sheet, X,Y), Pairs), 269 maplist(arg(1), Pairs, AtCol), 270 min_list(AtCol, SX), 271 max_list(AtCol, EX), 272 maplist(arg(2), Pairs, AtRow), 273 min_list(AtRow, SY), 274 max_list(AtRow, EY). 275 276cell_exists(M:Sheet,X,Y) :- 277 cell(M:Sheet, X,Y, _,_,_,_,_), 278 \+ empty_cell(M:Sheet, X, Y).
284%ds_join(List, List) :-
285% tbd.
Inference over spreadsheets