mirror of
https://git.lyx.org/repos/lyx.git
synced 2024-11-25 19:07:45 +00:00
46ee486bda
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@9138 a592a061-630c-0410-9148-cb99ea01b6c8
208 lines
6.7 KiB
Prolog
208 lines
6.7 KiB
Prolog
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
% Prolog
|
|
%
|
|
% Shortcut generator v1.0
|
|
%
|
|
% This program is known to work with SWI-Prolog version 2.9.5, which you
|
|
% can find at
|
|
%
|
|
% http://www.swi.psy.uva.nl/usr/jan/SWI-Prolog.html
|
|
%
|
|
% Purpose: to generate shortcuts for labels in menus and dialogs that are
|
|
% guaranteed to be unique within a set of labels. The shortcuts are
|
|
% generated in a prioritized manner, such that characters at the beginning
|
|
% of words are preferred to characters in the middle of words.
|
|
%
|
|
% You might find this progam useful if you are translating LyX.
|
|
%
|
|
% Don't use this file in the development/tools-directory; copy it
|
|
% somewhere out of the LyX-distribution tree, unless you're improving
|
|
% the tool itself. The input is to be hard-coded into the file and that
|
|
% may cause unnecessary garbage to appear in any patch you're putting
|
|
% together.
|
|
%
|
|
% The labels are supposed to be entered at "LABELS" below,
|
|
% and you get one solution (hopefully) with "go.".
|
|
% If there are no solutions, the Prolog-interpretator will reply with a
|
|
% "No."
|
|
%
|
|
% You can get all candidate solutions with "all.", but this requires
|
|
% lots of memory.
|
|
%
|
|
% You can inspect the correspondance between the original strings and
|
|
% the prioritized ones with "inspect.".
|
|
%
|
|
% I have no idea what the big O for the algorithm is, but I suspect it's
|
|
% rather steep.
|
|
% Asger speculates that the algorithm is O(n^m), where n is the cardinality
|
|
% of the candidate sets, while m is the number of sets. Since we do an
|
|
% exhausitive search, this has to be the case.
|
|
|
|
% Predicates:
|
|
|
|
% print out one solution, i.e. a set of label/shortcut's
|
|
% writef/2 may be specific for SWI-prolog
|
|
show_one_alternative([]).
|
|
show_one_alternative([L/_/C|Rest]):-
|
|
writef('%s|#%n\n',[L,C]),
|
|
show_one_alternative(Rest).
|
|
|
|
% printout predicate for "all."
|
|
show_solutions([]).
|
|
show_solutions([H|T]):-
|
|
write('-----------\n'),
|
|
show_one_alternative(H),
|
|
show_solutions(T).
|
|
|
|
% print out correspondance between original strings and prioritized ones.
|
|
show_priority([]).
|
|
show_priority([L/P/_|Rest]):-
|
|
writef('%s|%n\n',[L,P]),
|
|
show_priority(Rest).
|
|
|
|
% character is from a set of allowed characters.
|
|
% "AZaz09"=[65, 90, 97, 122, 48, 57]
|
|
allowed_char(C):-
|
|
C >= 97, C =< 122. % a-z
|
|
allowed_char(C):-
|
|
C >= 65, C =< 90. % A-Z
|
|
allowed_char(C):-
|
|
C >= 48, C =< 57. % 0-9
|
|
|
|
% turn lowercase to uppercase; alt-<key> is case insensitive
|
|
uppercase(L,U):-
|
|
(L >= 97, L =< 122) -> U is L - 32;
|
|
U is L.
|
|
|
|
% possible_char/2: Gets all characters in label, one after one.
|
|
possible_char(_/Label,Char):-
|
|
member(Char,Label). % the character is part of the label
|
|
|
|
% prepare_labels/2: Prepares all labels. Constructs a new list of pairs
|
|
% where the original string is coupled with the prepared string.
|
|
prepare_labels([], []).
|
|
prepare_labels([H1|T1], [H1/H2|T2]):-
|
|
prepare_string(H1, H2),
|
|
prepare_labels(T1, T2).
|
|
|
|
% prepare_string/2: Prepares a string by removing duplicate characters,
|
|
% prioritizing initials letters, removing illegal characters and turning
|
|
% lowercase to uppercase characters.
|
|
prepare_string(Label,Result):-
|
|
string_to_list(Label,List1), % make a list of the string
|
|
prioritize(List1, List2), % Prioritize string
|
|
filter_chars(List2, List3), % Filter out unwanted chars
|
|
unique(List3, Result). % Remove duplicates
|
|
|
|
% prioritize/2: This predicate rearranges a list, such that
|
|
% chars at the beginning of words are put first in the list.
|
|
% i.e. prioritize("Foo bar", "Fboo ar")" is true.
|
|
prioritize(L1,L2):-
|
|
initial_chars(L1, I), % Find all initial characters
|
|
subtract(L1, I, Rest), % and the others
|
|
append(I, Rest, L2). % and we have the result.
|
|
|
|
% initial_chars/2: Returns a list of characters that appear at the beginning
|
|
% of words. i.e. initial_chars("Foo bar", "Fb") is true.
|
|
initial_chars([],[]).
|
|
initial_chars([A|T1], [A|T3]):-
|
|
rest_after_space(T1, T2), % Return rest of list after space
|
|
initial_chars(T2, T3).
|
|
|
|
% rest_after_space/2: Returns the list after the first space.
|
|
% i.e. "rest_after_space("Foo bar", "bar") is true.
|
|
rest_after_space([], []).
|
|
rest_after_space([32, H1|T1], [H1|T1]):- !.
|
|
rest_after_space([_|T1], T2):-
|
|
rest_after_space(T1, T2).
|
|
|
|
% filterchars/2: Filter outs non-allowed characters from list, and turns
|
|
% lowercase to uppercase.
|
|
filter_chars([], []).
|
|
filter_chars([H|T1], [C|T2]):-
|
|
allowed_char(H), !, uppercase(H, C),
|
|
filter_chars(T1, T2).
|
|
filter_chars([_|T1], T2):-
|
|
filter_chars(T1, T2).
|
|
|
|
% unique/2: This predicate removes duplicate characters without reordering.
|
|
% i.e. unique("Foo bar", "Fo bar") is true.
|
|
unique([], []).
|
|
unique([H|T1], [H|T3]):-
|
|
delete(T1, H, T2), % Remove duplicates.
|
|
unique(T2,T3).
|
|
|
|
% working_shortcuts/2 instantiates Char in the first argument for a whole
|
|
% menu/dialog.
|
|
working_shortcuts([],_). % end of the list
|
|
|
|
working_shortcuts([Label/Char|Rest],Used):-
|
|
possible_char(Label,Char), % i.e. part of the label string
|
|
\+member(Char,Used), % not used by any other shortcut
|
|
working_shortcuts(Rest,[Char|Used]). % and all the other labels have
|
|
% shortcuts
|
|
% The prolog motor will backtrack up and down the list of labels
|
|
% until it finds a set with unique characters for each label
|
|
|
|
|
|
% Label strings goes here.
|
|
% Just cut&paste the strings from the LyX-source, and remove any
|
|
% control sequences for menus. We could add a couple of predicates to scan
|
|
% a file, but re-consulting this file takes only a fraction of a second
|
|
% so I didn't bother to add a fancy user interface here. The solution is
|
|
% printed like <label> '|#' <key>, allthough this isn't nessecarily useful,
|
|
% for menus for instance.
|
|
%
|
|
% The characters are picked with priority from left to right within
|
|
% strings, and the labels are listed in falling priority.
|
|
% If you want a certain label to have a certain shortcut, try adding that
|
|
% character in front of the string (like 'Exit' -> 'xExit') and move it
|
|
% higher up in the list.
|
|
% If this doesn't work, replace the string with only that character
|
|
% ('Exit' -> 'x'). If you get a "No." then, you lose.
|
|
% Use "inspect." to inspect the resulting priotized strings.
|
|
|
|
% LABELS
|
|
lab(Labels):-
|
|
Strings = [
|
|
"New...",
|
|
"New from template...",
|
|
"Open...",
|
|
"Close",
|
|
"Save",
|
|
"Save As...",
|
|
"Revert to saved",
|
|
"View dvi",
|
|
"View PostScript",
|
|
"Update dvi",
|
|
"Update PostScript",
|
|
"Print...",
|
|
"Fax...",
|
|
"Export",
|
|
"Exit"
|
|
% NB, no comma on the last one. Easy to forget.
|
|
],
|
|
prepare_labels(Strings, Str),
|
|
bagof(L/_,member(L,Str),Labels).
|
|
|
|
% Inspect mapping between original string and prioritized ones.
|
|
inspect:-
|
|
lab(Labels),
|
|
show_priority(Labels).
|
|
|
|
% Find ALL solutions (they are often legion - don't bother ;)
|
|
all:- % May (probably, on large dialogs) run out on memory.
|
|
lab(Labels),
|
|
setof(Labels,working_shortcuts(Labels,[]),Solutions),
|
|
show_solutions(Solutions).
|
|
|
|
% Find one solution
|
|
one:-
|
|
lab(Labels),
|
|
working_shortcuts(Labels,[]),
|
|
show_one_alternative(Labels).
|
|
|
|
% Entry point.
|
|
go:-
|
|
one.
|