! :folding=indent:collapseFolds=1:

! $Id$
!
! Copyright (C) 2003, 2004 Slava Pestov.
! 
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! modification, are permitted provided that the following conditions are met:
! 
! 1. Redistributions of source code must retain the above copyright notice,
!    this list of conditions and the following disclaimer.
! 
! 2. Redistributions in binary form must reproduce the above copyright notice,
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IN: words
USE: generic
USE: inspector
USE: lists
USE: kernel
USE: namespaces
USE: prettyprint
USE: stdio
USE: strings
USE: unparser
USE: math
USE: hashtables

GENERIC: word-uses? ( of in -- ? )
M: word word-uses? 2drop f ;
M: compound word-uses? ( of in -- ? )
    2dup = [
        2drop f ! Don't say that a word uses itself
    ] [
        word-parameter tree-contains?
    ] ifte ;
M: generic word-uses? ( of in -- ? )
    "methods" word-property hash>alist tree-contains? ;

: usages-in-vocab ( of vocab -- usages )
    #! Push a list of all usages of a word in a vocabulary.
    words [
        dup compound? [
            dupd word-uses?
        ] [
            drop f ! Ignore words without a definition
        ] ifte
    ] subset nip ;

: usages-in-vocab. ( of vocab -- )
    #! List all usages of a word in a vocabulary.
    tuck usages-in-vocab dup [
        swap "IN: " write print [.]
    ] [
        2drop
    ] ifte ;

: usages. ( word -- )
    #! List all usages of a word in all vocabularies.
    vocabs [ usages-in-vocab. ] each-with ;

: vocab-apropos ( substring vocab -- list )
    #! Push a list of all words in a vocabulary whose names
    #! contain a string.
    words [ word-name dupd str-contains? ] subset nip ;

: vocab-apropos. ( substring vocab -- )
    #! List all words in a vocabulary that contain a string.
    tuck vocab-apropos dup [
        "IN: " write swap print [.]
    ] [
        2drop
    ] ifte ;

: vocab-completions ( substring vocab -- list )
    #! Used by jEdit plugin. Like vocab-apropos, but only
    #! matches at the start of a word name are considered.
    words [ word-name over ?str-head nip ] subset nip ;

: apropos. ( substring -- )
    #! List all words that contain a string.
    vocabs [ vocab-apropos. ] each-with ;

: in. ( -- )
    #! Print the vocabulary where new words are added in
    #! interactive parsers.
    "in" get print ;

: use. ( -- )
    #! Print the vocabulary search path for interactive parsers.
    "use" get . ;

: vocabs. ( -- )
    vocabs . ;

: words. ( vocab -- )
    words . ;