! :folding=indent:collapseFolds=1: ! $Id$ ! ! Copyright (C) 2005 Slava Pestov. ! ! Redistribution and use in source and binary forms, with or without ! 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, ! this list of conditions and the following disclaimer in the documentation ! and/or other materials provided with the distribution. ! ! THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, ! INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND ! FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE ! DEVELOPERS AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ! SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, ! PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; ! OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, ! WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR ! OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ! ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. IN: line-editor USE: namespaces USE: strings USE: kernel USE: math SYMBOL: line-text SYMBOL: caret : line-clear ( -- ) #! Call this in the line editor scope. 0 caret set "" line-text set ; : ( -- editor ) [ line-clear ] extend ; : caret-insert ( str offset -- ) #! Call this in the line editor scope. caret get <= [ str-length caret [ + ] change ] [ drop ] ifte ; : line-insert ( str offset -- ) #! Call this in the line editor scope. 2dup caret-insert line-text get swap str/ swapd cat3 line-text set ; : insert-char ( ch -- ) #! Call this in the line editor scope. ch>str caret get line-insert ; : caret-remove ( offset length -- ) #! Call this in the line editor scope. 2dup + caret get <= [ nip caret [ swap - ] change ] [ caret get pick pick dupd + between? [ drop caret set ] [ 2drop ] ifte ] ifte ; : line-remove ( offset length -- ) #! Call this in the line editor scope. 2dup caret-remove dupd + line-text get str-tail >r line-text get str-head r> cat2 line-text set ; : backspace ( -- ) #! Call this in the line editor scope. caret get dup 0 = [ drop ] [ 1 - 1 line-remove ] ifte ; : left ( -- ) #! Call this in the line editor scope. caret [ 1 - 0 max ] change ; : right ( -- ) #! Call this in the line editor scope. caret [ 1 + line-text get str-length min ] change ;