116 lines
3.7 KiB
Factor
116 lines
3.7 KiB
Factor
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! Copyright (C) 2004 Chris Double.
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!
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! Redistribution and use in source and binary forms, with or without
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! modification, are permitted provided that the following conditions are met:
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!
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! 1. Redistributions of source code must retain the above copyright notice,
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! this list of conditions and the following disclaimer.
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!
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! 2. Redistributions in binary form must reproduce the above copyright notice,
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! this list of conditions and the following disclaimer in the documentation
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! and/or other materials provided with the distribution.
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!
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! THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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! INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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! FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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! DEVELOPERS AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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! SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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! PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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! OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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! WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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! OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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! ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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!
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! An httpd responder that allows executing simple definitions.
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!
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IN: eval-responder
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USE: cont-html
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USE: cont-responder
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USE: cont-utils
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USE: stack
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USE: stdio
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USE: namespaces
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USE: streams
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USE: parser
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USE: lists
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USE: errors
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: display-eval-form ( url -- )
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#! Display the components for allowing entry of
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#! factor words to be evaluated.
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<form method= "post" action= form> [
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<textarea name= "eval" textarea> [
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"" write
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] </textarea>
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<input type= "submit" value= "Evaluate" input/>
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] </form> ;
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: display-stack ( list -- )
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#! Write out html to display 'list' as a stack.
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<table border= "1" table> [
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<tr> [ <th> [ "Callstack" write ] </th> ] </tr>
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[ <tr> [ <td> [ write ] </td> ] </tr> ] each
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] </table> ;
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: display-last-output ( string -- )
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#! Write out html to display the last output that
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#! the evaluator wrote.
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<table border= "1" table> [
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<tr> [
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<td> [ "Last Output" write ] </td>
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<td> [ write ] </td>
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] </tr>
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] </table> ;
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: get-expr-to-eval ( list string -- string )
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#! Show a page to the user requesting the form to be
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#! evaluated. It displays the current stack passed as 'list'
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#! and the last output given as 'string'.
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#! Return the form as a string.
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[
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<html> [
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<body> [
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display-eval-form
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display-last-output
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display-stack
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] </body>
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] </html>
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] show [
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2drop
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"eval" get
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] bind ;
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: do-eval ( list string -- list )
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#! Evaluate the expression in 'string' using 'list' as
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#! the datastack. Return the resulting stack as a list.
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parse unit append restack call unstack ;
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: do-eval-to-string ( list string -- list string )
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#! Evaluate expression using 'list' as the current callstack.
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#! All output should go to a string which is returned on the
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#! callstack along with the resulting datastack as a list.
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1024 <string-output-stream> dup >r [
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do-eval
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] with-stream r> stream>str ;
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: run-eval-requester ( list string -- )
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#! Enter a loop request an expression to
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#! evaluate, and displaying the results.
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#! 'list' will be the datastack initially
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#! user and 'string' the output from the
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#! last run.
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over >r get-expr-to-eval r> swap do-eval-to-string
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run-eval-requester ;
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: eval-responder ( list string -- )
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#! Run an eval-responder using the list as the
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#! initial callstack.
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[
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run-eval-requester
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] [
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show-message-page
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] catch
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eval-responder ;
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"eval" [ [ ] "None" eval-responder ] install-cont-responder
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