factor/basis/html/streams/streams.factor

182 lines
4.6 KiB
Factor

! Copyright (C) 2004, 2009 Slava Pestov.
! See http://factorcode.org/license.txt for BSD license.
USING: accessors kernel assocs io io.styles math math.order math.parser
sequences strings make words combinators macros xml.syntax html fry
destructors ;
IN: html.streams
GENERIC: url-of ( object -- url )
M: object url-of drop f ;
TUPLE: html-writer data last-div ;
<PRIVATE
! stream-nl after with-nesting or tabular-output is
! ignored, so that HTML stream output looks like
! UI pane output
: last-div? ( stream -- ? )
[ f ] change-last-div drop ;
: not-a-div ( stream -- stream )
f >>last-div ; inline
: a-div ( stream -- stream )
t >>last-div ; inline
: new-html-writer ( class -- html-writer )
new V{ } clone >>data ; inline
TUPLE: html-sub-stream < html-writer style parent ;
: new-html-sub-stream ( style stream class -- stream )
new-html-writer
swap >>parent
swap >>style ; inline
: end-sub-stream ( substream -- string style stream )
[ data>> ] [ style>> ] [ parent>> ] tri ;
: object-link-tag ( xml style -- xml )
presented swap at [ url-of [ simple-link ] when* ] when* ;
: href-link-tag ( xml style -- xml )
href swap at [ simple-link ] when* ;
: hex-color, ( color -- )
[ red>> ] [ green>> ] [ blue>> ] tri
[ 255 * >integer >hex 2 CHAR: 0 pad-head % ] tri@ ;
: fg-css, ( color -- )
"color: #" % hex-color, "; " % ;
: bg-css, ( color -- )
"background-color: #" % hex-color, "; " % ;
: style-css, ( flag -- )
dup
{ italic bold-italic } member?
"font-style: " % "italic" "normal" ? % "; " %
{ bold bold-italic } member?
"font-weight: " % "bold" "normal" ? % "; " % ;
: size-css, ( size -- )
"font-size: " % # "pt; " % ;
: font-css, ( font -- )
"font-family: " % % "; " % ;
MACRO: make-css ( pairs -- str )
[ '[ _ swap at [ _ execute ] when* ] ] { } assoc>map
'[ [ _ cleave ] "" make ] ;
: span-css-style ( style -- str )
{
{ foreground fg-css, }
{ background bg-css, }
{ font-name font-css, }
{ font-style style-css, }
{ font-size size-css, }
} make-css ;
: span-tag ( xml style -- xml )
span-css-style
[ swap [XML <span style=<->><-></span> XML] ] unless-empty ; inline
: emit-html ( quot stream -- )
dip data>> push ; inline
: format-html-span ( string style stream -- )
[ [ span-tag ] [ href-link-tag ] [ object-link-tag ] tri ]
emit-html ;
TUPLE: html-span-stream < html-sub-stream ;
M: html-span-stream dispose
end-sub-stream not-a-div format-html-span ;
: border-css, ( border -- )
"border: 1px solid #" % hex-color, "; " % ;
: padding-css, ( padding -- ) "padding: " % # "px; " % ;
CONSTANT: pre-css "white-space: pre; font-family: monospace;"
: div-css-style ( style -- str )
[
{
{ page-color bg-css, }
{ border-color border-css, }
{ border-width padding-css, }
} make-css
] [
wrap-margin swap at
[ pre-css append ] unless
] bi ;
: div-tag ( xml style -- xml' )
div-css-style
[ swap [XML <div style=<->><-></div> XML] ] unless-empty ;
: format-html-div ( string style stream -- )
[ [ div-tag ] [ object-link-tag ] bi ] emit-html ;
TUPLE: html-block-stream < html-sub-stream ;
M: html-block-stream dispose ( quot style stream -- )
end-sub-stream a-div format-html-div ;
: border-spacing-css, ( pair -- )
"padding: " % first2 max 2 /i # "px; " % ;
: table-style ( style -- str )
{
{ table-border border-css, }
{ table-gap border-spacing-css, }
} make-css
" border-collapse: collapse;" append ;
PRIVATE>
! Stream protocol
M: html-writer stream-flush drop ;
M: html-writer stream-write1
not-a-div [ 1string ] emit-html ;
M: html-writer stream-write
not-a-div [ ] emit-html ;
M: html-writer stream-format
format-html-span ;
M: html-writer stream-nl
dup last-div? [ drop ] [ [ [XML <br/> XML] ] emit-html ] if ;
M: html-writer make-span-stream
html-span-stream new-html-sub-stream ;
M: html-writer make-block-stream
html-block-stream new-html-sub-stream ;
M: html-writer make-cell-stream
html-sub-stream new-html-sub-stream ;
M: html-writer stream-write-table
a-div [
table-style swap [
[ data>> [XML <td valign="top" style=<->><-></td> XML] ] with map
[XML <tr><-></tr> XML]
] with map
[XML <table><-></table> XML]
] emit-html ;
M: html-writer dispose drop ;
: <html-writer> ( -- html-writer )
html-writer new-html-writer ;
: with-html-writer ( quot -- xml )
<html-writer> [ swap with-output-stream* ] keep data>> ; inline