diff options
Diffstat (limited to 'tex/context/base/mkiv/lxml-css.lua')
| -rw-r--r-- | tex/context/base/mkiv/lxml-css.lua | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/tex/context/base/mkiv/lxml-css.lua b/tex/context/base/mkiv/lxml-css.lua new file mode 100644 index 000000000..fa921b24f --- /dev/null +++ b/tex/context/base/mkiv/lxml-css.lua @@ -0,0 +1,171 @@ +if not modules then modules = { } end modules ['lxml-css'] = { + version = 1.001, + comment = "companion to lxml-css.mkiv", + author = "Hans Hagen, PRAGMA-ADE, Hasselt NL", + copyright = "PRAGMA ADE / ConTeXt Development Team", + license = "see context related readme files" +} + +local tonumber, rawset = tonumber, rawset +local lower, format = string.lower, string.format +local P, S, C, R, Cb, Cg, Carg, Ct, Cc, Cf = lpeg.P, lpeg.S, lpeg.C, lpeg.R, lpeg.Cb, lpeg.Cg, lpeg.Carg, lpeg.Ct, lpeg.Cc, lpeg.Cf +local lpegmatch, lpegpatterns = lpeg.match, lpeg.patterns + +xml.css = xml.css or { } +local css = xml.css + +if not number.dimenfactors then + require("util-dim.lua") +end + +local dimenfactors = number.dimenfactors +local bpf = 1/dimenfactors.bp +local cmf = 1/dimenfactors.cm +local mmf = 1/dimenfactors.mm +local inf = 1/dimenfactors["in"] + +local percentage, exheight, emwidth, pixels + +if tex then + + local exheights = fonts.hashes.exheights + local emwidths = fonts.hashes.emwidths + local texget = tex.get + + percentage = function(s,pcf) return tonumber(s) * (pcf or texget("hsize")) end + exheight = function(s,exf) return tonumber(s) * (exf or exheights[true]) end + emwidth = function(s,emf) return tonumber(s) * (emf or emwidths[true]) end + pixels = function(s,pxf) return tonumber(s) * (pxf or emwidths[true]/300) end + +else + + local function generic(s,unit) return tonumber(s) * unit end + + percentage = generic + exheight = generic + emwidth = generic + pixels = generic + +end + +local validdimen = Cg(lpegpatterns.number,'a') * ( + Cb('a') * P("pt") / function(s) return tonumber(s) * bpf end + + Cb('a') * P("cm") / function(s) return tonumber(s) * cmf end + + Cb('a') * P("mm") / function(s) return tonumber(s) * mmf end + + Cb('a') * P("in") / function(s) return tonumber(s) * inf end + + Cb('a') * P("px") * Carg(1) / pixels + + Cb('a') * P("%") * Carg(2) / percentage + + Cb('a') * P("ex") * Carg(3) / exheight + + Cb('a') * P("em") * Carg(4) / emwidth + + Cb('a') * Carg(1) / pixels + ) + +local pattern = (validdimen * lpegpatterns.whitespace^0)^1 + +-- todo: default if "" + +local function dimension(str,pixel,percent,exheight,emwidth) + return (lpegmatch(pattern,str,1,pixel,percent,exheight,emwidth)) +end + +local function padding(str,pixel,percent,exheight,emwidth) + local top, bottom, left, right = lpegmatch(pattern,str,1,pixel,percent,exheight,emwidth) + if not bottom then + bottom, left, right = top, top, top + elseif not left then + bottom, left, right = top, bottom, bottom + elseif not right then + bottom, left, right = left, bottom, bottom + end + return top, bottom, left, right +end + +css.dimension = dimension +css.padding = padding + +-- local hsize = 655360*100 +-- local exheight = 65536*4 +-- local emwidth = 65536*10 +-- local pixel = emwidth/100 +-- +-- print(padding("10px",pixel,hsize,exheight,emwidth)) +-- print(padding("10px 20px",pixel,hsize,exheight,emwidth)) +-- print(padding("10px 20px 30px",pixel,hsize,exheight,emwidth)) +-- print(padding("10px 20px 30px 40px",pixel,hsize,exheight,emwidth)) +-- +-- print(padding("10%",pixel,hsize,exheight,emwidth)) +-- print(padding("10% 20%",pixel,hsize,exheight,emwidth)) +-- print(padding("10% 20% 30%",pixel,hsize,exheight,emwidth)) +-- print(padding("10% 20% 30% 40%",pixel,hsize,exheight,emwidth)) +-- +-- print(padding("10",pixel,hsize,exheight,emwidth)) +-- print(padding("10 20",pixel,hsize,exheight,emwidth)) +-- print(padding("10 20 30",pixel,hsize,exheight,emwidth)) +-- print(padding("10 20 30 40",pixel,hsize,exheight,emwidth)) +-- +-- print(padding("10pt",pixel,hsize,exheight,emwidth)) +-- print(padding("10pt 20pt",pixel,hsize,exheight,emwidth)) +-- print(padding("10pt 20pt 30pt",pixel,hsize,exheight,emwidth)) +-- print(padding("10pt 20pt 30pt 40pt",pixel,hsize,exheight,emwidth)) + +-- print(padding("0",pixel,hsize,exheight,emwidth)) + +-- local currentfont = font.current +-- local texget = tex.get +-- local hashes = fonts.hashes +-- local quads = hashes.quads +-- local xheights = hashes.xheights +-- +-- local function padding(str) +-- local font = currentfont() +-- local exheight = xheights[font] +-- local emwidth = quads[font] +-- local hsize = texget("hsize")/100 +-- local pixel = emwidth/100 +-- return padding(str,pixel,hsize,exheight,emwidth) +-- end +-- +-- function css.simplepadding(str) +-- context("%ssp",padding(str,pixel,hsize,exheight,emwidth)) +-- end + +local pattern = Cf( Ct("") * ( + Cg( + Cc("style") * ( + C("italic") + + C("oblique") + + C("slanted") / "oblique" + ) + + Cc("variant") * ( + (C("smallcaps") + C("caps")) / "small-caps" + ) + + Cc("weight") * + C("bold") + + Cc("family") * ( + (C("mono") + C("type")) / "monospace" -- just ignore the "space(d)" + + (C("sansserif") + C("sans")) / "sans-serif" -- match before serif + + C("serif") + ) + ) +--+ P("\\") * ( +-- P("bf") * ( Cg ( Cc("weight") * Cc("bold") ) ) +-- + P("bi") * ( Cg ( Cc("weight") * Cc("bold") ) +-- * Cg ( Cc("style") * Cc("italic") ) ) +-- + P("bs") * ( Cg ( Cc("weight") * Cc("bold") ) +-- * Cg ( Cc("style") * Cc("oblique") ) ) +-- + P("it") * ( Cg ( Cc("style") * Cc("italic") ) ) +-- + P("sl") * ( Cg ( Cc("style") * Cc("oblique") ) ) +-- + P("sc") * ( Cg ( Cc("variant") * Cc("small-caps") ) ) +-- + P("tt") * ( Cg ( Cc("family") * Cc("monospace") ) ) +--) + + P(1) +)^0 , rawset) + +function css.fontspecification(str) + return str and lpegmatch(pattern,lower(str)) +end + +function css.colorspecification(str) + local c = str and attributes.colors.values[tonumber(str)] + return c and format("rgb(%s%%,%s%%,%s%%)",c[3]*100,c[4]*100,c[5]*100) +end |