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Diffstat (limited to 'tex/context/modules/mkiv/s-fonts-kerns.mkiv')
| -rw-r--r-- | tex/context/modules/mkiv/s-fonts-kerns.mkiv | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/tex/context/modules/mkiv/s-fonts-kerns.mkiv b/tex/context/modules/mkiv/s-fonts-kerns.mkiv new file mode 100644 index 000000000..c3a5637c3 --- /dev/null +++ b/tex/context/modules/mkiv/s-fonts-kerns.mkiv @@ -0,0 +1,215 @@ +%D \module +%D [ file=s-fonts-kerns, +%D version=2018.02.20, % was s-fnt-40 (given the kin dof code < 2010) +%D title=\CONTEXT\ Style File, +%D subtitle=Show Fonts Kerns, +%D author=Hans Hagen, +%D date=\currentdate, +%D copyright={PRAGMA ADE \& \CONTEXT\ Development Team}] +%C +%C This module is part of the \CONTEXT\ macro||package and is +%C therefore copyrighted by \PRAGMA. See mreadme.pdf for +%C details. + +%D This is real old code but we keep it around for educational purposes. it's +%D not that efficient and we have better ways. +%D +%D \starttyping +%D \showfontkerns +%D \stoptyping +%D +%D This one shows all kerns so it's s bit different and as we use it in the +%D manual \unknown + +\startluacode + + local nodecodes = nodes.nodecodes + + local disc_code = nodecodes.disc + local kern_code = nodecodes.kern + local glyph_code = nodecodes.glyph + local hlist_code = nodecodes.hlist + + -- local function flatten(l) + -- while l do + -- local id = l.id + -- if id == disc_code then + -- local r = l.replace + -- if r then + -- local p = l.prev + -- local n = l.next + -- if n and p and n.id == glyph_code and p.id == glyph_code then + -- local s = node.slide(r) + -- p.next = r + -- n.prev = s + -- r.prev = p + -- s.next= n + -- l.replace = nil + -- node.free(l) + -- end + -- end + -- elseif id == hlist_code then + -- flatten(l.list) + -- end + -- l = l.next + -- end + -- end + + local function mark(l,c) + while l do + local id = l.id + if id == kern_code then + context.showkern(l.kern,c) + elseif id == disc_code then + mark(l.pre,2) + mark(l.post,3) + mark(l.replace,4) + elseif id == hlist_code then + mark(l.list,c) + end + l = l.next + end + end + + local function collect(l) + local m = { } + while l do + local id = l.id + if id == hlist_code then + m[#m+1] = l + end + l = l.next + end + return m + end + + local function inject(l,m,i) + local x = l + i = i or 0 + while l do + local id = l.id + if id == kern_code then + i = i + 1 + node.insert_before(x,l,node.copy(m[i])) + elseif id == disc_code then + i = inject(l.pre,m,i) + i = inject(l.post,m,i) + i = inject(l.replace,m,i) + elseif id == hlist_code then + i = inject(l.list,m,i) + end + l = l.next + end + return i + end + + moduledata.fonts = moduledata.fonts or { } + moduledata.fonts.kerns = moduledata.fonts.kerns or { } + + function moduledata.fonts.kerns._show_(n) + inject(tex.box[n].list,collect(tex.box[6].list)) + end + + function moduledata.fonts.kerns.show(n) + context("\\bgroup") + context("\\setbox6\\vbox\\bgroup\\forgetall") + -- flatten(tex.box[n].list) + mark(tex.box[n].list,1) + context("\\egroup") + context("\\ctxlua{moduledata.fonts.kerns._show_('%s')}",n) + context("\\egroup") + end + +\stopluacode + +\setupcolors[state=start] + +\definefont[VerySmall][Mono at 4pt] + +\definecolor[kern:0][s=.5] +\definecolor[kern:1][b=.5] +\definecolor[kern:2][r=.5] +\definecolor[kern:3][g=.5] +\definecolor[kern:4][r=.5,g=.5] + +\def\showkernwidthfactor{1} + +\newconditional\showkernstate +\settrue \showexplicitkerns + +\unexpanded\def\showkern#1#2% + {\begingroup + \dontcomplain + \setbox\scratchbox\hbox to \zeropoint \bgroup + \ifcase#2\or + \ifconditional\showkernstate + \color[kern:0]{\dovlwdhtdp\showkernwidthfactor{0.75}{0.5}}% + \global\setfalse\showkernstate + \raise.8\strutht + \else + \color[kern:0]{\dovlwdhtdp\showkernwidthfactor{1.05}{0.5}}% + \global\settrue\showkernstate + \raise1.1\strutht + \fi + \else\ifconditional\showexplicitkerns % if other kerns + \color[kern:0]{\dovlwdhtdp\showkernwidthfactor{0.75}{0.5}}% + \lower1.2\strutdp + \fi\fi + \hbox to 0pt{\hss\VerySmall\color[kern:#2]{\expandafter\withoutpt\the\dimexpr#1sp}\hss}% + \egroup + \smashbox\scratchbox + \box\scratchbox + \endgroup + \par} + +\newbox\KernBox + +\unexpanded\def\ShowKerns#1% + {\global\setfalse + \showkernstate\ctxlua{moduledata.fonts.kerns.show("#1")}} + +\unexpanded\def\ShowKernedVBox#1% + {\global\setfalse\showkernstate + \setbox\KernBox\vbox{#1}% + \ShowKerns{KernBox}% + \unvbox\KernBox} + +\unexpanded\def\ShowKernedHBox#1% + {\global\setfalse\showkernstate + \setbox\KernBox\hbox{#1}% + \ShowKerns{KernBox}% + \unhbox\KernBox} + +\continueifinputfile{s-fonts-kerns.mkiv} + +\setupinterlinespace[1.5] % \setfalse\showexplicitkerns + +\definefontfeature[default][default][mode=node] % ,script=latn] + +\starttext + +% \enabletrackers[otf.kerns] + +\setuplayout[width=middle,height=middle] + +\usetypescript[modern] \setupbodyfont[modern] +\setbox\KernBox\vbox{\input knuth } \ShowKerns{KernBox} \copy\KernBox \blank + +\ShowKernedHBox{Very often glyphs get very small spaces inserted horizontally.} + +\usetypescript[cambria] \setupbodyfont[cambria] +\setbox\KernBox\vbox{\input knuth } \ShowKerns{KernBox} \copy\KernBox \blank + +\ShowKernedHBox{Very often glyphs get very small spaces inserted horizontally.} + +\usetypescript[palatino] \setupbodyfont[palatino] +\setbox\KernBox\vbox{\input knuth } \ShowKerns{KernBox} \copy\KernBox \blank + +\ShowKernedHBox{Very often glyphs get very small spaces inserted horizontally.} + +\usetypescript[dejavu] \setupbodyfont[dejavu] +\setbox\KernBox\vbox{\input knuth } \ShowKerns{KernBox} \copy\KernBox \blank + +\ShowKernedHBox{Very often glyphs get very small spaces inserted horizontally.} + +\stoptext |