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| author | Hans Hagen <pragma@wxs.nl> | 2011-02-11 12:23:00 +0100 |
|---|---|---|
| committer | Hans Hagen <pragma@wxs.nl> | 2011-02-11 12:23:00 +0100 |
| commit | c1277fe938900d76727978e9140fbf6bea3e13bb (patch) | |
| tree | e389cf5e66a3fa0d362c92954842006942b1d32c /tex/context/base/typo-krn.lua | |
| parent | cf7217d37a358672fddc334ce519f59f3e69d0fd (diff) | |
| download | context-c1277fe938900d76727978e9140fbf6bea3e13bb.tar.gz | |
beta 2011.02.11 12:23
Diffstat (limited to 'tex/context/base/typo-krn.lua')
| -rw-r--r-- | tex/context/base/typo-krn.lua | 27 |
1 files changed, 24 insertions, 3 deletions
diff --git a/tex/context/base/typo-krn.lua b/tex/context/base/typo-krn.lua index 91849db85..9bf3cb1f5 100644 --- a/tex/context/base/typo-krn.lua +++ b/tex/context/base/typo-krn.lua @@ -75,8 +75,15 @@ local factors = kerns.factors local gluefactor = 4 -- assumes quad = .5 enspace +kerns.keepligature = false -- just for fun (todo: control setting with key/value) +kerns.keeptogether = false -- just for fun (todo: control setting with key/value) + +-- can be optimized .. the prev thing .. but hardly worth the effort + local function do_process(namespace,attribute,head,force) local start, done, lastfont = head, false, nil +local keepligature = kerns.keepligature +local keeptogether = kerns.keeptogether while start do -- faster to test for attr first local attr = force or has_attribute(start,attribute) @@ -89,6 +96,9 @@ local function do_process(namespace,attribute,head,force) lastfont = start.font local c = start.components if c then +if keepligature and keepligature(start) then + -- keep 'm +else c = do_process(namespace,attribute,c,attr) local s = start local p, n = s.prev, s.next @@ -106,8 +116,9 @@ local function do_process(namespace,attribute,head,force) start = c s.components = nil -- we now leak nodes ! ---~ free_node(s) + -- free_node(s) done = true +end end local prev = start.prev if prev then @@ -115,20 +126,30 @@ local function do_process(namespace,attribute,head,force) if not pid then -- nothing elseif pid == kern_code and prev.subtype == kerning_code then +if keeptogether and prev.prev.id == glyph_code and keeptogether(prev.prev,start) then -- we could also pass start + -- keep 'm +else prev.subtype = userkern_code prev.kern = prev.kern + quaddata[lastfont]*krn done = true +end elseif pid == glyph_code then if prev.font == lastfont then local prevchar, lastchar = prev.char, start.char +if keeptogether and keeptogether(prev,start) then + -- keep 'm +else local kerns = chardata[lastfont][prevchar].kerns local kern = kerns and kerns[lastchar] or 0 krn = kern + quaddata[lastfont]*krn + insert_node_before(head,start,new_kern(krn)) + done = true +end else krn = quaddata[lastfont]*krn + insert_node_before(head,start,new_kern(krn)) + done = true end - insert_node_before(head,start,new_kern(krn)) - done = true elseif pid == disc_code then -- a bit too complicated, we can best not copy and just calculate -- but we could have multiple glyphs involved so ... |