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authorPhilipp Gesang <phg42.2a@gmail.com>2014-12-14 12:29:58 +0100
committerPhilipp Gesang <phg42.2a@gmail.com>2014-12-14 12:29:58 +0100
commitc029158f450cd96f71db2f2a4da72a5c946089c0 (patch)
tree1c5d30d6853f6deb57cc9818b8739106a2d5e03f /src/fontloader/misc/fontloader-fonts-cbk.lua
parentea148be27d5a79fd11759856e0ab4033f328ce5a (diff)
parentca673f7b14af906606a188fd98978d3501842f63 (diff)
downloadluaotfload-c029158f450cd96f71db2f2a4da72a5c946089c0.tar.gz
Merge pull request #260 from phi-gamma/master
add import helper, new directory layout, revised letterspacing, fontloader gone nuts
Diffstat (limited to 'src/fontloader/misc/fontloader-fonts-cbk.lua')
-rw-r--r--src/fontloader/misc/fontloader-fonts-cbk.lua128
1 files changed, 128 insertions, 0 deletions
diff --git a/src/fontloader/misc/fontloader-fonts-cbk.lua b/src/fontloader/misc/fontloader-fonts-cbk.lua
new file mode 100644
index 0000000..965b968
--- /dev/null
+++ b/src/fontloader/misc/fontloader-fonts-cbk.lua
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+if not modules then modules = { } end modules ['luatex-fonts-cbk'] = {
+ version = 1.001,
+ comment = "companion to luatex-*.tex",
+ author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+ copyright = "PRAGMA ADE / ConTeXt Development Team",
+ license = "see context related readme files"
+}
+
+if context then
+ texio.write_nl("fatal error: this module is not for context")
+ os.exit()
+end
+
+local fonts = fonts
+local nodes = nodes
+
+-- Fonts: (might move to node-gef.lua)
+
+local traverse_id = node.traverse_id
+local glyph_code = nodes.nodecodes.glyph
+local disc_code = nodes.nodecodes.disc
+
+-- from now on we apply ligaturing and kerning here because it might interfere with complex
+-- opentype discretionary handling where the base ligature pass expect some weird extra
+-- pointers (which then confuse the tail slider that has some checking built in)
+
+local ligaturing = node.ligaturing
+local kerning = node.kerning
+
+local basepass = true
+
+function nodes.handlers.setbasepass(v)
+ basepass = v
+end
+
+function nodes.handlers.characters(head)
+ local fontdata = fonts.hashes.identifiers
+ if fontdata then
+ local usedfonts = { }
+ local basefonts = { }
+ local prevfont = nil
+ local basefont = nil
+ for n in traverse_id(glyph_code,head) do
+ local font = n.font
+ if font ~= prevfont then
+ if basefont then
+ basefont[2] = n.prev
+ end
+ prevfont = font
+ local used = usedfonts[font]
+ if not used then
+ local tfmdata = fontdata[font] --
+ if tfmdata then
+ local shared = tfmdata.shared -- we need to check shared, only when same features
+ if shared then
+ local processors = shared.processes
+ if processors and #processors > 0 then
+ usedfonts[font] = processors
+ elseif basepass then
+ basefont = { n, nil }
+ basefonts[#basefonts+1] = basefont
+ end
+ end
+ end
+ end
+ end
+ end
+ for d in traverse_id(disc_code,head) do
+ local r = d.replace
+ if r then
+ for n in traverse_id(glyph_code,r) do
+ local font = n.font
+ if font ~= prevfont then
+ prevfont = font
+ local used = usedfonts[font]
+ if not used then
+ local tfmdata = fontdata[font] --
+ if tfmdata then
+ local shared = tfmdata.shared -- we need to check shared, only when same features
+ if shared then
+ local processors = shared.processes
+ if processors and #processors > 0 then
+ usedfonts[font] = processors
+ end
+ end
+ end
+ end
+ end
+ end
+ end
+ end
+ if next(usedfonts) then
+ for font, processors in next, usedfonts do
+ for i=1,#processors do
+ head = processors[i](head,font,0) or head
+ end
+ end
+ end
+ if basepass and #basefonts > 0 then
+ for i=1,#basefonts do
+ local range = basefonts[i]
+ local start, stop = range[1], range[2]
+ if stop then
+ ligaturing(start,stop)
+ kerning(start,stop)
+ else
+ ligaturing(start)
+ kerning(start)
+ end
+ end
+ end
+ return head, true
+ else
+ return head, false
+ end
+end
+
+function nodes.simple_font_handler(head)
+ -- lang.hyphenate(head)
+ head = nodes.handlers.characters(head)
+ nodes.injections.handler(head)
+ if not basepass then
+ head = ligaturing(head)
+ head = kerning(head)
+ end
+ nodes.handlers.protectglyphs(head)
+ return head
+end