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authorPhilipp Gesang <phg@phi-gamma.net>2015-11-07 00:43:32 +0100
committerPhilipp Gesang <phg@phi-gamma.net>2015-11-07 00:43:32 +0100
commit8840df3b2f5d080cf74616610a6146068e99d985 (patch)
tree1f32f15375d91aaa64df357829fdb0233a210457 /src/luaotfload-colors.lua
parent65c8b21ab3bf907357b203a7b5c6fb5b0a971cea (diff)
parentc7967b7a69bc5cf4e0c2e38b4e552c2587a7502d (diff)
downloadluaotfload-8840df3b2f5d080cf74616610a6146068e99d985.tar.gz
Merge pull request #4 from dohyunkim/display_math
[colors] support displayed math
Diffstat (limited to 'src/luaotfload-colors.lua')
-rw-r--r--src/luaotfload-colors.lua52
1 files changed, 31 insertions, 21 deletions
diff --git a/src/luaotfload-colors.lua b/src/luaotfload-colors.lua
index a0b80bd..98549c8 100644
--- a/src/luaotfload-colors.lua
+++ b/src/luaotfload-colors.lua
@@ -158,6 +158,7 @@ local whatsit_t = nodetype("whatsit")
local disc_t = nodetype("disc")
local pdfliteral_t = node.subtype("pdf_literal")
local colorstack_t = node.subtype("pdf_colorstack")
+local mlist_to_hlist = node.mlist_to_hlist
local color_callback
local color_attr = luatexbase.new_attribute("luaotfload_color_attribute")
@@ -196,8 +197,6 @@ local get_font_color = function (font_id)
return font_color
end
-local cnt = 0
-
--[[doc--
While the second argument and second returned value are apparently
always nil when the function is called, they temporarily take string
@@ -206,26 +205,24 @@ values during the node list traversal.
--- (node * (string | nil)) -> (node * (string | nil))
local node_colorize
-node_colorize = function (head, current_color)
+node_colorize = function (head, toplevel, current_color)
local n = head
while n do
local n_id = getid(n)
if n_id == hlist_t or n_id == vlist_t then
- cnt = cnt + 1
local n_list = getlist(n)
if getattribute(n_list, color_attr) then
if current_color then
head, n, current_color = color_whatsit(head, n, current_color, false)
end
else
- n_list, current_color = node_colorize(n_list, current_color)
+ n_list, current_color = node_colorize(n_list, false, current_color)
if current_color and getsubtype(n) == 1 then -- created by linebreak
n_list, _, current_color = color_whatsit(n_list, nodetail(n_list), current_color, false, true)
end
setfield(n, "head", n_list)
end
- cnt = cnt - 1
elseif n_id == glyph_t then
--- colorization is restricted to those fonts
@@ -269,7 +266,7 @@ node_colorize = function (head, current_color)
n = getnext(n)
end
- if cnt == 0 and current_color then
+ if toplevel and current_color then
head, _, current_color = color_whatsit(head, nodetail(head), current_color, false, true)
end
@@ -280,7 +277,7 @@ end
--- node -> node
local color_handler = function (head)
head = todirect(head)
- head = node_colorize(head)
+ head = node_colorize(head, true)
head = tonode(head)
-- now append our page resources
@@ -317,6 +314,8 @@ local color_handler = function (head)
end
local color_callback_activated = 0
+local add_to_callback = luatexbase.add_to_callback
+local priority_in_callback = luatexbase.priority_in_callback
--- unit -> unit
add_color_callback = function ( )
@@ -326,19 +325,30 @@ add_color_callback = function ( )
end
if color_callback_activated == 0 then
- luatexbase.add_to_callback(color_callback,
- color_handler,
- "luaotfload.color_handler")
- luatexbase.add_to_callback("hpack_filter",
- function (head, groupcode)
- if groupcode == "hbox" or
- groupcode == "adjusted_hbox" or
- groupcode == "align_set" then
- head = color_handler(head)
- end
- return head
- end,
- "luaotfload.color_handler")
+ add_to_callback(color_callback,
+ color_handler,
+ "luaotfload.color_handler")
+ add_to_callback("hpack_filter",
+ function (head, groupcode)
+ if groupcode == "hbox" or
+ groupcode == "adjusted_hbox" or
+ groupcode == "align_set" then
+ head = color_handler(head)
+ end
+ return head
+ end,
+ "luaotfload.color_handler")
+ add_to_callback("mlist_to_hlist",
+ function (head, display_type, need_penalties)
+ if priority_in_callback("mlist_to_hlist","luaotfload.color_handler") == 1 then
+ head = mlist_to_hlist(head, display_type, need_penalties)
+ end
+ if display_type == "text" then
+ return head
+ end
+ return color_handler(head)
+ end,
+ "luaotfload.color_handler")
color_callback_activated = 1
end
end