1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
|
-- Copyright 2012 Patrick Gundlach, patrick@gundla.ch
-- released under the "MIT license" (see footer of this file)
-- Public repository: https://github.com/pgundlach/lvdebug (issues/pull requests,...)
module(...,package.seeall)
local factor = 65782 -- big points vs. TeX points
local rule_width = 0.1
local function draw_pagebox(head,parent)
while head do
if head.id == 0 or head.id == 1 then -- hbox / vbox
local wd = head.width / factor - rule_width
local ht = (head.height + head.depth) / factor - rule_width
local dp = head.depth / factor - rule_width / 2
draw_pagebox(head.list,head)
local wbox = node.new("whatsit","pdf_literal")
if head.id == 0 then -- hbox
wbox.data = string.format("q 0.5 G %g w %g %g %g %g re s Q", rule_width, -rule_width / 2, -dp, wd, ht)
else
wbox.data = string.format("q 0.1 G %g w %g %g %g %g re s Q", rule_width, -rule_width / 2, 0, wd, -ht)
end
wbox.mode = 0
head.list = node.insert_before(head.list,head.list,wbox)
elseif head.id == 10 then -- glue
local wd = head.spec.width
local color = "0.5 G"
if parent.glue_sign == 1 and parent.glue_order == head.spec.stretch_order then
wd = wd + parent.glue_set * head.spec.stretch
color = "0 0 1 RG"
elseif parent.glue_sign == 2 and parent.glue_order == head.spec.shrink_order then
wd = wd - parent.glue_set * head.spec.shrink
color = "1 0 1 RG"
end
local wbox = node.new("whatsit","pdf_literal")
if parent.id == 0 then --hlist
wbox.data = string.format("q %s [0.2] 0 d 0.5 w 0 0 m %g 0 l s Q",color,wd / factor)
else -- vlist
wbox.data = string.format("q 0.1 G 0.1 w -0.5 0 m 0.5 0 l -0.5 %g m 0.5 %g l s [0.2] 0 d 0.5 w 0.25 0 m 0.25 %g l s Q",-wd / factor,-wd / factor,-wd / factor)
end
wbox.mode = 0
node.insert_before(parent.list,head,wbox)
elseif head.id == 11 then -- kern
local wbox = node.new("whatsit","pdf_literal")
local color = "1 1 0 rg"
if head.kern < 0 then color = "1 0 0 rg" end
if parent.id == 0 then --hlist
wbox.data = string.format("q %s 0 w 0 0 %g 1 re B Q",color, head.kern / factor )
else
wbox.data = string.format("q %s 0 w 0 0 1 %g re B Q",color, -head.kern / factor )
end
node.insert_before(parent.list,head,wbox)
elseif head.id == 12 then -- penalty
local color = "1 g"
local wbox = node.new("whatsit","pdf_literal")
if head.penalty < 10000 then
color = string.format("%d g", 1 - head.penalty / 10000)
end
wbox.data = string.format("q %s 0 w 0 0 1 1 re B Q",color)
node.insert_before(parent.list,head,wbox)
else
-- ignore
end
head = head.next
end
end
local function draw()
draw_pagebox(tex.box["AtBeginShipoutBox"].list,tex.box["AtBeginShipoutBox"])
end
return { draw = draw }
-- Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the
-- "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge,
-- publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do
-- so, subject to the following conditions:
--
-- The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
--
-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
-- FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-- WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|