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s-present-stepwise.mkiv /size: 5112 b last modification: 2020-07-01 14:35
1%D \module
2%D   [      file=s-present-stepwise, % was s-pre-60
3%D        version=2004.03.15,
4%D          title=\CONTEXT\ Style File,
5%D       subtitle=Presentation Environment Stepwise,
6%D         author=Hans Hagen,
7%D           date=\currentdate,
8%D      copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
9%C
10%C This module is part of the \CONTEXT\ macro||package and is
11%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
12%C details.
13
14% use lua instead of global mess
15
16\startmodule
[
present
-
stepwise
]
17
18\unprotect
19
20\startmode
[
paper
,
print
]
21    \let
\StartSteps
\relax
22    \let
\StopSteps
 \relax
23    \let
\FlushStep
 \relax
24    \let
\ResetStep
 \relax
25    \let
\StartBusy
 \relax
26    \let
\StopBusy
  \relax
27    \endinput
28\stopmode
29
30\newcount
\c_module_pre_steps_current
31\newcount
\c_module_pre_steps_maximum
32\newcount
\c_module_pre_steps_nesting_step
33\newcount
\c_module_pre_steps_nesting_steps
34\newcount
\c_module_pre_steps_nesting_busy
35
36\def
\StepCounter
   {
\the
\c_module_pre_steps_current
}
37\def
\StepMaximum
   {
\the
\c_module_pre_steps_maximum
}
38\def
\StepLayer
     {
step
:
\the
\c_module_pre_steps_current
}
39\def
\NextStepLayer
 {
step
:
\the
\numexpr
\c_module_pre_steps_current
+
\plusone
\relax
}
40\def
\FirstStepLayer
{
step
:
1
}
41
42\useJSscripts
[
stp
]
43
44\startsetups
[
set
-
stepper
]
45
46    \ifnum
\getvariable
{
stepper
}
{
nofsteps
}
>
\c_module_pre_steps_maximum
47
48        \dostepwiserecurse
 {
\numexpr
\c_module_pre_steps_maximum
+
\plusone
\relax
}
 {
\getvariable
{
stepper
}
{
nofsteps
}
}
 {
1
}
 {
49            \doifnotmode
{
nosteps
,
nostep
}
 {
50                \expanded
{
\defineviewerlayer
[
step
:
\recurselevel
]
[
state
=
stop
,
scope
=
global
]
}
51            }
52        }
53
54        \global
\c_module_pre_steps_maximum
\getvariable
{
stepper
}
{
nofsteps
}
\relax
55
56    \fi
57
58\stopsetups
59
60\setvariables
61  [
stepper
]
62  [
set
=
\setups
{
set
-
stepper
}
,
63   nofsteps
=
5
0
]
64
65\defineviewerlayer
[
step
:
busy
]
[
state
=
start
]
66
67\definereference
 [
SetupStepper
]
  [
JS
(
SetupStepper
{
step
,
\StepMaximum
}
)
]
68\definereference
 [
ResetStepper
]
  [
JS
(
ResetStepper
)
]
69\definereference
 [
CheckStepper
]
  [
JS
(
CheckStepper
{
\StepCounter
}
)
]
70\definereference
 [
InvokeStepper
]
 [
JS
(
InvokeStepper
)
]
71
72% todo: roll back blank
73
74\unexpanded
\def
\ResetStep
75  {
\iftrialtypesetting
\else
76     \global
\c_module_pre_steps_current
\zerocount
77   \fi
}
78
79\unexpanded
\def
\NextStep
80  {
\iftrialtypesetting
\else
81     \global
\advance
\c_module_pre_steps_current
\plusone
82   \fi
}
83
84\unexpanded
\def
\PrevStep
85  {
\iftrialtypesetting
\else
86     \global
\advance
\c_module_pre_steps_current
\minusone
87   \fi
}
88
89\unexpanded
\def
\FlushStep
90  {
\iftrialtypesetting
\else
91     \StopStep
92     \NextStep
93     \StartStep
94   \fi
}
95
96\unexpanded
\def
\StartStep
97  {
\iftrialtypesetting
\else
98     \global
\advance
\c_module_pre_steps_nesting_step
\plusone
99     \ifcase
\c_module_pre_steps_nesting_step
\or
100       \startviewerlayer
[
\StepLayer
]
%
101     \fi
102   \fi
103   \ignorespaces
}
104
105\unexpanded
\def
\StopStep
106  {
\removeunwantedspaces
107   \iftrialtypesetting
\else
108     \ifcase
\c_module_pre_steps_nesting_step
\or
109       \stopviewerlayer
110     \fi
111     \global
\advance
\c_module_pre_steps_nesting_step
\minusone
112   \fi
}
113
114\unexpanded
\def
\StartSteps
115  {
\iftrialtypesetting
\else
116     \global
\advance
\c_module_pre_steps_nesting_steps
\plusone
117     \ifcase
\c_module_pre_steps_nesting_steps
\or
118       \ResetStep
119       \NextStep
120       \StartStep
121     \fi
122   \fi
}
123
124\unexpanded
\def
\StopSteps
125  {
\iftrialtypesetting
\else
126     \ifcase
\c_module_pre_steps_nesting_steps
\or
127       \StopStep
128       \PrevStep
129     \fi
130     \global
\advance
\c_module_pre_steps_nesting_steps
\minusone
131   \fi
}
132
133\unexpanded
\def
\StartBusy
134  {
\iftrialtypesetting
\else
135     \global
\advance
\c_module_pre_steps_nesting_busy
\plusone
136     \ifcase
\c_module_pre_steps_nesting_busy
\or
137       \startviewerlayer
[
step
:
busy
]
138     \fi
139   \fi
140   \ignorespaces
}
141
142\unexpanded
\def
\StopBusy
143  {
\removeunwantedspaces
144   \iftrialtypesetting
\else
145     \ifcase
\c_module_pre_steps_nesting_busy
\or
146       \stopviewerlayer
147     \fi
148     \global
\advance
\c_module_pre_steps_nesting_busy
\minusone
149   \fi
}
150
151%D Handy:
152
153\unexpanded
\def
\StartLocalSteps
154  {
\ResetStep
}
155
156\unexpanded
\def
\StopLocalSteps
157  {
}
158
159\unexpanded
\def
\StartLocalStep
160  {
\NextStep
161   \StartStep
}
162
163\unexpanded
\def
\StopLocalStep
164  {
\StopStep
}
165
166\appendtoks
167    \ResetStep
168\to
 \everyaftershipout
169
170\setupinteraction
171  [
%openaction=SetupStepper,
172   closeaction
=
ResetStepper
,
173   openpageaction
=
CheckStepper
,
174   closepageaction
=
ResetStepper
]
175
176\defineoverlay
[
invoke
]
[
\overlaybutton
{
InvokeStepper
}
]
177
178\setupbackgrounds
179  [
text
]
180  [
background
=
invoke
]
181
182% bonus
183
184\useMPlibrary
[
nav
]
185
186\definepalet
187  [
navplus
]
188  [
attach
=
interactioncolor
,
189   comment
=
interactioncolor
]
190
191\setupcomment
192  [
symbol
=
{
comment
-
normal
,
comment
-
down
}
,
193   textlayer
=
\StepLayer
,
194   option
=
buffer
,
195   height
=
\textheight
,
196   width
=
\textwidth
,
197   margin
=
0
pt
]
198
199\setupattachments
200  [
symbol
=
{
attach
-
normal
,
attach
-
down
}
,
201   textlayer
=
\StepLayer
]
202
203%D used as (given some definitions):
204%D
205%D \starttyping
206%D \StartLocalSteps
207%D     \startcombination[both]
208%D         {\StartLocalStep\placestreamlayer[left]\StopLocalStep}  {}
209%D         {\StartLocalStep\placestreamlayer[right]\StopLocalStep} {}
210%D     \stopcombination
211%D \StopLocalSteps
212%D \stoptyping
213
214\protect
215
216\stopmodule
217
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