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scrn-wid.lua /size: 10 Kb last modification: 2020-07-01 14:35
1if
 not
 modules
 then
 modules
 =
 {
 }
 end
 modules
 [
'
scrn-wid
'
]
 =
 {
2    version
   =
 1
.
001
,
3    comment
   =
 "
companion to scrn-wid.mkiv
"
,
4    author
    =
 "
Hans Hagen, PRAGMA-ADE, Hasselt NL
"
,
5    copyright
 =
 "
PRAGMA ADE / ConTeXt Development Team
"
,
6    license
   =
 "
see context related readme files
"
7}
8
9-- Support for interactive features is handled elsewhere. Now that is some mess! In
10-- the early days one had media features like sound and movies that were easy to set
11-- up. Then at some point renditions came around which were more work and somewhat
12-- unreliable. Now, both mechanism are obsolete and replaced by rich media which is
13-- a huge mess and has no real concept of what media are supported. There's flash
14-- cq. shockwave (basically obsolete too), and for instance mp4 needs to be handled
15-- by a swf player, and there's u3d which somehow has its own specification. One
16-- would expect native support for video and audio to be en-par with browsers but
17-- alas ... pdf has lost the battle with html here due to a few decades of
18-- unstability and changing support. So far we could catch on and even were ahead
19-- but I wonder if we should keep doing that. As we can't trust support for media we
20-- can better not embed anything and just use a hyperlink to an external resource. No
21-- sane person will create media rich pdf's as long as it's that unpredictable. Just
22-- look at the specification and viewer preferences and decide.
23
24local
 next
 =
 next
25
26interactions
             =
 interactions
 or
 {
 }
27local
 interactions
       =
 interactions
28
29local
 context
            =
 context
30local
 implement
          =
 interfaces
.
implement
31
32local
 allocate
           =
 utilities
.
storage
.
allocate
33
34local
 attachments
        =
 allocate
(
)
35local
 comments
           =
 allocate
(
)
36local
 soundclips
         =
 allocate
(
)
37local
 renderings
         =
 allocate
(
)
38local
 linkedlists
        =
 allocate
(
)
39
40interactions
.
attachments
 =
 attachments
41interactions
.
soundclips
  =
 soundclips
42interactions
.
renderings
  =
 renderings
43interactions
.
linkedlists
 =
 linkedlists
44
45local
 texsetbox
          =
 tex
.
setbox
46
47local
 jobpasses
          =
 job
.
passes
48
49local
 texgetcount
        =
 tex
.
getcount
50
51local
 codeinjections
     =
 backends
.
codeinjections
52local
 nodeinjections
     =
 backends
.
nodeinjections
53
54local
 variables
          =
 interfaces
.
variables
55local
 v_auto
             =
 variables
.
auto
56
57local
 trace_attachments
 =
 false
  trackers
.
register
(
"
widgets.attachments
"
,
 function
(
v
)
 trace_attachments
 =
 v
 end
)
58
59local
 report_attachments
 =
 logs
.
reporter
(
"
widgets
"
,
"
attachments
"
)
60
61-- Symbols
62
63implement
 {
64    name
      =
 "
presetsymbollist
"
,
65    arguments
 =
 "
string
"
,
66    actions
   =
 function
(
list
)
67        codeinjections
.
presetsymbollist
(
list
)
68    end
69}
70
71-- Attachments
72--
73-- registered : unique id
74-- tag        : used at the tex end
75-- file       : name that the file has on the filesystem
76-- name       : name that the file will get in the output
77-- title      : up to the backend
78-- subtitle   : up to the backend
79-- author     : up to the backend
80-- method     : up to the backend (hidden == no rendering)
81
82local
 nofautoattachments
,
 lastregistered
 =
 0
,
 nil
83
84local
 function
 checkregistered
(
specification
)
85    local
 registered
 =
 specification
.
registered
86    if
 not
 registered
 or
 registered
 =
=
 "
"
 or
 registered
 =
=
 v_auto
 then
87        nofautoattachments
 =
 nofautoattachments
 +
 1
88        lastregistered
 =
 "
attachment-
"
 .
.
 nofautoattachments
89        specification
.
registered
 =
 lastregistered
90        return
 lastregistered
91    else
92        return
 registered
93    end
94end
95
96local
 function
 checkbuffer
(
specification
)
97    local
 buffer
 =
 specification
.
buffer
98    if
 buffer
 ~
=
 "
"
 then
99        specification
.
data
 =
 buffers
.
getcontent
(
buffer
)
 or
 "
<no data>
"
100    end
101end
102
103function
 attachments
.
register
(
specification
)
 -- beware of tag/registered mixup(tag is namespace)
104    local
 registered
 =
 checkregistered
(
specification
)
105    checkbuffer
(
specification
)
106    attachments
[
registered
]
 =
 specification
107    if
 trace_attachments
 then
108        report_attachments
(
"
registering %a
"
,
registered
)
109    end
110    return
 specification
111end
112
113function
 attachments
.
insert
(
specification
)
114    local
 registered
 =
 checkregistered
(
specification
)
115    local
 r
 =
 attachments
[
registered
]
116    if
 r
 then
117        if
 trace_attachments
 then
118            report_attachments
(
"
including registered %a
"
,
registered
)
119        end
120        for
 k
,
 v
 in
 next
,
 r
 do
121            local
 s
 =
 specification
[
k
]
122            if
 s
 =
=
 "
"
 then
123                specification
[
k
]
 =
 v
124            end
125        end
126    elseif
 trace_attachments
 then
127        report_attachments
(
"
including unregistered %a
"
,
registered
)
128    end
129    checkbuffer
(
specification
)
130    return
 nodeinjections
.
attachfile
(
specification
)
131end
132
133implement
 {
134    name
      =
 "
registerattachment
"
,
135    actions
   =
 attachments
.
register
,
136    arguments
 =
 {
137        {
138            {
 "
tag
"
 }
,
139            {
 "
registered
"
 }
,
140            {
 "
title
"
 }
,
141            {
 "
subtitle
"
 }
,
142            {
 "
author
"
 }
,
143            {
 "
file
"
 }
,
144            {
 "
name
"
 }
,
145            {
 "
buffer
"
 }
,
146            {
 "
mimetype
"
 }
,
147        }
148    }
149}
150
151implement
 {
152    name
      =
 "
insertattachment
"
,
153    actions
   =
 function
(
specification
)
154                    texsetbox
(
"
b_scrn_attachment_link
"
,
(
attachments
.
insert
(
specification
)
)
)
155                end
,
156    arguments
 =
 {
157        {
158            {
 "
tag
"
 }
,
159            {
 "
registered
"
 }
,
160            {
 "
method
"
 }
,
161            {
 "
width
"
,
 "
dimen
"
 }
,
162            {
 "
height
"
,
 "
dimen
"
 }
,
163            {
 "
depth
"
,
 "
dimen
"
 }
,
164            {
 "
colormodel
"
,
 "
integer
"
 }
,
165            {
 "
colorvalue
"
,
 "
integer
"
 }
,
166            {
 "
color
"
 }
,
167            {
 "
transparencyvalue
"
,
 "
integer
"
 }
,
168            {
 "
symbol
"
 }
,
169            {
 "
layer
"
 }
,
170            {
 "
title
"
 }
,
171            {
 "
subtitle
"
 }
,
172            {
 "
author
"
 }
,
173            {
 "
file
"
 }
,
174            {
 "
name
"
 }
,
175            {
 "
buffer
"
 }
,
176            {
 "
mimetype
"
 }
,
177        }
178    }
179}
180
181-- Comment
182
183function
 comments
.
insert
(
specification
)
184    local
 buffer
 =
 specification
.
buffer
185    if
 buffer
 ~
=
 "
"
 then
186        specification
.
data
 =
 buffers
.
getcontent
(
buffer
)
 or
 "
"
187    end
188    return
 nodeinjections
.
comment
(
specification
)
189end
190
191implement
 {
192    name
      =
 "
insertcomment
"
,
193    actions
   =
 function
(
specification
)
194                    texsetbox
(
"
b_scrn_comment_link
"
,
(
comments
.
insert
(
specification
)
)
)
195                end
,
196    arguments
 =
 {
197        {
198            {
 "
tag
"
 }
,
199            {
 "
title
"
 }
,
200            {
 "
subtitle
"
 }
,
201            {
 "
author
"
 }
,
202            {
 "
width
"
,
 "
dimen
"
 }
,
203            {
 "
height
"
,
 "
dimen
"
 }
,
204            {
 "
depth
"
,
 "
dimen
"
 }
,
205            {
 "
nx
"
 }
,
206            {
 "
ny
"
 }
,
207            {
 "
colormodel
"
,
 "
integer
"
 }
,
208            {
 "
colorvalue
"
,
 "
integer
"
 }
,
209            {
 "
transparencyvalue
"
,
 "
integer
"
 }
,
210            {
 "
option
"
 }
,
211            {
 "
symbol
"
 }
,
212            {
 "
buffer
"
 }
,
213            {
 "
layer
"
 }
,
214            {
 "
space
"
 }
,
215        }
216    }
217}
218
219-- Soundclips
220
221function
 soundclips
.
register
(
specification
)
222    local
 tag
 =
 specification
.
tag
223    if
 tag
 and
 tag
 ~
=
 "
"
 then
224        local
 filename
 =
 specification
.
file
225        if
 not
 filename
 or
 filename
 =
=
 "
"
 then
226            filename
 =
 tag
227            specification
.
file
 =
 filename
228        end
229        soundclips
[
tag
]
 =
 specification
230        return
 specification
231    end
232end
233
234function
 soundclips
.
insert
(
tag
)
235    local
 sc
 =
 soundclips
[
tag
]
236    if
 not
 sc
 then
237        -- todo: message
238        return
 soundclips
.
register
 {
 tag
 =
 tag
 }
239    else
240        return
 sc
241    end
242end
243
244implement
 {
245    name
      =
 "
registersoundclip
"
,
246    actions
   =
 soundclips
.
register
,
247    arguments
 =
 {
248        {
249            {
 "
tag
"
 }
,
250            {
 "
file
"
 }
251        }
252    }
253}
254
255implement
 {
256    name
      =
 "
insertsoundclip
"
,
257    actions
   =
 soundclips
.
insert
,
258    arguments
 =
 {
259        {
260            {
 "
tag
"
 }
,
261            {
 "
repeat
"
 }
262        }
263    }
264}
265
266-- Renderings
267
268function
 renderings
.
register
(
specification
)
269    if
 specification
.
label
 then
270        renderings
[
specification
.
label
]
 =
 specification
271        return
 specification
272    end
273end
274
275function
 renderings
.
rendering
(
label
)
276    local
 rn
 =
 renderings
[
label
]
277    if
 not
 rn
 then
278        -- todo: message
279        return
 renderings
.
register
 {
 label
 =
 label
 }
280    else
281        return
 rn
282    end
283end
284
285function
 renderings
.
var
(
label
,
key
)
286    local
 rn
 =
 renderings
[
label
]
287    return
 rn
 and
 rn
[
key
]
 or
 "
"
288end
289
290implement
 {
291    name
      =
 "
renderingvar
"
,
292    actions
   =
 {
 renderings
.
var
,
 context
 }
,
293    arguments
 =
 "
2 strings
"
,
294}
295
296implement
 {
297    name
      =
 "
registerrendering
"
,
298    actions
   =
 renderings
.
register
,
299    arguments
 =
 {
300        {
301            {
 "
type
"
 }
,
302            {
 "
label
"
 }
,
303            {
 "
mime
"
 }
,
304            {
 "
filename
"
 }
,
305            {
 "
option
"
 }
,
306        }
307    }
308}
309
310-- Rendering:
311
312implement
 {
313    name
      =
 "
insertrenderingwindow
"
,
314    actions
   =
 function
(
specification
)
315                    codeinjections
.
insertrenderingwindow
(
specification
)
316                end
,
317    arguments
 =
 {
318        {
319            {
 "
label
"
 }
,
320            {
 "
width
"
,
 "
dimen
"
 }
,
321            {
 "
height
"
,
 "
dimen
"
  }
,
322            {
 "
option
"
 }
,
323            {
 "
page
"
,
 "
integer
"
 }
,
324        }
325    }
326}
327
328-- Linkedlists (only a context interface)
329
330implement
 {
331    name
      =
 "
definelinkedlist
"
,
332    arguments
 =
 "
string
"
,
333    actions
   =
 function
(
tag
)
334                    -- no need
335                end
336}
337
338implement
 {
339    name
      =
 "
enhancelinkedlist
"
,
340    arguments
 =
 {
 "
string
"
,
 "
integer
"
 }
,
341    actions
   =
 function
(
tag
,
n
)
342                    local
 ll
 =
 jobpasses
.
gettobesaved
(
tag
)
343                    if
 ll
 then
344                        ll
[
n
]
 =
 texgetcount
(
"
realpageno
"
)
345                    end
346                end
347}
348
349implement
 {
350    name
      =
 "
addlinklistelement
"
,
351    arguments
 =
 "
string
"
,
352    actions
   =
 function
(
tag
)
353                    local
 tobesaved
   =
 jobpasses
.
gettobesaved
(
tag
)
354                    local
 collected
   =
 jobpasses
.
getcollected
(
tag
)
 or
 {
 }
355                    local
 currentlink
 =
 #
tobesaved
 +
 1
356                    local
 noflinks
    =
 #
collected
357                    tobesaved
[
currentlink
]
 =
 0
358                    local
 f
 =
 collected
[
1
]
 or
 0
359                    local
 l
 =
 collected
[
noflinks
]
 or
 0
360                    local
 p
 =
 collected
[
currentlink
-1
]
 or
 f
361                    local
 n
 =
 collected
[
currentlink
+
1
]
 or
 l
362                    context
.
setlinkedlistproperties
(
currentlink
,
noflinks
,
f
,
p
,
n
,
l
)
363                 -- context.ctxlatelua(function() commands.enhancelinkedlist(tag,currentlink) end)
364                end
365}
366
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