Mercurial > hg > rlgwebd
annotate shterm.js @ 55:96815eae4ebe
RLG-Web: make multiple watchers possible.
Split the TermSession class into the new TermSession, which handles the
PTY, and client classes, which handle HTTP sessions. These are Player
and Watcher. This allows multiple watchers per game, and other
improvements.
author | John "Elwin" Edwards <elwin@sdf.org> |
---|---|
date | Mon, 18 Jun 2012 13:43:51 -0700 |
parents | 155f3c104759 |
children | 7a50b4412fea |
rev | line source |
---|---|
1 | 1 /* shterm.js: browser-side JavaScript to handle I/O for termemu.js when it |
2 * is running a shell via the webtty.js server. | |
3 */ | |
4 | |
14
155f3c104759
shterm.js: Client-side message ordering
John "Elwin" Edwards <elwin@sdf.org>
parents:
13
diff
changeset
|
5 var nsend = 0; // The number of the next packet to send. |
155f3c104759
shterm.js: Client-side message ordering
John "Elwin" Edwards <elwin@sdf.org>
parents:
13
diff
changeset
|
6 var nrecv = 0; // The next packet expected. |
155f3c104759
shterm.js: Client-side message ordering
John "Elwin" Edwards <elwin@sdf.org>
parents:
13
diff
changeset
|
7 var msgQ = []; // Queue for out-of-order messages. |
13
bf7c26d0b66d
webtty: switch upward protocol to JSON
John "Elwin" Edwards <elwin@sdf.org>
parents:
12
diff
changeset
|
8 |
0
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
9 // A state machine that keeps track of polling the server. |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
10 var ajaxstate = { |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
11 state: 0, |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
12 timerID: null, |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
13 clear: function () { |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
14 if (this.timerID != null) { |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
15 window.clearTimeout(this.timerID); |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
16 this.timerID = null; |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
17 } |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
18 }, |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
19 set: function (ms) { |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
20 this.clear(); |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
21 this.timerID = window.setTimeout(getData, ms); |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
22 }, |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
23 gotdata: function () { |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
24 this.set(100); |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
25 this.state = 0; |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
26 }, |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
27 gotnothing: function () { |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
28 if (this.state == 0) { |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
29 this.set(100); |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
30 this.state = 1; |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
31 } |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
32 else if (this.state == 1) { |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
33 this.set(300); |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
34 this.state = 2; |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
35 } |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
36 else if (this.state == 2) { |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
37 this.set(1000); |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
38 this.state = 3; |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
39 } |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
40 else { |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
41 this.set(5000); |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
42 this.state = 3; |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
43 } |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
44 }, |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
45 posted: function () { |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
46 this.set(100); |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
47 this.state = 0; |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
48 } |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
49 }; |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
50 |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
51 function writeData(hexstr) { |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
52 var codenum; |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
53 var codes = []; |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
54 var nc; |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
55 var u8wait = 0; /* Stores bits from previous bytes of multibyte sequences. */ |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
56 var expect = 0; /* The number of 10------ bytes expected. */ |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
57 /* UTF-8 translation. */ |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
58 for (var i = 0; i < hexstr.length; i += 2) { |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
59 nc = Number("0x" + hexstr.substr(i, 2)); |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
60 if (nc < 0x7F) { |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
61 /* 0------- */ |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
62 codes.push(nc); |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
63 /* Any incomplete sequence will be discarded. */ |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
64 u8wait = 0; |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
65 expect = 0; |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
66 } |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
67 else if (nc < 0xC0) { |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
68 /* 10------ : part of a multibyte sequence */ |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
69 if (expect > 0) { |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
70 u8wait <<= 6; |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
71 u8wait += (nc & 0x3F); |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
72 expect--; |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
73 if (expect == 0) { |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
74 codes.push(u8wait); |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
75 u8wait = 0; |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
76 } |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
77 } |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
78 else { |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
79 /* Assume an initial byte was missed. */ |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
80 u8wait = 0; |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
81 } |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
82 } |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
83 /* These will all discard any incomplete sequence. */ |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
84 else if (nc < 0xE0) { |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
85 /* 110----- : introduces 2-byte sequence */ |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
86 u8wait = (nc & 0x1F); |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|
87 expect = 1; |
bd412f63ce0d
Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff
changeset
|