Mercurial > hg > rlgwebd

annotate rlgterm.js @ 38:b06a14876645

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
RLG-Web: reduce polling further. The ajaxstate object now reduces polling to 15-second intervals and stops entirely after one minute.
author John "Elwin" Edwards <elwin@sdf.org>
date Wed, 06 Jun 2012 10:53:29 -0700
parents f15efa4818b4
children e8ac0e3d2614
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
1 /* rlgterm.js: Roguelike Gallery's driver for termemu.js */
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
2
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
3 // 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
4 var ajaxstate = {
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
5 state: 0,
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
6 timerID: null,
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
7 clear: function () {
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
8 if (this.timerID != null) {
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
9 window.clearTimeout(this.timerID);
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
10 this.timerID = null;
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
11 }
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
12 },
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
13 set: function (ms) {
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
14 this.clear();
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
15 this.timerID = window.setTimeout(getData, ms);
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
16 },
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
17 gotdata: function () {
35
f15efa4818b4 rglterm.js: reduce the server polling.
John "Elwin" Edwards <elwin@sdf.org>
parents: 27
diff changeset
18 this.set(1000);
f15efa4818b4 rglterm.js: reduce the server polling.
John "Elwin" Edwards <elwin@sdf.org>
parents: 27
diff changeset
19 this.state = 1;
0
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
20 },
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
21 gotnothing: function () {
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
22 if (this.state == 0) {
35
f15efa4818b4 rglterm.js: reduce the server polling.
John "Elwin" Edwards <elwin@sdf.org>
parents: 27
diff changeset
23 this.set(1000);
0
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
24 this.state = 1;
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
25 }
38
b06a14876645 RLG-Web: reduce polling further.
John "Elwin" Edwards <elwin@sdf.org>
parents: 35
diff changeset
26 else if (this.state < 4) {
35
f15efa4818b4 rglterm.js: reduce the server polling.
John "Elwin" Edwards <elwin@sdf.org>
parents: 27
diff changeset
27 this.set(4000);
38
b06a14876645 RLG-Web: reduce polling further.
John "Elwin" Edwards <elwin@sdf.org>
parents: 35
diff changeset
28 this.state++;
b06a14876645 RLG-Web: reduce polling further.
John "Elwin" Edwards <elwin@sdf.org>
parents: 35
diff changeset
29 }
b06a14876645 RLG-Web: reduce polling further.
John "Elwin" Edwards <elwin@sdf.org>
parents: 35
diff changeset
30 else if (this.state < 8) {
b06a14876645 RLG-Web: reduce polling further.
John "Elwin" Edwards <elwin@sdf.org>
parents: 35
diff changeset
31 this.set(15000);
b06a14876645 RLG-Web: reduce polling further.
John "Elwin" Edwards <elwin@sdf.org>
parents: 35
diff changeset
32 this.state++;
b06a14876645 RLG-Web: reduce polling further.
John "Elwin" Edwards <elwin@sdf.org>
parents: 35
diff changeset
33 }
b06a14876645 RLG-Web: reduce polling further.
John "Elwin" Edwards <elwin@sdf.org>
parents: 35
diff changeset
34 else {
b06a14876645 RLG-Web: reduce polling further.
John "Elwin" Edwards <elwin@sdf.org>
parents: 35
diff changeset
35 /* It's been over a minute. Stop polling. */
b06a14876645 RLG-Web: reduce polling further.
John "Elwin" Edwards <elwin@sdf.org>
parents: 35
diff changeset
36 this.clear();
0
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
37 }
35
f15efa4818b4 rglterm.js: reduce the server polling.
John "Elwin" Edwards <elwin@sdf.org>
parents: 27
diff changeset
38 },
f15efa4818b4 rglterm.js: reduce the server polling.
John "Elwin" Edwards <elwin@sdf.org>
parents: 27
diff changeset
39 posted: function (wasdata) {
f15efa4818b4 rglterm.js: reduce the server polling.
John "Elwin" Edwards <elwin@sdf.org>
parents: 27
diff changeset
40 if (wasdata) {
0
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
41 this.set(1000);
35
f15efa4818b4 rglterm.js: reduce the server polling.
John "Elwin" Edwards <elwin@sdf.org>
parents: 27
diff changeset
42 this.state = 1;
0
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 else {
35
f15efa4818b4 rglterm.js: reduce the server polling.
John "Elwin" Edwards <elwin@sdf.org>
parents: 27
diff changeset
45 this.set(200);
f15efa4818b4 rglterm.js: reduce the server polling.
John "Elwin" Edwards <elwin@sdf.org>
parents: 27
diff changeset
46 this.state = 0;
0
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
47 }
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>