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annotate rlgterm.js @ 163:0f6da35b27a0

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RLGWebD: overhaul the list of current games. The /status WebSocket now only sends a complete list when opened. At 40-second intervals, it sends a list of games that have been updated in the last minute. The client now uses this to keep its own list.
author John "Elwin" Edwards
date Sun, 04 Jan 2015 16:55:57 -0500
parents a2a25b7631f1
children bf518a00190b
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1 /* rlgterm.js: Roguelike Gallery's driver for termemu.js */
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3 /* Data on the available games. */
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4 var games = {
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5 "rogue3": {
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6 "name": "Rogue V3",
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7 "uname": "rogue3"
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8 },
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9 "rogue4": {
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10 "name": "Rogue V4",
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11 "uname": "rogue4"
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12 },
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13 "rogue5": {
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14 "name": "Rogue V5",
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15 "uname": "rogue5"
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16 },
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17 "srogue": {
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18 "name": "Super-Rogue",
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19 "uname": "srogue"
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20 },
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21 "arogue5": {
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22 "name": "Advanced Rogue 5",
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23 "uname": "arogue5"
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24 }
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25 };
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26
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27 var session = {
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28 /* The session id assigned by the server. */
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29 connect: false,
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30 /* Login name and key are now in sessionStorage. */
59
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31 /* Whether the game is being played or just watched. */
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32 playing: false,
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33 /* WebSocket for communication */
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34 sock: null
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35 };
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36
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37 /* The interval ID for checking the status of current games. */
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38 var statInterval = null;
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39 /* How frequently to check. */
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40 var statDelta = 8000;
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41 /* A WebSocket to listen for status events. */
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42 var statsock = null;
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43 /* List of currently active games. */
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44 var currentList = [];
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45 /* Last time the list was updated. */
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46 var currentTS = null;
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47
0
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48 function writeData(hexstr) {
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49 var codenum;
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50 var codes = [];
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51 var nc;
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52 var u8wait = 0; /* Stores bits from previous bytes of multibyte sequences. */
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53 var expect = 0; /* The number of 10------ bytes expected. */
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54 /* UTF-8 translation. */
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55 for (var i = 0; i < hexstr.length; i += 2) {
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56 nc = Number("0x" + hexstr.substr(i, 2));
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57 if (nc < 0x7F) {
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58 /* 0------- */
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59 codes.push(nc);
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60 /* Any incomplete sequence will be discarded. */
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61 u8wait = 0;
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62 expect = 0;
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63 }
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64 else if (nc < 0xC0) {
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65 /* 10------ : part of a multibyte sequence */
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66 if (expect > 0) {
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67 u8wait <<= 6;
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68 u8wait += (nc & 0x3F);
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69 expect--;
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70 if (expect == 0) {
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71 codes.push(u8wait);
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72 u8wait = 0;
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73 }
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74 }
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75 else {
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76 /* Assume an initial byte was missed. */
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77 u8wait = 0;
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78 }
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79 }
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80 /* These will all discard any incomplete sequence. */
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81 else if (nc < 0xE0) {
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82 /* 110----- : introduces 2-byte sequence */
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83 u8wait = (nc & 0x1F);
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