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annotate termemu.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 1d3cfe10974a
children d60063a674e1
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1 /* termemu.js: a mostly xterm-compatible terminal emulator for a webpage */
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2 /* SELF-HOSTING 2011-09-23 */
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3
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4 // How detailed the debugging should be.
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5 var debugSuppress = 1;
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6 // Some char values.
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7 var csiPre = [63, 62, 33];
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8 var csiPost = [36, 34, 39, 32];
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9 function csiFinal(code) {
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10 /* @A-Z */
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11 if (code >= 64 && code <= 90)
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12 return true;
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13 /* `a-z{| */
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14 if (code >= 96 && code <= 124)
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15 return true;
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16 return false;
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17 }
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18 var esc7ctl = [68, 69, 72, 77, 78, 79, 80, 86, 87, 88, 90, 91, 92, 93, 94, 95];
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19 var escSingle = [55, 56, 61, 62, 70, 99, 108, 109, 110, 111, 124, 125, 126];
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20 var escDouble = [32, 35, 37, 40, 41, 42, 43, 45, 46, 47];
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21
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22 var decChars = {96: 0x2666, 97: 0x2592, 102: 0xB0, 103: 0xB1,
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23 106: 0x2518, 107: 0x2510, 108: 0x250C, 109: 0x2514,
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24 110: 0x253C, 111: 0x23BA, 112: 0x23BB, 113: 0x2500,
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25 114: 0x23BC, 115: 0x23BD, 116: 0x251C, 117: 0x2524,
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26 118: 0x2534, 119: 0x252C, 120: 0x2502, 121: 0x2264,
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27 122: 0x2265, 123: 0x03C0, 124: 0x2260, 125: 0xA3, 126: 0xB7};
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28
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29 /* Not everything that should be saved by DECSC has been implemented yet. */
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30 function Cursor(src) {
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31 if (src) {
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32 this.x = src.x;
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33 this.y = src.y;
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34 this.bold = src.bold;
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35 this.inverse = src.inverse;
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36 this.uline = src.uline;
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37 this.fg = src.fg;
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38 this.bg = src.bg;
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39 this.cset = src.cset;
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40 this.visible = src.visible;
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41 }
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42 else {
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43 this.x = 0;
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44 this.y = 0;
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45 this.bold = false;
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46 this.inverse = false;
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47 this.uline = false;
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48 this.fg = null;
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49 this.bg = null;
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50 this.cset = "B";
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51 this.visible = true;
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52 }
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53 return;
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54 }
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55
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56 // An object representing the terminal emulator.
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57 var termemu = {
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58 /* Some elements of the page. */
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59 inwrap: null, // A non-table div wrapping the screen
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60 view: null, // The div holding the terminal screen
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61 screen: null, // The div representing the active screen area
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62 normbuf: null, // The normal screen buffer
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63 altbuf: null, // The alternate screen buffer
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64 histbuf: null, // The screen history buffer
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65 /* Attributes */
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66 w: 0, // Screen width
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67 h: 0, // Screen height
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68 fgColor: "#b2b2b2", // Default color for text
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69 bgColor: "black", // Default background color
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70 scrT: 0, // top and bottom of scrolling region
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71 scrB: 0, // init() will set this properly
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72 c: null, // Contains cursor position and text attributes
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73 offedge: false, // Going off the edge doesn't mean adding a new line
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74 clearAttrs: function () {
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75 /* Make sure to reset ALL attribute properties and NOTHING else. */
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76 this.c.bold = false;
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77 this.c.inverse = false;
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78 this.c.uline = false;
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79 this.c.fg = null;
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80 this.c.bg = null;
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81 },
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82 saved: null, // saved cursor
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83 normc: null, // Stores the normal screen buffer cursor when using altbuf
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84 ansicolors: ["#000000", "#b21818", "#18b218", "#b26818", "#1818b2",
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85 "#b218b2", "#18b2b2", "#b2b2b2"],
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