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annotate termemu.js @ 49:423ef87ddc9b

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RLG-Web: delay removing TermSessions until the client is informed. Add a TermSession.sendq flag that indicates whether a type q message has been sent to the client. Don't immediately destroy the TermSession on child exit if the message hasn't been sent. This is an ugly hack until the TermSession class is separated into an EventEmitter to handle the PTY and a listening object that handles communication with the client. That will also allow other clients to watch the game.
author John "Elwin" Edwards <elwin@sdf.org>
date Mon, 11 Jun 2012 09:15:33 -0700
parents 826a7ced69f8
children de01aafd4dd6
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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 }
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41 else {
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42 this.x = 0;
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43 this.y = 0;
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44 this.bold = false;
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45 this.inverse = false;
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46 this.uline = false;
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47 this.fg = null;
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48 this.bg = null;
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49 this.cset = "B";
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50 }
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51 return;
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52 }
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53
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54 // An object representing the terminal emulator.
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55 var termemu = {
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56 sessid: null, // Session key assigned by the server
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57 alive: false,
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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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