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annotate shterm.js @ 70:d7eb63cd7a16

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Try to get some compatibility for keys. I'd thought using the DOM_VK_ names was a good idea. Symbolic names ought to be more portable than opaque numeric constants. Foolish me, expecting things to be sane. Keys now work with FF15 and Chrome 17.
author John "Elwin" Edwards <elwin@sdf.org>
date Thu, 21 Jun 2012 09:43:52 -0700
parents 7a50b4412fea
children a497ecd116d9
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1
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1 /* shterm.js: browser-side JavaScript to handle I/O for termemu.js when it
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2 * is running a shell via the webtty.js server.
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3 */
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4
58
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5 var isalive = false; // Whether the session is currently active.
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6 var nsend = 0; // The number of the next packet to send.
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7 var nrecv = 0; // The next packet expected.
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8 var msgQ = []; // Queue for out-of-order messages.
13
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9
0
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10 // A state machine that keeps track of polling the server.
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11 var ajaxstate = {
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12 state: 0,
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13 timerID: null,
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14 clear: function () {
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15 if (this.timerID != null) {
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16 window.clearTimeout(this.timerID);
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17 this.timerID = null;
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18 }
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19 },
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20 set: function (ms) {
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21 this.clear();
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22 this.timerID = window.setTimeout(getData, ms);
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23 },
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24 gotdata: function () {
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25 this.set(100);
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26 this.state = 0;
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27 },
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28 gotnothing: function () {
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29 if (this.state == 0) {
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30 this.set(100);
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31 this.state = 1;
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32 }
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33 else if (this.state == 1) {
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34 this.set(300);
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35 this.state = 2;
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36 }
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37 else if (this.state == 2) {
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38 this.set(1000);
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39 this.state = 3;
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40 }
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41 else {
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42 this.set(5000);
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43 this.state = 3;
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44 }
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45 },
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46 posted: function () {
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47 this.set(100);
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48 this.state = 0;
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49 }
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50 };
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51
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52 function writeData(hexstr) {
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53 var codenum;
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54 var codes = [];
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55 var nc;
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56 var u8wait = 0; /* Stores bits from previous bytes of multibyte sequences. */
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57 var expect = 0; /* The number of 10------ bytes expected. */
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58 /* UTF-8 translation. */
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59 for (var i = 0; i < hexstr.length; i += 2) {
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60 nc = Number("0x" + hexstr.substr(i, 2));
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61 if (nc < 0x7F) {
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62 /* 0------- */
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63 codes.push(nc);
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64 /* Any incomplete sequence will be discarded. */
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65 u8wait = 0;
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66 expect = 0;
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67 }
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68 else if (nc < 0xC0) {
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69 /* 10------ : part of a multibyte sequence */
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70 if (expect > 0) {
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71 u8wait <<= 6;
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72 u8wait += (nc & 0x3F);
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73 expect--;
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74 if (expect == 0) {
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75 codes.push(u8wait);
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76 u8wait = 0;
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77 }
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78 }
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79 else {
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80 /* Assume an initial byte was missed. */
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81 u8wait = 0;
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82 }
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83 }
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84 /* These will all discard any incomplete sequence. */
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85 else if (nc < 0xE0) {
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86 /* 110----- : introduces 2-byte sequence */
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87 u8wait = (nc & 0x1F);
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88 expect = 1;
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89 }
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90 else if (nc < 0xF0) {
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91 /* 1110---- : introduces 3-byte sequence */
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92 u8wait = (nc & 0x0F);
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93 expect = 2;
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94 }
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95 else if (nc < 0xF8) {
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96 /* 11110--- : introduces 4-byte sequence */
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97 u8wait = (nc & 0x07);
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98 expect = 3;
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99 }
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100 else if (nc < 0xFC) {
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101 /* 111110-- : introduces 5-byte sequence */
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102 u8wait = (nc & 0x03);
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103 expect = 4;
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104 }
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105 else if (nc < 0xFE) {
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106 /* 1111110- : introduces 6-byte sequence */
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107 u8wait = (nc & 0x01);
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108 expect = 5;
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109 }
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110 else {
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111 /* 1111111- : should never appear */
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112 u8wait = 0;
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113 expect = 0;
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114 }
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115 /* Supporting all 31 bits is probably overkill... */
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116 }
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117 termemu.write(codes);
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118 return;
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119 }
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120
14
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121 function processMsg(response) {
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122 if (response.t != "d" || typeof(response.d) != "string")
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123 return;
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124 if (response.n === nrecv) {
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125 writeData(response.d);
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126 nrecv++;
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127 var next;
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128 /* msgQ must be shifted every time nrecv is incremented, but the process
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129 * stops whenever an empty space, corresponding to an unarrived message,
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130 * is encountered.
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131 */
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132 while ((next = msgQ.shift()) !== undefined) {
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133 writeData(next.d);
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134 nrecv++;
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135 }
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136 }
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137 else if (response.n > nrecv) {
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138 /* The current message comes after one still missing. Queue this one
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139 * for later use.
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140 */
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141 debug(1, "Got packet " + response.n + ", expected " + nrecv);
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142 msgQ[response.n - nrecv - 1] = response;
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143 }
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144 else {
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145 /* This message's number was encountered previously. */
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146 debug(1, "Discarding packet " + response.n + ", expected " + nrecv);
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147 }
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148 }
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149
0
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150 function getData() {
58
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151 if (!isalive)
0
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152 return;
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153 var datareq = new XMLHttpRequest();
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154 datareq.onreadystatechange = function () {
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155 if (datareq.readyState == 4 && datareq.status == 200) {
11
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156 var response = JSON.parse(this.responseText);
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157 if (!response.t)
0
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158 return;
11
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159 else if (response.t == "E") {
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160 if (response.c == 1) {
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161 isalive = false;
11
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162 debug(1, "Server error: " + response.s);
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163 }
0
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164 }
11
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165 else if (response.t == "n")
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166 ajaxstate.gotnothing();
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167 else if (response.t == "d") {
14
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168 processMsg(response);
0
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169 ajaxstate.gotdata();
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170 }
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171 return;
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172 }
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173 };
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174 datareq.open('GET', '/feed', true);
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175 datareq.send(null);
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176 return;
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177 }
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178
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179 function postResponseHandler() {
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180 if (this.readyState == 4 && this.status == 200) {
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181 var response = JSON.parse(this.responseText);
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182 if (!response.t || response.t == "n")
0
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183 return;
11
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184 else if (response.t == "E") {
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185 if (response.c == 1) {
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186 isalive = false;
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187 debug(1, "Server error: " + response.s);
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188 }
0
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189 return;
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190 }
11
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191 else if (response.t != "d")
0
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192 return;
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193 /* It is a data message */
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194 if (response.d) {
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195 processMsg(response);
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196 //debug(1, "Got packet " + response.n);
0
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197 }
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198 ajaxstate.posted();
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199 return;
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200 }
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201 }
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parents:
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202
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203 function sendback(str) {
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204 /* For responding to terminal queries. */
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205 var formdata = {"t": "d", "n": nsend++, "d": str};
0
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206 var datareq = new XMLHttpRequest();
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207 datareq.onreadystatechange = postResponseHandler;
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208 datareq.open('POST', '/feed', true);
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209 datareq.send(JSON.stringify(formdata));
0
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210 return;
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211 }
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John "Elwin" Edwards <elwin@sdf.org>
parents:
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212
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213 function sendkey(ev) {
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214 var keynum = ev.keyCode;
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215 var code;
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216 if (keynum >= 65 && keynum <= 90) {
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217 /* Letters. */
0
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218 if (ev.ctrlKey)
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219 keynum -= 64;
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John "Elwin" Edwards <elwin@sdf.org>
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220 else if (!ev.shiftKey)
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221 keynum += 32;
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222 code = keynum.toString(16);
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223 if (code.length < 2)
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224 code = "0" + code;
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225 }
70
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226 else if (keynum >= 48 && keynum <= 57) {
0
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227 /* The number row. */
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228 if (ev.shiftKey) {
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229 code = numShifts[keynum - 48].toString(16);
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230 }
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231 else {
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232 code = keynum.toString(16);
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233 }
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John "Elwin" Edwards <elwin@sdf.org>
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234 }
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John "Elwin" Edwards <elwin@sdf.org>
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diff changeset
235 else if (keynum in keyHexCodes) {
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diff changeset
236 if (ev.shiftKey)
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John "Elwin" Edwards <elwin@sdf.org>
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237 code = keyHexCodes[keynum][1];
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John "Elwin" Edwards <elwin@sdf.org>
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238 else
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239 code = keyHexCodes[keynum][0];
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240 }
70
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diff changeset
241 else if (keynum >= 16 && keynum <= 20) {
0
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242 return;
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243 }
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John "Elwin" Edwards <elwin@sdf.org>
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244 else {
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John "Elwin" Edwards <elwin@sdf.org>
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245 debug(1, "Ignoring keycode " + keynum);
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John "Elwin" Edwards <elwin@sdf.org>
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246 return;
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247 }
58
7a50b4412fea Move credentials into the drivers.
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248 if (isalive)
0
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249 ev.preventDefault();
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250 var formdata = {"t": "d", "n": nsend++, "d": code};
0
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251 var datareq = new XMLHttpRequest();
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252 datareq.onreadystatechange = postResponseHandler;
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John "Elwin" Edwards <elwin@sdf.org>
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253 datareq.open('POST', '/feed', true);
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254 datareq.send(JSON.stringify(formdata));
0
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255 //dkey(code);
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256 return;
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John "Elwin" Edwards <elwin@sdf.org>
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257 }
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John "Elwin" Edwards <elwin@sdf.org>
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258
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259 var charshifts = { '-': "5f", '=': "2b", '[': "7b", ']': "7d", '\\': "7c",
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260 ';': "3a", '\'': "22", ',': "3c", '.': "3e", '/': "3f", '`': "7e"
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261 }
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John "Elwin" Edwards <elwin@sdf.org>
parents:
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262
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John "Elwin" Edwards <elwin@sdf.org>
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263 function vkey(c) {
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John "Elwin" Edwards <elwin@sdf.org>
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diff changeset
264 var keystr;
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John "Elwin" Edwards <elwin@sdf.org>
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265 if (c.match(/^[a-z]$/)) {
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John "Elwin" Edwards <elwin@sdf.org>
parents:
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266 if (termemu.ctrlp()) {
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John "Elwin" Edwards <elwin@sdf.org>
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267 var n = c.charCodeAt(0) - 96;
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John "Elwin" Edwards <elwin@sdf.org>
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268 keystr = n.toString(16);
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John "Elwin" Edwards <elwin@sdf.org>
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269 if (keystr.length < 2)
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John "Elwin" Edwards <elwin@sdf.org>
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270 keystr = "0" + keystr;
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John "Elwin" Edwards <elwin@sdf.org>
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271 }
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John "Elwin" Edwards <elwin@sdf.org>
parents:
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272 else if (termemu.shiftp())
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John "Elwin" Edwards <elwin@sdf.org>
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273 keystr = c.toUpperCase().charCodeAt(0).toString(16);
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John "Elwin" Edwards <elwin@sdf.org>
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diff changeset
274 else
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John "Elwin" Edwards <elwin@sdf.org>
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275 keystr = c.charCodeAt(0).toString(16);
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John "Elwin" Edwards <elwin@sdf.org>
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276 }
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
277 else if (c.match(/^[0-9]$/)) {
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
278 if (termemu.shiftp())
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John "Elwin" Edwards <elwin@sdf.org>
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diff changeset
279 keystr = numShifts[c.charCodeAt(0) - 48].toString(16);
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John "Elwin" Edwards <elwin@sdf.org>
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280 else
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John "Elwin" Edwards <elwin@sdf.org>
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diff changeset
281 keystr = c.charCodeAt(0).toString(16);
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John "Elwin" Edwards <elwin@sdf.org>
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diff changeset
282 }
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John "Elwin" Edwards <elwin@sdf.org>
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diff changeset
283 else if (c == '\n')
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John "Elwin" Edwards <elwin@sdf.org>
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diff changeset
284 keystr = "0a";
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John "Elwin" Edwards <elwin@sdf.org>
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diff changeset
285 else if (c == '\t')
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John "Elwin" Edwards <elwin@sdf.org>
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diff changeset
286 keystr = "09";
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
287 else if (c == '\b')
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
288 keystr = "08";
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
289 else if (c == ' ')
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John "Elwin" Edwards <elwin@sdf.org>
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diff changeset
290 keystr = "20";
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
291 else if (c in charshifts) {
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
292 if (termemu.shiftp())
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
293 keystr = charshifts[c];
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
294 else
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
295 keystr = c.charCodeAt(0).toString(16);
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
296 }
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
297 else
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
298 return;
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
299 //writeData("Sending " + keystr);
70
d7eb63cd7a16 Try to get some compatibility for keys.
John "Elwin" Edwards <elwin@sdf.org>
parents: 58
diff changeset
300 var formdata = {"t": "d", "n": nsend++, "d": keystr};
0
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
301 var datareq = new XMLHttpRequest();
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
302 datareq.onreadystatechange = postResponseHandler;
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
303 datareq.open('POST', '/feed', true);
13
bf7c26d0b66d webtty: switch upward protocol to JSON
John "Elwin" Edwards <elwin@sdf.org>
parents: 12
diff changeset
304 datareq.send(JSON.stringify(formdata));
0
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
305 return;
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
306 }
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
307
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
308 function setup() {
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
309 keyHexCodes.init();
9
826a7ced69f8 Make the emulator screen resizable.
John "Elwin" Edwards <elwin@sdf.org>
parents: 7
diff changeset
310 termemu.init("termwrap", 24, 80);
0
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
311 setTitle("Not connected.");
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
312 return;
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
313 }
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
314
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
315 function toggleshift() {
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
316 termemu.toggleshift();
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
317 keydiv = document.getElementById("shiftkey");
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
318 if (termemu.shiftp())
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
319 keydiv.className = "keysel";
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
320 else
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
321 keydiv.className = "key";
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
322 return;
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
323 }
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
324
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
325 function togglectrl() {
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
326 termemu.togglectrl();
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
327 keydiv = document.getElementById("ctrlkey");
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
328 if (termemu.ctrlp())
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
329 keydiv.className = "keysel";
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
330 else
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
331 keydiv.className = "key";
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
332 return;
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
333 }
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
334
9
826a7ced69f8 Make the emulator screen resizable.
John "Elwin" Edwards <elwin@sdf.org>
parents: 7
diff changeset
335 function login(h, w) {
58
7a50b4412fea Move credentials into the drivers.
John "Elwin" Edwards <elwin@sdf.org>
parents: 14
diff changeset
336 if (isalive)
0
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
337 return;
13
bf7c26d0b66d webtty: switch upward protocol to JSON
John "Elwin" Edwards <elwin@sdf.org>
parents: 12
diff changeset
338 params = {"login": true, "h": h, "w": w};
0
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
339 var req = new XMLHttpRequest();
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
340 req.onreadystatechange = function () {
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
341 if (req.readyState == 4 && req.status == 200) {
10
d051aad3e95f webtty: begin experimenting with JSON protocol.
John "Elwin" Edwards <elwin@sdf.org>
parents: 9
diff changeset
342 var logindict = JSON.parse(req.responseText);
d051aad3e95f webtty: begin experimenting with JSON protocol.
John "Elwin" Edwards <elwin@sdf.org>
parents: 9
diff changeset
343 if (logindict.login) {
0
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
344 /* Success */
10
d051aad3e95f webtty: begin experimenting with JSON protocol.
John "Elwin" Edwards <elwin@sdf.org>
parents: 9
diff changeset
345 termemu.resize(logindict.h, logindict.w);
58
7a50b4412fea Move credentials into the drivers.
John "Elwin" Edwards <elwin@sdf.org>
parents: 14
diff changeset
346 isalive = true;
13
bf7c26d0b66d webtty: switch upward protocol to JSON
John "Elwin" Edwards <elwin@sdf.org>
parents: 12
diff changeset
347 nsend = 0;
14
155f3c104759 shterm.js: Client-side message ordering
John "Elwin" Edwards <elwin@sdf.org>
parents: 13
diff changeset
348 nrecv = 0;
0
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
349 setTitle("Logged in");
10
d051aad3e95f webtty: begin experimenting with JSON protocol.
John "Elwin" Edwards <elwin@sdf.org>
parents: 9
diff changeset
350 debug(1, "Logged in with id " + logindict.id);
0
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
351 getData();
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
352 return;
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
353 }
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
354 return;
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
355 }
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
356 };
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
357 req.open('POST', '/login', true);
13
bf7c26d0b66d webtty: switch upward protocol to JSON
John "Elwin" Edwards <elwin@sdf.org>
parents: 12
diff changeset
358 req.send(JSON.stringify(params));
bf7c26d0b66d webtty: switch upward protocol to JSON
John "Elwin" Edwards <elwin@sdf.org>
parents: 12
diff changeset
359 //req.send("login=login&h=" + String(h) + "&w=" + String(w));
0
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
360 return;
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
361 }
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
362
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
363 function stop() {
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
364 var req = new XMLHttpRequest();
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
365 req.onreadystatechange = function () {
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
366 if (req.readyState == 4 && req.status == 200) {
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
367 /* Figure out whether or not it worked. */
11
481dcee353c9 webtty: switch all server responses to JSON.
John "Elwin" Edwards <elwin@sdf.org>
parents: 10
diff changeset
368 /* FIXME the server might respond with output. */
58
7a50b4412fea Move credentials into the drivers.
John "Elwin" Edwards <elwin@sdf.org>
parents: 14
diff changeset
369 isalive = false;
0
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
370 return;
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
371 }
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
372 };
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
373 req.open('POST', '/feed', true);
13
bf7c26d0b66d webtty: switch upward protocol to JSON
John "Elwin" Edwards <elwin@sdf.org>
parents: 12
diff changeset
374 req.send(JSON.stringify({"t": "q", "n": nsend++}));
0
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
375 return;
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
376 }
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
377
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
378 function setTitle(tstr) {
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
379 var titlespan = document.getElementById("ttitle");
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
380 var tnode = document.createTextNode(tstr);
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
381 if (titlespan.childNodes.length == 0)
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
382 titlespan.appendChild(tnode);
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
383 else
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
384 titlespan.replaceChild(tnode, titlespan.childNodes[0]);
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
385 return;
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
386 }
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
387
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
388 function debug(level, msg) {
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
389 if (level < debugSuppress)
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
390 return;
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
391 var msgdiv = document.createElement("div");
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
392 var msgtext = document.createTextNode(msg);
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
393 msgdiv.appendChild(msgtext);
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
394 document.getElementById("debug").appendChild(msgdiv);
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
395 return;
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
396 }
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
397
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
398 /* This should be a termemu method. */
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
399 function textsize(larger) {
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
400 var cssSize = document.getElementById("term").style.fontSize;
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
401 if (!cssSize)
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
402 return;
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
403 var match = cssSize.match(/\d*/);
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
404 if (!match)
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
405 return;
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
406 var csize = Number(match[0]);
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
407 var nsize;
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
408 if (larger) {
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
409 if (csize >= 48)
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
410 nsize = 48;
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
411 else if (csize >= 20)
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
412 nsize = csize + 4;
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
413 else if (csize >= 12)
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
414 nsize = csize + 2;
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
415 else if (csize >= 8)
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
416 nsize = csize + 1;
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
417 else
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
418 nsize = 8;
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
419 }
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
420 else {
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
421 if (csize <= 8)
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
422 nsize = 8;
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
423 else if (csize <= 12)
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
424 nsize = csize - 1;
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
425 else if (csize <= 20)
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
426 nsize = csize - 2;
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
427 else if (csize <= 48)
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
428 nsize = csize - 4;
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
429 else
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
430 nsize = 48;
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
431 }
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
432 document.getElementById("term").style.fontSize = nsize.toString() + "px";
9
826a7ced69f8 Make the emulator screen resizable.
John "Elwin" Edwards <elwin@sdf.org>
parents: 7
diff changeset
433 termemu.fixsize();
0
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
434 debug(1, "Changing font size to " + nsize.toString());
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
435 return;
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
436 }
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
437
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
438 function bell(on) {
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
439 var imgnode = document.getElementById("bell");
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
440 if (on) {
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
441 imgnode.style.visibility = "visible";
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
442 window.setTimeout(bell, 1500, false);
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
443 }
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
444 else
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
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445 imgnode.style.visibility = "hidden";
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
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446 return;
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
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447 }
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
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448
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
449 function dkey(codestr) {
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
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450 var dstr = "Keystring: ";
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
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451 for (var i = 0; i < codestr.length; i += 2) {
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
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452 code = Number("0x" + codestr.substr(i, 2));
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
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453 if (code < 32 || (code >= 127 && code < 160))
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
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454 dstr += "\\x" + code.toString(16);
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
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455 else
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
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456 dstr += String.fromCharCode(code);
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
457 }
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
458 debug(1, dstr);
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
459 return;
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
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460 }