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annotate shterm.js @ 14:155f3c104759

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shterm.js: Client-side message ordering Make sure data from the server is written to the terminal emulator in the correct order. Out-of-order messages are stored in a queue until their turn comes.
author John "Elwin" Edwards <elwin@sdf.org>
date Tue, 15 May 2012 09:30:12 -0700
parents bf7c26d0b66d
children 7a50b4412fea
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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
14
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5 var nsend = 0; // The number of the next packet to send.
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6 var nrecv = 0; // The next packet expected.
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7 var msgQ = []; // Queue for out-of-order messages.
13
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8
0
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9 // A state machine that keeps track of polling the server.
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10 var ajaxstate = {
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11 state: 0,
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12 timerID: null,
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13 clear: function () {
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14 if (this.timerID != null) {
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15 window.clearTimeout(this.timerID);
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16 this.timerID = null;
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17 }
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18 },
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19 set: function (ms) {
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20 this.clear();
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21 this.timerID = window.setTimeout(getData, ms);
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22 },
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23 gotdata: function () {
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24 this.set(100);
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25 this.state = 0;
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26 },
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27 gotnothing: function () {
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28 if (this.state == 0) {
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29 this.set(100);
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30 this.state = 1;
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31 }
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32 else if (this.state == 1) {
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33 this.set(300);
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34 this.state = 2;
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35 }
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36 else if (this.state == 2) {
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37 this.set(1000);
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38 this.state = 3;
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39 }
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40 else {
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41 this.set(5000);
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42 this.state = 3;
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43 }
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44 },
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45 posted: function () {
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46 this.set(100);
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47 this.state = 0;
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48 }
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49 };
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50
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51 function writeData(hexstr) {
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52 var codenum;
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53 var codes = [];
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54 var nc;
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55 var u8wait = 0; /* Stores bits from previous bytes of multibyte sequences. */
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56 var expect = 0; /* The number of 10------ bytes expected. */
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57 /* UTF-8 translation. */
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58 for (var i = 0; i < hexstr.length; i += 2) {
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59 nc = Number("0x" + hexstr.substr(i, 2));
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60 if (nc < 0x7F) {
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61 /* 0------- */
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62 codes.push(nc);
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63 /* Any incomplete sequence will be discarded. */
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64 u8wait = 0;
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65 expect = 0;
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66 }
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67 else if (nc < 0xC0) {
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68 /* 10------ : part of a multibyte sequence */
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69 if (expect > 0) {
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70 u8wait <<= 6;
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71 u8wait += (nc & 0x3F);
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72 expect--;
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73 if (expect == 0) {
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74 codes.push(u8wait);
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75 u8wait = 0;
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76 }
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77 }
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78 else {
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79 /* Assume an initial byte was missed. */
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80 u8wait = 0;
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81 }
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82 }
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83 /* These will all discard any incomplete sequence. */
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84 else if (nc < 0xE0) {
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85 /* 110----- : introduces 2-byte sequence */
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86 u8wait = (nc & 0x1F);
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87 expect = 1;
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88 }
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89 else if (nc < 0xF0) {
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90 /* 1110---- : introduces 3-byte sequence */
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91 u8wait = (nc & 0x0F);
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92 expect = 2;
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93 }
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94 else if (nc < 0xF8) {
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95 /* 11110--- : introduces 4-byte sequence */
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96 u8wait = (nc & 0x07);
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97 expect = 3;
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98 }
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99 else if (nc < 0xFC) {
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100 /* 111110-- : introduces 5-byte sequence */
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101 u8wait = (nc & 0x03);
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102 expect = 4;
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103 }
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104 else if (nc < 0xFE) {
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105 /* 1111110- : introduces 6-byte sequence */
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106 u8wait = (nc & 0x01);
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107 expect = 5;
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108 }
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109 else {
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110 /* 1111111- : should never appear */
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111 u8wait = 0;
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112 expect = 0;
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113 }
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114 /* Supporting all 31 bits is probably overkill... */
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115 }
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116 termemu.write(codes);
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117 return;
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118 }
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119
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120 function processMsg(response) {
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121 if (response.t != "d" || typeof(response.d) != "string")
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122 return;
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123 if (response.n === nrecv) {
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124 writeData(response.d);
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125 nrecv++;
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126 var next;
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127 /* msgQ must be shifted every time nrecv is incremented, but the process
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128 * stops whenever an empty space, corresponding to an unarrived message,
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129 * is encountered.
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130 */
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131 while ((next = msgQ.shift()) !== undefined) {
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132 writeData(next.d);
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133 nrecv++;
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134 }
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135 }
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136 else if (response.n > nrecv) {
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137 /* The current message comes after one still missing. Queue this one
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138 * for later use.
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139 */
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140 debug(1, "Got packet " + response.n + ", expected " + nrecv);
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141 msgQ[response.n - nrecv - 1] = response;
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142 }
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143 else {
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144 /* This message's number was encountered previously. */
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145 debug(1, "Discarding packet " + response.n + ", expected " + nrecv);
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146 }
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147 }
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148
0
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diff changeset
149 function getData() {
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150 if (!termemu.alive)
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John "Elwin" Edwards <elwin@sdf.org>
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151 return;
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152 var datareq = new XMLHttpRequest();
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153 datareq.onreadystatechange = function () {
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154 if (datareq.readyState == 4 && datareq.status == 200) {
11
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155 var response = JSON.parse(this.responseText);
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156 if (!response.t)
0
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157 return;
11
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158 else if (response.t == "E") {
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diff changeset
159 if (response.c == 1) {
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diff changeset
160 termemu.alive = false;
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161 debug(1, "Server error: " + response.s);
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162 }
0
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163 }
11
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164 else if (response.t == "n")
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165 ajaxstate.gotnothing();
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166 else if (response.t == "d") {
14
155f3c104759 shterm.js: Client-side message ordering
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167 processMsg(response);
0
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168 ajaxstate.gotdata();
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John "Elwin" Edwards <elwin@sdf.org>
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169 }
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John "Elwin" Edwards <elwin@sdf.org>
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170 return;
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John "Elwin" Edwards <elwin@sdf.org>
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171 }
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John "Elwin" Edwards <elwin@sdf.org>
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172 };
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173 datareq.open('GET', '/feed', true);
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John "Elwin" Edwards <elwin@sdf.org>
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174 datareq.send(null);
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175 return;
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John "Elwin" Edwards <elwin@sdf.org>
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176 }
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John "Elwin" Edwards <elwin@sdf.org>
parents:
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177
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John "Elwin" Edwards <elwin@sdf.org>
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178 function postResponseHandler() {
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179 if (this.readyState == 4 && this.status == 200) {
11
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180 var response = JSON.parse(this.responseText);
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181 if (!response.t || response.t == "n")
0
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182 return;
11
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183 else if (response.t == "E") {
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184 if (response.c == 1) {
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185 termemu.alive = false;
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186 debug(1, "Server error: " + response.s);
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187 }
0
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188 return;
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John "Elwin" Edwards <elwin@sdf.org>
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189 }
11
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190 else if (response.t != "d")
0
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191 return;
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John "Elwin" Edwards <elwin@sdf.org>
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192 /* It is a data message */
11
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diff changeset
193 if (response.d) {
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194 processMsg(response);
155f3c104759 shterm.js: Client-side message ordering
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195 //debug(1, "Got packet " + response.n);
0
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196 }
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John "Elwin" Edwards <elwin@sdf.org>
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197 ajaxstate.posted();
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John "Elwin" Edwards <elwin@sdf.org>
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198 return;
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John "Elwin" Edwards <elwin@sdf.org>
parents:
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199 }
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
200 }
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John "Elwin" Edwards <elwin@sdf.org>
parents:
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201
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
202 function sendback(str) {
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203 /* For responding to terminal queries. */
13
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diff changeset
204 var formdata = {"t": "d", "n": nsend++, "d": str};
0
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205 var datareq = new XMLHttpRequest();
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John "Elwin" Edwards <elwin@sdf.org>
parents:
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206 datareq.onreadystatechange = postResponseHandler;
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John "Elwin" Edwards <elwin@sdf.org>
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207 datareq.open('POST', '/feed', true);
13
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diff changeset
208 datareq.send(JSON.stringify(formdata));
0
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209 return;
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John "Elwin" Edwards <elwin@sdf.org>
parents:
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210 }
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
211
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John "Elwin" Edwards <elwin@sdf.org>
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212 function sendkey(ev) {
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John "Elwin" Edwards <elwin@sdf.org>
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213 var keynum = ev.keyCode;
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John "Elwin" Edwards <elwin@sdf.org>
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214 var code;
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
215 if (keynum >= ev.DOM_VK_A && keynum <= ev.DOM_VK_Z) {
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
216 /* Letters. This assumes the codes are 65-90. */
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John "Elwin" Edwards <elwin@sdf.org>
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diff changeset
217 if (ev.ctrlKey)
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John "Elwin" Edwards <elwin@sdf.org>
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218 keynum -= 64;
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John "Elwin" Edwards <elwin@sdf.org>
parents:
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219 else if (!ev.shiftKey)
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John "Elwin" Edwards <elwin@sdf.org>
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220 keynum += 32;
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John "Elwin" Edwards <elwin@sdf.org>
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221 code = keynum.toString(16);
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
222 if (code.length < 2)
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John "Elwin" Edwards <elwin@sdf.org>
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223 code = "0" + code;
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John "Elwin" Edwards <elwin@sdf.org>
parents:
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224 }
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
225 else if (keynum >= ev.DOM_VK_0 && keynum <= ev.DOM_VK_9) {
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
226 /* The number row. */
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John "Elwin" Edwards <elwin@sdf.org>
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diff changeset
227 if (ev.shiftKey) {
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John "Elwin" Edwards <elwin@sdf.org>
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228 code = numShifts[keynum - 48].toString(16);
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John "Elwin" Edwards <elwin@sdf.org>
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229 }
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
230 else {
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
231 code = keynum.toString(16);
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John "Elwin" Edwards <elwin@sdf.org>
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232 }
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John "Elwin" Edwards <elwin@sdf.org>
parents:
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233 }
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
234 else if (keynum in keyHexCodes) {
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
235 if (ev.shiftKey)
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John "Elwin" Edwards <elwin@sdf.org>
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diff changeset
236 code = keyHexCodes[keynum][1];
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John "Elwin" Edwards <elwin@sdf.org>
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diff changeset
237 else
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
238 code = keyHexCodes[keynum][0];
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John "Elwin" Edwards <elwin@sdf.org>
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diff changeset
239 }
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
240 else if (keynum == ev.DOM_VK_SHIFT || keynum == ev.DOM_VK_CONTROL ||
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John "Elwin" Edwards <elwin@sdf.org>
parents:
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241 keynum == ev.DOM_VK_ALT || keynum == ev.DOM_VK_CAPS_LOCK) {
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John "Elwin" Edwards <elwin@sdf.org>
parents:
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242 return;
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
243 }
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
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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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
247 }
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John "Elwin" Edwards <elwin@sdf.org>
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diff changeset
248 if (termemu.alive)
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John "Elwin" Edwards <elwin@sdf.org>
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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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diff changeset
251 var datareq = new XMLHttpRequest();
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John "Elwin" Edwards <elwin@sdf.org>
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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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John "Elwin" Edwards <elwin@sdf.org>
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255 //dkey(code);
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John "Elwin" Edwards <elwin@sdf.org>
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256 return;
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John "Elwin" Edwards <elwin@sdf.org>
parents:
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257 }
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
258
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John "Elwin" Edwards <elwin@sdf.org>
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diff changeset
259 var charshifts = { '-': "5f", '=': "2b", '[': "7b", ']': "7d", '\\': "7c",
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260 ';': "3a", '\'': "22", ',': "3c", '.': "3e", '/': "3f", '`': "7e"
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John "Elwin" Edwards <elwin@sdf.org>
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261 }
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
262
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
263 function vkey(c) {
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
264 var keystr;
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
265 if (c.match(/^[a-z]$/)) {
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
266 if (termemu.ctrlp()) {
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
267 var n = c.charCodeAt(0) - 96;
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John "Elwin" Edwards <elwin@sdf.org>
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diff changeset
268 keystr = n.toString(16);
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
269 if (keystr.length < 2)
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John "Elwin" Edwards <elwin@sdf.org>
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270 keystr = "0" + keystr;
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
271 }
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
272 else if (termemu.shiftp())
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John "Elwin" Edwards <elwin@sdf.org>
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diff changeset
273 keystr = c.toUpperCase().charCodeAt(0).toString(16);
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John "Elwin" Edwards <elwin@sdf.org>
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diff changeset
274 else
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John "Elwin" Edwards <elwin@sdf.org>
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diff changeset
275 keystr = c.charCodeAt(0).toString(16);
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
276 }
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
277 else if (c.match(/^[0-9]$/)) {
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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>
parents:
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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diff changeset
280 else
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
281 keystr = c.charCodeAt(0).toString(16);
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
282 }
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
283 else if (c == '\n')
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
284 keystr = "0a";
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
285 else if (c == '\t')
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John "Elwin" Edwards <elwin@sdf.org>
parents:
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>
parents:
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);
13
bf7c26d0b66d webtty: switch upward protocol to JSON
John "Elwin" Edwards <elwin@sdf.org>
parents: 12
diff changeset
300 var formdata = {"t": "d", "n": nsend++, "d": code};
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.");
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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");
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John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
318 if (termemu.shiftp())
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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) {
0
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
336 if (termemu.alive)
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);
0
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
346 termemu.alive = 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. */
0
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
diff changeset
369 termemu.alive = false;
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:
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444 else
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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:
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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:
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457 }
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
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458 debug(1, dstr);
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
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459 return;
bd412f63ce0d Put this project under version control, finally.
John "Elwin" Edwards <elwin@sdf.org>
parents:
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460 }