Mercurial > hg > rlgwebd
annotate shterm.js @ 73:d084610a89b5
Automatically update the lists of current games and actions.
Add some window.*interval() code to getcurrent() so it will register
itself as an interval and clear this interval when the list is not
visible (i.e. playing or watching.) It also calls getchoices() if the
user is logged in, so that will be updated as well.
author | John "Elwin" Edwards <elwin@sdf.org> |
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date | Thu, 21 Jun 2012 21:57:04 -0700 |
parents | d7eb63cd7a16 |
children | a497ecd116d9 |
rev | line source |
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1 | 1 /* shterm.js: browser-side JavaScript to handle I/O for termemu.js when it |
2 * is running a shell via the webtty.js server. | |
3 */ | |
4 | |
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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. |
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9 |
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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 |
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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 |
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150 function getData() { |
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151 if (!isalive) |
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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) { |
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156 var response = JSON.parse(this.responseText); |
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157 if (!response.t) |
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158 return; |
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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; |
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162 debug(1, "Server error: " + response.s); |
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163 } |
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164 } |
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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") { |
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168 processMsg(response); |
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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") |
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183 return; |
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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 } |
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189 return; |
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190 } |
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191 else if (response.t != "d") |
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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); |
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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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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}; |
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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)); |
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210 return; |
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211 } |
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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. */ |
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218 if (ev.ctrlKey) |
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219 keynum -= 64; |
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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 } |
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226 else if (keynum >= 48 && keynum <= 57) { |
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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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234 } |
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235 else if (keynum in keyHexCodes) { |
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236 if (ev.shiftKey) |
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237 code = keyHexCodes[keynum][1]; |
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238 else |
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239 code = keyHexCodes[keynum][0]; |
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240 } |
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241 else if (keynum >= 16 && keynum <= 20) { |
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242 return; |
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243 } |
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244 else { |
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245 debug(1, "Ignoring keycode " + keynum); |
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246 return; |
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247 } |
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248 if (isalive) |
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249 ev.preventDefault(); |
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250 var formdata = {"t": "d", "n": nsend++, "d": code}; |
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251 var datareq = new XMLHttpRequest(); |
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252 datareq.onreadystatechange = postResponseHandler; |
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253 datareq.open('POST', '/feed', true); |
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254 datareq.send(JSON.stringify(formdata)); |
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255 //dkey(code); |
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256 return; |
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257 } |
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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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262 |
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263 function vkey(c) { |
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264 var keystr; |
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265 if (c.match(/^[a-z]$/)) { |
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266 if (termemu.ctrlp()) { |
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267 var n = c.charCodeAt(0) - 96; |
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268 keystr = n.toString(16); |
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269 if (keystr.length < 2) |
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270 keystr = "0" + keystr; |
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271 } |
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272 else if (termemu.shiftp()) |
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273 keystr = c.toUpperCase().charCodeAt(0).toString(16); |
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274 else |
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275 keystr = c.charCodeAt(0).toString(16); |
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276 } |
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277 else if (c.match(/^[0-9]$/)) { |
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278 if (termemu.shiftp()) |
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279 keystr = numShifts[c.charCodeAt(0) - 48].toString(16); |
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280 else |
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281 keystr = c.charCodeAt(0).toString(16); |
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282 } |
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283 else if (c == '\n') |
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284 keystr = "0a"; |
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285 else if (c == '\t') |
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286 keystr = "09"; |
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287 else if (c == '\b') |
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288 keystr = "08"; |
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289 else if (c == ' ') |
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290 keystr = "20"; |
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291 else if (c in charshifts) { |
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292 if (termemu.shiftp()) |
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293 keystr = charshifts[c]; |
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294 else |
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295 keystr = c.charCodeAt(0).toString(16); |
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296 } |
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297 else |
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298 return; |
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299 //writeData("Sending " + keystr); |
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300 var formdata = {"t": "d", "n": nsend++, "d": keystr}; |
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301 var datareq = new XMLHttpRequest(); |
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302 datareq.onreadystatechange = postResponseHandler; |
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303 datareq.open('POST', '/feed', true); |
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304 datareq.send(JSON.stringify(formdata)); |
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305 return; |
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306 } |
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307 |
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308 function setup() { |
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309 keyHexCodes.init(); |
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310 termemu.init("termwrap", 24, 80); |
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311 setTitle("Not connected."); |
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312 return; |
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313 } |
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314 |
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315 function toggleshift() { |
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316 termemu.toggleshift(); |
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317 keydiv = document.getElementById("shiftkey"); |
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318 if (termemu.shiftp()) |
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319 keydiv.className = "keysel"; |
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320 else |
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321 keydiv.className = "key"; |
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322 return; |
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323 } |
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324 |
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325 function togglectrl() { |
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326 termemu.togglectrl(); |
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327 keydiv = document.getElementById("ctrlkey"); |
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328 if (termemu.ctrlp()) |
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329 keydiv.className = "keysel"; |
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330 else |
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331 keydiv.className = "key"; |
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332 return; |
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333 } |
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334 |
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335 function login(h, w) { |
58
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336 if (isalive) |
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337 return; |
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338 params = {"login": true, "h": h, "w": w}; |
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339 var req = new XMLHttpRequest(); |
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340 req.onreadystatechange = function () { |
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341 if (req.readyState == 4 && req.status == 200) { |
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342 var logindict = JSON.parse(req.responseText); |
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343 if (logindict.login) { |
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344 /* Success */ |
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345 termemu.resize(logindict.h, logindict.w); |
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346 isalive = true; |
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347 nsend = 0; |
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shterm.js: Client-side message ordering
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348 nrecv = 0; |
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349 setTitle("Logged in"); |
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350 debug(1, "Logged in with id " + logindict.id); |
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351 getData(); |
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352 return; |
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353 } |
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354 return; |
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355 } |
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356 }; |
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357 req.open('POST', '/login', true); |
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358 req.send(JSON.stringify(params)); |
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359 //req.send("login=login&h=" + String(h) + "&w=" + String(w)); |
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360 return; |
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361 } |
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362 |
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363 function stop() { |
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364 var req = new XMLHttpRequest(); |
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365 req.onreadystatechange = function () { |
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366 if (req.readyState == 4 && req.status == 200) { |
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367 /* Figure out whether or not it worked. */ |
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368 /* FIXME the server might respond with output. */ |
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369 isalive = false; |
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370 return; |
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371 } |
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372 }; |
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373 req.open('POST', '/feed', true); |
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374 req.send(JSON.stringify({"t": "q", "n": nsend++})); |
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375 return; |
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376 } |
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377 |
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378 function setTitle(tstr) { |
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379 var titlespan = document.getElementById("ttitle"); |
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380 var tnode = document.createTextNode(tstr); |
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381 if (titlespan.childNodes.length == 0) |
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382 titlespan.appendChild(tnode); |
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383 else |
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384 titlespan.replaceChild(tnode, titlespan.childNodes[0]); |
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385 return; |
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386 } |
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387 |
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388 function debug(level, msg) { |
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389 if (level < debugSuppress) |
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390 return; |
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391 var msgdiv = document.createElement("div"); |
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392 var msgtext = document.createTextNode(msg); |
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393 msgdiv.appendChild(msgtext); |
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394 document.getElementById("debug").appendChild(msgdiv); |
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395 return; |
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396 } |
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397 |
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398 /* This should be a termemu method. */ |
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399 function textsize(larger) { |
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400 var cssSize = document.getElementById("term").style.fontSize; |
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401 if (!cssSize) |
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402 return; |
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403 var match = cssSize.match(/\d*/); |
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404 if (!match) |
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405 return; |
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406 var csize = Number(match[0]); |
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407 var nsize; |
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408 if (larger) { |
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409 if (csize >= 48) |
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410 nsize = 48; |
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411 else if (csize >= 20) |
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412 nsize = csize + 4; |
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413 else if (csize >= 12) |
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414 nsize = csize + 2; |
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415 else if (csize >= 8) |
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416 nsize = csize + 1; |
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417 else |
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418 nsize = 8; |
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419 } |
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420 else { |
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421 if (csize <= 8) |
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422 nsize = 8; |
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423 else if (csize <= 12) |
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424 nsize = csize - 1; |
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425 else if (csize <= 20) |
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426 nsize = csize - 2; |
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427 else if (csize <= 48) |
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428 nsize = csize - 4; |
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429 else |
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430 nsize = 48; |
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431 } |
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432 document.getElementById("term").style.fontSize = nsize.toString() + "px"; |
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433 termemu.fixsize(); |
0
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434 debug(1, "Changing font size to " + nsize.toString()); |
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435 return; |
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436 } |
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437 |
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438 function bell(on) { |
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439 var imgnode = document.getElementById("bell"); |
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440 if (on) { |
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441 imgnode.style.visibility = "visible"; |
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442 window.setTimeout(bell, 1500, false); |
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443 } |
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444 else |
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445 imgnode.style.visibility = "hidden"; |
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446 return; |
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447 } |
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448 |
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449 function dkey(codestr) { |
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450 var dstr = "Keystring: "; |
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451 for (var i = 0; i < codestr.length; i += 2) { |
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452 code = Number("0x" + codestr.substr(i, 2)); |
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453 if (code < 32 || (code >= 127 && code < 160)) |
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454 dstr += "\\x" + code.toString(16); |
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455 else |
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456 dstr += String.fromCharCode(code); |
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457 } |
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458 debug(1, dstr); |
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459 return; |
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460 } |