1 | /* |
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2 | lcddevice.cpp |
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3 | |
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4 | a MythTV project object to control an |
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5 | LCDproc server |
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6 | |
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7 | (c) 2002, 2003 Thor Sigvaldason, Dan Morphis and Isaac Richards |
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8 | */ |
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9 | |
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10 | #include "lcddevice.h" |
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11 | #include "mythcontext.h" |
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12 | #include "mythdialogs.h" |
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13 | |
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14 | #include <unistd.h> |
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15 | #include <cmath> |
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16 | |
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17 | #include <qapplication.h> |
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18 | #include <qregexp.h> |
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19 | |
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20 | |
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21 | /* |
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22 | LCD_DEVICE_DEBUG control how much debug info we get |
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23 | 0 = none |
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24 | 1 = LCDServer info |
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25 | 2 = screen switch info |
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26 | 5 = every command received |
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27 | 10 = every command sent and error received |
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28 | */ |
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29 | |
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30 | #define LCD_DEVICE_DEBUG 0 |
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31 | |
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32 | LCD::LCD() |
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33 | :QObject(NULL, "LCD") |
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34 | { |
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35 | // Constructor for LCD |
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36 | // |
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37 | // Note that this does *not* include opening the socket and initiating |
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38 | // communications with the LDCd daemon. |
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39 | |
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40 | #if LCD_DEVICE_DEBUG > 0 |
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41 | VERBOSE(VB_ALL, "lcddevice: An LCD object now exists (LCD() was called)"); |
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42 | #endif |
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43 | |
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44 | GetLEDMask = NULL; |
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45 | |
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46 | socket = new QSocket(this); |
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47 | connect(socket, SIGNAL(error(int)), this, SLOT(veryBadThings(int))); |
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48 | connect(socket, SIGNAL(readyRead()), this, SLOT(serverSendingData())); |
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49 | |
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50 | lcd_ready = false; |
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51 | |
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52 | hostname = "localhost"; |
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53 | port = 6545; |
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54 | |
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55 | connected = false; |
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56 | send_buffer = ""; |
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57 | |
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58 | retryTimer = new QTimer(this); |
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59 | connect(retryTimer, SIGNAL(timeout()), this, SLOT(restartConnection())); |
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60 | |
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61 | LEDTimer = new QTimer(this); |
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62 | connect(LEDTimer, SIGNAL(timeout()), this, SLOT(outputLEDs())); |
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63 | } |
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64 | |
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65 | bool LCD::m_server_unavailable = false; |
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66 | class LCD * LCD::m_lcd = NULL; |
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67 | |
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68 | class LCD * LCD::Get(void) |
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69 | { |
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70 | if (m_lcd == NULL && m_server_unavailable == false) |
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71 | m_lcd = new LCD; |
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72 | return m_lcd; |
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73 | } |
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74 | |
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75 | void LCD::SetupLCD (void) |
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76 | { |
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77 | QString lcd_host; |
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78 | int lcd_port; |
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79 | |
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80 | if (m_lcd) |
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81 | { |
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82 | delete m_lcd; |
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83 | m_lcd = NULL; |
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84 | m_server_unavailable = false; |
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85 | } |
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86 | |
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87 | lcd_host = gContext->GetSetting("LCDServerHost", "localhost"); |
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88 | lcd_port = gContext->GetNumSetting("LCDServerPort", 6545); |
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89 | |
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90 | if (lcd_host.length() > 0 && lcd_port > 1024) |
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91 | { |
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92 | class LCD * lcd = LCD::Get(); |
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93 | if (lcd->connectToHost(lcd_host, lcd_port) == false) |
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94 | { |
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95 | delete m_lcd; |
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96 | m_lcd = NULL; |
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97 | m_server_unavailable = false; |
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98 | } |
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99 | } |
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100 | } |
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101 | |
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102 | bool LCD::connectToHost(const QString &lhostname, unsigned int lport) |
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103 | { |
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104 | #if LCD_DEVICE_DEBUG > 0 |
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105 | VERBOSE(VB_ALL, "lcddevice: connecting to host: " |
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106 | << lhostname << " - port: " << lport); |
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107 | #endif |
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108 | |
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109 | // Open communications |
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110 | // Store the hostname and port in case we need to reconnect. |
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111 | |
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112 | int timeout = 1000; |
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113 | hostname = lhostname; |
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114 | port = lport; |
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115 | |
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116 | // Don't even try to connect if we're currently disabled. |
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117 | if (!gContext->GetNumSetting("LCDEnable", 0)) |
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118 | { |
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119 | connected = false; |
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120 | m_server_unavailable = true; |
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121 | return connected; |
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122 | } |
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123 | |
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124 | // check if the 'mythlcdserver' is running |
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125 | int res = system("ret=`ps cax | grep -c mythlcdserver`; exit $ret"); |
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126 | if (WIFEXITED(res)) |
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127 | res = WEXITSTATUS(res); |
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128 | |
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129 | if (res == 0) |
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130 | { |
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131 | // we need to start the mythlcdserver |
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132 | system(gContext->GetInstallPrefix() + "/bin/mythlcdserver&"); |
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133 | } |
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134 | |
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135 | if (!connected) |
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136 | { |
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137 | QTextStream os(socket); |
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138 | socket->connectToHost(hostname, port); |
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139 | |
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140 | while (--timeout && socket->state() != QSocket::Idle) |
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141 | { |
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142 | qApp->lock(); |
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143 | qApp->processEvents(); |
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144 | qApp->unlock(); |
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145 | usleep(1000); |
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146 | |
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147 | if (socket->state() == QSocket::Connected) |
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148 | { |
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149 | lcd_ready = true; |
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150 | connected = true; |
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151 | os << "HELLO\n"; |
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152 | break; |
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153 | } |
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154 | } |
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155 | } |
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156 | |
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157 | if (connected == false) |
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158 | m_server_unavailable = true; |
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159 | |
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160 | return connected; |
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161 | } |
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162 | |
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163 | void LCD::sendToServer(const QString &someText) |
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164 | { |
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165 | // Check the socket, make sure the connection is still up |
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166 | if (socket->state() == QSocket::Idle) |
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167 | { |
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168 | if (!lcd_ready) |
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169 | return; |
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170 | |
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171 | lcd_ready = false; |
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172 | |
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173 | // Ack, connection to server has been severed try to re-establish the |
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174 | // connection |
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175 | retryTimer->start(10000, false); |
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176 | VERBOSE(VB_ALL, "lcddevice: Connection to LCDServer died unexpectedly.\n\t\t\t" |
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177 | "Trying to reconnect every 10 seconds. . ."); |
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178 | return; |
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179 | } |
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180 | |
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181 | QTextStream os(socket); |
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182 | |
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183 | last_command = someText; |
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184 | |
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185 | if (connected) |
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186 | { |
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187 | #if LCD_DEVICE_DEBUG > 9 |
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188 | VERBOSE(VB_ALL, "lcddevice: Sending to Server: " << someText); |
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189 | #endif |
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190 | // Just stream the text out the socket |
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191 | |
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192 | os << someText << "\n"; |
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193 | } |
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194 | else |
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195 | { |
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196 | // Buffer this up in the hope that the connection will open soon |
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197 | |
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198 | send_buffer += someText; |
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199 | send_buffer += "\n"; |
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200 | } |
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201 | } |
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202 | |
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203 | void LCD::restartConnection() |
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204 | { |
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205 | // Reset the flag |
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206 | lcd_ready = false; |
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207 | connected = false; |
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208 | m_server_unavailable = false; |
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209 | |
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210 | // Retry to connect. . . Maybe the user restarted LCDd? |
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211 | connectToHost(hostname, port); |
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212 | } |
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213 | |
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214 | void LCD::serverSendingData() |
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215 | { |
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216 | QString lineFromServer, tempString; |
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217 | QStringList aList; |
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218 | QStringList::Iterator it; |
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219 | |
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220 | // This gets activated automatically by the QSocket class whenever |
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221 | // there's something to read. |
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222 | // |
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223 | // We currently spend most of our time (except for the first line sent |
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224 | // back) ignoring it. |
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225 | // |
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226 | // Note that if anyone has an LCDproc type lcd with buttons on it, this is |
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227 | // where we would want to catch button presses and make the rest of |
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228 | // mythTV/mythMusic do something (change tracks, channels, etc.) |
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229 | |
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230 | while(socket->canReadLine()) |
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231 | { |
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232 | lineFromServer = socket->readLine(); |
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233 | lineFromServer = lineFromServer.replace( QRegExp("\n"), "" ); |
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234 | lineFromServer = lineFromServer.replace( QRegExp("\r"), "" ); |
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235 | lineFromServer.simplifyWhiteSpace(); |
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236 | |
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237 | #if LCD_DEVICE_DEBUG > 4 |
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238 | // Make debugging be less noisy |
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239 | if (lineFromServer != "OK\n") |
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240 | VERBOSE(VB_ALL, "lcddevice: Received from server: " << lineFromServer); |
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241 | #endif |
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242 | |
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243 | aList = QStringList::split(" ", lineFromServer); |
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244 | if (aList[0] == "CONNECTED") |
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245 | { |
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246 | // We got "CONNECTED", which is a response to "HELLO" |
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247 | lcd_ready = true; |
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248 | |
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249 | // get lcd width & height |
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250 | if (aList.count() != 3) |
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251 | { |
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252 | VERBOSE(VB_ALL, "lcddevice: received bad no. of arguments " |
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253 | "in CONNECTED response from LCDServer"); |
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254 | } |
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255 | |
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256 | bool bOK; |
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257 | lcd_width = aList[1].toInt(&bOK); |
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258 | if (!bOK) |
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259 | { |
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260 | VERBOSE(VB_ALL, "lcddevice: received bad int for width" |
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261 | "in CONNECTED response from LCDServer"); |
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262 | } |
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263 | |
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264 | lcd_height = aList[2].toInt(&bOK); |
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265 | if (!bOK) |
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266 | { |
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267 | VERBOSE(VB_ALL, "lcddevice: received bad int for height" |
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268 | "in CONNECTED response from LCDServer"); |
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269 | } |
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270 | |
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271 | init(); |
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272 | } |
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273 | else if (aList[0] == "HUH?") |
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274 | { |
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275 | VERBOSE(VB_ALL, "lcddevice: WARNING: Something is getting passed" |
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276 | "to LCDServer that it doesn't understand"); |
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277 | VERBOSE(VB_ALL, "lcddevice: last command: " << last_command); |
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278 | } |
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279 | else if (aList[0] == "KEY") |
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280 | handleKeyPress(aList.last().stripWhiteSpace()); |
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281 | } |
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282 | } |
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283 | |
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284 | void LCD::handleKeyPress(QString key_pressed) |
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285 | { |
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286 | int key = 0; |
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287 | |
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288 | QChar mykey = key_pressed.at(0); |
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289 | if (mykey == lcd_keystring.at(0)) |
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290 | key = Qt::Key_Up; |
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291 | else if (mykey == lcd_keystring.at(1)) |
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292 | key = Qt::Key_Down; |
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293 | else if (mykey == lcd_keystring.at(2)) |
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294 | key = Qt::Key_Left; |
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295 | else if (mykey == lcd_keystring.at(3)) |
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296 | key = Qt::Key_Right; |
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297 | else if (mykey == lcd_keystring.at(4)) |
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298 | key = Qt::Key_Space; |
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299 | else if (mykey == lcd_keystring.at(5)) |
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300 | key = Qt::Key_Escape; |
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301 | |
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302 | QApplication::postEvent(gContext->GetMainWindow(), |
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303 | new ExternalKeycodeEvent(key)); |
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304 | } |
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305 | |
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306 | void LCD::init() |
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307 | { |
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308 | // Stop the timer |
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309 | retryTimer->stop(); |
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310 | |
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311 | // Get LCD settings |
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312 | lcd_showmusic = (gContext->GetSetting("LCDShowMusic", "1") == "1"); |
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313 | lcd_showtime = (gContext->GetSetting("LCDShowTime", "1") == "1"); |
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314 | lcd_showchannel = (gContext->GetSetting("LCDShowChannel", "1") == "1"); |
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315 | lcd_showgeneric = (gContext->GetSetting("LCDShowGeneric", "1") == "1"); |
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316 | lcd_showvolume = (gContext->GetSetting("LCDShowVolume", "1") == "1"); |
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317 | lcd_showmenu = (gContext->GetSetting("LCDShowMenu", "1") == "1"); |
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318 | lcd_showrecstatus = (gContext->GetSetting("LCDShowRecStatus", "1") == "1"); |
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319 | lcd_keystring = gContext->GetSetting("LCDKeyString", "ABCDEF"); |
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320 | |
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321 | connected = TRUE; |
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322 | lcd_ready = true; |
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323 | |
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324 | // send buffer if there's anything in there |
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325 | if (send_buffer.length() > 0) |
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326 | { |
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327 | sendToServer(send_buffer); |
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328 | send_buffer = ""; |
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329 | } |
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330 | } |
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331 | |
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332 | void LCD::veryBadThings(int anError) |
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333 | { |
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334 | // Deal with failures to connect and inabilities to communicate |
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335 | |
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336 | QString err; |
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337 | |
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338 | if (anError == QSocket::ErrConnectionRefused) |
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339 | err = "connection refused."; |
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340 | else if (anError == QSocket::ErrHostNotFound) |
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341 | err = "host not found."; |
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342 | else if (anError == QSocket::ErrSocketRead) |
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343 | err = "socket read failed."; |
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344 | else |
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345 | err = "unknown error."; |
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346 | |
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347 | VERBOSE(VB_IMPORTANT, QString("Could not connect to LCDServer: %1").arg(err)); |
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348 | socket->clearPendingData(); |
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349 | socket->close(); |
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350 | } |
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351 | |
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352 | void LCD::stopAll() |
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353 | { |
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354 | if (!lcd_ready) |
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355 | return; |
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356 | |
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357 | #if LCD_DEVICE_DEBUG > 1 |
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358 | VERBOSE(VB_ALL, "lcddevice: stopAll"); |
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359 | #endif |
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360 | |
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361 | sendToServer("STOP_ALL"); |
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362 | } |
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363 | |
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364 | void LCD::setChannelProgress(float value) |
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365 | { |
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366 | if (!lcd_ready || !lcd_showchannel) |
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367 | return; |
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368 | |
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369 | if (value < 0.0) |
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370 | value = 0.0; |
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371 | else if (value > 1.0) |
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372 | value = 1.0; |
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373 | |
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374 | sendToServer("SET_CHANNEL_PROGRESS " + QString().setNum(value)); |
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375 | } |
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376 | |
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377 | void LCD::setGenericProgress(float value) |
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378 | { |
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379 | if (!lcd_ready || !lcd_showgeneric) |
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380 | return; |
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381 | |
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382 | if (value < 0.0) |
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383 | value = 0.0; |
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384 | else if (value > 1.0) |
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385 | value = 1.0; |
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386 | |
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387 | sendToServer("SET_GENERIC_PROGRESS " + QString().setNum(value)); |
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388 | } |
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389 | |
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390 | void LCD::setMusicProgress(QString time, float value) |
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391 | { |
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392 | if (!lcd_ready || !lcd_showmusic) |
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393 | return; |
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394 | |
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395 | if (value < 0.0) |
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396 | value = 0.0; |
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397 | else if (value > 1.0) |
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398 | value = 1.0; |
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399 | |
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400 | sendToServer("SET_MUSIC_PROGRESS " + quotedString(time) + " " + |
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401 | QString().setNum(value)); |
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402 | } |
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403 | |
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404 | void LCD::setVolumeLevel(float value) |
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405 | { |
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406 | if (!lcd_ready || !lcd_showvolume) |
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407 | return; |
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408 | |
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409 | if (value < 0.0) |
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410 | value = 0.0; |
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411 | else if (value > 1.0) |
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412 | value = 1.0; |
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413 | |
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414 | sendToServer("SET_VOLUME_LEVEL " + QString().setNum(value)); |
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415 | } |
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416 | |
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417 | void LCD::setupLEDs(int(*LedMaskFunc)(void)) |
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418 | { |
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419 | GetLEDMask = LedMaskFunc; |
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420 | // update LED status every 10 seconds |
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421 | LEDTimer->start(10000, FALSE); |
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422 | } |
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423 | |
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424 | void LCD::outputLEDs() |
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425 | { |
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426 | QString aString; |
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427 | int mask = 0; |
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428 | if (0 && GetLEDMask) |
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429 | mask = GetLEDMask(); |
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430 | aString = "UPDATE_LEDS "; |
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431 | aString += QString::number(mask); |
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432 | sendToServer(aString); |
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433 | } |
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434 | |
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435 | void LCD::switchToTime() |
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436 | { |
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437 | if (!lcd_ready || !lcd_showtime) |
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438 | return; |
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439 | |
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440 | #if LCD_DEVICE_DEBUG > 1 |
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441 | VERBOSE(VB_ALL, "lcddevice: switchToTime"); |
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442 | #endif |
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443 | |
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444 | sendToServer("SWITCH_TO_TIME"); |
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445 | } |
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446 | |
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447 | void LCD::switchToMusic(const QString &artist, const QString &album, const QString &track) |
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448 | { |
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449 | if (!lcd_ready || !lcd_showmusic) |
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450 | return; |
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451 | |
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452 | #if LCD_DEVICE_DEBUG > 1 |
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453 | VERBOSE(VB_ALL, "lcddevice: switchToMusic"); |
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454 | #endif |
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455 | |
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456 | sendToServer("SWITCH_TO_MUSIC " + quotedString(artist) + " " |
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457 | + quotedString(album) + " " |
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458 | + quotedString(track)); |
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459 | } |
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460 | |
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461 | void LCD::switchToChannel(QString channum, QString title, QString subtitle) |
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462 | { |
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463 | if (!lcd_ready || !lcd_showchannel) |
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464 | return; |
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465 | |
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466 | #if LCD_DEVICE_DEBUG > 1 |
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467 | VERBOSE(VB_ALL, "lcddevice: switchToChannel"); |
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468 | #endif |
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469 | |
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470 | sendToServer("SWITCH_TO_CHANNEL " + quotedString(channum) + " " |
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471 | + quotedString(title) + " " |
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472 | + quotedString(subtitle)); |
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473 | } |
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474 | |
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475 | void LCD::switchToMenu(QPtrList<LCDMenuItem> *menuItems, QString app_name, |
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476 | bool popMenu) |
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477 | { |
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478 | if (!lcd_ready || !lcd_showmenu) |
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479 | return; |
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480 | |
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481 | #if LCD_DEVICE_DEBUG > 1 |
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482 | VERBOSE(VB_ALL, "lcddevice: switchToMenu"); |
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483 | #endif |
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484 | |
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485 | if (menuItems->isEmpty()) |
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486 | return; |
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487 | |
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488 | QString s = "SWITCH_TO_MENU "; |
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489 | |
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490 | s += quotedString(app_name); |
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491 | s += " " + QString(popMenu ? "TRUE" : "FALSE"); |
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492 | |
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493 | |
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494 | QPtrListIterator<LCDMenuItem> it(*menuItems); |
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495 | LCDMenuItem *curItem; |
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496 | |
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497 | while ((curItem = it.current()) != 0) |
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498 | { |
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499 | ++it; |
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500 | s += " " + quotedString(curItem->ItemName()); |
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501 | |
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502 | if (curItem->isChecked() == CHECKED) |
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503 | s += " CHECKED"; |
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504 | else if (curItem->isChecked() == CHECKED) |
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505 | s += " UNCHECKED"; |
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506 | else if (curItem->isChecked() == NOTCHECKABLE) |
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507 | s += " NOTCHECKABLE"; |
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508 | |
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509 | s += " " + QString(curItem->isSelected() ? "TRUE" : "FALSE"); |
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510 | s += " " + QString(curItem->Scroll() ? "TRUE" : "FALSE"); |
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511 | QString sIndent; |
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512 | sIndent.setNum(curItem->getIndent()); |
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513 | s += " " + sIndent; |
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514 | } |
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515 | |
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516 | sendToServer(s); |
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517 | } |
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518 | |
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519 | void LCD::switchToGeneric(QPtrList<LCDTextItem> *textItems) |
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520 | { |
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521 | if (!lcd_ready || !lcd_showgeneric) |
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522 | return; |
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523 | |
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524 | #if LCD_DEVICE_DEBUG > 1 |
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525 | VERBOSE(VB_ALL, "lcddevice: switchToGeneric "); |
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526 | #endif |
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527 | |
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528 | if (textItems->isEmpty()) |
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529 | return; |
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530 | |
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531 | QString s = "SWITCH_TO_GENERIC"; |
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532 | |
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533 | QPtrListIterator<LCDTextItem> it(*textItems); |
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534 | LCDTextItem *curItem; |
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535 | |
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536 | while ((curItem = it.current()) != 0) |
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537 | { |
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538 | ++it; |
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539 | QString sRow; |
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540 | sRow.setNum(curItem->getRow()); |
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541 | s += " " + sRow; |
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542 | |
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543 | if (curItem->getAlignment() == ALIGN_LEFT) |
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544 | s += " ALIGN_LEFT"; |
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545 | else if (curItem->getAlignment() == ALIGN_RIGHT) |
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546 | s += " ALIGN_RIGHT"; |
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547 | else if (curItem->getAlignment() == ALIGN_CENTERED) |
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548 | s += " ALIGN_CENTERED"; |
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549 | |
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550 | s += " " + quotedString(curItem->getText()); |
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551 | s += " " + quotedString(curItem->getScreen()); |
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552 | s += " " + QString(curItem->getScroll() ? "TRUE" : "FALSE"); |
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553 | } |
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554 | |
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555 | sendToServer(s); |
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556 | } |
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557 | |
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558 | void LCD::switchToVolume(QString app_name) |
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559 | { |
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560 | if (!lcd_ready || !lcd_showvolume) |
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561 | return; |
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562 | |
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563 | #if LCD_DEVICE_DEBUG > 1 |
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564 | VERBOSE(VB_ALL, "lcddevice: switchToVolume "); |
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565 | #endif |
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566 | |
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567 | sendToServer("SWITCH_TO_VOLUME " + quotedString(app_name)); |
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568 | } |
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569 | |
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570 | void LCD::switchToNothing() |
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571 | { |
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572 | if (!lcd_ready) |
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573 | return; |
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574 | |
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575 | #if LCD_DEVICE_DEBUG > 1 |
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576 | VERBOSE(VB_ALL, "lcddevice: switchToNothing"); |
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577 | #endif |
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578 | |
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579 | sendToServer("SWITCH_TO_NOTHING"); |
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580 | } |
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581 | |
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582 | void LCD::shutdown() |
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583 | { |
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584 | #if LCD_DEVICE_DEBUG > 1 |
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585 | VERBOSE(VB_ALL, "lcddevice: shutdown"); |
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586 | #endif |
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587 | |
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588 | socket->close(); |
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589 | |
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590 | lcd_ready = false; |
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591 | connected = false; |
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592 | } |
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593 | |
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594 | LCD::~LCD() |
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595 | { |
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596 | m_lcd = NULL; |
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597 | |
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598 | #if LCD_DEVICE_DEBUG > 0 |
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599 | VERBOSE(VB_ALL, "lcddevice: An LCD device is being snuffed out of " |
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600 | "existence (~LCD() was called)"); |
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601 | #endif |
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602 | |
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603 | if (socket) |
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604 | { |
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605 | delete socket; |
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606 | lcd_ready = false; |
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607 | } |
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608 | } |
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609 | |
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610 | // this does nothing |
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611 | void LCD::setLevels(int numbLevels, float *values) |
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612 | { |
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613 | numbLevels = numbLevels; |
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614 | values = values; |
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615 | |
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616 | #if LCD_DEVICE_DEBUG > 0 |
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617 | VERBOSE(VB_ALL, "lcddevice: setLevels"); |
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618 | #endif |
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619 | } |
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620 | |
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621 | QString LCD::quotedString(const QString &s) |
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622 | { |
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623 | QString sRes = s; |
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624 | sRes.replace(QRegExp("\""), QString("\"\"")); |
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625 | sRes = "\"" + sRes + "\""; |
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626 | |
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627 | return(sRes); |
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628 | } |
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