Merge pull request #3 from slicer69/linux

Audio volume and screen brightness added for Linux

3 files changed, 171 insertions, 11 deletions

diff --git a/libLumina/LuminaOS-Linux.cpp b/libLumina/LuminaOS-Linux.cpp
index 9d891461..60fb35fe 100644
--- a/libLumina/LuminaOS-Linux.cpp
+++ b/libLumina/LuminaOS-Linux.cpp
@@ -5,10 +5,14 @@
 //  See the LICENSE file for full details
 //===========================================
 #ifdef __linux__
+#include <QDebug>
 #include "LuminaOS.h"
 #include <unistd.h>
 #include <stdio.h> // Needed for BUFSIZ
 
+//can't read xbrightness settings - assume invalid until set
+static int screenbrightness = -1;
+
 // ==== ExternalDevicePaths() ====
 QStringList LOS::ExternalDevicePaths(){
     //Returns: QStringList[<type>::::<filesystem>::::<path>]
@@ -20,38 +24,85 @@ QStringList LOS::ExternalDevicePaths(){
 
 //Read screen brightness information
 int LOS::ScreenBrightness(){
-  //Returns: Screen Brightness as a percentage (0-100, with -1 for errors)
-  return -1;  //not implemented yet for Linux
+   //Returns: Screen Brightness as a percentage (0-100, with -1 for errors)
+  if(screenbrightness==-1){
+    if(QFile::exists("/tmp/.lumina-currentxbrightness")){
+      int val = LUtils::readFile("/tmp/.lumina-currentxbrightness").join("").simplified().toInt();
+      screenbrightness = val;
+    }
+  }
+  return screenbrightness;
+
 }
 
 //Set screen brightness
 void LOS::setScreenBrightness(int percent){
-  //not implemented yet for Linux
+  //ensure bounds
+  if(percent<0){percent=0;}
+  else if(percent>100){ percent=100; }
+  // float pf = percent/100.0; //convert to a decimel
+  //Run the command
+  QString cmd = "xbacklight -set %1";
+  // cmd = cmd.arg( QString::number( int(65535*pf) ) );
+  cmd = cmd.arg( QString::number( percent ) );
+  int ret = LUtils::runCmd(cmd);
+  //Save the result for later
+  if(ret!=0){ screenbrightness = -1; }
+  else{ screenbrightness = percent; }
+  LUtils::writeFile("/tmp/.lumina-currentxbrightness", QStringList() << QString::number(screenbrightness), true);
+
 }
 
 //Read the current volume
 int LOS::audioVolume(){ //Returns: audio volume as a percentage (0-100, with -1 for errors)
-  return -1; //Not implemented yet for Linux
+QString info = LUtils::getCmdOutput("amixer get Master").join("").simplified();;
+  int out = -1;
+  int start_position, end_position;
+  QString current_volume;
+  if(!info.isEmpty()){
+     start_position = info.indexOf("[");
+     start_position++;
+     end_position = info.indexOf("%");
+     current_volume = info.mid(start_position, end_position - start_position);
+     out = current_volume.toInt();
+  }
+  return out;
+
+
 }
 
 //Set the current volume
 void LOS::setAudioVolume(int percent){
-  //not implemented yet for Linux
+  if(percent<0){percent=0;}
+  else if(percent>100){percent=100;}
+  QString info = "amixer -c 0 sset Master,0 " + QString::number(percent) + "%";
+  if(!info.isEmpty()){
+    //Run Command
+    LUtils::runCmd(info);
+  }
+
 }
 
 //Change the current volume a set amount (+ or -)
 void LOS::changeAudioVolume(int percentdiff){
-  //not implemented yet for Linux	
+  int old_volume = audioVolume();
+  int new_volume = old_volume + percentdiff;
+  if (new_volume < 0)
+      new_volume = 0;
+  if (new_volume > 100)
+      new_volume = 100;
+  qDebug() << "Setting new volume to: " << new_volume;
+  setAudioVolume(new_volume);
 }
 
 //Check if a graphical audio mixer is installed
 bool LOS::hasMixerUtility(){
-  return false; //not implemented yet for Linux	
+  return QFile::exists("/usr/bin/pavucontrol");
 }
 
 //Launch the graphical audio mixer utility
 void LOS::startMixerUtility(){
-  //not implemented yet for Linux	
+  QProcess::startDetached("/usr/bin/pavucontrol");
 }
 
 //System Shutdown
@@ -66,17 +117,38 @@ void LOS::systemRestart(){ //start reboot sequence
 
 //Battery Availability
 bool LOS::hasBattery(){
-  return false; //not implemented yet for Linux
+  QString my_status = LUtils::getCmdOutput("acpi -b").join("");
+  bool no_battery = my_status.contains("No support");
+  if (no_battery) return false;
+  return true; 
 }
 
 //Battery Charge Level
 int LOS::batteryCharge(){ //Returns: percent charge (0-100), anything outside that range is counted as an error
-  return -1;  //not implemented yet for Linux
+  QString my_status = LUtils::getCmdOutput("acpi -b").join("");
+  int my_start = my_status.indexOf("%");
+  // get the number right before the % sign
+  int my_end = my_start;
+  my_start--;
+  while ( (my_status[my_start] != ' ') && (my_start > 0) )
+      my_start--;
+  my_start++;
+  int my_charge = my_status.mid(my_start, my_end - my_start).toInt();
+  if ( (my_charge < 0) || (my_charge > 100) ) return -1;
+  return my_charge;
 }
 
 //Battery Charging State
+// Many possible values are returned if the laptop is plugged in
+// these include "Unknown, Full and No support.
+// However, it seems just one status is returned when running
+// on battery and that is "Discharging". So if the value we get
+// is NOT Discharging then we assume the batter yis charging.
 bool LOS::batteryIsCharging(){
-  return false; //not implemented yet for Linux
+  QString my_status = LUtils::getCmdOutput("acpi -b").join("");
+  bool discharging = my_status.contains("Discharging");
+  if (discharging) return false;
+  return true;
 }
 
 //Battery Time Remaining
diff --git a/libLumina/LuminaOS-template.cpp b/libLumina/LuminaOS-template.cpp
new file mode 100644
index 00000000..be70e1a5
--- /dev/null
+++ b/libLumina/LuminaOS-template.cpp
@@ -0,0 +1,87 @@
+//===========================================
+//  Lumina-DE source code
+//  Copyright (c) 2014, Ken Moore
+//  Available under the 3-clause BSD license
+//  See the LICENSE file for full details
+//===========================================
+#ifdef __OSNAME__
+#include "LuminaOS.h"
+#include <unistd.h>
+#include <stdio.h> // Needed for BUFSIZ
+
+// ==== ExternalDevicePaths() ====
+QStringList LOS::ExternalDevicePaths(){
+    //Returns: QStringList[<type>::::<filesystem>::::<path>]
+      //Note: <type> = [USB, HDRIVE, DVD, SDCARD, UNKNOWN]
+	
+  //Not implemented yet for Linux
+  return QStringList();
+}
+
+//Read screen brightness information
+int LOS::ScreenBrightness(){
+  //Returns: Screen Brightness as a percentage (0-100, with -1 for errors)
+  return -1;  //not implemented yet for Linux
+}
+
+//Set screen brightness
+void LOS::setScreenBrightness(int percent){
+  //not implemented yet for Linux
+}
+
+//Read the current volume
+int LOS::audioVolume(){ //Returns: audio volume as a percentage (0-100, with -1 for errors)
+  return -1; //Not implemented yet for Linux
+}
+
+//Set the current volume
+void LOS::setAudioVolume(int percent){
+  //not implemented yet for Linux
+}
+
+//Change the current volume a set amount (+ or -)
+void LOS::changeAudioVolume(int percentdiff){
+  //not implemented yet for Linux	
+}
+
+//Check if a graphical audio mixer is installed
+bool LOS::hasMixerUtility(){
+  return false; //not implemented yet for Linux	
+}
+
+//Launch the graphical audio mixer utility
+void LOS::startMixerUtility(){
+  //not implemented yet for Linux	
+}
+
+//System Shutdown
+void LOS::systemShutdown(){ //start poweroff sequence
+  QProcess::startDetached("shutdown -h now");
+}
+
+//System Restart
+void LOS::systemRestart(){ //start reboot sequence
+  QProcess::startDetached("shutdown -r now");
+}
+
+//Battery Availability
+bool LOS::hasBattery(){
+  return false; //not implemented yet for Linux
+}
+
+//Battery Charge Level
+int LOS::batteryCharge(){ //Returns: percent charge (0-100), anything outside that range is counted as an error
+  return -1;  //not implemented yet for Linux
+}
+
+//Battery Charging State
+bool LOS::batteryIsCharging(){
+  return false; //not implemented yet for Linux
+}
+
+//Battery Time Remaining
+int LOS::batterySecondsLeft(){ //Returns: estimated number of seconds remaining
+  return 0; //not implemented yet for Linux
+}
+
+#endif
diff --git a/libLumina/libLumina.pro b/libLumina/libLumina.pro
index fcf84980..9de16637 100644
--- a/libLumina/libLumina.pro
+++ b/libLumina/libLumina.pro
@@ -20,6 +20,7 @@ SOURCES	+= LuminaXDG.cpp \
 	LuminaX11.cpp \ 
 	LuminaOS-FreeBSD.cpp \
 	LuminaOS-Linux.cpp
+#       new OS support can be added here
 
 INCLUDEPATH += /usr/local/include