git.zerfleddert.de Git - ms2-fixes/blob - MS2Debounce/src/de/rmdir/ms2debounce/DebounceModuleHelper.java

   1 package de.rmdir.ms2debounce;
   2
   3 import java.io.InputStream;
   4 import java.io.OutputStream;
   5 import java.io.File;
   6 import java.io.FileReader;
   7 import java.io.BufferedReader;
   8
   9 import android.content.Context;
  10 import android.content.SharedPreferences;
  11
  12 public class DebounceModuleHelper
  13 {
  14         private Context ctx;
  15         public static final String PREFS_NAME = "DebounceCfg";
  16
  17         public DebounceModuleHelper(Context context) {
  18                 ctx = context;
  19         }
  20
  21         public void loadModule() {
  22                 loadModule(getSavedDelay());
  23         }
  24
  25         public synchronized void loadModule(int delay) {
  26                 File debounce_ko = new File(ctx.getFilesDir() + "/debounce.ko");
  27
  28                 extractModule();
  29
  30                 SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
  31                 SharedPreferences.Editor editor = settings.edit();
  32                 if (is_safe_to_load()) {
  33                         editor.putBoolean("safe_to_load", false);
  34                         editor.commit();
  35                 }
  36
  37                 try {
  38                         Process insmod = Runtime.getRuntime().exec(new String[]{"su","-c","/system/bin/insmod " + debounce_ko + " debounce_delay=" + delay});
  39                         insmod.waitFor();
  40                 } catch (Exception e) {
  41                         return;
  42                 }
  43
  44                 if (!isLoaded()) {
  45                         return;
  46                 }
  47
  48                 if (getDelay() <= 0) {
  49                         return;
  50                 }
  51
  52                 /* Module was obviously loaded, so it is safe to load on boot */
  53                 editor.putBoolean("safe_to_load", true);
  54                 editor.commit();
  55         }
  56
  57         public synchronized void unloadModule() {
  58                 try {
  59                         Process rmmod = Runtime.getRuntime().exec(new String[]{"su","-c","/system/bin/rmmod debounce"});
  60                         rmmod.waitFor();
  61                 } catch (Exception e) {}
  62         }
  63
  64         public synchronized boolean isLoaded() {
  65                 boolean loaded = false;
  66                 try {
  67                         String read;
  68
  69                         FileReader modules = new FileReader("/proc/modules");
  70                         BufferedReader modules_buf = new BufferedReader(modules);
  71
  72                         while((read = modules_buf.readLine()) != null) {
  73                                 if (read.regionMatches(0, "debounce", 0, 8)) {
  74                                         loaded = true;
  75                                 }
  76                         }
  77
  78                 } catch (Exception e) {
  79                         loaded = false;
  80                 }
  81
  82                 return loaded;
  83         }
  84
  85         public synchronized int getDelay() {
  86                 int debounce_delay = -1;
  87
  88                 try {
  89                         String read;
  90
  91                         FileReader delay = new FileReader("/sys/module/debounce/parameters/debounce_delay");
  92                         BufferedReader delay_buf = new BufferedReader(delay);
  93
  94                         read = delay_buf.readLine();
  95                         if (read != null) {
  96                                 debounce_delay = Integer.parseInt(read.trim());
  97                         }
  98                 } catch (Exception e) {}
  99
 100                 return debounce_delay;
 101         }
 102
 103         public synchronized void setDelay(int delay) {
 104                 if (isLoaded()) {
 105                         if (getDelay() == delay) {
 106                                 return;
 107                         }
 108
 109                         unloadModule();
 110                 }
 111
 112                 loadModule(delay);
 113         }
 114
 115         public synchronized int getSavedDelay() {
 116                 SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
 117
 118                 return settings.getInt("debounce_delay", 10);
 119         }
 120
 121         public synchronized void setSavedDelay(int delay) {
 122                 SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
 123                 SharedPreferences.Editor editor = settings.edit();
 124
 125                 editor.putInt("debounce_delay", delay);
 126                 editor.commit();
 127         }
 128
 129         public synchronized boolean is_safe_to_load() {
 130                 SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
 131                 boolean safe_to_load = settings.getBoolean("safe_to_load", false);
 132
 133                 return safe_to_load;
 134         }
 135
 136         private synchronized void extractModule() {
 137                 File debounce_ko = new File(ctx.getFilesDir() + "/debounce.ko");
 138
 139                 if (debounce_ko.exists()) {
 140                         return;
 141                 }
 142
 143                 try {
 144                         InputStream apk = ctx.getAssets().open("debounce.ko");
 145                         OutputStream mod = ctx.openFileOutput("debounce.ko.tmp", 0);
 146
 147                         //I assume a page is 4k...
 148                         byte buf[] = new byte[4096];
 149                         int bytes;
 150
 151                         while((bytes = apk.read(buf)) != -1) {
 152                                 mod.write(buf, 0, bytes);
 153                         }
 154
 155                         apk.close();
 156                         mod.close();
 157
 158                         File tmpfile = new File(debounce_ko + ".tmp");
 159                         tmpfile.renameTo(debounce_ko);
 160                 } catch (Exception e) {}
 161         }
 162 }