add plugin weight to PluginDescriptor... so the plugin start order can be changed now
[vuplus_dvbapp] / lib / python / Components / PluginComponent.py
old mode 100644 (file)
new mode 100755 (executable)
index dd29628..a713c3b
-import os
+from os import path as os_path, listdir as os_listdir
+from traceback import print_exc
+from sys import stdout
 
-from Tools.Directories import *
+from Tools.Directories import fileExists
 from Tools.Import import my_import
 from Plugins.Plugin import PluginDescriptor
+import keymapparser
 
 class PluginComponent:
+       firstRun = True
+       restartRequired = False
+       
        def __init__(self):
                self.plugins = {}
                self.pluginList = [ ]
+               self.installedPluginList = [ ]
                self.setPluginPrefix("Plugins.")
-               
+               self.resetWarnings()
+
        def setPluginPrefix(self, prefix):
                self.prefix = prefix
-       
+
        def addPlugin(self, plugin):
-               self.pluginList.append(plugin)
-               for x in plugin.where:
-                       self.plugins.setdefault(x, []).append(plugin)
-                       if x == PluginDescriptor.WHERE_AUTOSTART:
-                               plugin(reason=0)
-       
+               if self.firstRun or plugin.needsRestart is False:
+                       self.pluginList.append(plugin)
+                       for x in plugin.where:
+                               self.plugins.setdefault(x, []).append(plugin)
+                               if x == PluginDescriptor.WHERE_AUTOSTART:
+                                       plugin(reason=0)
+               else:
+                       self.restartRequired = True
+                               
        def removePlugin(self, plugin):
                self.pluginList.remove(plugin)
                for x in plugin.where:
                        self.plugins[x].remove(plugin)
                        if x == PluginDescriptor.WHERE_AUTOSTART:
                                plugin(reason=1)
-       
+
        def readPluginList(self, directory):
                """enumerates plugins"""
-               
-               categories = os.listdir(directory)
-               
+
+               categories = os_listdir(directory)
+
                new_plugins = [ ]
-               
+
                for c in categories:
                        directory_category = directory + c
-                       if not os.path.isdir(directory_category):
+                       if not os_path.isdir(directory_category):
                                continue
                        open(directory_category + "/__init__.py", "a").close()
-                       for x in os.listdir(directory_category):
-                               path = directory_category + "/" + x
-                               if os.path.isdir(path):
-                                       if fileExists(path + "/plugin.pyc") or fileExists(path + "/plugin.py"):
-                                               plugin = my_import('.'.join(["Plugins", c, x, "plugin"]))
-
-                                               if not plugin.__dict__.has_key("Plugins"):
-                                                       print "Plugin %s doesn't have 'Plugin'-call." % (x)
-                                                       continue
+                       for pluginname in os_listdir(directory_category):
+                               path = directory_category + "/" + pluginname
+                               if os_path.isdir(path):
+                                       if fileExists(path + "/plugin.pyc") or fileExists(path + "/plugin.pyo") or fileExists(path + "/plugin.py"):
+                                               try:
+                                                       plugin = my_import('.'.join(["Plugins", c, pluginname, "plugin"]))
 
-                                               plugins = plugin.Plugins(path=path)
+                                                       if not plugin.__dict__.has_key("Plugins"):
+                                                               print "Plugin %s doesn't have 'Plugin'-call." % (pluginname)
+                                                               continue
+
+                                                       plugins = plugin.Plugins(path=path)
+                                               except Exception, exc:
+                                                       print "Plugin ", c + "/" + pluginname, "failed to load:", exc
+                                                       print_exc(file=stdout)
+                                                       print "skipping plugin."
+                                                       self.warnings.append( (c + "/" + pluginname, str(exc)) )
+                                                       continue
 
                                                # allow single entry not to be a list
-                                               if type(plugins) is not list:
+                                               if not isinstance(plugins, list):
                                                        plugins = [ plugins ]
 
                                                for p in plugins:
+                                                       p.path = path
                                                        p.updateIcon(path)
                                                        new_plugins.append(p)
-               
+
+                                               if fileExists(path + "/keymap.xml"):
+                                                       try:
+                                                               keymapparser.readKeymap(path + "/keymap.xml")
+                                                       except Exception, exc:
+                                                               print "keymap for plugin %s/%s failed to load: " % (c, pluginname), exc
+                                                               self.warnings.append( (c + "/" + pluginname, str(exc)) )
+
                # build a diff between the old list of plugins and the new one
                # internally, the "fnc" argument will be compared with __eq__
                plugins_added = [p for p in new_plugins if p not in self.pluginList]
-               plugins_removed = [p for p in self.pluginList if p not in new_plugins]
+               plugins_removed = [p for p in self.pluginList if not p.internal and p not in new_plugins]
                
+               #ignore already installed but reloaded plugins
+               for p in plugins_removed: 
+                       for pa in plugins_added:
+                               if pa.path == p.path and pa.where == p.where:
+                                       pa.needsRestart = False
+
                for p in plugins_removed:
                        self.removePlugin(p)
-               
+
                for p in plugins_added:
-                       self.addPlugin(p)
+                       if self.firstRun or p.needsRestart is False:
+                               self.addPlugin(p)
+                       else:
+                               for installed_plugin in self.installedPluginList:
+                                       if installed_plugin.path == p.path:
+                                               if installed_plugin.where == p.where:
+                                                       p.needsRestart = False
+                               self.addPlugin(p)
+                                               
+               if self.firstRun:
+                       self.firstRun = False
+                       self.installedPluginList = self.pluginList
 
        def getPlugins(self, where):
                """Get list of plugins in a specific category"""
-               
-               if type(where) is not list:
+
+               if not isinstance(where, list):
                        where = [ where ]
                res = [ ]
+
                for x in where:
-                       for p in self.plugins.get(x, [ ]):
-                               res.append(p)
+                       res.extend(self.plugins.get(x, [ ]))
+               res.sort(key=lambda x:x.weight)
                return res
-       
+
+       def getPluginsForMenu(self, menuid):
+               res = [ ]
+               for p in self.getPlugins(PluginDescriptor.WHERE_MENU):
+                       res += p(menuid)
+               res.sort(key=lambda x:x.weight)
+               return res
+
        def clearPluginList(self):
                self.pluginList = []
                self.plugins = {}
@@ -89,4 +140,15 @@ class PluginComponent:
                for p in self.pluginList[:]:
                        self.removePlugin(p)
 
+       def resetWarnings(self):
+               self.warnings = [ ]
+
+       def getNextWakeupTime(self):
+               wakeup = -1
+               for p in self.pluginList:
+                       current = p.getWakeupTime()
+                       if current > -1 and (wakeup > current or wakeup == -1):
+                               wakeup = current
+               return int(wakeup)
+
 plugins = PluginComponent()