[Processing] Add shortHelp for Scripts, Models and R

And enhance getParameterDescriptions

python/plugins/processing/algs/r/RAlgorithm.py

@@ -431,15 +431,34 @@ def help(self):
         else:
             return False, None
 
+    def shortHelp(self):
+        if self.descriptionFile is None:
+            return None
+        helpFile = unicode(self.descriptionFile) + '.help'
+        if os.path.exists(helpFile):
+            with open(helpFile) as f:
+                try:
+                    descriptions = json.load(f)
+                    if 'ALG_DESC' in descriptions:
+                        return self._formatHelp(unicode(descriptions['ALG_DESC']))
+                except:
+                    return None
+        return None
+
     def getParameterDescriptions(self):
         descs = {}
-        helpfile = unicode(self.descriptionFile) + '.help'
-        if os.path.exists(helpfile):
+        if self.descriptionFile is None:
+            return descs
+        helpFile = unicode(self.descriptionFile) + '.help'
+        if os.path.exists(helpFile):
             with open(helpFile) as f:
-                descriptions = json.load(f)
-                for param in self.parameters:
-                    if param.name in descriptions:
-                        descs[param.name] = unicode(descriptions[param.name])
+                try:
+                    descriptions = json.load(f)
+                    for param in self.parameters:
+                        if param.name in descriptions:
+                            descs[param.name] = unicode(descriptions[param.name])
+                except:
+                    return None
         return descs
 
     def checkBeforeOpeningParametersDialog(self):

python/plugins/processing/modeler/ModelerAlgorithm.py

@@ -533,6 +533,11 @@ def help(self):
         except:
             return False, None
 
+    def shortHelp(self):
+        if 'ALG_DESC' in self.helpContent:
+            return self._formatHelp(unicode(self.helpContent['ALG_DESC']))
+        return None
+
     def getParameterDescriptions(self):
         descs = {}
         descriptions = self.helpContent

python/plugins/processing/script/ScriptAlgorithm.py

@@ -331,13 +331,32 @@ def help(self):
         else:
             return False, None
 
+    def shortHelp(self):
+        if self.descriptionFile is None:
+            return None
+        helpFile = unicode(self.descriptionFile) + '.help'
+        if os.path.exists(helpFile):
+            with open(helpFile) as f:
+                try:
+                    descriptions = json.load(f)
+                    if 'ALG_DESC' in descriptions:
+                        return self._formatHelp(unicode(descriptions['ALG_DESC']))
+                except:
+                    return None
+        return None
+
     def getParameterDescriptions(self):
         descs = {}
-        helpfile = unicode(self.descriptionFile) + '.help'
-        if os.path.exists(helpfile):
+        if self.descriptionFile is None:
+            return descs
+        helpFile = unicode(self.descriptionFile) + '.help'
+        if os.path.exists(helpFile):
             with open(helpFile) as f:
-                descriptions = json.load(f)
-                for param in self.parameters:
-                    if param.name in descriptions:
-                        descs[param.name] = unicode(descriptions[param.name])
+                try:
+                    descriptions = json.load(f)
+                    for param in self.parameters:
+                        if param.name in descriptions:
+                            descs[param.name] = unicode(descriptions[param.name])
+                except:
+                    return None
         return descs