[processing] rst files are now the default for help files

Author: volaya

python/plugins/processing/core/GeoAlgorithm.py

@@ -25,13 +25,15 @@
 
 __revision__ = '$Format:%H$'
 
+import inspect
 import os.path
 import traceback
 import copy
 from PyQt4 import QtGui
 from PyQt4.QtCore import *
 from qgis.core import *
 
+from processing.gui.Help2Html import getHtmlFromRstFile
 from processing.core.ProcessingLog import ProcessingLog
 from processing.core.ProcessingConfig import ProcessingConfig
 from processing.core.GeoAlgorithmExecutionException import \
@@ -112,11 +114,25 @@ def help(self):
         """Returns the help with the description of this algorithm.
         It returns a tuple boolean, string. IF the boolean value is true, it means that
         the string contains the actual description. If false, it is an url or path to a file
-        where the description is stored
+        where the description is stored.
 
         Returns None if there is no help file available.
+        
+        The default implementation looks for an rst file in a help folder under the folder 
+        where the algorithm is located.
+        The name of the file is the name console name of the algorithm, without the namespace part
         """
-        return False, None
+        name = self.commandLineName().split(':')[1].lower()
+        filename = os.path.join(os.path.dirname(inspect.getfile(self.__class__)), 'help', name + '.rst')   
+        print filename     
+        try:
+            html = getHtmlFromRstFile(filename)
+            print html
+            return True, html
+        except:
+            print "error"
+            return False, None
+        
 
     def processAlgorithm(self):
         """Here goes the algorithm itself.

python/plugins/processing/gui/Help2Html.py

@@ -45,7 +45,7 @@
 
 def getHtmlFromRstFile(rst):
     if not os.path.exists(rst):
-        return ''
+        return None
     with open(rst) as f:
         lines = f.readlines()
     s = "".join(lines)