[processing] Use algorithm icon and friendly display names in the his…

…tory dialog

python/plugins/processing/gui/HistoryDialog.py

@@ -23,6 +23,7 @@
 
 import os
 import warnings
+import re
 
 from qgis.core import QgsApplication
 from qgis.gui import QgsGui, QgsHelp
@@ -114,12 +115,29 @@ def openHelp(self):
     def fillTree(self):
         self.tree.clear()
         entries = ProcessingLog.getLogEntries()
+        names = {}
+        icons = {}
         groupItem = QTreeWidgetItem()
         groupItem.setText(0, 'ALGORITHM')
         groupItem.setIcon(0, self.groupIcon)
         for entry in entries:
-            item = TreeLogEntryItem(entry, True)
-            item.setIcon(0, self.keyIcon)
+            icon = self.keyIcon
+            name = ''
+            match = re.search('processing.run\\("(.*?)"', entry.text)
+            if match.group:
+                algorithm_id = match.group(1)
+                if algorithm_id not in names:
+                    algorithm = QgsApplication.processingRegistry().algorithmById(algorithm_id)
+                    if algorithm:
+                        names[algorithm_id] = algorithm.displayName()
+                        icons[algorithm_id] = QgsApplication.processingRegistry().algorithmById(algorithm_id).icon()
+                    else:
+                        names[algorithm_id] = ''
+                        icons[algorithm_id] = self.keyIcon
+                name = names[algorithm_id]
+                icon = icons[algorithm_id]
+            item = TreeLogEntryItem(entry, True, name)
+            item.setIcon(0, icon)
             groupItem.insertChild(0, item)
         self.tree.addTopLevelItem(groupItem)
         groupItem.setExpanded(True)
@@ -161,8 +179,8 @@ def showPopupMenu(self, point):
 
 class TreeLogEntryItem(QTreeWidgetItem):
 
-    def __init__(self, entry, isAlg):
+    def __init__(self, entry, isAlg, algName):
         QTreeWidgetItem.__init__(self)
         self.entry = entry
         self.isAlg = isAlg
-        self.setText(0, '[' + entry.date + '] ' + entry.text.split(LOG_SEPARATOR)[0])
+        self.setText(0, '[' + entry.date + '] ' + algName + ' - ' + entry.text.split(LOG_SEPARATOR)[0])