[processing] Use c++ recent algorithm log, remove python log

Indirectly fixes #19218

Author: nyalldawson

python/plugins/processing/algs/qgis/ui/FieldsCalculatorDialog.py

@@ -42,7 +42,7 @@
                        QgsProject,
                        QgsMessageLog,
                        QgsProcessingOutputLayerDefinition)
-from qgis.gui import QgsEncodingFileDialog
+from qgis.gui import QgsEncodingFileDialog, QgsGui
 from qgis.utils import OverrideCursor
 
 from processing.core.ProcessingConfig import ProcessingConfig
@@ -240,6 +240,7 @@ def accept(self):
 
                 context = dataobjects.createContext()
                 ProcessingLog.addToLog(self.alg.asPythonCommand(parameters, context))
+                QgsGui.instance().processingRecentAlgorithmLog().push(self.alg.id())
 
                 self.executed, results = execute(self.alg, parameters, context, self.feedback)
                 self.setPercentage(0)

python/plugins/processing/core/ProcessingConfig.py

@@ -56,7 +56,6 @@ class ProcessingConfig:
     USE_FILENAME_AS_LAYER_NAME = 'USE_FILENAME_AS_LAYER_NAME'
     KEEP_DIALOG_OPEN = 'KEEP_DIALOG_OPEN'
     SHOW_DEBUG_IN_DIALOG = 'SHOW_DEBUG_IN_DIALOG'
-    RECENT_ALGORITHMS = 'RECENT_ALGORITHMS'
     PRE_EXECUTION_SCRIPT = 'PRE_EXECUTION_SCRIPT'
     POST_EXECUTION_SCRIPT = 'POST_EXECUTION_SCRIPT'
     SHOW_CRS_DEF = 'SHOW_CRS_DEF'
@@ -136,10 +135,6 @@ def initialize():
             ProcessingConfig.POST_EXECUTION_SCRIPT,
             ProcessingConfig.tr('Post-execution script'), '',
             valuetype=Setting.FILE))
-        ProcessingConfig.addSetting(Setting(
-            ProcessingConfig.tr('General'),
-            ProcessingConfig.RECENT_ALGORITHMS,
-            ProcessingConfig.tr('Recent algorithms'), '', hidden=True))
         ProcessingConfig.addSetting(Setting(
             ProcessingConfig.tr('General'),
             ProcessingConfig.MODELS_SCRIPTS_REPO,

python/plugins/processing/core/ProcessingLog.py

@@ -38,7 +38,6 @@
 class ProcessingLog:
 
     DATE_FORMAT = "%Y-%m-%d %H:%M:%S"
-    recentAlgs = []
 
     @staticmethod
     def logFilename():
@@ -63,14 +62,6 @@ def addToLog(msg):
             with codecs.open(ProcessingLog.logFilename(), 'a',
                              encoding='utf-8') as logfile:
                 logfile.write(line)
-            algname = msg[len('processing.run("'):]
-            algname = algname[:algname.index('"')]
-            if algname not in ProcessingLog.recentAlgs:
-                ProcessingLog.recentAlgs.append(algname)
-                recentAlgsString = ';'.join(ProcessingLog.recentAlgs[-6:])
-                ProcessingConfig.setSettingValue(
-                    ProcessingConfig.RECENT_ALGORITHMS,
-                    recentAlgsString)
         except:
             pass
 
@@ -95,16 +86,6 @@ def getLogEntries():
 
         return entries
 
-    @staticmethod
-    def getRecentAlgorithms():
-        recentAlgsSetting = ProcessingConfig.getSetting(
-            ProcessingConfig.RECENT_ALGORITHMS)
-        try:
-            ProcessingLog.recentAlgs = recentAlgsSetting.split(';')
-        except:
-            pass
-        return ProcessingLog.recentAlgs
-
     @staticmethod
     def clearLog():
         os.unlink(ProcessingLog.logFilename())

python/plugins/processing/gui/AlgorithmDialog.py

@@ -44,7 +44,8 @@
                        QgsProcessingParameterFeatureSink,
                        QgsProcessingParameterRasterDestination,
                        QgsProcessingAlgorithm)
-from qgis.gui import (QgsMessageBar,
+from qgis.gui import (QgsGui,
+                      QgsMessageBar,
                       QgsProcessingAlgorithmDialogBase)
 from qgis.utils import iface
 
@@ -188,6 +189,7 @@ def accept(self):
                 command = self.algorithm().asPythonCommand(parameters, context)
                 if command:
                     ProcessingLog.addToLog(command)
+                QgsGui.instance().processingRecentAlgorithmLog().push(self.algorithm().id())
                 self.cancelButton().setEnabled(self.algorithm().flags() & QgsProcessingAlgorithm.FlagCanCancel)
 
                 def on_complete(ok, results):

python/plugins/processing/gui/ProcessingToolbox.py

@@ -35,7 +35,8 @@
 from qgis.utils import iface
 from qgis.core import (QgsApplication,
                        QgsProcessingAlgorithm)
-from qgis.gui import QgsDockWidget
+from qgis.gui import (QgsGui,
+                      QgsDockWidget)
 
 from processing.gui.Postprocessing import handleAlgorithmResults
 from processing.core.ProcessingLog import ProcessingLog
@@ -107,6 +108,7 @@ def openSettings(url):
 
         QgsApplication.processingRegistry().providerRemoved.connect(self.removeProvider)
         QgsApplication.processingRegistry().providerAdded.connect(self.addProvider)
+        QgsGui.instance().processingRecentAlgorithmLog().changed.connect(self.addRecentAlgorithms)
         settingsWatcher.settingsChanged.connect(self.fillTree)
 
     def showDisabled(self):
@@ -349,11 +351,6 @@ def executeAlgorithm(self):
                     except:
                         pass
                     canvas.setMapTool(prevMapTool)
-                if dlg.wasExecuted():
-                    showRecent = ProcessingConfig.getSetting(
-                        ProcessingConfig.SHOW_RECENT_ALGORITHMS)
-                    if showRecent:
-                        self.addRecentAlgorithms(True)
             else:
                 feedback = MessageBarProgress()
                 context = dataobjects.createContext(feedback)
@@ -366,11 +363,11 @@ def fillTree(self):
         self.fillTreeUsingProviders()
         self.addRecentAlgorithms(False)
 
-    def addRecentAlgorithms(self, updating):
+    def addRecentAlgorithms(self, updating=True):
         showRecent = ProcessingConfig.getSetting(
             ProcessingConfig.SHOW_RECENT_ALGORITHMS)
         if showRecent:
-            recent = ProcessingLog.getRecentAlgorithms()
+            recent = QgsGui.instance().processingRecentAlgorithmLog().recentAlgorithmIds()
             if len(recent) != 0:
                 found = False
                 if updating:
@@ -382,8 +379,8 @@ def addRecentAlgorithms(self, updating):
 
                 recentItem = QTreeWidgetItem()
                 recentItem.setText(0, self.tr('Recently used'))
-                for algname in recent:
-                    alg = QgsApplication.processingRegistry().createAlgorithmById(algname)
+                for algorithm_id in recent:
+                    alg = QgsApplication.processingRegistry().createAlgorithmById(algorithm_id)
                     if alg is not None:
                         algItem = TreeAlgorithmItem(alg)
                         recentItem.addChild(algItem)