From e58b66fb8197622b674c2c46b6c25dd52ba6befb Mon Sep 17 00:00:00 2001
From: Tim Thompson <me@timthompson.com>
Date: Sat, 10 Feb 2024 09:46:49 -0800
Subject: [PATCH] add Filter

---
 kit/patch.go          | 27 +++++++++++++++++++++++++++
 kit/scheduler.go      | 29 ++++++++++++++++++++++++-----
 python/palette_gui.py |  6 ++++++
 3 files changed, 57 insertions(+), 5 deletions(-)

diff --git a/kit/patch.go b/kit/patch.go
index 2bfd3fb5..b2de470b 100644
--- a/kit/patch.go
+++ b/kit/patch.go
@@ -301,6 +301,10 @@ func (patch *Patch) Api(api string, apiargs map[string]string) (string, error) {
 		patch.loopFade()
 		return "", nil
 
+	case "filter":
+		patch.loopFilter()
+		return "", nil
+
 	default:
 		// ignore errors on these for the moment
 		if strings.HasPrefix(api, "loop_") || strings.HasPrefix(api, "midi_") {
@@ -509,6 +513,29 @@ func (patch *Patch) loopFade() {
 	TheScheduler.pendingMutex.Unlock()
 }
 
+func (patch *Patch) loopFilter() {
+	tag := patch.name
+
+	// TheCursorManager.DeleteActiveCursorsForTag(tag)
+	// LogInfo("loopClear before DeleteEvents")
+	TheScheduler.FilterEventsWithTag(tag)
+	// LogInfo("loopClear after DeleteEvents")
+
+	TheScheduler.pendingMutex.Lock()
+	clearPending := false
+	for _, se := range TheScheduler.pendingScheduled {
+		if se.Tag == tag {
+			LogInfo("HEY!, saw pendingSchedule with tag prefix!", "prefix", tag, "se", se)
+			clearPending = true
+		}
+	}
+	if clearPending {
+		// LogInfo("loopClear is clearing pendingScheduled")
+		TheScheduler.pendingScheduled = nil
+	}
+	TheScheduler.pendingMutex.Unlock()
+}
+
 func (patch *Patch) loopClear() {
 	tag := patch.name
 
diff --git a/kit/scheduler.go b/kit/scheduler.go
index 2dda8c8f..6a19e5b5 100644
--- a/kit/scheduler.go
+++ b/kit/scheduler.go
@@ -3,6 +3,7 @@ package kit
 import (
 	"container/list"
 	"fmt"
+	"math/rand"
 	"runtime/debug"
 	"sync"
 	"time"
@@ -198,6 +199,8 @@ func (sched *Scheduler) DeleteCursorEventsWhoseGidIs(gid int) {
 	}
 }
 
+// XXX - Fade, Filter, and Delete should be combined into one function
+
 func (sched *Scheduler) FadeEventsWithTag(tag string) {
 
 	sched.mutex.Lock()
@@ -221,6 +224,27 @@ func (sched *Scheduler) FadeEventsWithTag(tag string) {
 	}
 }
 
+func (sched *Scheduler) FilterEventsWithTag(tag string) {
+
+	sched.mutex.Lock()
+	defer sched.mutex.Unlock()
+
+	rnd := rand.New(rand.NewSource(1))
+	var nexti *list.Element
+	for i := sched.schedList.Front(); i != nil; i = nexti {
+		nexti = i.Next()
+		se := i.Value.(*SchedElement)
+		if se.Tag != tag {
+			continue
+		}
+		ce, isce := se.Value.(CursorEvent)
+		if isce && ce.Ddu == "up" && rnd.Float32() < 0.5 {
+			TheCursorManager.DeleteActiveCursor(ce.Gid)
+		}
+		sched.schedList.Remove(i)
+	}
+}
+
 func (sched *Scheduler) DeleteEventsWithTag(tag string) {
 
 	sched.mutex.Lock()
@@ -232,16 +256,11 @@ func (sched *Scheduler) DeleteEventsWithTag(tag string) {
 		if se.Tag != tag {
 			continue
 		}
-		// LogInfo("DeleteEventsWithTag Removing schedList entry", "tag", tag, "i", i, "se", se)
 		ce, isce := se.Value.(CursorEvent)
-		// LogInfo("SAW CURSOREVENT", "v", v, "ddu", v.Ddu)
 		if isce && ce.Ddu == "up" {
-			// LogInfo("UP CURSOREVENT should be removing gid", "gid", v.Gid)
 			TheCursorManager.DeleteActiveCursor(ce.Gid)
-			// LogInfo("UP CURSOREVENT after removing gid", "gid", v.Gid)
 		}
 		sched.schedList.Remove(i)
-		// keep going, there will be lots of them
 	}
 
 	sched.mutex.Unlock()
diff --git a/python/palette_gui.py b/python/palette_gui.py
index 88cbb01e..2911dfff 100644
--- a/python/palette_gui.py
+++ b/python/palette_gui.py
@@ -396,6 +396,11 @@ def fadeNotes(self):
             palette.palette_patch_api(patch.name(), "fade", "")
         self.patchChooser.refreshPatches()
 
+    def filterNotes(self):
+        for patch in self.PatchList():
+            palette.palette_patch_api(patch.name(), "filter", "")
+        self.patchChooser.refreshPatches()
+
     def setNextMode(self,mode):
         self.nextMode = mode
 
@@ -2203,6 +2208,7 @@ def __init__(self, parent, controller):
         self.makePerformButton("SOFT_RESET", self.controller.softReset)
         self.makePerformButton("CLEAR_LOOP", self.controller.clearNotes)
         self.makePerformButton("FADE_LOOP", self.controller.fadeNotes)
+        self.makePerformButton("FILTER_LOOP", self.controller.filterNotes)
         self.makePerformButton("HELP_ ", self.controller.startHelp)
         # self.makePerformButton("Looping_OFF", self.controller.loopingOff)
         # if self.controller.guidefaultlevel > 0: