Remember overview scroll position

compcount.lua

@@ -23,6 +23,8 @@ local fallbackIcon = false
 local backButton = false
 local scrollUpButton = false
 local scrollDownButton = false
+local overviewScrollCurrentRow = 0
+local overviewScrollTargetRow = 0
 local drawOverview
 
 local function ensureChainsLoaded()
@@ -462,6 +464,18 @@ local function runScrollableGrid(options)
     local scrollbarTrackPixelY = cellToPixelY(scrollbarTrackY)
     local scrollbarTrackPixelHeight = math.max(0, scrollbarTrackHeight * 3)
 
+    if options.getInitialScrollState then
+        local initialCurrentRow, initialTargetRow = options.getInitialScrollState()
+        currentScrollRow = tonumber(initialCurrentRow) or 0
+        targetScrollRow = tonumber(initialTargetRow) or currentScrollRow
+    end
+
+    local function persistScrollState()
+        if options.setScrollState then
+            options.setScrollState(currentScrollRow, targetScrollRow)
+        end
+    end
+
     local function clampScrollRow(row)
         return math.max(0, math.min(maxScrollRow, row))
     end
@@ -493,6 +507,7 @@ local function runScrollableGrid(options)
 
         if clampedRow ~= targetScrollRow then
             targetScrollRow = clampedRow
+            persistScrollState()
             scheduleAnimation()
         end
     end
@@ -506,6 +521,7 @@ local function runScrollableGrid(options)
         maxScrollRow = math.max(0, totalRows - rowsPerView)
         currentScrollRow = clampScrollRow(currentScrollRow)
         targetScrollRow = clampScrollRow(targetScrollRow)
+        persistScrollState()
 
         local firstVisibleRow = math.floor(currentScrollRow)
         local rowOffsetPixels = -math.floor((currentScrollRow - firstVisibleRow) * rowStepPixels + 0.5)
@@ -591,6 +607,7 @@ local function runScrollableGrid(options)
                 end
             end
 
+            persistScrollState()
             renderGrid()
         elseif event == "monitor_touch" and p1 == monName then
             if options.handleChromeTouch and options.handleChromeTouch(x, y) then
@@ -681,6 +698,13 @@ drawOverview = function()
 
     runScrollableGrid({
         refreshSeconds = 30,
+        getInitialScrollState = function()
+            return overviewScrollCurrentRow, overviewScrollTargetRow
+        end,
+        setScrollState = function(currentRow, targetRow)
+            overviewScrollCurrentRow = currentRow
+            overviewScrollTargetRow = targetRow
+        end,
         getEntriesAndCounts = function()
             local itemCounts = getMeItemCounts(items)
             local sortedItemIds = {}