state persistance consolidation

FlexLove.lua

@@ -430,53 +430,13 @@ function flexlove.endFrame()
     end
   end
 
-  -- Save state back for all elements created this frame (with diffing optimization)
+  -- Save state for all elements created this frame
+  -- State is collected from element and all sub-modules via element:saveState()
+  -- This is the ONLY place state is saved in immediate mode
   for _, element in ipairs(flexlove._currentFrameElements) do
     if element.id and element.id ~= "" then
-      -- Build state update object
-      local stateUpdate = {}
-
-      -- Get event handler state
-      if element._eventHandler then
-        local eventState = element._eventHandler:getState()
-        for k, v in pairs(eventState) do
-          stateUpdate[k] = v
-        end
-      end
-
-      stateUpdate._focused = element._focused
-      stateUpdate._cursorPosition = element._cursorPosition
-      stateUpdate._selectionStart = element._selectionStart
-      stateUpdate._selectionEnd = element._selectionEnd
-      stateUpdate._textBuffer = element._textBuffer
-      stateUpdate._scrollX = element._scrollX
-      stateUpdate._scrollY = element._scrollY
-      stateUpdate._scrollbarDragging = element._scrollbarDragging
-      stateUpdate._hoveredScrollbar = element._hoveredScrollbar
-      stateUpdate._scrollbarDragOffset = element._scrollbarDragOffset
-      -- Cursor blink state is stored in TextEditor instance
-      if element._textEditor then
-        stateUpdate._cursorBlinkTimer = element._textEditor._cursorBlinkTimer
-        stateUpdate._cursorVisible = element._textEditor._cursorVisible
-        stateUpdate._cursorBlinkPaused = element._textEditor._cursorBlinkPaused
-        stateUpdate._cursorBlinkPauseTimer = element._textEditor._cursorBlinkPauseTimer
-      end
-      
-      -- Track blur-related properties for cache invalidation
-      if element.backdropBlur or element.contentBlur then
-        stateUpdate._blurX = element.x
-        stateUpdate._blurY = element.y
-        stateUpdate._blurWidth = element._borderBoxWidth or (element.width + element.padding.left + element.padding.right)
-        stateUpdate._blurHeight = element._borderBoxHeight or (element.height + element.padding.top + element.padding.bottom)
-        if element.backdropBlur then
-          stateUpdate._backdropBlurIntensity = element.backdropBlur.intensity
-          stateUpdate._backdropBlurQuality = element.backdropBlur.quality
-        end
-        if element.contentBlur then
-          stateUpdate._contentBlurIntensity = element.contentBlur.intensity
-          stateUpdate._contentBlurQuality = element.contentBlur.quality
-        end
-      end
+      -- Collect state from element and all sub-modules
+      local stateUpdate = element:saveState()
       
       -- Use optimized update that only changes modified values
       -- Returns true if state was changed (meaning blur cache needs invalidation)
@@ -757,22 +717,8 @@ function flexlove.update(dt)
 
   flexlove._activeEventElement = nil
 
-  -- In immediate mode, save state after update so that cursor blink timer changes persist
-  if flexlove._immediateMode and flexlove._currentFrameElements then
-    for _, element in ipairs(flexlove._currentFrameElements) do
-      if element.id and element.id ~= "" and element.editable and element._focused and element._textEditor then
-        local state = StateManager.getState(element.id, {})
-
-        -- Save cursor blink state (updated during element:update())
-        state._cursorBlinkTimer = element._textEditor._cursorBlinkTimer
-        state._cursorVisible = element._textEditor._cursorVisible
-        state._cursorBlinkPaused = element._textEditor._cursorBlinkPaused
-        state._cursorBlinkPauseTimer = element._textEditor._cursorBlinkPauseTimer
-
-        StateManager.setState(element.id, state)
-      end
-    end
-  end
+  -- Note: State saving happens in endFrame() after element:update() is called
+  -- This ensures all state changes (including cursor blink) are captured once per frame
 end
 
 --- Internal GC management function (called from update)
@@ -1065,69 +1011,35 @@ function flexlove.new(props)
 
   -- Inject scroll state into props BEFORE creating element
   -- This ensures scroll position is set before layoutChildren/detectOverflow is called
+  -- ScrollManager state uses _scrollX/_scrollY with underscore prefix
+  if state.scrollManager then
+    props._scrollX = state.scrollManager._scrollX or 0
+    props._scrollY = state.scrollManager._scrollY or 0
+  else
+    -- Fallback to old state structure for backward compatibility
     props._scrollX = state._scrollX or 0
     props._scrollY = state._scrollY or 0
+  end
 
   local element = Element.new(props)
 
-  -- Bind persistent state to element (ImmediateModeState)
-  -- Restore event handler state
-  if element._eventHandler then
-    element._eventHandler:setState(state)
-  end
-  element._focused = state._focused
-  element._focused = state._focused
-  element._cursorPosition = state._cursorPosition
-  element._selectionStart = state._selectionStart
-  element._selectionEnd = state._selectionEnd
-  element._textBuffer = state._textBuffer or element.text or ""
-  -- Note: scroll position already set from props during Element.new()
-  -- element._scrollX and element._scrollY already restored
-  element._scrollbarDragging = state._scrollbarDragging ~= nil and state._scrollbarDragging or false
-  element._hoveredScrollbar = state._hoveredScrollbar
-  element._scrollbarDragOffset = state._scrollbarDragOffset ~= nil and state._scrollbarDragOffset or 0
-
-  -- Sync scrollbar drag state to ScrollManager if it exists
-  if element._scrollManager then
-    element._scrollManager._scrollbarDragging = element._scrollbarDragging
-    element._scrollManager._hoveredScrollbar = element._hoveredScrollbar
-    element._scrollManager._scrollbarDragOffset = element._scrollbarDragOffset
-  end
-
-  -- Restore cursor blink state (will be restored by TextEditor:restoreState() if element has _textEditor)
-  -- These are kept for backward compatibility but are no longer used directly on element
-  element._cursorBlinkTimer = state._cursorBlinkTimer or 0
-  element._cursorVisible = state._cursorVisible
-  element._cursorBlinkPaused = state._cursorBlinkPaused or false
-  element._cursorBlinkPauseTimer = state._cursorBlinkPauseTimer or 0
+  -- Restore all state from StateManager (delegates to sub-modules)
+  element:restoreState(state)
 
   -- Bind element to StateManager for interactive states
-  -- Use the same ID for StateManager so state persists across frames
   element._stateId = props.id
 
-  -- Load interactive state from StateManager (already loaded in 'state' variable above)
-  element._scrollbarHoveredVertical = state.scrollbarHoveredVertical
-  element._scrollbarHoveredHorizontal = state.scrollbarHoveredHorizontal
-  element._scrollbarDragging = state.scrollbarDragging
-  element._hoveredScrollbar = state.hoveredScrollbar
-  element._scrollbarDragOffset = state.scrollbarDragOffset or 0
-
-  -- Sync interactive scroll state to ScrollManager if it exists
-  if element._scrollManager then
-    element._scrollManager._scrollbarHoveredVertical = element._scrollbarHoveredVertical or false
-    element._scrollManager._scrollbarHoveredHorizontal = element._scrollbarHoveredHorizontal or false
-  end
-
   -- Set initial theme state based on StateManager state
   -- This will be updated in Element:update() but we need an initial value
   if element.themeComponent then
-    if element.disabled or state.disabled then
+    local eventState = state.eventHandler or {}
+    if element.disabled or eventState.disabled then
       element._themeState = "disabled"
-    elseif element.active or state.active then
+    elseif element.active or eventState.active then
       element._themeState = "active"
-    elseif state.pressed then
+    elseif eventState._pressed and next(eventState._pressed) then
       element._themeState = "pressed"
-    elseif state.hover then
+    elseif eventState._hovered then
       element._themeState = "hover"
     else
       element._themeState = "normal"

modules/Element.lua

@@ -3160,6 +3160,110 @@ function Element:setProperty(property, value)
   end
 end
 
+-- ====================
+-- State Persistence
+-- ====================
+
+--- Save all element state for immediate mode persistence
+--- Collects state from all sub-modules and returns consolidated state
+---@return ElementStateData state Complete state snapshot
+function Element:saveState()
+  local state = {}
+  
+  -- Element-owned state
+  state._focused = self._focused
+  
+  -- EventHandler state (if exists)
+  if self._eventHandler then
+    state.eventHandler = self._eventHandler:getState()
+  end
+  
+  -- TextEditor state (if exists)
+  if self._textEditor then
+    state.textEditor = self._textEditor:getState()
+  end
+  
+  -- ScrollManager state (if exists)
+  if self._scrollManager then
+    state.scrollManager = self._scrollManager:getState()
+  end
+  
+  -- Blur cache data (for cache invalidation)
+  if self.backdropBlur or self.contentBlur then
+    state.blur = {
+      _blurX = self.x,
+      _blurY = self.y,
+      _blurWidth = self._borderBoxWidth or (self.width + self.padding.left + self.padding.right),
+      _blurHeight = self._borderBoxHeight or (self.height + self.padding.top + self.padding.bottom),
+    }
+    
+    if self.backdropBlur then
+      state.blur._backdropBlurIntensity = self.backdropBlur.intensity
+      state.blur._backdropBlurQuality = self.backdropBlur.quality
+    end
+    
+    if self.contentBlur then
+      state.blur._contentBlurIntensity = self.contentBlur.intensity
+      state.blur._contentBlurQuality = self.contentBlur.quality
+    end
+  end
+  
+  return state
+end
+
+--- Restore all element state from StateManager
+--- Distributes state to all sub-modules
+---@param state ElementStateData State to restore
+function Element:restoreState(state)
+  if not state then
+    return
+  end
+  
+  -- Restore element-owned state
+  if state._focused ~= nil then
+    self._focused = state._focused
+  end
+  
+  -- Restore EventHandler state (if exists)
+  if self._eventHandler and state.eventHandler then
+    self._eventHandler:setState(state.eventHandler)
+  end
+  
+  -- Restore TextEditor state (if exists)
+  if self._textEditor and state.textEditor then
+    self._textEditor:setState(state.textEditor)
+  end
+  
+  -- Restore ScrollManager state (if exists)
+  if self._scrollManager and state.scrollManager then
+    self._scrollManager:setState(state.scrollManager)
+  end
+  
+  -- Note: Blur cache data is used for invalidation, not restoration
+end
+
+--- Check if blur cache should be invalidated based on state changes
+---@param oldState ElementStateData? Previous state
+---@param newState ElementStateData Current state
+---@return boolean shouldInvalidate True if blur cache should be cleared
+function Element:shouldInvalidateBlurCache(oldState, newState)
+  if not oldState or not oldState.blur or not newState.blur then
+    return false
+  end
+  
+  local old = oldState.blur
+  local new = newState.blur
+  
+  -- Check if any blur-related property changed
+  return old._blurX ~= new._blurX
+    or old._blurY ~= new._blurY
+    or old._blurWidth ~= new._blurWidth
+    or old._blurHeight ~= new._blurHeight
+    or old._backdropBlurIntensity ~= new._backdropBlurIntensity
+    or old._backdropBlurQuality ~= new._backdropBlurQuality
+    or old._contentBlurIntensity ~= new._contentBlurIntensity
+    or old._contentBlurQuality ~= new._contentBlurQuality
+end
 
 --- Cleanup method to break circular references (for immediate mode)
 --- Note: Cleans internal module state but keeps structure for inspection

modules/ScrollManager.lua

@@ -617,11 +617,13 @@ end
 ---@return table State data
 function ScrollManager:getState()
   return {
-    scrollX = self._scrollX,
-    scrollY = self._scrollY,
-    scrollbarDragging = self._scrollbarDragging,
-    hoveredScrollbar = self._hoveredScrollbar,
-    scrollbarDragOffset = self._scrollbarDragOffset,
+    _scrollX = self._scrollX or 0,
+    _scrollY = self._scrollY or 0,
+    _scrollbarDragging = self._scrollbarDragging or false,
+    _hoveredScrollbar = self._hoveredScrollbar,
+    _scrollbarDragOffset = self._scrollbarDragOffset or 0,
+    _scrollbarHoveredVertical = self._scrollbarHoveredVertical or false,
+    _scrollbarHoveredHorizontal = self._scrollbarHoveredHorizontal or false,
   }
 end
 
@@ -632,21 +634,44 @@ function ScrollManager:setState(state)
     return
   end
 
-  if state.scrollX then
+  -- Support both old (scrollX) and new (_scrollX) field names for backward compatibility
+  if state._scrollX ~= nil then
+    self._scrollX = state._scrollX
+  elseif state.scrollX ~= nil then
     self._scrollX = state.scrollX
   end
-  if state.scrollY then
+  
+  if state._scrollY ~= nil then
+    self._scrollY = state._scrollY
+  elseif state.scrollY ~= nil then
     self._scrollY = state.scrollY
   end
-  if state.scrollbarDragging ~= nil then
+  
+  if state._scrollbarDragging ~= nil then
+    self._scrollbarDragging = state._scrollbarDragging
+  elseif state.scrollbarDragging ~= nil then
     self._scrollbarDragging = state.scrollbarDragging
   end
-  if state.hoveredScrollbar then
+  
+  if state._hoveredScrollbar ~= nil then
+    self._hoveredScrollbar = state._hoveredScrollbar
+  elseif state.hoveredScrollbar ~= nil then
     self._hoveredScrollbar = state.hoveredScrollbar
   end
-  if state.scrollbarDragOffset then
+  
+  if state._scrollbarDragOffset ~= nil then
+    self._scrollbarDragOffset = state._scrollbarDragOffset
+  elseif state.scrollbarDragOffset ~= nil then
     self._scrollbarDragOffset = state.scrollbarDragOffset
   end
+  
+  if state._scrollbarHoveredVertical ~= nil then
+    self._scrollbarHoveredVertical = state._scrollbarHoveredVertical
+  end
+  
+  if state._scrollbarHoveredHorizontal ~= nil then
+    self._scrollbarHoveredHorizontal = state._scrollbarHoveredHorizontal
+  end
 end
 
 --- Handle touch press for scrolling

modules/TextEditor.lua

@@ -1681,6 +1681,66 @@ function TextEditor:_getFont(element)
   return element._renderer:getFont(element)
 end
 
+--- Get current state for persistence
+---@return table state TextEditor state snapshot
+function TextEditor:getState()
+  return {
+    _cursorPosition = self._cursorPosition,
+    _selectionStart = self._selectionStart,
+    _selectionEnd = self._selectionEnd,
+    _textBuffer = self._textBuffer,
+    _cursorBlinkTimer = self._cursorBlinkTimer,
+    _cursorVisible = self._cursorVisible,
+    _cursorBlinkPaused = self._cursorBlinkPaused,
+    _cursorBlinkPauseTimer = self._cursorBlinkPauseTimer,
+    _focused = self._focused,
+  }
+end
+
+--- Restore state from persistence
+---@param state table State to restore
+function TextEditor:setState(state)
+  if not state then
+    return
+  end
+  
+  if state._cursorPosition ~= nil then
+    self._cursorPosition = state._cursorPosition
+  end
+  
+  if state._selectionStart ~= nil then
+    self._selectionStart = state._selectionStart
+  end
+  
+  if state._selectionEnd ~= nil then
+    self._selectionEnd = state._selectionEnd
+  end
+  
+  if state._textBuffer ~= nil then
+    self._textBuffer = state._textBuffer
+  end
+  
+  if state._cursorBlinkTimer ~= nil then
+    self._cursorBlinkTimer = state._cursorBlinkTimer
+  end
+  
+  if state._cursorVisible ~= nil then
+    self._cursorVisible = state._cursorVisible
+  end
+  
+  if state._cursorBlinkPaused ~= nil then
+    self._cursorBlinkPaused = state._cursorBlinkPaused
+  end
+  
+  if state._cursorBlinkPauseTimer ~= nil then
+    self._cursorBlinkPauseTimer = state._cursorBlinkPauseTimer
+  end
+  
+  if state._focused ~= nil then
+    self._focused = state._focused
+  end
+end
+
 ---Save state to StateManager (for immediate mode)
 ---@param element Element? The parent element
 function TextEditor:_saveState(element)

modules/types.lua

@@ -187,3 +187,23 @@ local TransformProps
 ---@field gcStepSize number? -- Work units per GC step, higher = more aggressive (default: 200)
 ---@field immediateModeBlurOptimizations boolean? -- Cache blur canvases in immediate mode to avoid re-rendering each frame (default: true)
 local FlexLoveConfig = {}
+
+--=====================================--
+-- For State Persistence
+--=====================================--
+---@class ElementStateData
+---@field _focused boolean?
+---@field eventHandler table? -- EventHandler state
+---@field textEditor table? -- TextEditor state
+---@field scrollManager table? -- ScrollManager state
+---@field blur BlurCacheData? -- Blur cache invalidation data
+
+---@class BlurCacheData
+---@field _blurX number
+---@field _blurY number
+---@field _blurWidth number
+---@field _blurHeight number
+---@field _backdropBlurIntensity number?
+---@field _backdropBlurQuality string?
+---@field _contentBlurIntensity number?
+---@field _contentBlurQuality string?

testing/__tests__/scroll_manager_test.lua

@@ -915,11 +915,11 @@ function TestScrollManagerEdgeCases:testGetState()
   sm._scrollbarDragOffset = 10
 
   local state = sm:getState()
-  luaunit.assertEquals(state.scrollX, 50)
-  luaunit.assertEquals(state.scrollY, 75)
-  luaunit.assertTrue(state.scrollbarDragging)
-  luaunit.assertEquals(state.hoveredScrollbar, "vertical")
-  luaunit.assertEquals(state.scrollbarDragOffset, 10)
+  luaunit.assertEquals(state._scrollX, 50)
+  luaunit.assertEquals(state._scrollY, 75)
+  luaunit.assertTrue(state._scrollbarDragging)
+  luaunit.assertEquals(state._hoveredScrollbar, "vertical")
+  luaunit.assertEquals(state._scrollbarDragOffset, 10)
 end
 
 function TestScrollManagerEdgeCases:testSetStateWithNil()