neft

'use strict' utils = require 'src/utils' signal = require 'src/signal' {sin, cos} = Math {emitSignal} = signal.Emitter isPointInBox = (ex, ey, x, y, w, h) -> ex >= x and ey >= y and ex < x + w and ey < y + h module.exports = (impl) -> PROPAGATE_UP = 1<<0 STOP_ASIDE_PROPAGATION = 1<<1 STOP_PROPAGATION = 1<<2 captureItems = do -> checkItem = (item, ex, ey, onItem, parentX, parentY, parentScale) -> result = 0 x = y = w = h = scale = rotation = t1 = t2 = rey = rsin = rcos = 0.0 # omit not visible children unless item._visible return result # omit children with no pointer events listeners data = item._impl # omit children with disabled pointer pointer = item._pointer if pointer and not pointer._enabled return result # get coordinates x = parentX + item._x * parentScale y = parentY + item._y * parentScale w = item._width * parentScale h = item._height * parentScale scale = item._scale rotation = item._rotation # add scale if scale isnt 1 t1 = w * scale t2 = h * scale x += (w - t1) / 2 y += (h - t2) / 2 w = t1 h = t2 # add rotation if rotation isnt 0 rsin = sin -rotation rcos = cos -rotation t1 = x + w/2 t2 = y + h/2 rey = rcos * (ex-t1) - rsin * (ey-t2) + t1 ey = rsin * (ex-t1) + rcos * (ey-t2) + t2 ex = rey # omit outer point for clipped items if item._clip and not isPointInBox(ex, ey, x, y, w, h) return result unless result & STOP_ASIDE_PROPAGATION # test children if item._children child = item._children.topChild while child result |= checkItem(child, ex, ey, onItem, x, y, scale) if result & STOP_PROPAGATION return result if result & STOP_ASIDE_PROPAGATION break child = child.belowSibling # test content item if item._contentItem and not (result & STOP_ASIDE_PROPAGATION) result |= checkItem( item._contentItem, ex, ey, onItem, x - item.contentX * parentScale, y - item.contentY * parentScale, scale ) if result & STOP_PROPAGATION return result # test this child if result & PROPAGATE_UP or isPointInBox(ex, ey, x, y, w, h) result |= onItem(item) return result (item, ex, ey, onItem) -> if item return checkItem item, ex, ey, onItem, 0, 0, 1 return 0 itemsToRelease = [] itemsToMove = [] pressedItems = [] hoverItems = [] impl.Renderer.onReady -> {Device} = impl.Renderer {event} = impl.Renderer.Item.Pointer getEventStatus = -> if event._checkSiblings PROPAGATE_UP else PROPAGATE_UP | STOP_ASIDE_PROPAGATION # support press event Device.onPointerPress do -> onItem = (item) -> {capturePointer} = item._impl if capturePointer & CLICK pressedItems.push item if capturePointer & PRESS event._ensureRelease = event._ensureMove = true emitSignal item.pointer, 'onPress', event if event._ensureRelease itemsToRelease.push item if event._ensureMove itemsToMove.push item if event._stopPropagation return STOP_PROPAGATION return getEventStatus() PROPAGATE_UP | STOP_ASIDE_PROPAGATION (e) -> event._stopPropagation = false event._checkSiblings = false captureItems impl.window, e._x, e._y, onItem return # support release and click events Device.onPointerRelease do -> onItem = (item) -> data = item._impl {capturePointer} = data if capturePointer & RELEASE emitSignal item._pointer, 'onRelease', event if capturePointer & PRESS index = itemsToRelease.indexOf item if index >= 0 itemsToRelease[index] = null if capturePointer & CLICK if utils.has(pressedItems, item) emitSignal item.pointer, 'onClick', event if capturePointer & (RELEASE | CLICK) if event._stopPropagation return STOP_PROPAGATION return getEventStatus() PROPAGATE_UP | STOP_ASIDE_PROPAGATION (e) -> event._stopPropagation = false event._checkSiblings = false captureItems impl.window, e._x, e._y, onItem unless event._stopPropagation for item in itemsToRelease by -1 if item emitSignal item.pointer, 'onRelease', event if event._stopPropagation break utils.clear itemsToRelease utils.clear itemsToMove utils.clear pressedItems return # support move, enter and exit events Device.onPointerMove do -> flag = 0 onItem = (item) -> data = item._impl {capturePointer} = data if capturePointer & (ENTER | EXIT | MOVE) data.pointerMoveFlag = flag if capturePointer & (ENTER | EXIT) and not data.pointerHover data.pointerHover = true hoverItems.push item emitSignal item.pointer, 'onEnter', event if capturePointer & MOVE emitSignal item._pointer, 'onMove', event if capturePointer & (ENTER | EXIT | MOVE) if event._stopPropagation return STOP_PROPAGATION return getEventStatus() PROPAGATE_UP | STOP_ASIDE_PROPAGATION (e) -> event._stopPropagation = false event._checkSiblings = false flag = (flag % 2) + 1 captureItems impl.window, e._x, e._y, onItem for item in itemsToMove if event._stopPropagation break data = item._impl if data.pointerMoveFlag isnt flag emitSignal item.pointer, 'onMove', event for item, i in hoverItems by -1 data = item._impl if data.pointerHover and data.pointerMoveFlag isnt flag data.pointerHover = false data.pointerMoveFlag = 0 hoverItems.splice i, 1 emitSignal item.pointer, 'onExit', event for item in itemsToMove data = item._impl if data.pointerMoveFlag isnt flag data.pointerMoveFlag = flag return # support wheel event Device.onPointerWheel do -> onItem = (item) -> event._stopPropagation = true if item._impl.capturePointer & WHEEL if (pointer = item._pointer) and not signal.isEmpty(pointer.onWheel) emitSignal pointer, 'onWheel', event if event._stopPropagation return STOP_PROPAGATION return getEventStatus() PROPAGATE_UP | STOP_ASIDE_PROPAGATION (e) -> event._checkSiblings = false captureItems impl.window, e._x, e._y, onItem return i = 0 # TODO: support drag events EVENTS: EVENTS = onPress: PRESS = 1 << i++ onRelease: RELEASE = 1 << i++ onMove: MOVE = 1 << i++ onWheel: WHEEL = 1 << i++ onClick: CLICK = 1 << i++ onEnter: ENTER = 1 << i++ onExit: EXIT = 1 << i++ # onDragStart: 1 << i++ # onDragEnd: 1 << i++ # onDragEnter: 1 << i++ # onDragExit: 1 << i++ # onDrop: 1 << i++ DATA: pointerHover: false pointerMoveFlag: 0 capturePointer: 0 attachItemSignal: (signal) -> item = @_ref data = item._impl unless eventId = EVENTS[signal] return data.capturePointer |= eventId return setItemPointerEnabled: (val) -> return setItemPointerDraggable: (val) -> return setItemPointerDragActive: (val) -> return