feat(pointer)!: change selection per pointer

src/pointer/pointerAction.ts

@@ -1,12 +1,16 @@
-import {Coords, wait} from '../utils'
+import {wait} from '../utils'
 import {pointerMove, PointerMoveAction} from './pointerMove'
 import {pointerPress, PointerPressAction} from './pointerPress'
-import {inputDeviceState, pointerOptions, pointerState} from './types'
+import {
+  inputDeviceState,
+  pointerOptions,
+  pointerState,
+  PointerTarget,
+  SelectionTarget,
+} from './types'
 
-export type PointerActionTarget = {
-  target?: Element
-  coords?: Partial<Coords>
-}
+export type PointerActionTarget = Partial<PointerTarget> &
+  Partial<SelectionTarget>
 
 export type PointerAction = PointerActionTarget &
   (
@@ -34,12 +38,11 @@ export async function pointerAction(
 
     const target =
       action.target ?? getPrevTarget(pointerName, state.pointerState)
-    const coords = completeCoords({
-      ...(pointerName in state.pointerState.position
+    const coords =
+      action.coords ??
+      (pointerName in state.pointerState.position
         ? state.pointerState.position[pointerName].coords
-        : undefined),
-      ...action.coords,
-    })
+        : undefined)
 
     const promise =
       'keyDef' in action
@@ -70,16 +73,3 @@ function getPrevTarget(pointerName: string, state: pointerState) {
 
   return state.position[pointerName].target as Element
 }
-
-function completeCoords({
-  x = 0,
-  y = 0,
-  clientX = x,
-  clientY = y,
-  offsetX = x,
-  offsetY = y,
-  pageX = clientX,
-  pageY = clientY,
-}: Partial<Coords>) {
-  return {x, y, clientX, clientY, offsetX, offsetY, pageX, pageY}
-}

src/pointer/pointerMove.ts

@@ -1,17 +1,19 @@
+import {setUISelection} from '../document'
 import {
-  Coords,
+  PointerCoords,
   firePointerEvent,
   isDescendantOrSelf,
   isDisabled,
 } from '../utils'
-import {inputDeviceState, PointerTarget} from './types'
+import {resolveSelectionTarget} from './resolveSelectionTarget'
+import {inputDeviceState, PointerTarget, SelectionTarget} from './types'
 
-export interface PointerMoveAction extends PointerTarget {
+export interface PointerMoveAction extends PointerTarget, SelectionTarget {
   pointerName?: string
 }
 
 export async function pointerMove(
-  {pointerName = 'mouse', target, coords}: PointerMoveAction,
+  {pointerName = 'mouse', target, coords, node, offset}: PointerMoveAction,
   {pointerState, keyboardState}: inputDeviceState,
 ): Promise<void> {
   if (!(pointerName in pointerState.position)) {
@@ -25,6 +27,7 @@ export async function pointerMove(
     pointerType,
     target: prevTarget,
     coords: prevCoords,
+    selectionRange,
   } = pointerState.position[pointerName]
 
   if (prevTarget && prevTarget !== target) {
@@ -36,7 +39,11 @@ export async function pointerMove(
     }
   }
 
-  pointerState.position[pointerName] = {pointerId, pointerType, target, coords}
+  pointerState.position[pointerName] = {
+    ...pointerState.position[pointerName],
+    target,
+    coords,
+  }
 
   if (prevTarget !== target) {
     if (!prevTarget || !isDescendantOrSelf(prevTarget, target)) {
@@ -49,14 +56,44 @@ export async function pointerMove(
   // Here we could probably calculate a few coords leading up to the final position
   fireMove(target, coords)
 
-  function fireMove(eventTarget: Element, eventCoords: Coords) {
+  if (selectionRange) {
+    const selectionFocus = resolveSelectionTarget({target, node, offset})
+    if (
+      'node' in selectionRange &&
+      selectionFocus.node === selectionRange.node
+    ) {
+      setUISelection(
+        selectionRange.node,
+        Math.min(selectionRange.start, selectionFocus.offset),
+        Math.max(selectionRange.end, selectionFocus.offset),
+      )
+    } else /* istanbul ignore else */ if ('setEnd' in selectionRange) {
+      const range = selectionRange.cloneRange()
+      const cmp = selectionRange.comparePoint(
+        selectionFocus.node,
+        selectionFocus.offset,
+      )
+      if (cmp < 0) {
+        range.setStart(selectionFocus.node, selectionFocus.offset)
+      } else if (cmp > 0) {
+        range.setEnd(selectionFocus.node, selectionFocus.offset)
+      }
+
+      // TODO: support multiple ranges
+      const selection = target.ownerDocument.getSelection() as Selection
+      selection.removeAllRanges()
+      selection.addRange(range.cloneRange())
+    }
+  }
+
+  function fireMove(eventTarget: Element, eventCoords?: PointerCoords) {
     fire(eventTarget, 'pointermove', eventCoords)
     if (pointerType === 'mouse' && !isDisabled(eventTarget)) {
       fire(eventTarget, 'mousemove', eventCoords)
     }
   }
 
-  function fireLeave(eventTarget: Element, eventCoords: Coords) {
+  function fireLeave(eventTarget: Element, eventCoords?: PointerCoords) {
     fire(eventTarget, 'pointerout', eventCoords)
     fire(eventTarget, 'pointerleave', eventCoords)
     if (pointerType === 'mouse' && !isDisabled(eventTarget)) {
@@ -65,7 +102,7 @@ export async function pointerMove(
     }
   }
 
-  function fireEnter(eventTarget: Element, eventCoords: Coords) {
+  function fireEnter(eventTarget: Element, eventCoords?: PointerCoords) {
     fire(eventTarget, 'pointerover', eventCoords)
     fire(eventTarget, 'pointerenter', eventCoords)
     if (pointerType === 'mouse' && !isDisabled(eventTarget)) {
@@ -74,7 +111,11 @@ export async function pointerMove(
     }
   }
 
-  function fire(eventTarget: Element, type: string, eventCoords: Coords) {
+  function fire(
+    eventTarget: Element,
+    type: string,
+    eventCoords?: PointerCoords,
+  ) {
     return firePointerEvent(eventTarget, type, {
       pointerState,
       keyboardState,