Restore d3.{mouse,touch,touches}; add d3.pointers.

src/index.js

@@ -2,13 +2,17 @@ export {default as create} from "./create.js";
 export {default as creator} from "./creator.js";
 export {default as local} from "./local.js";
 export {default as matcher} from "./matcher.js";
+export {default as mouse} from "./mouse.js";
 export {default as namespace} from "./namespace.js";
 export {default as namespaces} from "./namespaces.js";
 export {default as pointer} from "./pointer.js";
+export {default as pointers} from "./pointers.js";
 export {default as select} from "./select.js";
 export {default as selectAll} from "./selectAll.js";
 export {default as selection} from "./selection/index.js";
 export {default as selector} from "./selector.js";
 export {default as selectorAll} from "./selectorAll.js";
 export {styleValue as style} from "./selection/style.js";
+export {default as touch} from "./touch.js";
+export {default as touches} from "./touches.js";
 export {default as window} from "./window.js";

src/mouse.js

@@ -0,0 +1,6 @@
+import sourceEvent from "./sourceEvent.js";
+import pointer from "./pointer.js";
+
+export default function(event, node) {
+  return pointer(sourceEvent(event), node);
+}

src/pointers.js

@@ -0,0 +1,5 @@
+import pointer from "./pointer.js";
+
+export default function(events, node) {
+  return Array.from(events, event => pointer(event, node));
+}

src/sourceEvent.js

@@ -0,0 +1,5 @@
+export default function(event) {
+  let sourceEvent;
+  while (sourceEvent = event.sourceEvent) event = sourceEvent;
+  return event;
+}

src/touch.js

@@ -0,0 +1,12 @@
+import sourceEvent from "./sourceEvent.js";
+import pointer from "./pointer.js";
+
+export default function(event, node, identifier) {
+  const touches = sourceEvent(event).touches;
+  for (var i = 0, n = touches.length, touch; i < n; ++i) {
+    if ((touch = touches[i]).identifier === identifier) {
+      return pointer(touch, node);
+    }
+  }
+  return null;
+}

src/touches.js

@@ -0,0 +1,6 @@
+import sourceEvent from "./sourceEvent.js";
+import pointers from "./pointers.js";
+
+export default function(event, node) {
+  return pointers(sourceEvent(event).touches, node);
+}