Initial commit

node_modules/d3-drag/dist/d3-drag.js

@@ -0,0 +1,234 @@
+// https://d3js.org/d3-drag/ v1.2.3 Copyright 2018 Mike Bostock
+(function (global, factory) {
+typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('d3-selection'), require('d3-dispatch')) :
+typeof define === 'function' && define.amd ? define(['exports', 'd3-selection', 'd3-dispatch'], factory) :
+(factory((global.d3 = global.d3 || {}),global.d3,global.d3));
+}(this, (function (exports,d3Selection,d3Dispatch) { 'use strict';
+
+function nopropagation() {
+  d3Selection.event.stopImmediatePropagation();
+}
+
+function noevent() {
+  d3Selection.event.preventDefault();
+  d3Selection.event.stopImmediatePropagation();
+}
+
+function nodrag(view) {
+  var root = view.document.documentElement,
+      selection = d3Selection.select(view).on("dragstart.drag", noevent, true);
+  if ("onselectstart" in root) {
+    selection.on("selectstart.drag", noevent, true);
+  } else {
+    root.__noselect = root.style.MozUserSelect;
+    root.style.MozUserSelect = "none";
+  }
+}
+
+function yesdrag(view, noclick) {
+  var root = view.document.documentElement,
+      selection = d3Selection.select(view).on("dragstart.drag", null);
+  if (noclick) {
+    selection.on("click.drag", noevent, true);
+    setTimeout(function() { selection.on("click.drag", null); }, 0);
+  }
+  if ("onselectstart" in root) {
+    selection.on("selectstart.drag", null);
+  } else {
+    root.style.MozUserSelect = root.__noselect;
+    delete root.__noselect;
+  }
+}
+
+function constant(x) {
+  return function() {
+    return x;
+  };
+}
+
+function DragEvent(target, type, subject, id, active, x, y, dx, dy, dispatch) {
+  this.target = target;
+  this.type = type;
+  this.subject = subject;
+  this.identifier = id;
+  this.active = active;
+  this.x = x;
+  this.y = y;
+  this.dx = dx;
+  this.dy = dy;
+  this._ = dispatch;
+}
+
+DragEvent.prototype.on = function() {
+  var value = this._.on.apply(this._, arguments);
+  return value === this._ ? this : value;
+};
+
+// Ignore right-click, since that should open the context menu.
+function defaultFilter() {
+  return !d3Selection.event.button;
+}
+
+function defaultContainer() {
+  return this.parentNode;
+}
+
+function defaultSubject(d) {
+  return d == null ? {x: d3Selection.event.x, y: d3Selection.event.y} : d;
+}
+
+function defaultTouchable() {
+  return "ontouchstart" in this;
+}
+
+function drag() {
+  var filter = defaultFilter,
+      container = defaultContainer,
+      subject = defaultSubject,
+      touchable = defaultTouchable,
+      gestures = {},
+      listeners = d3Dispatch.dispatch("start", "drag", "end"),
+      active = 0,
+      mousedownx,
+      mousedowny,
+      mousemoving,
+      touchending,
+      clickDistance2 = 0;
+
+  function drag(selection) {
+    selection
+        .on("mousedown.drag", mousedowned)
+      .filter(touchable)
+        .on("touchstart.drag", touchstarted)
+        .on("touchmove.drag", touchmoved)
+        .on("touchend.drag touchcancel.drag", touchended)
+        .style("touch-action", "none")
+        .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
+  }
+
+  function mousedowned() {
+    if (touchending || !filter.apply(this, arguments)) return;
+    var gesture = beforestart("mouse", container.apply(this, arguments), d3Selection.mouse, this, arguments);
+    if (!gesture) return;
+    d3Selection.select(d3Selection.event.view).on("mousemove.drag", mousemoved, true).on("mouseup.drag", mouseupped, true);
+    nodrag(d3Selection.event.view);
+    nopropagation();
+    mousemoving = false;
+    mousedownx = d3Selection.event.clientX;
+    mousedowny = d3Selection.event.clientY;
+    gesture("start");
+  }
+
+  function mousemoved() {
+    noevent();
+    if (!mousemoving) {
+      var dx = d3Selection.event.clientX - mousedownx, dy = d3Selection.event.clientY - mousedowny;
+      mousemoving = dx * dx + dy * dy > clickDistance2;
+    }
+    gestures.mouse("drag");
+  }
+
+  function mouseupped() {
+    d3Selection.select(d3Selection.event.view).on("mousemove.drag mouseup.drag", null);
+    yesdrag(d3Selection.event.view, mousemoving);
+    noevent();
+    gestures.mouse("end");
+  }
+
+  function touchstarted() {
+    if (!filter.apply(this, arguments)) return;
+    var touches = d3Selection.event.changedTouches,
+        c = container.apply(this, arguments),
+        n = touches.length, i, gesture;
+
+    for (i = 0; i < n; ++i) {
+      if (gesture = beforestart(touches[i].identifier, c, d3Selection.touch, this, arguments)) {
+        nopropagation();
+        gesture("start");
+      }
+    }
+  }
+
+  function touchmoved() {
+    var touches = d3Selection.event.changedTouches,
+        n = touches.length, i, gesture;
+
+    for (i = 0; i < n; ++i) {
+      if (gesture = gestures[touches[i].identifier]) {
+        noevent();
+        gesture("drag");
+      }
+    }
+  }
+
+  function touchended() {
+    var touches = d3Selection.event.changedTouches,
+        n = touches.length, i, gesture;
+
+    if (touchending) clearTimeout(touchending);
+    touchending = setTimeout(function() { touchending = null; }, 500); // Ghost clicks are delayed!
+    for (i = 0; i < n; ++i) {
+      if (gesture = gestures[touches[i].identifier]) {
+        nopropagation();
+        gesture("end");
+      }
+    }
+  }
+
+  function beforestart(id, container, point, that, args) {
+    var p = point(container, id), s, dx, dy,
+        sublisteners = listeners.copy();
+
+    if (!d3Selection.customEvent(new DragEvent(drag, "beforestart", s, id, active, p[0], p[1], 0, 0, sublisteners), function() {
+      if ((d3Selection.event.subject = s = subject.apply(that, args)) == null) return false;
+      dx = s.x - p[0] || 0;
+      dy = s.y - p[1] || 0;
+      return true;
+    })) return;
+
+    return function gesture(type) {
+      var p0 = p, n;
+      switch (type) {
+        case "start": gestures[id] = gesture, n = active++; break;
+        case "end": delete gestures[id], --active; // nobreak
+        case "drag": p = point(container, id), n = active; break;
+      }
+      d3Selection.customEvent(new DragEvent(drag, type, s, id, n, p[0] + dx, p[1] + dy, p[0] - p0[0], p[1] - p0[1], sublisteners), sublisteners.apply, sublisteners, [type, that, args]);
+    };
+  }
+
+  drag.filter = function(_) {
+    return arguments.length ? (filter = typeof _ === "function" ? _ : constant(!!_), drag) : filter;
+  };
+
+  drag.container = function(_) {
+    return arguments.length ? (container = typeof _ === "function" ? _ : constant(_), drag) : container;
+  };
+
+  drag.subject = function(_) {
+    return arguments.length ? (subject = typeof _ === "function" ? _ : constant(_), drag) : subject;
+  };
+
+  drag.touchable = function(_) {
+    return arguments.length ? (touchable = typeof _ === "function" ? _ : constant(!!_), drag) : touchable;
+  };
+
+  drag.on = function() {
+    var value = listeners.on.apply(listeners, arguments);
+    return value === listeners ? drag : value;
+  };
+
+  drag.clickDistance = function(_) {
+    return arguments.length ? (clickDistance2 = (_ = +_) * _, drag) : Math.sqrt(clickDistance2);
+  };
+
+  return drag;
+}
+
+exports.drag = drag;
+exports.dragDisable = nodrag;
+exports.dragEnable = yesdrag;
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+})));