@tldraw/editor
Version:
tldraw infinite canvas SDK (editor).
292 lines (291 loc) • 11.5 kB
JavaScript
"use strict";
var __create = Object.create;
var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __getProtoOf = Object.getPrototypeOf;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __export = (target, all) => {
for (var name in all)
__defProp(target, name, { get: all[name], enumerable: true });
};
var __copyProps = (to, from, except, desc) => {
if (from && typeof from === "object" || typeof from === "function") {
for (let key of __getOwnPropNames(from))
if (!__hasOwnProp.call(to, key) && key !== except)
__defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
}
return to;
};
var __toESM = (mod, isNodeMode, target) => (target = mod != null ? __create(__getProtoOf(mod)) : {}, __copyProps(
// If the importer is in node compatibility mode or this is not an ESM
// file that has been converted to a CommonJS file using a Babel-
// compatible transform (i.e. "__esModule" has not been set), then set
// "default" to the CommonJS "module.exports" for node compatibility.
isNodeMode || !mod || !mod.__esModule ? __defProp(target, "default", { value: mod, enumerable: true }) : target,
mod
));
var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
var useGestureEvents_exports = {};
__export(useGestureEvents_exports, {
useGestureEvents: () => useGestureEvents
});
module.exports = __toCommonJS(useGestureEvents_exports);
var React = __toESM(require("react"), 1);
var import_environment = require("../globals/environment");
var import_Vec = require("../primitives/Vec");
var import_dom = require("../utils/dom");
var import_keyboard = require("../utils/keyboard");
var import_normalizeWheel = require("../utils/normalizeWheel");
var import_useEditor = require("./useEditor");
function useGestureEvents(ref) {
const editor = (0, import_useEditor.useEditor)();
React.useEffect(() => {
const elm = ref.current;
if (!elm) return;
let pinchState = "not sure";
function onWheel(event) {
if (!editor.getInstanceState().isFocused) {
return;
}
pinchState = "not sure";
const editingShapeId = editor.getEditingShapeId();
if (editingShapeId) {
const shape = editor.getShape(editingShapeId);
if (shape) {
const util = editor.getShapeUtil(shape);
if (util.canScroll(shape)) {
const bounds = editor.getShapePageBounds(editingShapeId);
if (bounds?.containsPoint(editor.inputs.getCurrentPagePoint())) {
return;
}
}
}
}
(0, import_dom.preventDefault)(event);
event.stopPropagation();
const delta = (0, import_normalizeWheel.normalizeWheel)(event);
if (delta.x === 0 && delta.y === 0) return;
const info = {
type: "wheel",
name: "wheel",
delta,
point: new import_Vec.Vec(event.clientX, event.clientY),
shiftKey: event.shiftKey,
altKey: event.altKey,
ctrlKey: event.metaKey || event.ctrlKey,
metaKey: event.metaKey,
accelKey: (0, import_keyboard.isAccelKey)(event)
};
editor.dispatch(info);
}
let initDistanceBetweenFingers = 1;
let initZoom = 1;
let currDistanceBetweenFingers = 0;
const initPointBetweenFingers = new import_Vec.Vec();
const prevPointBetweenFingers = new import_Vec.Vec();
let activeTouches = [];
function getScaleBounds() {
const baseZoom = editor.getBaseZoom();
const { zoomSteps, zoomSpeed } = editor.getCameraOptions();
const zoomMin = zoomSteps[0] * baseZoom;
const zoomMax = zoomSteps[zoomSteps.length - 1] * baseZoom;
return {
min: zoomMin ** (1 / zoomSpeed),
max: zoomMax ** (1 / zoomSpeed)
};
}
function getScaleFrom() {
const { zoomSpeed } = editor.getCameraOptions();
return editor.getZoomLevel() ** (1 / zoomSpeed);
}
let scaleOffset = 1;
let initScaleFrom = 1;
function updatePinchState(isSafariTrackpadPinch) {
if (isSafariTrackpadPinch) {
pinchState = "zooming";
}
if (pinchState === "zooming") {
return;
}
const touchDistance = Math.abs(currDistanceBetweenFingers - initDistanceBetweenFingers);
const originDistance = import_Vec.Vec.Dist(initPointBetweenFingers, prevPointBetweenFingers);
switch (pinchState) {
case "not sure": {
if (touchDistance > 24) {
pinchState = "zooming";
} else if (originDistance > 16) {
pinchState = "panning";
}
break;
}
case "panning": {
if (touchDistance > 64) {
pinchState = "zooming";
}
break;
}
}
}
function dispatchPinchEvent(name, origin, delta, zoom, event) {
editor.dispatch({
type: "pinch",
name,
point: { x: origin.x, y: origin.y, z: zoom },
delta,
shiftKey: event.shiftKey,
altKey: event.altKey,
ctrlKey: event.metaKey || event.ctrlKey,
metaKey: event.metaKey,
accelKey: (0, import_keyboard.isAccelKey)(event)
});
}
function getOriginAndDistance(t0, t1) {
const origin = {
x: (t0.clientX + t1.clientX) / 2,
y: (t0.clientY + t1.clientY) / 2
};
const distance = Math.hypot(t1.clientX - t0.clientX, t1.clientY - t0.clientY);
return { origin, distance };
}
function onTouchStart(event) {
if (!(event.target === elm || elm?.contains(event.target))) return;
activeTouches = Array.from(event.touches);
if (activeTouches.length === 2) {
pinchState = "not sure";
const { origin, distance } = getOriginAndDistance(activeTouches[0], activeTouches[1]);
prevPointBetweenFingers.x = origin.x;
prevPointBetweenFingers.y = origin.y;
initPointBetweenFingers.x = origin.x;
initPointBetweenFingers.y = origin.y;
initDistanceBetweenFingers = Math.max(distance, 1);
currDistanceBetweenFingers = distance;
initZoom = editor.getZoomLevel();
initScaleFrom = getScaleFrom();
scaleOffset = initScaleFrom;
dispatchPinchEvent("pinch_start", origin, { x: 0, y: 0 }, editor.getZoomLevel(), event);
}
}
function onTouchMove(event) {
activeTouches = Array.from(event.touches);
if (activeTouches.length < 2) return;
const { origin, distance } = getOriginAndDistance(activeTouches[0], activeTouches[1]);
currDistanceBetweenFingers = distance;
const dx = origin.x - prevPointBetweenFingers.x;
const dy = origin.y - prevPointBetweenFingers.y;
prevPointBetweenFingers.x = origin.x;
prevPointBetweenFingers.y = origin.y;
updatePinchState(false);
const bounds = getScaleBounds();
const rawScale = initScaleFrom * (distance / initDistanceBetweenFingers);
scaleOffset = Math.min(bounds.max, Math.max(bounds.min, rawScale));
switch (pinchState) {
case "zooming": {
const currZoom = scaleOffset ** editor.getCameraOptions().zoomSpeed;
dispatchPinchEvent("pinch", origin, { x: dx, y: dy }, currZoom, event);
break;
}
case "panning": {
dispatchPinchEvent("pinch", origin, { x: dx, y: dy }, initZoom, event);
break;
}
}
}
function onTouchEnd(event) {
const wasPinching = activeTouches.length >= 2;
activeTouches = Array.from(event.touches);
if (wasPinching && activeTouches.length < 2) {
const scale = scaleOffset ** editor.getCameraOptions().zoomSpeed;
const origin = { ...prevPointBetweenFingers };
pinchState = "not sure";
editor.timers.requestAnimationFrame(() => {
dispatchPinchEvent("pinch_end", origin, { x: origin.x, y: origin.y }, scale, event);
});
}
}
let safariGestureInitialScale = 1;
function onGestureStart(event) {
const e = event;
if (!(e.target === elm || elm?.contains(e.target))) return;
(0, import_dom.preventDefault)(e);
e.stopPropagation();
pinchState = "not sure";
safariGestureInitialScale = getScaleFrom();
scaleOffset = safariGestureInitialScale;
initZoom = editor.getZoomLevel();
prevPointBetweenFingers.x = e.clientX;
prevPointBetweenFingers.y = e.clientY;
initPointBetweenFingers.x = e.clientX;
initPointBetweenFingers.y = e.clientY;
initDistanceBetweenFingers = 1;
currDistanceBetweenFingers = 1;
dispatchPinchEvent(
"pinch_start",
{ x: e.clientX, y: e.clientY },
{ x: 0, y: 0 },
editor.getZoomLevel(),
e
);
}
function onGestureChange(event) {
const e = event;
if (!(e.target === elm || elm?.contains(e.target))) return;
(0, import_dom.preventDefault)(e);
e.stopPropagation();
const dx = e.clientX - prevPointBetweenFingers.x;
const dy = e.clientY - prevPointBetweenFingers.y;
prevPointBetweenFingers.x = e.clientX;
prevPointBetweenFingers.y = e.clientY;
const bounds = getScaleBounds();
const rawScale = safariGestureInitialScale * e.scale;
scaleOffset = Math.min(bounds.max, Math.max(bounds.min, rawScale));
currDistanceBetweenFingers = e.scale * initDistanceBetweenFingers;
updatePinchState(true);
const currZoom = scaleOffset ** editor.getCameraOptions().zoomSpeed;
dispatchPinchEvent("pinch", { x: e.clientX, y: e.clientY }, { x: dx, y: dy }, currZoom, e);
}
function onGestureEnd(event) {
const e = event;
if (!(e.target === elm || elm?.contains(e.target))) return;
(0, import_dom.preventDefault)(e);
e.stopPropagation();
const scale = scaleOffset ** editor.getCameraOptions().zoomSpeed;
pinchState = "not sure";
editor.timers.requestAnimationFrame(() => {
dispatchPinchEvent(
"pinch_end",
{ x: e.clientX, y: e.clientY },
{ x: e.clientX, y: e.clientY },
scale,
e
);
});
}
elm.addEventListener("wheel", onWheel, { passive: false });
const useGestureEvents2 = !import_environment.tlenv.isIos && "GestureEvent" in window;
if (useGestureEvents2) {
elm.addEventListener("gesturestart", onGestureStart);
elm.addEventListener("gesturechange", onGestureChange);
elm.addEventListener("gestureend", onGestureEnd);
} else {
elm.addEventListener("touchstart", onTouchStart);
elm.addEventListener("touchmove", onTouchMove);
elm.addEventListener("touchend", onTouchEnd);
elm.addEventListener("touchcancel", onTouchEnd);
}
return () => {
elm.removeEventListener("wheel", onWheel);
if (useGestureEvents2) {
elm.removeEventListener("gesturestart", onGestureStart);
elm.removeEventListener("gesturechange", onGestureChange);
elm.removeEventListener("gestureend", onGestureEnd);
} else {
elm.removeEventListener("touchstart", onTouchStart);
elm.removeEventListener("touchmove", onTouchMove);
elm.removeEventListener("touchend", onTouchEnd);
elm.removeEventListener("touchcancel", onTouchEnd);
}
};
}, [editor, ref]);
}
//# sourceMappingURL=useGestureEvents.js.map