335 lines
21 KiB
JavaScript
335 lines
21 KiB
JavaScript
function _typeof(o) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (o) { return typeof o; } : function (o) { return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o; }, _typeof(o); }
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function _regeneratorRuntime() { "use strict"; /*! regenerator-runtime -- Copyright (c) 2014-present, Facebook, Inc. -- license (MIT): https://github.com/facebook/regenerator/blob/main/LICENSE */ _regeneratorRuntime = function _regeneratorRuntime() { return e; }; var t, e = {}, r = Object.prototype, n = r.hasOwnProperty, o = Object.defineProperty || function (t, e, r) { t[e] = r.value; }, i = "function" == typeof Symbol ? Symbol : {}, a = i.iterator || "@@iterator", c = i.asyncIterator || "@@asyncIterator", u = i.toStringTag || "@@toStringTag"; function define(t, e, r) { return Object.defineProperty(t, e, { value: r, enumerable: !0, configurable: !0, writable: !0 }), t[e]; } try { define({}, ""); } catch (t) { define = function define(t, e, r) { return t[e] = r; }; } function wrap(t, e, r, n) { var i = e && e.prototype instanceof Generator ? e : Generator, a = Object.create(i.prototype), c = new Context(n || []); return o(a, "_invoke", { value: makeInvokeMethod(t, r, c) }), a; } function tryCatch(t, e, r) { try { return { type: "normal", arg: t.call(e, r) }; } catch (t) { return { type: "throw", arg: t }; } } e.wrap = wrap; var h = "suspendedStart", l = "suspendedYield", f = "executing", s = "completed", y = {}; function Generator() {} function GeneratorFunction() {} function GeneratorFunctionPrototype() {} var p = {}; define(p, a, function () { return this; }); var d = Object.getPrototypeOf, v = d && d(d(values([]))); v && v !== r && n.call(v, a) && (p = v); var g = GeneratorFunctionPrototype.prototype = Generator.prototype = Object.create(p); function defineIteratorMethods(t) { ["next", "throw", "return"].forEach(function (e) { define(t, e, function (t) { return this._invoke(e, t); }); }); } function AsyncIterator(t, e) { function invoke(r, o, i, a) { var c = tryCatch(t[r], t, o); if ("throw" !== c.type) { var u = c.arg, h = u.value; return h && "object" == _typeof(h) && n.call(h, "__await") ? e.resolve(h.__await).then(function (t) { invoke("next", t, i, a); }, function (t) { invoke("throw", t, i, a); }) : e.resolve(h).then(function (t) { u.value = t, i(u); }, function (t) { return invoke("throw", t, i, a); }); } a(c.arg); } var r; o(this, "_invoke", { value: function value(t, n) { function callInvokeWithMethodAndArg() { return new e(function (e, r) { invoke(t, n, e, r); }); } return r = r ? r.then(callInvokeWithMethodAndArg, callInvokeWithMethodAndArg) : callInvokeWithMethodAndArg(); } }); } function makeInvokeMethod(e, r, n) { var o = h; return function (i, a) { if (o === f) throw new Error("Generator is already running"); if (o === s) { if ("throw" === i) throw a; return { value: t, done: !0 }; } for (n.method = i, n.arg = a;;) { var c = n.delegate; if (c) { var u = maybeInvokeDelegate(c, n); if (u) { if (u === y) continue; return u; } } if ("next" === n.method) n.sent = n._sent = n.arg;else if ("throw" === n.method) { if (o === h) throw o = s, n.arg; n.dispatchException(n.arg); } else "return" === n.method && n.abrupt("return", n.arg); o = f; var p = tryCatch(e, r, n); if ("normal" === p.type) { if (o = n.done ? s : l, p.arg === y) continue; return { value: p.arg, done: n.done }; } "throw" === p.type && (o = s, n.method = "throw", n.arg = p.arg); } }; } function maybeInvokeDelegate(e, r) { var n = r.method, o = e.iterator[n]; if (o === t) return r.delegate = null, "throw" === n && e.iterator.return && (r.method = "return", r.arg = t, maybeInvokeDelegate(e, r), "throw" === r.method) || "return" !== n && (r.method = "throw", r.arg = new TypeError("The iterator does not provide a '" + n + "' method")), y; var i = tryCatch(o, e.iterator, r.arg); if ("throw" === i.type) return r.method = "throw", r.arg = i.arg, r.delegate = null, y; var a = i.arg; return a ? a.done ? (r[e.resultName] = a.value, r.next = e.nextLoc, "return" !== r.method && (r.method = "next", r.arg = t), r.delegate = null, y) : a : (r.method = "throw", r.arg = new TypeError("iterator result is not an object"), r.delegate = null, y); } function pushTryEntry(t) { var e = { tryLoc: t[0] }; 1 in t && (e.catchLoc = t[1]), 2 in t && (e.finallyLoc = t[2], e.afterLoc = t[3]), this.tryEntries.push(e); } function resetTryEntry(t) { var e = t.completion || {}; e.type = "normal", delete e.arg, t.completion = e; } function Context(t) { this.tryEntries = [{ tryLoc: "root" }], t.forEach(pushTryEntry, this), this.reset(!0); } function values(e) { if (e || "" === e) { var r = e[a]; if (r) return r.call(e); if ("function" == typeof e.next) return e; if (!isNaN(e.length)) { var o = -1, i = function next() { for (; ++o < e.length;) if (n.call(e, o)) return next.value = e[o], next.done = !1, next; return next.value = t, next.done = !0, next; }; return i.next = i; } } throw new TypeError(_typeof(e) + " is not iterable"); } return GeneratorFunction.prototype = GeneratorFunctionPrototype, o(g, "constructor", { value: GeneratorFunctionPrototype, configurable: !0 }), o(GeneratorFunctionPrototype, "constructor", { value: GeneratorFunction, configurable: !0 }), GeneratorFunction.displayName = define(GeneratorFunctionPrototype, u, "GeneratorFunction"), e.isGeneratorFunction = function (t) { var e = "function" == typeof t && t.constructor; return !!e && (e === GeneratorFunction || "GeneratorFunction" === (e.displayName || e.name)); }, e.mark = function (t) { return Object.setPrototypeOf ? Object.setPrototypeOf(t, GeneratorFunctionPrototype) : (t.__proto__ = GeneratorFunctionPrototype, define(t, u, "GeneratorFunction")), t.prototype = Object.create(g), t; }, e.awrap = function (t) { return { __await: t }; }, defineIteratorMethods(AsyncIterator.prototype), define(AsyncIterator.prototype, c, function () { return this; }), e.AsyncIterator = AsyncIterator, e.async = function (t, r, n, o, i) { void 0 === i && (i = Promise); var a = new AsyncIterator(wrap(t, r, n, o), i); return e.isGeneratorFunction(r) ? a : a.next().then(function (t) { return t.done ? t.value : a.next(); }); }, defineIteratorMethods(g), define(g, u, "Generator"), define(g, a, function () { return this; }), define(g, "toString", function () { return "[object Generator]"; }), e.keys = function (t) { var e = Object(t), r = []; for (var n in e) r.push(n); return r.reverse(), function next() { for (; r.length;) { var t = r.pop(); if (t in e) return next.value = t, next.done = !1, next; } return next.done = !0, next; }; }, e.values = values, Context.prototype = { constructor: Context, reset: function reset(e) { if (this.prev = 0, this.next = 0, this.sent = this._sent = t, this.done = !1, this.delegate = null, this.method = "next", this.arg = t, this.tryEntries.forEach(resetTryEntry), !e) for (var r in this) "t" === r.charAt(0) && n.call(this, r) && !isNaN(+r.slice(1)) && (this[r] = t); }, stop: function stop() { this.done = !0; var t = this.tryEntries[0].completion; if ("throw" === t.type) throw t.arg; return this.rval; }, dispatchException: function dispatchException(e) { if (this.done) throw e; var r = this; function handle(n, o) { return a.type = "throw", a.arg = e, r.next = n, o && (r.method = "next", r.arg = t), !!o; } for (var o = this.tryEntries.length - 1; o >= 0; --o) { var i = this.tryEntries[o], a = i.completion; if ("root" === i.tryLoc) return handle("end"); if (i.tryLoc <= this.prev) { var c = n.call(i, "catchLoc"), u = n.call(i, "finallyLoc"); if (c && u) { if (this.prev < i.catchLoc) return handle(i.catchLoc, !0); if (this.prev < i.finallyLoc) return handle(i.finallyLoc); } else if (c) { if (this.prev < i.catchLoc) return handle(i.catchLoc, !0); } else { if (!u) throw new Error("try statement without catch or finally"); if (this.prev < i.finallyLoc) return handle(i.finallyLoc); } } } }, abrupt: function abrupt(t, e) { for (var r = this.tryEntries.length - 1; r >= 0; --r) { var o = this.tryEntries[r]; if (o.tryLoc <= this.prev && n.call(o, "finallyLoc") && this.prev < o.finallyLoc) { var i = o; break; } } i && ("break" === t || "continue" === t) && i.tryLoc <= e && e <= i.finallyLoc && (i = null); var a = i ? i.completion : {}; return a.type = t, a.arg = e, i ? (this.method = "next", this.next = i.finallyLoc, y) : this.complete(a); }, complete: function complete(t, e) { if ("throw" === t.type) throw t.arg; return "break" === t.type || "continue" === t.type ? this.next = t.arg : "return" === t.type ? (this.rval = this.arg = t.arg, this.method = "return", this.next = "end") : "normal" === t.type && e && (this.next = e), y; }, finish: function finish(t) { for (var e = this.tryEntries.length - 1; e >= 0; --e) { var r = this.tryEntries[e]; if (r.finallyLoc === t) return this.complete(r.completion, r.afterLoc), resetTryEntry(r), y; } }, catch: function _catch(t) { for (var e = this.tryEntries.length - 1; e >= 0; --e) { var r = this.tryEntries[e]; if (r.tryLoc === t) { var n = r.completion; if ("throw" === n.type) { var o = n.arg; resetTryEntry(r); } return o; } } throw new Error("illegal catch attempt"); }, delegateYield: function delegateYield(e, r, n) { return this.delegate = { iterator: values(e), resultName: r, nextLoc: n }, "next" === this.method && (this.arg = t), y; } }, e; }
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function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) { try { var info = gen[key](arg); var value = info.value; } catch (error) { reject(error); return; } if (info.done) { resolve(value); } else { Promise.resolve(value).then(_next, _throw); } }
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function _asyncToGenerator(fn) { return function () { var self = this, args = arguments; return new Promise(function (resolve, reject) { var gen = fn.apply(self, args); function _next(value) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "next", value); } function _throw(err) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "throw", err); } _next(undefined); }); }; }
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//@ts-nocheck
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import { set, getOuterWidth, getOuterHeight } from 'rc-util/lib/Dom/css';
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import { isNil, isString, isFunction, cloneDeep } from '@zhst/func';
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import { dispatchEvent } from "../utils";
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import { EVENT_VIEWER_TRANSFORM_CHANGE } from "./constants";
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export default {
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// store
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image: null,
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canvas: null,
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containerData: {
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width: 0,
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height: 0
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},
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animationFrame: null,
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backgroundColor: '#fff',
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targetTransform: {
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translateX: 0,
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translateY: 0,
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scale: 0,
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rotate: 0
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// rotate: 90,
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},
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//method
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render: function render() {
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var _this = this;
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return _asyncToGenerator( /*#__PURE__*/_regeneratorRuntime().mark(function _callee() {
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return _regeneratorRuntime().wrap(function _callee$(_context) {
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while (1) switch (_context.prev = _context.next) {
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case 0:
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_context.next = 2;
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return _this.initImg();
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case 2:
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_this.initCanvas();
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_this.startRaf();
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case 4:
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case "end":
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return _context.stop();
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}
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}, _callee);
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}))();
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},
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initImg: function initImg() {
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var _this2 = this;
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return new Promise(function (resolve, reject) {
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var propImage = _this2.options.image;
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if (isString(propImage)) {
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var image = new Image();
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image.crossOrigin = 'anonymous';
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image.src = propImage;
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image.onload = function () {
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_this2.image = image;
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resolve(image);
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};
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image.onerror = function (err) {
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reject(err);
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};
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} else {
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_this2.image = propImage;
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resolve(propImage);
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}
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});
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},
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initCanvas: function initCanvas() {
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//通过样式设置 不依赖父元素的prosition
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var element = this.element,
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canvas = this.canvas,
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_this$limit = this.limit,
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limit = _this$limit === void 0 ? {} : _this$limit,
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options = this.options;
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var containerData = {
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width: getOuterWidth(element),
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height: getOuterHeight(element)
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};
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this.containerData = containerData;
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set(canvas, containerData);
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canvas.width = containerData.width;
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canvas.height = containerData.height;
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var fitTransform = this.calcFitScreen();
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this.targetTransform = Object.assign({}, this.targetTransform, fitTransform);
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dispatchEvent(this.element, EVENT_VIEWER_TRANSFORM_CHANGE, cloneDeep(this.targetTransform));
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//产品需求：fitscale 是 minscale
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var _options$fitScaleAsMi = options.fitScaleAsMinScale,
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fitScaleAsMinScale = _options$fitScaleAsMi === void 0 ? false : _options$fitScaleAsMi;
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if (fitScaleAsMinScale) {
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this.limit = Object.assign({
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minScale: this.targetTransform.scale
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}, this.limit);
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}
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},
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startRaf: function startRaf() {
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var _this3 = this;
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//清理动画
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window.cancelAnimationFrame(this.animationFrame);
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//渲染
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var loop = function loop() {
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// this.update(); //先update
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_this3.renderCanvas();
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window.cancelAnimationFrame(_this3.animationFrame);
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_this3.animationFrame = window.requestAnimationFrame(loop);
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};
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loop();
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},
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// 绘制画布
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renderCanvas: function renderCanvas(_ctx) {
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if (!this.canvas) return;
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var containerData = this.containerData,
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canvas = this.canvas,
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targetTransform = this.targetTransform,
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options = this.options;
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var translateX = targetTransform.translateX,
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translateY = targetTransform.translateY,
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scale = targetTransform.scale,
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rotate = targetTransform.rotate;
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var ctx = _ctx ? _ctx : canvas.getContext('2d');
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//画背景
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ctx.clearRect(0, 0, containerData.width, containerData.height);
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ctx.fillStyle = options.backgroundColor; //todo@wdy OD框背景颜色
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ctx.fillRect(0, 0, canvas.width, canvas.height);
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//画图
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ctx.save();
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//缩放移动
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ctx.setTransform(scale, 0, 0, scale, translateX, translateY);
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// ctx.setTransform(scale, 0, 0, scale, translateX, translateY);
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//旋转
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var centerX = this.image ? this.image.width / 2 : canvas.width;
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var centerY = this.image ? this.image.height / 2 : canvas.height;
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ctx.translate(centerX, centerY);
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ctx.rotate(rotate / 180 * Math.PI);
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ctx.translate(-centerX, -centerY);
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//图片
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this.image && ctx.drawImage(this.image, 0, 0);
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ctx.restore();
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//画图形
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ctx.save();
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this.renderShape(ctx);
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ctx.restore();
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},
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scaleTo: function scaleTo(offsetScale) {
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//获取图片中心点
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var containerData = this.containerData;
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this.calcTransform({
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scaleCenter: {
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x: containerData.width / 2,
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y: containerData.height / 2,
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step: offsetScale
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}
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});
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},
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//暂时只支持90deg旋转 否则limit 不能做
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rotateTo: function rotateTo(T) {
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if (!this.image) return;
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var targetTransform = this.targetTransform;
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var rotate = targetTransform.rotate;
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var newDeg = isFunction(T) ? T(rotate) : T;
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this.calcTransform({
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rotate: newDeg
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});
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},
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reset: function reset() {
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this.targetTransform.rotate = 0;
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var fitTransform = this.calcFitScreen();
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this.targetTransform = Object.assign({}, this.targetTransform, fitTransform);
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dispatchEvent(this.element, EVENT_VIEWER_TRANSFORM_CHANGE, cloneDeep(this.targetTransform));
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},
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getImgSize: function getImgSize() {
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if (!this.image) return;
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return {
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w: this.image.width,
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h: this.image.height
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};
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},
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getImage: function getImage() {
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return this;
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},
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calcFitScreen: function calcFitScreen() {
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if (!this.image) return;
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var w = this.containerData.width;
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var h = this.containerData.height;
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var iw = this.image.width;
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var ih = this.image.height;
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//算图片显示长款 （todo：旋转算旋转后）
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var _this$targetTransform = this.targetTransform.rotate,
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rotate = _this$targetTransform === void 0 ? 0 : _this$targetTransform;
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var wToh = w / h;
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var imgwToh = iw / ih;
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if (rotate % 180 !== 0) {
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imgwToh = ih / iw;
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}
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//计算后的位置
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var scale;
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var translateX = 0;
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var translateY = 0;
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if (imgwToh > wToh) {
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scale = w / iw;
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translateX = 0;
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translateY = (h - ih * scale) / 2;
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if (rotate % 180 !== 0) {
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scale = w / ih;
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translateX = (ih - iw) / 2 * scale;
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translateY = (h - iw * scale) / 2 + (iw - ih) / 2 * scale;
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}
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} else {
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scale = h / ih;
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translateX = (w - iw * scale) / 2;
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translateY = 0;
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if (rotate % 180 !== 0) {
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scale = h / iw;
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translateX = (w - ih * scale) / 2 + (ih - iw) / 2 * scale;
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translateY = (iw - ih) / 2 * scale;
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}
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}
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var fitTransform = {
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translateX: translateX,
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translateY: translateY,
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scale: scale
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};
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return fitTransform;
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},
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calcTransform: function calcTransform(newTransform, cropBox) {
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if (!this.image) return;
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var translateX = newTransform.translateX,
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translateY = newTransform.translateY,
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scaleCenter = newTransform.scaleCenter,
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rotate = newTransform.rotate;
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if (!isNil(scaleCenter)) {
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var _targetTransform = this.targetTransform,
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_this$limit2 = this.limit,
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limit = _this$limit2 === void 0 ? {} : _this$limit2;
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var _limit$minScale = limit.minScale,
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minScale = _limit$minScale === void 0 ? 0.1 : _limit$minScale,
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_limit$maxScale = limit.maxScale,
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maxScale = _limit$maxScale === void 0 ? Number.MAX_VALUE : _limit$maxScale;
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if (cropBox) {
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//如果有cropbox 最小缩放值需要重新计算
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var _this$image = this.image,
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iw = _this$image.width,
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ih = _this$image.height;
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if (_targetTransform.rotate % 180 !== 0) {
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var _ref = [ih, iw];
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iw = _ref[0];
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ih = _ref[1];
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}
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var cw = cropBox.width,
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ch = cropBox.height;
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var corpMinScale = Math.max(cw / iw, ch / ih);
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minScale = Math.max(corpMinScale, minScale);
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}
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var x = scaleCenter.x,
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y = scaleCenter.y,
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step = scaleCenter.step;
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var preScale = _targetTransform.scale;
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var newScale = _targetTransform.scale + step;
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newScale = Math.min(maxScale, Math.max(newScale, minScale));
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var newStep = newScale - preScale;
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if (newScale != preScale) {
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var offsetX = (x - _targetTransform.translateX) / _targetTransform.scale * newStep;
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var offsetY = (y - _targetTransform.translateY) / _targetTransform.scale * newStep;
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this.targetTransform.translateX = this.targetTransform.translateX - offsetX;
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this.targetTransform.translateY = this.targetTransform.translateY - offsetY;
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}
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this.targetTransform.scale = newScale;
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}
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if (!isNil(translateX)) {
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this.targetTransform.translateX += translateX;
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}
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if (!isNil(translateY)) {
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this.targetTransform.translateY += translateY;
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}
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if (!isNil(rotate)) {
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this.targetTransform.rotate = rotate;
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}
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//阻止拖出边界
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var targetTransform = this.targetTransform,
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containerData = this.containerData;
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var minMargin = 50;
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var imgWidth = this.image.width;
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var imgHeight = this.image.height;
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if (this.targetTransform.rotate % 180 !== 0) {
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imgWidth = this.image.height;
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imgHeight = this.image.width;
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}
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var minX = minMargin - imgWidth * targetTransform.scale;
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var maxX = containerData.width - minMargin;
|
||
var minY = minMargin - imgHeight * targetTransform.scale;
|
||
var maxY = containerData.height - minMargin;
|
||
this.targetTransform.translateX = Math.min(maxX, Math.max(this.targetTransform.translateX, minX));
|
||
this.targetTransform.translateY = Math.min(maxY, Math.max(this.targetTransform.translateY, minY));
|
||
|
||
//限制截图框不能超出拖动范围
|
||
if (cropBox) {
|
||
var _cw = cropBox.width,
|
||
_ch = cropBox.height,
|
||
top = cropBox.top,
|
||
left = cropBox.left;
|
||
var _this$image2 = this.image,
|
||
_iw = _this$image2.width,
|
||
_ih = _this$image2.height;
|
||
var imgLeftTop = {
|
||
x: 0,
|
||
y: 0
|
||
};
|
||
var imgRightBottom = {
|
||
x: _iw,
|
||
y: _ih
|
||
};
|
||
if (this.targetTransform.rotate % 180 !== 0) {
|
||
imgLeftTop = {
|
||
x: (_iw - _ih) / 2,
|
||
y: (_ih - _iw) / 2
|
||
};
|
||
imgRightBottom = {
|
||
x: (_iw + _ih) / 2,
|
||
y: (_iw + _ih) / 2
|
||
};
|
||
}
|
||
//图片左上角不能大于crop左上角
|
||
var _maxX = left - imgLeftTop.x * this.targetTransform.scale;
|
||
var _maxY = top - imgLeftTop.y * this.targetTransform.scale;
|
||
//图片右下角不能小于crop 右下角
|
||
var _minX = left + _cw - imgRightBottom.x * this.targetTransform.scale;
|
||
var _minY = top + _ch - imgRightBottom.y * this.targetTransform.scale;
|
||
this.targetTransform.translateX = Math.min(_maxX, Math.max(this.targetTransform.translateX, _minX));
|
||
this.targetTransform.translateY = Math.min(_maxY, Math.max(this.targetTransform.translateY, _minY));
|
||
}
|
||
dispatchEvent(this.element, EVENT_VIEWER_TRANSFORM_CHANGE, cloneDeep(this.targetTransform));
|
||
}
|
||
}; |