| import * as util from './core/util'; | 
| import * as vec2 from './core/vector'; | 
| import Draggable from './mixin/Draggable'; | 
| import Eventful from './core/Eventful'; | 
| import * as eventTool from './core/event'; | 
| import {GestureMgr} from './core/GestureMgr'; | 
| import Displayable from './graphic/Displayable'; | 
| import {PainterBase} from './PainterBase'; | 
| import HandlerDomProxy, { HandlerProxyInterface } from './dom/HandlerProxy'; | 
| import { ZRRawEvent, ZRPinchEvent, ElementEventName, ElementEventNameWithOn, ZRRawTouchEvent } from './core/types'; | 
| import Storage from './Storage'; | 
| import Element, {ElementEvent} from './Element'; | 
| import CanvasPainter from './canvas/Painter'; | 
| import BoundingRect from './core/BoundingRect'; | 
|   | 
| /** | 
|  * [The interface between `Handler` and `HandlerProxy`]: | 
|  * | 
|  * The default `HandlerProxy` only support the common standard web environment | 
|  * (e.g., standalone browser, headless browser, embed browser in mobild APP, ...). | 
|  * But `HandlerProxy` can be replaced to support more non-standard environment | 
|  * (e.g., mini app), or to support more feature that the default `HandlerProxy` | 
|  * not provided (like echarts-gl did). | 
|  * So the interface between `Handler` and `HandlerProxy` should be stable. Do not | 
|  * make break changes util inevitable. The interface include the public methods | 
|  * of `Handler` and the events listed in `handlerNames` below, by which `HandlerProxy` | 
|  * drives `Handler`. | 
|  */ | 
|   | 
| /** | 
|  * [DRAG_OUTSIDE]: | 
|  * | 
|  * That is, triggering `mousemove` and `mouseup` event when the pointer is out of the | 
|  * zrender area when dragging. That is important for the improvement of the user experience | 
|  * when dragging something near the boundary without being terminated unexpectedly. | 
|  * | 
|  * We originally consider to introduce new events like `pagemovemove` and `pagemouseup` | 
|  * to resolve this issue. But some drawbacks of it is described in | 
|  * https://github.com/ecomfe/zrender/pull/536#issuecomment-560286899 | 
|  * | 
|  * Instead, we referenced the specifications: | 
|  * https://www.w3.org/TR/touch-events/#the-touchmove-event | 
|  * https://www.w3.org/TR/2014/WD-DOM-Level-3-Events-20140925/#event-type-mousemove | 
|  * where the the mousemove/touchmove can be continue to fire if the user began a drag | 
|  * operation and the pointer has left the boundary. (for the mouse event, browsers | 
|  * only do it on `document` and when the pointer has left the boundary of the browser.) | 
|  * | 
|  * So the default `HandlerProxy` supports this feature similarly: if it is in the dragging | 
|  * state (see `pointerCapture` in `HandlerProxy`), the `mousemove` and `mouseup` continue | 
|  * to fire until release the pointer. That is implemented by listen to those event on | 
|  * `document`. | 
|  * If we implement some other `HandlerProxy` only for touch device, that would be easier. | 
|  * The touch event support this feature by default. | 
|  * The term "pointer capture" is from the spec: | 
|  * https://www.w3.org/TR/pointerevents2/#idl-def-element-setpointercapture-pointerid | 
|  * | 
|  * Note: | 
|  * There might be some cases that the mouse event can not be received on `document`. | 
|  * For example, | 
|  * (A) When `useCapture` is not supported and some user defined event listeners on the ancestor | 
|  * of zr dom throw Error. | 
|  * (B) When `useCapture` is not supported and some user defined event listeners on the ancestor of | 
|  * zr dom call `stopPropagation`. | 
|  * In these cases, the `mousemove` event might be keep triggering event when the mouse is released. | 
|  * We try to reduce the side-effect in those cases, that is, use `isOutsideBoundary` to prevent | 
|  * it from do anything (especially, `findHover`). | 
|  * (`useCapture` mean, `addEvnetListener(listener, {capture: true})`, althought it may not be | 
|  * suppported in some environments.) | 
|  * | 
|  * Note: | 
|  * If `HandlerProxy` listens to `document` with `useCapture`, `HandlerProxy` needs to | 
|  * prevent user-registered-handler from calling `stopPropagation` and `preventDefault` | 
|  * when the `event.target` is not a zrender dom element. Otherwise the user-registered-handler | 
|  * may be able to prevent other elements (that not relevant to zrender) in the web page from receiving | 
|  * dom events. | 
|  */ | 
|   | 
| const SILENT = 'silent'; | 
|   | 
| function makeEventPacket(eveType: ElementEventName, targetInfo: { | 
|     target?: Element | 
|     topTarget?: Element | 
| }, event: ZRRawEvent): ElementEvent { | 
|     return { | 
|         type: eveType, | 
|         event: event, | 
|         // target can only be an element that is not silent. | 
|         target: targetInfo.target, | 
|         // topTarget can be a silent element. | 
|         topTarget: targetInfo.topTarget, | 
|         cancelBubble: false, | 
|         offsetX: event.zrX, | 
|         offsetY: event.zrY, | 
|         gestureEvent: (event as ZRPinchEvent).gestureEvent, | 
|         pinchX: (event as ZRPinchEvent).pinchX, | 
|         pinchY: (event as ZRPinchEvent).pinchY, | 
|         pinchScale: (event as ZRPinchEvent).pinchScale, | 
|         wheelDelta: event.zrDelta, | 
|         zrByTouch: event.zrByTouch, | 
|         which: event.which, | 
|         stop: stopEvent | 
|     }; | 
| } | 
|   | 
| function stopEvent(this: ElementEvent) { | 
|     eventTool.stop(this.event); | 
| } | 
|   | 
| class EmptyProxy extends Eventful { | 
|     handler: Handler = null | 
|     dispose() {} | 
|     setCursor() {} | 
| } | 
|   | 
| class HoveredResult { | 
|     x: number | 
|     y: number | 
|     target: Displayable | 
|     topTarget: Displayable | 
|     constructor(x?: number, y?: number) { | 
|         this.x = x; | 
|         this.y = y; | 
|     } | 
| } | 
|   | 
| const handlerNames = [ | 
|     'click', 'dblclick', 'mousewheel', 'mouseout', | 
|     'mouseup', 'mousedown', 'mousemove', 'contextmenu' | 
| ]; | 
|   | 
| type HandlerName = 'click' |'dblclick' |'mousewheel' |'mouseout' | | 
|     'mouseup' |'mousedown' |'mousemove' |'contextmenu'; | 
|   | 
| const tmpRect = new BoundingRect(0, 0, 0, 0); | 
|   | 
| // TODO draggable | 
| class Handler extends Eventful { | 
|   | 
|     storage: Storage | 
|     painter: PainterBase | 
|     painterRoot: HTMLElement | 
|   | 
|     proxy: HandlerProxyInterface | 
|   | 
|     private _hovered = new HoveredResult(0, 0) | 
|   | 
|     private _gestureMgr: GestureMgr | 
|   | 
|     private _draggingMgr: Draggable | 
|   | 
|     private _pointerSize: number | 
|   | 
|     _downEl: Element | 
|     _upEl: Element | 
|     _downPoint: [number, number] | 
|   | 
|     constructor( | 
|         storage: Storage, | 
|         painter: PainterBase, | 
|         proxy: HandlerProxyInterface, | 
|         painterRoot: HTMLElement, | 
|         pointerSize: number | 
|     ) { | 
|         super(); | 
|   | 
|         this.storage = storage; | 
|   | 
|         this.painter = painter; | 
|   | 
|         this.painterRoot = painterRoot; | 
|   | 
|         this._pointerSize = pointerSize; | 
|   | 
|         proxy = proxy || new EmptyProxy(); | 
|   | 
|         /** | 
|          * Proxy of event. can be Dom, WebGLSurface, etc. | 
|          */ | 
|         this.proxy = null; | 
|   | 
|         this.setHandlerProxy(proxy); | 
|   | 
|         this._draggingMgr = new Draggable(this); | 
|     } | 
|   | 
|     setHandlerProxy(proxy: HandlerProxyInterface) { | 
|         if (this.proxy) { | 
|             this.proxy.dispose(); | 
|         } | 
|   | 
|         if (proxy) { | 
|             util.each(handlerNames, function (name) { | 
|                 proxy.on && proxy.on(name, this[name as HandlerName], this); | 
|             }, this); | 
|             // Attach handler | 
|             proxy.handler = this; | 
|         } | 
|         this.proxy = proxy; | 
|     } | 
|   | 
|     mousemove(event: ZRRawEvent) { | 
|         const x = event.zrX; | 
|         const y = event.zrY; | 
|   | 
|         const isOutside = isOutsideBoundary(this, x, y); | 
|   | 
|         let lastHovered = this._hovered; | 
|         let lastHoveredTarget = lastHovered.target; | 
|   | 
|         // If lastHoveredTarget is removed from zr (detected by '__zr') by some API call | 
|         // (like 'setOption' or 'dispatchAction') in event handlers, we should find | 
|         // lastHovered again here. Otherwise 'mouseout' can not be triggered normally. | 
|         // See #6198. | 
|         if (lastHoveredTarget && !lastHoveredTarget.__zr) { | 
|             lastHovered = this.findHover(lastHovered.x, lastHovered.y); | 
|             lastHoveredTarget = lastHovered.target; | 
|         } | 
|   | 
|         const hovered = this._hovered = isOutside ? new HoveredResult(x, y) : this.findHover(x, y); | 
|         const hoveredTarget = hovered.target; | 
|   | 
|         const proxy = this.proxy; | 
|         proxy.setCursor && proxy.setCursor(hoveredTarget ? hoveredTarget.cursor : 'default'); | 
|   | 
|         // Mouse out on previous hovered element | 
|         if (lastHoveredTarget && hoveredTarget !== lastHoveredTarget) { | 
|             this.dispatchToElement(lastHovered, 'mouseout', event); | 
|         } | 
|   | 
|         // Mouse moving on one element | 
|         this.dispatchToElement(hovered, 'mousemove', event); | 
|   | 
|         // Mouse over on a new element | 
|         if (hoveredTarget && hoveredTarget !== lastHoveredTarget) { | 
|             this.dispatchToElement(hovered, 'mouseover', event); | 
|         } | 
|     } | 
|   | 
|     mouseout(event: ZRRawEvent) { | 
|         const eventControl = event.zrEventControl; | 
|   | 
|         if (eventControl !== 'only_globalout') { | 
|             this.dispatchToElement(this._hovered, 'mouseout', event); | 
|         } | 
|   | 
|         if (eventControl !== 'no_globalout') { | 
|             // FIXME: if the pointer moving from the extra doms to realy "outside", | 
|             // the `globalout` should have been triggered. But currently not. | 
|             this.trigger('globalout', {type: 'globalout', event: event}); | 
|         } | 
|     } | 
|   | 
|     /** | 
|      * Resize | 
|      */ | 
|     resize() { | 
|         this._hovered = new HoveredResult(0, 0); | 
|     } | 
|   | 
|     /** | 
|      * Dispatch event | 
|      */ | 
|     dispatch(eventName: HandlerName, eventArgs?: any) { | 
|         const handler = this[eventName]; | 
|         handler && handler.call(this, eventArgs); | 
|     } | 
|   | 
|     /** | 
|      * Dispose | 
|      */ | 
|     dispose() { | 
|   | 
|         this.proxy.dispose(); | 
|   | 
|         this.storage = null; | 
|         this.proxy = null; | 
|         this.painter = null; | 
|     } | 
|   | 
|     /** | 
|      * 设置默认的cursor style | 
|      * @param cursorStyle 例如 crosshair,默认为 'default' | 
|      */ | 
|     setCursorStyle(cursorStyle: string) { | 
|         const proxy = this.proxy; | 
|         proxy.setCursor && proxy.setCursor(cursorStyle); | 
|     } | 
|   | 
|     /** | 
|      * 事件分发代理 | 
|      * | 
|      * @private | 
|      * @param {Object} targetInfo {target, topTarget} 目标图形元素 | 
|      * @param {string} eventName 事件名称 | 
|      * @param {Object} event 事件对象 | 
|      */ | 
|     dispatchToElement(targetInfo: { | 
|         target?: Element | 
|         topTarget?: Element | 
|     }, eventName: ElementEventName, event: ZRRawEvent) { | 
|   | 
|         targetInfo = targetInfo || {}; | 
|   | 
|         let el = targetInfo.target as Element; | 
|         if (el && el.silent) { | 
|             return; | 
|         } | 
|         const eventKey = ('on' + eventName) as ElementEventNameWithOn; | 
|         const eventPacket = makeEventPacket(eventName, targetInfo, event); | 
|   | 
|         while (el) { | 
|             el[eventKey] | 
|                 && (eventPacket.cancelBubble = !!el[eventKey].call(el, eventPacket)); | 
|   | 
|             el.trigger(eventName, eventPacket); | 
|   | 
|             // Bubble to the host if on the textContent. | 
|             // PENDING | 
|             el = el.__hostTarget ? el.__hostTarget : el.parent; | 
|   | 
|             if (eventPacket.cancelBubble) { | 
|                 break; | 
|             } | 
|         } | 
|   | 
|         if (!eventPacket.cancelBubble) { | 
|             // 冒泡到顶级 zrender 对象 | 
|             this.trigger(eventName, eventPacket); | 
|             // 分发事件到用户自定义层 | 
|             // 用户有可能在全局 click 事件中 dispose,所以需要判断下 painter 是否存在 | 
|             if (this.painter && (this.painter as CanvasPainter).eachOtherLayer) { | 
|                 (this.painter as CanvasPainter).eachOtherLayer(function (layer) { | 
|                     if (typeof (layer[eventKey]) === 'function') { | 
|                         layer[eventKey].call(layer, eventPacket); | 
|                     } | 
|                     if (layer.trigger) { | 
|                         layer.trigger(eventName, eventPacket); | 
|                     } | 
|                 }); | 
|             } | 
|         } | 
|     } | 
|   | 
|     findHover(x: number, y: number, exclude?: Displayable): HoveredResult { | 
|         const list = this.storage.getDisplayList(); | 
|         const out = new HoveredResult(x, y); | 
|         setHoverTarget(list, out, x, y, exclude); | 
|   | 
|         if (this._pointerSize && !out.target) { | 
|             /** | 
|              * If no element at pointer position, check intersection with | 
|              * elements with pointer enlarged by target size. | 
|              */ | 
|             const candidates: Displayable[] = []; | 
|             const pointerSize = this._pointerSize; | 
|             const targetSizeHalf = pointerSize / 2; | 
|             const pointerRect = new BoundingRect(x - targetSizeHalf, y - targetSizeHalf, pointerSize, pointerSize); | 
|   | 
|             for (let i = list.length - 1; i >= 0; i--) { | 
|                 const el = list[i]; | 
|                 if (el !== exclude | 
|                     && !el.ignore | 
|                     && !el.ignoreCoarsePointer | 
|                     // If an element ignores, its textContent should also ignore. | 
|                     // TSpan's parent is not a Group but a ZRText. | 
|                     // See Text.js _getOrCreateChild | 
|                     && (!el.parent || !(el.parent as any).ignoreCoarsePointer) | 
|                 ) { | 
|                     tmpRect.copy(el.getBoundingRect()); | 
|                     if (el.transform) { | 
|                         tmpRect.applyTransform(el.transform); | 
|                     } | 
|                     if (tmpRect.intersect(pointerRect)) { | 
|                         candidates.push(el); | 
|                     } | 
|                 } | 
|             } | 
|   | 
|             /** | 
|              * If there are elements whose bounding boxes are near the pointer, | 
|              * use the most top one that intersects with the enlarged pointer. | 
|              */ | 
|             if (candidates.length) { | 
|                 const rStep = 4; | 
|                 const thetaStep = Math.PI / 12; | 
|                 const PI2 = Math.PI * 2; | 
|                 for (let r = 0; r < targetSizeHalf; r += rStep) { | 
|                     for (let theta = 0; theta < PI2; theta += thetaStep) { | 
|                         const x1 = x + r * Math.cos(theta); | 
|                         const y1 = y + r * Math.sin(theta); | 
|                         setHoverTarget(candidates, out, x1, y1, exclude); | 
|                         if (out.target) { | 
|                             return out; | 
|                         } | 
|                     } | 
|                 } | 
|             } | 
|         } | 
|   | 
|         return out; | 
|     } | 
|   | 
|     processGesture(event: ZRRawEvent, stage?: 'start' | 'end' | 'change') { | 
|         if (!this._gestureMgr) { | 
|             this._gestureMgr = new GestureMgr(); | 
|         } | 
|         const gestureMgr = this._gestureMgr; | 
|   | 
|         stage === 'start' && gestureMgr.clear(); | 
|   | 
|         const gestureInfo = gestureMgr.recognize( | 
|             event as ZRRawTouchEvent, | 
|             this.findHover(event.zrX, event.zrY, null).target, | 
|             (this.proxy as HandlerDomProxy).dom | 
|         ); | 
|   | 
|         stage === 'end' && gestureMgr.clear(); | 
|   | 
|         // Do not do any preventDefault here. Upper application do that if necessary. | 
|         if (gestureInfo) { | 
|             const type = gestureInfo.type; | 
|             (event as ZRPinchEvent).gestureEvent = type; | 
|   | 
|             let res = new HoveredResult(); | 
|             res.target = gestureInfo.target; | 
|             this.dispatchToElement(res, type as ElementEventName, gestureInfo.event as ZRRawEvent); | 
|         } | 
|     } | 
|   | 
|     click: (event: ZRRawEvent) => void | 
|     mousedown: (event: ZRRawEvent) => void | 
|     mouseup: (event: ZRRawEvent) => void | 
|     mousewheel: (event: ZRRawEvent) => void | 
|     dblclick: (event: ZRRawEvent) => void | 
|     contextmenu: (event: ZRRawEvent) => void | 
| } | 
|   | 
| // Common handlers | 
| util.each(['click', 'mousedown', 'mouseup', 'mousewheel', 'dblclick', 'contextmenu'], function (name: HandlerName) { | 
|     Handler.prototype[name] = function (event) { | 
|         const x = event.zrX; | 
|         const y = event.zrY; | 
|         const isOutside = isOutsideBoundary(this, x, y); | 
|   | 
|         let hovered; | 
|         let hoveredTarget; | 
|   | 
|         if (name !== 'mouseup' || !isOutside) { | 
|             // Find hover again to avoid click event is dispatched manually. Or click is triggered without mouseover | 
|             hovered = this.findHover(x, y); | 
|             hoveredTarget = hovered.target; | 
|         } | 
|   | 
|         if (name === 'mousedown') { | 
|             this._downEl = hoveredTarget; | 
|             this._downPoint = [event.zrX, event.zrY]; | 
|             // In case click triggered before mouseup | 
|             this._upEl = hoveredTarget; | 
|         } | 
|         else if (name === 'mouseup') { | 
|             this._upEl = hoveredTarget; | 
|         } | 
|         else if (name === 'click') { | 
|             if (this._downEl !== this._upEl | 
|                 // Original click event is triggered on the whole canvas element, | 
|                 // including the case that `mousedown` - `mousemove` - `mouseup`, | 
|                 // which should be filtered, otherwise it will bring trouble to | 
|                 // pan and zoom. | 
|                 || !this._downPoint | 
|                 // Arbitrary value | 
|                 || vec2.dist(this._downPoint, [event.zrX, event.zrY]) > 4 | 
|             ) { | 
|                 return; | 
|             } | 
|             this._downPoint = null; | 
|         } | 
|   | 
|         this.dispatchToElement(hovered, name, event); | 
|     }; | 
| }); | 
|   | 
| function isHover(displayable: Displayable, x: number, y: number) { | 
|     if (displayable[displayable.rectHover ? 'rectContain' : 'contain'](x, y)) { | 
|         let el: Element = displayable; | 
|         let isSilent; | 
|         let ignoreClip = false; | 
|         while (el) { | 
|             // Ignore clip on any ancestors. | 
|             if (el.ignoreClip) { | 
|                 ignoreClip = true; | 
|             } | 
|             if (!ignoreClip) { | 
|                 let clipPath = el.getClipPath(); | 
|                 // If clipped by ancestor. | 
|                 // FIXME: If clipPath has neither stroke nor fill, | 
|                 // el.clipPath.contain(x, y) will always return false. | 
|                 if (clipPath && !clipPath.contain(x, y)) { | 
|                     return false; | 
|                 } | 
|             } | 
|             if (el.silent) { | 
|                 isSilent = true; | 
|             } | 
|             // Consider when el is textContent, also need to be silent | 
|             // if any of its host el and its ancestors is silent. | 
|             const hostEl = el.__hostTarget; | 
|             el = hostEl ? hostEl : el.parent; | 
|         } | 
|         return isSilent ? SILENT : true; | 
|     } | 
|   | 
|     return false; | 
| } | 
|   | 
| function setHoverTarget( | 
|     list: Displayable[], | 
|     out: HoveredResult, | 
|     x: number, | 
|     y: number, | 
|     exclude: Displayable | 
| ) { | 
|     for (let i = list.length - 1; i >= 0; i--) { | 
|         const el = list[i]; | 
|         let hoverCheckResult; | 
|         if (el !== exclude | 
|             // getDisplayList may include ignored item in VML mode | 
|             && !el.ignore | 
|             && (hoverCheckResult = isHover(el, x, y)) | 
|         ) { | 
|             !out.topTarget && (out.topTarget = el); | 
|             if (hoverCheckResult !== SILENT) { | 
|                 out.target = el; | 
|                 break; | 
|             } | 
|         } | 
|     } | 
| } | 
|   | 
| /** | 
|  * See [DRAG_OUTSIDE]. | 
|  */ | 
| function isOutsideBoundary(handlerInstance: Handler, x: number, y: number) { | 
|     const painter = handlerInstance.painter; | 
|     return x < 0 || x > painter.getWidth() || y < 0 || y > painter.getHeight(); | 
| } | 
|   | 
| export default Handler; |