mirror of
https://github.com/ionic-team/ionic-framework.git
synced 2025-08-22 13:32:54 +08:00
397 lines
10 KiB
TypeScript
397 lines
10 KiB
TypeScript
import { applyStyles, getElementReference, pointerCoordX, pointerCoordY } from '../../util/helpers';
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import { BlockerDelegate } from './gesture-controller';
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import { Component, Ionic, Listen, Prop, Watch } from '../index';
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import { GestureCallback, GestureDetail, GlobalNamespace } from '../../util/interfaces';
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import { GestureController, GestureDelegate, BLOCK_ALL } from './gesture-controller';
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import { PanRecognizer } from './recognizers';
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@Component({
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tag: 'ion-gesture'
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})
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export class Gesture {
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private $el: HTMLElement;
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private ctrl: GestureController;
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private detail: GestureDetail = {};
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private positions: number[] = [];
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private gesture: GestureDelegate;
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private lastTouch = 0;
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private pan: PanRecognizer;
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private hasCapturedPan = false;
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private hasPress = false;
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private hasStartedPan = false;
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private requiresMove = false;
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private isMoveQueued = false;
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private blocker: BlockerDelegate;
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@Prop() attachTo: string = 'child';
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@Prop() autoBlockAll: boolean = false;
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@Prop() block: string = null;
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@Prop() disableScroll: boolean = false;
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@Prop() direction: string = 'x';
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@Prop() gestureName: string = '';
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@Prop() gesturePriority: number = 0;
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@Prop() maxAngle: number = 40;
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@Prop() threshold: number = 20;
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@Prop() type: string = 'pan';
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@Prop() canStart: GestureCallback;
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@Prop() onStart: GestureCallback;
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@Prop() onMove: GestureCallback;
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@Prop() onEnd: GestureCallback;
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@Prop() onPress: GestureCallback;
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@Prop() notCaptured: GestureCallback;
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ionViewDidLoad() {
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this.ctrl = (<GlobalNamespace>Ionic).controllers.gesture = ((<GlobalNamespace>Ionic).controllers.gesture || new GestureController());
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this.gesture = this.ctrl.createGesture(this.gestureName, this.gesturePriority, this.disableScroll);
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const types = this.type.replace(/\s/g, '').toLowerCase().split(',');
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if (types.indexOf('pan') > -1) {
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this.pan = new PanRecognizer(this.direction, this.threshold, this.maxAngle);
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this.requiresMove = true;
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}
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this.hasPress = (types.indexOf('press') > -1);
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if (this.pan || this.hasPress) {
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Ionic.listener.enable(this, 'touchstart', true, this.attachTo);
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Ionic.listener.enable(this, 'mousedown', true, this.attachTo);
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Ionic.dom.write(() => {
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applyStyles(getElementReference(this.$el, this.attachTo), GESTURE_INLINE_STYLES);
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});
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}
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if (this.autoBlockAll) {
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this.blocker = this.ctrl.createBlocker(BLOCK_ALL);
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this.blocker.block();
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}
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}
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@Watch('block')
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blockChange(block: string) {
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if (this.blocker) {
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this.blocker.destroy();
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}
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if (block) {
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this.blocker = this.ctrl.createBlocker(block.split(','));
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}
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}
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// DOWN *************************
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@Listen('touchstart', { passive: true, enabled: false })
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onTouchStart(ev: TouchEvent) {
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this.lastTouch = now(ev);
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this.enableMouse(false);
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this.enableTouch(true);
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this.pointerDown(ev, this.lastTouch);
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}
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@Listen('mousedown', { passive: true, enabled: false })
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onMouseDown(ev: MouseEvent) {
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const timeStamp = now(ev);
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if (this.lastTouch === 0 || (this.lastTouch + MOUSE_WAIT < timeStamp)) {
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this.enableMouse(true);
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this.enableTouch(false);
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this.pointerDown(ev, timeStamp);
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}
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}
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private pointerDown(ev: UIEvent, timeStamp: number): boolean {
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if (!this.gesture || this.hasStartedPan) {
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return false;
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}
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const detail = this.detail;
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detail.startX = detail.currentX = pointerCoordX(ev);
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detail.startY = detail.currentY = pointerCoordY(ev);
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detail.startTimeStamp = detail.timeStamp = timeStamp;
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detail.velocityX = detail.velocityY = detail.deltaX = detail.deltaY = 0;
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detail.directionX = detail.directionY = detail.velocityDirectionX = detail.velocityDirectionY = null;
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detail.event = ev;
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this.positions.length = 0;
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if (this.canStart && this.canStart(detail) === false) {
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return false;
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}
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this.positions.push(detail.currentX, detail.currentY, timeStamp);
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// Release fallback
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this.gesture.release();
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// Start gesture
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if (!this.gesture.start()) {
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return false;
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}
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if (this.pan) {
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this.hasStartedPan = true;
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this.hasCapturedPan = false;
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this.pan.start(detail.startX, detail.startY);
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}
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return true;
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}
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// MOVE *************************
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@Listen('touchmove', { passive: true, enabled: false })
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onTouchMove(ev: TouchEvent) {
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this.lastTouch = this.detail.timeStamp = now(ev);
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this.pointerMove(ev);
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}
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@Listen('document:mousemove', { passive: true, enabled: false })
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onMoveMove(ev: TouchEvent) {
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const timeStamp = now(ev);
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if (this.lastTouch === 0 || (this.lastTouch + MOUSE_WAIT < timeStamp)) {
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this.detail.timeStamp = timeStamp;
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this.pointerMove(ev);
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}
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}
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private pointerMove(ev: UIEvent) {
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const detail = this.detail;
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this.calcGestureData(ev);
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if (this.pan) {
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if (this.hasCapturedPan) {
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if (!this.isMoveQueued) {
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this.isMoveQueued = true;
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Ionic.dom.write(() => {
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this.isMoveQueued = false;
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detail.type = 'pan';
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if (this.onMove) {
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this.onMove(detail);
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} else {
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Ionic.emit(this, 'ionGestureMove', { detail: this.detail });
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}
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});
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}
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} else if (this.pan.detect(detail.currentX, detail.currentY)) {
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if (this.pan.isGesture() !== 0) {
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if (!this.tryToCapturePan(ev)) {
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this.abortGesture();
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}
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}
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}
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}
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}
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private calcGestureData(ev: UIEvent) {
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const detail = this.detail;
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detail.currentX = pointerCoordX(ev);
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detail.currentY = pointerCoordY(ev);
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detail.deltaX = (detail.currentX - detail.startX);
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detail.deltaY = (detail.currentY - detail.startY);
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detail.event = ev;
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// figure out which direction we're movin'
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detail.directionX = detail.velocityDirectionX = (detail.deltaX > 0 ? 'left' : (detail.deltaX < 0 ? 'right' : null));
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detail.directionY = detail.velocityDirectionY = (detail.deltaY > 0 ? 'up' : (detail.deltaY < 0 ? 'down' : null));
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const positions = this.positions;
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positions.push(detail.currentX, detail.currentY, detail.timeStamp);
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var endPos = (positions.length - 1);
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var startPos = endPos;
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var timeRange = (detail.timeStamp - 100);
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// move pointer to position measured 100ms ago
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for (var i = endPos; i > 0 && positions[i] > timeRange; i -= 3) {
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startPos = i;
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}
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if (startPos !== endPos) {
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// compute relative movement between these two points
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var movedX = (positions[startPos - 2] - positions[endPos - 2]);
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var movedY = (positions[startPos - 1] - positions[endPos - 1]);
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var factor = 16.67 / (positions[endPos] - positions[startPos]);
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// based on XXms compute the movement to apply for each render step
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detail.velocityX = movedX * factor;
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detail.velocityY = movedY * factor;
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detail.velocityDirectionX = (movedX > 0 ? 'left' : (movedX < 0 ? 'right' : null));
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detail.velocityDirectionY = (movedY > 0 ? 'up' : (movedY < 0 ? 'down' : null));
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}
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}
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private tryToCapturePan(ev: UIEvent): boolean {
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if (this.gesture && !this.gesture.capture()) {
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return false;
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}
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this.detail.event = ev;
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if (this.onStart) {
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this.onStart(this.detail);
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} else {
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Ionic.emit(this, 'ionGestureStart', { detail: this.detail });
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}
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this.hasCapturedPan = true;
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return true;
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}
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private abortGesture() {
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this.hasStartedPan = false;
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this.hasCapturedPan = false;
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this.gesture && this.gesture.release();
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this.enable(false);
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this.notCaptured && this.notCaptured(this.detail);
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}
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// END *************************
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@Listen('touchend', { passive: true, enabled: false })
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onTouchEnd(ev: TouchEvent) {
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this.lastTouch = this.detail.timeStamp = now(ev);
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this.pointerUp(ev);
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this.enableTouch(false);
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}
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@Listen('document:mouseup', { passive: true, enabled: false })
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onMouseUp(ev: TouchEvent) {
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const timeStamp = now(ev);
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if (this.lastTouch === 0 || (this.lastTouch + MOUSE_WAIT < timeStamp)) {
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this.detail.timeStamp = timeStamp;
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this.pointerUp(ev);
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this.enableMouse(false);
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}
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}
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private pointerUp(ev: UIEvent) {
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const detail = this.detail;
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this.gesture && this.gesture.release();
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detail.event = ev;
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this.calcGestureData(ev);
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if (this.pan) {
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if (this.hasCapturedPan) {
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detail.type = 'pan';
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if (this.onEnd) {
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this.onEnd(detail);
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} else {
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Ionic.emit(this, 'ionGestureEnd', { detail: detail });
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}
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} else if (this.hasPress) {
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this.detectPress();
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} else {
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if (this.notCaptured) {
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this.notCaptured(detail);
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} else {
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Ionic.emit(this, 'ionGestureNotCaptured', { detail: detail });
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}
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}
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} else if (this.hasPress) {
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this.detectPress();
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}
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this.hasCapturedPan = false;
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this.hasStartedPan = false;
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}
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private detectPress() {
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const detail = this.detail;
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if (Math.abs(detail.startX - detail.currentX) < 10 && Math.abs(detail.startY - detail.currentY) < 10) {
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detail.type = 'press';
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if (this.onPress) {
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this.onPress(detail);
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} else {
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Ionic.emit(this, 'ionPress', { detail: detail });
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}
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}
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}
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// ENABLE LISTENERS *************************
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private enableMouse(shouldEnable: boolean) {
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if (this.requiresMove) {
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Ionic.listener.enable(this, 'document:mousemove', shouldEnable);
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}
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Ionic.listener.enable(this, 'document:mouseup', shouldEnable);
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}
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private enableTouch(shouldEnable: boolean) {
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if (this.requiresMove) {
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Ionic.listener.enable(this, 'touchmove', shouldEnable);
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}
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Ionic.listener.enable(this, 'touchend', shouldEnable);
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}
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private enable(shouldEnable: boolean) {
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this.enableMouse(shouldEnable);
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this.enableTouch(shouldEnable);
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}
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ionViewDidUnload() {
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if (this.blocker) {
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this.blocker.destroy();
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this.blocker = null;
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}
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this.gesture && this.gesture.destroy();
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this.ctrl = this.gesture = this.pan = this.detail = this.detail.event = null;
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}
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}
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const GESTURE_INLINE_STYLES = {
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'touch-action': 'none',
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'user-select': 'none',
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'-webkit-user-drag': 'none',
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'-webkit-tap-highlight-color': 'rgba(0,0,0,0)'
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};
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const MOUSE_WAIT = 2500;
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function now(ev: UIEvent) {
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return ev.timeStamp || Date.now();
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}
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