/*!
 * (C) Ionic http://ionicframework.com - MIT License
 */
import { proxyCustomElement, HTMLElement, createEvent, readTask, forceUpdate, h, Host } from '@stencil/core/internal/client';
import { b as getIonMode, a as isPlatform } from './ionic-global.js';
import { c as componentOnReady } from './helpers.js';
import { i as isRTL } from './dir.js';
import { c as createColorClasses, h as hostContext } from './theme.js';

const contentCss = ":host{--background:var(--ion-background-color, #fff);--color:var(--ion-text-color, #000);--padding-top:0px;--padding-bottom:0px;--padding-start:0px;--padding-end:0px;--keyboard-offset:0px;--offset-top:0px;--offset-bottom:0px;--overflow:auto;display:block;position:relative;-ms-flex:1;flex:1;width:100%;height:100%;margin:0 !important;padding:0 !important;font-family:var(--ion-font-family, inherit);contain:size style}:host(.ion-color) .inner-scroll{background:var(--ion-color-base);color:var(--ion-color-contrast)}:host(.outer-content){--background:var(--ion-color-step-50, #f2f2f2)}#background-content{left:0px;right:0px;top:calc(var(--offset-top) * -1);bottom:calc(var(--offset-bottom) * -1);position:absolute;background:var(--background)}.inner-scroll{left:0px;right:0px;top:calc(var(--offset-top) * -1);bottom:calc(var(--offset-bottom) * -1);padding-left:var(--padding-start);padding-right:var(--padding-end);padding-top:calc(var(--padding-top) + var(--offset-top));padding-bottom:calc(var(--padding-bottom) + var(--keyboard-offset) + var(--offset-bottom));position:absolute;color:var(--color);-webkit-box-sizing:border-box;box-sizing:border-box;overflow:hidden;-ms-touch-action:pan-x pan-y pinch-zoom;touch-action:pan-x pan-y pinch-zoom}@supports ((-webkit-margin-start: 0) or (margin-inline-start: 0)) or (-webkit-margin-start: 0){.inner-scroll{padding-left:unset;padding-right:unset;-webkit-padding-start:var(--padding-start);padding-inline-start:var(--padding-start);-webkit-padding-end:var(--padding-end);padding-inline-end:var(--padding-end)}}.scroll-y,.scroll-x{-webkit-overflow-scrolling:touch;z-index:0;will-change:scroll-position}.scroll-y{overflow-y:var(--overflow);overscroll-behavior-y:contain}.scroll-x{overflow-x:var(--overflow);overscroll-behavior-x:contain}.overscroll::before,.overscroll::after{position:absolute;width:1px;height:1px;content:\"\"}.overscroll::before{bottom:-1px}.overscroll::after{top:-1px}:host(.content-sizing){display:-ms-flexbox;display:flex;-ms-flex-direction:column;flex-direction:column;min-height:0;contain:none}:host(.content-sizing) .inner-scroll{position:relative;top:0;bottom:0;margin-top:calc(var(--offset-top) * -1);margin-bottom:calc(var(--offset-bottom) * -1)}.transition-effect{display:none;position:absolute;width:100%;height:100vh;opacity:0;pointer-events:none}:host(.content-ltr) .transition-effect{left:-100%;}:host(.content-rtl) .transition-effect{right:-100%;}.transition-cover{position:absolute;right:0;width:100%;height:100%;background:black;opacity:0.1}.transition-shadow{display:block;position:absolute;width:10px;height:100%;background-image:url(data:image/png;base64,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);background-repeat:repeat-y;background-size:10px 16px}:host(.content-ltr) .transition-shadow{right:0;}:host(.content-rtl) .transition-shadow{left:0;-webkit-transform:scaleX(-1);transform:scaleX(-1)}::slotted([slot=fixed]){position:absolute;-webkit-transform:translateZ(0);transform:translateZ(0)}";

const Content = /*@__PURE__*/ proxyCustomElement(class extends HTMLElement {
  constructor() {
    super();
    this.__registerHost();
    this.__attachShadow();
    this.ionScrollStart = createEvent(this, "ionScrollStart", 7);
    this.ionScroll = createEvent(this, "ionScroll", 7);
    this.ionScrollEnd = createEvent(this, "ionScrollEnd", 7);
    this.watchDog = null;
    this.isScrolling = false;
    this.lastScroll = 0;
    this.queued = false;
    this.cTop = -1;
    this.cBottom = -1;
    this.isMainContent = true;
    this.resizeTimeout = null;
    // Detail is used in a hot loop in the scroll event, by allocating it here
    // V8 will be able to inline any read/write to it since it's a monomorphic class.
    // https://mrale.ph/blog/2015/01/11/whats-up-with-monomorphism.html
    this.detail = {
      scrollTop: 0,
      scrollLeft: 0,
      type: 'scroll',
      event: undefined,
      startX: 0,
      startY: 0,
      startTime: 0,
      currentX: 0,
      currentY: 0,
      velocityX: 0,
      velocityY: 0,
      deltaX: 0,
      deltaY: 0,
      currentTime: 0,
      data: undefined,
      isScrolling: true,
    };
    /**
     * If `true`, the content will scroll behind the headers
     * and footers. This effect can easily be seen by setting the toolbar
     * to transparent.
     */
    this.fullscreen = false;
    /**
     * If you want to enable the content scrolling in the X axis, set this property to `true`.
     */
    this.scrollX = false;
    /**
     * If you want to disable the content scrolling in the Y axis, set this property to `false`.
     */
    this.scrollY = true;
    /**
     * Because of performance reasons, ionScroll events are disabled by default, in order to enable them
     * and start listening from (ionScroll), set this property to `true`.
     */
    this.scrollEvents = false;
  }
  connectedCallback() {
    this.isMainContent = this.el.closest('ion-menu, ion-popover, ion-modal') === null;
  }
  disconnectedCallback() {
    this.onScrollEnd();
  }
  onAppLoad() {
    this.resize();
  }
  /**
   * Rotating certain devices can update
   * the safe area insets. As a result,
   * the fullscreen feature on ion-content
   * needs to be recalculated.
   *
   * We listen for "resize" because we
   * do not care what the orientation of
   * the device is. Other APIs
   * such as ScreenOrientation or
   * the deviceorientation event must have
   * permission from the user first whereas
   * the "resize" event does not.
   *
   * We also throttle the callback to minimize
   * thrashing when quickly resizing a window.
   */
  onResize() {
    if (this.resizeTimeout) {
      clearTimeout(this.resizeTimeout);
      this.resizeTimeout = null;
    }
    this.resizeTimeout = setTimeout(() => {
      /**
       * Resize should only happen
       * if the content is visible.
       * When the content is hidden
       * then offsetParent will be null.
       */
      if (this.el.offsetParent === null) {
        return;
      }
      this.resize();
    }, 100);
  }
  shouldForceOverscroll() {
    const { forceOverscroll } = this;
    const mode = getIonMode(this);
    return forceOverscroll === undefined ? mode === 'ios' && isPlatform('ios') : forceOverscroll;
  }
  resize() {
    if (this.fullscreen) {
      readTask(() => this.readDimensions());
    }
    else if (this.cTop !== 0 || this.cBottom !== 0) {
      this.cTop = this.cBottom = 0;
      forceUpdate(this);
    }
  }
  readDimensions() {
    const page = getPageElement(this.el);
    const top = Math.max(this.el.offsetTop, 0);
    const bottom = Math.max(page.offsetHeight - top - this.el.offsetHeight, 0);
    const dirty = top !== this.cTop || bottom !== this.cBottom;
    if (dirty) {
      this.cTop = top;
      this.cBottom = bottom;
      forceUpdate(this);
    }
  }
  onScroll(ev) {
    const timeStamp = Date.now();
    const shouldStart = !this.isScrolling;
    this.lastScroll = timeStamp;
    if (shouldStart) {
      this.onScrollStart();
    }
    if (!this.queued && this.scrollEvents) {
      this.queued = true;
      readTask((ts) => {
        this.queued = false;
        this.detail.event = ev;
        updateScrollDetail(this.detail, this.scrollEl, ts, shouldStart);
        this.ionScroll.emit(this.detail);
      });
    }
  }
  /**
   * Get the element where the actual scrolling takes place.
   * This element can be used to subscribe to `scroll` events or manually modify
   * `scrollTop`. However, it's recommended to use the API provided by `ion-content`:
   *
   * i.e. Using `ionScroll`, `ionScrollStart`, `ionScrollEnd` for scrolling events
   * and `scrollToPoint()` to scroll the content into a certain point.
   */
  async getScrollElement() {
    /**
     * If this gets called in certain early lifecycle hooks (ex: Vue onMounted),
     * scrollEl won't be defined yet with the custom elements build, so wait for it to load in.
     */
    if (!this.scrollEl) {
      await new Promise((resolve) => componentOnReady(this.el, resolve));
    }
    return Promise.resolve(this.scrollEl);
  }
  /**
   * Returns the background content element.
   * @internal
   */
  async getBackgroundElement() {
    if (!this.backgroundContentEl) {
      await new Promise((resolve) => componentOnReady(this.el, resolve));
    }
    return Promise.resolve(this.backgroundContentEl);
  }
  /**
   * Scroll to the top of the component.
   *
   * @param duration The amount of time to take scrolling to the top. Defaults to `0`.
   */
  scrollToTop(duration = 0) {
    return this.scrollToPoint(undefined, 0, duration);
  }
  /**
   * Scroll to the bottom of the component.
   *
   * @param duration The amount of time to take scrolling to the bottom. Defaults to `0`.
   */
  async scrollToBottom(duration = 0) {
    const scrollEl = await this.getScrollElement();
    const y = scrollEl.scrollHeight - scrollEl.clientHeight;
    return this.scrollToPoint(undefined, y, duration);
  }
  /**
   * Scroll by a specified X/Y distance in the component.
   *
   * @param x The amount to scroll by on the horizontal axis.
   * @param y The amount to scroll by on the vertical axis.
   * @param duration The amount of time to take scrolling by that amount.
   */
  async scrollByPoint(x, y, duration) {
    const scrollEl = await this.getScrollElement();
    return this.scrollToPoint(x + scrollEl.scrollLeft, y + scrollEl.scrollTop, duration);
  }
  /**
   * Scroll to a specified X/Y location in the component.
   *
   * @param x The point to scroll to on the horizontal axis.
   * @param y The point to scroll to on the vertical axis.
   * @param duration The amount of time to take scrolling to that point. Defaults to `0`.
   */
  async scrollToPoint(x, y, duration = 0) {
    const el = await this.getScrollElement();
    if (duration < 32) {
      if (y != null) {
        el.scrollTop = y;
      }
      if (x != null) {
        el.scrollLeft = x;
      }
      return;
    }
    let resolve;
    let startTime = 0;
    const promise = new Promise((r) => (resolve = r));
    const fromY = el.scrollTop;
    const fromX = el.scrollLeft;
    const deltaY = y != null ? y - fromY : 0;
    const deltaX = x != null ? x - fromX : 0;
    // scroll loop
    const step = (timeStamp) => {
      const linearTime = Math.min(1, (timeStamp - startTime) / duration) - 1;
      const easedT = Math.pow(linearTime, 3) + 1;
      if (deltaY !== 0) {
        el.scrollTop = Math.floor(easedT * deltaY + fromY);
      }
      if (deltaX !== 0) {
        el.scrollLeft = Math.floor(easedT * deltaX + fromX);
      }
      if (easedT < 1) {
        // do not use DomController here
        // must use nativeRaf in order to fire in the next frame
        requestAnimationFrame(step);
      }
      else {
        resolve();
      }
    };
    // chill out for a frame first
    requestAnimationFrame((ts) => {
      startTime = ts;
      step(ts);
    });
    return promise;
  }
  onScrollStart() {
    this.isScrolling = true;
    this.ionScrollStart.emit({
      isScrolling: true,
    });
    if (this.watchDog) {
      clearInterval(this.watchDog);
    }
    // watchdog
    this.watchDog = setInterval(() => {
      if (this.lastScroll < Date.now() - 120) {
        this.onScrollEnd();
      }
    }, 100);
  }
  onScrollEnd() {
    if (this.watchDog)
      clearInterval(this.watchDog);
    this.watchDog = null;
    if (this.isScrolling) {
      this.isScrolling = false;
      this.ionScrollEnd.emit({
        isScrolling: false,
      });
    }
  }
  render() {
    const { isMainContent, scrollX, scrollY, el } = this;
    const rtl = isRTL(el) ? 'rtl' : 'ltr';
    const mode = getIonMode(this);
    const forceOverscroll = this.shouldForceOverscroll();
    const transitionShadow = mode === 'ios';
    const TagType = isMainContent ? 'main' : 'div';
    this.resize();
    return (h(Host, { class: createColorClasses(this.color, {
        [mode]: true,
        'content-sizing': hostContext('ion-popover', this.el),
        overscroll: forceOverscroll,
        [`content-${rtl}`]: true,
      }), style: {
        '--offset-top': `${this.cTop}px`,
        '--offset-bottom': `${this.cBottom}px`,
      } }, h("div", { ref: (el) => (this.backgroundContentEl = el), id: "background-content", part: "background" }), h(TagType, { class: {
        'inner-scroll': true,
        'scroll-x': scrollX,
        'scroll-y': scrollY,
        overscroll: (scrollX || scrollY) && forceOverscroll,
      }, ref: (scrollEl) => (this.scrollEl = scrollEl), onScroll: this.scrollEvents ? (ev) => this.onScroll(ev) : undefined, part: "scroll" }, h("slot", null)), transitionShadow ? (h("div", { class: "transition-effect" }, h("div", { class: "transition-cover" }), h("div", { class: "transition-shadow" }))) : null, h("slot", { name: "fixed" })));
  }
  get el() { return this; }
  static get style() { return contentCss; }
}, [1, "ion-content", {
    "color": [513],
    "fullscreen": [4],
    "forceOverscroll": [1028, "force-overscroll"],
    "scrollX": [4, "scroll-x"],
    "scrollY": [4, "scroll-y"],
    "scrollEvents": [4, "scroll-events"],
    "getScrollElement": [64],
    "getBackgroundElement": [64],
    "scrollToTop": [64],
    "scrollToBottom": [64],
    "scrollByPoint": [64],
    "scrollToPoint": [64]
  }, [[8, "appload", "onAppLoad"], [9, "resize", "onResize"]]]);
const getParentElement = (el) => {
  var _a;
  if (el.parentElement) {
    // normal element with a parent element
    return el.parentElement;
  }
  if ((_a = el.parentNode) === null || _a === void 0 ? void 0 : _a.host) {
    // shadow dom's document fragment
    return el.parentNode.host;
  }
  return null;
};
const getPageElement = (el) => {
  const tabs = el.closest('ion-tabs');
  if (tabs) {
    return tabs;
  }
  /**
   * If we're in a popover, we need to use its wrapper so we can account for space
   * between the popover and the edges of the screen. But if the popover contains
   * its own page element, we should use that instead.
   */
  const page = el.closest('ion-app, ion-page, .ion-page, page-inner, .popover-content');
  if (page) {
    return page;
  }
  return getParentElement(el);
};
// ******** DOM READ ****************
const updateScrollDetail = (detail, el, timestamp, shouldStart) => {
  const prevX = detail.currentX;
  const prevY = detail.currentY;
  const prevT = detail.currentTime;
  const currentX = el.scrollLeft;
  const currentY = el.scrollTop;
  const timeDelta = timestamp - prevT;
  if (shouldStart) {
    // remember the start positions
    detail.startTime = timestamp;
    detail.startX = currentX;
    detail.startY = currentY;
    detail.velocityX = detail.velocityY = 0;
  }
  detail.currentTime = timestamp;
  detail.currentX = detail.scrollLeft = currentX;
  detail.currentY = detail.scrollTop = currentY;
  detail.deltaX = currentX - detail.startX;
  detail.deltaY = currentY - detail.startY;
  if (timeDelta > 0 && timeDelta < 100) {
    const velocityX = (currentX - prevX) / timeDelta;
    const velocityY = (currentY - prevY) / timeDelta;
    detail.velocityX = velocityX * 0.7 + detail.velocityX * 0.3;
    detail.velocityY = velocityY * 0.7 + detail.velocityY * 0.3;
  }
};
function defineCustomElement$1() {
  if (typeof customElements === "undefined") {
    return;
  }
  const components = ["ion-content"];
  components.forEach(tagName => { switch (tagName) {
    case "ion-content":
      if (!customElements.get(tagName)) {
        customElements.define(tagName, Content);
      }
      break;
  } });
}

const IonContent = Content;
const defineCustomElement = defineCustomElement$1;

export { IonContent, defineCustomElement };