vue-files-preview-inno/es/node_modules/epubjs/src/mapping.mjs

A tool for previewing files such as doc, excel, pdf, image, markdown, txt, audio, and video and so on.

import d from "./epubcfi.mjs";
import { nodeBounds as v } from "./utils/core.mjs";
class T {
  constructor(e, n, i, a = !1) {
    this.layout = e, this.horizontal = i === "horizontal", this.direction = n || "ltr", this._dev = a;
  }
  /**
   * Find CFI pairs for entire section at once
   */
  section(e) {
    var n = this.findRanges(e), i = this.rangeListToCfiList(e.section.cfiBase, n);
    return i;
  }
  /**
   * Find CFI pairs for a page
   * @param {Contents} contents Contents from view
   * @param {string} cfiBase string of the base for a cfi
   * @param {number} start position to start at
   * @param {number} end position to end at
   */
  page(e, n, i, a) {
    var s = e && e.document ? e.document.body : !1, t;
    if (s) {
      if (t = this.rangePairToCfiPair(n, {
        start: this.findStart(s, i, a),
        end: this.findEnd(s, i, a)
      }), this._dev === !0) {
        let l = e.document, r = new d(t.start).toRange(l), o = new d(t.end).toRange(l), h = l.defaultView.getSelection(), u = l.createRange();
        h.removeAllRanges(), u.setStart(r.startContainer, r.startOffset), u.setEnd(o.endContainer, o.endOffset), h.addRange(u);
      }
      return t;
    }
  }
  /**
   * Walk a node, preforming a function on each node it finds
   * @private
   * @param {Node} root Node to walkToNode
   * @param {function} func walk function
   * @return {*} returns the result of the walk function
   */
  walk(e, n) {
    if (!(e && e.nodeType === Node.TEXT_NODE)) {
      var i = {
        acceptNode: function(r) {
          return r.data.trim().length > 0 ? NodeFilter.FILTER_ACCEPT : NodeFilter.FILTER_REJECT;
        }
      }, a = i.acceptNode;
      a.acceptNode = i.acceptNode;
      for (var s = document.createTreeWalker(e, NodeFilter.SHOW_TEXT, a, !1), t, l; (t = s.nextNode()) && (l = n(t), !l); )
        ;
      return l;
    }
  }
  findRanges(e) {
    for (var n = [], i = e.contents.scrollWidth(), a = Math.ceil(i / this.layout.spreadWidth), s = a * this.layout.divisor, t = this.layout.columnWidth, l = this.layout.gap, r, o, h = 0; h < s.pages; h++)
      r = (t + l) * h, o = t * (h + 1) + l * h, n.push({
        start: this.findStart(e.document.body, r, o),
        end: this.findEnd(e.document.body, r, o)
      });
    return n;
  }
  /**
   * Find Start Range
   * @private
   * @param {Node} root root node
   * @param {number} start position to start at
   * @param {number} end position to end at
   * @return {Range}
   */
  findStart(e, n, i) {
    for (var a = [e], s, t, l = e; a.length; )
      if (s = a.shift(), t = this.walk(s, (r) => {
        var o, h, u, g, f;
        if (f = v(r), this.horizontal && this.direction === "ltr") {
          if (o = this.horizontal ? f.left : f.top, h = this.horizontal ? f.right : f.bottom, o >= n && o <= i)
            return r;
          if (h > n)
            return r;
          l = r, a.push(r);
        } else if (this.horizontal && this.direction === "rtl") {
          if (o = f.left, h = f.right, h <= i && h >= n)
            return r;
          if (o < i)
            return r;
          l = r, a.push(r);
        } else {
          if (u = f.top, g = f.bottom, u >= n && u <= i)
            return r;
          if (g > n)
            return r;
          l = r, a.push(r);
        }
      }), t)
        return this.findTextStartRange(t, n, i);
    return this.findTextStartRange(l, n, i);
  }
  /**
   * Find End Range
   * @private
   * @param {Node} root root node
   * @param {number} start position to start at
   * @param {number} end position to end at
   * @return {Range}
   */
  findEnd(e, n, i) {
    for (var a = [e], s, t = e, l; a.length; )
      if (s = a.shift(), l = this.walk(s, (r) => {
        var o, h, u, g, f;
        if (f = v(r), this.horizontal && this.direction === "ltr") {
          if (o = Math.round(f.left), h = Math.round(f.right), o > i && t)
            return t;
          if (h > i)
            return r;
          t = r, a.push(r);
        } else if (this.horizontal && this.direction === "rtl") {
          if (o = Math.round(this.horizontal ? f.left : f.top), h = Math.round(this.horizontal ? f.right : f.bottom), h < n && t)
            return t;
          if (o < n)
            return r;
          t = r, a.push(r);
        } else {
          if (u = Math.round(f.top), g = Math.round(f.bottom), u > i && t)
            return t;
          if (g > i)
            return r;
          t = r, a.push(r);
        }
      }), l)
        return this.findTextEndRange(l, n, i);
    return this.findTextEndRange(t, n, i);
  }
  /**
   * Find Text Start Range
   * @private
   * @param {Node} root root node
   * @param {number} start position to start at
   * @param {number} end position to end at
   * @return {Range}
   */
  findTextStartRange(e, n, i) {
    for (var a = this.splitTextNodeIntoRanges(e), s, t, l, r, o, h = 0; h < a.length; h++)
      if (s = a[h], t = s.getBoundingClientRect(), this.horizontal && this.direction === "ltr") {
        if (l = t.left, l >= n)
          return s;
      } else if (this.horizontal && this.direction === "rtl") {
        if (o = t.right, o <= i)
          return s;
      } else if (r = t.top, r >= n)
        return s;
    return a[0];
  }
  /**
   * Find Text End Range
   * @private
   * @param {Node} root root node
   * @param {number} start position to start at
   * @param {number} end position to end at
   * @return {Range}
   */
  findTextEndRange(e, n, i) {
    for (var a = this.splitTextNodeIntoRanges(e), s, t, l, r, o, h, u, g = 0; g < a.length; g++) {
      if (t = a[g], l = t.getBoundingClientRect(), this.horizontal && this.direction === "ltr") {
        if (r = l.left, o = l.right, r > i && s)
          return s;
        if (o > i)
          return t;
      } else if (this.horizontal && this.direction === "rtl") {
        if (r = l.left, o = l.right, o < n && s)
          return s;
        if (r < n)
          return t;
      } else {
        if (h = l.top, u = l.bottom, h > i && s)
          return s;
        if (u > i)
          return t;
      }
      s = t;
    }
    return a[a.length - 1];
  }
  /**
   * Split up a text node into ranges for each word
   * @private
   * @param {Node} root root node
   * @param {string} [_splitter] what to split on
   * @return {Range[]}
   */
  splitTextNodeIntoRanges(e, n) {
    var i = [], a = e.textContent || "", s = a.trim(), t, l = e.ownerDocument, r = n || " ", o = s.indexOf(r);
    if (o === -1 || e.nodeType != Node.TEXT_NODE)
      return t = l.createRange(), t.selectNodeContents(e), [t];
    for (t = l.createRange(), t.setStart(e, 0), t.setEnd(e, o), i.push(t), t = !1; o != -1; )
      o = s.indexOf(r, o + 1), o > 0 && (t && (t.setEnd(e, o), i.push(t)), t = l.createRange(), t.setStart(e, o + 1));
    return t && (t.setEnd(e, s.length), i.push(t)), i;
  }
  /**
   * Turn a pair of ranges into a pair of CFIs
   * @private
   * @param {string} cfiBase base string for an EpubCFI
   * @param {object} rangePair { start: Range, end: Range }
   * @return {object} { start: "epubcfi(...)", end: "epubcfi(...)" }
   */
  rangePairToCfiPair(e, n) {
    var i = n.start, a = n.end;
    i.collapse(!0), a.collapse(!1);
    let s = new d(i, e).toString(), t = new d(a, e).toString();
    return {
      start: s,
      end: t
    };
  }
  rangeListToCfiList(e, n) {
    for (var i = [], a, s = 0; s < n.length; s++)
      a = this.rangePairToCfiPair(e, n[s]), i.push(a);
    return i;
  }
  /**
   * Set the axis for mapping
   * @param {string} axis horizontal | vertical
   * @return {boolean} is it horizontal?
   */
  axis(e) {
    return e && (this.horizontal = e === "horizontal"), this.horizontal;
  }
}
export {
  T as default
};
//# sourceMappingURL=mapping.mjs.map