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

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

import { defer as y, sprint as F } from "./utils/core.mjs";
import z from "./epubcfi.mjs";
import N from "./utils/hook.mjs";
import { replaceBase as I } from "./utils/replacements.mjs";
import O from "./utils/request.mjs";
import { DOMParser as R } from "../../@xmldom/xmldom/lib/index.mjs";
class H {
  constructor(e, t) {
    this.idref = e.idref, this.linear = e.linear === "yes", this.properties = e.properties, this.index = e.index, this.href = e.href, this.url = e.url, this.canonical = e.canonical, this.next = e.next, this.prev = e.prev, this.cfiBase = e.cfiBase, t ? this.hooks = t : (this.hooks = {}, this.hooks.serialize = new N(this), this.hooks.content = new N(this)), this.document = void 0, this.contents = void 0, this.output = void 0;
  }
  /**
   * Load the section from its url
   * @param  {method} [_request] a request method to use for loading
   * @return {document} a promise with the xml document
   */
  load(e) {
    var t = e || this.request || O, o = new y(), n = o.promise;
    return this.contents ? o.resolve(this.contents) : t(this.url).then((function(i) {
      return this.document = i, this.contents = i.documentElement, this.hooks.content.trigger(this.document, this);
    }).bind(this)).then((function() {
      o.resolve(this.contents);
    }).bind(this)).catch(function(i) {
      o.reject(i);
    }), n;
  }
  /**
   * Adds a base tag for resolving urls in the section
   * @private
   */
  base() {
    return I(this.document, this);
  }
  /**
   * Render the contents of a section
   * @param  {method} [_request] a request method to use for loading
   * @return {string} output a serialized XML Document
   */
  render(e) {
    var t = new y(), o = t.promise;
    return this.output, this.load(e).then((function(n) {
      var i = typeof navigator < "u" && navigator.userAgent || "", r = i.indexOf("Trident") >= 0, h;
      typeof XMLSerializer > "u" || r ? h = R : h = XMLSerializer;
      var c = new h();
      return this.output = c.serializeToString(n), this.output;
    }).bind(this)).then((function() {
      return this.hooks.serialize.trigger(this.output, this);
    }).bind(this)).then((function() {
      t.resolve(this.output);
    }).bind(this)).catch(function(n) {
      t.reject(n);
    }), o;
  }
  /**
   * Find a string in a section
   * @param  {string} _query The query string to find
   * @return {object[]} A list of matches, with form {cfi, excerpt}
   */
  find(e) {
    var t = this, o = [], n = e.toLowerCase(), i = function(r) {
      for (var h = r.textContent.toLowerCase(), c = t.document.createRange(), g, s, a = -1, d, v = 150; s != -1; )
        s = h.indexOf(n, a + 1), s != -1 && (c = t.document.createRange(), c.setStart(r, s), c.setEnd(r, s + n.length), g = t.cfiFromRange(c), r.textContent.length < v ? d = r.textContent : (d = r.textContent.substring(s - v / 2, s + v / 2), d = "..." + d + "..."), o.push({
          cfi: g,
          excerpt: d
        })), a = s;
    };
    return F(t.document, function(r) {
      i(r);
    }), o;
  }
  /**
   * Search a string in multiple sequential Element of the section. If the document.createTreeWalker api is missed(eg: IE8), use `find` as a fallback.
   * @param  {string} _query The query string to search
   * @param  {int} maxSeqEle The maximum number of Element that are combined for search, default value is 5.
   * @return {object[]} A list of matches, with form {cfi, excerpt}
   */
  search(e, t = 5) {
    if (typeof document.createTreeWalker > "u")
      return this.find(e);
    let o = [];
    const n = 150, i = this, r = e.toLowerCase(), h = function(a) {
      const u = a.reduce((w, f) => w + f.textContent, "").toLowerCase().indexOf(r);
      if (u != -1) {
        const f = u + r.length;
        let l = 0, k = 0;
        if (u < a[0].length) {
          let b;
          for (; l < a.length - 1 && (k += a[l].length, !(f <= k)); )
            l += 1;
          let E = a[0], B = a[l], x = i.document.createRange();
          x.setStart(E, u);
          let S = a.slice(0, l).reduce((m, C) => m + C.textContent.length, 0);
          x.setEnd(B, S > f ? f : f - S), b = i.cfiFromRange(x);
          let p = a.slice(0, l + 1).reduce((m, C) => m + C.textContent, "");
          p.length > n && (p = p.substring(u - n / 2, u + n / 2), p = "..." + p + "..."), o.push({
            cfi: b,
            excerpt: p
          });
        }
      }
    }, c = document.createTreeWalker(i.document, NodeFilter.SHOW_TEXT, null, !1);
    let g, s = [];
    for (; g = c.nextNode(); )
      s.push(g), s.length == t && (h(s.slice(0, t)), s = s.slice(1, t));
    return s.length > 0 && h(s), o;
  }
  /**
  * Reconciles the current chapters layout properties with
  * the global layout properties.
  * @param {object} globalLayout  The global layout settings object, chapter properties string
  * @return {object} layoutProperties Object with layout properties
  */
  reconcileLayoutSettings(e) {
    var t = {
      layout: e.layout,
      spread: e.spread,
      orientation: e.orientation
    };
    return this.properties.forEach(function(o) {
      var n = o.replace("rendition:", ""), i = n.indexOf("-"), r, h;
      i != -1 && (r = n.slice(0, i), h = n.slice(i + 1), t[r] = h);
    }), t;
  }
  /**
   * Get a CFI from a Range in the Section
   * @param  {range} _range
   * @return {string} cfi an EpubCFI string
   */
  cfiFromRange(e) {
    return new z(e, this.cfiBase).toString();
  }
  /**
   * Get a CFI from an Element in the Section
   * @param  {element} el
   * @return {string} cfi an EpubCFI string
   */
  cfiFromElement(e) {
    return new z(e, this.cfiBase).toString();
  }
  /**
   * Unload the section document
   */
  unload() {
    this.document = void 0, this.contents = void 0, this.output = void 0;
  }
  destroy() {
    this.unload(), this.hooks.serialize.clear(), this.hooks.content.clear(), this.hooks = void 0, this.idref = void 0, this.linear = void 0, this.properties = void 0, this.index = void 0, this.href = void 0, this.url = void 0, this.next = void 0, this.prev = void 0, this.cfiBase = void 0;
  }
}
export {
  H as default
};
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