pdfjs-dist/lib/web/pdf_find_bar.js

/**
 * @licstart The following is the entire license notice for the
 * Javascript code in this page
 *
 * Copyright 2021 Mozilla Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * @licend The above is the entire license notice for the
 * Javascript code in this page
 */
"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.PDFFindBar = void 0;

var _pdf_find_controller = require("./pdf_find_controller.js");

const MATCHES_COUNT_LIMIT = 1000;

class PDFFindBar {
  constructor(options, eventBus, l10n) {
    this.opened = false;
    this.bar = options.bar;
    this.toggleButton = options.toggleButton;
    this.findField = options.findField;
    this.highlightAll = options.highlightAllCheckbox;
    this.caseSensitive = options.caseSensitiveCheckbox;
    this.entireWord = options.entireWordCheckbox;
    this.findMsg = options.findMsg;
    this.findResultsCount = options.findResultsCount;
    this.findPreviousButton = options.findPreviousButton;
    this.findNextButton = options.findNextButton;
    this.eventBus = eventBus;
    this.l10n = l10n;
    this.toggleButton.addEventListener("click", () => {
      this.toggle();
    });
    this.findField.addEventListener("input", () => {
      this.dispatchEvent("");
    });
    this.bar.addEventListener("keydown", e => {
      switch (e.keyCode) {
        case 13:
          if (e.target === this.findField) {
            this.dispatchEvent("again", e.shiftKey);
          }

          break;

        case 27:
          this.close();
          break;
      }
    });
    this.findPreviousButton.addEventListener("click", () => {
      this.dispatchEvent("again", true);
    });
    this.findNextButton.addEventListener("click", () => {
      this.dispatchEvent("again", false);
    });
    this.highlightAll.addEventListener("click", () => {
      this.dispatchEvent("highlightallchange");
    });
    this.caseSensitive.addEventListener("click", () => {
      this.dispatchEvent("casesensitivitychange");
    });
    this.entireWord.addEventListener("click", () => {
      this.dispatchEvent("entirewordchange");
    });

    this.eventBus._on("resize", this._adjustWidth.bind(this));
  }

  reset() {
    this.updateUIState();
  }

  dispatchEvent(type, findPrev) {
    this.eventBus.dispatch("find", {
      source: this,
      type,
      query: this.findField.value,
      phraseSearch: true,
      caseSensitive: this.caseSensitive.checked,
      entireWord: this.entireWord.checked,
      highlightAll: this.highlightAll.checked,
      findPrevious: findPrev
    });
  }

  updateUIState(state, previous, matchesCount) {
    let findMsg = Promise.resolve("");
    let status = "";

    switch (state) {
      case _pdf_find_controller.FindState.FOUND:
        break;

      case _pdf_find_controller.FindState.PENDING:
        status = "pending";
        break;

      case _pdf_find_controller.FindState.NOT_FOUND:
        findMsg = this.l10n.get("find_not_found");
        status = "notFound";
        break;

      case _pdf_find_controller.FindState.WRAPPED:
        findMsg = this.l10n.get(`find_reached_${previous ? "top" : "bottom"}`);
        break;
    }

    this.findField.setAttribute("data-status", status);
    findMsg.then(msg => {
      this.findMsg.textContent = msg;

      this._adjustWidth();
    });
    this.updateResultsCount(matchesCount);
  }

  updateResultsCount({
    current = 0,
    total = 0
  } = {}) {
    const limit = MATCHES_COUNT_LIMIT;
    let matchCountMsg = Promise.resolve("");

    if (total > 0) {
      if (total > limit) {
        let key = "find_match_count_limit";
        matchCountMsg = this.l10n.get(key, {
          limit
        });
      } else {
        let key = "find_match_count";
        matchCountMsg = this.l10n.get(key, {
          current,
          total
        });
      }
    }

    matchCountMsg.then(msg => {
      this.findResultsCount.textContent = msg;
      this.findResultsCount.classList.toggle("hidden", !total);

      this._adjustWidth();
    });
  }

  open() {
    if (!this.opened) {
      this.opened = true;
      this.toggleButton.classList.add("toggled");
      this.toggleButton.setAttribute("aria-expanded", "true");
      this.bar.classList.remove("hidden");
    }

    this.findField.select();
    this.findField.focus();

    this._adjustWidth();
  }

  close() {
    if (!this.opened) {
      return;
    }

    this.opened = false;
    this.toggleButton.classList.remove("toggled");
    this.toggleButton.setAttribute("aria-expanded", "false");
    this.bar.classList.add("hidden");
    this.eventBus.dispatch("findbarclose", {
      source: this
    });
  }

  toggle() {
    if (this.opened) {
      this.close();
    } else {
      this.open();
    }
  }

  _adjustWidth() {
    if (!this.opened) {
      return;
    }

    this.bar.classList.remove("wrapContainers");
    const findbarHeight = this.bar.clientHeight;
    const inputContainerHeight = this.bar.firstElementChild.clientHeight;

    if (findbarHeight > inputContainerHeight) {
      this.bar.classList.add("wrapContainers");
    }
  }

}

exports.PDFFindBar = PDFFindBar;