pdfjs-dist/lib/web/pdf_outline_viewer.js

/* Copyright 2017 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.
 */
'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.PDFOutlineViewer = undefined;

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

var _pdfjs = require('./pdfjs');

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

var DEFAULT_TITLE = '\u2013';

var PDFOutlineViewer = function () {
  function PDFOutlineViewer(options) {
    _classCallCheck(this, PDFOutlineViewer);

    this.outline = null;
    this.lastToggleIsShow = true;
    this.container = options.container;
    this.linkService = options.linkService;
    this.eventBus = options.eventBus;
  }

  _createClass(PDFOutlineViewer, [{
    key: 'reset',
    value: function reset() {
      this.outline = null;
      this.lastToggleIsShow = true;
      this.container.textContent = '';
      this.container.classList.remove('outlineWithDeepNesting');
    }
  }, {
    key: '_dispatchEvent',
    value: function _dispatchEvent(outlineCount) {
      this.eventBus.dispatch('outlineloaded', {
        source: this,
        outlineCount: outlineCount
      });
    }
  }, {
    key: '_bindLink',
    value: function _bindLink(element, item) {
      var _this = this;

      if (item.url) {
        (0, _pdfjs.addLinkAttributes)(element, {
          url: item.url,
          target: item.newWindow ? _pdfjs.PDFJS.LinkTarget.BLANK : undefined
        });
        return;
      }
      var destination = item.dest;
      element.href = this.linkService.getDestinationHash(destination);
      element.onclick = function () {
        if (destination) {
          _this.linkService.navigateTo(destination);
        }
        return false;
      };
    }
  }, {
    key: '_setStyles',
    value: function _setStyles(element, item) {
      var styleStr = '';
      if (item.bold) {
        styleStr += 'font-weight: bold;';
      }
      if (item.italic) {
        styleStr += 'font-style: italic;';
      }
      if (styleStr) {
        element.setAttribute('style', styleStr);
      }
    }
  }, {
    key: '_addToggleButton',
    value: function _addToggleButton(div) {
      var _this2 = this;

      var toggler = document.createElement('div');
      toggler.className = 'outlineItemToggler';
      toggler.onclick = function (evt) {
        evt.stopPropagation();
        toggler.classList.toggle('outlineItemsHidden');
        if (evt.shiftKey) {
          var shouldShowAll = !toggler.classList.contains('outlineItemsHidden');
          _this2._toggleOutlineItem(div, shouldShowAll);
        }
      };
      div.insertBefore(toggler, div.firstChild);
    }
  }, {
    key: '_toggleOutlineItem',
    value: function _toggleOutlineItem(root, show) {
      this.lastToggleIsShow = show;
      var togglers = root.querySelectorAll('.outlineItemToggler');
      for (var i = 0, ii = togglers.length; i < ii; ++i) {
        togglers[i].classList[show ? 'remove' : 'add']('outlineItemsHidden');
      }
    }
  }, {
    key: 'toggleOutlineTree',
    value: function toggleOutlineTree() {
      if (!this.outline) {
        return;
      }
      this._toggleOutlineItem(this.container, !this.lastToggleIsShow);
    }
  }, {
    key: 'render',
    value: function render() {
      var params = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};

      var outline = params.outline || null;
      var outlineCount = 0;
      if (this.outline) {
        this.reset();
      }
      this.outline = outline;
      if (!outline) {
        this._dispatchEvent(outlineCount);
        return;
      }
      var fragment = document.createDocumentFragment();
      var queue = [{
        parent: fragment,
        items: this.outline
      }];
      var hasAnyNesting = false;
      while (queue.length > 0) {
        var levelData = queue.shift();
        for (var i = 0, len = levelData.items.length; i < len; i++) {
          var item = levelData.items[i];
          var div = document.createElement('div');
          div.className = 'outlineItem';
          var element = document.createElement('a');
          this._bindLink(element, item);
          this._setStyles(element, item);
          element.textContent = (0, _pdfjs.removeNullCharacters)(item.title) || DEFAULT_TITLE;
          div.appendChild(element);
          if (item.items.length > 0) {
            hasAnyNesting = true;
            this._addToggleButton(div);
            var itemsDiv = document.createElement('div');
            itemsDiv.className = 'outlineItems';
            div.appendChild(itemsDiv);
            queue.push({
              parent: itemsDiv,
              items: item.items
            });
          }
          levelData.parent.appendChild(div);
          outlineCount++;
        }
      }
      if (hasAnyNesting) {
        this.container.classList.add('outlineWithDeepNesting');
      }
      this.container.appendChild(fragment);
      this._dispatchEvent(outlineCount);
    }
  }]);

  return PDFOutlineViewer;
}();

exports.PDFOutlineViewer = PDFOutlineViewer;