# all files / src/js/base/module/ LinkPopover.js

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     import $ from 'jquery';
    import lists from '../core/lists';
    import dom from '../core/dom';

    export default class LinkPopover {
      constructor(context) {
        this.context = context;

        this.ui = $.summernote.ui;
        this.options = context.options;
        this.events = {
          'summernote.keyup summernote.mouseup summernote.change summernote.scroll': () => {
            this.update();
          },
          'summernote.disable summernote.dialog.shown': () => {
            this.hide();
          }
        };
      }

      shouldInitialize() {
        return !lists.isEmpty(this.options.popover.link);
      }

      initialize() {
        this.$popover = this.ui.popover({
          className: 'note-link-popover',
          callback: ($node) => {
            const $content = $node.find('.popover-content,.note-popover-content');
            $content.prepend('<span><a target="_blank"></a>&nbsp;</span>');
          }
        }).render().appendTo(this.options.container);
        const $content = this.$popover.find('.popover-content,.note-popover-content');

        this.context.invoke('buttons.build', $content, this.options.popover.link);
      }

      destroy() {
        this.$popover.remove();
      }

      update() {
        // Prevent focusing on editable when invoke('code') is executed
        if (!this.context.invoke('editor.hasFocus')) {
          this.hide();
          return;
        }

        const rng = this.context.invoke('editor.createRange');
        if (rng.isCollapsed() && rng.isOnAnchor()) {
          const anchor = dom.ancestor(rng.sc, dom.isAnchor);
          const href = $(anchor).attr('href');
          this.$popover.find('a').attr('href', href).html(href);

          const pos = dom.posFromPlaceholder(anchor);
          this.$popover.css({
            display: 'block',
            left: pos.left,
            top: pos.top
          });
        } else {
          this.hide();
        }
      }

      hide() {
        this.$popover.hide();
      }
    }