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File: Label.js
/**
 * Label.js
 *
 * Released under LGPL License.
 * Copyright (c) 1999-2017 Ephox Corp. All rights reserved
 *
 * License: http://www.tinymce.com/license
 * Contributing: http://www.tinymce.com/contributing
 */

/**
 * This class creates a label element. A label is a simple text control
 * that can be bound to other controls.
 *
 * @-x-less Label.less
 * @class tinymce.ui.Label
 * @extends tinymce.ui.Widget
 */
define(
  'tinymce.core.ui.Label',
  [
    "tinymce.core.ui.Widget",
    "tinymce.core.ui.DomUtils"
  ],
  function (Widget, DomUtils) {
    "use strict";

    return Widget.extend({
      /**
       * Constructs a instance with the specified settings.
       *
       * @constructor
       * @param {Object} settings Name/value object with settings.
       * @setting {Boolean} multiline Multiline label.
       */
      init: function (settings) {
        var self = this;

        self._super(settings);
        self.classes.add('widget').add('label');
        self.canFocus = false;

        if (settings.multiline) {
          self.classes.add('autoscroll');
        }

        if (settings.strong) {
          self.classes.add('strong');
        }
      },

      /**
       * Initializes the current controls layout rect.
       * This will be executed by the layout managers to determine the
       * default minWidth/minHeight etc.
       *
       * @method initLayoutRect
       * @return {Object} Layout rect instance.
       */
      initLayoutRect: function () {
        var self = this, layoutRect = self._super();

        if (self.settings.multiline) {
          var size = DomUtils.getSize(self.getEl());

          // Check if the text fits within maxW if not then try word wrapping it
          if (size.width > layoutRect.maxW) {
            layoutRect.minW = layoutRect.maxW;
            self.classes.add('multiline');
          }

          self.getEl().style.width = layoutRect.minW + 'px';
          layoutRect.startMinH = layoutRect.h = layoutRect.minH = Math.min(layoutRect.maxH, DomUtils.getSize(self.getEl()).height);
        }

        return layoutRect;
      },

      /**
       * Repaints the control after a layout operation.
       *
       * @method repaint
       */
      repaint: function () {
        var self = this;

        if (!self.settings.multiline) {
          self.getEl().style.lineHeight = self.layoutRect().h + 'px';
        }

        return self._super();
      },

      severity: function (level) {
        this.classes.remove('error');
        this.classes.remove('warning');
        this.classes.remove('success');
        this.classes.add(level);
      },

      /**
       * Renders the control as a HTML string.
       *
       * @method renderHtml
       * @return {String} HTML representing the control.
       */
      renderHtml: function () {
        var self = this, targetCtrl, forName, forId = self.settings.forId;
        var text = self.settings.html ? self.settings.html : self.encode(self.state.get('text'));

        if (!forId && (forName = self.settings.forName)) {
          targetCtrl = self.getRoot().find('#' + forName)[0];

          if (targetCtrl) {
            forId = targetCtrl._id;
          }
        }

        if (forId) {
          return (
            '<label id="' + self._id + '" class="' + self.classes + '"' + (forId ? ' for="' + forId + '"' : '') + '>' +
            text +
            '</label>'
          );
        }

        return (
          '<span id="' + self._id + '" class="' + self.classes + '">' +
          text +
          '</span>'
        );
      },

      bindStates: function () {
        var self = this;

        self.state.on('change:text', function (e) {
          self.innerHtml(self.encode(e.value));

          if (self.state.get('rendered')) {
            self.updateLayoutRect();
          }
        });

        return self._super();
      }
    });
  }
);