var svgEditorExtension_eyedropper = (function () {
  'use strict';

  /* globals jQuery */
  /*
   * ext-eyedropper.js
   *
   * Licensed under the MIT License
   *
   * Copyright(c) 2010 Jeff Schiller
   *
   */

  var extEyedropper = {
    name: 'eyedropper',
    init: function init(S) {
      var svgEditor = this;
      var $ = jQuery;
      var ChangeElementCommand = S.ChangeElementCommand,
          svgCanvas = svgEditor.canvas,
          addToHistory = function addToHistory(cmd) {
        svgCanvas.undoMgr.addCommandToHistory(cmd);
      },
          currentStyle = {
        fillPaint: 'red', fillOpacity: 1.0,
        strokePaint: 'black', strokeOpacity: 1.0,
        strokeWidth: 5, strokeDashArray: null,
        opacity: 1.0,
        strokeLinecap: 'butt',
        strokeLinejoin: 'miter'
      };

      function getStyle(opts) {
        // if we are in eyedropper mode, we don't want to disable the eye-dropper tool
        var mode = svgCanvas.getMode();
        if (mode === 'eyedropper') {
          return;
        }

        var tool = $('#tool_eyedropper');
        // enable-eye-dropper if one element is selected
        var elem = null;
        if (!opts.multiselected && opts.elems[0] && !['svg', 'g', 'use'].includes(opts.elems[0].nodeName)) {
          elem = opts.elems[0];
          tool.removeClass('disabled');
          // grab the current style
          currentStyle.fillPaint = elem.getAttribute('fill') || 'black';
          currentStyle.fillOpacity = elem.getAttribute('fill-opacity') || 1.0;
          currentStyle.strokePaint = elem.getAttribute('stroke');
          currentStyle.strokeOpacity = elem.getAttribute('stroke-opacity') || 1.0;
          currentStyle.strokeWidth = elem.getAttribute('stroke-width');
          currentStyle.strokeDashArray = elem.getAttribute('stroke-dasharray');
          currentStyle.strokeLinecap = elem.getAttribute('stroke-linecap');
          currentStyle.strokeLinejoin = elem.getAttribute('stroke-linejoin');
          currentStyle.opacity = elem.getAttribute('opacity') || 1.0;
          // disable eye-dropper tool
        } else {
          tool.addClass('disabled');
        }
      }

      return {
        name: 'eyedropper',
        svgicons: svgEditor.curConfig.extIconsPath + 'eyedropper-icon.xml',
        buttons: [{
          id: 'tool_eyedropper',
          type: 'mode',
          title: 'Eye Dropper Tool',
          key: 'I',
          events: {
            click: function click() {
              svgCanvas.setMode('eyedropper');
            }
          }
        }],

        // if we have selected an element, grab its paint and enable the eye dropper button
        selectedChanged: getStyle,
        elementChanged: getStyle,

        mouseDown: function mouseDown(opts) {
          var mode = svgCanvas.getMode();
          if (mode === 'eyedropper') {
            var e = opts.event;
            var target = e.target;

            if (!['svg', 'g', 'use'].includes(target.nodeName)) {
              var changes = {};

              var change = function change(elem, attrname, newvalue) {
                changes[attrname] = elem.getAttribute(attrname);
                elem.setAttribute(attrname, newvalue);
              };

              if (currentStyle.fillPaint) {
                change(target, 'fill', currentStyle.fillPaint);
              }
              if (currentStyle.fillOpacity) {
                change(target, 'fill-opacity', currentStyle.fillOpacity);
              }
              if (currentStyle.strokePaint) {
                change(target, 'stroke', currentStyle.strokePaint);
              }
              if (currentStyle.strokeOpacity) {
                change(target, 'stroke-opacity', currentStyle.strokeOpacity);
              }
              if (currentStyle.strokeWidth) {
                change(target, 'stroke-width', currentStyle.strokeWidth);
              }
              if (currentStyle.strokeDashArray) {
                change(target, 'stroke-dasharray', currentStyle.strokeDashArray);
              }
              if (currentStyle.opacity) {
                change(target, 'opacity', currentStyle.opacity);
              }
              if (currentStyle.strokeLinecap) {
                change(target, 'stroke-linecap', currentStyle.strokeLinecap);
              }
              if (currentStyle.strokeLinejoin) {
                change(target, 'stroke-linejoin', currentStyle.strokeLinejoin);
              }

              addToHistory(new ChangeElementCommand(target, changes));
            }
          }
        }
      };
    }
  };

  return extEyedropper;

}());