svgedit/dist/extensions/ext-eyedropper.js

(function () {
  'use strict';

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

  svgEditor.addExtension('eyedropper', function (S) {
    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));
          }
        }
      }
    };
  });

}());