svgedit/editor/extensions/ext-polygon.js

/* globals jQuery, svgEditor, svgCanvas */
/*
 * ext-polygon.js
 *
 *
 * Copyright(c) 2010 CloudCanvas, Inc.
 * All rights reserved
 *
 */
svgEditor.addExtension('polygon', function (S) {
  const $ = jQuery;
  const // {svgcontent} = S,
    // addElem = S.addSvgElementFromJson,
    editingitex = false;
  let selElems,
    // svgdoc = S.svgroot.parentNode.ownerDocument,
    // newFOG, newFOGParent, newDef, newImageName, newMaskID, modeChangeG,
    // edg = 0,
    // undoCommand = 'Not image';
    started, newFO;

  // const ccZoom;
  // const wEl, hEl;
  // const wOffset, hOffset;
  // const ccRBG;
  // const ccOpacity;
  // const brushW, brushH;

  // const ccDebug = document.getElementById('debugpanel');

  /* const properlySourceSizeTextArea = function(){
   // TODO: remove magic numbers here and get values from CSS
   const height = $('#svg_source_container').height() - 80;
   $('#svg_source_textarea').css('height', height);
   }; */
  function showPanel (on) {
    let fcRules = $('#fc_rules');
    if (!fcRules.length) {
      fcRules = $('<style id="fc_rules"></style>').appendTo('head');
    }
    fcRules.text(!on ? '' : ' #tool_topath { display: none !important; }');
    $('#polygon_panel').toggle(on);
  }

  /*
  function toggleSourceButtons(on){
    $('#tool_source_save, #tool_source_cancel').toggle(!on);
    $('#polygon_save, #polygon_cancel').toggle(on);
  }
  */

  function setAttr (attr, val) {
    svgCanvas.changeSelectedAttribute(attr, val);
    S.call('changed', selElems);
  }

  function cot (n) {
    return 1 / Math.tan(n);
  }

  function sec (n) {
    return 1 / Math.cos(n);
  }

  /**
  * Obtained from http://code.google.com/p/passenger-top/source/browse/instiki/public/svg-edit/editor/extensions/ext-itex.js?r=3
  * This function sets the content of of the currently-selected foreignObject element,
  *   based on the itex contained in string.
  * @param {string} tex The itex text.
  * @returns This function returns false if the set was unsuccessful, true otherwise.
  */
  /*
  function setItexString(tex) {
    const mathns = 'http://www.w3.org/1998/Math/MathML',
      xmlnsns = 'http://www.w3.org/2000/xmlns/',
      ajaxEndpoint = '../../itex';
    const elt = selElems[0];
    try {
      const math = svgdoc.createElementNS(mathns, 'math');
      math.setAttributeNS(xmlnsns, 'xmlns', mathns);
      math.setAttribute('display', 'inline');
      const semantics = document.createElementNS(mathns, 'semantics');
      const annotation = document.createElementNS(mathns, 'annotation');
      annotation.setAttribute('encoding', 'application/x-tex');
      annotation.textContent = tex;
      const mrow = document.createElementNS(mathns, 'mrow');
      semantics.appendChild(mrow);
      semantics.appendChild(annotation);
      math.appendChild(semantics);
      // make an AJAX request to the server, to get the MathML
      $.post(ajaxEndpoint, {tex, 'display': 'inline'}, function(data){
        const children = data.documentElement.childNodes;
        while (children.length > 0) {
           mrow.appendChild(svgdoc.adoptNode(children[0], true));
        }
        S.sanitizeSvg(math);
        S.call('changed', [elt]);
      });
      elt.replaceChild(math, elt.firstChild);
      S.call('changed', [elt]);
      svgCanvas.clearSelection();
    } catch(e) {
      console.log(e);
      return false;
    }

    return true;
  }
  */
  return {
    name: 'polygon',
    svgicons: svgEditor.curConfig.extPath + 'polygon-icons.svg',
    buttons: [{
      id: 'tool_polygon',
      type: 'mode',
      title: 'Polygon Tool',
      position: 11,
      events: {
        click () {
          svgCanvas.setMode('polygon');
          showPanel(true);
        }
      }
    }],

    context_tools: [{
      type: 'input',
      panel: 'polygon_panel',
      title: 'Number of Sides',
      id: 'polySides',
      label: 'sides',
      size: 3,
      defval: 5,
      events: {
        change () {
          setAttr('sides', this.value);
        }
      }
    }],

    callback () {
      $('#polygon_panel').hide();

      const endChanges = function () {
      };

      // TODO: Needs to be done after orig icon loads
      setTimeout(function () {
        // Create source save/cancel buttons
        /* const save = */ $('#tool_source_save').clone().hide().attr('id', 'polygon_save').unbind().appendTo('#tool_source_back').click(function () {
          if (!editingitex) {
            return;
          }
          // Todo: Uncomment the setItexString() function above and handle ajaxEndpoint?
          /*
          if (!setItexString($('#svg_source_textarea').val())) {
            $.confirm('Errors found. Revert to original?', function (ok) {
              if (!ok) {
                return false;
              }
              endChanges();
            });
          } else { */
          endChanges();
          // }
          // setSelectMode();
        });

        /* const cancel = */ $('#tool_source_cancel').clone().hide().attr('id', 'polygon_cancel').unbind().appendTo('#tool_source_back').click(function () {
          endChanges();
        });
      }, 3000);
    },
    mouseDown (opts) {
      // const e = opts.event;
      const rgb = svgCanvas.getColor('fill');
      // const ccRgbEl = rgb.substring(1, rgb.length);
      const sRgb = svgCanvas.getColor('stroke');
      // ccSRgbEl = sRgb.substring(1, rgb.length);
      const sWidth = svgCanvas.getStrokeWidth();

      if (svgCanvas.getMode() === 'polygon') {
        started = true;

        newFO = S.addSvgElementFromJson({
          'element': 'polygon',
          'attr': {
            'cx': opts.start_x,
            'cy': opts.start_y,
            'id': S.getNextId(),
            'shape': 'regularPoly',
            'sides': document.getElementById('polySides').value,
            'orient': 'x',
            'edge': 0,
            'fill': rgb,
            'strokecolor': sRgb,
            'strokeWidth': sWidth
          }
        });

        return {
          started: true
        };
      }
    },
    mouseMove (opts) {
      if (!started) {
        return;
      }
      if (svgCanvas.getMode() === 'polygon') {
        // const e = opts.event;
        const c = $(newFO).attr(['cx', 'cy', 'sides', 'orient', 'fill', 'strokecolor', 'strokeWidth']);
        let x = opts.mouse_x;
        let y = opts.mouse_y;
        const {cx, cy, fill, strokecolor, strokeWidth, sides} = c, // {orient} = c,
          edg = (Math.sqrt((x - cx) * (x - cx) + (y - cy) * (y - cy))) / 1.5;
        newFO.setAttributeNS(null, 'edge', edg);

        const inradius = (edg / 2) * cot(Math.PI / sides);
        const circumradius = inradius * sec(Math.PI / sides);
        let points = '';
        for (let s = 0; sides >= s; s++) {
          const angle = 2.0 * Math.PI * s / sides;
          x = (circumradius * Math.cos(angle)) + cx;
          y = (circumradius * Math.sin(angle)) + cy;

          points += x + ',' + y + ' ';
        }

        // const poly = newFO.createElementNS(NS.SVG, 'polygon');
        newFO.setAttributeNS(null, 'points', points);
        newFO.setAttributeNS(null, 'fill', fill);
        newFO.setAttributeNS(null, 'stroke', strokecolor);
        newFO.setAttributeNS(null, 'stroke-width', strokeWidth);
        // newFO.setAttributeNS(null, 'transform', 'rotate(-90)');
        // const shape = newFO.getAttributeNS(null, 'shape');
        // newFO.appendChild(poly);
        // DrawPoly(cx, cy, sides, edg, orient);
        return {
          started: true
        };
      }
    },

    mouseUp (opts) {
      if (svgCanvas.getMode() === 'polygon') {
        const attrs = $(newFO).attr('edge');
        const keep = (attrs.edge !== '0');
        // svgCanvas.addToSelection([newFO], true);
        return {
          keep,
          element: newFO
        };
      }
    },
    selectedChanged (opts) {
      // Use this to update the current selected elements
      selElems = opts.elems;

      let i = selElems.length;
      while (i--) {
        const elem = selElems[i];
        if (elem && elem.getAttributeNS(null, 'shape') === 'regularPoly') {
          if (opts.selectedElement && !opts.multiselected) {
            $('#polySides').val(elem.getAttribute('sides'));

            showPanel(true);
          } else {
            showPanel(false);
          }
        } else {
          showPanel(false);
        }
      }
    },
    elementChanged (opts) {
      // const elem = opts.elems[0];
    }
  };
});