player/js/mask.js

import { getLocationHref } from './main';
import {
  createElementID,
} from './utils/common';
import {
  createSizedArray,
} from './utils/helpers/arrays';
import PropertyFactory from './utils/PropertyFactory';
import ShapePropertyFactory from './utils/shapes/ShapeProperty';
import createNS from './utils/helpers/svg_elements';

function MaskElement(data, element, globalData) {
  this.data = data;
  this.element = element;
  this.globalData = globalData;
  this.storedData = [];
  this.masksProperties = this.data.masksProperties || [];
  this.maskElement = null;
  var defs = this.globalData.defs;
  var i;
  var len = this.masksProperties ? this.masksProperties.length : 0;
  this.viewData = createSizedArray(len);
  this.solidPath = '';

  var path;
  var properties = this.masksProperties;
  var count = 0;
  var currentMasks = [];
  var j;
  var jLen;
  var layerId = createElementID();
  var rect;
  var expansor;
  var feMorph;
  var x;
  var maskType = 'clipPath';
  var maskRef = 'clip-path';
  for (i = 0; i < len; i += 1) {
    if ((properties[i].mode !== 'a' && properties[i].mode !== 'n') || properties[i].inv || properties[i].o.k !== 100 || properties[i].o.x) {
      maskType = 'mask';
      maskRef = 'mask';
    }

    if ((properties[i].mode === 's' || properties[i].mode === 'i') && count === 0) {
      rect = createNS('rect');
      rect.setAttribute('fill', '#ffffff');
      rect.setAttribute('width', this.element.comp.data.w || 0);
      rect.setAttribute('height', this.element.comp.data.h || 0);
      currentMasks.push(rect);
    } else {
      rect = null;
    }

    path = createNS('path');
    if (properties[i].mode === 'n') {
      // TODO move this to a factory or to a constructor
      this.viewData[i] = {
        op: PropertyFactory.getProp(this.element, properties[i].o, 0, 0.01, this.element),
        prop: ShapePropertyFactory.getShapeProp(this.element, properties[i], 3),
        elem: path,
        lastPath: '',
      };
      defs.appendChild(path);
    } else {
      count += 1;

      path.setAttribute('fill', properties[i].mode === 's' ? '#000000' : '#ffffff');
      path.setAttribute('clip-rule', 'nonzero');
      var filterID;

      if (properties[i].x.k !== 0) {
        maskType = 'mask';
        maskRef = 'mask';
        x = PropertyFactory.getProp(this.element, properties[i].x, 0, null, this.element);
        filterID = createElementID();
        expansor = createNS('filter');
        expansor.setAttribute('id', filterID);
        feMorph = createNS('feMorphology');
        feMorph.setAttribute('operator', 'erode');
        feMorph.setAttribute('in', 'SourceGraphic');
        feMorph.setAttribute('radius', '0');
        expansor.appendChild(feMorph);
        defs.appendChild(expansor);
        path.setAttribute('stroke', properties[i].mode === 's' ? '#000000' : '#ffffff');
      } else {
        feMorph = null;
        x = null;
      }

      // TODO move this to a factory or to a constructor
      this.storedData[i] = {
        elem: path,
        x: x,
        expan: feMorph,
        lastPath: '',
        lastOperator: '',
        filterId: filterID,
        lastRadius: 0,
      };
      if (properties[i].mode === 'i') {
        jLen = currentMasks.length;
        var g = createNS('g');
        for (j = 0; j < jLen; j += 1) {
          g.appendChild(currentMasks[j]);
        }
        var mask = createNS('mask');
        mask.setAttribute('mask-type', 'alpha');
        mask.setAttribute('id', layerId + '_' + count);
        mask.appendChild(path);
        defs.appendChild(mask);
        g.setAttribute('mask', 'url(' + getLocationHref() + '#' + layerId + '_' + count + ')');

        currentMasks.length = 0;
        currentMasks.push(g);
      } else {
        currentMasks.push(path);
      }
      if (properties[i].inv && !this.solidPath) {
        this.solidPath = this.createLayerSolidPath();
      }
      // TODO move this to a factory or to a constructor
      this.viewData[i] = {
        elem: path,
        lastPath: '',
        op: PropertyFactory.getProp(this.element, properties[i].o, 0, 0.01, this.element),
        prop: ShapePropertyFactory.getShapeProp(this.element, properties[i], 3),
        invRect: rect,
      };
      if (!this.viewData[i].prop.k) {
        this.drawPath(properties[i], this.viewData[i].prop.v, this.viewData[i]);
      }
    }
  }

  this.maskElement = createNS(maskType);

  len = currentMasks.length;
  for (i = 0; i < len; i += 1) {
    this.maskElement.appendChild(currentMasks[i]);
  }

  if (count > 0) {
    this.maskElement.setAttribute('id', layerId);
    this.element.maskedElement.setAttribute(maskRef, 'url(' + getLocationHref() + '#' + layerId + ')');
    defs.appendChild(this.maskElement);
  }
  if (this.viewData.length) {
    this.element.addRenderableComponent(this);
  }
}

MaskElement.prototype.getMaskProperty = function (pos) {
  return this.viewData[pos].prop;
};

MaskElement.prototype.renderFrame = function (isFirstFrame) {
  var finalMat = this.element.finalTransform.mat;
  var i;
  var len = this.masksProperties.length;
  for (i = 0; i < len; i += 1) {
    if (this.viewData[i].prop._mdf || isFirstFrame) {
      this.drawPath(this.masksProperties[i], this.viewData[i].prop.v, this.viewData[i]);
    }
    if (this.viewData[i].op._mdf || isFirstFrame) {
      this.viewData[i].elem.setAttribute('fill-opacity', this.viewData[i].op.v);
    }
    if (this.masksProperties[i].mode !== 'n') {
      if (this.viewData[i].invRect && (this.element.finalTransform.mProp._mdf || isFirstFrame)) {
        this.viewData[i].invRect.setAttribute('transform', finalMat.getInverseMatrix().to2dCSS());
      }
      if (this.storedData[i].x && (this.storedData[i].x._mdf || isFirstFrame)) {
        var feMorph = this.storedData[i].expan;
        if (this.storedData[i].x.v < 0) {
          if (this.storedData[i].lastOperator !== 'erode') {
            this.storedData[i].lastOperator = 'erode';
            this.storedData[i].elem.setAttribute('filter', 'url(' + getLocationHref() + '#' + this.storedData[i].filterId + ')');
          }
          feMorph.setAttribute('radius', -this.storedData[i].x.v);
        } else {
          if (this.storedData[i].lastOperator !== 'dilate') {
            this.storedData[i].lastOperator = 'dilate';
            this.storedData[i].elem.setAttribute('filter', null);
          }
          this.storedData[i].elem.setAttribute('stroke-width', this.storedData[i].x.v * 2);
        }
      }
    }
  }
};

MaskElement.prototype.getMaskelement = function () {
  return this.maskElement;
};

MaskElement.prototype.createLayerSolidPath = function () {
  var path = 'M0,0 ';
  path += ' h' + this.globalData.compSize.w;
  path += ' v' + this.globalData.compSize.h;
  path += ' h-' + this.globalData.compSize.w;
  path += ' v-' + this.globalData.compSize.h + ' ';
  return path;
};

MaskElement.prototype.drawPath = function (pathData, pathNodes, viewData) {
  var pathString = ' M' + pathNodes.v[0][0] + ',' + pathNodes.v[0][1];
  var i;
  var len;
  len = pathNodes._length;
  for (i = 1; i < len; i += 1) {
    // pathString += " C"+pathNodes.o[i-1][0]+','+pathNodes.o[i-1][1] + " "+pathNodes.i[i][0]+','+pathNodes.i[i][1] + " "+pathNodes.v[i][0]+','+pathNodes.v[i][1];
    pathString += ' C' + pathNodes.o[i - 1][0] + ',' + pathNodes.o[i - 1][1] + ' ' + pathNodes.i[i][0] + ',' + pathNodes.i[i][1] + ' ' + pathNodes.v[i][0] + ',' + pathNodes.v[i][1];
  }
  // pathString += " C"+pathNodes.o[i-1][0]+','+pathNodes.o[i-1][1] + " "+pathNodes.i[0][0]+','+pathNodes.i[0][1] + " "+pathNodes.v[0][0]+','+pathNodes.v[0][1];
  if (pathNodes.c && len > 1) {
    pathString += ' C' + pathNodes.o[i - 1][0] + ',' + pathNodes.o[i - 1][1] + ' ' + pathNodes.i[0][0] + ',' + pathNodes.i[0][1] + ' ' + pathNodes.v[0][0] + ',' + pathNodes.v[0][1];
  }
  // pathNodes.__renderedString = pathString;

  if (viewData.lastPath !== pathString) {
    var pathShapeValue = '';
    if (viewData.elem) {
      if (pathNodes.c) {
        pathShapeValue = pathData.inv ? this.solidPath + pathString : pathString;
      }
      viewData.elem.setAttribute('d', pathShapeValue);
    }
    viewData.lastPath = pathString;
  }
};

MaskElement.prototype.destroy = function () {
  this.element = null;
  this.globalData = null;
  this.maskElement = null;
  this.data = null;
  this.masksProperties = null;
};

export default MaskElement;