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node_modules/lottie-web/player/js/elements/helpers/FrameElement.js

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+/**
+ * @file
+ * Handles element's layer frame update.
+ * Checks layer in point and out point
+ *
+ */
+
+function FrameElement() {}
+
+FrameElement.prototype = {
+  /**
+     * @function
+     * Initializes frame related properties.
+     *
+     */
+  initFrame: function () {
+    // set to true when inpoint is rendered
+    this._isFirstFrame = false;
+    // list of animated properties
+    this.dynamicProperties = [];
+    // If layer has been modified in current tick this will be true
+    this._mdf = false;
+  },
+  /**
+     * @function
+     * Calculates all dynamic values
+     *
+     * @param {number} num
+     * current frame number in Layer's time
+     * @param {boolean} isVisible
+     * if layers is currently in range
+     *
+     */
+  prepareProperties: function (num, isVisible) {
+    var i;
+    var len = this.dynamicProperties.length;
+    for (i = 0; i < len; i += 1) {
+      if (isVisible || (this._isParent && this.dynamicProperties[i].propType === 'transform')) {
+        this.dynamicProperties[i].getValue();
+        if (this.dynamicProperties[i]._mdf) {
+          this.globalData._mdf = true;
+          this._mdf = true;
+        }
+      }
+    }
+  },
+  addDynamicProperty: function (prop) {
+    if (this.dynamicProperties.indexOf(prop) === -1) {
+      this.dynamicProperties.push(prop);
+    }
+  },
+};
+
+export default FrameElement;