split project with app & doric module

doric-Qt/example/doric/yoga/Utils.h

@@ -0,0 +1,147 @@
+/*
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#pragma once
+#include "YGNode.h"
+#include "Yoga-internal.h"
+#include "CompactValue.h"
+
+// This struct is an helper model to hold the data for step 4 of flexbox algo,
+// which is collecting the flex items in a line.
+//
+// - itemsOnLine: Number of items which can fit in a line considering the
+//   available Inner dimension, the flex items computed flexbasis and their
+//   margin. It may be different than the difference between start and end
+//   indicates because we skip over absolute-positioned items.
+//
+// - sizeConsumedOnCurrentLine: It is accumulation of the dimensions and margin
+//   of all the children on the current line. This will be used in order to
+//   either set the dimensions of the node if none already exist or to compute
+//   the remaining space left for the flexible children.
+//
+// - totalFlexGrowFactors: total flex grow factors of flex items which are to be
+//   layed in the current line
+//
+// - totalFlexShrinkFactors: total flex shrink factors of flex items which are
+//   to be layed in the current line
+//
+// - endOfLineIndex: Its the end index of the last flex item which was examined
+//   and it may or may not be part of the current line(as it may be absolutely
+//   positioned or including it may have caused to overshoot availableInnerDim)
+//
+// - relativeChildren: Maintain a vector of the child nodes that can shrink
+//   and/or grow.
+
+struct YGCollectFlexItemsRowValues {
+  uint32_t itemsOnLine;
+  float sizeConsumedOnCurrentLine;
+  float totalFlexGrowFactors;
+  float totalFlexShrinkScaledFactors;
+  uint32_t endOfLineIndex;
+  std::vector<YGNodeRef> relativeChildren;
+  float remainingFreeSpace;
+  // The size of the mainDim for the row after considering size, padding, margin
+  // and border of flex items. This is used to calculate maxLineDim after going
+  // through all the rows to decide on the main axis size of owner.
+  float mainDim;
+  // The size of the crossDim for the row after considering size, padding,
+  // margin and border of flex items. Used for calculating containers crossSize.
+  float crossDim;
+};
+
+bool YGValueEqual(const YGValue& a, const YGValue& b);
+inline bool YGValueEqual(
+    facebook::yoga::detail::CompactValue a,
+    facebook::yoga::detail::CompactValue b) {
+  return YGValueEqual((YGValue) a, (YGValue) b);
+}
+
+// This custom float equality function returns true if either absolute
+// difference between two floats is less than 0.0001f or both are undefined.
+bool YGFloatsEqual(const float a, const float b);
+
+bool YGDoubleEqual(const double a, const double b);
+
+float YGFloatMax(const float a, const float b);
+
+YGFloatOptional YGFloatOptionalMax(
+    const YGFloatOptional op1,
+    const YGFloatOptional op2);
+
+float YGFloatMin(const float a, const float b);
+
+// This custom float comparison function compares the array of float with
+// YGFloatsEqual, as the default float comparison operator will not work(Look
+// at the comments of YGFloatsEqual function).
+template <std::size_t size>
+bool YGFloatArrayEqual(
+    const std::array<float, size>& val1,
+    const std::array<float, size>& val2) {
+  bool areEqual = true;
+  for (std::size_t i = 0; i < size && areEqual; ++i) {
+    areEqual = YGFloatsEqual(val1[i], val2[i]);
+  }
+  return areEqual;
+}
+
+// This function returns 0 if YGFloatIsUndefined(val) is true and val otherwise
+float YGFloatSanitize(const float val);
+
+YGFlexDirection YGFlexDirectionCross(
+    const YGFlexDirection flexDirection,
+    const YGDirection direction);
+
+inline bool YGFlexDirectionIsRow(const YGFlexDirection flexDirection) {
+  return flexDirection == YGFlexDirectionRow ||
+      flexDirection == YGFlexDirectionRowReverse;
+}
+
+inline YGFloatOptional YGResolveValue(
+    const YGValue value,
+    const float ownerSize) {
+  switch (value.unit) {
+    case YGUnitPoint:
+      return YGFloatOptional{value.value};
+    case YGUnitPercent:
+      return YGFloatOptional{value.value * ownerSize * 0.01f};
+    default:
+      return YGFloatOptional{};
+  }
+}
+
+inline YGFloatOptional YGResolveValue(
+    yoga::detail::CompactValue value,
+    float ownerSize) {
+  return YGResolveValue((YGValue) value, ownerSize);
+}
+
+inline bool YGFlexDirectionIsColumn(const YGFlexDirection flexDirection) {
+  return flexDirection == YGFlexDirectionColumn ||
+      flexDirection == YGFlexDirectionColumnReverse;
+}
+
+inline YGFlexDirection YGResolveFlexDirection(
+    const YGFlexDirection flexDirection,
+    const YGDirection direction) {
+  if (direction == YGDirectionRTL) {
+    if (flexDirection == YGFlexDirectionRow) {
+      return YGFlexDirectionRowReverse;
+    } else if (flexDirection == YGFlexDirectionRowReverse) {
+      return YGFlexDirectionRow;
+    }
+  }
+
+  return flexDirection;
+}
+
+inline YGFloatOptional YGResolveValueMargin(
+    yoga::detail::CompactValue value,
+    const float ownerSize) {
+  return value.isAuto() ? YGFloatOptional{0} : YGResolveValue(value, ownerSize);
+}
+
+void throwLogicalErrorWithMessage(const char* message);