private void updateChildrenSize(final int widthMeasureSpec, final int heightMeasureSpec) {
for (int i = 0; i < getChildCount(); i++) {
final ViewConstraints viewConstraints = mViewConstraints[i];
final View v = viewConstraints.getView();
final LayoutParams layoutParams = (LayoutParams) v.getLayoutParams();
final int mL = layoutParams.leftMargin,
mR = layoutParams.rightMargin,
mT = layoutParams.topMargin,
mB = layoutParams.bottomMargin;
measureChildWithMargins(v, widthMeasureSpec, 0, heightMeasureSpec, 0);
if (!viewConstraints.isHorizontalSpring()) {
Value childWidth;
if (v.getVisibility() == View.GONE) {
childWidth = mLayoutMath.variable(0);
} else if (layoutParams.relativeWidth > 0) {
childWidth =
mRootConstraints
.innerRight
.subtract(mRootConstraints.innerLeft)
.multiply(mLayoutMath.variable(layoutParams.relativeWidth))
.divide(mLayoutMath.variable(RELATIVE_SIZE_DENOMINATOR));
} else {
childWidth = mLayoutMath.variable(v.getMeasuredWidth());
}
viewConstraints.leftMargin.setValue(mL);
viewConstraints.rightMargin.setValue(mR);
Value outerWidth = childWidth.add(mLayoutMath.variable(mL + mR)).retain();
viewConstraints.setWidth(outerWidth);
outerWidth.release();
}
if (!viewConstraints.isVerticalSpring()) {
Value childHeight;
if (v.getVisibility() == View.GONE) {
childHeight = mLayoutMath.variable(0);
} else if (layoutParams.relativeHeight > 0) {
childHeight =
mRootConstraints
.innerBottom
.subtract(mRootConstraints.innerTop)
.multiply(mLayoutMath.variable(layoutParams.relativeHeight))
.divide(mLayoutMath.variable(RELATIVE_SIZE_DENOMINATOR));
} else {
childHeight = mLayoutMath.variable(v.getMeasuredHeight());
}
viewConstraints.topMargin.setValue(mT);
viewConstraints.bottomMargin.setValue(mB);
Value outerHeight = childHeight.add(mLayoutMath.variable(mT + mB)).retain();
viewConstraints.setHeight(outerHeight);
outerHeight.release();
}
}
}
private void handleSprings(
final Stack<ViewConstraints> springMetrics,
final boolean isWrapContentWidth,
final boolean isWrapContentHeight) {
if (!springMetrics.isEmpty()) {
mHorizontalChains.clear();
mVerticalChains.clear();
while (!springMetrics.isEmpty()) {
final ViewConstraints spring = springMetrics.pop();
final ViewConstraints chainHeadX = getChainHorizontalHead(spring);
final ViewConstraints chainHeadY = getChainVerticalHead(spring);
if (chainHeadX != null) {
if (isWrapContentWidth && mMinWidth <= 0) {
throw new IllegalStateException(
"Horizontal springs not supported when layout width is wrap_content");
}
mHorizontalChains.add(chainHeadX);
}
if (chainHeadY != null) {
if (isWrapContentHeight && mMinHeight <= 0) {
throw new IllegalStateException(
"Vertical springs not supported when layout height is wrap_content and minHeight is not defined");
}
mVerticalChains.add(chainHeadY);
}
}
for (int i = 0; i < mHorizontalChains.size(); i++) {
final ViewConstraints chainHead = mHorizontalChains.get(i);
int totalWeight = 0;
Value contentWidth = mLayoutMath.variable(0);
final ValueWrapper totalWeightWrapper = mLayoutMath.wrap();
final ValueWrapper chainWidthWrapper = mLayoutMath.wrap();
ViewConstraints chainElem = chainHead, prevElem = null;
Value start = chainElem.left, end;
while (chainElem != null) {
if (chainElem.isHorizontalSpring()) {
chainElem.markHorizontalSpringUsed();
final int weight = ((LayoutParams) chainElem.getView().getLayoutParams()).widthWeight;
totalWeight += weight;
final Value width =
chainWidthWrapper
.multiply(mLayoutMath.variable(weight))
.divide(totalWeightWrapper)
.max(mLayoutMath.variable(0))
.retain();
chainElem.setWidth(width);
width.release();
} else {
contentWidth = contentWidth.add(chainElem.getWidth());
}
prevElem = chainElem;
chainElem = chainElem.nextX;
}
end = prevElem.right;
totalWeightWrapper.setValueObject(mLayoutMath.variable(totalWeight));
chainWidthWrapper.setValueObject(end.subtract(start).subtract(contentWidth));
}
for (int i = 0; i < mVerticalChains.size(); i++) {
final ViewConstraints chainHead = mVerticalChains.get(i);
int totalWeight = 0;
Value contentHeight = mLayoutMath.variable(0);
final ValueWrapper totalWeightWrapper = mLayoutMath.wrap();
final ValueWrapper chainWidthWrapper = mLayoutMath.wrap();
ViewConstraints chainElem = chainHead, prevElem = null;
Value start = chainElem.top, end;
while (chainElem != null) {
if (chainElem.isVerticalSpring()) {
chainElem.markVerticalSpringUsed();
final int weight = ((LayoutParams) chainElem.getView().getLayoutParams()).heightWeight;
totalWeight += weight;
final Value height =
chainWidthWrapper
.multiply(mLayoutMath.variable(weight))
.divide(totalWeightWrapper)
.max(mLayoutMath.variable(0))
.retain();
chainElem.setHeight(height);
height.release();
} else {
contentHeight = contentHeight.add(chainElem.getHeight());
}
prevElem = chainElem;
chainElem = chainElem.nextY;
}
end = prevElem.bottom;
totalWeightWrapper.setValueObject(mLayoutMath.variable(totalWeight));
chainWidthWrapper.setValueObject(end.subtract(start).subtract(contentHeight));
}
}
}
