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Fix build.

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ArthurSonzogni
2025-10-19 18:23:54 +02:00
parent 1d0913bfb9
commit 01d2451dfd
1 changed files with 10 additions and 14 deletions
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24
src/ftxui/dom/box_helper.cpp
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@@ -10,6 +10,12 @@
namespace ftxui::box_helper {
namespace {
int SafeRatio(int value, int numerator, int denominator) {
return static_cast<int64_t>(value) * static_cast<int64_t>(numerator) /
std::max(static_cast<int64_t>(denominator), static_cast<int64_t>(1));
}
// Called when the size allowed is greater than the requested size. This
// distributes the extra spaces toward the flexible elements, in relative
// proportions.
@@ -18,7 +24,7 @@ void ComputeGrow(std::vector<Element>* elements,
int flex_grow_sum) {
for (Element& element : *elements) {
const int added_space =
extra_space * element.flex_grow / std::max(flex_grow_sum, 1);
SafeRatio(extra_space, element.flex_grow, flex_grow_sum);
extra_space -= added_space;
flex_grow_sum -= element.flex_grow;
element.size = element.min_size + added_space;
@@ -32,8 +38,8 @@ void ComputeShrinkEasy(std::vector<Element>* elements,
int extra_space,
int flex_shrink_sum) {
for (Element& element : *elements) {
const int added_space = extra_space * element.min_size *
element.flex_shrink / std::max(flex_shrink_sum, 1);
const int added_space = SafeRatio(
extra_space, element.min_size * element.flex_shrink, flex_shrink_sum);
extra_space -= added_space;
flex_shrink_sum -= element.flex_shrink * element.min_size;
element.size = element.min_size + added_space;
@@ -53,17 +59,7 @@ void ComputeShrinkHard(std::vector<Element>* elements,
continue;
}
// Perform operation into int64_t to avoid overflow.
// The size of an int is at most 32 bits, so the multiplication can't
// overflow int64_t. Since `size` is the sum of elements.min_size, it is
// greater than every element.min_size. The added_space represents the
// fraction of extra_space assigned to this element, so it is always less
// than extra_space in absolute. Since extra_space fits into int,
// added_space fits into int as well.
int added_space =
static_cast<int>(static_cast<int64_t>(extra_space) *
static_cast<int64_t>(element.min_size) /
std::max(static_cast<int64_t>(size), 1L));
const int added_space = SafeRatio(extra_space, element.min_size, size);
extra_space -= added_space;
size -= element.min_size;