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feat: check whether current open element is clipped

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This commit is contained in:
Fatih Gungor 2025-09-13 16:11:06 +02:00
parent 0d6969c8c3
commit 3fcf08d0ac
1 changed files with 45 additions and 0 deletions
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45
clay.h
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@ -884,6 +884,8 @@ CLAY_DLL_EXPORT Clay_ElementIdArray Clay_GetPointerOverIds(void);
// An imperative function that returns true if the pointer position provided by Clay_SetPointerState is within the element with the provided ID's bounding box.
// This ID can be calculated either with CLAY_ID() for string literal IDs, or Clay_GetElementId for dynamic strings.
CLAY_DLL_EXPORT Clay_ScrollContainerData Clay_GetScrollContainerData(Clay_ElementId id);
// Returns whether the element with the provided ID is clipped by a clip region
CLAY_DLL_EXPORT bool Clay_IsClipped(Clay_ElementId id);
// Binds a callback function that Clay will call to determine the dimensions of a given string slice.
// - measureTextFunction is a user provided function that adheres to the interface Clay_Dimensions (Clay_StringSlice text, Clay_TextElementConfig *config, void *userData);
// - userData is a pointer that will be transparently passed through when the measureTextFunction is called.
@ -1709,6 +1711,28 @@ bool Clay__PointIsInsideRect(Clay_Vector2 point, Clay_BoundingBox rect) {
return point.x >= rect.x && point.x <= rect.x + rect.width && point.y >= rect.y && point.y <= rect.y + rect.height;
}
bool Clay__RectIsOutsideRect(Clay_BoundingBox rectA, Clay_BoundingBox rectB) {
// Compute the edges of both rectangles
const float leftA = rectA.x;
const float rightA = rectA.x + rectA.width;
const float topA = rectA.y;
const float bottomA = rectA.y + rectA.height;
const float leftB = rectB.x;
const float rightB = rectB.x + rectB.width;
const float topB = rectB.y;
const float bottomB = rectB.y + rectB.height;
// Check if 'a' is completely outside 'b'
if (rightA <= leftB) return true; // a is left of b
if (leftA >= rightB) return true; // a is right of b
if (bottomA <= topB) return true; // a is above b
if (topA >= bottomB) return true; // a is below b
// Otherwise, they overlap (so not completely outside)
return false;
}
Clay_LayoutElementHashMapItem* Clay__AddHashMapItem(Clay_ElementId elementId, Clay_LayoutElement* layoutElement, uint32_t idAlias) {
Clay_Context* context = Clay_GetCurrentContext();
if (context->layoutElementsHashMapInternal.length == context->layoutElementsHashMapInternal.capacity - 1) {
@ -4334,6 +4358,27 @@ Clay_ScrollContainerData Clay_GetScrollContainerData(Clay_ElementId id) {
return CLAY__INIT(Clay_ScrollContainerData) CLAY__DEFAULT_STRUCT;
}
CLAY_WASM_EXPORT("Clay_GetScrollContainerData")
bool Clay_IsClipped(Clay_ElementId id) {
Clay_Context* context = Clay_GetCurrentContext();
if (context->openClipElementStack.length == 0) {
return false;
}
const auto clipElementId =
Clay__int32_tArray_GetValue(&context->openClipElementStack, context->openClipElementStack.length - 1);
if (clipElementId == 0)
return false;
const Clay_LayoutElementHashMapItem *clipItem = Clay__GetHashMapItem(clipElementId);
const Clay_ElementData elementData = Clay_GetElementData(id);
if (Clay__RectIsOutsideRect(elementData.boundingBox, clipItem->boundingBox)) {
return true;
}
return false;
}
CLAY_WASM_EXPORT("Clay_GetElementData")
Clay_ElementData Clay_GetElementData(Clay_ElementId id){
Clay_LayoutElementHashMapItem * item = Clay__GetHashMapItem(id.id);