1 files changed, 93 insertions, 0 deletions

diff --git a/src/widget/widget.c b/src/widget/widget.c
new file mode 100644
index 0000000..ef79ac4
--- /dev/null
+++ b/src/widget/widget.c
@@ -0,0 +1,93 @@
+#include "widget.h"
+
+#include <cassert.h>
+
+// -----------------------------------------------------------------------------
+// Widget.
+
+#define UI_DEL(ppWidget)       \
+  {                            \
+    assert(ppWidget);          \
+    void* widget_ = *ppWidget; \
+    if (widget_) {             \
+      free(widget_);           \
+      *ppWidget = 0;           \
+    }                          \
+  }
+
+uiWidgetType uiWidgetGetType(const uiWidget* widget) {
+  assert(widget);
+  return widget->type;
+}
+
+void DestroyWidget(uiWidget** ppWidget) {
+  assert(ppWidget);
+
+  uiWidget* widget = *ppWidget;
+  if (widget) {
+    list_foreach_mut(widget->children, child, { DestroyWidget(&child); });
+  }
+  UI_DEL(ppWidget);
+}
+
+void uiWidgetSetParent(uiPtr child_, uiPtr parent_) {
+  uiWidget* child  = child_.widget;
+  uiWidget* parent = parent_.widget;
+
+  assert(child);
+  assert(parent);
+
+  list_add(parent->children, child);
+}
+
+// -----------------------------------------------------------------------------
+// Widget pointers.
+
+uiPtr uiMakeButtonPtr(uiButton* button) {
+  assert(button);
+  return (uiPtr){.type = uiTypeButton, .button = button};
+}
+
+uiPtr uiMakeFramePtr(uiFrame* frame) {
+  assert(frame);
+  return (uiPtr){.type = uiTypeFrame, .frame = frame};
+}
+
+uiPtr uiMakeLabelPtr(uiLabel* label) {
+  assert(label);
+  return (uiPtr){.type = uiTypeLabel, .label = label};
+}
+
+uiPtr uiMakeTablePtr(uiTable* table) {
+  assert(table);
+  return (uiPtr){.type = uiTypeTable, .table = table};
+}
+
+static uiPtr uiMakeWidgetPtr(uiWidget* widget) {
+  assert(widget);
+  return (uiPtr){.type = widget->type, .widget = widget};
+}
+
+uiButton* uiGetButtonPtr(uiPtr ptr) {
+  assert(ptr.type == uiTypeButton);
+  assert(ptr.button);
+  return ptr.button;
+}
+
+uiFrame* uiGetFramePtr(uiPtr ptr) {
+  assert(ptr.type == uiTypeFrame);
+  assert(ptr.frame);
+  return ptr.frame;
+}
+
+uiLabel* uiGetLabelPtr(uiPtr ptr) {
+  assert(ptr.type == uiTypeLabel);
+  assert(ptr.label);
+  return ptr.label;
+}
+
+uiTable* uiGetTablePtr(uiPtr ptr) {
+  assert(ptr.type == uiTypeTable);
+  assert(ptr.table);
+  return ptr.table;
+}