refactor: reorganize all components (#8303)

src/col/Col.tsx

@@ -0,0 +1,55 @@
+import { computed, PropType, defineComponent } from 'vue';
+import { createNamespace } from '../utils';
+import { useParent } from '@vant/use';
+import { ROW_KEY, RowProvide } from '../row/Row';
+
+const [name, bem] = createNamespace('col');
+
+export default defineComponent({
+  name,
+
+  props: {
+    offset: [Number, String],
+    tag: {
+      type: String as PropType<keyof HTMLElementTagNameMap>,
+      default: 'div',
+    },
+    span: {
+      type: [Number, String],
+      default: 0,
+    },
+  },
+
+  setup(props, { slots }) {
+    const { parent, index } = useParent<RowProvide>(ROW_KEY);
+
+    const style = computed(() => {
+      if (!parent) {
+        return;
+      }
+
+      const { spaces } = parent;
+
+      if (spaces && spaces.value && spaces.value[index.value]) {
+        const { left, right } = spaces.value[index.value];
+        return {
+          paddingLeft: left ? `${left}px` : null,
+          paddingRight: right ? `${right}px` : null,
+        };
+      }
+    });
+
+    return () => {
+      const { tag, span, offset } = props;
+
+      return (
+        <tag
+          style={style.value}
+          class={bem({ [span]: span, [`offset-${offset}`]: offset })}
+        >
+          {slots.default?.()}
+        </tag>
+      );
+    };
+  },
+});