/
resolve-slots.js
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/
resolve-slots.js
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/* @flow */
/**
* Runtime helper for resolving raw children VNodes into a slot object.
*/
export function resolveSlots (
children: ?Array<VNode>,
context: ?Component
): { [key: string]: Array<VNode> } {
const slots = {}
if (!children) {
return slots
}
for (let i = 0, l = children.length; i < l; i++) {
const child = children[i]
const data = child.data
// remove slot attribute if the node is resolved as a Vue slot node
if (data && data.attrs && data.attrs.slot) {
delete data.attrs.slot
}
// named slots should only be respected if the vnode was rendered in the
// same context.
if ((child.context === context || child.functionalContext === context) &&
data && data.slot != null
) {
const name = child.data.slot
const slot = (slots[name] || (slots[name] = []))
if (child.tag === 'template') {
slot.push.apply(slot, child.children)
} else {
slot.push(child)
}
} else {
(slots.default || (slots.default = [])).push(child)
}
}
// ignore slots that contains only whitespace
for (const name in slots) {
if (slots[name].every(isWhitespace)) {
delete slots[name]
}
}
return slots
}
function isWhitespace (node: VNode): boolean {
return node.isComment || node.text === ' '
}
export function resolveScopedSlots (
fns: ScopedSlotsData, // see flow/vnode
res?: Object
): { [key: string]: Function } {
res = res || {}
for (let i = 0; i < fns.length; i++) {
if (Array.isArray(fns[i])) {
resolveScopedSlots(fns[i], res)
} else {
res[fns[i].key] = fns[i].fn
}
}
return res
}