优化模板解析;修复事件绑定
parent
bbe04eae83
commit
b4e7f5dfae
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@ -44,7 +44,6 @@ export const __props__ = Symbol('props')
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export const __changed_props__ = Symbol('changed_props')
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export const __mounted__ = Symbol('mounted')
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export const __pending__ = Symbol('pending')
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export const __children__ = Symbol('children')
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export const RESET_CSS_STYLE = `* {box-sizing: border-box;margin: 0;padding: 0;}::before,::after {box-sizing: border-box;}::selection {background: var(--selection-background, var(--color-plain-a));color: var(--selection-color, inherit);}`
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136
src/html.js
136
src/html.js
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@ -6,6 +6,7 @@
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import { boolMap, WC_PART, NOTHING } from './constants.js'
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import { animate, MODES } from './anim.js'
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import { nextTick } from './utils.js'
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const boundAttributeSuffix = '$wc$'
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const marker = `wc$${String(Math.random()).slice(9)}$`
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@ -265,7 +266,7 @@ class TemplateInstance {
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} while ((node = walker.nextNode()) !== null)
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}
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_clone(options) {
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clone(options) {
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let {
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el: { content },
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parts
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@ -326,7 +327,7 @@ class TemplateInstance {
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return fragment
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}
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_update(values) {
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update(values) {
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let i = 0
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for (let part of this.$parts) {
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if (part !== void 0) {
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@ -343,9 +344,10 @@ class TemplateInstance {
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}
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class ChildPart {
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#value = NOTHING
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constructor(startNode, endNode, parent, options) {
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this.type = CHILD_PART
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this._$committedValue = NOTHING
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this.startNode = startNode
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this.endNode = endNode
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this.$parent = parent
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@ -364,46 +366,43 @@ class ChildPart {
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$setValue(value) {
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if (isPrimitive(value)) {
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if (value === NOTHING || value == null || value === '') {
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if (this._$committedValue !== NOTHING) {
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if (this.#value !== NOTHING) {
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this.#clear()
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}
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this._$committedValue = NOTHING
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} else if (value !== this._$committedValue) {
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this._commitText(value)
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this.#value = NOTHING
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} else if (value !== this.#value) {
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this.#commitText(value)
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}
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} else if (value['__dom_type__'] !== void 0) {
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this._commitTemplateResult(value)
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this.#commitTemplateResult(value)
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} else if (value.nodeType !== void 0) {
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this._commitNode(value)
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this.#commitNode(value)
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} else if (isIterable(value)) {
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this._commitIterable(value)
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this.#commitIterable(value)
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} else {
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this._commitText(value)
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this.#commitText(value)
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}
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}
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_insert(node, target = this.endNode) {
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#insert(node, target = this.endNode) {
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return this.startNode.parentNode.insertBefore(node, target)
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}
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_commitNode(value) {
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if (this._$committedValue !== value) {
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#commitNode(value) {
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if (this.#value !== value) {
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this.#clear()
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this._$committedValue = this._insert(value)
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this.#value = this.#insert(value)
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}
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}
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_commitText(value) {
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if (
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this._$committedValue !== NOTHING &&
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isPrimitive(this._$committedValue)
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) {
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#commitText(value) {
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if (this.#value !== NOTHING && isPrimitive(this.#value)) {
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let node = this.startNode.nextSibling
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node.data = value
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} else {
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this._commitNode(document.createTextNode(value))
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this.#commitNode(document.createTextNode(value))
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}
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this._$committedValue = value
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this.#value = value
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}
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_commitTemplateResult(result) {
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#commitTemplateResult(result) {
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let { values, ['__dom_type__']: type } = result
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let template =
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typeof type === 'number'
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@ -411,16 +410,16 @@ class ChildPart {
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: (type.el === void 0 && (type.el = Template.createElement(type.h)),
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type)
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if (this._$committedValue?.$template === template) {
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this._$committedValue._update(values)
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if (this.#value?.$template === template) {
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this.#value.update(values)
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} else {
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let instance = new TemplateInstance(template, this)
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let fragment = instance._clone(this.options)
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let fragment = instance.clone(this.options)
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instance._update(values)
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instance.update(values)
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this._commitNode(fragment)
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this._$committedValue = instance
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this.#commitNode(fragment)
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this.#value = instance
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}
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}
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#getTemplate(result) {
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@ -432,20 +431,21 @@ class ChildPart {
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}
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return template
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}
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_commitIterable(value) {
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if (!isArray(this._$committedValue)) {
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this._$committedValue = []
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#commitIterable(value) {
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if (!isArray(this.#value)) {
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this.#value = []
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this.#clear()
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}
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let itemParts = this._$committedValue
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let itemParts = this.#value
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let partIndex = 0
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let itemPart
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for (let item of value) {
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if (partIndex === itemParts.length) {
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itemParts.push(
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(itemPart = new ChildPart(
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this._insert(createMarker()),
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this._insert(createMarker()),
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this.#insert(createMarker()),
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this.#insert(createMarker()),
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this,
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this.options
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))
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@ -472,19 +472,19 @@ class ChildPart {
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}
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// 常规属性
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class AttributePart {
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#value = NOTHING
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constructor(element, name, strings, decorates, parent, options = {}) {
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this.type = ATTRIBUTE_PART
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this._$committedValue = NOTHING
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this.element = element
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this.name = name
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this.decorates = decorates
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this.$parent = parent
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this.options = options
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if (strings.length > 2 || strings[0] !== '' || strings[1] !== '') {
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this._$committedValue = Array(strings.length - 1).fill(null)
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this.#value = Array(strings.length - 1).fill(null)
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this.strings = strings
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} else {
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this._$committedValue = NOTHING
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}
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}
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get tagName() {
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@ -495,9 +495,9 @@ class AttributePart {
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let strings = this.strings
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let changed = false
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if (strings === void 0) {
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changed = !isPrimitive(value) || value !== this._$committedValue
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changed = !isPrimitive(value) || value !== this.#value
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if (changed) {
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this._$committedValue = value
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this.#value = value
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}
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} else {
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let values = value
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@ -506,13 +506,13 @@ class AttributePart {
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for (let i = 0; i < strings.length - 1; i++) {
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let v = values[valueIndex + i]
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changed || (changed = !isPrimitive(v) || v !== this._$committedValue[i])
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changed || (changed = !isPrimitive(v) || v !== this.#value[i])
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if (v === NOTHING) {
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value = NOTHING
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} else if (value !== NOTHING) {
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value += (v !== null && v !== void 0 ? v : '') + strings[i + 1]
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}
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this._$committedValue[i] = v
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this.#value[i] = v
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}
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}
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if (changed) {
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@ -587,9 +587,27 @@ class EventPart extends AttributePart {
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this.type = EVENT_PART
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}
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#clearBindings() {
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let host = this.options.host
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let events = host.$events[this.name]
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for (let i = -1, it; (it = events[++i]); ) {
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if (!host.root.contains(it.el)) {
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this.element.removeEventListener(this.name, it.listener, it.options)
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events[i] = null
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}
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}
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host.$events[this.name] = events.filter(it => it !== null)
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}
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$setValue(listener) {
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let host = this.options.host
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let options = {}
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let events = host.$events[this.name]
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if (!events) {
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events = host.$events[this.name] = []
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}
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if (this.decorates.length) {
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for (let it of this.decorates) {
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@ -614,42 +632,40 @@ class EventPart extends AttributePart {
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let shouldRemove = listener !== this.#listener
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if (this.#listener && host.$events[this.name]) {
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for (let it of host.$events[this.name]) {
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if (this.#listener) {
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for (let i = -1, it; (it = events[++i]); ) {
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if (it.el === this.element) {
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shouldRemove =
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shouldRemove ||
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options.capture !== it.capture ||
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options.once !== it.once ||
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options.passive !== it.passive
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if (shouldRemove) {
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this.element.removeEventListener(this.name, it.listener, it.options)
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events[i] = null
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}
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break
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}
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}
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}
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events = events.filter(it => it !== null)
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host.$events[this.name] = events
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if (listener && shouldRemove) {
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this.element.addEventListener(this.name, this, options)
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this.#listener = listener
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if (host.$events[this.name]) {
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host.$events[this.name].push({
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el: this.element,
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listener: this,
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options
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})
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} else {
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host.$events[this.name] = [
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{
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el: this.element,
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listener: this,
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options
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}
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]
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}
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events.push({
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el: this.element,
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listener: this,
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options
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})
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}
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nextTick(_ => this.#clearBindings())
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}
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handleEvent(ev) {
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this.#stop(ev)
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this.#prevent(ev)
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@ -13,8 +13,7 @@ import {
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__props__,
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__changed_props__,
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__mounted__,
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__pending__,
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__children__
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__pending__
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} from './constants.js'
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import { css, adoptStyles } from './css.js'
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import { render, html, svg, raw } from './html.js'
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@ -406,7 +405,7 @@ export class Component extends HTMLElement {
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#render() {
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try {
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let ast = this.render()
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this[__children__] = render(ast, this.root, {
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render(ast, this.root, {
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host: this
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})
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} catch (err) {
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