381 lines
14 KiB
JavaScript
381 lines
14 KiB
JavaScript
// src/dom.js
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import { _runCode, _returnCode, setDisableRunCodeError } from './core.js';
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import { getActiveBinding, setActiveBinding, getNoWriteBack, setNoWriteBack, NewState, onNotifyUpdate } from './observer.js';
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import { Component, _makeComponent, _mergeNode } from './component.js';
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import { $, $$ } from './dom-utils.js';
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let _translator = (text, args) => {
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if (!text || typeof text !== 'string') return text;
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return text.replace(/\{(.+?)\}/g, (match, key) => {
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return args.hasOwnProperty(key) ? args[key] : match;
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})
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};
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export const SetTranslator = (fn) => _translator = fn;
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const _translate = (text) => {
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if (!text || typeof text !== 'string' || !text.includes('{#')) return text;
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return text.replace(/\{#(.+?)#\}/g, (m, content) => {
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const parts = content.split('||').map(s => s.trim());
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const rawText = parts[0];
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const args = {};
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if (parts.length > 1) {
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const matches = rawText.match(/\{(.+?)\}/g);
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if (matches) matches.forEach((match, i) => {
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const key = match.substring(1, match.length - 1);
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args[key] = parts[i + 1] || '';
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});
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}
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return _translator(rawText, args);
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});
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};
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if (typeof document !== 'undefined') {
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try {
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document.createElement('div').setAttribute('$t', '1');
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} catch (e) {
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const originalSetAttribute = Element.prototype.setAttribute;
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Element.prototype.setAttribute = function (name, value) {
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if (!name.startsWith('$')) return originalSetAttribute.call(this, name, value);
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return originalSetAttribute.call(this, 'st-' + name.substring(1), value);
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};
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}
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}
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export { $, $$ };
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onNotifyUpdate((binding) => _updateBinding(binding));
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export function _clearRenderedNodes(node) {
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if (node._renderedNodes) node._renderedNodes.forEach(nodes => {
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nodes.forEach(child => {
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child.remove();
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if (child._renderedNodes) _clearRenderedNodes(child);
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});
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});
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}
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export function _updateBinding(binding) {
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const node = binding.node;
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const tpl = binding.tpl;
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const exp = binding.exp;
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setActiveBinding(binding);
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let result = exp ? (tpl ? _returnCode(tpl, { thisNode: node }, node._thisObj || node, node._ref || null) : null) : tpl;
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setActiveBinding(null);
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if (binding.prop) {
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const prop = binding.prop;
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let o = node;
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for (let i = 0; i < prop.length - 1; i++) {
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if (!prop[i]) continue;
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if (o[prop[i]] == null) o[prop[i]] = {};
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o = o[prop[i]];
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if (typeof o !== 'object') break;
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}
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if (typeof o === 'object' && o !== null) {
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const resultIsObject = typeof result === 'object' && result != null && !Array.isArray(result);
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const lk = prop[prop.length - 1];
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if (lk) {
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if (resultIsObject && o[lk] == null) o[lk] = {};
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const lo = o[lk];
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if (typeof lo === 'object' && lo != null && lo.__watch) Object.assign(lo, result);
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else o[lk] = result;
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} else if (resultIsObject && typeof o === 'object') {
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Object.assign(o, result);
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}
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}
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} else if (binding.attr) {
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const attr = binding.attr;
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if (attr === 'if') {
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if (result) {
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if (!node._renderedNodes || node._renderedNodes.length === 0) {
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node._children.forEach(child => {
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node.parentNode.insertBefore(child, node);
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child._ref = { ...node._ref };
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});
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node._renderedNodes = [node._children];
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}
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} else {
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_clearRenderedNodes(node);
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node._renderedNodes = [];
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}
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} else if (attr === 'each') {
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if (result && typeof result === 'object') {
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const asName = node.getAttribute('as') || 'item';
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const indexName = node.getAttribute('index') || 'index';
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let keys, getVal;
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if (result instanceof Map) {
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keys = Array.from(result.keys());
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getVal = k => result.get(k);
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} else if (typeof result[Symbol.iterator] === 'function') {
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const arr = Array.isArray(result) ? result : Array.from(result);
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keys = new Array(arr.length);
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for (let i = 0; i < arr.length; i++) keys[i] = i;
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getVal = k => arr[k];
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} else {
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keys = Object.keys(result);
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getVal = k => result[k];
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}
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keys.forEach((k, i) => {
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const item = getVal(k);
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if (node._renderedNodes && i < node._renderedNodes.length) {
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node._renderedNodes[i].forEach(child => {
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child._ref[indexName] = k;
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child._ref[asName] = item;
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_scanTree(child);
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});
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} else {
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const newNodes = [];
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if (!node._renderedNodes) node._renderedNodes = [];
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node._children.forEach(child => {
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const cloned = child.cloneNode(true);
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cloned._ref = { ...node._ref };
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cloned._ref[indexName] = k;
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cloned._ref[asName] = item;
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cloned._thisObj = node._thisObj;
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node.parentNode.insertBefore(cloned, node);
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newNodes.push(cloned);
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});
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node._renderedNodes.push(newNodes);
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}
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});
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while (node._renderedNodes && node._renderedNodes.length > keys.length) {
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node._renderedNodes[node._renderedNodes.length - 1].forEach(child => {
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_clearRenderedNodes(child);
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child.remove();
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});
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node._renderedNodes.pop();
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}
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} else {
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_clearRenderedNodes(node);
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node._renderedNodes = [];
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}
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} else if (attr === 'bind') {
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if (['INPUT', 'SELECT', 'TEXTAREA'].includes(node.tagName)) {
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if (!node.hasAttribute('autocomplete')) node.setAttribute('autocomplete', 'off');
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}
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if (node.type === 'checkbox') {
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if (node.value !== 'on' && !result) {
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_runCode(`${tpl} = []`, { thisNode: node }, node._thisObj || node, node._ref || {});
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result = [];
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}
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node._checkboxMultiMode = result instanceof Array;
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const isChecked = result instanceof Array ? result.includes(node.value) : !!result;
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if (node.checked !== isChecked) node.checked = isChecked;
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} else if (node.type === 'radio') {
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if (node.checked !== (node.value === String(result ?? ''))) node.checked = (node.value === String(result ?? ''));
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} else if ('value' in node && node.type !== 'file') {
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// 这里必须用宏任务，微任务不足以确保DOM更新完成
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setTimeout(() => {
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if (node.value !== String(result ?? '')) node.value = result;
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});
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} else if (node.isContentEditable) {
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if (node.innerHTML !== String(result ?? '')) node.innerHTML = result;
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}
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node.dispatchEvent(new CustomEvent('bind', { bubbles: false, detail: result }));
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} else {
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if (['checked', 'disabled', 'readonly'].includes(attr)) result = !!result;
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if (typeof result === 'boolean') {
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result ? node.setAttribute(attr, '') : node.removeAttribute(attr);
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} else if (result !== undefined) {
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if (typeof result !== 'string') result = JSON.stringify(result);
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if (attr === 'text') {
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node.textContent = result ?? '';
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} else if (attr === 'html') {
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node.innerHTML = result ?? '';
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} else if (node.tagName === 'IMG' && attr === 'src' && result.includes('.svg')) {
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node.setAttribute('_src', result ?? '');
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} else {
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node.setAttribute(attr, result ?? '');
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}
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}
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}
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}
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}
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export const _initBinding = (binding) => {
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if (!binding.node._bindings) binding.node._bindings = [];
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binding.node._bindings.push(binding);
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_updateBinding(binding);
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};
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export const _parseNode = (node, scanObj) => {
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if (Component.exists(node.tagName) && !node._componentInitialized) {
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node._componentInitialized = true;
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_makeComponent(node.tagName, node, scanObj);
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$$(node, '[slot-id]').forEach(placeholder => placeholder.removeAttribute('slot-id'));
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if (!node._thisObj) node._thisObj = node;
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}
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if (node._bindings) {
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node._bindings.forEach(binding => _updateBinding(binding));
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if (node._hasOnUpdate) node.dispatchEvent(new Event('update', { bubbles: false }));
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return;
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}
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let attrs = [];
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if (node.tagName === 'TEMPLATE') {
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node._children = [...node.content.childNodes];
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node._renderedNodes = [];
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if (node.hasAttribute('$if')) attrs.push(node.getAttributeNode('$if'));
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else if (node.hasAttribute('$each')) attrs.push(node.getAttributeNode('$each'));
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else if (node.hasAttribute('st-if')) attrs.push(node.getAttributeNode('st-if'));
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else if (node.hasAttribute('st-each')) attrs.push(node.getAttributeNode('st-each'));
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} else {
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attrs = Array.from(node.attributes).filter(attr => (attr.name.startsWith('$') || attr.name.startsWith('st-')) && !['$if', '$each', 'st-if', 'st-each'].includes(attr.name) || attr.name.includes('.'));
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}
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if (node._thisObj && scanObj.thisObj) node._thisObj.parent = scanObj.thisObj;
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if (!node._thisObj) node._thisObj = scanObj.thisObj || null;
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if (!node._ref) node._ref = scanObj.extendVars || {};
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attrs.forEach(attr => {
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const exp = attr.name.startsWith('$') || attr.name.startsWith('st-');
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const realAttrName = exp ? attr.name.slice(attr.name.startsWith('$') ? 1 : 3) : attr.name;
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let tpl = attr.value;
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node.removeAttribute(attr.name);
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if (realAttrName.startsWith('.')) {
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_initBinding({ node: node, prop: realAttrName.split('.'), tpl, exp });
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} else {
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if (realAttrName.startsWith('on')) {
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if (realAttrName === 'onupdate') node._hasOnUpdate = true;
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if (realAttrName === 'onload' && !['BODY', 'IMG', 'IFRAME'].includes(node.tagName)) node._hasOnLoad = true;
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if (realAttrName === 'onunload' && !['BODY', 'IMG', 'IFRAME'].includes(node.tagName)) node._hasOnUnload = true;
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((node, thisObj) => {
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node.addEventListener(realAttrName.slice(2), (e) => {
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_runCode(tpl, { event: e, thisNode: node, ...(e.detail || {}) }, thisObj || node, node._ref || {});
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});
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})(node, scanObj.thisObj);
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} else {
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if (realAttrName === 'bind') {
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node.addEventListener(node.tagName === 'TEXTAREA' || node.isContentEditable || node.type === 'text' || node.type === 'password' ? 'input' : 'change', (e) => {
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let newVal = node.isContentEditable ? e.target.innerHTML : (node.type === 'checkbox' ? e.target.checked : e.target.files || e.target.value || e.detail);
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setNoWriteBack(node);
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setDisableRunCodeError(true);
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if (node.type === 'checkbox' && node._checkboxMultiMode) {
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_runCode(`!!checked ? (!${tpl}.includes(val) && ${tpl}.push(val)) : (index = ${tpl}.indexOf(val), index > -1 && ${tpl}.splice(index, 1))`, { val: node.value, checked: newVal, thisNode: node }, scanObj.thisObj || node, node._ref || {});
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} else {
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_runCode(`${tpl} = val`, { val: newVal, thisNode: node }, scanObj.thisObj || node, node._ref || {});
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}
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setDisableRunCodeError(false);
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setNoWriteBack(null);
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});
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} else if (realAttrName === 'text' && !tpl) {
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tpl = node.textContent;
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node.textContent = '';
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}
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if (tpl) {
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tpl = _translate(tpl);
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_initBinding({ node: node, attr: realAttrName, tpl, exp });
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}
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}
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}
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});
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if (node._hasOnLoad || node._componentInitialized) {
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(node => {
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Promise.resolve().then(() => node.dispatchEvent(new Event('load', { bubbles: false })));
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})(node);
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}
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if (node._hasOnUpdate) node.dispatchEvent(new Event('update', { bubbles: false }));
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if (node._thisObj) scanObj.thisObj = node._thisObj;
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};
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export const _scanTree = (node, scanObj = {}) => {
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if (node.nodeType === 3) {
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const translated = _translate(node.textContent);
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if (translated !== node.textContent) node.textContent = translated;
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return;
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}
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if (node.nodeType !== 1) return;
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Array.from(node.attributes).forEach(attr => {
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if (!attr.name.startsWith('$') && !attr.name.startsWith('st-') && !attr.name.startsWith('.')) {
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const translated = _translate(attr.value);
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if (translated !== attr.value) attr.value = translated;
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}
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});
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if (node.tagName !== 'TEMPLATE' && (node.hasAttribute('$if') || node.hasAttribute('$each') || node.hasAttribute('st-if') || node.hasAttribute('st-each'))) {
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const template = document.createElement('TEMPLATE');
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const attrs = Array.from(node.attributes).filter(attr => ['$if', '$each', 'st-if', 'st-each'].includes(attr.name) || ((node.hasAttribute('$each') || node.hasAttribute('st-each')) && ['as', 'index'].includes(attr.name)));
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attrs.forEach(attr => {
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template.setAttribute(attr.name, attr.value);
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node.removeAttribute(attr.name);
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});
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node.parentNode.insertBefore(template, node);
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template.content.appendChild(node);
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template._ref = node._ref;
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node = template;
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return;
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}
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if (node.tagName === 'TEMPLATE' && (node.hasAttribute('$if') || node.hasAttribute('st-if')) && (node.hasAttribute('$each') || node.hasAttribute('st-each'))) {
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const template = document.createElement('TEMPLATE');
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const attrs = Array.from(node.attributes).filter(attr => ['$if', '$each', 'st-if', 'st-each'].includes(attr.name));
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const attr = attrs[attrs.length - 1];
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template.setAttribute(attr.name, attr.value);
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node.removeAttribute(attr.name);
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if (attr.name === '$each' || attr.name === 'st-each') {
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Array.from(node.attributes).filter(attr => ['as', 'index'].includes(attr.name)).forEach(attr => {
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template.setAttribute(attr.name, attr.value);
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node.removeAttribute(attr.name);
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});
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}
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Array.from(node.content.childNodes).forEach(child => {
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template.content.appendChild(child);
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});
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node.content.appendChild(template);
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template._ref = node._ref;
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}
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if (node.tagName === 'IMG' && (node.hasAttribute('src') || node.hasAttribute('_src') || node.hasAttribute('$src'))) {
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const imgNode = node;
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Promise.resolve().then(() => {
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const url = imgNode.getAttribute('_src') || imgNode.getAttribute('src');
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if (url) fetch(url, { cache: 'force-cache' }).then(r => r.text()).then(svgText => {
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const realSvg = new DOMParser().parseFromString(svgText, "image/svg+xml").querySelector('svg');
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if (realSvg) {
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Array.from(imgNode.attributes).forEach(attr => realSvg.setAttribute(attr.name, attr.value));
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imgNode.replaceWith(realSvg);
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}
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});
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});
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}
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if (node._thisObj !== undefined) scanObj.thisObj = node._thisObj || null;
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if (scanObj.thisObj === undefined) {
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let curr = node;
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while (curr && curr._thisObj === undefined) curr = curr.parentNode;
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scanObj.thisObj = curr ? curr._thisObj : null;
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}
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if (node._ref === undefined) {
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let curr = node;
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while (curr && curr._ref === undefined) curr = curr.parentNode;
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node._ref = curr ? { ...curr._ref } : {};
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}
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if (scanObj.extendVars === undefined) scanObj.extendVars = {};
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if (node._ref !== undefined) {
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Object.assign(node._ref, scanObj.extendVars);
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scanObj.extendVars = { ...node._ref };
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}
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_parseNode(node, scanObj);
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const nodes = [...(node.childNodes || [])];
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scanObj.extendVars = node._ref || scanObj.extendVars;
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nodes.forEach(child => _scanTree(child, { thisObj: scanObj.thisObj, extendVars: { ...node._ref } }));
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};
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export const _unbindTree = (node) => {
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if (node.nodeType !== 1) return;
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if (node._hasOnUnload) node.dispatchEvent(new Event('unload', { bubbles: false }));
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if (node._bindings) {
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node._bindings.forEach(binding => {
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if (binding._sets) {
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binding._sets.forEach(set => set.delete(binding));
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binding._sets.clear();
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}
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});
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}
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node.childNodes && node.childNodes.forEach(child => _unbindTree(child));
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};
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export const RefreshState = _scanTree;
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