mirror of
https://github.com/odoo/owl.git
synced 2025-10-06 19:59:41 +07:00
rename qweb_vdom into qweb
This commit is contained in:
Géry Debongnie
+939
@@ -0,0 +1,939 @@
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import h from "../libs/snabbdom/src/h";
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import { VNode } from "../libs/snabbdom/src/vnode";
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//------------------------------------------------------------------------------
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// Types
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//------------------------------------------------------------------------------
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export type EvalContext = { [key: string]: any };
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export type RawTemplate = string;
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export type CompiledTemplate<T> = (context: EvalContext, extra: any) => T;
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type ProcessedTemplate = Element;
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const RESERVED_WORDS = "true,false,NaN,null,undefined,debugger,console,window,in,instanceof,new,function,return,this,typeof,eval,void,Math,RegExp,Array,Object,Date".split(
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","
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);
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const WORD_REPLACEMENT = {
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and: "&&",
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or: "||",
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gt: ">",
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gte: ">=",
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lt: "<",
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lte: "<="
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};
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//------------------------------------------------------------------------------
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// Compilation Context
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//------------------------------------------------------------------------------
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export class Context {
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nextID: number = 1;
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code: string[] = [];
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variables: { [key: string]: any } = {};
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escaping: boolean = false;
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parentNode: number | null = null;
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rootNode: number | null = null;
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||||
indentLevel: number = 0;
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rootContext: Context;
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caller: Element | undefined;
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shouldDefineOwner: boolean = false;
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shouldProtectContext: boolean = false;
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inLoop: boolean = false;
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constructor() {
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this.rootContext = this;
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this.addLine("let h = this.utils.h;");
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}
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generateID(): number {
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const id = this.rootContext.nextID++;
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return id;
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}
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withParent(node: number): Context {
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const newContext: Context = Object.create(this);
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if (this === this.rootContext && this.parentNode) {
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throw new Error("A template should not have more than one root node");
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}
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newContext.parentNode = node;
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if (!this.rootContext.rootNode) {
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this.rootContext.rootNode = node;
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}
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return newContext;
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}
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withVariables(variables: { [key: string]: any }) {
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const newContext = Object.create(this);
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newContext.variables = Object.create(variables);
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return newContext;
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}
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|
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withInLoop(): Context {
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const newContext = Object.create(this);
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newContext.inLoop = true;
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return newContext;
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}
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|
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withCaller(node: Element): Context {
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const newContext = Object.create(this);
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newContext.caller = node;
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return newContext;
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}
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|
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withEscaping(): Context {
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const newContext = Object.create(this);
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newContext.escaping = true;
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return newContext;
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}
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|
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indent() {
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this.indentLevel++;
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}
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dedent() {
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this.indentLevel--;
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}
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addLine(line: string) {
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const prefix = new Array(this.indentLevel + 2).join(" ");
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this.code.push(prefix + line);
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}
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addIf(condition: string) {
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this.addLine(`if (${condition}) {`);
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this.indent();
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}
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|
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addElse() {
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this.dedent();
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this.addLine("} else {");
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this.indent();
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}
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|
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closeIf() {
|
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this.dedent();
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this.addLine("}");
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}
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||||
|
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getValue(val: any): any {
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return val in this.variables ? this.getValue(this.variables[val]) : val;
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}
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}
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//------------------------------------------------------------------------------
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// QWeb rendering engine
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//------------------------------------------------------------------------------
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export class QWeb {
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processedTemplates: { [name: string]: ProcessedTemplate } = {};
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templates: { [name: string]: CompiledTemplate<VNode> } = {};
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exprCache: { [key: string]: string } = {};
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directives: Directive[] = [];
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|
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constructor() {
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[
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forEachDirective,
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escDirective,
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rawDirective,
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setDirective,
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elseDirective,
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elifDirective,
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ifDirective,
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callDirective,
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onDirective,
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refDirective,
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widgetDirective
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].forEach(d => this.addDirective(d));
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}
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utils = {
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h: h,
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getFragment(str: string): DocumentFragment {
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const temp = document.createElement("template");
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temp.innerHTML = str;
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return temp.content;
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}
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};
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addDirective(dir: Directive) {
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this.directives.push(dir);
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this.directives.sort((d1, d2) => d1.priority - d2.priority);
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}
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/**
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* Add a template to the internal template map. Note that it is not
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* immediately compiled.
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*/
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addTemplate(
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name: string,
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template: RawTemplate,
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allowDuplicates: boolean = false
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) {
|
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if (name in this.processedTemplates) {
|
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if (allowDuplicates) {
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return;
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} else {
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throw new Error(`Template ${name} already defined`);
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}
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}
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const parser = new DOMParser();
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const doc = parser.parseFromString(template, "text/xml");
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if (!doc.firstChild) {
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throw new Error("Invalid template (should not be empty)");
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}
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if (doc.getElementsByTagName("parsererror").length) {
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throw new Error("Invalid XML in template");
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}
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let elem = doc.firstChild as Element;
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this._processTemplate(elem);
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this.processedTemplates[name] = elem;
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}
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|
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_processTemplate(elem: Element) {
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let tbranch = elem.querySelectorAll("[t-elif], [t-else]");
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for (let i = 0, ilen = tbranch.length; i < ilen; i++) {
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let node = tbranch[i];
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let prevElem = node.previousElementSibling!;
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let pattr = function(name) {
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return prevElem.getAttribute(name);
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};
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let nattr = function(name) {
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return +!!node.getAttribute(name);
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};
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if (prevElem && (pattr("t-if") || pattr("t-elif"))) {
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if (pattr("t-foreach")) {
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throw new Error(
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"t-if cannot stay at the same level as t-foreach when using t-elif or t-else"
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);
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}
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if (
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["t-if", "t-elif", "t-else"].map(nattr).reduce(function(a, b) {
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return a + b;
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}) > 1
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) {
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throw new Error(
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||||
"Only one conditional branching directive is allowed per node"
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||||
);
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}
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// All text nodes between branch nodes are removed
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let textNode;
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while ((textNode = node.previousSibling) !== prevElem) {
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if (textNode.nodeValue.trim().length) {
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throw new Error("text is not allowed between branching directives");
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}
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textNode.remove();
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}
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} else {
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throw new Error(
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"t-elif and t-else directives must be preceded by a t-if or t-elif directive"
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||||
);
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}
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}
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||||
}
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||||
/**
|
||||
* Load templates from a xml (as a string). This will look up for the first
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||||
* <templates> tag, and will consider each child of this as a template, with
|
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* the name given by the t-name attribute.
|
||||
*/
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||||
loadTemplates(xmlstr: string) {
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const parser = new DOMParser();
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const doc = parser.parseFromString(xmlstr, "text/xml");
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const templates = doc.getElementsByTagName("templates")[0];
|
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if (!templates) {
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return;
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}
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for (let elem of <any>templates.children) {
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const name = elem.getAttribute("t-name");
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this._processTemplate(elem);
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this.processedTemplates[name] = elem;
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}
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||||
}
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/**
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* Render a template
|
||||
*
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||||
* @param {string} name the template should already have been added
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*/
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render(name: string, context: EvalContext = {}, extra: any = null): VNode {
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if (!(name in this.processedTemplates)) {
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throw new Error(`Template ${name} does not exist`);
|
||||
}
|
||||
const template = this.templates[name] || this._compile(name);
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return template.call(this, context, extra);
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}
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||||
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_compile(name: string): CompiledTemplate<VNode> {
|
||||
if (name in this.templates) {
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||||
return this.templates[name];
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||||
}
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||||
|
||||
const mainNode = this.processedTemplates[name];
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const isDebug = (<Element>mainNode).attributes.hasOwnProperty("t-debug");
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const ctx = new Context();
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this._compileNode(mainNode, ctx);
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if (ctx.shouldProtectContext) {
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ctx.code.unshift(" context = Object.create(context);");
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}
|
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if (ctx.shouldDefineOwner) {
|
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// this is necessary to prevent some directives (t-forach for ex) to
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// pollute the rendering context by adding some keys in it.
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ctx.code.unshift(" let owner = context;");
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}
|
||||
|
||||
if (!ctx.rootNode) {
|
||||
throw new Error("A template should have one root node");
|
||||
}
|
||||
ctx.addLine(`return vn${ctx.rootNode};`);
|
||||
if (isDebug) {
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ctx.code.unshift(" debugger");
|
||||
}
|
||||
let template;
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try {
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template = new Function(
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"context",
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"extra",
|
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ctx.code.join("\n")
|
||||
) as CompiledTemplate<VNode>;
|
||||
} catch (e) {
|
||||
throw new Error(`Invalid template (or compiled code): ${e.message}`);
|
||||
}
|
||||
if (isDebug) {
|
||||
console.log(
|
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`Template: ${
|
||||
this.processedTemplates[name].outerHTML
|
||||
}\nCompiled code:\n` + template.toString()
|
||||
);
|
||||
}
|
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this.templates[name] = template;
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return template;
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}
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|
||||
/**
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* Generate code from an xml node
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*
|
||||
*/
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_compileNode(node: ChildNode, ctx: Context) {
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if (!(node instanceof Element)) {
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// this is a text node, there are no directive to apply
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let text = node.textContent!;
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if (ctx.parentNode) {
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ctx.addLine(`c${ctx.parentNode}.push({text: \`${text}\`});`);
|
||||
} else {
|
||||
// this is an unusual situation: this text node is the result of the
|
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// template rendering.
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||||
let nodeID = ctx.generateID();
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ctx.addLine(`let vn${nodeID} = {text: \`${text}\`};`);
|
||||
ctx.rootContext.rootNode = nodeID;
|
||||
ctx.rootContext.parentNode = nodeID;
|
||||
}
|
||||
return;
|
||||
}
|
||||
|
||||
const attributes = (<Element>node).attributes;
|
||||
|
||||
const validDirectives: {
|
||||
directive: Directive;
|
||||
value: string;
|
||||
fullName: string;
|
||||
}[] = [];
|
||||
|
||||
let withHandlers = false;
|
||||
|
||||
for (let directive of this.directives) {
|
||||
// const value = attributes[i].textContent!;
|
||||
let fullName;
|
||||
let value;
|
||||
for (let i = 0; i < attributes.length; i++) {
|
||||
const name = attributes[i].name;
|
||||
if (
|
||||
name === "t-" + directive.name ||
|
||||
name.startsWith("t-" + directive.name + "-")
|
||||
) {
|
||||
fullName = name;
|
||||
value = attributes[i].textContent;
|
||||
validDirectives.push({ directive, value, fullName });
|
||||
if (directive.name === "on") {
|
||||
withHandlers = true;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
for (let { directive, value, fullName } of validDirectives) {
|
||||
if (directive.atNodeEncounter) {
|
||||
const isDone = directive.atNodeEncounter({
|
||||
node,
|
||||
qweb: this,
|
||||
ctx,
|
||||
fullName,
|
||||
value
|
||||
});
|
||||
if (isDone) {
|
||||
return;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (node.nodeName !== "t") {
|
||||
let nodeID = this._compileGenericNode(node, ctx, withHandlers);
|
||||
ctx = ctx.withParent(nodeID);
|
||||
|
||||
for (let { directive, value, fullName } of validDirectives) {
|
||||
if (directive.atNodeCreation) {
|
||||
directive.atNodeCreation({
|
||||
node,
|
||||
qweb: this,
|
||||
ctx,
|
||||
fullName,
|
||||
value,
|
||||
nodeID
|
||||
});
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
this._compileChildren(node, ctx);
|
||||
|
||||
for (let { directive, value, fullName } of validDirectives) {
|
||||
if (directive.finalize) {
|
||||
directive.finalize({ node, qweb: this, ctx, fullName, value });
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
_compileGenericNode(
|
||||
node: ChildNode,
|
||||
ctx: Context,
|
||||
withHandlers: boolean = true
|
||||
): number {
|
||||
// nodeType 1 is generic tag
|
||||
if (node.nodeType !== 1) {
|
||||
throw new Error("unsupported node type");
|
||||
}
|
||||
const attributes = (<Element>node).attributes;
|
||||
const attrs: string[] = [];
|
||||
const tattrs: number[] = [];
|
||||
for (let i = 0; i < attributes.length; i++) {
|
||||
let name = attributes[i].name;
|
||||
const value = attributes[i].textContent!;
|
||||
|
||||
// regular attributes
|
||||
if (!name.startsWith("t-")) {
|
||||
const attID = ctx.generateID();
|
||||
ctx.addLine(`let _${attID} = '${value}';`);
|
||||
if (!name.match(/^[a-zA-Z]+$/)) {
|
||||
// attribute contains 'non letters' => we want to quote it
|
||||
name = '"' + name + '"';
|
||||
}
|
||||
attrs.push(`${name}: _${attID}`);
|
||||
}
|
||||
|
||||
// dynamic attributes
|
||||
if (name.startsWith("t-att-")) {
|
||||
let attName = name.slice(6);
|
||||
let formattedValue = this._formatExpression(ctx.getValue(value!));
|
||||
const attID = ctx.generateID();
|
||||
if (!attName.match(/^[a-zA-Z]+$/)) {
|
||||
// attribute contains 'non letters' => we want to quote it
|
||||
attName = '"' + attName + '"';
|
||||
}
|
||||
// we need to combine dynamic with non dynamic attributes:
|
||||
// class="a" t-att-class="'yop'" should be rendered as class="a yop"
|
||||
const attValue = (<Element>node).getAttribute(attName);
|
||||
if (attValue) {
|
||||
const attValueID = ctx.generateID();
|
||||
ctx.addLine(`let _${attValueID} = ${formattedValue};`);
|
||||
formattedValue = `'${attValue}' + (_${attValueID} ? ' ' + _${attValueID} : '')`;
|
||||
}
|
||||
ctx.addLine(`let _${attID} = ${formattedValue};`);
|
||||
attrs.push(`${attName}: _${attID}`);
|
||||
}
|
||||
|
||||
if (name.startsWith("t-attf-")) {
|
||||
let attName = name.slice(7);
|
||||
if (!attName.match(/^[a-zA-Z]+$/)) {
|
||||
// attribute contains 'non letters' => we want to quote it
|
||||
attName = '"' + attName + '"';
|
||||
}
|
||||
const formattedExpr = value!.replace(
|
||||
/\{\{.*?\}\}/g,
|
||||
s => "${" + this._formatExpression(s.slice(2, -2)) + "}"
|
||||
);
|
||||
const attID = ctx.generateID();
|
||||
ctx.addLine(`let _${attID} = \`${formattedExpr}\`;`);
|
||||
attrs.push(`${attName}: _${attID}`);
|
||||
}
|
||||
|
||||
// t-att= attributes
|
||||
if (name === "t-att") {
|
||||
let id = ctx.generateID();
|
||||
ctx.addLine(`let _${id} = ${this._formatExpression(value!)};`);
|
||||
tattrs.push(id);
|
||||
}
|
||||
}
|
||||
let nodeID = ctx.generateID();
|
||||
const parts = [`key:${nodeID}`];
|
||||
if (attrs.length + tattrs.length > 0) {
|
||||
parts.push(`attrs:{${attrs.join(",")}}`);
|
||||
}
|
||||
if (withHandlers) {
|
||||
parts.push(`on:{}`);
|
||||
}
|
||||
|
||||
ctx.addLine(`let c${nodeID} = [], p${nodeID} = {${parts.join(",")}};`);
|
||||
for (let id of tattrs) {
|
||||
ctx.addIf(`_${id} instanceof Array`);
|
||||
ctx.addLine(`p${nodeID}.attrs[_${id}[0]] = _${id}[1];`);
|
||||
ctx.addElse();
|
||||
ctx.addLine(`for (let key in _${id}) {`);
|
||||
ctx.indent();
|
||||
ctx.addLine(`p${nodeID}.attrs[key] = _${id}[key];`);
|
||||
ctx.dedent();
|
||||
ctx.addLine(`}`);
|
||||
ctx.closeIf();
|
||||
}
|
||||
ctx.addLine(
|
||||
`let vn${nodeID} = h('${node.nodeName}', p${nodeID}, c${nodeID});`
|
||||
);
|
||||
if (ctx.parentNode) {
|
||||
ctx.addLine(`c${ctx.parentNode}.push(vn${nodeID});`);
|
||||
}
|
||||
|
||||
return nodeID;
|
||||
}
|
||||
|
||||
_compileChildren(node: ChildNode, ctx: Context) {
|
||||
if (node.childNodes.length > 0) {
|
||||
for (let child of Array.from(node.childNodes)) {
|
||||
this._compileNode(child, ctx);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
_formatExpression(e: string): string {
|
||||
if (e in this.exprCache) {
|
||||
return this.exprCache[e];
|
||||
}
|
||||
// Thanks CHM for this code...
|
||||
const chars = e.split("");
|
||||
let instring = "";
|
||||
let invar = "";
|
||||
let invarPos = 0;
|
||||
let r = "";
|
||||
chars.push(" ");
|
||||
for (var i = 0, ilen = chars.length; i < ilen; i++) {
|
||||
var c = chars[i];
|
||||
if (instring.length) {
|
||||
if (c === instring && chars[i - 1] !== "\\") {
|
||||
instring = "";
|
||||
}
|
||||
} else if (c === '"' || c === "'") {
|
||||
instring = c;
|
||||
} else if (c.match(/[a-zA-Z_\$]/) && !invar.length) {
|
||||
invar = c;
|
||||
invarPos = i;
|
||||
continue;
|
||||
} else if (c.match(/\W/) && invar.length) {
|
||||
// TODO: Should check for possible spaces before dot
|
||||
if (chars[invarPos - 1] !== "." && RESERVED_WORDS.indexOf(invar) < 0) {
|
||||
invar = WORD_REPLACEMENT[invar] || "context['" + invar + "']";
|
||||
}
|
||||
r += invar;
|
||||
invar = "";
|
||||
} else if (invar.length) {
|
||||
invar += c;
|
||||
continue;
|
||||
}
|
||||
r += c;
|
||||
}
|
||||
const result = r.slice(0, -1);
|
||||
this.exprCache[e] = result;
|
||||
return result;
|
||||
}
|
||||
}
|
||||
|
||||
//------------------------------------------------------------------------------
|
||||
// QWeb Directives
|
||||
//------------------------------------------------------------------------------
|
||||
|
||||
interface CompilationInfo {
|
||||
nodeID?: number;
|
||||
node: Element;
|
||||
qweb: QWeb;
|
||||
ctx: Context;
|
||||
fullName: string;
|
||||
value: string;
|
||||
}
|
||||
|
||||
export interface Directive {
|
||||
name: string;
|
||||
priority: number;
|
||||
// if return true, then directive is fully applied and there is no need to
|
||||
// keep processing node. Otherwise, we keep going.
|
||||
atNodeEncounter?(info: CompilationInfo): boolean;
|
||||
atNodeCreation?(info: CompilationInfo): void;
|
||||
finalize?(info: CompilationInfo): void;
|
||||
}
|
||||
|
||||
function compileValueNode(value: any, node: Element, qweb: QWeb, ctx: Context) {
|
||||
if (value === "0" && ctx.caller) {
|
||||
qweb._compileNode(ctx.caller, ctx);
|
||||
return;
|
||||
}
|
||||
|
||||
if (typeof value === "string") {
|
||||
const exprID = ctx.generateID();
|
||||
ctx.addLine(`let e${exprID} = ${qweb._formatExpression(value)};`);
|
||||
ctx.addIf(`e${exprID} || e${exprID} === 0`);
|
||||
let text = `e${exprID}`;
|
||||
|
||||
if (!ctx.parentNode) {
|
||||
throw new Error("Should not have a text node without a parent");
|
||||
}
|
||||
if (ctx.escaping) {
|
||||
ctx.addLine(`c${ctx.parentNode}.push({text: ${text}});`);
|
||||
} else {
|
||||
let fragID = ctx.generateID();
|
||||
ctx.addLine(`let frag${fragID} = this.utils.getFragment(e${exprID})`);
|
||||
let tempNodeID = ctx.generateID();
|
||||
ctx.addLine(`let p${tempNodeID} = {hook: {`);
|
||||
ctx.addLine(
|
||||
` insert: n => n.elm.parentNode.replaceChild(frag${fragID}, n.elm),`
|
||||
);
|
||||
ctx.addLine(`}};`);
|
||||
ctx.addLine(`let vn${tempNodeID} = h('div', p${tempNodeID})`);
|
||||
ctx.addLine(`c${ctx.parentNode}.push(vn${tempNodeID});`);
|
||||
}
|
||||
if (node.childNodes.length) {
|
||||
ctx.addElse();
|
||||
qweb._compileChildren(node, ctx);
|
||||
}
|
||||
ctx.closeIf();
|
||||
return;
|
||||
}
|
||||
if (value instanceof NodeList) {
|
||||
for (let node of Array.from(value)) {
|
||||
qweb._compileNode(<ChildNode>node, ctx);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
const escDirective: Directive = {
|
||||
name: "esc",
|
||||
priority: 70,
|
||||
atNodeEncounter({ node, qweb, ctx }): boolean {
|
||||
if (node.nodeName !== "t") {
|
||||
let nodeID = qweb._compileGenericNode(node, ctx);
|
||||
ctx = ctx.withParent(nodeID);
|
||||
}
|
||||
let value = ctx.getValue(node.getAttribute("t-esc")!);
|
||||
compileValueNode(value, node, qweb, ctx.withEscaping());
|
||||
return true;
|
||||
}
|
||||
};
|
||||
|
||||
const rawDirective: Directive = {
|
||||
name: "raw",
|
||||
priority: 80,
|
||||
atNodeEncounter({ node, qweb, ctx }): boolean {
|
||||
if (node.nodeName !== "t") {
|
||||
let nodeID = qweb._compileGenericNode(node, ctx);
|
||||
ctx = ctx.withParent(nodeID);
|
||||
}
|
||||
let value = ctx.getValue(node.getAttribute("t-raw")!);
|
||||
compileValueNode(value, node, qweb, ctx);
|
||||
return true;
|
||||
}
|
||||
};
|
||||
|
||||
const setDirective: Directive = {
|
||||
name: "set",
|
||||
priority: 60,
|
||||
atNodeEncounter({ node, ctx }): boolean {
|
||||
const variable = node.getAttribute("t-set")!;
|
||||
let value = node.getAttribute("t-value")!;
|
||||
if (value) {
|
||||
ctx.variables[variable] = value;
|
||||
} else {
|
||||
ctx.variables[variable] = node.childNodes;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
};
|
||||
|
||||
const ifDirective: Directive = {
|
||||
name: "if",
|
||||
priority: 20,
|
||||
atNodeEncounter({ node, qweb, ctx }): boolean {
|
||||
let cond = ctx.getValue(node.getAttribute("t-if")!);
|
||||
ctx.addIf(`${qweb._formatExpression(cond)}`);
|
||||
return false;
|
||||
},
|
||||
finalize({ ctx }) {
|
||||
ctx.closeIf();
|
||||
}
|
||||
};
|
||||
|
||||
const elifDirective: Directive = {
|
||||
name: "elif",
|
||||
priority: 30,
|
||||
atNodeEncounter({ node, qweb, ctx }): boolean {
|
||||
let cond = ctx.getValue(node.getAttribute("t-elif")!);
|
||||
ctx.addLine(`else if (${qweb._formatExpression(cond)}) {`);
|
||||
ctx.indent();
|
||||
return false;
|
||||
},
|
||||
finalize({ ctx }) {
|
||||
ctx.closeIf();
|
||||
}
|
||||
};
|
||||
|
||||
const elseDirective: Directive = {
|
||||
name: "else",
|
||||
priority: 40,
|
||||
atNodeEncounter({ ctx }): boolean {
|
||||
ctx.addLine(`else {`);
|
||||
ctx.indent();
|
||||
return false;
|
||||
},
|
||||
finalize({ ctx }) {
|
||||
ctx.closeIf();
|
||||
}
|
||||
};
|
||||
|
||||
const callDirective: Directive = {
|
||||
name: "call",
|
||||
priority: 50,
|
||||
atNodeEncounter({ node, qweb, ctx }): boolean {
|
||||
if (node.nodeName !== "t") {
|
||||
throw new Error("Invalid tag for t-call directive (should be 't')");
|
||||
}
|
||||
const subTemplate = node.getAttribute("t-call")!;
|
||||
const nodeTemplate = qweb.processedTemplates[subTemplate];
|
||||
if (!nodeTemplate) {
|
||||
throw new Error(`Cannot find template "${subTemplate}" (t-call)`);
|
||||
}
|
||||
const nodeCopy = node.cloneNode(true) as Element;
|
||||
nodeCopy.removeAttribute("t-call");
|
||||
|
||||
// extract variables from nodecopy
|
||||
const tempCtx = new Context();
|
||||
qweb._compileNode(nodeCopy, tempCtx);
|
||||
const vars = Object.assign({}, ctx.variables, tempCtx.variables);
|
||||
const subCtx = ctx.withCaller(nodeCopy).withVariables(vars);
|
||||
|
||||
qweb._compileNode(nodeTemplate, subCtx);
|
||||
return true;
|
||||
}
|
||||
};
|
||||
|
||||
const forEachDirective: Directive = {
|
||||
name: "foreach",
|
||||
priority: 10,
|
||||
atNodeEncounter({ node, qweb, ctx }): boolean {
|
||||
ctx.rootContext.shouldProtectContext = true;
|
||||
ctx = ctx.withInLoop();
|
||||
const elems = node.getAttribute("t-foreach")!;
|
||||
const name = node.getAttribute("t-as")!;
|
||||
let arrayID = ctx.generateID();
|
||||
ctx.addLine(`let _${arrayID} = ${qweb._formatExpression(elems)};`);
|
||||
ctx.addLine(
|
||||
`if (!_${arrayID}) { throw new Error('QWeb error: Invalid loop expression')}`
|
||||
);
|
||||
ctx.addLine(
|
||||
`if (typeof _${arrayID} === 'number') { _${arrayID} = Array.from(Array(_${arrayID}).keys())}`
|
||||
);
|
||||
let keysID = ctx.generateID();
|
||||
ctx.addLine(
|
||||
`let _${keysID} = _${arrayID} instanceof Array ? _${arrayID} : Object.keys(_${arrayID});`
|
||||
);
|
||||
let valuesID = ctx.generateID();
|
||||
ctx.addLine(
|
||||
`let _${valuesID} = _${arrayID} instanceof Array ? _${arrayID} : Object.values(_${arrayID});`
|
||||
);
|
||||
ctx.addLine(`for (let i = 0; i < _${keysID}.length; i++) {`);
|
||||
ctx.indent();
|
||||
ctx.addLine(`context.${name}_first = i === 0;`);
|
||||
ctx.addLine(`context.${name}_last = i === _${keysID}.length - 1;`);
|
||||
ctx.addLine(`context.${name}_parity = i % 2 === 0 ? 'even' : 'odd';`);
|
||||
ctx.addLine(`context.${name}_index = i;`);
|
||||
ctx.addLine(`context.${name} = _${keysID}[i];`);
|
||||
ctx.addLine(`context.${name}_value = _${valuesID}[i];`);
|
||||
const nodeCopy = <Element>node.cloneNode(true);
|
||||
nodeCopy.removeAttribute("t-foreach");
|
||||
qweb._compileNode(nodeCopy, ctx);
|
||||
ctx.dedent();
|
||||
ctx.addLine("}");
|
||||
return true;
|
||||
}
|
||||
};
|
||||
|
||||
const onDirective: Directive = {
|
||||
name: "on",
|
||||
priority: 90,
|
||||
atNodeCreation({ ctx, fullName, value, nodeID, qweb }) {
|
||||
ctx.rootContext.shouldDefineOwner = true;
|
||||
const eventName = fullName.slice(5);
|
||||
let extraArgs;
|
||||
let handler = value.replace(/\(.*\)/, function(args) {
|
||||
extraArgs = args.slice(1, -1);
|
||||
return "";
|
||||
});
|
||||
if (extraArgs) {
|
||||
ctx.addLine(
|
||||
`p${nodeID}.on['${eventName}'] = context['${handler}'].bind(owner, ${qweb._formatExpression(
|
||||
extraArgs
|
||||
)});`
|
||||
);
|
||||
} else {
|
||||
ctx.addLine(
|
||||
`extra.handlers['${eventName}' + ${nodeID}] = extra.handlers['${eventName}' + ${nodeID}] || context['${handler}'].bind(owner);`
|
||||
);
|
||||
ctx.addLine(
|
||||
`p${nodeID}.on['${eventName}'] = extra.handlers['${eventName}' + ${nodeID}];`
|
||||
);
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
const refDirective: Directive = {
|
||||
name: "ref",
|
||||
priority: 95,
|
||||
atNodeCreation({ ctx, node, nodeID }) {
|
||||
let ref = node.getAttribute("t-ref");
|
||||
ctx.addLine(`p${ctx.parentNode}.hook = {
|
||||
create: (_, n) => context.refs['${ref}'] = n.elm,
|
||||
};`);
|
||||
}
|
||||
};
|
||||
|
||||
const widgetDirective: Directive = {
|
||||
name: "widget",
|
||||
priority: 100,
|
||||
atNodeEncounter({ ctx, value, node, qweb }): boolean {
|
||||
ctx.addLine("//WIDGET");
|
||||
ctx.rootContext.shouldDefineOwner = true;
|
||||
let props = node.getAttribute("t-props");
|
||||
let keepAlive = node.getAttribute("t-keep-alive") ? true : false;
|
||||
|
||||
// t-on- events...
|
||||
const events: [string, string][] = [];
|
||||
const attributes = (<Element>node).attributes;
|
||||
for (let i = 0; i < attributes.length; i++) {
|
||||
const name = attributes[i].name;
|
||||
if (name.startsWith("t-on-")) {
|
||||
events.push([name.slice(5), attributes[i].textContent!]);
|
||||
}
|
||||
}
|
||||
|
||||
let key = node.getAttribute("t-key");
|
||||
if (key) {
|
||||
key = `"${key}"`;
|
||||
} else {
|
||||
key = node.getAttribute("t-att-key");
|
||||
if (key) {
|
||||
key = qweb._formatExpression(key);
|
||||
}
|
||||
}
|
||||
if (props) {
|
||||
props = props.trim();
|
||||
if (props[0] === "{" && props[props.length - 1] === "}") {
|
||||
const innerProp = props
|
||||
.slice(1, -1)
|
||||
.split(",")
|
||||
.map(p => {
|
||||
let [key, val] = p.split(":");
|
||||
return `${key}: ${qweb._formatExpression(val)}`;
|
||||
})
|
||||
.join(",");
|
||||
props = "{" + innerProp + "}";
|
||||
} else {
|
||||
props = qweb._formatExpression(props);
|
||||
}
|
||||
}
|
||||
let dummyID = ctx.generateID();
|
||||
let defID = ctx.generateID();
|
||||
let widgetID = ctx.generateID();
|
||||
let keyID = key && ctx.generateID();
|
||||
if (key) {
|
||||
// we bind a variable to the key (could be a complex expression, so we
|
||||
// want to evaluate it only once)
|
||||
ctx.addLine(`let key${keyID} = ${key};`);
|
||||
}
|
||||
ctx.addLine(`let _${dummyID}_index = c${ctx.parentNode}.length;`);
|
||||
ctx.addLine(`c${ctx.parentNode}.push(null);`);
|
||||
ctx.addLine(`let def${defID};`);
|
||||
let templateID = key
|
||||
? `key${keyID}`
|
||||
: ctx.inLoop
|
||||
? `String(-${widgetID} - i)`
|
||||
: String(widgetID);
|
||||
ctx.addLine(
|
||||
`let w${widgetID} = ${templateID} in context.__widget__.cmap ? context.__widget__.children[context.__widget__.cmap[${templateID}]] : false;`
|
||||
);
|
||||
ctx.addLine(`let props${widgetID} = ${props};`);
|
||||
ctx.addLine(`let isNew${widgetID} = !w${widgetID};`);
|
||||
|
||||
// check if we can reuse current rendering promise
|
||||
ctx.addIf(`w${widgetID} && w${widgetID}.__widget__.renderPromise`);
|
||||
ctx.addIf(`w${widgetID}.__widget__.isStarted`);
|
||||
ctx.addLine(`def${defID} = w${widgetID}.updateProps(props${widgetID});`);
|
||||
ctx.addElse();
|
||||
ctx.addLine(`isNew${widgetID} = true`);
|
||||
ctx.addIf(`props${widgetID} === w${widgetID}.__widget__.renderProps`);
|
||||
ctx.addLine(`def${defID} = w${widgetID}.__widget__.renderPromise;`);
|
||||
ctx.addElse();
|
||||
ctx.addLine(`w${widgetID}.destroy();`);
|
||||
ctx.addLine(`w${widgetID} = false`);
|
||||
ctx.closeIf();
|
||||
ctx.closeIf();
|
||||
ctx.closeIf();
|
||||
|
||||
ctx.addIf(`!def${defID}`);
|
||||
ctx.addIf(`w${widgetID}`);
|
||||
ctx.addLine(`def${defID} = w${widgetID}.updateProps(props${widgetID});`);
|
||||
ctx.addElse();
|
||||
ctx.addLine(
|
||||
`w${widgetID} = new context.widgets['${value}'](owner, props${widgetID});`
|
||||
);
|
||||
ctx.addLine(
|
||||
`context.__widget__.cmap[${templateID}] = w${widgetID}.__widget__.id;`
|
||||
);
|
||||
for (let [event, method] of events) {
|
||||
ctx.addLine(`w${widgetID}.on('${event}', owner, owner['${method}'])`);
|
||||
}
|
||||
let ref = node.getAttribute("t-ref");
|
||||
if (ref) {
|
||||
ctx.addLine(`context.refs['${ref}'] = w${widgetID};`);
|
||||
}
|
||||
|
||||
ctx.addLine(`def${defID} = w${widgetID}._start();`);
|
||||
ctx.closeIf();
|
||||
ctx.closeIf();
|
||||
|
||||
ctx.addIf(`isNew${widgetID}`);
|
||||
ctx.addLine(
|
||||
`def${defID} = def${defID}.then(vnode=>{let pvnode=h(vnode.sel, {key: ${templateID}});c${
|
||||
ctx.parentNode
|
||||
}[_${dummyID}_index]=pvnode;pvnode.data.hook = {insert(vn){let nvn=w${widgetID}._mount(vnode, vn.elm);pvnode.elm=nvn.elm},remove(){w${widgetID}.${
|
||||
keepAlive ? "detach" : "destroy"
|
||||
}()}}; w${widgetID}.__widget__.pvnode = pvnode;});`
|
||||
);
|
||||
ctx.addElse();
|
||||
ctx.addLine(
|
||||
`def${defID} = def${defID}.then(()=>{if (w${widgetID}.__widget__.isDestroyed) {return};let vnode;if (!w${widgetID}.__widget__.vnode){vnode=w${widgetID}.__widget__.pvnode} else { vnode=h(w${widgetID}.__widget__.vnode.sel, {key: ${templateID}});vnode.elm=w${widgetID}.el;vnode.data.hook = {insert(a){a.elm.parentNode.replaceChild(w${widgetID}.el,a.elm);a.elm=w${widgetID}.el;w${widgetID}.__mount();},remove(){w${widgetID}.${
|
||||
keepAlive ? "detach" : "destroy"
|
||||
}()}}}c${ctx.parentNode}[_${dummyID}_index]=vnode;});`
|
||||
);
|
||||
ctx.closeIf();
|
||||
|
||||
ctx.addLine(`extra.promises.push(def${defID});`);
|
||||
|
||||
if (node.getAttribute("t-if") || node.getAttribute("t-else")) {
|
||||
ctx.closeIf();
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
};
|
||||
Reference in New Issue
Block a user