mirror of
https://github.com/odoo/owl.git
synced 2025-10-06 19:59:41 +07:00
Géry Debongnie
349 lines
11 KiB
TypeScript
349 lines
11 KiB
TypeScript
import { CompilationContext } from "./compilation_context";
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import { QWebExprVar } from "./expression_parser";
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import { QWeb } from "./qweb";
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import { htmlToVDOM } from "../vdom/html_to_vdom";
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/**
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* Owl QWeb Directives
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*
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* This file contains the implementation of most standard QWeb directives:
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* - t-esc
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* - t-raw
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* - t-set/t-value
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* - t-if/t-elif/t-else
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* - t-call
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* - t-foreach/t-as
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* - t-debug
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* - t-log
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*/
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//------------------------------------------------------------------------------
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// t-esc and t-raw
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//------------------------------------------------------------------------------
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QWeb.utils.getFragment = function(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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QWeb.utils.htmlToVDOM = htmlToVDOM;
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function compileValueNode(value: any, node: Element, qweb: QWeb, ctx: CompilationContext) {
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if (value === "0" && ctx.caller) {
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qweb._compileNode(ctx.caller, ctx);
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return;
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}
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if (value.xml instanceof NodeList) {
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for (let node of Array.from(value.xml)) {
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qweb._compileNode(<ChildNode>node, ctx);
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}
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return;
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}
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let exprID: string;
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if (typeof value === "string") {
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exprID = `_${ctx.generateID()}`;
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ctx.addLine(`var ${exprID} = ${ctx.formatExpression(value)};`);
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} else {
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exprID = value.id;
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}
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ctx.addIf(`${exprID} || ${exprID} === 0`);
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if (ctx.escaping) {
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if (ctx.parentTextNode) {
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ctx.addLine(`vn${ctx.parentTextNode}.text += ${exprID};`);
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} else if (ctx.parentNode) {
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ctx.addLine(`c${ctx.parentNode}.push({text: ${exprID}});`);
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} else {
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let nodeID = ctx.generateID();
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ctx.rootContext.rootNode = nodeID;
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ctx.rootContext.parentTextNode = nodeID;
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ctx.addLine(`var vn${nodeID} = {text: ${exprID}};`);
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if (ctx.rootContext.shouldDefineResult) {
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ctx.addLine(`result = vn${nodeID}`);
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}
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}
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} else {
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ctx.rootContext.shouldDefineUtils = true;
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ctx.addLine(`c${ctx.parentNode}.push(...utils.htmlToVDOM(${exprID}));`);
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}
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if (node.childNodes.length) {
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ctx.addElse();
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qweb._compileChildren(node, ctx);
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}
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ctx.closeIf();
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}
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QWeb.addDirective({
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name: "esc",
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priority: 70,
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atNodeEncounter({ node, qweb, ctx }): boolean {
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let value = ctx.getValue(node.getAttribute("t-esc")!);
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compileValueNode(value, node, qweb, ctx.subContext("escaping", true));
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return true;
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}
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});
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QWeb.addDirective({
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name: "raw",
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priority: 80,
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atNodeEncounter({ node, qweb, ctx }): boolean {
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let value = ctx.getValue(node.getAttribute("t-raw")!);
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compileValueNode(value, node, qweb, ctx);
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return true;
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}
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});
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//------------------------------------------------------------------------------
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// t-set
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//------------------------------------------------------------------------------
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QWeb.addDirective({
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name: "set",
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extraNames: ["value"],
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priority: 60,
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atNodeEncounter({ node, ctx }): boolean {
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const variable = node.getAttribute("t-set")!;
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let value = node.getAttribute("t-value")!;
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if (value) {
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const formattedValue = ctx.formatExpression(value);
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if (ctx.variables.hasOwnProperty(variable)) {
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ctx.addLine(`${(<QWebExprVar>ctx.variables[variable]).id} = ${formattedValue}`);
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} else {
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const varName = `_${ctx.generateID()}`;
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ctx.addLine(`var ${varName} = ${formattedValue};`);
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ctx.variables[variable] = {
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id: varName,
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expr: formattedValue
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};
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}
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} else {
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ctx.variables[variable] = {
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xml: node.childNodes
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};
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}
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return true;
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}
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});
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//------------------------------------------------------------------------------
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// t-if, t-elif, t-else
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//------------------------------------------------------------------------------
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QWeb.addDirective({
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name: "if",
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priority: 20,
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atNodeEncounter({ node, ctx }): boolean {
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let cond = ctx.getValue(node.getAttribute("t-if")!);
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ctx.addIf(`${ctx.formatExpression(cond)}`);
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return false;
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},
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finalize({ ctx }) {
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ctx.closeIf();
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}
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});
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QWeb.addDirective({
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name: "elif",
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priority: 30,
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atNodeEncounter({ node, ctx }): boolean {
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let cond = ctx.getValue(node.getAttribute("t-elif")!);
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ctx.addLine(`else if (${ctx.formatExpression(cond)}) {`);
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ctx.indent();
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return false;
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},
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finalize({ ctx }) {
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ctx.closeIf();
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}
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});
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QWeb.addDirective({
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name: "else",
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priority: 40,
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atNodeEncounter({ ctx }): boolean {
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ctx.addLine(`else {`);
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ctx.indent();
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return false;
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},
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finalize({ ctx }) {
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ctx.closeIf();
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}
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});
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//------------------------------------------------------------------------------
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// t-call
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//------------------------------------------------------------------------------
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QWeb.addDirective({
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name: "call",
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priority: 50,
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atNodeEncounter({ node, qweb, ctx }): boolean {
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if (node.nodeName !== "t") {
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throw new Error("Invalid tag for t-call directive (should be 't')");
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}
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const subTemplate = node.getAttribute("t-call")!;
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const nodeTemplate = qweb.templates[subTemplate];
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if (!nodeTemplate) {
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throw new Error(`Cannot find template "${subTemplate}" (t-call)`);
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}
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const nodeCopy = node.cloneNode(true) as Element;
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nodeCopy.removeAttribute("t-call");
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// extract variables from nodecopy
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const tempCtx = new CompilationContext();
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tempCtx.nextID = ctx.rootContext.nextID;
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tempCtx.allowMultipleRoots = true;
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qweb._compileNode(nodeCopy, tempCtx);
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const vars = Object.assign({}, ctx.variables, tempCtx.variables);
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ctx.rootContext.nextID = tempCtx.nextID;
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const templateMap = Object.create(ctx.templates);
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// open new scope, if necessary
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const hasNewVariables = Object.keys(tempCtx.variables).length > 0;
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// compile sub template
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let subCtx = ctx.subContext("caller", nodeCopy).subContext("variables", Object.create(vars));
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subCtx = subCtx.subContext("templates", templateMap);
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if (templateMap[subTemplate]) {
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// OUCH, IT IS A RECURSIVE TEMPLATE SITUATION...
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// This is a tricky situation... We obviously cannot inline the compiled
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// template. So, what we need to do is to compile it, and make sure we
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// properly transfer everything from the current scope to the sub template.
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ctx.rootContext.shouldTrackScope = true;
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ctx.rootContext.shouldDefineOwner = true;
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let subTemplateName;
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if (ctx.hasParentWidget) {
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subTemplateName = ctx.templateName;
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} else {
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subTemplateName = `__${ctx.generateID()}`;
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subCtx.variables = {};
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let id = 0;
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for (let v in vars) {
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subCtx.variables[v] = vars[v];
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(vars[v] as any).id = `_v${id++}`;
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}
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const subTemplateFn = qweb._compile(subTemplateName, nodeTemplate.elem, subCtx);
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qweb.recursiveFns[subTemplateName] = subTemplateFn;
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}
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let varCode = `{}`;
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if (Object.keys(vars).length) {
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let id = 0;
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const content = Object.values(vars)
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.map((v: any) => `_v${id++}: ${v.expr}`)
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.join(",");
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varCode = `{${content}}`;
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}
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ctx.addLine(
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`this.recursiveFns['${subTemplateName}'].call(this, context, Object.assign({}, extra, {parentNode: c${ctx.parentNode}, fiber: {vars: ${varCode}, scope}}));`
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);
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return true;
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}
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templateMap[subTemplate] = true;
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if (hasNewVariables) {
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ctx.addLine("{");
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ctx.indent();
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// add new variables, if any
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for (let key in tempCtx.variables) {
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const v = tempCtx.variables[key];
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if ((<QWebExprVar>v).expr) {
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ctx.addLine(`let ${(<QWebExprVar>v).id} = ${(<QWebExprVar>v).expr};`);
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}
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// todo: handle XML variables...
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}
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}
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qweb._compileNode(nodeTemplate.elem, subCtx);
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// close new scope
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if (hasNewVariables) {
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ctx.dedent();
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ctx.addLine("}");
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}
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if (node.hasAttribute("t-if") || node.hasAttribute("t-else") || node.hasAttribute("t-elif")) {
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ctx.closeIf();
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}
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return true;
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}
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});
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//------------------------------------------------------------------------------
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// t-foreach
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//------------------------------------------------------------------------------
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QWeb.addDirective({
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name: "foreach",
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extraNames: ["as"],
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priority: 10,
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atNodeEncounter({ node, qweb, ctx }): boolean {
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ctx.rootContext.shouldProtectContext = true;
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ctx = ctx.subContext("inLoop", true);
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const elems = node.getAttribute("t-foreach")!;
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const name = node.getAttribute("t-as")!;
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let arrayID = ctx.generateID();
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ctx.addLine(`var _${arrayID} = ${ctx.formatExpression(elems)};`);
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ctx.addLine(`if (!_${arrayID}) { throw new Error('QWeb error: Invalid loop expression')}`);
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let keysID = ctx.generateID();
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let valuesID = ctx.generateID();
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ctx.addLine(`var _${keysID} = _${valuesID} = _${arrayID};`);
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ctx.addIf(`!(_${arrayID} instanceof Array)`);
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ctx.addLine(`_${keysID} = Object.keys(_${arrayID});`);
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ctx.addLine(`_${valuesID} = Object.values(_${arrayID});`);
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ctx.closeIf();
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ctx.addLine(`var _length${keysID} = _${keysID}.length;`);
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ctx.addLine(`for (let i = 0; i < _length${keysID}; i++) {`);
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ctx.indent();
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ctx.addToScope(name + "_first", "i === 0");
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ctx.addToScope(name + "_last", `i === _length${keysID} - 1`);
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ctx.addToScope(name + "_index", "i");
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ctx.addToScope(name, `_${keysID}[i]`);
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ctx.addToScope(name + "_value", `_${valuesID}[i]`);
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const nodeCopy = <Element>node.cloneNode(true);
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let shouldWarn = nodeCopy.tagName !== "t" && !nodeCopy.hasAttribute("t-key");
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if (!shouldWarn && node.tagName === "t") {
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if (node.hasAttribute("t-component") && !node.hasAttribute("t-key")) {
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shouldWarn = true;
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}
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if (
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!shouldWarn &&
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node.children.length === 1 &&
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node.children[0].tagName !== "t" &&
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!node.children[0].hasAttribute("t-key")
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) {
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shouldWarn = true;
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}
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}
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if (shouldWarn) {
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console.warn(
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`Directive t-foreach should always be used with a t-key! (in template: '${ctx.templateName}')`
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);
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}
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nodeCopy.removeAttribute("t-foreach");
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qweb._compileNode(nodeCopy, ctx);
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ctx.dedent();
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ctx.addLine("}");
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return true;
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}
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});
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//------------------------------------------------------------------------------
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// t-debug
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//------------------------------------------------------------------------------
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QWeb.addDirective({
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name: "debug",
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priority: 1,
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atNodeEncounter({ ctx }) {
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ctx.addLine("debugger;");
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}
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});
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//------------------------------------------------------------------------------
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// t-log
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//------------------------------------------------------------------------------
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QWeb.addDirective({
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name: "log",
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priority: 1,
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atNodeEncounter({ ctx, value }) {
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const expr = ctx.formatExpression(value);
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ctx.addLine(`console.log(${expr})`);
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}
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});
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