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[IMP] support modifiers with t-on directive

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Supported modifiers are stop, prevent and self.

Closes #115.
This commit is contained in:
Aaron Bohy
2019-05-23 11:26:03 +02:00
committed by Géry Debongnie
parent 13b31458da
commit 8a32d823cd
4 changed files with 321 additions and 21 deletions
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src/qweb_extensions.ts
+35 -12
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@@ -16,33 +16,56 @@ import { QWeb, UTILS } from "./qweb_core";
//------------------------------------------------------------------------------
// t-on
//------------------------------------------------------------------------------
// these are pieces of code that will be injected into the event handler if
// modifiers are specified
const MODS_CODE = {
prevent: "e.preventDefault();",
self: "if (e.target !== this.elm) {return}",
stop: "e.stopPropagation();"
};
QWeb.addDirective({
name: "on",
priority: 90,
atNodeCreation({ ctx, fullName, value, nodeID }) {
ctx.rootContext.shouldDefineOwner = true;
const eventName = fullName.slice(5);
const [eventName, ...mods] = fullName.slice(5).split(".");
if (!eventName) {
throw new Error("Missing event name with t-on directive");
}
let extraArgs;
let handler = value.replace(/\(.*\)/, function(args) {
let handlerName = value.replace(/\(.*\)/, function(args) {
extraArgs = args.slice(1, -1);
return "";
});
let error = `(function () {throw new Error('Missing handler \\'' + '${handler}' + \`\\' when evaluating template '${ctx.templateName.replace(
/`/g,
"'"
)}'\`)})()`;
ctx.addIf(`!context['${handlerName}']`);
ctx.addLine(
`throw new Error('Missing handler \\'' + '${handlerName}' + \`\\' when evaluating template '${ctx.templateName.replace(
/`/g,
"'"
)}'\`)`
);
ctx.closeIf();
let params = extraArgs
? `owner, ${ctx.formatExpression(extraArgs)}`
: "owner";
let handler;
if (mods.length > 0) {
handler = `function (e) {`;
handler += mods
.map(function(mod) {
return MODS_CODE[mod];
})
.join("");
handler += `context['${handlerName}'].call(${params}, e);}`;
} else {
handler = `context['${handlerName}'].bind(${params})`;
}
if (extraArgs) {
ctx.addLine(
`p${nodeID}.on['${eventName}'] = (context['${handler}'] || ${error}).bind(owner, ${ctx.formatExpression(
extraArgs
)});`
);
ctx.addLine(`p${nodeID}.on['${eventName}'] = ${handler};`);
} else {
ctx.addLine(
`extra.handlers['${eventName}' + ${nodeID}] = extra.handlers['${eventName}' + ${nodeID}] || (context['${handler}'] || ${error}).bind(owner);`
`extra.handlers['${eventName}' + ${nodeID}] = extra.handlers['${eventName}' + ${nodeID}] || ${handler};`
);
ctx.addLine(
`p${nodeID}.on['${eventName}'] = extra.handlers['${eventName}' + ${nodeID}];`