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[IMP] hooks: add onWillPatch and onPatched

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This commit also changes the behaviour of willPatch and patched: they no
longer transfer data from one to the other, because it can be done
cleanly by hooks and a closure.

closes #307
This commit is contained in:
Géry Debongnie
2019-09-29 16:47:06 +02:00
parent e82ed7dc8c
commit 367725d194
6 changed files with 269 additions and 51 deletions
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src/hooks.ts
+25 -13
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@@ -40,23 +40,35 @@ export function onMounted(cb) {
component.__owl__.mountedHandlers[`h${nextID++}`] = cb;
}
function makeLifecycleHook(method: string, reverse: boolean = false) {
return function(cb) {
const component: Component<any, any> = Component._current;
if (component.__owl__[method]) {
const current = component.__owl__[method];
if (reverse) {
component.__owl__[method] = function() {
current.call(component);
cb.call(component);
};
} else {
component.__owl__[method] = function() {
cb.call(component);
current.call(component);
};
}
} else {
component.__owl__[method] = cb;
}
};
}
/**
* willUnmount hook. The callback will be called when the current component is
* willUnmounted. Note that the component mounted method is called last.
*/
export function onWillUnmount(cb) {
const component: Component<any, any> = Component._current;
if (component.__owl__.willUnmountCB) {
const current = component.__owl__.willUnmountCB;
component.__owl__.willUnmountCB = function() {
cb.call(component);
current.call(component);
};
} else {
component.__owl__.willUnmountCB = cb;
}
}
export const onWillUnmount = makeLifecycleHook("willUnmountCB");
export const onWillPatch = makeLifecycleHook("willPatchCB");
export const onPatched = makeLifecycleHook("patchedCB", true);
/**
* useRef hook
*