mirror of
https://github.com/odoo/owl.git
synced 2025-10-06 19:59:41 +07:00
[REF] owl: reorganize src code in sub files
This commit is contained in:
Géry Debongnie
@@ -0,0 +1,657 @@
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import { Observer } from "../core/observer";
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import { CompiledTemplate, QWeb } from "../qweb/index";
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import { h, patch, VNode } from "../vdom/index";
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import "./directive";
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import "./props_validation";
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/**
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* Owl Component System
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*
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* This file introduces a declarative and composable component system. It
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* contains:
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*
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* - the Env interface (generic type for the environment)
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* - the Meta interface (the owl specific metadata attached to a component)
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* - the Component class
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*/
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//------------------------------------------------------------------------------
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// Types/helpers
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//------------------------------------------------------------------------------
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/**
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* An Env (environment) is an object that will be (mostly) shared between all
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* components of an Owl application. It is the location which should contain
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* the qweb instance necessary to render all components.
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*
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* Note that it is totally fine to extend the environment with application
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* specific keys/objects/whatever. For example, a key `isMobile` (to declare
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* if we are in "mobile" mode), or a shared bus could be useful.
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*/
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export interface Env {
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qweb: QWeb;
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}
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/**
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* This is mostly an internal detail of implementation. The Meta interface is
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* useful to typecheck and describe the internal keys used by Owl to manage the
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* component tree.
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*/
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export interface Meta<T extends Env, Props> {
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readonly id: number;
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vnode: VNode | null;
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isMounted: boolean;
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isDestroyed: boolean;
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parent: Component<T, any, any> | null;
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children: { [key: number]: Component<T, any, any> };
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// children mapping: from templateID to componentID
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// should it be a map number => Component?
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cmap: { [key: number]: number };
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renderId: number;
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renderProps: Props | null;
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renderPromise: Promise<VNode> | null;
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boundHandlers: { [key: number]: any };
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observer?: Observer;
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render?: CompiledTemplate;
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mountedHandlers: { [key: number]: Function };
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classObj?: { [key: string]: boolean };
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}
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// If a component does not define explicitely a template
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// key, it needs to find a template with its name (or a parent's). This is
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// qweb dependant, so we need a place to store this information indexed by
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// qweb instances.
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const TEMPLATE_MAP: { [key: number]: { [name: string]: string } } = {};
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//------------------------------------------------------------------------------
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// Component
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//------------------------------------------------------------------------------
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let nextId = 1;
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export class Component<T extends Env, Props extends {}, State extends {}> {
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readonly __owl__: Meta<Env, Props>;
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template?: string;
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/**
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* The `el` is the root element of the component. Note that it could be null:
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* this is the case if the component is not mounted yet, or is destroyed.
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*/
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get el(): HTMLElement | null {
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return this.__owl__.vnode ? (<any>this).__owl__.vnode.elm : null;
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}
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env: T;
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state?: State;
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props: Props;
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// type of props is not easily representable in typescript...
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static props?: any;
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static defaultProps?: any;
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refs: {
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[key: string]: Component<T, any, any> | HTMLElement | undefined;
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} = {};
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//--------------------------------------------------------------------------
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// Lifecycle
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//--------------------------------------------------------------------------
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/**
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* Creates an instance of Component.
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*
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* The root component of a component tree needs an environment:
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*
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* ```javascript
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* const root = new RootComponent(env, props);
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* ```
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*
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* Every other component simply needs a reference to its parent:
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*
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* ```javascript
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* const child = new SomeComponent(parent, props);
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* ```
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*
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* Note that most of the time, only the root component needs to be created by
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* hand. Other components should be created automatically by the framework (with
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* the t-component directive in a template)
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*/
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constructor(parent: Component<T, any, any> | T, props?: Props) {
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const defaultProps = (<any>this.constructor).defaultProps;
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if (defaultProps) {
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props = this.__applyDefaultProps(props, defaultProps);
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}
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// is this a good idea?
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// Pro: if props is empty, we can create easily a component
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// Con: this is not really safe
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// Pro: but creating component (by a template) is always unsafe anyway
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this.props = <Props>props || <Props>{};
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let id: number = nextId++;
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let p: Component<T, any, any> | null = null;
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if (parent instanceof Component) {
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p = parent;
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this.env = parent.env;
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parent.__owl__.children[id] = this;
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} else {
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this.env = parent;
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if (QWeb.dev) {
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// we only validate props for root widgets here. "Regular" widget
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// props are validated by the t-component directive
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QWeb.utils.validateProps(this.constructor, this.props);
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}
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this.env.qweb.on("update", this, () => {
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if (this.__owl__.isMounted) {
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this.render(true);
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}
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if (this.__owl__.isDestroyed) {
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// this is unlikely to happen, but if a root widget is destroyed,
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// we want to remove our subscription. The usual way to do that
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// would be to perform some check in the destroy method, but since
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// it is very performance sensitive, and since this is a rare event,
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// we simply do it lazily
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this.env.qweb.off("update", this);
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}
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});
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}
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this.__owl__ = {
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id: id,
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vnode: null,
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isMounted: false,
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isDestroyed: false,
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parent: p,
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children: {},
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cmap: {},
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renderId: 1,
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renderPromise: null,
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renderProps: props || null,
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boundHandlers: {},
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mountedHandlers: {}
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};
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}
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/**
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* willStart is an asynchronous hook that can be implemented to perform some
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* action before the initial rendering of a component.
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*
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* It will be called exactly once before the initial rendering. It is useful
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* in some cases, for example, to load external assets (such as a JS library)
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* before the component is rendered.
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*
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* Note that a slow willStart method will slow down the rendering of the user
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* interface. Therefore, some effort should be made to make this method as
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* fast as possible.
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*
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* Note: this method should not be called manually.
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*/
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async willStart() {}
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/**
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* mounted is a hook that is called each time a component is attached to the
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* DOM. This is a good place to add some listeners, or to interact with the
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* DOM, if the component needs to perform some measure for example.
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*
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* Note: this method should not be called manually.
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*
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* @see willUnmount
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*/
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mounted() {}
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/**
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* The willUpdateProps is an asynchronous hook, called just before new props
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* are set. This is useful if the component needs some asynchronous task
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* performed, depending on the props (for example, assuming that the props are
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* some record Id, fetching the record data).
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*
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* This hook is not called during the first render (but willStart is called
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* and performs a similar job).
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*/
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async willUpdateProps(nextProps: Props) {}
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/**
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* The willPatch hook is called just before the DOM patching process starts.
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* It is not called on the initial render. This is useful to get some
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* information which are in the DOM. For example, the current position of the
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* scrollbar
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*
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* The return value of willPatch will be given to the patched function.
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*/
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willPatch(): any {}
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/**
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* This hook is called whenever a component did actually update its props,
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* state or env.
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*
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* This method is not called on the initial render. It is useful to interact
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* with the DOM (for example, through an external library) whenever the
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* component was updated.
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*
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* Updating the component state in this hook is possible, but not encouraged.
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* One need to be careful, because updates here will cause rerender, which in
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* turn will cause other calls to updated. So, we need to be particularly
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* careful at avoiding endless cycles.
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*
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* The snapshot parameter is the result of the call to willPatch.
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*/
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patched(snapshot: any) {}
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/**
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* willUnmount is a hook that is called each time just before a component is
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* unmounted from the DOM. This is a good place to remove some listeners, for
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* example.
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*
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* Note: this method should not be called manually.
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*
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* @see mounted
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*/
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willUnmount() {}
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/**
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* catchError is a method called whenever some error happens in the rendering or
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* lifecycle hooks of a child.
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*/
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catchError(error: Error): void {}
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//--------------------------------------------------------------------------
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// Public
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//--------------------------------------------------------------------------
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/**
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* Mount the component to a target element.
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*
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* This should only be done if the component was created manually. Components
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* created declaratively in templates are managed by the Owl system.
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*/
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async mount(target: HTMLElement): Promise<void> {
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const vnode = await this.__prepare();
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if (this.__owl__.isDestroyed) {
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// component was destroyed before we get here...
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return;
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}
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this.__patch(vnode);
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target.appendChild(this.el!);
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if (document.body.contains(target)) {
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this.__callMounted();
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}
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}
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unmount() {
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if (this.__owl__.isMounted) {
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this.__callWillUnmount();
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this.el!.remove();
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}
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}
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async render(force: boolean = false, patchQueue?: any[], scope?: any, vars?: any): Promise<void> {
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const __owl__ = this.__owl__;
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if (!__owl__.isMounted) {
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return;
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}
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const shouldPatch: boolean = !patchQueue;
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if (shouldPatch) {
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patchQueue = [];
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}
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const renderVDom = this.__render(force, patchQueue, scope, vars);
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const renderId = __owl__.renderId;
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await renderVDom;
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if (shouldPatch && __owl__.isMounted && renderId === __owl__.renderId) {
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// we only update the vnode and the actual DOM if no other rendering
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// occurred between now and when the render method was initially called.
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this.__applyPatchQueue(<any[]>patchQueue);
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}
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}
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/**
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* Destroy the component. This operation is quite complex:
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* - it recursively destroy all children
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* - call the willUnmount hooks if necessary
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* - remove the dom node from the dom
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*
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* This should only be called manually if you created the component. Most
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* components will be automatically destroyed.
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*/
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destroy() {
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const __owl__ = this.__owl__;
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if (!__owl__.isDestroyed) {
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const el = this.el;
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this.__destroy(__owl__.parent);
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if (el) {
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el.remove();
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}
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}
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}
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/**
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* This method is called by the component system whenever its props are
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* updated. If it returns true, then the component will be rendered.
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* Otherwise, it will skip the rendering (also, its props will not be updated)
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*/
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shouldUpdate(nextProps: Props): boolean {
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return true;
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}
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/**
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* This method is the correct way to update the environment of a component. Doing
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* this will cause a full rerender of the component and its children, so this is
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* an operation that should not be done frequently.
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*
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* A good usecase for updating the environment would be to update some mostly
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* static config keys, such as a boolean to determine if we are in mobile
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* mode or not.
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*/
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async updateEnv(nextEnv: Partial<T>): Promise<void> {
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const __owl__ = this.__owl__;
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if (__owl__.parent && __owl__.parent.env === this.env) {
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this.env = Object.create(this.env);
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}
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Object.assign(this.env, nextEnv);
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if (__owl__.isMounted) {
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await this.render(true);
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}
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}
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/**
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* Emit a custom event of type 'eventType' with the given 'payload' on the
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* component's el, if it exists. However, note that the event will only bubble
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* up to the parent DOM nodes. Thus, it must be called between mounted() and
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* willUnmount().
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*/
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trigger(eventType: string, payload?: any) {
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if (this.el) {
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const ev = new CustomEvent(eventType, {
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bubbles: true,
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cancelable: true,
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detail: payload
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});
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this.el.dispatchEvent(ev);
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}
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}
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//--------------------------------------------------------------------------
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// Private
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//--------------------------------------------------------------------------
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__destroy(parent: Component<any, any, any> | null) {
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const __owl__ = this.__owl__;
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const isMounted = __owl__.isMounted;
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if (isMounted) {
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this.willUnmount();
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__owl__.isMounted = false;
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}
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const children = __owl__.children;
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for (let key in children) {
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children[key].__destroy(this);
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}
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if (parent) {
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let id = __owl__.id;
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delete parent.__owl__.children[id];
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__owl__.parent = null;
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}
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__owl__.isDestroyed = true;
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delete __owl__.vnode;
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}
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__callMounted() {
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const __owl__ = this.__owl__;
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const children = __owl__.children;
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for (let id in children) {
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const comp = children[id];
|
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if (!comp.__owl__.isMounted && this.el!.contains(comp.el)) {
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comp.__callMounted();
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}
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}
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__owl__.isMounted = true;
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const handlers = __owl__.mountedHandlers;
|
||||
for (let key in handlers) {
|
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handlers[key]();
|
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}
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try {
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this.mounted();
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} catch (e) {
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errorHandler(e, this);
|
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}
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}
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__callWillUnmount() {
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this.willUnmount();
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const __owl__ = this.__owl__;
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__owl__.isMounted = false;
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const children = __owl__.children;
|
||||
for (let id in children) {
|
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const comp = children[id];
|
||||
if (comp.__owl__.isMounted) {
|
||||
comp.__callWillUnmount();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
async __updateProps(
|
||||
nextProps: Props,
|
||||
forceUpdate: boolean = false,
|
||||
patchQueue?: any[],
|
||||
scope?: any,
|
||||
vars?: any
|
||||
): Promise<void> {
|
||||
const shouldUpdate = forceUpdate || this.shouldUpdate(nextProps);
|
||||
if (shouldUpdate) {
|
||||
const defaultProps = (<any>this.constructor).defaultProps;
|
||||
if (defaultProps) {
|
||||
nextProps = this.__applyDefaultProps(nextProps, defaultProps);
|
||||
}
|
||||
await this.willUpdateProps(nextProps);
|
||||
this.props = nextProps;
|
||||
await this.render(forceUpdate, patchQueue, scope, vars);
|
||||
}
|
||||
}
|
||||
|
||||
__patch(vnode) {
|
||||
const __owl__ = this.__owl__;
|
||||
__owl__.renderPromise = null;
|
||||
const target = __owl__.vnode || document.createElement(vnode.sel!);
|
||||
if (this.__owl__.classObj) {
|
||||
(<any>vnode).data.class = Object.assign((<any>vnode).data.class || {}, this.__owl__.classObj);
|
||||
}
|
||||
__owl__.vnode = patch(target, vnode);
|
||||
}
|
||||
|
||||
__prepare(scope?: Object, vars?: any): Promise<VNode> {
|
||||
const __owl__ = this.__owl__;
|
||||
__owl__.renderProps = this.props;
|
||||
__owl__.renderPromise = this.__prepareAndRender(scope, vars);
|
||||
return __owl__.renderPromise;
|
||||
}
|
||||
|
||||
async __prepareAndRender(scope?: Object, vars?: any): Promise<VNode> {
|
||||
try {
|
||||
await this.willStart();
|
||||
} catch (e) {
|
||||
errorHandler(e, this);
|
||||
return Promise.resolve(h("div"));
|
||||
}
|
||||
const __owl__ = this.__owl__;
|
||||
if (__owl__.isDestroyed) {
|
||||
return Promise.resolve(h("div"));
|
||||
}
|
||||
const qweb = this.env.qweb;
|
||||
if (!this.template) {
|
||||
let tmap = TEMPLATE_MAP[qweb.id];
|
||||
if (!tmap) {
|
||||
tmap = {};
|
||||
TEMPLATE_MAP[qweb.id] = tmap;
|
||||
}
|
||||
let p = (<any>this).constructor;
|
||||
let name: string = p.name;
|
||||
let template = tmap[name];
|
||||
if (template) {
|
||||
this.template = template;
|
||||
} else {
|
||||
while ((template = p.name) && !(template in qweb.templates) && p !== Component) {
|
||||
p = p.__proto__;
|
||||
}
|
||||
if (p === Component) {
|
||||
throw new Error(`Could not find template for component "${this.constructor.name}"`);
|
||||
} else {
|
||||
tmap[name] = template;
|
||||
this.template = template;
|
||||
}
|
||||
}
|
||||
}
|
||||
__owl__.render = qweb.render.bind(qweb, this.template);
|
||||
this.__observeState();
|
||||
return this.__render(false, [], scope, vars);
|
||||
}
|
||||
|
||||
async __render(
|
||||
force: boolean = false,
|
||||
patchQueue: any[] = [],
|
||||
scope?: Object,
|
||||
vars?: any
|
||||
): Promise<VNode> {
|
||||
const __owl__ = this.__owl__;
|
||||
__owl__.renderId++;
|
||||
const promises: Promise<void>[] = [];
|
||||
const patch: any[] = [this];
|
||||
if (__owl__.isMounted) {
|
||||
patchQueue.push(patch);
|
||||
}
|
||||
if (__owl__.observer) {
|
||||
__owl__.observer.allowMutations = false;
|
||||
}
|
||||
let vnode;
|
||||
try {
|
||||
vnode = __owl__.render!(this, {
|
||||
promises,
|
||||
handlers: __owl__.boundHandlers,
|
||||
mountedHandlers: __owl__.mountedHandlers,
|
||||
forceUpdate: force,
|
||||
patchQueue,
|
||||
scope,
|
||||
vars
|
||||
});
|
||||
} catch (e) {
|
||||
vnode = __owl__.vnode || h("div");
|
||||
errorHandler(e, this);
|
||||
}
|
||||
patch.push(vnode);
|
||||
if (__owl__.observer) {
|
||||
__owl__.observer.allowMutations = true;
|
||||
}
|
||||
|
||||
// this part is critical for the patching process to be done correctly. The
|
||||
// tricky part is that a child component can be rerendered on its own, which
|
||||
// will update its own vnode representation without the knowledge of the
|
||||
// parent component. With this, we make sure that the parent component will be
|
||||
// able to patch itself properly after
|
||||
vnode.key = __owl__.id;
|
||||
__owl__.renderProps = this.props;
|
||||
__owl__.renderPromise = Promise.all(promises).then(() => vnode);
|
||||
return __owl__.renderPromise;
|
||||
}
|
||||
|
||||
/**
|
||||
* Only called by qweb t-component directive
|
||||
*/
|
||||
__mount(vnode: VNode, elm: HTMLElement): VNode {
|
||||
const __owl__ = this.__owl__;
|
||||
if (__owl__.classObj) {
|
||||
(<any>vnode).data.class = Object.assign((<any>vnode).data.class || {}, __owl__.classObj);
|
||||
}
|
||||
__owl__.vnode = patch(elm, vnode);
|
||||
if (__owl__.parent!.__owl__.isMounted && !__owl__.isMounted) {
|
||||
this.__callMounted();
|
||||
}
|
||||
return __owl__.vnode;
|
||||
}
|
||||
|
||||
/**
|
||||
* Only called by qweb t-component directive (when t-keepalive is set)
|
||||
*/
|
||||
__remount() {
|
||||
const __owl__ = this.__owl__;
|
||||
if (!__owl__.isMounted) {
|
||||
__owl__.isMounted = true;
|
||||
this.mounted();
|
||||
}
|
||||
}
|
||||
|
||||
__observeState() {
|
||||
if (this.state) {
|
||||
const __owl__ = this.__owl__;
|
||||
__owl__.observer = new Observer();
|
||||
__owl__.observer.observe(this.state);
|
||||
__owl__.observer.notifyCB = this.render.bind(this);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Apply default props (only top level).
|
||||
*
|
||||
* Note that this method does not modify in place the props, it returns a new
|
||||
* prop object
|
||||
*/
|
||||
__applyDefaultProps(props: Object | undefined, defaultProps: Object): Props {
|
||||
props = props ? Object.create(props) : {};
|
||||
for (let propName in defaultProps) {
|
||||
if (props![propName] === undefined) {
|
||||
props![propName] = defaultProps[propName];
|
||||
}
|
||||
}
|
||||
return <Props>props;
|
||||
}
|
||||
|
||||
/**
|
||||
* Apply the given patch queue. A patch is a pair [c, vn], where c is a
|
||||
* Component instance and vn a VNode.
|
||||
* 1) Call 'willPatch' on the component of each patch
|
||||
* 2) Call '__patch' on the component of each patch
|
||||
* 3) Call 'patched' on the component of each patch, in inverse order
|
||||
*/
|
||||
__applyPatchQueue(patchQueue: any[]) {
|
||||
let component = this;
|
||||
try {
|
||||
const patchLen = patchQueue.length;
|
||||
for (let i = 0; i < patchLen; i++) {
|
||||
const patch = patchQueue[i];
|
||||
component = patch[0];
|
||||
patch.push(patch[0].willPatch());
|
||||
}
|
||||
for (let i = 0; i < patchLen; i++) {
|
||||
const patch = patchQueue[i];
|
||||
patch[0].__patch(patch[1]);
|
||||
}
|
||||
for (let i = patchLen - 1; i >= 0; i--) {
|
||||
const patch = patchQueue[i];
|
||||
component = patch[0];
|
||||
patch[0].patched(patch[2]);
|
||||
}
|
||||
} catch (e) {
|
||||
errorHandler(e, component);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
//------------------------------------------------------------------------------
|
||||
// Error handling
|
||||
//------------------------------------------------------------------------------
|
||||
|
||||
function errorHandler(error, component) {
|
||||
let canCatch = false;
|
||||
let qweb = component.env.qweb;
|
||||
let root = component;
|
||||
while (component && !(canCatch = component.catchError !== Component.prototype.catchError)) {
|
||||
root = component;
|
||||
component = component.__owl__.parent;
|
||||
}
|
||||
console.error(error);
|
||||
// we trigger error on QWeb so it can be logged/handled
|
||||
qweb.trigger("error", error);
|
||||
|
||||
if (canCatch) {
|
||||
setTimeout(() => {
|
||||
component.catchError(error);
|
||||
});
|
||||
} else {
|
||||
root.destroy();
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user