ultraviolet/client/dom/node.js

import EventEmitter from "../events.js";
import HookEvent from "../hook.js";

class NodeApi extends EventEmitter {
    constructor(ctx) {
        super();
        this.ctx = ctx;
        this.window = ctx.window;
        this.Node = ctx.window.Node || {};
        this.nodeProto = this.Node.prototype || {};
        this.compareDocumentPosition = this.nodeProto.compareDocumentPosition;
        this.contains = this.nodeProto.contains;
        this.insertBefore = this.nodeProto.insertBefore;
        this.replaceChild = this.nodeProto.replaceChild;
        this.append = this.nodeProto.append;
        this.appendChild = this.nodeProto.appendChild;
        this.removeChild = this.nodeProto.removeChild;

        this.textContent = ctx.nativeMethods.getOwnPropertyDescriptor(this.nodeProto, 'textContent');
        this.parentNode = ctx.nativeMethods.getOwnPropertyDescriptor(this.nodeProto, 'parentNode');
        this.parentElement = ctx.nativeMethods.getOwnPropertyDescriptor(this.nodeProto, 'parentElement');
        this.childNodes = ctx.nativeMethods.getOwnPropertyDescriptor(this.nodeProto, 'childNodes');
        this.baseURI = ctx.nativeMethods.getOwnPropertyDescriptor(this.nodeProto, 'baseURI');
        this.previousSibling = ctx.nativeMethods.getOwnPropertyDescriptor(this.nodeProto, 'previousSibling');
        this.ownerDocument = ctx.nativeMethods.getOwnPropertyDescriptor(this.nodeProto, 'ownerDocument');
    };
    overrideTextContent() {
        this.ctx.overrideDescriptor(this.nodeProto, 'textContent', {
            get: (target, that) => {
                const event = new HookEvent({ value: target.call(that) }, target, that);
                this.emit('getTextContent', event);

                if (event.intercepted) return event.returnValue;
                return event.data.value;
            },
            set: (target, that, [ val ]) => {
                const event = new HookEvent({ value: val }, target, that);
                this.emit('setTextContent', event);

                if (event.intercepted) return event.returnValue;
                target.call(that, event.data.value);
            },
        });
    };
    overrideAppend() {
        this.ctx.override(this.nodeProto, 'append', (target, that, [ ...nodes ]) => {
            const event = new HookEvent({ nodes }, target, that);
            this.emit('append', event);

            if (event.intercepted) return event.returnValue;
            return event.target.call(event.that, event.data.nodes);
        });
        this.ctx.override(this.nodeProto, 'appendChild', (target, that, args) => {
            if (!args.length) return target.apply(that, args);
            let [ node ] = args;

            const event = new HookEvent({ node }, target, that);
            this.emit('appendChild', event);

            if (event.intercepted) return event.returnValue;
            return event.target.call(event.that, event.data.node);
        });
    };
    overrideBaseURI() {
        this.ctx.overrideDescriptor(this.nodeProto, 'baseURI', {
            get: (target, that) => {
                const event = new HookEvent({ value: target.call(that) }, target, that);
                this.emit('baseURI', event);

                if (event.intercepted) return event.returnValue;
                return event.data.value;
            },
        })
    };
    overrideParent() {
        this.ctx.overrideDescriptor(this.nodeProto, 'parentNode', {
            get: (target, that) => {
                const event = new HookEvent({ node: target.call(that) }, target, that);
                this.emit('parentNode', event);

                if (event.intercepted) return event.returnValue;
                return event.data.node;
            },
        });
        this.ctx.overrideDescriptor(this.nodeProto, 'parentElement', {
            get: (target, that) => {
                const event = new HookEvent({ element: target.call(that) }, target, that);
                this.emit('parentElement', event);

                if (event.intercepted) return event.returnValue;
                return event.data.node;
            },
        });
    };
    overrideOwnerDocument() {
        this.ctx.overrideDescriptor(this.nodeProto, 'ownerDocument', {
            get: (target, that) => {
                const event = new HookEvent({ document: target.call(that) }, target, that);
                this.emit('ownerDocument', event);

                if (event.intercepted) return event.returnValue;
                return event.data.document;
            },
        });
    };
    overrideCompareDocumentPosit1ion() {
        this.ctx.override(this.nodeProto, 'compareDocumentPosition', (target, that, args) => {
            if (!args.length) return target.apply(that, args);
            let [ node ] = args;
            const event = new HookEvent({ node }, target, that);

            if (event.intercepted) return event.returnValue;
            return event.target.call(event.that, event.data.node);
        });
    };
    overrideChildMethods() {
        this.ctx.override(this.nodeProto, 'removeChild')
    };
};  

export default NodeApi;