nehan/dist/dynamic-style-context.js

Html layout engine for paged-media written in Typescript

import { Utils, CssLength, FlowFormatContext, } from "./public-api";
export class DynamicStyleContext {
    constructor(value) {
        this.selector = value.selector;
        this.name = value.name;
        this.element = value.element;
        this.parentContext = value.parentContext;
    }
    setExternalDOM($dom) {
        this.element.$dom = $dom;
    }
    get fontSize() {
        return CssLength.computeFontSize(this.element);
    }
    get remSize() {
        if (this.parentContext instanceof FlowFormatContext && this.parentContext.pageRoot) {
            return this.parentContext.pageRoot.env.font.size;
        }
        return this.emSize;
    }
    get emSize() {
        return CssLength.computeFontSize(this.element);
    }
    get lineHeight() {
        const value = this.element.computedStyle.getPropertyValue("line-height");
        if (!value) {
            throw new Error("line-height is not defined!");
        }
        if (value.indexOf("px") < 0) {
            return Math.floor(this.emSize * parseFloat(value));
        }
        return Utils.atoi(value);
    }
    get restContextBoxExtent() {
        if (this.parentContext) {
            return this.parentContext.restExtent;
        }
        throw new Error("parent context is not defined");
    }
}
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