nehan/dist/physical-size.js

Html layout engine for paged-media written in Typescript

import { Utils, LogicalSize, } from "./public-api";
export class PhysicalSize {
    constructor(size) {
        this.width = size.width;
        this.height = size.height;
    }
    static load(element) {
        const attr_width = element.getAttribute("width");
        const attr_height = element.getAttribute("height");
        const prop_width = attr_width || element.computedStyle.getPropertyValue("width");
        const prop_height = attr_height || element.computedStyle.getPropertyValue("height");
        const width = prop_width === "auto" ? 0 : Utils.atoi(attr_width || prop_width || "0");
        const height = prop_height === "auto" ? 0 : Utils.atoi(attr_height || prop_height || "0");
        return new PhysicalSize({ width: width, height: height });
    }
    getLogicalSize(writing_mode) {
        return new LogicalSize({
            measure: this.getMeasure(writing_mode),
            extent: this.getExtent(writing_mode)
        });
    }
    getExtent(writing_mode) {
        return writing_mode.isTextVertical() ? this.width : this.height;
    }
    getMeasure(writing_mode) {
        return writing_mode.isTextVertical() ? this.height : this.width;
    }
    getWidthPerHeight() {
        return (this.height === 0) ? 1 : this.width / this.height;
    }
    isZero() {
        return this.width === 0 && this.height === 0;
    }
    hasZero() {
        return this.width === 0 || this.height === 0;
    }
}
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