ngx-extended-pdf-viewer/esm2015/lib/unit-to-px.js

Embedding PDF files in your Angular application. Highly configurable viewer including the toolbar, sidebar, and all the features you're used to.

export class UnitToPx {
    static initElements() {
        if (!document) {
            return;
        }
        if (!this.con || !this.el) {
            this.con = document.createElement('div');
            this.el = document.createElement('div');
        }
        this.con.style.position = 'absolute';
        this.con.style.width = '0';
        this.con.style.height = '0';
        this.con.style.visibility = 'hidden';
        this.con.style.overflow = 'hidden';
        this.con.appendChild(this.el);
    }
    static pxPerUnit(unit) {
        if (!this.pxPerUnitCache[unit]) {
            if (!this.con || !this.el) {
                this.initElements();
            }
            if (!this.con || !this.el) {
                // dummy implementation for server-side rendering
                return 1;
            }
            this.el.style.width = this.sample + unit;
            document.body.appendChild(this.con);
            const dimension = this.el.getBoundingClientRect();
            this.con.parentNode.removeChild(this.con);
            this.pxPerUnitCache[unit] = dimension.width / this.sample;
        }
        return this.pxPerUnitCache[unit];
    }
    static toPx(length) {
        const unitRe = /^\s*([+-]?[\d\.]*)\s*(.*)\s*$/i;
        const match = unitRe.exec(length);
        if (match != null && match.length > 2) {
            const bare = match[1] === '';
            const val = bare ? 1 : Number(match[1]);
            const unit = match[2];
            const valid = !isNaN(val) && unit;
            if (valid) {
                return unit === 'px' ? val : this.pxPerUnit(unit) * val;
            }
        }
        throw new TypeError('Error parsing length');
    }
}
// cache this.con, el for reused
UnitToPx.con = undefined;
UnitToPx.el = undefined;
// high sample will more accurate?
UnitToPx.sample = 100;
UnitToPx.pxPerUnitCache = {};
//# 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