Method getSize

Picviewer CE+/dist.user.js:12069–12097

(url, options = {})

        }

        async getSize(url, options = {}) {
            const { force = false, strategy = 'auto' } = options;
            if (!url) return null;

            if (!force && this.cache.has(url)) {
                return this.cache.get(url);
            }

            if (url.startsWith('data:')) {
                const size = this._calculateBase64Size(url);
                this.cache.set(url, size);
                return size;
            }

            if (url.startsWith('blob:')) {
                return this._getBlobSize(url);
            }

            if (strategy === 'local-only' || strategy === 'auto') {
                const perfSize = this._getFromPerformance(url);
                if (perfSize !== null) {
                    this.cache.set(url, perfSize);
                    return perfSize;
                }
                if (strategy === 'local-only') return null;
            }

            return this._scheduleRequest(url);
        }

        _calculateBase64Size(dataUrl) {
            const base64Str = dataUrl.split(',')[1];