gazeplotter/dist/class/Downloader/ScanGraphDownloader.js

Gazeplotter is a Svelte application for visualizing eye-tracking data.

import { AbstractDownloader } from './AbstractDownloader.ts';
import { getNumberOfParticipants, getNumberOfSegments, getParticipant, getSegment } from '../../stores/dataStore.ts';
export class ScanGraphDownloader extends AbstractDownloader {
    download(stimulusId, fileName) {
        const content = this.getStimulusScanGraphString(stimulusId);
        const txtFileContent = URL.createObjectURL(new Blob([content], { type: 'text/plain' }));
        this.triggerDownload(txtFileContent, fileName, '.txt');
    }
    getStimulusScanGraphString(stimulusId) {
        let result = '';
        const aoiKey = [];
        const alreadyUsedAoiIds = [];
        for (let i = 0; i < getNumberOfParticipants(); i++) {
            result += getParticipant(i).originalName + '\t';
            for (let j = 0; j < getNumberOfSegments(stimulusId, i); j++) {
                const aoi = getSegment(stimulusId, i, j).aoi;
                result += this.getAoiString(aoi);
                if (aoi.length === 0)
                    continue;
                if (alreadyUsedAoiIds.includes(aoi[0].id))
                    continue;
                aoiKey.push(this.getAoiKeyPart(aoi));
                if (aoi[0] === undefined)
                    continue;
                alreadyUsedAoiIds.push(aoi[0].id);
            }
            result += '\r\n';
        }
        aoiKey.sort();
        return this.getHeaderString(aoiKey.join(', ')) + result;
    }
    getHeaderString(aoiKey) {
        return `#
#
#
# Key:
# # = no fixation, ${aoiKey}
#
# The following part is the sequence similarity of the scanpaths
#
Sequence Similarity\tScanpath string
`;
    }
    getAoiString(aoi) {
        if (aoi.length === 0)
            return '#';
        return this.getAoiLetter(aoi[0].id);
    }
    getAoiLetter(aoi) {
        return String.fromCharCode(65 + aoi);
    }
    getAoiKeyPart(aoi) {
        if (aoi.length === 0)
            return '';
        const name = aoi[0].displayedName;
        return `${this.getAoiLetter(aoi[0].id)} = ${name}`;
    }
}