Function diffData

src/plot_api/plot_api.js:2751–2806

(gd, oldFullData, newFullData, immutable, transition, newDataRevision)

}

function diffData(gd, oldFullData, newFullData, immutable, transition, newDataRevision) {
    var sameTraceLength = oldFullData.length === newFullData.length;

    if (!transition && !sameTraceLength) {
        return {
            fullReplot: true,
            calc: true
        };
    }

    var flags = editTypes.traceFlags();
    flags.arrays = {};
    flags.nChanges = 0;
    flags.nChangesAnim = 0;

    var i, trace;

    function getTraceValObject(parts) {
        var out = PlotSchema.getTraceValObject(trace, parts);
        if (!trace._module.animatable && out.anim) {
            out.anim = false;
        }
        return out;
    }

    var diffOpts = {
        getValObject: getTraceValObject,
        flags: flags,
        immutable: immutable,
        transition: transition,
        newDataRevision: newDataRevision,
        gd: gd
    };

    var seenUIDs = {};

    for (i = 0; i < oldFullData.length; i++) {
        if (newFullData[i]) {
            trace = newFullData[i]._fullInput;
            if (seenUIDs[trace.uid]) continue;
            seenUIDs[trace.uid] = 1;

            getDiffFlags(oldFullData[i]._fullInput, trace, [], diffOpts);
        }
    }

    if (flags.calc || flags.plot) {
        flags.fullReplot = true;
    }

    if (transition && flags.nChanges && flags.nChangesAnim) {
        flags.anim = flags.nChanges === flags.nChangesAnim && sameTraceLength ? 'all' : 'some';
    }

    return flags;
}

function diffLayout(gd, oldFullLayout, newFullLayout, immutable, transition) {