Method updateFilter

src/ImageViewer.cpp:2721–2843

}

void ImageViewer::updateFilter() {
    string filter = mFilter->value();
    string imagePart = filter;
    string groupPart = "";

    auto colonPos = filter.find_last_of(':');
    if (colonPos != string::npos) {
        imagePart = filter.substr(0, colonPos);
        groupPart = filter.substr(colonPos + 1);
    }

    // Image filtering
    {
        // Checks whether an image matches the filter. This is the case if the image name matches the image part and at least one of the
        // image's groups matches the group part.
        const auto doesImageMatch = [&](const auto& name, const auto& channelGroups) {
            bool doesMatch = matchesFuzzyOrRegex(name, imagePart, useRegex());
            if (doesMatch) {
                bool anyGroupsMatch = false;
                for (const auto& group : channelGroups) {
                    if (matchesFuzzyOrRegex(group.name, groupPart, useRegex())) {
                        anyGroupsMatch = true;
                        break;
                    }
                }

                if (!anyGroupsMatch) {
                    doesMatch = false;
                }
            }

            return doesMatch;
        };

        vector<string> activeImageNames;
        size_t id = 1;
        for (size_t i = 0; i < mImages.size(); ++i) {
            ImageButton* ib = dynamic_cast<ImageButton*>(mImageButtonContainer->children()[i]);
            ib->set_visible(doesImageMatch(ib->caption(), mImages[i]->channelGroups()));
            if (ib->visible()) {
                ib->setId(id++);
                activeImageNames.emplace_back(ib->caption());
            }
        }

        int beginOffset = 0, endOffset = 0;
        if (!activeImageNames.empty()) {
            string first = activeImageNames.front();
            int firstSize = (int)first.size();
            if (firstSize > 0) {
                bool allStartWithSameChar;
                do {
                    int len = codePointLength(first[beginOffset]);

                    allStartWithSameChar = ranges::all_of(activeImageNames, [&first, beginOffset, len](string_view name) {
                        if (beginOffset + len > (int)name.size()) {
                            return false;
                        }