Method remove

src/RichText/TextBox.cpp:1139–1184

}

TextPosition TextBox::remove(TextPosition p1, TextPosition p2) {
    auto [start, end] = get_start_end_text_pos(p1, p2);

    if(start == end || start.fParagraphIndex == paragraphs.size())
        return start;
    if(start.fParagraphIndex == end.fParagraphIndex) {
        assert(end.fTextByteIndex > start.fTextByteIndex);
        paragraphs[start.fParagraphIndex].text.erase(start.fTextByteIndex, end.fTextByteIndex - start.fTextByteIndex);
    }
    else {
        assert(end.fParagraphIndex < paragraphs.size());
        auto& paragraph = paragraphs[start.fParagraphIndex];
        paragraph.text.erase(start.fTextByteIndex, paragraph.text.size() - start.fTextByteIndex);
        paragraph.text.insert(start.fTextByteIndex, paragraphs[end.fParagraphIndex].text.substr(end.fTextByteIndex));
        paragraphs.erase(paragraphs.begin() + start.fParagraphIndex + 1, paragraphs.begin() + end.fParagraphIndex + 1);
    }

    for(int32_t i = 0; i < static_cast<int32_t>(tStyleMods.size()); i++) {
        PositionedTextStyleMod& tStyleMod = tStyleMods[i];
        auto& p = tStyleMod.pos;
        if(p > start) {
            if(end > p)
                p = start;
            else if(start.fParagraphIndex == p.fParagraphIndex)
                p.fTextByteIndex -= (end.fTextByteIndex - start.fTextByteIndex);
            else if(end.fParagraphIndex == p.fParagraphIndex) {
                p.fParagraphIndex = start.fParagraphIndex;
                p.fTextByteIndex = start.fTextByteIndex + (p.fTextByteIndex - end.fTextByteIndex);
            }
            else
                p.fParagraphIndex -= (end.fParagraphIndex - start.fParagraphIndex);
        }
        if(i > 0 && tStyleMods[i - 1].pos == p) {
            auto& tStyleModsToMergeWith = tStyleMods[i - 1].mods;
            for(auto& [modType, tStyle] : tStyleMod.mods)
                tStyleModsToMergeWith[modType] = tStyle;
            tStyleMods.erase(tStyleMods.begin() + i);
            i--;
        }
    }

    remove_duplicate_text_style_mods();
    needsRebuild = true;

    return start;
}

TextPosition TextBox::byte_text_pos_to_render_text_pos(TextPosition pos) {
    pos = move(Movement::NOWHERE, pos);