Method Insert

external/zep/src/buffer.cpp:897–959

    }

    bool ZepBuffer::Insert(const GlyphIterator& startIndex, const std::string& str, ChangeRecord& changeRecord) {
        if (!startIndex.Valid()) {
            return false;
        }

        GlyphIterator endIndex(this, startIndex.Index() + long(str.length()));

        sigPreInsert(*this, startIndex, str);

        // We are about to modify this range
        // TODO: Is this correct, and/or useful in any way??
        // We aren't changing this range at all; we are shifting those characters forward and replacing the area
        GetEditor().Broadcast(std::make_shared<BufferMessage>(this, BufferMessageType::PreBufferChange, startIndex, endIndex));

        // abcdef\r\nabc<insert>dfdf\r\n
        auto itrLine = std::lower_bound(m_lineEnds.begin(), m_lineEnds.end(), startIndex.Index());
        ;
        if (itrLine != m_lineEnds.end() && *itrLine <= startIndex.Index()) {
            itrLine++;
        }

        auto itrEnd = str.end();
        auto itrBegin = str.begin();
        auto itr = str.begin();

        // Make a list of lines to 'insert'
        std::vector<long> lines;
        std::string lineEndSymbols("\n");
        while (itr != itrEnd) {
            // Get to first point after "\n"
            // That's the point just after the end of the current line
            itr = std::find_first_of(itr, itrEnd, lineEndSymbols.begin(), lineEndSymbols.end());
            if (itr != itrEnd) {
                if (itr != itrEnd && *itr == '\n') {
                    itr++;
                }
                lines.push_back(long(itr - itrBegin) + startIndex.Index());
            }
        }

        // Increment the rest of the line ends
        // We make all the remaning line ends bigger by the fixed_size of the insertion
        auto itrAdd = itrLine;
        while (itrAdd != m_lineEnds.end()) {
            *itrAdd += long(str.length());
            itrAdd++;
        }

        if (!lines.empty()) {
            // Update the atomic line counter so clients can see where we are up to.
            m_lineEnds.insert(itrLine, lines.begin(), lines.end());
        }

        changeRecord.strInserted = str;
        m_workingBuffer.insert(m_workingBuffer.begin() + startIndex.Index(), str.begin(), str.end());

        MarkUpdate();