C++ (Cpp) InlineTextBox::truncation示例

示例#1

static IntRect ellipsisRectForBox(const InlineTextBox& box, unsigned start, unsigned end)
{
    unsigned truncation = box.truncation();
    if (truncation == cNoTruncation)
        return IntRect();

    auto ellipsis = box.root().ellipsisBox();
    if (!ellipsis)
        return IntRect();
    
    IntRect rect;
    unsigned ellipsisStartPosition = start > box.start() ? start - box.start() : 0;
    ASSERT(end >= box.start());
    unsigned ellipsisEndPosition = std::min(end - box.start(), box.len());
    
    // The ellipsis should be considered to be selected if the end of
    // the selection is past the beginning of the truncation and the
    // beginning of the selection is before or at the beginning of the truncation.
    if (ellipsisEndPosition < truncation && ellipsisStartPosition > truncation)
        return IntRect();
    return ellipsis->selectionRect();
}