private int getRightByteChop() {
			if (editUseEnabled) {
				return 0;
			}
			if (visibleArea.width == 0) {
				// component not yet contained witin scroll pane
				return 0;
			}

			int visibleEnd = visibleArea.x + visibleArea.width - 1;
			int chop = allocationByteSize - ((visibleEnd + byteWidth) / byteWidth);
			return Math.max(0, chop);
		}
Get the number of bytes contained within the allocationByteSize which
are not visible on the right side.  When edit use is enabled the right
will always be zero regardless of visibility.
@return number of allocation bytes chopped from right
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/compositeeditor/BitFieldPlacementComponent.java