/// <summary>
/// 快速移除一个数据源
/// </summary>
/// <param name="_source">要移除的源</param>
public void RemoveSource(INavigationSourceProvider _source)
{
if (!m_allowAddAndRemove)
{
throw new Exception("无法对外来Source的NavigationBaker进行增删操作");
}
try
{
var _index = _source.GetSourceIndex();
if (_index != -1)
{
var lastIndex = sources.Count - 1;
sources[_index] = sources[lastIndex];
((INavigationSourceProvider)sources[_index].component).WriteSourceIndex(_index);
sources.RemoveAt(lastIndex);
_source.WriteSourceIndex(-1); //以便复用
}
}
catch (InvalidCastException)
{
throw new Exception("实现INavigationSourceProvider的类型在返回BuildSource时，必须指定component为自身");
}
}
/// <summary>
/// 往Source表中添加一个Source
/// </summary>
/// <param name="_source">描述了基本的位置，旋转以及大小</param>
public void AddSource(INavigationSourceProvider _source)
{
if (!m_allowAddAndRemove)
{
throw new Exception("无法对外来Source的NavigationBaker进行增删操作");
}
sources.Add(_source.GetSource());
_source.WriteSourceIndex(sources.Count - 1);
}
/// <summary>
/// 更新Source表中的Source
/// </summary>
/// <param name="_source"></param>
public void UpdateSource(INavigationSourceProvider _source)
{
if (!m_allowAddAndRemove)
{
throw new Exception("无法对外来Source的NavigationBaker进行增删操作");
}
var index = _source.GetSourceIndex();
if (index == -1)
{
AddSource(_source);
}
else
{
sources[index] = _source.GetSource();
}
}
