可选的回调接口去得到当前的文件的页数。
Optional callback interface to return the number of pages in the current document.
按照顺序，首先要读取设置文档，得到当前的 OmniFind 连接信息。
Procedurally, the first step is to read the settings document to get the current OmniFind connection information.
使用颜色识别维护一个棋子信息的状态矩阵，由每一步走棋后的颜色信息和走棋前的状态矩阵可以得到当前的棋盘信息，从而更新状态矩阵。
The use of color recognition to maintain a state matrix, after each step away from the state matrix and color information can get the information of current chessboard, and restore the state matrix.
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