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de�ndS(s'Define SearchEngine for search dialogs.i����N(t	StringVart
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�Zddd�Zdd�Zdd�ZRS(s<Handles searching a text widget for Find, Replace, and Grep.cCsy||_t|d�|_t|t�|_t|t�|_t|t�|_t|t�|_	t|t�|_
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|�dkr�|dnd}|j|||�dSX|S(s&Return compiled cooked search pattern.sEmpty regular expressioniiii����N(Rtreport_errortNoneRRRt
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S(s�Return (lineno, matchobj) or None for forward/backward search.

        This function calls the right function with the right arguments.
        It directly return the result of that call.

        Text is a text widget. Prog is a precompiled pattern.
        The ok parameter is a bit complicated as it has two effects.

        If there is a selection, the search begin at either end,
        depending on the direction setting and ok, with ok meaning that
        the search starts with the selection. Otherwise, search begins
        at the insert mark.

        To aid progress, the search functions do not return an empty
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get_selectionRtget_line_coltsearch_backwardtsearch_forward(RttextR(toktwraptfirsttlasttstarttlineR+tres((s,/usr/lib64/python2.7/idlelib/SearchEngine.pytsearch_textgs$	!	cCs�d}|}|jd|d|d�}	x�|	r�|j|	d |�}
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(cCs�|j|�}|sdSd}|j�\}}xi||kr�||kr�|}||krk|d}n|j||�}|s�Pn|j�\}}q4W|S(s&Search backwards and return an re match object or None.

    This is done by searching forwards until there is no match.
    Prog: compiled re object with a search method returning a match.
    Chars: line of text, without \n.
    Col: stop index for the search; the limit for match.end().
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	cCs(tt|jd��\}}||fS(s8Return (line, col) tuple of ints from 'line.col' string.RD(RGRHRI(RFR;R+((s,/usr/lib64/python2.7/idlelib/SearchEngine.pyR2�st__main__s#idlelib.idle_test.test_searchenginet	verbosityitexit((RMRtTkinterRRRR/RRRER1R2RKtunittesttmainR
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