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e d k r� d d l Z e j d d d d d �n d S)z'Define SearchEngine for search dialogs.� N)� StringVar�
BooleanVar�TclErrorc C s( t | d � s! t | � | _ n | j S)z�Return the singleton SearchEngine instance for the process.
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d d � Z d# d d � Z d d d d � Z d d d � Z d d! d" � Z d S)$r z<Handles searching a text widget for Find, Replace, and Grep.c C sy | | _ t | d � | _ t | d � | _ t | d � | _ t | d � | _ t | d � | _ t | d � | _ d S)z�Initialize Variables that save search state.
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S)a� Return (lineno, matchobj) or None for forward/backward search.
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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
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at the insert mark.
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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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r2 c C s( t t | j d � � \ } } | | f S)z8Return (line, col) tuple of ints from 'line.col' string.rE )rH rI rJ )rG r< r. r r r
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