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115 lines
3.6 KiB
115 lines
3.6 KiB
/*
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* @doc INTERNAL
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*
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* @module _URLSUP.H URL detection support |
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*
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* Author: alexgo (4/1/96)
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*
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* Copyright (c) 1995-2000, Microsoft Corporation. All rights reserved.
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*/
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#ifndef _URLSUP_H_
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#define _URLSUP_H_
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#include "_dfreeze.h"
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#include "_notmgr.h"
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#include "_range.h"
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class CTxtEdit;
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class IUndoBuilder;
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// Maximum URL length. It's a good thing to have a protection like
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// this to make sure we don't select the whole document; and we really
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// need this for space-containing URLs.
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// Note (keithcu). I bumped these values up because of RAID 7210. I thought about
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// removing this support altogether, but it's nice to have and speeds up
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// performance when you are inserting angle brackets inside URLs and you
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// do the left one first.
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#define URL_MAX_SIZE 4096
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// for MoveByDelimiter
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#define URL_EATWHITESPACE 32
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#define URL_STOPATWHITESPACE 1
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#define URL_EATNONWHITESPACE 0
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#define URL_STOPATNONWHITESPACE 2
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#define URL_EATPUNCT 0
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#define URL_STOPATPUNCT 4
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#define URL_EATNONPUNCT 0
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#define URL_STOPATNONPUNCT 8
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#define URL_STOPATCHAR 16
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// need this one to initialize a scan with something invalid
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#define URL_INVALID_DELIMITER TEXT(' ')
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#define LEFTANGLEBRACKET TEXT('<')
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#define RIGHTANGLEBRACKET TEXT('>')
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/*
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* CDetectURL
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*
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* @class This class watches edit changes and automatically
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* changes detected URL's into links (see CFE_LINK && EN_LINK)
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*/
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class CDetectURL : public ITxNotify
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{
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//@access Public Methods
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public:
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// constructor/destructor
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CDetectURL(CTxtEdit *ped); //@cmember constructor
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~CDetectURL(); //@cmember destructor
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// ITxNotify methods
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//@cmember Called before a change
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virtual void OnPreReplaceRange( LONG cp, LONG cchDel, LONG cchNew,
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LONG cpFormatMin, LONG cpFormatMax, NOTIFY_DATA *pNotifyData );
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//@cmember Called after a change
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virtual void OnPostReplaceRange( LONG cp, LONG cchDel, LONG cchNew,
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LONG cpFormatMin, LONG cpFormatMax, NOTIFY_DATA *pNotifyData );
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virtual void Zombie(); //@cmember Turn into a zombie
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// useful methods
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void ScanAndUpdate(IUndoBuilder *publdr);//@cmember Scan changed area
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// & update link status
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//@cmember Return TRUE if text is a URL
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BOOL IsURL(CTxtPtr &tp, LONG cch, BOOL *pfURLLeadin);
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//@access Private Methods and Data
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private:
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// Worker routines for ScanAndUpdate
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BOOL GetScanRegion(LONG& cpStart, LONG& cpEnd);//@cmember Get region to
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// check & clear accumulator
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static void ExpandToURL(CTxtRange& rg, LONG &cchAdvance);
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//@cmember Expand range to next
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// URL candidate
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static void SetURLEffects(CTxtRange& rg, IUndoBuilder *publdr); //@cmember Set
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// desired URL effects
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//@cmember Remove URL effects if
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// appropriate
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void CheckAndCleanBogusURL(CTxtRange& rg, BOOL &fDidClean, IUndoBuilder *publdr);
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//@cmember Scan along for white
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// space / not whitespace,
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// punctuation / non punctuation
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// and remember what stopped scan
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static LONG MoveByDelimiters(const CTxtPtr& tp, LONG iDir, DWORD grfDelimiters,
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WCHAR *pchStopChar);
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static LONG GetAngleBracket(CTxtPtr &tp, LONG cch = 0);
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static WCHAR BraceMatch(WCHAR chEnclosing);
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CTxtEdit * _ped; //@cmember Edit context
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CAccumDisplayChanges _adc; //@cmember Change accumulator
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// FUTURE (alexgo): we may want to add more options to detection,
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// such as the charformat to use on detection, etc.
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};
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#endif // _URLSUP_H_
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