RichEditCtrl Syntax Highlighting

I wrote this class when I wanted to add syntax highlighting to a utility
that I was writing. I had tried the syntax highlighting classes already
available from CodeGuru and found each one lacking in some way for the
application that I was writing (I was doing some really odd stuff to get
it to work)

I cannot take all the credit though, some of the internal logic came from
Randy More’s Colorize class.

To use this class, simple setup you application to use CRichEditView,
then do a search and replace changing CRichEditView to CRichSyntaxView.

If you override OnInitualUpdate I do some initializing there so either
call mine yourself of do similar (or nothing if the defaults are good for

void CRichSyntaxView::OnInitialUpdate()
cf.dwMask = CFM_FACE | CFM_BOLD;
cf.dwEffects = 0;
strcpy(cf.szFaceName, "Arial");
// Set the printing margins (720 twips = 1/2 inch).
SetMargins(CRect(720, 720, 720, 720));

Member functions:

bool LoadKeyWordFile(CString word);
bool LoadKeyWordFile(CStdioFile& file);

Are from the guts of Randy More’s control, the CString version calls
the STDIO file version with a handle to the file pointed to by the

void AddComment(LPCTSTR key);
void AddKeyWord(LPCTSTR key);
void AddUserDefined(LPCTSTR key);

Do what they sound like, if you don’t want to use a keyword file for
simply want a way to give the user the ability to add things, Comments
are single line comments, KeyWord, and UserDefined are 2 different
COLORREF’s with similar logic. This just gives you the ability to
diferenciate between 2 different types(ie. C/C++ keywords and MFC


USER_DEFINED = RGB(100, 100, 0);
KEYWORD = RGB(0, 0, 200);
COMMENT = RGB(0, 200, 0);

These are the COLOREFS used to set the color of the
keywords/symbols. They are initialized by the default
constructor as shown

void SetFileName(CString word);

Gives you public access to the protected member sFileName, which
is the string used by the OnSave and OnOpen member functions.

void OnSave();
void OnOpen();

These are the logic behind the save and restore mechanism. They
allow you to save the text in the control to a Rich Text Format
file. You need to do any open or save dialogs yourself, they do
not work if sFileName.IsEmpty().

void Parse();
void ParseRange(int iMin, int iMax);

Causes the contents of the control(or a portion of the contents)
to be parsed. Parse() does the whole thing, ParseRange() does a
section(between iMin and iMax, iMin does not have to be less than iMax).


Download demo source – 5 Kb

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