Syntax Highlighting Routine - Need help

Arthur Urban aturban at qwest.net
Thu Mar 23 05:26:33 EST 2006


I'm presuming you have massive speed issues? Well, even if you don't, I 
was thinking that maybe it would be best if you called SubHighlight in 
your rawKeyUp handler only for specific key presses like the spacebar or 
return key. That way you are colorizing only after complete words and 
lines have been entered. Just a thought, I don't know how exhaustive you 
need the user feedback to be. :)

Garrett Hylltun wrote:
> Rev 2.6.1
>
> Greetings,
>
> I made a routine for checking a FIELD from start to end for html tags, 
> then to change their color.  Worked great!  That is with a small html 
> file of maybe 4000 characters.  But then I ran a html file that was 
> about 28000 characters, and found my routine was not so good after all.
>
> the FIELD handlers;
>
> on rawKeyUp
>   SubHighlight
> end rawKeyUp
>
> on backspaceKey
>   SubHighlight
> end backspaceKey
>
> might not be best, but I don't know if there's any other way to keep 
> track of the contents of the FIELD, except to check on keyup events.
>
> Here's the sub;
>
> on SubHighlight
>   lock screen
>   put number of characters of field "fHtmlEditor" into varTotal
>   set the textstyle of char 1 to varTotal of field 1 to plain
>   put 1 into varCounter
>   put 1 into varStartChunk
>   put 1 into varEndChunk
>   repeat until varStartChunk >= varTotal or varGetOut is 1
>     put varCounter into field "fStatusBar"
>     put char varEndChunk to varEndChunk of field 1 into varTemp
>     put empty into varTagType
>     if varTemp is "<" then
>       put varEndChunk + 3 into varTemp
>       put char varEndChunk to varTemp of field 1 into varTemp
>       if varTemp is "<!--" then
>         put "comment" into varTagType
>       end if
>       put varEndChunk + 6 into varTemp
>       put char varEndChunk to varTemp of field 1 into varTemp
>       if varTemp is "<script" then
>         put "script" into varTagType
>       end if
>       put varEndChunk + 7 into varTemp
>       put char varEndChunk to varTemp of field 1 into varTemp
>       if varTemp is "</script" then
>         put "script" into varTagType
>       end if
>       put varEndChunk + 1 into varEndChunk
>       put char varEndChunk to varEndChunk of field 1 into varTemp
>       repeat until varTemp is ">" or varGetOut is 1 or varCounter >= 
> varTotal
>         put varCounter into field "fStatusBar"
>         put char varEndChunk to varEndChunk of field 1 into varTemp
>         if varTemp is "<" then
>           put 1 into varGetOut
>         end if
>         if varTemp is ">" then
>           if varTagType is "comment" then
>             set the textstyle of char varStartChunk to varEndChunk of 
> field 1 to Italic
>             set the foregroundColor of char varStartChunk to 
> varEndChunk of field 1 to "#404040"
>           else if varTagType is "script" then
>             set the foregroundColor of char varStartChunk to 
> varEndChunk of field 1 to "#ff0000"
>           else
>             --set the textstyle of char varStartChunk to varEndChunk 
> of field 1 to Bold
>             set the foregroundColor of char varStartChunk to 
> varEndChunk of field 1 to "#0000FF"
>           end if
>         end if
>         put varEndChunk + 1 into varEndChunk
>         put varCounter + 1 into varCounter
>         --put varTotal && "/" && varCounter into field "fStatusBar"
>       end repeat
>     else
>       put varStartChunk + 1 into varStartChunk
>       put varEndChunk + 1 into varEndChunk
>     end if
>     put varCounter + 1 into varCounter
>     put varEndChunk into varStartChunk
>     --put varTotal && "/" && varCounter into field "fStatusBar"
>   end repeat
>   unlock screen
> end SubHighlight
>
> It's not optimized code and there's some extra stuff in there for 
> testing.  And I know it's not pretty code either, it's merely a few 
> hours worth of thinking and trying code.
>
> I do not know of any other way to check the contents of the FIELD 
> without having to check the entire contents.
>
> Does anyone have any ideas, thoughts, suggestions or have done some 
> code like this before, that could help me out with this?
>
> Thanks,
> -Garrett
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