private void CheckTokenListAndOutput(SideObject sideObject, Token token)
{
// ok so is this token on the keywords & functions list?
object o = highlightingStyles[token.Value.ToUpperInvariant()];
if (o != null)
{
// yes...
if (sideObject.InSquareStringState && ((HighlightColour)o != HighlightColour.Datatype))
{
// but we're in square string state and it's not a datatype... so plain text colour
SetColour(HighlightColour.PlainText, sideObject);
}
else
{
// ok to set the colour to the one associated with the token
SetColour((HighlightColour)o, sideObject);
}
}
else
{
// no - so plain text colour
SetColour(HighlightColour.PlainText, sideObject);
}
// and append the token
sideObject.Text.Append(token.Value);
}
void getSQLFormattedString(string lineInput, SideObject sideObject)
{
// get a tokenised version of the input string
StringTokenizer st = new StringTokenizer(lineInput);
Token t;
while ((t = st.Next()) != null)
{
if (sideObject.InCommentState)
{
// ok we're in comment state - set the colour & output the current token
SetColour(HighlightColour.Comment, sideObject);
sideObject.Text.Append(t.Value);
// if this token isn't an end comment
if (t.Kind != TokenKind.EndComment)
{
// then keep reading...
while ((t = st.Next()) != null)
{
// ... output the current token ...
sideObject.Text.Append(t.Value);
// ... and if we're an end comment ...
if (t.Kind == TokenKind.EndComment)
{
// ... then cancel comment state and stop reading ...
sideObject.InCommentState = false;
break;
}
}
}
else
{
// the first token on the line was an end comment - so we're no longer in the comment state
sideObject.InCommentState = false;
}
}
else
{
if (sideObject.InSquareStringState)
{
// ok we're in square string state - check the token list and output the current token
CheckTokenListAndOutput(sideObject, t);
// if this token isn't an end square
if (t.Kind != TokenKind.EndSquare)
{
// then keep reading...
while ((t = st.Next()) != null)
{
// ... check the token list and output the current token ...
CheckTokenListAndOutput(sideObject, t);
// ... and if we're an end square ...
if (t.Kind == TokenKind.EndSquare)
{
// ... then cancel square string state and stop reading ...
sideObject.InSquareStringState = false;
break;
}
}
}
else
{
// the first token on the line was an end square - so we're no longer in the square string state
sideObject.InSquareStringState = false;
}
}
else
{
if (t.Kind == TokenKind.EOLComment)
{
// set comment highlight & output token
SetColour(HighlightColour.Comment, sideObject);
sideObject.Text.Append(t.Value);
// now read to the end of the line
while ((t = st.Next()) != null)
{
// and output each token (still in comment highlight)
sideObject.Text.Append(t.Value);
}
}
else if (t.Kind == TokenKind.StartComment)
{
// set comment highlight & output token
SetColour(HighlightColour.Comment, sideObject);
sideObject.Text.Append(t.Value);
// remember we're now in comment state
sideObject.InCommentState = true;
}
else if (t.Kind == TokenKind.StartSquare)
{
// set plain text highlight & output token
SetColour(HighlightColour.PlainText, sideObject);
sideObject.Text.Append(t.Value);
// remember we're now in square string state
sideObject.InSquareStringState = true;
}
else if (t.Kind == TokenKind.QuotedString)
{
// set string highlight & output token
SetColour(HighlightColour.String, sideObject);
sideObject.Text.Append(t.Value);
}
else if (t.Kind == TokenKind.Number)
{
// set number highlight & output token
SetColour(HighlightColour.Number, sideObject);
sideObject.Text.Append(t.Value);
}
else
{
// check keywords, functions etc & output token
CheckTokenListAndOutput(sideObject, t);
}
}
}
}
}
private static void SetHighlight(HighlightColour colour, SideObject sideObject)
{
// if the highlight needs to be set
if (sideObject.lastHighlightIndex != colour)
{
// then set the highlight
int i = (int)colour;
sideObject.Text.Append("\\highlight").Append(i.ToString()).Append(" ");
// and record the fact
sideObject.lastHighlightIndex = colour;
}
}
private static void AppendLineNumber(SideObject left, SideObject right, int cnt)
{
// set the highlight to white
SetHighlight(HighlightColour.White, left);
SetHighlight(HighlightColour.White, right);
// set the line number colour
SetColour(HighlightColour.LineNumber, left);
SetColour(HighlightColour.LineNumber, right);
// and append the line number text to the left & right
left.Text.Append(cnt.ToString().PadLeft(4)).Append(" ");
right.Text.Append(cnt.ToString().PadLeft(4)).Append(" ");
}
private static void AppendLineBreak(SideObject left, SideObject right)
{
// append a line break to both the left & right
left.Text.Append("\\par\n");
right.Text.Append("\\par\n");
}
private static void AppendHeader(SideObject sideObject)
{
// append the standard header (including font setting & colour table) to side
sideObject.Text.Append(@"{\rtf1\fbidis\ansi\ansicpg1255\deff0\deflang1037{\fonttbl{");
sideObject.Text.Append(@"\f0\fnil\fcharset0Lucida Console;}");
sideObject.Text.Append("}\n");
sideObject.Text.Append(@"{\colortbl ;\red0\green0\blue0;\red255\green211\blue211;\red211\green255\blue211;\red211\green211\blue255;\red255\green255\blue255;\red0\green128\blue128;\red0\green0\blue255;\red255\green0\blue255;\red128\green128\blue128;\red0\green128\blue0;\red0\green0\blue128;\red255\green0\blue0;\red128\green0\blue0;");
sideObject.Text.Append("}\n");
sideObject.Text.Append(@"\viewkind4\uc1\pard\ltrpar\fs16 ");
}
public void CompareText()
{
// load the source and destination as TextFile objects
DiffList_TextFile tfSource = new DiffList_TextFile(leftText_);
DiffList_TextFile tfDestination = new DiffList_TextFile(rightText_);
// use DiffEngine to generate the difference list
DiffEngine de = new DiffEngine();
de.ProcessDiff(tfSource, tfDestination, DiffEngineLevel.SlowPerfect);
ArrayList DiffLines = de.DiffReport();
// create the objects to track the left & right sides
SideObject leftState = new SideObject();
SideObject rightState = new SideObject();
// add the RTF header to the left & right side objects
AppendHeader(leftState);
AppendHeader(rightState);
// initialise our variables
int cnt = 1;
int i = 0;
// now go through the result spans
foreach (DiffResultSpan drs in DiffLines)
{
// what is this Diff's status?
switch (drs.Status)
{
// a source line was deleted
case DiffResultSpanStatus.DeleteSource:
{
// for each line in the diff
for (i = 0; i < drs.Length; i++)
{
// put the line number on the left & right
AppendLineNumber(leftState, rightState, cnt);
// set highlight and output line on the left only
SetHighlight(HighlightColour.DeletedLine, leftState);
getSQLFormattedString(((TextLine)tfSource.GetByIndex(drs.SourceIndex + i)).Line, leftState);
// put in the line break
AppendLineBreak(leftState, rightState);
// increase the line count
cnt++;
}
} break;
// there was no change
case DiffResultSpanStatus.NoChange:
{
for (i = 0; i < drs.Length; i++)
{
// put the line number on the left & right
AppendLineNumber(leftState, rightState, cnt);
// output line on the left & right
getSQLFormattedString(((TextLine)tfSource.GetByIndex(drs.SourceIndex + i)).Line, leftState);
getSQLFormattedString(((TextLine)tfDestination.GetByIndex(drs.DestIndex + i)).Line, rightState);
// put in the line break
AppendLineBreak(leftState, rightState);
// increase the line count
cnt++;
}
} break;
// a target line was added
case DiffResultSpanStatus.AddDestination:
{
for (i = 0; i < drs.Length; i++)
{
// put the line number on the left & right
AppendLineNumber(leftState, rightState, cnt);
// set highlight and output line on the right only
SetHighlight(HighlightColour.AddedLine, rightState);
getSQLFormattedString(((TextLine)tfDestination.GetByIndex(drs.DestIndex + i)).Line, rightState);
// put in the line break
AppendLineBreak(leftState, rightState);
// increase the line count
cnt++;
}
} break;
// the text of the line changed
case DiffResultSpanStatus.Replace:
{
for (i = 0; i < drs.Length; i++)
{
// put the line number on the left & right
AppendLineNumber(leftState, rightState, cnt);
// set highlight & output line on the left & right
SetHighlight(HighlightColour.ChangedLine, leftState);
SetHighlight(HighlightColour.ChangedLine, rightState);
getSQLFormattedString(((TextLine)tfSource.GetByIndex(drs.SourceIndex + i)).Line, leftState);
getSQLFormattedString(((TextLine)tfDestination.GetByIndex(drs.DestIndex + i)).Line, rightState);
// put in the line break
AppendLineBreak(leftState, rightState);
// increase the line count
cnt++;
}
} break;
}
}
// now set the built text into the left & right rich text boxes
rtbLeft.Rtf = leftState.Text.ToString();
rtbRight.Rtf = rightState.Text.ToString();
}