private string getTableBody(DiffContext ctx)
{
bool highlightSelected = ctx.Lines.Count() > 1;
StringBuilder body = new StringBuilder();
int iLine = 0;
foreach (DiffContext.Line line in ctx.Lines)
{
body.Append("<tr");
body.Append((iLine == ctx.SelectedIndex && highlightSelected ? " class=\"selected\"" : ""));
body.Append(">");
body.Append("<td class=\"linenumbers\">");
body.Append(getLeftLineNumber(line));
body.Append("</td>");
body.Append("<td class=\"linenumbers\">");
body.Append(getRightLineNumber(line));
body.Append("</td>");
body.Append("<td class=\"");
body.Append(getDiffCellClass(line));
body.Append("\">");
body.Append(getCode(line));
body.Append("</td>");
body.Append("</tr>");
++iLine;
}
return(body.ToString());
}
// isRightSideContext is true when linenumber corresponds to the right side (sha2).
// linenumber is one-based
private DiffContext createDiffContext(int linenumber, bool isRightSideContext, FullContextDiff context,
ContextDepth depth)
{
int startLineNumber = Math.Max(1, linenumber - depth.Up);
int endLineNumber = linenumber + depth.Down;
SparsedListIterator <string> itLeft = context.Left.Begin();
SparsedListIterator <string> itRight = context.Right.Begin();
if (isRightSideContext)
{
itRight = SparsedListUtils.FindNth(itRight, startLineNumber - 1);
itLeft = SparsedListUtils.Advance(itLeft, itRight.Position);
}
else
{
itLeft = SparsedListUtils.FindNth(itLeft, startLineNumber - 1);
itRight = SparsedListUtils.Advance(itRight, itLeft.Position);
}
DiffContext diffContext = new DiffContext
{
Lines = new List <DiffContext.Line>()
};
int iContextLine = 0;
while (true)
{
int?leftLineNumber = itLeft.LineNumber != null ? itLeft.LineNumber + 1 : null;
int?rightLineNumber = itRight.LineNumber != null ? itRight.LineNumber + 1 : null;
DiffContext.Line line = getLineContext(leftLineNumber, rightLineNumber, itLeft.Current, itRight.Current);
diffContext.Lines.Add(line);
if ((leftLineNumber.HasValue && !isRightSideContext && leftLineNumber == linenumber) ||
(rightLineNumber.HasValue && isRightSideContext && rightLineNumber == linenumber))
{
// zero-based index of a selected line in DiffContext.Lines
diffContext.SelectedIndex = iContextLine;
}
if ((leftLineNumber.HasValue && !isRightSideContext && leftLineNumber >= endLineNumber) ||
(rightLineNumber.HasValue && isRightSideContext && rightLineNumber >= endLineNumber))
{
// we've just reached a line that should not be included in the context
break;
}
if (!itLeft.Next() || !itRight.Next())
{
// we've just reached the end
break;
}
++iContextLine;
}
return(diffContext);
}
private static string getTable(DiffContext ctx)
{
string commonBegin = @"
<table cellspacing=""0"" cellpadding=""0"">
<tbody>";
string commonEnd = @"
</tbody>
</table>";
return(String.Format("{0} {1} {2}", commonBegin, getTableBody(ctx), commonEnd));
}
private string getTableBody(DiffContext ctx)
{
bool highlightSelected = ctx.Lines.Count > 1;
string body = string.Empty;
for (int iLine = 0; iLine < ctx.Lines.Count; ++iLine)
{
var line = ctx.Lines[iLine];
body
+= "<tr" + (iLine == ctx.SelectedIndex && highlightSelected ? " class=\"selected\"" : "") + ">"
+ "<td class=\"linenumbers\">" + getLeftLineNumber(line) + "</td>"
+ "<td class=\"linenumbers\">" + getRightLineNumber(line) + "</td>"
+ "<td class=\"" + getDiffCellClass(line) + "\">" + getCode(line) + "</td>"
+ "</tr>";
}
return(body);
}
private string getContextHTML(DiffContext ctx, int fontSizePx, int rowsVPaddingPx)
{
string customStyle = getCustomStyle(fontSizePx, rowsVPaddingPx);
string commonBegin = string.Format(@"
<html>
<head>
<style>{0}{1}</style>
</head>
<body>
<table cellspacing=""0"" cellpadding=""0"">
<tbody>", _css, customStyle);
string commonEnd = @"
</tbody>
</table>
</body>
</html>";
return(commonBegin + getTableBody(ctx) + commonEnd);
}
/// <summary>
/// Throws ArgumentException if DiffContext is invalid
/// </summary>
public static string GetHtml(DiffContext context, double fontSizePx, int rowsVPaddingPx, bool fullWidth)
{
if (!context.IsValid())
{
string errorMessage = "Cannot render HTML context.";
return(String.Format("<html><body>{0} See logs for details</body></html>", errorMessage));
}
return(String.Format(
@"<html>
<head>
<style>
{0}
</style>
</head>
<body>
{1}
<body>
</html>",
getStylesheet(fontSizePx, rowsVPaddingPx, fullWidth), getTable(context)));
}
// isRightSideContext is true when linenumber and sha correspond to the right side
// linenumber is one-based
private DiffContext createDiffContext(int linenumber, List <string> contents, bool isRightSideContext,
ContextDepth depth)
{
DiffContext diffContext = new DiffContext
{
Lines = new List <DiffContext.Line>()
};
int startLineNumber = Math.Max(1, linenumber - depth.Up);
IEnumerable <string> shiftedContents = contents.Skip(startLineNumber - 1);
foreach (string text in shiftedContents)
{
diffContext.Lines.Add(getContextLine(startLineNumber + diffContext.Lines.Count, isRightSideContext, text));
if (diffContext.Lines.Count == depth.Size + 1)
{
break;
}
}
// zero-based index of a selected line in DiffContext.Lines
diffContext.SelectedIndex = linenumber - startLineNumber;
return(diffContext);
}
/// <summary>
/// Throws ArgumentException if DiffContext is invalid
/// </summary>
public string FormatAsHTML(DiffContext context, int fontSizePx = 12, int rowsVPaddingPx = 2)
{
return(getContextHTML(context, fontSizePx, rowsVPaddingPx));
}
/// <summary>
/// Throws ArgumentException if DiffContext is invalid
/// </summary>
public string GetBody(DiffContext context)
{
return(getContextHTML(context));
}
