/// <summary>
/// Creates a new RangeDataEx object.
/// </summary>
/// <param name="rangeStart">The starting point of the specified range.</param>
/// <param name="rangeEnd">The ending point of the specified range.</param>
/// <param name="baseRange">An existing RangeDataEx from which to clone formatting information.</param>
public RangeDataEx(int rangeStart, int rangeEnd, RangeDataEx baseRange)
{
m_Start = rangeStart;
m_End = rangeEnd;
m_Font = baseRange.m_Font;
m_FontSize = baseRange.m_FontSize;
m_Bold = baseRange.m_Bold;
m_Italics = baseRange.m_Italics;
m_InMath = baseRange.m_InMath;
}
/// <summary>
/// Determines if two ranges have the same formatting applied to them.
/// </summary>
/// <param name="ComparisonRange">A RangeDataEx to compare to.</param>
/// <returns>True if identical, False otherwise.</returns>
public bool IdenticalTo(RangeDataEx ComparisonRange)
{
if (m_Bold != ComparisonRange.m_Bold)
{
return(false);
}
else if (m_Italics != ComparisonRange.m_Italics)
{
return(false);
}
else if (m_Font != ComparisonRange.m_Font)
{
return(false);
}
else if (m_FontSize != ComparisonRange.m_FontSize)
{
return(false);
}
else
{
return(true);
}
}
/// <summary>
/// Redact a range, replacing all marked text.
/// </summary>
/// <param name="range">A range to redact.</param>
/// <param name="rangeData">A RangeDataEx containing properties about the range.</param>
private void RedactRange(Word.Range range, RangeDataEx rangeData)
{
object ParagraphNumber = Word.WdNumberType.wdNumberParagraph;
foreach (Word.Paragraph p in range.Paragraphs)
{
//get the para's range
Word.Range ParagraphRange = p.Range;
//trim to the selection, if needed
if (range.Start > ParagraphRange.Start)
{
ParagraphRange.Start = range.Start;
}
if (range.End < ParagraphRange.End)
{
ParagraphRange.End = range.End;
}
if (ParagraphRange.End == p.Range.End - 1 && ParagraphRange.Start == p.Range.Start)
{
p.Range.ListFormat.ConvertNumbersToText(ref ParagraphNumber); //if the whole para was redacted, redact the numbering
}
//make it black on black
ParagraphRange.Font.Shading.BackgroundPatternColor = Word.WdColor.wdColorAutomatic;
ParagraphRange.HighlightColorIndex = Word.WdColorIndex.wdBlack; //moving to highlighting instead of text background
ParagraphRange.Font.Color = Word.WdColor.wdColorBlack;
//get rid of links and bookmarks
foreach (Word.Hyperlink Hyperlink in ParagraphRange.Hyperlinks)
{
Hyperlink.Delete();
}
foreach (Word.Bookmark Bookmark in ParagraphRange.Bookmarks)
{
Bookmark.Delete();
}
//BUG 110: suppress proofing errors
ParagraphRange.NoProofing = -1;
//finally, replace the text
Debug.Assert(ParagraphRange.ShapeRange.Count == 0, "Some Shapes were not redacted by RedactShapes.");
if (ParagraphRange.InlineShapes.Count > 0)
{
//if there are images, then split into subranges and process text and images separately
List <RangeData> Subranges = RedactCommon.SplitRange(ParagraphRange);
for (int j = Subranges.Count - 1; j >= 0; j--)
{
//set start and end
ParagraphRange.Start = Subranges[j].Start;
ParagraphRange.End = Subranges[j].End;
if (ParagraphRange.InlineShapes.Count > 0)
{
RedactInlineShape(ParagraphRange.InlineShapes[1]);
}
else
{
ParagraphRange.Text = RedactCommon.BuildFillerText(ParagraphRange, rangeData);
}
}
}
else
{
ParagraphRange.Text = RedactCommon.BuildFillerText(ParagraphRange, rangeData);
}
}
}
/// <summary>
/// Builds a string of filler characters of the same size as the input text.
/// </summary>
/// <param name="range">The Range for which to build filler text.</param>
/// <param name="rangeData">The RangeDataEx containing properties about the range.</param>
/// <returns>The filler text.</returns>
internal static string BuildFillerText(Word.Range range, RangeDataEx rangeData)
{
string Result = string.Empty;
Label Label = new Label();
//get the correct string
if (rangeData.Bold && rangeData.Italic)
{
Label.Font = new System.Drawing.Font(rangeData.Font, rangeData.FontSize, FontStyle.Italic | FontStyle.Bold);
}
else if (rangeData.Bold)
{
Label.Font = new System.Drawing.Font(rangeData.Font, rangeData.FontSize, FontStyle.Bold);
}
else if (rangeData.Italic)
{
Label.Font = new System.Drawing.Font(rangeData.Font, rangeData.FontSize, FontStyle.Italic);
}
else
{
Label.Font = new System.Drawing.Font(rangeData.Font, rangeData.FontSize, FontStyle.Regular);
}
Label.AutoSize = true;
char[] delim = { ' ', '\v', '\f' }; // \v is a soft break, \f is a page break
string text = range.Text;
if (text == null)
{
return(null);
}
string[] lines = text.Split(delim);
int c = 0;
Random rnd = new Random();
foreach (string line in lines)
{
if (!string.IsNullOrEmpty(line))
{
Label.Text = line;
float obfuscationFactor = (float)rnd.Next(90, 110) / 100; // make each word +/- 10% to make it harder to determine the original value
float originalWidth = Label.PreferredWidth * obfuscationFactor;
for (Label.Text = string.Empty; Label.PreferredWidth < originalWidth; Label.Text += "'")
{
;
}
Result += Label.Text;
c += line.Length;
}
if (c < text.Length)
{
Result += text[c];
c++;
}
}
return(Result);
}
