/// <summary>
/// Visit all text (non-formatting) characters in the rtf string
/// </summary>
/// <param name="rtf">The raw rtf string to walk.</param>
/// <param name="visitor">The <see cref="VisitCharacter"/> callback delegate</param>
public static void VisitTextCharacters(string rtf, VisitCharacter visitor)
{
int characterIndex = -1;
int rtfLength = rtf.Length;
int currentIndex = 1; // Skip the leading open {
char currentCharacter;
while (currentIndex < rtfLength)
{
switch (currentCharacter = rtf[currentIndex])
{
case '\\': // Start of a formatting block
++currentIndex;
switch (currentCharacter = rtf[currentIndex])
{
case '\\':
case '}':
case '{':
if (!visitor(currentCharacter, ++characterIndex, currentIndex))
{
return;
}
++currentIndex;
break;
default:
currentIndex = SkipFormattingBlock(rtf, currentIndex);
break;
}
break;
case '{': // Start of a header block
currentIndex = SkipHeaderBlock(rtf, currentIndex);
break;
case '}':
// Should only get this unescaped as the last character, we skipped the opening {
return;
default:
if (!visitor(currentCharacter, ++characterIndex, currentIndex))
{
return;
}
++currentIndex;
break;
}
}
}
/// <summary>
/// Visit all text (non-formatting) characters in the rtf string
/// </summary>
/// <param name="rtf">The raw rtf string to walk.</param>
/// <param name="visitor">The <see cref="VisitCharacter"/> callback delegate</param>
public static void VisitTextCharacters(string rtf, VisitCharacter visitor)
{
int characterIndex = -1;
int rtfLength = rtf.Length;
int currentIndex = 1; // Skip the leading open {
char currentCharacter;
while (currentIndex < rtfLength)
{
switch (currentCharacter = rtf[currentIndex])
{
case '\\': // Start of a formatting block
++currentIndex;
switch (currentCharacter = rtf[currentIndex])
{
case '\\':
case '}':
case '{':
if (!visitor(currentCharacter, ++characterIndex, currentIndex))
{
return;
}
++currentIndex;
break;
default:
currentIndex = SkipFormattingBlock(rtf, currentIndex);
break;
}
break;
case '{': // Start of a header block
currentIndex = SkipHeaderBlock(rtf, currentIndex);
break;
case '}':
// Should only get this unescaped as the last character, we skipped the opening {
return;
default:
if (!visitor(currentCharacter, ++characterIndex, currentIndex))
{
return;
}
++currentIndex;
break;
}
}
}
