private string ExportToHTML(Scintilla.ScintillaControl sc)
{
StringBuilder result = new StringBuilder();
result.Append("<span>");
int tabSize = 4;
int styleCurrent = sc.StyleAt(0);
result.Append(String.Format("<span class=\"S{0:d}\">", styleCurrent));
bool inStyleSpan = true;
int lengthDoc = sc.Length;
int column = 0;
for (int i = 0; i < lengthDoc; ++i)
{
char ch = sc.CharAt(i);
int style = sc.StyleAt(i);
if (style != styleCurrent)
{
if (inStyleSpan)
{
result.Append("</span>");
inStyleSpan = false;
}
if (ch != '\r' && ch != '\n')
{ // No need of a span for the EOL
result.Append(String.Format("<span class=\"S{0:d}\">", style));
inStyleSpan = true;
styleCurrent = style;
}
}
if (ch == ' ')
{
char prevCh = '\0';
if (column == 0)
{ // At start of line, must put a because regular space will be collapsed
prevCh = ' ';
}
while (i < lengthDoc && sc.CharAt(i) == ' ')
{
if (prevCh != ' ') {
result.Append(' ');
} else {
result.Append(" ");
}
prevCh = sc.CharAt(i);
i++;
column++;
}
i--; // the last incrementation will be done by the for loop
}
else if (ch == '\t')
{
int ts = tabSize - (column % tabSize);
for (int itab = 0; itab < ts; itab++)
{
if (itab % 2 == 1) {
result.Append(' ');
} else {
result.Append(" ");
}
}
column += ts;
}
else if (ch == '\r' || ch == '\n')
{
if (inStyleSpan)
{
result.Append("</span>");
inStyleSpan = false;
}
if (ch == '\r' && sc.CharAt(i + 1) == '\n')
{
i++; // CR+LF line ending, skip the "extra" EOL char
}
column = 0;
result.Append("<br />");
styleCurrent = sc.StyleAt(i + 1);
result.Append('\n');
if (sc.CharAt(i + 1) != '\r' && sc.CharAt(i + 1) != '\n')
{
// We know it's the correct next style,
// but no (empty) span for an empty line
result.Append(String.Format("<span class=\"S{0:d}\">", styleCurrent));
inStyleSpan = true;
}
}
else
{
switch (ch)
{
case '<':
result.Append("<");
break;
case '>':
result.Append(">");
break;
case '&':
result.Append("&");
break;
default:
result.Append(ch);
break;
}
column++;
}
}
if(inStyleSpan)
result.Append("</span>");
result.Append("</span>");
return result.ToString();
}
