/// HighlightRange - This is the same as the above method, but takes
/// decomposed file locations.
void html::HighlightRange(RewriteBuffer &RB, unsigned B, unsigned E,
const char *BufferStart,
const char *StartTag, const char *EndTag) {
// Insert the tag at the absolute start/end of the range.
RB.InsertTextAfter(B, StartTag);
RB.InsertTextBefore(E, EndTag);
// Scan the range to see if there is a \r or \n. If so, and if the line is
// not blank, insert tags on that line as well.
bool HadOpenTag = true;
unsigned LastNonWhiteSpace = B;
for (unsigned i = B; i != E; ++i) {
switch (BufferStart[i]) {
case '\r':
case '\n':
// Okay, we found a newline in the range. If we have an open tag, we need
// to insert a close tag at the first non-whitespace before the newline.
if (HadOpenTag)
RB.InsertTextBefore(LastNonWhiteSpace+1, EndTag);
// Instead of inserting an open tag immediately after the newline, we
// wait until we see a non-whitespace character. This prevents us from
// inserting tags around blank lines, and also allows the open tag to
// be put *after* whitespace on a non-blank line.
HadOpenTag = false;
break;
case '\0':
case ' ':
case '\t':
case '\f':
case '\v':
// Ignore whitespace.
break;
default:
// If there is no tag open, do it now.
if (!HadOpenTag) {
RB.InsertTextAfter(i, StartTag);
HadOpenTag = true;
}
// Remember this character.
LastNonWhiteSpace = i;
break;
}
}
}
static void AddLineNumber(RewriteBuffer &RB, unsigned LineNo,
unsigned B, unsigned E) {
SmallString<256> Str;
llvm::raw_svector_ostream OS(Str);
OS << "<tr><td class=\"num\" id=\"LN"
<< LineNo << "\">"
<< LineNo << "</td><td class=\"line\">";
if (B == E) { // Handle empty lines.
OS << " </td></tr>";
RB.InsertTextBefore(B, OS.str());
} else {
RB.InsertTextBefore(B, OS.str());
RB.InsertTextBefore(E, "</td></tr>");
}
}
static void AddLineNumber(RewriteBuffer &RB, unsigned LineNo,
unsigned B, unsigned E) {
llvm::SmallString<100> Str;
Str += "<tr><td class=\"num\" id=\"LN";
Str.append_uint(LineNo);
Str += "\">";
Str.append_uint(LineNo);
Str += "</td><td class=\"line\">";
if (B == E) { // Handle empty lines.
Str += " </td></tr>";
RB.InsertTextBefore(B, &Str[0], Str.size());
} else {
RB.InsertTextBefore(B, &Str[0], Str.size());
RB.InsertTextBefore(E, "</td></tr>", strlen("</td></tr>"));
}
}