Add leading/trailing ellipsis for truncated search results

Frameworks/Find/src/FFResultNode.mm

@@ -272,6 +272,11 @@ static NSAttributedString* AttributedStringForMatch (std::string const& text, si
 	std::string middle = m.excerpt.substr(from, to - from);
 	std::string suffix = m.excerpt.substr(to);
 
+	if(m.truncate_head)
+		prefix.insert(0, "…");
+	if(m.truncate_tail)
+		suffix.insert(suffix.size(), "…");
+
 	if(replacementString)
 		middle = m.captures.empty() ? to_s(replacementString) : format_string::expand(to_s(replacementString), m.captures);
 

Frameworks/Find/src/scan_path.cc

@@ -210,9 +210,11 @@ namespace find
 			text::pos_t to(crlfCount, it.to - bol);
 			size_t toOffset = bol == it.to ? bol : (eol != std::string::npos ? (it.to <= eol ? eol : eol + crlf.size()) : text.size());
 
+			size_t orgFromOffset = fromOffset;
 			if(it.from - fromOffset > 200)
 				fromOffset = utf8::find_safe_end(text.begin(), text.begin() + it.from - ((it.from - fromOffset) % 150)) - text.begin();
 
+			size_t orgToOffset = toOffset;
 			if(toOffset - fromOffset > 500)
 				toOffset = utf8::find_safe_end(text.begin(), text.begin() + std::max<size_t>(fromOffset + 500, it.to)) - text.begin();
 
@@ -222,6 +224,8 @@ namespace find
 			match_t res(document, crc32.checksum(), it.from, it.to, text::range_t(from, to), it.captures);
 			res.excerpt        = text.substr(fromOffset, toOffset - fromOffset);
 			res.excerpt_offset = fromOffset;
+			res.truncate_head  = orgFromOffset < fromOffset;
+			res.truncate_tail  = toOffset < orgToOffset;
 			res.line_number    = from.line;
 			res.newlines       = crlf;
 			results.push_back(res);

Frameworks/Find/src/scan_path.h

@@ -26,6 +26,8 @@ namespace find
 		size_t excerpt_offset = 0;
 		size_t line_number = 0;
 		std::string newlines = "\n";
+		bool truncate_head = false;
+		bool truncate_tail = false;
 	};
 
 	struct scan_path_t