document highlights!

1 files changed, 37 insertions, 0 deletions

diff --git a/ted.c b/ted.c
index 831242d..5941f9a 100644
--- a/ted.c
+++ b/ted.c
@@ -567,3 +567,40 @@ void ted_go_to_lsp_document_position(Ted *ted, LSP *lsp, LSPDocumentPosition pos
 	u32 character = position.pos.character;
 	ted_go_to_position(ted, path, line, character, true);
 }
+
+void ted_highlight_lsp_range(Ted *ted, TextBuffer *buffer, LSPRange range) {
+	Font *font = buffer_font(buffer);
+	const u32 *colors = buffer_settings(buffer)->colors;
+	float char_height = font->char_height;
+	BufferPos range_start = buffer_pos_from_lsp(buffer, range.start);
+	BufferPos range_end = buffer_pos_from_lsp(buffer, range.end);
+	// draw the highlight
+	if (range_start.line == range_end.line) {
+		v2 a = buffer_pos_to_pixels(buffer, range_start);
+		v2 b = buffer_pos_to_pixels(buffer, range_end);
+		b.y += char_height;
+		gl_geometry_rect(rect_endpoints(a, b), colors[COLOR_HOVER_HL]);
+	} else if (range_end.line - range_start.line < 1000) { // prevent gigantic highlights from slowing things down
+		// multiple lines.
+		v2 a = buffer_pos_to_pixels(buffer, range_start);
+		v2 b = buffer_pos_to_pixels(buffer, buffer_pos_end_of_line(buffer, range_start.line));
+		b.y += char_height;
+		gl_geometry_rect(rect_endpoints(a, b), colors[COLOR_HOVER_HL]);
+		
+		for (u32 line = range_start.line + 1; line < range_end.line; ++line) {
+			// these lines are fully contained in the range.
+			BufferPos start = buffer_pos_start_of_line(buffer, line);
+			BufferPos end = buffer_pos_end_of_line(buffer, line);
+			a = buffer_pos_to_pixels(buffer, start);
+			b = buffer_pos_to_pixels(buffer, end);
+			b.y += char_height;
+			gl_geometry_rect(rect_endpoints(a, b), colors[COLOR_HOVER_HL]);
+		}
+		
+		// last line
+		a = buffer_pos_to_pixels(buffer, buffer_pos_start_of_line(buffer, range_end.line));
+		b = buffer_pos_to_pixels(buffer, range_end);
+		b.y += char_height;
+		gl_geometry_rect(rect_endpoints(a, b), colors[COLOR_HOVER_HL]);
+	}
+}