simple find menu

1 files changed, 79 insertions, 3 deletions

diff --git a/find.c b/find.c
index 85816ba..309923d 100644
--- a/find.c
+++ b/find.c
@@ -1,3 +1,14 @@
+static void find_open(Ted *ted) {
+	ted->prev_active_buffer = ted->active_buffer;
+	ted->active_buffer = &ted->find_buffer;
+	ted->find = true;
+}
+
+static void find_close(Ted *ted) {
+	ted->find = false;
+	ted->active_buffer = ted->prev_active_buffer;
+}
+
 static float find_menu_height(Ted *ted) {
 	Font *font = ted->font, *font_bold = ted->font_bold;
 	float char_height = text_font_char_height(font),
@@ -5,7 +16,7 @@ static float find_menu_height(Ted *ted) {
 	Settings const *settings = &ted->settings;
 	float padding = settings->padding;
 
-	return char_height_bold + char_height + 4 * padding;
+	return char_height_bold + char_height + 2 * padding;
 }
 
 static void find_menu_frame(Ted *ted) {
@@ -19,10 +30,75 @@ static void find_menu_frame(Ted *ted) {
 	float const window_width = ted->window_width, window_height = ted->window_height;
 	u32 const *colors = settings->colors;
 
-	Rect menu_bounds = rect(V2(padding, window_height - menu_height), V2(window_width - 2*padding, menu_height - padding));
+	float x1 = padding, y1 = window_height - menu_height, x2 = window_width - padding, y2 = window_height - padding;
+	Rect menu_bounds = rect4(x1, y1, x2, y2);
 
 	gl_geometry_rect_border(menu_bounds, 1, colors[COLOR_BORDER]);
 
 	gl_geometry_draw();
-	(void)char_height; (void)char_height_bold;
+
+	text_utf8(font_bold, "Find...", x1 + padding, y1, colors[COLOR_TEXT]);
+	text_render(font_bold);
+
+	y1 += char_height_bold;
+
+	buffer_render(&ted->find_buffer, rect4(x1 + padding, y1, x2 - padding, y1 + char_height));
+}
+
+#define FIND_MAX_GROUPS 100
+
+// go to next find result
+static void find_next(Ted *ted) {
+	TextBuffer *buffer = ted->prev_active_buffer;
+	if (buffer) {
+		// create match data
+		pcre2_match_data *match_data = pcre2_match_data_create(FIND_MAX_GROUPS, NULL);
+		if (match_data) {
+			String32 term = buffer_get_line(&ted->find_buffer, 0);
+			int error = 0;
+			size_t error_pos = 0;
+			// compile the search term
+			pcre2_code *code = pcre2_compile(term.str, term.len, PCRE2_LITERAL, &error, &error_pos, NULL);
+			if (code) {
+				// do the searching
+				BufferPos pos = buffer->cursor_pos;
+				size_t nsearches = 0;
+				u32 nlines = buffer->nlines;
+
+				// we need to search the starting line twice, because we might start at a non-zero index
+				while (nsearches < nlines + 1) {
+					Line *line = &buffer->lines[pos.line];
+					char32_t *str = line->str;
+					size_t len = line->len;
+					int ret = pcre2_match(code, str, len, pos.index, 0, match_data, NULL);
+					if (ret > 0) {
+						PCRE2_SIZE *groups = pcre2_get_ovector_pointer(match_data);
+						u32 match_start = (u32)groups[0];
+						u32 match_end = (u32)groups[1];
+						BufferPos pos_start = {.line = pos.line, .index = match_start};
+						BufferPos pos_end = {.line = pos.line, .index = match_end};
+						buffer_cursor_move_to_pos(buffer, pos_start);
+						buffer_select_to_pos(buffer, pos_end);
+						break;
+					}
+
+					++nsearches;
+					pos.index = 0;
+					pos.line += 1;
+					pos.line %= nlines;
+				}
+			} else {
+				char32_t buf[256] = {0};
+				size_t len = (size_t)pcre2_get_error_message(error, buf, sizeof buf - 1);
+				char *error_cstr = str32_to_utf8_cstr(str32(buf, len));
+				if (error_cstr) {
+					ted_seterr(ted, "Invalid search term: (at position %zu) %s.", (size_t)error_pos, error_cstr);
+					free(error_cstr);
+				}
+			}
+			pcre2_match_data_free(match_data);
+		} else {
+			ted_seterr(ted, "Out of memory.");
+		}
+	}
 }