split file selector into its own thing

1 files changed, 166 insertions, 78 deletions

diff --git a/menu.c b/menu.c
index 334d17c..9c194c1 100644
--- a/menu.c
+++ b/menu.c
@@ -19,6 +19,169 @@ static void menu_close(Ted *ted, bool restore_prev_active_buffer) {
 	buffer_clear(&ted->line_buffer);
 }
 
+// returns the rectangle of the screen coordinates of the menu
+static Rect menu_rect(Ted *ted) {
+	Settings *settings = &ted->settings;
+	float window_width = ted->window_width, window_height = ted->window_height;
+	float padding = settings->padding;
+	float menu_width = settings->max_menu_width;
+	menu_width = minf(menu_width, window_width - 2 * padding);
+	return rect(
+		V2(window_width * 0.5f - 0.5f * menu_width, padding),
+		V2(menu_width, window_height - 2 * padding)
+	);
+}
+
+// where is the ith entry in the file selector on the screen?
+// returns false if it's completely offscreen
+static bool file_selector_entry_pos(Ted const *ted, FileSelector const *fs,
+	u32 i, Rect *r) {
+	Rect bounds = fs->bounds;
+	float char_height = text_font_char_height(ted->font);
+	*r = rect(V2(bounds.pos.x, bounds.pos.y + char_height * (float)i), 
+		V2(bounds.size.x, char_height));
+	return rect_clip_to_rect(r, bounds);
+}
+
+// clear the entries in the file selector
+static void file_selector_clear_entries(FileSelector *fs) {
+	for (u32 i = 0; i < fs->n_entries; ++i) {
+		free(fs->entries[i].name);
+	}
+	free(fs->entries);
+	fs->entries = NULL;
+	fs->n_entries = 0;
+}
+
+static void file_selector_free(FileSelector *fs) {
+	file_selector_clear_entries(fs);
+}
+
+// returns the entry of the selected file, or a NULL entry (check .name == NULL)
+// if none was selected
+static FileEntry file_selector_update(Ted *ted, FileSelector *fs, String32 const search_term32) {
+	char *search_term = search_term32.len ? str32_to_utf8_cstr(search_term32) : NULL;
+	
+	// check if an entry was clicked on
+	for (u32 i = 0; i < fs->n_entries; ++i) {
+		Rect r = {0};
+		if (file_selector_entry_pos(ted, fs, i, &r)) {
+			for (u32 c = 0; c < ted->nmouse_clicks[SDL_BUTTON_LEFT]; ++c) {
+				if (rect_contains_point(r, ted->mouse_clicks[SDL_BUTTON_LEFT][c])) {
+					// this option was selected
+					free(search_term);
+					return fs->entries[i];
+				}
+			}
+		} else break;
+	}
+	
+	// free previous entries
+	file_selector_clear_entries(fs);
+	// get new entries
+	char **files = fs_list_directory(".");
+	if (files) {
+		u32 nfiles;
+		for (nfiles = 0; files[nfiles]; ++nfiles);
+		if (search_term && *search_term) {
+			// filter entries based on search term
+			u32 in, out = 0;
+			for (in = 0; in < nfiles; ++in) {
+				if (stristr(files[in], search_term)) {
+					free(files[out]);
+					files[out++] = files[in];
+				}
+			}
+			nfiles = out;
+		}
+		
+		if (nfiles) {
+			FileEntry *entries = ted_calloc(ted, nfiles, sizeof *entries);
+			if (entries) {
+				fs->n_entries = nfiles;
+				fs->entries = entries;
+				for (u32 i = 0; i < nfiles; ++i) {
+					entries[i].name = files[i];
+					entries[i].type = fs_path_type(files[i]);
+				}
+			}
+		}
+	} else {
+		#if DEBUG
+		static bool have_warned;
+		if (!have_warned) {
+			debug_println("Warning: fs_list_directory failed.");
+			have_warned = true;
+		}
+		#endif
+	}
+	
+	free(search_term);
+	FileEntry ret = {0};
+	return ret;
+}
+
+static void file_selector_render(Ted const *ted, FileSelector const *fs) {
+	Settings const *settings = &ted->settings;
+	u32 const *colors = settings->colors;
+	Rect bounds = fs->bounds;
+	u32 n_entries = fs->n_entries;
+	FileEntry const *entries = fs->entries;
+	Font *font = ted->font;
+	float char_height = text_font_char_height(ted->font);
+	float x1, y1, x2, y2;
+	rect_coords(bounds, &x1, &y1, &x2, &y2);
+	float x = x1, y = y1;
+	for (u32 i = 0; i < n_entries; ++i) {
+		// highlight entry user is mousing over
+		if (y >= y2) break;
+		Rect r = rect4(x, y, x2, minf(y + char_height, y2));
+		y += char_height;
+		if (rect_contains_point(r, ted->mouse_pos)) {
+			glBegin(GL_QUADS);
+			gl_color_rgba(colors[COLOR_MENU_HL]);
+			rect_render(r);
+			glEnd();
+		}
+	}
+	
+	x = x1; y = y1;
+	TextRenderState text_render_state = {.min_x = x1, .max_x = x2, .min_y = y1, .max_y = y2, .render = true};
+	// render file names themselves
+	for (u32 i = 0; i < n_entries; ++i) {
+		if (y >= y2) break;
+		switch (entries[i].type) {
+		case FS_FILE:
+			gl_color_rgba(colors[COLOR_TEXT]);
+			break;
+		case FS_DIRECTORY:
+			gl_color_rgba(colors[COLOR_TEXT_FOLDER]);
+		default:
+			gl_color_rgba(colors[COLOR_TEXT_OTHER]);
+			break;
+		}
+		text_render_with_state(font, &text_render_state, entries[i].name, x, y);
+		y += char_height;
+	}
+}
+
+static void menu_update(Ted *ted, Menu menu) {
+	switch (menu) {
+	case MENU_NONE: break;
+	case MENU_OPEN: {
+		FileEntry selected_entry = file_selector_update(ted, &ted->file_selector,
+			buffer_get_line(&ted->line_buffer, 0));
+		if (selected_entry.name) {
+			// open that file!
+			if (ted_open_file(ted, selected_entry.name)) {
+				menu_close(ted, false);
+				file_selector_free(&ted->file_selector);
+			}
+		}
+	} break;
+	}
+}
+
 static void menu_render(Ted *ted, Menu menu) {
 	Settings *settings = &ted->settings;
 	u32 *colors = settings->colors;
@@ -34,8 +197,6 @@ static void menu_render(Ted *ted, Menu menu) {
 
 	
 	if (menu == MENU_OPEN) {
-		char *search_term = str32_to_utf8_cstr(buffer_get_line(&ted->line_buffer, 0));
-		char const *directory = ".";
 		float padding = 20;
 		float menu_x1 = window_width * 0.5f - 300;
 		float menu_x2 = window_width * 0.5f + 300;
@@ -67,81 +228,8 @@ static void menu_render(Ted *ted, Menu menu) {
 
 		buffer_render(&ted->line_buffer, line_buffer_x1, line_buffer_y1, line_buffer_x2, line_buffer_y2);
 
-		char **entries = fs_list_directory(directory);
-		u32 nentries = 0;
-		if (entries) {
-			for (char **p = entries; *p; ++p)
-				++nentries;
-		}
-		FsType *entry_types = calloc(nentries, sizeof *entry_types);
-		if (entries && (entry_types || !nentries)) {
-			if (search_term && *search_term) {
-				// filter entries based on search term
-				u32 in, out = 0;
-				for (in = 0; in < nentries; ++in) {
-					if (stristr(entries[in], search_term)) {
-						entries[out++] = entries[in];
-					}
-				}
-				nentries = out;
-			}
-			for (u32 i = 0; i < nentries; ++i) {
-				entry_types[i] = fs_path_type(entries[i]);
-			}
-
-			qsort(entries, nentries, sizeof *entries, str_qsort_case_insensitive_cmp);
-			char const *file_to_open = NULL;
-			{ // render file names
-				float start_x = menu_x1, start_y = line_buffer_y2 + inner_padding;
-				float x = start_x, y = start_y;
-				
-				for (u32 i = 0; i < nentries; ++i) {
-					// highlight entry user is mousing over
-					if (y >= menu_y2) break;
-					Rect r = rect4(x, y, menu_x2, minf(y + char_height, menu_y2));
-					y += char_height;
-					if (rect_contains_point(r, ted->mouse_pos)) {
-						glBegin(GL_QUADS);
-						gl_color_rgba(colors[COLOR_MENU_HL]);
-						rect_render(r);
-						glEnd();
-					}
-					for (u32 c = 0; c < ted->nmouse_clicks[SDL_BUTTON_LEFT]; ++c) {
-						if (rect_contains_point(r, ted->mouse_clicks[SDL_BUTTON_LEFT][c])) {
-							// this file got clicked on!
-							file_to_open = entries[i];
-						}
-					}
-				}
-				x = start_x, y = start_y;
-				TextRenderState text_render_state = {.min_x = menu_x1, .max_x = menu_x2, .min_y = menu_y1, .max_y = menu_y2, .render = true};
-				// render file names themselves
-				for (u32 i = 0; i < nentries; ++i) {
-					if (y >= menu_y2) break;
-					switch (entry_types[i]) {
-					case FS_FILE:
-						gl_color_rgba(colors[COLOR_TEXT]);
-						break;
-					case FS_DIRECTORY:
-						gl_color_rgba(colors[COLOR_TEXT_FOLDER]);
-					default:
-						gl_color_rgba(colors[COLOR_TEXT_OTHER]);
-						break;
-					}
-					text_render_with_state(font, &text_render_state, entries[i], x, y);
-					y += char_height;
-				}
-			}
-
-			if (file_to_open) {
-				ted_open_file(ted, file_to_open);
-				menu_close(ted, false);
-			}
-	
-			for (u32 i = 0; i < nentries; ++i) free(entries[i]);
-		}
-		free(entry_types);
-		free(entries);
-		free(search_term);
+		FileSelector *fs = &ted->file_selector;
+		fs->bounds = rect4(menu_x1, line_buffer_y2, menu_x2, menu_y2);
+		file_selector_render(ted, fs);
 	}
 }