ui-todo: Large-scale refactoring

This is a complete overhaul of the TODO list user interface. The new
implementation uses the generic list box panel.

Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>

1 files changed, 113 insertions, 161 deletions

diff --git a/src/ui-todo.c b/src/ui-todo.c
index 60838af..930b595 100644
--- a/src/ui-todo.c
+++ b/src/ui-todo.c
@@ -36,11 +36,6 @@
 
 #include "calcurse.h"
 
-static int hilt = 0;
-static int todos = 0;
-static int first = 1;
-static char *msgsav;
-
 /* Request user to enter a new todo item. */
 void ui_todo_add(void)
 {
@@ -58,7 +53,8 @@ void ui_todo_add(void)
 			ch = wgetch(win[KEY].p);
 		}
 		todo_add(todo_input, ch - '0', NULL);
-		ui_todo_set_nb(ui_todo_nb() + 1);
+		ui_todo_sel_move(1);
+		ui_todo_load_items();
 	}
 }
 
@@ -74,34 +70,28 @@ void ui_todo_delete(void)
 	const int nb_erase_choice = 2;
 	int answer;
 
-	if ((ui_todo_nb() <= 0) ||
+	if (!LLIST_FIRST(&todolist) ||
 	    (conf.confirm_delete
 	     && (status_ask_bool(del_todo_str) != 1))) {
 		wins_erase_status_bar();
 		return;
 	}
 
-	/* This todo item doesn't have any note associated. */
-	if (todo_get_item(ui_todo_hilt())->note == NULL)
-		answer = 1;
+	struct todo *item = todo_get_item(listbox_get_sel(&lb_todo));
+
+	if (item->note)
+		answer = status_ask_choice(erase_warning, erase_choice,
+					   nb_erase_choice);
 	else
-		answer =
-		    status_ask_choice(erase_warning, erase_choice,
-				      nb_erase_choice);
+		answer = 1;
 
 	switch (answer) {
 	case 1:
-		todo_delete(todo_get_item(ui_todo_hilt()));
-		ui_todo_set_nb(ui_todo_nb() - 1);
-		if (ui_todo_hilt() > 1)
-			ui_todo_hilt_decrease(1);
-		if (ui_todo_nb() == 0)
-			ui_todo_hilt_set(0);
-		if (ui_todo_hilt_pos() < 0)
-			ui_todo_first_decrease(1);
+		todo_delete(item);
+		ui_todo_load_items();
 		break;
 	case 2:
-		todo_delete_note(todo_get_item(ui_todo_hilt()));
+		todo_delete_note(item);
 		break;
 	default:
 		wins_erase_status_bar();
@@ -112,12 +102,14 @@ void ui_todo_delete(void)
 /* Edit the description of an already existing todo item. */
 void ui_todo_edit(void)
 {
-	struct todo *i;
+	if (!LLIST_FIRST(&todolist))
+		return;
+
+	struct todo *item = todo_get_item(listbox_get_sel(&lb_todo));
 	const char *mesg = _("Enter the new TODO description:");
 
 	status_mesg(mesg, "");
-	i = todo_get_item(ui_todo_hilt());
-	updatestring(win[STA].p, &i->mesg, 0, 1);
+	updatestring(win[STA].p, &item->mesg, 0, 1);
 }
 
 /* Pipe a todo item to an external program. */
@@ -128,7 +120,11 @@ void ui_todo_pipe(void)
 	int pout;
 	int pid;
 	FILE *fpout;
-	struct todo *todo;
+
+	if (!LLIST_FIRST(&todolist))
+		return;
+
+	struct todo *item = todo_get_item(listbox_get_sel(&lb_todo));
 
 	status_mesg(_("Pipe item to external command:"), "");
 	if (getstring(win[STA].p, cmd, BUFSIZ, 0, 1) != GETSTRING_VALID)
@@ -137,10 +133,7 @@ void ui_todo_pipe(void)
 	wins_prepare_external();
 	if ((pid = shell_exec(NULL, &pout, *arg, arg))) {
 		fpout = fdopen(pout, "w");
-
-		todo = todo_get_item(ui_todo_hilt());
-		todo_write(todo, fpout);
-
+		todo_write(item, fpout);
 		fclose(fpout);
 		child_wait(NULL, &pout, pid);
 		press_any_key();
@@ -148,171 +141,130 @@ void ui_todo_pipe(void)
 	wins_unprepare_external();
 }
 
-/* Sets which todo is highlighted. */
-void ui_todo_hilt_set(int highlighted)
+/* Display todo items in the corresponding panel. */
+void ui_todo_draw(int n, WINDOW *win, int y, int hilt, void *cb_data)
 {
-	hilt = highlighted;
-}
+	llist_item_t *i = *((llist_item_t **)cb_data);
+	struct todo *todo = LLIST_TS_GET_DATA(i);
+	int mark[2];
+	int width = lb_todo.sw.w;
+	char buf[width * UTF8_MAXLEN];
+	int j;
 
-void ui_todo_hilt_decrease(int n)
-{
-	hilt -= n;
-}
+	mark[0] = todo->id > 0 ? '0' + todo->id : 'X';
+	mark[1] = todo->note ? '>' : '.';
 
-void ui_todo_hilt_increase(int n)
-{
-	hilt += n;
-}
+	if (hilt)
+		custom_apply_attr(win, ATTR_HIGHEST);
 
-/* Return which todo is highlighted. */
-int ui_todo_hilt(void)
-{
-	return hilt;
-}
+	if (utf8_strwidth(todo->mesg) < width) {
+		mvwprintw(win, y, 0, "%c%c %s", mark[0], mark[1], todo->mesg);
+	} else {
+		for (j = 0; todo->mesg[j] && width > 0; j++) {
+			if (!UTF8_ISCONT(todo->mesg[j]))
+				width -= utf8_width(&todo->mesg[j]);
+			buf[j] = todo->mesg[j];
+		}
+		if (j)
+			buf[j - 1] = 0;
+		else
+			buf[0] = 0;
+		mvwprintw(win, y, 0, "%c%c %s...", mark[0], mark[1], buf);
+	}
 
-/* Set the number of todos. */
-void ui_todo_set_nb(int nb)
-{
-	todos = nb;
-}
+	if (hilt)
+		custom_remove_attr(win, ATTR_HIGHEST);
 
-/* Set which one is the first todo to be displayed. */
-void ui_todo_set_first(int nb)
-{
-	first = nb;
+	*((llist_item_t **)cb_data) = i->next;
 }
 
-void ui_todo_first_increase(int n)
+int ui_todo_height(int n, void *cb_data)
 {
-	first += n;
+	return 1;
 }
 
-void ui_todo_first_decrease(int n)
+void ui_todo_load_items(void)
 {
-	first -= n;
+	int n = 0;
+	llist_item_t *i;
+
+	/* TODO: Optimize this by keeping the list size in a variable. */
+	LLIST_FOREACH(&todolist, i)
+		n++;
+
+	listbox_load_items(&lb_todo, n);
 }
 
-/*
- * Return the position of the hilghlighted item, relative to the first one
- * displayed.
- */
-int ui_todo_hilt_pos(void)
+void ui_todo_sel_move(int delta)
 {
-	return hilt - first;
+	listbox_sel_move(&lb_todo, delta);
 }
 
-/* Return the number of todos. */
-int ui_todo_nb(void)
+/* Updates the TODO panel. */
+void ui_todo_update_panel(int which_pan)
 {
-	return todos;
+	/*
+	 * This is used and modified by display_todo_item() to avoid quadratic
+	 * running time.
+	 */
+	llist_item_t *p = LLIST_FIRST(&todolist);
+
+	listbox_set_cb_data(&lb_todo, &p);
+	listbox_display(&lb_todo);
 }
 
-/* Return the last visited todo. */
-char *ui_todo_saved_mesg(void)
+/* Change an item priority by pressing '+' or '-' inside TODO panel. */
+void ui_todo_chg_priority(int diff)
 {
-	return msgsav;
+	if (!LLIST_FIRST(&todolist))
+		return;
+
+	struct todo *item = todo_get_item(listbox_get_sel(&lb_todo));
+	int id = item->id + diff;
+	struct todo *item_new;
+
+	if (id < 1)
+		id = 1;
+	else if (id > 9)
+		id = 9;
+
+	item_new = todo_add(item->mesg, id, item->note);
+	todo_delete(item);
+	listbox_set_sel(&lb_todo, todo_get_position(item_new));
 }
 
-/* Display todo items in the corresponding panel. */
-static void
-display_todo_item(int incolor, char *msg, int prio, int note, int width,
-		  int y, int x)
+void ui_todo_popup_item(void)
 {
-	WINDOW *w;
-	int ch_note;
-	char buf[width * UTF8_MAXLEN], priostr[2];
-	int i;
-
-	w = win[TOD].p;
-	ch_note = (note) ? '>' : '.';
-	if (prio > 0)
-		snprintf(priostr, sizeof priostr, "%d", prio);
-	else
-		strncpy(priostr, "X", sizeof priostr);
+	if (!LLIST_FIRST(&todolist))
+		return;
 
-	if (incolor == 0)
-		custom_apply_attr(w, ATTR_HIGHEST);
-	if (utf8_strwidth(msg) < width) {
-		mvwprintw(w, y, x, "%s%c %s", priostr, ch_note, msg);
-	} else {
-		for (i = 0; msg[i] && width > 0; i++) {
-			if (!UTF8_ISCONT(msg[i]))
-				width -= utf8_width(&msg[i]);
-			buf[i] = msg[i];
-		}
-		if (i)
-			buf[i - 1] = 0;
-		else
-			buf[0] = 0;
-		mvwprintw(w, y, x, "%s%c %s...", priostr, ch_note, buf);
-	}
-	if (incolor == 0)
-		custom_remove_attr(w, ATTR_HIGHEST);
+	struct todo *item = todo_get_item(listbox_get_sel(&lb_todo));
+	item_in_popup(NULL, NULL, item->mesg, _("TODO:"));
 }
 
-/* Updates the TODO panel. */
-void ui_todo_update_panel(int which_pan)
+void ui_todo_flag(void)
 {
-	llist_item_t *i;
-	int len = win[TOD].w - 8;
-	int num_todo = 0;
-	int title_lines = conf.compact_panels ? 1 : 3;
-	int y_offset = title_lines, x_offset = 1;
-	int t_realpos = -1;
-	int todo_lines = 1;
-	int max_items = win[TOD].h - 4;
-	int incolor = -1;
-
-	if ((int)win[TOD].h < 4)
+	if (!LLIST_FIRST(&todolist))
 		return;
 
-	/* Print todo item in the panel. */
-	erase_window_part(win[TOD].p, 1, title_lines, win[TOD].w - 2,
-			  win[TOD].h - 2);
-	LLIST_FOREACH(&todolist, i) {
-		struct todo *todo = LLIST_TS_GET_DATA(i);
-		num_todo++;
-		t_realpos = num_todo - first;
-		incolor = (which_pan == TOD) ? num_todo - hilt : num_todo;
-		if (incolor == 0)
-			msgsav = todo->mesg;
-		if (t_realpos >= 0 && t_realpos < max_items) {
-			display_todo_item(incolor, todo->mesg, todo->id,
-					  (todo->note != NULL) ? 1 : 0,
-					  len, y_offset, x_offset);
-			y_offset = y_offset + todo_lines;
-		}
-	}
+	struct todo *item = todo_get_item(listbox_get_sel(&lb_todo));
+	todo_flag(item);
+}
 
-	/* Draw the scrollbar if necessary. */
-	if (todos > max_items) {
-		int sbar_length = max_items * (max_items + 1) / todos;
-		int highend = max_items * first / todos;
-		unsigned hilt_bar = (which_pan == TOD) ? 1 : 0;
-		int sbar_top = highend + title_lines;
-
-		if ((sbar_top + sbar_length) > win[TOD].h - 1)
-			sbar_length = win[TOD].h - 1 - sbar_top;
-		draw_scrollbar(win[TOD].p, sbar_top, win[TOD].w - 2,
-			       sbar_length, title_lines, win[TOD].h - 1,
-			       hilt_bar);
-	}
+void ui_todo_view_note(void)
+{
+	if (!LLIST_FIRST(&todolist))
+		return;
 
-	wnoutrefresh(win[TOD].p);
+	struct todo *item = todo_get_item(listbox_get_sel(&lb_todo));
+	todo_view_note(item, conf.pager);
 }
 
-/* Change an item priority by pressing '+' or '-' inside TODO panel. */
-void ui_todo_chg_priority(struct todo *todo, int diff)
+void ui_todo_edit_note(void)
 {
-	int id = todo->id + diff;
-	struct todo *todo_new;
-
-	if (id < 1)
-		id = 1;
-	else if (id > 9)
-		id = 9;
+	if (!LLIST_FIRST(&todolist))
+		return;
 
-	todo_new = todo_add(todo->mesg, id, todo->note);
-	todo_delete(todo);
-	hilt = todo_get_position(todo_new);
+	struct todo *item = todo_get_item(listbox_get_sel(&lb_todo));
+	todo_edit_note(item, conf.editor);
 }