X-Git-Url: https://git.danieliu.xyz/?p=taskasaur.git;a=blobdiff_plain;f=menu.c;h=816b5ddcf6c3c8e4705674566952b739b8f742f7;hp=ddcd8ded584575b18eb877d03b46f5cfdacbf528;hb=HEAD;hpb=82204679646dbb05f22adf6dca9bca18943ea9f6

diff --git a/menu.c b/menu.c
index ddcd8de..816b5dd 100644
--- a/menu.c
+++ b/menu.c
@@ -1,61 +1,510 @@
 
 #include <stdlib.h>
 #include <stddef.h>
+#include <string.h>
+#include <stdbool.h>
 #include <ncurses.h>
 
 #include "headers/menu.h"
+#include "headers/render.h"
 #include "headers/utils.h"
 
+#define MENU_PAD_TOP 2
+#define MENU_PAD_BOTTOM 2
+#define MENU_PAD_LEFT 2
+#define MENU_PAD_RIGHT 1
+
+#define MAX_CONTENTS_LENGTH 256
+
 typedef struct MenuItem {
-    char* contents;
+    char* title;
+    char* description;
+    void* userdata;
 } MenuItem;
 
 typedef struct Menu {
+    char* menu_name;
     MenuItem** menu_items;
     int menu_length;
     int selected_item;
+    int scroll_offset;
+    bool focused;
     WINDOW* menu_win;
+    int max_height;
+    int max_width;
+    void* userdata;
+    void (*render_item)(Menu*, int, int);
+    int (*item_height)(MenuItem*);
 } Menu;
 
-int render_menu(Menu* menu);
+int swap_item(Menu* menu, int src_index, int dest_index);
+
+/* insert mode */
+int menu_insert_mode(Menu* menu, int insert_index);
+
+/* prob temp for now */
+MenuItem* create_blank_menuitem(void);
+
+/* rendering stuff */
+void default_render_item(Menu* menu, int item_index, int start_y);
+int default_item_height(MenuItem* menuitem);
+int items_visible(Menu* menu, int offset);
+int items_visible_rev(Menu* menu, int offset);
+
+MenuItem*
+create_menuitem(char* title)
+{
+    MenuItem* new_menuitem;
+    TodoItem* new_userdata;
+
+    new_menuitem = malloc(sizeof(MenuItem));
+    new_menuitem->title = title;
+    new_menuitem->description = strdup(""); //TEMP FOR NOW
+
+    new_userdata = malloc(sizeof(TodoItem));
+    new_userdata->item_name = title;
+    new_userdata->description = strdup("");
+    new_userdata->due = strdup("");
+    new_userdata->subtask_list = malloc(0);
+    new_userdata->subtask_count = 0;
+    
+    new_menuitem->userdata = new_userdata;
+
+    return new_menuitem;
+}
+
+MenuItem*
+create_blank_menuitem(void)
+{
+    return create_menuitem(strdup(""));
+}
 
 Menu* 
-create_menu(MenuItem** item_list)
+create_menu(char* menu_name, MenuItem** item_list)
 {
-    Menu *new_menu;
+    Menu* new_menu;
 
     new_menu = malloc(sizeof(Menu));
+    new_menu->menu_name = menu_name;
     new_menu->menu_items = item_list;
     new_menu->menu_length = array_length(MenuItem*, item_list);
     new_menu->selected_item = 0;
-    WINDOW* menu_win = NULL;
+    new_menu->scroll_offset = 0;
+    new_menu->focused = false;
+    new_menu->userdata = NULL;
+    new_menu->render_item = *default_render_item;
+    new_menu->item_height = *default_item_height;
+    set_menu_win(new_menu, stdscr);
+
+    return new_menu;
+}
+
+/* getters */
+WINDOW*
+get_menu_win(Menu* menu)
+{
+    return menu->menu_win;
+}
+
+MenuItem*
+get_menu_item(Menu* menu, int index)
+{
+    if (index < 0 || index >= menu->menu_length) return NULL;
+
+    return menu->menu_items[index];
+}
 
-    return NULL;
+MenuItem**
+get_menu_itemlist(Menu* menu)
+{
+    return menu->menu_items;
 }
 
 int
-set_menu_items(Menu* menu, MenuItem** item_list)
+get_selected_item(Menu* menu)
 {
-    return 0;
+    return menu->selected_item;
 }
 
 MenuItem*
-get_menu_items(Menu* menu)
+get_selected_menuitem(Menu* menu)
 {
-    return NULL;
+    return get_menu_item(menu, get_selected_item(menu));
+}
+
+bool
+get_menu_focused(Menu* menu)
+{
+    return menu->focused;
+}
+
+int
+get_menu_length(Menu* menu)
+{
+    return menu->menu_length;
+}
+
+char*
+get_menu_name(Menu* menu)
+{
+    return menu->menu_name;
+}
+
+void*
+get_menu_userdata(Menu* menu)
+{
+    return menu->userdata;
+}
+
+char*
+get_menuitem_title(MenuItem* menuitem)
+{
+    return menuitem->title;
+}
+
+char*
+get_menuitem_descrip(MenuItem* menuitem)
+{
+    return menuitem->description;
+}
+
+void*
+get_menuitem_userdata(MenuItem* menuitem)
+{
+    return menuitem->userdata;
+}
+
+
+/* setters */
+int
+set_menu_win(Menu* menu, WINDOW* win)
+{
+    int height, width;
+
+    menu->menu_win = win;
+    getmaxyx(menu->menu_win, height, width);
+
+    menu->max_height = height-MENU_PAD_TOP-MENU_PAD_BOTTOM;
+    menu->max_width = width-MENU_PAD_LEFT-MENU_PAD_RIGHT;
+
+    return 0;
+}
+
+int
+set_selected_item(Menu* menu, int selected_item)
+{
+    menu->selected_item = selected_item;
+    return 0;
+}
+
+int
+set_menu_focus(Menu* menu, bool focus)
+{
+    menu->focused = focus;
+    return 0;
+}
+
+int
+set_menu_userdata(Menu* menu, void* userdata)
+{
+    menu->userdata = userdata;
+    return 0;
+}
+
+int
+set_menu_renderitem(Menu* menu, void (*render_item)(Menu*, int, int))
+{
+    menu->render_item = render_item;
+    return 0;
+}
+
+int
+set_menu_itemheight(Menu* menu, int (*item_height)(MenuItem*))
+{
+    menu->item_height = item_height;
+    return 0;
+}
+
+int
+set_menuitem_title(MenuItem* menuitem, char* title)
+{
+    menuitem->title = title;
+    return 0;
+}
+
+int
+set_menuitem_descrip(MenuItem* menuitem, char* descrip)
+{
+    menuitem->description = descrip;
+    return 0;
+}
+
+int
+set_menuitem_userdata(MenuItem* menuitem, void* userdata)
+{
+    menuitem->userdata = userdata;
+    return 0;
+}
+
+
+int
+swap_item(Menu* menu, int src_index, int dest_index)
+{
+    ar_swap_item((void**)menu->menu_items, src_index, dest_index);
+
+    return 0;
+}
+
+int
+delete_item(Menu* menu, int index)
+{
+    if (index < 0 || index > menu->menu_length-1) return -1;
+
+    for (int i = index; i <= menu->menu_length-1; i++) {
+        menu->menu_items[i] = menu->menu_items[i+1];
+    }
+
+    menu->menu_items = realloc(menu->menu_items, menu->menu_length*sizeof(MenuItem*)); 
+    menu->menu_items[menu->menu_length-1] = 0; // preserve null at end
+
+    menu->menu_length -= 1;
+
+    /* also move the current selected position if it's last */
+    if (menu->selected_item > menu->menu_length-1) {
+        menu->selected_item = menu->menu_length-1;
+    }
+
+    return 0;
+}
+
+int 
+insert_item(Menu* menu, MenuItem* menuitem, int index)
+{ // note, this func does not validate index
+
+    /* resize array and insert */
+    menu->menu_items = realloc(menu->menu_items, (menu->menu_length+2)*sizeof(MenuItem*));
+
+    for (int i = menu->menu_length; i > index; i--) {
+        menu->menu_items[i] = menu->menu_items[i-1];
+    }
+
+    menu->menu_items[index] = menuitem;
+    menu->menu_items[menu->menu_length+1] = 0; // remember null at end   
+    menu->menu_length += 1;
+
+    /* move cursor pos */
+    menu->selected_item = index;
+
+    return 0;
+}
+
+int
+menu_insert_mode(Menu* menu, int insert_index)
+{
+    char temp[MAX_CONTENTS_LENGTH+1]; // remember null
+    char* new_contents;
+    int insert_pos;
+
+    curs_on();
+
+    // account for multiline items
+    insert_pos = menu->scroll_offset;
+    for (int i = 0; i < insert_index; i++) {
+        insert_pos += menu->item_height(menu->menu_items[i]);
+    }
+
+    /* move cursor to right spot */
+    ungetstr(menu->menu_items[insert_index]->title);
+    mvwgetnstr(menu->menu_win,
+        insert_pos, 
+        0,
+        temp,
+        MAX_CONTENTS_LENGTH
+    );
+    curs_off();
+
+    /* copy out */
+    new_contents = strdup(temp);
+    menu->menu_items[insert_index]->title = new_contents;
+
+    /* delete if empty - maybe move this to a cleanup stage */
+    if (strlen(new_contents) == 0) {
+        delete_item(menu, insert_index);
+    }
+
+    return 0;
+}
+
+int
+menu_driver(Menu* menu, MenuAction action)
+{
+
+    switch (action) {
+        case MENU_UP:
+            menu->selected_item = menu->selected_item-1 >= 0 ? menu->selected_item-1 : 0;
+            break;
+
+        case MENU_DOWN:
+            menu->selected_item = menu->selected_item+1 <= menu->menu_length-1 ? menu->selected_item+1 : menu->menu_length-1;
+            break;
+
+        case MENU_TOP:
+            menu->selected_item = 0;
+            break;
+
+        case MENU_BOTTOM:
+            menu->selected_item = menu->menu_length-1;
+            break;
+
+        case MENU_MOVE_UP:
+            if (menu->selected_item <= 0) break;
+            swap_item(menu, menu->selected_item, menu->selected_item-1);
+            menu->selected_item -= 1;
+            break;
+
+        case MENU_MOVE_DOWN:
+            if (menu->selected_item >= menu->menu_length-1) break;
+            swap_item(menu, menu->selected_item, menu->selected_item+1);
+            menu->selected_item += 1;
+            break;
+
+        case MENU_DELETE:
+            delete_item(menu, menu->selected_item);
+            break;
+
+        case MENU_APPEND:
+            insert_item(menu, create_blank_menuitem(), menu->menu_length);
+            render_menu(menu); // refresh after inserting
+            menu_insert_mode(menu, menu->selected_item);
+            break;
+
+        case MENU_INSERT_ABOVE:
+            insert_item(menu, create_blank_menuitem(), menu->selected_item);
+            render_menu(menu);
+            menu_insert_mode(menu, menu->selected_item);
+            break;
+
+        case MENU_INSERT_BELOW:
+            insert_item(menu, create_blank_menuitem(), menu->selected_item+1);
+            render_menu(menu);
+            menu_insert_mode(menu, menu->selected_item); // inserted item is cur now
+            break;
+
+        case MENU_EDIT:
+            menu_insert_mode(menu, menu->selected_item);
+            break;
+
+        default: // This is here for debug, disable later
+            fprintf(stderr, "Invalid menu action");
+    }
+
+    return 0;
 }
 
 int
 render_menu(Menu* menu)
 {
+    wclear(menu->menu_win);
+
+    /* calculate scroll */
+    int visible;
+
+    visible = items_visible(menu, menu->scroll_offset);
 
-    for (int i = 0; i < menu->menu_length; i++) {
-        
-        /* color selected item */
+    if (menu->selected_item >= menu->scroll_offset+visible) {
+        menu->scroll_offset = clamp(
+            menu->selected_item-items_visible_rev(menu, menu->selected_item)+1,
+            0,
+            floorzero(menu->menu_length-1)
+        );
 
+    } else if (menu->selected_item < menu->scroll_offset) {
+        menu->scroll_offset = clamp(
+            menu->selected_item,
+            0,
+            floorzero(menu->menu_length-1)
+        );
     }
 
+    /* render menu items */
+    int curline = 0;
+    for (int i = menu->scroll_offset; i < menu->menu_length; i++) {
+        menu->render_item(menu, i, curline);
+        curline += menu->item_height(menu->menu_items[i]);
+    }
+
+    wrefresh(menu->menu_win);
+
     return 0;
 }
 
+void
+default_render_item(Menu* menu, int item_index, int start_y)
+{
+    MenuItem* curitem;
+    int hlcolor;
+
+    curitem = menu->menu_items[item_index];
+
+    /* color selected item */
+    hlcolor = COLOR_PAIR((item_index == menu->selected_item && menu->focused == true) ? TS_SELECTED : TS_NONSELECTED);
+    wattron(menu->menu_win, hlcolor);
+    mvwprintw(menu->menu_win, start_y, 0, curitem->title);
+    wattroff(menu->menu_win, hlcolor);
+}
+
+
+int
+default_item_height(MenuItem* menuitem)
+{ 
+    return 1; // maybe account for line wrap by default
+}
+
+int
+items_visible(Menu* menu, int offset)
+{
+    int maxheight;
+    int maxwidth; // unused
+
+    getmaxyx(menu->menu_win, maxheight, maxwidth);
+
+    int vis = 0;
+    int lines = 0;
+    for (int i = offset ; i < menu->menu_length; i++) {
+
+        lines += menu->item_height(menu->menu_items[i]);
+        if (lines > maxheight) break;
+        vis += 1;
+
+    }
+
+    return vis;
+}
+
+int
+items_visible_rev(Menu* menu, int offset)
+{
+    int maxheight;
+    int maxwidth; // unused
+
+    getmaxyx(menu->menu_win, maxheight, maxwidth);
+
+    int vis = 0;
+    int lines = 0;
+    for (int i = offset; i > 0; i--) {
+
+        lines += menu->item_height(menu->menu_items[i]);
+        if (lines > maxheight) break;
+        vis +=1;
+
+    }
+
+    return vis;
+}
+
+int
+free_menu(Menu* menu)
+{
+    return 0;
+}