From 4ed8eb19f573d15b1b0526b2588bf20758b4f374 Mon Sep 17 00:00:00 2001
From: Uros Majstorovic <majstor@majstor.org>
Date: Sat, 6 Jun 2020 22:58:53 +0200
Subject: tile -> window; opverlapping windows added

---
 code/fe310/eos/eve/screen/screen.c | 42 +++++++++++++++++++++++++++++++++-----
 1 file changed, 37 insertions(+), 5 deletions(-)

(limited to 'code/fe310/eos/eve/screen/screen.c')

diff --git a/code/fe310/eos/eve/screen/screen.c b/code/fe310/eos/eve/screen/screen.c
index c65e8fc..52015be 100644
--- a/code/fe310/eos/eve/screen/screen.c
+++ b/code/fe310/eos/eve/screen/screen.c
@@ -5,7 +5,7 @@
 #include "eve_kbd.h"
 
 #include "screen.h"
-#include "tile.h"
+#include "window.h"
 
 int eve_screen_init(EVEScreen *screen, uint16_t w, uint16_t h) {
     memset(screen, 0, sizeof(EVEScreen));
@@ -29,11 +29,43 @@ void eve_screen_hide_kbd(EVEScreen *screen) {
     screen->kbd_active = 0;
 }
 
-void eve_screen_add_tile(EVEScreen *screen, EVETile *tile) {
-    if (screen->tile_size < EVE_MAX_TILES) {
-        screen->tile[screen->tile_size] = tile;
-        screen->tile_size++;
+int eve_screen_win_insert(EVEScreen *screen, EVEWindow *window, int idx) {
+    if (idx) {
+        int i;
+        EVEWindow *h = screen->win_head;
+
+        for (i=1; i<idx; i++) {
+            h = h->next;
+            if (h == NULL) return EVE_ERR;
+        }
+        window->next = h->next;
+        h->next = window;
+    } else {
+        window->next = screen->win_head;
+        screen->win_head = window;
     }
+    if (window->next == NULL) screen->win_tail = window;
+    return EVE_OK;
+}
+
+int eve_screen_win_remove(EVEScreen *screen, EVEWindow *window) {
+    EVEWindow *h = screen->win_head;
+    if (h == NULL) return EVE_ERR;
+    if (h == window) {
+        screen->win_head = window->next;
+        if (screen->win_head == NULL) screen->win_tail = NULL;
+    } else {
+        while (h->next && (h->next != window)) h = h->next;
+        if (h->next == NULL) return EVE_ERR;
+
+        h->next = window->next;
+        if (h->next == NULL) screen->win_tail = h;
+    }
+}
+
+void eve_screen_win_append(EVEScreen *screen, EVEWindow *window) {
+    screen->win_tail->next = window;
+    screen->win_tail = window;
 }
 
 void eve_screen_handle_touch(EVEScreen *screen, uint8_t tag0, int touch_idx) {
-- 
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