1 files changed, 39 insertions, 0 deletions
diff --git a/code/fe310/eos/eve/screen/window.c b/code/fe310/eos/eve/screen/window.c
new file mode 100644
index 0000000..8341e8a
--- /dev/null
+++ b/code/fe310/eos/eve/screen/window.c
@@ -0,0 +1,39 @@
+#include <stdlib.h>
+#include <string.h>
+
+#include "eve.h"
+#include "eve_kbd.h"
+
+#include "screen.h"
+#include "window.h"
+
+#define MIN(X, Y)           (((X) < (Y)) ? (X) : (Y))
+
+void eve_window_init(EVEWindow *window, EVERect *g, EVEView *view, EVEScreen *screen) {
+    memset(window, 0, sizeof(EVEWindow));
+
+    if (g) window->g = *g;
+    window->view = view;
+    window->screen = screen;
+}
+
+void eve_window_get_visible(EVEWindow *window, EVERect *g) {
+    EVEWindow *w = window->next;
+
+    *g = window->g;
+    while (w) {
+        if (w->g.x > g->x) g->w = MIN(g->w, w->g.x - g->x);
+        if (w->g.y > g->y) g->h = MIN(g->h, w->g.y - g->y);
+        if (w->g.x + w->g.w < g->x + g->w) {
+            uint16_t x0 = g->w - MIN(g->w, (g->x + g->w) - (w->g.x + w->g.w));
+            g->x += x0;
+            g->w -= x0;
+        }
+        if (w->g.y + w->g.h < g->y + g->h) {
+            uint16_t y0 = g->h - MIN(g->h, (g->y + g->h) - (w->g.y + w->g.h));
+            g->y += y0;
+            g->h -= y0;
+        }
+        w = w->next;
+    }
+}