1 files changed, 116 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..e49897f
--- /dev/null
+++ b/code/fe310/eos/eve/screen/window.c
@@ -0,0 +1,116 @@
+#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;
+    if (view) {
+        window->view = view;
+        window->view->window = window;
+    }
+    window->screen = screen;
+    window->color_fg = 0xffffff;
+}
+
+void eve_window_set_color_bg(EVEWindow *window, uint8_t r, uint8_t g, uint8_t b) {
+    window->color_bg = (r << 16) | (g << 8) | b;
+}
+
+void eve_window_set_color_fg(EVEWindow *window, uint8_t r, uint8_t g, uint8_t b) {
+    window->color_fg = (r << 16) | (g << 8) | b;
+}
+
+int eve_window_visible(EVEWindow *window) {
+    if (window->g.x >= window->screen->w) return 0;
+    if (window->g.y >= window->screen->h) return 0;
+    if ((window->g.x + window->g.w) <= 0) return 0;
+    if ((window->g.y + window->g.h) <= 0) return 0;
+    return 1;
+}
+
+void eve_window_visible_g(EVEWindow *window, EVERect *g) {
+    EVEWindow *w = window->next;
+
+    *g = window->g;
+    while (w) {
+        if (eve_window_visible(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;
+    }
+}
+
+void eve_window_append(EVEWindow *window) {
+    EVEScreen *screen = window->screen;
+
+    window->prev = screen->win_tail;
+    if (screen->win_tail) {
+        screen->win_tail->next = window;
+    } else {
+        screen->win_head = window;
+    }
+    screen->win_tail = window;
+}
+
+void eve_window_insert_above(EVEWindow *window, EVEWindow *win_prev) {
+    EVEScreen *screen = window->screen;
+
+    window->prev = win_prev;
+    window->next = win_prev->next;
+
+    if (window->next) {
+        window->next->prev = window;
+    } else {
+        screen->win_tail = window;
+    }
+    win_prev->next = window;
+}
+
+void eve_window_insert_below(EVEWindow *window, EVEWindow *win_next) {
+    EVEScreen *screen = window->screen;
+
+    window->prev = win_next->prev;
+    window->next = win_next;
+
+    win_next->prev = window;
+    if (window->prev) {
+        window->prev->next = window;
+    } else {
+        screen->win_head = window;
+    }
+}
+
+void eve_window_remove(EVEWindow *window) {
+    EVEScreen *screen = window->screen;
+
+    if (window->prev) {
+        window->prev->next = window->next;
+    } else {
+        screen->win_head = window->next;
+    }
+    if (window->next) {
+        window->next->prev = window->prev;
+    } else {
+        screen->win_tail = window->prev;
+    }
+}