--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/message.c	Fri Jan 10 13:30:01 2020 +0100
@@ -0,0 +1,101 @@
+/*
+ * message.c -- message dialog
+ *
+ * Copyright (c) 2020 David Demelier <markand@malikania.fr>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <assert.h>
+
+#include "font.h"
+#include "texture.h"
+#include "message.h"
+#include "sprite.h"
+#include "window.h"
+
+#define MESSAGE_SPEED   1000    /* Time delay for animations */
+#define MESSAGE_TIMEOUT 5000    /* Time for auto-closing */
+
+void
+message_start(struct message *msg)
+{
+	assert(msg);
+
+	msg->elapsed = 0;
+	msg->state = MESSAGE_OPENING;
+}
+
+void
+message_update(struct message *msg, unsigned ticks)
+{
+	assert(msg);
+
+	msg->elapsed += ticks;
+
+	switch (msg->state) {
+	case MESSAGE_OPENING:
+		if (msg->elapsed >= MESSAGE_SPEED)
+			msg->state = MESSAGE_SHOWING;
+		break;
+	case MESSAGE_SHOWING:
+		/* Do automatically switch state if requested by the user. */
+		if (msg->flags & MESSAGE_AUTOMATIC && msg->elapsed >= MESSAGE_TIMEOUT)
+			msg->state = MESSAGE_HIDING;
+
+		break;
+	default:
+		break;
+	}
+}
+
+void
+message_draw(struct message *msg)
+{
+	assert(msg);
+
+	/* TODO: more constant variables. */
+	struct texture *lines[3];
+	int x = 160;
+	int y = 80;
+
+	window_set_color(0xff0000ff);
+	window_draw_rectangle(true, x, y, 960, 160);
+
+	for (int i = 0; msg->text[i]; ++i) {
+		lines[i] = font_render(msg->font, msg->text[i], 0xffffffff);
+
+		if (!lines[i])
+			continue;
+
+		texture_draw(lines[i], x, y);
+		texture_close(lines[i]);
+		y += 53;
+	}
+}
+
+void
+message_hide(struct message *msg)
+{
+	assert(msg);
+
+	msg->elapsed = 0;
+}
+
+bool
+message_is_complete(struct message *msg)
+{
+	assert(msg);
+
+	return msg->state == MESSAGE_HIDING && msg->elapsed >= MESSAGE_SPEED;
+}