--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/core/message.h	Tue Jan 21 12:42:33 2020 +0100
@@ -0,0 +1,110 @@
+/*
+ * message.h -- 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.
+ */
+
+#ifndef MOLKO_MESSAGE_H
+#define MOLKO_MESSAGE_H
+
+/**
+ * \file message.h
+ * \brief Message dialog.
+ */
+
+#include <stdbool.h>
+
+struct sprite;
+struct font;
+
+/**
+ * \brief Message flags.
+ */
+enum message_flags {
+	MESSAGE_AUTOMATIC = (1 << 0)    /*!< Message will automatically close */
+};
+
+/**
+ * \brief Message state.
+ */
+enum message_state {
+	MESSAGE_OPENING,                /*!< Message animation is opening */
+	MESSAGE_SHOWING,                /*!< Message is displaying */
+	MESSAGE_HIDING                  /*!< Message animation for hiding */
+};
+
+/**
+ * \brief Message object.
+ */
+struct message {
+	const char *text[3];            /*!< (RW) lines of text to show */
+	struct sprite *theme;           /*!< (RW) sprite to use for the frame */
+	struct texture *avatar;         /*!< (RW) optional avatar */
+	struct font *font;              /*!< (RW) font to use */
+	enum message_flags flags;       /*!< (RW) message flags */
+	enum message_state state;       /*!< (RO) current state */
+	unsigned int elapsed;           /*!< (RW) elapsed time while displaying */
+};
+
+/**
+ * Start opening the message. This function will reset the message state and
+ * elapsed time.
+ *
+ * \pre msg != NULL
+ * \param msg the message
+ */
+void
+message_start(struct message *msg);
+
+/**
+ * Update the message state and elapsed time..
+ *
+ * \pre msg != NULL
+ * \param msg the message
+ * \param ticks the elapsed delay since last frame
+ */
+void
+message_update(struct message *msg, unsigned int ticks);
+
+/**
+ * Draw the message into the screen.
+ *
+ * \pre msg != NULL
+ * \param msg the message
+ */
+void
+message_draw(struct message *msg);
+
+/**
+ * Start hiding the message.
+ *
+ * \pre msg != NULL
+ * \param msg the message
+ * \note You should still continue to draw the message as the animation is not
+ *       finished!
+ */
+void
+message_hide(struct message *msg);
+
+/**
+ * Tells if the message is complete.
+ *
+ * \pre msg != NULL
+ * \param msg the message
+ */
+bool
+message_is_complete(struct message *msg);
+
+#endif /* !MOLKO_MESSAGE_H */