1 files changed, 155 insertions, 0 deletions
diff --git a/src/field_message_box.c b/src/field_message_box.c
new file mode 100644
index 000000000..5eec7a14b
--- /dev/null
+++ b/src/field_message_box.c
@@ -0,0 +1,155 @@
+#include "global.h"
+#include "field_message_box.h"
+#include "menu.h"
+#include "string_util.h"
+#include "task.h"
+#include "text.h"
+#include "text_window.h"
+
+static EWRAM_DATA struct Window gFieldMessageBoxWindow = {0};
+
+static u8 sMessageBoxMode;
+
+static void Task_FieldMessageBox(u8 taskId);
+static void CreateFieldMessageBoxTask(void);
+static void DestroyFieldMessageBoxTask(void);
+static void PrintFieldMessage(const u8 *message);
+static void PrintFieldMessageFromStringVar4(void);
+
+void InitFieldMessageBox(void)
+{
+    sMessageBoxMode = FIELD_MESSAGE_BOX_HIDDEN;
+    TextWindow_SetDlgFrameBaseTileNum(gMenuTextWindowContentTileOffset);
+    Text_InitWindowWithTemplate(&gFieldMessageBoxWindow, &gWindowTemplate_81E6CE4);
+}
+
+static void Task_FieldMessageBox(u8 taskId)
+{
+    struct Task *task = &gTasks[taskId];
+    switch (task->data[0])
+    {
+    case 0:
+        TextWindow_LoadDialogueFrameTiles(&gFieldMessageBoxWindow);
+        task->data[0]++;
+        break;
+    case 1:
+        TextWindow_DrawDialogueFrame(&gFieldMessageBoxWindow);
+        task->data[0]++;
+        break;
+    case 2:
+        switch (sMessageBoxMode)
+        {
+        case FIELD_MESSAGE_BOX_NORMAL:
+            if (!Text_UpdateWindow(&gFieldMessageBoxWindow))
+                return;
+            break;
+        case FIELD_MESSAGE_BOX_AUTO_SCROLL:
+            if (!Text_UpdateWindowAutoscroll(&gFieldMessageBoxWindow))
+                return;
+            break;
+        }
+        sMessageBoxMode = FIELD_MESSAGE_BOX_HIDDEN;
+        DestroyTask(taskId);
+    }
+}
+
+static void CreateFieldMessageBoxTask(void)
+{
+    CreateTask(Task_FieldMessageBox, 80);
+}
+
+static void DestroyFieldMessageBoxTask(void)
+{
+    u8 taskId = FindTaskIdByFunc(Task_FieldMessageBox);
+    if (taskId != 0xFF)
+        DestroyTask(taskId);
+}
+
+bool8 ShowFieldMessage(const u8 *message)
+{
+    if (sMessageBoxMode != FIELD_MESSAGE_BOX_HIDDEN)
+    {
+        return FALSE;
+    }
+    else
+    {
+        PrintFieldMessage(message);
+        sMessageBoxMode = FIELD_MESSAGE_BOX_NORMAL;
+        return TRUE;
+    }
+}
+
+bool8 ShowFieldAutoScrollMessage(const u8 *message)
+{
+    if (sMessageBoxMode != FIELD_MESSAGE_BOX_HIDDEN)
+    {
+        return FALSE;
+    }
+    else
+    {
+        sMessageBoxMode = FIELD_MESSAGE_BOX_AUTO_SCROLL;
+        PrintFieldMessage(message);
+        return TRUE;
+    }
+}
+
+bool8 unref_sub_8064BB8(const u8 *message)
+{
+    sMessageBoxMode = FIELD_MESSAGE_BOX_AUTO_SCROLL;
+    PrintFieldMessage(message);
+    return TRUE;
+}
+
+bool8 unref_sub_8064BD0(const u8 *message)
+{
+    if (sMessageBoxMode != FIELD_MESSAGE_BOX_HIDDEN)
+    {
+        return FALSE;
+    }
+    else
+    {
+        sMessageBoxMode = FIELD_MESSAGE_BOX_NORMAL;
+        PrintFieldMessageFromStringVar4();
+        return TRUE;
+    }
+}
+
+static void PrintFieldMessage(const u8 *message)
+{
+    StringExpandPlaceholders(gStringVar4, message);
+    Text_InitWindow8002EB0(&gFieldMessageBoxWindow, gStringVar4, gMenuTextTileOffset, 2, 15);
+    CreateFieldMessageBoxTask();
+}
+
+static void PrintFieldMessageFromStringVar4(void)
+{
+    Text_InitWindow8002EB0(&gFieldMessageBoxWindow, gStringVar4, gMenuTextTileOffset, 2, 15);
+    CreateFieldMessageBoxTask();
+}
+
+void HideFieldMessageBox(void)
+{
+    DestroyFieldMessageBoxTask();
+    TextWindow_EraseDialogueFrame(&gFieldMessageBoxWindow);
+    sMessageBoxMode = FIELD_MESSAGE_BOX_HIDDEN;
+}
+
+u8 GetFieldMessageBoxMode(void)
+{
+    return sMessageBoxMode;
+}
+
+bool8 IsFieldMessageBoxHidden(void)
+{
+    if (sMessageBoxMode == FIELD_MESSAGE_BOX_HIDDEN)
+        return TRUE;
+    else
+        return FALSE;
+}
+
+void unref_sub_8064CA0(void)
+{
+    DestroyFieldMessageBoxTask();
+    TextWindow_DrawDialogueFrame(&gFieldMessageBoxWindow);
+    sMessageBoxMode = FIELD_MESSAGE_BOX_HIDDEN;
+}