From eb9d51223385e787950a5ed926f7fd0c59b7ff9f Mon Sep 17 00:00:00 2001
From: Dominic Masters <dominic@domsplace.com>
Date: Sun, 18 Jul 2021 14:53:36 -0700
Subject: [PATCH] Added closed state flag to bntextbox

---
 include/dawn/vn/gui/vntextbox.h |  5 +++++
 src/vn/gui/vntextbox.c          | 34 +++++++++++++++++++++++++--------
 src/vn/gui/vntextbox.h          | 11 +++++++++++
 3 files changed, 42 insertions(+), 8 deletions(-)

diff --git a/include/dawn/vn/gui/vntextbox.h b/include/dawn/vn/gui/vntextbox.h
index 51d1d020..7e72f0be 100644
--- a/include/dawn/vn/gui/vntextbox.h
+++ b/include/dawn/vn/gui/vntextbox.h
@@ -13,6 +13,8 @@
 /** Amount of characters scrolled, per second */
 #define VN_TEXTBOX_SCROLL_SPEED 60
 
+#define VN_BOX_STATE_CLOSED 0x01
+
 typedef struct {
   /** Stores the maximum width that this textbox can take up */
   float widthMax;
@@ -20,6 +22,9 @@ typedef struct {
   /** Font that the text box uses */
   font_t *font;
 
+  /** Box State Flags */
+  uint8_t state;
+
   /** How many rows of text at most can be displayed in a single text box */
   int32_t linesMax;
   int32_t lineCurrent;
diff --git a/src/vn/gui/vntextbox.c b/src/vn/gui/vntextbox.c
index a71bd1b5..1174eb77 100644
--- a/src/vn/gui/vntextbox.c
+++ b/src/vn/gui/vntextbox.c
@@ -12,9 +12,9 @@ void vnTextBoxInit(vntextbox_t *box, font_t *font) {
   box->widthMax = 400;
   box->text = NULL;
   box->x = 0, box->y = 0;
-
   box->linesMax = 3;
   box->lineCurrent = 0;
+  box->state = 0;
 }
 
 void vnTextBoxRebuffer(vntextbox_t *box) {
@@ -43,23 +43,35 @@ void vnTextBoxRebuffer(vntextbox_t *box) {
 
 void vnTextBoxUpdate(vntextbox_t *box, engine_t *engine) {
   int32_t i;
+  if(box->state & VN_BOX_STATE_CLOSED > 0) return;
 
   // "Next text box"
-  if(vnTextBoxHasScrolled(box) && box->linesMax > 0) {
-    if(!inputIsPressed(&engine->input, INPUT_ACCEPT)) return;
-    box->lineCurrent += box->linesMax;
+  if(!vnTextBoxHasScrolled(box)) {
+    i = inputIsDown(&engine->input, INPUT_ACCEPT) ? 2 : 1;
+    box->textScroll += engine->time.delta  * VN_TEXTBOX_SCROLL_SPEED * i;
     return;
   }
 
-  i = inputIsDown(&engine->input, INPUT_ACCEPT) ? 2 : 1;
-  box->textScroll += engine->time.delta  * VN_TEXTBOX_SCROLL_SPEED * i;
-  // timelineUpdate(&box->animTimeline, engine->time.delta);
+  if(!inputIsPressed(&engine->input, INPUT_ACCEPT)) return;
+
+  if(vnTextBoxCanBeClosed(box)) {
+    // Box can be closed.
+    printf("Box Closed");
+    box->state |= VN_BOX_STATE_CLOSED;
+    return;
+  }
+
+  // In theory this is always false
+  if(box->linesMax < 1) return;
+
+  // More lines to scroll
+  box->lineCurrent += box->linesMax;
 }
 
 void vnTextBoxRender(vntextbox_t *box, shader_t *shader) {
   int32_t charStart, charCount;
   float yOffset;
-  if(box->text == NULL) return;
+  if(box->text == NULL || box->state & VN_BOX_STATE_CLOSED > 0) return;
 
   // Determine where we're rendering the indices up to.
   charCount = box->textScroll;
@@ -118,4 +130,10 @@ bool vnTextBoxHasScrolled(vntextbox_t *box) {
   }
 
   return currentChar > box->textInfo.realLength;
+}
+
+bool vnTextBoxCanBeClosed(vntextbox_t *box) {
+  if(!vnTextBoxHasScrolled(box)) return false;
+  if(box->linesMax < 1) return true;
+  return box->lineCurrent + box->linesMax >= box->textInfo.lineCount;
 }
\ No newline at end of file
diff --git a/src/vn/gui/vntextbox.h b/src/vn/gui/vntextbox.h
index 3a7e84cc..fcc86fb8 100644
--- a/src/vn/gui/vntextbox.h
+++ b/src/vn/gui/vntextbox.h
@@ -59,3 +59,14 @@ void vnTextBoxDispose(vntextbox_t *box);
  * @return True if the text box has finished scrolling.
  */
 bool vnTextBoxHasScrolled(vntextbox_t *box);
+
+/**
+ * Returns true when the next key press will cause the text box to close. For
+ * cases when there's a line limit this would imply a user has visited all the
+ * lines, for all other cases this would be when the text has finished the
+ * scrolling.
+ * 
+ * @param box Box to check.
+ * @return True if the next accept input will close the text box.
+ */
+bool vnTextBoxCanBeClosed(vntextbox_t *box);
\ No newline at end of file