commit

src/textbox.c

@@ -0,0 +1,85 @@
+/**
+ * Copyright (c) 2022 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "textbox.h"
+
+char *TEXTBOX_TEXT;
+uint8_t TEXTBOX_TEXT_LENGTH;
+uint8_t TEXTBOX_STATE;
+uint8_t TEXTBOX_SCROLL;
+
+
+void textboxInit() {
+  TEXTBOX_TEXT = NULL;
+  TEXTBOX_STATE = 0;
+  TEXTBOX_TEXT_LENGTH = 0;
+  TEXTBOX_SCROLL = 0;
+  move_win(7, SCREENHEIGHT - (TEXTBOX_TILES_ROWS * 8));
+
+  set_win_data(TEXTBOX_TILES_DATA_POSITION, FONT_TILE_COUNT, FONT_DATA);
+}
+
+void textboxSetText(char *text, uint8_t length) {
+  uint8_t tiles[TEXTBOX_TILES_MAX];
+  uint8_t i;
+
+  TEXTBOX_TEXT = text;
+  TEXTBOX_TEXT_LENGTH = length;
+  TEXTBOX_STATE = TEXTBOX_STATE_VISIBLE;
+  TEXTBOX_SCROLL = 0;
+
+  for(i = 0; i < TEXTBOX_TILES_MAX; i++) tiles[i] = TEXTBOX_TILE_BLANK;
+
+  set_win_tiles(0, 0, TEXTBOX_TILES_PER_ROW, TEXTBOX_TILES_ROWS, tiles);
+  SHOW_WIN;
+}
+
+void textboxClose() {
+  TEXTBOX_STATE &= ~TEXTBOX_STATE_VISIBLE;
+  HIDE_WIN;
+}
+
+void textboxUpdate() {
+  uint8_t tiles[TEXTBOX_TILES_MAX];
+  uint8_t i, j;
+
+  if(!(TEXTBOX_STATE & TEXTBOX_STATE_VISIBLE)) return;
+  if(TEXTBOX_STATE & TEXTBOX_STATE_SCROLLED) {
+    return;
+  }
+
+  TEXTBOX_SCROLL++;
+  j = 0;
+  for(i = 0; i < TEXTBOX_SCROLL; i++) {
+    if(TEXTBOX_TEXT[i] == ' ') {
+      j++;
+      continue;
+    }
+    if(TEXTBOX_TEXT[i] == '\n') {
+      j = TEXTBOX_TILES_PER_ROW;
+      continue;
+    }
+    tiles[j] = TILE_FROM_CHAR(TEXTBOX_TEXT[i]);
+    j++;
+  }
+
+
+  for(i = j; i < TEXTBOX_TILES_MAX; i++) {
+    tiles[i] = TEXTBOX_TILE_BLANK;
+  }
+
+  set_win_tiles(
+    0, 0,
+    TEXTBOX_TILES_PER_ROW,
+    TEXTBOX_TILES_ROWS,
+    tiles
+  );
+
+  if(TEXTBOX_SCROLL == TEXTBOX_TEXT_LENGTH) {
+    TEXTBOX_STATE |= TEXTBOX_STATE_SCROLLED;
+  }
+}