dialogue color improvement, implementation of print_multiline_text function.

src/ui/widget.c

@@ -0,0 +1,66 @@
+#include "widget.h"
+#include "../main.h"
+#include <ncurses.h>
+#include <stdint.h>
+#include <string.h>
+
+int32_t get_max_line_len(const char *text) {
+  uint32_t nl_pos = 0;  // new line position
+  uint32_t c_start = 0; // current line start position
+  uint32_t c_len = 0;   // current line length
+  uint32_t m_len = 0;   // max length
+  for (int i = 0; text[i] != '\0'; i++, c_len++) {
+    if (text[i] == '\n') {
+      if (i - nl_pos > c_len || !m_len) {
+        m_len = c_len;
+      }
+      nl_pos = i;
+      c_start = i + 1;
+      c_len = 0;
+    }
+  }
+  if (c_len > m_len) {
+    return c_len;
+  } else {
+    return m_len;
+  }
+}
+
+#define PRINT_TEXT(win, l_buf, text, i, c_line_len, win_width, line_v_pos,     \
+                   attrs)                                                      \
+  strncpy(l_buf, text + i - c_line_len, c_line_len);                           \
+  l_buf[c_line_len] = '\0';                                                    \
+  if ((attrs & PMT_ALIGN_CENTER) == PMT_ALIGN_CENTER) {                        \
+    mvwprintw(win, line_v_pos, (win_width - c_line_len) / 2, "%s", l_buf);     \
+  } else if (attrs & PMT_POS_CENTER) {                                         \
+    mvwprintw(win, line_v_pos, (win_width - m_line_len) / 2, "%s", l_buf);     \
+  } else {                                                                     \
+    mvwprintw(win, line_v_pos, x, "%s", l_buf);                                \
+  }
+
+uint32_t print_multiline_text(WINDOW *win, const char *text,
+                              const uint32_t win_width, const uint32_t y,
+                              const uint32_t x, const uint16_t attrs) {
+
+  uint16_t line_v_pos = y;
+  int32_t c_line_len = 0;
+  uint32_t m_line_len = 0;
+  uint32_t i = 0;
+  char l_buf[DIALOGUE_TEXT];
+
+  if (attrs & PMT_POS_CENTER) {
+    m_line_len = get_max_line_len(text);
+  }
+
+  for (; text[i]; i++, c_line_len++) {
+    if (text[i] == '\n') {
+      PRINT_TEXT(win, l_buf, text, i, c_line_len, win_width, line_v_pos, attrs)
+      c_line_len = -1;
+      line_v_pos++;
+    }
+  }
+
+  PRINT_TEXT(win, l_buf, text, i, c_line_len, win_width, line_v_pos, attrs)
+
+  return 1;
+}