Function textReadLine

text.c:147–191

#define TAB_SIZE 4

static int textReadLine(char *buffer, int offset, int size, char *line) {
  // Get line
  int line_width = 0;
  int count = 0;

  int i;
  for (i = 0; i < MIN(size, MIN(size - offset, MAX_LINE_CHARACTERS - 1)); i++) {
    char ch = buffer[offset + i];
    char ch_width = 0;

    // Line break
    if (ch == '\n') {
      i++; // Skip it
      break;
    }

    // Tab
    if (ch == '\t') {
      ch_width = TAB_SIZE * font_size_cache[' '];
    } else {
      ch_width = font_size_cache[(int)ch];
      if (ch_width == 0) {
        ch = ' '; // Change invalid characters to space
        ch_width = font_size_cache[(int)ch];
      }
    }

    // Too long
    if ((line_width + ch_width) >= (MAX_WIDTH - TEXT_START_X + SHELL_MARGIN_X))
      break;

    // Increase line width
    line_width += ch_width;

    // Add to line string
    if (line)
      line[count++] = ch;
  }

  // End of line
  if (line)
    line[count] = '\0';

  return i;
}

static void updateTextEntry(TextEditorState *state, TextListEntry* entry, int rel_pos) {
  entry->line_number = state->base_pos + rel_pos;