Block Text Generator

Text blocks serve critical roles in source code documentation, configuration files, and plain-text communication where visual hierarchy must be achieved without rich formatting. Poorly constructed comment headers lead to misaligned characters across different editors, broken ASCII art when fonts lack monospace consistency, and maintenance headaches when block dimensions require manual recalculation. This generator computes exact character positions using the formula padLeft = floor((W − L) ÷ 2) where W represents inner width and L represents line length, ensuring pixel-perfect centering regardless of content length.

The tool employs Unicode box-drawing characters from the U+2500 block, which render consistently across modern terminals, IDEs, and text editors supporting UTF-8. Edge cases include handling tabs (converted to spaces), preserving intentional trailing whitespace, and managing zero-width joiners that corrupt character counts. Output validates against the constraint totalWidth = borderLeft + paddingLeft + contentWidth + paddingRight + borderRight, preventing off-by-one errors that plague manual block construction.

Block text generation requires precise character positioning to maintain alignment across variable-width content. The core layout follows a box model where total width equals the sum of all horizontal components.

Where b_L and b_R represent border character widths (typically 1), p_L and p_R represent padding spaces, and W_content is the inner text area width.

Center alignment distributes remaining space equally. The floor function ensures integer character counts, with any odd-character remainder added to the right padding.

Word wrapping employs a greedy algorithm that iterates through words, accumulating them until adding the next word would exceed the maximum width constraint.

The 1 accounts for the space character between words. Lines exceeding the maximum width with a single word are forcibly broken at the character level to prevent overflow.