Fold Function

functions.py

def fold(content, width=128):
    '''
    Fold content such that each line is no longer than 'width'
        - breaks only at complete words
        - if a word in the content exceeds `width`
            - added as a separate line
            - a warning is shown

    similar to linux command "fold -w `width` -s"
    except in the cases where there are spaces on the line boundaries
    '''
    lines = content.split('\n')
    folds = []
    for line in lines:
        if len(line) > width:
            words = line.split()
            linesplits = []
            curr_len = 0
            curr_line = ''
            idx = 0
            while idx < len(words):
                is_nonempty = int(bool(curr_line))
                new_len = curr_len + len(words[idx]) + is_nonempty
                if new_len <= width:
                    curr_line += ' ' * is_nonempty + words[idx]
                    curr_len = new_len
                    idx += 1
                else:
                    curr_len = 0
                    if curr_line:
                        linesplits.append(curr_line.strip())
                        curr_line = ''
                    if len(words[idx]) > width:
                        print(f"Warning: '{words[idx]}' longer than {width}.")
                        linesplits.append(words[idx])
                        idx += 1
                        continue
            linesplits.append(curr_line.strip())
            folds.append('\n'.join(linesplits))
        else:
            folds.append(line)
    output = '\n'.join(folds)
    return output

Thanks for your work on transliteration. I am interested Transliteration to different Indian scripts. Transliteration is extremely helpful for people to read Sanskrit, Hindi and other language songs in different scripts. Users should be able to type or copy and paste or upload text file and choose Transliteration action. The output should be able to be downloaded as a file.