Loooong wordwrap

ruby-talk
1

Hi all,

I'm certainly finding this a fun challenge but wanted to know if anyonw
can help

I'm trying to wrap long words that have no spaces, but only the
application is a game and I need to wrap a word based on its true pixel
font width and place this into an array of lines, only that I pass to
method the width in pixels that I need to wrap against.

for a game I;m trying to build (Gosu lib)

font.text_width is the true pixel length of the string
width is in pixels
text is a string

i.e.

def wordwrap(text,width,font)
    words = text.split(' ')
    lines = [words.shift]
    words.each do |word|
      if font.text_width("#{lines[-1]} #{word}") < width
        lines[-1] << ' ' << word
      else

        lines.push(word)
      end
    end

####I have loooooooooong word that needs wrapping
    if (text.index(' ').nil? and font.text_width(text) > width)

            ## I need to chop the string into parts so I have an array
of lines all measuring the "width" pixel width

    end

end

Could somebody help, I really have tried many ways and coming from PHP
I'm not too sure of how to do this in Ruby

Thanks!!
Art

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2

Also this method wordwrap is called everysingle keystroke and 60 times a
second (60 FPS) not like a web app where you would call the method after
the user has finised entering the text. so its a little tricky!!

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3

I'm not sure how that makes sense. Ok, yes, after every keystroke, but if the
method is too much, couldn't you cache the resultant image, or triangles, or
scene, or even just text, until the user presses another key?

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On Sunday 30 August 2009 09:51:57 pm Arthur Rats wrote:

Also this method wordwrap is called everysingle keystroke and 60 times a
second (60 FPS)

4

def wordwrap(textinput,width,font)
    lines=[]
    if (textinput.text.index(' ').nil? and
font.text_width(textinput.text) > width)
        no_lines=font.text_width(textinput.text)/width
        b = no_lines.ceil
        no_chars=textinput.caret_pos
        no_each_line=(textinput.caret_pos / b).ceil
        for i in 1..b do
          if i < b
          lines.push(textinput.text.slice((i-1)*no_each_line.to_i,no_each_line))
          else
          lines.push(textinput.text.slice((i-1)*no_each_line.to_i,no_each_line+b))
          end
        end
    else

        words = textinput.text.split(' ')
        lines = [words.shift]
        words.each do |word|
          if font.text_width("#{lines[-1]} #{word}") < width
            lines[-1] << ' ' << word
          else
            lines.push(word)
          end
        end
    end
    return lines
  end

something like this - is what I need to do but I am chopping the text in
to equal parts to make it fit into lines within the box,

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