Add 'justify' as an option for text alignment

[brianchirls]

Spaces text so each line fills the entire width.

There is one area I'd like to suggest for future improvement, which is how trailing lines are handled. In my experience, you don't want to justify the last line of a paragraph. (See, for example, Star Wars opening crawls.) To implement this properly, we'd need to know whether each line was forced to wrap or ended naturally by EOL or EOF. But https://github.com/mattdesl/word-wrapper strips that information out. So for now, I've chosen to justify only lines that take up 70% of the line width.

If @mattdesl would like to make a change to include an additional boolean in the output of word-wrapper, I'd be happy to make another commit or PR here.

[mattdesl]

Thanks! This is great.

I am wondering if there is a more robust algorithm we can apply here, or in the child word-wrapper module. Maybe using linebreak to handle proper Unicode line breaking. I have not read much about justify and 70% seems a bit arbitrary... is it standard? Are there some suggested algorithms for handling justify?

[brianchirls]

You're right. It is completely arbitrary and intended to be temporary until we come up with a better solution. I looked around at it seems the standard (at least per LibreOffice and CSS) is to have a secondary option for how the last line is handled. The last line can be set to left, right or justify (or for CSS, to match the start/end in case of right-to-left text). See https://devdocs.io/css/text-align-last So how do you know whether a line is the last line of a paragraph? I suppose you could check if it's the last line in your text or if the following line is empty. But I don't like that because you might not have empty lines. I think it's better for word-wrap to add a flag to each line that's true if the line was not forced to wrap - i.e. it's the end of the text or ends with a newline.

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On Mon, May 15, 2017 at 10:00 PM, Matt DesLauriers ***@***.*** > wrote: Thanks! This is great. I am wondering if there is a more robust algorithm we can apply here, or in the child word-wrapper module. Maybe using linebreak <https://www.npmjs.com/package/linebreak> to handle proper Unicode line breaking. I have not read much about justify and 70% seems a bit arbitrary... is it standard? Are there some suggested algorithms for handling justify? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#5 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAeDA0n0bdvZPXfkFQZklckMoYbBObhPks5r6QNOgaJpZM4NbyMz> .

[brianchirls]

@mattdesl I made a pull request over at word-wrapper. If you can review and accept that, I'll update this one to include better logic for aligning that last line. Thanks.