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Re: [css-text-decor] not underlining trailing spaces

From: Florian Rivoal <florian@rivoal.net>
Date: Thu, 12 Mar 2015 14:35:41 +0100
Cc: fantasai <fantasai.lists@inkedblade.net>, Koji Ishii <kojiishi@gmail.com>
Message-Id: <8283F7A2-0368-4889-A599-A9E7580C43F6@rivoal.net>
To: www-style list <www-style@w3.org>

> On 09 Mar 2015, at 17:45, Florian Rivoal <florian@rivoal.net> wrote:
> If you have "text-decoration: underline;" and "white-space: pre-wrap;" (or pre)
> all the (non collapsed) white space is underlined, including the spaces at the end of the line that are followed by a break/wrap point.
> http://jsbin.com/bedefu/1/watch?html,css,output
> That is what I'd expect based on the spec, but it may not be the ideal behavior in all cases. For instance, word processors / rich text editors don't do this, and if you're making a web based rich text editor using contenteditable and the like, you would want to match.
> MS Word, LibreOffice, Apple Page or Apple TextEdit all do the same in this case: underline the spaces between the words, but not those at the end of the line.
> We should probably not try to change the default behavior, given that:
> - We have interop on the current behavior
> - In other contexts, the current behavior may actually be what you want (for example, underlines caused by syntax highlighting in vim matches what we currently do).
> However, I do think this would be worth supporting. Adding "trailing-spaces" as a new value to the text-decoration-skip would be ideal for this.

We've resolved to do this, so here's a pull request to make it happen:


Since specifying trailing-spaces together with spaces doesn't do anything different from just adding spaces, I've added the new value as:

text-decoration-skip: none | [ objects || [ spaces | trailing-spaces ] || ink || edges || box-decoration ]

rather than

text-decoration-skip: none | [ objects || spaces || trailing-spaces || ink || edges || box-decoration ]

Also, should we consider making the initial value ''objects trailing-spaces'' rather than just ''objects''? Or maybe ''auto'' which let's UAs pick between the two depending on what they doing with properties like 'white-space', 'word-wrap', etc?

 - Florian
Received on Thursday, 12 March 2015 13:36:05 UTC

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