[css-d] CSS parser for Microsoft .NET
This is to tell you that I have written a CSS parser component (a programming library) for Microsoft .NET. It implements parsing of a stylesheet, and also implements the specificity and inheritance calculations to determine what CSS rules and property values are applicable to each element in a DOM. For further details, see http://www.modeltext.com/css/ You'll find it useful if you develop .NET software and have an application in which you want to parse CSS. It's notable in being one of only two CSS parsers for .NET that I know of, the other one being http://www.codeproject.com/KB/recipes/CSSParser.aspx Regards, Christopher Wells __ css-discuss [cs...@lists.css-discuss.org] http://www.css-discuss.org/mailman/listinfo/css-d List wiki/FAQ -- http://css-discuss.incutio.com/ List policies -- http://css-discuss.org/policies.html Supported by evolt.org -- http://www.evolt.org/help_support_evolt/
Re: [css-d] The white-space property between blocks
On Tue, Jul 6, 2010 at 9:24 PM, Christopher Wells cwel...@gmail.com wrote: Are you saying then, about whitespace between blocks, that: Is that the way in which whitespace between blocks is removed? Is the whitespace only removed (or rather, hidden or not displayed) by the CSS/layout/rendering process, and not removed by the HTML/parsing/DOM process? The following line from [Anonymous inline boxes][1] appears to confirm that: White space content that would subsequently be collapsed away according to the 'white-space' property does not generate any anonymous inline boxes. Thank you for your help. Christopher [1]: http://www.w3.org/TR/CSS2/visuren.html#anonymous __ css-discuss [cs...@lists.css-discuss.org] http://www.css-discuss.org/mailman/listinfo/css-d List wiki/FAQ -- http://css-discuss.incutio.com/ List policies -- http://css-discuss.org/policies.html Supported by evolt.org -- http://www.evolt.org/help_support_evolt/
[css-d] The white-space property between blocks
Is the CSS 'white-space' property supposed to be able to affect the whitespace between block elements? For example, in the document used as an example in [Whitespace in the DOM][1] as follows, there is whitespace between the `/h1` and the `p`: !-- My document -- html head titleMy Document/title /head body h1Header/h1 p Paragraph /p /body /html This whitespace is normally removed; for example, [the XHTML spec says that a conforming user agent must meet all of the following criteria][2]: In elements where the 'xml:space' attribute is set to 'preserve', the user agent must leave all whitespace characters intact (with the exception of leading and trailing whitespace characters, which should be removed). Otherwise, whitespace is handled according to the following rules: * All whitespace surrounding block elements should be removed. * Leading and trailing whitespace inside a block element must be removed. * Line feed characters within a block element must be converted into a space (except when the 'xml:space' attribute is set to 'preserve'). * A sequence of white space characters must be reduced to a single space character (except when the 'xml:space' attribute is set to 'preserve'). My questions are as follows: * If I use the [CSS white-space property][3] on the `body`, should this be able to preserve the whitespace between block elements (e.g. between the `/h1` and the `p`)? Or is whitespace between blocks always removed, with the white-space property only affecting whitespace within blocks? * The XHTML spec says that a `body` [cannot directly contain PCDATA][4] (i.e. text). Does that mean that whitespace (being a kind of text) that's a direct child of the `body` tag is always insignificant/ignored, and cannot be enabled via CSS? If yes and whitespace between the `/h1` and the `p` in the above example were ignored because it's a direct child of the `body`, would/should that whitespace still be ignored if there were a `div style=white-space: pre` immediately within the `body` and enclosing all the other elements? * [The 'white-space' processing model][5] starts with, Any text that is directly contained inside a block element (not inside an inline element) should be treated as an anonymous inline element. What should I understand about pure whitespace (whitespace with no text)? * Is there a rule (and if so, where is this rule defined) about removing whitespace within inline elements? For example in the following sequence `pThe strong lazy /strong dog./p` should the whitespace after the `strong` tag be removed? (The HTML 4 spec has [a rule about this for line breaks][6]; I was wondering whether this rule also applied to other, non-line-beak whitespace, and whether this rule is mentioned/defined/allowed/assumed in any XHTML or CSS specification.) I'm more interested in what I'm supposed to understand from the (present and/or future CSS and/or HTML and/or XHTML) specs than I am in knowing how well if at all the various browser versions implement those specs. [1]: https://developer.mozilla.org/en/whitespace_in_the_dom [2]: http://www.w3.org/TR/2000/WD-xhtml-modularization-2105/conformance.html#s_conform_user_agent [3]: http://www.w3.org/TR/CSS2/text.html#white-space-prop [4]: http://www.w3.org/TR/2001/REC-xhtml-modularization-20010410/abstract_modules.html#s_structuremodule [5]: http://www.w3.org/TR/CSS2/text.html#white-space-model [6]: http://www.w3.org/TR/html401/appendix/notes.html#notes-line-breaks __ css-discuss [cs...@lists.css-discuss.org] http://www.css-discuss.org/mailman/listinfo/css-d List wiki/FAQ -- http://css-discuss.incutio.com/ List policies -- http://css-discuss.org/policies.html Supported by evolt.org -- http://www.evolt.org/help_support_evolt/
Re: [css-d] The white-space property between blocks
On Tue, Jul 6, 2010 at 2:03 PM, Philippe Wittenbergh e...@l-c-n.com wrote: 16.6.1 The 'white-space' processing model provides the answer http://www.w3.org/TR/CSS21/text.html#white-space-model (second list) Are you saying then, about whitespace between blocks, that: 1. Whitespace between blocks is like text, in that it's treated as an anonymous inline element (even if the DOM doesn't permit non-whitespace text in this location, e.g. between a ul and a li). 2. That whitespace between blocks is usually (unless white-space has a non-default value) then condensed to a single space. 3. The browser begins to render the single space, by laying it out as a line on its own (between the two blocks) 4. The space is removed during the line layout (because it's at the beginning of the line) 5. The line now contains nothing, so the line layout is aborted and/or the line is given zero height? Is that the way in which whitespace between blocks is removed? Is the whitespace only removed (or rather, hidden or not displayed) by the CSS/layout/rendering process, and not removed by the HTML/parsing/DOM process? I used to think that whitespace was also removed by the parser before it reaches the DOM, e.g. as described in item 9 of the [XHTML Family User Agent Conformance][1] specification but apparently I was wrong, and it is not removed by the parsing from the DOM: [Why is xml:space set to 'preserve' on all elements of XHTML?][2] for XHTML2 explains that 'all elements are set to xml:space=preserve in XHTML2, otherwise the CSS 'whitespace' property would have no effect'. * Is there a rule (and if so, where is this rule defined) about removing whitespace within inline elements? For example in the following sequence `pThe strong lazy /strong dog./p` should the whitespace after the `strong` tag be removed? (The HTML 4 spec has [a rule about this for line breaks][6]; I was wondering whether this rule also applied to other, non-line-beak whitespace, and whether this rule is mentioned/defined/allowed/assumed in any XHTML or CSS specification.) Again, refer to 16.6.1, more particularly, the first ordered list, point 4.2 So the following are all valid and display identically: `pThe strong lazy /strong dog./p` `pThe stronglazy/strong dog./p` `pThestrong lazy /strongdog./p` And the reason why they're the same is that the consecutive spaces are collapsed (even when they belong to different/adjacent inline text runs). Do text nodes in the parsed DOM still contain all the original whitespace characters? For example, do the text nodes have values like The and lazy ? Do the DOM Node.normalize() and Document.normalizeDocument() have any effect on the whitespace: do they trim, collapse or remove extraneous whitespace from the text nodes? Thanks, Christopher --- Christopher Wells http://www.modeltext.com/html/ [1]: http://www.w3.org/TR/2000/WD-xhtml-modularization-2105/conformance.html#s_conform_user_agent [2]: http://www.w3.org/MarkUp/2004/xhtml-faq#xmlspace __ css-discuss [cs...@lists.css-discuss.org] http://www.css-discuss.org/mailman/listinfo/css-d List wiki/FAQ -- http://css-discuss.incutio.com/ List policies -- http://css-discuss.org/policies.html Supported by evolt.org -- http://www.evolt.org/help_support_evolt/
