Differences

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--- ideas:radial-gradient-readability [2011/11/30 08:23] – [Alternate Proposal] fantasai
+++ ideas:radial-gradient-readability [2011/11/30 09:00] – [Latest Proposal] fantasai
@@ Line 2: / Line 2: @@
 We've agreed that radial gradients should have a literate syntax.  Linear gradients already kinda have one, in a simple way, and hopefully radials should end up thematically consistent.
-==== Current Proposal ====
+==== Latest Proposal ====
-  * for CSS3: ''radial-gradient(<shape> to <extent> at <position>, <colors>)''
+  * for CSS3: ''radial-gradient([ <extent> || <shape> ] at <position>, <colors>)''
-  * for CSS4: ''radial-gradient(<shape> to <extent> at <position> [from <position> | from-offset <length>{1,2}], <colors>)''
+  * for CSS4: ''radial-gradient([ <extent> || <shape> ] at <position> [from <position> | from-offset <length>{1,2}], <colors>)''
-Where <extent> is either a ''farthest/closest-side/corner'' keyword or an explicit ''<length>{1,2}''. Arguments after <shape> can be reordered; everything is optional.
+Here ''<extent>'' is either a ''farthest/closest-side/corner'' keyword or an explicit ''<length>{1,2}''. Example: ''radial-gradient(5em circle at 10% 15%, white, black)''
+Everything is optional except the colors. Examples: ''radial-gradient(5em, white, black)'', ''radial-gradient(circle, white, black)'', ''radial-gradient(at top left, white, black)'', ''radial-gradient(white, black)''.
 Because the default size is ''cover'', this means:
@@ Line 13: / Line 15: @@
   * ''radial-gradient(at 25% 25%, <colors>)'' makes the 0% color at 25% 25%, and the 100% color at a 25% 25%-centered box-covering ellipse.
-<html><a href="data:text/html;charset=utf-8,<!DOCTYPE%20html>%0A<div><%2Fdiv>%0A<div>%0A<style>%0Adiv%20%7B%20%0Awidth%3A%20200px%3B%0Aheight%3A%20200px%3B%0Aborder%3A%20thin%20solid%3B%0Afloat%3A%20left%3B%0Amargin%3A%2010px%3B%0A%7D%0Adiv%3Afirst-child%20%7B%20%0Abackground%3A%20-webkit-gradient(radial%2C%2025%25%2025%25%2C%200%2C%2050%25%2050%25%2C%20150%2C%20from(white)%2C%20to(black))%3B%0A%7D%0Adiv%3Anth-child(2)%20%7B%0Abackground%3A%20-webkit-gradient(radial%2C%2025%25%2025%25%2C%200%2C%2025%25%2025%25%2C%20225%2C%20from(white)%2C%20to(black))%3B%0A%7D">Examples</a></html> (view in webkit)
+<html><a href="data:text/html;charset=utf-8,<!DOCTYPE%20html>%0A<div><%2Fdiv>%0A<div>%0A<style>%0Adiv%20%7B%20%0Awidth%3A%20200px%3B%0Aheight%3A%20200px%3B%0Aborder%3A%20thin%20solid%3B%0Afloat%3A%20left%3B%0Amargin%3A%2010px%3B%0A%7D%0Adiv%3Afirst-child%20%7B%20%0Abackground%3A%20-webkit-gradient(radial%2C%2025%25%2025%25%2C%200%2C%2050%25%2050%25%2C%20150%2C%20from(white)%2C%20to(black))%3B%0A%7D%0Adiv%3Anth-child(2)%20%7B%0Abackground%3A%20-webkit-gradient(radial%2C%2025%25%2025%25%2C%200%2C%2025%25%2025%25%2C%20225%2C%20from(white)%2C%20to(black))%3B%0A%7D">Illustration of moving geometric center vs. moving color focus</a></html> (view in webkit)
 <html>
 <table rules="groups" class="data" cellpadding="5">
-<caption>Examples</caption>
+<caption>Syntax Comparison for Level 3</caption>
 <thead>
 <tr>
@@ Line 24: / Line 26: @@
 <th>Preview</th>
-<th><a href="http://dev.w3.org/cvsweb/~checkout~/csswg/css3-images/Overview.html?rev=1.200;content-type=text%2Fhtml">Current ED</a></th>
+<th><a href="http://dev.w3.org/cvsweb/~checkout~/csswg/css3-images/Overview.html?rev=1.200;content-type=text%2Fhtml">Latest ED</a></th>
 </tr>
 </thead>
@@ Line 36: / Line 38: @@
 <tr>
 <td><code>radial-gradient(center, farthest-corner ellipse, white, black)</code></td>
-<td><code>radial-gradient(ellipse to farthest-corner at center, white, black)</code></td>
+<td><code>radial-gradient(farthest-corner ellipse at center, white, black)</code></td>
 </tr>
@@ Line 49: / Line 51: @@
 <tr>
 <td><code>radial-gradient(top left, farthest-corner ellipse, white, black)</code></td>
-<td><code>radial-gradient(ellipse at top left to farthest-corner, white, black)</code></td>
+<td><code>radial-gradient(farthest-corner ellipse at top left, white, black)</code></td>
 </tr>
@@ Line 71: / Line 73: @@
 <td rowspan="2"><img src="http://lists.w3.org/Archives/Public/www-archive/2011Nov/att-0019/radial4.png"/>
 </td>
-<td><code>radial-gradient(to 5em, white, black)</code></td>
+<td><code>radial-gradient(5em, white, black)</code></td>
 </tr>
 <tr>
 <td><code>radial-gradient(center, 5em 5em, white, black)</code></td>
-<td><code>radial-gradient(circle to 5em at center, white, black)</code></td>
+<td><code>radial-gradient(circle 5em at center, white, black)</code></td>
 </tr>
 </tbody>
@@ Line 84: / Line 86: @@
 <td rowspan="2"><img src="http://lists.w3.org/Archives/Public/www-archive/2011Nov/att-0019/radial5.png"/>
 </td>
-<td><code>radial-gradient(circle at 75% 75% to closest-side, white, black)</code></td>
+<td><code>radial-gradient(closet-side circle at 75% 75%, white, black)</code></td>
 </tr>
 </tbody>
@@ Line 92: / Line 94: @@
 <td rowspan="2"><img src="http://lists.w3.org/Archives/Public/www-archive/2011Nov/att-0019/radial6.png"/>
 </td>
-<td><code>radial-gradient(ellipse to 15px 30% at 25% 2em, white, black)</code></td>
+<td><code>radial-gradient(15px 30% ellipse at 25% 2em, white, black)</code></td>
 </tr>
@@ Line 99: / Line 101: @@
 </html>
-==== Alternate Proposal ====
+==== Original Proposal ====
-Feedback on CSS3.info indicates that people find "to <length>" awkward. Since technically only one of <size> or <position> needs a keyword (for unambiguous parsing), fixed sizes could be combined with the shape keyword. This does mean that size must come before position (although either could be omitted).
-The alternate syntax would be ''radial-gradient([ <extent> || <shape> ] at <position>, <colors>)''.
+The original proposal was ''radial-gradient(<shape> to <extent> at <position>, <colors>)''. In this proposal all arguments after ''<shape>'' could be reordered. However, [[http://www.css3.info/radial-gradient-readability/|feedback on CSS3.info]] indicated that people find "to <length>" awkward, hence the Latest Proposal above.
 For example, ''radial-gradient(5em circle at 25% 50px, white, black)''