形状外部 | shape-outside

shape-outside

这是一个实验技术

在使用此产品之前，请仔细检查浏览器兼容性表。

该shape-outside CSS属性使用形状值来定义浮动区域的浮动，这将使得内联内容会环绕着形状，而不是产生浮动的边框。

/* Keyword values */
shape-outside: none;
shape-outside: margin-box;
shape-outside: content-box;
shape-outside: border-box;
shape-outside: padding-box;

/* Function values */
shape-outside: circle(
shape-outside: ellipse(
shape-outside: inset(10px 10px 10px 10px
shape-outside: polygon(10px 10px, 20px 20px, 30px 30px

/* <url> value */
shape-outside: url(image.png

/* Gradient value */
shape-outside: linear-gradient(45deg, rgba(255, 255, 255, 0) 150px, red 150px

/* Global values */
shape-outside: initial;
shape-outside: inherit;
shape-outside: unset;

Initial value	none
Applies to	floats
Inherited	no
Media	visual
Computed value	as defined for <basic-shape> (with <shape-box> following, if supplied), the <image> with its URI made absolute, otherwise as specified.
Animation type	yes, as specified for <basic-shape>, otherwise no
Canonical order	the unique non-ambiguous order defined by the formal grammar

语法

可用值

none——浮动区域不受影响。

插值

为了在两个基本形状之间进行插值（interpolating），应用下面的规则。形状函数中的值在插入时看做一个简单列表。列表值可能作为长度、百分比或者是计算值进行插入。如果列表值不属于上述类型中的任何一个，但是是相同的（例如nonzero在两个列表中找到相同的列表位置），则这些值也会进行内插。

这两个形状必须使用相同的reference box。

如果两个形状都是ellipse()或circle()类型，且它们的半径都未使用closest-side或最远端的关键字，则在形状函数中的每个值之间进行插值。

如果两种形状都是inset()类型，则在形状函数中的每个值之间进行插值。

如果两种形状都是polygon()类型，且两个多边形都具有相同的顶点数，并使用相同<fill-rule>，那么在形状函数中的每个值之间插值。

在所有其他情况下，不指定插值。

形式语法

none | <shape-box> || <basic-shape> | <image>where 
<shape-box> = <box> | margin-box
<basic-shape> = <inset()> | <circle()> | <ellipse()> | <polygon()>
<image> = <url> | <image()> | <image-set()> | <element()> | <cross-fade()> | <gradient>
where 
<box> = border-box | padding-box | content-box
<inset()> = inset( <length-percentage>{1,4} [ round <border-radius> ]? )
<circle()> = circle( [ <shape-radius> ]? [ at <position> ]? )
<ellipse()> = ellipse( [ <shape-radius>{2} ]? [ at <position> ]? )
<polygon()> = polygon( <fill-rule>? , [ <length-percentage> <length-percentage> ]# )
<image()> = image( [ [ <image> | <string> ]? , <color>? ]! )
<image-set()> = image-set( <image-set-option># )
<element()> = element( <id-selector> )
<cross-fade()> = cross-fade( <cf-mixing-image> , <cf-final-image>? )
<gradient> = <linear-gradient()> | <repeating-linear-gradient()> | <radial-gradient()> | <repeating-radial-gradient()>
where 
<length-percentage> = <length> | <percentage>
<shape-radius> = <length-percentage> | closest-side | farthest-side
<position> = [[ left | center | right | top | bottom | <length-percentage> ] | [ left | center | right | <length-percentage> ] [ top | center | bottom | <length-percentage> ] | [ center | [ left | right ] <length-percentage>? ] && [ center | [ top | bottom ] <length-percentage>? ]]
<fill-rule> = nonzero | evenodd
<color> = <rgb()> | <rgba()> | <hsl()> | <hsla()> | <hex-color> | <named-color> | currentcolor | <deprecated-system-color>
<image-set-option> = [ <image> | <string> ] <resolution>
<cf-mixing-image> = <percentage>? && <image>
<cf-final-image> = <image> | <color>
<linear-gradient()> = linear-gradient( [ <angle> | to <side-or-corner> ]? , <color-stop-list> )
<repeating-linear-gradient()> = repeating-linear-gradient( [ <angle> | to <side-or-corner> ]? , <color-stop-list> )
<radial-gradient()> = radial-gradient( [ <ending-shape> || <size> ]? [ at <position> ]? , <color-stop-list> )
<repeating-radial-gradient()> = repeating-radial-gradient( [ <ending-shape> || <size> ]? [ at <position> ]? , <color-stop-list> )
where 
<rgb()> = rgb( [ [ <percentage>{3} | <number>{3} ] [ / <alpha-value> ]? ] | [ [ <percentage>#{3} | <number>#{3} ] , <alpha-value>? ] )
<rgba()> = rgba( [ [ <percentage>{3} | <number>{3} ] [ / <alpha-value> ]? ] | [ [ <percentage>#{3} | <number>#{3} ] , <alpha-value>? ] )
<hsl()> = hsl( [ <hue> <percentage> <percentage> [ / <alpha-value> ]? ] | [ <hue>, <percentage>, <percentage>, <alpha-value>? ] )
<hsla()> = hsla( [ <hue> <percentage> <percentage> [ / <alpha-value> ]? ] | [ <hue>, <percentage>, <percentage>, <alpha-value>? ] )
<side-or-corner> = [ left | right ] || [ top | bottom ]
<color-stop-list> = <color-stop>#{2,}
<ending-shape> = circle | ellipse
<size> = closest-side | farthest-side | closest-corner | farthest-corner | <length> | <length-percentage>{2}

where 
<alpha-value> = <number> | <percentage>
<hue> = <number> | <angle>
<color-stop> = <color> <length-percentage>?

实例

CSS内容

.main {
  width: 500px;
}

.left,
.right {
  width: 40%;
  height: 12ex;
  background-color: lightgray;
}

.left {
  -webkit-shape-outside: polygon(0 0, 100% 100%, 0 100%
  shape-outside: polygon(0 0, 100% 100%, 0 100%
  float: left;
  -webkit-clip-path: polygon(0 0, 100% 100%, 0 100%
  clip-path: polygon(0 0, 100% 100%, 0 100%
}

.right {
  -webkit-shape-outside: polygon(100% 0, 100% 100%, 0 100%
  shape-outside: polygon(100% 0, 100% 100%, 0 100%
  float: right;
  -webkit-clip-path: polygon(100% 0, 100% 100%, 0 100%
  clip-path: polygon(100% 0, 100% 100%, 0 100%
}

p {
  text-align: center;
}

HTML内容

<div class="main">
  <div class="left"></div>
  <div class="right"></div>
  <p>
    Sometimes a web page's text content appears to be
    funneling your attention towards a spot on the page
    to drive you to follow a particular link.  Sometimes
    you don't notice.
  </p>
</div>

输出

规范

Specification	Status	Comment
CSS Shapes Module Level 1The definition of 'shape-outside' in that specification.	Candidate Recommendation	Initial definition

浏览器兼容性

Feature	Chrome	Firefox (Gecko)	Internet Explorer	Opera	Safari (WebKit)
Basic support	37	No support1	No support	24	8.0 -webkit
<gradient>	?	No support	No support	?	?
inset()	?	No support2	No support	?	?
polygon()	?	No support3	No support	?	?

Feature	Android	Firefox Mobile (Gecko)	IE Phone	Opera Mobile	Safari Mobile
Basic support	No support	No support1	No support	No support	8.0 -webkit
<gradient>	No support	No support	No support	No support	?
inset()	No support	No support2	No support	No support	?
polygon()	No support	No support3	No support	?	?