[cssom-view] Introduce the terms 'SVG layout box' and 'layout box'

Author: Simon Pieters

cssom-view/Overview.html

@@ -243,7 +243,7 @@ <h2 id="terminology"><span class="secno">3 </span>Terminology</h2>
 <p><dfn id="viewport">Viewport</dfn> and
 <dfn id="initial-containing-block">initial containing block</dfn> are
 defined by CSS 2.1 unless there is an ancestor <code title="">foreignObject</code>
-element in the <code title="">http://www.w3.org/2000/svg</code> namespace in which
+element in the <code title="">http://www.w3.org/2000/svg</code> namespace that has an associated <a href="#svg-layout-box">SVG layout box</a> in which
 case that element acts as viewport and initial containing block.
 <!--<span data-anolis-ref>CSS</span>-->
 
@@ -419,6 +419,12 @@ <h2 id="terminology"><span class="secno">3 </span>Terminology</h2>
 'table-column-group' must be considered to have an associated <a href="#css-layout-box">CSS
 layout box</a> (the column or column group, respectively).</p>
 
+<p>The term <dfn id="svg-layout-box">SVG layout box</dfn> refers to the same term in SVG.
+
+<p class="issue">The terms <a href="#css-layout-box">CSS layout box</a> and <a href="#svg-layout-box">SVG layout box</a> are not currently defined by CSS or SVG.
+
+<p>The term <dfn id="layout-box">layout box</dfn> refers to either a <a href="#css-layout-box">CSS layout box</a> or an <a href="#svg-layout-box">SVG layout box</a>.
+
 <h3 id="css-pixels"><span class="secno">3.1 </span>CSS pixels</h3>
 
 <p>All coordinates and dimensions for the APIs defined in this
@@ -825,11 +831,9 @@ <h2 id="extensions-to-the-element-interface"><span class="secno">7 </span>Extens
 <p>The <dfn id="dom-element-getclientrects" title="dom-Element-getClientRects"><code>getClientRects()</code></dfn> method, when invoked, must return the result of the following algorithm:</p>
 <ol>
  <li><p>If the element on which it was invoked does not have an associated
- <a href="#css-layout-box">CSS layout box</a> and is not in the <code title="">http://www.w3.org/2000/svg</code>
- namespace return an empty <code><a href="#clientrectlist">ClientRectList</a></code> object and stop
+ <a href="#layout-box">layout box</a> return an empty <code><a href="#clientrectlist">ClientRectList</a></code> object and stop
  this algorithm.</li>
- <li><p>If the element does not have an associated <a href="#css-layout-box">CSS layout box</a> and is
- in the <code title="">http://www.w3.org/2000/svg</code> namespace return a
+ <li><p>If the element has an associated <a href="#svg-layout-box">SVG layout box</a> return a
  <code><a href="#clientrectlist">ClientRectList</a></code> object containing a single
  <code><a href="#clientrect">ClientRect</a></code> object that describes the bounding box of the
  element as defined by the SVG specification.

cssom-view/Overview.src.html

@@ -205,7 +205,7 @@ <h2>Terminology</h2>
 <p><dfn>Viewport</dfn> and
 <dfn>initial containing block</dfn> are
 defined by CSS 2.1 unless there is an ancestor <code title>foreignObject</code>
-element in the <code title>http://www.w3.org/2000/svg</code> namespace in which
+element in the <code title>http://www.w3.org/2000/svg</code> namespace that has an associated <span>SVG layout box</span> in which
 case that element acts as viewport and initial containing block.
 <!--<span data-anolis-ref>CSS</span>-->
 
@@ -381,6 +381,12 @@ <h2>Terminology</h2>
 'table-column-group' must be considered to have an associated <span>CSS
 layout box</span> (the column or column group, respectively).</p>
 
+<p>The term <dfn>SVG layout box</dfn> refers to the same term in SVG.
+
+<p class=issue>The terms <span>CSS layout box</span> and <span>SVG layout box</span> are not currently defined by CSS or SVG.
+
+<p>The term <dfn>layout box</dfn> refers to either a <span>CSS layout box</span> or an <span>SVG layout box</span>.
+
 <h3>CSS pixels</h3>
 
 <p>All coordinates and dimensions for the APIs defined in this
@@ -787,11 +793,9 @@ <h2>Extensions to the <code title>Element</code> Interface</h2>
 <p>The <dfn title=dom-Element-getClientRects><code>getClientRects()</code></dfn> method, when invoked, must return the result of the following algorithm:</p>
 <ol>
  <li><p>If the element on which it was invoked does not have an associated
- <span>CSS layout box</span> and is not in the <code title>http://www.w3.org/2000/svg</code>
- namespace return an empty <code>ClientRectList</code> object and stop
+ <span>layout box</span> return an empty <code>ClientRectList</code> object and stop
  this algorithm.</p></li>
- <li><p>If the element does not have an associated <span>CSS layout box</span> and is
- in the <code title>http://www.w3.org/2000/svg</code> namespace return a
+ <li><p>If the element has an associated <span>SVG layout box</span> return a
  <code>ClientRectList</code> object containing a single
  <code>ClientRect</code> object that describes the bounding box of the
  element as defined by the SVG specification.