[css-transforms-1] Inline specification issues

Author: dirkschulze

css-transforms-1/Overview.bs

@@ -1,6 +1,6 @@
 <pre class='metadata'>
 Title: CSS Transforms Module Level 1
-Status: WD
+Status: ED
 Work Status: Refining
 ED: https://drafts.csswg.org/css-transforms/
 TR: https://www.w3.org/TR/css-transforms-1/
@@ -120,9 +120,14 @@ When used in this specification, terms have the meanings assigned in this sectio
 
 : <dfn>transformable element</dfn>
 :: A transformable element is an element in one of these categories:
-	* an element whose layout is governed by the CSS box model which is either a <a href="https://www.w3.org/TR/CSS2/visuren.html#block-level">block-level</a> or <a href="https://www.w3.org/TR/CSS2/visuren.html#x13">atomic inline-level element</a>, or whose 'display' property computes to ''table-row'', ''table-row-group'', ''table-header-group'', ''table-footer-group'', ''table-cell'', or ''table-caption'' [[!CSS2]]
-	* an element in the SVG namespace and not governed by the CSS box model which has the attributes <a element-attr for>transform</a>, <{pattern/patternTransform}> or <{linearGradient/gradientTransform}> [[!SVG11]].
+	  * an element whose layout is governed by the CSS box model which is either a <a href="https://www.w3.org/TR/CSS2/visuren.html#block-level">block-level</a> or <a href="https://www.w3.org/TR/CSS2/visuren.html#x13">atomic inline-level element</a>, or whose 'display' property computes to ''table-row'', ''table-row-group'', ''table-header-group'', ''table-footer-group'', ''table-cell'', or ''table-caption'' [[!CSS2]]
+	  * an element in the SVG namespace and not governed by the CSS box model which has the attributes <a element-attr for>transform</a>, <{pattern/patternTransform}> or <{linearGradient/gradientTransform}> [[!SVG11]].
 
+    Issue(2033): Too restrictive and replace black list with white list?
+
+    Issue(908): How do transforms apply to inlines?
+
+    Issue(358): Adapte SVG2's content model for transformable elements.
 : <dfn>transformed element</dfn>
 :: An element with a computed value other than ''transform/none'' for the 'transform' property.
 
@@ -167,6 +172,8 @@ Transforms apply to [=transformable elements=].
 
 Note: Transformations do affect the visual rendering, but have no affect on the CSS layout other than affecting overflow. Transforms are also taken into account when computing client rectangles exposed via the Element Interface Extensions, namely <a href="https://www.w3.org/TR/cssom-view/#dom-element-getclientrects">getClientRects()</a> and <a href="https://www.w3.org/TR/cssom-view/#dom-element-getboundingclientrect">getBoundingClientRect()</a>, which are specified in [[CSSOM-VIEW]].
 
+Issue(901): Overflow bounds that are computed at the end of layout can increase (but not decrease) by  paint-level effects such as transforms.
+
 <div class="example">
   <pre>
 div {
@@ -360,8 +367,11 @@ All transformations defined by the 'transform' and 'transform-origin' property a
 		* The reference box is positioned at the origin of the coordinate system established by the {{viewBox}} attribute.
 		* The dimension of the reference box is set to the <em>width</em> and <em>height</em> values of the {{viewBox}} attribute.
 
+    Issue(999): Follow used value definition of Fill and Stroke specs/SVG2?
 </dl>
 
+Issue(892): Clarify what the reference box of paint servers, <a element>clipPath</a> and <a element>mask</a> is.
+
 A reference box adds an additional offset to the origin specified by the 'transform-origin' property.
 
 For SVG elements without an associated CSS layout box, the [=used value=] for <a value for=transform-box>border-box</a> is <a value for=transform-box>view-box</a>.
@@ -374,6 +384,8 @@ The SVG <a element-attr for>transform</a> Attribute {#svg-transform}
 
 The SVG 1.1 specification did not specify the attributes <a element-attr for>transform</a>, <{linearGradient/gradientTransform}> or <{pattern/patternTransform}> as <a>presentation attributes</a> [[!SVG11]]. In order to improve the integration of SVG and HTML, this specification makes these SVG attributes presentation attributes and makes the 'transform' property one that applies to [=transformable elements=] in the SVG namespace.
 
+Issue(919) Can patternTransform or gradientTransform or transform attributes apply to one element? If yes, which is the most significant? 
+
 This specification will also introduce the new presentation attribute 'transform-origin'. Values on this presentation attribute get parsed following the syntax rules on <a href="#svg-data-types">SVG Data Types</a> [[!SVG11]].
 
 SVG <a element-attr for>transform</a> attribute specificity {#transform-attribute-specificity}
@@ -470,6 +482,8 @@ In particular the <{pattern/patternUnits}>, <{linearGradient/gradientUnits}> and
 
 For all other [=transformable elements=] the <a element-attr for>transform</a> presentation attribute represents values in the current user coordinate system of the parent. All percentage values of the <a element-attr for>transform</a> presentation attribute are relative to the element's [=reference box=].
 
+Issue(893): User coordinate space statement breaks SVG.
+
 <div class="example">
 
 The 'transform-origin' property on the pattern in the following example specifies a ''50%'' translation of the origin in the horizontal and vertical dimension. The 'transform' property specifies a translation as well, but in absolute lengths.
@@ -518,6 +532,8 @@ With this specification, the <{animate}> element and the <{set}> element can ani
 
 The animation effect is post-multiplied to the underlying value for additive <{animate}> animations (see below) instead of added to the underlying value, due to the specific behavior of <<transform-list>> animations.
 
+Issue(909) Clarify post-/pre-multiply column-/row-major order.
+
 <var ignore=''>From-to</var>, <var ignore=''>from-by</var> and <var ignore=''>by</var> animations are defined in SMIL to be equivalent to a corresponding <var>values</var> animation. However, <var ignore=''>to</var> animations are a mixture of additive and non-additive behavior [[SMIL3]].
 
 <var ignore=''>To</var> animations on <{animate}> provide specific functionality to get a smooth change from the underlying value to the <var ignore=''>to</var> attribute value, which conflicts mathematically with the requirement for additive transform animations to be post-multiplied. As a consequence, the behavior of <var ignore=''>to</var> animations for <{animate}> is undefined. Authors are suggested to use <var ignore=''>from-to</var>, <var ignore=''>from-by</var>, <var ignore=''>by</var> or <var ignore=''>values</var> animations to achieve any desired transform animation.
@@ -564,6 +580,8 @@ Some animations require a neutral element for addition. For transform functions
 
 Note: Animations to or from the neutral element of additions <<matrix()>> fall back to discrete animations (See [[#matrix-interpolation]]).
 
+Issue(932): Replace text and simply refer to `null` value?
+
 <div class="example">
 
 A <var>by</var> animation with a by value v<sub>b</sub> is equivalent to the same animation with a values list with 2 values, the neutral element for addition for the domain of the target attribute (denoted 0) and v<sub>b</sub>, and ''additive="sum"''. [[SMIL3]]
@@ -734,6 +752,8 @@ When animating or transitioning transforms, the transform function lists must be
 
 In some cases, an animation might cause a transformation matrix to be singular or non-invertible. For example, an animation in which scale moves from 1 to -1. At the time when the matrix is in such a state, the transformed element is not rendered.
 
+Issue(927): Use proposed tranform interpolation from GitHub issue.
+
 Transform function primitives and derivatives {#transform-primitives}
 =====================================================================
 
@@ -899,6 +919,10 @@ Decomposition also makes use of the following function:
 
 The pseudo code below is based upon the "unmatrix" method in "Graphics Gems II, edited by Jim Arvo".
 
+Issue(924): Clarify column/row order for matrix in pseudo code.
+
+Issue(483): Incorrect indices for matrix?
+
 <pre>
 Input:  matrix      ; a 4x4 matrix
 Output: translation ; a 2 component vector