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some bikeshed link disambiguation and validity fixes; add TR link #1587

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litherum merged 1 commit into from
Jul 9, 2017
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some bikeshed link disambiguation and validity fixes; add TR link #1587

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45 changes: 32 additions & 13 deletions css-fonts-4/Overview.bs
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,7 @@ Status: ED
Work Status: Exploring
Group: CSSWG
ED: https://drafts.csswg.org/css-fonts-4/
TR: https://www.w3.org/TR/css-fonts-4/
Editor: John Daggett, Invited Expert, https://twitter.com/nattokirai
Editor: Myles C. Maxfield, Apple Inc., mmaxfield@apple.com
Abstract: This specification defines modifications to the existing <a href="https://drafts.csswg.org/css-fonts-3/">CSS Fonts 3</a> specification along with additional experimental features.
Expand All @@ -14,6 +15,19 @@ Ignored Terms: font-palette, <named-palette-color>

<pre class="link-defaults">
spec:css-color-4; type:property; text:color
spec:css22; type:value; for:/; text:block
spec:css-fonts-4; type:descriptor; for:/@font-face; text:font-face-name
spec:css-fonts-4; type:property; for:/; text:font-family
spec:css-fonts-4; type:descriptor; for:/@font-face; text:font-family
spec:css-fonts-4; type:property; for:/; text:font-weight
spec:css-fonts-4; type:descriptor; for:/@font-face; text:font-weight
spec:css-fonts-4; type:property; for:/; text:font-stretch
spec:css-fonts-4; type:descriptor; for:/@font-face; text:font-stretch
spec:css-fonts-4; type:property; for:/; text:font-style
spec:css-fonts-4; type:descriptor; for:/@font-face; text:font-style
spec:css-fonts-3; type:property; for:/; text:font-kerning
spec:css-fonts-3; type:property; for:/; text:font-language-override
spec:css-fonts-3; type:descriptor; for:/@font-face; text:unicode-range
</pre>

Advisement: This document contains ideas and
Expand Down Expand Up @@ -1061,7 +1075,7 @@ name:
</pre>
</div>

<h3 id="font-size-adjust-prop">
<h3 id="font-synthesis-prop">
Controlling synthetic faces: the 'font-synthesis' property</h3>

<pre class="propdef">
Expand Down Expand Up @@ -2008,20 +2022,20 @@ if all font style properties were set to their initial value.

Consider a font family with three fonts, named A, B, and C, each with associated supported ranges for the 'font-stretch' descriptor. If an element is styled with "font-stretch: 125", the search algorithm can be visualized as follows:

<img src="stretchdistance.svg">
<img src="stretchdistance.svg" alt="algorithm">

The font stretch ranges supported by fonts A, B, and C are shown in the graph above. As you can see, because font B contains the minimum stretch value across the entire family, font B would be selected by this algorithm. However, if font B were somehow eliminated from the family, font C would then contain the lowest distance in the family, so it would be selected.
</div>

<div class="example">
Similar to the <a href="#ascendingstretch">previous example</a>, here is the conceptual distance graph for an element styled with "font-stretch: 75":

<img src="stretchdistance2.svg">
<img src="stretchdistance2.svg" alt="distance graph">

As you can see, because font B contains the minimum stretch value across the entire family, font B would be selected by this algorithm. However, if font B were somehow eliminated from the family, font A would then contain the lowest distance in the family, so it would be selected.
</div>

2. <span id="font-style-matching">'font-style' is tried next.</span>
2. <a href="#font-style-matching">'font-style' is tried next.</span>
If a font does not have any concept of varying strengths of italics or oblique angles, its style
is mapped according to the description in the 'font-style' property definition.

Expand All @@ -2041,7 +2055,7 @@ if all font style properties were set to their initial value.
<div class="example">
Similar to the <a href="#ascendingstretch">previous example</a>, here is the conceptual distance graph for an element styled with "font-style: italic":

<img src="styledistance.svg">
<img src="styledistance.svg" alt="distance graph">

As you can see, because font D contains the minimum italic value across the entire family, font D would be selected by this algorithm. However, if font D were somehow eliminated from the family, font E would then contain the lowest distance in the family, so it would be selected. If E were eliminated, C would be selected. If C were eliminated, font B would not be chosen immediately; instead, oblique values would be consulted and an oblique value might be chosen. However, if no oblique value is chosen, font B would then be selected, followed by font A.
</div>
Expand All @@ -2061,7 +2075,7 @@ if all font style properties were set to their initial value.
<div class="example">
Similar to the <a href="#ascendingstretch">previous example</a>, here is the conceptual distance graph for an element styled with "font-style: oblique 40deg":

<img src="styledistance2.svg">
<img src="styledistance2.svg" alt="distance graph">

As you can see, because font D contains the minimum oblique value across the entire family, font D would be selected by this algorithm. However, if font D were somehow eliminated from the family, font E would then contain the lowest distance in the family, so it would be selected. If E were eliminated, C would be selected. If C were eliminated, font B would not be chosen immediately; instead, italic values would be consulted and an italic value might be chosen. However, if no italic value is chosen, font B would then be selected, followed by font A.
</div>
Expand All @@ -2085,7 +2099,7 @@ if all font style properties were set to their initial value.
<div class="example">
Similar to the <a href="#ascendingstretch">previous example</a>, here is the conceptual distance graph for an element styled with "font-style: oblique 13deg":

<img src="styledistance3.svg">
<img src="styledistance3.svg" alt="distance graph">

As you can see, because font D contains the minimum oblique value across the entire family, font D would be selected by this algorithm. However, if font D were somehow eliminated from the family, font C would then contain the lowest distance in the family, so it would be selected. If C were eliminated, E would be selected. If E were eliminated, font B would not be chosen immediately; instead, italic values would be consulted and an italic value might be chosen. However, if no italic value is chosen, font B would then be selected, followed by font A.
</div>
Expand All @@ -2103,7 +2117,7 @@ if all font style properties were set to their initial value.
<div class="example">
Similar to the <a href="#ascendingstretch">previous example</a>, here is the conceptual distance graph for an element styled with "font-style: normal":

<img src="styledistance4.svg">
<img src="styledistance4.svg" alt="distance graph">

As you can see, because font C contains the minimum oblique value across the entire family, font C would be selected by this algorithm. However, if font C were somehow eliminated from the family, font B would not be chosen immediately; instead, italic values would be consulted and an italic value might be chosen. However, if no italic value is chosen, font B would then be selected, followed by font A.
</div>
Expand Down Expand Up @@ -2137,15 +2151,15 @@ if all font style properties were set to their initial value.
<div class="example">
Similar to the <a href="#ascendingstretch">previous example</a>, here is the conceptual distance graph for an element styled with "font-weight: 400":

<img src="styleweight.svg">
<img src="styleweight.svg" alt="distance graph">

As you can see, because font B contains the minimum oblique value across the entire family, font B would be selected by this algorithm. However, if font B were somehow eliminated from the family, font D would then contain the lowest distance in the family, so it would be selected. If D were eliminated, A would be selected, followed by fonts C and then E.
</div>

<div class="example">
Similar to the <a href="#ascendingstretch">previous example</a>, here is the conceptual distance graph for an element styled with "font-weight: 500":

<img src="weightmatching.svg">
<img src="weightmatching.svg" alt="distance graph">

As you can see, because font D contains the minimum oblique value across the entire family, font D would be selected by this algorithm. However, if font D were somehow eliminated from the family, font B would then contain the lowest distance in the family, so it would be selected. If B were eliminated, C would be selected, followed by fonts A and then E.
</div>
Expand All @@ -2157,7 +2171,7 @@ if all font style properties were set to their initial value.
<div class="example">
Similar to the <a href="#ascendingstretch">previous example</a>, here is the conceptual distance graph for an element styled with "font-weight: 300":

<img src="weightmatching2.svg">
<img src="weightmatching2.svg" alt="distance graph">

As you can see, because font B contains the minimum oblique value across the entire family, font B would be selected by this algorithm. However, if font B were somehow eliminated from the family, font A would then contain the lowest distance in the family, so it would be selected. If A were eliminated, C would be selected.
</div>
Expand Down Expand Up @@ -2243,6 +2257,11 @@ Cluster matching</h3>

Issue: Import from level 3

<h2 id="font-rend-props">
Font Feature Properties</h2>

Issue: Import from level 3

<h2 id="font-feature-variation-resolution">
Font Feature and Variation Resolution</h3>

Expand Down Expand Up @@ -2767,7 +2786,7 @@ or implement the ability to disable color fonts,
''@font-palette-values'' rules must simply be ignored;
the behavior of individual descriptors as defined in this specification should not be altered.

<h3 id="font-family-desc">
<h3 id="font-family-2-desc">
Font family: the 'font-family' descriptor</h3>

<pre class='descdef mq'>
Expand Down Expand Up @@ -2931,7 +2950,7 @@ the variation selector is ignored.
User Agents can choose to draw a <a>Presentation Participating Code Point</a>
in either emoji style or text style.
User Agents may wish to follow
the <a href="http://www.unicode.org/reports/tr51/proposed.html#Presentation_Style">guidance</a> of the Unicode Consortium
the <a href="http://www.unicode.org/reports/tr51/index.html#Presentation_Style">guidance</a> of the Unicode Consortium
when performing this decision.
User agents also may wish to follow platform conventions when performing this decision.

Expand Down