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Define base appearance for <select> #10629

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Define base appearance for <select> #10629

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8e17138
Define base appearance for <select>
josepharhar Jul 18, 2024
f8cd659
rewrote a lot
josepharhar Nov 11, 2024
9c41826
Merge branch 'main' into selectrendering
josepharhar Nov 11, 2024
85b785f
prevent select button from being default submit button
josepharhar Nov 13, 2024
5e5dcb3
Merge branch 'main' into selectrendering
josepharhar Dec 5, 2024
8dc3b0e
reverse tree order
josepharhar Dec 5, 2024
46f457e
code around elements
josepharhar Dec 5, 2024
d9bc0b4
nits
josepharhar Dec 5, 2024
72c006b
add open the picker paragraph
josepharhar Dec 5, 2024
2400840
add arrow key events
josepharhar Dec 5, 2024
dcf650b
replace activation behavior for options
josepharhar Dec 6, 2024
9758b7b
Update focus another option
josepharhar Dec 13, 2024
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134 changes: 128 additions & 6 deletions source
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Original file line number Diff line number Diff line change
Expand Up @@ -3236,6 +3236,7 @@ a.setAttribute('href', 'https://example.com/'); // change the content attribute
<li>The <dfn data-x-href="https://dom.spec.whatwg.org/#concept-tree-child" data-x="concept-tree-child">child</dfn> concept</li>
<li>The <dfn data-x-href="https://dom.spec.whatwg.org/#concept-tree-root">root</dfn> and <dfn data-x-href="https://dom.spec.whatwg.org/#concept-shadow-including-root">shadow-including root</dfn> concepts</li>
<li>The <dfn data-x-href="https://dom.spec.whatwg.org/#concept-tree-inclusive-ancestor">inclusive ancestor</dfn>,
<dfn data-x-href="https://dom.spec.whatwg.org/#concept-tree-ancestor">ancestor</dfn>,
<dfn data-x-href="https://dom.spec.whatwg.org/#concept-tree-descendant">descendant</dfn>,
<dfn data-x="concept-shadow-including-ancestor" data-x-href="https://dom.spec.whatwg.org/#concept-shadow-including-ancestor">shadow-including ancestor</dfn>,
<dfn data-x-href="https://dom.spec.whatwg.org/#concept-shadow-including-descendant">shadow-including descendant</dfn>,
Expand Down Expand Up @@ -3994,6 +3995,7 @@ a.setAttribute('href', 'https://example.com/'); // change the content attribute
<li>The concept <dfn data-x-href="https://drafts.csswg.org/css-ui/#widget">widget</dfn></li>
<li>The concept <dfn data-x-href="https://drafts.csswg.org/css-ui/#native-appearance">native appearance</dfn></li>
<li>The concept <dfn data-x-href="https://drafts.csswg.org/css-ui/#primitive-appearance">primitive appearance</dfn></li>
<li>The concept <dfn data-x-href="https://drafts.csswg.org/css-ui/#base-appearance">base appearance</dfn></li>
<li>The concept <dfn data-x-href="https://drafts.csswg.org/css-ui/#element-with-default-preferred-size">element with default preferred size</dfn></li>
<li>The <dfn data-x-href="https://drafts.csswg.org/css-ui/#non-devolvable">non-devolvable widget</dfn> and
<dfn data-x-href="https://drafts.csswg.org/css-ui/#devolvable">devolvable widget</dfn> classification, and the related
Expand Down Expand Up @@ -53748,10 +53750,31 @@ interface <dfn interface>HTMLSelectElement</dfn> : <span>HTMLElement</span> {
through a click, or through unfocusing the element after changing its value, or through a <span
data-x="option-command">menu command</span>, or through any other mechanism), and before the
relevant user interaction event <!-- interaction event spec point --> is queued (e.g. before the
<code data-x="event-click">click</code> event), the user agent must set the <span
data-x="concept-option-selectedness">selectedness</span> of the picked <code>option</code> element
to true, set its <span data-x="concept-option-dirtiness">dirtiness</span> to true, and then
<span>send <code>select</code> update notifications</span>.</p>
<code data-x="event-click">click</code> event), the user agent must run the <span>pick an
option</span> algorithm given the <code>select</code> and the picked <code>option</code>. If the
<code>select</code> is being rendered with <span>base appearance</span>, then <span
data-x="concept-select-pick">picking</span> an <code>option</code> will fire a corresponding <code
data-x="event-keydown">keydown</code> or <code data-x="event-mouseup">mouseup</code> event.
Calling <code data-x="dom-Event-preventDefault">preventDefault()</code> on either of these events
will prevent the <span>pick an option</span> algorithm from running.</p>

<p>To <dfn>pick an option</dfn> given a <code>select</code> element <var>select</var> and an
<code>option</code> element <var>option</var>:</p>

<ol>
<li><p>Set <var>option</var>'s <span data-x="concept-option-selectedness">selectedness</span> to
true.</p></li>

<li><p>Set <var>option</var>'s <span data-x="concept-option-dirtiness">dirtiness</span> to
true.</p></li>

<li><p><span>Send <code>select</code> update notifications</span> given
<var>select</var>.</p></li>

<li><p>If <var>select</var> is being rendered as a <span>drop-down box</span> with <span>base
appearance</span>, then run the <span>hide popover algorithm</span> given <var>select</var>'s
<span>select popover</span>.</p></li>
</ol>

<p>If the <code data-x="attr-select-multiple">multiple</code> attribute is absent, whenever an
<code>option</code> element in the <code>select</code> element's <span
Expand Down Expand Up @@ -53831,6 +53854,26 @@ interface <dfn interface>HTMLSelectElement</dfn> : <span>HTMLElement</span> {
options</span> <dfn data-x="ask for a reset">asks for a reset</dfn>, then run that
<code>select</code> element's <span>selectedness setting algorithm</span>.</p>

<p>If the <code>select</code> is being rendered as a <span>drop-down box</span> with <span>base
appearance</span>, then the user agent should allow the user to <dfn
data-x="select-open-picker">open the picker</dfn>. Opening the picker will either fire a
corresponding <code data-x="event-mousedown">mousedown</code> or <code
data-x="event-keydown">keydown</code> event on the <code>select</code> element. Calling
<code data-x="dom-Event-preventDefault">preventDefault()</code> on either of these events will
prevent the picker from opening. Otherwise, the picker is opened.</p>

<p>If the <code>select</code> is being rendered as a <span>drop-down box</span> with <span>base
appearance</span>, then the user agent should allow the user to <dfn>focus another option</dfn>.
Performing this action will fire a corresponding <code data-x="event-keydown">keydown</code> event
on the currently focused <code>option</code> element, then run the <span>focusing steps</span> on
another <code>option</code> within the <code>select</code>. Calling <code
data-x="dom-Event-preventDefault">preventDefault()</code> on the <code
data-x="event-keydown">keydown</code> event will prevent the new <code>option</code> from being
focused.</p>

<p class="note">Implementations commonly allow the user to choose the next or previous option via
the arrow-up and arrow-down keys, or pick the first or last option via the Home or End keys.</p>

<p>If the <code data-x="attr-select-multiple">multiple</code> attribute is present, and the
element is not <span data-x="concept-fe-disabled">disabled</span>, then the user agent should
allow the user to <dfn data-x="concept-select-toggle">toggle</dfn> the <span
Expand All @@ -53853,6 +53896,9 @@ interface <dfn interface>HTMLSelectElement</dfn> : <span>HTMLElement</span> {
<ol>
<li>Set the <code>select</code> element's <span>user validity</span> to true.</li>

<li><p>Run <span>clone selected <code>option</code> into <code>select</code> button</span> given
the <code>select</code> element.</p></li>

<li><p><span data-x="concept-event-fire">Fire an event</span> named <code
data-x="event-input">input</code> at the <code>select</code> element, with the <code
data-x="dom-Event-bubbles">bubbles</code> and <code data-x="dom-Event-composed">composed</code>
Expand Down Expand Up @@ -54554,6 +54600,41 @@ interface <dfn interface>HTMLOptionElement</dfn> : <span>HTMLElement</span> {

</div>

<p>To get the <dfn><code>option</code> ancestor <code>select</code></dfn> given an
<code>option</code> <var>option</var>:</p>

<ol>
<li>
<p>For each <var>ancestor</var> of <var>option</var>'s <span
data-x="ancestor">ancestors</span> in reverse <span>tree order</span>:</p>

<ol>
<li><p>If <var>ancestor</var> is a <code>select</code>, then return
<var>ancestor</var>.</p></li>
</ol>
</li>

<li><p>Return null.</p></li>
</ol>

<p>To <dfn>clone selected <code>option</code> into <code>select</code> button</dfn>, given a
<code>select</code> element <var>select</var>:</p>

<ol>
<li><p>Let <var>option</var> be the first element of <var>select</var>'s <span
data-x="concept-select-option-list">option list</span> whose <span
data-x="concept-option-selectedness">selectedness</span> is set to true, if such an element
exists; otherwise null.</p></li>

<li><p>Let <var>text</var> be the empty string.</p></li>

<li><p>If <var>option</var> is not null, then set <var>text</var> to <var>option</var>'s <span
data-x="dom-option-label">label</span>.</p></li>

<li><p>Set <var>select</var>'s <span>select fallback button text</span> to
<var>text</var>.</p></li>
</ol>

<dl class="domintro">
<dt><code data-x=""><var>option</var>.<span subdfn data-x="dom-option-selected">selected</span></code></dt>

Expand Down Expand Up @@ -59823,7 +59904,8 @@ fur

<p>A <code>form</code> element's <dfn>default button</dfn> is the first <span
data-x="concept-submit-button">submit button</span> in <span>tree order</span> whose <span>form
owner</span> is that <code>form</code> element.</p>
owner</span> is that <code>form</code> element and who is not slotted into a <code>select</code>
element's <span>select button slot</span>.</p>

<p>If the user agent supports letting the user submit a form implicitly (for example, on some
platforms hitting the "enter" key while a text control is <span>focused</span> implicitly submits
Expand Down Expand Up @@ -137215,12 +137297,52 @@ progress { appearance: auto; }</code></pre>
with the element's <code>optgroup</code> element <span data-x="concept-tree-child">children</span>
providing headers for groups of options where applicable.</p>

<p><code>select</code> elements which render as a <span>drop-down box</span> support a <span>base
appearance</span> in addition to <span>native appearance</span> and <span>primitive
appearance</span>.</p>

<p>When a <code>select</code> is being rendered as a <span>drop-down box</span> with a <span>base
appearance</span>, it is expected to render as if it has a <span>shadow tree</span> with the
following elements:</p>

<ol>
<li><p>A <dfn>select button slot</dfn>, which is a <code>slot</code> element. It is appended to
the <code>select</code>'s <span>shadow root</span> as the first child. It is expected to take the
first child element of the <code>select</code> if the first child element is a
<code>button</code>, otherwise the <span>select fallback button text</span>.</p></li>

<li><p>A <dfn>select fallback button text</dfn>, which is a <code>div</code> element. It is
appended to the <span>select button slot</span>.</p></li>

<li><p>A <dfn>select popover</dfn>, which is a <code>div</code> element. It is appended to the
<code>select</code>'s <span>shadow root</span> as the second child, after the <span>select button
slot</span>.</p></li>

<li><p>A <dfn>select popover slot</dfn>, which is a <code>slot</code> element. It is appended to
the <span>select popover</span>. It is expected to take all child nodes of the
<code>select</code> except for the first child <code>button</code>, which is taken by the
<code>select button slot</code>.</p></li>
</ol>

<p class="note">Since <span>base appearance</span> is determined by computing style, it isn't
possible to swap this DOM structure when switching appearance. Implementations can always include
the DOM structure for <span>base appearance</span> when the <code>select</code> is rendered as a
<span>drop-down box</span> and then choose to include or exclude it from the layout tree in order
to control whether it gets rendered or not.</p>

<p>The <span>select popover</span>'s <span>implicit anchor element</span> is its associated
<code>select</code> element.</p>

<p>An <code>optgroup</code> element is expected to be rendered by displaying the element's <code
data-x="attr-optgroup-label">label</code> attribute.</p>

<p>An <code>option</code> element is expected to be rendered by displaying the element's <span
data-x="concept-option-label">label</span>, indented under its <code>optgroup</code> element if it
has one.</p>
has one. If the <code>option</code> is in a <code>select</code> which is being rendered as a
<span>drop-down box</span> with <span>base appearance</span>, and the <code>option</code>'s <code
data-x="attr-option-label">label</code> attribute is not set, then the <code>option</code> is
expected to render all of its children rather than by displaying its <span
data-x="concept-option-label">label</span>.</p>

<p>Each sequence of one or more child <code>hr</code> element siblings may be rendered as a single
separator.</p>
Expand Down