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Add differences for composition events and canvas element #116

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Merged
merged 3 commits into from
Aug 20, 2025
Merged

Add differences for composition events and canvas element #116

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81d90bb
add differences for canvas element
ashishkum-ms Aug 14, 2025
130ef91
add diffs for composition events
ashishkum-ms Aug 18, 2025
f2406e1
address feedback
ashishkum-ms Aug 20, 2025
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25 changes: 24 additions & 1 deletion index.html
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Expand Up @@ -234,7 +234,8 @@ <h4 id="edit-context-differences">Differences for an EditContext editing host</h
Each child node of the <a>EditContext editing host</a> becomes <a href="https://w3c.github.io/editing/docs/execCommand/#editable">editable</a>,
unless that node has a [^html-global/contenteditable^] attribute set to "<code>false</code>".
</li>
<li>The user agent handles focus and caret navigation for any editable element in the <a>EditContext editing host</a>.</li>
<li>The user agent handles focus and caret navigation for any editable element in the <a>EditContext editing host</a> (except when the
[=associated element=] is a [=canvas=]; see below in this section).</li>
<li>
The <a>EditContext editing host</a> receives key events and the <a href="https://www.w3.org/TR/uievents/#event-type-beforeinput">beforeinput</a>
event as specified in [[uievents]].
Expand All @@ -257,6 +258,28 @@ <h4 id="edit-context-differences">Differences for an EditContext editing host</h
against the <a>EditContext editing host</a> as a direct result of user action
event as specified in [[uievents]].
</li>
<li>
When the {{Document}} being edited has an [=active EditContext=], the user agent must not fire
<a href="https://www.w3.org/TR/uievents/#events-compositionevents">composition events</a> against the
<a>EditContext editing host</a> as a direct result of user action. Instead they will be fired against the {{EditContext}} as part
of [=update the EditContext|updating the EditContext=] or [=deactivate an EditContext|deactivating the EditContext=].
</li>
<li>
<p>
When the [=active EditContext=]'s [=associated element=] is a [=canvas=], there are further differences:
</p>
<ul>
<li>
The user agent is unable to handle caret navigation and selection since it doesn't have information
about how text is laid out in the [=canvas=], so the author has to implement caret navigation and selection.
</li>
<li>
The user agent is unable to present inline spelling and grammar suggestions since it doesn't have information
about how the text is laid out in the [=canvas=], so if the author wants to support spelling and grammar suggestions,
they have to implement that themselves.
</li>
</ul>
</li>
</ul>
</div>

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