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Wt 4.9.0 release notes
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Expand Up @@ -20,7 +20,19 @@ <h1>Wt Release notes</h1>
the way you build Wt, the way you configure Wt or the Wt API and
behaviour.

<h2>Release 4.9.0 (December 2022)</h2>
<h2>Release 4.9.0 (December 22, 2022)</h2>

<p>
Wt 4.9.0 features a lot of changes under the covers: we have painstakingly removed jQuery from Wt,
modernized the JavaScript, and added a linter, formatter, and a new minifier in the process.
</p>

<p>
A more directly noticeable change is the fact that we gave the documentation a new lick of paint using the
Doxygen Awesome theme. Also, now that we added some tooling to customize WBootstrap5Theme, the
<a href="https://webtoolkit.eu/widgets" target="_blank">widget gallery</a>'s
primary color was updated to be more in line with Wt's website.
</p>

<h3>Backwards incompatible changes</h3>

Expand Down Expand Up @@ -78,25 +90,21 @@ <h4>Changes to WBootstrap5Theme</h4>
<dl>
<dt>Collapsible panels</dt>
<dd>
Since
<a href="classWt_1_1WBootstrap5Theme.html">WBootstrap5Theme</a>
was introduced in Wt 4.6.0, when a
<a href="classWt_1_1WPanel.html">WPanel</a> was made
<a href="classWt_1_1WPanel.html#ace945a192f671220a5a2cda671dc37ca">collapsible</a>
it would be implemented
using an
<a href="https://getbootstrap.com/docs/5.2/components/accordion/" target="_blank">accordion</a>,
has used an
<a href="https://getbootstrap.com/docs/5.2/components/accordion/" target="_blank">accordion</a>
instead of a
<a href="https://getbootstrap.com/docs/5.2/components/card/" target="_blank">card</a>
for collapsible panels since its introduction in Wt 4.6.0.
Now, <a href="classWt_1_1WPanel.html">WPanel</a> always uses a
<a href="https://getbootstrap.com/docs/5.2/components/card/" target="_blank">card</a>.
This allows all panels to have a consistent appearance, regardless of whether they can be collapsed or not.
Additionally, the
<a href="classWt_1_1WPanel.html#aefd66ff6dd8e2a1108e70efec4eab1b5">WPanel::collapse()</a> and
<a href="classWt_1_1WPanel.html#a2ac9a05172675559b6f988083a4fd666">WPanel::expand()</a> would not work with
<code>WBootstrap5Theme</code>.
We have now changed the implementation to use
<a href="https://getbootstrap.com/docs/5.2/components/card/" target="_blank">card</a>
again, so that all panels look alike regardless of whether they're collapsible.
It's now possible again to query and change the collapsed state of panels.
This resolves issue
<a href="https://redmine.webtoolkit.eu/issues/10364" target="_blank">#10364</a>.
<a href="classWt_1_1WPanel.html#a2ac9a05172675559b6f988083a4fd666">WPanel::expand()</a> functions will now work
as expected with
<a href="classWt_1_1WBootstrap5Theme.html">WBootstrap5Theme</a>.
This change resolves <a href="https://redmine.webtoolkit.eu/issues/10364" target="_blank">issue #10364</a>.
</dd>
<dt>Bootstrap 5 theme customization</dt>
<dd>
Expand All @@ -110,20 +118,28 @@ <h4>Changes to WBootstrap5Theme</h4>
<a href="https://www.webtoolkit.eu/widgets" target="_blank">widget gallery</a>
makes use of this by changing the primary color from Bootstrap's blue to the purple
used in Wt's logo and homepage.
This resolves issue
<a href="https://redmine.webtoolkit.eu/issues/9350" target="_blank">#9350</a>.
This change resolves <a href="https://redmine.webtoolkit.eu/issues/9350" target="_blank">issue #9350</a>.
</dd>
</dl>

<h3>Other</h3>
<h3>New features</h3>

<ul>
<li>
<a href="https://redmine.webtoolkit.eu/issues/10395" target="_blank">Issue #10395</a>:
<a href="classWt_1_1WPanel.html#a9671893042605eb936c7301f6de09d3f">WPanel::setTitleBar(false)</a>
now automatically calls
<a href="classWt_1_1WPanel.html#ace945a192f671220a5a2cda671dc37ca">WPanel::setCollapsible(false)</a>.
Added <a href="classWt_1_1WProgressBar.html#abf8547894af5efc5e5789f9fa56bdc03">
WProgressBar::setValueStyleClass()</a>
(<a href="https://github.com/emweb/wt/pull/131" target="_blank">PR #131</a>
by maximiliank on GitHub).
</li>
<li>
Added <a href="namespaceWt_1_1Utils.html#a13d154e4ef34ee6f8c1a90e8aaeec0dc">Wt::Utils::htmlAttributeValue()</a>
to escape values if they are put into the value of an HTML tag.
</li>
</ul>

<h3>Other improvements</h3>

<ul>
<li>
<a href="https://redmine.webtoolkit.eu/issues/11067" target="_blank">Issue #11067</a>:
<a href="classWt_1_1WWidget.html#af01fbd9de70abd189c2f86171b6a1e02">animateShow()</a> and
Expand All @@ -138,13 +154,45 @@ <h3>Other</h3>
minifier from the old version of Google Closure compiler we were using to
<a href="https://terser.org/" target="_blank">terser</a>.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/10966" target="_blank">Issue #10966</a>:
Added a JavaScript formatter to format Wt's JavaScript code.
Its usage is detailed in the Wt source tree at
<a
href="https://github.com/emweb/wt/blob/master/doc/development/javascript.md"
target="_blank"><code>doc/development/javascript.md</code></a>.
</li>
<li>
We gave our reference documentation a new lick of paint: we're now using the
<a href="https://jothepro.github.io/doxygen-awesome-css/" target="_blank">Doxygen Awesome</a> theme,
which also has a dark mode.
</li>
<li>
Whereas trying to construct
<a href="classWt_1_1WApplication_1_1UpdateLock.html">UpdateLock</a> with a null
<a href="classWt_1_1WApplication.html">WApplication</a> pointer would cause a null
pointer dereference before, it now simply yields an unsuccessful UpdateLock
(<a href="https://github.com/emweb/wt/pull/195" target="_blank">PR #195</a>
by Steven K&ouml;hler).
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/10395" target="_blank">Issue #10395</a>:
<a href="classWt_1_1WPanel.html#a9671893042605eb936c7301f6de09d3f">WPanel::setTitleBar(false)</a>
now automatically calls
<a href="classWt_1_1WPanel.html#ace945a192f671220a5a2cda671dc37ca">WPanel::setCollapsible(false)</a>.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/9570" target="_blank">Issue #9570</a>:
All uses of <code>WT_CXX14</code> and <code>WT_CXX14ONLY</code> were removed in Wt's
source code. <code>WT_CXX14</code> is now always defined, since Wt <strong>requires</strong>
source code. <code>WT_CXX14</code> is now always defined, since Wt requires
C++14. We marked <code>Wt::cpp14::make_unique</code> as deprecated, since this only
existed because C++11 lacked <code>std::make_unique</code>.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/10924" target="_blank">Issue #10924</a>:
The undocumented <code>split-script</code> configuration property was removed, simplifying
Wt's internals.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/10914" target="_blank">Issue #10914</a>:
Changed some Boost.Phoenix includes to silence deprecation warnings.
Expand All @@ -157,41 +205,35 @@ <h3>Other</h3>
<a href="https://redmine.webtoolkit.eu/issues/9252" target="_blank">Issue #9252</a>:
Fixed a deprecation warning in the Pango font support implementation.
</li>
</ul>

<h3>Bug fixes</h3>

<ul>
<li>
<tt><a href="https://redmine.webtoolkit.eu/issues/9076" target="_blank">Issue #9076</a></tt>:
The Wt::WDateEdit gave a javascript error when opening the calendar popup if the application was rendered in widgetset mode.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/10966" target="_blank">Issue #10966</a>:
Added a JavaScript formatter to format Wt's JavaScript code.
Its usage is detailed in the Wt source tree at
<a
href="https://github.com/emweb/wt/blob/master/doc/development/javascript.md"
target="_blank"><code>doc/development/javascript.md</code></a>.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/10924" target="_blank">Issue #10924</a>:
The undocumented <code>split-script</code> configuration property was removed, simplifying
Wt's internals.
<a href="https://redmine.webtoolkit.eu/issues/9076" target="_blank">Issue #9076</a>:
<a href="classWt_1_1WDateEdit.html">WDateEdit</a>
gave a javascript error when opening the calendar popup if the
application was rendered in
<a href="namespaceWt.html#af4b6ed5fd28b4f5fa141b153c1107349accf2281a355c2c9cd4698ac30bea7820">WidgetSet</a>
mode.
</li>
<li>
Added <a href="namespaceWt_1_1Utils.html#a13d154e4ef34ee6f8c1a90e8aaeec0dc">Wt::Utils::htmlAttributeValue()</a>
to escape values if they are put into the value of an HTML tag.
<a href="https://redmine.webtoolkit.eu/issues/10488" target="_blank">Issue #10488</a>:
Long polling requests interrupted on the server side now no longer prevent keep alive requests from being sent,
and thus the session from timing out. This was possible when Wt is deployed behind a reverse proxy that has
a shorter request timeout than the <code>&lt;server-push-timeout&gt;</code>
configured in <code>wt_config.xml</code>.
</li>
</ul>

<h2>Release 4.8.3 (December 2022)</h2>
<h2>Release 4.8.3 (December 22, 2022)</h2>

<p>
Wt 4.8.3 is a patch release that addresses the following issues:
</p>

<ul>
<li>
<a href="https://redmine.webtoolkit.eu/issues/10995" target="_blank">Issue #10995</a>:
fixed an issue with <a href="classWt_1_1WContainerWidget.html">WContainerWidget</a>
where a session could terminate with the text "WContainerWidget: error parsing: undefined".
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/11105" target="_blank">Issue #11105</a>:
Wt has a built-in redirect mechanism that prevents the <code>Referer</code> header from showing
Expand All @@ -205,6 +247,11 @@ <h2>Release 4.8.3 (December 2022)</h2>
We have renamed this header to <code>X-Wt-Redirect-Secret</code> to better indicate the fact that this
header is nonstandard, and will only accept this header if it is coming from a trusted reverse proxy.
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/10995" target="_blank">Issue #10995</a>:
fixed an issue with <a href="classWt_1_1WContainerWidget.html">WContainerWidget</a>
where a session could terminate with the text "WContainerWidget: error parsing: undefined".
</li>
<li>
<a href="https://redmine.webtoolkit.eu/issues/11101" target="_blank">Issue #11101</a>:
fixed a data race when using dedicated session processes.
Expand Down

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