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LibHTML: Implement the <blink> element

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Just in time for Serenity's 1st birthday, here is the <blink> element!

This patch adds a bunch of different mechanisms to enable partial
repaints of the layout tree (LayoutNode::set_needs_display()))
It also adds LayoutNode::is_visible(), which can be toggled to prevent
a LayoutNode from rendering anything (it still takes up space though.)
This commit is contained in:
Andreas Kling 2019-10-09 21:25:29 +02:00
parent 33043941f9
commit fdbad6284c
Notes: sideshowbarker 2024-07-19 11:44:38 +09:00
16 changed files with 140 additions and 0 deletions
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27
Libraries/LibHTML/DOM/HTMLBlinkElement.cpp Normal file
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#include <LibCore/CTimer.h>
#include <LibHTML/CSS/StyleProperties.h>
#include <LibHTML/CSS/StyleValue.h>
#include <LibHTML/DOM/HTMLBlinkElement.h>
#include <LibHTML/Layout/LayoutNode.h>
HTMLBlinkElement::HTMLBlinkElement(Document& document, const String& tag_name)
: HTMLElement(document, tag_name)
, m_timer(CTimer::construct())
{
m_timer->set_interval(500);
m_timer->on_timeout = [this] { blink(); };
m_timer->start();
}
HTMLBlinkElement::~HTMLBlinkElement()
{
}
void HTMLBlinkElement::blink()
{
if (!layout_node())
return;
layout_node()->set_visible(!layout_node()->is_visible());
layout_node()->set_needs_display();
}