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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
16 changed files with 140 additions and 0 deletions
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5
Libraries/LibHTML/Layout/LineBoxFragment.cpp
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@ -5,6 +5,11 @@
void LineBoxFragment::render(RenderingContext& context)
{
for (auto* ancestor = layout_node().parent(); ancestor; ancestor = ancestor->parent()) {
if (!ancestor->is_visible())
return;
}
if (layout_node().is_text()) {
auto& layout_text = static_cast<const LayoutText&>(layout_node());
layout_text.render_fragment(context, *this);