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LibWeb: Some improvements to absolute positioning

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Absolutely positioned blocks now register themselves with their
containing block (and note that the containing block of an absolutely
positioned box is the nearest non-statically positioned block ancestor
or the ICB as fallback.)

Containing blocks then drive the layout of their tracked absolutely
positioned descendants as a separate layout pass.

This is very far from perfect but the general direction seems good.
This commit is contained in:
Andreas Kling 2020-06-12 13:27:28 +02:00
parent ff2c949d70
commit 260427f0ad
8 changed files with 166 additions and 24 deletions
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2
Libraries/LibWeb/Layout/LayoutDocument.cpp
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@ -58,6 +58,8 @@ void LayoutDocument::layout(LayoutMode layout_mode)
});
set_height(lowest_bottom);
layout_absolute_descendants();
// FIXME: This is a total hack. Make sure any GUI::Widgets are moved into place after layout.
// We should stop embedding GUI::Widgets entirely, since that won't work out-of-process.
for_each_in_subtree_of_type<LayoutWidget>([&](auto& widget) {