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LibWeb+LibGfx: Defer @font-face fetches until a codepoint renders

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This commit is contained in:
Johan Dahlin
2026-04-21 22:18:29 +02:00
committed by Andreas Kling
parent 0de26af387
commit acabf765c1
Notes: github-actions[bot] 2026-04-25 15:07:59 +00:00 
Author: https://github.com/jdahlin
Commit: https://github.com/LadybirdBrowser/ladybird/commit/acabf765c1f
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/9032
Reviewed-by: https://github.com/Psychpsyo
6 changed files with 108 additions and 10 deletions
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5
Libraries/LibWeb/CSS/FontFaceSet.cpp
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@@ -379,6 +379,11 @@ void FontFaceSet::set_is_pending_on_the_environment(bool is_pending_on_the_envir
// Spec issue: https://github.com/w3c/csswg-drafts/issues/13538#issuecomment-3933951987
if (m_set_entries->set_size() == 0 || (m_is_stuck_on_the_environment && m_loading_fonts.is_empty()))
switch_to_loaded();
// AD-HOC: Also switch when nothing has ever entered the LoadingFonts list — an empty set, or a set whose
// entries all have deferred unicode-ranges that no rendered codepoint matched. Without this the
// ready promise stays pending forever.
else if (m_loading_fonts.is_empty())
switch_to_loaded();
// 2. If the FontFaceSet is stuck on the environment, unmark it as such.
m_is_stuck_on_the_environment = false;