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LibWeb: Cache width of "alt" text in ImageBox
We were constantly measuring and re-measuring the "alt" attribute text of ImageBox layout nodes, even when the alt text didn't change. By caching this, we avoid a *lot* of repeated text measurement work.
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3 changed files with 21 additions and 1 deletions
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@ -29,6 +29,8 @@ public:
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auto const& image_loader() const { return m_image_loader; }
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void dom_node_did_update_alt_text(Badge<HTML::HTMLImageElement>);
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private:
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// ^BrowsingContext::ViewportClient
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virtual void browsing_context_did_set_viewport_rect(Gfx::IntRect const&) final;
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@ -37,6 +39,8 @@ private:
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int preferred_height() const;
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ImageLoader const& m_image_loader;
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Optional<float> m_cached_alt_text_width;
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};
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}
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