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LibWeb: Convert images to common AbstractImageStyleValue base

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This commit moves both the ImageStyleValue and LinearGradientStyleValue
to a common base class of AbstractImageStyleValue. This abstracts
getting the natural_width/height, loading/resolving, and painting
the image.

Now for 'free' you get:

 - Linear gradients working with the various background sizing/repeat
   properties.
 - Linear gradients working as list-markers :^) -- best feature ever!

P.s. This commit is a little large as it's tricky to make this change
incrementally without breaking things.
This commit is contained in:
MacDue 2022-07-31 01:11:59 +01:00 • committed by Andreas Kling
parent 264543b90a
commit 6a6475673f
13 changed files with 140 additions and 70 deletions
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6
Userland/Libraries/LibWeb/Layout/BlockFormattingContext.cpp
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@ -765,9 +765,9 @@ void BlockFormattingContext::layout_list_item_marker(ListItemBox const& list_ite
int image_width = 0;
int image_height = 0;
if (auto const* list_style_image = marker.list_style_image_bitmap()) {
image_width = list_style_image->rect().width();
image_height = list_style_image->rect().height();
if (auto const* list_style_image = marker.list_style_image()) {
image_width = list_style_image->natural_width().value_or(0);
image_height = list_style_image->natural_height().value_or(0);
}
int default_marker_width = max(4, marker.font().glyph_height() - 4);