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LibWeb: Implement scroll_{width, height}

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stelar7 2023-05-21 03:01:51 +02:00 • committed by Andreas Kling
parent 5ad24156ce
commit 17d6ab2416
1 changed files with 58 additions and 4 deletions
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62
Userland/Libraries/LibWeb/DOM/Element.cpp
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@ -1119,16 +1119,70 @@ void Element::set_scroll_top(double y)
box->set_scroll_offset(scroll_offset);
}
// https://drafts.csswg.org/cssom-view/#dom-element-scrollwidth
int Element::scroll_width() const
{
dbgln("FIXME: Implement Element::scroll_width() (called on element: {})", debug_description());
return 0;
// 1. Let document be the element’s node document.
auto& document = this->document();
// 2. If document is not the active document, return zero and terminate these steps.
if (!document.is_active())
return 0;
// 3. Let viewport width be the width of the viewport excluding the width of the scroll bar, if any,
// or zero if there is no viewport.
auto viewport_width = document.browsing_context()->viewport_rect().width().value();
auto viewport_scroll_width = document.browsing_context()->size().width().value();
// 4. If the element is the root element and document is not in quirks mode
// return max(viewport scrolling area width, viewport width).
if (document.document_element() == this && !document.in_quirks_mode())
return max(viewport_scroll_width, viewport_width);
// 5. If the element is the body element, document is in quirks mode and the element is not potentially scrollable,
// return max(viewport scrolling area width, viewport width).
if (document.body() == this && document.in_quirks_mode() && !is_potentially_scrollable())
return max(viewport_scroll_width, viewport_width);
// 6. If the element does not have any associated box return zero and terminate these steps.
if (!paintable_box())
return 0;
// 7. Return the width of the element’s scrolling area.
return paintable_box()->border_box_width().value();
}
// https://drafts.csswg.org/cssom-view/#dom-element-scrollheight
int Element::scroll_height() const
{
dbgln("FIXME: Implement Element::scroll_height() (called on element: {})", debug_description());
return 0;
// 1. Let document be the element’s node document.
auto& document = this->document();
// 2. If document is not the active document, return zero and terminate these steps.
if (!document.is_active())
return 0;
// 3. Let viewport height be the height of the viewport excluding the height of the scroll bar, if any,
// or zero if there is no viewport.
auto viewport_height = document.browsing_context()->viewport_rect().height().value();
auto viewport_scroll_height = document.browsing_context()->size().height().value();
// 4. If the element is the root element and document is not in quirks mode
// return max(viewport scrolling area height, viewport height).
if (document.document_element() == this && !document.in_quirks_mode())
return max(viewport_scroll_height, viewport_height);
// 5. If the element is the body element, document is in quirks mode and the element is not potentially scrollable,
// return max(viewport scrolling area height, viewport height).
if (document.body() == this && document.in_quirks_mode() && !is_potentially_scrollable())
return max(viewport_scroll_height, viewport_height);
// 6. If the element does not have any associated box return zero and terminate these steps.
if (!paintable_box())
return 0;
// 7. Return the height of the element’s scrolling area.
return paintable_box()->border_box_height().value();
}
// https://html.spec.whatwg.org/multipage/semantics-other.html#concept-element-disabled