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ladybird/Libraries/LibWeb/Layout/ImageBox.h

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Meta: Add license header to source files As suggested by Joshua, this commit adds the 2-clause BSD license as a comment block to the top of every source file. For the first pass, I've just added myself for simplicity. I encourage everyone to add themselves as copyright holders of any file they've added or modified in some significant way. If I've added myself in error somewhere, feel free to replace it with the appropriate copyright holder instead. Going forward, all new source files should include a license header.
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/*
Meta: Update my e-mail address everywhere
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* Copyright (c) 2018-2020, Andreas Kling <andreas@ladybird.org>
Meta: Add license header to source files As suggested by Joshua, this commit adds the 2-clause BSD license as a comment block to the top of every source file. For the first pass, I've just added myself for simplicity. I encourage everyone to add themselves as copyright holders of any file they've added or modified in some significant way. If I've added myself in error somewhere, feel free to replace it with the appropriate copyright holder instead. Going forward, all new source files should include a license header.
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*
Everything: Move to SPDX license identifiers in all files. SPDX License Identifiers are a more compact / standardized way of representing file license information. See: https://spdx.dev/resources/use/#identifiers This was done with the `ambr` search and replace tool. ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
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* SPDX-License-Identifier: BSD-2-Clause
Meta: Add license header to source files As suggested by Joshua, this commit adds the 2-clause BSD license as a comment block to the top of every source file. For the first pass, I've just added myself for simplicity. I encourage everyone to add themselves as copyright holders of any file they've added or modified in some significant way. If I've added myself in error somewhere, feel free to replace it with the appropriate copyright holder instead. Going forward, all new source files should include a license header.
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*/
LibHTML: Flesh out <img> element with LayoutImage and LayoutReplaced This patch adds parsing of <img> into HTMLImageElement objects. It also adds LayoutImage and its parent class LayoutReplaced, which is going to represent CSS "replaced elements."
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#pragma once
LibWeb: Move HTML object model stuff into LibWeb/HTML/ Take a hint from SVG and more all the HTML classes into HTML instead of mixing them with the DOM classes.
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#include <LibWeb/HTML/HTMLImageElement.h>
LibWeb: Rename LayoutNode classes and move them into Layout namespace Bring the names of various boxes closer to spec language. This should hopefully make things easier to understand and hack on. :^) Some notable changes: - LayoutNode -> Layout::Node - LayoutBox -> Layout::Box - LayoutBlock -> Layout::BlockBox - LayoutReplaced -> Layout::ReplacedBox - LayoutDocument -> Layout::InitialContainingBlockBox - LayoutText -> Layout::TextNode - LayoutInline -> Layout::InlineNode Note that this is not strictly a "box tree" as we also hang inline/text nodes in the same tree, and they don't generate boxes. (Instead, they contribute line box fragments to their containing block!)
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#include <LibWeb/Layout/ReplacedBox.h>
LibHTML: Flesh out <img> element with LayoutImage and LayoutReplaced This patch adds parsing of <img> into HTMLImageElement objects. It also adds LayoutImage and its parent class LayoutReplaced, which is going to represent CSS "replaced elements."
2019-10-05 17:07:45 -03:00
LibWeb: Rename LayoutNode classes and move them into Layout namespace Bring the names of various boxes closer to spec language. This should hopefully make things easier to understand and hack on. :^) Some notable changes: - LayoutNode -> Layout::Node - LayoutBox -> Layout::Box - LayoutBlock -> Layout::BlockBox - LayoutReplaced -> Layout::ReplacedBox - LayoutDocument -> Layout::InitialContainingBlockBox - LayoutText -> Layout::TextNode - LayoutInline -> Layout::InlineNode Note that this is not strictly a "box tree" as we also hang inline/text nodes in the same tree, and they don't generate boxes. (Instead, they contribute line box fragments to their containing block!)
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namespace Web::Layout {
LibWeb: Move everything into the Web namespace
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LibWeb: Move image viewport awareness from ImageBox to ImagePaintable Images being aware of being visible inside the viewport is a painting concern, not a layout concern.
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class ImageBox final : public ReplacedBox {
LibGC+Everywhere: Factor out a LibGC from LibJS Resulting in a massive rename across almost everywhere! Alongside the namespace change, we now have the following names: * JS::NonnullGCPtr -> GC::Ref * JS::GCPtr -> GC::Ptr * JS::HeapFunction -> GC::Function * JS::CellImpl -> GC::Cell * JS::Handle -> GC::Root
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GC_CELL(ImageBox, ReplacedBox);
GC_DECLARE_ALLOCATOR(ImageBox);
LibWeb: Make the layout tree GC-allocated This removes a set of complex reference cycles between DOM, layout tree and browsing context. It also makes lifetimes much easier to reason about, as the DOM and layout trees are now free to keep each other alive.
2022-10-17 09:41:50 -03:00
LibHTML: Flesh out <img> element with LayoutImage and LayoutReplaced This patch adds parsing of <img> into HTMLImageElement objects. It also adds LayoutImage and its parent class LayoutReplaced, which is going to represent CSS "replaced elements."
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public:
LibWeb: Allow Layout::ImageBox to be anonymous This is prep work for CSS content:image, which means pseudo-elements can be used to generate images without a corresponding DOM node.
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ImageBox(DOM::Document&, GC::Ptr<DOM::Element>, GC::Ref<CSS::ComputedProperties>, ImageProvider const&);
LibWeb: Rename LayoutNode classes and move them into Layout namespace Bring the names of various boxes closer to spec language. This should hopefully make things easier to understand and hack on. :^) Some notable changes: - LayoutNode -> Layout::Node - LayoutBox -> Layout::Box - LayoutBlock -> Layout::BlockBox - LayoutReplaced -> Layout::ReplacedBox - LayoutDocument -> Layout::InitialContainingBlockBox - LayoutText -> Layout::TextNode - LayoutInline -> Layout::InlineNode Note that this is not strictly a "box tree" as we also hang inline/text nodes in the same tree, and they don't generate boxes. (Instead, they contribute line box fragments to their containing block!)
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virtual ~ImageBox() override;
LibHTML: Flesh out <img> element with LayoutImage and LayoutReplaced This patch adds parsing of <img> into HTMLImageElement objects. It also adds LayoutImage and its parent class LayoutReplaced, which is going to represent CSS "replaced elements."
2019-10-05 17:07:45 -03:00
LibWeb: Reorganize layout system in terms of formatting contexts This is a first (huge) step towards modernizing the layout architecture and bringing it closer to spec language. Layout is now performed by a stack of formatting contexts, operating on the box tree (or layout tree, if you will.) There are currently three types of formatting context: - BlockFormattingContext (BFC) - InlineFormattingContext (IFC) - TableFormattingContext (TFC) Document::layout() creates the initial BlockFormattingContext (BFC) which lays out the initial containing block (ICB), and then we recurse through the tree, creating BFC, IFC or TFC as appropriate and handing over control at the context boundaries. The majority of this patch is just refactoring the old logic spread out in LayoutBlock and LayoutTableRowGroup, and turning into these context classes instead. A lot more cleanup will be needed. There are many architectural wins here, the main one being that layout is no longer performed by boxes themselves, which gives us much greater flexibility in the outer/inner layout of a given box.
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virtual void prepare_for_replaced_layout() override;
LibHTML: Flesh out <img> element with LayoutImage and LayoutReplaced This patch adds parsing of <img> into HTMLImageElement objects. It also adds LayoutImage and its parent class LayoutReplaced, which is going to represent CSS "replaced elements."
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LibHTML: Implement basic layout for inline <img alt> LayoutReplaced objects can now participate in inline layout. It's very hackish, but basically LayoutReplaced will just add itself to the last line in the containing block. This patch gets rid of the idea that only LayoutInline subclasses can be split into lines, by moving the split_into_lines() virtual up to LayoutNode and overriding it in LayoutReplaced.
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bool renders_as_alt_text() const;
LibGC+Everywhere: Factor out a LibGC from LibJS Resulting in a massive rename across almost everywhere! Alongside the namespace change, we now have the following names: * JS::NonnullGCPtr -> GC::Ref * JS::GCPtr -> GC::Ptr * JS::HeapFunction -> GC::Function * JS::CellImpl -> GC::Cell * JS::Handle -> GC::Root
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virtual GC::Ptr<Painting::Paintable> create_paintable() const override;
LibWeb: Let Paintable perform the painting This patch adds a bunch of Paintable subclasses, each corresponding to the Layout::Node subclasses that had a paint() override. All painting logic is moved from layout nodes into their corresponding paintables. Paintables are now created by asking a Layout::Box to produce one: static NonnullOwnPtr<Paintable> Layout::Box::create_paintable() Note that inline nodes still have their painting logic. Since they are not boxes, and all paintables have a corresponding box, we'll need to come up with some other solution for them.
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LibWeb: Don't force HTMLImageElement to have a legacy ImageLoader We achieve this by adding a new Layout::ImageProvider class and having both HTMLImageElement and HTMLObjectElement inherit from it. The HTML spec is vague on how object image loading should work, which is why this first pass is focusing on image elements.
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auto const& image_provider() const { return m_image_provider; }
auto& image_provider() { return m_image_provider; }
LibWeb: Let Paintable perform the painting This patch adds a bunch of Paintable subclasses, each corresponding to the Layout::Node subclasses that had a paint() override. All painting logic is moved from layout nodes into their corresponding paintables. Paintables are now created by asking a Layout::Box to produce one: static NonnullOwnPtr<Paintable> Layout::Box::create_paintable() Note that inline nodes still have their painting logic. Since they are not boxes, and all paintables have a corresponding box, we'll need to come up with some other solution for them.
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LibWeb: Generalize ImageBox and ImagePaintable for any ImageProvider They currently assume the DOM node is an HTMLImageElement with respect to handling the alt attribute. The HTMLInputElement will require the same behavior.
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void dom_node_did_update_alt_text(Badge<ImageProvider>);
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.
2022-09-07 11:46:05 -03:00
LibHTML: Flesh out <img> element with LayoutImage and LayoutReplaced This patch adds parsing of <img> into HTMLImageElement objects. It also adds LayoutImage and its parent class LayoutReplaced, which is going to represent CSS "replaced elements."
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private:
LibWeb: Visit ImageProvider from Layout::ImageBox Adds missing visit of HTMLElement that serves as image provider of image layout node.
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virtual void visit_edges(Visitor&) override;
LibWeb: Don't force HTMLImageElement to have a legacy ImageLoader We achieve this by adding a new Layout::ImageProvider class and having both HTMLImageElement and HTMLObjectElement inherit from it. The HTML spec is vague on how object image loading should work, which is why this first pass is focusing on image elements.
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ImageProvider const& m_image_provider;
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.
2022-09-07 11:46:05 -03:00
LibWeb: Convert Layout Boxes to new pixel units
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Optional<CSSPixels> m_cached_alt_text_width;
LibHTML: Flesh out <img> element with LayoutImage and LayoutReplaced This patch adds parsing of <img> into HTMLImageElement objects. It also adds LayoutImage and its parent class LayoutReplaced, which is going to represent CSS "replaced elements."
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};
LibHTML: Add LayoutNode::is_image() and is<LayoutImage> helper
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}
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