ComputedTextComponent.h File Reference

#include <entt/entt.hpp>
#include <optional>
#include "donner/base/Length.h"
#include "donner/base/RcString.h"
#include "donner/base/SmallVector.h"
#include "donner/svg/components/RenderingInstanceComponent.h"
#include "donner/svg/core/DominantBaseline.h"
#include "donner/svg/core/FontStretch.h"
#include "donner/svg/core/FontStyle.h"
#include "donner/svg/core/FontVariant.h"
#include "donner/svg/core/LengthAdjust.h"
#include "donner/base/Path.h"
#include "donner/svg/core/Stroke.h"
#include "donner/svg/core/TextAnchor.h"
#include "donner/svg/core/TextDecoration.h"
#include "donner/svg/core/Visibility.h"

Include dependency graph for ComputedTextComponent.h:

This graph shows which files directly or indirectly include this file:

Classes
struct	donner::svg::components::ComputedTextComponent
	Pre‑computed layout information for a text subtree. More...
struct	donner::svg::components::ComputedTextComponent::TextSpan
	A contiguous slice of text with fully resolved layout attributes. More...
struct	donner::svg::components::ComputedTextComponent::TextSpan::AncestorShift
	Unresolved baseline-shift values from ancestor tspan elements. Each entry is the ancestor's (baseline-shift keyword, baseline-shift Lengthd, font-size in pixels). Layout engines resolve each entry using font OS/2 metrics for sub/super or toPixels() for explicit lengths, then sum to get the total ancestor shift. More...

Namespaces
namespace	donner
	Top-level Donner namespace, which is split into different sub-namespaces such as donner::svg and donner::css.
namespace	donner::svg
	Donner SVG library, which can load, manipulate and render SVG files.
namespace	donner::svg::components
	Contains the implementation of the Donner ECS,.

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Class Documentation

donner::svg::components::ComputedTextComponent

struct donner::svg::components::ComputedTextComponent

Pre‑computed layout information for a text subtree.

A ComputedTextComponent is attached by the layout system to the root "<text>" element after all "<text>", "<tspan>", and "<textPath>" descendants have been resolved. It stores the final, absolute positions for each contiguous slice of text, allowing the renderer to iterate quickly without re‑evaluating attribute vectors on every frame.

The component contains a single public field, spans, which is the computed list of text spans.

Note

This structure is internal to the rendering pipeline and is not exposed through the public DOM API.

Collaboration diagram for donner::svg::components::ComputedTextComponent:

Class Members
SmallVector< TextSpan, 1 >	spans

donner::svg::components::ComputedTextComponent::TextSpan::AncestorShift

struct donner::svg::components::ComputedTextComponent::TextSpan::AncestorShift

Unresolved baseline-shift values from ancestor tspan elements. Each entry is the ancestor's (baseline-shift keyword, baseline-shift Lengthd, font-size in pixels). Layout engines resolve each entry using font OS/2 metrics for sub/super or toPixels() for explicit lengths, then sum to get the total ancestor shift.

Collaboration diagram for donner::svg::components::ComputedTextComponent::TextSpan::AncestorShift:

Class Members
double	fontSizePx
BaselineShiftKeyword	keyword
Lengthd	shift