ComputedTextComponent.h File Reference

#include "donner/base/Length.h"
#include "donner/base/RcString.h"
#include "donner/base/SmallVector.h"

Include dependency graph for ComputedTextComponent.h:

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...

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 xml_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

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

A contiguous slice of text with fully resolved layout attributes.

Offsets start and end refer to UTF-8 byte positions into the parent string stored in text. All coordinate and rotation values are given in the user coordinate system and already include any inherited transformations from ancestor "<text>" elements.

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

Class Members
Lengthd	dx	Relative X shift applied to the span.
Lengthd	dy	Relative Y shift applied to the span.
size_t	end	Byte index (exclusive) one past the last code unit of the span within text.
double	rotateDegrees = 0.0	Rotation applied to each glyph in the span (degrees).
size_t	start	Byte index (inclusive) of the first code unit of the span within text.
RcString	text	Back‑reference to the original text for this span.
Lengthd	x	Absolute X position for the first glyph of the span.
Lengthd	y	Absolute Y baseline position for the span.