donner::components::TreeMutationContext Struct Reference

Document-local hooks for tree mutations. More...

#include "donner/base/xml/components/TreeMutationContext.h"

Public Member Functions
	TreeMutationContext ()
	Default ctor installs the basic XML callbacks. Higher-level models (SVGDocument) overwrite the individual function fields after construction.

Static Public Member Functions
static void	DefaultInsertBefore (EntityHandle parent, EntityHandle newNode, EntityHandle referenceNode)
	Basic XML defaults — operate on TreeComponent directly.
static void	DefaultAppendChild (EntityHandle parent, EntityHandle child)
static void	DefaultReplaceChild (EntityHandle parent, EntityHandle newChild, EntityHandle oldChild)
static void	DefaultRemoveChild (EntityHandle parent, EntityHandle child)
static void	DefaultRemove (EntityHandle entity)

Public Attributes
std::function< void(EntityHandle parent, EntityHandle newNode, EntityHandle referenceNode)>	insertBefore
	Callback for insertBefore(parent, newNode, referenceNode).
std::function< void(EntityHandle parent, EntityHandle child)>	appendChild
	Callback for appendChild(parent, child).
std::function< void(EntityHandle parent, EntityHandle newChild, EntityHandle oldChild)>	replaceChild
	Callback for replaceChild(parent, newChild, oldChild).
std::function< void(EntityHandle parent, EntityHandle child)>	removeChild
	Callback for removeChild(parent, child).
std::function< void(EntityHandle entity)>	remove
	Callback for remove(entity).

Detailed Description

Document-local hooks for tree mutations.

Always installed in Registry::ctx() by the owning document model: XMLDocument installs the Default* callbacks below (which operate on TreeComponent directly), and higher-level models such as SVGDocument overwrite the individual callbacks after construction to layer invalidation and lifetime tracking on top. XMLNode mutation methods always go through the context, so the lookup never needs to fall back to a direct TreeComponent path — Registry::ctx().contains<TreeMutationContext>() is an invariant of any registry exposed through one of the document facades.

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The documentation for this struct was generated from the following file:

• donner/base/xml/components/TreeMutationContext.h