Returns a Surface @param surfaceId Unique Surface identifier @return Surface instance, or null if not found @hide

Parse boolean value

ProcessChunk processes a chunk of text and returns any complete A2UI messages found. This is the primary entry point for the streaming parser.

Returns the component factory for the given type @param componentType Component type @return Component factory instance, or null if not found

Helper: check if a string is a calc() expression

selectCatalog selects the component catalog based on client capabilities.

LoadExamples loads and optionally validates examples from a directory or glob pattern.

ParseResponse parses the LLM response into a list of ResponsePart objects. It extracts A2UI JSON blocks delimited by <a2ui-json> and </a2ui-json> tag

SurfaceID returns the current surface ID.

Bounding box of all current frames; drives content size. Uses Level-2 cache when available (invalidated together with Level-1 in onMeasure). Mirrors

Helper: convert hex character to integer value (0-15), returns 16 on error

Parse a single CSS length token (e.g. "12px", "12em", or numeric JSON value). Returns true on success and writes the a2ui-px value into `outPx`.

Parses the snapshot JSON serialized from C++ `ComponentSnapshot.stringify()`.

Registers a custom component factory <p> If the component type already exists, it will be overwritten. Takes effect immediately after registration and

CatalogID returns the catalog ID from the catalog schema.

Creates a success result. @param data Return value (String / JSONObject / JSONArray / Number / Boolean / null)

Extracts the styles object from properties. styles may be: 1. Map<String, Object> - used directly 2. String (JSON) - parsed first 3. null

* @brief Whether this component has any pending dirty attribute marks. */

Read file content from assets

Removes a Surface listener @param listener ISurfaceManagerListener instance

Sets the corner radius

* @brief Set inner guards that are cascaded on beginBatch/endBatch. * * When this guard opens a batch window (outermost beginBatch), it also

* @brief Get the length of the UTF-8 string. */

Submits a UI data model change to the Native layer @param surfaceId Surface ID @param componentId Component ID @param changeData Changed content (

Trim leading/trailing ASCII whitespace.

RemoveStrictValidation recursively removes additionalProperties: false from a JSON schema, making it more lenient for LLM-generated output.

WithPruning returns a new catalog with pruned components and messages.

Close drawer

Destroys the Engine and releases all Native resources. This method should be called when the application exits.

fixJSON attempts to fix a partial JSON fragment by adding missing closing delimiters.

Returns the default animation duration in milliseconds.

Returns the default transition animation.

Check if logging is currently enabled. @return true if logging is enabled

* @brief Check whether the layout info is valid * @return false if all values are 0, true otherwise */

Parse a font-weight string to ArkUI enum (for render layer). Accepts "bold", "normal", or numeric string ("100".."900"). Returns ARKUI_FONT_WEIGHT_BOL