Struct LogColumns 

pub struct LogColumns { /* private fields */ }

What each column of a log samples: one column for a Trend Log, one per member for a Trend Log Multiple, None where the reference is empty; and, once read, the state texts of the objects whose states columns sample. The default names no column.

Implementations

impl LogColumns

pub fn applies(object_type: ObjectType) -> bool

Whether a log of object_type has a Log_DeviceObjectProperty to name its values by: a Trend Log or a Trend Log Multiple.

pub fn decode(data: &[u8]) -> Self

The columns a Log_DeviceObjectProperty value names, read whole: its references back to back. Octets that don’t decode to the end name no column, so the values print as the log gives them.

pub fn column(&self, column: usize) -> Option<LoggedProperty>

The property column column (from 0) samples, if named.

pub fn is_empty(&self) -> bool

Whether no column is named.

pub fn state_texts(&self, column: usize) -> &StateTexts

The state texts of the object column column samples, cleaned for display (StateTexts::cleaned); none unless they were read. A formatter made with them names the column’s states (ValueFormat::new). Device-supplied text: a front end shows it as data.

pub fn raw_state_texts(&self, column: usize) -> &StateTexts

Self::state_texts as the device sent them, uncleaned and uncut, for a front end that cleans device text its own way (the MCP server’s envelopes, which also say when they cut it).

pub async fn read_state_texts<F, Fut>( &mut self, log_device: Option<u32>, read: F, )

where F: FnMut(ObjectIdentifier) -> Fut, Fut: Future<Output = ControlFlow<(), StateTexts>>,

Read the state texts of the objects whose states the columns sample, each once, through read, and keep them to name those columns. log_device is the log’s device instance, when known: an object on another device is not read. read gives an object’s texts (empty ones for a refused read, which leaves its columns as they were) or breaks off the reading (a device gone silent, a spent budget). Nothing is read when no column samples a state.

Trait Implementations

impl Clone for LogColumns

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for LogColumns

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for LogColumns

fn default() -> Self

Returns the “default value” for a type.

impl Eq for LogColumns

impl FromIterator<Option<LoggedProperty>> for LogColumns

fn from_iter<I: IntoIterator<Item = Option<LoggedProperty>>>(columns: I) -> Self

The columns in order, None for one nothing names.

impl PartialEq for LogColumns

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for LogColumns