# segment_card


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## Card Metadata

Left side of the card showing index and timestamp.

## View Mode Content

Standard text display when card is not in split mode.

## Split Mode Content

Interactive token grid with caret indicator for splitting. Uses the
`cjm-fasthtml-token-selector` library for token rendering and
navigation.

## Card Actions

Hover-visible action buttons for merge and split.

## Main Card Renderer

------------------------------------------------------------------------

### render_segment_card

``` python

def render_segment_card(
    segment:TextSegment, # Segment to render
    card_role:Literal, # Role of this card in viewport ("focused" or "context")
    is_split_mode:bool, # Whether this card is in split mode
    caret_position:int, # Caret position for split mode (word index)
    split_url:str, # URL to execute split
    merge_url:str, # URL to merge with previous
    enter_split_url:str, # URL to enter split mode
    exit_split_url:str, # URL to exit split mode
    is_first_segment:bool=False, # Whether this is the first segment (can't merge)
    has_boundary_above:bool=False, # Source boundary exists above this card
    has_boundary_below:bool=False, # Source boundary exists below this card
)->Any: # Segment card component

```

*Render a segment card with view or split mode content.*

## Card Renderer Factory

Creates a card renderer callback that captures split/merge URLs and mode
state, compatible with the card stack viewport’s `render_card`
parameter.

------------------------------------------------------------------------

### create_segment_card_renderer

``` python

def create_segment_card_renderer(
    split_url:str='', # URL to execute split
    merge_url:str='', # URL to merge with previous
    enter_split_url:str='', # URL to enter split mode
    exit_split_url:str='', # URL to exit split mode
    is_split_mode:bool=False, # Whether split mode is active
    caret_position:int=0, # Caret position for split mode (word index)
    source_boundaries:Set=None, # Indices where source_id changes
)->Callable: # Card renderer callback: (item, CardRenderContext) -> FT

```

*Create a card renderer callback for segment cards.*