Struct ChatState 

pub struct ChatState {
    pub image_click_map: Vec<(u16, ImageClickTarget)>,
    pub last_scroll_position: u16,
    pub last_chat_area: Option<(u16, u16, u16, u16)>,
    /* private fields */
}

State for the chat widget

Fields

image_click_map: Vec<(u16, ImageClickTarget)>

Click map: content line number → image target (rebuilt every render)

last_scroll_position: u16

Scroll position used in last render (for coordinate mapping)

last_chat_area: Option<(u16, u16, u16, u16)>

Chat area rect from last render

Implementations

impl ChatState

pub fn new() -> Self

Create a new chat state (starts in auto-follow mode)

pub fn get_scroll_position( &self, content_height: u16, viewport_height: u16, ) -> u16

Get the scroll position for rendering scroll_offset represents distance from bottom, convert to ratatui scroll position

pub fn scroll_up(&mut self, amount: u16)

Scroll viewport up (shows older messages further from bottom)

pub fn scroll_down(&mut self, amount: u16)

Scroll viewport down (shows newer messages closer to bottom) Automatically resumes auto-scroll when reaching the bottom

pub fn resume_auto_scroll(&mut self)

Force resume auto-scroll mode (jump to bottom)

pub fn is_manually_scrolling(&self) -> bool

Check if user is manually scrolling (not following bottom)

pub fn find_image_at_screen_pos( &self, screen_row: u16, ) -> Option<&ImageClickTarget>

Find an image click target at the given screen coordinates. Returns Some((message_index, image_index)) if an image indicator was clicked.

pub fn begin_selection(&mut self, screen_row: u16, screen_col: u16)

Begin a drag selection at the given screen position (mouse-down). Anchors and cursor both start here; a plain click with no drag selects nothing.

pub fn update_selection(&mut self, screen_row: u16, screen_col: u16)

Extend the in-progress selection to the given screen position (drag).

pub fn clear_selection(&mut self)

Drop any active selection (and its highlight).

pub fn selected_text(&self) -> Option<String>

Extract the currently-selected text from the last rendered frame, or None if there’s no selection or it’s empty (e.g. a plain click). Walks the retained per-row text and slices each row by display cells so CJK / wide glyphs are never split mid-cell.

Trait Implementations

impl Clone for ChatState

fn clone(&self) -> ChatState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ChatState

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

Formats the value using the given formatter.

impl Default for ChatState

fn default() -> Self

Returns the “default value” for a type.