Added scroll()

kiln-core/src/script.rs

@@ -45,12 +45,12 @@
 //!
 //! `Queue.length()`, `Queue.clear()`, `Queue.peek()`, `Queue.pop()`, `Queue.push(map)`
 
-use crate::action::{action_to_map, rhai_action_module, Action, MOVE_COST};
+use crate::action::{action_to_map, rhai_action_module, Action, ScrollLine, MOVE_COST};
 use crate::board::Board;
 use crate::log::LogLine;
 use crate::map_file::{color_to_hex, parse_color};
 use crate::utils::{Direction, ObjectId, ScriptArg};
-use rhai::{CallFnOptions, Dynamic, Engine, FuncArgs, ImmutableString, NativeCallContext, Scope, AST};
+use rhai::{Array, CallFnOptions, Dynamic, Engine, FuncArgs, ImmutableString, NativeCallContext, Scope, AST};
 use std::cell::RefCell;
 use std::collections::{HashMap, HashSet, VecDeque};
 use std::rc::Rc;
@@ -613,6 +613,27 @@ fn register_write_api(engine: &mut Engine, queues: &QueueMap) {
         emit(&q, source_of(&ctx), Action::Say(msg.to_string()));
     });
 
+    // scroll(lines): open a full-screen scrollable overlay. Each element of `lines`
+    // is either a plain string (text) or a 2-element array [choice_key, display_text].
+    let q = queues.clone();
+    engine.register_fn("scroll", move |ctx: NativeCallContext, arr: Array| {
+        let lines = arr.into_iter().filter_map(|item| {
+            if let Ok(s) = item.clone().into_string() {
+                Some(ScrollLine::Text(s))
+            } else {
+                let pair: Vec<Dynamic> = item.into_array().ok()?;
+                if pair.len() == 2 {
+                    let choice  = pair[0].clone().into_string().ok()?;
+                    let display = pair[1].clone().into_string().ok()?;
+                    Some(ScrollLine::Choice { choice, display })
+                } else {
+                    None
+                }
+            }
+        }).collect();
+        emit(&q, source_of(&ctx), Action::Scroll(lines));
+    });
+
     let q = queues.clone();
     engine.register_fn(
         "set_tag",