Dyn_FieldWatcher - watch a field in a DynModule and call Runnable in module queue. might work for non-persistent fields now too [1022885]

< > BotCompany Repo | #1022885 // Dyn_FieldWatcher - watch a field in a DynModule and call Runnable in module queue. might work for non-persistent fields now too

JavaX fragment (include) [tags: use-pretranspiled]

sclass Dyn_FieldWatcher is AutoCloseable {
  DynModule module;
  S field;
  O value;
  Runnable action;
  
  Runnable changeListener = r check;
  VF1<S> fieldChangeListener = voidfunc(S f) {
    if (eq(f, field))
      check();
  };
  
  swappable O cloneValue(O o) { ret o; }
  
  *(DynModule module, S field, Runnable action) {
    this(module, field, action, null);
  }
  
  *(DynModule *module, S *field, Runnable *action, IF1 *cloneValue) {
    value = cloneValue(get(module, field));
    
    // Let's do both for safety
    module.onChange(changeListener);
    module.onFieldChange(fieldChangeListener);
  }
  
  void check {
    O newValue = cloneValue(get(module, field));
    if (eq(value, newValue)) ret;
    value = newValue;
    dm_q(module, action);
  }
  
  close {
    module.removeChangeListener(changeListener);
    module.removeFieldChangeListener(fieldChangeListener);
  }
}

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Snippet ID:

#1022885

Snippet name:

Dyn_FieldWatcher - watch a field in a DynModule and call Runnable in module queue. might work for non-persistent fields now too

Eternal ID of this version:

#1022885/12

Text MD5:

45192cec7a0bebe1bf64b4a652878042

Transpilation MD5:

6b1d3f7eb1cc5648b4273db5bbae92c9

Author:

stefan

Category:

javax / stefan's os

Type:

JavaX fragment (include)

Public (visible to everyone):

Yes

Archived (hidden from active list):

Created/modified:

2022-01-21 18:37:01

Source code size:

931 bytes / 38 lines

Pitched / IR pitched:

No / No

Views / Downloads:

610 / 1224

Version history:

11 change(s)

Referenced in:

[show references]

1	sclass Dyn_FieldWatcher is AutoCloseable {
2	DynModule module;
3	S field;
4	O value;
5	Runnable action;
6
7	Runnable changeListener = r check;
8	VF1<S> fieldChangeListener = voidfunc(S f) {
9	if (eq(f, field))
10	check();
11	};
12
13	swappable O cloneValue(O o) { ret o; }
14
15	*(DynModule module, S field, Runnable action) {
16	this(module, field, action, null);
17	}
18
19	(DynModule module, S field, Runnable action, IF1 *cloneValue) {
20	value = cloneValue(get(module, field));
21
22	// Let's do both for safety
23	module.onChange(changeListener);
24	module.onFieldChange(fieldChangeListener);
25	}
26
27	void check {
28	O newValue = cloneValue(get(module, field));
29	if (eq(value, newValue)) ret;
30	value = newValue;
31	dm_q(module, action);
32	}
33
34	close {
35	module.removeChangeListener(changeListener);
36	module.removeFieldChangeListener(fieldChangeListener);
37	}
38	}