ribir_core 0.4.0-alpha.15

A non-intrusive declarative GUI framework, to build modern native/wasm cross-platform applications.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131

use super::*;
use crate::widget::*;

/// A writer splitted writer from another writer, and has its own notifier.
pub struct SplittedWriter<O, W> {
  origin: O,
  splitter: W,
  info: Sc<WriterInfo>,
}

impl<O, W> Drop for SplittedWriter<O, W> {
  fn drop(&mut self) { self.info.dec_writer() }
}

impl<V: ?Sized, O, W> StateReader for SplittedWriter<O, W>
where
  Self: 'static,
  O: StateWriter,
  W: Fn(&mut O::Value) -> PartData<V> + Clone,
{
  type Value = V;
  type OriginReader = O;
  type Reader = MapWriterAsReader<O::Reader, W>;

  #[track_caller]
  fn read(&self) -> ReadRef<Self::Value> {
    ReadRef::mut_as_ref_map(self.origin.read(), &self.splitter)
  }

  #[inline]
  fn clone_reader(&self) -> Self::Reader {
    MapWriterAsReader { origin: self.origin.clone_reader(), part_map: self.splitter.clone() }
  }

  #[inline]
  fn origin_reader(&self) -> &Self::OriginReader { &self.origin }

  #[inline]
  fn try_into_value(self) -> Result<Self::Value, Self>
  where
    Self::Value: Sized,
  {
    Err(self)
  }
}

impl<V: ?Sized, O, W> StateWatcher for SplittedWriter<O, W>
where
  Self: 'static,
  O: StateWriter,
  W: Fn(&mut O::Value) -> PartData<V> + Clone,
{
  fn raw_modifies(&self) -> CloneableBoxOp<'static, ModifyScope, std::convert::Infallible> {
    self.info.notifier.raw_modifies().box_it()
  }
}

impl<V: ?Sized, O, W> StateWriter for SplittedWriter<O, W>
where
  Self: 'static,
  O: StateWriter,
  W: Fn(&mut O::Value) -> PartData<V> + Clone,
{
  type Writer = SplittedWriter<O::Writer, W>;
  type OriginWriter = O;

  fn into_reader(self) -> Result<Self::Reader, Self> {
    if self.info.writer_count.get() == 1 { Ok(self.clone_reader()) } else { Err(self) }
  }

  #[inline]
  fn write(&self) -> WriteRef<Self::Value> { self.split_ref(self.origin.write()) }

  #[inline]
  fn silent(&self) -> WriteRef<Self::Value> { self.split_ref(self.origin.silent()) }

  #[inline]
  fn shallow(&self) -> WriteRef<Self::Value> { self.split_ref(self.origin.shallow()) }

  fn clone_writer(&self) -> Self::Writer {
    self.info.inc_writer();
    SplittedWriter {
      origin: self.origin.clone_writer(),
      splitter: self.splitter.clone(),
      info: self.info.clone(),
    }
  }

  #[inline]
  fn origin_writer(&self) -> &Self::OriginWriter { &self.origin }
}

impl<V: ?Sized, O, W> SplittedWriter<O, W>
where
  O: StateWriter,
  W: Fn(&mut O::Value) -> PartData<V> + Clone,
{
  pub(super) fn new(origin: O, mut_map: W) -> Self {
    Self { origin, splitter: mut_map, info: Sc::new(WriterInfo::new()) }
  }

  #[track_caller]
  fn split_ref<'a>(&'a self, mut orig: WriteRef<'a, O::Value>) -> WriteRef<'a, V> {
    let modify_scope = orig.modify_scope;

    // the origin mark as a silent write, because split writer not effect the origin
    // state in ribir framework level. But keep notify in the data level.
    assert!(!orig.modified);
    orig.modify_scope.remove(ModifyScope::FRAMEWORK);
    orig.modified = true;
    let value =
      ValueMutRef { inner: (self.splitter)(&mut orig.value), borrow: orig.value.borrow.clone() };

    WriteRef { value, modified: false, modify_scope, info: &self.info }
  }
}

impl<'w, S, F> IntoWidgetStrict<'w, RENDER> for SplittedWriter<S, F>
where
  Self: StateWriter<Value: Render + Sized> + 'w,
{
  fn into_widget_strict(self) -> Widget<'w> { WriterRender(self).into_widget() }
}

impl<S, F> IntoWidgetStrict<'static, COMPOSE> for SplittedWriter<S, F>
where
  Self: StateWriter + 'static,
  <Self as StateReader>::Value: Compose,
{
  fn into_widget_strict(self) -> Widget<'static> { Compose::compose(self) }
}