add node dependancy

packages/native-core/src/node_ref.rs

@@ -0,0 +1,212 @@
+use dioxus_core::*;
+
+use crate::state::union_ordered_iter;
+
+#[derive(Debug)]
+pub struct NodeView<'a> {
+    inner: &'a VNode<'a>,
+    mask: NodeMask,
+}
+impl<'a> NodeView<'a> {
+    pub fn new(mut vnode: &'a VNode<'a>, view: NodeMask, vdom: &'a VirtualDom) -> Self {
+        if let VNode::Component(sc) = vnode {
+            let scope = vdom.get_scope(sc.scope.get().unwrap()).unwrap();
+            vnode = scope.root_node();
+        }
+        Self {
+            inner: vnode,
+            mask: view,
+        }
+    }
+
+    pub fn id(&self) -> ElementId {
+        self.inner.mounted_id()
+    }
+
+    pub fn tag(&self) -> Option<&'a str> {
+        self.mask.tag.then(|| self.el().map(|el| el.tag)).flatten()
+    }
+
+    pub fn namespace(&self) -> Option<&'a str> {
+        self.mask
+            .namespace
+            .then(|| self.el().map(|el| el.namespace).flatten())
+            .flatten()
+    }
+
+    pub fn attributes(&self) -> impl Iterator<Item = &Attribute<'a>> {
+        self.el()
+            .map(|el| el.attributes)
+            .unwrap_or_default()
+            .iter()
+            .filter(|a| self.mask.attritutes.contains_attribute(&a.name))
+    }
+
+    pub fn text(&self) -> Option<&str> {
+        self.mask
+            .text
+            .then(|| self.txt().map(|txt| txt.text))
+            .flatten()
+    }
+
+    fn el(&self) -> Option<&'a VElement<'a>> {
+        if let VNode::Element(el) = &self.inner {
+            Some(el)
+        } else {
+            None
+        }
+    }
+
+    fn txt(&self) -> Option<&'a VText<'a>> {
+        if let VNode::Text(txt) = &self.inner {
+            Some(txt)
+        } else {
+            None
+        }
+    }
+}
+
+#[derive(PartialEq, Clone, Debug)]
+pub enum AttributeMask {
+    All,
+    Dynamic(Vec<&'static str>),
+    Static(&'static [&'static str]),
+}
+
+impl AttributeMask {
+    pub const NONE: Self = Self::Static(&[]);
+
+    fn contains_attribute(&self, attr: &'static str) -> bool {
+        match self {
+            AttributeMask::All => true,
+            AttributeMask::Dynamic(l) => l.binary_search(&attr).is_ok(),
+            AttributeMask::Static(l) => l.binary_search(&attr).is_ok(),
+        }
+    }
+
+    pub fn single(new: &'static str) -> Self {
+        Self::Dynamic(vec![new])
+    }
+
+    pub fn verify(&self) {
+        match &self {
+            AttributeMask::Static(attrs) => debug_assert!(
+                attrs.windows(2).all(|w| w[0] < w[1]),
+                "attritutes must be increasing"
+            ),
+            AttributeMask::Dynamic(attrs) => debug_assert!(
+                attrs.windows(2).all(|w| w[0] < w[1]),
+                "attritutes must be increasing"
+            ),
+            _ => (),
+        }
+    }
+
+    pub fn union(&self, other: &Self) -> Self {
+        let new = match (self, other) {
+            (AttributeMask::Dynamic(s), AttributeMask::Dynamic(o)) => AttributeMask::Dynamic(
+                union_ordered_iter(s.iter().copied(), o.iter().copied(), s.len() + o.len()),
+            ),
+            (AttributeMask::Static(s), AttributeMask::Dynamic(o)) => AttributeMask::Dynamic(
+                union_ordered_iter(s.iter().copied(), o.iter().copied(), s.len() + o.len()),
+            ),
+            (AttributeMask::Dynamic(s), AttributeMask::Static(o)) => AttributeMask::Dynamic(
+                union_ordered_iter(s.iter().copied(), o.iter().copied(), s.len() + o.len()),
+            ),
+            (AttributeMask::Static(s), AttributeMask::Static(o)) => AttributeMask::Dynamic(
+                union_ordered_iter(s.iter().copied(), o.iter().copied(), s.len() + o.len()),
+            ),
+            _ => AttributeMask::All,
+        };
+        new.verify();
+        new
+    }
+
+    fn overlaps(&self, other: &Self) -> bool {
+        fn overlaps_iter(
+            mut self_iter: impl Iterator<Item = &'static str>,
+            mut other_iter: impl Iterator<Item = &'static str>,
+        ) -> bool {
+            if let Some(mut other_attr) = other_iter.next() {
+                while let Some(self_attr) = self_iter.next() {
+                    while other_attr < self_attr {
+                        if let Some(attr) = other_iter.next() {
+                            other_attr = attr;
+                        } else {
+                            return false;
+                        }
+                    }
+                    if other_attr == self_attr {
+                        return true;
+                    }
+                }
+            }
+            false
+        }
+        match (self, other) {
+            (AttributeMask::All, AttributeMask::All) => true,
+            (AttributeMask::All, AttributeMask::Dynamic(v)) => !v.is_empty(),
+            (AttributeMask::All, AttributeMask::Static(s)) => !s.is_empty(),
+            (AttributeMask::Dynamic(v), AttributeMask::All) => !v.is_empty(),
+            (AttributeMask::Static(s), AttributeMask::All) => !s.is_empty(),
+            (AttributeMask::Dynamic(v1), AttributeMask::Dynamic(v2)) => {
+                overlaps_iter(v1.iter().copied(), v2.iter().copied())
+            }
+            (AttributeMask::Dynamic(v), AttributeMask::Static(s)) => {
+                overlaps_iter(v.iter().copied(), s.iter().copied())
+            }
+            (AttributeMask::Static(s), AttributeMask::Dynamic(v)) => {
+                overlaps_iter(v.iter().copied(), s.iter().copied())
+            }
+            (AttributeMask::Static(s1), AttributeMask::Static(s2)) => {
+                overlaps_iter(s1.iter().copied(), s2.iter().copied())
+            }
+        }
+    }
+}
+
+impl Default for AttributeMask {
+    fn default() -> Self {
+        AttributeMask::Static(&[])
+    }
+}
+
+#[derive(Default, PartialEq, Clone, Debug)]
+pub struct NodeMask {
+    // must be sorted
+    attritutes: AttributeMask,
+    tag: bool,
+    namespace: bool,
+    text: bool,
+}
+
+impl NodeMask {
+    pub const NONE: Self = Self::new(AttributeMask::Static(&[]), false, false, false);
+    pub const ALL: Self = Self::new(AttributeMask::All, true, true, true);
+
+    /// attritutes must be sorted!
+    pub const fn new(attritutes: AttributeMask, tag: bool, namespace: bool, text: bool) -> Self {
+        Self {
+            attritutes,
+            tag,
+            namespace,
+            text,
+        }
+    }
+
+    pub fn overlaps(&self, other: &Self) -> bool {
+        (self.tag && other.tag)
+            || (self.namespace && other.namespace)
+            || self.attritutes.overlaps(&other.attritutes)
+            || (self.text && other.text)
+    }
+
+    pub fn union(&self, other: &Self) -> Self {
+        Self {
+            attritutes: self.attritutes.union(&other.attritutes),
+            tag: self.tag | other.tag,
+            namespace: self.namespace | other.namespace,
+            text: self.text | other.text,
+        }
+    }
+}