From 6798cf215f0e2ad448c03fe1164a21d54a4ce285 Mon Sep 17 00:00:00 2001
From: luoxiao <luoxiaozero@163.com>
Date: Thu, 9 Nov 2023 23:11:30 +0800
Subject: [PATCH] feat: binder

---
 src/components/binder.rs | 103 +++++++++++++++++++++++++++++++++++++++
 src/components/mod.rs    |   1 +
 src/loading_bar/mod.rs   |   6 +--
 3 files changed, 107 insertions(+), 3 deletions(-)
 create mode 100644 src/components/binder.rs

diff --git a/src/components/binder.rs b/src/components/binder.rs
new file mode 100644
index 0000000..456ac06
--- /dev/null
+++ b/src/components/binder.rs
@@ -0,0 +1,103 @@
+use crate::teleport::Teleport;
+use leptos::{
+    html::{AnyElement, ToHtmlElement},
+    *,
+};
+
+#[slot]
+pub struct Follower {
+    show: MaybeSignal<bool>,
+    children: Children,
+}
+
+#[component]
+pub fn Binder(
+    target: NodeRef<AnyElement>,
+    follower: Follower,
+    children: Children,
+) -> impl IntoView {
+    let scrollable_element_vec = store_value::<Vec<HtmlElement<AnyElement>>>(vec![]);
+    let ensure_scroll_listener = move || {
+        let mut cursor = target.get_untracked();
+        loop {
+            cursor = get_scroll_parent(cursor);
+            if let Some(cursor) = cursor.take() {
+                scrollable_element_vec.update_value(|vec| vec.push(cursor));
+            } else {
+                break;
+            }
+        }
+        scrollable_element_vec.with_value(|vec| {
+            vec.iter().for_each(|ele| {
+                _ = ele.clone().on(ev::scroll, move |_| {});
+            })
+        });
+    };
+
+    view! {
+        {children()}
+        <Teleport>
+            <div class="thaw-binder-follower-container">
+                <div class="thaw-binder-follower-content">
+                    {(follower.children)()}
+                </div>
+            </div>
+        </Teleport>
+    }
+}
+
+fn get_scroll_parent(element: Option<HtmlElement<AnyElement>>) -> Option<HtmlElement<AnyElement>> {
+    let Some(element) = element else {
+        return None;
+    };
+
+    fn get_parent_element(element: HtmlElement<AnyElement>) -> Option<HtmlElement<AnyElement>> {
+        if element.node_type() == 9 {
+            None
+        } else {
+            element.parent_element().map(|ele| ele.to_leptos_element())
+        }
+    }
+    let Some(parent_element) = get_parent_element(element) else {
+        return None;
+    };
+
+    if parent_element.node_type() == 9 {
+        return Some(parent_element);
+    }
+
+    if parent_element.node_type() == 1 {
+        fn get_overflow(
+            parent_element: &HtmlElement<AnyElement>,
+        ) -> Option<(String, String, String)> {
+            let Ok(Some(css_style_declaration)) = window().get_computed_style(parent_element)
+            else {
+                return None;
+            };
+            let Ok(overflow) = css_style_declaration.get_property_value("overflow") else {
+                return None;
+            };
+            let Ok(overflow_x) = css_style_declaration.get_property_value("overflowX") else {
+                return None;
+            };
+            let Ok(overflow_y) = css_style_declaration.get_property_value("overflowY") else {
+                return None;
+            };
+            Some((overflow, overflow_x, overflow_y))
+        }
+        if let Some((overflow, overflow_x, overflow_y)) = get_overflow(&parent_element) {
+            let overflow = format!("{overflow}{overflow_x}{overflow_y}");
+            if overflow.contains("auto") {
+                return Some(parent_element);
+            }
+            if overflow.contains("scroll") {
+                return Some(parent_element);
+            }
+            if overflow.contains("overlay") {
+                return Some(parent_element);
+            }
+        }
+    }
+
+    get_scroll_parent(Some(parent_element))
+}
diff --git a/src/components/mod.rs b/src/components/mod.rs
index 4f92fcf..e0d6b10 100644
--- a/src/components/mod.rs
+++ b/src/components/mod.rs
@@ -1,3 +1,4 @@
+mod binder;
 mod if_comp;
 mod option_comp;
 
diff --git a/src/loading_bar/mod.rs b/src/loading_bar/mod.rs
index 3db30ec..d205a93 100644
--- a/src/loading_bar/mod.rs
+++ b/src/loading_bar/mod.rs
@@ -52,7 +52,7 @@ pub(crate) fn LoadingBar(#[prop(optional)] comp_ref: ComponentRef<LoadingBarRef>
                 .style("transition", "none")
                 .style("max-width", "0");
             _ = loading_bar_ref.offset_width();
-            loading_bar_ref
+            _ = loading_bar_ref
                 .style("transition", "max-width 4s linear")
                 .style("max-width", "80%");
         }
@@ -66,7 +66,7 @@ pub(crate) fn LoadingBar(#[prop(optional)] comp_ref: ComponentRef<LoadingBarRef>
     };
     let finish = Callback::new(move |_| {
         if let Some(loading_bar_ref) = loading_bar_ref.get_untracked() {
-            loading_bar_ref
+            _ = loading_bar_ref
                 .style("background-color", "var(--thaw-background-color)")
                 .style("transition", "max-width 0.5s linear")
                 .style("max-width", "100%");
@@ -83,7 +83,7 @@ pub(crate) fn LoadingBar(#[prop(optional)] comp_ref: ComponentRef<LoadingBarRef>
                     .style("max-width", "0");
                 _ = loading_bar_ref.offset_width();
             }
-            loading_bar_ref
+            _ = loading_bar_ref
                 .style("background-color", "var(--thaw-background-color-error)")
                 .style("transition", "max-width 0.5s linear")
                 .style("max-width", "100%");