autocommit 2022-01-25 16:45:44 CET

src/tree/container.rs

@@ -0,0 +1,347 @@
+use crate::rect::Rect;
+use crate::render::{Border, Renderer};
+use crate::tree::{FoundNode, Node, NodeId, WorkspaceNode};
+use crate::utils::clonecell::CloneCell;
+use crate::utils::linkedlist::{LinkedList, LinkedNode, NodeRef};
+use crate::{NumCell, State};
+use ahash::AHashMap;
+use std::cell::{Cell, RefCell};
+use std::rc::Rc;
+
+#[allow(dead_code)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq)]
+pub enum ContainerSplit {
+    Horizontal,
+    Vertical,
+}
+
+#[allow(dead_code)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq)]
+pub enum ContainerFocus {
+    None,
+    Child,
+    Yes,
+}
+
+tree_id!(ContainerNodeId);
+
+pub const CONTAINER_TITLE_HEIGHT: i32 = 18;
+pub const CONTAINER_BORDER: i32 = 2;
+
+pub struct ContainerNode {
+    pub id: ContainerNodeId,
+    pub parent: CloneCell<Rc<dyn Node>>,
+    pub split: Cell<ContainerSplit>,
+    pub mono_child: CloneCell<Option<NodeRef<ContainerChild>>>,
+    pub mono_body: Cell<Rect>,
+    pub mono_content: Cell<Rect>,
+    pub width: Cell<i32>,
+    pub height: Cell<i32>,
+    pub content_width: Cell<i32>,
+    pub content_height: Cell<i32>,
+    pub borders: Cell<Border>,
+    num_children: NumCell<usize>,
+    pub children: LinkedList<ContainerChild>,
+    child_nodes: RefCell<AHashMap<NodeId, LinkedNode<ContainerChild>>>,
+}
+
+pub struct ContainerChild {
+    pub node: Rc<dyn Node>,
+    pub body: Cell<Rect>,
+    pub content: Cell<Rect>,
+    factor: Cell<f64>,
+    pub focus: Cell<ContainerFocus>,
+}
+
+impl ContainerChild {
+    fn position_content(&self) {
+        let mut content = self.content.get();
+        let body = self.body.get();
+        let width = content.width();
+        let height = content.height();
+        let x1 = body.x1() + (body.width() - width) / 2;
+        let y1 = body.y1() + (body.height() - height) / 2;
+        content = Rect::new_sized(x1, y1, width, height).unwrap();
+        log::debug!("body: {:?}", body);
+        log::debug!("content: {:?}", content);
+        self.content.set(content);
+    }
+}
+
+impl ContainerNode {
+    pub fn new(state: &State, parent: Rc<dyn Node>, child: Rc<dyn Node>) -> Self {
+        let children = LinkedList::new();
+        let mut child_nodes = AHashMap::new();
+        child_nodes.insert(
+            child.id(),
+            children.add_last(ContainerChild {
+                node: child,
+                body: Cell::new(Default::default()),
+                content: Cell::new(Default::default()),
+                factor: Cell::new(1.0),
+                focus: Cell::new(ContainerFocus::None),
+            }),
+        );
+        Self {
+            id: state.node_ids.next(),
+            parent: CloneCell::new(parent),
+            split: Cell::new(ContainerSplit::Horizontal),
+            mono_child: CloneCell::new(None),
+            mono_body: Cell::new(Default::default()),
+            mono_content: Cell::new(Default::default()),
+            width: Cell::new(0),
+            height: Cell::new(0),
+            content_width: Cell::new(0),
+            content_height: Cell::new(0),
+            borders: Cell::new(Border::NONE),
+            num_children: NumCell::new(1),
+            children,
+            child_nodes: RefCell::new(child_nodes),
+        }
+    }
+
+    pub fn num_children(&self) -> usize {
+        self.num_children.get()
+    }
+
+    pub fn append_child(self: &Rc<Self>, new: Rc<dyn Node>) {
+        if let Some(child) = self.children.last() {
+            self.add_child_after_(&child, new);
+            return;
+        }
+        log::error!("Tried to add a child to a container but container is empty");
+    }
+
+    pub fn add_child_after(self: &Rc<Self>, prev: &dyn Node, new: Rc<dyn Node>) {
+        let node = self.child_nodes.borrow().get(&prev.id()).map(|n| n.to_ref());
+        if let Some(node) = node {
+            self.add_child_after_(&node, new);
+            return;
+        }
+        log::error!(
+            "Tried to add a child to a container but the preceding node is not in the container"
+        );
+    }
+
+    fn add_child_after_(self: &Rc<Self>, prev: &NodeRef<ContainerChild>, new: Rc<dyn Node>) {
+        {
+            let mut links = self.child_nodes.borrow_mut();
+            if links.contains_key(&new.id()) {
+                log::error!("Tried to add a child to a container that already contains the child");
+                return;
+            }
+            links.insert(
+                new.id(),
+                prev.append(ContainerChild {
+                    node: new.clone(),
+                    body: Default::default(),
+                    content: Default::default(),
+                    factor: Cell::new(0.0),
+                    focus: Cell::new(ContainerFocus::None),
+                }),
+            );
+        }
+        match self.split.get() {
+            ContainerSplit::Horizontal => {
+                let new_content_size = self.content_width.get().saturating_sub(CONTAINER_BORDER);
+                self.content_width.set(new_content_size);
+            }
+            ContainerSplit::Vertical => {
+                let new_content_size = self
+                    .content_height
+                    .get()
+                    .saturating_sub(CONTAINER_BORDER + CONTAINER_TITLE_HEIGHT);
+                self.content_height.set(new_content_size);
+            }
+        }
+        let num_children = self.num_children.fetch_add(1) + 1;
+        let new_child_factor = 1.0 / num_children as f64;
+        let mut sum_factors = 0.0;
+        for child in self.children.iter() {
+            let factor = if Rc::ptr_eq(&child.node, &new) {
+                new_child_factor
+            } else {
+                child.factor.get() * (1.0 - new_child_factor)
+            };
+            child.factor.set(factor);
+            sum_factors += factor;
+        }
+        self.apply_factors(sum_factors);
+    }
+
+    fn apply_factors(&self, sum_factors: f64) {
+        let split = self.split.get();
+        let (content_size, other_content_size) = match split {
+            ContainerSplit::Horizontal => (self.content_width.get(), self.content_height.get()),
+            ContainerSplit::Vertical => (self.content_height.get(), self.content_width.get()),
+        };
+        let num_children = self.num_children.get();
+        let mut pos = 0;
+        let mut remaining_content_size = content_size;
+        for child in self.children.iter() {
+            let factor = child.factor.get() / sum_factors;
+            child.factor.set(factor);
+            let mut body_size = (content_size as f64 * factor).round() as i32;
+            body_size = body_size.min(remaining_content_size);
+            remaining_content_size -= body_size;
+            let (x1, y1, width, height) = match split {
+                ContainerSplit::Horizontal => (pos, CONTAINER_TITLE_HEIGHT, body_size, other_content_size),
+                _ => (0, pos, other_content_size, body_size),
+            };
+            let body = Rect::new_sized(x1, y1, width, height).unwrap();
+            child.body.set(body);
+            pos += body_size + CONTAINER_BORDER;
+            if split == ContainerSplit::Vertical {
+                pos += body_size + CONTAINER_BORDER + CONTAINER_TITLE_HEIGHT;
+            }
+        }
+        if remaining_content_size > 0 {
+            let size_per = remaining_content_size / num_children as i32;
+            let mut rem = remaining_content_size % num_children as i32;
+            pos = 0;
+            for child in self.children.iter() {
+                let mut body = child.body.get();
+                let mut add = size_per;
+                if rem > 0 {
+                    rem -= 1;
+                    add += 1;
+                }
+                let (x1, y1, width, height, size) = match split {
+                    ContainerSplit::Horizontal => {
+                        let width = body.width() + add;
+                        (pos, CONTAINER_TITLE_HEIGHT, width, other_content_size, width)
+                    }
+                    _ => {
+                        let height = body.height() + add;
+                        (0, pos, other_content_size, height, height)
+                    }
+                };
+                body = Rect::new_sized(x1, y1, width, height).unwrap();
+                child.body.set(body);
+                pos += size + CONTAINER_BORDER;
+                if split == ContainerSplit::Vertical {
+                    pos += CONTAINER_TITLE_HEIGHT;
+                }
+            }
+        }
+        for child in self.children.iter() {
+            let body = child.body.get();
+            child.node.clone().change_size(body.width(), body.height());
+            child.position_content();
+        }
+    }
+}
+
+impl Node for ContainerNode {
+    fn id(&self) -> NodeId {
+        self.id.into()
+    }
+
+    fn clear(&self) {
+        let mut cn = self.child_nodes.borrow_mut();
+        for (_, n) in cn.drain() {
+            n.node.clear();
+        }
+    }
+
+    fn find_child_at(&self, x: i32, y: i32) -> Option<FoundNode> {
+        if let Some(child) = self.mono_child.get() {
+            if self.mono_body.get().contains(x, y) {
+                let content = self.mono_content.get();
+                let (x, y) = content.translate(x, y);
+                return Some(FoundNode {
+                    node: child.node.clone(),
+                    x,
+                    y,
+                    contained: content.contains(x, y),
+                });
+            }
+            return None;
+        }
+        for child in self.children.iter() {
+            if child.body.get().contains(x, y) {
+                let content = child.content.get();
+                let (x, y) = content.translate(x, y);
+                return Some(FoundNode {
+                    node: child.node.clone(),
+                    x,
+                    y,
+                    contained: content.contains(x, y),
+                });
+            }
+        }
+        None
+    }
+
+    fn remove_child(&self, child: &dyn Node) {
+        let node = match self.child_nodes.borrow_mut().remove(&child.id()) {
+            Some(c) => c.to_ref(),
+            None => return,
+        };
+        let num_children = self.num_children.fetch_sub(1) - 1;
+        if num_children == 0 {
+            self.parent.get().remove_child(self);
+            return;
+        }
+        let rem = 1.0 - node.factor.get();
+        let mut sum = 0.0;
+        if rem <= 0.0 {
+            let factor = 1.0 / num_children as f64;
+            for child in self.children.iter() {
+                child.factor.set(factor)
+            }
+            sum = 1.0;
+        } else {
+            for child in self.children.iter() {
+                let factor = child.factor.get() / rem;
+                child.factor.set(factor);
+                sum += factor;
+            }
+        }
+        self.apply_factors(sum);
+    }
+
+    fn child_size_changed(&self, child: &dyn Node, width: i32, height: i32) {
+        log::info!("child size changed {}x{}", width, height);
+        let cn = self.child_nodes.borrow();
+        if let Some(node) = cn.get(&child.id()) {
+            let rect = Rect::new(0, 0, width, height).unwrap();
+            node.content.set(rect);
+            node.position_content();
+        }
+    }
+
+    fn render(&self, renderer: &mut dyn Renderer, x: i32, y: i32) {
+        renderer.render_container(self, x, y);
+    }
+
+    fn into_container(self: Rc<Self>) -> Option<Rc<ContainerNode>> {
+        Some(self)
+    }
+
+    fn get_workspace(self: Rc<Self>) -> Option<Rc<WorkspaceNode>> {
+        self.parent.get().get_workspace()
+    }
+
+    fn change_size(self: Rc<Self>, width: i32, height: i32) {
+        self.width.set(width);
+        self.height.set(height);
+        let num_children = self.num_children.get();
+        match self.split.get() {
+            ContainerSplit::Horizontal => {
+                self.content_width
+                    .set(width.saturating_sub((num_children - 1) as i32 * CONTAINER_BORDER));
+                self.content_height
+                    .set(height.saturating_sub(CONTAINER_TITLE_HEIGHT));
+            }
+            ContainerSplit::Vertical => {
+                self.content_width.set(width);
+                self.content_height.set(height.saturating_sub(
+                    (num_children - 1) as i32 * CONTAINER_BORDER
+                        + num_children as i32 * CONTAINER_TITLE_HEIGHT,
+                ));
+            }
+        }
+        self.apply_factors(1.0);
+    }
+}