390 lines
11 KiB
Rust
390 lines
11 KiB
Rust
//! Dock is a fixed container that places at left, bottom, right of the Windows.
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use std::sync::Arc;
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use gpui::{
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div, prelude::FluentBuilder as _, px, Axis, Element, InteractiveElement as _, IntoElement,
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MouseMoveEvent, MouseUpEvent, ParentElement as _, Pixels, Point, Render,
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StatefulInteractiveElement, Style, Styled as _, View, ViewContext, VisualContext as _,
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WeakView, WindowContext,
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};
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use serde::{Deserialize, Serialize};
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use crate::{
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resizable::{HANDLE_PADDING, HANDLE_SIZE, PANEL_MIN_SIZE},
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theme::ActiveTheme as _,
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AxisExt as _, StyledExt,
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};
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use super::{DockArea, DockItem, PanelView, TabPanel};
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#[derive(Clone, Render)]
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struct ResizePanel;
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#[derive(Debug, Clone, Copy, Serialize, Deserialize, PartialEq, Eq)]
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pub enum DockPlacement {
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#[serde(rename = "center")]
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Center,
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#[serde(rename = "left")]
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Left,
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#[serde(rename = "bottom")]
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Bottom,
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#[serde(rename = "right")]
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Right,
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}
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impl DockPlacement {
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fn axis(&self) -> Axis {
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match self {
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Self::Left | Self::Right => Axis::Horizontal,
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Self::Bottom => Axis::Vertical,
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Self::Center => unreachable!(),
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}
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}
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pub fn is_left(&self) -> bool {
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matches!(self, Self::Left)
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}
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pub fn is_bottom(&self) -> bool {
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matches!(self, Self::Bottom)
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}
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pub fn is_right(&self) -> bool {
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matches!(self, Self::Right)
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}
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}
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/// The Dock is a fixed container that places at left, bottom, right of the Windows.
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///
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/// This is unlike Panel, it can't be move or add any other panel.
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pub struct Dock {
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pub(super) placement: DockPlacement,
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dock_area: WeakView<DockArea>,
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pub(crate) panel: DockItem,
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/// The size is means the width or height of the Dock, if the placement is left or right, the size is width, otherwise the size is height.
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pub(super) size: Pixels,
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pub(super) open: bool,
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is_resizing: bool,
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}
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impl Dock {
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pub(crate) fn new(
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dock_area: WeakView<DockArea>,
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placement: DockPlacement,
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cx: &mut ViewContext<Self>,
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) -> Self {
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let panel = cx.new_view(|cx| {
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let mut tab = TabPanel::new(None, dock_area.clone(), cx);
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tab.closeable = false;
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tab
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});
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let panel = DockItem::Tabs {
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items: Vec::new(),
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active_ix: 0,
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view: panel.clone(),
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};
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Self::subscribe_panel_events(dock_area.clone(), &panel, cx);
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Self {
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placement,
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dock_area,
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panel,
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open: true,
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size: px(200.0),
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is_resizing: false,
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}
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}
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pub fn left(dock_area: WeakView<DockArea>, cx: &mut ViewContext<Self>) -> Self {
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Self::new(dock_area, DockPlacement::Left, cx)
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}
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pub fn bottom(dock_area: WeakView<DockArea>, cx: &mut ViewContext<Self>) -> Self {
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Self::new(dock_area, DockPlacement::Bottom, cx)
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}
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pub fn right(dock_area: WeakView<DockArea>, cx: &mut ViewContext<Self>) -> Self {
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Self::new(dock_area, DockPlacement::Right, cx)
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}
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pub(super) fn from_state(
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dock_area: WeakView<DockArea>,
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placement: DockPlacement,
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size: Pixels,
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panel: DockItem,
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open: bool,
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cx: &mut WindowContext,
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) -> Self {
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Self::subscribe_panel_events(dock_area.clone(), &panel, cx);
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if !open {
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match panel.clone() {
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DockItem::Tabs { view, .. } => {
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view.update(cx, |panel, cx| {
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panel.set_collapsed(true, cx);
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});
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}
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_ => {}
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}
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}
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Self {
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placement,
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dock_area,
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panel,
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open,
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size,
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is_resizing: false,
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}
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}
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fn subscribe_panel_events(
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dock_area: WeakView<DockArea>,
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panel: &DockItem,
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cx: &mut WindowContext,
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) {
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match panel {
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DockItem::Tabs { view, .. } => {
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cx.defer({
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let view = view.clone();
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move |cx| {
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_ = dock_area.update(cx, |this, cx| {
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this.subscribe_panel(&view, cx);
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});
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}
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});
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}
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DockItem::Split { items, view, .. } => {
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for item in items {
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Self::subscribe_panel_events(dock_area.clone(), item, cx);
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}
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cx.defer({
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let view = view.clone();
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move |cx| {
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_ = dock_area.update(cx, |this, cx| {
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this.subscribe_panel(&view, cx);
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});
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}
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});
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}
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}
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}
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pub fn set_panel(&mut self, panel: DockItem, cx: &mut ViewContext<Self>) {
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self.panel = panel;
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cx.notify();
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}
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pub fn is_open(&self) -> bool {
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self.open
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}
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pub fn toggle_open(&mut self, cx: &mut ViewContext<Self>) {
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self.set_open(!self.open, cx);
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}
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/// Returns the size of the Dock, the size is means the width or height of
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/// the Dock, if the placement is left or right, the size is width,
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/// otherwise the size is height.
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pub fn size(&self) -> Pixels {
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self.size
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}
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/// Set the size of the Dock.
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pub fn set_size(&mut self, size: Pixels, cx: &mut ViewContext<Self>) {
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self.size = size.max(PANEL_MIN_SIZE);
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cx.notify();
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}
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/// Set the open state of the Dock.
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pub fn set_open(&mut self, open: bool, cx: &mut ViewContext<Self>) {
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self.open = open;
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let item = self.panel.clone();
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cx.defer(move |_, cx| {
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item.set_collapsed(!open, cx);
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});
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cx.notify();
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}
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/// Add item to the Dock.
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pub fn add_panel(&mut self, panel: Arc<dyn PanelView>, cx: &mut ViewContext<Self>) {
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self.panel.add_panel(panel, &self.dock_area, cx);
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cx.notify();
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}
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fn render_resize_handle(&mut self, cx: &mut ViewContext<Self>) -> impl IntoElement {
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let axis = self.placement.axis();
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let neg_offset = -HANDLE_PADDING;
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let view = cx.view().clone();
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div()
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.id("resize-handle")
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.occlude()
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.absolute()
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.flex_shrink_0()
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.when(self.placement.is_left(), |this| {
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// FIXME: Improve this to let the scroll bar have px(HANDLE_PADDING)
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this.cursor_col_resize()
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.top_0()
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.right(px(1.))
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.h_full()
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.w(HANDLE_SIZE)
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.pl(HANDLE_PADDING)
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})
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.when(self.placement.is_right(), |this| {
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this.cursor_col_resize()
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.top_0()
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.left(neg_offset)
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.h_full()
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.w(HANDLE_SIZE)
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.px(HANDLE_PADDING)
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})
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.when(self.placement.is_bottom(), |this| {
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this.cursor_row_resize()
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.top(neg_offset)
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.left_0()
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.w_full()
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.h(HANDLE_SIZE)
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.py(HANDLE_PADDING)
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})
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.child(
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div()
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.bg(cx.theme().border)
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.when(axis.is_horizontal(), |this| this.h_full().w(HANDLE_SIZE))
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.when(axis.is_vertical(), |this| this.w_full().h(HANDLE_SIZE)),
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)
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.on_drag(ResizePanel {}, move |info, _, cx| {
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cx.stop_propagation();
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view.update(cx, |view, _| {
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view.is_resizing = true;
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});
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cx.new_view(|_| info.clone())
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})
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}
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fn resize(&mut self, mouse_position: Point<Pixels>, cx: &mut ViewContext<Self>) {
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if !self.is_resizing {
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return;
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}
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let area_bounds = self
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.dock_area
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.upgrade()
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.expect("DockArea is missing")
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.read(cx)
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.bounds;
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let size = match self.placement {
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DockPlacement::Left => mouse_position.x - area_bounds.left(),
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DockPlacement::Right => area_bounds.right() - mouse_position.x,
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DockPlacement::Bottom => area_bounds.bottom() - mouse_position.y,
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DockPlacement::Center => unreachable!(),
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};
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self.size = size.max(PANEL_MIN_SIZE);
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cx.notify();
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}
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fn done_resizing(&mut self, _: &mut ViewContext<Self>) {
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self.is_resizing = false;
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}
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}
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impl Render for Dock {
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fn render(&mut self, cx: &mut ViewContext<Self>) -> impl gpui::IntoElement {
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if !self.open && !self.placement.is_bottom() {
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return div();
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}
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div()
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.relative()
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.overflow_hidden()
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.map(|this| match self.placement {
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DockPlacement::Left | DockPlacement::Right => this.h_flex().h_full().w(self.size),
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DockPlacement::Bottom => this.w_full().h(self.size),
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DockPlacement::Center => unreachable!(),
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})
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// Bottom Dock should keep the title bar, then user can click the Toggle button
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.when(!self.open && self.placement.is_bottom(), |this| {
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this.h(px(29.))
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})
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.map(|this| match &self.panel {
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DockItem::Split { view, .. } => this.child(view.clone()),
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DockItem::Tabs { view, .. } => this.child(view.clone()),
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})
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.child(self.render_resize_handle(cx))
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.child(DockElement {
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view: cx.view().clone(),
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})
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}
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}
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struct DockElement {
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view: View<Dock>,
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}
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impl IntoElement for DockElement {
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type Element = Self;
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fn into_element(self) -> Self::Element {
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self
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}
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}
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impl Element for DockElement {
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type RequestLayoutState = ();
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type PrepaintState = ();
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fn id(&self) -> Option<gpui::ElementId> {
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None
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}
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fn request_layout(
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&mut self,
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_: Option<&gpui::GlobalElementId>,
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cx: &mut gpui::WindowContext,
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) -> (gpui::LayoutId, Self::RequestLayoutState) {
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(cx.request_layout(Style::default(), None), ())
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}
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fn prepaint(
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&mut self,
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_: Option<&gpui::GlobalElementId>,
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_: gpui::Bounds<Pixels>,
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_: &mut Self::RequestLayoutState,
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_: &mut gpui::WindowContext,
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) -> Self::PrepaintState {
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()
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}
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fn paint(
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&mut self,
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_: Option<&gpui::GlobalElementId>,
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_: gpui::Bounds<Pixels>,
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_: &mut Self::RequestLayoutState,
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_: &mut Self::PrepaintState,
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cx: &mut gpui::WindowContext,
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) {
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cx.on_mouse_event({
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let view = self.view.clone();
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move |e: &MouseMoveEvent, phase, cx| {
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if phase.bubble() {
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view.update(cx, |view, cx| view.resize(e.position, cx))
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}
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}
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});
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// When any mouse up, stop dragging
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cx.on_mouse_event({
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let view = self.view.clone();
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move |_: &MouseUpEvent, phase, cx| {
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if phase.bubble() {
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view.update(cx, |view, cx| view.done_resizing(cx));
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}
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}
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})
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}
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}
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