614 lines
18 KiB
Rust
614 lines
18 KiB
Rust
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//! Adaptive two-block bar that wraps its trailing block onto a second row when
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//! the width can't hold both blocks side by side. Used by the ribbon tab row
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//! (lead = quick-access + undo/redo, trail = tabs) and the status bar
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//! (lead = menu, trail = status pills, with the layout-tab strip as the Fill
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//! `middle` filler between them).
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//!
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//! Layout, per row:
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//! • one row → `lead` at the left; `trail` packed after it (`justify_end`
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//! false) or flush to the right edge (`justify_end` true);
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//! an optional Fill `middle` stretches through the gap.
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//! • two rows → `lead` (+ `middle` filling the rest) on row 1; `trail` on
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//! row 2, left- or right-aligned per `justify_end`.
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//!
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//! The measured total height is written to `height_out` (if set) so callers can
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//! anchor overlays below the possibly-taller bar.
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use std::sync::atomic::{AtomicU32, Ordering};
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use std::sync::Arc;
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use iced::advanced::layout::{self, Layout};
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use iced::advanced::widget::{self, Widget};
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use iced::advanced::{mouse, overlay, renderer, Clipboard, Shell};
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use iced::{Element, Event, Length, Point, Rectangle, Renderer, Size, Theme, Vector};
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use crate::app::Message;
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pub struct WrapBar<'a> {
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lead: Element<'a, Message>,
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/// Optional Fill filler occupying the gap between `lead` and `trail`.
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middle: Option<Element<'a, Message>>,
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trail: Element<'a, Message>,
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/// Gap between adjacent blocks on a shared row.
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spacing: f32,
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/// Minimum height of a single row.
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min_row_h: f32,
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/// When true, `trail` sits at the right edge (justified); otherwise it is
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/// packed immediately after `lead`.
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justify_end: bool,
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/// Receives the measured total height (bits of an `f32`).
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height_out: Option<Arc<AtomicU32>>,
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}
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impl<'a> WrapBar<'a> {
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pub fn new(lead: Element<'a, Message>, trail: Element<'a, Message>) -> Self {
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Self {
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lead,
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middle: None,
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trail,
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spacing: 0.0,
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min_row_h: 28.0,
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justify_end: false,
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height_out: None,
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}
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}
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pub fn spacing(mut self, spacing: f32) -> Self {
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self.spacing = spacing;
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self
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}
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pub fn min_row_h(mut self, h: f32) -> Self {
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self.min_row_h = h;
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self
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}
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pub fn justify_end(mut self, justify: bool) -> Self {
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self.justify_end = justify;
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self
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}
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pub fn middle(mut self, middle: Element<'a, Message>) -> Self {
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self.middle = Some(middle);
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self
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}
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pub fn report_height(mut self, out: Arc<AtomicU32>) -> Self {
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self.height_out = Some(out);
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self
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}
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/// Elements in row order: lead, [middle], trail.
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fn refs(&self) -> Vec<&Element<'a, Message>> {
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let mut v = Vec::with_capacity(3);
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v.push(&self.lead);
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if let Some(m) = &self.middle {
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v.push(m);
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}
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v.push(&self.trail);
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v
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}
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fn refs_mut(&mut self) -> Vec<&mut Element<'a, Message>> {
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let mut v = Vec::with_capacity(3);
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v.push(&mut self.lead);
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if let Some(m) = &mut self.middle {
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v.push(m);
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}
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v.push(&mut self.trail);
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v
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}
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}
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impl<'a> Widget<Message, Theme, Renderer> for WrapBar<'a> {
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fn children(&self) -> Vec<widget::Tree> {
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self.refs().iter().map(|e| widget::Tree::new(*e)).collect()
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}
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fn diff(&self, tree: &mut widget::Tree) {
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let refs: Vec<_> = self.refs().iter().map(|e| e.as_widget()).collect();
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tree.diff_children(&refs);
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}
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fn size(&self) -> Size<Length> {
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Size::new(Length::Fill, Length::Shrink)
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}
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fn layout(
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&mut self,
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tree: &mut widget::Tree,
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renderer: &Renderer,
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limits: &layout::Limits,
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) -> layout::Node {
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let max = limits.max();
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// Measure blocks at their natural (unwrapped) width so the fit decision
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// and one-row placement use true content widths. A flex-wrap `trail`
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// (WrapFlow) only wraps when it is later laid out with a bounded width.
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let natural =
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layout::Limits::new(Size::ZERO, Size::new(f32::INFINITY, f32::INFINITY));
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let has_middle = self.middle.is_some();
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let trail_idx = if has_middle { 2 } else { 1 };
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let mut lead_node =
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self.lead
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.as_widget_mut()
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.layout(&mut tree.children[0], renderer, &natural);
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let mut trail_node = self.trail.as_widget_mut().layout(
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&mut tree.children[trail_idx],
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renderer,
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&natural,
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);
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let mut lead_sz = lead_node.size();
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let mut trail_sz = trail_node.size();
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let width = if max.width.is_finite() {
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max.width
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} else {
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lead_sz.width + self.spacing + trail_sz.width
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};
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let fits = max.width.is_finite()
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&& lead_sz.width + self.spacing + trail_sz.width <= max.width;
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let row_h = lead_sz.height.max(trail_sz.height).max(self.min_row_h);
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let bounded = layout::Limits::new(Size::ZERO, Size::new(width, f32::INFINITY));
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let (lead_pos, trail_pos, middle_x, middle_gap, total_h);
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if fits {
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// One row: lead left, trail packed after it or flush right.
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let trail_x = if self.justify_end {
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(width - trail_sz.width).max(lead_sz.width + self.spacing)
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} else {
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lead_sz.width + self.spacing
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};
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lead_pos = Point::new(0.0, (row_h - lead_sz.height) / 2.0);
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trail_pos = Point::new(trail_x, (row_h - trail_sz.height) / 2.0);
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middle_x = lead_sz.width + self.spacing;
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middle_gap = (trail_x - self.spacing - middle_x).max(0.0);
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total_h = row_h;
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} else if has_middle {
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// 3-slot justified bar: lead on row 1, middle fills the rest of it,
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// trail (flex-wrap) drops onto the row(s) below.
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lead_pos = Point::new(0.0, (row_h - lead_sz.height) / 2.0);
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middle_x = lead_sz.width + self.spacing;
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middle_gap = (width - middle_x).max(0.0);
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trail_node = self.trail.as_widget_mut().layout(
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&mut tree.children[trail_idx],
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renderer,
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&bounded,
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);
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trail_sz = trail_node.size();
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trail_pos = Point::new(0.0, row_h);
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total_h = row_h + trail_sz.height;
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} else {
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// 2-slot dual-wrap: lead and trail each wrap within their OWN row
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// band, stacked so a wrapped lead item never lands on a trail row.
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lead_node =
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self.lead
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.as_widget_mut()
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.layout(&mut tree.children[0], renderer, &bounded);
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lead_sz = lead_node.size();
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let lead_h = lead_sz.height.max(self.min_row_h);
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trail_node = self.trail.as_widget_mut().layout(
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&mut tree.children[trail_idx],
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renderer,
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&bounded,
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);
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trail_sz = trail_node.size();
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let trail_h = trail_sz.height.max(self.min_row_h);
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lead_pos = Point::new(0.0, (lead_h - lead_sz.height) / 2.0);
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trail_pos = Point::new(0.0, lead_h + (trail_h - trail_sz.height) / 2.0);
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middle_x = 0.0;
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middle_gap = 0.0;
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total_h = lead_h + trail_h;
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}
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let mut children: Vec<layout::Node> = Vec::with_capacity(3);
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children.push(lead_node.move_to(lead_pos));
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if has_middle {
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let mid_limits =
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layout::Limits::new(Size::new(middle_gap, 0.0), Size::new(middle_gap, row_h));
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let mut mid_node = self.middle.as_mut().unwrap().as_widget_mut().layout(
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&mut tree.children[1],
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renderer,
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&mid_limits,
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);
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let mid_y = ((row_h - mid_node.size().height) / 2.0).max(0.0);
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mid_node = mid_node.move_to(Point::new(middle_x, mid_y));
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children.push(mid_node);
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}
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children.push(trail_node.move_to(trail_pos));
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if let Some(out) = &self.height_out {
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out.store(total_h.to_bits(), Ordering::Relaxed);
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}
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layout::Node::with_children(Size::new(width, total_h), children)
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}
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fn update(
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&mut self,
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tree: &mut widget::Tree,
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event: &Event,
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layout: Layout<'_>,
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cursor: mouse::Cursor,
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renderer: &Renderer,
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clipboard: &mut dyn Clipboard,
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shell: &mut Shell<'_, Message>,
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viewport: &Rectangle,
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) {
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for ((child, state), child_layout) in self
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.refs_mut()
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.into_iter()
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.zip(tree.children.iter_mut())
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.zip(layout.children())
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{
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child.as_widget_mut().update(
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state,
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event,
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child_layout,
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cursor,
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renderer,
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clipboard,
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shell,
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viewport,
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);
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}
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}
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fn mouse_interaction(
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&self,
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tree: &widget::Tree,
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layout: Layout<'_>,
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cursor: mouse::Cursor,
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viewport: &Rectangle,
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renderer: &Renderer,
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) -> mouse::Interaction {
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let mut interaction = mouse::Interaction::default();
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for ((child, state), child_layout) in self
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.refs()
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.into_iter()
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.zip(tree.children.iter())
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.zip(layout.children())
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{
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let i = child.as_widget().mouse_interaction(
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state,
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child_layout,
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cursor,
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viewport,
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renderer,
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);
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if i != mouse::Interaction::default() {
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interaction = i;
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}
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}
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interaction
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}
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fn operate(
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&mut self,
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tree: &mut widget::Tree,
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layout: Layout<'_>,
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renderer: &Renderer,
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operation: &mut dyn widget::Operation,
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) {
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for ((child, state), child_layout) in self
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.refs_mut()
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.into_iter()
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.zip(tree.children.iter_mut())
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.zip(layout.children())
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{
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child
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.as_widget_mut()
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.operate(state, child_layout, renderer, operation);
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}
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}
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fn draw(
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&self,
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tree: &widget::Tree,
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renderer: &mut Renderer,
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theme: &Theme,
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style: &renderer::Style,
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layout: Layout<'_>,
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cursor: mouse::Cursor,
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viewport: &Rectangle,
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) {
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for ((child, state), child_layout) in self
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.refs()
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.into_iter()
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.zip(tree.children.iter())
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.zip(layout.children())
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{
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child.as_widget().draw(
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state,
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renderer,
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theme,
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style,
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child_layout,
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cursor,
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viewport,
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);
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}
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}
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fn overlay<'b>(
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&'b mut self,
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tree: &'b mut widget::Tree,
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layout: Layout<'b>,
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renderer: &Renderer,
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viewport: &Rectangle,
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translation: Vector,
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) -> Option<overlay::Element<'b, Message, Theme, Renderer>> {
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|
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// At most one child (the hovered tooltip, if any) yields an overlay;
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// return the first. Borrow fields and tree slots disjointly so the
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// returned overlay can outlive this call.
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let layouts: Vec<Layout<'b>> = layout.children().collect();
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let has_middle = self.middle.is_some();
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// Split the tree children into disjoint mutable slots.
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let (lead_tree, rest) = tree.children.split_at_mut(1);
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if let Some(ll) = layouts.first() {
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if let Some(ov) = self.lead.as_widget_mut().overlay(
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&mut lead_tree[0],
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*ll,
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renderer,
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viewport,
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translation,
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) {
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return Some(ov);
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}
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}
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if has_middle {
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let (mid_tree, trail_tree) = rest.split_at_mut(1);
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|
|
if let (Some(m), Some(ml)) = (self.middle.as_mut(), layouts.get(1)) {
|
||
|
|
if let Some(ov) = m.as_widget_mut().overlay(
|
||
|
|
&mut mid_tree[0],
|
||
|
|
*ml,
|
||
|
|
renderer,
|
||
|
|
viewport,
|
||
|
|
translation,
|
||
|
|
) {
|
||
|
|
return Some(ov);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if let Some(tl) = layouts.get(2) {
|
||
|
|
return self.trail.as_widget_mut().overlay(
|
||
|
|
&mut trail_tree[0],
|
||
|
|
*tl,
|
||
|
|
renderer,
|
||
|
|
viewport,
|
||
|
|
translation,
|
||
|
|
);
|
||
|
|
}
|
||
|
|
} else if let Some(tl) = layouts.get(1) {
|
||
|
|
return self.trail.as_widget_mut().overlay(
|
||
|
|
&mut rest[0],
|
||
|
|
*tl,
|
||
|
|
renderer,
|
||
|
|
viewport,
|
||
|
|
translation,
|
||
|
|
);
|
||
|
|
}
|
||
|
|
None
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
impl<'a> From<WrapBar<'a>> for Element<'a, Message> {
|
||
|
|
fn from(w: WrapBar<'a>) -> Self {
|
||
|
|
Element::new(w)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/// Flex-wrap row: lays its items left-to-right and wraps onto a new row when
|
||
|
|
/// the next item would exceed the available width. Each row is `row_h` tall and
|
||
|
|
/// items are vertically centred. Used for the status-bar pills so they spread
|
||
|
|
/// across multiple rows when the width can't hold them on one line.
|
||
|
|
pub struct WrapFlow<'a> {
|
||
|
|
items: Vec<Element<'a, Message>>,
|
||
|
|
spacing_x: f32,
|
||
|
|
spacing_y: f32,
|
||
|
|
row_h: f32,
|
||
|
|
}
|
||
|
|
|
||
|
|
impl<'a> WrapFlow<'a> {
|
||
|
|
pub fn new(items: Vec<Element<'a, Message>>) -> Self {
|
||
|
|
Self {
|
||
|
|
items,
|
||
|
|
spacing_x: 2.0,
|
||
|
|
spacing_y: 0.0,
|
||
|
|
row_h: 28.0,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
pub fn spacing_x(mut self, s: f32) -> Self {
|
||
|
|
self.spacing_x = s;
|
||
|
|
self
|
||
|
|
}
|
||
|
|
|
||
|
|
pub fn row_h(mut self, h: f32) -> Self {
|
||
|
|
self.row_h = h;
|
||
|
|
self
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
impl<'a> Widget<Message, Theme, Renderer> for WrapFlow<'a> {
|
||
|
|
fn children(&self) -> Vec<widget::Tree> {
|
||
|
|
self.items.iter().map(widget::Tree::new).collect()
|
||
|
|
}
|
||
|
|
|
||
|
|
fn diff(&self, tree: &mut widget::Tree) {
|
||
|
|
let refs: Vec<_> = self.items.iter().map(|e| e.as_widget()).collect();
|
||
|
|
tree.diff_children(&refs);
|
||
|
|
}
|
||
|
|
|
||
|
|
fn size(&self) -> Size<Length> {
|
||
|
|
Size::new(Length::Shrink, Length::Shrink)
|
||
|
|
}
|
||
|
|
|
||
|
|
fn layout(
|
||
|
|
&mut self,
|
||
|
|
tree: &mut widget::Tree,
|
||
|
|
renderer: &Renderer,
|
||
|
|
limits: &layout::Limits,
|
||
|
|
) -> layout::Node {
|
||
|
|
let max_w = limits.max().width;
|
||
|
|
let natural =
|
||
|
|
layout::Limits::new(Size::ZERO, Size::new(f32::INFINITY, f32::INFINITY));
|
||
|
|
|
||
|
|
let mut nodes: Vec<layout::Node> = Vec::with_capacity(self.items.len());
|
||
|
|
let mut x = 0.0f32;
|
||
|
|
let mut y = 0.0f32;
|
||
|
|
let mut used_w = 0.0f32;
|
||
|
|
|
||
|
|
for (item, state) in self.items.iter_mut().zip(tree.children.iter_mut()) {
|
||
|
|
let node = item.as_widget_mut().layout(state, renderer, &natural);
|
||
|
|
let sz = node.size();
|
||
|
|
if x > 0.0 && x + sz.width > max_w {
|
||
|
|
x = 0.0;
|
||
|
|
y += self.row_h + self.spacing_y;
|
||
|
|
}
|
||
|
|
let cy = y + ((self.row_h - sz.height) / 2.0).max(0.0);
|
||
|
|
nodes.push(node.move_to(Point::new(x, cy)));
|
||
|
|
x += sz.width + self.spacing_x;
|
||
|
|
used_w = used_w.max(x - self.spacing_x);
|
||
|
|
}
|
||
|
|
|
||
|
|
let total_h = if self.items.is_empty() {
|
||
|
|
self.row_h
|
||
|
|
} else {
|
||
|
|
y + self.row_h
|
||
|
|
};
|
||
|
|
layout::Node::with_children(Size::new(used_w.max(0.0), total_h), nodes)
|
||
|
|
}
|
||
|
|
|
||
|
|
fn update(
|
||
|
|
&mut self,
|
||
|
|
tree: &mut widget::Tree,
|
||
|
|
event: &Event,
|
||
|
|
layout: Layout<'_>,
|
||
|
|
cursor: mouse::Cursor,
|
||
|
|
renderer: &Renderer,
|
||
|
|
clipboard: &mut dyn Clipboard,
|
||
|
|
shell: &mut Shell<'_, Message>,
|
||
|
|
viewport: &Rectangle,
|
||
|
|
) {
|
||
|
|
for ((item, state), child_layout) in self
|
||
|
|
.items
|
||
|
|
.iter_mut()
|
||
|
|
.zip(tree.children.iter_mut())
|
||
|
|
.zip(layout.children())
|
||
|
|
{
|
||
|
|
item.as_widget_mut().update(
|
||
|
|
state,
|
||
|
|
event,
|
||
|
|
child_layout,
|
||
|
|
cursor,
|
||
|
|
renderer,
|
||
|
|
clipboard,
|
||
|
|
shell,
|
||
|
|
viewport,
|
||
|
|
);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
fn mouse_interaction(
|
||
|
|
&self,
|
||
|
|
tree: &widget::Tree,
|
||
|
|
layout: Layout<'_>,
|
||
|
|
cursor: mouse::Cursor,
|
||
|
|
viewport: &Rectangle,
|
||
|
|
renderer: &Renderer,
|
||
|
|
) -> mouse::Interaction {
|
||
|
|
let mut interaction = mouse::Interaction::default();
|
||
|
|
for ((item, state), child_layout) in self
|
||
|
|
.items
|
||
|
|
.iter()
|
||
|
|
.zip(tree.children.iter())
|
||
|
|
.zip(layout.children())
|
||
|
|
{
|
||
|
|
let i = item.as_widget().mouse_interaction(
|
||
|
|
state,
|
||
|
|
child_layout,
|
||
|
|
cursor,
|
||
|
|
viewport,
|
||
|
|
renderer,
|
||
|
|
);
|
||
|
|
if i != mouse::Interaction::default() {
|
||
|
|
interaction = i;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
interaction
|
||
|
|
}
|
||
|
|
|
||
|
|
fn operate(
|
||
|
|
&mut self,
|
||
|
|
tree: &mut widget::Tree,
|
||
|
|
layout: Layout<'_>,
|
||
|
|
renderer: &Renderer,
|
||
|
|
operation: &mut dyn widget::Operation,
|
||
|
|
) {
|
||
|
|
for ((item, state), child_layout) in self
|
||
|
|
.items
|
||
|
|
.iter_mut()
|
||
|
|
.zip(tree.children.iter_mut())
|
||
|
|
.zip(layout.children())
|
||
|
|
{
|
||
|
|
item.as_widget_mut()
|
||
|
|
.operate(state, child_layout, renderer, operation);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
fn draw(
|
||
|
|
&self,
|
||
|
|
tree: &widget::Tree,
|
||
|
|
renderer: &mut Renderer,
|
||
|
|
theme: &Theme,
|
||
|
|
style: &renderer::Style,
|
||
|
|
layout: Layout<'_>,
|
||
|
|
cursor: mouse::Cursor,
|
||
|
|
viewport: &Rectangle,
|
||
|
|
) {
|
||
|
|
for ((item, state), child_layout) in self
|
||
|
|
.items
|
||
|
|
.iter()
|
||
|
|
.zip(tree.children.iter())
|
||
|
|
.zip(layout.children())
|
||
|
|
{
|
||
|
|
item.as_widget()
|
||
|
|
.draw(state, renderer, theme, style, child_layout, cursor, viewport);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
fn overlay<'b>(
|
||
|
|
&'b mut self,
|
||
|
|
tree: &'b mut widget::Tree,
|
||
|
|
layout: Layout<'b>,
|
||
|
|
renderer: &Renderer,
|
||
|
|
viewport: &Rectangle,
|
||
|
|
translation: Vector,
|
||
|
|
) -> Option<overlay::Element<'b, Message, Theme, Renderer>> {
|
||
|
|
overlay::from_children(
|
||
|
|
&mut self.items,
|
||
|
|
tree,
|
||
|
|
layout,
|
||
|
|
renderer,
|
||
|
|
viewport,
|
||
|
|
translation,
|
||
|
|
)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
impl<'a> From<WrapFlow<'a>> for Element<'a, Message> {
|
||
|
|
fn from(w: WrapFlow<'a>) -> Self {
|
||
|
|
Element::new(w)
|
||
|
|
}
|
||
|
|
}
|