488 lines
15 KiB
Rust
488 lines
15 KiB
Rust
// Copyright 2022 System76 <info@system76.com>
|
|
// SPDX-License-Identifier: MPL-2.0
|
|
|
|
use crate::cosmic_theme::{Density, Spacing};
|
|
use crate::{Element, theme, widget};
|
|
use apply::Apply;
|
|
use derive_setters::Setters;
|
|
use iced_core::{Length, Size, Vector, Widget, layout, text, widget::tree};
|
|
use std::borrow::Cow;
|
|
|
|
#[must_use]
|
|
pub fn header_bar<'a, Message>() -> HeaderBar<'a, Message> {
|
|
HeaderBar {
|
|
title: Cow::Borrowed(""),
|
|
on_close: None,
|
|
on_drag: None,
|
|
on_maximize: None,
|
|
on_minimize: None,
|
|
on_right_click: None,
|
|
start: Vec::new(),
|
|
center: Vec::new(),
|
|
end: Vec::new(),
|
|
density: None,
|
|
focused: false,
|
|
maximized: false,
|
|
sharp_corners: false,
|
|
is_ssd: false,
|
|
on_double_click: None,
|
|
}
|
|
}
|
|
|
|
#[derive(Setters)]
|
|
pub struct HeaderBar<'a, Message> {
|
|
/// Defines the title of the window
|
|
#[setters(skip)]
|
|
title: Cow<'a, str>,
|
|
|
|
/// A message emitted when the close button is pressed.
|
|
#[setters(strip_option)]
|
|
on_close: Option<Message>,
|
|
|
|
/// A message emitted when dragged.
|
|
#[setters(strip_option)]
|
|
on_drag: Option<Message>,
|
|
|
|
/// A message emitted when the maximize button is pressed.
|
|
#[setters(strip_option)]
|
|
on_maximize: Option<Message>,
|
|
|
|
/// A message emitted when the minimize button is pressed.
|
|
#[setters(strip_option)]
|
|
on_minimize: Option<Message>,
|
|
|
|
/// A message emitted when the header is double clicked,
|
|
/// usually used to maximize the window.
|
|
#[setters(strip_option)]
|
|
on_double_click: Option<Message>,
|
|
|
|
/// A message emitted when the header is right clicked.
|
|
#[setters(strip_option)]
|
|
on_right_click: Option<Message>,
|
|
|
|
/// Elements packed at the start of the headerbar.
|
|
#[setters(skip)]
|
|
start: Vec<Element<'a, Message>>,
|
|
|
|
/// Elements packed in the center of the headerbar.
|
|
#[setters(skip)]
|
|
center: Vec<Element<'a, Message>>,
|
|
|
|
/// Elements packed at the end of the headerbar.
|
|
#[setters(skip)]
|
|
end: Vec<Element<'a, Message>>,
|
|
|
|
/// Controls the density of the headerbar.
|
|
#[setters(strip_option)]
|
|
density: Option<Density>,
|
|
|
|
/// Focused state of the window
|
|
focused: bool,
|
|
|
|
/// Maximized state of the window
|
|
maximized: bool,
|
|
|
|
/// Whether the corners of the window should be sharp
|
|
sharp_corners: bool,
|
|
|
|
/// HeaderBar used for server-side decorations
|
|
is_ssd: bool,
|
|
}
|
|
|
|
impl<'a, Message: Clone + 'static> HeaderBar<'a, Message> {
|
|
/// Defines the title of the window
|
|
#[must_use]
|
|
pub fn title(mut self, title: impl Into<Cow<'a, str>> + 'a) -> Self {
|
|
self.title = title.into();
|
|
self
|
|
}
|
|
|
|
/// Pushes an element to the start region.
|
|
#[must_use]
|
|
pub fn start(mut self, widget: impl Into<Element<'a, Message>> + 'a) -> Self {
|
|
self.start.push(widget.into());
|
|
self
|
|
}
|
|
|
|
/// Pushes an element to the center region.
|
|
#[must_use]
|
|
pub fn center(mut self, widget: impl Into<Element<'a, Message>> + 'a) -> Self {
|
|
self.center.push(widget.into());
|
|
self
|
|
}
|
|
|
|
/// Pushes an element to the end region.
|
|
#[must_use]
|
|
pub fn end(mut self, widget: impl Into<Element<'a, Message>> + 'a) -> Self {
|
|
self.end.push(widget.into());
|
|
self
|
|
}
|
|
}
|
|
|
|
pub struct HeaderBarWidget<'a, Message> {
|
|
start: Element<'a, Message>,
|
|
center: Option<Element<'a, Message>>,
|
|
end: Element<'a, Message>,
|
|
}
|
|
|
|
impl<'a, Message> HeaderBarWidget<'a, Message> {
|
|
pub fn new(
|
|
start: Element<'a, Message>,
|
|
center: Option<Element<'a, Message>>,
|
|
end: Element<'a, Message>,
|
|
) -> Self {
|
|
Self { start, center, end }
|
|
}
|
|
|
|
fn elems(&self) -> impl Iterator<Item = &Element<'a, Message>> {
|
|
std::iter::once(&self.start)
|
|
.chain(std::iter::once(&self.end))
|
|
.chain(self.center.as_ref())
|
|
}
|
|
|
|
fn elems_mut(&mut self) -> impl Iterator<Item = &mut Element<'a, Message>> {
|
|
std::iter::once(&mut self.start)
|
|
.chain(std::iter::once(&mut self.end))
|
|
.chain(self.center.as_mut())
|
|
}
|
|
}
|
|
|
|
impl<'a, Message: Clone + 'static> Widget<Message, crate::Theme, crate::Renderer>
|
|
for HeaderBarWidget<'a, Message>
|
|
{
|
|
fn diff(&mut self, tree: &mut tree::Tree) {
|
|
if let Some(center) = &mut self.center {
|
|
tree.diff_children(&mut [&mut self.start, &mut self.end, center]);
|
|
} else {
|
|
tree.diff_children(&mut [&mut self.start, &mut self.end]);
|
|
}
|
|
}
|
|
|
|
fn children(&self) -> Vec<tree::Tree> {
|
|
self.elems().map(tree::Tree::new).collect()
|
|
}
|
|
|
|
fn size(&self) -> Size<Length> {
|
|
Size {
|
|
width: Length::Fill,
|
|
height: Length::Shrink,
|
|
}
|
|
}
|
|
|
|
fn layout(
|
|
&mut self,
|
|
tree: &mut tree::Tree,
|
|
renderer: &crate::Renderer,
|
|
limits: &layout::Limits,
|
|
) -> layout::Node {
|
|
let width = limits.max().width;
|
|
let height = limits.max().height;
|
|
let gap = 8.0;
|
|
|
|
let end_node =
|
|
self.end
|
|
.as_widget_mut()
|
|
.layout(&mut tree.children[1], renderer, &limits.loose());
|
|
let end_width = end_node.size().width;
|
|
|
|
let start_available = (width - end_width - gap).max(0.0);
|
|
let start_node = self.start.as_widget_mut().layout(
|
|
&mut tree.children[0],
|
|
renderer,
|
|
&layout::Limits::new(Size::ZERO, Size::new(start_available, height)),
|
|
);
|
|
let start_width = start_node.size().width;
|
|
|
|
let vcenter = |node: layout::Node, x: f32| -> layout::Node {
|
|
let dy = ((height - node.size().height) / 2.0).max(0.0);
|
|
node.translate(Vector::new(x, dy))
|
|
};
|
|
|
|
let mut child_nodes = Vec::with_capacity(3);
|
|
child_nodes.push(vcenter(start_node, 0.0));
|
|
child_nodes.push(vcenter(end_node, width - end_width));
|
|
|
|
if let Some(center) = &mut self.center {
|
|
let slot_start = start_width + gap;
|
|
let slot_end = (width - end_width - gap).max(slot_start);
|
|
let slot_width = slot_end - slot_start;
|
|
// this instead of `node.size().width` prevents center jitter as text ellipsizes
|
|
let natural_width = center
|
|
.as_widget_mut()
|
|
.layout(&mut tree.children[2], renderer, &limits.loose())
|
|
.size()
|
|
.width;
|
|
|
|
let node = center.as_widget_mut().layout(
|
|
&mut tree.children[2],
|
|
renderer,
|
|
&layout::Limits::new(Size::ZERO, Size::new(slot_width, height)),
|
|
);
|
|
|
|
let ideal_x = (width - natural_width) / 2.0;
|
|
let max_x = (width - end_width - gap - natural_width).max(slot_start);
|
|
let center_x = ideal_x.clamp(slot_start, max_x);
|
|
|
|
child_nodes.push(vcenter(node, center_x))
|
|
}
|
|
|
|
layout::Node::with_children(Size::new(width, height), child_nodes)
|
|
}
|
|
|
|
fn draw(
|
|
&self,
|
|
tree: &tree::Tree,
|
|
renderer: &mut crate::Renderer,
|
|
theme: &crate::Theme,
|
|
style: &iced_core::renderer::Style,
|
|
layout: iced_core::Layout<'_>,
|
|
cursor: iced_core::mouse::Cursor,
|
|
viewport: &iced_core::Rectangle,
|
|
) {
|
|
self.elems()
|
|
.zip(&tree.children)
|
|
.zip(layout.children())
|
|
.for_each(|((e, s), l)| {
|
|
e.as_widget()
|
|
.draw(s, renderer, theme, style, l, cursor, viewport);
|
|
});
|
|
}
|
|
|
|
fn update(
|
|
&mut self,
|
|
state: &mut tree::Tree,
|
|
event: &iced_core::Event,
|
|
layout: iced_core::Layout<'_>,
|
|
cursor: iced_core::mouse::Cursor,
|
|
renderer: &crate::Renderer,
|
|
clipboard: &mut dyn iced_core::Clipboard,
|
|
shell: &mut iced_core::Shell<'_, Message>,
|
|
viewport: &iced_core::Rectangle,
|
|
) {
|
|
self.elems_mut()
|
|
.zip(&mut state.children)
|
|
.zip(layout.children())
|
|
.for_each(|((e, s), l)| {
|
|
e.as_widget_mut()
|
|
.update(s, event, l, cursor, renderer, clipboard, shell, viewport);
|
|
});
|
|
}
|
|
|
|
fn mouse_interaction(
|
|
&self,
|
|
state: &tree::Tree,
|
|
layout: iced_core::Layout<'_>,
|
|
cursor: iced_core::mouse::Cursor,
|
|
viewport: &iced_core::Rectangle,
|
|
renderer: &crate::Renderer,
|
|
) -> iced_core::mouse::Interaction {
|
|
self.elems()
|
|
.zip(&state.children)
|
|
.zip(layout.children())
|
|
.map(|((e, s), l)| {
|
|
e.as_widget()
|
|
.mouse_interaction(s, l, cursor, viewport, renderer)
|
|
})
|
|
.max()
|
|
.unwrap_or(iced_core::mouse::Interaction::None)
|
|
}
|
|
|
|
fn operate(
|
|
&mut self,
|
|
state: &mut tree::Tree,
|
|
layout: iced_core::Layout<'_>,
|
|
renderer: &crate::Renderer,
|
|
operation: &mut dyn iced_core::widget::Operation<()>,
|
|
) {
|
|
self.elems_mut()
|
|
.zip(&mut state.children)
|
|
.zip(layout.children())
|
|
.for_each(|((e, s), l)| {
|
|
e.as_widget_mut().operate(s, l, renderer, operation);
|
|
});
|
|
}
|
|
|
|
fn overlay<'b>(
|
|
&'b mut self,
|
|
state: &'b mut tree::Tree,
|
|
layout: iced_core::Layout<'b>,
|
|
renderer: &crate::Renderer,
|
|
viewport: &iced_core::Rectangle,
|
|
translation: Vector,
|
|
) -> Option<iced_core::overlay::Element<'b, Message, crate::Theme, crate::Renderer>> {
|
|
self.elems_mut()
|
|
.zip(&mut state.children)
|
|
.zip(layout.children())
|
|
.find_map(|((e, s), l)| {
|
|
e.as_widget_mut()
|
|
.overlay(s, l, renderer, viewport, translation)
|
|
})
|
|
}
|
|
|
|
fn drag_destinations(
|
|
&self,
|
|
state: &tree::Tree,
|
|
layout: iced_core::Layout<'_>,
|
|
renderer: &crate::Renderer,
|
|
dnd_rectangles: &mut iced_core::clipboard::DndDestinationRectangles,
|
|
) {
|
|
self.elems()
|
|
.zip(&state.children)
|
|
.zip(layout.children())
|
|
.for_each(|((e, s), l)| {
|
|
e.as_widget()
|
|
.drag_destinations(s, l, renderer, dnd_rectangles);
|
|
});
|
|
}
|
|
|
|
#[cfg(feature = "a11y")]
|
|
/// get the a11y nodes for the widget
|
|
fn a11y_nodes(
|
|
&self,
|
|
layout: iced_core::Layout<'_>,
|
|
state: &tree::Tree,
|
|
p: iced::mouse::Cursor,
|
|
) -> iced_accessibility::A11yTree {
|
|
iced_accessibility::A11yTree::join(
|
|
self.elems()
|
|
.zip(&state.children)
|
|
.zip(layout.children())
|
|
.map(|((e, s), l)| e.as_widget().a11y_nodes(l, s, p)),
|
|
)
|
|
}
|
|
}
|
|
|
|
impl<'a, Message: Clone + 'static> From<HeaderBarWidget<'a, Message>> for Element<'a, Message> {
|
|
fn from(w: HeaderBarWidget<'a, Message>) -> Self {
|
|
Element::new(w)
|
|
}
|
|
}
|
|
|
|
impl<'a, Message: Clone + 'static> HeaderBar<'a, Message> {
|
|
/// Converts the headerbar builder into an Iced element.
|
|
pub fn view(mut self) -> Element<'a, Message> {
|
|
let Spacing {
|
|
space_xxxs,
|
|
space_xxs,
|
|
..
|
|
} = theme::spacing();
|
|
let is_ssd = self.is_ssd;
|
|
|
|
// Take ownership of the regions to be packed.
|
|
let start = std::mem::take(&mut self.start);
|
|
let center = std::mem::take(&mut self.center);
|
|
let mut end = std::mem::take(&mut self.end);
|
|
|
|
// Also packs the window controls at the very end.
|
|
end.push(self.window_controls(space_xxs));
|
|
|
|
let padding = if is_ssd {
|
|
[2, 8, 2, 8]
|
|
} else {
|
|
match (
|
|
self.density.unwrap_or_else(crate::config::header_size),
|
|
self.maximized, // window border handling
|
|
) {
|
|
(Density::Compact, true) => [4, 8, 4, 8],
|
|
(Density::Compact, false) => [3, 7, 4, 7],
|
|
(_, true) => [8, 8, 8, 8],
|
|
(_, false) => [7, 7, 8, 7],
|
|
}
|
|
};
|
|
|
|
let start = widget::row::with_children(start)
|
|
.spacing(space_xxxs)
|
|
.align_y(iced::Alignment::Center)
|
|
.into();
|
|
let center = if !center.is_empty() {
|
|
Some(
|
|
widget::row::with_children(center)
|
|
.spacing(space_xxxs)
|
|
.align_y(iced::Alignment::Center)
|
|
.into(),
|
|
)
|
|
} else if !self.title.is_empty() {
|
|
Some(
|
|
widget::text::heading(self.title)
|
|
.wrapping(text::Wrapping::None)
|
|
.ellipsize(text::Ellipsize::End(text::EllipsizeHeightLimit::Lines(1)))
|
|
.into(),
|
|
)
|
|
} else {
|
|
None
|
|
};
|
|
let end = widget::row::with_children(end)
|
|
.spacing(space_xxs)
|
|
.align_y(iced::Alignment::Center)
|
|
.into();
|
|
|
|
let mut widget = HeaderBarWidget::new(start, center, end)
|
|
.apply(widget::container)
|
|
.class(theme::Container::HeaderBar {
|
|
focused: self.focused,
|
|
sharp_corners: self.sharp_corners,
|
|
transparent: if is_ssd { false } else { true },
|
|
})
|
|
.height(Length::Fixed(32.0 + padding[0] as f32 + padding[2] as f32))
|
|
.padding(padding)
|
|
.apply(widget::mouse_area);
|
|
|
|
if let Some(message) = self.on_drag {
|
|
widget = widget.on_drag(message);
|
|
}
|
|
if let Some(message) = self.on_maximize {
|
|
widget = widget.on_release(message);
|
|
}
|
|
if let Some(message) = self.on_double_click {
|
|
widget = widget.on_double_press(message);
|
|
}
|
|
if let Some(message) = self.on_right_click {
|
|
widget = widget.on_right_press(message);
|
|
}
|
|
|
|
widget.into()
|
|
}
|
|
|
|
/// Creates the widget for window controls.
|
|
fn window_controls(&mut self, spacing: u16) -> Element<'a, Message> {
|
|
macro_rules! icon {
|
|
($name:expr, $size:expr, $on_press:expr) => {{
|
|
widget::icon::from_name($name)
|
|
.apply(widget::button::icon)
|
|
.padding(8)
|
|
.class(theme::Button::HeaderBar)
|
|
.selected(self.focused)
|
|
.icon_size($size)
|
|
.on_press($on_press)
|
|
}};
|
|
}
|
|
|
|
widget::row::with_capacity(3)
|
|
.push_maybe(
|
|
self.on_minimize
|
|
.take()
|
|
.map(|m| icon!("window-minimize-symbolic", 16, m)),
|
|
)
|
|
.push_maybe(self.on_maximize.take().map(|m| {
|
|
if self.maximized {
|
|
icon!("window-restore-symbolic", 16, m)
|
|
} else {
|
|
icon!("window-maximize-symbolic", 16, m)
|
|
}
|
|
}))
|
|
.push_maybe(
|
|
self.on_close
|
|
.take()
|
|
.map(|m| icon!("window-close-symbolic", 16, m)),
|
|
)
|
|
.spacing(spacing)
|
|
.align_y(iced::Alignment::Center)
|
|
.into()
|
|
}
|
|
}
|
|
|
|
impl<'a, Message: Clone + 'static> From<HeaderBar<'a, Message>> for Element<'a, Message> {
|
|
fn from(headerbar: HeaderBar<'a, Message>) -> Self {
|
|
headerbar.view()
|
|
}
|
|
}
|