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perf(stack): reduce allocations in Tabs::new

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Michael Aaron Murphy 2024-03-01 15:13:43 +01:00 • committed by Victoria Brekenfeld
parent 26400b5fcd
commit a6c26b0bde
1 changed files with 66 additions and 79 deletions
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145
src/shell/element/stack/tabs.rs
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@ -114,92 +114,79 @@ where
Message: TabMessage + 'static, Message: TabMessage + 'static,
{ {
pub fn new( pub fn new(
tabs: impl IntoIterator<Item = Tab<Message>>, tabs: impl ExactSizeIterator<Item = Tab<Message>>,
active: usize, active: usize,
activated: bool, activated: bool,
group_focused: bool, group_focused: bool,
) -> Self { ) -> Self {
let mut tabs = tabs let tabs = tabs.into_iter().enumerate().map(|(i, tab)| {
.into_iter() let rule = if activated {
.enumerate() TabRuleTheme::ActiveActivated
.map(|(i, tab)| { } else {
let rule = if activated { TabRuleTheme::ActiveDeactivated
TabRuleTheme::ActiveActivated };
} else {
TabRuleTheme::ActiveDeactivated
};
let tab = if i == active { let tab = if i == active {
tab.rule_style(rule) tab.rule_style(rule)
.background_style(if activated { .background_style(if activated {
TabBackgroundTheme::ActiveActivated TabBackgroundTheme::ActiveActivated
} else {
TabBackgroundTheme::ActiveDeactivated
})
.font(cosmic::font::FONT_SEMIBOLD)
.active()
} else if i.checked_sub(1) == Some(active) {
tab.rule_style(rule).non_active()
} else {
tab.non_active()
};
Element::new(tab.internal(i))
})
.collect::<Vec<_>>();
tabs.push(
widget::vertical_rule(4)
.style(if tabs.len() - 1 == active {
if activated {
TabRuleTheme::ActiveActivated
} else { } else {
TabRuleTheme::ActiveDeactivated TabBackgroundTheme::ActiveDeactivated
} })
} else { .font(cosmic::font::FONT_SEMIBOLD)
TabRuleTheme::Default .active()
}) } else if i.checked_sub(1) == Some(active) {
.into(), tab.rule_style(rule).non_active()
); } else {
tab.non_active()
};
Element::new(tab.internal(i))
});
let tabs_rule = widget::vertical_rule(4).style(if tabs.len() - 1 == active {
if activated {
TabRuleTheme::ActiveActivated
} else {
TabRuleTheme::ActiveDeactivated
}
} else {
TabRuleTheme::Default
});
let rule_style = if group_focused {
TabRuleTheme::ActiveActivated
} else {
TabRuleTheme::Default
};
let prev_button = from_name("go-previous-symbolic")
.size(16)
.prefer_svg(true)
.icon()
.apply(widget::button)
.style(theme::iced::Button::Text)
.on_press(Message::scroll_back());
let next_button = from_name("go-next-symbolic")
.size(16)
.prefer_svg(true)
.icon()
.apply(widget::button)
.style(theme::iced::Button::Text)
.on_press(Message::scroll_further());
let mut elements = Vec::with_capacity(tabs.len() + 5);
elements.push(widget::vertical_rule(4).style(rule_style).into());
elements.push(prev_button.into());
elements.extend(tabs);
elements.push(tabs_rule.into());
elements.push(next_button.into());
elements.push(widget::vertical_rule(4).style(rule_style).into());
Tabs { Tabs {
elements: vec![ elements,
widget::vertical_rule(4)
.style(if group_focused {
TabRuleTheme::ActiveActivated
} else {
TabRuleTheme::Default
})
.into(),
from_name("go-previous-symbolic")
.size(16)
.prefer_svg(true)
.icon()
.apply(widget::button)
.style(theme::iced::Button::Text)
.on_press(Message::scroll_back())
.into(),
]
.into_iter()
.chain(tabs)
.chain(vec![
from_name("go-next-symbolic")
.size(16)
.prefer_svg(true)
.icon()
.apply(widget::button)
.style(theme::iced::Button::Text)
.on_press(Message::scroll_further())
.into(),
widget::vertical_rule(4)
.style(if group_focused {
TabRuleTheme::ActiveActivated
} else {
TabRuleTheme::Default
})
.into(),
])
.collect(),
id: None, id: None,
width: Length::Fill, width: Length::Fill,
height: Length::Shrink, height: Length::Shrink,
@ -332,7 +319,7 @@ where
} }
fn children(&self) -> Vec<Tree> { fn children(&self) -> Vec<Tree> {
self.elements.iter().map(|elem| Tree::new(elem)).collect() self.elements.iter().map(Tree::new).collect()
} }
fn diff(&mut self, tree: &mut Tree) { fn diff(&mut self, tree: &mut Tree) {