cosmic/widget/button/
link.rs

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1// Copyright 2023 System76 <info@system76.com>
2// SPDX-License-Identifier: MPL-2.0
3
4//! Hyperlink button widget
5
6use super::Builder;
7use super::ButtonClass;
8use crate::Element;
9use crate::prelude::*;
10use crate::widget::icon::{self, Handle};
11use crate::widget::{button, row, tooltip};
12use iced_core::text::LineHeight;
13use iced_core::{Alignment, Length, Padding, font::Weight, widget::Id};
14use std::borrow::Cow;
15
16pub type Button<'a, Message> = Builder<'a, Message, Hyperlink>;
17
18pub struct Hyperlink {
19    trailing_icon: bool,
20}
21
22/// A hyperlink button.
23pub fn link<'a, Message>(label: impl Into<Cow<'a, str>> + 'static) -> Button<'a, Message> {
24    Button::new(
25        label,
26        Hyperlink {
27            trailing_icon: false,
28        },
29    )
30}
31
32impl<'a, Message> Button<'a, Message> {
33    pub fn new(label: impl Into<Cow<'a, str>> + 'static, link: Hyperlink) -> Self {
34        Self {
35            id: Id::unique(),
36            label: label.into(),
37            tooltip: Cow::Borrowed(""),
38            on_press: None,
39            width: Length::Shrink,
40            height: Length::Shrink,
41            padding: Padding::from(4),
42            spacing: 0,
43            icon_size: 16,
44            line_height: 20,
45            font_size: 14,
46            font_weight: Weight::Normal,
47            class: ButtonClass::Link,
48            variant: link,
49        }
50    }
51
52    pub const fn trailing_icon(mut self, set: bool) -> Self {
53        self.variant.trailing_icon = set;
54        self
55    }
56}
57
58#[inline(never)]
59pub fn icon() -> Handle {
60    icon::from_svg_bytes(&include_bytes!("external-link.svg")[..]).symbolic(true)
61}
62
63impl<'a, Message: Clone + 'static> From<Button<'a, Message>> for Element<'a, Message> {
64    fn from(mut builder: Button<'a, Message>) -> Element<'a, Message> {
65        let button: super::Button<'a, Message> = row::with_capacity(2)
66            .push({
67                // TODO: Avoid allocation
68                crate::widget::text(builder.label.to_string())
69                    .size(builder.font_size)
70                    .line_height(LineHeight::Absolute(builder.line_height.into()))
71                    .font(crate::font::Font {
72                        weight: builder.font_weight,
73                        ..crate::font::default()
74                    })
75            })
76            .push_maybe(if builder.variant.trailing_icon {
77                Some(icon().icon().size(builder.icon_size))
78            } else {
79                None
80            })
81            .padding(builder.padding)
82            .width(builder.width)
83            .height(builder.height)
84            .spacing(builder.spacing)
85            .align_y(Alignment::Center)
86            .apply(button::custom)
87            .padding(0)
88            .id(builder.id)
89            .on_press_maybe(builder.on_press.take())
90            .class(builder.class);
91
92        if builder.tooltip.is_empty() {
93            button.into()
94        } else {
95            tooltip(
96                button,
97                crate::widget::text(builder.tooltip)
98                    .size(builder.font_size)
99                    .font(crate::font::Font {
100                        weight: builder.font_weight,
101                        ..crate::font::default()
102                    }),
103                tooltip::Position::Top,
104            )
105            .into()
106        }
107    }
108}
cosmic/widget/button/link.rs

cosmic/widget/button/
link.rs
