1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170

use crate::{css, Align, Bus, Css, Element, Length, Widget};

use dodrio::bumpalo;
use std::u32;

/// A container that distributes its contents horizontally.
///
/// A [`Row`] will try to fill the horizontal space of its container.
///
/// [`Row`]: struct.Row.html
#[allow(missing_debug_implementations)]
pub struct Row<'a, Message> {
    spacing: u16,
    padding: u16,
    width: Length,
    height: Length,
    max_width: u32,
    max_height: u32,
    align_items: Align,
    children: Vec<Element<'a, Message>>,
}

impl<'a, Message> Row<'a, Message> {
    /// Creates an empty [`Row`].
    ///
    /// [`Row`]: struct.Row.html
    pub fn new() -> Self {
        Self::with_children(Vec::new())
    }

    /// Creates a [`Row`] with the given elements.
    ///
    /// [`Row`]: struct.Row.html
    pub fn with_children(children: Vec<Element<'a, Message>>) -> Self {
        Row {
            spacing: 0,
            padding: 0,
            width: Length::Fill,
            height: Length::Shrink,
            max_width: u32::MAX,
            max_height: u32::MAX,
            align_items: Align::Start,
            children,
        }
    }

    /// Sets the horizontal spacing _between_ elements.
    ///
    /// Custom margins per element do not exist in Iced. You should use this
    /// method instead! While less flexible, it helps you keep spacing between
    /// elements consistent.
    pub fn spacing(mut self, units: u16) -> Self {
        self.spacing = units;
        self
    }

    /// Sets the padding of the [`Row`].
    ///
    /// [`Row`]: struct.Row.html
    pub fn padding(mut self, units: u16) -> Self {
        self.padding = units;
        self
    }

    /// Sets the width of the [`Row`].
    ///
    /// [`Row`]: struct.Row.html
    pub fn width(mut self, width: Length) -> Self {
        self.width = width;
        self
    }

    /// Sets the height of the [`Row`].
    ///
    /// [`Row`]: struct.Row.html
    pub fn height(mut self, height: Length) -> Self {
        self.height = height;
        self
    }

    /// Sets the maximum width of the [`Row`].
    ///
    /// [`Row`]: struct.Row.html
    pub fn max_width(mut self, max_width: u32) -> Self {
        self.max_width = max_width;
        self
    }

    /// Sets the maximum height of the [`Row`].
    ///
    /// [`Row`]: struct.Row.html
    pub fn max_height(mut self, max_height: u32) -> Self {
        self.max_height = max_height;
        self
    }

    /// Sets the vertical alignment of the contents of the [`Row`] .
    ///
    /// [`Row`]: struct.Row.html
    pub fn align_items(mut self, align: Align) -> Self {
        self.align_items = align;
        self
    }

    /// Adds an [`Element`] to the [`Row`].
    ///
    /// [`Element`]: ../struct.Element.html
    /// [`Row`]: struct.Row.html
    pub fn push<E>(mut self, child: E) -> Self
    where
        E: Into<Element<'a, Message>>,
    {
        self.children.push(child.into());
        self
    }
}

impl<'a, Message> Widget<Message> for Row<'a, Message> {
    fn node<'b>(
        &self,
        bump: &'b bumpalo::Bump,
        publish: &Bus<Message>,
        style_sheet: &mut Css<'b>,
    ) -> dodrio::Node<'b> {
        use dodrio::builder::*;

        let children: Vec<_> = self
            .children
            .iter()
            .map(|element| element.widget.node(bump, publish, style_sheet))
            .collect();

        let row_class = style_sheet.insert(bump, css::Rule::Row);

        let spacing_class =
            style_sheet.insert(bump, css::Rule::Spacing(self.spacing));

        let padding_class =
            style_sheet.insert(bump, css::Rule::Padding(self.padding));

        // TODO: Complete styling
        div(bump)
            .attr(
                "class",
                bumpalo::format!(in bump, "{} {} {}", row_class, spacing_class, padding_class)
                    .into_bump_str(),
            )
            .attr("style", bumpalo::format!(
                    in bump,
                    "width: {}; height: {}; max-width: {}; max-height: {}; align-items: {}",
                    css::length(self.width),
                    css::length(self.height),
                    css::max_length(self.max_width),
                    css::max_length(self.max_height),
                    css::align(self.align_items)
                ).into_bump_str()
            )
            .children(children)
            .finish()
    }
}

impl<'a, Message> From<Row<'a, Message>> for Element<'a, Message>
where
    Message: 'static,
{
    fn from(column: Row<'a, Message>) -> Element<'a, Message> {
        Element::new(column)
    }
}