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
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
use std::{
    io::Cursor,
    sync::Arc,
};

use freya_core::{
    plugins::{
        FreyaPlugin,
        PluginsManager,
    },
    style::default_fonts,
};
use freya_engine::prelude::Color;
use freya_node_state::Parse;
use image::io::Reader;
use winit::window::{
    Icon,
    Window,
    WindowAttributes,
};

pub type WindowBuilderHook = Box<dyn Fn(WindowAttributes) -> WindowAttributes>;
pub type EmbeddedFonts<'a> = Vec<(&'a str, &'a [u8])>;

/// Configuration for a Window.
pub struct WindowConfig {
    /// Size of the Window.
    pub size: (f64, f64),
    /// Minimum size of the Window.
    pub min_size: Option<(f64, f64)>,
    /// Maximum size of the Window.
    pub max_size: Option<(f64, f64)>,
    /// Enable Window decorations.
    pub decorations: bool,
    /// Title for the Window.
    pub title: &'static str,
    /// Make the Window transparent or not.
    pub transparent: bool,
    /// Background color of the Window.
    pub background: Color,
    /// The Icon of the Window.
    pub icon: Option<Icon>,
    /// Setup callback.
    pub on_setup: Option<WindowCallback>,
    /// Exit callback.
    pub on_exit: Option<WindowCallback>,
    /// Hook function called with the Window Attributes.
    pub window_attributes_hook: Option<WindowBuilderHook>,
}

impl Default for WindowConfig {
    fn default() -> Self {
        Self {
            size: (600.0, 600.0),
            min_size: None,
            max_size: None,
            decorations: true,
            title: "Freya app",
            transparent: false,
            background: Color::WHITE,
            icon: None,
            on_setup: None,
            on_exit: None,
            window_attributes_hook: None,
        }
    }
}

/// Launch configuration.
pub struct LaunchConfig<'a, T: Clone = ()> {
    pub state: Option<T>,
    pub window_config: WindowConfig,
    pub embedded_fonts: EmbeddedFonts<'a>,
    pub plugins: PluginsManager,
    pub default_fonts: Vec<String>,
}

impl<'a, T: Clone> Default for LaunchConfig<'a, T> {
    fn default() -> Self {
        Self {
            state: None,
            window_config: Default::default(),
            embedded_fonts: Default::default(),
            plugins: Default::default(),
            default_fonts: default_fonts(),
        }
    }
}

impl<'a, T: Clone> LaunchConfig<'a, T> {
    pub fn new() -> LaunchConfig<'a, T> {
        LaunchConfig::default()
    }
}

impl LaunchConfig<'_, ()> {
    pub fn load_icon(icon: &[u8]) -> Icon {
        let reader = Reader::new(Cursor::new(icon))
            .with_guessed_format()
            .expect("Cursor io never fails");
        let image = reader
            .decode()
            .expect("Failed to open icon path")
            .into_rgba8();
        let (width, height) = image.dimensions();
        let rgba = image.into_raw();
        Icon::from_rgba(rgba, width, height).expect("Failed to open icon")
    }
}

pub type WindowCallback = Arc<Box<fn(&mut Window)>>;

impl<'a, T: Clone> LaunchConfig<'a, T> {
    /// Specify a Window size.
    pub fn with_size(mut self, width: f64, height: f64) -> Self {
        self.window_config.size = (width, height);
        self
    }

    /// Specify a minimum Window size.
    pub fn with_min_size(mut self, min_width: f64, min_height: f64) -> Self {
        self.window_config.min_size = Some((min_width, min_height));
        self
    }

    /// Specify a maximum Window size.
    pub fn with_max_size(mut self, max_width: f64, max_height: f64) -> Self {
        self.window_config.max_size = Some((max_width, max_height));
        self
    }

    /// Whether the Window will have decorations or not.
    pub fn with_decorations(mut self, decorations: bool) -> Self {
        self.window_config.decorations = decorations;
        self
    }

    /// Specify the Window title.
    pub fn with_title(mut self, title: &'static str) -> Self {
        self.window_config.title = title;
        self
    }

    /// Make the Window transparent or not.
    pub fn with_transparency(mut self, transparency: bool) -> Self {
        self.window_config.transparent = transparency;
        self
    }

    /// Pass a custom value that your app will consume.
    pub fn with_state(mut self, state: T) -> Self {
        self.state = Some(state);
        self
    }

    /// Specify the Window background color.
    pub fn with_background(mut self, background: &str) -> Self {
        self.window_config.background = Color::parse(background).unwrap_or(Color::WHITE);
        self
    }

    /// Embed a font.
    pub fn with_font(mut self, font_name: &'a str, font: &'a [u8]) -> Self {
        self.embedded_fonts.push((font_name, font));
        self
    }

    /// Clear default fonts.
    pub fn without_default_fonts(mut self) -> Self {
        self.default_fonts.clear();
        self
    }

    /// Regiter a default font.
    pub fn with_default_font(mut self, font_name: &str) -> Self {
        self.default_fonts.push(font_name.to_string());
        self
    }

    /// Specify the Window icon.
    pub fn with_icon(mut self, icon: Icon) -> Self {
        self.window_config.icon = Some(icon);
        self
    }

    /// Register a callback that will be executed when the window is created.
    pub fn on_setup(mut self, callback: fn(&mut Window)) -> Self {
        self.window_config.on_setup = Some(Arc::new(Box::new(callback)));
        self
    }

    /// Register a callback that will be executed when the window is closed.
    pub fn on_exit(mut self, callback: fn(&mut Window)) -> Self {
        self.window_config.on_exit = Some(Arc::new(Box::new(callback)));
        self
    }

    /// Add a new plugin.
    pub fn with_plugin(mut self, plugin: impl FreyaPlugin + 'static) -> Self {
        self.plugins.add_plugin(plugin);
        self
    }

    /// Register a Window Attributes hook.
    pub fn with_window_attributes(
        mut self,
        window_attributes_hook: impl Fn(WindowAttributes) -> WindowAttributes + 'static,
    ) -> Self {
        self.window_config.window_attributes_hook = Some(Box::new(window_attributes_hook));
        self
    }
}