aboutsummaryrefslogtreecommitdiff
path: root/src/desktop.rs
blob: 2e854ecc43313f145e8bc72bec12d30148eb536b (plain)
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
213
214
215
216
217
218
219
220
221
use x11::xlib;
use x11::xlib::{
    Display,
};

use safe_x11::window::XWindow;
use safe_x11::{
    screen_size,
};

pub struct Desktop {
    #[allow(dead_code)]
    display: *mut Display,
    #[allow(dead_code)]
    tag: String,
    window_list: Vec<XWindow>,
    cw_idx: usize,
}

impl Desktop {
    pub fn new(display: *mut Display, tag: &'static str) -> Desktop {
        Desktop {
            display: display,
            tag: String::from(tag),
            window_list: vec![],
            cw_idx: 0,
        }
    }

    /// Tells if the current index is valid for indexing the window list.
    /// 
    /// This is a precondition that must be valid wherever one index that
    /// list.
    fn valid_idx(&self) -> bool {
        self.cw_idx != usize::max_value()
    }

    /// Get the current window focused on this desktop.
    pub fn current_window(&self) -> Option<&XWindow> {
        if self.cw_idx < self.window_list.len() {
            self.window_list.get(self.cw_idx)
        } else {
            None
        }
    }

    /// Same as `current_window` but getting a mut reference.
    pub fn current_window_mut(&mut self) -> Option<&mut XWindow> {
        if self.cw_idx < self.window_list.len() {
            self.window_list.get_mut(self.cw_idx)
        } else {
            None
        }
    }

    /// Add a window to the current desktop
    pub fn add_window(&mut self, w: xlib::Window) {
        if self.window_idx(w).is_some() {
            return;
        }
        self.unfocus_current_window();
        if let Some(w) = XWindow::new(self.display, w) {
            // Throw an event when:
            // * We enter a window
            // * The window is exposed
            // * We move around the window
            //w.select_input(xlib::EnterWindowMask | xlib::ExposureMask | xlib::PointerMotionMask);
            w.select_input(xlib::EnterWindowMask | xlib::ExposureMask);
            self.window_list.push(w);
            self.cw_idx = self.window_list.len() - 1;
            // Last windows get focus.
            self.focus_current_window();
        } else {
            println!("XWindow::new responded None");
        }
    }

    /// Remove a window focusing the previous one on the list.
    pub fn remove_window(&mut self, w: xlib::Window) {
        // Get the position of this window.
        let pos = self.window_list.iter().position(|xw| xw.inner == w);
        
        // Only remove it if we found the position of the window.
        if let Some(idx) = pos {
            // Get the index of the previous window. Keep it in 0 if it's the
            // first window.
            // NOTE: maybe we should do something if the window_list.len() is 1
            let new_idx = if idx == 0 {
                0
            } else {
                idx - 1
            };
            self.window_list.remove(idx);
            self.cw_idx = new_idx;
            self.focus_current_window();
        }
    }

    /// Changes the focus from the current window to the window on the idx
    /// postition on the window_list.
    pub fn change_focus_of(&mut self, idx: usize) {
        let w = &self.window_list[idx];
        self.unfocus_current_window();
        self.cw_idx = idx;
        w.set_border_width(1);
        w.set_border_color("red");
        w.raise();
    }

    /// Find a given window and returns it's position on the window_list.
    pub fn window_idx(&self, w: xlib::Window) -> Option<usize> {
        self.window_list.iter().position(|xw| xw.inner == w)
    }

    /// Find a `XWindow` given a `xlib::Window`.
    pub fn find_window(&self, w: xlib::Window) -> Option<&XWindow> { 
        if let Some(idx) = self.window_idx(w) {
            self.window_list.get(idx)
        } else {
            None
        }
    }
    /// Same as `find_window` but returning a mut reference.
    pub fn find_window_mut(&mut self, w: xlib::Window) -> Option<&mut XWindow> {
        if let Some(idx) = self.window_idx(w) {
            self.window_list.get_mut(idx)
        } else {
            None
        }
    }

    /// Focus the next window.
    ///
    /// There're 3 posibilities. There's no window, there's one window or there
    /// are more windows.
    pub fn focus_next(&mut self) {
        if self.valid_idx() {
            // Unfocus the current window.
            let prev_win = &self.window_list[self.cw_idx];
            prev_win.unfocus();

            // And give focus to the next one.
            let next_win_idx = if self.cw_idx < self.window_list.len() - 1 {
                self.cw_idx + 1
            } else {
                0
            };

            let curr_win = &self.window_list[next_win_idx];
            curr_win.focus();
            self.cw_idx = next_win_idx;
        }
    }

    fn focus_current_window(&self) {
        self.current_window().map(|x| x.focus());
    }

    fn unfocus_current_window(&self) {
        self.current_window().map(|x| x.unfocus());
    }

    /// Get a list of the geometries for every window in the screen (including
    /// the screen borders. The form is (x, y).
    ///
    /// # Example
    ///
    /// Having a screen of 800x600, and a window on 10(x), 10(y) with dimensions 
    /// 400(width) and 300(height):
    ///
    /// ```
    /// for (x, y) in dotwm.geometries() {
    ///     println!("x: {} - y: {}", x, y);
    /// }
    /// ```
    ///
    /// The output will be:
    ///
    /// ```
    /// (0,0)
    /// (800, 600)
    /// (10, 10)
    /// (410, 310)
    /// ```
    pub fn geometries(&self) -> Vec<(i32,i32)> {
        let (screen_width, screen_height) = screen_size(self.display);
        let mut result: Vec<(i32,i32)> = vec![
            (0, 0),
            (screen_width as i32, screen_height as i32),
        ];

        for w in &self.window_list {
            let attrs = w.attributes();
            result.push((attrs.x, attrs.y));
            result.push((attrs.x + attrs.width, attrs.y + attrs.height));
        }

        result
    }

    pub fn x_geometries(&self) -> Vec<i32> {
        self.geometries().iter().map(|x| x.0).collect()
    }

    pub fn y_geometries(&self) -> Vec<i32> {
        self.geometries().iter().map(|x| x.1).collect()
    }


    pub fn show_windows(&self) {
        for win in &self.window_list {
            win.map();
        }
    }

    pub fn hide_windows(&self) {
        for win in &self.window_list {
            win.unmap();
        }
    }
}