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| 1 | +//! Layout management for notification positioning and stacking |
| 2 | +//! |
| 3 | +//! Handles positioning notifications on screen and managing the stack |
| 4 | +//! when multiple notifications are visible. |
| 5 | + |
| 6 | +use gartk_core::Rect; |
| 7 | +use gartk_x11::Connection; |
| 8 | +use tracing::debug; |
| 9 | + |
| 10 | +/// Screen position for notifications |
| 11 | +#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)] |
| 12 | +pub enum NotificationPosition { |
| 13 | + TopLeft, |
| 14 | + #[default] |
| 15 | + TopRight, |
| 16 | + BottomLeft, |
| 17 | + BottomRight, |
| 18 | + TopCenter, |
| 19 | + BottomCenter, |
| 20 | +} |
| 21 | + |
| 22 | +impl NotificationPosition { |
| 23 | + /// Parse from string (for config) |
| 24 | + pub fn from_str(s: &str) -> Self { |
| 25 | + match s.to_lowercase().as_str() { |
| 26 | + "top-left" | "topleft" => Self::TopLeft, |
| 27 | + "top-right" | "topright" => Self::TopRight, |
| 28 | + "bottom-left" | "bottomleft" => Self::BottomLeft, |
| 29 | + "bottom-right" | "bottomright" => Self::BottomRight, |
| 30 | + "top-center" | "topcenter" => Self::TopCenter, |
| 31 | + "bottom-center" | "bottomcenter" => Self::BottomCenter, |
| 32 | + _ => Self::TopRight, |
| 33 | + } |
| 34 | + } |
| 35 | +} |
| 36 | + |
| 37 | +impl std::fmt::Display for NotificationPosition { |
| 38 | + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { |
| 39 | + let s = match self { |
| 40 | + Self::TopLeft => "top-left", |
| 41 | + Self::TopRight => "top-right", |
| 42 | + Self::BottomLeft => "bottom-left", |
| 43 | + Self::BottomRight => "bottom-right", |
| 44 | + Self::TopCenter => "top-center", |
| 45 | + Self::BottomCenter => "bottom-center", |
| 46 | + }; |
| 47 | + write!(f, "{}", s) |
| 48 | + } |
| 49 | +} |
| 50 | + |
| 51 | +/// Direction notifications stack |
| 52 | +#[derive(Debug, Clone, Copy, PartialEq, Eq)] |
| 53 | +pub enum StackDirection { |
| 54 | + /// Stack downward (for top positions) |
| 55 | + Down, |
| 56 | + /// Stack upward (for bottom positions) |
| 57 | + Up, |
| 58 | +} |
| 59 | + |
| 60 | +/// Layout manager for notification popups |
| 61 | +pub struct LayoutManager { |
| 62 | + /// Screen width |
| 63 | + screen_width: u32, |
| 64 | + /// Screen height |
| 65 | + screen_height: u32, |
| 66 | + /// Notification width |
| 67 | + notification_width: u32, |
| 68 | + /// Margin from screen edges |
| 69 | + margin: u32, |
| 70 | + /// Gap between stacked notifications |
| 71 | + gap: u32, |
| 72 | + /// Position anchor |
| 73 | + position: NotificationPosition, |
| 74 | + /// Maximum visible notifications |
| 75 | + max_visible: u32, |
| 76 | + /// Currently occupied slots (notification IDs) |
| 77 | + slots: Vec<Option<u32>>, |
| 78 | +} |
| 79 | + |
| 80 | +impl LayoutManager { |
| 81 | + /// Create a new layout manager |
| 82 | + pub fn new(conn: &Connection, width: u32, position: NotificationPosition, max_visible: u32) -> Self { |
| 83 | + let screen_width = conn.screen_width() as u32; |
| 84 | + let screen_height = conn.screen_height() as u32; |
| 85 | + |
| 86 | + debug!( |
| 87 | + "LayoutManager: screen={}x{}, position={}, width={}, max={}", |
| 88 | + screen_width, screen_height, position, width, max_visible |
| 89 | + ); |
| 90 | + |
| 91 | + Self { |
| 92 | + screen_width, |
| 93 | + screen_height, |
| 94 | + notification_width: width, |
| 95 | + margin: 16, |
| 96 | + gap: 8, |
| 97 | + position, |
| 98 | + max_visible, |
| 99 | + slots: vec![None; max_visible as usize], |
| 100 | + } |
| 101 | + } |
| 102 | + |
| 103 | + /// Get the stack direction based on position |
| 104 | + pub fn stack_direction(&self) -> StackDirection { |
| 105 | + match self.position { |
| 106 | + NotificationPosition::TopLeft |
| 107 | + | NotificationPosition::TopRight |
| 108 | + | NotificationPosition::TopCenter => StackDirection::Down, |
| 109 | + NotificationPosition::BottomLeft |
| 110 | + | NotificationPosition::BottomRight |
| 111 | + | NotificationPosition::BottomCenter => StackDirection::Up, |
| 112 | + } |
| 113 | + } |
| 114 | + |
| 115 | + /// Allocate a slot for a notification, returns the slot index |
| 116 | + pub fn allocate_slot(&mut self, notification_id: u32) -> Option<usize> { |
| 117 | + // Find first empty slot |
| 118 | + for (i, slot) in self.slots.iter_mut().enumerate() { |
| 119 | + if slot.is_none() { |
| 120 | + *slot = Some(notification_id); |
| 121 | + debug!("Allocated slot {} for notification {}", i, notification_id); |
| 122 | + return Some(i); |
| 123 | + } |
| 124 | + } |
| 125 | + debug!( |
| 126 | + "No slots available for notification {} (max={})", |
| 127 | + notification_id, self.max_visible |
| 128 | + ); |
| 129 | + None |
| 130 | + } |
| 131 | + |
| 132 | + /// Release a slot |
| 133 | + pub fn release_slot(&mut self, notification_id: u32) { |
| 134 | + for slot in &mut self.slots { |
| 135 | + if *slot == Some(notification_id) { |
| 136 | + *slot = None; |
| 137 | + debug!("Released slot for notification {}", notification_id); |
| 138 | + return; |
| 139 | + } |
| 140 | + } |
| 141 | + } |
| 142 | + |
| 143 | + /// Get the slot index for a notification |
| 144 | + pub fn get_slot(&self, notification_id: u32) -> Option<usize> { |
| 145 | + self.slots |
| 146 | + .iter() |
| 147 | + .position(|s| *s == Some(notification_id)) |
| 148 | + } |
| 149 | + |
| 150 | + /// Calculate notification geometry for a given slot and height |
| 151 | + pub fn calculate_geometry(&self, slot: usize, height: u32) -> Rect { |
| 152 | + let x = self.calculate_x(); |
| 153 | + let y = self.calculate_y(slot, height); |
| 154 | + |
| 155 | + Rect::new(x, y, self.notification_width, height) |
| 156 | + } |
| 157 | + |
| 158 | + /// Calculate X position based on screen position |
| 159 | + fn calculate_x(&self) -> i32 { |
| 160 | + match self.position { |
| 161 | + NotificationPosition::TopLeft | NotificationPosition::BottomLeft => self.margin as i32, |
| 162 | + NotificationPosition::TopRight | NotificationPosition::BottomRight => { |
| 163 | + self.screen_width as i32 - self.notification_width as i32 - self.margin as i32 |
| 164 | + } |
| 165 | + NotificationPosition::TopCenter | NotificationPosition::BottomCenter => { |
| 166 | + (self.screen_width as i32 - self.notification_width as i32) / 2 |
| 167 | + } |
| 168 | + } |
| 169 | + } |
| 170 | + |
| 171 | + /// Calculate Y position based on slot and stack direction |
| 172 | + fn calculate_y(&self, slot: usize, height: u32) -> i32 { |
| 173 | + // Calculate offset from edge based on slot position |
| 174 | + let slot_offset = self.calculate_slot_offset(slot, height); |
| 175 | + |
| 176 | + match self.stack_direction() { |
| 177 | + StackDirection::Down => self.margin as i32 + slot_offset, |
| 178 | + StackDirection::Up => { |
| 179 | + self.screen_height as i32 - height as i32 - self.margin as i32 - slot_offset |
| 180 | + } |
| 181 | + } |
| 182 | + } |
| 183 | + |
| 184 | + /// Calculate cumulative offset for a slot (accounts for varying heights) |
| 185 | + fn calculate_slot_offset(&self, slot: usize, height: u32) -> i32 { |
| 186 | + // For simplicity, assume uniform height for now |
| 187 | + // In a full implementation, we'd track actual heights of each slot |
| 188 | + (slot as i32) * (height as i32 + self.gap as i32) |
| 189 | + } |
| 190 | + |
| 191 | + /// Get the notification width |
| 192 | + pub fn notification_width(&self) -> u32 { |
| 193 | + self.notification_width |
| 194 | + } |
| 195 | + |
| 196 | + /// Check if there are available slots |
| 197 | + pub fn has_available_slot(&self) -> bool { |
| 198 | + self.slots.iter().any(|s| s.is_none()) |
| 199 | + } |
| 200 | + |
| 201 | + /// Get number of active notifications |
| 202 | + pub fn active_count(&self) -> usize { |
| 203 | + self.slots.iter().filter(|s| s.is_some()).count() |
| 204 | + } |
| 205 | +} |