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| 1 | +use windows::Win32::Foundation::{HWND, POINT, RECT}; |
| 2 | +use windows::Win32::Graphics::Dwm::{ |
| 3 | + DWMWA_CLOAKED, DWMWA_EXTENDED_FRAME_BOUNDS, DwmGetWindowAttribute, |
| 4 | +}; |
| 5 | +use windows::Win32::Graphics::Gdi::ClientToScreen; |
| 6 | +use windows::Win32::UI::WindowsAndMessaging::{ |
| 7 | + GA_ROOT, GW_HWNDNEXT, GetAncestor, GetTopWindow, GetWindow, GetWindowRect, |
| 8 | + GetWindowThreadProcessId, IsIconic, IsWindowVisible, |
| 9 | +}; |
| 10 | + |
| 11 | +const OCCLUDED_AREA_THRESHOLD: f64 = 1.0; |
| 12 | + |
| 13 | +pub fn is_ads_webview_occluded( |
| 14 | + main_hwnd: HWND, |
| 15 | + x: i32, |
| 16 | + y: i32, |
| 17 | + width: u32, |
| 18 | + height: u32, |
| 19 | +) -> bool { |
| 20 | + let Some(ad_rect) = ad_rect_in_screen(main_hwnd, x, y, width, height) |
| 21 | + else { |
| 22 | + return false; |
| 23 | + }; |
| 24 | + |
| 25 | + if is_empty_rect(&ad_rect) { |
| 26 | + return false; |
| 27 | + } |
| 28 | + |
| 29 | + let ad_area = rect_area(&ad_rect); |
| 30 | + if ad_area == 0 { |
| 31 | + return false; |
| 32 | + } |
| 33 | + |
| 34 | + let mut occluded_area = 0u64; |
| 35 | + let app_root = unsafe { GetAncestor(main_hwnd, GA_ROOT) }; |
| 36 | + let app_process_id = std::process::id(); |
| 37 | + let mut hwnd = match unsafe { GetTopWindow(None) } { |
| 38 | + Ok(hwnd) => hwnd, |
| 39 | + Err(_) => return false, |
| 40 | + }; |
| 41 | + |
| 42 | + while !hwnd.is_invalid() { |
| 43 | + let window_root = unsafe { GetAncestor(hwnd, GA_ROOT) }; |
| 44 | + |
| 45 | + if window_root == app_root { |
| 46 | + return false; |
| 47 | + } |
| 48 | + |
| 49 | + if window_process_id(hwnd) == Some(app_process_id) { |
| 50 | + hwnd = match unsafe { GetWindow(hwnd, GW_HWNDNEXT) } { |
| 51 | + Ok(hwnd) => hwnd, |
| 52 | + Err(_) => break, |
| 53 | + }; |
| 54 | + continue; |
| 55 | + } |
| 56 | + |
| 57 | + if window_counts_as_occluder(hwnd) |
| 58 | + && let Some(occluder_rect) = window_rect(hwnd) |
| 59 | + && let Some(intersection) = |
| 60 | + intersect_rects(&ad_rect, &occluder_rect) |
| 61 | + { |
| 62 | + occluded_area = |
| 63 | + occluded_area.saturating_add(rect_area(&intersection)); |
| 64 | + |
| 65 | + if (occluded_area as f64 / ad_area as f64) |
| 66 | + >= OCCLUDED_AREA_THRESHOLD |
| 67 | + { |
| 68 | + return true; |
| 69 | + } |
| 70 | + } |
| 71 | + |
| 72 | + hwnd = match unsafe { GetWindow(hwnd, GW_HWNDNEXT) } { |
| 73 | + Ok(hwnd) => hwnd, |
| 74 | + Err(_) => break, |
| 75 | + }; |
| 76 | + } |
| 77 | + |
| 78 | + false |
| 79 | +} |
| 80 | + |
| 81 | +fn ad_rect_in_screen( |
| 82 | + main_hwnd: HWND, |
| 83 | + x: i32, |
| 84 | + y: i32, |
| 85 | + width: u32, |
| 86 | + height: u32, |
| 87 | +) -> Option<RECT> { |
| 88 | + let mut origin = POINT { x: 0, y: 0 }; |
| 89 | + |
| 90 | + if !unsafe { ClientToScreen(main_hwnd, &mut origin).as_bool() } { |
| 91 | + return None; |
| 92 | + } |
| 93 | + |
| 94 | + let left = origin.x.saturating_add(x); |
| 95 | + let top = origin.y.saturating_add(y); |
| 96 | + let right = left.saturating_add(width as i32); |
| 97 | + let bottom = top.saturating_add(height as i32); |
| 98 | + |
| 99 | + Some(RECT { |
| 100 | + left, |
| 101 | + top, |
| 102 | + right, |
| 103 | + bottom, |
| 104 | + }) |
| 105 | +} |
| 106 | + |
| 107 | +fn window_counts_as_occluder(hwnd: HWND) -> bool { |
| 108 | + if !unsafe { IsWindowVisible(hwnd).as_bool() } { |
| 109 | + return false; |
| 110 | + } |
| 111 | + |
| 112 | + if unsafe { IsIconic(hwnd).as_bool() } { |
| 113 | + return false; |
| 114 | + } |
| 115 | + |
| 116 | + if is_dwm_cloaked(hwnd) { |
| 117 | + return false; |
| 118 | + } |
| 119 | + |
| 120 | + true |
| 121 | +} |
| 122 | + |
| 123 | +fn window_process_id(hwnd: HWND) -> Option<u32> { |
| 124 | + let mut process_id = 0u32; |
| 125 | + |
| 126 | + unsafe { |
| 127 | + GetWindowThreadProcessId(hwnd, Some(&mut process_id)); |
| 128 | + } |
| 129 | + |
| 130 | + (process_id != 0).then_some(process_id) |
| 131 | +} |
| 132 | + |
| 133 | +fn is_dwm_cloaked(hwnd: HWND) -> bool { |
| 134 | + let mut cloaked = 0u32; |
| 135 | + |
| 136 | + unsafe { |
| 137 | + DwmGetWindowAttribute( |
| 138 | + hwnd, |
| 139 | + DWMWA_CLOAKED, |
| 140 | + &mut cloaked as *mut u32 as *mut _, |
| 141 | + std::mem::size_of::<u32>() as u32, |
| 142 | + ) |
| 143 | + } |
| 144 | + .is_ok() |
| 145 | + && cloaked != 0 |
| 146 | +} |
| 147 | + |
| 148 | +fn window_rect(hwnd: HWND) -> Option<RECT> { |
| 149 | + let mut rect = RECT::default(); |
| 150 | + |
| 151 | + if unsafe { |
| 152 | + DwmGetWindowAttribute( |
| 153 | + hwnd, |
| 154 | + DWMWA_EXTENDED_FRAME_BOUNDS, |
| 155 | + &mut rect as *mut RECT as *mut _, |
| 156 | + std::mem::size_of::<RECT>() as u32, |
| 157 | + ) |
| 158 | + } |
| 159 | + .is_err() |
| 160 | + && unsafe { GetWindowRect(hwnd, &mut rect) }.is_err() |
| 161 | + { |
| 162 | + return None; |
| 163 | + } |
| 164 | + |
| 165 | + if is_empty_rect(&rect) { |
| 166 | + return None; |
| 167 | + } |
| 168 | + |
| 169 | + Some(rect) |
| 170 | +} |
| 171 | + |
| 172 | +fn is_empty_rect(rect: &RECT) -> bool { |
| 173 | + rect.right <= rect.left || rect.bottom <= rect.top |
| 174 | +} |
| 175 | + |
| 176 | +fn rect_area(rect: &RECT) -> u64 { |
| 177 | + if is_empty_rect(rect) { |
| 178 | + return 0; |
| 179 | + } |
| 180 | + |
| 181 | + (rect.right - rect.left) as u64 * (rect.bottom - rect.top) as u64 |
| 182 | +} |
| 183 | + |
| 184 | +fn intersect_rects(a: &RECT, b: &RECT) -> Option<RECT> { |
| 185 | + let rect = RECT { |
| 186 | + left: a.left.max(b.left), |
| 187 | + top: a.top.max(b.top), |
| 188 | + right: a.right.min(b.right), |
| 189 | + bottom: a.bottom.min(b.bottom), |
| 190 | + }; |
| 191 | + |
| 192 | + (!is_empty_rect(&rect)).then_some(rect) |
| 193 | +} |
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