fix RGBA/BGRA bug, working selection screenshot, code cleanup
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parent
6cb6610436
commit
0e34bffc86
171
src/main.rs
171
src/main.rs
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@ -1,85 +1,152 @@
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use x11::xlib::{XGrabPointer, XCreateFontCursor, XOpenDisplay, Display, XDefaultRootWindow, XAllPlanes, ZPixmap, XGetImage, ButtonMotionMask, ButtonPressMask, ButtonReleaseMask, CurrentTime, GrabModeAsync, GrabSuccess, XNextEvent, XEvent, XPending, ButtonPress, ButtonRelease, XButtonEvent, XGrabKeyboard, KeyPress, XKeyEvent};
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use x11::xlib;
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use std::mem::MaybeUninit;
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use image::RgbaImage;
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use image::{RgbaImage};
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use std::convert::TryInto;
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#[derive(Debug)]
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struct Position {
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origin_x: u32,
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origin_y: u32,
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origin_x: i32,
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origin_y: i32,
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height: u32,
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width: u32,
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}
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fn screenshot(pos: &Position) {
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unsafe {
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let display: *mut Display = XOpenDisplay(std::ptr::null());
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let root_window = XDefaultRootWindow(display);
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let len: usize = (pos.height as usize)*(pos.width as usize)*4;
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let mut data: Vec<u8> = unsafe {
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let display: *mut xlib::Display = xlib::XOpenDisplay(std::ptr::null());
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let root_window = xlib::XDefaultRootWindow(display);
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let ximg = XGetImage(display, root_window, pos.origin_x.try_into().unwrap(), pos.origin_y.try_into().unwrap(), pos.width.try_into().unwrap(), pos.height.try_into().unwrap(), XAllPlanes(), ZPixmap);
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let len = pos.height*pos.width*4;
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let v = Vec::<u8>::from_raw_parts((*ximg).data as *mut _, len.try_into().unwrap(), len.try_into().unwrap());
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//println!("{:?}", v);
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let img = RgbaImage::from_raw(pos.width, pos.height, v).unwrap();
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img.save("empty.jpg").unwrap();
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}
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let ximg = xlib::XGetImage(display,
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root_window,
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pos.origin_x,
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pos.origin_y,
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pos.width,
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pos.height,
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xlib::XAllPlanes(),
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xlib::ZPixmap);
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Vec::<u8>::from_raw_parts((*ximg).data as *mut _, len, len)
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};
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let mut c = 0;
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while c < len {
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data.swap(c,c+2);
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c+=4;
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}
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let img = RgbaImage::from_raw(pos.width, pos.height, data).unwrap();
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img.save("empty.png").unwrap();
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}
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// https://bbs.archlinux.org/viewtopic.php?id=85378
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fn trigger_selection() -> Option<Position> {
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fn select_zone() -> Option<Position> {
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unsafe {
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let display: *mut Display = XOpenDisplay(std::ptr::null());
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let root_window = XDefaultRootWindow(display);
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let display: *mut xlib::Display = xlib::XOpenDisplay(std::ptr::null());
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let root_window = xlib::XDefaultRootWindow(display);
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let c = XCreateFontCursor(display, 130); // XC_tcross = 130
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let button_mask = ButtonMotionMask as u32 | ButtonPressMask as u32 | ButtonReleaseMask as u32;
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let c = xlib::XCreateFontCursor(display, 130); // xlib::XC_tcross = 130
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let button_mask = xlib::ButtonMotionMask as u32 | xlib::ButtonPressMask as u32 | xlib::ButtonReleaseMask as u32;
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if XGrabPointer(display, root_window, 0, button_mask, GrabModeAsync, GrabModeAsync, root_window, c, CurrentTime) != GrabSuccess {
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if xlib::XGrabPointer(display, root_window, 0, button_mask, xlib::GrabModeAsync, xlib::GrabModeAsync, root_window, c, xlib::CurrentTime) != xlib::GrabSuccess {
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panic!("could not grab");
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}
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if XGrabKeyboard(display, root_window, 0, GrabModeAsync, GrabModeAsync, CurrentTime) != GrabSuccess {
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if xlib::XGrabKeyboard(display, root_window, 0, xlib::GrabModeAsync, xlib::GrabModeAsync, xlib::CurrentTime) != xlib::GrabSuccess {
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panic!("could not grab");
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}
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let mut pos = Position { origin_x: 0, origin_y: 0, width: 0, height: 0};
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'main: loop {
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while XPending(display) > 0 {
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let mut e: MaybeUninit<XEvent> = MaybeUninit::uninit();
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XNextEvent(display, e.as_mut_ptr());
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let mut gcv = xlib::XGCValues {
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foreground: (255<<16),
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subwindow_mode: xlib::IncludeInferiors,
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plane_mask: 0,
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function: xlib::GXxor,
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background: 0,
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line_width: 2,
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line_style: 0,
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cap_style: 0,
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join_style: 0,
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fill_style: 0,
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fill_rule: 0,
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arc_mode: 0,
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tile: 0,
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stipple: 0,
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ts_x_origin: 0,
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ts_y_origin: 0,
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font: 0,
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graphics_exposures: 0,
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clip_x_origin: 0,
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clip_y_origin: 0,
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clip_mask: 0,
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dash_offset: 0,
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dashes: 0,
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};
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let gcv_mask = xlib::GCSubwindowMode | xlib::GCLineWidth | xlib::GCForeground | xlib::GCFunction;
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let event = unsafe { e.assume_init() };
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let mut old_coord = (0,0);
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let gc = xlib::XCreateGC(display, root_window, gcv_mask.into(), &mut gcv);
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// https://stackoverflow.com/questions/38996916/x11-draw-overlay-remove-drawings-from-overlay
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loop {
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while xlib::XPending(display) > 0 {
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let mut e: MaybeUninit<xlib::XEvent> = MaybeUninit::uninit();
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xlib::XNextEvent(display, e.as_mut_ptr());
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let event = e.assume_init();
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match event.type_ {
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KeyPress => {
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let event = XKeyEvent::from(event);
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if event.keycode == 9 { // escape keycode (xev)
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return None;
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}
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},
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ButtonPress => {
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let event = XButtonEvent::from(event);
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println!("origin = ({},{})", event.x, event.y);
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pos.origin_x = event.x_root.try_into().unwrap();
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pos.origin_y = event.y_root.try_into().unwrap();
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},
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ButtonRelease => {
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// assuming that the upper left corner is the origin
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let event = XButtonEvent::from(event);
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let x: u32 = event.x_root.try_into().unwrap();
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let y: u32 = event.y_root.try_into().unwrap();
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xlib::MotionNotify => {
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let event = xlib::XMotionEvent::from(event);
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pos.width = x - pos.origin_x;
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pos.height = y - pos.origin_y;
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if pos.height == 0 || pos.width == 0 {
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return None
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}
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let width = event.x_root - pos.origin_x;
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let height = event.y_root - pos.origin_y;
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return Some(pos);
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if height < 0 || width < 0 {
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return None;
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}
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xlib::XDrawRectangle(display, root_window, gc, pos.origin_x, pos.origin_y, old_coord.0, old_coord.1);
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xlib::XDrawRectangle(display, root_window, gc, pos.origin_x, pos.origin_y, width.try_into().unwrap(), height.try_into().unwrap());
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old_coord = (width.try_into().unwrap(), height.try_into().unwrap());
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},
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xlib::KeyPress => {
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let event = xlib::XKeyEvent::from(event);
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if event.keycode == 9 { // escape keycode (xev)
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return None;
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}
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},
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xlib::ButtonPress => {
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let event = xlib::XButtonEvent::from(event);
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//println!("origin = ({},{})", event.x, event.y);
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pos.origin_x = event.x_root.try_into().unwrap();
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pos.origin_y = event.y_root.try_into().unwrap();
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},
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xlib::ButtonRelease => {
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// assuming that the upper left corner is the origin
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let event = xlib::XButtonEvent::from(event);
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let x: u32 = event.x_root.try_into().unwrap();
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let y: u32 = event.y_root.try_into().unwrap();
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pos.width = x - pos.origin_x as u32;
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pos.height = y - pos.origin_y as u32;
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if pos.height == 0 || pos.width == 0 {
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return None
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}
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xlib::XDrawRectangle(display, root_window, gc, pos.origin_x, pos.origin_y, pos.width, pos.height);
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xlib::XFlush(display);
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return Some(pos);
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}
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_ => { println!("type unknown: {}", event.type_); }
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}
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@ -92,7 +159,7 @@ fn trigger_selection() -> Option<Position> {
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}
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fn main() {
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let s = trigger_selection();
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let s = select_zone();
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println!("{:?}", s);
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if let Some(select) = s {
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screenshot(&select);
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