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Desktop: Custom cursor support (#3452)

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custom cursors with caching
This commit is contained in:
Timon
2025-12-07 00:16:14 +00:00
committed by GitHub
parent 2e4481880e
commit a5cf62a90b
6 changed files with 68 additions and 16 deletions
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19
desktop/src/cef/internal/display_handler.rs
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@@ -1,6 +1,6 @@
use cef::rc::{Rc, RcImpl};
use cef::sys::{_cef_display_handler_t, cef_base_ref_counted_t, cef_cursor_type_t::*, cef_log_severity_t::*};
use cef::{CefString, ImplDisplayHandler, WrapDisplayHandler};
use cef::{CefString, ImplDisplayHandler, Point, Size, WrapDisplayHandler};
use winit::cursor::CursorIcon;
use crate::cef::CefEventHandler;
@@ -25,7 +25,21 @@ type CefCursorHandle = cef::CursorHandle;
type CefCursorHandle = *mut u8;
impl<H: CefEventHandler> ImplDisplayHandler for DisplayHandlerImpl<H> {
fn on_cursor_change(&self, _browser: Option<&mut cef::Browser>, _cursor: CefCursorHandle, cursor_type: cef::CursorType, _custom_cursor_info: Option<&cef::CursorInfo>) -> std::ffi::c_int {
fn on_cursor_change(&self, _browser: Option<&mut cef::Browser>, _cursor: CefCursorHandle, cursor_type: cef::CursorType, custom_cursor_info: Option<&cef::CursorInfo>) -> std::ffi::c_int {
if let Some(custom_cursor_info) = custom_cursor_info {
let Size { width, height } = custom_cursor_info.size;
let Point { x: hotspot_x, y: hotspot_y } = custom_cursor_info.hotspot;
let buffer_size = (width * height * 4) as usize;
let buffer_ptr = custom_cursor_info.buffer as *const u8;
if !buffer_ptr.is_null() && buffer_ptr.align_offset(std::mem::align_of::<u8>()) == 0 {
let buffer = unsafe { std::slice::from_raw_parts(buffer_ptr, buffer_size) }.to_vec();
let cursor = winit::cursor::CustomCursorSource::from_rgba(buffer, width as u16, height as u16, hotspot_x as u16, hotspot_y as u16).unwrap();
self.event_handler.cursor_change(cursor.into());
return 1; // We handled the cursor change.
}
}
let cursor = match cursor_type.into() {
CT_POINTER => CursorIcon::Default,
CT_CROSS => CursorIcon::Crosshair,
@@ -72,7 +86,6 @@ impl<H: CefEventHandler> ImplDisplayHandler for DisplayHandlerImpl<H> {
CT_GRABBING => CursorIcon::Grabbing,
CT_MIDDLE_PANNING_VERTICAL => CursorIcon::AllScroll,
CT_MIDDLE_PANNING_HORIZONTAL => CursorIcon::AllScroll,
CT_CUSTOM => CursorIcon::Default,
CT_DND_NONE => CursorIcon::Default,
CT_DND_MOVE => CursorIcon::Move,
CT_DND_COPY => CursorIcon::Copy,