mirror of
https://git.sr.ht/~eliasnaur/gio
synced 2026-07-01 07:35:40 +00:00
Elias Naur
6879a30582
This is mostly a refactor, but there are two user-visible effects: - Window.NextEvent may be called even after DestroyEvent is returned. - Window.Invalidate always wakes up a blocking NextEvent, even when a FrameEvent cannot be generated. As a nice side-effect, X11, Wayland and Wasm no longer require separate goroutines for their window loops. Signed-off-by: Elias Naur <mail@eliasnaur.com>
125 lines
3.6 KiB
Go
125 lines
3.6 KiB
Go
// SPDX-License-Identifier: Unlicense OR MIT
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//go:build (linux && !android) || freebsd || openbsd
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// +build linux,!android freebsd openbsd
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package app
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import (
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"errors"
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"unsafe"
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"gioui.org/io/event"
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"gioui.org/io/pointer"
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)
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// ViewEvent provides handles to the underlying window objects for the
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// current display protocol.
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type ViewEvent interface {
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implementsViewEvent()
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ImplementsEvent()
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}
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type X11ViewEvent struct {
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// Display is a pointer to the X11 Display created by XOpenDisplay.
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Display unsafe.Pointer
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// Window is the X11 window ID as returned by XCreateWindow.
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Window uintptr
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}
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func (X11ViewEvent) implementsViewEvent() {}
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func (X11ViewEvent) ImplementsEvent() {}
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type WaylandViewEvent struct {
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// Display is the *wl_display returned by wl_display_connect.
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Display unsafe.Pointer
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// Surface is the *wl_surface returned by wl_compositor_create_surface.
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Surface unsafe.Pointer
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}
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func (WaylandViewEvent) implementsViewEvent() {}
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func (WaylandViewEvent) ImplementsEvent() {}
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func osMain() {
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select {}
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}
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type windowDriver func(*callbacks, []Option) error
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// Instead of creating files with build tags for each combination of wayland +/- x11
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// let each driver initialize these variables with their own version of createWindow.
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var wlDriver, x11Driver windowDriver
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func newWindow(window *callbacks, options []Option) {
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var errFirst error
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for _, d := range []windowDriver{wlDriver, x11Driver} {
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if d == nil {
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continue
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}
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err := d(window, options)
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if err == nil {
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return
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}
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if errFirst == nil {
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errFirst = err
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}
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}
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window.SetDriver(&dummyDriver{
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win: window,
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wakeups: make(chan event.Event, 1),
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})
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if errFirst == nil {
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errFirst = errors.New("app: no window driver available")
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}
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window.ProcessEvent(DestroyEvent{Err: errFirst})
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}
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type dummyDriver struct {
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win *callbacks
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wakeups chan event.Event
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}
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func (d *dummyDriver) Event() event.Event {
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if e, ok := d.win.nextEvent(); ok {
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return e
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}
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return <-d.wakeups
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}
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func (d *dummyDriver) Invalidate() {
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select {
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case d.wakeups <- wakeupEvent{}:
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default:
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}
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}
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// xCursor contains mapping from pointer.Cursor to XCursor.
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var xCursor = [...]string{
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pointer.CursorDefault: "left_ptr",
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pointer.CursorNone: "",
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pointer.CursorText: "xterm",
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pointer.CursorVerticalText: "vertical-text",
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pointer.CursorPointer: "hand2",
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pointer.CursorCrosshair: "crosshair",
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pointer.CursorAllScroll: "fleur",
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pointer.CursorColResize: "sb_h_double_arrow",
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pointer.CursorRowResize: "sb_v_double_arrow",
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pointer.CursorGrab: "hand1",
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pointer.CursorGrabbing: "move",
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pointer.CursorNotAllowed: "crossed_circle",
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pointer.CursorWait: "watch",
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pointer.CursorProgress: "left_ptr_watch",
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pointer.CursorNorthWestResize: "top_left_corner",
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pointer.CursorNorthEastResize: "top_right_corner",
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pointer.CursorSouthWestResize: "bottom_left_corner",
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pointer.CursorSouthEastResize: "bottom_right_corner",
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pointer.CursorNorthSouthResize: "sb_v_double_arrow",
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pointer.CursorEastWestResize: "sb_h_double_arrow",
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pointer.CursorWestResize: "left_side",
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pointer.CursorEastResize: "right_side",
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pointer.CursorNorthResize: "top_side",
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pointer.CursorSouthResize: "bottom_side",
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pointer.CursorNorthEastSouthWestResize: "fd_double_arrow",
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pointer.CursorNorthWestSouthEastResize: "bd_double_arrow",
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}
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