forked from joejulian/gio
Chris Waldon
7204632c39
This commit changes the definition of app.ViewEvent on Unix systems to be an interface implemented by two different concrete types: X11ViewEvent and WaylandViewEvent. Each provides the necessary fields for custom rendering on its display protocol. This is a breaking change for all users of app.ViewEvent on Linux/BSD, as it now is an interface instead of a concrete type. Signed-off-by: Chris Waldon <christopher.waldon.dev@gmail.com>
69 lines
1.6 KiB
Go
69 lines
1.6 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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)
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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) error {
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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 nil
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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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if errFirst != nil {
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return errFirst
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}
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return errors.New("app: no window driver available")
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}
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