93 lines
3.1 KiB
Go
93 lines
3.1 KiB
Go
|
package xwindow
|
||
|
|
|
||
|
|
import (
|
||
|
|
"github.com/jezek/xgb/xproto"
|
||
|
|
|
||
|
|
"github.com/jezek/xgbutil"
|
||
|
|
"github.com/jezek/xgbutil/icccm"
|
||
|
|
"github.com/jezek/xgbutil/xevent"
|
||
|
|
)
|
||
|
|
|
||
|
|
// WMGracefulClose will do all the necessary setup to implement the
|
||
|
|
// WM_DELETE_WINDOW protocol. This will prevent well-behaving window managers
|
||
|
|
// from killing your client whenever one of your windows is closed. (Killing
|
||
|
|
// a client is bad because it will destroy your X connection and any other
|
||
|
|
// clients you have open.)
|
||
|
|
// You must provide a callback function that is called when the window manager
|
||
|
|
// asks you to close your window. (You may provide some means of confirmation
|
||
|
|
// to the user, i.e., "Do you really want to quit?", but you should probably
|
||
|
|
// just wrap things up and call DestroyWindow.)
|
||
|
|
func (w *Window) WMGracefulClose(cb func(w *Window)) {
|
||
|
|
// Get the current protocols so we don't overwrite anything.
|
||
|
|
prots, _ := icccm.WmProtocolsGet(w.X, w.Id)
|
||
|
|
|
||
|
|
// If WM_DELETE_WINDOW isn't here, add it. Otherwise, move on.
|
||
|
|
wmdelete := false
|
||
|
|
for _, prot := range prots {
|
||
|
|
if prot == "WM_DELETE_WINDOW" {
|
||
|
|
wmdelete = true
|
||
|
|
break
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if !wmdelete {
|
||
|
|
icccm.WmProtocolsSet(w.X, w.Id, append(prots, "WM_DELETE_WINDOW"))
|
||
|
|
}
|
||
|
|
|
||
|
|
// Attach a ClientMessage event handler. It will determine whether the
|
||
|
|
// ClientMessage is a 'close' request, and if so, run the callback 'cb'
|
||
|
|
// provided.
|
||
|
|
xevent.ClientMessageFun(
|
||
|
|
func(X *xgbutil.XUtil, ev xevent.ClientMessageEvent) {
|
||
|
|
if icccm.IsDeleteProtocol(X, ev) {
|
||
|
|
cb(w)
|
||
|
|
}
|
||
|
|
}).Connect(w.X, w.Id)
|
||
|
|
}
|
||
|
|
|
||
|
|
// WMTakeFocus will do all the necessary setup to support the WM_TAKE_FOCUS
|
||
|
|
// protocol using the "LocallyActive" input model described in Section 4.1.7
|
||
|
|
// of the ICCCM. Namely, listening to ClientMessage events and running the
|
||
|
|
// callback function provided when a WM_TAKE_FOCUS ClientMessage has been
|
||
|
|
// received.
|
||
|
|
//
|
||
|
|
// Typically, the callback function should include a call to SetInputFocus
|
||
|
|
// with the "Parent" InputFocus type, the sub-window id of the window that
|
||
|
|
// should have focus, and the 'tstamp' timestamp.
|
||
|
|
func (w *Window) WMTakeFocus(cb func(w *Window, tstamp xproto.Timestamp)) {
|
||
|
|
// Make sure the Input flag is set to true in WM_HINTS. We first
|
||
|
|
// must retrieve the current WM_HINTS, so we don't overwrite the flags.
|
||
|
|
curFlags := uint(0)
|
||
|
|
if hints, err := icccm.WmHintsGet(w.X, w.Id); err == nil {
|
||
|
|
curFlags = hints.Flags
|
||
|
|
}
|
||
|
|
icccm.WmHintsSet(w.X, w.Id, &icccm.Hints{
|
||
|
|
Flags: curFlags | icccm.HintInput,
|
||
|
|
Input: 1,
|
||
|
|
})
|
||
|
|
|
||
|
|
// Get the current protocols so we don't overwrite anything.
|
||
|
|
prots, _ := icccm.WmProtocolsGet(w.X, w.Id)
|
||
|
|
|
||
|
|
// If WM_TAKE_FOCUS isn't here, add it. Otherwise, move on.
|
||
|
|
wmfocus := false
|
||
|
|
for _, prot := range prots {
|
||
|
|
if prot == "WM_TAKE_FOCUS" {
|
||
|
|
wmfocus = true
|
||
|
|
break
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if !wmfocus {
|
||
|
|
icccm.WmProtocolsSet(w.X, w.Id, append(prots, "WM_TAKE_FOCUS"))
|
||
|
|
}
|
||
|
|
|
||
|
|
// Attach a ClientMessage event handler. It will determine whether the
|
||
|
|
// ClientMessage is a 'focus' request, and if so, run the callback 'cb'
|
||
|
|
// provided.
|
||
|
|
xevent.ClientMessageFun(
|
||
|
|
func(X *xgbutil.XUtil, ev xevent.ClientMessageEvent) {
|
||
|
|
if icccm.IsFocusProtocol(X, ev) {
|
||
|
|
cb(w, xproto.Timestamp(ev.Data.Data32[1]))
|
||
|
|
}
|
||
|
|
}).Connect(w.X, w.Id)
|
||
|
|
}
|