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Copy pathos_x11.go
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1061 lines (981 loc) · 27.9 KB
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// SPDX-License-Identifier: Unlicense OR MIT
//go:build ((linux && !android) || freebsd || openbsd) && !nox11
package app
/*
#cgo freebsd openbsd CFLAGS: -I/usr/X11R6/include -I/usr/local/include
#cgo freebsd openbsd LDFLAGS: -L/usr/X11R6/lib -L/usr/local/lib
#cgo freebsd openbsd LDFLAGS: -lX11 -lxkbcommon -lxkbcommon-x11 -lX11-xcb -lXcursor -lXfixes
#cgo linux pkg-config: x11 xkbcommon xkbcommon-x11 x11-xcb xcursor xfixes
#include <stdlib.h>
#include <locale.h>
#include <X11/Xlib.h>
#include <X11/Xatom.h>
#include <X11/Xutil.h>
#include <X11/Xresource.h>
#include <X11/XKBlib.h>
#include <X11/Xlib-xcb.h>
#include <X11/extensions/Xfixes.h>
#include <X11/Xcursor/Xcursor.h>
#include <xkbcommon/xkbcommon-x11.h>
*/
import "C"
import (
"errors"
"fmt"
"image"
"io"
"os"
"strconv"
"strings"
"sync"
"time"
"unicode/utf8"
"unsafe"
"gioui.org/f32"
"gioui.org/io/event"
"gioui.org/io/key"
"gioui.org/io/pointer"
"gioui.org/io/system"
"gioui.org/io/transfer"
"gioui.org/op"
"gioui.org/unit"
syscall "golang.org/x/sys/unix"
"gioui.org/app/internal/ibus"
"gioui.org/app/internal/xkb"
)
const (
_NET_WM_STATE_REMOVE = 0
_NET_WM_STATE_ADD = 1
)
type x11Window struct {
w *callbacks
x *C.Display
xkb *xkb.Context
xkbEventBase C.int
xw C.Window
ibus *ibus.IBus
atoms struct {
// "UTF8_STRING".
utf8string C.Atom
// "text/plain;charset=utf-8".
plaintext C.Atom
// "TARGETS"
targets C.Atom
// "CLIPBOARD".
clipboard C.Atom
// "PRIMARY".
primary C.Atom
// "x-kde-passwordManagerHint", offered for sensitive content.
passwordManagerHint C.Atom
// "CLIPBOARD_CONTENT", the clipboard destination property.
clipboardContent C.Atom
// "WM_DELETE_WINDOW"
evDelWindow C.Atom
// "ATOM"
atom C.Atom
// "GTK_TEXT_BUFFER_CONTENTS"
gtk_text_buffer_contents C.Atom
// "_NET_WM_NAME"
wmName C.Atom
// "_NET_WM_STATE"
wmState C.Atom
// "_NET_WM_STATE_FULLSCREEN"
wmStateFullscreen C.Atom
// "_NET_ACTIVE_WINDOW"
wmActiveWindow C.Atom
// _NET_WM_STATE_MAXIMIZED_HORZ
wmStateMaximizedHorz C.Atom
// _NET_WM_STATE_MAXIMIZED_VERT
wmStateMaximizedVert C.Atom
}
metric unit.Metric
notify struct {
read, write int
}
animating bool
pointerBtns pointer.Buttons
clipboard
10BC8
clipboardContent
cursor pointer.Cursor
config Config
closing *ClosingEvent
delivered *ClosingEvent
wakeups chan struct{}
dispatchFns chan func()
handler x11EventHandler
buf [100]byte
}
var (
newX11EGLContext func(w *x11Window) (context, error)
newX11VulkanContext func(w *x11Window) (context, error)
)
// X11 and Vulkan doesn't work reliably on NVIDIA systems.
// See https://gioui.org/issue/347.
const vulkanBuggy = true
func (w *x11Window) NewContext() (context, error) {
var firstErr error
if f := newX11VulkanContext; f != nil && !vulkanBuggy {
c, err := f(w)
if err == nil {
return c, nil
}
firstErr = err
}
if f := newX11EGLContext; f != nil {
c, err := f(w)
if err == nil {
return c, nil
}
firstErr = err
}
if firstErr != nil {
return nil, firstErr
}
return nil, errors.New("x11: no available GPU backends")
}
func (w *x11Window) SetAnimating(anim bool) {
w.animating = anim
}
func (w *x11Window) ReadClipboard() {
C.XDeleteProperty(w.x, w.xw, w.atoms.clipboardContent)
C.XConvertSelection(w.x, w.atoms.clipboard, w.atoms.utf8string, w.atoms.clipboardContent, w.xw, C.CurrentTime)
}
func (w *x11Window) WriteClipboard(c clipboardContent) {
w.clipboard = c
C.XSetSelectionOwner(w.x, w.atoms.clipboard, w.xw, C.CurrentTime)
C.XSetSelectionOwner(w.x, w.atoms.primary, w.xw, C.CurrentTime)
}
func (w *x11Window) Configure(options []Option) {
var shints C.XSizeHints
prev := w.config
cnf := w.config
cnf.apply(w.metric, options)
// Decorations are never disabled.
cnf.Decorated = true
switch cnf.Mode {
case Fullscreen:
switch prev.Mode {
case Fullscreen:
case Minimized:
w.raise()
fallthrough
default:
w.config.Mode = Fullscreen
w.sendWMStateEvent(_NET_WM_STATE_ADD, w.atoms.wmStateFullscreen, 0)
}
case Minimized:
switch prev.Mode {
case Minimized, Fullscreen:
default:
w.config.Mode = Minimized
screen := C.XDefaultScreen(w.x)
C.XIconifyWindow(w.x, w.xw, screen)
}
case Maximized:
switch prev.Mode {
case Fullscreen:
case Minimized:
w.raise()
fallthrough
default:
w.config.Mode = Maximized
w.sendWMStateEvent(_NET_WM_STATE_ADD, w.atoms.wmStateMaximizedHorz, w.atoms.wmStateMaximizedVert)
w.setTitle(prev, cnf)
}
case Windowed:
switch prev.Mode {
case Fullscreen:
w.config.Mode = Windowed
w.sendWMStateEvent(_NET_WM_STATE_REMOVE, w.atoms.wmStateFullscreen, 0)
C.XResizeWindow(w.x, w.xw, C.uint(cnf.Size.X), C.uint(cnf.Size.Y))
case Minimized:
w.config.Mode = Windowed
w.raise()
case Maximized:
w.config.Mode = Windowed
w.sendWMStateEvent(_NET_WM_STATE_REMOVE, w.atoms.wmStateMaximizedHorz, w.atoms.wmStateMaximizedVert)
}
w.setTitle(prev, cnf)
if prev.Size != cnf.Size {
w.config.Size = cnf.Size
C.XResizeWindow(w.x, w.xw, C.uint(cnf.Size.X), C.uint(cnf.Size.Y))
}
if prev.MinSize != cnf.MinSize {
w.config.MinSize = cnf.MinSize
shints.min_width = C.int(cnf.MinSize.X)
shints.min_height = C.int(cnf.MinSize.Y)
shints.flags = C.PMinSize
}
if prev.MaxSize != cnf.MaxSize {
w.config.MaxSize = cnf.MaxSize
shints.max_width = C.int(cnf.MaxSize.X)
shints.max_height = C.int(cnf.MaxSize.Y)
shints.flags = shints.flags | C.PMaxSize
}
if shints.flags != 0 {
C.XSetWMNormalHints(w.x, w.xw, &shints)
}
}
if cnf.Decorated != prev.Decorated {
w.config.Decorated = cnf.Decorated
}
w.ProcessEvent(ConfigEvent{Config: w.config})
}
func (w *x11Window) setTitle(prev, cnf Config) {
if prev.Title != cnf.Title {
title := cnf.Title
ctitle := C.CString(title)
defer C.free(unsafe.Pointer(ctitle))
C.XStoreName(w.x, w.xw, ctitle)
// set _NET_WM_NAME as well for UTF-8 support in window title.
C.XSetTextProperty(w.x, w.xw,
&C.XTextProperty{
value: (*C.uchar)(unsafe.Pointer(ctitle)),
encoding: w.atoms.utf8string,
format: 8,
nitems: C.ulong(len(title)),
},
w.atoms.wmName)
}
}
func (w *x11Window) Perform(acts system.Action) {
walkActions(acts, func(a system.Action) {
switch a {
case system.ActionCenter:
w.center()
case system.ActionRaise:
w.raise()
}
})
if acts&system.ActionClose != 0 {
w.close()
}
}
func (w *x11Window) center() {
screen := C.XDefaultScreen(w.x)
width := C.XDisplayWidth(w.x, screen)
height := C.XDisplayHeight(w.x, screen)
var attrs C.XWindowAttributes
C.XGetWindowAttributes(w.x, w.xw, &attrs)
width -= attrs.border_width
height -= attrs.border_width
sz := w.config.Size
x := (int(width) - sz.X) / 2
y := (int(height) - sz.Y) / 2
C.XMoveResizeWindow(w.x, w.xw, C.int(x), C.int(y), C.uint(sz.X), C.uint(sz.Y))
}
func (w *x11Window) raise() {
var xev C.XEvent
ev := (*C.XClientMessageEvent)(unsafe.Pointer(&xev))
*ev = C.XClientMessageEvent{
_type: C.ClientMessage,
display: w.x,
window: w.xw,
message_type: w.atoms.wmActiveWindow,
format: 32,
}
C.XSendEvent(
w.x,
C.XDefaultRootWindow(w.x), // MUST be the root window
C.False,
C.SubstructureNotifyMask|C.SubstructureRedirectMask,
&xev,
)
C.XMapRaised(w.display(), w.xw)
}
func (w *x11Window) SetCursor(cursor pointer.Cursor) {
if cursor == pointer.CursorNone {
w.cursor = cursor
C.XFixesHideCursor(w.x, w.xw)
return
}
xcursor := xCursor[cursor]
cname := C.CString(xcursor)
defer C.free(unsafe.Pointer(cname))
c := C.XcursorLibraryLoadCursor(w.x, cname)
if c == 0 {
cursor = pointer.CursorDefault
}
w.cursor = cursor
// If c if null (i.e. cursor was not found),
// XDefineCursor will use the default cursor.
C.XDefineCursor(w.x, w.xw, c)
}
func (w *x11Window) ShowTextInput(show bool) {}
func (w *x11Window) SetInputHint(_ key.InputHint) {}
func (w *x11Window) EditorStateChanged(old, new editorState) {
if shouldCancelComposition(old, new) {
w.ibus.Reset()
w.w.SetComposingRegion(key.Range{-1, -1})
}
}
// close asks the event loop to process a close request.
func (w *x11Window) close() {
var xev C.XEvent
ev := (*C.XClientMessageEvent)(unsafe.Pointer(&xev))
*ev = C.XClientMessageEvent{
_type: C.ClientMessage,
display: w.x,
window: w.xw,
message_type: w.atom("WM_PROTOCOLS", true),
format: 32,
}
arr := (*[5]C.long)(unsafe.Pointer(&ev.data))
arr[0] = C.long(w.atoms.evDelWindow)
arr[1] = C.CurrentTime
w.ibus.Stop()
C.XSendEvent(w.x, w.xw, C.False, C.NoEventMask, &xev)
}
// action is one of _NET_WM_STATE_REMOVE, _NET_WM_STATE_ADD.
func (w *x11Window) sendWMStateEvent(action C.long, atom1, atom2 C.ulong) {
var xev C.XEvent
ev := (*C.XClientMessageEvent)(unsafe.Pointer(&xev))
*ev = C.XClientMessageEvent{
_type: C.ClientMessage,
display: w.x,
window: w.xw,
message_type: w.atoms.wmState,
format: 32,
}
data := (*[5]C.long)(unsafe.Pointer(&ev.data))
data[0] = C.long(action)
data[1] = C.long(atom1)
data[2] = C.long(atom2)
data[3] = 1 // application
C.XSendEvent(
w.x,
C.XDefaultRootWindow(w.x), // MUST be the root window
C.False,
C.SubstructureNotifyMask|C.SubstructureRedirectMask,
&xev,
)
}
var x11OneByte = make([]byte, 1)
func (w *x11Window) ProcessEvent(e event.Event) {
w.w.ProcessEvent(e)
}
func (w *x11Window) shutdown(err error) {
w.ProcessEvent(X11ViewEvent{})
w.ProcessEvent(DestroyEvent{Err: err})
w.destroy()
}
func (w *x11Window) Event() event.Event {
for {
if w.delivered != nil {
e := w.delivered
w.delivered = nil
if !e.abort {
w.shutdown(nil)
}
}
evt, ok := w.w.nextEvent()
if !ok {
w.dispatch()
continue
}
if e, ok := evt.(*ClosingEvent); ok && e == w.closing {
w.delivered = w.closing
w.closing = nil
}
return evt
}
}
func (w *x11Window) Run(f func()) {
f()
}
func (w *x11Window) Frame(frame *op.Ops) {
w.w.ProcessFrame(frame, nil)
}
func (w *x11Window) Invalidate() {
select {
case w.wakeups <- struct{}{}:
default:
}
w.invalidate()
}
func (w *x11Window) invalidate() {
if _, err := syscall.Write(w.notify.write, x11OneByte); err != nil && err != syscall.EAGAIN {
panic(fmt.Errorf("failed to write to pipe: %v", err))
}
}
func (w *x11Window) display() *C.Display {
return w.x
}
func (w *x11Window) window() (C.Window, int, int) {
return w.xw, w.config.Size.X, w.config.Size.Y
}
func (w *x11Window) dispatch() {
if w.x == nil {
// Only Invalidate can wake us up.
<-w.wakeups
w.w.Invalidate()
return
}
select {
case <-w.wakeups:
w.w.Invalidate()
default:
}
dispatchFnsLoop:
for {
select {
case fn := <-w.dispatchFns:
fn()
default:
break dispatchFnsLoop
}
}
xfd := C.XConnectionNumber(w.x)
// Poll for events and notifications.
pollfds := []syscall.PollFd{
{Fd: int32(xfd), Events: syscall.POLLIN | syscall.POLLERR},
{Fd: int32(w.notify.read), Events: syscall.POLLIN | syscall.POLLERR},
}
xEvents := &pollfds[0].Revents
// Plenty of room for a backlog of notifications.
var syn, anim bool
// Check for pending draw events before checking animation or blocking.
// This fixes an issue on Xephyr where on startup XPending() > 0 but
// poll will still block. This also prevents no-op calls to poll.
syn = w.handler.handleEvents()
if w.x == nil {
// handleEvents received a close request and destroyed the window.
return
}
if !syn {
anim = w.animating
if !anim {
// Clear poll events.
*xEvents = 0
// Wait for X event or gio notification.
if _, err := syscall.Poll(pollfds, -1); err != nil && err != syscall.EINTR {
panic(fmt.Errorf("x11 loop: poll failed: %w", err))
}
switch {
case *xEvents&syscall.POLLIN != 0:
syn = w.handler.handleEvents()
if w.x == nil {
return
}
case *xEvents&(syscall.POLLERR|syscall.POLLHUP) != 0:
}
}
}
// Clear notifications.
for {
_, err := syscall.Read(w.notify.read, w.buf[:])
if err == syscall.EAGAIN {
break
}
if err != nil {
panic(fmt.Errorf("x11 loop: read from notify pipe failed: %w", err))
}
}
if (anim || syn) && w.config.Size.X != 0 && w.config.Size.Y != 0 {
w.ProcessEvent(frameEvent{
FrameEvent: FrameEvent{
Now: time.Now(),
Size: w.config.Size,
Metric: w.metric,
},
Sync: syn,
})
}
}
func (w *x11Window) destroy() {
if w.notify.write != 0 {
syscall.Close(w.notify.write)
w.notify.write = 0
}
if w.notify.read != 0 {
syscall.Close(w.notify.read)
w.notify.read = 0
}
if w.xkb != nil {
w.xkb.Destroy()
w.xkb = nil
}
w.ibus.Stop()
C.XDestroyWindow(w.x, w.xw)
C.XCloseDisplay(w.x)
w.x = nil
}
// atom is a wrapper around XInternAtom. Callers should cache the result
// in order to limit round-trips to the X server.
func (w *x11Window) atom(name string, onlyIfExists bool) C.Atom {
cname := C.CString(name)
defer C.free(unsafe.Pointer(cname))
flag := C.Bool(C.False)
if onlyIfExists {
flag = C.True
}
return C.XInternAtom(w.x, cname, flag)
}
// x11EventHandler wraps static variables for the main event loop.
// Its sole purpose is to prevent heap allocation and reduce clutter
// in x11window.loop.
type x11EventHandler struct {
w *x11Window
text []byte
xev *C.XEvent
}
// handleEvents returns true if the window needs to be redrawn.
func (h *x11EventHandler) handleEvents() bool {
w := h.w
xev := h.xev
redraw := false
for C.XPending(w.x) != 0 {
C.XNextEvent(w.x, xev)
if C.XFilterEvent(xev, C.None) == C.True {
continue
}
switch _type := (*C.XAnyEvent)(unsafe.Pointer(xev))._type; _type {
case h.w.xkbEventBase:
xkbEvent := (*C.XkbAnyEvent)(unsafe.Pointer(xev))
switch xkbEvent.xkb_type {
case C.XkbNewKeyboardNotify, C.XkbMapNotify:
if err := h.w.updateXkbKeymap(); err != nil {
panic(err)
}
case C.XkbStateNotify:
state := (*C.XkbStateNotifyEvent)(unsafe.Pointer(xev))
h.w.xkb.UpdateMask(uint32(state.base_mods), uint32(state.latched_mods), uint32(state.locked_mods),
uint32(state.base_group), uint32(state.latched_group), uint32(state.locked_group))
}
case C.KeyPress, C.KeyRelease:
ks := key.Press
if _type == C.KeyRelease {
ks = key.Release
}
kevt := (*C.XKeyPressedEvent)(unsafe.Pointer(xev))
sym, events := h.w.xkb.DispatchKey(uint32(kevt.keycode), ks)
handledByIME := false
if _type == C.KeyPress {
handledByIME = w.ibus.ProcessKey(sym, uint32(kevt.keycode), uint32(kevt.state))
if handledByIME {
// Update IME cursor position
sel := w.w.EditorState().Selection
top := sel.Transform.Transform(sel.Caret.Pos.Add(f32.Pt(0, -sel.Caret.Ascent)))
bottom := sel.Transform.Transform(sel.Caret.Pos.Add(f32.Pt(0, sel.Caret.Descent)))
var pos image.Rectangle
pos.Min = image.Pt(int(top.X+.5), int(top.Y+.5))
pos.Max = image.Pt(int(bottom.X+.5), int(bottom.Y+.5))
if pos.Max.Y <= pos.Min.Y {
pos.Max.Y = pos.Min.Y + 1
}
if pos.Max.X <= pos.Min.X {
pos.Max.X = pos.Min.X + 1
}
root := C.XDefaultRootWindow(w.x)
var dstX, dstY C.int
var childReturn C.Window
C.XTranslateCoordinates(w.x, w.xw, root, 0, 0, &dstX, &dstY, &childReturn)
_ = childReturn
pos.Min.X += int(dstX)
pos.Min.Y += int(dstY)
pos.Max.X += int(dstX)
pos.Max.Y += int(dstY)
w.ibus.SetCursorLocation(pos)
}
}
if !handledByIME {
for _, e := range events {
if ee, ok := e.(key.EditEvent); ok {
w.w.EditorInsert(ee.Text)
} else {
w.ProcessEvent(e)
}
}
}
case C.ButtonPress, C.ButtonRelease:
bevt := (*C.XButtonEvent)(unsafe.Pointer(xev))
ev := pointer.Event{
Kind: pointer.Press,
Source: pointer.Mouse,
Position: f32.Point{
X: float32(bevt.x),
Y: float32(bevt.y),
},
Time: time.Duration(bevt.time) * time.Millisecond,
Modifiers: w.xkb.Modifiers(),
}
if bevt._type == C.ButtonRelease {
ev.Kind = pointer.Release
}
var btn pointer.Buttons
const scrollScale = 10
switch bevt.button {
ca
10BC8
se C.Button1:
btn = pointer.ButtonPrimary
case C.Button2:
btn = pointer.ButtonTertiary
case C.Button3:
btn = pointer.ButtonSecondary
case C.Button4:
ev.Kind = pointer.Scroll
// scroll up or left (if shift is pressed).
if ev.Modifiers == key.ModShift {
ev.Scroll.X = -scrollScale
} else {
ev.Scroll.Y = -scrollScale
}
case C.Button5:
// scroll down or right (if shift is pressed).
ev.Kind = pointer.Scroll
if ev.Modifiers == key.ModShift {
ev.Scroll.X = +scrollScale
} else {
ev.Scroll.Y = +scrollScale
}
case 6:
// http://xahlee.info/linux/linux_x11_mouse_button_number.html
// scroll left.
ev.Kind = pointer.Scroll
ev.Scroll.X = -scrollScale * 2
case 7:
// scroll right
ev.Kind = pointer.Scroll
ev.Scroll.X = +scrollScale * 2
case 8:
btn = pointer.ButtonQuaternary
case 9:
btn = pointer.ButtonQuinary
default:
continue
}
switch _type {
case C.ButtonPress:
w.pointerBtns |= btn
case C.ButtonRelease:
w.pointerBtns &^= btn
}
ev.Buttons = w.pointerBtns
w.ProcessEvent(ev)
case C.MotionNotify:
mevt := (*C.XMotionEvent)(unsafe.Pointer(xev))
w.ProcessEvent(pointer.Event{
Kind: pointer.Move,
Source: pointer.Mouse,
Buttons: w.pointerBtns,
Position: f32.Point{
X: float32(mevt.x),
Y: float32(mevt.y),
},
Time: time.Duration(mevt.time) * time.Millisecond,
Modifiers: w.xkb.Modifiers(),
})
case C.Expose: // update
// redraw only on the last expose event
redraw = (*C.XExposeEvent)(unsafe.Pointer(xev)).count == 0
case C.FocusIn:
w.config.Focused = true
w.ProcessEvent(ConfigEvent{Config: w.config})
w.ibus.Focused(true)
case C.FocusOut:
w.config.Focused = false
w.ProcessEvent(ConfigEvent{Config: w.config})
w.ibus.Focused(false)
case C.ConfigureNotify: // window configuration change
cevt := (*C.XConfigureEvent)(unsafe.Pointer(xev))
if sz := image.Pt(int(cevt.width), int(cevt.height)); sz != w.config.Size {
w.config.Size = sz
w.ProcessEvent(ConfigEvent{Config: w.config})
}
// redraw will be done by a later expose event
case C.SelectionNotify:
cevt := (*C.XSelectionEvent)(unsafe.Pointer(xev))
prop := w.atoms.clipboardContent
if cevt.property != prop {
break
}
if cevt.selection != w.atoms.clipboard {
break
}
var text C.XTextProperty
if st := C.XGetTextProperty(w.x, w.xw, &text, prop); st == 0 {
// Failed; ignore.
break
}
if text.format != 8 || text.encoding != w.atoms.utf8string {
// Ignore non-utf-8 encoded strings.
break
}
str := C.GoStringN((*C.char)(unsafe.Pointer(text.value)), C.int(text.nitems))
w.ProcessEvent(transfer.DataEvent{
Type: "application/text",
Open: func() io.ReadCloser {
return io.NopCloser(strings.NewReader(str))
},
})
case C.SelectionRequest:
cevt := (*C.XSelectionRequestEvent)(unsafe.Pointer(xev))
if (cevt.selection != w.atoms.clipboard && cevt.selection != w.atoms.primary) || cevt.property == C.None {
// Unsupported clipboard or obsolete requestor.
break
}
notify := func() {
var xev C.XEvent
ev := (*C.XSelectionEvent)(unsafe.Pointer(&xev))
*ev = C.XSelectionEvent{
_type: C.SelectionNotify,
display: cevt.display,
requestor: cevt.requestor,
selection: cevt.selection,
target: cevt.target,
property: cevt.property,
time: cevt.time,
}
C.XSendEvent(w.x, cevt.requestor, 0, 0, &xev)
}
switch cevt.target {
case w.atoms.targets:
// The requestor wants the supported clipboard
// formats. First write the targets...
formats := []C.long{C.long(w.atoms.targets)}
// The hint comes before the content, like the
// markers on the other platforms.
if w.clipboard.sensitive {
formats = append(formats, C.long(w.atoms.passwordManagerHint))
}
formats = append(formats,
C.long(w.atoms.utf8string),
C.long(w.atoms.plaintext),
// GTK clients need this.
C.long(w.atoms.gtk_text_buffer_contents),
)
C.XChangeProperty(w.x, cevt.requestor, cevt.property, w.atoms.atom,
32 /* bitwidth of formats */, C.PropModeReplace,
(*C.uchar)(unsafe.Pointer(unsafe.SliceData(formats))), C.int(len(formats)),
)
// ...then notify the requestor.
notify()
case w.atoms.plaintext, w.atoms.utf8string, w.atoms.gtk_text_buffer_contents:
content := w.clipboard.data
ptr := (*C.uchar)(unsafe.Pointer(unsafe.SliceData(content)))
C.XChangeProperty(w.x, cevt.requestor, cevt.property, cevt.target,
8 /* bitwidth */, C.PropModeReplace,
ptr, C.int(len(content)),
)
notify()
case w.atoms.passwordManagerHint:
if !w.clipboard.sensitive {
break
}
hint := []byte(passwordManagerHintValue)
C.XChangeProperty(w.x, cevt.requestor, cevt.property, cevt.target,
8 /* bitwidth */, C.PropModeReplace,
(*C.uchar)(unsafe.Pointer(unsafe.SliceData(hint))), C.int(len(hint)),
)
notify()
}
case C.ClientMessage: // extensions
cevt := (*C.XClientMessageEvent)(unsafe.Pointer(xev))
switch *(*C.long)(unsafe.Pointer(&cevt.data)) {
case C.long(w.atoms.evDelWindow):
if w.closing != nil {
return true
}
e := &ClosingEvent{}
w.closing = e
w.ProcessEvent(e)
return true
}
}
}
return redraw
}
var x11Threads sync.Once
func init() {
x11Driver = newX11Window
}
func newX11Window(gioWin *callbacks, options []Option) error {
var err error
pipe := make([]int, 2)
if err := syscall.Pipe2(pipe, syscall.O_NONBLOCK|syscall.O_CLOEXEC); err != nil {
return fmt.Errorf("NewX11Window: failed to create pipe: %w", err)
}
x11Threads.Do(func() {
if C.XInitThreads() == 0 {
err = errors.New("x11: threads init failed")
}
C.XrmInitialize()
})
if err != nil {
return err
}
dpy := C.XOpenDisplay(nil)
if dpy == nil {
return errors.New("x11: cannot connect to the X server")
}
var major, minor C.int = C.XkbMajorVersion, C.XkbMinorVersion
var xkbEventBase C.int
if C.XkbQueryExtension(dpy, nil, &xkbEventBase, nil, &major, &minor) != C.True {
C.XCloseDisplay(dpy)
return errors.New("x11: XkbQueryExtension failed")
}
const bits = C.uint(C.XkbNewKeyboardNotifyMask | C.XkbMapNotifyMask | C.XkbStateNotifyMask)
if C.XkbSelectEvents(dpy, C.XkbUseCoreKbd, bits, bits) != C.True {
C.XCloseDisplay(dpy)
return errors.New("x11: XkbSelectEvents failed")
}
xkb, err := xkb.New()
if err != nil {
C.XCloseDisplay(dpy)
return fmt.Errorf("x11: %v", err)
}
ppsp := x11DetectUIScale(dpy)
cfg := unit.Metric{PxPerDp: ppsp, PxPerSp: ppsp}
// Only use cnf for getting the window size.
var cnf Config
cnf.apply(cfg, options)
swa := C.XSetWindowAttributes{
event_mask: C.ExposureMask | C.FocusChangeMask | // update
C.KeyPressMask | C.KeyReleaseMask | // keyboard
C.ButtonPressMask | C.ButtonReleaseMask | // mouse clicks
C.PointerMotionMask | // mouse movement
C.StructureNotifyMask, // resize
background_pixmap: C.None,
override_redirect: C.False,
}
win := C.XCreateWindow(dpy, C.XDefaultRootWindow(dpy),
0, 0, C.uint(cnf.Size.X), C.uint(cnf.Size.Y),
0, C.CopyFromParent, C.InputOutput, nil,
C.CWEventMask|C.CWBackPixmap|C.CWOverrideRedirect, &swa)
w := &x11Window{
w: gioWin, x: dpy, xw: win,
metric: cfg,
xkb: xkb,
xkbEventBase: xkbEventBase,
wakeups: make(chan struct{}, 1),
dispatchFns: make(chan func(), 20),
config: Config{Size: cnf.Size},
}
w.handler = x11EventHandler{w: w, xev: new(C.XEvent), text: make([]byte, 4)}
w.notify.read = pipe[0]
w.notify.write = pipe[1]
w.w.SetDriver(w)
if err := w.updateXkbKeymap(); err != nil {
w.destroy()
return err
}
var hints C.XWMHints
hints.input = C.True
hints.flags = C.InputHint
C.XSetWMHints(dpy, win, &hints)
name := C.CString(ID)
defer C.free(unsafe.Pointer(name))
wmhints := C.XClassHint{name, name}
C.XSetClassHint(dpy, win, &wmhints)
w.atoms.utf8string = w.atom("UTF8_STRING", false)
w.atoms.plaintext = w.atom("text/plain;charset=utf-8", false)
w.atoms.gtk_text_buffer_contents = w.atom("GTK_TEXT_BUFFER_CONTENTS", false)
w.atoms.evDelWindow = w.atom("WM_DELETE_WINDOW", false)
w.atoms.clipboard = w.atom("CLIPBOARD", false)
w.atoms.primary = w.atom("PRIMARY", false)
w.atoms.clipboardContent = w.atom("CLIPBOARD_CONTENT", false)
w.atoms.atom = w.atom("ATOM", false)
w.atoms.targets = w.atom("TARGETS", false)
w.atoms.passwordManagerHint = w.atom(passwordManagerHintType, false)
w.atoms.wmName = w.atom("_NET_WM_NAME", false)
w.atoms.wmState = w.atom("_NET_WM_STATE", false)
w.atoms.wmStateFullscreen = w.atom("_NET_WM_STATE_FULLSCREEN", false)
w.atoms.wmActiveWindow = w.atom("_NET_ACTIVE_WINDOW", false)
w.atoms.wmStateMaximizedHorz = w.atom("_NET_WM_STATE_MAXIMIZED_HORZ", false)
w.atoms.wmStateMaximizedVert = w.atom("_NET_WM_STATE_MAXIMIZED_VERT", false)
// extensions
C.XSetWMProtocols(dpy, win, &w.atoms.evDelWindow, 1)
// IBus IME
if strings.Contains(os.Getenv("XMODIFIERS"), "@im=ibus") {
w.ibus, _ = ibus.Start(C.GoString(C.XDisplayString(dpy)), (*ibusEventHandler)(w))
}
// make the window visible on the screen
C.XMapWindow(dpy, win)
w.Configure(options)
w.ProcessEvent(X11ViewEvent{Display: unsafe.Pointer(dpy), Window: uintptr(win)})
return nil
}
// detectUIScale reports the system UI scale, or 1.0 if it fails.
func x11DetectUIScale(dpy *C.Display) float32 {
// default fixed DPI value used in most desktop UI toolkits
const defaultDesktopDPI = 96
var scale float32 = 1.0
// Get actual DPI from X resource Xft.dpi (set by GTK and Qt).
// This value is entirely based on user preferences and conflates both
// screen (UI) scaling and font scale.
rms := C.XResourceManagerString(dpy)
if rms != nil {
db := C.XrmGetStringDatabase(rms)
if db != nil {
var (
t *C.char
v C.XrmValue
)
if C.XrmGetResource(db, (*C.char)(unsafe.Pointer(unsafe.StringData("Xft.dpi\x00"))),
(*C.char)(unsafe.Pointer(unsafe.StringData("Xft.Dpi\x00"))), &t, &v) != C.False {
if t != nil && C.GoString(t) == "String" {
f, err := strconv.ParseFloat(C.GoString(v.addr), 32)
if err == nil {
scale = float32(f) / defaultDesktopDPI
}
}
}
C.XrmDestroyDatabase(db)
}
}