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app/internal/window: x11: fix issue with space not sending key.EditEvent

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This is a general fix where keys with names differing from their UTF8
representation could not be sent as EditEvents.

Signed-off-by: Denis Bernard <db047h@gmail.com>
This commit is contained in:
Denis Bernard
2019-11-09 16:05:57 +01:00
committed by Elias Naur
parent c8d01d99cc
commit a0050ab79b
1 changed files with 38 additions and 17 deletions
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app/internal/window/os_x11.go
+38 -17
View File
@@ -225,6 +225,8 @@ func (h *x11EventHandler) handleEvents() bool {
lookup:
// Save state then clear CTRL & Shift bits in order to have
// Xutf8LookupString return the unmodified key name in text[:l].
// This addresses an issue on some non US keyboard layouts where
// CTRL-[0..9] do not behave consistently.
//
// Note that this enables sending a key.Event for key combinations
// like CTRL-SHIFT-/ on QWERTY layouts, but CTRL-? is completely
@@ -247,24 +249,31 @@ func (h *x11EventHandler) handleEvents() bool {
w.w.Event(key.EditEvent{Text: string(h.text[:l])})
case C.XLookupKeySym:
// Special keys.
if r, ok := x11SpecialKeySymToRune(h.keysym); ok {
w.w.Event(key.Event{
Name: r,
Modifiers: mods,
})
if n, m, ok := x11ConvertKeysym(h.keysym, mods); ok {
w.w.Event(key.Event{Name: n, Modifiers: m})
}
case C.XLookupBoth:
if r, ok := x11SpecialKeySymToRune(h.keysym); ok {
w.w.Event(key.Event{Name: r, Modifiers: mods})
} else {
if r, _ := utf8.DecodeRune(h.text[:l]); r != utf8.RuneError {
w.w.Event(key.Event{Name: string(unicode.ToUpper(r)), Modifiers: mods})
}
// Send EditEvent only when not a CTRL key combination.
if !mods.Contain(key.ModCtrl) {
w.w.Event(key.EditEvent{Text: string(h.text[:l])})
if n, m, ok := x11ConvertKeysym(h.keysym, mods); ok {
w.w.Event(key.Event{Name: n, Modifiers: m})
}
// Do not send EditEvent for CTRL key combinations.
if mods.Contain(key.ModCtrl) {
break
}
// Report only printable runes.
str := h.text[:l]
for n := 0; n < len(str); {
r, s := utf8.DecodeRune(str)
if unicode.IsPrint(r) {
n += s
} else {
copy(str[n:], str[n+s:])
str = str[:len(str)-s]
}
}
if len(str) > 0 {
w.w.Event(key.EditEvent{Text: string(str)})
}
}
case C.KeyRelease:
case C.ButtonPress, C.ButtonRelease:
@@ -349,7 +358,16 @@ func x11KeyStateToModifiers(s C.uint) key.Modifiers {
return m
}
func x11SpecialKeySymToRune(s C.KeySym) (string, bool) {
// x11ConvertKeysym returns the Gio special key that matches keysym s. For
// portability reasons, some keysyms might be translated and modifiers changed
// (like BackTab -> ModShift+Tab)
func x11ConvertKeysym(s C.KeySym, mods key.Modifiers) (string, key.Modifiers, bool) {
if '0' <= s && s <= '9' || 'A' <= s && s <= 'Z' {
return string(s), mods, true
}
if 'a' <= s && s <= 'z' {
return string(s - 0x20), mods, true
}
var n string
switch s {
case C.XK_Escape:
@@ -402,14 +420,17 @@ func x11SpecialKeySymToRune(s C.KeySym) (string, bool) {
n = "F11"
case C.XK_F12:
n = "F12"
case C.XK_ISO_Left_Tab:
mods |= key.ModShift
fallthrough
case C.XK_Tab:
n = key.NameTab
case 0x20, C.XK_KP_Space:
n = "Space"
default:
return "", false
return "", mods, false
}
return n, true
return n, mods, true
}
var (