Provide for the case when XCreateIC fails.

src/yinputline.cc

@@ -351,15 +351,27 @@ bool YInputLine::handleKey(const XKeyEvent &key) {
 }
 
 int YInputLine::getWCharFromEvent(const XKeyEvent& key, wchar_t* s, int maxLen) {
- KeySym keysym = None;
- Status status = None;
- int len = XwcLookupString(inputContext, const_cast<XKeyEvent*>(&key),
- s, maxLen, &keysym, &status);
-
- if (inrange(len, 0, maxLen - 1)) {
- s[len] = None;
+ if (inputContext) {
+ KeySym keysym = None;
+ Status status = None;
+ int len = XwcLookupString(inputContext, const_cast<XKeyEvent*>(&key),
+ s, maxLen, &keysym, &status);
+
+ if (inrange(len, 0, maxLen - 1)) {
+ s[len] = None;
+ }
+ return len;
+ } else {
+ int len = 0;
+ char buf[16];
+ if (getCharFromEvent(key, buf, 16)) {
+ for (; len + 1 < 16 && len + 1 < maxLen; ++len) {
+ s[len] = wchar_t(((unsigned char *) buf)[len]);
+ s[len + 1] = 0;
+ }
+ }
+ return len;
  }
- return len;
 }
 
 void YInputLine::handleButton(const XButtonEvent &button) {
@@ -894,16 +906,25 @@ void YInputLine::gotFocus() {
  XNClientWindow, handle(),
  XNFocusWindow, handle(),
  nullptr);
- unsigned long mask = None;
- XGetICValues(inputContext, XNFilterEvents, &mask, nullptr);
- if (mask) {
- addEventMask(mask);
+ if (inputContext == nullptr) {
+ if (ONCE)
+ warn("Cannot create input context with XCreateIC");
+ } else {
+ unsigned long mask = None;
+ const char* name = XGetICValues(inputContext,
+ XNFilterEvents, &mask, nullptr);
+ if (name) {
+ warn("XGetICValues fails for %s", name);
+ } else if (mask) {
+ addEventMask(mask);
+ }
+ eventFiltering(true);
  }
- eventFiltering(true);
  }
-
- XSetICFocus(inputContext);
- XwcResetIC(inputContext);
+ if (inputContext) {
+ XSetICFocus(inputContext);
+ XwcResetIC(inputContext);
+ }
 }
 
 void YInputLine::lostFocus() {