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Add fallback to legacy KeyboardEvent in web export 

Fallback to KeyboardEvent property `charCode` is absence of both `key`
and `char` for retrieval of unicode value.

(cherry picked from commit 45b90f16ca)
This commit is contained in:
eska 2016-04-19 14:15:20 +02:00 committed by Rémi Verschelde
parent 4c358b7043
commit 0f47311610
1 changed files with 21 additions and 1 deletions
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22
platform/javascript/os_javascript.cpp
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@ -99,14 +99,30 @@ static InputEvent _setup_key_event(const EmscriptenKeyboardEvent *emscripten_eve
return ev;
}
static InputEvent deferred_key_event;
static EM_BOOL _keydown_callback(int event_type, const EmscriptenKeyboardEvent *key_event, void *user_data) {
ERR_FAIL_COND_V(event_type!=EMSCRIPTEN_EVENT_KEYDOWN, false);
InputEvent ev = _setup_key_event(key_event);
ev.key.pressed = true;
if (ev.key.unicode==0 && keycode_has_unicode(ev.key.scancode)) {
// defer to keypress event for legacy unicode retrieval
deferred_key_event = ev;
return false; // do not suppress keypress event
}
static_cast<OS_JavaScript*>(user_data)->push_input(ev);
return ev.key.scancode!=KEY_UNKNOWN && ev.key.scancode!=0;
return true;
}
static EM_BOOL _keypress_callback(int event_type, const EmscriptenKeyboardEvent *key_event, void *user_data) {
ERR_FAIL_COND_V(event_type!=EMSCRIPTEN_EVENT_KEYPRESS, false);
deferred_key_event.key.unicode = key_event->charCode;
static_cast<OS_JavaScript*>(user_data)->push_input(deferred_key_event);
return true;
}
static EM_BOOL _keyup_callback(int event_type, const EmscriptenKeyboardEvent *key_event, void *user_data) {
@ -198,6 +214,10 @@ void OS_JavaScript::initialize(const VideoMode& p_desired,int p_video_driver,int
if (result!=EMSCRIPTEN_RESULT_SUCCESS) {
ERR_PRINTS( "Error while setting Emscripten keydown callback: Code " + itos(result) );
}
result = emscripten_set_keypress_callback(NULL, this, true, &_keypress_callback);
if (result!=EMSCRIPTEN_RESULT_SUCCESS) {
ERR_PRINTS( "Error while setting Emscripten keypress callback: Code " + itos(result) );
}
result = emscripten_set_keyup_callback(NULL, this, true, &_keyup_callback);
if (result!=EMSCRIPTEN_RESULT_SUCCESS) {
ERR_PRINTS( "Error while setting Emscripten keyup callback: Code " + itos(result) );