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js: Use KeyboardEvent.key for ASCII keystrokes

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This requires passing in KeyboardEvent.location from JavaScript so
that we can detect the numeric keypad properly.  Out of caution we
currently only set MOD_NUM_KEYPAD on numbers, like we always have,
but we have enough information to set it on arrow keys, Enter, "+",
etc.

This finally gets '/' and '\' working in Slant again.
This commit is contained in:
Ben Harris
2022-10-24 23:06:12 +01:00
parent 0db5fb525b
commit 768ef770a3
2 changed files with 16 additions and 4 deletions
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14
emcc.c
View File

@ -262,9 +262,14 @@ void mousemove(int x, int y, int buttons)
/*
* Keyboard handler called from JS.
*/
void key(int keycode, const char *key, const char *chr,
void key(int keycode, const char *key, const char *chr, int location,
bool shift, bool ctrl)
{
/* Key location constants from JavaScript. */
#define DOM_KEY_LOCATION_STANDARD 0
#define DOM_KEY_LOCATION_LEFT 1
#define DOM_KEY_LOCATION_RIGHT 2
#define DOM_KEY_LOCATION_NUMPAD 3
int keyevent = -1;
if (!strnullcmp(key, "Backspace") || !strnullcmp(key, "Delete") ||
@ -296,6 +301,9 @@ void key(int keycode, const char *key, const char *chr,
keyevent = MOD_NUM_KEYPAD | '7';
else if (!strnullcmp(key, "PageUp"))
keyevent = MOD_NUM_KEYPAD | '9';
else if (key && (unsigned char)key[0] < 0x80 && key[1] == '\0')
/* Key generating a single ASCII character. */
keyevent = key[0];
else if (keycode == 8 || keycode == 46)
keyevent = 127; /* Backspace / Delete */
else if (keycode == 13)
@ -340,6 +348,10 @@ void key(int keycode, const char *key, const char *chr,
keyevent &= 0x1F;
}
if ('0' <= keyevent && keyevent <= '9' &&
location == DOM_KEY_LOCATION_NUMPAD)
keyevent |= MOD_NUM_KEYPAD;
midend_process_key(me, 0, 0, keyevent);
update_undo_redo();
}

6
emccpre.js
View File

@ -311,10 +311,10 @@ function initPuzzle() {
// the puzzle - so users of this puzzle collection in other media
// can indulge their instinct to press ^R for redo, for example,
// without accidentally reloading the page.
key = Module.cwrap('key', 'void', ['number', 'string',
'string', 'number', 'number']);
key = Module.cwrap('key', 'void', ['number', 'string', 'string',
'number', 'number', 'number']);
onscreen_canvas.onkeydown = function(event) {
key(event.keyCode, event.key, event.char,
key(event.keyCode, event.key, event.char, event.location,
event.shiftKey ? 1 : 0, event.ctrlKey ? 1 : 0);
event.preventDefault();
};