/**
* We want to return the menu item associated with the key, but if there is no ambiguity (i.e.
* there is only one menu item corresponding to the key) we want to return it even if it's not an
* exact match; this allow the user to _not_ use the ALT key for example, making the use of
* shortcuts slightly more user-friendly. An example is on the G1, '!' and '1' are on the same
* key, and in Gmail, Menu+1 will trigger Menu+! (the actual shortcut).
*
* <p>On the other hand, if two (or more) shortcuts corresponds to the same key, we have to only
* return the exact match.
*/
MenuItemImpl findItemWithShortcutForKey(int keyCode, KeyEvent event) {
// Get all items that can be associated directly or indirectly with the keyCode
ArrayList<MenuItemImpl> items = mTempShortcutItemList;
items.clear();
findItemsWithShortcutForKey(items, keyCode, event);
if (items.isEmpty()) {
return null;
}
final int metaState = event.getMetaState();
final KeyCharacterMap.KeyData possibleChars = new KeyCharacterMap.KeyData();
// Get the chars associated with the keyCode (i.e using any chording combo)
event.getKeyData(possibleChars);
// If we have only one element, we can safely returns it
final int size = items.size();
if (size == 1) {
return items.get(0);
}
final boolean qwerty = isQwertyMode();
// If we found more than one item associated with the key,
// we have to return the exact match
for (int i = 0; i < size; i++) {
final MenuItemImpl item = items.get(i);
final char shortcutChar = qwerty ? item.getAlphabeticShortcut() : item.getNumericShortcut();
if ((shortcutChar == possibleChars.meta[0] && (metaState & KeyEvent.META_ALT_ON) == 0)
|| (shortcutChar == possibleChars.meta[2] && (metaState & KeyEvent.META_ALT_ON) != 0)
|| (qwerty && shortcutChar == '\b' && keyCode == KeyEvent.KEYCODE_DEL)) {
return item;
}
}
return null;
}
/**
* This function will return all the menu and sub-menu items that can be directly (the shortcut
* directly corresponds) and indirectly (the ALT-enabled char corresponds to the shortcut)
* associated with the keyCode.
*/
void findItemsWithShortcutForKey(List<MenuItemImpl> items, int keyCode, KeyEvent event) {
final boolean qwerty = isQwertyMode();
final int metaState = event.getMetaState();
final KeyCharacterMap.KeyData possibleChars = new KeyCharacterMap.KeyData();
// Get the chars associated with the keyCode (i.e using any chording combo)
final boolean isKeyCodeMapped = event.getKeyData(possibleChars);
// The delete key is not mapped to '\b' so we treat it specially
if (!isKeyCodeMapped && (keyCode != KeyEvent.KEYCODE_DEL)) {
return;
}
// Look for an item whose shortcut is this key.
final int N = mItems.size();
for (int i = 0; i < N; i++) {
MenuItemImpl item = mItems.get(i);
if (item.hasSubMenu()) {
((MenuBuilder) item.getSubMenu()).findItemsWithShortcutForKey(items, keyCode, event);
}
final char shortcutChar = qwerty ? item.getAlphabeticShortcut() : item.getNumericShortcut();
if (((metaState & (KeyEvent.META_SHIFT_ON | KeyEvent.META_SYM_ON)) == 0)
&& (shortcutChar != 0)
&& (shortcutChar == possibleChars.meta[0]
|| shortcutChar == possibleChars.meta[2]
|| (qwerty && shortcutChar == '\b' && keyCode == KeyEvent.KEYCODE_DEL))
&& item.isEnabled()) {
items.add(item);
}
}
}