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Implement support for ALT and SHIFT modifiers

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The spec for keymaps and keboard input at
http://source.android.com/porting/keymaps_keyboard_input.html
mentions the stand alone ALT and SHIFT modifiers:

SHIFT: While pressed, the shift key modifier is set
ALT: While pressed, the alt key modifier is set

This commit implements support for these.

Change-Id: I5854ef3df541740cc3443b474a9c41183eb7561c
Ex: key 305   BACK  ALT
This commit is contained in:
Johan Redestig 2011-02-25 16:45:17 +01:00
parent 5b18439050
commit bbd0dc8607
1 changed files with 22 additions and 0 deletions
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22
libs/ui/InputDispatcher.cpp
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@ -37,7 +37,9 @@
// Log debug messages about the app switch latency optimization.
#define DEBUG_APP_SWITCH 0
#include <android/input.h>
#include <cutils/log.h>
#include <ui/Input.h>
#include <ui/InputDispatcher.h>
#include <ui/PowerManager.h>
@ -2092,6 +2094,26 @@ void InputDispatcher::notifyKey(nsecs_t eventTime, int32_t deviceId, int32_t sou
return;
}
/* According to http://source.android.com/porting/keymaps_keyboard_input.html
* Key definitions: Key definitions follow the syntax key SCANCODE KEYCODE [FLAGS...],
* where SCANCODE is a number, KEYCODE is defined in your specific keylayout file
* (android.keylayout.xxx), and potential FLAGS are defined as follows:
* SHIFT: While pressed, the shift key modifier is set
* ALT: While pressed, the alt key modifier is set
* CAPS: While pressed, the caps lock key modifier is set
* Since KeyEvent.java doesn't check if Cap lock is ON and we don't have a
* modifer state for cap lock, we will not support it.
*/
if (policyFlags & POLICY_FLAG_ALT) {
metaState |= AMETA_ALT_ON | AMETA_ALT_LEFT_ON;
}
if (policyFlags & POLICY_FLAG_ALT_GR) {
metaState |= AMETA_ALT_ON | AMETA_ALT_RIGHT_ON;
}
if (policyFlags & POLICY_FLAG_SHIFT) {
metaState |= AMETA_SHIFT_ON | AMETA_SHIFT_LEFT_ON;
}
policyFlags |= POLICY_FLAG_TRUSTED;
mPolicy->interceptKeyBeforeQueueing(eventTime, deviceId, action, /*byref*/ flags,
keyCode, scanCode, /*byref*/ policyFlags);