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Commit bbd0dc86 authored by Johan Redestig's avatar Johan Redestig
Browse files

Implement support for ALT and SHIFT modifiers 

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
parent 5b184390

libs/ui/InputDispatcher.cpp

+22 −0
Original line number Diff line number Diff line
@@ -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);