Android port: add support for hardware keys

 * Forward Java KeyEvents to C layer and translate them to Rockbox BUTTON_*.
 * Add a basic Android keymap

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27832 a1c6a512-1295-4272-9138-f99709370657

5 files changed, 185 insertions, 30 deletions

diff --git a/firmware/target/hosted/android/app/android_keyevents.h b/firmware/target/hosted/android/app/android_keyevents.h
new file mode 100644
index 0000000000..82c525f396
--- /dev/null
+++ b/firmware/target/hosted/android/app/android_keyevents.h
@@ -0,0 +1,97 @@
+/* Ripped from http://android.git.kernel.org/?p=platform/frameworks/base.git;a=blob_plain;f=core/java/android/view/KeyEvent.java;hb=HEAD */
+#define KEYCODE_UNKNOWN          0
+#define KEYCODE_SOFT_LEFT        1
+#define KEYCODE_SOFT_RIGHT       2
+#define KEYCODE_HOME             3
+#define KEYCODE_BACK             4
+#define KEYCODE_CALL             5
+#define KEYCODE_ENDCALL          6
+#define KEYCODE_0                7
+#define KEYCODE_1                8
+#define KEYCODE_2                9
+#define KEYCODE_3                10
+#define KEYCODE_4                11
+#define KEYCODE_5                12
+#define KEYCODE_6                13
+#define KEYCODE_7                14
+#define KEYCODE_8                15
+#define KEYCODE_9                16
+#define KEYCODE_STAR             17
+#define KEYCODE_POUND            18
+#define KEYCODE_DPAD_UP          19
+#define KEYCODE_DPAD_DOWN        20
+#define KEYCODE_DPAD_LEFT        21
+#define KEYCODE_DPAD_RIGHT       22
+#define KEYCODE_DPAD_CENTER      23
+#define KEYCODE_VOLUME_UP        24
+#define KEYCODE_VOLUME_DOWN      25
+#define KEYCODE_POWER            26
+#define KEYCODE_CAMERA           27
+#define KEYCODE_CLEAR            28
+#define KEYCODE_A                29
+#define KEYCODE_B                30
+#define KEYCODE_C                31
+#define KEYCODE_D                32
+#define KEYCODE_E                33
+#define KEYCODE_F                34
+#define KEYCODE_G                35
+#define KEYCODE_H                36
+#define KEYCODE_I                37
+#define KEYCODE_J                38
+#define KEYCODE_K                39
+#define KEYCODE_L                40
+#define KEYCODE_M                41
+#define KEYCODE_N                42
+#define KEYCODE_O                43
+#define KEYCODE_P                44
+#define KEYCODE_Q                45
+#define KEYCODE_R                46
+#define KEYCODE_S                47
+#define KEYCODE_T                48
+#define KEYCODE_U                49
+#define KEYCODE_V                50
+#define KEYCODE_W                51
+#define KEYCODE_X                52
+#define KEYCODE_Y                53
+#define KEYCODE_Z                54
+#define KEYCODE_COMMA            55
+#define KEYCODE_PERIOD           56
+#define KEYCODE_ALT_LEFT         57
+#define KEYCODE_ALT_RIGHT        58
+#define KEYCODE_SHIFT_LEFT       59
+#define KEYCODE_SHIFT_RIGHT      60
+#define KEYCODE_TAB              61
+#define KEYCODE_SPACE            62
+#define KEYCODE_SYM              63
+#define KEYCODE_EXPLORER         64
+#define KEYCODE_ENVELOPE         65
+#define KEYCODE_ENTER            66
+#define KEYCODE_DEL              67
+#define KEYCODE_GRAVE            68
+#define KEYCODE_MINUS            69
+#define KEYCODE_EQUALS           70
+#define KEYCODE_LEFT_BRACKET     71
+#define KEYCODE_RIGHT_BRACKET    72
+#define KEYCODE_BACKSLASH        73
+#define KEYCODE_SEMICOLON        74
+#define KEYCODE_APOSTROPHE       75
+#define KEYCODE_SLASH            76
+#define KEYCODE_AT               77
+#define KEYCODE_NUM              78
+#define KEYCODE_HEADSETHOOK      79
+#define KEYCODE_FOCUS            80
+#define KEYCODE_PLUS             81
+#define KEYCODE_MENU             82
+#define KEYCODE_NOTIFICATION     83
+#define KEYCODE_SEARCH           84
+#define KEYCODE_MEDIA_PLAY_PAUSE 85
+#define KEYCODE_MEDIA_STOP       86
+#define KEYCODE_MEDIA_NEXT       87
+#define KEYCODE_MEDIA_PREVIOUS   88
+#define KEYCODE_MEDIA_REWIND     89
+#define KEYCODE_MEDIA_FAST_FORWARD  90
+#define KEYCODE_MUTE             91
+#define KEYCODE_PAGE_UP          92
+#define KEYCODE_PAGE_DOWN        93
+#define KEYCODE_PICTSYMBOLS      94
+#define KEYCODE_SWITCH_CHARSET   95
diff --git a/firmware/target/hosted/android/app/android_keyevents.sh b/firmware/target/hosted/android/app/android_keyevents.sh
new file mode 100755
index 0000000000..cd654ad01e
--- /dev/null
+++ b/firmware/target/hosted/android/app/android_keyevents.sh
@@ -0,0 +1,9 @@
+#!/bin/sh
+# Simple script that converts Android's KEYCODE_* ints to preprocessor #defines
+
+URL="http://android.git.kernel.org/?p=platform/frameworks/base.git;a=blob_plain;f=core/java/android/view/KeyEvent.java;hb=HEAD"
+
+echo "Processing $URL..."
+(echo "/* Ripped from $URL */";
+ curl $URL | grep "public static final int KEYCODE" | sed 's/^.*public static final int \(KEYCODE_.*\) *= *\([0-9]*\).*$/#define \1 \2/'
+) > `dirname $0`/android_keyevents.h
diff --git a/firmware/target/hosted/android/app/button-application.c b/firmware/target/hosted/android/app/button-application.c
index a27f769718..47798a6096 100644
--- a/firmware/target/hosted/android/app/button-application.c
+++ b/firmware/target/hosted/android/app/button-application.c
@@ -17,13 +17,31 @@
  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  * KIND, either express or implied.
  *
- ***************************************************9*************************/
+ *****************************************************************************/
 
 
 #include "button.h"
+#include "android_keyevents.h"
 
 int key_to_button(int keyboard_key)
 {
-    (void)keyboard_key;
-    return BUTTON_NONE;
+    switch (keyboard_key)
+    {
+        default:
+            return BUTTON_NONE;
+        case KEYCODE_BACK:
+            return BUTTON_BACK;
+        case KEYCODE_DPAD_UP:
+            return BUTTON_DPAD_UP;
+        case KEYCODE_DPAD_DOWN:
+            return BUTTON_DPAD_DOWN;
+        case KEYCODE_DPAD_LEFT:
+            return BUTTON_DPAD_LEFT;
+        case KEYCODE_DPAD_RIGHT:
+            return BUTTON_DPAD_RIGHT;
+        case KEYCODE_DPAD_CENTER:
+            return BUTTON_DPAD_CENTER;
+        case KEYCODE_MENU:
+            return BUTTON_MENU;
+    }
 }
diff --git a/firmware/target/hosted/android/app/button-target.h b/firmware/target/hosted/android/app/button-target.h
index 329ed651af..6c7bd271e9 100644
--- a/firmware/target/hosted/android/app/button-target.h
+++ b/firmware/target/hosted/android/app/button-target.h
@@ -30,35 +30,32 @@ void button_init_device(void);
 int button_read_device(int *data);
 
 /* Main unit's buttons */
-#define BUTTON_POWER      0x00000001
-#define BUTTON_PLUS       0x00000002
-#define BUTTON_MINUS      0x00000004
-#define BUTTON_MENU       0x00000008
+#define BUTTON_MENU        0x00000001
+#define BUTTON_BACK        0x00000002
+#define BUTTON_DPAD_LEFT   0x00000004
+#define BUTTON_DPAD_RIGHT  0x00000008
+#define BUTTON_DPAD_UP     0x00000010
+#define BUTTON_DPAD_DOWN   0x00000020
+#define BUTTON_DPAD_CENTER 0x00000040
 
 /* Compatibility hacks for flipping. Needs a somewhat better fix. */
-#define BUTTON_LEFT  BUTTON_MIDLEFT
-#define BUTTON_RIGHT BUTTON_MIDRIGHT
-#define BUTTON_UP    BUTTON_TOPMIDDLE
-#define BUTTON_DOWN  BUTTON_BOTTOMMIDDLE
+#define BUTTON_LEFT  BUTTON_DPAD_LEFT
+#define BUTTON_RIGHT BUTTON_DPAD_RIGHT
+#define BUTTON_UP    BUTTON_DPAD_UP
+#define BUTTON_DOWN  BUTTON_DPAD_DOWN
 
 /* Touch Screen Area Buttons */
-#define BUTTON_TOPLEFT      0x00000010
-#define BUTTON_TOPMIDDLE    0x00000020
-#define BUTTON_TOPRIGHT     0x00000040
-#define BUTTON_MIDLEFT      0x00000080
-#define BUTTON_CENTER       0x00000100
-#define BUTTON_MIDRIGHT     0x00000200
-#define BUTTON_BOTTOMLEFT   0x00000400
-#define BUTTON_BOTTOMMIDDLE 0x00000800
-#define BUTTON_BOTTOMRIGHT  0x00001000
-
-#define BUTTON_MAIN 0x1FFF
+#define BUTTON_TOPLEFT      0x00001000
+#define BUTTON_TOPMIDDLE    0x00002000
+#define BUTTON_TOPRIGHT     0x00004000
+#define BUTTON_MIDLEFT      0x00008000
+#define BUTTON_CENTER       0x00010000
+#define BUTTON_MIDRIGHT     0x00020000
+#define BUTTON_BOTTOMLEFT   0x00040000
+#define BUTTON_BOTTOMMIDDLE 0x00080000
+#define BUTTON_BOTTOMRIGHT  0x00100000
 
 /* No remote */
 #define BUTTON_REMOTE 0
-
-/* Software power-off */
-#define POWEROFF_BUTTON BUTTON_POWER
-#define POWEROFF_COUNT 10
                 
 #endif /* _BUTTON_TARGET_H_ */
diff --git a/firmware/target/hosted/android/button-android.c b/firmware/target/hosted/android/button-android.c
index 1172880908..50e347e714 100644
--- a/firmware/target/hosted/android/button-android.c
+++ b/firmware/target/hosted/android/button-android.c
@@ -22,12 +22,15 @@
 
 #include <jni.h>
 #include <stdbool.h>
+#include "button.h"
+#include "buttonmap.h"
 #include "config.h"
 #include "kernel.h"
 #include "system.h"
 #include "touchscreen.h"
 
 static int last_y, last_x;
+static int last_btns;
 
 static enum {
     STATE_UNKNOWN,
@@ -35,7 +38,6 @@ static enum {
     STATE_DOWN,
 } last_state = STATE_UNKNOWN;
 
-
 /*
  * this writes in an interrupt-like fashion the last pixel coordinates
  * that the user pressed on the screen */
@@ -64,13 +66,45 @@ Java_org_rockbox_RockboxFramebuffer_touchHandler(JNIEnv*env, jobject this,
         last_state = STATE_UP;
 }
 
+/*
+ * this writes in an interrupt-like fashion the button events that the user
+ * generated by pressing/releasing them to a variable */
+JNIEXPORT bool JNICALL
+Java_org_rockbox_RockboxFramebuffer_buttonHandler(JNIEnv*env, jobject this,
+                                                  int keycode, bool state)
+{
+    (void)env;
+    (void)this;
+
+    int button = key_to_button(keycode);
+
+    if (button == BUTTON_NONE)
+        return false;
+
+    if (state)
+        last_btns |= button;
+    else
+        last_btns &= ~button;
+
+    return true;
+}
+
 void button_init_device(void)
 {
 }
 
 int button_read_device(int *data)
 {
-    /* get grid button/coordinates based on the current touchscreen mode */
-    int btn = touchscreen_to_pixels(last_x, last_y, data);
-    return (last_state == STATE_DOWN ? btn : 0);
+    int btn = last_btns;
+    /* Get grid button/coordinates based on the current touchscreen mode
+     *
+     * Caveat: the caller seemingly depends on *data always being filled with
+     *         the last known touchscreen position, so always call
+     *         touchscreen_to_pixels() */
+    int touch = touchscreen_to_pixels(last_x, last_y, data);
+
+    if (last_state == STATE_DOWN)
+        btn |= touch;
+
+    return btn;
 }