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

1 files changed, 38 insertions, 4 deletions

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;
 }