IME events are now dispatched to native applications.

And also:

- APIs to show and hide the IME, and control its interaction with the app.
- APIs to tell the app when its window resizes and needs to be redrawn.
- API to tell the app the content rectangle of its window (to layout
  around the IME or status bar).

There is still a problem with IME interaction -- we need a way for the
app to deliver events to the IME before it handles them, so that for
example the back key will close the IME instead of finishing the app.

Change-Id: I37b75fc2ec533750ef36ca3aedd2f0cc0b5813cd

2 files changed, 74 insertions, 0 deletions

diff --git a/native/include/android/native_activity.h b/native/include/android/native_activity.h
index d0ff052..ea6f05f 100644
--- a/native/include/android/native_activity.h
+++ b/native/include/android/native_activity.h
@@ -147,6 +147,21 @@ typedef struct ANativeActivityCallbacks {
     void (*onNativeWindowCreated)(ANativeActivity* activity, ANativeWindow* window);
 
     /**
+     * The drawing window for this native activity has been resized.  You should
+     * retrieve the new size from the window and ensure that your rendering in
+     * it now matches.
+     */
+    void (*onNativeWindowResized)(ANativeActivity* activity, ANativeWindow* window);
+
+    /**
+     * The drawing window for this native activity needs to be redrawn.  To avoid
+     * transient artifacts during screen changes (such resizing after rotation),
+     * applications should not return from this function until they have finished
+     * drawing their window in its current state.
+     */
+    void (*onNativeWindowRedrawNeeded)(ANativeActivity* activity, ANativeWindow* window);
+
+    /**
      * The drawing window for this native activity is going to be destroyed.
      * You MUST ensure that you do not touch the window object after returning
      * from this function: in the common case of drawing to the window from
@@ -170,6 +185,11 @@ typedef struct ANativeActivityCallbacks {
     void (*onInputQueueDestroyed)(ANativeActivity* activity, AInputQueue* queue);
 
     /**
+     * The rectangle in the window in which content should be placed has changed.
+     */
+    void (*onContentRectChanged)(ANativeActivity* activity, const ARect* rect);
+
+    /**
      * The system is running low on memory.  Use this callback to release
      * resources you do not need, to help the system avoid killing more
      * important processes.
@@ -197,6 +217,28 @@ void ANativeActivity_setWindowFormat(ANativeActivity* activity, int32_t format);
 void ANativeActivity_setWindowFlags(ANativeActivity* activity,
         uint32_t addFlags, uint32_t removeFlags);
 
+/**
+ * Flags for ANativeActivity_showSoftInput; see the Java InputMethodManager
+ * API for documentation.
+ */
+enum {
+    ANATIVEACTIVITY_SHOW_SOFT_INPUT_IMPLICIT = 0x0001,
+    ANATIVEACTIVITY_SHOW_SOFT_INPUT_FORCED = 0x0002,
+};
+
+void ANativeActivity_showSoftInput(ANativeActivity* activity, uint32_t flags);
+
+/**
+ * Flags for ANativeActivity_hideSoftInput; see the Java InputMethodManager
+ * API for documentation.
+ */
+enum {
+    ANATIVEACTIVITY_HIDE_SOFT_INPUT_IMPLICIT_ONLY = 0x0001,
+    ANATIVEACTIVITY_HIDE_SOFT_INPUT_NOT_ALWAYS = 0x0002,
+};
+
+void ANativeActivity_hideSoftInput(ANativeActivity* activity, uint32_t flags);
+
 #ifdef __cplusplus
 };
 #endif
diff --git a/native/include/android_glue/threaded_app.h b/native/include/android_glue/threaded_app.h
index adfdbea..2b58e9c 100644
--- a/native/include/android_glue/threaded_app.h
+++ b/native/include/android_glue/threaded_app.h
@@ -48,6 +48,10 @@ struct android_app {
     // When non-NULL, this is the window surface that the app can draw in.
     ANativeWindow* window;
 
+    // Current content rectangle of the window; this is the area where the
+    // window's content should be placed to be seen by the user.
+    ARect contentRect;
+
     // Current state of the app's activity.  May be either APP_CMD_START,
     // APP_CMD_RESUME, APP_CMD_PAUSE, or APP_CMD_STOP; see below.
     int activityState;
@@ -69,8 +73,10 @@ struct android_app {
 
     int running;
     int destroyed;
+    int redrawNeeded;
     AInputQueue* pendingInputQueue;
     ANativeWindow* pendingWindow;
+    ARect pendingContentRect;
 };
 
 enum {
@@ -105,6 +111,26 @@ enum {
     APP_CMD_WINDOW_CHANGED,
 
     /**
+     * Command from main thread: the current ANativeWindow has been resized.
+     * Please redraw with its new size.
+     */
+    APP_CMD_WINDOW_RESIZED,
+
+    /**
+     * Command from main thread: the system needs that the current ANativeWindow
+     * be redrawn.  You should redraw the window before handing this to
+     * android_app_exec_cmd() in order to avoid transient drawing glitches.
+     */
+    APP_CMD_WINDOW_REDRAW_NEEDED,
+
+    /**
+     * Command from main thread: the content area of the window has changed,
+     * such as from the soft input window being shown or hidden.  You can
+     * find the new content rect in android_app::contentRect.
+     */
+    APP_CMD_CONTENT_RECT_CHANGED,
+
+    /**
      * Command from main thread: the app's activity window has gained
      * input focus.
      */
@@ -117,6 +143,12 @@ enum {
     APP_CMD_LOST_FOCUS,
 
     /**
+     * Command from main thread: the system is running low on memory.
+     * Try to reduce your memory use.
+     */
+    APP_CMD_LOW_MEMORY,
+
+    /**
      * Command from main thread: the app's activity has been started.
      */
     APP_CMD_START,