modify

add wm proxy
add read/write json file
add getRunnables to ApplicationGuide.md

Change-Id: I65e9e6620ecb207c999e590410782590edd7005d

4 files changed, 106 insertions, 4 deletions

diff --git a/src/hs-helper.cpp b/src/hs-helper.cpp
index 50a3ae1..159668e 100644
--- a/src/hs-helper.cpp
+++ b/src/hs-helper.cpp
@@ -17,6 +17,7 @@
 #include <string.h>
 #include <cstdarg>
 #include "hs-helper.h"
+#include <unistd.h>
 
 
 const char* evlist[] = {
@@ -272,3 +273,51 @@ std::string get_application_id(const afb_req_t request)
 
     return appid;
 }
+
+/**
+ * read json file
+ *
+ * #### Parameters
+ * - file : file name
+ * - obj : json_object
+ *
+ * #### Return
+ * 0 : read success
+ * 1 : read fail
+ *
+ */
+int readJsonFile(const char* file, struct json_object **obj)
+{
+    *obj = nullptr;
+    int ret = -1;
+    FILE *fp = fopen(file, "rb");
+    if(fp == nullptr) {
+        AFB_ERROR("open %s failed", file);
+        return ret;
+    }
+
+    const int buf_size = 128;
+    char buf[buf_size];
+    struct json_tokener *tokener = json_tokener_new();
+    enum json_tokener_error json_error;
+    while(1) {
+        size_t len = fread(buf, sizeof(char), buf_size, fp);
+        *obj = json_tokener_parse_ex(tokener, buf, len);
+        if(nullptr != *obj) {
+            AFB_NOTICE("read %s success", file);
+            ret = 0;
+            break;
+        }
+
+        json_error = json_tokener_get_error(tokener);
+        if ((json_tokener_continue != json_error) || (buf_size > len)) {
+            AFB_ERROR("parse %s error", file);
+            *obj = nullptr;
+            break;
+        }
+	}
+
+	fclose(fp);
+	json_tokener_free(tokener);
+	return ret;
+}
diff --git a/src/hs-helper.h b/src/hs-helper.h
index f57799d..55f9386 100644
--- a/src/hs-helper.h
+++ b/src/hs-helper.h
@@ -17,7 +17,7 @@
 #ifndef HOMESCREEN_HELPER_H
 #define HOMESCREEN_HELPER_H
 #define AFB_BINDING_VERSION 3
-#include <afb/afb-binding.h>
+#include <afb/afb-binding>
 #include <json-c/json.h>
 #include <string>
 
@@ -53,6 +53,8 @@ void hs_add_object_to_json_object_str(struct json_object* j_obj, int count, ...)
 void hs_add_object_to_json_object_func(struct json_object* j_obj, const char* verb_name, int count, ...);
 int hs_search_event_name_index(const char* value);
 std::string get_application_id(const afb_req_t request);
+int readJsonFile(const char* file, struct json_object **obj);
+int writeJsonFile(const char* file,  struct json_object *obj);
 
 typedef int (*event_hook_func)(afb_api_t api, const char *event, struct json_object *object);
 void setEventHook(const char *event, const event_hook_func f);
diff --git a/src/hs-proxy.cpp b/src/hs-proxy.cpp
index f0ee5f0..967c1b1 100644
--- a/src/hs-proxy.cpp
+++ b/src/hs-proxy.cpp
@@ -16,8 +16,9 @@
 
 #include "hs-proxy.h"
 
-const char _afm_main[] = "afm-main";
-
+static const char _afm_main[] = "afm-main";
+static const char _windowmanager[] = "windowmanager";
+static const char _event[] = "event";
 
 /**
  * the callback function
@@ -80,6 +81,8 @@ static int api_call_sync(afb_api_t api, const char *service, const char *verb, s
     return ret;
 }
 
+/* -------------------------------------HS_AfmMainProxy------------------------------------------ */
+
 /**
  * get runnables application list
  *
@@ -131,4 +134,24 @@ void HS_AfmMainProxy::start(afb_req_t request, const std::string &id)
 {
     struct json_object *args = json_object_new_string(id.c_str());
     api_call(request->api, _afm_main, __FUNCTION__, args);
-}
\ No newline at end of file
+}
+
+/* -------------------------------------HS_WmProxy------------------------------------------ */
+
+/**
+ * subscribe windowmanager event
+ *
+ * #### Parameters
+ *  - api : the api serving the request
+ *  - event : windowmanager event
+ *
+ * #### Return
+ *  None
+ *
+ */
+void HS_WmProxy::subscribe(afb_api_t api, EventType event)
+{
+    struct json_object* push_obj = json_object_new_object();
+    json_object_object_add(push_obj, _event, json_object_new_int(event));
+    api_call(api, _windowmanager, "wm_subscribe", push_obj);
+}
diff --git a/src/hs-proxy.h b/src/hs-proxy.h
index 8741e49..b6283d6 100644
--- a/src/hs-proxy.h
+++ b/src/hs-proxy.h
@@ -31,4 +31,32 @@ struct HS_AfmMainProxy {
     void start(afb_req_t request, const std::string &id);
 };
 
+class HS_WmProxy {
+public:
+    HS_WmProxy() = default;
+    ~HS_WmProxy() = default;
+
+    enum EventType
+    {
+        Event_Val_Min = 0,
+
+        Event_Active = Event_Val_Min,
+        Event_Inactive,
+
+        Event_Visible,
+        Event_Invisible,
+
+        Event_SyncDraw,
+        Event_FlushDraw,
+
+        Event_ScreenUpdated,
+
+        Event_Error,
+
+        Event_Val_Max = Event_Error,
+    };
+
+    // asynchronous call, reply in callback function
+    void subscribe(afb_api_t api, EventType event);
+};
 #endif // HOMESCREEN_PROXY_H
\ No newline at end of file