Added the ability to query the safe area (#404)

recipes/ios/src/ios.pyx

@@ -11,12 +11,18 @@ from os.path import basename
 
 cdef extern from "ios_wrapper.h":
     ctypedef void (*ios_send_email_cb)(char *, void *)
+    ctypedef struct padding:
+        float top
+        float bottom
+        float right
+        float left
     int ios_send_email(char *subject, char *text, char *mimetype, char
             *filename, char *filename_alias, ios_send_email_cb cb, void *userdata)
     void ios_open_url(char *url)
     void load_url_webview(char *url, int width, int height)
     float ios_uiscreen_get_scale()
     int ios_uiscreen_get_dpi()
+    padding ios_get_safe_area()
 
 cdef void _send_email_done(char *status, void *data):
     cdef object callback = <object>data
@@ -206,6 +212,10 @@ def get_dpi():
     '''
     return ios_uiscreen_get_dpi()
 
+def get_safe_area():
+    '''Return the safe area bounds
+    '''
+    return ios_get_safe_area()
 
 from pyobjus import autoclass, selector, protocol
 from pyobjus.protocols import protocols

recipes/ios/src/ios_mail.m

@@ -127,3 +127,20 @@ int ios_uiscreen_get_dpi() {
 	}
 	return dpi;
 }
+
+padding ios_get_safe_area() {
+	padding safearea;
+	if (@available(iOS 11.0, *)){
+		UIWindow *window = UIApplication.sharedApplication.windows[0];
+		safearea.top = window.safeAreaInsets.top;
+		safearea.bottom = window.safeAreaInsets.bottom;
+		safearea.left = window.safeAreaInsets.left;
+		safearea.right = window.safeAreaInsets.right;
+	} else {
+		safearea.top = 0;
+		safearea.bottom = 0;
+		safearea.left = 0;
+		safearea.right = 0;
+	}
+	return safearea;
+}

recipes/ios/src/ios_wrapper.h

@@ -1,8 +1,16 @@
 #ifndef __IOS_WRAPPER
 #define __IOS_WRAPPER
 
+typedef struct {
+	float top;
+	float bottom;
+	float right;
+	float left;
+} padding;
+
 float ios_uiscreen_get_scale(void);
 int ios_uiscreen_get_dpi(void);
+padding ios_get_safe_area(void);
 void ios_open_url(char *url);
 void load_url_webview(char *url, int width, int height);