associate abr files to panopainter on iOS and fix import menu

src/app.cpp

@@ -31,33 +31,45 @@ void App::create()
 
 void App::open_document(std::string path)
 {
-    auto start = path.rfind('/') + 1;
-    doc_name = path.substr(start, path.length() - start - strlen(".ppi"));
-    doc_dir = path.substr(0, start - 1);
-    doc_path = path;
-    canvas->reset_camera();
-    layers->clear();
-    canvas->m_canvas->project_open(path, [this](bool success){
-        // on complete
-        if (success)
-        {
-            async_start();
-            title_update();
-            for (auto& i : canvas->m_canvas->m_order)
+    std::regex r(R"((.*)[\\/]([^\\/]+)\.(\w+)$)");
+    std::smatch m;
+    if (!std::regex_search(path, m, r))
+        return;
+    std::string ext = m[3].str();
+
+    if (str_iequals(m[3].str(), "abr"))
+    {
+        std::thread(&NodePanelStroke::import_abr, stroke, path).detach();
+    }
+    else
+    {
+        doc_name = m[2].str();
+        doc_dir = m[1].str();
+        doc_path = path;
+        canvas->reset_camera();
+        layers->clear();
+        canvas->m_canvas->project_open(path, [this](bool success){
+            // on complete
+            if (success)
             {
-                auto l = layers->add_layer(canvas->m_canvas->m_layers[i]->m_name.c_str());
-                l->m_visibility->set_value(canvas->m_canvas->m_layers[i]->m_visible);
+                async_start();
+                title_update();
+                for (auto& i : canvas->m_canvas->m_order)
+                {
+                    auto l = layers->add_layer(canvas->m_canvas->m_layers[i]->m_name.c_str());
+                    l->m_visibility->set_value(canvas->m_canvas->m_layers[i]->m_visible);
+                }
+                async_end();
             }
-            async_end();
-        }
-        else
-        {
-            message_box("Open Document Error",
-                "There was an error opening the document.\n"
-                "It may be inaccessible or corrupted.");
-        }
-    });
-    ActionManager::clear();
+            else
+            {
+                message_box("Open Document Error",
+                    "There was an error opening the document.\n"
+                    "It may be inaccessible or corrupted.");
+            }
+        });
+        ActionManager::clear();
+    }
 }
 
 bool App::request_close()

src/app_events.cpp

@@ -86,7 +86,8 @@ void App::pick_file(std::vector<std::string> types, std::function<void (std::str
     redraw = true;
 #ifdef __IOS__
     // not implemented on ios
-    //[ios_view pick_photo:callback];
+    // fallback to pick_image
+    [ios_view pick_photo:callback];
 #elif __OSX__
     dispatch_async(dispatch_get_main_queue(), ^{
         //NSArray* fileTypes = [NSArray arrayWithObjects:@"ppi", @"PPI", nil];