Enable file selector on emscripten.

1 files changed, 40 insertions, 4 deletions

diff --git a/server/TracyFileselector.cpp b/server/TracyFileselector.cpp
index cc89a8e1..96086390 100644
--- a/server/TracyFileselector.cpp
+++ b/server/TracyFileselector.cpp
@@ -1,7 +1,11 @@
 #include "TracyFileselector.hpp"
 
 #ifndef TRACY_NO_FILESELECTOR
-#  include "../nfd/nfd.h"
+#  ifdef __EMSCRIPTEN__
+#    include <emscripten.h>
+#  else
+#    include "../nfd/nfd.h"
+#  endif
 #endif
 
 namespace tracy::Fileselector
@@ -9,21 +13,52 @@ namespace tracy::Fileselector
 
 void Init()
 {
-#ifndef TRACY_NO_FILESELECTOR
+#if !defined TRACY_NO_FILESELECTOR && !defined __EMSCRIPTEN__
     NFD_Init();
 #endif
 }
 
 void Shutdown()
 {
-#ifndef TRACY_NO_FILESELECTOR
+#if !defined TRACY_NO_FILESELECTOR && !defined __EMSCRIPTEN__
     NFD_Quit();
 #endif
 }
 
+#ifdef __EMSCRIPTEN__
+static std::function<void(const char*)> s_openFileCallback;
+
+extern "C" int nativeOpenFile()
+{
+    s_openFileCallback( "upload.tracy" );
+    return 0;
+}
+#endif
+
 void OpenFile( const char* ext, const char* desc, std::function<void(const char*)> callback )
 {
 #ifndef TRACY_NO_FILESELECTOR
+#  ifdef __EMSCRIPTEN__
+    s_openFileCallback = callback;
+    EM_ASM( {
+        var input = document.createElement( 'input' );
+        input.type = 'file';
+        input.accept = UTF8ToString( $0 );
+        input.onchange = (e) => {
+            var file = e.target.files[0];
+            var reader = new FileReader();
+            reader.readAsArrayBuffer( file );
+            reader.onload = () => {
+                var buf = reader.result;
+                var view = new Uint8Array( buf );
+                FS.createDataFile( '/', 'upload.tracy', view, true, true );
+                Module.ccall( 'nativeOpenFile', 'number', [], [] );
+                FS.unlink( '/upload.tracy' );
+            };
+        };
+        input.click();
+    }, ext );
+#  else
     nfdu8filteritem_t filter = { desc, ext };
     nfdu8char_t* fn;
     if( NFD_OpenDialogU8( &fn, &filter, 1, nullptr ) == NFD_OKAY )
@@ -31,12 +66,13 @@ void OpenFile( const char* ext, const char* desc, std::function<void(const char*
         callback( (const char*)fn );
         NFD_FreePathU8( fn );
     }
+#  endif
 #endif
 }
 
 void SaveFile( const char* ext, const char* desc, std::function<void(const char*)> callback )
 {
-#ifndef TRACY_NO_FILESELECTOR
+#if !defined TRACY_NO_FILESELECTOR && !defined __EMSCRIPTEN__
     nfdu8filteritem_t filter = { desc, ext };
     nfdu8char_t* fn;
     if( NFD_SaveDialogU8( &fn, &filter, 1, nullptr, nullptr ) == NFD_OKAY )