add js save dialog

src/app.h

@@ -167,7 +167,7 @@ public:
     bool clipboard_set_text(const std::string& s);
     void pick_image(std::function<void(std::string path)> callback);
     void pick_file(std::vector<std::string> types, std::function<void(std::string path)> callback);
-#if __IOS__
+#if __IOS__ || __WEB__
     void pick_file_save(const std::string& type, std::function<void(std::string path)> writer,
         std::function<void(bool saved)> callback);
 #else

src/app_dialogs.cpp

@@ -8,11 +8,15 @@
 #include "node_about.h"
 #include "node_changelog.h"
 #include "node_usermanual.h"
+#include "node_dialog_export_ppbr.h"
 
 #ifdef __QUEST__
 #include "oculus_vr.h"
+#elif __WEB__
+void webgl_pick_file(std::function<void(std::string)> callback);
+void webgl_pick_file_save(const std::string& path, 
+    const std::string& name, std::function<void(bool)> callback);
 #endif
-#include "node_dialog_export_ppbr.h"
 
 std::shared_ptr<NodeProgressBar> App::show_progress(const std::string& title, int total /*= 0*/)
 {
@@ -435,7 +439,8 @@ void App::dialog_export(std::string ext)
     {
         // TODO: use picker
         auto path = work_path + "/" + doc_name + ext;
-        canvas->m_canvas->export_equirectangular(path, [this, path]{
+        auto name = doc_name + ext;
+        canvas->m_canvas->export_equirectangular(path, [this, path, name]{
 #if defined(__IOS__)
             message_box("Export Equirectangular", "Image exported to Photos");
 #elif defined(__OSX__)
@@ -444,6 +449,10 @@ void App::dialog_export(std::string ext)
             message_box("Export Equirectangular", "Image exported to " + work_path);
 #elif defined(__QUEST__)
             //auto result = ovr_Media_ShareToFacebook("Sharing from PanoPainter on Oculus Quest", path.c_str(), ovrMediaContentType_Photo);
+#elif __WEB__
+            ui_task([=]{
+                webgl_pick_file_save(path, name, [](bool success){ });
+            });
 #endif
         });
     }
@@ -609,7 +618,7 @@ void App::dialog_ppbr_export()
         info.dest_path = dialog->m_dest_path;
         if (dialog->export_check)
             info.export_data = dialog->export_check->checked;
-#if __IOS__
+#if __IOS__ || __WEB__
         App::I->pick_file_save("ppbr",
             [this, dialog, info] (std::string path) {
                 presets->export_ppbr(path, info);

src/app_events.cpp

@@ -19,6 +19,8 @@ std::string win32_clipboard_get_text();
 #include <tinyfiledialogs.h>
 #elif __WEB__
 void webgl_pick_file(std::function<void(std::string)> callback);
+void webgl_pick_file_save(const std::string& path, 
+    const std::string& name, std::function<void(bool)> callback);
 #endif
 
 
@@ -235,8 +237,18 @@ void App::pick_file_save(const std::string& type, std::function<void(std::string
         mb->destroy();
     };
 }
+#elif __WEB__
+void App::pick_file_save(const std::string& type, std::function<void(std::string)> writer,
+    std::function<void(bool saved)> callback)
+{
+    redraw = true;
+    auto path = data_path + "/file-save." + type;
+    LOG("App::pick_file_save %s", path.c_str());
+    writer(path);
+    webgl_pick_file_save(path, "file." + type, callback);
+}
 #else
-void App::pick_file_save(std::vector<std::string> types, std::function<void (std::string)> callback)
+void App::pick_file_save(std::vector<std::string> types, std::function<void(std::string)> callback)
 {
     redraw = true;
 #if __OSX__