[HTML5] Port JavaScript inline code to libraries.

The API is implemented in javascript, and generates C functions that can
be called from godot.
This allows much cleaner code replacing all `EM_ASM` calls in our C++
code with plain C function calls.
This also gets rid of few hacks and comes with few optimizations (e.g.
custom cursor shapes should be much faster now).

1 files changed, 6 insertions, 19 deletions

diff --git a/platform/javascript/api/javascript_tools_editor_plugin.cpp b/platform/javascript/api/javascript_tools_editor_plugin.cpp
index d44e8139a1..8d781703ed 100644
--- a/platform/javascript/api/javascript_tools_editor_plugin.cpp
+++ b/platform/javascript/api/javascript_tools_editor_plugin.cpp
@@ -39,6 +39,11 @@
 
 #include <emscripten/emscripten.h>
 
+// JavaScript functions defined in library_godot_editor_tools.js
+extern "C" {
+extern void godot_js_editor_download_file(const char *p_path, const char *p_name, const char *p_mime);
+}
+
 static void _javascript_editor_init_callback() {
 	EditorNode::get_singleton()->add_editor_plugin(memnew(JavaScriptToolsEditorPlugin(EditorNode::get_singleton())));
 }
@@ -65,25 +70,7 @@ void JavaScriptToolsEditorPlugin::_download_zip(Variant p_v) {
 	String base_path = resource_path.substr(0, resource_path.rfind("/")) + "/";
 	_zip_recursive(resource_path, base_path, zip);
 	zipClose(zip, NULL);
-	EM_ASM({
-		const path = "/tmp/project.zip";
-		const size = FS.stat(path)["size"];
-		const buf = new Uint8Array(size);
-		const fd = FS.open(path, "r");
-		FS.read(fd, buf, 0, size);
-		FS.close(fd);
-		FS.unlink(path);
-		const blob = new Blob([buf], { type: "application/zip" });
-		const url = window.URL.createObjectURL(blob);
-		const a = document.createElement("a");
-		a.href = url;
-		a.download = "project.zip";
-		a.style.display = "none";
-		document.body.appendChild(a);
-		a.click();
-		a.remove();
-		window.URL.revokeObjectURL(url);
-	});
+	godot_js_editor_download_file("/tmp/project.zip", "project.zip", "application/zip");
 }
 
 void JavaScriptToolsEditorPlugin::_bind_methods() {