upstream beta_99 (ce0b6380)

web/platform/WebFiles.cpp

@@ -0,0 +1,62 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Files between the UI and the visitor (see WebFiles.h).
+#include "WebFiles.h"
+#include <Arduino.h>
+#include <string>
+#include <vector>
+#include "wada_host.h"
+#if defined(__EMSCRIPTEN__)
+#include <emscripten.h>
+#endif
+
+namespace {
+std::string s_picked;   // the SPIFFS path of a file the visitor chose (UI thread only)
+}
+
+#if defined(__EMSCRIPTEN__)
+EM_JS(void, wada_js_download, (const uint8_t* p, int n, const char* name), {
+  if (Module["wadaDownload"]) Module["wadaDownload"](HEAPU8.slice(p, p + n), UTF8ToString(name));
+});
+EM_JS(void, wada_js_pick, (const char* accept), {
+  if (Module["wadaPickFile"]) Module["wadaPickFile"](UTF8ToString(accept));
+});
+extern "C" EMSCRIPTEN_KEEPALIVE void wadaWebFilePicked(const char* spiffs_path) {
+  if (spiffs_path && spiffs_path[0] == '/') s_picked = spiffs_path;
+}
+#endif
+
+void boardHandOffFile(fs::FS& fs, const char* path, const char* download_name) {
+  File f = fs.open(path, "r");
+  if (!f) return;
+  std::vector<uint8_t> buf(f.size());
+  const size_t n = buf.empty() ? 0 : f.read(buf.data(), buf.size());
+  f.close();
+#if defined(__EMSCRIPTEN__)
+  wada_js_download(buf.data(), (int)n, download_name);
+#else
+  const std::string dir = wadaHostDataDir() + "/downloads";
+  wadaHostMkdirs(dir);
+  const std::string out = dir + "/" + download_name;
+  if (FILE* o = fopen(out.c_str(), "wb")) {
+    fwrite(buf.data(), 1, n, o);
+    fclose(o);
+    Serial.printf("[web] download: %s\n", out.c_str());
+  }
+#endif
+}
+
+void boardPickFile(const char* accept) {
+#if defined(__EMSCRIPTEN__)
+  wada_js_pick(accept ? accept : "");
+#else
+  (void)accept;
+  Serial.println("[web] no file picker in the native build: put the file in the data dir's spiffs/");
+#endif
+}
+
+bool boardTakePickedFile(char* path, size_t cap) {
+  if (s_picked.empty() || !path || cap == 0) return false;
+  snprintf(path, cap, "%s", s_picked.c_str());
+  s_picked.clear();
+  return true;
+}