[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, 87 insertions, 0 deletions

diff --git a/platform/javascript/godot_js.h b/platform/javascript/godot_js.h
new file mode 100644
index 0000000000..23596a0897
--- /dev/null
+++ b/platform/javascript/godot_js.h
@@ -0,0 +1,87 @@
+/*************************************************************************/
+/*  godot_js.h                                                           */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+
+#ifndef GODOT_JS_H
+#define GODOT_JS_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "stddef.h"
+
+// Config
+extern void godot_js_config_locale_get(char *p_ptr, int p_ptr_max);
+extern void godot_js_config_canvas_id_get(char *p_ptr, int p_ptr_max);
+extern int godot_js_config_is_resize_on_start();
+
+// OS
+extern void godot_js_os_finish_async(void (*p_callback)());
+extern void godot_js_os_request_quit_cb(void (*p_callback)());
+extern int godot_js_os_fs_is_persistent();
+extern void godot_js_os_fs_sync(void (*p_callback)());
+extern int godot_js_os_execute(const char *p_json);
+extern void godot_js_os_shell_open(const char *p_uri);
+
+// Display
+extern double godot_js_display_pixel_ratio_get();
+extern void godot_js_display_alert(const char *p_text);
+extern int godot_js_display_touchscreen_is_available();
+extern int godot_js_display_is_swap_ok_cancel();
+
+// Display canvas
+extern void godot_js_display_canvas_focus();
+extern int godot_js_display_canvas_is_focused();
+extern void godot_js_display_canvas_bounding_rect_position_get(int32_t *p_x, int32_t *p_y);
+
+// Display window
+extern void godot_js_display_window_request_fullscreen();
+extern void godot_js_display_window_title_set(const char *p_text);
+extern void godot_js_display_window_icon_set(const uint8_t *p_ptr, int p_len);
+
+// Display clipboard
+extern int godot_js_display_clipboard_set(const char *p_text);
+extern int godot_js_display_clipboard_get(void (*p_callback)(const char *p_text));
+
+// Display cursor
+extern void godot_js_display_cursor_set_shape(const char *p_cursor);
+extern int godot_js_display_cursor_is_hidden();
+extern void godot_js_display_cursor_set_custom_shape(const char *p_shape, const uint8_t *p_ptr, int p_len, int p_hotspot_x, int p_hotspot_y);
+extern void godot_js_display_cursor_set_visible(int p_visible);
+
+// Display listeners
+extern void godot_js_display_notification_cb(void (*p_callback)(int p_notification), int p_enter, int p_exit, int p_in, int p_out);
+extern void godot_js_display_paste_cb(void (*p_callback)(const char *p_text));
+extern void godot_js_display_drop_files_cb(void (*p_callback)(char **p_filev, int p_filec));
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GODOT_JS_H */