96 lines
3.9 KiB
C++
96 lines
3.9 KiB
C++
#pragma once
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#include <string>
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#include <emscripten.h>
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#define _EM_JS_INLINE(ret, c_name, js_name, params, code) \
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extern "C" { \
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ret c_name params EM_IMPORT(js_name); \
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EMSCRIPTEN_KEEPALIVE \
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__attribute__((section("em_js"), aligned(1))) inline char __em_js__##js_name[] = \
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#params "<::>" code; \
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}
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#define EM_JS_INLINE(ret, name, params, ...) _EM_JS_INLINE(ret, name, name, params, #__VA_ARGS__)
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namespace emscripten_browser_clipboard {
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/////////////////////////////////// Interface //////////////////////////////////
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using paste_handler = void(*)(std::string&&, void*);
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using copy_handler = char const*(*)(void*);
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inline void paste(paste_handler callback, void *callback_data = nullptr);
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inline void copy(copy_handler callback, void *callback_data = nullptr);
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inline void copy(std::string const &content);
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///////////////////////////////// Implementation ///////////////////////////////
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namespace detail {
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EM_JS_INLINE(void, paste_js, (paste_handler callback, void *callback_data), {
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/// Register the given callback to handle paste events. Callback data pointer is passed through to the callback.
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/// Paste handler callback signature is:
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/// void my_handler(std::string const &paste_data, void *callback_data = nullptr);
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document.addEventListener('paste', (event) => {
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Module["ccall"]('emscripten_browser_clipboard_detail_paste_return', 'number', ['string', 'number', 'number'], [event.clipboardData.getData('text/plain;charset=UTF-8'), callback, callback_data]);
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});
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});
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EM_JS_INLINE(void, copy_js, (copy_handler callback, void *callback_data), {
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/// Register the given callback to handle copy events. Callback data pointer is passed through to the callback.
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/// Copy handler callback signature is:
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/// char const *my_handler(void *callback_data = nullptr);
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document.addEventListener('copy', (event) => {
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const content_ptr = Module["ccall"]('emscripten_browser_clipboard_detail_copy_return', 'number', ['number', 'number'], [callback, callback_data]);
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event.clipboardData.setData(mimeType, UTF8ToString(content_ptr));
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event.preventDefault();
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});
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});
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EM_JS_INLINE(void, copy_async_js, (char const *content_ptr), {
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/// Attempt to copy the provided text asynchronously
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navigator.clipboard.writeText(UTF8ToString(content_ptr));
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});
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} // namespace detail
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inline void paste(paste_handler callback, void *callback_data) {
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/// C++ wrapper for javascript paste call
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detail::paste_js(callback, callback_data);
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}
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inline void copy(copy_handler callback, void *callback_data) {
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/// C++ wrapper for javascript copy call
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detail::copy_js(callback, callback_data);
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}
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inline void copy(std::string const &content) {
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/// C++ wrapper for javascript copy call
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detail::copy_async_js(content.c_str());
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}
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namespace detail {
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extern "C" {
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EMSCRIPTEN_KEEPALIVE inline int emscripten_browser_clipboard_detail_paste_return(char const *paste_data, paste_handler callback, void *callback_data);
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EMSCRIPTEN_KEEPALIVE inline int emscripten_browser_clipboard_detail_paste_return(char const *paste_data, paste_handler callback, void *callback_data) {
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/// Call paste callback - this function is called from javascript when the paste event occurs
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callback(paste_data, callback_data);
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return 1;
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}
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EMSCRIPTEN_KEEPALIVE inline char const *emscripten_browser_clipboard_detail_copy_return(copy_handler callback, void *callback_data);
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EMSCRIPTEN_KEEPALIVE inline char const *emscripten_browser_clipboard_detail_copy_return(copy_handler callback, void *callback_data) {
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/// Call paste callback - this function is called from javascript when the paste event occurs
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return callback(callback_data);
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}
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}
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} // namespace detail
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} // namespace emscripten_browser_clipboard
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