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| 1 | +/* |
| 2 | + * Copyright 2025 The Emscripten Authors. All rights reserved. |
| 3 | + * Emscripten is available under two separate licenses, the MIT license and the |
| 4 | + * University of Illinois/NCSA Open Source License. Both these licenses can be |
| 5 | + * found in the LICENSE file. |
| 6 | + */ |
| 7 | + |
| 8 | +#include <assert.h> |
| 9 | +#include <stdio.h> |
| 10 | +#include <emscripten.h> |
| 11 | +#include <string.h> |
| 12 | +#include <emscripten/html5.h> |
| 13 | + |
| 14 | +const char *emscripten_result_to_string(EMSCRIPTEN_RESULT result) { |
| 15 | + if (result == EMSCRIPTEN_RESULT_SUCCESS) return "EMSCRIPTEN_RESULT_SUCCESS"; |
| 16 | + if (result == EMSCRIPTEN_RESULT_DEFERRED) return "EMSCRIPTEN_RESULT_DEFERRED"; |
| 17 | + if (result == EMSCRIPTEN_RESULT_NOT_SUPPORTED) return "EMSCRIPTEN_RESULT_NOT_SUPPORTED"; |
| 18 | + if (result == EMSCRIPTEN_RESULT_FAILED_NOT_DEFERRED) return "EMSCRIPTEN_RESULT_FAILED_NOT_DEFERRED"; |
| 19 | + if (result == EMSCRIPTEN_RESULT_INVALID_TARGET) return "EMSCRIPTEN_RESULT_INVALID_TARGET"; |
| 20 | + if (result == EMSCRIPTEN_RESULT_UNKNOWN_TARGET) return "EMSCRIPTEN_RESULT_UNKNOWN_TARGET"; |
| 21 | + if (result == EMSCRIPTEN_RESULT_INVALID_PARAM) return "EMSCRIPTEN_RESULT_INVALID_PARAM"; |
| 22 | + if (result == EMSCRIPTEN_RESULT_FAILED) return "EMSCRIPTEN_RESULT_FAILED"; |
| 23 | + if (result == EMSCRIPTEN_RESULT_NO_DATA) return "EMSCRIPTEN_RESULT_NO_DATA"; |
| 24 | + return "Unknown EMSCRIPTEN_RESULT!"; |
| 25 | +} |
| 26 | + |
| 27 | +// Report API failure |
| 28 | +#define TEST_RESULT(x) if (ret != EMSCRIPTEN_RESULT_SUCCESS) printf("%s returned %s.\n", #x, emscripten_result_to_string(ret)); |
| 29 | + |
| 30 | +// Like above above but also assert API success |
| 31 | +#define ASSERT_RESULT(x) TEST_RESULT(x); assert(ret == EMSCRIPTEN_RESULT_SUCCESS); |
| 32 | + |
| 33 | +char const *userDataToString(void *userData) { |
| 34 | + return userData ? (char const *) userData : "nullptr"; |
| 35 | +} |
| 36 | + |
| 37 | +bool key_callback_1(int eventType, const EmscriptenKeyboardEvent *e, void *userData) { |
| 38 | + printf("key_callback_1: eventType=%d, userData=%s\n", eventType, userDataToString(userData)); |
| 39 | + return 0; |
| 40 | +} |
| 41 | + |
| 42 | +bool key_callback_2(int eventType, const EmscriptenKeyboardEvent *e, void *userData) { |
| 43 | + printf("key_callback_2: eventType=%d, userData=%s\n", eventType, userDataToString(userData)); |
| 44 | + return 0; |
| 45 | +} |
| 46 | + |
| 47 | +bool mouse_callback_1(int eventType, const EmscriptenMouseEvent *e, void *userData) { |
| 48 | + printf("mouse_callback_1: eventType=%d, userData=%s\n", eventType, userDataToString(userData)); |
| 49 | + return 0; |
| 50 | +} |
| 51 | + |
| 52 | +void checkCount(int count) |
| 53 | +{ |
| 54 | + int eventHandlersCount = EM_ASM_INT({ return JSEvents.eventHandlers.length; }); |
| 55 | + printf("Detected [%d] handlers\n", eventHandlersCount); |
| 56 | + assert(count == eventHandlersCount); |
| 57 | +} |
| 58 | + |
| 59 | +void test_done() {} |
| 60 | + |
| 61 | +int main() { |
| 62 | + bool useCapture = true; |
| 63 | + void *userData3 = "3"; |
| 64 | + |
| 65 | + // first we check for invalid parameters |
| 66 | + assert(emscripten_remove_callback("this_dom_element_does_not_exist", NULL, 0, key_callback_1) == EMSCRIPTEN_RESULT_UNKNOWN_TARGET); |
| 67 | + |
| 68 | + checkCount(0); |
| 69 | + |
| 70 | + EMSCRIPTEN_RESULT ret = emscripten_set_keypress_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, NULL, useCapture, key_callback_1); |
| 71 | + ASSERT_RESULT(emscripten_set_keypress_callback); |
| 72 | + ret = emscripten_set_keydown_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, NULL, useCapture, key_callback_1); |
| 73 | + ASSERT_RESULT(emscripten_set_keydown_callback); |
| 74 | + ret = emscripten_set_keyup_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, NULL, useCapture, key_callback_1); |
| 75 | + ASSERT_RESULT(emscripten_set_keyup_callback); |
| 76 | + |
| 77 | + checkCount(3); |
| 78 | + |
| 79 | + // removing keydown event |
| 80 | + ret = emscripten_remove_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, NULL, EMSCRIPTEN_EVENT_KEYDOWN, key_callback_1); |
| 81 | + ASSERT_RESULT(emscripten_remove_callback); |
| 82 | + |
| 83 | + checkCount(2); |
| 84 | + |
| 85 | + // adding another keypress callback on the same target |
| 86 | + ret = emscripten_set_keypress_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, NULL, useCapture, key_callback_2); |
| 87 | + ASSERT_RESULT(emscripten_set_keypress_callback); |
| 88 | + checkCount(3); |
| 89 | + |
| 90 | + // adding another keypress callback on the same target with different user data |
| 91 | + ret = emscripten_set_keypress_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, userData3, useCapture, key_callback_2); |
| 92 | + ASSERT_RESULT(emscripten_set_keypress_callback); |
| 93 | + |
| 94 | + checkCount(4); |
| 95 | + |
| 96 | + // removing a combination that does not exist (no mouse_callback_1 registered) |
| 97 | + ret = emscripten_remove_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, NULL, EMSCRIPTEN_EVENT_KEYPRESS, mouse_callback_1); |
| 98 | + ASSERT_RESULT(emscripten_remove_callback); |
| 99 | + |
| 100 | + checkCount(4); |
| 101 | + |
| 102 | + // removing keypress / userData=NULL / key_callback_2 |
| 103 | + ret = emscripten_remove_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, NULL, EMSCRIPTEN_EVENT_KEYPRESS, key_callback_2); |
| 104 | + ASSERT_RESULT(emscripten_remove_callback); |
| 105 | + |
| 106 | + checkCount(3); |
| 107 | + |
| 108 | + // removing keypress / userData=NULL / key_callback_1 |
| 109 | + ret = emscripten_remove_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, NULL, EMSCRIPTEN_EVENT_KEYPRESS, key_callback_1); |
| 110 | + ASSERT_RESULT(emscripten_remove_callback); |
| 111 | + |
| 112 | + checkCount(2); |
| 113 | + |
| 114 | + // removing keypress / userData=3 / key_callback_2 |
| 115 | + ret = emscripten_remove_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, userData3, EMSCRIPTEN_EVENT_KEYPRESS, key_callback_2); |
| 116 | + ASSERT_RESULT(emscripten_remove_callback); |
| 117 | + |
| 118 | + checkCount(1); |
| 119 | + |
| 120 | + // adding the same mouse down callback to 2 different targets |
| 121 | + ret = emscripten_set_mousedown_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, NULL, useCapture, mouse_callback_1); |
| 122 | + ASSERT_RESULT(emscripten_set_mousedown_callback); |
| 123 | + ret = emscripten_set_mousedown_callback("#canvas", NULL, useCapture, mouse_callback_1); |
| 124 | + ASSERT_RESULT(emscripten_set_mousedown_callback); |
| 125 | + |
| 126 | + checkCount(3); |
| 127 | + |
| 128 | + // removing mousedown / userData=NULL / mouse_callback_1 on the window target |
| 129 | + ret = emscripten_remove_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, NULL, EMSCRIPTEN_EVENT_MOUSEDOWN, mouse_callback_1); |
| 130 | + ASSERT_RESULT(emscripten_remove_callback); |
| 131 | + |
| 132 | + checkCount(2); |
| 133 | + |
| 134 | + emscripten_async_call(test_done, 0, 5000); |
| 135 | + |
| 136 | + |
| 137 | + return 0; |
| 138 | +} |
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