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SDL_emscriptenevents.c
733 lines (631 loc) · 26.5 KB
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/*
Simple DirectMedia Layer
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Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../../SDL_internal.h"
#if SDL_VIDEO_DRIVER_EMSCRIPTEN
#include <emscripten/html5.h>
#include "../../events/SDL_events_c.h"
#include "../../events/SDL_keyboard_c.h"
#include "../../events/SDL_touch_c.h"
#include "SDL_emscriptenevents.h"
#include "SDL_emscriptenvideo.h"
#include "SDL_hints.h"
#define FULLSCREEN_MASK ( SDL_WINDOW_FULLSCREEN_DESKTOP | SDL_WINDOW_FULLSCREEN )
/*
.keyCode to scancode
https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent
https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/keyCode
*/
static const SDL_Scancode emscripten_scancode_table[] = {
/* 0 */ SDL_SCANCODE_UNKNOWN,
/* 1 */ SDL_SCANCODE_UNKNOWN,
/* 2 */ SDL_SCANCODE_UNKNOWN,
/* 3 */ SDL_SCANCODE_CANCEL,
/* 4 */ SDL_SCANCODE_UNKNOWN,
/* 5 */ SDL_SCANCODE_UNKNOWN,
/* 6 */ SDL_SCANCODE_HELP,
/* 7 */ SDL_SCANCODE_UNKNOWN,
/* 8 */ SDL_SCANCODE_BACKSPACE,
/* 9 */ SDL_SCANCODE_TAB,
/* 10 */ SDL_SCANCODE_UNKNOWN,
/* 11 */ SDL_SCANCODE_UNKNOWN,
/* 12 */ SDL_SCANCODE_UNKNOWN,
/* 13 */ SDL_SCANCODE_RETURN,
/* 14 */ SDL_SCANCODE_UNKNOWN,
/* 15 */ SDL_SCANCODE_UNKNOWN,
/* 16 */ SDL_SCANCODE_LSHIFT,
/* 17 */ SDL_SCANCODE_LCTRL,
/* 18 */ SDL_SCANCODE_LALT,
/* 19 */ SDL_SCANCODE_PAUSE,
/* 20 */ SDL_SCANCODE_CAPSLOCK,
/* 21 */ SDL_SCANCODE_UNKNOWN,
/* 22 */ SDL_SCANCODE_UNKNOWN,
/* 23 */ SDL_SCANCODE_UNKNOWN,
/* 24 */ SDL_SCANCODE_UNKNOWN,
/* 25 */ SDL_SCANCODE_UNKNOWN,
/* 26 */ SDL_SCANCODE_UNKNOWN,
/* 27 */ SDL_SCANCODE_ESCAPE,
/* 28 */ SDL_SCANCODE_UNKNOWN,
/* 29 */ SDL_SCANCODE_UNKNOWN,
/* 30 */ SDL_SCANCODE_UNKNOWN,
/* 31 */ SDL_SCANCODE_UNKNOWN,
/* 32 */ SDL_SCANCODE_SPACE,
/* 33 */ SDL_SCANCODE_PAGEUP,
/* 34 */ SDL_SCANCODE_PAGEDOWN,
/* 35 */ SDL_SCANCODE_END,
/* 36 */ SDL_SCANCODE_HOME,
/* 37 */ SDL_SCANCODE_LEFT,
/* 38 */ SDL_SCANCODE_UP,
/* 39 */ SDL_SCANCODE_RIGHT,
/* 40 */ SDL_SCANCODE_DOWN,
/* 41 */ SDL_SCANCODE_UNKNOWN,
/* 42 */ SDL_SCANCODE_UNKNOWN,
/* 43 */ SDL_SCANCODE_UNKNOWN,
/* 44 */ SDL_SCANCODE_UNKNOWN,
/* 45 */ SDL_SCANCODE_INSERT,
/* 46 */ SDL_SCANCODE_DELETE,
/* 47 */ SDL_SCANCODE_UNKNOWN,
/* 48 */ SDL_SCANCODE_0,
/* 49 */ SDL_SCANCODE_1,
/* 50 */ SDL_SCANCODE_2,
/* 51 */ SDL_SCANCODE_3,
/* 52 */ SDL_SCANCODE_4,
/* 53 */ SDL_SCANCODE_5,
/* 54 */ SDL_SCANCODE_6,
/* 55 */ SDL_SCANCODE_7,
/* 56 */ SDL_SCANCODE_8,
/* 57 */ SDL_SCANCODE_9,
/* 58 */ SDL_SCANCODE_UNKNOWN,
/* 59 */ SDL_SCANCODE_SEMICOLON,
/* 60 */ SDL_SCANCODE_UNKNOWN,
/* 61 */ SDL_SCANCODE_EQUALS,
/* 62 */ SDL_SCANCODE_UNKNOWN,
/* 63 */ SDL_SCANCODE_UNKNOWN,
/* 64 */ SDL_SCANCODE_UNKNOWN,
/* 65 */ SDL_SCANCODE_A,
/* 66 */ SDL_SCANCODE_B,
/* 67 */ SDL_SCANCODE_C,
/* 68 */ SDL_SCANCODE_D,
/* 69 */ SDL_SCANCODE_E,
/* 70 */ SDL_SCANCODE_F,
/* 71 */ SDL_SCANCODE_G,
/* 72 */ SDL_SCANCODE_H,
/* 73 */ SDL_SCANCODE_I,
/* 74 */ SDL_SCANCODE_J,
/* 75 */ SDL_SCANCODE_K,
/* 76 */ SDL_SCANCODE_L,
/* 77 */ SDL_SCANCODE_M,
/* 78 */ SDL_SCANCODE_N,
/* 79 */ SDL_SCANCODE_O,
/* 80 */ SDL_SCANCODE_P,
/* 81 */ SDL_SCANCODE_Q,
/* 82 */ SDL_SCANCODE_R,
/* 83 */ SDL_SCANCODE_S,
/* 84 */ SDL_SCANCODE_T,
/* 85 */ SDL_SCANCODE_U,
/* 86 */ SDL_SCANCODE_V,
/* 87 */ SDL_SCANCODE_W,
/* 88 */ SDL_SCANCODE_X,
/* 89 */ SDL_SCANCODE_Y,
/* 90 */ SDL_SCANCODE_Z,
/* 91 */ SDL_SCANCODE_LGUI,
/* 92 */ SDL_SCANCODE_UNKNOWN,
/* 93 */ SDL_SCANCODE_APPLICATION,
/* 94 */ SDL_SCANCODE_UNKNOWN,
/* 95 */ SDL_SCANCODE_UNKNOWN,
/* 96 */ SDL_SCANCODE_KP_0,
/* 97 */ SDL_SCANCODE_KP_1,
/* 98 */ SDL_SCANCODE_KP_2,
/* 99 */ SDL_SCANCODE_KP_3,
/* 100 */ SDL_SCANCODE_KP_4,
/* 101 */ SDL_SCANCODE_KP_5,
/* 102 */ SDL_SCANCODE_KP_6,
/* 103 */ SDL_SCANCODE_KP_7,
/* 104 */ SDL_SCANCODE_KP_8,
/* 105 */ SDL_SCANCODE_KP_9,
/* 106 */ SDL_SCANCODE_KP_MULTIPLY,
/* 107 */ SDL_SCANCODE_KP_PLUS,
/* 108 */ SDL_SCANCODE_UNKNOWN,
/* 109 */ SDL_SCANCODE_KP_MINUS,
/* 110 */ SDL_SCANCODE_KP_PERIOD,
/* 111 */ SDL_SCANCODE_KP_DIVIDE,
/* 112 */ SDL_SCANCODE_F1,
/* 113 */ SDL_SCANCODE_F2,
/* 114 */ SDL_SCANCODE_F3,
/* 115 */ SDL_SCANCODE_F4,
/* 116 */ SDL_SCANCODE_F5,
/* 117 */ SDL_SCANCODE_F6,
/* 118 */ SDL_SCANCODE_F7,
/* 119 */ SDL_SCANCODE_F8,
/* 120 */ SDL_SCANCODE_F9,
/* 121 */ SDL_SCANCODE_F10,
/* 122 */ SDL_SCANCODE_F11,
/* 123 */ SDL_SCANCODE_F12,
/* 124 */ SDL_SCANCODE_F13,
/* 125 */ SDL_SCANCODE_F14,
/* 126 */ SDL_SCANCODE_F15,
/* 127 */ SDL_SCANCODE_F16,
/* 128 */ SDL_SCANCODE_F17,
/* 129 */ SDL_SCANCODE_F18,
/* 130 */ SDL_SCANCODE_F19,
/* 131 */ SDL_SCANCODE_F20,
/* 132 */ SDL_SCANCODE_F21,
/* 133 */ SDL_SCANCODE_F22,
/* 134 */ SDL_SCANCODE_F23,
/* 135 */ SDL_SCANCODE_F24,
/* 136 */ SDL_SCANCODE_UNKNOWN,
/* 137 */ SDL_SCANCODE_UNKNOWN,
/* 138 */ SDL_SCANCODE_UNKNOWN,
/* 139 */ SDL_SCANCODE_UNKNOWN,
/* 140 */ SDL_SCANCODE_UNKNOWN,
/* 141 */ SDL_SCANCODE_UNKNOWN,
/* 142 */ SDL_SCANCODE_UNKNOWN,
/* 143 */ SDL_SCANCODE_UNKNOWN,
/* 144 */ SDL_SCANCODE_NUMLOCKCLEAR,
/* 145 */ SDL_SCANCODE_SCROLLLOCK,
/* 146 */ SDL_SCANCODE_UNKNOWN,
/* 147 */ SDL_SCANCODE_UNKNOWN,
/* 148 */ SDL_SCANCODE_UNKNOWN,
/* 149 */ SDL_SCANCODE_UNKNOWN,
/* 150 */ SDL_SCANCODE_UNKNOWN,
/* 151 */ SDL_SCANCODE_UNKNOWN,
/* 152 */ SDL_SCANCODE_UNKNOWN,
/* 153 */ SDL_SCANCODE_UNKNOWN,
/* 154 */ SDL_SCANCODE_UNKNOWN,
/* 155 */ SDL_SCANCODE_UNKNOWN,
/* 156 */ SDL_SCANCODE_UNKNOWN,
/* 157 */ SDL_SCANCODE_UNKNOWN,
/* 158 */ SDL_SCANCODE_UNKNOWN,
/* 159 */ SDL_SCANCODE_UNKNOWN,
/* 160 */ SDL_SCANCODE_UNKNOWN,
/* 161 */ SDL_SCANCODE_UNKNOWN,
/* 162 */ SDL_SCANCODE_UNKNOWN,
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/* 163 */ SDL_SCANCODE_KP_HASH, /*KaiOS phone keypad*/
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/* 164 */ SDL_SCANCODE_UNKNOWN,
/* 165 */ SDL_SCANCODE_UNKNOWN,
/* 166 */ SDL_SCANCODE_UNKNOWN,
/* 167 */ SDL_SCANCODE_UNKNOWN,
/* 168 */ SDL_SCANCODE_UNKNOWN,
/* 169 */ SDL_SCANCODE_UNKNOWN,
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/* 170 */ SDL_SCANCODE_KP_MULTIPLY, /*KaiOS phone keypad*/
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/* 171 */ SDL_SCANCODE_UNKNOWN,
/* 172 */ SDL_SCANCODE_UNKNOWN,
/* 173 */ SDL_SCANCODE_MINUS, /*FX*/
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/* 174 */ SDL_SCANCODE_VOLUMEDOWN, /*IE, Chrome*/
/* 175 */ SDL_SCANCODE_VOLUMEUP, /*IE, Chrome*/
/* 176 */ SDL_SCANCODE_AUDIONEXT, /*IE, Chrome*/
/* 177 */ SDL_SCANCODE_AUDIOPREV, /*IE, Chrome*/
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/* 178 */ SDL_SCANCODE_UNKNOWN,
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/* 179 */ SDL_SCANCODE_AUDIOPLAY, /*IE, Chrome*/
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/* 180 */ SDL_SCANCODE_UNKNOWN,
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/* 181 */ SDL_SCANCODE_AUDIOMUTE, /*FX*/
/* 182 */ SDL_SCANCODE_VOLUMEDOWN, /*FX*/
/* 183 */ SDL_SCANCODE_VOLUMEUP, /*FX*/
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/* 184 */ SDL_SCANCODE_UNKNOWN,
/* 185 */ SDL_SCANCODE_UNKNOWN,
/* 186 */ SDL_SCANCODE_SEMICOLON, /*IE, Chrome, D3E legacy*/
/* 187 */ SDL_SCANCODE_EQUALS, /*IE, Chrome, D3E legacy*/
/* 188 */ SDL_SCANCODE_COMMA,
/* 189 */ SDL_SCANCODE_MINUS, /*IE, Chrome, D3E legacy*/
/* 190 */ SDL_SCANCODE_PERIOD,
/* 191 */ SDL_SCANCODE_SLASH,
/* 192 */ SDL_SCANCODE_GRAVE, /*FX, D3E legacy (SDL_SCANCODE_APOSTROPHE in IE/Chrome)*/
/* 193 */ SDL_SCANCODE_UNKNOWN,
/* 194 */ SDL_SCANCODE_UNKNOWN,
/* 195 */ SDL_SCANCODE_UNKNOWN,
/* 196 */ SDL_SCANCODE_UNKNOWN,
/* 197 */ SDL_SCANCODE_UNKNOWN,
/* 198 */ SDL_SCANCODE_UNKNOWN,
/* 199 */ SDL_SCANCODE_UNKNOWN,
/* 200 */ SDL_SCANCODE_UNKNOWN,
/* 201 */ SDL_SCANCODE_UNKNOWN,
/* 202 */ SDL_SCANCODE_UNKNOWN,
/* 203 */ SDL_SCANCODE_UNKNOWN,
/* 204 */ SDL_SCANCODE_UNKNOWN,
/* 205 */ SDL_SCANCODE_UNKNOWN,
/* 206 */ SDL_SCANCODE_UNKNOWN,
/* 207 */ SDL_SCANCODE_UNKNOWN,
/* 208 */ SDL_SCANCODE_UNKNOWN,
/* 209 */ SDL_SCANCODE_UNKNOWN,
/* 210 */ SDL_SCANCODE_UNKNOWN,
/* 211 */ SDL_SCANCODE_UNKNOWN,
/* 212 */ SDL_SCANCODE_UNKNOWN,
/* 213 */ SDL_SCANCODE_UNKNOWN,
/* 214 */ SDL_SCANCODE_UNKNOWN,
/* 215 */ SDL_SCANCODE_UNKNOWN,
/* 216 */ SDL_SCANCODE_UNKNOWN,
/* 217 */ SDL_SCANCODE_UNKNOWN,
/* 218 */ SDL_SCANCODE_UNKNOWN,
/* 219 */ SDL_SCANCODE_LEFTBRACKET,
/* 220 */ SDL_SCANCODE_BACKSLASH,
/* 221 */ SDL_SCANCODE_RIGHTBRACKET,
/* 222 */ SDL_SCANCODE_APOSTROPHE, /*FX, D3E legacy*/
};
/* "borrowed" from SDL_windowsevents.c */
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static int
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Emscripten_ConvertUTF32toUTF8(Uint32 codepoint, char * text)
{
if (codepoint <= 0x7F) {
text[0] = (char) codepoint;
text[1] = '\0';
} else if (codepoint <= 0x7FF) {
text[0] = 0xC0 | (char) ((codepoint >> 6) & 0x1F);
text[1] = 0x80 | (char) (codepoint & 0x3F);
text[2] = '\0';
} else if (codepoint <= 0xFFFF) {
text[0] = 0xE0 | (char) ((codepoint >> 12) & 0x0F);
text[1] = 0x80 | (char) ((codepoint >> 6) & 0x3F);
text[2] = 0x80 | (char) (codepoint & 0x3F);
text[3] = '\0';
} else if (codepoint <= 0x10FFFF) {
text[0] = 0xF0 | (char) ((codepoint >> 18) & 0x0F);
text[1] = 0x80 | (char) ((codepoint >> 12) & 0x3F);
text[2] = 0x80 | (char) ((codepoint >> 6) & 0x3F);
text[3] = 0x80 | (char) (codepoint & 0x3F);
text[4] = '\0';
} else {
return SDL_FALSE;
}
return SDL_TRUE;
}
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static EM_BOOL
Emscripten_HandlePointerLockChange(int eventType, const EmscriptenPointerlockChangeEvent *changeEvent, void *userData)
{
SDL_WindowData *window_data = (SDL_WindowData *) userData;
/* keep track of lock losses, so we can regrab if/when appropriate. */
window_data->has_pointer_lock = changeEvent->isActive;
return 0;
}
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static EM_BOOL
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Emscripten_HandleMouseMove(int eventType, const EmscriptenMouseEvent *mouseEvent, void *userData)
{
SDL_WindowData *window_data = userData;
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const int isPointerLocked = window_data->has_pointer_lock;
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int mx, my;
static double residualx = 0, residualy = 0;
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/* rescale (in case canvas is being scaled)*/
double client_w, client_h, xscale, yscale;
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emscripten_get_element_css_size(window_data->canvas_id, &client_w, &client_h);
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xscale = window_data->window->w / client_w;
yscale = window_data->window->h / client_h;
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if (isPointerLocked) {
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residualx += mouseEvent->movementX * xscale;
residualy += mouseEvent->movementY * yscale;
/* Let slow sub-pixel motion accumulate. Don't lose it. */
mx = residualx;
residualx -= mx;
my = residualy;
residualy -= my;
} else {
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mx = mouseEvent->targetX * xscale;
my = mouseEvent->targetY * yscale;
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}
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SDL_SendMouseMotion(window_data->window, 0, isPointerLocked, mx, my);
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return 0;
}
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static EM_BOOL
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Emscripten_HandleMouseButton(int eventType, const EmscriptenMouseEvent *mouseEvent, void *userData)
{
SDL_WindowData *window_data = userData;
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Uint8 sdl_button;
Uint8 sdl_button_state;
SDL_EventType sdl_event_type;
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double css_w, css_h;
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switch (mouseEvent->button) {
case 0:
sdl_button = SDL_BUTTON_LEFT;
break;
case 1:
sdl_button = SDL_BUTTON_MIDDLE;
break;
case 2:
sdl_button = SDL_BUTTON_RIGHT;
break;
default:
return 0;
}
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if (eventType == EMSCRIPTEN_EVENT_MOUSEDOWN) {
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if (SDL_GetMouse()->relative_mode && !window_data->has_pointer_lock) {
emscripten_request_pointerlock(NULL, 0); /* try to regrab lost pointer lock. */
}
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sdl_button_state = SDL_PRESSED;
sdl_event_type = SDL_MOUSEBUTTONDOWN;
} else {
sdl_button_state = SDL_RELEASED;
sdl_event_type = SDL_MOUSEBUTTONUP;
}
SDL_SendMouseButton(window_data->window, 0, sdl_button_state, sdl_button);
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/* Do not consume the event if the mouse is outside of the canvas. */
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emscripten_get_element_css_size(window_data->canvas_id, &css_w, &css_h);
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if (mouseEvent->targetX < 0 || mouseEvent->targetX >= css_w ||
mouseEvent->targetY < 0 || mouseEvent->targetY >= css_h) {
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return 0;
}
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return SDL_GetEventState(sdl_event_type) == SDL_ENABLE;
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}
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static EM_BOOL
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Emscripten_HandleMouseFocus(int eventType, const EmscriptenMouseEvent *mouseEvent, void *userData)
{
SDL_WindowData *window_data = userData;
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int mx = mouseEvent->targetX, my = mouseEvent->targetY;
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const int isPointerLocked = window_data->has_pointer_lock;
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if (!isPointerLocked) {
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/* rescale (in case canvas is being scaled)*/
double client_w, client_h;
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emscripten_get_element_css_size(window_data->canvas_id, &client_w, &client_h);
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mx = mx * (window_data->window->w / client_w);
my = my * (window_data->window->h / client_h);
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SDL_SendMouseMotion(window_data->window, 0, isPointerLocked, mx, my);
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}
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SDL_SetMouseFocus(eventType == EMSCRIPTEN_EVENT_MOUSEENTER ? window_data->window : NULL);
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return SDL_GetEventState(SDL_WINDOWEVENT) == SDL_ENABLE;
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}
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static EM_BOOL
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Emscripten_HandleWheel(int eventType, const EmscriptenWheelEvent *wheelEvent, void *userData)
{
SDL_WindowData *window_data = userData;
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SDL_SendMouseWheel(window_data->window, 0, (float)wheelEvent->deltaX, (float)-wheelEvent->deltaY, SDL_MOUSEWHEEL_NORMAL);
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return SDL_GetEventState(SDL_MOUSEWHEEL) == SDL_ENABLE;
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}
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static EM_BOOL
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Emscripten_HandleFocus(int eventType, const EmscriptenFocusEvent *wheelEvent, void *userData)
{
SDL_WindowData *window_data = userData;
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/* If the user switches away while keys are pressed (such as
* via Alt+Tab), key release events won't be received. */
if (eventType == EMSCRIPTEN_EVENT_BLUR) {
SDL_ResetKeyboard();
}
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SDL_SendWindowEvent(window_data->window, eventType == EMSCRIPTEN_EVENT_FOCUS ? SDL_WINDOWEVENT_FOCUS_GAINED : SDL_WINDOWEVENT_FOCUS_LOST, 0, 0);
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return SDL_GetEventState(SDL_WINDOWEVENT) == SDL_ENABLE;
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}
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static EM_BOOL
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Emscripten_HandleTouch(int eventType, const EmscriptenTouchEvent *touchEvent, void *userData)
{
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SDL_WindowData *window_data = (SDL_WindowData *) userData;
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int i;
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double client_w, client_h;
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int preventDefault = 0;
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SDL_TouchID deviceId = 1;
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if (SDL_AddTouch(deviceId, SDL_TOUCH_DEVICE_DIRECT, "") < 0) {
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return 0;
}
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emscripten_get_element_css_size(window_data->canvas_id, &client_w, &client_h);
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for (i = 0; i < touchEvent->numTouches; i++) {
SDL_FingerID id;
float x, y;
if (!touchEvent->touches[i].isChanged)
continue;
id = touchEvent->touches[i].identifier;
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x = touchEvent->touches[i].targetX / client_w;
y = touchEvent->touches[i].targetY / client_h;
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if (eventType == EMSCRIPTEN_EVENT_TOUCHSTART) {
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SDL_SendTouch(deviceId, id, window_data->window, SDL_TRUE, x, y, 1.0f);
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/* disable browser scrolling/pinch-to-zoom if app handles touch events */
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if (!preventDefault && SDL_GetEventState(SDL_FINGERDOWN) == SDL_ENABLE) {
preventDefault = 1;
}
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} else if (eventType == EMSCRIPTEN_EVENT_TOUCHMOVE) {
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SDL_SendTouchMotion(deviceId, id, window_data->window, x, y, 1.0f);
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} else {
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SDL_SendTouch(deviceId, id, window_data->window, SDL_FALSE, x, y, 1.0f);
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/* block browser's simulated mousedown/mouseup on touchscreen devices */
preventDefault = 1;
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}
}
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return preventDefault;
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}
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static EM_BOOL
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Emscripten_HandleKey(int eventType, const EmscriptenKeyboardEvent *keyEvent, void *userData)
{
Uint32 scancode;
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SDL_bool prevent_default;
SDL_bool is_nav_key;
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/* .keyCode is deprecated, but still the most reliable way to get keys */
if (keyEvent->keyCode < SDL_arraysize(emscripten_scancode_table)) {
scancode = emscripten_scancode_table[keyEvent->keyCode];
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if (keyEvent->keyCode == 0) {
/* KaiOS Left Soft Key and Right Soft Key, they act as OK/Next/Menu and Cancel/Back/Clear */
if (SDL_strncmp(keyEvent->key, "SoftLeft", 9) == 0) {
scancode = SDL_SCANCODE_AC_FORWARD;
}
if (SDL_strncmp(keyEvent->key, "SoftRight", 10) == 0) {
scancode = SDL_SCANCODE_AC_BACK;
}
}
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if (scancode != SDL_SCANCODE_UNKNOWN) {
if (keyEvent->location == DOM_KEY_LOCATION_RIGHT) {
switch (scancode) {
case SDL_SCANCODE_LSHIFT:
scancode = SDL_SCANCODE_RSHIFT;
break;
case SDL_SCANCODE_LCTRL:
scancode = SDL_SCANCODE_RCTRL;
break;
case SDL_SCANCODE_LALT:
scancode = SDL_SCANCODE_RALT;
break;
case SDL_SCANCODE_LGUI:
scancode = SDL_SCANCODE_RGUI;
break;
}
}
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SDL_SendKeyboardKey(eventType == EMSCRIPTEN_EVENT_KEYDOWN ? SDL_PRESSED : SDL_RELEASED, scancode);
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}
}
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prevent_default = SDL_GetEventState(eventType == EMSCRIPTEN_EVENT_KEYDOWN ? SDL_KEYDOWN : SDL_KEYUP) == SDL_ENABLE;
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/* if TEXTINPUT events are enabled we can't prevent keydown or we won't get keypress
* we need to ALWAYS prevent backspace and tab otherwise chrome takes action and does bad navigation UX
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*/
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is_nav_key = keyEvent->keyCode == 8 /* backspace */ ||
keyEvent->keyCode == 9 /* tab */ ||
keyEvent->keyCode == 37 /* left */ ||
keyEvent->keyCode == 38 /* up */ ||
keyEvent->keyCode == 39 /* right */ ||
keyEvent->keyCode == 40 /* down */;
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if (eventType == EMSCRIPTEN_EVENT_KEYDOWN && SDL_GetEventState(SDL_TEXTINPUT) == SDL_ENABLE && !is_nav_key)
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prevent_default = SDL_FALSE;
return prevent_default;
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}
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static EM_BOOL
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Emscripten_HandleKeyPress(int eventType, const EmscriptenKeyboardEvent *keyEvent, void *userData)
{
char text[5];
if (Emscripten_ConvertUTF32toUTF8(keyEvent->charCode, text)) {
SDL_SendKeyboardText(text);
}
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return SDL_GetEventState(SDL_TEXTINPUT) == SDL_ENABLE;
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}
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static EM_BOOL
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Emscripten_HandleFullscreenChange(int eventType, const EmscriptenFullscreenChangeEvent *fullscreenChangeEvent, void *userData)
{
SDL_WindowData *window_data = userData;
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SDL_VideoDisplay *display;
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if(fullscreenChangeEvent->isFullscreen)
{
window_data->window->flags |= window_data->requested_fullscreen_mode;
window_data->requested_fullscreen_mode = 0;
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if(!window_data->requested_fullscreen_mode)
window_data->window->flags |= SDL_WINDOW_FULLSCREEN; /*we didn't reqest fullscreen*/
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}
else
{
window_data->window->flags &= ~FULLSCREEN_MASK;
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/* reset fullscreen window if the browser left fullscreen */
display = SDL_GetDisplayForWindow(window_data->window);
if (display->fullscreen_window == window_data->window) {
display->fullscreen_window = NULL;
}
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}
return 0;
}
578
static EM_BOOL
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Emscripten_HandleResize(int eventType, const EmscriptenUiEvent *uiEvent, void *userData)
{
SDL_WindowData *window_data = userData;
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SDL_bool force = SDL_FALSE;
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/* update pixel ratio */
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if (window_data->window->flags & SDL_WINDOW_ALLOW_HIGHDPI) {
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if (window_data->pixel_ratio != emscripten_get_device_pixel_ratio()) {
window_data->pixel_ratio = emscripten_get_device_pixel_ratio();
force = SDL_TRUE;
}
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}
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if(!(window_data->window->flags & FULLSCREEN_MASK))
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{
/* this will only work if the canvas size is set through css */
if(window_data->window->flags & SDL_WINDOW_RESIZABLE)
{
double w = window_data->window->w;
double h = window_data->window->h;
if(window_data->external_size) {
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emscripten_get_element_css_size(window_data->canvas_id, &w, &h);
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}
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emscripten_set_canvas_element_size(window_data->canvas_id, w * window_data->pixel_ratio, h * window_data->pixel_ratio);
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/* set_canvas_size unsets this */
if (!window_data->external_size && window_data->pixel_ratio != 1.0f) {
608
emscripten_set_element_css_size(window_data->canvas_id, w, h);
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}
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if (force) {
/* force the event to trigger, so pixel ratio changes can be handled */
window_data->window->w = 0;
window_data->window->h = 0;
}
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SDL_SendWindowEvent(window_data->window, SDL_WINDOWEVENT_RESIZED, w, h);
}
}
return 0;
}
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632
EM_BOOL
Emscripten_HandleCanvasResize(int eventType, const void *reserved, void *userData)
{
/*this is used during fullscreen changes*/
SDL_WindowData *window_data = userData;
if(window_data->fullscreen_resize)
{
double css_w, css_h;
633
emscripten_get_element_css_size(window_data->canvas_id, &css_w, &css_h);
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639
SDL_SendWindowEvent(window_data->window, SDL_WINDOWEVENT_RESIZED, css_w, css_h);
}
return 0;
}
640
static EM_BOOL
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649
650
Emscripten_HandleVisibilityChange(int eventType, const EmscriptenVisibilityChangeEvent *visEvent, void *userData)
{
SDL_WindowData *window_data = userData;
SDL_SendWindowEvent(window_data->window, visEvent->hidden ? SDL_WINDOWEVENT_HIDDEN : SDL_WINDOWEVENT_SHOWN, 0, 0);
return 0;
}
void
Emscripten_RegisterEventHandlers(SDL_WindowData *data)
{
651
652
const char *keyElement;
653
/* There is only one window and that window is the canvas */
654
emscripten_set_mousemove_callback(data->canvas_id, data, 0, Emscripten_HandleMouseMove);
655
656
emscripten_set_mousedown_callback(data->canvas_id, data, 0, Emscripten_HandleMouseButton);
657
emscripten_set_mouseup_callback(EMSCRIPTEN_EVENT_TARGET_DOCUMENT, data, 0, Emscripten_HandleMouseButton);
658
659
660
emscripten_set_mouseenter_callback(data->canvas_id, data, 0, Emscripten_HandleMouseFocus);
emscripten_set_mouseleave_callback(data->canvas_id, data, 0, Emscripten_HandleMouseFocus);
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emscripten_set_wheel_callback(data->canvas_id, data, 0, Emscripten_HandleWheel);
663
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665
emscripten_set_focus_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, data, 0, Emscripten_HandleFocus);
emscripten_set_blur_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, data, 0, Emscripten_HandleFocus);
666
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670
emscripten_set_touchstart_callback(data->canvas_id, data, 0, Emscripten_HandleTouch);
emscripten_set_touchend_callback(data->canvas_id, data, 0, Emscripten_HandleTouch);
emscripten_set_touchmove_callback(data->canvas_id, data, 0, Emscripten_HandleTouch);
emscripten_set_touchcancel_callback(data->canvas_id, data, 0, Emscripten_HandleTouch);
671
672
emscripten_set_pointerlockchange_callback(EMSCRIPTEN_EVENT_TARGET_DOCUMENT, data, 0, Emscripten_HandlePointerLockChange);
673
674
/* Keyboard events are awkward */
675
keyElement = SDL_GetHint(SDL_HINT_EMSCRIPTEN_KEYBOARD_ELEMENT);
676
if (!keyElement) keyElement = EMSCRIPTEN_EVENT_TARGET_WINDOW;
677
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679
680
681
emscripten_set_keydown_callback(keyElement, data, 0, Emscripten_HandleKey);
emscripten_set_keyup_callback(keyElement, data, 0, Emscripten_HandleKey);
emscripten_set_keypress_callback(keyElement, data, 0, Emscripten_HandleKeyPress);
682
emscripten_set_fullscreenchange_callback(EMSCRIPTEN_EVENT_TARGET_DOCUMENT, data, 0, Emscripten_HandleFullscreenChange);
683
684
emscripten_set_resize_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, data, 0, Emscripten_HandleResize);
685
686
687
688
689
690
691
emscripten_set_visibilitychange_callback(data, 0, Emscripten_HandleVisibilityChange);
}
void
Emscripten_UnregisterEventHandlers(SDL_WindowData *data)
{
692
693
const char *target;
694
/* only works due to having one window */
695
emscripten_set_mousemove_callback(data->canvas_id, NULL, 0, NULL);
696
697
emscripten_set_mousedown_callback(data->canvas_id, NULL, 0, NULL);
698
emscripten_set_mouseup_callback(EMSCRIPTEN_EVENT_TARGET_DOCUMENT, NULL, 0, NULL);
699
700
701
emscripten_set_mouseenter_callback(data->canvas_id, NULL, 0, NULL);
emscripten_set_mouseleave_callback(data->canvas_id, NULL, 0, NULL);
702
703
emscripten_set_wheel_callback(data->canvas_id, NULL, 0, NULL);
704
705
706
emscripten_set_focus_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, NULL, 0, NULL);
emscripten_set_blur_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, NULL, 0, NULL);
707
708
709
710
711
emscripten_set_touchstart_callback(data->canvas_id, NULL, 0, NULL);
emscripten_set_touchend_callback(data->canvas_id, NULL, 0, NULL);
emscripten_set_touchmove_callback(data->canvas_id, NULL, 0, NULL);
emscripten_set_touchcancel_callback(data->canvas_id, NULL, 0, NULL);
712
713
emscripten_set_pointerlockchange_callback(EMSCRIPTEN_EVENT_TARGET_DOCUMENT, NULL, 0, NULL);
714
715
target = SDL_GetHint(SDL_HINT_EMSCRIPTEN_KEYBOARD_ELEMENT);
716
if (!target) {
717
target = EMSCRIPTEN_EVENT_TARGET_WINDOW;
718
719
720
721
722
723
}
emscripten_set_keydown_callback(target, NULL, 0, NULL);
emscripten_set_keyup_callback(target, NULL, 0, NULL);
emscripten_set_keypress_callback(target, NULL, 0, NULL);
724
emscripten_set_fullscreenchange_callback(EMSCRIPTEN_EVENT_TARGET_DOCUMENT, NULL, 0, NULL);
725
726
emscripten_set_resize_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, NULL, 0, NULL);
727
728
729
730
731
732
733
emscripten_set_visibilitychange_callback(NULL, 0, NULL);
}
#endif /* SDL_VIDEO_DRIVER_EMSCRIPTEN */
/* vi: set ts=4 sw=4 expandtab: */