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RmlUi_Platform_SDL.cpp
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RmlUi_Platform_SDL.cpp
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/*
* This source file is part of RmlUi, the HTML/CSS Interface Middleware
*
* For the latest information, see http://github.com/mikke89/RmlUi
*
* Copyright (c) 2008-2010 CodePoint Ltd, Shift Technology Ltd
* Copyright (c) 2019-2023 The RmlUi Team, and contributors
*
* 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.
*
*/
#include "RmlUi_Platform_SDL.h"
#include <RmlUi/Core/Context.h>
#include <RmlUi/Core/Input.h>
#include <RmlUi/Core/StringUtilities.h>
#include <RmlUi/Core/SystemInterface.h>
#include <SDL.h>
SystemInterface_SDL::SystemInterface_SDL()
{
cursor_default = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_ARROW);
cursor_move = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZEALL);
cursor_pointer = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_HAND);
cursor_resize = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_SIZENWSE);
cursor_cross = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_CROSSHAIR);
cursor_text = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_IBEAM);
cursor_unavailable = SDL_CreateSystemCursor(SDL_SYSTEM_CURSOR_NO);
}
SystemInterface_SDL::~SystemInterface_SDL()
{
SDL_FreeCursor(cursor_default);
SDL_FreeCursor(cursor_move);
SDL_FreeCursor(cursor_pointer);
SDL_FreeCursor(cursor_resize);
SDL_FreeCursor(cursor_cross);
SDL_FreeCursor(cursor_text);
SDL_FreeCursor(cursor_unavailable);
}
void SystemInterface_SDL::SetWindow(SDL_Window* in_window)
{
window = in_window;
}
double SystemInterface_SDL::GetElapsedTime()
{
static const Uint64 start = SDL_GetPerformanceCounter();
static const double frequency = double(SDL_GetPerformanceFrequency());
return double(SDL_GetPerformanceCounter() - start) / frequency;
}
void SystemInterface_SDL::SetMouseCursor(const Rml::String& cursor_name)
{
SDL_Cursor* cursor = nullptr;
if (cursor_name.empty() || cursor_name == "arrow")
cursor = cursor_default;
else if (cursor_name == "move")
cursor = cursor_move;
else if (cursor_name == "pointer")
cursor = cursor_pointer;
else if (cursor_name == "resize")
cursor = cursor_resize;
else if (cursor_name == "cross")
cursor = cursor_cross;
else if (cursor_name == "text")
cursor = cursor_text;
else if (cursor_name == "unavailable")
cursor = cursor_unavailable;
else if (Rml::StringUtilities::StartsWith(cursor_name, "rmlui-scroll"))
cursor = cursor_move;
if (cursor)
SDL_SetCursor(cursor);
}
void SystemInterface_SDL::SetClipboardText(const Rml::String& text_utf8)
{
SDL_SetClipboardText(text_utf8.c_str());
}
void SystemInterface_SDL::GetClipboardText(Rml::String& text)
{
char* raw_text = SDL_GetClipboardText();
text = Rml::String(raw_text);
SDL_free(raw_text);
}
bool RmlSDL::InputEventHandler(Rml::Context* context, SDL_Event& ev)
{
bool result = true;
switch (ev.type)
{
case SDL_MOUSEMOTION: result = context->ProcessMouseMove(ev.motion.x, ev.motion.y, GetKeyModifierState()); break;
case SDL_MOUSEBUTTONDOWN:
result = context->ProcessMouseButtonDown(ConvertMouseButton(ev.button.button), GetKeyModifierState());
SDL_CaptureMouse(SDL_TRUE);
break;
case SDL_MOUSEBUTTONUP:
SDL_CaptureMouse(SDL_FALSE);
result = context->ProcessMouseButtonUp(ConvertMouseButton(ev.button.button), GetKeyModifierState());
break;
case SDL_MOUSEWHEEL: result = context->ProcessMouseWheel(float(-ev.wheel.y), GetKeyModifierState()); break;
case SDL_KEYDOWN:
result = context->ProcessKeyDown(ConvertKey(ev.key.keysym.sym), GetKeyModifierState());
if (ev.key.keysym.sym == SDLK_RETURN || ev.key.keysym.sym == SDLK_KP_ENTER)
result &= context->ProcessTextInput('\n');
break;
case SDL_KEYUP: result = context->ProcessKeyUp(ConvertKey(ev.key.keysym.sym), GetKeyModifierState()); break;
case SDL_TEXTINPUT: result = context->ProcessTextInput(Rml::String(&ev.text.text[0])); break;
case SDL_WINDOWEVENT:
{
switch (ev.window.event)
{
case SDL_WINDOWEVENT_SIZE_CHANGED:
{
Rml::Vector2i dimensions(ev.window.data1, ev.window.data2);
context->SetDimensions(dimensions);
}
break;
case SDL_WINDOWEVENT_LEAVE: context->ProcessMouseLeave(); break;
}
}
break;
default: break;
}
return result;
}
Rml::Input::KeyIdentifier RmlSDL::ConvertKey(int sdlkey)
{
// clang-format off
switch (sdlkey)
{
case SDLK_UNKNOWN: return Rml::Input::KI_UNKNOWN;
case SDLK_ESCAPE: return Rml::Input::KI_ESCAPE;
case SDLK_SPACE: return Rml::Input::KI_SPACE;
case SDLK_0: return Rml::Input::KI_0;
case SDLK_1: return Rml::Input::KI_1;
case SDLK_2: return Rml::Input::KI_2;
case SDLK_3: return Rml::Input::KI_3;
case SDLK_4: return Rml::Input::KI_4;
case SDLK_5: return Rml::Input::KI_5;
case SDLK_6: return Rml::Input::KI_6;
case SDLK_7: return Rml::Input::KI_7;
case SDLK_8: return Rml::Input::KI_8;
case SDLK_9: return Rml::Input::KI_9;
case SDLK_a: return Rml::Input::KI_A;
case SDLK_b: return Rml::Input::KI_B;
case SDLK_c: return Rml::Input::KI_C;
case SDLK_d: return Rml::Input::KI_D;
case SDLK_e: return Rml::Input::KI_E;
case SDLK_f: return Rml::Input::KI_F;
case SDLK_g: return Rml::Input::KI_G;
case SDLK_h: return Rml::Input::KI_H;
case SDLK_i: return Rml::Input::KI_I;
case SDLK_j: return Rml::Input::KI_J;
case SDLK_k: return Rml::Input::KI_K;
case SDLK_l: return Rml::Input::KI_L;
case SDLK_m: return Rml::Input::KI_M;
case SDLK_n: return Rml::Input::KI_N;
case SDLK_o: return Rml::Input::KI_O;
case SDLK_p: return Rml::Input::KI_P;
case SDLK_q: return Rml::Input::KI_Q;
case SDLK_r: return Rml::Input::KI_R;
case SDLK_s: return Rml::Input::KI_S;
case SDLK_t: return Rml::Input::KI_T;
case SDLK_u: return Rml::Input::KI_U;
case SDLK_v: return Rml::Input::KI_V;
case SDLK_w: return Rml::Input::KI_W;
case SDLK_x: return Rml::Input::KI_X;
case SDLK_y: return Rml::Input::KI_Y;
case SDLK_z: return Rml::Input::KI_Z;
case SDLK_SEMICOLON: return Rml::Input::KI_OEM_1;
case SDLK_PLUS: return Rml::Input::KI_OEM_PLUS;
case SDLK_COMMA: return Rml::Input::KI_OEM_COMMA;
case SDLK_MINUS: return Rml::Input::KI_OEM_MINUS;
case SDLK_PERIOD: return Rml::Input::KI_OEM_PERIOD;
case SDLK_SLASH: return Rml::Input::KI_OEM_2;
case SDLK_BACKQUOTE: return Rml::Input::KI_OEM_3;
case SDLK_LEFTBRACKET: return Rml::Input::KI_OEM_4;
case SDLK_BACKSLASH: return Rml::Input::KI_OEM_5;
case SDLK_RIGHTBRACKET: return Rml::Input::KI_OEM_6;
case SDLK_QUOTEDBL: return Rml::Input::KI_OEM_7;
case SDLK_KP_0: return Rml::Input::KI_NUMPAD0;
case SDLK_KP_1: return Rml::Input::KI_NUMPAD1;
case SDLK_KP_2: return Rml::Input::KI_NUMPAD2;
case SDLK_KP_3: return Rml::Input::KI_NUMPAD3;
case SDLK_KP_4: return Rml::Input::KI_NUMPAD4;
case SDLK_KP_5: return Rml::Input::KI_NUMPAD5;
case SDLK_KP_6: return Rml::Input::KI_NUMPAD6;
case SDLK_KP_7: return Rml::Input::KI_NUMPAD7;
case SDLK_KP_8: return Rml::Input::KI_NUMPAD8;
case SDLK_KP_9: return Rml::Input::KI_NUMPAD9;
case SDLK_KP_ENTER: return Rml::Input::KI_NUMPADENTER;
case SDLK_KP_MULTIPLY: return Rml::Input::KI_MULTIPLY;
case SDLK_KP_PLUS: return Rml::Input::KI_ADD;
case SDLK_KP_MINUS: return Rml::Input::KI_SUBTRACT;
case SDLK_KP_PERIOD: return Rml::Input::KI_DECIMAL;
case SDLK_KP_DIVIDE: return Rml::Input::KI_DIVIDE;
case SDLK_KP_EQUALS: return Rml::Input::KI_OEM_NEC_EQUAL;
case SDLK_BACKSPACE: return Rml::Input::KI_BACK;
case SDLK_TAB: return Rml::Input::KI_TAB;
case SDLK_CLEAR: return Rml::Input::KI_CLEAR;
case SDLK_RETURN: return Rml::Input::KI_RETURN;
case SDLK_PAUSE: return Rml::Input::KI_PAUSE;
case SDLK_CAPSLOCK: return Rml::Input::KI_CAPITAL;
case SDLK_PAGEUP: return Rml::Input::KI_PRIOR;
case SDLK_PAGEDOWN: return Rml::Input::KI_NEXT;
case SDLK_END: return Rml::Input::KI_END;
case SDLK_HOME: return Rml::Input::KI_HOME;
case SDLK_LEFT: return Rml::Input::KI_LEFT;
case SDLK_UP: return Rml::Input::KI_UP;
case SDLK_RIGHT: return Rml::Input::KI_RIGHT;
case SDLK_DOWN: return Rml::Input::KI_DOWN;
case SDLK_INSERT: return Rml::Input::KI_INSERT;
case SDLK_DELETE: return Rml::Input::KI_DELETE;
case SDLK_HELP: return Rml::Input::KI_HELP;
case SDLK_F1: return Rml::Input::KI_F1;
case SDLK_F2: return Rml::Input::KI_F2;
case SDLK_F3: return Rml::Input::KI_F3;
case SDLK_F4: return Rml::Input::KI_F4;
case SDLK_F5: return Rml::Input::KI_F5;
case SDLK_F6: return Rml::Input::KI_F6;
case SDLK_F7: return Rml::Input::KI_F7;
case SDLK_F8: return Rml::Input::KI_F8;
case SDLK_F9: return Rml::Input::KI_F9;
case SDLK_F10: return Rml::Input::KI_F10;
case SDLK_F11: return Rml::Input::KI_F11;
case SDLK_F12: return Rml::Input::KI_F12;
case SDLK_F13: return Rml::Input::KI_F13;
case SDLK_F14: return Rml::Input::KI_F14;
case SDLK_F15: return Rml::Input::KI_F15;
case SDLK_NUMLOCKCLEAR: return Rml::Input::KI_NUMLOCK;
case SDLK_SCROLLLOCK: return Rml::Input::KI_SCROLL;
case SDLK_LSHIFT: return Rml::Input::KI_LSHIFT;
case SDLK_RSHIFT: return Rml::Input::KI_RSHIFT;
case SDLK_LCTRL: return Rml::Input::KI_LCONTROL;
case SDLK_RCTRL: return Rml::Input::KI_RCONTROL;
case SDLK_LALT: return Rml::Input::KI_LMENU;
case SDLK_RALT: return Rml::Input::KI_RMENU;
case SDLK_LGUI: return Rml::Input::KI_LMETA;
case SDLK_RGUI: return Rml::Input::KI_RMETA;
/*
case SDLK_LSUPER: return Rml::Input::KI_LWIN;
case SDLK_RSUPER: return Rml::Input::KI_RWIN;
*/
default: break;
}
// clang-format on
return Rml::Input::KI_UNKNOWN;
}
int RmlSDL::ConvertMouseButton(int button)
{
switch (button)
{
case SDL_BUTTON_LEFT: return 0;
case SDL_BUTTON_RIGHT: return 1;
case SDL_BUTTON_MIDDLE: return 2;
default: return 3;
}
}
int RmlSDL::GetKeyModifierState()
{
SDL_Keymod sdl_mods = SDL_GetModState();
int retval = 0;
if (sdl_mods & KMOD_CTRL)
retval |= Rml::Input::KM_CTRL;
if (sdl_mods & KMOD_SHIFT)
retval |= Rml::Input::KM_SHIFT;
if (sdl_mods & KMOD_ALT)
retval |= Rml::Input::KM_ALT;
if (sdl_mods & KMOD_NUM)
retval |= Rml::Input::KM_NUMLOCK;
if (sdl_mods & KMOD_CAPS)
retval |= Rml::Input::KM_CAPSLOCK;
return retval;
}