/*
* InputSourceText.cpp, part of VCMI engine
*
* Authors: listed in file AUTHORS in main folder
*
* License: GNU General Public License v2.0 or later
* Full text of license available in license.txt file, in main folder
*
*/

#include "StdInc.h"
#include "InputSourceText.h"

#include "../CMT.h"
#include "../gui/CGuiHandler.h"
#include "../gui/EventDispatcher.h"

#include "../../lib/Rect.h"

#include <SDL_events.h>
#include <SDL_render.h>

#ifdef VCMI_APPLE
#	include <dispatch/dispatch.h>
#endif

#ifdef VCMI_IOS
#	include "ios/utils.h"
#endif

void InputSourceText::handleEventTextInput(const SDL_TextInputEvent & text)
{
	GH.events().dispatchTextInput(text.text);
}

void InputSourceText::handleEventTextEditing(const SDL_TextEditingEvent & text)
{
	GH.events().dispatchTextEditing(text.text);
}

void InputSourceText::startTextInput(const Rect & whereInput)
{
#ifdef VCMI_APPLE
	dispatch_async(dispatch_get_main_queue(), ^{
#endif

	// TODO ios: looks like SDL bug actually, try fixing there
	auto renderer = SDL_GetRenderer(mainWindow);
	float scaleX, scaleY;
	SDL_Rect viewport;
	SDL_RenderGetScale(renderer, &scaleX, &scaleY);
	SDL_RenderGetViewport(renderer, &viewport);

#ifdef VCMI_IOS
	const auto nativeScale = iOS_utils::screenScale();
	scaleX /= nativeScale;
	scaleY /= nativeScale;
#endif

	SDL_Rect rectInScreenCoordinates;
	rectInScreenCoordinates.x = (viewport.x + whereInput.x) * scaleX;
	rectInScreenCoordinates.y = (viewport.y + whereInput.y) * scaleY;
	rectInScreenCoordinates.w = whereInput.w * scaleX;
	rectInScreenCoordinates.h = whereInput.h * scaleY;

	SDL_SetTextInputRect(&rectInScreenCoordinates);

	if (SDL_IsTextInputActive() == SDL_FALSE)
	{
		SDL_StartTextInput();
	}

#ifdef VCMI_APPLE
	});
#endif
}

void InputSourceText::stopTextInput()
{
#ifdef VCMI_APPLE
	dispatch_async(dispatch_get_main_queue(), ^{
#endif

	if (SDL_IsTextInputActive() == SDL_TRUE)
	{
		SDL_StopTextInput();
	}

#ifdef VCMI_APPLE
	});
#endif
}