litehtml-sys 0.2.4

#include "windows_container.h"
#define _USE_MATH_DEFINES
#include <math.h>
#include "cairo_font.h"
#include <strsafe.h>

windows_container::windows_container(void)
{
	m_temp_surface	= cairo_image_surface_create(CAIRO_FORMAT_ARGB32, 2, 2);
	m_temp_cr		= cairo_create(m_temp_surface);
	m_font_link		= NULL;
	CoCreateInstance(CLSID_CMultiLanguage, NULL, CLSCTX_ALL, IID_IMLangFontLink2, (void**) &m_font_link);
}

windows_container::~windows_container(void)
{
	clear_images();
	if(m_font_link)
	{
		m_font_link->Release();
	}
	cairo_surface_destroy(m_temp_surface);
	cairo_destroy(m_temp_cr);
}

litehtml::uint_ptr windows_container::create_font(const litehtml::font_description& descr, const litehtml::document* doc, litehtml::font_metrics* fm)
{
	std::wstring fnt_name = L"sans-serif";

	litehtml::string_vector fonts;
	litehtml::split_string(descr.family, fonts, ",");
	if(!fonts.empty())
	{
		litehtml::trim(fonts[0]);
		fnt_name = cairo_font::utf8_to_wchar(fonts[0]);
		if (fnt_name.front() == L'"' || fnt_name.front() == L'\'')
		{
			fnt_name.erase(0, 1);
		}
		if (fnt_name.back() == L'"' || fnt_name.back() == L'\'')
		{
			fnt_name.erase(fnt_name.length() - 1, 1);
		}
	}

	cairo_font* fnt = new cairo_font(	m_font_link,
										fnt_name.c_str(), 
										descr.size, 
										descr.weight, 
										(descr.style == litehtml::font_style_italic) ? TRUE : FALSE,
										(descr.decoration_line & litehtml::text_decoration_line_line_through) ? TRUE : FALSE,
										(descr.decoration_line & litehtml::text_decoration_line_underline) ? TRUE : FALSE);

	cairo_save(m_temp_cr);
	fnt->load_metrics(m_temp_cr);

	if(fm)
	{
		fm->font_size	= descr.size;
		fm->ascent		= fnt->metrics().ascent;
		fm->descent		= fnt->metrics().descent;
		fm->height		= fnt->metrics().height;
		fm->x_height	= fnt->metrics().x_height;
		fm->ch_width	= fnt->metrics().ch_width;
		if(descr.style == litehtml::font_style_italic || descr.decoration_line != litehtml::text_decoration_line_none)
		{
			fm->draw_spaces = true;
		} else
		{
			fm->draw_spaces = false;
		}
		fm->sub_shift = descr.size / 5;
		fm->super_shift = descr.size / 3;
	}

	cairo_restore(m_temp_cr);

	return (litehtml::uint_ptr) fnt;
}

void windows_container::delete_font( litehtml::uint_ptr hFont )
{
	cairo_font* fnt = (cairo_font*) hFont;
	if(fnt)
	{
		delete fnt;
	}
}

litehtml::pixel_t windows_container::text_width(const char* text, litehtml::uint_ptr hFont)
{
	cairo_font* fnt = (cairo_font*) hFont;
	
	cairo_save(m_temp_cr);
	double ret = fnt->text_width(m_temp_cr, text);
	cairo_restore(m_temp_cr);
	return (litehtml::pixel_t) ret;
}

void windows_container::draw_text( litehtml::uint_ptr hdc, const char* text, litehtml::uint_ptr hFont, litehtml::web_color color, const litehtml::position& pos )
{
	if(hFont)
	{
		cairo_font* fnt = (cairo_font*) hFont;
		cairo_t* cr		= (cairo_t*) hdc;
		cairo_save(cr);

		apply_clip(cr);

		int x = pos.left();
		int y = pos.bottom() - fnt->metrics().descent;

		set_color(cr, color);
		fnt->show_text(cr, x, y, text);

		cairo_restore(cr);
	}
}

litehtml::string windows_container::resolve_color(const litehtml::string& color) const
{
	struct custom_color 
	{
		const char*	name;
		int color_index;
	};

	static custom_color colors[] = {
		{ "ActiveBorder",          COLOR_ACTIVEBORDER},
		{ "ActiveCaption",         COLOR_ACTIVECAPTION},
		{ "AppWorkspace",          COLOR_APPWORKSPACE },
		{ "Background",            COLOR_BACKGROUND },
		{ "ButtonFace",            COLOR_BTNFACE },
		{ "ButtonHighlight",       COLOR_BTNHIGHLIGHT },
		{ "ButtonShadow",          COLOR_BTNSHADOW },
		{ "ButtonText",            COLOR_BTNTEXT },
		{ "CaptionText",           COLOR_CAPTIONTEXT },
        { "GrayText",              COLOR_GRAYTEXT },
		{ "Highlight",             COLOR_HIGHLIGHT },
		{ "HighlightText",         COLOR_HIGHLIGHTTEXT },
		{ "InactiveBorder",        COLOR_INACTIVEBORDER },
		{ "InactiveCaption",       COLOR_INACTIVECAPTION },
		{ "InactiveCaptionText",   COLOR_INACTIVECAPTIONTEXT },
		{ "InfoBackground",        COLOR_INFOBK },
		{ "InfoText",              COLOR_INFOTEXT },
		{ "Menu",                  COLOR_MENU },
		{ "MenuText",              COLOR_MENUTEXT },
		{ "Scrollbar",             COLOR_SCROLLBAR },
		{ "ThreeDDarkShadow",      COLOR_3DDKSHADOW },
		{ "ThreeDFace",            COLOR_3DFACE },
		{ "ThreeDHighlight",       COLOR_3DHILIGHT },
		{ "ThreeDLightShadow",     COLOR_3DLIGHT },
		{ "ThreeDShadow",          COLOR_3DSHADOW },
		{ "Window",                COLOR_WINDOW },
		{ "WindowFrame",           COLOR_WINDOWFRAME },
		{ "WindowText",            COLOR_WINDOWTEXT }
	};

    for (auto& clr : colors)
    {
		if (!litehtml::t_strcasecmp(clr.name, color.c_str()))
        {
            char  str_clr[20];
            DWORD rgb_color =  GetSysColor(clr.color_index);
            StringCchPrintfA(str_clr, 20, "#%02X%02X%02X", GetRValue(rgb_color), GetGValue(rgb_color), GetBValue(rgb_color));
            return std::move(litehtml::string(str_clr));
        }
    }
    return std::move(litehtml::string());
}

cairo_surface_t* windows_container::get_image(const std::string& url)
{
	return nullptr;
}

double windows_container::get_screen_dpi() const
{
	HDC hdc = GetDC(NULL);
	int ret = GetDeviceCaps(hdc, LOGPIXELSX);
	ReleaseDC(NULL, hdc);
	return ret;
}

int windows_container::get_screen_width() const
{
	HDC hdc = GetDC(NULL);
	int ret = GetDeviceCaps(hdc, HORZRES);
	ReleaseDC(NULL, hdc);
	return ret;
}
int windows_container::get_screen_height() const
{
	HDC hdc = GetDC(NULL);
	int ret = GetDeviceCaps(hdc, VERTRES);
	ReleaseDC(NULL, hdc);
	return ret;
}