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#include "..\TWB\colors.h"

#include "..\TWB\anchors.h"

#include "..\TWB\parse_tag.h"

#include "..\TWB\special.h"

#include "..\TWB\img_cache.h"

#include "..\TWB\tag_list.h"

dword page_bg;

dword link_color_default;

dword link_color_active;

#include "..\TWB\links.h"

#define BODY_MARGIN 6

#define BASIC_LINE_H 18

DrawBufer DrawBuf;

char line[500];

struct _style {

	bool

	b, u, s, h,

	pre,

	blq,

	button,

	image;

	dword bg_color;

	LIST tag_list;

	dword tag_title;

};

struct TWebBrowser {

	llist list;

	_style style;

	dword draw_y, stolbec;

	int zoom;

	dword o_bufpointer;

	int cur_encoding, custom_encoding;

	bool link, t_html, t_body;

	dword bufpointer;

	dword bufsize;

	dword is_html;

	void Paint();

	void SetPageDefaults();

	void AddCharToTheLine();

	void ParseHtml();

	void SetStyle();

	bool CheckForLineBreak();

	void NewLine();

	void DrawScroller();

	void ChangeEncoding();

	void DrawPage();

	char header[150];

};

scroll_bar scroll_wv = { 15,NULL,NULL,NULL,0,2,NULL,0,0,0xeeeeee,0xBBBbbb,0xeeeeee};

//============================================================================================

void TWebBrowser::Paint()

{

	dword start_x, line_length, stolbec_len;

	dword text_color__;

	if (style.tag_title)

	{

		strncpy(#header, #line, sizeof(TWebBrowser.header)-1);

		strncat(#header, " - ", sizeof(TWebBrowser.header)-1);

		strncat(#header, #version, sizeof(TWebBrowser.header)-1);

		line = 0;

		return;

	}

	if (t_html) && (!t_body) {

		line = 0;

		return;

	}

	if (line)

	{

		start_x = stolbec * list.font_w + BODY_MARGIN + list.x;

		stolbec_len = strlen(#line) * zoom;

		line_length = stolbec_len * list.font_w;

		if (debug_mode) {

			DrawBuf.DrawBar(start_x, draw_y, line_length, list.item_h, 0xDDDddd);

		}

		if (style.bg_color!=page_bg) {

			DrawBuf.DrawBar(start_x, draw_y, line_length, list.item_h, style.bg_color);

		}

		if (style.image) {

			DrawBuf.DrawBar(start_x, draw_y, line_length, list.item_h-1, 0xF9DBCB);

		}

		if (style.button) {

			DrawBuf.DrawBar(start_x, draw_y, line_length, list.item_h - calc(zoom*2), 0xCCCccc);

			DrawBuf.DrawBar(start_x, draw_y + list.item_h - calc(zoom*2), line_length, zoom, 0x999999);

		}

		text_color__ = text_colors[text_color_index];

		if (link) && (text_colors[text_color_index]==text_colors[0]) text_color__ = link_color_default;

		DrawBuf.WriteText(start_x, draw_y, list.font_type, text_color__, #line, NULL);

		if (style.b) DrawBuf.WriteText(start_x+1, draw_y, list.font_type, text_color__, #line, NULL);

		if (style.s) DrawBuf.DrawBar(start_x, list.item_h / 2 - zoom + draw_y, line_length, zoom, text_color__);

		if (style.u) DrawBuf.DrawBar(start_x, list.item_h - zoom - zoom + draw_y, line_length, zoom, text_color__);

		if (link) {

			if (line[0]==' ') && (line[1]==NULL) {} else {

				DrawBuf.DrawBar(start_x, draw_y + list.item_h - calc(zoom*2)-1, line_length, zoom, link_color_default);

				links.add_text(start_x, draw_y + list.y, line_length, list.item_h - calc(zoom*2)-1, zoom);

			}

		}

		stolbec += stolbec_len;

		if (debug_mode) debug(#line);

		line = NULL;

	}

}

//============================================================================================

void TWebBrowser::SetPageDefaults()

{

	style.b = style.u = style.s = style.h = style.blq = t_html = t_body = style.pre =

	link = text_color_index = text_colors[0] = style.tag_title = false;

	style.tag_list.reset();

	link_color_default = 0x0000FF;

	link_color_active = 0xFF0000;

	page_bg = 0xFFFFFF;

	style.bg_color = page_bg;

	DrawBuf.Fill(0, page_bg);

	links.clear();

	anchors.clear();

	header = NULL;

	cur_encoding = CH_CP866;

	draw_y = BODY_MARGIN;

	stolbec = 0;

	line = 0;

	zoom = 1;

	//hold original buffer

	if (o_bufpointer) o_bufpointer=free(o_bufpointer);

	o_bufpointer = malloc(bufsize);

	memmov(o_bufpointer, bufpointer, bufsize);

	if (custom_encoding != -1) {

		cur_encoding = custom_encoding;

		bufpointer = ChangeCharset(cur_encoding, "CP866", bufpointer);

	}

}

//============================================================================================

void TWebBrowser::AddCharToTheLine(unsigned char _char)

{

	dword line_len;

	if (_char<=15) _char=' ';

	line_len = strlen(#line);

	if (!style.pre) && (_char == ' ')

	{

		if (line[line_len-1]==' ') return; //no double spaces

		if (!stolbec) && (!line) return; //no paces at the beginning of the line

	}

	if (line_len < sizeof(line)) chrcat(#line, _char);

	CheckForLineBreak();

}

//============================================================================================

void TWebBrowser::ParseHtml(dword _bufpointer, _bufsize){

	word bukva[2];

	char unicode_symbol[10];

	dword unicode_symbol_result;

	dword j;

	bool ignor_param=false;

	int tab_len;

	dword bufpos;

	bufsize = _bufsize;

	if (bufpointer != _bufpointer) {

		bufpointer = malloc(bufsize);

		memmov(bufpointer, _bufpointer, bufsize);

	} else {

		custom_encoding = CH_CP866;

	}

	SetPageDefaults();

	is_html = true;

	if (!strstri(bufpointer, "

		t_body = true;

		if (!strstri(bufpointer, "

			style.pre = true; //show linebreaks for a plaint text

			is_html = false;

		}

	}

	for (bufpos=bufpointer ; (bufpos < bufpointer+bufsize) && (ESBYTE[bufpos]!=0) ; bufpos++;)

	{

		bukva = ESBYTE[bufpos];

		switch (bukva)

		{

		case 0x0a:

			if (style.pre) {

				Paint();

				NewLine();

			} else {

				AddCharToTheLine(0x0a);

			}

			break;

		case 0x09:

			if (style.pre) {

				tab_len = strlen(#line) + stolbec % 4;

				if (!tab_len) tab_len = 4; else tab_len = 4 - tab_len;

				for (j=0; j

			} else {

				AddCharToTheLine(0x09);

			}

			break;

		case '&': //  and so on

			for (j=1, unicode_symbol=0; (ESBYTE[bufpos+j]<>';') && (j<8); j++)

			{

				bukva = ESBYTE[bufpos+j];

				chrcat(#unicode_symbol, bukva);

			}

			if (GetUnicodeSymbol(#line, #unicode_symbol, sizeof(line)-1)) {

				bufpos += j;

				CheckForLineBreak();

			} else {

				AddCharToTheLine('&');

			}

			break;

		case '<':

			if (!is_html) goto _default;

			bufpos++;

			if (!strncmp(bufpos,"!--",3))

			{

				bufpos+=3;

				while (strncmp(bufpos,"-->",3)!=0) && (bufpos < bufpointer + bufsize)

				{

					bufpos++;

				}

				bufpos+=2;

				break;

			}

			tag.reset();

			if (ESBYTE[bufpos] == '/') {

				tag.opened = false;

				bufpos++;

			}

			ignor_param=false;

			while (ESBYTE[bufpos] !='>') && (bufpos < bufpointer + bufsize) //ïîëó÷àåì òåã è åãî ïàðàìåòðû

			{

				bukva = ESBYTE[bufpos];

				if (bukva == '\x9') || (bukva == '\x0a') || (bukva == '\x0d') bukva = ' ';

				if (!ignor_param) && (bukva <>' ')

				{

					if (strlen(#tag.name)+1

				}

				else

				{

					ignor_param = true;

					if (strlen(#tag.params)+1

					//chrncat(#tag.params, bukva, sizeof(tag.params)-1);

				}

				bufpos++;

			}

			strlwr(#tag.name);

			// ignore text inside the next tags

			if (tag.is("script")) || (tag.is("style")) || (tag.is("binary")) || (tag.is("select"))  {

				sprintf(#tag.params, "", #tag.name);

				if (j = strstri(bufpos, #tag.params)) bufpos = j-1;

				break;

			}

			if (tag.name[strlen(#tag.name)-1]=='/') tag.name[strlen(#tag.name)-1]=NULL; //for br/ !!!!!!!!

			if (tag.params) tag.parse_params();

			if (tag.name) {

				CheckForLineBreak();

				Paint();

				if (tag.name) SetStyle();

			}

			break;

		default:

			_default:

			AddCharToTheLine(ESBYTE[bufpos]);

		}

	}

	Paint();

	NewLine();

	list.count = draw_y;

	list.CheckDoesValuesOkey();

	anchors.current = NULL;

	custom_encoding = -1;

	if (!header) {

		strncpy(#header, #version, sizeof(TWebBrowser.header)-1);

		DrawTitle(#header);

	}

}

//============================================================================================

bool TWebBrowser::CheckForLineBreak()

{

	int line_break_pos;

	char new_line_text[4096];

	//Do we need a line break?

	if (strlen(#line)*zoom + stolbec < list.column_max) return false;

	//Yes, we do. Lets calculate where...

	line_break_pos = strrchr(#line, ' ');

	//Is a new line fits in the current line?

	if (line_break_pos*zoom + stolbec > list.column_max) {

		line_break_pos = list.column_max/zoom - stolbec;

		while(line_break_pos) && (line[line_break_pos]!=' ') line_break_pos--;

	}

	//Maybe a new line is too big for the whole new line? Then we have to split it

	if (!line_break_pos) && (style.tag_list.level*5 + strlen(#line) * zoom >= list.column_max) {

		line_break_pos = list.column_max/zoom - stolbec;

	}

	strcpy(#new_line_text, #line + line_break_pos);

	line[line_break_pos] = 0x00;

	Paint();

	strcpy(#line, #new_line_text);

	NewLine();

	//while (CheckForLineBreak()==true) {};

	return true;

}

//============================================================================================

void TWebBrowser::SetStyle() {

	char img_path[4096]=0;

	dword value;

	if (value = tag.get_value_of("name=")) || (value = tag.get_value_of("id=")) {

		anchors.add(value, draw_y);

		if (anchors.current) && (streq(value, #anchors.current+1)) {

			list.first = draw_y;

			anchors.current = NULL;

		}

	}

	if (tag.is("html")) {

		t_html = tag.opened;

		return;

	}

	if (tag.is("title")) {

		style.tag_title = tag.opened;

		if (!tag.opened) DrawTitle(#header);

		return;

	}

	if (tag.is("body")) {

		t_body = tag.opened;

		if (value = tag.get_value_of("link="))   link_color_default = GetColor(value);

		if (value = tag.get_value_of("alink="))  link_color_active = GetColor(value);

		if (value = tag.get_value_of("text="))   text_colors[0]=GetColor(value);

		if (value = tag.get_value_of("bgcolor=")) {

			style.bg_color = page_bg = GetColor(value);

			DrawBuf.Fill(0, page_bg);

		}

		// Autodetecting encoding if no encoding was set

		if (tag.opened) && (custom_encoding==-1) && (cur_encoding == CH_CP866) {

			if (strstr(bufpointer, "\208\190")) ChangeEncoding(CH_UTF8);

			else if (chrnum(bufpointer, '\246')>5) ChangeEncoding(CH_CP1251);

		}

		return;

	}

	if (tag.is("br")) { NewLine(); return; }

	if (tag.is("b")) || (tag.is("strong")) || (tag.is("big")) || (tag.is("w:b")) {

		style.b = tag.opened;

		return;

	}

	if (tag.is("w:r")) && (!tag.opened) { style.b = false; return; }

	if (tag.is("a")) {

		if (tag.opened)

		{

			if (value = tag.get_value_of("href=")) && (!strstr(value,"javascript:"))

			{

				link = true;

				links.add_link(value);

			}

		} else {

			link = false;

			style.bg_color = page_bg;

		}

		return;

	}

	if (tag.is("iframe")) && (value = tag.get_value_of("src=")) {

		NewLine();

		strcpy(#line, "IFRAME: ");

		Paint();

		link=true;

		links.add_link(value);

		strncpy(#line, value, sizeof(line)-1);

		while (CheckForLineBreak()) {};

		Paint();

		link=false;

		NewLine();

	}

	if (tag.is("font")) {

		style.bg_color = page_bg;

		if (tag.opened)

		{

			text_color_index++;

			text_colors[text_color_index] = text_colors[text_color_index-1];

			if (value = tag.get_value_of("color=")) text_colors[text_color_index] = GetColor(value);

			if (value = tag.get_value_of("bg=")) style.bg_color = GetColor(value);

		}

		else if (text_color_index > 0) text_color_index--;

		return;

	}

	if (tag.is("div")) {

		if (streq(#tag.prior,"div")) && (tag.opened) return;

		NewLine();

		return;

	}

	if (tag.is("header")) || (tag.is("article")) || (tag.is("footer")) || (tag.is("figure")) {

		NewLine();

		return;

	}

	if (tag.is("p")) || (tag.is("w:p"))  {

		IF (tag.prior[0] == 'h') || (streq(#tag.prior,"td")) || (streq(#tag.prior,"p")) return;

		NewLine();

		return;

	}

	if (tag.is("pre")) { style.pre = tag.opened; return; }

	if (tag.is("td")) { if (tag.opened) AddCharToTheLine(' '); return; }

	if (tag.is("tr")) { if (tag.opened) NewLine(); return; }

	if (tag.is("button")) { style.button = tag.opened; stolbec++; return; }

	if (tag.is("u")) || (tag.is("ins")) { style.u=tag.opened; return;}

	if (tag.is("s")) || (tag.is("strike")) || (tag.is("del")) { style.s=tag.opened; return; }

	if (tag.is("dl")) {

		if (tag.opened) NewLine();

		return;

	}

	if (tag.is("dd")) {

		//NewLine();

		//if (tag.opened) stolbec += 5;  //stolbec overflow!

		return;

	}

	if (tag.is("blockquote")) { style.blq = tag.opened; return; }

	if (tag.is("code")) {

		if (tag.opened) style.bg_color = 0xe4ffcb; else style.bg_color = page_bg;

		style.pre = tag.opened; return;

	}

	if (tag.is("img")) {

		if (value = tag.get_value_of("src=")) strlcpy(#img_path, value, sizeof(img_path)-1);

		if (value = tag.get_value_of("title=")) && (strlen(value)

		if (value = tag.get_value_of("alt=")) && (strlen(value)

		if (!img_path) { line=0; return; }

		style.image = true;

		text_color_index++;

		text_colors[text_color_index] = 0x9A6F29;

		if (!line) {

			if (!strncmp(#img_path, "data:", 5)) img_path=0;

			replace_char(#img_path, '?', NULL, strlen(#img_path));

			sprintf(#line, "[%s]", #img_path+strrchr(#img_path, '/'));

			line[50]= NULL;

		}

		while (CheckForLineBreak()) {};

		Paint();

		text_color_index--;

		style.image = false;

		//ImgCache.Images( list.x, draw_y, list.w);

		return;

	}

	if (tag.is("h4")) {

		NewLine();

		NewLine();

		style.h = tag.opened;

		style.b = tag.opened;

	}

	if (tag.is("h1")) || (tag.is("h2")) || (tag.is("h3")) || (tag.is("caption")) {

		style.h = tag.opened;

		if (tag.opened) {

			if (!style.pre) NewLine();

			draw_y += 10;

			zoom=2;

			list.font_type |= 10011001b;

			list.item_h = BASIC_LINE_H * 2 - 2;

			if (tag.is("h1")) style.b = true;

		} else {

			if (tag.is("h1")) style.b = false;

			NewLine();

			zoom=1;

			list.font_type = 10011000b;

			list.item_h = BASIC_LINE_H;

		}

		return;

	}

	if (tag.is("dt")) {

		style.tag_list.upd_level(tag.opened, DT);

		if (tag.opened) NewLine();

		return;

	}

	if (tag.is("ul")) {

		style.tag_list.upd_level(tag.opened, UL);

		if (!tag.opened) && (!style.pre) NewLine();

		return;

	}

	if (tag.is("ol")) {

		style.tag_list.upd_level(tag.opened, OL);

		if (!tag.opened) && (!style.pre) NewLine();

		return;

	}

	if (tag.is("li")) && (tag.opened)

	{

		if (!style.tag_list.level) style.tag_list.upd_level(1, UL);

		if (!style.pre) NewLine();

		if (style.tag_list.get_order_type() == UL) {

			strcpy(#line, "\31 ");

			stolbec = style.tag_list.level * 5 - 2;

		}

		if (style.tag_list.get_order_type() == OL) {

			sprintf(#line, "%i. ", style.tag_list.inc_counter());

			stolbec = style.tag_list.level * 5 - strlen(#line);

		}

		return;

	}

	if (tag.is("q"))

	{

		if (tag.opened)	{

			EAX = strlen(#line);

			if (line[EAX-1] != ' ') chrcat(#line, ' ');

			chrcat(#line, '\"');

		}

		if (!tag.opened) strcat(#line, "\" ");

		return;

	}

	if (tag.is("hr")) {

		if (value = tag.get_value_of("color=")) EDI = GetColor(value); else EDI = 0x999999;

		$push edi;

		NewLine();

		$pop edi;

		draw_y += 10;

		DrawBuf.DrawBar(5, draw_y - 1, list.w-10, 1, EDI);

		NewLine();

		draw_y += 10;

		return;

	}

	if (custom_encoding == -1) && (tag.is("meta")) || (tag.is("?xml")) {

		if (value = tag.get_value_of("charset=")) || (value = tag.get_value_of("content=")) || (value = tag.get_value_of("encoding="))

		{

			value += strrchr(value, '='); //search in content=

			strlwr(value);

			if      (streq(value,"utf-8"))        || (streq(value,"utf8"))        ChangeEncoding(CH_UTF8);

			else if (streq(value,"windows-1251")) || (streq(value,"windows1251")) ChangeEncoding(CH_CP1251);

			else if (streq(value,"dos"))          || (streq(value,"cp-866"))      ChangeEncoding(CH_CP866);

			else if (streq(value,"iso-8859-5"))   || (streq(value,"iso8859-5"))   ChangeEncoding(CH_ISO8859_5);

			else if (streq(value,"koi8-r"))       || (streq(value,"koi8-u"))      ChangeEncoding(CH_KOI8);

		}

		return;

	}

}

//============================================================================================

void TWebBrowser::DrawScroller()

{

	scroll_wv.max_area = list.count;

	scroll_wv.cur_area = list.visible;

	scroll_wv.position = list.first;

	scroll_wv.all_redraw = 0;

	scroll_wv.start_x = list.x + list.w;

	scroll_wv.start_y = list.y;

	scroll_wv.size_y = list.h;

	scrollbar_v_draw(#scroll_wv);

}

//============================================================================================

void TWebBrowser::ChangeEncoding(int _new_encoding)

{

	if (cur_encoding == _new_encoding) return;

	cur_encoding = _new_encoding;

	bufpointer = ChangeCharset(cur_encoding, "CP866", bufpointer);

	if (header) {

		ChangeCharset(cur_encoding, "CP866", #header);

		DrawTitle(#header);

	}

}

//============================================================================================

void TWebBrowser::NewLine()

{

	dword onleft, ontop;

	static int empty_line=0;

	if (!stolbec) && (draw_y==BODY_MARGIN) return;

	if (style.tag_list.level) && (stolbec == style.tag_list.level * 5) {

		if (empty_line<1) empty_line++;

		else return;

	} else if (!stolbec) {

		if (empty_line<1) empty_line++;

		else return;

	} else {

		empty_line=0;

	}

	onleft = list.x + BODY_MARGIN;

	ontop = draw_y + list.y;

	if (t_html) && (!t_body) return;

	draw_y += list.item_h;

	if (style.blq) stolbec = 6; else stolbec = 0;

	stolbec += style.tag_list.level * 5;

	if (debug_mode) debugln(NULL);

}

//============================================================================================

void TWebBrowser::DrawPage()

{

	PutPaletteImage(list.first * DrawBuf.bufw * 4 + buf_data+8, DrawBuf.bufw, list.h, DrawBuf.bufx, DrawBuf.bufy, 32, 0);

	DrawScroller();

}