//HTML Viewer in C--
//Copyright 2007-2013 by Veliant & Leency
//Asper, lev, Lrz, Barsuk, Nable...
//home icon - rachel fu, GPL licence

#ifndef AUTOBUILD
	#include "lang.h--"
#endif

//libraries
#define MEMSIZE 0x100000
#include "..\lib\kolibri.h"
#include "..\lib\strings.h"
#include "..\lib\figures.h"
#include "..\lib\encoding.h"
#include "..\lib\file_system.h"
#include "..\lib\mem.h"
#include "..\lib\dll.h"
#include "..\lib\draw_buf.h"
#include "..\lib\list_box.h"
#include "..\lib\cursor.h"

//*.obj libraries
#include "..\lib\lib.obj\box_lib.h"
#include "..\lib\lib.obj\libio_lib.h"
#include "..\lib\lib.obj\libimg_lib.h"
#include "..\lib\lib.obj\http.h"

char homepage[] = FROM "html\homepage.htm";

#ifdef LANG_RUS
	char version[]=" Текстовый браузер 1.0 Beta 2";
	?define IMAGES_CACHE_CLEARED "Кэш картинок очищен"
	?define T_LAST_SLIDE "Это последний слайд"
	char loading[] = "Загрузка страницы...<br>";
	char page_not_found[] = FROM "html\page_not_found_ru.htm";
	char accept_language[]= "Accept-Language: ru\n";
#else
	char version[]=" Text-based Browser 1.0 Beta 2";
	?define IMAGES_CACHE_CLEARED "Images cache cleared"
	?define T_LAST_SLIDE "This slide is the last"
	char loading[] = "Loading...<br>";
	char page_not_found[] = FROM "html\page_not_found_en.htm";
	char accept_language[]= "Accept-Language: en\n";	
#endif

proc_info Form;
#define WIN_W 640
#define WIN_H 480

char search_path[]="http://nigma.ru/index.php?s=";
char str_location[]="location\0";
int redirected = 0;

char stak[4096];
mouse m;
int action_buf;

dword http_transfer = 0;
dword http_buffer;

dword TAB_H = 19;
dword TAB_W = 150;
dword TOOLBAR_H = 50;
dword STATUSBAR_H =18;
dword col_bg = 0xE4DFE1;
dword panel_color = 0xF1F1F1;
dword border_color = 0x9F9F9F;

pb progress_bar = {0, 10, 83, 150, 12, 0, 0, 100, 0xeeeEEE, 8072B7EBh, 0x9F9F9F};

#include "..\TWB\TWB.c"
#include "menu_rmb.h"
#include "history.h"

char editURL[sizeof(URL)];
int	mouse_twb;
edit_box address_box = {250,55,34,0xffffff,0x94AECE,0xffffff,0xffffff,0,sizeof(URL),#editURL,#mouse_twb,2,19,19};

#define URL_SERVICE_HISTORY "WebView://history"
#define URL_SERVICE_HOME "WebView://home"

enum { BACK=300, FORWARD, REFRESH, HOME, NEWTAB, GOTOURL, SEARCHWEB, INPUT_CH, INPUT_BT, BTN_UP, BTN_DOWN };

struct skin {
	dword image, w, h;
} skin;

int LoadSkin()
{
	skin.image = load_image(abspath("wv_skin.png"));
	if (!skin.image) notify("WebView skin file 'wv_skin.png' not found, program will terminate");
	skin.w = DSWORD[skin.image+4];
	skin.h = DSWORD[skin.image+8];
}

void DrawProgress()
{
	unsigned long btn;
	//progressbar_draw stdcall(#progress_bar);
	progress_bar.width = progress_bar.left = 0;
	if (http_transfer == 0) return;
	if (progress_bar.max) btn = address_box.width*progress_bar.value/progress_bar.max; else btn = 30;
	DrawBar(address_box.left-1, address_box.top+14, btn, 2, progress_bar.progress_color);
}

void main()
{
	unsigned long key, btn;
	int half_scroll_size;
	int scroll_used=0, show_menu;
	
	mem_Init();
	CursorPointer.Load(#CursorFile);
	if (load_dll2(boxlib, #box_lib_init,0)!=0) notify("System Error: library doesn't exists /rd/1/lib/box_lib.obj");
	if (load_dll2(libio, #libio_init,1)!=0) notify("Error: library doesn't exists - libio");
	if (load_dll2(libimg, #libimg_init,1)!=0) notify("Error: library doesn't exists - libimg");
	if (load_dll2(libHTTP, #http_lib_init,1)!=0) notify("Error: library doesn't exists - http");
	LoadSkin();
	
	Form.width=WIN_W;
	Form.height=WIN_H;
	SetElementSizes();
	if (!URL) strcpy(#URL, URL_SERVICE_HOME);
	OpenPage();

	SetEventMask(0xa7);
	loop()
	{
		WaitEventTimeout(2);
		switch(EAX & 0xFF)
		{
			CASE evMouse:
				if (!CheckActiveProcess(Form.ID)) break;
				//Edit URL
				edit_box_mouse stdcall (#address_box);
				m.get();
				//Links hover
				if (m.y>WB1.list.y) PageLinks.Hover(m.x, m.y, link_color_inactive, link_color_active, bg_color);
				//Menu
				if (m.y>WB1.list.y) && (m.y<Form.height) && (bufsize)
				{
					if (m.pkm)
					{
						show_menu = 1;
					}
					if (!m.pkm) && (show_menu)
					{
						show_menu = 0;
						SwitchToAnotherThread();
						CreateThread(#menu_rmb,#stak+4092);
						break; 
					}
				}
				//Mouse scroll
				if (m.vert)
				{
					if (WB1.list.MouseScroll(m.vert)) WB1.Parse();
				}
				//Drag scroller
				scroll_wv.all_redraw = 0;
				if (!m.lkm) scroll_used=0;
				if (m.x>=scroll_wv.start_x) && (m.x<=scroll_wv.start_x+scroll_wv.size_x) 
				&& (m.y>=scroll_wv.start_y+scroll_wv.btn_height) && (-scroll_wv.btn_height+scroll_wv.start_y+scroll_wv.size_y>m.y)
				&& (WB1.list.count>WB1.list.visible) && (m.lkm)
				{
					scroll_used=1;
				}				
				if (scroll_used)
				{
					half_scroll_size = WB1.list.h - 16 * WB1.list.visible / WB1.list.count - 3 /2;
					if (half_scroll_size+WB1.list.y>m.y) || (m.y<0) || (m.y>4000) m.y=half_scroll_size+WB1.list.y;
					btn=WB1.list.first;
					WB1.list.first = m.y -half_scroll_size -WB1.list.y * WB1.list.count / WB1.list.h;
					if (WB1.list.visible+WB1.list.first>WB1.list.count) WB1.list.first=WB1.list.count-WB1.list.visible;
					if (btn<>WB1.list.first) WB1.Parse();
				}
				break;
			case evButton:
				btn=GetButtonID();
				if (btn==1)	ExitProcess();
				Scan(btn);
				break;
			case evKey:
				key = GetKey();
				
				if (address_box.flags & 0b10) SWITCH(key)
					{ CASE 52: CASE 53: CASE 54: goto _EDIT_MARK; } 

				Scan(key);
				
				_EDIT_MARK:
				if (key<>0x0d) && (key<>183) && (key<>184) {EAX=key<<8; edit_box_key stdcall(#address_box);}
				break;
			case evReDraw:
				if (action_buf) Scan(action_buf);
				Draw_Window();
				break;
				
			case evNetwork:
				if (http_transfer > 0) {
					http_process stdcall (http_transfer);
					$push EAX
					ESI = http_transfer;
					progress_bar.max = ESI.http_msg.content_length;
					if (progress_bar.value != ESI.http_msg.content_received)
					{
						progress_bar.value = ESI.http_msg.content_received;	
						DrawProgress();
					}
					$pop EAX
					if (EAX == 0) {
						ESI = http_transfer;
						// Handle redirects
						if (ESI.http_msg.status >= 300) && (ESI.http_msg.status < 400)
						{
							redirected++;
							if (redirected<=5)
							{
								http_find_header_field stdcall (http_transfer, #str_location);
								if (EAX!=0) {
									ESI = EAX;
									EDI = #URL;
									do {
										$lodsb;
										$stosb;
									} while (AL != 0) && (AL != 13) && (AL != 10));
									DSBYTE[EDI-1]='\0';
								}
							}
							else
							{
							//TODO: display error (too many redirects)
							}
						} 
						else
						{
							redirected = 0;
						}
						// Loading the page is complete, free resources
						if (redirected>0)
						{
							http_free stdcall (http_transfer);
							http_transfer=0;
							PageLinks.GetAbsoluteURL(#URL);
							strcpy(#editURL, #URL);
							OpenPage();
						}
						else
						{
							BrowserHistory.AddUrl();
							ESI = http_transfer;
							bufpointer = ESI.http_msg.content_ptr;
							bufsize = ESI.http_msg.content_received;
							http_free stdcall (http_transfer);
							http_transfer=0;
							SetPageDefaults();
							Draw_Window();		// stop button => refresh button
						}
					}
				}
		}
	}
}

void SetElementSizes()
{
	address_box.top = TOOLBAR_H-TAB_H/2-7+TAB_H;
	address_box.width = Form.cwidth - address_box.left - 25 - 22;
	WB1.list.SetSizes(0, TOOLBAR_H, Form.width - 10 - scroll_wv.size_x, Form.cheight - TOOLBAR_H - STATUSBAR_H, 0, 10);
	WB1.list.column_max = WB1.list.w - scroll_wv.size_x / 6;
	WB1.list.visible = WB1.list.h - 3 / WB1.list.line_h - 2;
	WB1.DrawBuf.Init(WB1.list.x, WB1.list.y, WB1.list.w, WB1.list.line_h);
}

void Draw_Window()
{
	int img_off;
	DefineAndDrawWindow(GetScreenWidth()-WIN_W/2,GetScreenHeight()-WIN_H/2,WIN_W,WIN_H,0x73,col_bg,0,0);
	GetProcessInfo(#Form, SelfInfo);
	if (Form.status_window>2) { DrawTitle(#header); return; }
	if (Form.height<120) MoveSize(OLD,OLD,OLD,120);
	if (Form.width<280) MoveSize(OLD,OLD,280,OLD);
	// tab {
	DrawBar(0, 0, TAB_W, TAB_H+1, panel_color);
	WriteText(5, 7, 0x80, 0xfdfdFd, "Index.htm");
	WriteText(4, 6, 0x80, 0, "Index.htm");
	// }
	DrawBar(TAB_W,0, Form.cwidth-TAB_W,TAB_H, col_bg);
	DrawBar(TAB_W-1,TAB_H, Form.cwidth-TAB_W+1,1, border_color);
	DrawBar(0,TAB_H+1, Form.cwidth,TOOLBAR_H-TAB_H-3, panel_color);
	DrawBar(0,TOOLBAR_H-2, Form.cwidth,1, 0xe9e9e9);
	DrawBar(0,TOOLBAR_H-1, Form.cwidth,1, border_color);
	img_draw stdcall(skin.image, TAB_W-13, 0, 30, skin.h, 101, 0);

	SetElementSizes();
	DrawRectangle(address_box.left-1, address_box.top-1, address_box.width+2, 16,address_box.color);
	DrawRectangle(address_box.left-2, address_box.top-2, address_box.width+4, 18,border_color);
	// < / >
	DefineButton(address_box.left-49, address_box.top-1, 23, skin.h-2, 300+BT_HIDE, 0);
	DefineButton(address_box.left-25, address_box.top-1, 23, skin.h-2, 301+BT_HIDE, 0);
	img_draw stdcall(skin.image, address_box.left-50, address_box.top-2, 48, skin.h, 3, 0);
	// refrash
	DefineButton(address_box.left+address_box.width+1, address_box.top-2, 16, skin.h-1, REFRESH+BT_HIDE+BT_NOFRAME, 0);
	if (http_transfer > 0) img_off = 131; else img_off = 52;
	img_draw stdcall(skin.image, address_box.left+address_box.width+1, address_box.top-2, 17, skin.h, img_off, 0);
	// config
	DefineButton(Form.cwidth-23, address_box.top-2, 17, skin.h-1, 312+BT_HIDE, 0);
	img_draw stdcall(skin.image, Form.cwidth-22, address_box.top-2, 16, skin.h, 85, 0);	

	ShowPage();
	DrawRectangle(scroll_wv.start_x, scroll_wv.start_y, scroll_wv.size_x, scroll_wv.size_y-1, scroll_wv.bckg_col);
	//status bar
	DrawBar(0,Form.cheight - STATUSBAR_H, Form.cwidth,STATUSBAR_H, col_bg);
	DrawBar(0,Form.cheight - STATUSBAR_H, Form.cwidth,1, border_color);
	progress_bar.top = Form.cheight - STATUSBAR_H + 4;
	DrawProgress();
}


void ChangeCharset(byte new_charset)
{
	BufEncode(new_charset);
	WB1.Parse();	
}

void Scan(int id)
{
	action_buf=0;
	if (id >= 400) 
	{
		ProcessLinks(id);
		return;
	}
	switch (id)
	{
		case 011: //Ctrk+K 
			ChangeCharset(_KOI);
			return;

		case 021: //Ctrl+U
			ChangeCharset(_UTF);
			return;

		case 004: //Ctrl+D
			ChangeCharset(_DOS);
			return;

		case 005: //Win encoding
			ChangeCharset(_WIN);
			return;

		case 009: //free img cache
			ImgCache.Free();
			notify(IMAGES_CACHE_CLEARED);
			WB1.Parse();
			return;

		case 003: //history
			strcpy(#URL, URL_SERVICE_HISTORY);
			OpenPage();
			return;

		case BACK:
			if (!BrowserHistory.GoBack()) return;
			OpenPage();
			return;
		case FORWARD:
			if (!BrowserHistory.GoForward()) return;
			OpenPage();
			return;
		case 052:  //F3
			if (strncmp(#URL,"http:",5)==0) 
			{
				WriteFile(bufsize, bufpointer, "/tmp0/1/webview.tmp");
				if (EAX==0) RunProgram("/rd/1/tinypad", "/tmp0/1/webview.tmp");
			}
			else
			{
				RunProgram("/rd/1/tinypad", #URL);
			}
			return;
		case 054: //F5
			IF(address_box.flags & 0b10) WB1.Parse();
			return;

		case REFRESH:
			if (http_transfer > 0) 
			{
				StopLoading();
				Draw_Window();
			}
			else OpenPage();
			return;
		case 014:
		case 020:
		case NEWTAB:
			MoveSize(190,80,OLD,OLD);
			RunProgram(#program_path, #URL);
			return;
			
		case HOME:
			strcpy(#editURL, "http://kolibrios.org/");
		case GOTOURL:
		case 0x0D: //enter
			if ((strstr(#editURL,"ttp://")==0) && (editURL[0]!='/')) strcpy(#URL,"http://"); else URL[0] = 0;
			strcat(#URL, #editURL);
			OpenPage();
			return;
		case SEARCHWEB:
			strcpy(#URL, #search_path);
			strcat(#URL, #editURL);
			OpenPage();
			return;

		case 183: //PgDown
			if (WB1.list.count < WB1.list.visible) return;
			IF(WB1.list.first == WB1.list.count - WB1.list.visible) return;
			WB1.list.first += WB1.list.visible + 2;
			IF(WB1.list.visible + WB1.list.first > WB1.list.count) WB1.list.first = WB1.list.count - WB1.list.visible;
			WB1.Parse();
			return;

		case 184: //PgUp
			if (WB1.list.count < WB1.list.visible) return;
			IF(WB1.list.first == 0) return;
			WB1.list.first -= WB1.list.visible - 2;
			IF(WB1.list.first < 0) WB1.list.first = 0;
			WB1.Parse();
			return;

		case 178:
		case BTN_UP:
			if (WB1.list.first <= 0) return;
			WB1.list.first--;
			WB1.Parse();
			return;

		case 177: 
		case BTN_DOWN:
			if (WB1.list.visible + WB1.list.first >= WB1.list.count) return;
			WB1.list.first++;
			WB1.Parse();
			return;

		case 180: //home
			if (WB1.list.KeyHome()) WB1.Parse();
			return; 

		case 181: //end
			if (WB1.list.count < WB1.list.visible) return;
			if (WB1.list.KeyEnd()) WB1.Parse();
			return;
		case 312:
			SwitchToAnotherThread();
			m.y = TOOLBAR_H-6;
			m.x = Form.cwidth - 167;
			CreateThread(#menu_rmb,#stak+4092);
	}
}



void ProcessLinks(int id)
{
	strcpy(#URL, PageLinks.GetURL(id-401));	
	//$1 - Condition Script
	if (URL[0] == '$')
	{
		if (URL[1]=='-') && (condition_href) condition_href--;
		if (URL[1]=='+') 
		{
			if (condition_href<condition_max) condition_href++; else notify(T_LAST_SLIDE);
		}
		if (URL[1]!='-') && (URL[1]!='+') condition_href = atoi(#URL+1);
		strcpy(#URL, BrowserHistory.CurrentUrl());
		ShowPage();
		return;
	}
	//#1
	if (URL[0] == '#')
	{
		strcpy(#anchor, #URL+strrchr(#URL, '#'));		
		strcpy(#URL, BrowserHistory.CurrentUrl());
		WB1.list.first=WB1.list.count-WB1.list.visible;
		ShowPage();
		return;
	}
	//liner.ru#1
	if (strrchr(#URL, '#')!=-1)
	{
		strcpy(#anchor, #URL+strrchr(#URL, '#'));
		URL[strrchr(#URL, '#')-1] = 0x00;
	}
	
	PageLinks.GetAbsoluteURL(#URL);
	
	if (!strcmp(#URL + strlen(#URL) - 4, ".gif")) || (!strcmp(#URL + strlen(#URL) - 4, ".png")) || (!strcmp(#URL + strlen(#URL) - 4, ".jpg"))
	{
		//if (strstr(#URL,"http:")) 
		RunProgram("/sys/media/kiv", #URL);
		strcpy(#editURL, BrowserHistory.CurrentUrl());
		strcpy(#URL, BrowserHistory.CurrentUrl());
		return;
	}
	if (!strcmpn(#URL,"mailto:", 7))
	{
		notify(#URL);
		strcpy(#editURL, BrowserHistory.CurrentUrl());
		strcpy(#URL, BrowserHistory.CurrentUrl());
		return;
	}
	OpenPage();
	return;
}

void StopLoading()
{
	if (http_transfer<>0)
	{
		EAX = http_transfer;
		EAX = EAX.http_msg.content_ptr;		// get pointer to data
		$push	EAX							// save it on the stack
		http_free stdcall (http_transfer);	// abort connection
		$pop	EAX							
		mem_Free(EAX);						// free data
		http_transfer=0;
		bufsize = 0;
		bufpointer = mem_Free(bufpointer);
	}
	progress_bar.value = 0;
	img_draw stdcall(skin.image, address_box.left+address_box.width+1, address_box.top-2, 17, skin.h, 52, 0);
}

void SetPageDefaults()
{
	strcpy(#header, #version);
	pre_text = 0;
	WB1.list.count = WB1.list.first = 0;
	stroka = 0;
	cur_encoding = _DEFAULT;
	if (o_bufpointer) o_bufpointer = free(o_bufpointer);
	anchor_line_num=WB1.list.first;
	anchor[0]='|';
}

void OpenPage()
{
	StopLoading();
	strcpy(#editURL, #URL);
	if (strncmp(#URL,"WebView:",8)==0) return;
	if (strncmp(#URL,"http:",5)==0)
	{
		img_draw stdcall(skin.image, address_box.left+address_box.width+1, address_box.top-2, 17, skin.h, 131, 0);
		http_get stdcall (#URL, #accept_language);
		http_transfer = EAX;
		if (http_transfer == 0)
		{
			StopLoading();
			bufsize = 0;
			bufpointer = mem_Free(bufpointer);
			ShowPage();
			return;
		}
	}
	else
	{
		BrowserHistory.AddUrl();
		file_size stdcall (#URL);
		bufsize = EBX;
		if (bufsize)
		{
			bufpointer = mem_Free(bufpointer);
			bufpointer = mem_Alloc(bufsize);
			SetPageDefaults();
			ReadFile(0, bufsize, bufpointer, #URL);				
		}
		ShowPage();
	}
}

void ShowPage()
{
	address_box.size = address_box.pos = strlen(#editURL);
	address_box.offset=0;
	edit_box_draw stdcall(#address_box);

	if (strcmp(#URL, URL_SERVICE_HOME)==0) WB1.Prepare(#homepage, sizeof(homepage)); else
	if (strcmp(#URL, URL_SERVICE_HISTORY)==0) ShowHistory(); else
	if (!bufsize)
	{
		PageLinks.Clear();
		if (http_transfer<>0)
		{
			WB1.Prepare(#loading, sizeof(loading));
		}
		else
			WB1.Prepare(#page_not_found, sizeof(page_not_found));
	}
	else
		WB1.Parse();

	if (!header) strcpy(#header, #version);
	if (!strcmp(#version, #header)) DrawTitle(#header);
}




stop: