kolibrios/programs/cmm/TWB/TWB.c
Kirill Lipatov (Leency) d05eee0368 WebView 2.0 beta 1:
- rewrite tag parsing procedure to use collections
- completely refactor TWB component
- fix a couple of issues: broken tabs in <pre>, mishandle of local page not found, anchors memory leak
- so finally all id's and names are included as anchors*
(*some anchors in web still don't work)

git-svn-id: svn://kolibrios.org@7752 a494cfbc-eb01-0410-851d-a64ba20cac60
2020-03-26 00:12:32 +00:00

554 lines
16 KiB
C

#include "..\TWB\colors.h"
#include "..\TWB\anchors.h"
#include "..\TWB\parce_tag.h"
#include "..\TWB\absolute_url.h"
char line[500];
#include "..\TWB\unicode_tags.h"
enum { ALIGN_LEFT, ALIGN_CENTER, ALIGN_RIGHT};
struct _style {
bool
b, u, s, h,
pre,
blq,
li,
li_tab,
button,
image,
align;
dword bg_color;
};
struct TWebBrowser {
llist list;
_style style;
DrawBufer DrawBuf;
dword draw_y, stolbec;
int zoom;
dword o_bufpointer;
void SetPageDefaults();
void AddCharToTheLine();
void ParseHtml();
void SetStyle();
void DrawStyle();
void DrawPage();
void DrawScroller();
void NewLine();
bool CheckForLineBreak();
void BufEncode();
} WB1;
dword link_color_inactive;
dword link_color_active;
dword page_bg;
bool
link,
cur_encoding,
t_html,
t_body;
#include "..\TWB\img_cache.h"
#include "..\TWB\links.h"
dword bufpointer=0;
dword bufsize=0;
int body_magrin=6;
int basic_line_h=22;
char header[150];
char oldtag[100];
scroll_bar scroll_wv = { 15,200,398,44,0,2,115,15,0,0xeeeeee,0xBBBbbb,0xeeeeee,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1};
//============================================================================================
void TWebBrowser::DrawStyle()
{
dword start_x, line_length, stolbec_len;
if (!header)
{
strncpy(#header, #line, sizeof(header)-1);
line = 0;
return;
}
if (t_html) && (!t_body) return;
if (line)
{
start_x = stolbec * list.font_w + body_magrin + 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);
}
DrawBuf.WriteText(start_x, draw_y, list.font_type, text_colors[text_color_index], #line);
if (style.b) DrawBuf.WriteText(start_x+1, draw_y, list.font_type, text_colors[text_color_index], #line);
if (style.s) DrawBuf.DrawBar(start_x, list.item_h / 2 - zoom + draw_y, line_length, zoom, text_colors[text_color_index]);
if (style.u) DrawBuf.DrawBar(start_x, list.item_h - zoom - zoom + draw_y, line_length, zoom, text_colors[text_color_index]);
if (link) {
if (line[0]==' ') && (line[1]==NULL) {} else {
DrawBuf.DrawBar(start_x, draw_y + list.item_h - calc(zoom*2), line_length, zoom, link_color_inactive);
PageLinks.AddText(start_x, draw_y + list.y, line_length, list.item_h - calc(zoom*2), UNDERLINE, 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 =
style.li = link = text_color_index = text_colors[0] = style.li_tab = false;
style.align = ALIGN_LEFT;
link_color_inactive = 0x0000FF;
link_color_active = 0xFF0000;
page_bg = 0xFFFFFF;
style.bg_color = page_bg;
DrawBuf.Fill(0, page_bg);
PageLinks.Clear();
anchors.clear();
strncpy(#header, #version, sizeof(header)-1);
cur_encoding = CH_NULL;
draw_y = body_magrin;
stolbec = 0;
line = 0;
zoom = 1;
if (o_bufpointer) free(o_bufpointer);
o_bufpointer = 0;
}
//============================================================================================
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(){
word bukva[2];
char unicode_symbol[10];
dword unicode_symbol_result;
dword j;
bool ignor_param=false;
int tab_len;
dword bufpos;
SetPageDefaults();
if (strstri(bufpointer, "<body")==-1) {
t_body = true;
if (strstri(bufpointer, "<html")==-1) style.pre = true; //show linebreaks for a plaint text
}
for (bufpos=bufpointer ; (bufpos < bufpointer+bufsize) && (ESBYTE[bufpos]!=0) ; bufpos++;)
{
bukva = ESBYTE[bufpos];
switch (bukva)
{
case 0x0a:
if (style.pre) {
DrawStyle();
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<tab_len; j++;) chrcat(#line,' ');
} else {
AddCharToTheLine(0x09);
}
break;
case '&': //&nbsp; and so on
for (j=1, unicode_symbol=0; (ESBYTE[bufpos+j]<>';') && (j<8); j++)
{
bukva = ESBYTE[bufpos+j];
chrcat(#unicode_symbol, bukva);
}
if (bukva = GetUnicodeSymbol(#unicode_symbol)) {
bufpos += j;
CheckForLineBreak();
} else {
AddCharToTheLine('&');
}
break;
case '<':
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 == '\9') || (bukva == '\x0a') || (bukva == '\x0d') bukva = ' ';
if (!ignor_param) && (bukva <>' ')
{
if (strlen(#tag.name)+1<sizeof(tag.name)) chrcat(#tag.name, bukva);
}
else
{
ignor_param = true;
if (strlen(#tag.params)+1<sizeof(tag.params)) strcat(#tag.params, #bukva);
// 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, "</%s>", #tag.name);
j = strstri(bufpos, #tag.params);
if (j!=-1) 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) && (!tag.is("i")) && (!tag.is("svg")) {
CheckForLineBreak();
DrawStyle();
if (tag.name) SetStyle();
}
strncpy(#oldtag, #tag.name, sizeof(oldtag)-1);
break;
default:
AddCharToTheLine(ESBYTE[bufpos]);
}
}
DrawStyle();
NewLine();
list.count = draw_y;
DrawPage();
}
//============================================================================================
bool TWebBrowser::CheckForLineBreak()
{
int line_break_pos;
char new_line_text[4096];
if (strlen(#line)*zoom + stolbec < list.column_max) return false;
line_break_pos = strrchr(#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--;
}
if (!line_break_pos) && (strlen(#line)*zoom>list.column_max) {
line_break_pos=list.column_max/zoom;
if (!stolbec)&&(style.pre) draw_y-=list.item_h; //hack to fix https://prnt.sc/rk3kyt
}
strcpy(#new_line_text, #line + line_break_pos);
line[line_break_pos] = 0x00;
DrawStyle();
strcpy(#line, #new_line_text);
NewLine();
//if (strlen(#line)*zoom + stolbec > list.column_max)CheckForLineBreak();
return true;
}
//============================================================================================
void TWebBrowser::SetStyle() {
char img_path[4096]=0;
int meta_encoding;
dword value;
if (tag.is("html")) {
t_html = tag.opened;
return;
}
if(tag.is("title")) {
if (tag.opened) header=NULL;
return;
}
IF(tag.is("q"))
{
if (tag.opened) {
meta_encoding = strlen(#line);
if (line[meta_encoding-1] != ' ') chrcat(#line, ' ');
chrcat(#line, '\"');
}
if (!tag.opened) strcat(#line, "\" ");
return;
}
if (value = tag.get_value_of("name=")) || (value = tag.get_value_of("id=")) {
anchors.add(value, draw_y);
}
if (tag.is("body")) {
t_body = tag.opened;
if (value = tag.get_value_of("link=")) link_color_inactive = 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);
}
if (tag.opened) {
if (cur_encoding==CH_NULL) {
cur_encoding = CH_CP866;
//BufEncode(CH_UTF8);
debugln("Document has no information about encoding!");
}
if (!streq(#header, #version)) {
ChangeCharset(charsets[cur_encoding], "CP866", #header);
strncat(#header, " - ", sizeof(header)-1);
strncat(#header, #version, sizeof(header)-1);
}
DrawTitle(#header);
}
return;
}
if (tag.is("a")) {
if (tag.opened)
{
if (link) IF(text_color_index > 0) text_color_index--; //åñëè ïðåäûäóùèé òåã à íå áûë çàêðûò
if (value = tag.get_value_of("href=")) && (!strstr(value,"javascript:"))
{
text_color_index++;
text_colors[text_color_index] = text_colors[text_color_index-1];
link = 1;
text_colors[text_color_index] = link_color_inactive;
PageLinks.AddLink(value);
}
} else {
link = 0;
IF(text_color_index > 0) text_color_index--;
}
return;
}
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(#oldtag,"div")) && (tag.opened) return;
NewLine();
//IF (oldtag[0] != 'h')
return;
}
if (tag.is("header")) || (tag.is("article")) || (tag.is("footer")) || (tag.is("figure")) {
NewLine();
return;
}
if (tag.is("p")) {
IF (oldtag[0] == 'h') || (streq(#oldtag,"td")) || (streq(#oldtag,"p")) return;
NewLine();
//IF(tag.opened) NewLine();
return;
}
if (tag.is("br")) { NewLine(); return; }
if (tag.is("tr")) { if (tag.opened) NewLine(); return; }
if (tag.is("b")) || (tag.is("strong")) || (tag.is("big")) { style.b = tag.opened; 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("dd")) { stolbec += 5; return; }
if (tag.is("blockquote")) { style.blq = tag.opened; return; }
if (tag.is("pre")) || (tag.is("code")) { 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)<sizeof(line)-3) && (value) sprintf(#line, "[%s]", value);
if (value = tag.get_value_of("alt=")) && (strlen(value)<sizeof(line)-3) && (value) sprintf(#line, "[%s]", 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()) {};
DrawStyle();
text_color_index--;
style.image = false;
//ImgCache.Images( list.x, draw_y, WB1.list.w);
return;
}
if (tag.is("h1")) || (tag.is("h2")) || (tag.is("h3")) || (tag.is("caption")) {
style.h = tag.opened;
if (tag.opened)
{
NewLine();
draw_y += 10;
WB1.zoom=2;
WB1.list.font_type |= 10011001b;
if (value = tag.get_value_of("align=")) {
if (streq(value, "center")) style.align = ALIGN_CENTER;
if (streq(value, "right")) style.align = ALIGN_RIGHT;
}
list.item_h = basic_line_h * 2;
if (tag.is("h1")) style.b = true;
}
else
{
if (tag.is("h1")) style.b = false;
NewLine();
WB1.zoom=1;
WB1.list.font_type = 10011000b;
style.align = ALIGN_LEFT;
list.item_h = basic_line_h;
}
return;
}
if (tag.is("dt")) {
style.li = tag.opened;
if (tag.opened) NewLine();
return;
}
if (tag.is("li")) || (tag.is("dt"))
{
style.li = tag.opened;
if (tag.opened)
{
NewLine();
stolbec = style.li_tab * 5 - 2;
strcpy(#line, "\31 ");
//stolbec-=2;
}
return;
}
if (tag.is("ul")) || (tag.is("ol")) {
if (!tag.opened)
{
style.li = tag.opened;
style.li_tab--;
NewLine();
}
else style.li_tab++;
}
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 (tag.is("meta")) || (tag.is("?xml")) {
meta_encoding = CH_NULL;
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")) meta_encoding = CH_UTF8;
else if (streq(value,"windows-1251")) || (streq(value,"windows1251")) meta_encoding = CH_CP1251;
else if (streq(value,"dos")) || (streq(value,"cp-866")) meta_encoding = CH_CP866;
else if (streq(value,"iso-8859-5")) || (streq(value,"iso8859-5")) meta_encoding = CH_ISO8859_5;
else if (streq(value,"koi8-r")) || (streq(value,"koi8-u")) meta_encoding = CH_KOI8;
}
if (meta_encoding!=CH_NULL) BufEncode(meta_encoding);
return;
}
}
//============================================================================================
void TWebBrowser::BufEncode(dword set_new_encoding)
{
if (cur_encoding == set_new_encoding) return;
if (o_bufpointer==0) {
o_bufpointer = malloc(bufsize);
strcpy(o_bufpointer, bufpointer);
} else {
strcpy(bufpointer, o_bufpointer);
}
//debugval("cur_encoding ", cur_encoding);
//debugval("set_new_encoding", set_new_encoding);
cur_encoding = set_new_encoding;
bufpointer = ChangeCharset(charsets[cur_encoding], "CP866", bufpointer);
}
//============================================================================================
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::NewLine()
{
dword onleft, ontop;
static int empty_line=0;
if (!stolbec) && (draw_y==body_magrin) return;
if (style.li) && (stolbec == style.li_tab * 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_magrin;
ontop = draw_y + list.y;
if (t_html) && (!t_body) return;
draw_y += list.item_h;
if (style.blq) stolbec = 6; else stolbec = 0;
if (style.li) stolbec = style.li_tab * 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();
}