forked from KolibriOS/kolibrios
318 lines
8.3 KiB
C
318 lines
8.3 KiB
C
#include "TWB\colors.h"
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#include "TWB\anchors.h"
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#include "TWB\parse_tag.h"
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#include "TWB\special.h"
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#include "TWB\tag_list.h"
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#define DEFAULT_BG_COL 0xffEBE8E9;
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dword link_color_default;
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dword link_color_active;
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#include "TWB\links.h"
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#define BODY_MARGIN 6
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#define BASIC_CHAR_W 8
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#define BASIC_LINE_H 18
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char line[500];
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struct STYLE {
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bool
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b, u, s, h,
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font,
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pre,
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blq,
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button,
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image;
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LIST tag_list;
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dword title;
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dword cur_line_h;
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void reset();
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};
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void STYLE::reset()
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{
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b = u = s = h = blq = pre = title = false;
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font = false;
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cur_line_h = NULL;
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tag_list.reset();
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}
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struct TWebBrowser {
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llist list;
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STYLE style;
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dword draw_y, draw_x, draw_w, left_gap;
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dword o_bufpointer;
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int cur_encoding, custom_encoding;
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bool link, t_html, t_body;
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dword bufpointer;
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dword bufsize;
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dword is_html;
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collection img_url;
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char header[150];
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char redirect[URL_SIZE];
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void SetStyle();
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void Render();
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bool RenderImage();
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void SetPageDefaults();
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void AddCharToTheLine();
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void ParseHtml();
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bool CheckForLineBreak();
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void NewLine();
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void ChangeEncoding();
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void DrawPage();
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void tag_a();
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void tag_p();
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void tag_img();
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void tag_div();
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void tag_h1234_caption();
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void tag_ol_ul_dt();
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void tag_li();
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void tag_q();
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void tag_hr();
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void tag_code();
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void tag_meta_xml();
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void tag_body();
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void tag_iframe();
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void tag_title();
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void tag_font();
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void tag_table();
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void tag_td();
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void tag_tr();
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};
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#include "TWB\render.h"
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#include "TWB\set_style.h"
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//============================================================================================
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void TWebBrowser::SetPageDefaults()
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{
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t_html = t_body = link = false;
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style.reset();
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link_color_default = 0x0000FF;
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link_color_active = 0xFF0000;
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style.cur_line_h = list.item_h;
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links.clear();
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anchors.clear();
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img_url.drop();
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text_colors.drop();
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text_colors.add(0);
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bg_colors.drop();
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bg_colors.add(DEFAULT_BG_COL);
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canvas.Fill(0, DEFAULT_BG_COL);
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header = NULL;
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cur_encoding = CH_CP866;
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draw_y = BODY_MARGIN;
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draw_x = left_gap = BODY_MARGIN;
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draw_w = list.w - BODY_MARGIN;
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line = 0;
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redirect = '\0';
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//hold original buffer
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if (o_bufpointer) o_bufpointer=free(o_bufpointer);
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o_bufpointer = malloc(bufsize);
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memmov(o_bufpointer, bufpointer, bufsize);
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if (custom_encoding != -1) {
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cur_encoding = custom_encoding;
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bufpointer = ChangeCharset(cur_encoding, "CP866", bufpointer);
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}
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list.SetFont(8, 14, 10011000b);
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}
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//============================================================================================
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void TWebBrowser::ParseHtml(dword _bufpointer, _bufsize){
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char unicode_symbol[10];
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dword j;
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int tab_len;
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dword bufpos;
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bufsize = _bufsize;
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if (list.w!=canvas.bufw) canvas.Init(list.x, list.y, list.w, 400*20);
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if (bufpointer != _bufpointer) {
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bufpointer = malloc(bufsize);
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memmov(bufpointer, _bufpointer, bufsize);
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} else {
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custom_encoding = CH_CP866;
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}
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SetPageDefaults();
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is_html = true;
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if (!strstri(bufpointer, "<body")) {
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t_body = true;
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if (!strstri(bufpointer, "<html")) && (!strstr(bufpointer, "<?xml")) && (!strstr(bufpointer, "<xml")) {
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style.pre = true; //show linebreaks for a plaint text
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is_html = false;
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}
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}
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for (bufpos=bufpointer ; (bufpos < bufpointer+bufsize) && (ESBYTE[bufpos]!=0) ; bufpos++;)
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{
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switch (ESBYTE[bufpos])
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{
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case 0x0a:
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if (style.pre) {
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Render();
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NewLine();
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} else {
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AddCharToTheLine(' ');
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}
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break;
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case 0x09:
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if (style.pre) {
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tab_len = draw_x - left_gap / list.font_w + strlen(#line) % 4;
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if (!tab_len) tab_len = 4; else tab_len = 4 - tab_len;
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for (j=0; j<tab_len; j++;) chrcat(#line,' ');
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} else {
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AddCharToTheLine(' ');
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}
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break;
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case '&': // and so on
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for (j=1, unicode_symbol=0; (ESBYTE[bufpos+j]<>';') && (!__isWhite(ESBYTE[bufpos+j])) && (j<8); j++)
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{
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chrcat(#unicode_symbol, ESBYTE[bufpos+j]);
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}
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if (GetUnicodeSymbol(#line, #unicode_symbol, sizeof(line)-1)) {
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bufpos += j;
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CheckForLineBreak();
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} else {
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AddCharToTheLine('&');
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}
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break;
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case '<':
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if (!is_html) goto _DEFAULT;
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if (!strchr("!/?abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ", ESBYTE[bufpos+1])) goto _DEFAULT;
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bufpos++;
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if (tag.parse(#bufpos, bufpointer + bufsize)) {
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CheckForLineBreak();
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Render();
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$push cur_encoding
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SetStyle();
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$pop eax
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// The thing is that UTF if longer than other encodings.
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// So if encoding was changed from UTF to DOS than $bufpos position got wrong,
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// and we have to start parse from the very beginning
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if (EAX != cur_encoding) && (cur_encoding == CH_UTF8) {
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ParseHtml(bufpointer, bufsize);
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return;
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}
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}
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break;
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default:
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_DEFAULT:
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AddCharToTheLine(ESBYTE[bufpos]);
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}
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}
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Render();
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NewLine();
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list.count = draw_y;
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canvas.bufh = math.max(list.visible, draw_y);
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buf_data = realloc(buf_data, canvas.bufh * canvas.bufw * 4 + 8);
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list.CheckDoesValuesOkey();
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anchors.current = NULL;
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custom_encoding = -1;
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if (!header) {
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strncpy(#header, #version, sizeof(TWebBrowser.header)-1);
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DrawTitle(#header);
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}
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}
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//============================================================================================
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void TWebBrowser::AddCharToTheLine(unsigned char _char)
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{
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dword line_len;
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if (_char<=15) _char=' ';
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line_len = strlen(#line);
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if (!style.pre) && (_char == ' ')
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{
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if (line[line_len-1]==' ') return; //no double spaces
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if (draw_x==left_gap) && (!line) return; //no paces at the beginning of the line
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if (link) && (line_len==0) return;
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}
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if (line_len < sizeof(line)) chrcat(#line, _char);
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CheckForLineBreak();
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}
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//============================================================================================
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bool TWebBrowser::CheckForLineBreak()
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{
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int break_pos;
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char next_line[4096];
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int zoom = list.font_w / BASIC_CHAR_W;
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//Do we need a line break?
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if (strlen(#line) * list.font_w + draw_x < draw_w) return false;
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//Yes, we do. Lets calculate where...
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break_pos = strrchr(#line, ' ');
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//Is a new line fits in the current line?
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if (break_pos * list.font_w + draw_x > draw_w) {
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break_pos = draw_w - draw_x /list.font_w;
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while(break_pos) && (line[break_pos]!=' ') break_pos--;
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}
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//Maybe a new line is too big for the whole new line? Then we have to split it
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if (!break_pos) && (style.tag_list.level*5 + strlen(#line) * zoom >= list.column_max) {
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break_pos = draw_w - draw_x / list.font_w;
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}
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strcpy(#next_line, #line + break_pos);
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line[break_pos] = 0x00;
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Render();
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strcpy(#line, #next_line);
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NewLine();
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return true;
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}
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//============================================================================================
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void TWebBrowser::NewLine()
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{
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static bool empty_line = true;
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if (draw_x==left_gap) && (draw_y==BODY_MARGIN) return;
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if (t_html) && (!t_body) return;
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if (draw_x == style.tag_list.level * 5 * list.font_w + left_gap) {
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if (!empty_line) empty_line=true; else return;
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} else {
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empty_line = false;
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}
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draw_y += style.cur_line_h;
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style.cur_line_h = list.item_h;
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if (style.blq) draw_x = 6 * list.font_w; else draw_x = 0;
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draw_x += style.tag_list.level * 5 * list.font_w + left_gap;
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}
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//============================================================================================
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void TWebBrowser::ChangeEncoding(int _new_encoding)
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{
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if (cur_encoding == _new_encoding) return;
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cur_encoding = _new_encoding;
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bufpointer = ChangeCharset(cur_encoding, "CP866", bufpointer);
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if (header) {
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ChangeCharset(cur_encoding, "CP866", #header);
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DrawTitle(#header);
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}
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}
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//============================================================================================
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scroll_bar scroll_wv =
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{ 15,NULL,NULL,NULL,0,2,NULL,
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0,0,0xeeeeee,0xBBBbbb,0xeeeeee};
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void TWebBrowser::DrawPage()
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{
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if (list.w!=canvas.bufw) {
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ParseHtml(bufpointer, bufsize);
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}
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canvas.Show(list.first, list.h);
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scroll_wv.max_area = list.count;
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scroll_wv.cur_area = list.visible;
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scroll_wv.position = list.first;
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scroll_wv.all_redraw = 0;
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scroll_wv.start_x = list.x + list.w;
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scroll_wv.start_y = list.y;
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scroll_wv.size_y = list.h;
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if (list.count <= list.visible) {
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DrawBar(scroll_wv.start_x, scroll_wv.start_y, scroll_wv.size_x,
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scroll_wv.size_y, bg_colors.get(0) & 0x00FFFFFF);
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} else {
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scrollbar_v_draw(#scroll_wv);
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}
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} |