#include "bw.h" /* for BrowserWindow */
#include "msg.h"
#include "binaryconst.h"
#include "colors.h"
#include "html_charrefs.h"
#include "utf8.hh"
#include "misc.h"
#include "uicmd.hh"
#include "history.h"
#include "menu.hh"
#include "prefs.h"
#include "capi.h"
#include "html.hh"
#include "html_common.hh"
#include "form.hh"
#include "table.hh"
#include "dw/textblock.hh"
#include "dw/bullet.hh"
#include "dw/listitem.hh"
#include "dw/image.hh"
#include "dw/ruler.hh"
/*-----------------------------------------------------------------------------
* Defines
*---------------------------------------------------------------------------*/
/* Define to 1 to ignore white space immediately after an open tag,
* and immediately before a close tag. */
#define SGML_SPCDEL 0
#define TAB_SIZE 8
/*-----------------------------------------------------------------------------
* Name spaces
*---------------------------------------------------------------------------*/
using namespace lout;
using namespace dw;
using namespace dw::core;
using namespace dw::core::ui;
using namespace dw::core::style;
/*-----------------------------------------------------------------------------
* Typedefs
*---------------------------------------------------------------------------*/
class DilloHtml;
typedef void (*TagOpenFunct) (DilloHtml *html, const char *tag, int tagsize);
typedef void (*TagCloseFunct) (DilloHtml *html);
typedef enum {
SEEK_ATTR_START,
MATCH_ATTR_NAME,
SEEK_TOKEN_START,
SEEK_VALUE_START,
SKIP_VALUE,
GET_VALUE,
FINISHED
} DilloHtmlTagParsingState;
typedef enum {
HTML_LeftTrim = 1 << 0,
HTML_RightTrim = 1 << 1,
HTML_ParseEntities = 1 << 2
} DilloHtmlTagParsingFlags;
/*
* Exported function with C linkage.
*/
extern "C" {
void *a_Html_text(const char *type, void *P, CA_Callback_t *Call,void **Data);
}
/*-----------------------------------------------------------------------------
* Forward declarations
*---------------------------------------------------------------------------*/
static int Html_write_raw(DilloHtml *html, char *buf, int bufsize, int Eof);
static bool Html_load_image(BrowserWindow *bw, DilloUrl *url,
const DilloUrl *requester, DilloImage *image);
static void Html_callback(int Op, CacheClient_t *Client);
static void Html_tag_cleanup_at_close(DilloHtml *html, int TagIdx);
/*-----------------------------------------------------------------------------
* Local Data
*---------------------------------------------------------------------------*/
/* Parsing table structure */
typedef struct {
const char *name; /* element name */
unsigned char Flags; /* flags (explained near the table data) */
char EndTag; /* Is it Required, Optional or Forbidden */
uchar_t TagLevel; /* Used to heuristically parse bad HTML */
TagOpenFunct open; /* Open function */
TagOpenFunct content; /* Content function */
TagCloseFunct close; /* Close function */
} TagInfo;
extern const TagInfo Tags[];
/*-----------------------------------------------------------------------------
*-----------------------------------------------------------------------------
* Main Code
*-----------------------------------------------------------------------------
*---------------------------------------------------------------------------*/
/*
* Collect HTML error strings.
*/
void DilloHtml::bugMessage(const char *format, ... )
{
va_list argp;
if (bw->num_page_bugs)
dStr_append_c(bw->page_bugs, '\n');
dStr_sprintfa(bw->page_bugs,
"HTML warning: line %d, ",
getCurrLineNumber());
va_start(argp, format);
dStr_vsprintfa(bw->page_bugs, format, argp);
va_end(argp);
a_UIcmd_set_bug_prog(bw, ++bw->num_page_bugs);
}
/*
* Wrapper for a_Url_new that adds an error detection message.
* If use_base_url is TRUE, it uses base_url. Otherwise it uses html->base_url.
*/
DilloUrl *a_Html_url_new(DilloHtml *html,
const char *url_str, const char *base_url,
int use_base_url)
{
DilloUrl *url;
int n_ic, n_ic_spc;
url = a_Url_new(url_str,
(use_base_url) ? base_url : URL_STR_(html->base_url));
if ((n_ic = URL_ILLEGAL_CHARS(url)) != 0) {
const char *suffix = (n_ic) > 1 ? "s" : "";
n_ic_spc = URL_ILLEGAL_CHARS_SPC(url);
if (n_ic == n_ic_spc) {
BUG_MSG("URL has %d illegal space%s ('%s').", n_ic, suffix, url_str);
} else if (n_ic_spc == 0) {
BUG_MSG("URL has %d illegal byte%s in {00-1F, 7F-FF} range ('%s').",
n_ic, suffix, url_str);
} else {
BUG_MSG("URL has %d illegal byte%s: "
"%d space%s and %d in {00-1F, 7F-FF} range ('%s').",
n_ic, suffix,
n_ic_spc, n_ic_spc > 1 ? "s" : "", n_ic-n_ic_spc, url_str);
}
}
return url;
}
/*
* Set callback function and callback data for the "html/text" MIME type.
*/
void *a_Html_text(const char *Type, void *P, CA_Callback_t *Call, void **Data)
{
DilloWeb *web = (DilloWeb*)P;
DilloHtml *html = new DilloHtml(web->bw, web->url, Type);
*Data = (void*)html;
*Call = (CA_Callback_t)Html_callback;
return (void*)html->dw;
}
static void Html_free(void *data)
{
delete ((DilloHtml*)data);
}
/*
* Used by the "Load images" page menuitem.
*/
void a_Html_load_images(void *v_html, DilloUrl *pattern)
{
DilloHtml *html = (DilloHtml*)v_html;
html->loadImages(pattern);
}
/*
* Search for form
*/
static bool Html_contains_form(DilloHtml *html, void *v_form)
{
for (int i = 0; i < html->forms->size(); i++) {
if (html->forms->get(i) == v_form) {
return true;
}
}
return false;
}
/*
* Used by the "Submit form" form menuitem.
*/
void a_Html_form_submit(void *v_html, void *v_form)
{
DilloHtml *html = (DilloHtml*)v_html;
if (Html_contains_form(html, v_form)) {
/* it's still valid */
a_Html_form_submit2(v_form);
}
}
/*
* Used by the "Reset form" form menuitem.
*/
void a_Html_form_reset(void *v_html, void *v_form)
{
DilloHtml *html = (DilloHtml*)v_html;
if (Html_contains_form(html, v_form)) {
/* it's still valid */
a_Html_form_reset2(v_form);
}
}
/*
* Used by the "Show/Hide hiddens" form menuitem.
*/
void a_Html_form_display_hiddens(void *v_html, void *v_form, bool_t display)
{
DilloHtml *html = (DilloHtml*)v_html;
if (Html_contains_form(html, v_form)) {
/* it's still valid */
a_Html_form_display_hiddens2(v_form, (display != 0));
}
}
/*
* Set the URL data for image maps.
*/
static void Html_set_link_coordinates(DilloHtml *html, int link, int x, int y)
{
char data[64];
if (x != -1) {
snprintf(data, 64, "?%d,%d", x, y);
a_Url_set_ismap_coords(html->links->get(link), data);
}
}
/*
* Create a new link, set it as the url's parent
* and return the index.
*/
static int Html_set_new_link(DilloHtml *html, DilloUrl **url)
{
int nl = html->links->size();
html->links->increase();
html->links->set(nl, (*url) ? *url : NULL);
return nl;
}
/*
* Evaluates the ALIGN attribute (left|center|right|justify) and
* sets the style at the top of the stack.
*/
void a_Html_tag_set_align_attr(DilloHtml *html, const char *tag, int tagsize)
{
const char *align;
if ((align = a_Html_get_attr(html, tag, tagsize, "align"))) {
TextAlignType textAlignType = TEXT_ALIGN_LEFT;
if (html->DocType == DT_HTML && html->DocTypeVersion >= 5.0f)
BUG_MSG("The align attribute is obsolete in HTML5.");
if (dStrAsciiCasecmp (align, "left") == 0)
textAlignType = TEXT_ALIGN_LEFT;
else if (dStrAsciiCasecmp (align, "right") == 0)
textAlignType = TEXT_ALIGN_RIGHT;
else if (dStrAsciiCasecmp (align, "center") == 0)
textAlignType = TEXT_ALIGN_CENTER;
else if (dStrAsciiCasecmp (align, "justify") == 0)
textAlignType = TEXT_ALIGN_JUSTIFY;
#if 0
else if (dStrAsciiCasecmp (align, "char") == 0) {
/* TODO: Actually not supported for etc. */
v.textAlign = TEXT_ALIGN_STRING;
if ((charattr = a_Html_get_attr(html, tag, tagsize, "char"))) {
if (charattr[0] == 0)
/* TODO: ALIGN=" ", and even ALIGN="&32;" will reult in
* an empty string (don't know whether the latter is
* correct, has to be clarified with the specs), so
* that for empty strings, " " is assumed. */
style_attrs.textAlignChar = ' ';
else
style_attrs.textAlignChar = charattr[0];
} else
/* TODO: Examine LANG attr of . */
style_attrs.textAlignChar = '.';
}
#endif
html->styleEngine->setNonCssHint(CSS_PROPERTY_TEXT_ALIGN, CSS_TYPE_ENUM,
textAlignType);
}
}
/*
* Evaluates the VALIGN attribute (top|bottom|middle|baseline) and
* sets the style in style_attrs. Returns true when set.
*/
bool a_Html_tag_set_valign_attr(DilloHtml *html, const char *tag, int tagsize)
{
const char *attr;
VAlignType valign;
if ((attr = a_Html_get_attr(html, tag, tagsize, "valign"))) {
if (html->DocType == DT_HTML && html->DocTypeVersion >= 5.0f)
BUG_MSG("The valign attribute is obsolete in HTML5.");
if (dStrAsciiCasecmp (attr, "top") == 0)
valign = VALIGN_TOP;
else if (dStrAsciiCasecmp (attr, "bottom") == 0)
valign = VALIGN_BOTTOM;
else if (dStrAsciiCasecmp (attr, "baseline") == 0)
valign = VALIGN_BASELINE;
else
valign = VALIGN_MIDDLE;
html->styleEngine->setNonCssHint (CSS_PROPERTY_VERTICAL_ALIGN,
CSS_TYPE_ENUM, valign);
return true;
} else
return false;
}
/*
* Create and add a new Textblock to the current Textblock. Typically
* only one of addBreaks and addBreakOpt is true.
*/
static void Html_add_textblock(DilloHtml *html, bool addBreaks, int breakSpace,
bool addBreakOpt)
{
Textblock *textblock = new Textblock (prefs.limit_text_width);
Style *style;
if (addBreaks) {
StyleAttrs attrs = *(html->style ());
attrs.display = DISPLAY_BLOCK;
style = Style::create (&attrs);
} else {
style = html->style ();
style->ref ();
}
if (addBreaks)
HT2TB(html)->addParbreak (breakSpace, html->wordStyle ());
HT2TB(html)->addWidget (textblock, style); /* Works also for floats etc. */
if (addBreakOpt)
HT2TB(html)->addBreakOption (html->style (), false);
if (addBreaks)
HT2TB(html)->addParbreak (breakSpace, html->wordStyle ());
S_TOP(html)->textblock = html->dw = textblock;
if (addBreaks)
S_TOP(html)->hand_over_break = true;
style->unref ();
}
static bool Html_must_add_breaks(DilloHtml *html)
{
return HT2TB(html)->mustAddBreaks (html->style ());
}
/*
* Create and initialize a new DilloHtml class
*/
DilloHtml::DilloHtml(BrowserWindow *p_bw, const DilloUrl *url,
const char *content_type)
{
/* Init main variables */
bw = p_bw;
page_url = a_Url_dup(url);
base_url = a_Url_dup(url);
dw = NULL;
/* Init event receiver */
linkReceiver.html = this;
HT2LT(this)->connectLink (&linkReceiver);
a_Bw_add_doc(p_bw, this);
/* Init for-parsing variables */
Start_Buf = NULL;
Start_Ofs = 0;
_MSG("DilloHtml(): content type: %s\n", content_type);
this->content_type = dStrdup(content_type);
/* get charset */
a_Misc_parse_content_type(content_type, NULL, NULL, &charset);
stop_parser = false;
CurrOfs = OldOfs = 0;
OldLine = 1;
DocType = DT_NONE; /* assume Tag Soup 0.0! :-) */
DocTypeVersion = 0.0f;
styleEngine = new StyleEngine (HT2LT (this), page_url, base_url);
cssUrls = new misc::SimpleVector (1);
stack = new misc::SimpleVector (16);
stack->increase();
stack->getRef(0)->parse_mode = DILLO_HTML_PARSE_MODE_INIT;
stack->getRef(0)->table_mode = DILLO_HTML_TABLE_MODE_NONE;
stack->getRef(0)->table_border_mode = DILLO_HTML_TABLE_BORDER_SEPARATE;
stack->getRef(0)->cell_text_align_set = false;
stack->getRef(0)->display_none = false;
stack->getRef(0)->list_type = HTML_LIST_NONE;
stack->getRef(0)->list_number = 0;
stack->getRef(0)->tag_idx = -1; /* MUST not be used */
stack->getRef(0)->textblock = NULL;
stack->getRef(0)->table = NULL;
stack->getRef(0)->ref_list_item = NULL;
stack->getRef(0)->hand_over_break = false;
InFlags = IN_NONE;
Stash = dStr_new("");
StashSpace = false;
pre_column = 0;
PreFirstChar = false;
PrevWasCR = false;
InVisitedLink = false;
ReqTagClose = false;
TagSoup = true;
loadCssFromStash = false;
PrevWasBodyClose = false;
PrevWasHtmlClose = false;
Num_HTML = Num_HEAD = Num_BODY = Num_TITLE = 0;
attr_data = dStr_sized_new(1024);
non_css_link_color = -1;
non_css_visited_color = -1;
visited_color = -1;
/* Init page-handling variables */
forms = new misc::SimpleVector (1);
inputs_outside_form = new misc::SimpleVector (1);
links = new misc::SimpleVector (64);
images = new misc::SimpleVector (16);
/* Initialize the main widget */
initDw();
/* Hook destructor to the dw delete call */
dw->setDeleteCallback(Html_free, this);
}
/*
* Miscellaneous initializations for Dw
*/
void DilloHtml::initDw()
{
dReturn_if_fail (dw == NULL);
/* Create the main widget */
dw = stack->getRef(0)->textblock = new Textblock (prefs.limit_text_width);
bw->num_page_bugs = 0;
dStr_truncate(bw->page_bugs, 0);
}
/*
* Free memory used by the DilloHtml class.
*/
DilloHtml::~DilloHtml()
{
_MSG("::~DilloHtml(this=%p)\n", this);
freeParseData();
a_Bw_remove_doc(bw, this);
a_Url_free(page_url);
a_Url_free(base_url);
for (int i = 0; i < cssUrls->size(); i++)
a_Url_free(cssUrls->get(i));
delete (cssUrls);
for (int i = 0; i < forms->size(); i++)
a_Html_form_delete (forms->get(i));
delete(forms);
for (int i = 0; i < inputs_outside_form->size(); i++)
a_Html_input_delete(inputs_outside_form->get(i));
delete(inputs_outside_form);
for (int i = 0; i < links->size(); i++)
a_Url_free(links->get(i));
delete (links);
for (int i = 0; i < images->size(); i++) {
DilloHtmlImage *img = images->get(i);
a_Url_free(img->url);
a_Image_unref(img->image);
dFree(img);
}
delete (images);
delete styleEngine;
}
/*
* Process the newly arrived html and put it into the page structure.
* (This function is called by Html_callback whenever there's new data)
*/
void DilloHtml::write(char *Buf, int BufSize, int Eof)
{
int token_start;
char *buf = Buf + Start_Ofs;
int bufsize = BufSize - Start_Ofs;
_MSG("DilloHtml::write BufSize=%d Start_Ofs=%d\n", BufSize, Start_Ofs);
#if 0
char *aux = dStrndup(Buf, BufSize);
MSG(" {%s}\n", aux);
dFree(aux);
#endif
/* Update Start_Buf. It may be used after the parser is stopped */
Start_Buf = Buf;
dReturn_if (dw == NULL);
dReturn_if (stop_parser == true);
token_start = Html_write_raw(this, buf, bufsize, Eof);
Start_Ofs += token_start;
}
/*
* Return the line number of the tag/word being processed by the parser.
* Also update the offsets.
*/
int DilloHtml::getCurrLineNumber()
{
int i, ofs, line;
const char *p = Start_Buf;
dReturn_val_if_fail(p != NULL, -1);
/* Disable line counting for META hack. Buffers differ. */
dReturn_val_if((InFlags & IN_META_HACK), -1);
ofs = CurrOfs;
line = OldLine;
for (i = OldOfs; i < ofs; ++i)
if (p[i] == '\n' || (p[i] == '\r' && p[i+1] != '\n'))
++line;
OldOfs = CurrOfs;
OldLine = line;
return line;
}
/*
* Free parsing data.
*/
void DilloHtml::freeParseData()
{
delete(stack);
dStr_free(Stash, TRUE);
dStr_free(attr_data, TRUE);
dFree(content_type);
dFree(charset);
}
/*
* Finish parsing a HTML page. Close the parser and close the client.
* The class is not deleted here, it remains until the widget is destroyed.
*/
void DilloHtml::finishParsing(int ClientKey)
{
int si;
dReturn_if (stop_parser == true);
/* flag we've already parsed up to the last byte */
InFlags |= IN_EOF;
/* force the close of elements left open (TODO: not for XHTML) */
while ((si = stack->size() - 1)) {
if (stack->getRef(si)->tag_idx != -1) {
Html_tag_cleanup_at_close(this, stack->getRef(si)->tag_idx);
}
}
/* Nothing left to do with the parser. Clear all flags, except EOF. */
InFlags = IN_EOF;
/* Remove this client from our active list */
a_Bw_close_client(bw, ClientKey);
}
/*
* Allocate and insert form information.
*/
int DilloHtml::formNew(DilloHtmlMethod method, const DilloUrl *action,
DilloHtmlEnc enc, const char *charset)
{
// avoid data loss on repush after CSS stylesheets have been loaded
bool enabled = bw->NumPendingStyleSheets == 0;
DilloHtmlForm *form = a_Html_form_new (this, method, action,
enc, charset, enabled);
int nf = forms->size ();
forms->increase ();
forms->set (nf, form);
_MSG("Html formNew: action=%s nform=%d\n", action, nf);
return forms->size();
}
/*
* Get the current form.
*/
DilloHtmlForm *DilloHtml::getCurrentForm ()
{
return forms->get (forms->size() - 1);
}
bool_t DilloHtml::unloadedImages()
{
for (int i = 0; i < images->size(); i++) {
if (images->get(i)->image != NULL) {
return TRUE;
}
}
return FALSE;
}
/*
* Load images if they were disabled.
*/
void DilloHtml::loadImages (const DilloUrl *pattern)
{
dReturn_if (a_Bw_expecting(bw));
/* If the user asked for a specific image, the user (NULL) is the requester,
* and the domain mechanism will always permit the request. But if the user
* just asked for all images (clicking "Load images"), use the page URL as
* the requester so that the domain mechanism can act as a filter.
* If the possible patterns become more complex, it might be good to have
* the caller supply the requester instead.
*/
const DilloUrl *requester = pattern ? NULL : this->page_url;
for (int i = 0; i < images->size(); i++) {
DilloHtmlImage *hi = images->get(i);
if (hi->image) {
assert(hi->url);
if ((!pattern) || (!a_Url_cmp(hi->url, pattern))) {
if (Html_load_image(bw, hi->url, requester, hi->image)) {
a_Image_unref (hi->image);
hi->image = NULL; // web owns it now
}
}
}
}
}
/*
* Save URL in a vector (may be loaded later).
*/
void DilloHtml::addCssUrl(const DilloUrl *url)
{
int nu = cssUrls->size();
cssUrls->increase();
cssUrls->set(nu, a_Url_dup(url));
}
bool DilloHtml::HtmlLinkReceiver::enter (Widget *widget, int link, int img,
int x, int y)
{
BrowserWindow *bw = html->bw;
_MSG(" ** ");
if (link == -1) {
_MSG(" Link LEAVE notify...\n");
a_UIcmd_set_msg(bw, "");
} else {
_MSG(" Link ENTER notify...\n");
Html_set_link_coordinates(html, link, x, y);
a_UIcmd_set_msg(bw, "%s", URL_STR(html->links->get(link)));
}
return true;
}
/*
* Handle the "press" signal.
*/
bool DilloHtml::HtmlLinkReceiver::press (Widget *widget, int link, int img,
int x, int y, EventButton *event)
{
BrowserWindow *bw = html->bw;
int ret = false;
DilloUrl *linkurl = NULL;
_MSG("pressed button %d\n", event->button);
if (event->button == 3) {
// popup menus
if (img != -1) {
// image menu
if (link != -1)
linkurl = html->links->get(link);
const bool_t loaded_img = (html->images->get(img)->image == NULL);
a_UIcmd_image_popup(bw, html->images->get(img)->url, loaded_img,
html->page_url, linkurl);
ret = true;
} else {
if (link == -1) {
a_UIcmd_page_popup(bw, bw->num_page_bugs != 0, html->cssUrls);
ret = true;
} else {
a_UIcmd_link_popup(bw, html->links->get(link));
ret = true;
}
}
}
return ret;
}
/*
* Handle the "click" signal.
*/
bool DilloHtml::HtmlLinkReceiver::click (Widget *widget, int link, int img,
int x, int y, EventButton *event)
{
BrowserWindow *bw = html->bw;
if ((img != -1) && (html->images->get(img)->image)) {
// clicked an image that has not already been loaded
if (event->button == 1){
// load all instances of this image
DilloUrl *pattern = html->images->get(img)->url;
html->loadImages(pattern);
return true;
}
}
if (link != -1) {
DilloUrl *url = html->links->get(link);
_MSG("clicked on URL %d: %s\n", link, a_Url_str (url));
Html_set_link_coordinates(html, link, x, y);
if (event->button == 1) {
a_UIcmd_open_url(bw, url);
} else if (event->button == 2) {
if (prefs.middle_click_opens_new_tab) {
int focus = prefs.focus_new_tab ? 1 : 0;
if (event->state == SHIFT_MASK) focus = !focus;
a_UIcmd_open_url_nt(bw, url, focus);
} else
a_UIcmd_open_url_nw(bw, url);
} else {
return false;
}
/* Change the link color to "visited" as visual feedback */
for (Widget *w = widget; w; w = w->getParent()) {
_MSG(" ->%s\n", w->getClassName());
if (w->instanceOf(dw::Textblock::CLASS_ID)) {
((Textblock*)w)->changeLinkColor (link, html->visited_color);
break;
}
}
}
return true;
}
/*
* Initialize the stash buffer
*/
void a_Html_stash_init(DilloHtml *html)
{
S_TOP(html)->parse_mode = DILLO_HTML_PARSE_MODE_STASH;
html->StashSpace = false;
dStr_truncate(html->Stash, 0);
}
/*
* This is M$ non-standard "smart quotes" (w1252). Now even deprecated by them!
*
* SGML for HTML4.01 defines c >= 128 and c <= 159 as UNUSED.
* TODO: Probably I should remove this hack. --Jcid
*/
static int Html_ms_stupid_quotes_2ucs(int codepoint)
{
int ret;
switch (codepoint) {
case 145:
case 146: ret = '\''; break;
case 147:
case 148: ret = '"'; break;
case 149: ret = 176; break;
case 150:
case 151: ret = '-'; break;
default: ret = codepoint; break;
}
return ret;
}
/*
* Parse a numeric character reference (e.g., "/" or "/").
* The "&#" has already been consumed.
*/
static const char *Html_parse_numeric_charref(DilloHtml *html, char *tok,
bool_t is_attr, int *entsize)
{
static char buf[5];
char *s = tok;
int n, codepoint = -1;
errno = 0;
if (*s == 'x' || *s == 'X') {
if (isxdigit(*++s)) {
/* strtol with base 16 accepts leading "0x" - we don't */
if (*s == '0' && s[1] == 'x') {
s++;
codepoint = 0;
} else {
codepoint = strtol(s, &s, 16);
}
}
} else if (isdigit(*s)) {
codepoint = strtol(s, &s, 10);
}
if (errno)
codepoint = -1;
if (*s == ';')
s++;
else {
if (prefs.show_extra_warnings && (html->DocType == DT_XHTML ||
(html->DocType == DT_HTML && html->DocTypeVersion <= 4.01f))) {
char c = *s;
*s = '\0';
BUG_MSG("Character reference '&#%s' lacks ';'.", tok);
*s = c;
}
/* Don't require ';' for old HTML, except that our current heuristic
* is to require it in attributes to avoid cases like "©=1" found
* in URLs.
*/
if (is_attr || html->DocType == DT_XHTML ||
(html->DocType == DT_HTML && html->DocTypeVersion >= 5.0f)) {
return NULL;
}
}
if ((codepoint < 0x20 && codepoint != '\t' && codepoint != '\n' &&
codepoint != '\f') ||
(codepoint >= 0x7f && codepoint <= 0x9f) ||
(codepoint >= 0xd800 && codepoint <= 0xdfff) || codepoint > 0x10ffff ||
((codepoint & 0xfffe) == 0xfffe) ||
(!(html->DocType == DT_HTML && html->DocTypeVersion >= 5.0f) &&
codepoint > 0xffff)) {
/* this catches null bytes, errors, codes out of range, disallowed
* control chars, permanently undefined chars, and surrogates.
*/
char c = *s;
*s = '\0';
BUG_MSG("Numeric character reference '&#%s' is not valid.", tok);
*s = c;
codepoint = (codepoint >= 145 && codepoint <= 151) ?
Html_ms_stupid_quotes_2ucs(codepoint) : -1;
}
if (codepoint != -1) {
if (codepoint >= 128) {
n = a_Utf8_encode(codepoint, buf);
} else {
n = 1;
buf[0] = (char) codepoint;
}
assert(n < 5);
buf[n] = '\0';
*entsize = s-tok+2;
return buf;
} else {
return NULL;
}
}
/*
* Comparison function for binary search
*/
static int Html_charref_comp(const void *a, const void *b)
{
return strcmp(((Charref_t *)a)->ref, ((Charref_t *)b)->ref);
}
/*
* Binary search of 'key' in charref list
*/
static Charref_t *Html_charref_search(char *key)
{
Charref_t RefKey;
RefKey.ref = key;
return (Charref_t*) bsearch(&RefKey, Charrefs, NumRef,
sizeof(Charref_t), Html_charref_comp);
}
/*
* Parse a named character reference (e.g., "&" or "…").
* The "&" has already been consumed.
*/
static const char *Html_parse_named_charref(DilloHtml *html, char *tok,
bool_t is_attr, int *entsize)
{
Charref_t *p;
char c;
char *s = tok;
const char *ret = NULL;
while (*++s && (isalnum(*s) || strchr(":_.-", *s))) ;
c = *s;
*s = '\0';
if (c != ';') {
if (prefs.show_extra_warnings && (html->DocType == DT_XHTML ||
(html->DocType == DT_HTML && html->DocTypeVersion <= 4.01f)))
BUG_MSG("Character reference '&%s' lacks ';'.", tok);
/* Don't require ';' for old HTML, except that our current heuristic
* is to require it in attributes to avoid cases like "©=1" found
* in URLs.
*/
if (is_attr || html->DocType == DT_XHTML ||
(html->DocType == DT_HTML && html->DocTypeVersion >= 5.0f)) {
return ret;
}
}
if ((p = Html_charref_search(tok))) {
ret = (html->DocType == DT_HTML && html->DocTypeVersion >= 5.0f) ?
p->html5_str : p->html4_str;
}
if (!ret && html->DocType == DT_XHTML && !strcmp(tok, "apos"))
ret = "'";
*s = c;
if (c == ';')
s++;
if (!ret) {
c = *s;
*s = '\0';
BUG_MSG("Undefined character reference '&%s'.", tok);
*s = c;
}
*entsize = s-tok+1;
return ret;
}
/*
* Given an entity, return the corresponding string.
* Returns NULL if not a valid entity.
*
* The first character *token is assumed to be == '&'
*
* For valid entities, *entsize is set to the length of the parsed entity.
*/
static const char *Html_parse_entity(DilloHtml *html, const char *token,
int toksize, int *entsize, bool_t is_attr)
{
const char *ret = NULL;
char *tok;
if (toksize > 50) {
/* In pathological cases, attributes can be megabytes long and filled
* with character references. As of HTML5, the longest defined character
* reference is about 32 bytes long.
*/
toksize = 50;
}
token++;
tok = dStrndup(token, (uint_t)toksize);
if (*tok == '#') {
ret = Html_parse_numeric_charref(html, tok+1, is_attr, entsize);
} else if (isalpha(*tok)) {
ret = Html_parse_named_charref(html, tok, is_attr, entsize);
} else if (prefs.show_extra_warnings &&
(!(html->DocType == DT_HTML && html->DocTypeVersion >= 5.0f))) {
// HTML5 doesn't mind literal '&'s.
BUG_MSG("Literal '&'.");
}
dFree(tok);
return ret;
}
/*
* Parse all the entities in a token. Takes the token and its length, and
* returns a newly allocated string.
*/
char *a_Html_parse_entities(DilloHtml *html, const char *token, int toksize)
{
const char *esc_set = "&";
int i, s, entsize;
char *str;
s = strcspn(token, esc_set);
if (s >= toksize) {
/* no ampersands */
str = dStrndup(token, toksize);
} else {
Dstr *ds = dStr_sized_new(toksize);
dStr_append_l(ds, token, s);
for (i = s; i < toksize; i++) {
const char *entstr;
const bool_t is_attr = FALSE;
if (token[i] == '&' &&
(entstr = Html_parse_entity(html, token+i, toksize-i, &entsize,
is_attr))) {
dStr_append(ds, entstr);
i += entsize-1;
} else {
dStr_append_c(ds, token[i]);
}
}
str = ds->str;
dStr_free(ds, 0);
}
return str;
}
/*
* For white-space: pre-line, we must break the line if encountering a newline.
* Otherwise, collapse whitespace as usual.
*/
static void Html_process_space_pre_line(DilloHtml *html, const char *space,
int spacesize)
{
int i, breakCnt = 0;
for (i = 0; i < spacesize; i++) {
/* Support for "\r", "\n" and "\r\n" line breaks */
if (space[i] == '\r' || (space[i] == '\n' && !html->PrevWasCR)) {
breakCnt++;
html->PrevWasCR = (space[i] == '\r');
HT2TB(html)->addLinebreak (html->wordStyle ());
}
}
if (breakCnt == 0) {
HT2TB(html)->addSpace(html->wordStyle ());
}
}
/*
* Parse spaces
*/
static void Html_process_space(DilloHtml *html, const char *space,
int spacesize)
{
char *spc;
int i, offset;
DilloHtmlParseMode parse_mode = S_TOP(html)->parse_mode;
if (S_TOP(html)->display_none) {
/* do nothing */
} else if (parse_mode == DILLO_HTML_PARSE_MODE_STASH) {
html->StashSpace = (html->Stash->len > 0);
} else if (parse_mode == DILLO_HTML_PARSE_MODE_VERBATIM) {
dStr_append_l(html->Stash, space, spacesize);
} else if (parse_mode == DILLO_HTML_PARSE_MODE_PRE) {
int spaceCnt = 0;
/* re-scan the string for characters that cause line breaks */
for (i = 0; i < spacesize; i++) {
/* Support for "\r", "\n" and "\r\n" line breaks (skips the first) */
if (!html->PreFirstChar &&
(space[i] == '\r' || (space[i] == '\n' && !html->PrevWasCR))) {
if (spaceCnt) {
spc = dStrnfill(spaceCnt, ' ');
HT2TB(html)->addText (spc, spaceCnt, html->wordStyle ());
dFree(spc);
spaceCnt = 0;
}
HT2TB(html)->addLinebreak (html->wordStyle ());
html->pre_column = 0;
}
html->PreFirstChar = false;
/* cr and lf should not be rendered -- they appear as a break */
switch (space[i]) {
case '\r':
case '\n':
break;
case '\t':
if (prefs.show_extra_warnings)
BUG_MSG("TAB character inside .");
offset = TAB_SIZE - html->pre_column % TAB_SIZE;
spaceCnt += offset;
html->pre_column += offset;
break;
default:
spaceCnt++;
html->pre_column++;
break;
}
html->PrevWasCR = (space[i] == '\r');
}
if (spaceCnt) {
// add break possibility for the white-space:pre-wrap case
HT2TB(html)->addBreakOption (html->wordStyle (), false);
spc = dStrnfill(spaceCnt, ' ');
HT2TB(html)->addText (spc, spaceCnt, html->wordStyle ());
dFree(spc);
}
} else {
if (SGML_SPCDEL) {
/* SGML_SPCDEL ignores white space immediately after an open tag */
} else if (html->wordStyle ()->whiteSpace == WHITE_SPACE_PRE_LINE) {
Html_process_space_pre_line(html, space, spacesize);
} else {
HT2TB(html)->addSpace(html->wordStyle ());
}
if (parse_mode == DILLO_HTML_PARSE_MODE_STASH_AND_BODY)
html->StashSpace = (html->Stash->len > 0);
}
}
/*
* Handles putting the word into its proper place
* > STASH and VERBATIM --> html->Stash
* > otherwise it goes through addText()
*
* Entities are parsed (or not) according to parse_mode.
* 'word' is a '\0'-terminated string.
*/
static void Html_process_word(DilloHtml *html, const char *word, int size)
{
int i, j, start;
char *Pword;
DilloHtmlParseMode parse_mode = S_TOP(html)->parse_mode;
if (S_TOP(html)->display_none)
return;
if ((i = html->PrevWasHtmlClose ? 1 : html->PrevWasBodyClose ? 2 : 0)) {
BUG_MSG("Content after tag.", i == 1 ? "html" : "body");
html->PrevWasHtmlClose = html->PrevWasBodyClose = false;
}
if (parse_mode == DILLO_HTML_PARSE_MODE_STASH ||
parse_mode == DILLO_HTML_PARSE_MODE_STASH_AND_BODY) {
if (html->StashSpace) {
dStr_append_c(html->Stash, ' ');
html->StashSpace = false;
}
Pword = a_Html_parse_entities(html, word, size);
dStr_append(html->Stash, Pword);
dFree(Pword);
} else if (parse_mode == DILLO_HTML_PARSE_MODE_VERBATIM) {
/* word goes in untouched, it is not processed here. */
dStr_append_l(html->Stash, word, size);
}
if (parse_mode == DILLO_HTML_PARSE_MODE_STASH ||
parse_mode == DILLO_HTML_PARSE_MODE_VERBATIM) {
/* skip until the closing instructions */
} else if (parse_mode == DILLO_HTML_PARSE_MODE_PRE) {
/* all this overhead is to catch white-space entities */
Pword = a_Html_parse_entities(html, word, size);
for (start = i = 0; Pword[i]; start = i)
if (isspace(Pword[i])) {
while (Pword[++i] && isspace(Pword[i])) ;
Html_process_space(html, Pword + start, i - start);
} else {
while (Pword[++i] && !isspace(Pword[i])) ;
HT2TB(html)->addText(Pword + start, i - start, html->wordStyle ());
html->pre_column += i - start;
html->PreFirstChar = false;
}
dFree(Pword);
} else {
const char *word2, *beyond_word2;
Pword = NULL;
if (!memchr(word,'&', size)) {
/* No entities */
word2 = word;
beyond_word2 = word + size;
} else {
/* Collapse white-space entities inside the word (except ) */
Pword = a_Html_parse_entities(html, word, size);
/* Collapse adjacent " \t\f\n\r" characters into a single space */
for (i = j = 0; (Pword[i] = Pword[j]); ++i, ++j) {
if (strchr(" \t\f\n\r", Pword[i])) {
if (i == 0 || (i > 0 && Pword[i-1] != ' '))
Pword[i] = ' ';
else
for (--i; Pword[j+1] && strchr(" \t\f\n\r", Pword[j+1]); ++j)
;
}
}
word2 = Pword;
beyond_word2 = word2 + strlen(word2);
}
for (start = i = 0; word2[i]; start = i) {
int len;
if (isspace(word2[i])) {
while (word2[++i] && isspace(word2[i])) ;
Html_process_space(html, word2 + start, i - start);
} else if (!strncmp(word2+i, utf8_zero_width_space, 3)) {
i += 3;
HT2TB(html)->addBreakOption(html->wordStyle (), false);
} else if (a_Utf8_ideographic(word2+i, beyond_word2, &len)) {
i += len;
HT2TB(html)->addText(word2 + start, i - start, html->wordStyle ());
HT2TB(html)->addBreakOption(html->wordStyle (), false);
} else {
do {
i += len;
} while (word2[i] && !isspace(word2[i]) &&
strncmp(word2+i, utf8_zero_width_space, 3) &&
(!a_Utf8_ideographic(word2+i, beyond_word2, &len)));
HT2TB(html)->addText(word2 + start, i - start, html->wordStyle ());
}
}
if (Pword == word2)
dFree(Pword);
}
}
/*
* Does the tag in tagstr (e.g. "p") match the tag in the tag, tagsize
* structure, with the initial < skipped over (e.g. "P align=center>")?
*/
static bool Html_match_tag(const char *tagstr, char *tag, int tagsize)
{
int i;
for (i = 0; i < tagsize && tagstr[i] != '\0'; i++) {
if (D_ASCII_TOLOWER(tagstr[i]) != D_ASCII_TOLOWER(tag[i]))
return false;
}
/* The test for '/' is for xml compatibility: "empty/>" will be matched. */
if (i < tagsize && (isspace(tag[i]) || tag[i] == '>' || tag[i] == '/'))
return true;
return false;
}
/*
* This function is called after popping the stack, to
* handle nested Textblock widgets.
*/
static void Html_eventually_pop_dw(DilloHtml *html, bool hand_over_break)
{
if (html->dw != S_TOP(html)->textblock) {
if (hand_over_break)
HT2TB(html)->handOverBreak (html->style ());
HT2TB(html)->flush ();
html->dw = S_TOP(html)->textblock;
}
}
/*
* Push the tag (copying attributes from the top of the stack)
*/
static void Html_push_tag(DilloHtml *html, int tag_idx)
{
int n_items;
n_items = html->stack->size ();
html->stack->increase ();
/* We'll copy the former stack item and just change the tag and its index
* instead of copying all fields except for tag. --Jcid */
*html->stack->getRef(n_items) = *html->stack->getRef(n_items - 1);
html->stack->getRef(n_items)->tag_idx = tag_idx;
html->dw = S_TOP(html)->textblock;
}
/*
* Push the tag (used to force en element with optional open into the stack)
* Note: now it's the same as Html_push_tag(), but things may change...
*/
static void Html_force_push_tag(DilloHtml *html, int tag_idx)
{
html->startElement (tag_idx);
Html_push_tag(html, tag_idx);
}
/*
* Pop the top tag in the stack
*/
static void Html_real_pop_tag(DilloHtml *html)
{
bool hand_over_break;
html->styleEngine->endElement (S_TOP(html)->tag_idx);
hand_over_break = S_TOP(html)->hand_over_break;
html->stack->setSize (html->stack->size() - 1);
Html_eventually_pop_dw(html, hand_over_break);
}
/*
* Cleanup the stack to a given index.
*/
static void Html_tag_cleanup_to_idx(DilloHtml *html, int idx)
{
static int i_BODY = a_Html_tag_index("body");
int s_sz;
while ((s_sz = html->stack->size()) > idx) {
int toptag_idx = S_TOP(html)->tag_idx;
TagInfo toptag = Tags[toptag_idx];
if (s_sz > idx + 1 && toptag.EndTag != 'O')
BUG_MSG(" - forcing close of open tag: <%s>.", toptag.name);
_MSG("Close: %s sz=%d idx=%d\n", toptag.name, s_sz, idx);
if (toptag_idx == i_BODY &&
!((html->InFlags & IN_EOF) || html->ReqTagClose)) {
(idx == 1 ? html->PrevWasHtmlClose : html->PrevWasBodyClose) = true;
break; // only pop {BODY,HTML} upon EOF or redundancy
}
if (toptag.close)
toptag.close(html);
Html_real_pop_tag(html);
}
}
/*
* Default close function for tags.
* (conditional cleanup of the stack)
* There are several ways of doing it. Considering the HTML 4.01 spec
* which defines optional close tags, and the will to deliver useful diagnose
* messages for bad-formed HTML, it'll go as follows:
* 1.- Search the stack for the first tag that requires a close tag.
* 2.- If it matches, clean all the optional-close tags in between.
* 3.- Cleanup the matching tag. (on error, give a warning message)
*
* If 'w3c_mode' is NOT enabled:
* 1.- Search the stack for a matching tag based on tag level.
* 2.- If it exists, clean all the tags in between.
* 3.- Cleanup the matching tag. (on error, give a warning message)
*/
static void Html_tag_cleanup_at_close(DilloHtml *html, int new_idx)
{
static int i_BUTTON = a_Html_tag_index("button"),
i_SELECT = a_Html_tag_index("select"),
i_TEXTAREA = a_Html_tag_index("textarea");
int w3c_mode = !prefs.w3c_plus_heuristics;
int stack_idx, tag_idx, matched = 0, expected = 0;
TagInfo new_tag = Tags[new_idx];
/* Look for the candidate tag to close */
stack_idx = html->stack->size();
while (--stack_idx) {
tag_idx = html->stack->getRef(stack_idx)->tag_idx;
if (tag_idx == new_idx) {
/* matching tag found */
matched = 1;
break;
} else if (Tags[tag_idx].EndTag == 'O') {
/* skip an optional tag */
continue;
} else if ((new_idx == i_BUTTON && html->InFlags & IN_BUTTON) ||
(new_idx == i_SELECT && html->InFlags & IN_SELECT) ||
(new_idx == i_TEXTAREA && html->InFlags & IN_TEXTAREA)) {
/* let these elements close tags inside them */
continue;
} else if (w3c_mode || Tags[tag_idx].TagLevel >= new_tag.TagLevel) {
/* this is the tag that should have been closed */
expected = 1;
break;
}
}
if (matched) {
Html_tag_cleanup_to_idx(html, stack_idx);
} else if (expected) {
BUG_MSG("Unexpected closing tag: -- expected .",
new_tag.name, Tags[tag_idx].name);
} else {
BUG_MSG("Unexpected closing tag: .", new_tag.name);
}
}
/*
* Avoid nesting and inter-nesting of BUTTON, SELECT and TEXTAREA,
* by closing them before opening another.
* This is not an HTML SPEC restriction , but it avoids lots of trouble
* inside dillo (concurrent inputs), and makes almost no sense to have.
*/
static void Html_tag_cleanup_nested_inputs(DilloHtml *html, int new_idx)
{
static int i_BUTTON = a_Html_tag_index("button"),
i_SELECT = a_Html_tag_index("select"),
i_TEXTAREA = a_Html_tag_index("textarea");
int stack_idx, u_idx, matched = 0;
dReturn_if_fail(html->InFlags & (IN_BUTTON | IN_SELECT | IN_TEXTAREA));
dReturn_if_fail(new_idx == i_BUTTON || new_idx == i_SELECT ||
new_idx == i_TEXTAREA);
/* Get the unclosed tag index */
u_idx = (html->InFlags & IN_BUTTON) ? i_BUTTON :
(html->InFlags & IN_SELECT) ? i_SELECT : i_TEXTAREA;
/* Look for it inside the stack */
stack_idx = html->stack->size();
while (--stack_idx) {
if (html->stack->getRef(stack_idx)->tag_idx == u_idx) {
/* matching tag found */
matched = 1;
break;
}
}
if (matched) {
BUG_MSG("Attempt to nest <%s> element inside <%s> -- closing <%s>.",
Tags[new_idx].name, Tags[u_idx].name, Tags[u_idx].name);
Html_tag_cleanup_to_idx(html, stack_idx);
} else {
MSG_WARN("Inconsistent parser state, flag is SET but no '%s' element"
"was found in the stack\n", Tags[u_idx].name);
}
html->InFlags &= ~(IN_BUTTON | IN_SELECT | IN_TEXTAREA);
}
/*
* Some parsing routines.
*/
/*
* Used by a_Html_parse_length
*/
static CssLength Html_parse_length_or_multi_length (const char *attr,
char **endptr)
{
CssLength l;
double v;
char *end;
v = strtod (attr, &end);
switch (*end) {
case '%':
end++;
l = CSS_CREATE_LENGTH (v / 100, CSS_LENGTH_TYPE_PERCENTAGE);
break;
case '*':
end++;
l = CSS_CREATE_LENGTH (v, CSS_LENGTH_TYPE_RELATIVE);
break;
/*
The "px" suffix seems not allowed by HTML4.01 SPEC.
case 'p':
if (end[1] == 'x')
end += 2;
*/
default:
l = CSS_CREATE_LENGTH (v, CSS_LENGTH_TYPE_PX);
break;
}
if (endptr)
*endptr = end;
return l;
}
/*
* Returns a length or a percentage, or UNDEF_LENGTH in case
* of an error, or if attr is NULL.
*/
CssLength a_Html_parse_length (DilloHtml *html, const char *attr)
{
CssLength l;
char *end;
l = Html_parse_length_or_multi_length (attr, &end);
if (CSS_LENGTH_TYPE (l) == CSS_LENGTH_TYPE_RELATIVE)
/* not allowed as &Length; */
l = CSS_CREATE_LENGTH(0.0, CSS_LENGTH_TYPE_AUTO);
else {
/* allow only whitespaces */
if (*end && !isspace (*end)) {
BUG_MSG("Garbage after length: '%s'.", attr);
l = CSS_CREATE_LENGTH(0.0, CSS_LENGTH_TYPE_AUTO);
}
}
_MSG("a_Html_parse_length: \"%s\" %d\n", attr, CSS_LENGTH_VALUE(l));
return l;
}
/*
* Parse a color attribute.
* Return value: parsed color, or default_color (+ error msg) on error.
*/
int32_t a_Html_color_parse(DilloHtml *html, const char *str,
int32_t default_color)
{
int err = 1;
int32_t color = a_Color_parse(str, default_color, &err);
if (err) {
BUG_MSG("Color '%s' is not in \"#RRGGBB\" format.", str);
}
return color;
}
/*
* Check that 'val' is composed of characters inside [A-Za-z0-9:_.-]
* Note: ID can't have entities, but this check is enough (no '&').
* Return value: 1 if OK, 0 otherwise.
*/
static int
Html_check_name_val(DilloHtml *html, const char *val, const char *attrname)
{
if (html->DocType == DT_HTML && html->DocTypeVersion >= 5.0f) {
bool valid = *val && !strchr(val, ' ');
if (!valid) {
BUG_MSG("'%s' value \"%s\" must not be empty and must not contain "
"spaces.", attrname, val);
}
return valid ? 1 : 0;
} else {
int i;
for (i = 0; val[i]; ++i)
if (!isascii(val[i]) || !(isalnum(val[i]) || strchr(":_.-", val[i])))
break;
if (val[i] || !(isascii(val[0]) && isalpha(val[0])))
BUG_MSG("%s attribute value \"%s\" is not of the form "
"'[A-Za-z][A-Za-z0-9:_.-]*'.", attrname, val);
return !(val[i]);
}
}
/*
* Handle DOCTYPE declaration
*
* Follows the convention that HTML 4.01
* doctypes which include a full w3c DTD url are treated as
* standards-compliant, but 4.01 without the url and HTML 4.0 and
* earlier are not. XHTML doctypes are always standards-compliant
* whether or not an url is present.
*
* Note: I'm not sure about this convention. The W3C validator
* recognizes the "HTML Level" with or without the URL. The convention
* comes from mozilla (see URLs below), but Dillo doesn't have the same
* rendering modes, so it may be better to chose another behaviour. --Jcid
*
* http://www.mozilla.org/docs/web-developer/quirks/doctypes.html
* http://lists.dillo.org/pipermail/dillo-dev/2004-October/002300.html
*
* This is not a full DOCTYPE parser, just enough for what Dillo uses.
*/
static void Html_parse_doctype(DilloHtml *html, const char *tag, int tagsize)
{
static const char HTML_SGML_sig [] = "DocType != DT_NONE)
BUG_MSG("Multiple DOCTYPE declarations.");
/* The default DT_NONE type is TagSoup */
if (i > strlen(HTML_SGML_sig) && // avoid out of bounds reads!
!dStrnAsciiCasecmp(ntag, HTML_SGML_sig, strlen(HTML_SGML_sig))) {
p = ntag + strlen(HTML_SGML_sig) + 1;
if (!strncmp(p, HTML401, strlen(HTML401)) &&
dStriAsciiStr(p + strlen(HTML401), HTML401_url)) {
html->DocType = DT_HTML;
html->DocTypeVersion = 4.01f;
} else if (!strncmp(p, XHTML1, strlen(XHTML1)) &&
dStriAsciiStr(p + strlen(XHTML1), XHTML1_url)) {
html->DocType = DT_XHTML;
html->DocTypeVersion = 1.0f;
} else if (!strncmp(p, XHTML11, strlen(XHTML11)) &&
dStriAsciiStr(p + strlen(XHTML11), XHTML11_url)) {
html->DocType = DT_XHTML;
html->DocTypeVersion = 1.1f;
} else if (!strncmp(p, HTML40, strlen(HTML40))) {
html->DocType = DT_HTML;
html->DocTypeVersion = 4.0f;
} else if (!strncmp(p, HTML32, strlen(HTML32))) {
html->DocType = DT_HTML;
html->DocTypeVersion = 3.2f;
} else if (!strncmp(p, HTML20, strlen(HTML20))) {
html->DocType = DT_HTML;
html->DocTypeVersion = 2.0f;
}
} else if (!dStrAsciiCasecmp(ntag, "") ||
!dStrAsciiCasecmp(ntag, "") ||
!dStrAsciiCasecmp(ntag,
"") ||
!dStrAsciiCasecmp(ntag,
"")) {
html->DocType = DT_HTML;
html->DocTypeVersion = 5.0f;
}
if (html->DocType == DT_NONE) {
html->DocType = DT_UNRECOGNIZED;
BUG_MSG("DOCTYPE not recognized: ('%s').", ntag);
}
dFree(ntag);
}
/*
* Handle open HTML element
*/
static void Html_tag_open_html(DilloHtml *html, const char *tag, int tagsize)
{
/* The IN_HTML flag will be kept set until at IN_EOF condition.
* This allows to handle pages with multiple or uneven HTML tags */
if (!(html->InFlags & IN_HTML))
html->InFlags |= IN_HTML;
if (html->Num_HTML < UCHAR_MAX)
++html->Num_HTML;
if (html->Num_HTML > 1) {
BUG_MSG(" was already open.");
html->ReqTagClose = true;
}
}
/*
* Handle close HTML element
*/
static void Html_tag_close_html(DilloHtml *html)
{
_MSG("Html_tag_close_html: Num_HTML=%d\n", html->Num_HTML);
/* As some Tag soup pages use multiple HTML tags, this function
* gets called only on EOF and upon and extra HTML open.
* Also, we defer clearing the IN_HTML flag until IN_EOF */
}
/*
* Handle open HEAD element
*/
static void Html_tag_open_head(DilloHtml *html, const char *tag, int tagsize)
{
if (html->InFlags & IN_BODY) {
BUG_MSG(" must go before the BODY section.");
html->ReqTagClose = true;
return;
}
if (html->Num_HEAD < UCHAR_MAX)
++html->Num_HEAD;
if (html->InFlags & IN_HEAD) {
BUG_MSG(" was already open.");
html->ReqTagClose = true;
} else if (html->Num_HEAD > 1) {
BUG_MSG(" already finished -- ignoring.");
html->ReqTagClose = true;
} else {
html->InFlags |= IN_HEAD;
}
}
/*
* Handle close HEAD element
* Note: HEAD is parsed once completely got.
*/
static void Html_tag_close_head(DilloHtml *html)
{
if (html->InFlags & IN_HEAD) {
if (html->Num_HEAD == 1) {
/* match for the well formed start of HEAD section */
if (html->Num_TITLE == 0)
BUG_MSG(" lacks .");
html->InFlags &= ~IN_HEAD;
/* charset is already set, load remote stylesheets now */
for (int i = 0; i < html->cssUrls->size(); i++) {
a_Html_load_stylesheet(html, html->cssUrls->get(i));
}
} else if (html->Num_HEAD > 1) {
--html->Num_HEAD;
}
} else {
/* not reached, see Html_tag_cleanup_at_close() */
}
}
/*
* Handle open TITLE
* calls stash init, where the title string will be stored
*/
static void Html_tag_open_title(DilloHtml *html, const char *tag, int tagsize)
{
/* fill the stash buffer so TITLE content can be ignored
* when not valid, redundant or outside HEAD section */
a_Html_stash_init(html);
if (html->InFlags & IN_HEAD) {
if (html->Num_TITLE < UCHAR_MAX)
++html->Num_TITLE;
if (html->Num_TITLE > 1)
BUG_MSG("Redundant <title>.");
} else {
BUG_MSG("<title> must be inside <head> -- ignoring.");
}
}
/*
* Handle close TITLE
* set page-title in the browser window and in the history.
*/
static void Html_tag_close_title(DilloHtml *html)
{
if (html->InFlags & IN_HEAD && html->Num_TITLE == 1) {
/* title is only valid inside HEAD */
a_UIcmd_set_page_title(html->bw, html->Stash->str);
a_History_set_title_by_url(html->page_url, html->Stash->str);
}
}
/*
* Handle open SCRIPT
* initializes stash, where the embedded code will be stored.
* MODE_VERBATIM is used because MODE_STASH catches entities.
*/
static void Html_tag_open_script(DilloHtml *html, const char *tag, int tagsize)
{
a_Html_stash_init(html);
S_TOP(html)->parse_mode = DILLO_HTML_PARSE_MODE_VERBATIM;
}
/*
* Handle close SCRIPT
*/
static void Html_tag_close_script(DilloHtml *html)
{
/* eventually the stash will be sent to an interpreter for parsing */
}
/*
* Handle open STYLE
* Store contents in the stash where the style sheet interpreter can get it.
*/
static void Html_tag_open_style(DilloHtml *html, const char *tag, int tagsize)
{
const char *attrbuf;
html->loadCssFromStash = true;
if (!(attrbuf = a_Html_get_attr(html, tag, tagsize, "type"))) {
if (html->DocType != DT_HTML || html->DocTypeVersion <= 4.01f)
BUG_MSG("<style> requires type attribute.");
} else if (dStrAsciiCasecmp(attrbuf, "text/css")) {
html->loadCssFromStash = false;
}
if ((attrbuf = a_Html_get_attr(html, tag, tagsize, "media")) &&
dStrAsciiCasecmp(attrbuf, "all") && !dStriAsciiStr(attrbuf, "screen")) {
/* HTML 4.01 sec. 6.13 says that media descriptors are case-sensitive,
* but sec. 14.2.3 says that the attribute is case-insensitive.
* TODO can be a comma-separated list.
* TODO handheld.
*/
html->loadCssFromStash = false;
}
a_Html_stash_init(html);
S_TOP(html)->parse_mode = DILLO_HTML_PARSE_MODE_VERBATIM;
}
/*
* Handle close STYLE
*/
static void Html_tag_close_style(DilloHtml *html)
{
if (prefs.parse_embedded_css && html->loadCssFromStash)
html->styleEngine->parse(html, html->base_url, html->Stash->str,
html->Stash->len, CSS_ORIGIN_AUTHOR);
}
/*
* <BODY>
*/
static void Html_tag_open_body(DilloHtml *html, const char *tag, int tagsize)
{
const char *attrbuf;
int32_t color;
int tag_index_a = a_Html_tag_index ("a");
style::Color *bgColor;
style::StyleImage *bgImage;
style::BackgroundRepeat bgRepeat;
style::BackgroundAttachment bgAttachment;
style::Length bgPositionX, bgPositionY;
_MSG("Html_tag_open_body Num_BODY=%d\n", html->Num_BODY);
if (!(html->InFlags & IN_BODY))
html->InFlags |= IN_BODY;
if (html->Num_BODY < UCHAR_MAX)
++html->Num_BODY;
if (html->Num_BODY > 1) {
BUG_MSG("<body> was already open.");
html->ReqTagClose = true;
return;
}
if (html->InFlags & IN_HEAD) {
/* if we're here, it's bad XHTML, no need to recover */
BUG_MSG("Unclosed <head>.");
}
if ((attrbuf = a_Html_get_attr(html, tag, tagsize, "bgcolor"))) {
color = a_Html_color_parse(html, attrbuf, -1);
if (html->DocType == DT_HTML && html->DocTypeVersion >= 5.0f)
BUG_MSG("<body> bgcolor attribute is obsolete.");
if (color != -1)
html->styleEngine->setNonCssHint (CSS_PROPERTY_BACKGROUND_COLOR,
CSS_TYPE_COLOR, color);
}
if ((attrbuf = a_Html_get_attr(html, tag, tagsize, "text"))) {
color = a_Html_color_parse(html, attrbuf, -1);
if (html->DocType == DT_HTML && html->DocTypeVersion >= 5.0f)
BUG_MSG("<body> text attribute is obsolete.");
if (color != -1)
html->styleEngine->setNonCssHint (CSS_PROPERTY_COLOR,
CSS_TYPE_COLOR, color);
}
html->restyle ();
if ((attrbuf = a_Html_get_attr(html, tag, tagsize, "link"))) {
html->non_css_link_color = a_Html_color_parse(html, attrbuf, -1);
if (html->DocType == DT_HTML && html->DocTypeVersion >= 5.0f)
BUG_MSG("<body> link attribute is obsolete.");
}
if ((attrbuf = a_Html_get_attr(html, tag, tagsize, "vlink"))) {
html->non_css_visited_color = a_Html_color_parse(html, attrbuf, -1);
if (html->DocType == DT_HTML && html->DocTypeVersion >= 5.0f)
BUG_MSG("<body> vlink attribute is obsolete.");
}
html->dw->setStyle (html->style ());
bgColor = html->styleEngine->backgroundColor ();
if (bgColor)
HT2LT(html)->setBgColor(bgColor);
bgImage = html->styleEngine->backgroundImage (&bgRepeat, &bgAttachment,
&bgPositionX, &bgPositionY);
if (bgImage)
HT2LT(html)->setBgImage(bgImage, bgRepeat, bgAttachment, bgPositionX,
bgPositionY);
/* Determine a color for visited links.
* This color is computed once per page and used for immediate feedback
* when clicking a link.
* On reload style including color for visited links is computed properly
* according to CSS.
*/
html->startElement (tag_index_a);
html->styleEngine->setPseudoVisited ();
if (html->non_css_visited_color != -1) {
html->styleEngine->setNonCssHint (CSS_PROPERTY_COLOR, CSS_TYPE_COLOR,
html->non_css_visited_color);
}
html->visited_color = html->style ()->color->getColor ();
html->styleEngine->endElement (tag_index_a);
if (prefs.contrast_visited_color) {
/* get a color that has a "safe distance" from text, link and bg */
html->visited_color =
a_Color_vc(html->visited_color,
html->style ()->color->getColor(),
html->non_css_link_color,
html->backgroundStyle()->backgroundColor->getColor());
}
S_TOP(html)->parse_mode = DILLO_HTML_PARSE_MODE_BODY;
}
/*
* BODY
*/
static void Html_tag_close_body(DilloHtml *html)
{
_MSG("Html_tag_close_body: Num_BODY=%d\n", html->Num_BODY);
/* As some Tag soup pages use multiple BODY tags, this function
* gets called only on EOF and upon and extra BODY open.
* Also, we defer clearing the IN_BODY flag until IN_EOF */
}
/*
* <P>
* TODO: what's the point between adding the parbreak before and
* after the push?
*/
static void Html_tag_open_p(DilloHtml *html, const char *tag, int tagsize)
{
CssPropertyList props;
a_Html_tag_set_align_attr (html, tag, tagsize);
}
/*
* <FRAME>, <IFRAME>
* TODO: This is just a temporary fix while real frame support
* isn't finished. Imitates lynx/w3m's frames.
*/
static void Html_tag_open_frame (DilloHtml *html, const char *tag, int tagsize)
{
const char *attrbuf;
DilloUrl *url;
CssPropertyList props;
if (!(attrbuf = a_Html_get_attr(html, tag, tagsize, "src")))
return;
if (!(url = a_Html_url_new(html, attrbuf, NULL, 0)))
return;
if (a_Capi_get_flags_with_redirection(url) & CAPI_IsCached) {
/* visited frame */
html->styleEngine->setPseudoVisited ();
} else {
/* unvisited frame */
html->styleEngine->setPseudoLink ();
}
html->styleEngine->setNonCssHint (PROPERTY_X_LINK, CSS_TYPE_INTEGER,
Html_set_new_link(html,&url));
}
static void
Html_tag_content_frame (DilloHtml *html, const char *tag, int tagsize)
{
const char *attrbuf;
char *src;
Textblock *textblock;
Widget *bullet;
textblock = HT2TB(html);
if (!(attrbuf = a_Html_get_attr(html, tag, tagsize, "src")))
return;
src = dStrdup(attrbuf);
textblock->addParbreak (5, html->wordStyle ());
bullet = new Bullet();
textblock->addWidget(bullet, html->wordStyle ());
textblock->addSpace(html->wordStyle ());
if (D_ASCII_TOLOWER(tag[1]) == 'i') {
/* IFRAME usually comes with very long advertising/spying URLS,
* to not break rendering we will force name="IFRAME" */
textblock->addText ("IFRAME", html->wordStyle ());
} else {
/* FRAME:
* If 'name' tag is present use it, if not use 'src' value */
if (!(attrbuf = a_Html_get_attr(html, tag, tagsize, "name"))) {
textblock->addText (src, html->wordStyle ());
} else {
textblock->addText (attrbuf, html->wordStyle ());
}
}
textblock->addParbreak (5, html->wordStyle ());
dFree(src);
}
/*
* <FRAMESET>
* TODO: This is just a temporary fix while real frame support
* isn't finished. Imitates lynx/w3m's frames.
*/
static void Html_tag_content_frameset (DilloHtml *html,
const char *tag, int tagsize)
{
HT2TB(html)->addParbreak (9, html->wordStyle ());
HT2TB(html)->addText("--FRAME--", html->wordStyle ());
Html_add_textblock(html, true, 5, false);
}
/*
* <H1> | <H2> | <H3> | <H4> | <H5> | <H6>
*/
static void Html_tag_open_h(DilloHtml *html, const char *tag, int tagsize)
{
a_Html_tag_set_align_attr (html, tag, tagsize);
a_Html_stash_init(html);
S_TOP(html)->parse_mode =
DILLO_HTML_PARSE_MODE_STASH_AND_BODY;
}
/*
* <BR>
*/
static void Html_tag_content_br(DilloHtml *html, const char *tag, int tagsize)
{
HT2TB(html)->addLinebreak (html->wordStyle ());
}
/*
* <FONT>
*/
static void Html_tag_open_font(DilloHtml *html, const char *tag, int tagsize)
{
const char *attrbuf;
char *fontFamily = NULL;
int32_t color;
if ((attrbuf = a_Html_get_attr(html, tag, tagsize, "color"))) {
if (prefs.contrast_visited_color && html->InVisitedLink) {
color = html->visited_color;
} else {
/* use the tag-specified color */
color = a_Html_color_parse(html, attrbuf, -1);
}
if (color != -1)
html->styleEngine->setNonCssHint (CSS_PROPERTY_COLOR,
CSS_TYPE_COLOR, color);
}
if ((attrbuf = a_Html_get_attr(html, tag, tagsize, "face"))) {
fontFamily = dStrdup(attrbuf);
html->styleEngine->setNonCssHint (CSS_PROPERTY_FONT_FAMILY,
CSS_TYPE_SYMBOL, fontFamily);
}
dFree(fontFamily);
}
/*
* <ABBR>
*/
static void Html_tag_open_abbr(DilloHtml *html, const char *tag, int tagsize)
{
const char *attrbuf;
html->styleEngine->inheritBackgroundColor ();
if (prefs.show_tooltip &&
(attrbuf = a_Html_get_attr(html, tag, tagsize, "title"))) {
html->styleEngine->setNonCssHint (PROPERTY_X_TOOLTIP, CSS_TYPE_STRING,
attrbuf);
}
}
/*
* Read image-associated tag attributes and create new image.
*/
void a_Html_common_image_attrs(DilloHtml *html, const char *tag, int tagsize)
{
char *width_ptr, *height_ptr;
const char *attrbuf;
CssLength l_w = CSS_CREATE_LENGTH(0.0, CSS_LENGTH_TYPE_AUTO);
CssLength l_h = CSS_CREATE_LENGTH(0.0, CSS_LENGTH_TYPE_AUTO);
int w = 0, h = 0;
if (prefs.show_tooltip &&
(attrbuf = a_Html_get_attr(html, tag, tagsize, "title"))) {
html->styleEngine->setNonCssHint(PROPERTY_X_TOOLTIP, CSS_TYPE_STRING,
attrbuf);
}
width_ptr = a_Html_get_attr_wdef(html, tag, tagsize, "width", NULL);
height_ptr = a_Html_get_attr_wdef(html, tag, tagsize, "height", NULL);
// Check for malicious values
// TODO: the same for percentage and relative lengths.
if (width_ptr) {
l_w = a_Html_parse_length (html, width_ptr);
w = (int) (CSS_LENGTH_TYPE(l_w) == CSS_LENGTH_TYPE_PX ?
CSS_LENGTH_VALUE(l_w) : 0);
}
if (height_ptr) {
l_h = a_Html_parse_length (html, height_ptr);
h = (int) (CSS_LENGTH_TYPE(l_h) == CSS_LENGTH_TYPE_PX ?
CSS_LENGTH_VALUE(l_h) : 0);
}
/* Check for suspicious image size request that would cause
* an excessive amount of memory to be allocated for the
* image buffer.
* Be careful to avoid integer overflows during the checks.
* There is an additional check in dw/image.cc to catch cases
* where only one dimension is given and the image is scaled
* preserving its original aspect ratio.
* Size requests passed via CSS are also checked there.
*/
if (w < 0 || h < 0 ||
w > IMAGE_MAX_AREA || h > IMAGE_MAX_AREA ||
(h > 0 && w > IMAGE_MAX_AREA / h)) {
dFree(width_ptr);
dFree(height_ptr);
width_ptr = height_ptr = NULL;
MSG("a_Html_common_image_attrs: suspicious image size request %d x %d\n",
w, h);
} else {
if (CSS_LENGTH_TYPE(l_w) != CSS_LENGTH_TYPE_AUTO)
html->styleEngine->setNonCssHint (CSS_PROPERTY_WIDTH,
CSS_TYPE_LENGTH_PERCENTAGE, l_w);
if (CSS_LENGTH_TYPE(l_h) != CSS_LENGTH_TYPE_AUTO)
html->styleEngine->setNonCssHint (CSS_PROPERTY_HEIGHT,
CSS_TYPE_LENGTH_PERCENTAGE, l_h);
}
/* TODO: we should scale the image respecting its ratio.
* As the image size is not known at this time, maybe a flag
* can be set to scale it later.
if ((width_ptr && !height_ptr) || (height_ptr && !width_ptr))
[...]
*/
/* x_img is an index to a list of {url,image} pairs.
* We know a_Html_image_new() will use size() as its next index */
html->styleEngine->setNonCssHint (PROPERTY_X_IMG, CSS_TYPE_INTEGER,
html->images->size());
dFree(width_ptr);
dFree(height_ptr);
}
DilloImage *a_Html_image_new(DilloHtml *html, const char *tag, int tagsize)
{
bool load_now;
char *alt_ptr;
const char *attrbuf;
DilloUrl *url;
DilloImage *image;
if (!(attrbuf = a_Html_get_attr(html, tag, tagsize, "src")) ||
!(url = a_Html_url_new(html, attrbuf, NULL, 0)))
return NULL;
alt_ptr = a_Html_get_attr_wdef(html, tag, tagsize, "alt", NULL);
if (!alt_ptr || !*alt_ptr) {
dFree(alt_ptr);
alt_ptr = dStrdup("[IMG]");
}
dw::Image *dw = new dw::Image(alt_ptr);
image =
a_Image_new(html->dw->getLayout(), (void*)(dw::core::ImgRenderer*)dw, 0);
a_Image_ref(image);
if (HT2TB(html)->getBgColor())
image->bg_color = HT2TB(html)->getBgColor()->getColor();
DilloHtmlImage *hi = dNew(DilloHtmlImage, 1);
hi->url = url;
html->images->increase();
html->images->set(html->images->size() - 1, hi);
load_now = prefs.load_images ||
!dStrAsciiCasecmp(URL_SCHEME(url), "data") ||
(a_Capi_get_flags_with_redirection(url) & CAPI_IsCached);
if (load_now && Html_load_image(html->bw, url, html->page_url, image)) {
// hi->image is NULL if dillo tries to load the image immediately
hi->image = NULL;
a_Image_unref(image);
} else {
// otherwise a reference is kept in html->images
hi->image = image;
}
dFree(alt_ptr);
return image;
}
/*
* Tell cache to retrieve image
*/
static bool Html_load_image(BrowserWindow *bw, DilloUrl *url,
const DilloUrl *requester, DilloImage *Image)
{
DilloWeb *Web;
int ClientKey;
/* Fill a Web structure for the cache query */
Web = a_Web_new(bw, url, requester);
Web->Image = Image;
a_Image_ref(Image);
Web->flags |= WEB_Image;
/* Request image data from the cache */
if ((ClientKey = a_Capi_open_url(Web, NULL, NULL)) != 0) {
a_Bw_add_client(bw, ClientKey, 0);
a_Bw_add_url(bw, url);
}
return ClientKey != 0;
}
static void Html_tag_open_img(DilloHtml *html, const char *tag, int tagsize)
{
int space, border;
const char *attrbuf;
a_Html_common_image_attrs(html, tag, tagsize);
/* Spacing to the left and right */
if ((attrbuf = a_Html_get_attr(html, tag, tagsize, "hspace"))) {
space = strtol(attrbuf, NULL, 10);
if (space > 0) {
space = CSS_CREATE_LENGTH(space, CSS_LENGTH_TYPE_PX);
html->styleEngine->setNonCssHint (CSS_PROPERTY_MARGIN_LEFT,
CSS_TYPE_LENGTH_PERCENTAGE, space);
html->styleEngine->setNonCssHint (CSS_PROPERTY_MARGIN_RIGHT,
CSS_TYPE_LENGTH_PERCENTAGE, space);
}
}
/* Spacing at the top and bottom */
if ((attrbuf = a_Html_get_attr(html, tag, tagsize, "vspace"))) {
space = strtol(attrbuf, NULL, 10);
if (space > 0) {
space = CSS_CREATE_LENGTH(space, CSS_LENGTH_TYPE_PX);
html->styleEngine->setNonCssHint (CSS_PROPERTY_MARGIN_TOP,
CSS_TYPE_LENGTH_PERCENTAGE, space);
html->styleEngine->setNonCssHint (CSS_PROPERTY_MARGIN_BOTTOM,
CSS_TYPE_LENGTH_PERCENTAGE, space);
}
}
/* Border */
if ((attrbuf = a_Html_get_attr(html, tag, tagsize, "border"))) {
border = strtol(attrbuf, NULL, 10);
if (border >= 0) {
border = CSS_CREATE_LENGTH(border, CSS_LENGTH_TYPE_PX);
html->styleEngine->setNonCssHint (CSS_PROPERTY_BORDER_TOP_WIDTH,
CSS_TYPE_LENGTH_PERCENTAGE, border);
html->styleEngine->setNonCssHint (CSS_PROPERTY_BORDER_BOTTOM_WIDTH,
CSS_TYPE_LENGTH_PERCENTAGE, border);
html->styleEngine->setNonCssHint (CSS_PROPERTY_BORDER_LEFT_WIDTH,
CSS_TYPE_LENGTH_PERCENTAGE, border);
html->styleEngine->setNonCssHint (CSS_PROPERTY_BORDER_RIGHT_WIDTH,
CSS_TYPE_LENGTH_PERCENTAGE, border);
html->styleEngine->setNonCssHint (CSS_PROPERTY_BORDER_TOP_STYLE,
CSS_TYPE_ENUM, BORDER_SOLID);
html->styleEngine->setNonCssHint (CSS_PROPERTY_BORDER_BOTTOM_STYLE,
CSS_TYPE_ENUM, BORDER_SOLID);
html->styleEngine->setNonCssHint (CSS_PROPERTY_BORDER_LEFT_STYLE,
CSS_TYPE_ENUM, BORDER_SOLID);
html->styleEngine->setNonCssHint (CSS_PROPERTY_BORDER_RIGHT_STYLE,
CSS_TYPE_ENUM, BORDER_SOLID);
}
}
}
/*
* Create a new Image struct and request the image-url to the cache
* (If it either hits or misses, is not relevant here; that's up to the
* cache functions)
*/
static void Html_tag_content_img(DilloHtml *html, const char *tag, int tagsize)
{
DilloImage *Image;
DilloUrl *usemap_url;
const char *attrbuf;
/* This avoids loading images. Useful for viewing suspicious HTML email. */
if (URL_FLAGS(html->base_url) & URL_SpamSafe)
return;
Image = a_Html_image_new(html, tag, tagsize);
if (!Image)
return;
usemap_url = NULL;
if ((attrbuf = a_Html_get_attr(html, tag, tagsize, "usemap")))
/* TODO: usemap URLs outside of the document are not used. */
usemap_url = a_Html_url_new(html, attrbuf, NULL, 0);
// At this point, we know that Image->ir represents an image
// widget. Notice that the order of the casts matters, because of
// multiple inheritance.
dw::Image *dwi = (dw::Image*)(dw::core::ImgRenderer*)Image->img_rndr;
HT2TB(html)->addWidget(dwi, html->style());
HT2TB(html)->addBreakOption (html->style (), false);
/* Image maps */
if (a_Html_get_attr(html, tag, tagsize, "ismap")) {
dwi->setIsMap();
_MSG(" Html_tag_open_img: server-side map (ISMAP)\n");
} else if (html->style ()->x_link != -1 &&
usemap_url == NULL) {
/* For simple links, we have to suppress the "image_pressed" signal.
* This is overridden for USEMAP images. */
// a_Dw_widget_set_button_sensitive (IM2DW(Image->dw), FALSE);
}
if (usemap_url) {
dwi->setUseMap(&html->maps, new ::object::String(URL_STR(usemap_url)));
a_Url_free (usemap_url);
}
}
/*
* <map>
*/
static void Html_tag_content_map(DilloHtml *html, const char *tag, int tagsize)
{
char *hash_name;
const char *attrbuf;
DilloUrl *url;
if (html->InFlags & IN_MAP) {
BUG_MSG("Nested <map>.");
} else {
if ((attrbuf = a_Html_get_attr(html, tag, tagsize, "name"))) {
html->InFlags |= IN_MAP;
hash_name = dStrconcat("#", attrbuf, NULL);
url = a_Html_url_new(html, hash_name, NULL, 0);
html->maps.startNewMap(new ::object::String(URL_STR(url)));
a_Url_free (url);
dFree(hash_name);
} else {
BUG_MSG("<map> requires name attribute.");
}
}
}
/*
* Handle close <MAP>
*/
static void Html_tag_close_map(DilloHtml *html)
{
/* This is a hack for the perhaps frivolous feature of drawing image map
* shapes when there is no image to display. If this map is defined after
* an image that has not been loaded (img != NULL), tell the image to
* redraw. (It will only do so if it uses a map.)
*/
for (int i = 0; i < html->images->size(); i++) {
DilloImage *img = html->images->get(i)->image;
if (img) {
// At this point, we know that img->ir represents an image
// widget. (Really? Is this assumtion safe?) Notice that the
// order of the casts matters, because of multiple
// inheritance.
dw::Image *dwi = (dw::Image*)(dw::core::ImgRenderer*)img->img_rndr;
dwi->forceMapRedraw();
}
}
html->InFlags &= ~IN_MAP;
}
/*
* Read coords in a string, returning a vector of ints.
*/
static
misc::SimpleVector<int> *Html_read_coords(DilloHtml *html, const char *str)
{
int coord;
const char *tail = str;
char *newtail = NULL;
misc::SimpleVector<int> *coords = new misc::SimpleVector<int> (4);
while (1) {
coord = strtol(tail, &newtail, 10);
if (coord == 0 && newtail == tail)
break;
coords->increase();
coords->set(coords->size() - 1, coord);
while (isspace(*newtail))
newtail++;
if (!*newtail)
break;
if (*newtail != ',') {
BUG_MSG("<area> coords must be integers separated by commas.");
}
tail = newtail + 1;
}
return coords;
}
/*
* <AREA>
*/
static void
Html_tag_content_area(DilloHtml *html, const char *tag, int tagsize)
{
enum types {UNKNOWN, RECTANGLE, CIRCLE, POLYGON, BACKGROUND};
types type;
misc::SimpleVector<int> *coords = NULL;
DilloUrl* url;
const char *attrbuf;
int link = -1;
Shape *shape = NULL;
if (!(html->InFlags & IN_MAP)) {
BUG_MSG("<area> not inside <map>.");
return;
}
attrbuf = a_Html_get_attr(html, tag, tagsize, "shape");
if (!attrbuf || !*attrbuf || !dStrAsciiCasecmp(attrbuf, "rect")) {
/* the default shape is a rectangle */
type = RECTANGLE;
} else if (dStrAsciiCasecmp(attrbuf, "default") == 0) {
/* "default" is the background */
type = BACKGROUND;
} else if (dStrAsciiCasecmp(attrbuf, "circle") == 0) {
type = CIRCLE;
} else if (dStrnAsciiCasecmp(attrbuf, "poly", 4) == 0) {
type = POLYGON;
} else {
BUG_MSG("<area> unknown shape: '%s'.", attrbuf);
type = UNKNOWN;
}
if (type == RECTANGLE || type == CIRCLE || type == POLYGON) {
if ((attrbuf = a_Html_get_attr(html, tag, tagsize, "coords"))) {
coords = Html_read_coords(html, attrbuf);
if (type == RECTANGLE) {
if (coords->size() != 4)
BUG_MSG("<area> rectangle must have four coordinate values.");
if (coords->size() >= 4)
shape = new Rectangle(coords->get(0),
coords->get(1),
coords->get(2) - coords->get(0),
coords->get(3) - coords->get(1));
} else if (type == CIRCLE) {
if (coords->size() != 3)
BUG_MSG("<area> circle must have three coordinate values.");
if (coords->size() >= 3)
shape = new Circle(coords->get(0), coords->get(1),
coords->get(2));
} else if (type == POLYGON) {
Polygon *poly;
int i;
if (coords->size() % 2)
BUG_MSG("<area> polygon with odd number of coordinates.");
shape = poly = new Polygon();
for (i = 0; i < (coords->size() / 2); i++)
poly->addPoint(coords->get(2*i), coords->get(2*i + 1));
}
delete(coords);
}
}
if (shape != NULL || type == BACKGROUND) {
if ((attrbuf = a_Html_get_attr(html, tag, tagsize, "href"))) {
url = a_Html_url_new(html, attrbuf, NULL, 0);
dReturn_if_fail ( url != NULL );
link = Html_set_new_link(html, &url);
}
if (type == BACKGROUND)
html->maps.setCurrentMapDefaultLink(link);
else
html->maps.addShapeToCurrentMap(shape, link);
}
}
/*
* <OBJECT>
* Simply provide a link if the object is something downloadable.
*/
static void Html_tag_open_object(DilloHtml *html, const char *tag, int tagsize)
{
DilloUrl *url, *base_url = NULL;
const char *attrbuf;
if ((attrbuf = a_Html_get_attr(html, tag, tagsize, "codebase"))) {
base_url = a_Html_url_new(html, attrbuf, NULL, 0);
}
if ((attrbuf = a_Html_get_attr(html, tag, tagsize, "data"))) {
url = a_Html_url_new(html, attrbuf,
URL_STR(base_url), (base_url != NULL));
dReturn_if_fail ( url != NULL );
if (a_Capi_get_flags_with_redirection(url) & CAPI_IsCached) {
html->styleEngine->setPseudoVisited ();
} else {
html->styleEngine->setPseudoLink ();
}
html->styleEngine->setNonCssHint(PROPERTY_X_LINK, CSS_TYPE_INTEGER,
Html_set_new_link(html, &url));
}
a_Url_free(base_url);
}
static void Html_tag_content_object(DilloHtml *html, const char *tag,
int tagsize)
{
if (a_Html_get_attr(html, tag, tagsize, "data"))
HT2TB(html)->addText("[OBJECT]", html->wordStyle ());
}
/*
* <VIDEO>
* Provide a link to the video.
*/
static void Html_tag_open_video(DilloHtml *html, const char *tag, int tagsize)
{
DilloUrl *url;
const char *attrbuf;
if (html->InFlags & IN_MEDIA) {
MSG("<video> not handled when already inside a media element.\n");
return;
}
/* TODO: poster attr */
if ((attrbuf = a_Html_get_attr(html, tag, tagsize, "src"))) {
url = a_Html_url_new(html, attrbuf, NULL, 0);
dReturn_if_fail ( url != NULL );
if (a_Capi_get_flags_with_redirection(url) & CAPI_IsCached) {
html->styleEngine->setPseudoVisited ();
} else {
html->styleEngine->setPseudoLink ();
}
html->styleEngine->setNonCssHint(PROPERTY_X_LINK, CSS_TYPE_INTEGER,
Html_set_new_link(html, &url));
HT2TB(html)->addText("[VIDEO]", html->wordStyle ());
}
html->InFlags |= IN_MEDIA;
}
/*
* <AUDIO>
* Provide a link to the audio.
*/
static void Html_tag_open_audio(DilloHtml *html, const char *tag, int tagsize)
{
DilloUrl *url;
const char *attrbuf;
if (html->InFlags & IN_MEDIA) {
MSG("<audio> not handled when already inside a media element.\n");
return;
}
if ((attrbuf = a_Html_get_attr(html, tag, tagsize, "src"))) {
url = a_Html_url_new(html, attrbuf, NULL, 0);
dReturn_if_fail ( url != NULL );
if (a_Capi_get_flags_with_redirection(url) & CAPI_IsCached) {
html->styleEngine->setPseudoVisited ();
} else {
html->styleEngine->setPseudoLink ();
}
html->styleEngine->setNonCssHint(PROPERTY_X_LINK, CSS_TYPE_INTEGER,
Html_set_new_link(html, &url));
HT2TB(html)->addText("[AUDIO]", html->wordStyle ());
}
html->InFlags |= IN_MEDIA;
}
/*
* <SOURCE>
* Media resource; provide a link to its address.
*/
static void Html_tag_open_source(DilloHtml *html, const char *tag,
int tagsize)
{
const char *attrbuf;
if (!(html->InFlags & IN_MEDIA)) {
BUG_MSG("<source> not inside a media element.");
return;
}
if (!(attrbuf = a_Html_get_attr(html, tag, tagsize, "src"))) {
BUG_MSG("<source> requires src attribute.");
return;
} else {
DilloUrl *url = a_Html_url_new(html, attrbuf, NULL, 0);
dReturn_if_fail ( url != NULL );
if (a_Capi_get_flags_with_redirection(url) & CAPI_IsCached) {
html->styleEngine->setPseudoVisited ();
} else {
html->styleEngine->setPseudoLink ();
}
html->styleEngine->setNonCssHint(PROPERTY_X_LINK, CSS_TYPE_INTEGER,
Html_set_new_link(html, &url));
}
}
static void Html_tag_content_source(DilloHtml *html, const char *tag,
int tagsize)
{
if ((html->InFlags & IN_MEDIA) && a_Html_get_attr(html, tag, tagsize,"src"))
HT2TB(html)->addText("[MEDIA SOURCE]", html->wordStyle ());
}
/*
* Media (AUDIO/VIDEO) close function
*/
static void Html_tag_close_media(DilloHtml *html)
{
html->InFlags &= ~IN_MEDIA;
}
/*
* <EMBED>
* Provide a link to embedded content.
*/
static void Html_tag_open_embed(DilloHtml *html, const char *tag, int tagsize)
{
const char *attrbuf;
if ((attrbuf = a_Html_get_attr(html, tag, tagsize, "src"))) {
DilloUrl *url = a_Html_url_new(html, attrbuf, NULL, 0);
dReturn_if_fail ( url != NULL );
if (a_Capi_get_flags_with_redirection(url) & CAPI_IsCached) {
html->styleEngine->setPseudoVisited ();
} else {
html->styleEngine->setPseudoLink ();
}
html->styleEngine->setNonCssHint(PROPERTY_X_LINK, CSS_TYPE_INTEGER,
Html_set_new_link(html, &url));
}
}
static void Html_tag_content_embed(DilloHtml *html,const char *tag,int tagsize)
{
if (a_Html_get_attr(html, tag, tagsize, "src"))
HT2TB(html)->addText("[EMBED]", html->wordStyle ());
}
/*
* Test and extract the link from a javascript instruction.
*/
static const char* Html_get_javascript_link(DilloHtml *html)
{
size_t i;
char ch, *p1, *p2;
Dstr *Buf = html->attr_data;
if (dStrnAsciiCasecmp("javascript", Buf->str, 10) == 0) {
i = strcspn(Buf->str, "'\"");
ch = Buf->str[i];
if ((ch == '"' || ch == '\'') &&
(p2 = strchr(Buf->str + i + 1 , ch))) {
p1 = Buf->str + i;
BUG_MSG("Link depends on javascript().");
dStr_truncate(Buf, p2 - Buf->str);
dStr_erase(Buf, 0, p1 - Buf->str + 1);
}
}
return Buf->str;
}
/*
* Register an anchor for this page.
*/
static void Html_add_anchor(DilloHtml *html, const char *name)
{
_MSG("Registering ANCHOR: %s\n", name);
if (!HT2TB(html)->addAnchor (name, html->style ()))
BUG_MSG("Anchor names must be unique within the document (\"%s\").",
name);
/*
* According to Sec. 12.2.1 of the HTML 4.01 spec, "anchor names that
* differ only in case may not appear in the same document", but
* "comparisons between fragment identifiers and anchor names must be
* done by exact (case-sensitive) match." We ignore the case issue and
* always test for exact matches. Moreover, what does uppercase mean
* for Unicode characters outside the ASCII range?
*/
}
/*
* <A>
*/
static void Html_tag_open_a(DilloHtml *html, const char *tag, int tagsize)
{
DilloUrl *url;
const char *attrbuf;
/* TODO: add support for MAP with A HREF */
if (html->InFlags & IN_MAP)
Html_tag_content_area(html, tag, tagsize);
if ((attrbuf = a_Html_get_attr(html, tag, tagsize, "href"))) {
/* if it's a javascript link, extract the reference. */
if (D_ASCII_TOLOWER(attrbuf[0]) == 'j')
attrbuf = Html_get_javascript_link(html);
url = a_Html_url_new(html, attrbuf, NULL, 0);
dReturn_if_fail ( url != NULL );
if (a_Capi_get_flags_with_redirection(url) & CAPI_IsCached) {
html->InVisitedLink = true;
html->styleEngine->setPseudoVisited ();
if (html->non_css_visited_color != -1)
html->styleEngine->setNonCssHint(CSS_PROPERTY_COLOR,
CSS_TYPE_COLOR,
html->non_css_visited_color);
} else {
html->styleEngine->setPseudoLink ();
if (html->non_css_link_color != -1)
html->styleEngine->setNonCssHint(CSS_PROPERTY_COLOR,
CSS_TYPE_COLOR,
html->non_css_link_color);
}
html->styleEngine->setNonCssHint (PROPERTY_X_LINK, CSS_TYPE_INTEGER,
Html_set_new_link(html, &url));
}
if (prefs.show_tooltip &&
(attrbuf = a_Html_get_attr(html, tag, tagsize, "title"))) {
html->styleEngine->setNonCssHint (PROPERTY_X_TOOLTIP, CSS_TYPE_STRING,
attrbuf);
}
html->styleEngine->inheritBackgroundColor ();
if ((attrbuf = a_Html_get_attr(html, tag, tagsize, "name"))) {
char *nameVal;
const char *id = html->styleEngine->getId ();
if (prefs.show_extra_warnings)
Html_check_name_val(html, attrbuf, "name");
nameVal = a_Url_decode_hex_str(attrbuf);
if (nameVal) {
/* We compare the "id" value with the url-decoded "name" value */
if (!id || strcmp(nameVal, id)) {
if (id)
BUG_MSG("In <a>, id ('%s') and name ('%s') attributes differ.",
id, nameVal);
Html_add_anchor(html, nameVal);
}
dFree(nameVal);
}
}
}
/*
* <A> close function
*/
static void Html_tag_close_a(DilloHtml *html)
{
html->InVisitedLink = false;
}
/*
* <BLOCKQUOTE>
*/
static void Html_tag_open_blockquote(DilloHtml *html,
const char *tag, int tagsize)
{
Html_add_textblock(html, true, 9, false);
}
/*
* <Q>
*/
static void Html_tag_open_q(DilloHtml *html, const char *tag, int tagsize)
{
/*
* Left Double Quotation Mark, which is wrong in many cases, but
* should at least be widely recognized.
*/
const char *U201C = "\xe2\x80\x9c";
html->styleEngine->inheritBackgroundColor ();
HT2TB(html)->addText (U201C, html->wordStyle ());
}
/*
* </Q>
*/
static void Html_tag_close_q(DilloHtml *html)
{
/* Right Double Quotation Mark */
const char *U201D = "\xe2\x80\x9d";
HT2TB(html)->addText (U201D, html->wordStyle ());
}
/*
* Handle the <UL> tag.
*/
static void Html_tag_open_ul(DilloHtml *html, const char *tag, int tagsize)
{
const char *attrbuf;
ListStyleType list_style_type;
if ((attrbuf = a_Html_get_attr(html, tag, tagsize, "type"))) {
/* list_style_type explicitly defined */
if (dStrAsciiCasecmp(attrbuf, "disc") == 0)
list_style_type = LIST_STYLE_TYPE_DISC;
else if (dStrAsciiCasecmp(attrbuf, "circle") == 0)
list_style_type = LIST_STYLE_TYPE_CIRCLE;
else if (dStrAsciiCasecmp(attrbuf, "square") == 0)
list_style_type = LIST_STYLE_TYPE_SQUARE;
else
/* invalid value */
list_style_type = LIST_STYLE_TYPE_DISC;
html->styleEngine->setNonCssHint (CSS_PROPERTY_LIST_STYLE_TYPE,
CSS_TYPE_ENUM, list_style_type);
if (html->DocType == DT_HTML && html->DocTypeVersion >= 5.0f)
BUG_MSG("<ul> type attribute is obsolete.");
}
S_TOP(html)->list_type = HTML_LIST_UNORDERED;
S_TOP(html)->list_number = 0;
S_TOP(html)->ref_list_item = NULL;
}
/*
* Handle the <DIR> or <MENU> tag.
* (Deprecated and almost the same as <UL>)
*/
static void Html_tag_open_dir(DilloHtml *html, const char *tag, int tagsize)
{
html->styleEngine->inheritBackgroundColor ();
HT2TB(html)->addParbreak (9, html->wordStyle ());
S_TOP(html)->list_type = HTML_LIST_UNORDERED;
S_TOP(html)->list_number = 0;
S_TOP(html)->ref_list_item = NULL;
if (prefs.show_extra_warnings)
BUG_MSG("Obsolete list type; use <ul> instead.");
}
/*
* Handle the <MENU> tag.
*/
static void Html_tag_open_menu(DilloHtml *html, const char *tag, int tagsize)
{
/* In another bit of ridiculous mess from the HTML5 world, the menu
* element, which was deprecated in HTML4:
* - does not appear at all in W3C's HTML5 spec
* - appears in WHATWG's HTML5 doc and the W3C's 5.1 draft, where it
* means something totally different than it did in the old days
* (now it's for popup menus and toolbar menus rather than being a
* sort of list).
*/
if (!(html->DocType == DT_HTML && html->DocTypeVersion >= 5.0f))
Html_tag_open_dir(html, tag, tagsize);
}
/*
* Handle the <OL> tag.
*/
static void Html_tag_open_ol(DilloHtml *html, const char *tag, int tagsize)
{
const char *attrbuf;
int n = 1;
if ((attrbuf = a_Html_get_attr(html, tag, tagsize, "type"))) {
ListStyleType listStyleType = LIST_STYLE_TYPE_DECIMAL;
if (*attrbuf == '1')
listStyleType = LIST_STYLE_TYPE_DECIMAL;
else if (*attrbuf == 'a')
listStyleType = LIST_STYLE_TYPE_LOWER_ALPHA;
else if (*attrbuf == 'A')
listStyleType = LIST_STYLE_TYPE_UPPER_ALPHA;
else if (*attrbuf == 'i')
listStyleType = LIST_STYLE_TYPE_LOWER_ROMAN;
else if (*attrbuf == 'I')
listStyleType = LIST_STYLE_TYPE_UPPER_ROMAN;
html->styleEngine->setNonCssHint (CSS_PROPERTY_LIST_STYLE_TYPE,
CSS_TYPE_ENUM, listStyleType);
}
S_TOP(html)->list_type = HTML_LIST_ORDERED;
if ((attrbuf = a_Html_get_attr(html, tag, tagsize, "start")) &&
(n = (int) strtol(attrbuf, NULL, 10)) < 0) {
BUG_MSG("Illegal '-' character in START attribute; Starting from 0.");
n = 0;
}
S_TOP(html)->list_number = n;
S_TOP(html)->ref_list_item = NULL;
}
/*
* Handle the <LI> tag.
*/
static void Html_tag_open_li(DilloHtml *html, const char *tag, int tagsize)
{
Style *style = html->style ();
int *list_number;
const char *attrbuf;
if (S_TOP(html)->list_type == HTML_LIST_NONE)
BUG_MSG("<li> outside <ul> or <ol>.");
html->InFlags |= IN_LI;
/* Get our parent tag's variables (used as state storage) */
list_number = &html->stack->getRef(html->stack->size()-2)->list_number;
if (style->listStyleType >= LIST_STYLE_TYPE_DECIMAL) {
// ordered
if ((attrbuf = a_Html_get_attr(html, tag, tagsize, "value")) &&
(*list_number = strtol(attrbuf, NULL, 10)) < 0) {
BUG_MSG("Illegal negative list value attribute; Starting from 0.");
*list_number = 0;
}
}
}
/*
* Close <LI>
*/
static void Html_tag_close_li(DilloHtml *html)
{
html->InFlags &= ~IN_LI;
((ListItem *)html->dw)->flush ();
}
/*
* <HR>
*/
static void Html_tag_open_hr(DilloHtml *html, const char *tag, int tagsize)
{
char *width_ptr;
const char *attrbuf;
int32_t size = 0;
width_ptr = a_Html_get_attr_wdef(html, tag, tagsize, "width", NULL);
if (width_ptr) {
if (html->DocType == DT_HTML && html->DocTypeVersion >= 5.0f)
BUG_MSG("<hr> width attribute is obsolete.");
html->styleEngine->setNonCssHint (CSS_PROPERTY_WIDTH,
CSS_TYPE_LENGTH_PERCENTAGE,
a_Html_parse_length (html, width_ptr));
dFree(width_ptr);
}
if ((attrbuf = a_Html_get_attr(html, tag, tagsize, "size"))) {
size = strtol(attrbuf, NULL, 10);
if (html->DocType == DT_HTML && html->DocTypeVersion >= 5.0f)
BUG_MSG("<hr> size attribute is obsolete.");
}
a_Html_tag_set_align_attr(html, tag, tagsize);
/* TODO: evaluate attribute */
if (a_Html_get_attr(html, tag, tagsize, "noshade")) {
if (html->DocType == DT_HTML && html->DocTypeVersion >= 5.0f)
BUG_MSG("<hr> noshade attribute is obsolete.");
html->styleEngine->setNonCssHint (CSS_PROPERTY_BORDER_TOP_STYLE,
CSS_TYPE_ENUM, BORDER_SOLID);
html->styleEngine->setNonCssHint (CSS_PROPERTY_BORDER_BOTTOM_STYLE,
CSS_TYPE_ENUM, BORDER_SOLID);
html->styleEngine->setNonCssHint (CSS_PROPERTY_BORDER_LEFT_STYLE,
CSS_TYPE_ENUM, BORDER_SOLID);
html->styleEngine->setNonCssHint (CSS_PROPERTY_BORDER_RIGHT_STYLE,
CSS_TYPE_ENUM, BORDER_SOLID);
if (size <= 0)
size = 1;
}
if (size > 0) {
CssLength size_top = CSS_CREATE_LENGTH ((size+1)/2, CSS_LENGTH_TYPE_PX);
CssLength size_bottom = CSS_CREATE_LENGTH (size / 2, CSS_LENGTH_TYPE_PX);
html->styleEngine->setNonCssHint (CSS_PROPERTY_BORDER_TOP_WIDTH,
CSS_TYPE_LENGTH_PERCENTAGE, size_top);
html->styleEngine->setNonCssHint (CSS_PROPERTY_BORDER_LEFT_WIDTH,
CSS_TYPE_LENGTH_PERCENTAGE, size_top);
html->styleEngine->setNonCssHint (CSS_PROPERTY_BORDER_BOTTOM_WIDTH,
CSS_TYPE_LENGTH_PERCENTAGE,
size_bottom);
html->styleEngine->setNonCssHint (CSS_PROPERTY_BORDER_RIGHT_WIDTH,
CSS_TYPE_LENGTH_PERCENTAGE,
size_bottom);
}
}
static void Html_tag_content_hr(DilloHtml *html, const char *tag, int tagsize)
{
Widget *hruler;
HT2TB(html)->addParbreak (5, html->wordStyle ());
hruler = new Ruler();
hruler->setStyle (html->style ());
HT2TB(html)->addWidget (hruler, html->style ());
HT2TB(html)->addParbreak (5, html->wordStyle ());
}
/*
* <DL>
*/
static void Html_tag_open_dl(DilloHtml *html, const char *tag, int tagsize)
{
/* may want to actually do some stuff here. */
html->styleEngine->inheritBackgroundColor ();
HT2TB(html)->addParbreak (9, html->wordStyle ());
}
/*
* <DT>
*/
static void Html_tag_open_dt(DilloHtml *html, const char *tag, int tagsize)
{
html->styleEngine->inheritBackgroundColor ();
HT2TB(html)->addParbreak (9, html->wordStyle ());
}
/*
* <DD>
*/
static void Html_tag_open_dd(DilloHtml *html, const char *tag, int tagsize)
{
Html_add_textblock(html, true, 9, false);
}
/*
* <PRE>
*/
static void Html_tag_open_pre(DilloHtml *html, const char *tag, int tagsize)
{
html->styleEngine->inheritBackgroundColor ();
HT2TB(html)->addParbreak (9, html->wordStyle ());
html->InFlags |= IN_PRE;
}
/*
* Custom close for <PRE>
*/
static void Html_tag_close_pre(DilloHtml *html)
{
html->InFlags &= ~IN_PRE;
}
/*
* Check whether a tag is in the "excluding" element set for PRE
* Excl. Set = {IMG, OBJECT, APPLET, BIG, SMALL, SUB, SUP, FONT, BASEFONT}
*/
static int Html_tag_pre_excludes(DilloHtml *html, int tag_idx)
{
if (!(html->DocType == DT_HTML && html->DocTypeVersion >= 5.0f)) {
/* HTML5 doesn't say anything about excluding elements */
const char *es_set[] = {"img", "object", "applet", "big", "small", "sub",
"sup", "font", "basefont", NULL};
static int ei_set[10], i;
/* initialize array */
if (!ei_set[0])
for (i = 0; es_set[i]; ++i)
ei_set[i] = a_Html_tag_index(es_set[i]);
for (i = 0; ei_set[i]; ++i)
if (tag_idx == ei_set[i])
return 1;
}
return 0;
}
/*
* Update the document's content type information based on meta tag data.
*/
static void Html_update_content_type(DilloHtml *html, const char *content)
{
const char *new_content = a_Capi_set_content_type(html->page_url, content,
"meta");
/* Cannot ask cache whether the content type was changed, as
* this code in another bw might have already changed it for us.
*/
if (a_Misc_content_type_cmp(html->content_type, new_content)) {
html->stop_parser = true; /* The cache buffer is no longer valid */
a_UIcmd_repush(html->bw);
}
}
/*
* Handle <META>
* We do not support http-equiv=refresh with delay>0 because it's
* non standard, (the HTML 4.01 SPEC recommends explicitly to avoid it).
* More info at:
* http://lists.w3.org/Archives/Public/www-html/2000Feb/thread.html#msg232
* Instant client-side redirects (delay=0) are supported:
* http://www.w3.org/TR/2008/NOTE-WCAG20-TECHS-20081211/H76.html
*
* TODO: Note that we're sending custom HTML while still IN_HEAD. This
* is a hackish way to put the message. A much cleaner approach is to
* build a custom widget for it.
*/
static void Html_tag_open_meta(DilloHtml *html, const char *tag, int tagsize)
{
const char meta_template[] =
"<table width='100%%'><tr><td bgcolor='#ee0000'>Warning:</td>\n"
" <td bgcolor='#8899aa' width='100%%'>\n"
" This page uses the NON-STANDARD meta refresh tag.<br> The HTML 4.01 SPEC\n"
" (sec 7.4.4) recommends explicitly to avoid it.</td></tr>\n"
" <tr><td bgcolor='#a0a0a0' colspan='2'>The author wanted you to go\n"
" <a href='%s'>here</a>%s</td></tr></table><br>\n";
const char *p, *equiv, *charset, *content;
char delay_str[64], *mr_url;
DilloUrl *new_url;
int delay;
/* only valid inside HEAD */
if (!(html->InFlags & IN_HEAD)) {
if (!((html->DocType == DT_HTML && html->DocTypeVersion >= 5.0f) &&
a_Html_get_attr(html, tag, tagsize, "itemprop"))) {
/* With the HTML 5.1 draft spec, meta with itemprop may appear
* in the body.
*/
BUG_MSG("This <meta> element must be inside the HEAD section.");
}
return;
}
if ((equiv = a_Html_get_attr(html, tag, tagsize, "http-equiv"))) {
if (!dStrAsciiCasecmp(equiv, "refresh") &&
(content = a_Html_get_attr(html, tag, tagsize, "content"))) {
/* Get delay, if present, and make a message with it */
if ((delay = strtol(content, NULL, 0))) {
snprintf(delay_str, 64, " after %d second%s.",
delay, (delay > 1) ? "s" : "");
} else {
sprintf(delay_str, ".");
}
/* Skip to anything after "URL=" or ";" if "URL=" is not found */
if ((p = dStriAsciiStr(content, "url=")))
content = p + strlen("url=");
else if ((p = strstr(content, ";")))
content = p + strlen(";");
/* Handle the case of a quoted URL */
if (*content == '"' || *content == '\'') {
if ((p = strchr(content + 1, *content)))
mr_url = dStrndup(content + 1, p - content - 1);
else
mr_url = dStrdup(content + 1);
} else {
mr_url = dStrdup(content);
}
new_url = a_Html_url_new(html, mr_url, NULL, 0);
if (a_Url_cmp(html->base_url, new_url) == 0) {
/* redirection loop, or empty url string: ignore */
BUG_MSG("<meta> refresh: %s.",
*mr_url ? "redirection loop" : "no target URL");
} else if (delay == 0) {
/* zero-delay redirection */
html->stop_parser = true;
if (URL_FLAGS(html->base_url) & URL_SpamSafe) {
a_UIcmd_set_msg(html->bw,
"WARNING: local URL with META refresh. Aborting.");
} else if (a_Capi_dpi_verify_request(html->bw, new_url)) {
a_UIcmd_redirection0((void*)html->bw, new_url);
}
} else {
/* Send a custom HTML message.
* TODO: This is a hairy hack,
* It'd be much better to build a widget. */
Dstr *ds_msg = dStr_sized_new(256);
dStr_sprintf(ds_msg, meta_template, URL_STR(new_url), delay_str);
{
int o_InFlags = html->InFlags;
int o_TagSoup = html->TagSoup;
html->InFlags = IN_BODY + IN_META_HACK;
html->TagSoup = false;
Html_write_raw(html, ds_msg->str, ds_msg->len, 0);
html->TagSoup = o_TagSoup;
html->InFlags = o_InFlags;
}
dStr_free(ds_msg, 1);
}
a_Url_free(new_url);
dFree(mr_url);
} else if (!dStrAsciiCasecmp(equiv, "content-type") &&
(content = a_Html_get_attr(html, tag, tagsize, "content"))) {
_MSG("Html_tag_open_meta: content={%s}\n", content);
Html_update_content_type(html, content);
}
} else if (html->DocType == DT_HTML && html->DocTypeVersion == 5.0f &&
(charset = a_Html_get_attr(html, tag, tagsize, "charset"))) {
char *content = dStrconcat("text/html; charset=", charset, NULL);
Html_update_content_type(html, content);
dFree(content);
}
}
/*
* Called by the network engine when a stylesheet has new data.
*/
static void Html_css_load_callback(int Op, CacheClient_t *Client)
{
_MSG("Html_css_load_callback: Op=%d\n", Op);
if (Op) { /* EOF */
BrowserWindow *bw = ((DilloWeb *)Client->Web)->bw;
/* Repush when we've got them all */
if (--bw->NumPendingStyleSheets == 0)
a_UIcmd_repush(bw);
}
}
/*
* Tell cache to retrieve a stylesheet
*/
void a_Html_load_stylesheet(DilloHtml *html, DilloUrl *url)
{
char *data;
int len;
dReturn_if (url == NULL || ! prefs.load_stylesheets);
_MSG("Html_load_stylesheet: ");
if ((a_Capi_get_flags_with_redirection(url) & CAPI_Completed) &&
a_Capi_get_buf(url, &data, &len)) {
_MSG("cached URL=%s len=%d", URL_STR(url), len);
if (strncmp("@charset \"", data, 10) == 0) {
char *endq = strchr(data+10, '"');
if (endq && (endq - data <= 51)) {
/* IANA limits charset names to 40 characters */
char *content_type;
*endq = '\0';
content_type = dStrconcat("text/css; charset=", data+10, NULL);
*endq = '"';
a_Capi_unref_buf(url);
a_Capi_set_content_type(url, content_type, "meta");
dFree(content_type);
a_Capi_get_buf(url, &data, &len);
}
}
html->styleEngine->parse(html, url, data, len, CSS_ORIGIN_AUTHOR);
a_Capi_unref_buf(url);
} else {
/* Fill a Web structure for the cache query */
int ClientKey;
DilloWeb *Web = a_Web_new(html->bw, url, html->page_url);
Web->flags |= WEB_Stylesheet;
if ((ClientKey = a_Capi_open_url(Web, Html_css_load_callback, NULL))) {
++html->bw->NumPendingStyleSheets;
a_Bw_add_client(html->bw, ClientKey, 0);
a_Bw_add_url(html->bw, url);
MSG("NumPendingStyleSheets=%d\n", html->bw->NumPendingStyleSheets);
}
}
_MSG("\n");
}
/*
* Parse the LINK element (Only CSS stylesheets by now).
* (If it either hits or misses, is not relevant here; that's up to the
* cache functions)
*
* TODO: How will we know when to use "handheld"? Ask the html->bw->ui for
* screen dimensions, or a dillorc preference.
*/
static void Html_tag_open_link(DilloHtml *html, const char *tag, int tagsize)
{
DilloUrl *url;
const char *attrbuf;
//char *tag_str = dStrndup(tag, tagsize);
//MSG("Html_tag_open_link(): %s\n", tag_str);
//dFree(tag_str);
/* When viewing suspicious HTML email, don't load LINK */
dReturn_if (URL_FLAGS(html->base_url) & URL_SpamSafe);
/* Ignore LINK outside HEAD */
if (!(html->InFlags & IN_HEAD)) {
if (!((html->DocType == DT_HTML && html->DocTypeVersion >= 5.0f) &&
a_Html_get_attr(html, tag, tagsize, "itemprop"))) {
/* With the HTML 5.1 draft spec, link with itemprop may appear
* in the body.
*/
BUG_MSG("This <link> element must be inside the HEAD section.");
}
return;
}
/* Remote stylesheets enabled? */
dReturn_if_fail (prefs.load_stylesheets);
/* CSS stylesheet link */
if (!(attrbuf = a_Html_get_attr(html, tag, tagsize, "rel")) ||
dStrAsciiCasecmp(attrbuf, "stylesheet"))
return;
/* IMPLIED attributes? */
if (((attrbuf = a_Html_get_attr(html, tag, tagsize, "type")) &&
dStrAsciiCasecmp(attrbuf, "text/css")) ||
((attrbuf = a_Html_get_attr(html, tag, tagsize, "media")) &&
!dStriAsciiStr(attrbuf, "screen") && dStrAsciiCasecmp(attrbuf, "all")))
return;
if (!(attrbuf = a_Html_get_attr(html, tag, tagsize, "href")) ||
!(url = a_Html_url_new(html, attrbuf, NULL, 0)))
return;
_MSG(" Html_tag_open_link(): addCssUrl %s\n", URL_STR(url));
html->addCssUrl(url);
a_Url_free(url);
}
/*
* Set the Document Base URI
*/
static void Html_tag_open_base(DilloHtml *html, const char *tag, int tagsize)
{
const char *attrbuf;
DilloUrl *BaseUrl;
if (html->InFlags & IN_HEAD) {
if ((attrbuf = a_Html_get_attr(html, tag, tagsize, "href"))) {
bool_t html5 = html->DocType == DT_HTML &&
html->DocTypeVersion >= 5.0f;
BaseUrl = html5 ? a_Html_url_new(html, attrbuf, NULL, 0) :
a_Html_url_new(html, attrbuf, "", 1);
if (html5 || URL_SCHEME_(BaseUrl)) {
/* Pass the URL_SpamSafe flag to the new base url */
a_Url_set_flags(
BaseUrl, URL_FLAGS(html->base_url) & URL_SpamSafe);
a_Url_free(html->base_url);
html->base_url = BaseUrl;
} else {
BUG_MSG("<base> URI is relative (it MUST be absolute).");
a_Url_free(BaseUrl);
}
}
} else {
BUG_MSG("<base> not inside HEAD section.");
}
}
static void Html_tag_open_default(DilloHtml *html,const char *tag,int tagsize)
{
html->styleEngine->inheritBackgroundColor();
}
/*
* <SPAN>
*/
static void Html_tag_open_span(DilloHtml *html, const char *tag, int tagsize)
{
const char *attrbuf;
html->styleEngine->inheritBackgroundColor();
if (prefs.show_tooltip &&
(attrbuf = a_Html_get_attr(html, tag, tagsize, "title"))) {
html->styleEngine->setNonCssHint (PROPERTY_X_TOOLTIP, CSS_TYPE_STRING,
attrbuf);
}
}
/*
* html5 sectioning stuff: article aside nav section header footer
*/
static void Html_tag_open_sectioning(DilloHtml *html, const char *tag,
int tagsize)
{
const char *attrbuf;
if (prefs.show_tooltip &&
(attrbuf = a_Html_get_attr(html, tag, tagsize, "title"))) {
html->styleEngine->setNonCssHint (PROPERTY_X_TOOLTIP, CSS_TYPE_STRING,
attrbuf);
}
}
/*
* <DIV> (TODO: make a complete implementation)
*/
static void Html_tag_open_div(DilloHtml *html, const char *tag, int tagsize)
{
a_Html_tag_set_align_attr (html, tag, tagsize);
Html_tag_open_sectioning(html, tag, tagsize);
}
/*
* Default close for paragraph tags - pop the stack and break.
*/
static void Html_tag_close_par(DilloHtml *html)
{
HT2TB(html)->addParbreak (9, html->wordStyle ());
}
/*
* <WBR> "The wbr element represents a line break opportunity."
*/
static void Html_tag_content_wbr(DilloHtml *html, const char *tag, int tagsize)
{
HT2TB(html)->addBreakOption(html->wordStyle (), true);
}
/*
* Function index for the open, content, and close functions for each tag
* (Alphabetically sorted for a binary search).
* The open and close functions are always called. They are used for style
* handling and HTML bug reporting.
* Content creation (e.g. adding new widgets or text) is done in the content
* function, which is not called in the display:none case.
* Note: many tags don't need a content function (e.g. <div>, <span>, ...).
*
* Explanation for the 'Flags' field:
*
* {"address", B8(010110), ...}
* |||||`- inline element
* ||||`-- block element
* |||`--- inline container
* ||`---- block container
* |`----- body element
* `------ head element
*
* Notes:
* - The upper two bits are not used yet.
* - Empty elements have both inline and block container clear.
* (flow have both set)
*/
const TagInfo Tags[] = {
{"a", B8(011101),'R',2, Html_tag_open_a, NULL, Html_tag_close_a},
{"abbr", B8(010101),'R',2, Html_tag_open_abbr, NULL, NULL},
/* acronym 010101 -- obsolete in HTML5 */
{"address", B8(011110),'R',2,Html_tag_open_default, NULL, Html_tag_close_par},
{"area", B8(010001),'F',0, Html_tag_open_default, Html_tag_content_area,
NULL},
{"article", B8(011110),'R',2, Html_tag_open_sectioning, NULL, NULL},
{"aside", B8(011110),'R',2, Html_tag_open_sectioning, NULL, NULL},
{"audio", B8(011101),'R',2, Html_tag_open_audio, NULL, Html_tag_close_media},
{"b", B8(010101),'R',2, Html_tag_open_default, NULL, NULL},
{"base", B8(100001),'F',0, Html_tag_open_base, NULL, NULL},
/* basefont 010001 -- obsolete in HTML5 */
/* bdo 010101 */
{"big", B8(010101),'R',2, Html_tag_open_default, NULL, NULL},
{"blockquote", B8(011110),'R',2, Html_tag_open_blockquote, NULL,
NULL},
{"body", B8(011110),'O',1, Html_tag_open_body, NULL, Html_tag_close_body},
{"br", B8(010001),'F',0, Html_tag_open_default, Html_tag_content_br,
NULL},
{"button", B8(011101),'R',2, Html_tag_open_button,NULL,Html_tag_close_button},
/* caption */
{"center", B8(011110),'R',2, Html_tag_open_default, NULL, NULL},
{"cite", B8(010101),'R',2, Html_tag_open_default, NULL, NULL},
{"code", B8(010101),'R',2, Html_tag_open_default, NULL, NULL},
/* col 010010 'F' */
/* colgroup */
{"dd", B8(011110),'O',1, Html_tag_open_dd, NULL, NULL},
{"del", B8(011101),'R',2, Html_tag_open_default, NULL, NULL},
{"dfn", B8(010101),'R',2, Html_tag_open_default, NULL, NULL},
{"dir", B8(011010),'R',2, Html_tag_open_dir, NULL, Html_tag_close_par},
/* TODO: complete <div> support! */
{"div", B8(011110),'R',2, Html_tag_open_div, NULL, NULL},
{"dl", B8(011010),'R',2, Html_tag_open_dl, NULL, Html_tag_close_par},
{"dt", B8(010110),'O',1, Html_tag_open_dt, NULL, Html_tag_close_par},
{"em", B8(010101),'R',2, Html_tag_open_default, NULL, NULL},
{"embed", B8(010001),'F',0, Html_tag_open_embed, Html_tag_content_embed,NULL},
/* fieldset */
{"figcaption", B8(011110),'R',2, Html_tag_open_default, NULL, NULL},
{"figure", B8(011110),'R',2, Html_tag_open_default, NULL, NULL},
{"font", B8(010101),'R',2, Html_tag_open_font, NULL, NULL},
{"footer", B8(011110),'R',2, Html_tag_open_sectioning, NULL, NULL},
{"form", B8(011110),'R',2, Html_tag_open_form, NULL, Html_tag_close_form},
{"frame", B8(010010),'F',0, Html_tag_open_frame, Html_tag_content_frame,
NULL},
{"frameset", B8(011110),'R',2, Html_tag_open_default,
Html_tag_content_frameset, NULL},
{"h1", B8(010110),'R',2, Html_tag_open_h, NULL, NULL},
{"h2", B8(010110),'R',2, Html_tag_open_h, NULL, NULL},
{"h3", B8(010110),'R',2, Html_tag_open_h, NULL, NULL},
{"h4", B8(010110),'R',2, Html_tag_open_h, NULL, NULL},
{"h5", B8(010110),'R',2, Html_tag_open_h, NULL, NULL},
{"h6", B8(010110),'R',2, Html_tag_open_h, NULL, NULL},
{"head", B8(101101),'O',1, Html_tag_open_head, NULL, Html_tag_close_head},
{"header", B8(011110),'R',2, Html_tag_open_sectioning, NULL, NULL},
{"hr", B8(010010),'F',0, Html_tag_open_hr, Html_tag_content_hr,
NULL},
{"html", B8(001110),'O',1, Html_tag_open_html, NULL, Html_tag_close_html},
{"i", B8(010101),'R',2, Html_tag_open_default, NULL, NULL},
{"iframe", B8(011110),'R',2, Html_tag_open_frame, Html_tag_content_frame,
NULL},
{"img", B8(010001),'F',0, Html_tag_open_img, Html_tag_content_img,
NULL},
{"input", B8(010001),'F',0, Html_tag_open_input, NULL, NULL},
{"ins", B8(011101),'R',2, Html_tag_open_default, NULL, NULL},
{"isindex", B8(110001),'F',0, Html_tag_open_isindex, NULL, NULL},
{"kbd", B8(010101),'R',2, Html_tag_open_default, NULL, NULL},
/* label 010101 */
/* legend 01?? */
{"li", B8(011110),'O',1, Html_tag_open_li, NULL, Html_tag_close_li},
{"link", B8(100001),'F',0, Html_tag_open_link, NULL, NULL},
{"map", B8(011001),'R',2, Html_tag_open_default, Html_tag_content_map,
Html_tag_close_map},
{"mark", B8(010101),'R',2, Html_tag_open_default, NULL, NULL},
/* menu 1010 -- TODO: not exactly 1010, it can contain LI and inline */
{"menu", B8(011010),'R',2, Html_tag_open_menu, NULL, Html_tag_close_par},
{"meta", B8(110001),'F',0, Html_tag_open_meta, NULL, NULL},
{"nav", B8(011110),'R',2, Html_tag_open_sectioning, NULL, NULL},
/* noframes 1011 -- obsolete in HTML5 */
/* noscript 1011 */
{"object", B8(111101),'R',2, Html_tag_open_object, Html_tag_content_object,
NULL},
{"ol", B8(011010),'R',2, Html_tag_open_ol, NULL, NULL},
{"optgroup", B8(010101),'O',1, Html_tag_open_optgroup, NULL,
Html_tag_close_optgroup},
{"option", B8(010001),'O',0, Html_tag_open_option,NULL,Html_tag_close_option},
{"p", B8(010110),'O',1, Html_tag_open_p, NULL, NULL},
/* param 010001 'F' */
{"pre", B8(010110),'R',2, Html_tag_open_pre, NULL, Html_tag_close_pre},
{"q", B8(010101),'R',2, Html_tag_open_q, NULL, Html_tag_close_q},
{"s", B8(010101),'R',2, Html_tag_open_default, NULL, NULL},
{"samp", B8(010101),'R',2, Html_tag_open_default, NULL, NULL},
{"script", B8(111001),'R',2, Html_tag_open_script,NULL,Html_tag_close_script},
{"section", B8(011110),'R',2, Html_tag_open_sectioning, NULL, NULL},
{"select", B8(010101),'R',2, Html_tag_open_select,NULL,Html_tag_close_select},
{"small", B8(010101),'R',2, Html_tag_open_default, NULL, NULL},
{"source", B8(010001),'F',0, Html_tag_open_source, Html_tag_content_source,
NULL},
{"span", B8(010101),'R',2, Html_tag_open_span, NULL, NULL},
{"strike", B8(010101),'R',2, Html_tag_open_default, NULL, NULL},
{"strong", B8(010101),'R',2, Html_tag_open_default, NULL, NULL},
{"style", B8(100101),'R',2, Html_tag_open_style, NULL, Html_tag_close_style},
{"sub", B8(010101),'R',2, Html_tag_open_default, NULL, NULL},
{"sup", B8(010101),'R',2, Html_tag_open_default, NULL, NULL},
{"table", B8(011010),'R',5, Html_tag_open_table, Html_tag_content_table,
NULL},
/* tbody */
{"td", B8(011110),'O',3, Html_tag_open_td, Html_tag_content_td,
NULL},
{"textarea", B8(010101),'R', 2, Html_tag_open_textarea,
Html_tag_content_textarea, Html_tag_close_textarea},
/* tfoot */
{"th", B8(011110),'O',1, Html_tag_open_th, Html_tag_content_th,
NULL},
/* thead */
{"title", B8(100101),'R',2, Html_tag_open_title, NULL, Html_tag_close_title},
{"tr", B8(011010),'O',4, Html_tag_open_tr, Html_tag_content_tr,
NULL},
{"tt", B8(010101),'R',2, Html_tag_open_default, NULL, NULL},
{"u", B8(010101),'R',2, Html_tag_open_default, NULL, NULL},
{"ul", B8(011010),'R',2, Html_tag_open_ul, NULL, NULL},
{"var", B8(010101),'R',2, Html_tag_open_default, NULL, NULL},
{"video", B8(011101),'R',2, Html_tag_open_video, NULL, Html_tag_close_media},
{"wbr", B8(010101),'F',0, Html_tag_open_default, Html_tag_content_wbr, NULL}
};
#define NTAGS (sizeof(Tags)/sizeof(Tags[0]))
/*
* Compares tag from buffer ('/' or '>' or space-ended string) [p1]
* with tag from taglist (lowercase, zero ended string) [p2]
* Return value: as strcmp()
*/
static int Html_tag_compare(const char *p1, const char *p2)
{
while ( *p2 ) {
if (D_ASCII_TOLOWER(*p1) != *p2)
return(D_ASCII_TOLOWER(*p1) - *p2);
++p1;
++p2;
}
return !strchr(" >/\n\r\t", *p1);
}
/*
* Get 'tag' index
* return -1 if tag is not handled yet
*/
int a_Html_tag_index(const char *tag)
{
int low, high, mid, cond;
/* Binary search */
low = 0;
high = NTAGS - 1; /* Last tag index */
while (low <= high) {
mid = (low + high) / 2;
if ((cond = Html_tag_compare(tag, Tags[mid].name)) < 0 )
high = mid - 1;
else if (cond > 0)
low = mid + 1;
else
return mid;
}
return -1;
}
/*
* For elements with optional close, check whether is time to close.
* Return value: (1: Close, 0: Don't close)
* --tuned for speed.
*/
static int Html_needs_optional_close(int old_idx, int cur_idx)
{
static int i_P = -1, i_LI, i_TD, i_TR, i_TH, i_DD, i_DT, i_OPTION;
// i_THEAD, i_TFOOT, i_COLGROUP;
if (i_P == -1) {
/* initialize the indexes of elements with optional close */
i_P = a_Html_tag_index("p"),
i_LI = a_Html_tag_index("li"),
i_TD = a_Html_tag_index("td"),
i_TR = a_Html_tag_index("tr"),
i_TH = a_Html_tag_index("th"),
i_DD = a_Html_tag_index("dd"),
i_DT = a_Html_tag_index("dt"),
i_OPTION = a_Html_tag_index("option");
// i_THEAD = a_Html_tag_index("thead");
// i_TFOOT = a_Html_tag_index("tfoot");
// i_COLGROUP = a_Html_tag_index("colgroup");
}
if (old_idx == i_P || old_idx == i_DT) {
/* P and DT are closed by block elements */
return (Tags[cur_idx].Flags & 2);
} else if (old_idx == i_LI) {
/* LI closes LI */
return (cur_idx == i_LI);
} else if (old_idx == i_TD || old_idx == i_TH) {
/* TD and TH are closed by TD, TH and TR */
return (cur_idx == i_TD || cur_idx == i_TH || cur_idx == i_TR);
} else if (old_idx == i_TR) {
/* TR closes TR */
return (cur_idx == i_TR);
} else if (old_idx == i_DD) {
/* DD is closed by DD and DT */
return (cur_idx == i_DD || cur_idx == i_DT);
} else if (old_idx == i_OPTION) {
return 1; // OPTION always needs close
}
/* HTML, HEAD, BODY are handled by Html_test_section(), not here. */
/* TODO: TBODY is pending */
return 0;
}
/*
* Conditional cleanup of the stack (at open time).
* - This helps catching block elements inside inline containers (a BUG).
* - It also closes elements with "optional" close tag.
*
* This function is called when opening a block element or <OPTION>.
*
* It searches the stack closing open inline containers, and closing
* elements with optional close tag when necessary.
*
* Note: OPTION is the only non-block element with an optional close.
*/
static void Html_stack_cleanup_at_open(DilloHtml *html, int new_idx)
{
/* We know that the element we're about to push is a block element.
* (except for OPTION, which is an empty inline, so is closed anyway)
* Notes:
* Its 'tag' is not yet pushed into the stack,
* 'new_idx' is its index inside Tags[].
*/
if (!html->TagSoup)
return;
while (html->stack->size() > 1) {
int oldtag_idx = S_TOP(html)->tag_idx;
if (Tags[oldtag_idx].EndTag == 'O') { // Element with optional close
if (!Html_needs_optional_close(oldtag_idx, new_idx))
break;
} else if (Tags[oldtag_idx].Flags & 8) { // Block container
break;
}
/* we have an inline (or empty) container... */
if (Tags[oldtag_idx].EndTag == 'R') {
BUG_MSG("<%s> is not allowed to contain <%s>. -- closing <%s>.",
Tags[oldtag_idx].name, Tags[new_idx].name,
Tags[oldtag_idx].name);
}
/* Workaround for Apache and its bad HTML directory listings... */
if ((html->InFlags & IN_PRE) &&
strcmp(Tags[new_idx].name, "hr") == 0)
break;
/* Avoid OPTION closing SELECT */
if ((html->InFlags & IN_SELECT) &&
strcmp(Tags[new_idx].name,"option") == 0)
break;
/* This call closes the top tag only. */
Html_tag_cleanup_at_close(html, oldtag_idx);
}
}
/*
* HTML, HEAD and BODY elements have optional open and close tags.
* Handle this "magic" here.
*/
static void Html_test_section(DilloHtml *html, int new_idx, int IsCloseTag)
{
const char *tag;
int tag_idx;
if (!(html->InFlags & IN_HTML) && html->DocType == DT_NONE)
BUG_MSG("The required DOCTYPE declaration is missing. "
"Handling as HTML4.");
if (!(html->InFlags & IN_HTML)) {
tag = "<html>";
tag_idx = a_Html_tag_index(tag + 1);
if (tag_idx != new_idx || IsCloseTag) {
/* implicit open */
Html_force_push_tag(html, tag_idx);
_MSG("Open : %*s%s\n", html->stack->size()," ",Tags[tag_idx].name);
Tags[tag_idx].open (html, tag, strlen(tag));
}
}
if (Tags[new_idx].Flags & 32) {
/* head element */
if (!(html->InFlags & IN_HEAD) && html->Num_HEAD == 0) {
tag = "<head>";
tag_idx = a_Html_tag_index(tag + 1);
if (tag_idx != new_idx || IsCloseTag) {
/* implicit open of the head element */
Html_force_push_tag(html, tag_idx);
_MSG("Open : %*s%s\n", html->stack->size()," ",Tags[tag_idx].name);
Tags[tag_idx].open (html, tag, strlen(tag));
}
}
} else if (Tags[new_idx].Flags & 16) {
/* body element */
if (html->InFlags & IN_HEAD) {
tag = "</head>";
tag_idx = a_Html_tag_index(tag + 2);
Html_tag_cleanup_at_close(html, tag_idx);
}
tag = "<body>";
tag_idx = a_Html_tag_index(tag + 1);
if (tag_idx != new_idx || IsCloseTag) {
/* implicit open */
Html_force_push_tag(html, tag_idx);
_MSG("Open : %*s%s\n", html->stack->size()," ",Tags[tag_idx].name);
Tags[tag_idx].open (html, tag, strlen(tag));
}
}
}
/*
* Parse attributes that can appear on any tag.
*/
static void Html_parse_common_attrs(DilloHtml *html, char *tag, int tagsize)
{
const char *attrbuf;
char lang[3];
if (tagsize >= 8 && /* length of "<t id=i>" */
(attrbuf = a_Html_get_attr(html, tag, tagsize, "id"))) {
/* According to the SGML declaration of HTML 4, all NAME values
* occuring outside entities must be converted to uppercase
* (this is what "NAMECASE GENERAL YES" says). But the HTML 4
* spec states in Sec. 7.5.2 that anchor ids are case-sensitive.
* So we don't do it and hope for better specs in the future ...
*/
Html_check_name_val(html, attrbuf, "id");
html->styleEngine->setId(attrbuf);
}
if (tagsize >= 11 && (prefs.parse_embedded_css || prefs.load_stylesheets)) {
/* length of "<t class=i>" or "<t style=i>" */
attrbuf = a_Html_get_attr(html, tag, tagsize, "class");
if (attrbuf)
html->styleEngine->setClass (attrbuf);
attrbuf = a_Html_get_attr(html, tag, tagsize, "style");
if (attrbuf)
html->styleEngine->setStyle (attrbuf);
}
/* handle "xml:lang" and "lang" attributes
* We use only the first two chars of the value to deal with
* extended language tags (see http://www.rfc-editor.org/rfc/bcp/bcp47.txt)
*/
memset(lang, 0, sizeof(lang));
if (tagsize >= 14) {
/* length of "<t xml:lang=i>" */
attrbuf = a_Html_get_attr(html, tag, tagsize, "xml:lang");
if (attrbuf)
strncpy(lang, attrbuf, 2);
}
if (!lang[0] && tagsize >= 10) { /* 'xml:lang' prevails over 'lang' */
/* length of "<t lang=i>" */
attrbuf = a_Html_get_attr(html, tag, tagsize, "lang");
if (attrbuf)
strncpy(lang, attrbuf, 2);
}
if (lang[0])
html->styleEngine->setNonCssHint(PROPERTY_X_LANG, CSS_TYPE_STRING, lang);
}
/*
* Warn when encountering elements that are obsolete in HTML5. This list
* was from the "W3C Candidate Recommendation 6 August 2013".
*/
static void Html_check_html5_obsolete(DilloHtml *html, int ni)
{
static int indexes[9] = {-1};
if (indexes[0] == -1) {
indexes[0] = a_Html_tag_index("dir");
indexes[1] = a_Html_tag_index("frame");
indexes[2] = a_Html_tag_index("frameset");
indexes[3] = a_Html_tag_index("isindex");
indexes[4] = a_Html_tag_index("strike");
indexes[5] = a_Html_tag_index("big");
indexes[6] = a_Html_tag_index("center");
indexes[7] = a_Html_tag_index("font");
indexes[8] = a_Html_tag_index("tt");
}
for (int i = 0; i < 9; i++) {
if (indexes[i] == ni) {
BUG_MSG("<%s> is obsolete in HTML5.", Tags[ni].name);
break;
}
}
}
static void Html_display_block(DilloHtml *html)
{
Html_add_textblock(html, Html_must_add_breaks (html), 0,
false /* Perhaps true for widgets oof? */);
}
static void Html_display_inline_block(DilloHtml *html)
{
Html_add_textblock(html, false, 0, true);
}
static void Html_display_listitem(DilloHtml *html)
{
Style *style = html->style ();
Style *wordStyle = html->wordStyle ();
Widget **ref_list_item;
ListItem *list_item;
int *list_number;
char buf[16];
/* Get our parent tag's variables (used as state storage) */
list_number = &html->stack->getRef(html->stack->size()-2)->list_number;
ref_list_item = &html->stack->getRef(html->stack->size()-2)->ref_list_item;
HT2TB(html)->addParbreak (0, wordStyle);
list_item = new ListItem ((ListItem*)*ref_list_item,prefs.limit_text_width);
HT2TB(html)->addWidget (list_item, style);
HT2TB(html)->addParbreak (0, wordStyle);
*ref_list_item = list_item;
S_TOP(html)->textblock = html->dw = list_item;
if (style->listStyleType == LIST_STYLE_TYPE_NONE) {
// none
} else if (style->listStyleType >= LIST_STYLE_TYPE_DECIMAL) {
// ordered
numtostr((*list_number)++, buf, 16, style->listStyleType);
list_item->initWithText (buf, wordStyle);
} else {
// unordered
list_item->initWithWidget (new Bullet(), wordStyle);
}
}
/*
* Process a tag, given as 'tag' and 'tagsize'. -- tagsize is [1 based]
* ('tag' must include the enclosing angle brackets)
* This function calls the right open or close function for the tag.
*/
static void Html_process_tag(DilloHtml *html, char *tag, int tagsize)
{
static int i_HTML = a_Html_tag_index("html");
int ci, ni; /* current and new tag indexes */
char *start = tag + 1; /* discard the '<' */
int IsCloseTag = (*start == '/');
dReturn_if (html->stop_parser == true);
ni = a_Html_tag_index(start + IsCloseTag);
if (ni == -1) {
/* TODO: doctype parsing is a bit fuzzy, but enough for the time being */
if (!(html->InFlags & IN_HTML)) {
if (tagsize > 9 && !dStrnAsciiCasecmp(tag, "<!doctype", 9))
Html_parse_doctype(html, tag, tagsize);
}
/* Ignore unknown tags */
return;
}
_MSG("Html_process_tag: %s%s\n", IsCloseTag ? "/" : "", Tags[ni].name);
if (!IsCloseTag && html->DocType == DT_HTML && html->DocTypeVersion >= 5.0f)
Html_check_html5_obsolete(html, ni);
int i = html->PrevWasHtmlClose ? 1 : html->PrevWasBodyClose ? 2 : 0;
if (i == 1 || (i == 2 && ni != i_HTML))
BUG_MSG("Content after </%s> tag.", i == 1 ? "html" : "body");
html->PrevWasHtmlClose = html->PrevWasBodyClose = false;
/* Handle HTML, HEAD and BODY. Elements with optional open and close */
if (!(html->InFlags & IN_BODY) /* && parsing HTML */)
Html_test_section(html, ni, IsCloseTag);
/* Tag processing */
ci = S_TOP(html)->tag_idx;
switch (IsCloseTag) {
case 0:
/* Open function */
/* Cleanup when opening a block element, or
* when openning over an element with optional close */
if (Tags[ni].Flags & 2 || (ci != -1 && Tags[ci].EndTag == 'O'))
Html_stack_cleanup_at_open(html, ni);
/* TODO: this is only raising a warning, take some defined action.
* Note: apache uses IMG inside PRE (we could use its "alt"). */
if ((html->InFlags & IN_PRE) && Html_tag_pre_excludes(html, ni))
BUG_MSG("<pre> is not allowed to contain <%s>.", Tags[ni].name);
/* Make sure these elements don't nest each other */
if (html->InFlags & (IN_BUTTON | IN_SELECT | IN_TEXTAREA))
Html_tag_cleanup_nested_inputs(html, ni);
/* Push the tag into the stack */
Html_push_tag(html, ni);
html->startElement (ni);
_MSG("Open : %*s%s\n", html->stack->size(), " ", Tags[ni].name);
/* Parse attributes that can appear on any tag */
Html_parse_common_attrs(html, tag, tagsize);
/* Call the open function for this tag */
_MSG("Html_process_tag Open : %s\n", Tags[ni].name);
Tags[ni].open (html, tag, tagsize);
if (! S_TOP(html)->display_none) {
switch (html->style ()->display) {
case DISPLAY_BLOCK:
Html_display_block(html);
break;
case DISPLAY_INLINE_BLOCK:
Html_display_inline_block(html);
break;
case DISPLAY_LIST_ITEM:
Html_display_listitem(html);
break;
case DISPLAY_NONE:
S_TOP(html)->display_none = true;
break;
case DISPLAY_INLINE:
default:
break;
}
if (Tags[ni].content && ! S_TOP(html)->display_none) {
Tags[ni].content (html, tag, tagsize);
}
}
if (html->stop_parser)
break;
if (S_TOP(html)->parse_mode == DILLO_HTML_PARSE_MODE_VERBATIM) {
/* don't change anything */
} else if (S_TOP(html)->parse_mode != DILLO_HTML_PARSE_MODE_PRE &&
(html->style ()->whiteSpace == WHITE_SPACE_PRE ||
html->style ()->whiteSpace == WHITE_SPACE_PRE_WRAP)) {
S_TOP(html)->parse_mode = DILLO_HTML_PARSE_MODE_PRE;
html->pre_column = 0;
html->PreFirstChar = true;
}
if (html->styleEngine->getId ())
Html_add_anchor(html, html->styleEngine->getId ());
/* Request immediate close for elements with forbidden close tag. */
/* TODO: XHTML always requires close tags. A simple implementation
* of the commented clause below will make it work. */
if (/* parsing HTML && */ Tags[ni].EndTag == 'F')
html->ReqTagClose = true;
/* Don't break! Open tags may also close themselves */
default:
/* Close function */
/* Test for </x>, ReqTagClose, <x /> and <x/> */
if (*start == '/' || /* </x> */
html->ReqTagClose || /* request */
(tag[tagsize-2] == '/' && /* XML: */
(strchr(" \"'", tag[tagsize-3]) || /* [ "']/> */
(size_t)tagsize == strlen(Tags[ni].name) + 3))) { /* <x/> */
_MSG("Html_process_tag Close: %s\n", Tags[ni].name);
Html_tag_cleanup_at_close(html, ni);
/* This was a close tag */
html->ReqTagClose = false;
}
}
}
/*
* Get attribute value for 'attrname' and return it.
* Tags start with '<' and end with a '>' (Ex: "<P align=center>")
* tagsize = strlen(tag) from '<' to '>', inclusive.
*
* Returns one of the following:
* * The value of the attribute.
* * An empty string if the attribute exists but has no value.
* * NULL if the attribute doesn't exist.
*/
static const char *Html_get_attr2(DilloHtml *html,
const char *tag,
int tagsize,
const char *attrname,
int tag_parsing_flags)
{
int i, entsize, Found = 0, delimiter = 0, attr_pos = 0;
Dstr *Buf = html->attr_data;
DilloHtmlTagParsingState state = SEEK_ATTR_START;
dReturn_val_if_fail(*attrname, NULL);
dStr_truncate(Buf, 0);
for (i = 1; i < tagsize; ++i) {
switch (state) {
case SEEK_ATTR_START:
if (isspace(tag[i]))
state = SEEK_TOKEN_START;
else if (tag[i] == '=')
state = SEEK_VALUE_START;
break;
case MATCH_ATTR_NAME:
if (!attrname[attr_pos] &&
(tag[i] == '=' || isspace(tag[i]) || tag[i] == '>')) {
Found = 1;
state = SEEK_TOKEN_START;
--i;
} else if (!tag[i]) {
state = SEEK_ATTR_START; // NULL byte is not allowed
} else {
if (D_ASCII_TOLOWER(tag[i]) != D_ASCII_TOLOWER(attrname[attr_pos]))
state = SEEK_ATTR_START;
attr_pos++;
}
break;
case SEEK_TOKEN_START:
if (tag[i] == '=') {
state = SEEK_VALUE_START;
} else if (!isspace(tag[i])) {
attr_pos = 0;
state = (Found) ? FINISHED : MATCH_ATTR_NAME;
--i;
}
break;
case SEEK_VALUE_START:
if (!isspace(tag[i])) {
delimiter = (tag[i] == '"' || tag[i] == '\'') ? tag[i] : ' ';
i -= (delimiter == ' ');
state = (Found) ? GET_VALUE : SKIP_VALUE;
}
break;
case SKIP_VALUE:
if ((delimiter == ' ' && isspace(tag[i])) || tag[i] == delimiter)
state = SEEK_TOKEN_START;
break;
case GET_VALUE:
if ((delimiter == ' ' && (isspace(tag[i]) || tag[i] == '>')) ||
tag[i] == delimiter) {
state = FINISHED;
} else if (tag[i] == '&' &&
(tag_parsing_flags & HTML_ParseEntities)) {
const char *entstr;
const bool_t is_attr = TRUE;
if ((entstr = Html_parse_entity(html, tag+i, tagsize-i, &entsize,
is_attr))) {
dStr_append(Buf, entstr);
i += entsize-1;
} else {
dStr_append_c(Buf, tag[i]);
}
} else if (tag[i] == '\r' || tag[i] == '\t') {
dStr_append_c(Buf, ' ');
} else if (tag[i] == '\n') {
/* ignore */
} else {
dStr_append_c(Buf, tag[i]);
}
break;
case FINISHED:
i = tagsize;
break;
}
}
if (tag_parsing_flags & HTML_LeftTrim)
while (isspace(Buf->str[0]))
dStr_erase(Buf, 0, 1);
if (tag_parsing_flags & HTML_RightTrim)
while (Buf->len && isspace(Buf->str[Buf->len - 1]))
dStr_truncate(Buf, Buf->len - 1);
return (Found) ? Buf->str : NULL;
}
/*
* Call Html_get_attr2 telling it to parse entities and strip the result
*/
const char *a_Html_get_attr(DilloHtml *html,
const char *tag,
int tagsize,
const char *attrname)
{
return Html_get_attr2(html, tag, tagsize, attrname,
HTML_LeftTrim | HTML_RightTrim | HTML_ParseEntities);
}
/*
* "a_Html_get_attr with default"
* Call a_Html_get_attr() and dStrdup() the returned string.
* If the attribute isn't found a copy of 'def' is returned.
*/
char *a_Html_get_attr_wdef(DilloHtml *html,
const char *tag,
int tagsize,
const char *attrname,
const char *def)
{
const char *attrbuf = a_Html_get_attr(html, tag, tagsize, attrname);
return attrbuf ? dStrdup(attrbuf) : dStrdup(def);
}
/*
* Dispatch the apropriate function for 'Op'
* This function is a Cache client and gets called whenever new data arrives
* Op : operation to perform.
* CbData : a pointer to a DilloHtml structure
* Buf : a pointer to new data
* BufSize : new data size (in bytes)
*/
static void Html_callback(int Op, CacheClient_t *Client)
{
DilloHtml *html = (DilloHtml*)Client->CbData;
if (Op) { /* EOF */
html->write((char*)Client->Buf, Client->BufSize, 1);
html->finishParsing(Client->Key);
} else {
html->write((char*)Client->Buf, Client->BufSize, 0);
}
}
/*
* Here's where we parse the html and put it into the Textblock structure.
* Return value: number of bytes parsed
*/
static int Html_write_raw(DilloHtml *html, char *buf, int bufsize, int Eof)
{
char ch = 0, *p, *text;
int token_start, buf_index;
/* Now, 'buf' and 'bufsize' define a buffer aligned to start at a token
* boundary. Iterate through tokens until end of buffer is reached. */
buf_index = 0;
token_start = buf_index;
while ((buf_index < bufsize) && !html->stop_parser) {
/* invariant: buf_index == bufsize || token_start == buf_index */
if (S_TOP(html)->parse_mode ==
DILLO_HTML_PARSE_MODE_VERBATIM) {
/* Non HTML code here, let's skip until closing tag */
do {
const char *tag = Tags[S_TOP(html)->tag_idx].name;
buf_index += strcspn(buf + buf_index, "<");
if (buf_index + (int)strlen(tag) + 3 > bufsize) {
buf_index = bufsize;
} else if (strncmp(buf + buf_index, "</", 2) == 0 &&
Html_match_tag(tag, buf+buf_index+2, strlen(tag)+1)) {
/* copy VERBATIM text into the stash buffer */
text = dStrndup(buf + token_start, buf_index - token_start);
dStr_append(html->Stash, text);
dFree(text);
token_start = buf_index;
break;
} else
++buf_index;
} while (buf_index < bufsize);
if (buf_index == bufsize)
break;
}
if (isspace(buf[buf_index])) {
/* whitespace: group all available whitespace */
while (++buf_index < bufsize && isspace(buf[buf_index])) ;
Html_process_space(html, buf + token_start, buf_index - token_start);
token_start = buf_index;
} else if (buf[buf_index] == '<' && (ch = buf[buf_index + 1]) &&
(isalpha(ch) || strchr("/!?", ch)) ) {
/* Tag */
if (buf_index + 3 < bufsize && !strncmp(buf + buf_index, "<!--", 4)) {
/* Comment: search for close of comment, skipping over
* everything except a matching "-->" tag. */
while ( (p = (char*) memchr(buf + buf_index, '>',
bufsize - buf_index)) ){
buf_index = p - buf + 1;
if (p[-1] == '-' && p[-2] == '-') break;
}
if (p) {
/* Got the whole comment. Let's throw it away! :) */
token_start = buf_index;
} else
buf_index = bufsize;
} else {
/* Tag: search end of tag (skipping over quoted strings) */
html->CurrOfs = html->Start_Ofs + token_start;
while ( buf_index < bufsize ) {
buf_index++;
buf_index += strcspn(buf + buf_index, ">\"'<");
if ((ch = buf[buf_index]) == '>') {
break;
} else if (ch == '"' || ch == '\'') {
/* Skip over quoted string */
buf_index++;
buf_index += strcspn(buf + buf_index,
(ch == '"') ? "\">" : "'>");
if (buf[buf_index] == '>') {
/* Unterminated string value? Let's look ahead and test:
* (<: unterminated, closing-quote: terminated) */
int offset = buf_index + 1;
offset += strcspn(buf + offset,
(ch == '"') ? "\"<" : "'<");
if (buf[offset] == ch || !buf[offset]) {
buf_index = offset;
} else {
BUG_MSG("Attribute lacks closing quote.");
break;
}
}
} else if (ch == '<') {
/* unterminated tag detected */
p = dStrndup(buf+token_start+1,
strcspn(buf+token_start+1, " <\n\r\t"));
BUG_MSG("<%s> lacks its closing '>'.", p);
dFree(p);
--buf_index;
break;
}
}
if (buf_index < bufsize) {
buf_index++;
Html_process_tag(html, buf + token_start,
buf_index - token_start);
token_start = buf_index;
}
}
} else {
/* A Word: search for whitespace or tag open */
html->CurrOfs = html->Start_Ofs + token_start;
while (++buf_index < bufsize) {
buf_index += strcspn(buf + buf_index, " <\n\r\t\f\v");
if (buf[buf_index] == '<' && (ch = buf[buf_index + 1]) &&
!isalpha(ch) && !strchr("/!?", ch))
continue;
break;
}
if (buf_index < bufsize || Eof) {
/* successfully found end of token */
ch = buf[buf_index];
buf[buf_index] = 0;
Html_process_word(html, buf + token_start,
buf_index - token_start);
buf[buf_index] = ch;
token_start = buf_index;
}
}
}/*while*/
HT2TB(html)->flush ();
return token_start;
}