зеркало из https://github.com/mozilla/gecko-dev.git
363 строки
9.6 KiB
C
363 строки
9.6 KiB
C
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/*
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This is some glue code for a semi-parsing CSS. Its used to
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output html from XML.
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This will be changed when we incorporate the real xml parser
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from James Clark will replace this within the next few weeks.
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For more information on this file, contact rjc or guha
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For more information on RDF, look at the RDF section of www.mozilla.org
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For more info on XML in navigator, look at the XML section
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of www.mozilla.org.
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*/
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#include "xmlss.h"
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#define href "href"
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#define XLL "XML-Link"
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#define BUF_SIZE 4096
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int
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parseNextXMLCSSBlob (NET_StreamClass *stream, char* blob, int32 size)
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{
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StyleSheet ss;
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int32 n, last, m;
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PRBool somethingseenp = false;
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n = last = 0;
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ss = (StyleSheet)(stream->data_object);
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if ((ss == NULL) || (size < 0)) {
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return MK_INTERRUPTED;
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}
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while (n < size) {
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char c = blob[n];
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m = 0;
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memset(ss->line, '\0', ss->lineSize);
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if (ss->holdOver[0] != '\0') {
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memcpy(ss->line, ss->holdOver, strlen(ss->holdOver));
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m = strlen(ss->holdOver);
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somethingseenp = 1;
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memset(ss->holdOver, '\0', BUF_SIZE);
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}
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while ((m < 300) && (c != '{') && (c != '}')) {
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ss->line[m] = c;
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m++;
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somethingseenp = (somethingseenp || ((c != ' ') &&
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(c != '\r') && (c != '\n')));
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n++;
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if (n < size) {
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c = blob[n];
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} else break;
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}
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if (c == '}') ss->line[m] = c;
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n++;
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if (m > 0) {
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if ((c == '}') || (c == '{')) {
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last = n;
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if (c == '{') ss->holdOver[0] = '{';
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if (somethingseenp) {
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parseNextXMLCSSElement(ss, ss->line);
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}
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} else if (size > last) {
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memcpy(ss->holdOver, ss->line, m);
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}
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} else if (c == '{') ss->holdOver[0] = '{';
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}
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return(size);
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}
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static int32 style_id_counter = 0;
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void
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parseNextXMLCSSElement (StyleSheet ss, char* ele)
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{
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if (ele[0] == '{') {
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char* sty = getMem(strlen(ele)-1);
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memcpy(sty, &ele[1], strlen(ele)-2);
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ss->el->style = sty;
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} else {
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StyleElement se = (StyleElement) getMem(sizeof(StyleElementStruct));
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size_t numTags, size, n, count;
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se->id = ++style_id_counter;
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se->next = ss->el;
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ss->el = se;
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size = strlen(ele);
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count = n = 0;
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numTags = countTagStackSize(ele);
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while (count < numTags) {
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size_t st = 0;
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char** tgs = (char**) getMem(numTags * sizeof(char**));
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se->tagStack = tgs;
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while (st < numTags) {
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*(tgs + st++) = getNextSSTag(ele, &n);
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}
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count++;
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}
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}
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}
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size_t
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countSSNumTags (char* ele)
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{
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size_t n = 0;
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size_t m = 1;
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size_t sz = strlen(ele);
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while (n < sz) {
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if (ele[n++] == ',') m++;
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}
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return m;
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}
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size_t
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countTagStackSize (char* ele)
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{
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size_t n = 0;
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size_t m = 0;
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PRBool inSpace = 1;
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size_t sz = strlen(ele);
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while (n < sz) {
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if (ele[n] == ',') break;
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if ((ele[n] != ' ') && (ele[n] != '\r') && (ele[n] != '\n')) {
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if (inSpace) {
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m++;
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inSpace = 0;
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}
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} else inSpace = 1;
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n++;
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}
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return m;
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}
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char*
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getNextSSTag (char* ele, size_t* n)
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{
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char tag[100];
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size_t m = 0;
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char c = ele[*n];
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size_t s = strlen(ele);
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memset(tag, '\0', 100);
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while ((c == '\r') || (c == ' ') || (c == '\n')) {
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*n = *n + 1;
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c = ele[*n];
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}
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while ((c != ' ') && (c != ',') && (*n < s)) {
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tag[m++] = c;
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*n = *n + 1;
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c = ele[*n];
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}
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return copyString(tag);
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}
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void
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outputAttributes(XMLFile f, char** attlist)
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{
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uint32 n = 0;
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PRBool xmlinkp = (getAttributeValue(attlist, XLL) != NULL);
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if (!attlist) return ;
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while ((n < 2*MAX_ATTRIBUTES) && (*(attlist + n) != NULL)) {
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if (!(xmlinkp && stringEquals(*(attlist + n), href))) {
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outputToStream(f, *(attlist + n));
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outputToStream(f, "=\"");
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outputToStream(f, *(attlist + n + 1));
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outputToStream(f, "\" ");
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}
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n = n + 2;
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}
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}
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void
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outputAsHTML (XMLFile f, XMLElement el)
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{
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if (strcmp(el->tag, "xml:content") == 0) {
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outputToStream(f, el->content);
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} else {
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char* htmlEquiv = getAttributeValue(el->attributes, "html");
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char* linkTag = getAttributeValue(el->attributes, XLL);
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char* htmlBuff = getMem(1024);
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XMLElement child = el->child;
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PRBool suppressTag = !startsWith("html:", el->tag) ;
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if (linkTag && (stringEquals(linkTag, "LINK"))) {
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char* hrefVal = getAttributeValue(el->attributes, href);
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if (hrefVal) {
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char* type = getAttributeValue(el->attributes, "Role");
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char* show = getAttributeValue(el->attributes, "Show");
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if (show &&(strcmp(show, "EMBED") == 0)) {
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if (type && (strcmp(type, "HTML") == 0)) {
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int32 n = 0;
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XMLHTMLInclusion incl = (XMLHTMLInclusion) el->content;
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while (incl && *(incl->content + n)) {
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outputToStream(f, (*(incl->content + n)));
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n++;
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}
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} else if (type && (strcmp(type, "IMAGE") == 0)) {
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sprintf(htmlBuff, "<img src=%s>\n", hrefVal);
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outputToStream(f, htmlBuff);
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}
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freeMem(htmlBuff);
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return;
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} else {
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sprintf(htmlBuff, "<a href=\"%s\">", hrefVal);
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outputToStream(f, htmlBuff);
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}
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} else {
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linkTag = 0;
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}
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}
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outputStyleSpan(f, el, 0);
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if (htmlEquiv) {
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sprintf(htmlBuff, "<%s ", htmlEquiv);
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outputToStream(f, htmlBuff);
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outputAttributes(f, el->attributes);
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outputToStream(f, ">\n");
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} else if (!suppressTag){
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sprintf(htmlBuff, "<%s ", &((el->tag)[5]));
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outputToStream(f, htmlBuff);
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outputAttributes(f, el->attributes);
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outputToStream(f, ">\n");
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}
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while (child) {
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outputAsHTML(f, child);
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child = child->next;
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}
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if (htmlEquiv) {
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sprintf(htmlBuff, "</%s>\n", htmlEquiv);
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outputToStream(f, htmlBuff);
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} else if (!suppressTag) {
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sprintf(htmlBuff, "</%s>\n", &((el->tag)[5]));
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outputToStream(f, htmlBuff);
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}
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outputStyleSpan(f, el, 1);
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if (linkTag) outputToStream(f, "</a>");
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freeMem(htmlBuff);
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}
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}
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void
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outputAllStyles(XMLFile xf)
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{
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char *ssline;
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StyleSheet ss ;
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StyleElement se;
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outputToStream(xf, "<style>\n");
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for (ss = xf->ss; (ss != NULL) ; ss = ss->next) {
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for (se = ss->el; (se != NULL) ; se = se->next) {
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if (se->style) {
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ssline = PR_smprintf(".xml%d {%s}\n", se->id, se->style);
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PR_ASSERT(ssline);
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if (!ssline)
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return;
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outputToStream(xf, ssline);
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free(ssline);
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}
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}
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}
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outputToStream(xf, "</style>\n");
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}
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void
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convertToHTML (XMLFile xf) {
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XMLElement el = xf->top;
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xf->numOpenStreams--;
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if (xf->numOpenStreams < 1) {
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outputToStream(xf, "<html><body>");
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outputAllStyles(xf);
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outputAsHTML(xf, el);
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outputToStream(xf, "</body></html>");
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}
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}
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void
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outputStyleSpan (XMLFile f, XMLElement el, PRBool endp)
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{
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char *ssid;
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StyleSheet ss ;
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StyleElement se;
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for (ss = f->ss; (ss != NULL) ; ss = ss->next) {
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for (se = ss->el; (se != NULL) ; se = se->next) {
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if (se->style && stringEquals((se->tagStack)[0], el->tag)) {
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/* check for se->style from Steve Wingard <swingard@spyglass.com> */
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PRBool divp = startsWith("Display:Block;", se->style);
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PRBool listp = startsWith("Display:List-item;", se->style);
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if (!endp) {
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if (divp) {
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outputToStream(f, "<div ");
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} else if (listp) {
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outputToStream(f, "<UL><LI><span ");
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} else {
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outputToStream(f, "<span ");
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}
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ssid=PR_smprintf("class=xml%d>\n", se->id);
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PR_ASSERT(ssid);
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if (!ssid)
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return;
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outputToStream(f, ssid);
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free(ssid);
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} else {
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if (divp) {
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outputToStream(f, "</div>");
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} else if (listp) {
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outputToStream(f, "</UL></span>");
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} else {
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outputToStream(f, "</span>");
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}
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}
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}
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}
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}
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}
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