/*
** Copyright (c) 2007 D. Richard Hipp
**
** This program is free software; you can redistribute it and/or
** modify it under the terms of the GNU General Public
** License version 2 as published by the Free Software Foundation.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
** General Public License for more details.
**
** You should have received a copy of the GNU General Public
** License along with this library; if not, write to the
** Free Software Foundation, Inc., 59 Temple Place - Suite 330,
** Boston, MA 02111-1307, USA.
**
** Author contact information:
** drh@hwaci.com
** http://www.hwaci.com/drh/
**
*******************************************************************************
**
** This file contains code to do formatting of wiki text.
*/
#include <assert.h>
#include "config.h"
#include "wikiformat.h"
#if INTERFACE
/*
** Allowed wiki transformation operations
*/
#define WIKI_NOFOLLOW 0x001
#define WIKI_HTML 0x002
#define WIKI_INLINE 0x004 /* Do not surround with <p>..</p> */
#define WIKI_NOBLOCK 0x008 /* No block markup of any kind */
#endif
/*
** These are the only markup attributes allowed.
*/
#define ATTR_ALIGN 1
#define ATTR_ALT 2
#define ATTR_BGCOLOR 3
#define ATTR_BORDER 4
#define ATTR_CELLPADDING 5
#define ATTR_CELLSPACING 6
#define ATTR_CLEAR 7
#define ATTR_COLOR 8
#define ATTR_COLSPAN 9
#define ATTR_COMPACT 10
#define ATTR_FACE 11
#define ATTR_HEIGHT 12
#define ATTR_HREF 13
#define ATTR_HSPACE 14
#define ATTR_ID 15
#define ATTR_NAME 16
#define ATTR_ROWSPAN 17
#define ATTR_SIZE 18
#define ATTR_SRC 19
#define ATTR_START 20
#define ATTR_TYPE 21
#define ATTR_VALIGN 22
#define ATTR_VALUE 23
#define ATTR_VSPACE 24
#define ATTR_WIDTH 25
#define AMSK_ALIGN 0x0000001
#define AMSK_ALT 0x0000002
#define AMSK_BGCOLOR 0x0000004
#define AMSK_BORDER 0x0000008
#define AMSK_CELLPADDING 0x0000010
#define AMSK_CELLSPACING 0x0000020
#define AMSK_CLEAR 0x0000040
#define AMSK_COLOR 0x0000080
#define AMSK_COLSPAN 0x0000100
#define AMSK_COMPACT 0x0000200
#define AMSK_FACE 0x0000400
#define AMSK_HEIGHT 0x0000800
#define AMSK_HREF 0x0001000
#define AMSK_HSPACE 0x0002000
#define AMSK_ID 0x0004000
#define AMSK_NAME 0x0008000
#define AMSK_ROWSPAN 0x0010000
#define AMSK_SIZE 0x0020000
#define AMSK_SRC 0x0040000
#define AMSK_START 0x0080000
#define AMSK_TYPE 0x0100000
#define AMSK_VALIGN 0x0200000
#define AMSK_VALUE 0x0400000
#define AMSK_VSPACE 0x0800000
#define AMSK_WIDTH 0x1000000
static const struct AllowedAttribute {
const char *zName;
unsigned int iMask;
} aAttribute[] = {
{ 0, 0 },
{ "align", AMSK_ALIGN, },
{ "alt", AMSK_ALT, },
{ "bgcolor", AMSK_BGCOLOR, },
{ "border", AMSK_BORDER, },
{ "cellpadding", AMSK_CELLPADDING, },
{ "cellspacing", AMSK_CELLSPACING, },
{ "clear", AMSK_CLEAR, },
{ "color", AMSK_COLOR, },
{ "colspan", AMSK_COLSPAN, },
{ "compact", AMSK_COMPACT, },
{ "face", AMSK_FACE, },
{ "height", AMSK_HEIGHT, },
{ "href", AMSK_HREF, },
{ "hspace", AMSK_HSPACE, },
{ "id", AMSK_ID, },
{ "name", AMSK_NAME, },
{ "rowspan", AMSK_ROWSPAN, },
{ "size", AMSK_SIZE, },
{ "src", AMSK_SRC, },
{ "start", AMSK_START, },
{ "type", AMSK_TYPE, },
{ "valign", AMSK_VALIGN, },
{ "value", AMSK_VALUE, },
{ "vspace", AMSK_VSPACE, },
{ "width", AMSK_WIDTH, },
};
/*
** Use binary search to locate a tag in the aAttribute[] table.
*/
static int findAttr(const char *z){
int i, c, first, last;
first = 1;
last = sizeof(aAttribute)/sizeof(aAttribute[0]) - 1;
while( first<=last ){
i = (first+last)/2;
c = strcmp(aAttribute[i].zName, z);
if( c==0 ){
return i;
}else if( c<0 ){
first = i+1;
}else{
last = i-1;
}
}
return 0;
}
/*
** Allowed markup.
**
** Except for MARKUP_INVALID, this must all be in alphabetical order
** and in numerical sequence. The first markup type must be zero.
** The value for MARKUP_XYZ must correspond to the <xyz> entry
** in aAllowedMarkup[].
*/
#define MARKUP_INVALID 0
#define MARKUP_A 1
#define MARKUP_ADDRESS 2
#define MARKUP_B 3
#define MARKUP_BIG 4
#define MARKUP_BLOCKQUOTE 5
#define MARKUP_BR 6
#define MARKUP_CENTER 7
#define MARKUP_CITE 8
#define MARKUP_CODE 9
#define MARKUP_DD 10
#define MARKUP_DFN 11
#define MARKUP_DIV 12
#define MARKUP_DL 13
#define MARKUP_DT 14
#define MARKUP_EM 15
#define MARKUP_FONT 16
#define MARKUP_H1 17
#define MARKUP_H2 18
#define MARKUP_H3 19
#define MARKUP_H4 20
#define MARKUP_H5 21
#define MARKUP_H6 22
#define MARKUP_HR 23
#define MARKUP_I 24
#define MARKUP_IMG 25
#define MARKUP_KBD 26
#define MARKUP_LI 27
#define MARKUP_NOBR 28
#define MARKUP_NOWIKI 29
#define MARKUP_OL 30
#define MARKUP_P 31
#define MARKUP_PRE 32
#define MARKUP_S 33
#define MARKUP_SAMP 34
#define MARKUP_SMALL 35
#define MARKUP_STRIKE 36
#define MARKUP_STRONG 37
#define MARKUP_SUB 38
#define MARKUP_SUP 39
#define MARKUP_TABLE 40
#define MARKUP_TD 41
#define MARKUP_TH 42
#define MARKUP_TR 43
#define MARKUP_TT 44
#define MARKUP_U 45
#define MARKUP_UL 46
#define MARKUP_VAR 47
#define MARKUP_VERBATIM 48
/*
** The various markup is divided into the following types:
*/
#define MUTYPE_SINGLE 0x0001 /* <img>, <br>, or <hr> */
#define MUTYPE_BLOCK 0x0002 /* Forms a new paragraph. ex: <p>, <h2> */
#define MUTYPE_FONT 0x0004 /* Font changes. ex: <b>, <font>, <sub> */
#define MUTYPE_LIST 0x0010 /* Lists. <ol>, <ul>, or <dl> */
#define MUTYPE_LI 0x0020 /* List items. <li>, <dd>, <dt> */
#define MUTYPE_TABLE 0x0040 /* <table> */
#define MUTYPE_TR 0x0080 /* <tr> */
#define MUTYPE_TD 0x0100 /* <td> or <th> */
#define MUTYPE_SPECIAL 0x0200 /* <nowiki> or <verbatim> */
#define MUTYPE_HYPERLINK 0x0400 /* <a> */
/*
** These markup types must have an end tag.
*/
#define MUTYPE_STACK (MUTYPE_BLOCK | MUTYPE_FONT | MUTYPE_LIST | MUTYPE_TABLE)
/*
** This markup types are allowed for "inline" text.
*/
#define MUTYPE_INLINE (MUTYPE_FONT | MUTYPE_HYPERLINK)
static const struct AllowedMarkup {
const char *zName; /* Name of the markup */
char iCode; /* The MARKUP_* code */
short int iType; /* The MUTYPE_* code */
int allowedAttr; /* Allowed attributes on this markup */
} aMarkup[] = {
{ 0, MARKUP_INVALID, 0, 0 },
{ "a", MARKUP_A, MUTYPE_HYPERLINK,
AMSK_HREF|AMSK_NAME },
{ "address", MARKUP_ADDRESS, MUTYPE_BLOCK, 0 },
{ "b", MARKUP_B, MUTYPE_FONT, 0 },
{ "big", MARKUP_BIG, MUTYPE_FONT, 0 },
{ "blockquote", MARKUP_BLOCKQUOTE, MUTYPE_BLOCK, 0 },
{ "br", MARKUP_BR, MUTYPE_SINGLE, AMSK_CLEAR },
{ "center", MARKUP_CENTER, MUTYPE_BLOCK, 0 },
{ "cite", MARKUP_CITE, MUTYPE_FONT, 0 },
{ "code", MARKUP_CODE, MUTYPE_FONT, 0 },
{ "dd", MARKUP_DD, MUTYPE_LI, 0 },
{ "dfn", MARKUP_DFN, MUTYPE_FONT, 0 },
{ "div", MARKUP_DIV, MUTYPE_BLOCK, AMSK_ID },
{ "dl", MARKUP_DL, MUTYPE_LIST, AMSK_COMPACT },
{ "dt", MARKUP_DT, MUTYPE_LI, 0 },
{ "em", MARKUP_EM, MUTYPE_FONT, 0 },
{ "font", MARKUP_FONT, MUTYPE_FONT,
AMSK_COLOR|AMSK_FACE|AMSK_SIZE },
{ "h1", MARKUP_H1, MUTYPE_BLOCK, AMSK_ALIGN },
{ "h2", MARKUP_H2, MUTYPE_BLOCK, AMSK_ALIGN },
{ "h3", MARKUP_H3, MUTYPE_BLOCK, AMSK_ALIGN },
{ "h4", MARKUP_H4, MUTYPE_BLOCK, AMSK_ALIGN },
{ "h5", MARKUP_H5, MUTYPE_BLOCK, AMSK_ALIGN },
{ "h6", MARKUP_H6, MUTYPE_BLOCK, AMSK_ALIGN },
{ "hr", MARKUP_HR, MUTYPE_SINGLE,
AMSK_ALIGN|AMSK_COLOR|AMSK_SIZE|AMSK_WIDTH },
{ "i", MARKUP_I, MUTYPE_FONT, 0 },
{ "img", MARKUP_IMG, MUTYPE_SINGLE,
AMSK_ALIGN|AMSK_ALT|AMSK_BORDER|AMSK_HEIGHT|
AMSK_HSPACE|AMSK_SRC|AMSK_VSPACE|AMSK_WIDTH },
{ "kbd", MARKUP_KBD, MUTYPE_FONT, 0 },
{ "li", MARKUP_LI, MUTYPE_LI,
AMSK_TYPE|AMSK_VALUE },
{ "nobr", MARKUP_NOBR, MUTYPE_FONT, 0 },
{ "nowiki", MARKUP_NOWIKI, MUTYPE_SPECIAL, 0 },
{ "ol", MARKUP_OL, MUTYPE_LIST,
AMSK_START|AMSK_TYPE|AMSK_COMPACT },
{ "p", MARKUP_P, MUTYPE_BLOCK, AMSK_ALIGN },
{ "pre", MARKUP_PRE, MUTYPE_BLOCK, 0 },
{ "s", MARKUP_S, MUTYPE_FONT, 0 },
{ "samp", MARKUP_SAMP, MUTYPE_FONT, 0 },
{ "small", MARKUP_SMALL, MUTYPE_FONT, 0 },
{ "strike", MARKUP_STRIKE, MUTYPE_FONT, 0 },
{ "strong", MARKUP_STRONG, MUTYPE_FONT, 0 },
{ "sub", MARKUP_SUB, MUTYPE_FONT, 0 },
{ "sup", MARKUP_SUP, MUTYPE_FONT, 0 },
{ "table", MARKUP_TABLE, MUTYPE_TABLE,
AMSK_ALIGN|AMSK_BGCOLOR|AMSK_BORDER|AMSK_CELLPADDING|
AMSK_CELLSPACING|AMSK_HSPACE|AMSK_VSPACE },
{ "td", MARKUP_TD, MUTYPE_TD,
AMSK_ALIGN|AMSK_BGCOLOR|AMSK_COLSPAN|
AMSK_ROWSPAN|AMSK_VALIGN },
{ "th", MARKUP_TH, MUTYPE_TD,
AMSK_ALIGN|AMSK_BGCOLOR|AMSK_COLSPAN|
AMSK_ROWSPAN|AMSK_VALIGN },
{ "tr", MARKUP_TR, MUTYPE_TR,
AMSK_ALIGN|AMSK_BGCOLOR||AMSK_VALIGN },
{ "tt", MARKUP_TT, MUTYPE_FONT, 0 },
{ "u", MARKUP_U, MUTYPE_FONT, 0 },
{ "ul", MARKUP_UL, MUTYPE_LIST,
AMSK_TYPE|AMSK_COMPACT },
{ "var", MARKUP_VAR, MUTYPE_FONT, 0 },
{ "verbatim", MARKUP_VERBATIM, MUTYPE_SPECIAL, AMSK_ID },
};
/*
** Use binary search to locate a tag in the aMarkup[] table.
*/
static int findTag(const char *z){
int i, c, first, last;
first = 1;
last = sizeof(aMarkup)/sizeof(aMarkup[0]) - 1;
while( first<=last ){
i = (first+last)/2;
c = strcmp(aMarkup[i].zName, z);
if( c==0 ){
assert( aMarkup[i].iCode==i );
return i;
}else if( c<0 ){
first = i+1;
}else{
last = i-1;
}
}
return MARKUP_INVALID;
}
/*
** Token types
*/
#define TOKEN_MARKUP 1 /* <...> */
#define TOKEN_CHARACTER 2 /* "&" or "<" not part of markup */
#define TOKEN_LINK 3 /* [...] */
#define TOKEN_PARAGRAPH 4 /* blank lines */
#define TOKEN_NEWLINE 5 /* A single "\n" */
#define TOKEN_BULLET 6 /* " * " */
#define TOKEN_ENUM 7 /* " \(?\d+[.)]? " */
#define TOKEN_INDENT 8 /* " " */
#define TOKEN_TEXT 9 /* None of the above */
/*
** State flags
*/
#define AT_NEWLINE 0x001 /* At start of a line */
#define AT_PARAGRAPH 0x002 /* At start of a paragraph */
#define ALLOW_WIKI 0x004 /* Allow wiki markup */
#define FONT_MARKUP_ONLY 0x008 /* Only allow MUTYPE_FONT markup */
#define INLINE_MARKUP_ONLY 0x010 /* Allow only "inline" markup */
#define IN_LIST 0x020 /* Within wiki <ul> or <ol> */
/*
** Current state of the rendering engine
*/
typedef struct Renderer Renderer;
struct Renderer {
Blob *pOut; /* Output appended to this blob */
int state; /* Flag that govern rendering */
int wikiList; /* Current wiki list type */
int inVerbatim; /* True in <verbatim> mode */
int preVerbState; /* Value of state prior to verbatim */
int wantAutoParagraph; /* True if a <p> is desired */
int inAutoParagraph; /* True if within an automatic paragraph */
const char *zVerbatimId; /* The id= attribute of <verbatim> */
int nStack; /* Number of elements on the stack */
int nAlloc; /* Space allocated for aStack */
struct sStack {
short iCode; /* Markup code */
short allowWiki; /* ALLOW_WIKI if wiki allowed before tag */
const char *zId; /* ID attribute or NULL */
} *aStack;
};
/*
** z points to a "<" character. Check to see if this is the start of
** a valid markup. If it is, return the total number of characters in
** the markup including the initial "<" and the terminating ">". If
** it is not well-formed markup, return 0.
*/
static int markupLength(const char *z){
int n = 1;
int inparen = 0;
if( z[n]=='/' ){ n++; }
if( !isalpha(z[n]) ) return 0;
while( isalnum(z[n]) ){ n++; }
if( z[n]!='>' && !isspace(z[n]) ) return 0;
while( z[n] && (z[n]!='>' || inparen) ){
if( z[n]=='"' ){
inparen = !inparen;
}
n++;
}
if( z[n]!='>' ) return 0;
return n+1;
}
/*
** z points to a "\n" character. Check to see if this newline is
** followed by one or more blank lines. If it is, return the number
** of characters through the closing "\n". If not, return 0.
*/
static int paragraphBreakLength(const char *z){
int i, n;
int nNewline = 1;
for(i=1, n=0; isspace(z[i]); i++){
if( z[i]=='\n' ){
nNewline++;
n = i;
}
}
if( nNewline>=2 ){
return n+1;
}else{
return 0;
}
}
/*
** Return the number of characters until the next "interesting"
** characters.
**
** Interesting characters are:
**
** <
** &
** \n
** [
**
** The "[" and "\n" are only considered interesting if the "useWiki"
** flag is set.
*/
static int textLength(const char *z, int useWiki){
int n = 0;
int c;
while( (c = z[0])!=0 && c!='<' && c!='&' &&
(useWiki==0 || (c!='[' && c!='\n')) ){
n++;
z++;
}
return n;
}
/*
** Return true if z[] begins with an HTML character element.
*/
static int isElement(const char *z){
int i;
assert( z[0]=='&' );
if( z[1]=='#' ){
for(i=2; isdigit(z[i]); i++){}
return i>2 && z[i]==';';
}else{
for(i=1; isalpha(z[i]); i++){}
return i>1 && z[i]==';';
}
}
/*
** Check to see if the z[] string is the beginning of a wiki bullet.
** If it is, return the length of the bullet text. Otherwise return 0.
*/
static int bulletLength(const char *z){
int i, n;
n = 0;
i = 0;
while( z[n]==' ' || z[n]=='\t' ){
if( z[n]=='\t' ) i++;
i++;
n++;
}
if( i<2 || z[n]!='*' ) return 0;
n++;
i = 0;
while( z[n]==' ' || z[n]=='\t' ){
if( z[n]=='\t' ) i++;
i++;
n++;
}
if( i<2 || isspace(z[n]) ) return 0;
return n;
}
/*
** Check to see if the z[] string is the beginning of a enumeration value.
** If it is, return the length of the bullet text. Otherwise return 0.
**
** Syntax:
** * a tab or two or more spaces
** * one or more digits
** * optional "."
** * another tab or two ore more spaces.
**
*/
static int enumLength(const char *z){
int i, n;
n = 0;
i = 0;
while( z[n]==' ' || z[n]=='\t' ){
if( z[n]=='\t' ) i++;
i++;
n++;
}
if( i<2 ) return 0;
for(i=0; isdigit(z[n]); i++, n++){}
if( i==0 ) return 0;
if( z[n]=='.' ){
n++;
}
i = 0;
while( z[n]==' ' || z[n]=='\t' ){
if( z[n]=='\t' ) i++;
i++;
n++;
}
if( i<2 || isspace(z[n]) ) return 0;
return n;
}
/*
** Check to see if the z[] string is the beginning of an indented
** paragraph. If it is, return the length of the indent. Otherwise
** return 0.
*/
static int indentLength(const char *z){
int i, n;
n = 0;
i = 0;
while( z[n]==' ' || z[n]=='\t' ){
if( z[n]=='\t' ) i++;
i++;
n++;
}
if( i<2 || isspace(z[n]) ) return 0;
return n;
}
/*
** Check to see if the z[] string is a wiki hyperlink. If it is,
** return the length of the hyperlink. Otherwise return 0.
*/
static int linkLength(const char *z){
int n;
assert( z[0]=='[' );
for(n=0; z[n] && z[n]!=']'; n++){}
if( z[n]==']' ){
return n+1;
}else{
return 0;
}
}
/*
** z points to the start of a token. Return the number of
** characters in that token. Write the token type into *pTokenType.
*/
static int nextToken(const char *z, Renderer *p, int *pTokenType){
int n;
if( z[0]=='<' ){
n = markupLength(z);
if( n>0 ){
*pTokenType = TOKEN_MARKUP;
return n;
}else{
*pTokenType = TOKEN_CHARACTER;
return 1;
}
}
if( z[0]=='&' && (p->inVerbatim || !isElement(z)) ){
*pTokenType = TOKEN_CHARACTER;
return 1;
}
if( (p->state & ALLOW_WIKI)!=0 ){
if( z[0]=='\n' ){
n = paragraphBreakLength(z);
if( n>0 ){
*pTokenType = TOKEN_PARAGRAPH;
return n;
}else if( isspace(z[1]) ){
*pTokenType = TOKEN_NEWLINE;
return 1;
}
}
if( (p->state & AT_NEWLINE)!=0 && isspace(z[0]) ){
n = bulletLength(z);
if( n>0 ){
*pTokenType = TOKEN_BULLET;
return n;
}
n = enumLength(z);
if( n>0 ){
*pTokenType = TOKEN_ENUM;
return n;
}
}
if( (p->state & AT_PARAGRAPH)!=0 && isspace(z[0]) ){
n = indentLength(z);
if( n>0 ){
*pTokenType = TOKEN_INDENT;
return n;
}
}
if( z[0]=='[' && (n = linkLength(z))>0 ){
*pTokenType = TOKEN_LINK;
return n;
}
}
*pTokenType = TOKEN_TEXT;
return 1 + textLength(z+1, p->state & ALLOW_WIKI);
}
/*
** A single markup is parsed into an instance of the following
** structure.
*/
typedef struct ParsedMarkup ParsedMarkup;
struct ParsedMarkup {
unsigned char endTag; /* True if </...> instead of <...> */
unsigned char iCode; /* MARKUP_* */
unsigned char nAttr; /* Number of attributes */
unsigned short iType; /* MUTYPE_* */
struct {
unsigned char iACode; /* ATTR_* */
char *zValue; /* Argument to this attribute. Might be NULL */
char cTerm; /* Original argument termination character */
} aAttr[10];
};
/*
** z[] is an HTML markup element - something that begins with '<'.
** Parse this element into the p structure.
**
** The content of z[] might be modified by converting characters
** to lowercase and by inserting some "\000" characters.
*/
static void parseMarkup(ParsedMarkup *p, char *z){
int i, j, c;
int iACode;
char *zValue;
int seen = 0;
char zTag[100];
if( z[1]=='/' ){
p->endTag = 1;
i = 2;
}else{
p->endTag = 0;
i = 1;
}
j = 0;
while( isalnum(z[i]) ){
if( j<sizeof(zTag)-1 ) zTag[j++] = tolower(z[i]);
i++;
}
zTag[j] = 0;
p->iCode = findTag(zTag);
p->iType = aMarkup[p->iCode].iType;
p->nAttr = 0;
while( isspace(z[i]) ){ i++; }
while( p->nAttr<8 && isalpha(z[i]) ){
int attrOk; /* True to preserver attribute. False to ignore it */
j = 0;
while( isalnum(z[i]) ){
if( j<sizeof(zTag)-1 ) zTag[j++] = tolower(z[i]);
i++;
}
zTag[j] = 0;
p->aAttr[p->nAttr].iACode = iACode = findAttr(zTag);
attrOk = iACode!=0 && (seen & aAttribute[iACode].iMask)==0;
while( isspace(z[i]) ){ z++; }
if( z[i]!='=' ){
p->aAttr[p->nAttr].zValue = 0;
p->aAttr[p->nAttr].cTerm = 0;
c = 0;
}else{
i++;
while( isspace(z[i]) ){ z++; }
if( z[i]=='"' ){
i++;
zValue = &z[i];
while( z[i] && z[i]!='"' ){ i++; }
}else{
zValue = &z[i];
while( !isspace(z[i]) && z[i]!='>' ){ z++; }
}
if( attrOk ){
p->aAttr[p->nAttr].zValue = zValue;
p->aAttr[p->nAttr].cTerm = c = z[i];
z[i] = 0;
}
i++;
}
if( attrOk ){
seen |= aAttribute[iACode].iMask;
p->nAttr++;
}
while( isspace(z[i]) ){ i++; }
if( z[i]=='>' || (z[i]=='/' && z[i+1]=='>') ) break;
}
}
/*
** Render markup on the given blob.
*/
static void renderMarkup(Blob *pOut, ParsedMarkup *p){
int i;
if( p->endTag ){
blob_appendf(pOut, "</%s>", aMarkup[p->iCode].zName);
}else{
blob_appendf(pOut, "<%s", aMarkup[p->iCode].zName);
for(i=0; i<p->nAttr; i++){
blob_appendf(pOut, " %s", aAttribute[p->aAttr[i].iACode].zName);
if( p->aAttr[i].zValue ){
blob_appendf(pOut, "=\"%s\"", p->aAttr[i].zValue);
}
}
blob_append(pOut, ">", 1);
}
}
/*
** When the markup was parsed, some "\000" may have been inserted.
** This routine restores to those "\000" values back to their
** original content.
*/
static void unparseMarkup(ParsedMarkup *p){
int i, n;
for(i=0; i<p->nAttr; i++){
char *z = p->aAttr[i].zValue;
if( z==0 ) continue;
n = strlen(z);
z[n] = p->aAttr[i].cTerm;
}
}
/*
** Return the ID attribute for markup. Return NULL if there is no
** ID attribute.
*/
static const char *markupId(ParsedMarkup *p){
int i;
for(i=0; i<p->nAttr; i++){
if( p->aAttr[i].iACode==ATTR_ID ){
return p->aAttr[i].zValue;
}
}
return 0;
}
/*
** Pop a single element off of the stack. As the element is popped,
** output its end tag if it is not a </div> tag.
*/
static void popStack(Renderer *p){
if( p->nStack ){
int iCode;
p->nStack--;
iCode = p->aStack[p->nStack].iCode;
if( iCode!=MARKUP_DIV ){
blob_appendf(p->pOut, "</%s>", aMarkup[iCode].zName);
}
}
}
/*
** Push a new markup value onto the stack. Enlarge the stack
** if necessary.
*/
static void pushStackWithId(Renderer *p, int elem, const char *zId, int w){
if( p->nStack>=p->nAlloc ){
p->nAlloc = p->nAlloc*2 + 100;
p->aStack = realloc(p->aStack, p->nAlloc*sizeof(p->aStack[0]));
if( p->aStack==0 ){
fossil_panic("out of memory");
}
}
p->aStack[p->nStack].iCode = elem;
p->aStack[p->nStack].zId = zId;
p->aStack[p->nStack].allowWiki = w;
p->nStack++;
}
static void pushStack(Renderer *p, int elem){
pushStackWithId(p, elem, 0, 0);
}
/*
** Pop the stack until the top-most iTag element is removed.
** If there is no iTag element on the stack, this routine
** is a no-op.
*/
static void popStackToTag(Renderer *p, int iTag){
int i;
for(i=p->nStack-1; i>=0; i--){
if( p->aStack[i].iCode!=iTag ) continue;
if( p->aStack[i].zId ) continue;
break;
}
if( i<0 ) return;
while( p->nStack>i ){
popStack(p);
}
}
/*
** Attempt to find a find a tag of type iTag with id zId. Return -1
** if not found. If found, return its stack level.
*/
static int findTagWithId(Renderer *p, int iTag, const char *zId){
int i;
assert( zId!=0 );
for(i=p->nStack-1; i>=0; i--){
if( p->aStack[i].iCode!=iTag ) continue;
if( p->aStack[i].zId==0 ) continue;
if( strcmp(zId, p->aStack[i].zId)!=0 ) continue;
break;
}
return i;
}
/*
** Pop the stack until the top-most element of the stack
** is an element that matches the type in iMask. Return
** code of the markup element that is on left on top of the stack.
** If the stack does not have an element
** that matches iMask, then leave the stack unchanged and
** return false (MARKUP_INVALID).
*/
static int backupToType(Renderer *p, int iMask){
int i;
for(i=p->nStack-1; i>=0; i--){
if( aMarkup[p->aStack[i].iCode].iType & iMask ) break;
}
if( i<0 ) return 0;
i++;
while( p->nStack>i ){
popStack(p);
}
return p->aStack[i-1].iCode;
}
/*
** Begin a new paragraph if that something that is needed.
*/
static void startAutoParagraph(Renderer *p){
if( p->wantAutoParagraph==0 ) return;
blob_appendf(p->pOut, "<p>", -1);
pushStack(p, MARKUP_P);
p->wantAutoParagraph = 0;
p->inAutoParagraph = 1;
}
/*
** End a paragraph if we are in one.
*/
static void endAutoParagraph(Renderer *p){
if( p->inAutoParagraph ){
popStackToTag(p, MARKUP_P);
p->inAutoParagraph = 0;
}
}
/*
** If the input string corresponds to an existing baseline,
** return true.
*/
static int is_valid_uuid(const char *z){
int n = strlen(z);
if( n<4 || n>UUID_SIZE ) return 0;
if( !validate16(z, n) ) return 0;
return 1;
}
/*
** zTarget is guaranteed to be a UUID. It might be the UUID of a ticket.
** If it is, fill zDisplay[0..nDisplay-1] with the title of the ticket
** (or a prefix if the title is too long) and return true. If zTarget
** is not the UUID of a ticket, return false.
*/
static int is_ticket(
const char *zTarget, /* Ticket UUID */
char *zDisplay, /* Space in which to write ticket title */
int nDisplay, /* Bytes available in zDisplay[] */
int *pClosed /* True if the ticket is closed */
){
static Stmt q;
static int once = 1;
int n;
int rc;
char zLower[UUID_SIZE+1];
char zUpper[UUID_SIZE+1];
n = strlen(zTarget);
memcpy(zLower, zTarget, n+1);
canonical16(zLower, n+1);
memcpy(zUpper, zLower, n+1);
zUpper[n-1]++;
if( once ){
const char *zTitleExpr = db_get("ticket-title-expr", "title");
const char *zClosedExpr = db_get("ticket-closed-expr", "status='Closed'");
db_static_prepare(&q,
"SELECT %s, %s FROM ticket "
" WHERE tkt_uuid>=:lwr AND tkt_uuid<:upr",
zTitleExpr, zClosedExpr
);
}
db_bind_text(&q, ":lwr", zLower);
db_bind_text(&q, ":upr", zUpper);
if( db_step(&q)==SQLITE_ROW ){
n = db_column_bytes(&q,0);
if( n>nDisplay-1 ) n = nDisplay - 1;
memcpy(zDisplay, db_column_text(&q, 0), n);
zDisplay[n] = 0;
rc = 1;
*pClosed = db_column_int(&q, 1);
}else{
rc = 0;
}
db_reset(&q);
return rc;
}
/*
** Resolve a hyperlink. The zTarget argument is the content of the [...]
** in the wiki. Append an <a> markup to the output of the Renderer.
**
** Actually, this routine might or might not append the hyperlink, depending
** on current rendering rules: specifically does the current user have
** "History" permission. If this routine does append the <a> and thus needs
** a </a> to follow, it returns true. If the <a> is suppressed, then return
** false.
**
** If nDisplay>0 then optionally write up to nDisplay bytes of
** alternative display text into zDisplay. The text must be zero
** terminated. The final zero is included in the nDisplay byte count
** limit.
*/
static int resolveHyperlink(
Renderer *p, /* Rendering context */
const char *zTarget, /* Hyperlink traget; text within [...] */
char *zDisplay, /* Space in which to write alternative display */
int nDisplay /* Bytes available in zDisplay[] */
){
int rc = 0;
if( strncmp(zTarget, "http:", 5)==0
|| strncmp(zTarget, "https:", 6)==0
|| strncmp(zTarget, "ftp:", 4)==0
|| strncmp(zTarget, "mailto:", 7)==0
){
blob_appendf(p->pOut, "<a href=\"%s\">", zTarget);
rc = 1;
}else if( zTarget[0]=='/' ){
if( g.okHistory ){
blob_appendf(p->pOut, "<a href=\"%s%h\">", g.zBaseURL, zTarget);
rc = 1;
}
}else if( is_valid_uuid(zTarget) ){
int isClosed;
if( nDisplay && is_ticket(zTarget, zDisplay, nDisplay, &isClosed) ){
/* Special display processing for tickets. Display the hyperlink
** as crossed out if the ticket is closed. Add the title after the
** hyperlink.
*/
if( isClosed ){
if( g.okHistory ){
blob_appendf(p->pOut,"<a href=\"%s/info/%s\">[<s>%s</s>]</a>: %s",
g.zBaseURL, zTarget, zTarget, zDisplay
);
}else{
blob_appendf(p->pOut,"[<s>%s</s>]: %s", zTarget, zDisplay);
}
}else{
if( g.okHistory ){
blob_appendf(p->pOut,"<a href=\"%s/info/%s\">[%s]</a>: %s",
g.zBaseURL, zTarget, zTarget, zDisplay
);
}else{
blob_appendf(p->pOut,"[%s]: %s", zTarget, zDisplay);
}
}
zDisplay[0] = ' ';
zDisplay[1] = 0;
rc = 0;
}else if( g.okHistory ){
blob_appendf(p->pOut, "<a href=\"%s/info/%s\">", g.zBaseURL, zTarget);
rc = 1;
}
}else if( wiki_name_is_wellformed(zTarget) ){
blob_appendf(p->pOut, "<a href=\"%s/wiki?name=%T\">", g.zBaseURL, zTarget);
rc = 1;
}else{
blob_appendf(p->pOut, "[bad-link: %h]", zTarget);
rc = 0;
}
return rc;
}
/*
** Check to see if the given parsed markup is the correct
** </verbatim> tag.
*/
static int endVerbatim(Renderer *p, ParsedMarkup *pMarkup){
char *z;
assert( p->inVerbatim );
if( pMarkup->iCode!=MARKUP_VERBATIM ) return 0;
if( !pMarkup->endTag ) return 0;
if( p->zVerbatimId==0 ) return 1;
if( pMarkup->nAttr!=1 ) return 0;
z = pMarkup->aAttr[0].zValue;
return strcmp(z, p->zVerbatimId)==0;
}
/*
** Return the MUTYPE for the top of the stack.
*/
static int stackTopType(Renderer *p){
if( p->nStack<=0 ) return 0;
return aMarkup[p->aStack[p->nStack-1].iCode].iType;
}
/*
** Convert the wiki in z[] into html in the renderer p. The
** renderer has already been initialized.
**
** This routine will probably modify the content of z[].
*/
static void wiki_render(Renderer *p, char *z){
int tokenType;
ParsedMarkup markup;
int n;
int inlineOnly = (p->state & INLINE_MARKUP_ONLY)!=0;
while( z[0] ){
n = nextToken(z, p, &tokenType);
p->state &= ~(AT_NEWLINE|AT_PARAGRAPH);
switch( tokenType ){
case TOKEN_PARAGRAPH: {
if( inlineOnly ){
/* blob_append(p->pOut, " ¶ ", -1); */
blob_append(p->pOut, " ", -1);
}else{
if( p->wikiList ){
popStackToTag(p, p->wikiList);
p->wikiList = 0;
}
endAutoParagraph(p);
blob_appendf(p->pOut, "\n\n", 1);
p->wantAutoParagraph = 1;
}
p->state |= AT_PARAGRAPH|AT_NEWLINE;
break;
}
case TOKEN_NEWLINE: {
blob_append(p->pOut, "\n", 1);
p->state |= AT_NEWLINE;
break;
}
case TOKEN_BULLET: {
if( inlineOnly ){
blob_append(p->pOut, " • ", -1);
}else{
if( p->wikiList!=MARKUP_UL ){
if( p->wikiList ){
popStackToTag(p, p->wikiList);
}
pushStack(p, MARKUP_UL);
blob_append(p->pOut, "<ul>", 4);
p->wikiList = MARKUP_UL;
}
popStackToTag(p, MARKUP_LI);
startAutoParagraph(p);
pushStack(p, MARKUP_LI);
blob_append(p->pOut, "<li>", 4);
}
break;
}
case TOKEN_ENUM: {
if( inlineOnly ){
blob_appendf(p->pOut, " (%d) ", atoi(z));
}else{
if( p->wikiList!=MARKUP_OL ){
if( p->wikiList ){
popStackToTag(p, p->wikiList);
}
pushStack(p, MARKUP_OL);
blob_append(p->pOut, "<ol>", 4);
p->wikiList = MARKUP_OL;
}
popStackToTag(p, MARKUP_LI);
startAutoParagraph(p);
pushStack(p, MARKUP_LI);
blob_appendf(p->pOut, "<li value=\"%d\">", atoi(z));
}
break;
}
case TOKEN_INDENT: {
if( !inlineOnly ){
assert( p->wikiList==0 );
pushStack(p, MARKUP_BLOCKQUOTE);
blob_append(p->pOut, "<blockquote>", -1);
p->wantAutoParagraph = 0;
p->wikiList = MARKUP_BLOCKQUOTE;
}
break;
}
case TOKEN_CHARACTER: {
startAutoParagraph(p);
if( z[0]=='<' ){
blob_append(p->pOut, "<", 4);
}else if( z[0]=='&' ){
blob_append(p->pOut, "&", 5);
}
break;
}
case TOKEN_LINK: {
char *zTarget;
char *zDisplay = 0;
int i, j;
int savedState;
int needCloseA;
int altSize;
char zAltDisplay[100];
startAutoParagraph(p);
zTarget = &z[1];
for(i=1; z[i] && z[i]!=']'; i++){
if( z[i]=='|' && zDisplay==0 ){
zDisplay = &z[i+1];
z[i] = 0;
for(j=i-1; j>0 && isspace(z[j]); j--){ z[j] = 0; }
}
}
z[i] = 0;
if( zDisplay==0 ){
zDisplay = zTarget;
altSize = sizeof(zAltDisplay);
}else{
while( isspace(*zDisplay) ) zDisplay++;
altSize = 0;
}
zAltDisplay[0] = 0;
needCloseA = resolveHyperlink(p, zTarget, zAltDisplay, altSize);
savedState = p->state;
p->state &= ~ALLOW_WIKI;
p->state |= FONT_MARKUP_ONLY;
if( zAltDisplay[0] ){
wiki_render(p, zAltDisplay);
}else{
wiki_render(p, zDisplay);
}
p->state = savedState;
if( needCloseA ) blob_append(p->pOut, "</a>", 4);
break;
}
case TOKEN_TEXT: {
startAutoParagraph(p);
blob_append(p->pOut, z, n);
break;
}
case TOKEN_MARKUP: {
const char *zId;
int iDiv;
parseMarkup(&markup, z);
/* Markup of the form </div id=ID> where there is a matching
** ID somewhere on the stack. Exit the verbatim if were are in
** it. Pop the stack up to the matching <div>. Discard the
** </div>
*/
if( markup.iCode==MARKUP_DIV && markup.endTag &&
(zId = markupId(&markup))!=0 &&
(iDiv = findTagWithId(p, MARKUP_DIV, zId))>=0
){
if( p->inVerbatim ){
p->inVerbatim = 0;
p->state = p->preVerbState;
blob_append(p->pOut, "</pre>", 6);
}
while( p->nStack>iDiv+1 ) popStack(p);
if( p->aStack[iDiv].allowWiki ){
p->state |= ALLOW_WIKI;
}else{
p->state &= ~ALLOW_WIKI;
}
assert( p->nStack==iDiv+1 );
p->nStack--;
}else
/* If within <verbatim id=ID> ignore everything other than
** </verbatim id=ID> and the </dev id=ID2> above.
*/
if( p->inVerbatim ){
if( endVerbatim(p, &markup) ){
p->inVerbatim = 0;
p->state = p->preVerbState;
blob_append(p->pOut, "</pre>", 6);
}else{
unparseMarkup(&markup);
blob_append(p->pOut, "<", 4);
n = 1;
}
}else
/* Render invalid markup literally. The markup appears in the
** final output as plain text.
*/
if( markup.iCode==MARKUP_INVALID ){
unparseMarkup(&markup);
startAutoParagraph(p);
blob_append(p->pOut, "<", 4);
n = 1;
}else
/* If the markup is not font-change markup ignore it if the
** font-change-only flag is set.
*/
if( (markup.iType&MUTYPE_FONT)==0 && (p->state & FONT_MARKUP_ONLY)!=0 ){
/* Do nothing */
}else
/* Ignore block markup for in-line rendering.
*/
if( inlineOnly && (markup.iType&MUTYPE_INLINE)==0 ){
/* Do nothing */
}else
if( markup.iCode==MARKUP_NOWIKI ){
if( markup.endTag ){
p->state |= ALLOW_WIKI;
}else{
p->state &= ~ALLOW_WIKI;
}
}else
/* Generate end-tags */
if( markup.endTag ){
popStackToTag(p, markup.iCode);
}else
/* Push <div> markup onto the stack together with the id=ID attribute.
*/
if( markup.iCode==MARKUP_DIV ){
pushStackWithId(p, markup.iCode, markupId(&markup),
(p->state & ALLOW_WIKI)!=0);
}else
/* Enter <verbatim> processing. With verbatim enabled, all other
** markup other than the corresponding end-tag with the same ID is
** ignored.
*/
if( markup.iCode==MARKUP_VERBATIM ){
if( markup.nAttr==1 ){
p->zVerbatimId = markup.aAttr[0].zValue;
}else{
p->zVerbatimId = 0;
}
p->inVerbatim = 1;
p->preVerbState = p->state;
p->state &= ~ALLOW_WIKI;
blob_append(p->pOut, "<pre class='verbatim'>",-1);
p->wantAutoParagraph = 0;
}else
if( markup.iType==MUTYPE_LI ){
if( backupToType(p, MUTYPE_LIST)==0 ){
pushStack(p, MARKUP_UL);
blob_append(p->pOut, "<ul>", 4);
}
pushStack(p, MARKUP_LI);
renderMarkup(p->pOut, &markup);
}else
if( markup.iType==MUTYPE_TR ){
if( backupToType(p, MUTYPE_TABLE) ){
pushStack(p, MARKUP_TR);
renderMarkup(p->pOut, &markup);
}
}else
if( markup.iType==MUTYPE_TD ){
if( backupToType(p, MUTYPE_TABLE|MUTYPE_TR) ){
if( stackTopType(p)==MUTYPE_TABLE ){
pushStack(p, MARKUP_TR);
blob_append(p->pOut, "<tr>", 4);
}
pushStack(p, markup.iCode);
renderMarkup(p->pOut, &markup);
}
}else
if( markup.iType==MUTYPE_HYPERLINK ){
popStackToTag(p, markup.iCode);
startAutoParagraph(p);
renderMarkup(p->pOut, &markup);
pushStack(p, markup.iCode);
}else
{
if( markup.iType==MUTYPE_FONT ){
startAutoParagraph(p);
}else if( markup.iType==MUTYPE_BLOCK ){
p->wantAutoParagraph = 0;
}
if( (markup.iType & MUTYPE_STACK )!=0 ){
pushStack(p, markup.iCode);
}
renderMarkup(p->pOut, &markup);
}
break;
}
}
z += n;
}
}
/*
** Transform the text in the pIn blob. Write the results
** into the pOut blob. The pOut blob should already be
** initialized. The output is merely appended to pOut.
** If pOut is NULL, then the output is appended to the CGI
** reply.
*/
void wiki_convert(Blob *pIn, Blob *pOut, int flags){
char *z;
Renderer renderer;
memset(&renderer, 0, sizeof(renderer));
renderer.state = ALLOW_WIKI|AT_NEWLINE|AT_PARAGRAPH;
if( flags & WIKI_NOBLOCK ){
renderer.state |= INLINE_MARKUP_ONLY;
}
if( flags & WIKI_INLINE ){
renderer.wantAutoParagraph = 0;
}else{
renderer.wantAutoParagraph = 1;
}
if( pOut ){
renderer.pOut = pOut;
}else{
renderer.pOut = cgi_output_blob();
}
z = blob_str(pIn);
wiki_render(&renderer, z);
endAutoParagraph(&renderer);
while( renderer.nStack ){
popStack(&renderer);
}
blob_append(renderer.pOut, "\n", 1);
free(renderer.aStack);
}
/*
** COMMAND: test-wiki-render
*/
void test_wiki_render(void){
Blob in, out;
if( g.argc!=3 ) usage("FILE");
blob_zero(&out);
blob_read_from_file(&in, g.argv[2]);
wiki_convert(&in, &out, 0);
blob_write_to_file(&out, "-");
}