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/* HTStyle: Style management for libwww
STYLE DEFINITION FOR HYPERTEXT
Styles allow the translation between a logical property of a piece of text and its
physical representation.
A StyleSheet is a collection of styles, defining the translation necessary to represent
a document. It is a linked list of styles.
Overriding this module
Why is the style structure declared in the HTStyle.h module, instead of having the user
browser define the structure, and the HTStyle routines just use sizeof() for copying?
It's not obvious whether HTStyle.c should be common code. It's useful to have common
code for loading style sheets, especially if the movement toward standard style sheets
gets going.
If it IS common code, then both the hypertext object and HTStyle.c must know the
structure of a style, so HTStyle.h is a suitable place to put that. HTStyle.c has to
be compiled with a knowledge of the
It we take it out of the library, then of course HTStyle could be declared as an
undefined structure. The only references to it are in the structure-flattening code
HTML.c and HTPlain.c, which only use HTStypeNamed().
You can in any case override this function in your own code, which will prevent the
HTStyle from being loaded. You will be able to redefine your style structure in this
case without problems, as no other moule needs to know it.
*/
#ifndef HTStyle_H
#define HTStyle_H
#include <HTAnchor.h>
typedef long int HTFont; /* Dummy definition instead */
#ifdef NeXT_suppressed
#include <appkit/appkit.h>
typedef NXCoord HTCoord;
#define HTParagraphStyle NXTextStyle
#define HTCoord NXCoord
typedef struct _color {
float grey;
int RGBColor;
} HTColor;
#else
typedef int HTCoord; /* changed from float to int - kw */
typedef struct _HTParagraphStyle {
HTCoord left_indent; /* @@@@ junk! etc etc*/
} HTParagraphStyle;
typedef int HTColor; /* Sorry about the US spelling! */
#endif
#define STYLE_NAME_LENGTH 80 /* @@@@@@@@@@@ */
typedef struct {
short kind; /* only NX_LEFTTAB implemented*/
HTCoord position; /* x coordinate for stop */
} HTTabStop;
/* The Style Structure
** -------------------
*/
typedef struct _HTStyle {
/* Style management information
*/
struct _HTStyle *next; /* Link for putting into stylesheet */
char * name; /* Style name */
char * SGMLTag; /* Tag name to start */
/* Character attributes (a la NXRun)
*/
HTFont font; /* Font id */
HTCoord fontSize; /* The size of font, not independent */
HTColor color; /* text gray of current run */
int superscript; /* superscript (-sub) in points */
HTAnchor *anchor; /* Anchor id if any, else zero */
/* Paragraph Attribtes (a la NXTextStyle)
*/
HTCoord indent1st; /* how far first line in paragraph is
* indented */
HTCoord leftIndent; /* how far second line is indented */
HTCoord rightIndent; /* (Missing from NeXT version */
short alignment; /* quad justification */
HTCoord lineHt; /* line height */
HTCoord descentLine; /* descender bottom from baseline */
CONST HTTabStop *tabs; /* array of tab stops, 0 terminated */
BOOL wordWrap; /* Yes means wrap at space not char */
BOOL freeFormat; /* Yes means \n is just white space */
HTCoord spaceBefore; /* Omissions from NXTextStyle */
HTCoord spaceAfter;
int paraFlags; /* Paragraph flags, bits as follows: */
#define PARA_KEEP 1 /* Do not break page within this paragraph */
#define PARA_WITH_NEXT 2 /* Do not break page after this paragraph */
#define HT_JUSTIFY 0 /* For alignment */
#define HT_LEFT 1
#define HT_RIGHT 2
#define HT_CENTER 3
} HTStyle;
/* Style functions:
*/
extern HTStyle * HTStyleNew NOPARAMS;
extern HTStyle * HTStyleNewNamed PARAMS ((CONST char * name));
extern HTStyle * HTStyleFree PARAMS((HTStyle * self));
#ifdef SUPRESS
extern HTStyle * HTStyleRead PARAMS((HTStyle * self, HTStream * stream));
extern HTStyle * HTStyleWrite PARAMS((HTStyle * self, HTStream * stream));
#endif
/* Style Sheet
** -----------
*/
typedef struct _HTStyleSheet {
char * name;
HTStyle * styles;
} HTStyleSheet;
/* Stylesheet functions:
*/
extern HTStyleSheet * HTStyleSheetNew NOPARAMS;
extern HTStyleSheet * HTStyleSheetFree PARAMS((HTStyleSheet * self));
extern HTStyle * HTStyleNamed PARAMS((HTStyleSheet * self, CONST char * name));
extern HTStyle * HTStyleForParagraph PARAMS((HTStyleSheet * self,
HTParagraphStyle * paraStyle));
extern HTStyle * HTStyleMatching PARAMS((HTStyleSheet *self, HTStyle * style));
/* extern HTStyle * HTStyleForRun PARAMS((HTStyleSheet *self, NXRun * run)); */
extern HTStyleSheet * HTStyleSheetAddStyle PARAMS((HTStyleSheet * self,
HTStyle * style));
extern HTStyleSheet * HTStyleSheetRemoveStyle PARAMS((HTStyleSheet * self,
HTStyle * style));
#ifdef SUPPRESS
extern HTStyleSheet * HTStyleSheetRead PARAMS((HTStyleSheet * self,
HTStream * stream));
extern HTStyleSheet * HTStyleSheetWrite PARAMS((HTStyleSheet * self,
HTStream * stream));
#endif
#define CLEAR_POINTER ((void *)-1) /* Pointer value means "clear me" */
/* DefaultStyle.c */
extern HTStyleSheet * DefaultStyle NOPARAMS;
#endif /* HTStyle_H */
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