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/* Style Implementation for Hypertext HTStyle.c
** ==================================
**
** 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.
*/
#include "HTUtils.h"
#include "HTStyle.h"
#include "LYLeaks.h"
#define FREE(x) if (x) {free(x); x = NULL;}
/* Create a new style
*/
PUBLIC HTStyle* HTStyleNew NOARGS
{
HTStyle * self = (HTStyle *)malloc(sizeof(*self));
memset((void *)self, 0, sizeof(*self));
self->font = (HTFont) 0;
self->color = 0;
return self;
}
/* Create a new style with a name
*/
PUBLIC HTStyle* HTStyleNewNamed ARGS1 (CONST char *,name)
{
HTStyle * self = HTStyleNew();
StrAllocCopy(self->name, name);
return self;
}
/* Free a style
*/
PUBLIC HTStyle * HTStyleFree ARGS1 (HTStyle *,self)
{
FREE(self->name);
FREE(self->SGMLTag);
FREE(self);
return NULL;
}
#ifdef SUPPRESS /* Only on the NeXT */
/* Read a style from a stream (without its name)
** --------------------------
**
** Reads a style with paragraph information from a stream.
** The style name is not read or written by these routines.
*/
#define NONE_STRING "(None)"
#define HTStream NXStream
HTStyle * HTStyleRead (HTStyle * style, HTStream * stream)
{
char myTag[STYLE_NAME_LENGTH];
char fontName[STYLE_NAME_LENGTH];
NXTextStyle *p;
int tab;
int gotpara; /* flag: have we got a paragraph definition? */
NXScanf(stream, "%s%s%f%d",
myTag,
fontName,
&style->fontSize,
&gotpara);
if (gotpara) {
if (!style->paragraph) {
style->paragraph = malloc(sizeof(*(style->paragraph)));
style->paragraph->tabs = 0;
}
p = style->paragraph;
NXScanf(stream, "%f%f%f%f%hd%f%f%hd",
&p->indent1st,
&p->indent2nd,
&p->lineHt,
&p->descentLine,
&p->alignment,
&style->spaceBefore,
&style->spaceAfter,
&p->numTabs);
FREE(p->tabs);
p->tabs = malloc(p->numTabs * sizeof(p->tabs[0]));
for (tab=0; tab < p->numTabs; tab++) {
NXScanf(stream, "%hd%f",
&p->tabs[tab].kind,
&p->tabs[tab].x);
}
} else { /* No paragraph */
FREE(style->paragraph);
} /* if no paragraph */
StrAllocCopy(style->SGMLTag, myTag);
if (strcmp(fontName, NONE_STRING)==0)
style->font = 0;
else
style->font = [Font newFont:fontName size:style->fontSize];
return NULL;
}
/* Write a style to a stream in a compatible way
*/
HTStyle * HTStyleWrite (HTStyle * style, NXStream * stream)
{
int tab;
NXTextStyle *p = style->paragraph;
NXPrintf(stream, "%s %s %f %d\n",
style->SGMLTag,
style->font ? [style->font name] : NONE_STRING,
style->fontSize,
p!=0);
if (p) {
NXPrintf(stream, "\t%f %f %f %f %d %f %f\t%d\n",
p->indent1st,
p->indent2nd,
p->lineHt,
p->descentLine,
p->alignment,
style->spaceBefore,
style->spaceAfter,
p->numTabs);
for (tab=0; tab < p->numTabs; tab++)
NXPrintf(stream, "\t%d %f\n",
p->tabs[tab].kind,
p->tabs[tab].x);
}
return style;
}
/* Write a style to stdout for diagnostics
*/
HTStyle * HTStyleDump (HTStyle * style)
{
int tab;
NXTextStyle *p = style->paragraph;
printf("Style %d `%s' SGML:%s. Font %s %.1f point.\n",
style,
style->name,
style->SGMLTag,
[style->font name],
style->fontSize);
if (p) {
printf(
"\tIndents: first=%.0f others=%.0f, Height=%.1f Desc=%.1f\n"
"\tAlign=%d, %d tabs. (%.0f before, %.0f after)\n",
p->indent1st,
p->indent2nd,
p->lineHt,
p->descentLine,
p->alignment,
p->numTabs,
style->spaceBefore,
style->spaceAfter);
for (tab=0; tab < p->numTabs; tab++) {
printf("\t\tTab kind=%d at %.0f\n",
p->tabs[tab].kind,
p->tabs[tab].x);
}
printf("\n");
} /* if paragraph */
return style;
}
#endif /* SUPPRESS */
/* StyleSheet Functions
** ====================
*/
/* Searching for styles:
*/
HTStyle * HTStyleNamed ARGS2 (HTStyleSheet *,self, CONST char *,name)
{
HTStyle * scan;
for (scan=self->styles; scan; scan=scan->next)
if (0==strcmp(scan->name, name)) return scan;
if (TRACE) fprintf(stderr, "StyleSheet: No style named `%s'\n", name);
return NULL;
}
#ifdef NEXT_SUPRESS /* Not in general common code */
HTStyle * HTStyleMatching (HTStyleSheet * self, HTStyle *style)
{
HTStyle * scan;
for (scan=self->styles; scan; scan=scan->next)
if (scan->paragraph == para) return scan;
return NULL;
}
/* Find the style which best fits a given run
** ------------------------------------------
**
** This heuristic is used for guessing the style for a run of
** text which has been pasted in. In order, we try:
**
** A style whose paragraph structure is actually used by the run.
** A style matching in font
** A style matching in paragraph style exactly
** A style matching in paragraph to a degree
*/
HTStyle * HTStyleForRun (HTStyleSheet *self, NXRun *run)
{
HTStyle * scan;
HTStyle * best = 0;
int bestMatch = 0;
NXTextStyle * rp = run->paraStyle;
for (scan=self->styles; scan; scan=scan->next)
if (scan->paragraph == run->paraStyle) return scan; /* Exact */
for (scan=self->styles; scan; scan=scan->next){
NXTextStyle * sp = scan->paragraph;
if (sp) {
int match = 0;
if (sp->indent1st == rp->indent1st) match = match+1;
if (sp->indent2nd == rp->indent2nd) match = match+2;
if (sp->lineHt == rp->lineHt) match = match+1;
if (sp->numTabs == rp->numTabs) match = match+1;
if (sp->alignment == rp->alignment) match = match+3;
if (scan->font == run->font) match = match+10;
if (match>bestMatch) {
best=scan;
bestMatch=match;
}
}
}
if (TRACE) fprintf(stderr, "HTStyleForRun: Best match for style is %d out of 18\n",
bestMatch);
return best;
}
#endif /* NEXT_SUPRESS */
/* Add a style to a sheet
** ----------------------
*/
HTStyleSheet * HTStyleSheetAddStyle ARGS2
(HTStyleSheet *,self, HTStyle *,style)
{
style->next = 0; /* The style will go on the end */
if (!self->styles) {
self->styles = style;
} else {
HTStyle * scan;
for(scan=self->styles; scan->next; scan=scan->next); /* Find end */
scan->next=style;
}
return self;
}
/* Remove the given object from a style sheet if it exists
*/
HTStyleSheet * HTStyleSheetRemoveStyle ARGS2
(HTStyleSheet *,self, HTStyle *,style)
{
if (self->styles = style) {
self->styles = style->next;
return self;
} else {
HTStyle * scan;
for(scan = self->styles; scan; scan = scan->next) {
if (scan->next = style) {
scan->next = style->next;
return self;
}
}
}
return NULL;
}
/* Create new style sheet
*/
HTStyleSheet * HTStyleSheetNew NOARGS
{
HTStyleSheet * self = (HTStyleSheet *)malloc(sizeof(*self));
memset((void*)self, 0, sizeof(*self)); /* ANSI */
/* Harbison c ref man says (char*)self
but k&r ansii and abc books and Think_C say (void*) */
/* bzero(self, sizeof(*self)); */ /* BSD */
return self;
}
/* Free off a style sheet pointer
*/
HTStyleSheet * HTStyleSheetFree ARGS1 (HTStyleSheet *,self)
{
HTStyle * style;
while((style=self->styles)!=0) {
self->styles = style->next;
HTStyleFree(style);
}
FREE(self);
return NULL;
}
/* Read a stylesheet from a typed stream
** -------------------------------------
**
** Reads a style sheet from a stream. If new styles have the same names
** as existing styles, they replace the old ones without changing the ids.
*/
#ifdef NEXT_SUPRESS /* Only on the NeXT */
HTStyleSheet * HTStyleSheetRead(HTStyleSheet * self, NXStream * stream)
{
int numStyles;
int i;
HTStyle * style;
char styleName[80];
NXScanf(stream, " %d ", &numStyles);
if (TRACE) fprintf(stderr, "Stylesheet: Reading %d styles\n", numStyles);
for (i=0; i<numStyles; i++) {
NXScanf(stream, "%s", styleName);
style = HTStyleNamed(self, styleName);
if (!style) {
style = HTStyleNewNamed(styleName);
(void) HTStyleSheetAddStyle(self, style);
}
(void) HTStyleRead(style, stream);
if (TRACE) HTStyleDump(style);
}
return self;
}
/* Write a stylesheet to a typed stream
** ------------------------------------
**
** Writes a style sheet to a stream.
*/
HTStyleSheet * HTStyleSheetWrite(HTStyleSheet * self, NXStream * stream)
{
int numStyles = 0;
HTStyle * style;
for(style=self->styles; style; style=style->next) numStyles++;
NXPrintf(stream, "%d\n", numStyles);
if (TRACE) fprintf(stderr, "StyleSheet: Writing %d styles\n", numStyles);
for (style=self->styles; style; style=style->next) {
NXPrintf(stream, "%s ", style->name);
(void) HTStyleWrite(style, stream);
}
return self;
}
#endif /* NEXT_SUPRESS */
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.