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/*
* $LynxId: HTStyle.c,v 1.17 2023/10/24 08:14:31 tom Exp $
*
* 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>
/* Create a new style
*/
HTStyle *HTStyleNew(void)
{
HTStyle *self = typecalloc(HTStyle);
if (self == NULL)
outofmem(__FILE__, "HTStyleNew");
return self;
}
/* Create a new style with a name
*/
HTStyle *HTStyleNewNamed(const char *name)
{
HTStyle *self = HTStyleNew();
StrAllocCopy(self->w_name, name);
self->id = -1; /* <0 */
return self;
}
/* Free a style
*/
HTStyle *HTStyleFree(HTStyle *self)
{
FREE(self->w_name);
FREE(self->w_SGMLTag);
FREE(self);
return NULL;
}
/* StyleSheet Functions
* ====================
*/
/* Searching for styles:
*/
HTStyle *HTStyleNamed(HTStyleSheet *self, const char *name)
{
HTStyle *scan;
for (scan = self->styles; scan; scan = scan->next)
if (0 == strcmp(GetHTStyleName(scan), name))
return scan;
CTRACE((tfp, "StyleSheet: No style named `%s'\n", name));
return NULL;
}
/* Add a style to a sheet
* ----------------------
*/
HTStyleSheet *HTStyleSheetAddStyle(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(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(void)
{
HTStyleSheet *self = typecalloc(HTStyleSheet);
if (self == NULL)
outofmem(__FILE__, "HTStyleSheetNew");
return self;
}
/* Free off a style sheet pointer
*/
HTStyleSheet *HTStyleSheetFree(HTStyleSheet *self)
{
HTStyle *style;
while ((style = self->styles) != 0) {
self->styles = style->next;
HTStyleFree(style);
}
FREE(self);
return NULL;
}
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