Magic-Mirror/gecko-dev
1
0
Fork 0
mirror of https://github.com/mozilla/gecko-dev.git synced 2024-10-09 19:35:51 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

perignon grows (and throbs)

Browse Source
This commit is contained in:
shaver%netscape.com 1998-09-10 22:14:52 +00:00
parent d15d905b2d
commit a8187ae035
2 changed files with 146 additions and 36 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

115
lib/libdom/domstyle.c
View File

@ -19,13 +19,68 @@
#include "domstyle.h"
static DOM_StyleSelector *
GetBaseSelector(DOM_StyleDatabase *db, DOM_StyleToken type)
GetBaseSelector(JSContext *cx, DOM_StyleDatabase *db, DOM_StyleToken type,
DOM_StyleToken pseudo)
{
DOM_StyleSelector *sel = NULL;
/* sel = HASH_LOOKUP(db->hashtable, type); */
return sel;
}
static void
DestroySelector(JSContext *cx, DOM_StyleSelector *sel)
{
XP_FREE(sel->selector);
if (sel->pseudo)
XP_FREE(sel->pseudo);
if (sel->rules) {
DOM_StyleRule *iter, *next;
iter = sel->rules;
do {
next = iter->next;
XP_FREE(iter->entry.name);
XP_FREE(iter->entry.value);
XP_FREE(iter);
iter = next;
} while (iter);
}
XP_FREE(sel);
}
static DOM_StyleSelector *
NewSelector(JSContext *cx, DOM_StyleToken selector, DOM_StyleToken pseudo)
{
DOM_StyleSelector *sel;
sel = XP_NEW_ZAP(DOM_StyleSelector);
if (!sel)
return NULL;
if (selector[0] == '.') {
sel->type = SELECTOR_CLASS;
selector++;
} else if (selector[0] == '#') {
sel->type = SELECTOR_ID;
selector++;
} else {
sel->type = SELECTOR_TAG;
}
sel->selector = XP_STRDUP(selector);
if (!sel->selector) {
DestroySelector(cx, sel);
return NULL;
}
if (pseudo) {
sel->pseudo = XP_STRDUP(pseudo);
if (!sel->pseudo) {
DestroySelector(cx, sel);
return NULL;
}
}
return sel;
}
/* the pseudoclass, if any, is stored in a magic attribute */
static DOM_StyleToken
GetPseudo(JSContext *cx, DOM_Element *element)
@ -57,6 +112,14 @@ GetPseudo(JSContext *cx, DOM_Element *element)
element->tagName); \
#endif
static JSBool
SelectorMatchesToken(JSContext *cx, DOM_StyleSelector *sel,
DOM_StyleToken token, DOM_StyleToken pseudo)
{
/* XXX handle #ID and .class */
return !XPSTRCMP(sel->type, token);
}
static JSBool
SelectorMatchesElement(JSContext *cx, DOM_Element *element,
DOM_StyleSelector *sel)
@ -177,6 +240,52 @@ DOM_StyleGetProperty(JSContext *cx, DOM_StyleDatabase *db,
if (!sel)
return JS_TRUE;
return CheckSelector(cx, element, sel, property, entryp, &best,
1);
/*
* CheckSelector will recursively find the best match for a given
* property.
*/
return CheckSelector(cx, element, sel, property, entryp, &best, 1);
}
DOM_StyleSelector *
DOM_StyleFindSelector(JSContext *cx, DOM_StyleDatabase *db,
DOM_StyleSelector *base, DOM_StyleToken enclosing,
DOM_StyleToken pseudo)
{
DOM_StyleSelector *sel;
/* looking for the base one */
if (!base) {
sel = GetBaseSelector(cx, db, enclosing, pseudo);
if (!sel)
sel = NewSelector(cx, enclosing, pseudo);
if (sel)
InsertBaseSelector(cx, db, sel);
return sel;
}
if (!base->enclosing) {
sel = NewSelector(cx, enclosing, pseudo);
if (!sel)
return NULL;
base->enclosing = sel;
return sel;
}
/* check existing enclosing selectors */
sel = base->enclosing;
do {
if (SelectorMatchesToken(cx, sel, enclosing, pseudo))
return sel;
sel = sel->sibling;
} while (sel);
/* nothing found that matches, so create a new one */
sel = NewSelector(cx, enclosing, pseudo);
if (!sel)
return NULL;
sel->sibling = base->enclosing;
base->enclosing = sel;
return sel;
}

67
lib/libdom/domstyle.h
View File

@ -33,7 +33,7 @@ typedef struct DOM_StyleRule DOM_StyleRule;
/*
* DOM_StyleTokens are used for identification of elements ("H1"), style
* properties ("color"), style values ("blue") and pseudo-classes (":visited").
* properties ("color"), style values ("blue") and pseudo-classes ("visited").
*/
/* this may become int or something later, for speed */
@ -44,19 +44,22 @@ typedef const char *DOM_StyleToken;
#define DOM_STYLE_SELECTOR_TYPE(sel) ((sel) & ~DOM_STYLE_PSEUDO_TAG)
#define DOM_PSEUDOIZE(sel) ((sel) | DOM_STYLE_PSEUDO_TAG)
typedef enum {
enum {
SELECTOR_UNKNOWN = 0
SELECTOR_ID,
SELECTOR_CLASS,
SELECTOR_TAG
}
struct DOM_StyleDatabase {
void *hashtable; /* PRHash, from js/ref or nsprpub, depending? */
};
struct DOM_StyleDatabase {
PRHashTable *hashtable; /* PRHash, from js/ref or nsprpub, depending? */
};
DOM_StyleDatabase *
DOM_NewStyleDatabase(JSContext *cx);
struct DOM_StyleSelector {
int8 selectorType;
int8 type;
DOM_StyleToken selector;
DOM_StyleToken pseudo;
DOM_StyleSelector *enclosing;
@ -64,6 +67,26 @@ struct DOM_StyleSelector {
DOM_StyleRule *rules;
};
/*
* Find or create a selector for the given enclosing element type, starting
* from the provided (optional) base selector.
*
* Usage examples:
*
* Find/create a selector for "B"
* sel = DOM_StyleFindSelector(cx, db, NULL, "B", NULL);
*
* Now find/create a selector for "CODE B":
* sel2 = DOM_StyleFindSelector(cx, db, sel, "CODE", NULL);
*
* And for "A:visited CODE B":
* sel3 = DOM_StyleFindSelector(cx, db, sel2, "A", "visited");
*/
DOM_StyleSelector *
DOM_StyleFindSelector(JSContext *cx, DOM_StyleDatabase *db,
DOM_StyleSelector *base, DOM_StyleToken enclosing,
DOM_StyleToken pseudo);
struct DOM_StyleRule {
DOM_AttributeEntry entry;
int16 weight;
@ -106,30 +129,8 @@ DOM_StyleAddRule(JSContext *cx, DOM_StyleDatabase *db, const char *rule,
JSBool
DOM_StyleGetProperty(JSContext *cx, DOM_StyleDatabase *db, DOM_Node *node,
DOM_StyleToken property, DOM_StyleToken psuedo,
DOM_AttributeEntry **entryp);
/*
* Find or create a selector for the given enclosing element type, starting
* from the provided (optional) base selector.
*
* Usage examples:
*
* Find/create a selector for "B"
* sel = DOM_StyleFindSelector(cx, db, NULL, "B");
*
* Now find/create a selector for "CODE B":
* sel2 = DOM_StyleFindSelector(cx, db, sel, "CODE");
*
* And for "H1 CODE B":
* sel3 = DOM_StyleFindSelector(cx, db, sel2, "H1");
*
* Pseudo-classes are prefixed with ":":
* visited = DOM_StyleFindSelector(cx, db, hrefSel, ":visited");
*/
DOM_StyleSelector *
DOM_StyleFindSelector(JSContext *cx, DOM_StyleDatabase *db,
DOM_StyleSelector *base, DOM_StyleToken enclosing);
DOM_StyleToken property, DOM_StyleToken psuedo,
DOM_AttributeEntry **entryp);
/*
* Add a property to the provided selector.
@ -137,7 +138,7 @@ DOM_StyleFindSelector(JSContext *cx, DOM_StyleDatabase *db,
* DOM_StyleAddRule(cx, db, sel, "color", "blue");
*/
JSBool
DOM_StyleAddRule(JSContext *cx, DOM_StyleDatabase *db, DOM_StyleToken name,
const char *value);
DOM_StyleAddRule(JSContext *cx, DOM_StyleDatabase *db, DOM_StyleSelector *sel,
DOM_StyleToken name, const char *value);
#endif /* DOM_STYLE_H */