gecko-dev/modules/xml/js/jsxparse.c

237 строки
6.1 KiB
C

/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#define XMLJS_INTERNAL
#include "xmljs.h"
#undef XMLJS_INTERNAL
static void
StartElementHandler(void *userdata, const char *name, const char **atts)
{
XMLCallback *cb = (XMLCallback *)userdata;
int i;
JSString *namestr = NULL, *attstr = NULL;
JSObject *attobj = NULL;
JSContext *cx = cb->cx;
jsval argv[2];
jsval rval;
JSFunction *fun;
if (!JS_GetProperty(cx, cb->obj, "startElement", &rval) ||
JSVAL_IS_VOID(rval) || JSVAL_IS_NULL(rval))
return;
fun = JS_ValueToFunction(cx, rval);
if (!fun)
return;
/* oh, for local roots */
JS_AddRoot(cx, &namestr);
JS_AddRoot(cx, &attobj);
JS_AddRoot(cx, &attstr);
namestr = JS_NewStringCopyZ(cx, name);
if (atts[0]) {
if (!JS_EvaluateScript(cx, JS_GetGlobalObject(cx), xmljs_newObj_str,
xmljs_newObj_size,
"XMLParser internal", 0, &rval)) {
JS_ReportError(cx, "failed to create attobj");
goto out;
}
attobj = JSVAL_TO_OBJECT(rval);
for (i = 0; atts[i]; i+=2) {
attstr = JS_NewStringCopyZ(cx, atts[i+1]);
if (!attstr ||
!JS_DefineProperty(cx, attobj, atts[i],
STRING_TO_JSVAL(attstr),
NULL, NULL, JSPROP_ENUMERATE)) {
JS_ReportError(cx, "defining att prop %s failed", atts[i]);
goto out;
}
}
}
argv[0] = STRING_TO_JSVAL(namestr);
argv[1] = OBJECT_TO_JSVAL(attobj);
JS_CallFunction(cx, cb->obj, fun, 2, argv, &rval);
out:
JS_RemoveRoot(cx, &namestr);
JS_RemoveRoot(cx, &attstr);
JS_RemoveRoot(cx, &attobj);
}
static void
EndElementHandler(void *userdata, const char *name)
{
XMLCallback *cb = (XMLCallback *)userdata;
JSString *namestr = NULL;
JSContext *cx = cb->cx;
jsval argv[1];
jsval rval;
JSFunction *fun;
if (!JS_GetProperty(cx, cb->obj, "endElement", &rval) ||
JSVAL_IS_VOID(rval) || JSVAL_IS_NULL(rval))
return;
fun = JS_ValueToFunction(cx, rval);
if (!fun)
return;
/* oh, for local roots */
JS_AddRoot(cx, &namestr);
namestr = JS_NewStringCopyZ(cx, name);
if (!namestr)
goto out;
argv[0] = STRING_TO_JSVAL(namestr);
JS_CallFunction(cx, cb->obj, fun, 1, argv, &rval);
out:
JS_RemoveRoot(cx, &namestr);
}
static void
CharacterDataHandler(void *userdata, const char *s, int len)
{
XMLCallback *cb = (XMLCallback *)userdata;
JSString *cdatastr = NULL;
JSContext *cx = cb->cx;
jsval argv[1];
jsval rval;
JSFunction *fun;
if (!JS_GetProperty(cx, cb->obj, "characterData", &rval) ||
JSVAL_IS_VOID(rval) || JSVAL_IS_NULL(rval))
return;
fun = JS_ValueToFunction(cx, rval);
if (!fun)
return;
/* oh, for local roots */
JS_AddRoot(cx, &cdatastr);
cdatastr = JS_NewStringCopyZ(cx, s);
if (!cdatastr)
goto out;
argv[0] = STRING_TO_JSVAL(cdatastr);
JS_CallFunction(cx, cb->obj, fun, 1, argv, &rval);
out:
JS_RemoveRoot(cx, &cdatastr);
}
static void
ProcessingInstructionHandler(void *userdata, const char *target,
const char *data)
{
XMLCallback *cb = (XMLCallback *)userdata;
JSString *targetstr = NULL, *datastr = NULL;
JSContext *cx = cb->cx;
jsval argv[2];
jsval rval;
JSFunction *fun;
if (!JS_GetProperty(cx, cb->obj, "processingInstruction", &rval) ||
JSVAL_IS_VOID(rval) || JSVAL_IS_NULL(rval))
return;
fun = JS_ValueToFunction(cx, rval);
if (!fun)
return;
JS_AddRoot(cx, &targetstr);
JS_AddRoot(cx, &datastr);
targetstr = JS_NewStringCopyZ(cx, target);
if (!targetstr)
goto out;
datastr = JS_NewStringCopyZ(cx, data);
if (!datastr)
goto out;
argv[0] = STRING_TO_JSVAL(targetstr);
argv[1] = STRING_TO_JSVAL(datastr);
JS_CallFunction(cx, cb->obj, fun, 2, argv, &rval);
out:
JS_RemoveRoot(cx, &targetstr);
JS_RemoveRoot(cx, &datastr);
}
static JSBool
XMLParser(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
{
XMLCallback *cb = JS_malloc(cx, sizeof(XMLCallback));
if (!cb)
return JS_FALSE;
cb->start = StartElementHandler;
cb->end = EndElementHandler;
cb->cdata = CharacterDataHandler;
cb->processing = ProcessingInstructionHandler;
cb->xml = NULL;
cb->obj = obj;
cb->preParse = cb->postParse = NULL;
cb->cx = cx; /* XXX obj can persist longer than cx *sigh* */
return JS_SetPrivate(cx, obj, (void *)cb);
}
static void
xmlparser_finalize(JSContext *cx, JSObject *obj)
{
XMLCallback *cb;
cb = (XMLCallback *)JS_GetPrivate(cx, obj);
if (!cb)
return;
JS_free(cx, cb);
}
JSClass XMLParser_class = {
"XMLParser", JSCLASS_HAS_PRIVATE,
JS_PropertyStub, JS_PropertyStub, JS_PropertyStub, JS_PropertyStub,
JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, xmlparser_finalize
};
JSFunctionSpec xmlparser_funcs[] = {
{0}
};
JSPropertySpec xmlparser_props[] = {
{0}
};
JSBool
XMLParser_Init(JSContext *cx, JSObject *obj, JSObject *parent_proto)
{
JSObject *proto = JS_InitClass(cx, obj, parent_proto, &XMLParser_class,
XMLParser, 1,
xmlparser_props, xmlparser_funcs,
NULL, NULL);
return proto &&
JS_DefineProperty(cx, proto, "startElement", JSVAL_NULL, NULL, NULL,
JSPROP_ENUMERATE) &&
JS_DefineProperty(cx, proto, "endElement", JSVAL_NULL, NULL, NULL,
JSPROP_ENUMERATE) &&
JS_DefineProperty(cx, proto, "characterData", JSVAL_NULL, NULL, NULL,
JSPROP_ENUMERATE) &&
JS_DefineProperty(cx, proto, "processingInstruction", JSVAL_NULL,
NULL, NULL, JSPROP_ENUMERATE);
}