/* -*- 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 1.1 (the "License"); you may not use this file * except in compliance with the License. You may obtain a copy of * the License at http://www.mozilla.org/NPL/ * * Software distributed under the License is distributed on an "AS * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or * implied. See the License for the specific language governing * rights and limitations under the License. * * The Original Code is mozilla.org code. * * The Initial Developer of the Original Code is Netscape * Communications Corporation. Portions created by Netscape are * Copyright (C) 1998 Netscape Communications Corporation. All * Rights Reserved. * * Contributor(s): */ #define XMLJS_INTERNAL #include "xmljs.h" #undef XMLJS_INTERNAL #if DEBUG_shaver #include #endif /** * An XMLGraph JS object produces an object graph in response * to XML parser events. */ typedef struct { XMLCallback cb; JSObject *current; char *nameBy; } XMLGraphCallback; static char xmlg_up_str[] = "__up__"; static void StartElementHandler(void *userdata, const char *name, const char **atts) { XMLGraphCallback * cb = (XMLGraphCallback *)userdata; int i; JSObject *element, *attobj, *array; JSContext *cx = cb->cb.cx; jsval rval; if (!cb->current) { if (!JS_EvaluateScript(cx, JS_GetGlobalObject(cx), xmljs_newObj_str, xmljs_newObj_size, "XMLGraph internal", 0, &rval)) { JS_ReportError(cx, "failed to create new Object"); return; } element = JSVAL_TO_OBJECT(rval); cb->current = element; if (!JS_DefineProperty(cx, cb->cb.obj, "graph", rval, NULL, NULL, JSPROP_ENUMERATE)) { JS_ReportError(cx, "failed to define graph prop"); return; } } if (!JS_EvaluateScript(cx, JS_GetGlobalObject(cx), xmljs_newObj_str, xmljs_newObj_size, "XMLGraph internal", 0, &rval)) { JS_ReportError(cx, "failed to create new Object"); return; } element = JSVAL_TO_OBJECT(rval); /* populate and set __attributes__ */ if (atts[0]) { JSString *attstr; if (!JS_EvaluateScript(cx, JS_GetGlobalObject(cx), xmljs_newObj_str, xmljs_newObj_size, "XMLGraph internal", 0, &rval)) return; attobj = JSVAL_TO_OBJECT(rval); for (i = 0; atts[i]; i+=2) { /* * if we have an attribute that matches nameBy, use * the value of that attribute to name the node */ if (cb->nameBy && !strcmp(cb->nameBy, atts[i])) name = atts[i+1]; attstr = JS_NewStringCopyZ(cx, atts[i+1]); if (!attstr || !JS_DefineProperty(cx, attobj, atts[i], STRING_TO_JSVAL(attstr), NULL, NULL, JSPROP_ENUMERATE)) return; } if (!JS_DefineProperty(cx, element, "__attributes__", OBJECT_TO_JSVAL(attobj), NULL, NULL, 0)) return; } /* Check for existing property with this name */ if (!JS_GetProperty(cx, cb->current, name, &rval)) return; if (JSVAL_IS_OBJECT(rval)) { JSObject *existing = JSVAL_TO_OBJECT(rval); if (JS_IsArrayObject(cx, existing)) { /* already an array, so append */ jsuint length; if (!JS_GetArrayLength(cx, existing, &length) || !JS_DefineElement(cx, existing, (jsint)length, OBJECT_TO_JSVAL(element), NULL, NULL, JSPROP_ENUMERATE)) return; } else { /* replace with an array [current, new] */ jsval vector[2]; vector[0] = OBJECT_TO_JSVAL(existing); vector[1] = OBJECT_TO_JSVAL(element); array = JS_NewArrayObject(cx, 2, vector); if (!array || !JS_DefineProperty(cx, cb->current, name, OBJECT_TO_JSVAL(array), NULL, NULL, JSPROP_ENUMERATE)) return; } } else if (!JS_DefineProperty(cx, cb->current, name, OBJECT_TO_JSVAL(element), NULL, NULL, JSPROP_ENUMERATE)) return; /* define backpointer __up__ */ if (!JS_DefineProperty(cx, element, xmlg_up_str, OBJECT_TO_JSVAL(cb->current), NULL, NULL, 0)) return; /* * XXX DefineProperty(element, "__element__", elementstr) */ cb->current = element; } static void EndElementHandler(void *userdata, const char *name) { /* XXX check to be sure that it's the right one ending! */ XMLGraphCallback *cb = (XMLGraphCallback *)userdata; JSContext *cx = cb->cb.cx; jsval rval; if (!JS_GetProperty(cx, cb->current, xmlg_up_str, &rval)) return; cb->current = JSVAL_TO_OBJECT(rval); } static void CharacterDataHandler(void *userdata, const char *s, int len) { XMLGraphCallback *cb = (XMLGraphCallback *)userdata; JSString *str; JSContext *cx = cb->cb.cx; str = JS_NewStringCopyN(cx, s, len); if (!str) return; JS_DefineProperty(cx, cb->current, "__cdata__", STRING_TO_JSVAL(str), NULL, NULL, 0); } static void ProcessingInstructionHandler(void *userdata, const char *target, const char *data) { /* * (cb->obj).processingInstruction(element, target, data) */ } static JSBool PreParse(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval) { XMLGraphCallback *cb; if (!JS_DeleteProperty(cx, obj, "graph")) return JS_FALSE; cb = (XMLGraphCallback *)JS_GetPrivate(cx, obj); if (!cb) return JS_FALSE; cb->current = NULL; return JS_TRUE; } static JSBool XMLGraph(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval) { XMLGraphCallback *cb = JS_malloc(cx, sizeof(XMLGraphCallback)); if (!cb) return JS_FALSE; cb->cb.xml = NULL; cb->cb.obj = obj; cb->cb.cx = cx; cb->current = NULL; cb->nameBy = NULL; cb->cb.start = StartElementHandler; cb->cb.end = EndElementHandler; cb->cb.cdata = CharacterDataHandler; cb->cb.processing = ProcessingInstructionHandler; cb->cb.preParse = PreParse; cb->cb.postParse = NULL; return JS_SetPrivate(cx, obj, (void *)cb); } static void xmlgraph_finalize(JSContext *cx, JSObject *obj) { XMLGraphCallback *cb; cb = (XMLGraphCallback *)JS_GetPrivate(cx, obj); if (!cb) return; if (cb->nameBy) JS_free(cx, cb->nameBy); JS_free(cx, cb); } static JSBool xmlgraph_nameBySetter(JSContext *cx, JSObject *obj, jsval id, jsval *vp) { JSString *namestr; XMLGraphCallback *cb = JS_GetPrivate(cx, obj); if (!cb) return JS_TRUE; if (*vp == JSVAL_NULL) { if (cb->nameBy) JS_free(cx, cb->nameBy); cb->nameBy = NULL; return JS_TRUE; } namestr = JS_ValueToString(cx, *vp); if (!namestr) return JS_FALSE; if (cb->nameBy) JS_free(cx, cb->nameBy); cb->nameBy = JS_strdup(cx, JS_GetStringBytes(namestr)); if (!cb->nameBy) return JS_FALSE; return JS_TRUE; } JSClass XMLGraph_class = { "XMLGraph", JSCLASS_HAS_PRIVATE, JS_PropertyStub, JS_PropertyStub, JS_PropertyStub, JS_PropertyStub, JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, xmlgraph_finalize }; JSFunctionSpec xmlgraph_funcs[] = { {0} }; JSPropertySpec xmlgraph_props[] = { {"nameBy", -1, JSPROP_ENUMERATE, NULL, xmlgraph_nameBySetter}, {0} }; JSBool XMLGraph_Init(JSContext *cx, JSObject *obj, JSObject *parent_proto) { jsval v = JSVAL_NULL; JSObject *proto = JS_InitClass(cx, obj, parent_proto, &XMLGraph_class, XMLGraph, 1, xmlgraph_props, xmlgraph_funcs, NULL, NULL); if (!proto) return JS_FALSE; if (!JS_SetProperty(cx, proto, "nameBy", &v)) { JS_ReportError(cx, "failed to set XMLGraph.prototype.nameBy = null"); return JS_FALSE; } return JS_TRUE; }