/*JSON{
"type" : "method",
"class" : "Object",
"name" : "removeAllListeners",
"generate" : "jswrap_object_removeAllListeners",
"params" : [
["event","JsVar","The name of the event, for instance 'data'"]
]
}
Removes all listeners, or those of the specified event.
*/
void jswrap_object_removeAllListeners(JsVar *parent, JsVar *event) {
if (!jsvHasChildren(parent)) {
jsWarn("Parent must be an object - not a String, Integer, etc.");
return;
}
if (jsvIsString(event)) {
// remove the whole child containing listeners
JsVar *eventName = jsvVarPrintf(JS_EVENT_PREFIX"%s",event);
if (!eventName) return; // no memory
JsVar *eventList = jsvFindChildFromVar(parent, eventName, true);
jsvUnLock(eventName);
if (eventList) {
jsvRemoveChild(parent, eventList);
jsvUnLock(eventList);
}
} else if (jsvIsUndefined(event)) {
// Eep. We must remove everything beginning with '#on' (JS_EVENT_PREFIX)
JsvObjectIterator it;
jsvObjectIteratorNew(&it, parent);
while (jsvObjectIteratorHasValue(&it)) {
JsVar *key = jsvObjectIteratorGetKey(&it);
jsvObjectIteratorNext(&it);
if (jsvIsStringEqualOrStartsWith(key, JS_EVENT_PREFIX, true)) {
// begins with #on - we must kill it
jsvRemoveChild(parent, key);
}
jsvUnLock(key);
}
jsvObjectIteratorFree(&it);
} else {
jsWarn("First argument to EventEmitter.removeAllListeners(..) must be a string, or undefined");
return;
}
}
/*JSON{
"type" : "method",
"class" : "Object",
"name" : "hasOwnProperty",
"generate" : "jswrap_object_hasOwnProperty",
"params" : [
["name","JsVar","The name of the property to search for"]
],
"return" : ["bool","True if it exists, false if it doesn't"]
}
Return true if the object (not its prototype) has the given property.
NOTE: This currently returns false-positives for built-in functions in prototypes
*/
bool jswrap_object_hasOwnProperty(JsVar *parent, JsVar *name) {
JsVar *propName = jsvAsArrayIndex(name);
bool contains = false;
if (jsvHasChildren(parent)) {
JsVar *foundVar = jsvFindChildFromVar(parent, propName, false);
if (foundVar) {
contains = true;
jsvUnLock(foundVar);
}
}
if (!contains && !jsvIsObject(parent)) {
/* search builtin symbol table, but not for Objects, as these
* are descended from Objects but do not themselves contain
* an Object's properties */
const JswSymList *symbols = jswGetSymbolListForObject(parent);
if (symbols) {
char str[32];
jsvGetString(propName, str, sizeof(str));
JsVar *v = jswBinarySearch(symbols, parent, str);
if (v) contains = true;
jsvUnLock(v);
}
}
jsvUnLock(propName);
return contains;
}
/*JSON{
"type" : "method",
"class" : "Object",
"name" : "removeListener",
"generate" : "jswrap_object_removeListener",
"params" : [
["event","JsVar","The name of the event, for instance 'data'"],
["listener","JsVar","The listener to remove"]
]
}
Removes the specified event listener.
```
function foo(d) {
console.log(d);
}
Serial1.on("data", foo);
Serial1.removeListener("data", foo);
```
*/
void jswrap_object_removeListener(JsVar *parent, JsVar *event, JsVar *callback) {
if (!jsvHasChildren(parent)) {
jsWarn("Parent must be an object - not a String, Integer, etc.");
return;
}
if (jsvIsString(event)) {
// remove the whole child containing listeners
JsVar *eventName = jsvVarPrintf(JS_EVENT_PREFIX"%s",event);
if (!eventName) return; // no memory
JsVar *eventListName = jsvFindChildFromVar(parent, eventName, true);
jsvUnLock(eventName);
JsVar *eventList = jsvSkipName(eventListName);
if (eventList) {
if (eventList == callback) {
// there's no array, it was a single item
jsvRemoveChild(parent, eventListName);
} else if (jsvIsArray(eventList)) {
// it's an array, search for the index
JsVar *idx = jsvGetArrayIndexOf(eventList, callback, true);
if (idx) {
jsvRemoveChild(eventList, idx);
jsvUnLock(idx);
}
}
jsvUnLock(eventList);
}
jsvUnLock(eventListName);
} else {
jsWarn("First argument to EventEmitter.removeListener(..) must be a string");
return;
}
}
/*JSON{
"type" : "method",
"class" : "Object",
"name" : "emit",
"generate" : "jswrap_object_emit",
"params" : [
["event","JsVar","The name of the event, for instance 'data'"],
["args","JsVarArray","Optional arguments"]
]
}
Call the event listeners for this object, for instance ```http.emit('data', 'Foo')```. See Node.js's EventEmitter.
*/
void jswrap_object_emit(JsVar *parent, JsVar *event, JsVar *argArray) {
if (!jsvHasChildren(parent)) {
jsWarn("Parent must be an object - not a String, Integer, etc.");
return;
}
if (!jsvIsString(event)) {
jsWarn("First argument to EventEmitter.emit(..) must be a string");
return;
}
char eventName[16];
if (!jswrap_object_get_event_name(eventName, event)) return;
// extract data
const unsigned int MAX_ARGS = 4;
JsVar *args[MAX_ARGS];
unsigned int n = 0;
JsvObjectIterator it;
jsvObjectIteratorNew(&it, argArray);
while (jsvObjectIteratorHasValue(&it)) {
if (n>=MAX_ARGS) {
jsWarn("Too many arguments");
break;
}
args[n++] = jsvObjectIteratorGetValue(&it);
jsvObjectIteratorNext(&it);
}
jsvObjectIteratorFree(&it);
jsiQueueObjectCallbacks(parent, eventName, args, (int)n);
// unlock
jsvUnLockMany(n, args);
}
/*JSON{
"type" : "method",
"class" : "Object",
"name" : "on",
"generate" : "jswrap_object_on",
"params" : [
["event","JsVar","The name of the event, for instance 'data'"],
["listener","JsVar","The listener to call when this event is received"]
]
}
Register an event listener for this object, for instance ```http.on('data', function(d) {...})```. See Node.js's EventEmitter.
*/
void jswrap_object_on(JsVar *parent, JsVar *event, JsVar *listener) {
if (!jsvHasChildren(parent)) {
jsWarn("Parent must be an object - not a String, Integer, etc.");
return;
}
if (!jsvIsString(event)) {
jsWarn("First argument to EventEmitter.on(..) must be a string");
return;
}
if (!jsvIsFunction(listener) && !jsvIsString(listener)) {
jsWarn("Second argument to EventEmitter.on(..) must be a function or a String (containing code)");
return;
}
JsVar *eventName = jsvVarPrintf(JS_EVENT_PREFIX"%s",event);
if (!eventName) return; // no memory
JsVar *eventList = jsvFindChildFromVar(parent, eventName, true);
jsvUnLock(eventName);
JsVar *eventListeners = jsvSkipName(eventList);
if (jsvIsUndefined(eventListeners)) {
// just add
jsvSetValueOfName(eventList, listener);
} else {
if (jsvIsArray(eventListeners)) {
// we already have an array, just add to it
jsvArrayPush(eventListeners, listener);
} else {
// not an array - we need to make it an array
JsVar *arr = jsvNewEmptyArray();
jsvArrayPush(arr, eventListeners);
jsvArrayPush(arr, listener);
jsvSetValueOfName(eventList, arr);
jsvUnLock(arr);
}
}
jsvUnLock2(eventListeners, eventList);
/* Special case if we're a data listener and data has already arrived then
* we queue an event immediately. */
if (jsvIsStringEqual(event, "data")) {
JsVar *buf = jsvObjectGetChild(parent, STREAM_BUFFER_NAME, 0);
if (jsvIsString(buf)) {
jsiQueueObjectCallbacks(parent, STREAM_CALLBACK_NAME, &buf, 1);
jsvRemoveNamedChild(parent, STREAM_BUFFER_NAME);
}
jsvUnLock(buf);
}
}
/*JSON{ "type":"method", "class": "Object", "name" : "hasOwnProperty",
"description" : ["Return true if the object (not its prototype) has the given property.","NOTE: This currently returns false-positives for built-in functions in prototypes"],
"generate" : "jswrap_object_hasOwnProperty",
"params" : [ [ "name", "JsVar", "The name of the property to search for"] ],
"return" : ["bool", "True if it exists, false if it doesn't"]
}*/
bool jswrap_object_hasOwnProperty(JsVar *parent, JsVar *name) {
char str[32];
jsvGetString(name, str, sizeof(str));
bool contains = false;
if (jsvHasChildren(parent)) {
JsVar *foundVar = jsvFindChildFromString(parent, str, false);
if (foundVar) {
contains = true;
jsvUnLock(foundVar);
}
}
if (!contains) { // search builtins
JsVar *foundVar = jswFindBuiltInFunction(parent, str);
if (foundVar) {
contains = true;
jsvUnLock(foundVar);
}
}
return contains;
}
/*JSON{
"type" : "method",
"class" : "Object",
"name" : "emit",
"generate" : "jswrap_object_emit",
"params" : [
["event","JsVar","The name of the event, for instance 'data'"],
["args","JsVarArray","Optional arguments"]
]
}
Call the event listeners for this object, for instance ```http.emit('data', 'Foo')```. See Node.js's EventEmitter.
*/
void jswrap_object_emit(JsVar *parent, JsVar *event, JsVar *argArray) {
if (!jsvHasChildren(parent)) {
jsWarn("Parent must be an object - not a String, Integer, etc.");
return;
}
if (!jsvIsString(event)) {
jsWarn("First argument to EventEmitter.emit(..) must be a string");
return;
}
JsVar *eventName = jsvVarPrintf(JS_EVENT_PREFIX"%s",event);
if (!eventName) return; // no memory
// extract data
const unsigned int MAX_ARGS = 4;
JsVar *args[MAX_ARGS];
unsigned int n = 0;
JsvObjectIterator it;
jsvObjectIteratorNew(&it, argArray);
while (jsvObjectIteratorHasValue(&it)) {
if (n>=MAX_ARGS) {
jsWarn("Too many arguments");
break;
}
args[n++] = jsvObjectIteratorGetValue(&it);
jsvObjectIteratorNext(&it);
}
jsvObjectIteratorFree(&it);
JsVar *callback = jsvSkipNameAndUnLock(jsvFindChildFromVar(parent, eventName, 0));
jsvUnLock(eventName);
if (callback) jsiQueueEvents(parent, callback, args, (int)n);
jsvUnLock(callback);
// unlock
jsvUnLockMany(n, args);
}
void jsfGetJSONWithCallback(JsVar *var, JSONFlags flags, const char *whitespace, vcbprintf_callback user_callback, void *user_data) {
JSONFlags nflags = flags + JSON_INDENT; // if we add a newline, make sure we indent any subsequent JSON more
if (!whitespace) whitespace=" ";
if (jsvIsUndefined(var)) {
cbprintf(user_callback, user_data, "undefined");
} else {
// Use IS_RECURSING flag to stop recursion
if (var->flags & JSV_IS_RECURSING) {
cbprintf(user_callback, user_data, " ... ");
return;
}
var->flags |= JSV_IS_RECURSING;
if (jsvIsArray(var)) {
JsVarInt length = jsvGetArrayLength(var);
bool limited = (flags&JSON_LIMIT) && (length>(JsVarInt)JSON_LIMIT_AMOUNT);
bool needNewLine = false;
cbprintf(user_callback, user_data, (flags&JSON_PRETTY)?"[ ":"[");
JsVarInt lastIndex = -1;
bool numeric = true;
bool first = true;
JsvObjectIterator it;
jsvObjectIteratorNew(&it, var);
while (lastIndex+1<length && numeric && !jspIsInterrupted()) {
JsVar *key = jsvObjectIteratorGetKey(&it);
if (!jsvObjectIteratorHasValue(&it) || jsvIsNumeric(key)) {
JsVarInt index = jsvObjectIteratorHasValue(&it) ? jsvGetInteger(key) : length-1;
JsVar *item = jsvObjectIteratorGetValue(&it);
while (lastIndex < index) {
lastIndex++;
if (!limited || lastIndex<(JsVarInt)JSON_LIMITED_AMOUNT || lastIndex>=length-(JsVarInt)JSON_LIMITED_AMOUNT) {
if (!first) cbprintf(user_callback, user_data, (flags&JSON_PRETTY)?", ":",");
first = false;
if (limited && lastIndex==length-(JsVarInt)JSON_LIMITED_AMOUNT) cbprintf(user_callback, user_data, JSON_LIMIT_TEXT);
bool newNeedsNewLine = ((flags&JSON_SOME_NEWLINES) && jsonNeedsNewLine(item));
if (flags&JSON_ALL_NEWLINES) {
needNewLine = true;
newNeedsNewLine = true;
}
if (needNewLine || newNeedsNewLine) {
jsonNewLine(nflags, whitespace, user_callback, user_data);
needNewLine = false;
}
if (lastIndex == index)
jsfGetJSONWithCallback(item, nflags, whitespace, user_callback, user_data);
else
cbprintf(user_callback, user_data, (flags&JSON_NO_UNDEFINED)?"null":"undefined");
needNewLine = newNeedsNewLine;
}
}
jsvUnLock(item);
jsvObjectIteratorNext(&it);
} else {
numeric = false;
}
jsvUnLock(key);
}
// non-numeric - but NOT for standard JSON
if ((flags&JSON_PRETTY))
jsfGetJSONForObjectItWithCallback(&it, flags, whitespace, nflags, user_callback, user_data, first);
jsvObjectIteratorFree(&it);
if (needNewLine) jsonNewLine(flags, whitespace, user_callback, user_data);
cbprintf(user_callback, user_data, (flags&JSON_PRETTY)?" ]":"]");
} else if (jsvIsArrayBuffer(var)) {
JsvArrayBufferIterator it;
bool allZero = true;
jsvArrayBufferIteratorNew(&it, var, 0);
while (jsvArrayBufferIteratorHasElement(&it)) {
if (jsvArrayBufferIteratorGetFloatValue(&it)!=0)
allZero = false;
jsvArrayBufferIteratorNext(&it);
}
jsvArrayBufferIteratorFree(&it);
bool asArray = flags&JSON_ARRAYBUFFER_AS_ARRAY;
if (allZero && !asArray) {
cbprintf(user_callback, user_data, "new %s(%d)", jswGetBasicObjectName(var), jsvGetArrayBufferLength(var));
} else {
const char *aname = jswGetBasicObjectName(var);
/* You can't do `new ArrayBuffer([1,2,3])` so we have to output
* `new Uint8Array([1,2,3]).buffer`! */
bool isBasicArrayBuffer = strcmp(aname,"ArrayBuffer")==0;
if (isBasicArrayBuffer) {
aname="Uint8Array";
}
cbprintf(user_callback, user_data, asArray?"[":"new %s([", aname);
if (flags&JSON_ALL_NEWLINES) jsonNewLine(nflags, whitespace, user_callback, user_data);
size_t length = jsvGetArrayBufferLength(var);
bool limited = (flags&JSON_LIMIT) && (length>JSON_LIMIT_AMOUNT);
// no newlines needed for array buffers as they only contain simple stuff
jsvArrayBufferIteratorNew(&it, var, 0);
while (jsvArrayBufferIteratorHasElement(&it) && !jspIsInterrupted()) {
if (!limited || it.index<JSON_LIMITED_AMOUNT || it.index>=length-JSON_LIMITED_AMOUNT) {
if (it.index>0) cbprintf(user_callback, user_data, (flags&JSON_PRETTY)?", ":",");
if (flags&JSON_ALL_NEWLINES) jsonNewLine(nflags, whitespace, user_callback, user_data);
if (limited && it.index==length-JSON_LIMITED_AMOUNT) cbprintf(user_callback, user_data, JSON_LIMIT_TEXT);
JsVar *item = jsvArrayBufferIteratorGetValue(&it);
jsfGetJSONWithCallback(item, nflags, whitespace, user_callback, user_data);
jsvUnLock(item);
}
jsvArrayBufferIteratorNext(&it);
}
if (flags&JSON_ALL_NEWLINES) jsonNewLine(flags, whitespace, user_callback, user_data);
jsvArrayBufferIteratorFree(&it);
cbprintf(user_callback, user_data, asArray?"]":"])");
if (isBasicArrayBuffer && !asArray) cbprintf(user_callback, user_data, ".buffer");
}
} else if (jsvIsObject(var)) {
IOEventFlags device = (flags & JSON_SHOW_DEVICES) ? jsiGetDeviceFromClass(var) : EV_NONE;
if (device!=EV_NONE) {
cbprintf(user_callback, user_data, "%s", jshGetDeviceString(device));
} else {
bool showContents = true;
if (flags & JSON_SHOW_OBJECT_NAMES) {
JsVar *proto = jsvObjectGetChild(var, JSPARSE_INHERITS_VAR, 0);
if (jsvHasChildren(proto)) {
JsVar *constr = jsvObjectGetChild(proto, JSPARSE_CONSTRUCTOR_VAR, 0);
if (constr) {
JsVar *p = jsvGetIndexOf(execInfo.root, constr, true);
if (p) cbprintf(user_callback, user_data, "%v: ", p);
jsvUnLock2(p,constr);
/* We had the constructor - now if there was a non-default toString function
* we'll execute it and print the result */
JsVar *toStringFn = jspGetNamedField(var, "toString", false);
if (toStringFn && toStringFn->varData.native.ptr != (void (*)(void))jswrap_object_toString) {
// Function found and it's not the default one - execute it
JsVar *result = jspExecuteFunction(toStringFn,var,0,0);
cbprintf(user_callback, user_data, "%v", result);
jsvUnLock(result);
showContents = false; // we already printed something
}
jsvUnLock(toStringFn);
}
}
jsvUnLock(proto);
}
if (showContents) {
JsvObjectIterator it;
jsvObjectIteratorNew(&it, var);
cbprintf(user_callback, user_data, (flags&JSON_PRETTY)?"{ ":"{");
bool needNewLine = jsfGetJSONForObjectItWithCallback(&it, flags, whitespace, nflags, user_callback, user_data, true);
jsvObjectIteratorFree(&it);
if (needNewLine) jsonNewLine(flags, whitespace, user_callback, user_data);
cbprintf(user_callback, user_data, (flags&JSON_PRETTY)?" }":"}");
}
}
} else if (jsvIsFunction(var)) {
if (flags & JSON_IGNORE_FUNCTIONS) {
cbprintf(user_callback, user_data, "undefined");
} else {
cbprintf(user_callback, user_data, "function ");
jsfGetJSONForFunctionWithCallback(var, nflags, user_callback, user_data);
}
} else if (jsvIsString(var) && !jsvIsName(var)) {
if ((flags&JSON_LIMIT) && jsvGetStringLength(var)>JSON_LIMIT_STRING_AMOUNT) {
// if the string is too big, split it and put dots in the middle
JsVar *var1 = jsvNewFromStringVar(var, 0, JSON_LIMITED_STRING_AMOUNT);
JsVar *var2 = jsvNewFromStringVar(var, jsvGetStringLength(var)-JSON_LIMITED_STRING_AMOUNT, JSON_LIMITED_STRING_AMOUNT);
cbprintf(user_callback, user_data, "%q%s%q", var1, JSON_LIMIT_TEXT, var2);
jsvUnLock2(var1, var2);
} else {
cbprintf(user_callback, user_data, "%q", var);
}
} else {
cbprintf(user_callback, user_data, "%v", var);
}
var->flags &= ~JSV_IS_RECURSING;
}
}