Adobe Extending Flash Professional CS5 Uživatelský manuál stáhnout pdf (Strana 557)

100

101

535

EXTENDING FLASH PROFESSIONAL

C-Level Extensibility

Last updated 5/2/2011

typedef JSBool (*JSNative)(JSContext *cx, JSObject *obj, unsigned int argc,

jsval *argv, jsval *rval)

Description

Method; describes C-level implementations of JavaScript functions in the following situations:

• The cx pointer is a pointer to an opaque JSContext structure, which must be passed to some of the functions in

the JavaScript API. This variable holds the interpreter’s execution context.

• The obj pointer is a pointer to the object in whose context the script executes. While the script is running, the this

keyword is equal to this object.

• The argc integer is the number of arguments being passed to the function.

• The argv pointer is a pointer to an array of jsval structures. The array is argc elements in length.

• The rval pointer is a pointer to a single jsval structure. The function’s return value should be written to *rval.

The function returns JS_TRUE if successful; JS_FALSE otherwise. If the function returns JS_FALSE, the current script

stops executing and an error message appears.

JSBool JS_DefineFunction()

Usage

JSBool JS_DefineFunction(unsigned short *name, JSNative call, unsigned int nargs)

Description

Method; registers a C-level function with the JavaScript interpreter in Flash. After the JS_DefineFunction()

function registers the C-level function that you specify in the call argument, you can invoke it in a JavaScript script by

referring to it with the name that you specify in the name argument. The name argument is case-sensitive.

Typically, this function is called from the MM_Init() function, which Flash calls during startup.

Arguments

unsigned short *name, JSNativecall, unsigned int nargs

• The name argument is the name of the function as it is exposed to JavaScript.

• The call argument is a pointer to a C-level function. The function must return a JSBool, which indicates success or

failure.

• The nargs argument is the number of arguments that the function expects to receive.

Returns

A Boolean value: JS_TRUE indicates success; JS_FALSE indicates failure.

unsigned short *JS_ValueToString()

Usage

unsigned short *JS_ValueToString(JSContext *cx, jsval v, unsigned int *pLength)

1 2 ... 552 553 554 555 556 557 558 559 560 561 562 563 564 565

Komentáře k této Příručce

Žádné komentáře

Adobe Extending Flash Professional CS5 Uživatelský manuál Strana 557

Komentáře k této Příručce

Související produkty a manuály pro Software Adobe Extending Flash Professional CS5