Adobe Extending Dreamweaver CS4 Manuel d'utilisateur télécharger pdf (Page 363)

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EXTENDING DREAMWEAVER CS4

C-level extensibility

Returns

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

JSBool JS_ExecuteScript()

Description

This function compiles and executes a JavaScript string. If the script generates a return value, it returns in *rval.

Arguments

JSContext *cx, JSObject *obj, char *script, unsigned intsz, JSVal *rval

• The cx argument is the opaque JSContext pointer that passes to the JavaScript function.

• The obj argument 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. Usually this is the JSObject pointer that passes to the JavaScript function.

• The script argument is a string that contains JavaScript code. If the string size is not specified (see the sz argument),

the string must be null-terminated.

• The sz argument is the size of the string, in bytes. If sz is 0, the length of the null-terminated string is computed

automatically.

• The rval argument is a pointer to a single JSVal structure. The function’s return value is stored in *rval.

Returns

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

JSBool JS_ReportError()

Description

This function describes the reason for a script error. Call this function before returning the value JS_FALSE for a script

error to give the user information about why the script failed (for example, “wrong number of arguments”).

Arguments

JSContext *cx, char *error, size_t sz

• The cx argument is the opaque JSContext pointer that passes to the JavaScript function.

• The error argument is a string that contains the error message. The string is copied, so the caller should free the

string when it is not needed. If the string size is not specified (see the sz argument), the string must be null-

terminated.

• The sz argument is the size of the string, in bytes. If sz is 0, the length of the null-terminated string is computed

automatically.

Returns

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

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Adobe Extending Dreamweaver CS4 Manuel d'utilisateur Page 363