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// 28 february 2014
package ui
import (
"unsafe"
)
// #cgo LDFLAGS: -lobjc -framework Foundation
// #include <stdlib.h>
// #include "objc_darwin.h"
// /* cgo doesn't like Nil */
// Class NilClass = Nil;
import "C"
func objc_getClass(class string) C.id {
cclass := C.CString(class)
defer C.free(unsafe.Pointer(cclass))
return C.objc_getClass(cclass)
}
func sel_getUid(sel string) C.SEL {
csel := C.CString(sel)
defer C.free(unsafe.Pointer(csel))
return C.sel_getUid(csel)
}
// Common Objective-C types and selectors.
var (
_NSObject = objc_getClass("NSObject")
_NSString = objc_getClass("NSString")
_alloc = sel_getUid("alloc")
_new = sel_getUid("new")
_release = sel_getUid("release")
_stringWithUTF8String = sel_getUid("stringWithUTF8String:")
_UTF8String = sel_getUid("UTF8String")
)
func toNSString(str string) C.id {
cstr := C.CString(str)
defer C.free(unsafe.Pointer(cstr))
return C.objc_msgSend_str(_NSString,
_stringWithUTF8String,
cstr)
}
func fromNSString(str C.id) string {
cstr := C.objc_msgSend_noargs(str, _UTF8String)
return C.GoString((*C.char)(unsafe.Pointer(cstr)))
}
// These consolidate the NSScrollView code (used by listbox_darwin.go and area_darwin.go) into a single place.
var (
_NSScrollView = objc_getClass("NSScrollView")
_setHasHorizontalScroller = sel_getUid("setHasHorizontalScroller:")
_setHasVerticalScroller = sel_getUid("setHasVerticalScroller:")
_setAutohidesScrollers = sel_getUid("setAutohidesScrollers:")
_setDocumentView = sel_getUid("setDocumentView:")
_documentView = sel_getUid("documentView")
)
func newScrollView(content C.id) C.id {
scrollview := C.objc_msgSend_noargs(_NSScrollView, _alloc)
scrollview = initWithDummyFrame(scrollview)
C.objc_msgSend_bool(scrollview, _setHasHorizontalScroller, C.BOOL(C.YES))
C.objc_msgSend_bool(scrollview, _setHasVerticalScroller, C.BOOL(C.YES))
C.objc_msgSend_bool(scrollview, _setAutohidesScrollers, C.BOOL(C.YES))
C.objc_msgSend_id(scrollview, _setDocumentView, content)
return scrollview
}
func getScrollViewContent(scrollview C.id) C.id {
return C.objc_msgSend_noargs(scrollview, _documentView)
}
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