Now that we have everything up to and including Buttons up and running, we no longer need the darwintest.
This commit is contained in:
Pietro Gagliardi
parent
4599e0d25e
commit
3e44abc1b8
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/* 28 february 2014 */
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/*
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I wanted to avoid invoking Objective-C directly, preferring to do everything directly with the API. However, there are some things that simply cannot be done too well; for those situations, there's this. It does use the Objective-C runtime, eschewing the actual Objective-C part of this being an Objective-C file.
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The main culprits are:
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- data types listed as being defined in nonexistent headers
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- 32-bit/64-bit type differences that are more than just a different typedef
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Go wrapper functions (bleh_darwin.go) call these directly and take care of stdint.h -> Go type conversions.
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*/
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#include <objc/message.h>
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#include <objc/objc.h>
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#include <objc/runtime.h>
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#include <stdint.h>
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#include <Foundation/NSGeometry.h>
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/*
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NSUInteger is listed as being in <objc/NSObjCRuntime.h>... which doesn't exist. Rather than relying on undocumented header file locations or explicitly typedef-ing NSUInteger to the (documented) unsigned long, I'll just place things here for maximum safety. I use uintptr_t as that should encompass every possible unsigned long.
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*/
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id _objc_msgSend_uint(id obj, SEL sel, uintptr_t a)
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{
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return objc_msgSend(obj, sel, (NSUInteger) a);
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}
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/*
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These are the objc_msgSend() wrappers around NSRect. The problem is that while on 32-bit systems, NSRect is a concrete structure, on 64-bit systems it's just a typedef to CGRect. While in practice just using CGRect everywhere seems to work, better to be safe than sorry.
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I use int64_t for maximum safety, as my coordinates are stored as Go ints and Go int -> C int (which is what is documented as happening) isn't reliable.
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*/
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#define OurRect() (NSMakeRect((CGFloat) x, (CGFloat) y, (CGFloat) w, (CGFloat) h))
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id _objc_msgSend_rect(id obj, SEL sel, int64_t x, int64_t y, int64_t w, int64_t h)
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{
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return objc_msgSend(obj, sel, OurRect());
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}
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id _objc_msgSend_rect_uint_uint_bool(id obj, SEL sel, int64_t x, int64_t y, int64_t w, int64_t h, uintptr_t b, uintptr_t c, BOOL d)
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{
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return objc_msgSend(obj, sel, OurRect(), (NSUInteger) b, (NSUInteger) c, d);
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}
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// 28 february 2014
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package main
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import (
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"fmt"
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)
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// #cgo LDFLAGS: -lobjc -framework Foundation -framework AppKit
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// #include "objc_darwin.h"
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// extern void windowShouldClose(id, SEL, id);
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// extern void buttonClicked(id, SEL, id);
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// extern void gotNotification(id, SEL, id);
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import "C"
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// TODO move these around later
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var (
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_stop = sel_getUid("stop:")
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)
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//export windowShouldClose
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func windowShouldClose(self C.id, sel C.SEL, sender C.id) {
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fmt.Println("-[hello windowShouldClose:]")
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C.objc_msgSend_id(NSApp, _stop, sender)
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}
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//export buttonClicked
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func buttonClicked(self C.id, sel C.SEL, sender C.id) {
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fmt.Println("button clicked; sending notification...")
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notify("button")
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}
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//export gotNotification
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func gotNotification(self C.id, sel C.SEL, object C.id) {
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fmt.Printf("got notification from %s\n", fromNSString(object))
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}
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func mk(name string, selW C.SEL, selB C.SEL, selN C.SEL) C.id {
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class := newClass(name)
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addDelegateMethod(class, selW, C.windowShouldClose)
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addDelegateMethod(class, selB, C.buttonClicked)
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addDelegateMethod(class, selN, C.gotNotification)
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return objc_getClass(name)
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}
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// 27 february 2014
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package main
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import (
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"unsafe"
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)
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// #cgo LDFLAGS: -lobjc -framework Foundation
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// #include <stdlib.h>
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// #include "objc_darwin.h"
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// /* because cgo doesn't like Nil */
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// Class NilClass = Nil;
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import "C"
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var (
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_NSObject_Class = C.object_getClass(_NSObject)
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)
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func newClass(name string) C.Class {
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cname := C.CString(name)
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defer C.free(unsafe.Pointer(cname))
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c := C.objc_allocateClassPair(_NSObject_Class, cname, 0)
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if c == C.NilClass {
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panic("unable to create Objective-C class " + name)
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}
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C.objc_registerClassPair(c)
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return c
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}
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// according to errors spit out by cgo, C function pointers are unsafe.Pointer
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func addDelegateMethod(class C.Class, sel C.SEL, imp unsafe.Pointer) {
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// maps to void (*)(id, SEL, id)
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ty := []C.char{'v', '@', ':', '@', 0}
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// clas methods get stored in the metaclass; the objc_allocateClassPair() docs say this will work
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// metaclass := C.object_getClass(C.id(unsafe.Pointer(class)))
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// we're adding instance methods, so just class will do
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ok := C.class_addMethod(class,
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sel,
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C.IMP(imp),
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&ty[0])
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if ok == C.BOOL(C.NO) {
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panic("unable to add ourMethod")
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}
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}
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// 28 february 2014
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package main
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import (
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"unsafe"
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)
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// #cgo LDFLAGS: -lobjc -framework Foundation
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// #include <stdlib.h>
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// #include "objc_darwin.h"
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import "C"
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func objc_getClass(class string) C.id {
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cclass := C.CString(class)
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defer C.free(unsafe.Pointer(cclass))
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return C.objc_getClass(cclass)
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}
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func sel_getUid(sel string) C.SEL {
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csel := C.CString(sel)
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defer C.free(unsafe.Pointer(csel))
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return C.sel_getUid(csel)
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}
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// Common Objective-C types and selectors.
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var (
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_NSObject = objc_getClass("NSObject")
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_NSString = objc_getClass("NSString")
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_alloc = sel_getUid("alloc")
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_new = sel_getUid("new")
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_release = sel_getUid("release")
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_stringWithUTF8String = sel_getUid("stringWithUTF8String:")
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_UTF8String = sel_getUid("UTF8String")
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)
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// some helper functions
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func objc_alloc(class C.id) C.id {
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return C.objc_msgSend_noargs(class, _alloc)
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}
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func objc_new(class C.id) C.id {
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return C.objc_msgSend_noargs(class, _new)
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}
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func objc_release(obj C.id) {
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C.objc_msgSend_noargs(obj, _release)
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}
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func toNSString(str string) C.id {
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cstr := C.CString(str)
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defer C.free(unsafe.Pointer(cstr))
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return C.objc_msgSend_str(_NSString,
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_stringWithUTF8String,
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cstr)
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}
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func fromNSString(str C.id) string {
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cstr := C.objc_msgSend_noargs(str, _UTF8String)
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return C.GoString((*C.char)(unsafe.Pointer(cstr)))
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}
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/*
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These are wrapper functions for the functions in bleh_darwin.m to wrap around stdint.h type casting.
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*/
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func objc_msgSend_rect(obj C.id, sel C.SEL, x int, y int, w int, h int) C.id {
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return C._objc_msgSend_rect(obj, sel,
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C.int64_t(x), C.int64_t(y), C.int64_t(w), C.int64_t(h))
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}
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func objc_msgSend_uint(obj C.id, sel C.SEL, a uintptr) C.id {
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return C._objc_msgSend_uint(obj, sel, C.uintptr_t(a))
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}
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func objc_msgSend_rect_uint_uint_bool(obj C.id, sel C.SEL, x int, y int, w int, h int, b uintptr, c uintptr, d C.BOOL) C.id {
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return C._objc_msgSend_rect_uint_uint_bool(obj, sel,
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C.int64_t(x), C.int64_t(y), C.int64_t(w), C.int64_t(h),
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C.uintptr_t(b), C.uintptr_t(c), d)
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}
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/* 28 february 2014 */
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/*
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This includes all Objective-C runtime headers for convenience. It also creates wrappers around objc_msgSend() out of necessity.
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cgo doesn't support calling variable argument list C functions, so objc_msgSend() cannot be called directly.
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Furthermore, Objective-C selectors work by basically sending the arguments to objc_msgSend() verbatim across the wire. This basically means we're stuck making wrapper functions for every possible argument list. What fun!
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The format should be self-explanatory.
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*/
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#include <objc/message.h>
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#include <objc/objc.h>
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#include <objc/runtime.h>
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#include <stdint.h>
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inline id objc_msgSend_noargs(id obj, SEL sel)
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{
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return objc_msgSend(obj, sel);
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}
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#define m1(name, type1) \
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inline id objc_msgSend_ ## name (id obj, SEL sel, type1 a) \
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{ \
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return objc_msgSend(obj, sel, a); \
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}
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#define m2(name, type1, type2) \
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inline id objc_msgSend_ ## name (id obj, SEL sel, type1 a, type2 b) \
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{ \
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return objc_msgSend(obj, sel, a, b); \
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}
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#define m3(name, type1, type2, type3) \
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inline id objc_msgSend_ ## name (id obj, SEL sel, type1 a, type2 b, type3 c) \
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{ \
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return objc_msgSend(obj, sel, a, b, c); \
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}
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#define m4(name, type1, type2, type3, type4) \
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inline id objc_msgSend_ ## name (id obj, SEL sel, type1 a, type2 b, type3 c, type4 d) \
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{ \
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return objc_msgSend(obj, sel, a, b, c, d); \
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}
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m1(str, char *) /* TODO Go string? */
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m1(id, id)
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extern id _objc_msgSend_rect(id obj, SEL sel, int64_t x, int64_t y, int64_t w, int64_t h);
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m1(sel, SEL)
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extern id _objc_msgSend_uint(id obj, SEL sel, uintptr_t a);
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m2(id_id, id, id)
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m3(id_id_id, id, id, id)
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m3(sel_id_bool, SEL, id, BOOL)
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extern id _objc_msgSend_rect_uint_uint_bool(id obj, SEL sel, int64_t x, int64_t y, int64_t w, int64_t h, uintptr_t b, uintptr_t c, BOOL d);
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m4(id_sel_id_id, id, SEL, id, id)
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// 27 february 2014
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package main
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import (
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"fmt"
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"time"
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)
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// #cgo LDFLAGS: -lobjc -framework Foundation -framework AppKit
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// #include <stdlib.h>
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// #include "objc_darwin.h"
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import "C"
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var (
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_NSApplication = objc_getClass("NSApplication")
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_sharedApplication = sel_getUid("sharedApplication")
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_run = sel_getUid("run")
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)
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var NSApp C.id
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var delegate C.id
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var notesel C.SEL
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func init() {
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// need an NSApplication first - see https://github.com/TooTallNate/NodObjC/issues/21
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NSApp = C.objc_msgSend_noargs(_NSApplication, _sharedApplication)
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selW := sel_getUid("windowShouldClose:")
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selB := sel_getUid("buttonClicked:")
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selN := sel_getUid("gotNotification:")
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mk("hello", selW, selB, selN)
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delegate = objc_alloc(objc_getClass("hello"))
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notesel = selN
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}
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const (
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NSBorderlessWindowMask = 0
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NSTitledWindowMask = 1 << 0
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NSClosableWindowMask = 1 << 1
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NSMiniaturizableWindowMask = 1 << 2
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NSResizableWindowMask = 1 << 3
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NSTexturedBackgroundWindowMask = 1 << 8
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)
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const (
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// NSBackingStoreRetained = 0 // "You should not use this mode."
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// NSBackingStoreNonretained = 1 // "You should not use this mode."
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NSBackingStoreBuffered = 2
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)
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const (
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NSRoundedBezelStyle = 1
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// TODO copy in the rest?
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)
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var (
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_NSAutoreleasePool = objc_getClass("NSAutoreleasePool")
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_performSelectorOnMainThread =
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sel_getUid("performSelectorOnMainThread:withObject:waitUntilDone:")
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)
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func notify(source string) {
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// we need to make an NSAutoreleasePool, otherwise we get leak warnings on stderr
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pool := objc_new(_NSAutoreleasePool)
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src := toNSString(source)
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C.objc_msgSend_sel_id_bool(
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delegate,
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_performSelectorOnMainThread,
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notesel,
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src,
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C.BOOL(C.YES)) // wait so we can properly drain the autorelease pool; on other platforms we wind up waiting anyway (since the main thread can only handle one thing at a time) so
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objc_release(pool)
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}
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var (
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_NSWindow = objc_getClass("NSWindow")
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_NSButton = objc_getClass("NSButton")
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_initWithContentRect = sel_getUid("initWithContentRect:styleMask:backing:defer:")
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_setDelegate = sel_getUid("setDelegate:")
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_makeKeyAndOrderFront = sel_getUid("makeKeyAndOrderFront:")
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_contentView = sel_getUid("contentView")
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_initWithFrame = sel_getUid("initWithFrame:")
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|
||||||
_setTarget = sel_getUid("setTarget:")
|
|
||||||
_setAction = sel_getUid("setAction:")
|
|
||||||
_setBezelStyle = sel_getUid("setBezelStyle:")
|
|
||||||
_addSubview = sel_getUid("addSubview:")
|
|
||||||
)
|
|
||||||
|
|
||||||
func main() {
|
|
||||||
style := uintptr(NSTitledWindowMask | NSClosableWindowMask)
|
|
||||||
backing := uintptr(NSBackingStoreBuffered)
|
|
||||||
deferx := C.BOOL(C.YES)
|
|
||||||
window := objc_alloc(_NSWindow)
|
|
||||||
window = objc_msgSend_rect_uint_uint_bool(window,
|
|
||||||
_initWithContentRect,
|
|
||||||
100, 100, 320, 240,
|
|
||||||
style, backing, deferx)
|
|
||||||
C.objc_msgSend_id(window, _makeKeyAndOrderFront, window)
|
|
||||||
C.objc_msgSend_id(window, _setDelegate, delegate)
|
|
||||||
windowView := C.objc_msgSend_noargs(window, _contentView)
|
|
||||||
|
|
||||||
button := objc_alloc(_NSButton)
|
|
||||||
button = objc_msgSend_rect(button,
|
|
||||||
_initWithFrame,
|
|
||||||
20, 20, 200, 200)
|
|
||||||
C.objc_msgSend_id(button, _setTarget, delegate)
|
|
||||||
C.objc_msgSend_sel(button,
|
|
||||||
_setAction,
|
|
||||||
sel_getUid("buttonClicked:"))
|
|
||||||
objc_msgSend_uint(button, _setBezelStyle, NSRoundedBezelStyle)
|
|
||||||
C.objc_msgSend_id(windowView, _addSubview, button)
|
|
||||||
|
|
||||||
go func() {
|
|
||||||
for {
|
|
||||||
<-time.After(5 * time.Second)
|
|
||||||
fmt.Println("five seconds passed; sending notification...")
|
|
||||||
notify("timer")
|
|
||||||
}
|
|
||||||
}()
|
|
||||||
|
|
||||||
C.objc_msgSend_noargs(NSApp, _run)
|
|
||||||
}
|
|
||||||
Loading…
Reference in New Issue