1 files changed, 66 insertions, 0 deletions
diff --git a/prev/container_darwin.m b/prev/container_darwin.m
new file mode 100644
index 0000000..7e87cf9
--- /dev/null
+++ b/prev/container_darwin.m
@@ -0,0 +1,66 @@
+// 4 august 2014
+
+#include "objc_darwin.h"
+#include "_cgo_export.h"
+#include <Cocoa/Cocoa.h>
+
+#define toNSView(x) ((NSView *) (x))
+
+// calling -[className] on the content views of NSWindow, NSTabItem, and NSBox all return NSView, so I'm assuming I just need to override these
+// fornunately:
+// - NSWindow resizing calls -[setFrameSize:] (but not -[setFrame:])
+// - NSTab resizing calls both -[setFrame:] and -[setFrameSIze:] on the current tab
+// - NSTab switching tabs calls both -[setFrame:] and -[setFrameSize:] on the new tab
+// so we just override setFrameSize:
+// thanks to mikeash and JtRip in irc.freenode.net/#macdev
+@interface goContainerView : NSView {
+@public
+	void *gocontainer;
+}
+@end
+
+@implementation goContainerView
+
+- (void)setFrameSize:(NSSize)s
+{
+	[super setFrameSize:s];
+	containerResized(self->gocontainer);
+}
+
+@end
+
+id newContainerView(void *gocontainer)
+{
+	goContainerView *c;
+
+	c = [[goContainerView alloc] initWithFrame:NSZeroRect];
+	c->gocontainer = gocontainer;
+	return (id) c;
+}
+
+void moveControl(id c, intptr_t x, intptr_t y, intptr_t width, intptr_t height)
+{
+	NSView *v;
+	NSRect frame;
+
+	frame = NSMakeRect((CGFloat) x, (CGFloat) y, (CGFloat) width, (CGFloat) height);
+	// mac os x coordinate system has (0,0) in the lower-left
+	v = toNSView(c);
+	frame.origin.y = ([[v superview] bounds].size.height - frame.size.height) - frame.origin.y;
+	// here's the magic: what we specified was what we want the alignment rect to be; make it the actual frame
+	frame = [v frameForAlignmentRect:frame];
+	[v setFrame:frame];
+}
+
+struct xrect containerBounds(id view)
+{
+	NSRect b;
+	struct xrect r;
+
+	b = [toNSView(view) bounds];
+	r.x = (intptr_t) b.origin.x;
+	r.y = (intptr_t) b.origin.y;
+	r.width = (intptr_t) b.size.width;
+	r.height = (intptr_t) b.size.height;
+	return r;
+}