Implemented uiOpenFile() and uiSaveFile() on OS X.

redo/reredo/darwin/stddialogs.m

@@ -1,16 +1,48 @@
 // 26 june 2015
 #import "uipriv_darwin.h"
 
+// TODO is whether extensions are shown a Finder setting?
+static void setupSavePanel(NSSavePanel *s)
+{
+	[s setCanCreateDirectories:YES];
+	[s setShowsHiddenFiles:YES];
+	[s setExtensionHidden:NO];
+	[s setCanSelectHiddenExtension:NO];
+	[s setTreatsFilePackagesAsDirectories:YES];
+}
+
+static char *runSavePanel(NSSavePanel *s)
+{
+	char *filename;
+
+	if ([s runModal] != NSFileHandlingPanelOKButton)
+		return NULL;
+	filename = uiDarwinNSStringToText([[s URL] path]);
+	return filename;
+}
+
 char *uiOpenFile(void)
 {
-	// TODO
-	return NULL;
+	NSOpenPanel *o;
+
+	o = [NSOpenPanel openPanel];
+	[o setCanChooseFiles:YES];
+	[o setCanChooseDirectories:NO];
+	[o setResolvesAliases:NO];
+	[o setAllowsMultipleSelection:NO];
+	setupSavePanel(o);
+	// panel is autoreleased
+	return runSavePanel(o);
 }
 
 char *uiSaveFile(void)
 {
-	// TODO
-	return NULL;
+	NSSavePanel *s;
+
+	s = [NSSavePanel savePanel];
+	setupSavePanel(s);
+	// panel is autoreleased
+	return runSavePanel(s);
 }
 
 void uiMsgBox(const char *title, const char *description)