First Commit

libui-ng/darwin/fontbutton.m

@@ -0,0 +1,231 @@
+// 14 april 2016
+#import "uipriv_darwin.h"
+#import "attrstr.h"
+
+@interface uiprivFontButton : NSButton {
+	uiFontButton *libui_b;
+	NSFont *libui_font;
+}
+- (id)initWithFrame:(NSRect)frame libuiFontButton:(uiFontButton *)b;
+- (void)updateFontButtonLabel;
+- (IBAction)fontButtonClicked:(id)sender;
+- (void)activateFontButton;
+- (void)deactivateFontButton:(BOOL)activatingAnother;
+- (void)deactivateOnClose:(NSNotification *)note;
+- (void)getfontdesc:(uiFontDescriptor *)uidesc;
+@end
+
+// only one may be active at one time
+static uiprivFontButton *activeFontButton = nil;
+
+struct uiFontButton {
+	uiDarwinControl c;
+	uiprivFontButton *button;
+	void (*onChanged)(uiFontButton *, void *);
+	void *onChangedData;
+};
+
+@implementation uiprivFontButton
+
+- (id)initWithFrame:(NSRect)frame libuiFontButton:(uiFontButton *)b
+{
+	self = [super initWithFrame:frame];
+	if (self) {
+		self->libui_b = b;
+
+		// imitate a NSColorWell in appearance
+		[self setButtonType:NSPushOnPushOffButton];
+		[self setBordered:YES];
+		[self setBezelStyle:NSShadowlessSquareBezelStyle];
+
+		// default font values according to the CTFontDescriptor reference
+		// this is autoreleased (thanks swillits in irc.freenode.net/#macdev)
+		self->libui_font = [[NSFont fontWithName:@"Helvetica" size:12.0] retain];
+		[self updateFontButtonLabel];
+
+		// for when clicked
+		[self setTarget:self];
+		[self setAction:@selector(fontButtonClicked:)];
+	}
+	return self;
+}
+
+- (void)dealloc
+{
+	// clean up notifications
+	if (activeFontButton == self)
+		[self deactivateFontButton:NO];
+	[self->libui_font release];
+	[super dealloc];
+}
+
+- (void)updateFontButtonLabel
+{
+	NSString *title;
+
+	title = [NSString stringWithFormat:@"%@ %g",
+		[self->libui_font displayName],
+		[self->libui_font pointSize]];
+	[self setTitle:title];
+}
+
+- (IBAction)fontButtonClicked:(id)sender
+{
+	if ([self state] == NSOnState)
+		[self activateFontButton];
+	else
+		[self deactivateFontButton:NO];
+}
+
+- (void)activateFontButton
+{
+	NSFontManager *sfm;
+
+	sfm = [NSFontManager sharedFontManager];
+	if (activeFontButton != nil)
+		[activeFontButton deactivateFontButton:YES];
+	[sfm setTarget:self];
+	[sfm setSelectedFont:self->libui_font isMultiple:NO];
+	[sfm orderFrontFontPanel:self];
+	activeFontButton = self;
+	[[NSNotificationCenter defaultCenter] addObserver:self
+		selector:@selector(deactivateOnClose:)
+		name:NSWindowWillCloseNotification
+		object:[NSFontPanel sharedFontPanel]];
+	[self setState:NSOnState];
+}
+
+- (void)deactivateFontButton:(BOOL)activatingAnother
+{
+	NSFontManager *sfm;
+
+	sfm = [NSFontManager sharedFontManager];
+	[sfm setTarget:nil];
+	if (!activatingAnother)
+		[[NSFontPanel sharedFontPanel] orderOut:self];
+	activeFontButton = nil;
+	[[NSNotificationCenter defaultCenter] removeObserver:self
+		name:NSWindowWillCloseNotification
+		object:[NSFontPanel sharedFontPanel]];
+	[self setState:NSOffState];
+}
+
+- (void)deactivateOnClose:(NSNotification *)note
+{
+	[self deactivateFontButton:NO];
+}
+
+- (void)changeFont:(id)sender
+{
+	NSFontManager *fm;
+	NSFont *old;
+	uiFontButton *b = self->libui_b;
+
+	fm = (NSFontManager *) sender;
+	old = self->libui_font;
+	self->libui_font = [sender convertFont:self->libui_font];
+	// do this even if it returns the same; we don't own anything that isn't from a new or alloc/init
+	[self->libui_font retain];
+	// do this second just in case
+	[old release];
+	[self updateFontButtonLabel];
+	(*(b->onChanged))(b, b->onChangedData);
+}
+
+- (NSUInteger)validModesForFontPanel:(NSFontPanel *)panel
+{
+	return NSFontPanelFaceModeMask |
+		NSFontPanelSizeModeMask |
+		NSFontPanelCollectionModeMask;
+}
+
+- (void)getfontdesc:(uiFontDescriptor *)uidesc
+{
+	CTFontRef ctfont;
+	CTFontDescriptorRef ctdesc;
+
+	ctfont = (CTFontRef) (self->libui_font);
+	ctdesc = CTFontCopyFontDescriptor(ctfont);
+	uiprivFontDescriptorFromCTFontDescriptor(ctdesc, uidesc);
+	CFRelease(ctdesc);
+	uidesc->Size = CTFontGetSize(ctfont);
+}
+
+@end
+
+uiDarwinControlAllDefaults(uiFontButton, button)
+
+// we do not want font change events to be sent to any controls other than the font buttons
+// see main.m for more details
+BOOL uiprivFontButtonInhibitSendAction(SEL sel, id from, id to)
+{
+	if (sel != @selector(changeFont:))
+		return NO;
+	return ![to isKindOfClass:[uiprivFontButton class]];
+}
+
+// we do not want NSFontPanelValidation messages to be sent to any controls other than the font buttons when a font button is active
+// see main.m for more details
+BOOL uiprivFontButtonOverrideTargetForAction(SEL sel, id from, id to, id *override)
+{
+	if (activeFontButton == nil)
+		return NO;
+	if (sel != @selector(validModesForFontPanel:))
+		return NO;
+	*override = activeFontButton;
+	return YES;
+}
+
+// we also don't want the panel to be usable when there's a dialog running; see stddialogs.m for more details on that
+// unfortunately the panel seems to ignore -setWorksWhenModal: so we'll have to do things ourselves
+@interface uiprivNonModalFontPanel : NSFontPanel
+@end
+
+@implementation uiprivNonModalFontPanel
+
+- (BOOL)worksWhenModal
+{
+	return NO;
+}
+
+@end
+
+void uiprivSetupFontPanel(void)
+{
+	[NSFontManager setFontPanelFactory:[uiprivNonModalFontPanel class]];
+}
+
+static void defaultOnChanged(uiFontButton *b, void *data)
+{
+	// do nothing
+}
+
+void uiFontButtonFont(uiFontButton *b, uiFontDescriptor *desc)
+{
+	[b->button getfontdesc:desc];
+}
+
+void uiFontButtonOnChanged(uiFontButton *b, void (*f)(uiFontButton *, void *), void *data)
+{
+	b->onChanged = f;
+	b->onChangedData = data;
+}
+
+uiFontButton *uiNewFontButton(void)
+{
+	uiFontButton *b;
+
+	uiDarwinNewControl(uiFontButton, b);
+
+	b->button = [[uiprivFontButton alloc] initWithFrame:NSZeroRect libuiFontButton:b];
+	uiDarwinSetControlFont(b->button, NSRegularControlSize);
+
+	uiFontButtonOnChanged(b, defaultOnChanged, NULL);
+
+	return b;
+}
+
+void uiFreeFontButtonFont(uiFontDescriptor *desc)
+{
+	uiFreeFontDescriptor(desc);
+}