Frameworks/AIUtilities Framework/Source/AIBorderlessWindow.m
author Evan Schoenberg
Thu, 14 Nov 2019 21:09:06 -0500
branchadium-1.5.11
changeset 6016 325e2ab3406f
parent 5997 d88e6711d0e0
permissions -rw-r--r--
Fixed a bunch of warnings
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/* 
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 * Adium is the legal property of its developers, whose names are listed in the copyright file included
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 * with this source distribution.
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 * 
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 * This program is free software; you can redistribute it and/or modify it under the terms of the GNU
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 * General Public License as published by the Free Software Foundation; either version 2 of the License,
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 * or (at your option) any later version.
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 * 
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 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
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 * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
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 * Public License for more details.
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 * 
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 * You should have received a copy of the GNU General Public License along with this program; if not,
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 * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
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 */
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//AIBorderlessWindow.m based partially off sample code in CustomWindow.m from Apple's "RoundTransparentWindow" sample project.
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#import "AIBorderlessWindow.h"
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#import "AIEventAdditions.h"
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#define BORDERLESS_WINDOW_DOCKING_DISTANCE 	12	//Distance in pixels before the window is snapped to an edge
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@interface AIBorderlessWindow ()
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- (BOOL)dockWindowFrame:(NSRect *)inFrame toScreenFrame:(NSRect)screenFrame;
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@end
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@implementation AIBorderlessWindow
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- (instancetype)initWithContentRect:(NSRect)contentRect styleMask:(NSWindowStyleMask)style backing:(NSBackingStoreType)backingStoreType defer:(BOOL)flag
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{
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    //Call NSWindow's version of this function, but pass in the all-important value of NSBorderlessWindowMask
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    //for the styleMask so that the window doesn't have a title bar
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   if ((self = [super initWithContentRect:contentRect 
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							styleMask:NSBorderlessWindowMask
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							  backing:NSBackingStoreBuffered 
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									defer:flag])) {
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	   //Set the background color to clear so that we can see through the parts
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	   //of the window into which we're not drawing 
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	   [self setBackgroundColor:[NSColor clearColor]];
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	   inLeftMouseEvent = NO;
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	   moveable = YES;
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   }
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    return self;
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}
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// Custom windows that use the NSBorderlessWindowMask can't become key by default.  Therefore, controls in such windows
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// won't ever be enabled by default.  Thus, we override this method to change that.
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- (BOOL)canBecomeKeyWindow
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{
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    return YES;
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}
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- (BOOL)canBecomeMainWindow
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{
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    return YES;
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}
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- (void)setMoveable:(BOOL)inMoveable
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{
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	moveable = inMoveable;
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}
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- (void)performClose:(id)sender
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{ 
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    BOOL shouldClose = YES;
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	if ([self delegate] && [[self delegate] respondsToSelector:@selector(windowShouldClose:)]) {
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        shouldClose = [(id)[self delegate] windowShouldClose:sender];
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    } else if ([self respondsToSelector:@selector(windowShouldClose:)]) { 
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        shouldClose = [(id)self windowShouldClose:sender];
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	}
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    if (shouldClose) {
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        [self close];
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	}
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}
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//Once the user starts dragging the mouse with command held, we move the window with it. 
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//We do this because the window has no title bar for the user to drag (so we have to implement dragging ourselves)
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- (void)mouseDragged:(NSEvent *)theEvent
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{
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    if (![theEvent cmdKey] && moveable) {
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		NSScreen	*currentScreen;
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        NSPoint		currentLocation, newOrigin;
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        NSRect		newWindowFrame;
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		/* If we get here and aren't yet in a left mouse event, which can happen if the user began dragging while
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		 * a contextual menu is showing, start off from the right position by getting our originalMouseLocation.
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		 */		
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		if (!inLeftMouseEvent) {
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			//grab the mouse location in global coordinates
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			originalMouseLocation = [self convertBaseToScreen:[theEvent locationInWindow]];
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			windowFrame = [self frame];
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			inLeftMouseEvent = YES;		
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		}
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		currentScreen = [self screen];
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		newOrigin = windowFrame.origin;
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		newWindowFrame = windowFrame;
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        //Grab the current mouse location to compare with the location of the mouse when the drag started (stored in mouseDown:)
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        currentLocation = [NSEvent mouseLocation];
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        newOrigin.x += (currentLocation.x - originalMouseLocation.x);
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        newOrigin.y += currentLocation.y - originalMouseLocation.y;
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		//Keep the window from going under the menu bar (on the main screen)
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		NSRect  screenFrame = [currentScreen visibleFrame];
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		if (currentScreen == [[NSScreen screens] objectAtIndex:0]) {
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			if ((newOrigin.y+windowFrame.size.height) > (screenFrame.origin.y+screenFrame.size.height) ) {
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				newOrigin.y = screenFrame.origin.y + (screenFrame.size.height-windowFrame.size.height);
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			}
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		}
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		// Keep the topmost part of the window on the screen (if it goes onto another screen in the process,
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		// that screen should become [self screen] so this check shouldn't fire).
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		if ((newOrigin.y+windowFrame.size.height) < 10 + screenFrame.origin.y ) {
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            newOrigin.y = 10 + screenFrame.origin.y - windowFrame.size.height;
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        }
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		newWindowFrame.origin = newOrigin;
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		//If the user is not pressing shift, attempt to dock this window the the visible frame first, and then to the screen frame
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		if (![theEvent shiftKey]) {
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			[self dockWindowFrame:&newWindowFrame toScreenFrame:[currentScreen visibleFrame]];
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			[self dockWindowFrame:&newWindowFrame toScreenFrame:[currentScreen frame]];
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		}
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		[[NSNotificationCenter defaultCenter] postNotificationName:NSWindowWillMoveNotification object:self];
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		[self setFrameOrigin:newWindowFrame.origin];
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		[[NSNotificationCenter defaultCenter] postNotificationName:NSWindowDidMoveNotification object:self];
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    } else {
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        [super mouseDragged:theEvent];
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    }
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}
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//We start tracking the a drag operation here when the user first clicks the mouse without command presed,
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//to establish the initial location.
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- (void)mouseDown:(NSEvent *)theEvent
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{    
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    if (![theEvent cmdKey] && ([theEvent type] == NSLeftMouseDown) && moveable) {
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        //grab the mouse location in global coordinates
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        originalMouseLocation = [self convertBaseToScreen:[theEvent locationInWindow]];
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		windowFrame = [self frame];
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		inLeftMouseEvent = YES;
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    } else {
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		inLeftMouseEvent = NO;
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        [super mouseDown:theEvent];
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    }
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}
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- (void)mouseUp:(NSEvent *)theEvent
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{
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	inLeftMouseEvent = NO;
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	[super mouseUp:theEvent];
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}
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//Dock the passed window frame if it's close enough to the screen edges
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- (BOOL)dockWindowFrame:(NSRect *)inWindowFrame toScreenFrame:(NSRect)inScreenFrame
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{
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	BOOL	changed = NO;
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	//Left
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    if ((fabs(NSMinX((*inWindowFrame)) - NSMinX(inScreenFrame)) < BORDERLESS_WINDOW_DOCKING_DISTANCE)) {
0
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		(*inWindowFrame).origin.x = inScreenFrame.origin.x;
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		changed = YES;
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	}
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	//Bottom
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    if ((fabs(NSMinY(*inWindowFrame) - NSMinY(inScreenFrame)) < BORDERLESS_WINDOW_DOCKING_DISTANCE)) {
0
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		(*inWindowFrame).origin.y = inScreenFrame.origin.y;
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		changed = YES;
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	}
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	//Right
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    if ((fabs(NSMaxX(*inWindowFrame) - NSMaxX(inScreenFrame)) < BORDERLESS_WINDOW_DOCKING_DISTANCE)) {
0
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		(*inWindowFrame).origin.x -= NSMaxX(*inWindowFrame) - NSMaxX(inScreenFrame);
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		changed = YES;
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	}
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	//Top
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    if ((fabs(NSMaxY(*inWindowFrame) - NSMaxY(inScreenFrame)) < BORDERLESS_WINDOW_DOCKING_DISTANCE)) {
0
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		(*inWindowFrame).origin.y -= NSMaxY(*inWindowFrame) - NSMaxY(inScreenFrame);
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		changed = YES;
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	}
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	return changed;
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}
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@end