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/* GdkMacosCairoView.c
*
* Copyright © 2020 Red Hat, Inc.
* Copyright © 2005-2007 Imendio AB
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include "config.h"
#include <CoreGraphics/CoreGraphics.h>
#include <cairo-quartz.h>
#include "gdkinternals.h"
#import "GdkMacosCairoView.h"
#import "GdkMacosCairoSubview.h"
#include "gdkmacossurface-private.h"
@implementation GdkMacosCairoView
-(void)dealloc
{
g_clear_pointer (&self->opaque, g_ptr_array_unref);
self->transparent = NULL;
[super dealloc];
}
-(BOOL)isOpaque
{
if ([self window])
return [[self window] isOpaque];
return YES;
}
-(BOOL)isFlipped
{
return YES;
}
-(void)setNeedsDisplay:(BOOL)needsDisplay
{
for (id child in [self subviews])
[child setNeedsDisplay:needsDisplay];
}
-(void)setCairoSurface:(cairo_surface_t *)cairoSurface
withDamage:(cairo_region_t *)cairoRegion
{
for (id view in [self subviews])
[(GdkMacosCairoSubview *)view setCairoSurface:cairoSurface
withDamage:cairoRegion];
}
-(void)removeOpaqueChildren
{
[[self->transparent subviews]
makeObjectsPerformSelector:@selector(removeFromSuperview)];
if (self->opaque->len)
g_ptr_array_remove_range (self->opaque, 0, self->opaque->len);
}
-(void)setOpaqueRegion:(cairo_region_t *)region
{
cairo_region_t *transparent_clip;
NSRect abs_bounds;
guint n_rects;
if (region == NULL)
return;
abs_bounds = [self convertRect:[self bounds] toView:nil];
n_rects = cairo_region_num_rectangles (region);
/* First, we create a clip region for the transparent region to use so that
* we dont end up exposing too much other than the corners on CSD.
*/
transparent_clip = cairo_region_create_rectangle (&(cairo_rectangle_int_t) {
abs_bounds.origin.x, abs_bounds.origin.y,
abs_bounds.size.width, abs_bounds.size.height
});
cairo_region_subtract (transparent_clip, region);
[(GdkMacosCairoSubview *)self->transparent setClip:transparent_clip];
cairo_region_destroy (transparent_clip);
/* The common case (at least for opaque windows and CSD) is that we will
* have either one or two opaque rectangles. If we detect that the same
* number of them are available as the previous, we can just resize the
* previous ones to avoid adding/removing views at a fast rate while
* resizing.
*/
if (n_rects == self->opaque->len)
{
for (guint i = 0; i < n_rects; i++)
{
GdkMacosCairoSubview *child;
cairo_rectangle_int_t rect;
child = g_ptr_array_index (self->opaque, i);
cairo_region_get_rectangle (region, i, &rect);
[child setFrame:NSMakeRect (rect.x - abs_bounds.origin.x,
rect.y - abs_bounds.origin.y,
rect.width,
rect.height)];
}
return;
}
[self removeOpaqueChildren];
for (guint i = 0; i < n_rects; i++)
{
GdkMacosCairoSubview *child;
cairo_rectangle_int_t rect;
NSRect nsrect;
cairo_region_get_rectangle (region, i, &rect);
nsrect = NSMakeRect (rect.x - abs_bounds.origin.x,
rect.y - abs_bounds.origin.y,
rect.width,
rect.height);
child = [[GdkMacosCairoSubview alloc] initWithFrame:nsrect];
[child setOpaque:YES];
[child setWantsLayer:YES];
[self->transparent addSubview:child];
g_ptr_array_add (self->opaque, child);
}
}
-(NSView *)initWithFrame:(NSRect)frame
{
if ((self = [super initWithFrame:frame]))
{
/* An array to track all the opaque children placed into
* the child self->transparent. This allows us to reuse them
* when we receive a new opaque area instead of discarding
* them on each draw.
*/
self->opaque = g_ptr_array_new ();
/* Setup our primary subview which will render all content that is not
* within an opaque region (such as shadows for CSD windows). For opaque
* windows, this will all be obscurred by other views, so it doesn't
* matter much to have it here.
*/
self->transparent = [[GdkMacosCairoSubview alloc] initWithFrame:frame];
[self addSubview:self->transparent];
}
return self;
}
-(void)setFrame:(NSRect)rect
{
[super setFrame:rect];
[self->transparent setFrame:NSMakeRect (0, 0, rect.size.width, rect.size.height)];
}
-(BOOL)acceptsFirstMouse
{
return YES;
}
-(BOOL)mouseDownCanMoveWindow
{
return NO;
}
@end
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