gtk2/gdk/quartz/gdkcursor-quartz.c
Pietro Gagliardi 3c8b80dce2 Implemented most of the GDK named cursors on Mac OS X.
Only "wait" and "all-scroll" are not implemented properly. OS X does not
seem to have a proper interface to either cursor. Approximations are used
instead; see the code.

See bug 749178.
2015-05-16 17:11:44 -04:00

499 lines
13 KiB
C

/* gdkcursor-quartz.c
*
* Copyright (C) 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/>.
*/
#include "config.h"
#include "gdkdisplay.h"
#include "gdkcursor.h"
#include "gdkcursorprivate.h"
#include "gdkquartzcursor.h"
#include "gdkprivate-quartz.h"
#include "xcursors.h"
struct _GdkQuartzCursor
{
GdkCursor cursor;
NSCursor *nscursor;
};
struct _GdkQuartzCursorClass
{
GdkCursorClass cursor_class;
};
static GdkCursor *cached_xcursors[G_N_ELEMENTS (xcursors)];
static GdkCursor *
gdk_quartz_cursor_new_from_nscursor (NSCursor *nscursor,
GdkCursorType cursor_type)
{
GdkQuartzCursor *private;
private = g_object_new (GDK_TYPE_QUARTZ_CURSOR,
"cursor-type", cursor_type,
"display", _gdk_display,
NULL);
private->nscursor = nscursor;
return GDK_CURSOR (private);
}
static GdkCursor *
create_blank_cursor (void)
{
NSCursor *nscursor;
NSImage *nsimage;
NSSize size = { 1.0, 1.0 };
nsimage = [[NSImage alloc] initWithSize:size];
nscursor = [[NSCursor alloc] initWithImage:nsimage
hotSpot:NSMakePoint(0.0, 0.0)];
[nsimage release];
return gdk_quartz_cursor_new_from_nscursor (nscursor, GDK_BLANK_CURSOR);
}
static gboolean
get_bit (const guchar *data,
gint width,
gint height,
gint x,
gint y)
{
gint bytes_per_line;
const guchar *src;
if (x < 0 || y < 0 || x >= width || y >= height)
return FALSE;
bytes_per_line = (width + 7) / 8;
src = &data[y * bytes_per_line];
return ((src[x / 8] >> x % 8) & 1);
}
static GdkCursor *
create_builtin_cursor (GdkCursorType cursor_type)
{
GdkCursor *cursor;
NSBitmapImageRep *bitmap_rep;
NSInteger mask_width, mask_height;
gint src_width, src_height;
gint dst_stride;
const guchar *mask_start, *src_start;
gint dx, dy;
gint x, y;
NSPoint hotspot;
NSImage *image;
NSCursor *nscursor;
if (cursor_type >= G_N_ELEMENTS (xcursors) || cursor_type < 0)
return NULL;
cursor = cached_xcursors[cursor_type];
if (cursor)
return cursor;
GDK_QUARTZ_ALLOC_POOL;
src_width = xcursors[cursor_type].width;
src_height = xcursors[cursor_type].height;
mask_width = xcursors[cursor_type+1].width;
mask_height = xcursors[cursor_type+1].height;
bitmap_rep = [[NSBitmapImageRep alloc] initWithBitmapDataPlanes:NULL
pixelsWide:mask_width pixelsHigh:mask_height
bitsPerSample:8 samplesPerPixel:4
hasAlpha:YES isPlanar:NO colorSpaceName:NSDeviceRGBColorSpace
bytesPerRow:0 bitsPerPixel:0];
dst_stride = [bitmap_rep bytesPerRow];
src_start = xcursors[cursor_type].bits;
mask_start = xcursors[cursor_type+1].bits;
dx = xcursors[cursor_type+1].hotx - xcursors[cursor_type].hotx;
dy = xcursors[cursor_type+1].hoty - xcursors[cursor_type].hoty;
for (y = 0; y < mask_height; y++)
{
guchar *dst = [bitmap_rep bitmapData] + y * dst_stride;
for (x = 0; x < mask_width; x++)
{
if (get_bit (mask_start, mask_width, mask_height, x, y))
{
if (get_bit (src_start, src_width, src_height, x - dx, y - dy))
{
*dst++ = 0;
*dst++ = 0;
*dst++ = 0;
}
else
{
*dst++ = 0xff;
*dst++ = 0xff;
*dst++ = 0xff;
}
*dst++ = 0xff;
}
else
{
*dst++ = 0;
*dst++ = 0;
*dst++ = 0;
*dst++ = 0;
}
}
}
image = [[NSImage alloc] init];
[image addRepresentation:bitmap_rep];
[bitmap_rep release];
hotspot = NSMakePoint (xcursors[cursor_type+1].hotx,
xcursors[cursor_type+1].hoty);
nscursor = [[NSCursor alloc] initWithImage:image hotSpot:hotspot];
[image release];
cursor = gdk_quartz_cursor_new_from_nscursor (nscursor, GDK_CURSOR_IS_PIXMAP);
cached_xcursors[cursor_type] = g_object_ref (cursor);
GDK_QUARTZ_RELEASE_POOL;
return cursor;
}
GdkCursor*
_gdk_quartz_display_get_cursor_for_type (GdkDisplay *display,
GdkCursorType cursor_type)
{
NSCursor *nscursor;
g_return_val_if_fail (display == gdk_display_get_default (), NULL);
switch (cursor_type)
{
case GDK_XTERM:
nscursor = [NSCursor IBeamCursor];
break;
case GDK_SB_H_DOUBLE_ARROW:
nscursor = [NSCursor resizeLeftRightCursor];
break;
case GDK_SB_V_DOUBLE_ARROW:
nscursor = [NSCursor resizeUpDownCursor];
break;
case GDK_SB_UP_ARROW:
case GDK_BASED_ARROW_UP:
case GDK_BOTTOM_TEE:
case GDK_TOP_SIDE:
nscursor = [NSCursor resizeUpCursor];
break;
case GDK_SB_DOWN_ARROW:
case GDK_BASED_ARROW_DOWN:
case GDK_TOP_TEE:
case GDK_BOTTOM_SIDE:
nscursor = [NSCursor resizeDownCursor];
break;
case GDK_SB_LEFT_ARROW:
case GDK_RIGHT_TEE:
case GDK_LEFT_SIDE:
nscursor = [NSCursor resizeLeftCursor];
break;
case GDK_SB_RIGHT_ARROW:
case GDK_LEFT_TEE:
case GDK_RIGHT_SIDE:
nscursor = [NSCursor resizeRightCursor];
break;
case GDK_TCROSS:
case GDK_CROSS:
case GDK_CROSSHAIR:
case GDK_DIAMOND_CROSS:
nscursor = [NSCursor crosshairCursor];
break;
case GDK_HAND1:
case GDK_HAND2:
nscursor = [NSCursor pointingHandCursor];
break;
case GDK_CURSOR_IS_PIXMAP:
return NULL;
case GDK_BLANK_CURSOR:
return create_blank_cursor ();
default:
return g_object_ref (create_builtin_cursor (cursor_type));
}
[nscursor retain];
return gdk_quartz_cursor_new_from_nscursor (nscursor, cursor_type);
}
GdkCursor *
_gdk_quartz_display_get_cursor_for_surface (GdkDisplay *display,
cairo_surface_t *surface,
gdouble x,
gdouble y)
{
NSImage *image;
NSCursor *nscursor;
GdkCursor *cursor;
GdkPixbuf *pixbuf;
GDK_QUARTZ_ALLOC_POOL;
pixbuf = gdk_pixbuf_get_from_surface (surface, 0, 0,
cairo_image_surface_get_width (surface),
cairo_image_surface_get_height (surface));
image = gdk_quartz_pixbuf_to_ns_image_libgtk_only (pixbuf);
nscursor = [[NSCursor alloc] initWithImage:image hotSpot:NSMakePoint(x, y)];
cursor = gdk_quartz_cursor_new_from_nscursor (nscursor, GDK_CURSOR_IS_PIXMAP);
g_object_unref (pixbuf);
GDK_QUARTZ_RELEASE_POOL;
return cursor;
}
/* OS X only exports a number of cursor types in its public NSCursor interface.
* By overriding the private _coreCursorType method, we can tell OS X to load
* one of its internal cursors instead (since cursor images are loaded on demand
* instead of in advance). WebKit does this too.
*/
@interface gdkCoreCursor : NSCursor {
@private
int type;
BOOL override;
}
@end
@implementation gdkCoreCursor
- (int)_coreCursorType
{
if (self->override)
return self->type;
return [super _coreCursorType];
}
#define CUSTOM_CURSOR_CTOR(name, id) \
+ (instancetype)name \
{ \
gdkCoreCursor *obj; \
obj = [self new]; \
if (obj) { \
obj->override = YES; \
obj->type = id; \
} \
return obj; \
}
CUSTOM_CURSOR_CTOR(gdkHelpCursor, 40)
CUSTOM_CURSOR_CTOR(gdkProgressCursor, 4)
/* TODO OS X doesn't seem to have a way to get this. There is an undocumented
* method +[NSCursor _waitCursor], but it doesn't actually return this cursor,
* but rather some odd low-quality non-animating version of this cursor. Use
* the progress cursor instead for now.
*/
CUSTOM_CURSOR_CTOR(gdkWaitCursor, 4)
CUSTOM_CURSOR_CTOR(gdkAliasCursor, 2)
CUSTOM_CURSOR_CTOR(gdkMoveCursor, 39)
/* TODO OS X doesn't seem to provide one; copy the move cursor for now
* since it looks similar to what we want. */
CUSTOM_CURSOR_CTOR(gdkAllScrollCursor, 39)
CUSTOM_CURSOR_CTOR(gdkNEResizeCursor, 29)
CUSTOM_CURSOR_CTOR(gdkNWResizeCursor, 33)
CUSTOM_CURSOR_CTOR(gdkSEResizeCursor, 35)
CUSTOM_CURSOR_CTOR(gdkSWResizeCursor, 37)
CUSTOM_CURSOR_CTOR(gdkEWResizeCursor, 28)
CUSTOM_CURSOR_CTOR(gdkNSResizeCursor, 32)
CUSTOM_CURSOR_CTOR(gdkNESWResizeCursor, 30)
CUSTOM_CURSOR_CTOR(gdkNWSEResizeCursor, 34)
CUSTOM_CURSOR_CTOR(gdkZoomInCursor, 42)
CUSTOM_CURSOR_CTOR(gdkZoomOutCursor, 43)
@end
struct CursorsByName {
const gchar *name;
NSString *selector;
};
static const struct CursorsByName cursors_by_name[] = {
/* Link & Status */
{ "context-menu", @"contextualMenuCursor" },
{ "help", @"gdkHelpCursor" },
{ "pointer", @"pointingHandCursor" },
{ "progress", @"gdkProgressCursor" },
{ "wait", @"gdkWaitCursor" },
/* Selection */
{ "cell", @"crosshairCursor" },
{ "crosshair", @"crosshairCursor" },
{ "text", @"IBeamCursor" },
{ "vertical-text", @"IBeamCursorForVerticalLayout" },
/* Drag & Drop */
{ "alias", @"gdkAliasCursor" },
{ "copy", @"dragCopyCursor" },
{ "move", @"gdkMoveCursor" },
{ "no-drop", @"operationNotAllowedCursor" },
{ "not-allowed", @"operationNotAllowedCursor" },
{ "grab", @"openHandCursor" },
{ "grabbing", @"closedHandCursor" },
/* Resize & Scrolling */
{ "all-scroll", @"gdkAllScrollCursor" },
{ "col-resize", @"resizeLeftRightCursor" },
{ "row-resize", @"resizeUpDownCursor" },
{ "n-resize", @"resizeUpCursor" },
{ "e-resize", @"resizeRightCursor" },
{ "s-resize", @"resizeDownCursor" },
{ "w-resize", @"resizeLeftCursor" },
{ "ne-resize", @"gdkNEResizeCursor" },
{ "nw-resize", @"gdkNWResizeCursor" },
{ "se-resize", @"gdkSEResizeCursor" },
{ "sw-resize", @"gdkSWResizeCursor" },
{ "ew-resize", @"gdkEWResizeCursor" },
{ "ns-resize", @"gdkNSResizeCursor" },
{ "nesw-resize", @"gdkNESWResizeCursor" },
{ "nwse-resize", @"gdkNWSEResizeCursor" },
/* Zoom */
{ "zoom-in", @"gdkZoomInCursor" },
{ "zoom-out", @"gdkZoomOutCursor" },
{ NULL, NULL },
};
GdkCursor*
_gdk_quartz_display_get_cursor_for_name (GdkDisplay *display,
const gchar *name)
{
NSCursor *nscursor;
const struct CursorsByName *test;
SEL selector;
if (name == NULL || g_str_equal (name, "none"))
return create_blank_cursor ();
// use this selector if nothing found
selector = @selector(arrowCursor);
for (test = cursors_by_name; test->name != NULL; test++)
if (g_str_equal (name, test->name))
{
selector = NSSelectorFromString(test->selector);
break;
}
nscursor = [[gdkCoreCursor class] performSelector:selector];
[nscursor retain];
return gdk_quartz_cursor_new_from_nscursor (nscursor, GDK_CURSOR_IS_PIXMAP);
}
G_DEFINE_TYPE (GdkQuartzCursor, gdk_quartz_cursor, GDK_TYPE_CURSOR)
static cairo_surface_t *gdk_quartz_cursor_get_surface (GdkCursor *cursor,
gdouble *x_hot,
gdouble *y_hot);
static void
gdk_quartz_cursor_finalize (GObject *object)
{
GdkQuartzCursor *private = GDK_QUARTZ_CURSOR (object);
if (private->nscursor)
[private->nscursor release];
private->nscursor = NULL;
}
static void
gdk_quartz_cursor_class_init (GdkQuartzCursorClass *quartz_cursor_class)
{
GdkCursorClass *cursor_class = GDK_CURSOR_CLASS (quartz_cursor_class);
GObjectClass *object_class = G_OBJECT_CLASS (quartz_cursor_class);
object_class->finalize = gdk_quartz_cursor_finalize;
cursor_class->get_surface = gdk_quartz_cursor_get_surface;
}
static void
gdk_quartz_cursor_init (GdkQuartzCursor *cursor)
{
}
gboolean
_gdk_quartz_display_supports_cursor_alpha (GdkDisplay *display)
{
return TRUE;
}
gboolean
_gdk_quartz_display_supports_cursor_color (GdkDisplay *display)
{
return TRUE;
}
void
_gdk_quartz_display_get_default_cursor_size (GdkDisplay *display,
guint *width,
guint *height)
{
/* Mac OS X doesn't have the notion of a default size */
*width = 32;
*height = 32;
}
void
_gdk_quartz_display_get_maximal_cursor_size (GdkDisplay *display,
guint *width,
guint *height)
{
/* Cursor sizes in Mac OS X can be arbitrarily large */
*width = 65536;
*height = 65536;
}
NSCursor *
_gdk_quartz_cursor_get_ns_cursor (GdkCursor *cursor)
{
GdkQuartzCursor *cursor_private;
if (!cursor)
return [NSCursor arrowCursor];
g_return_val_if_fail (GDK_IS_QUARTZ_CURSOR (cursor), NULL);
cursor_private = GDK_QUARTZ_CURSOR (cursor);
return cursor_private->nscursor;
}
static cairo_surface_t *
gdk_quartz_cursor_get_surface (GdkCursor *cursor,
gdouble *x_hot,
gdouble *y_hot)
{
/* FIXME: Implement */
return NULL;
}