gecko-dev/widget/cocoa/nsCursorManager.mm

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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "imgIContainer.h"
#include "nsCocoaUtils.h"
#include "nsCursorManager.h"
#include "nsObjCExceptions.h"
#include <math.h>
static nsCursorManager *gInstance;
static imgIContainer *sCursorImgContainer = nullptr;
static const nsCursor sCustomCursor = eCursorCount;
/*! @category nsCursorManager(PrivateMethods)
Private methods for the cursor manager class.
*/
@interface nsCursorManager(PrivateMethods)
/*! @method getCursor:
@abstract Get a reference to the native Mac representation of a cursor.
@discussion Gets a reference to the Mac native implementation of a cursor.
If the cursor has been requested before, it is retreived from the cursor cache,
otherwise it is created and cached.
@param aCursor the cursor to get
@result the Mac native implementation of the cursor
*/
- (nsMacCursor *) getCursor: (nsCursor) aCursor;
/*! @method setMacCursor:
@abstract Set the current Mac native cursor
@discussion Sets the current cursor - this routine is what actually causes the cursor to change.
The argument is retained and the old cursor is released.
@param aMacCursor the cursor to set
@result NS_OK
*/
- (nsresult) setMacCursor: (nsMacCursor*) aMacCursor;
/*! @method createCursor:
@abstract Create a Mac native representation of a cursor.
@discussion Creates a version of the Mac native representation of this cursor
@param aCursor the cursor to create
@result the Mac native implementation of the cursor
*/
+ (nsMacCursor *) createCursor: (enum nsCursor) aCursor;
@end
@implementation nsCursorManager
+ (nsCursorManager *) sharedInstance
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
if (!gInstance) {
gInstance = [[nsCursorManager alloc] init];
}
return gInstance;
NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
}
+ (void) dispose
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
[gInstance release];
gInstance = nil;
NS_OBJC_END_TRY_ABORT_BLOCK;
}
+ (nsMacCursor *) createCursor: (enum nsCursor) aCursor
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
switch(aCursor)
{
SEL cursorSelector;
case eCursor_standard:
return [nsMacCursor cursorWithCursor:[NSCursor arrowCursor] type:aCursor];
case eCursor_wait:
case eCursor_spinning:
{
NSCursor* cursor1 = [nsMacCursor cocoaCursorWithImageNamed:@"spin1" hotSpot:NSMakePoint(1.0, 1.0)];
NSCursor* cursor2 = [nsMacCursor cocoaCursorWithImageNamed:@"spin2" hotSpot:NSMakePoint(1.0, 1.0)];
NSCursor* cursor3 = [nsMacCursor cocoaCursorWithImageNamed:@"spin3" hotSpot:NSMakePoint(1.0, 1.0)];
NSCursor* cursor4 = [nsMacCursor cocoaCursorWithImageNamed:@"spin4" hotSpot:NSMakePoint(1.0, 1.0)];
NSArray* spinCursorFrames = [[[NSArray alloc] initWithObjects:cursor1, cursor2, cursor3, cursor4, nil] autorelease];
return [nsMacCursor cursorWithFrames:spinCursorFrames type:aCursor];
}
case eCursor_select:
return [nsMacCursor cursorWithCursor:[NSCursor IBeamCursor] type:aCursor];
case eCursor_hyperlink:
return [nsMacCursor cursorWithCursor:[NSCursor pointingHandCursor] type:aCursor];
case eCursor_crosshair:
return [nsMacCursor cursorWithCursor:[NSCursor crosshairCursor] type:aCursor];
case eCursor_move:
return [nsMacCursor cursorWithImageNamed:@"move" hotSpot:NSMakePoint(12,12) type:aCursor];
case eCursor_help:
return [nsMacCursor cursorWithImageNamed:@"help" hotSpot:NSMakePoint(12,12) type:aCursor];
case eCursor_copy:
cursorSelector = @selector(dragCopyCursor);
return [nsMacCursor cursorWithCursor:[NSCursor respondsToSelector:cursorSelector] ?
[NSCursor performSelector:cursorSelector] :
[NSCursor arrowCursor] type:aCursor];
case eCursor_alias:
cursorSelector = @selector(dragLinkCursor);
return [nsMacCursor cursorWithCursor:[NSCursor respondsToSelector:cursorSelector] ?
[NSCursor performSelector:cursorSelector] :
[NSCursor arrowCursor] type:aCursor];
case eCursor_context_menu:
cursorSelector = @selector(contextualMenuCursor);
return [nsMacCursor cursorWithCursor:[NSCursor respondsToSelector:cursorSelector] ?
[NSCursor performSelector:cursorSelector] :
[NSCursor arrowCursor] type:aCursor];
case eCursor_cell:
return [nsMacCursor cursorWithImageNamed:@"cell" hotSpot:NSMakePoint(12,12) type:aCursor];
case eCursor_grab:
return [nsMacCursor cursorWithCursor:[NSCursor openHandCursor] type:aCursor];
case eCursor_grabbing:
return [nsMacCursor cursorWithCursor:[NSCursor closedHandCursor] type:aCursor];
case eCursor_zoom_in:
return [nsMacCursor cursorWithImageNamed:@"zoomIn" hotSpot:NSMakePoint(10,10) type:aCursor];
case eCursor_zoom_out:
return [nsMacCursor cursorWithImageNamed:@"zoomOut" hotSpot:NSMakePoint(10,10) type:aCursor];
case eCursor_vertical_text:
return [nsMacCursor cursorWithImageNamed:@"vtIBeam" hotSpot:NSMakePoint(12,11) type:aCursor];
case eCursor_all_scroll:
return [nsMacCursor cursorWithCursor:[NSCursor openHandCursor] type:aCursor];
case eCursor_not_allowed:
case eCursor_no_drop:
cursorSelector = @selector(operationNotAllowedCursor);
return [nsMacCursor cursorWithCursor:[NSCursor respondsToSelector:cursorSelector] ?
[NSCursor performSelector:cursorSelector] :
[NSCursor arrowCursor] type:aCursor];
// Resize Cursors:
// North
case eCursor_n_resize:
return [nsMacCursor cursorWithCursor:[NSCursor resizeUpCursor] type:aCursor];
// North East
case eCursor_ne_resize:
return [nsMacCursor cursorWithImageNamed:@"sizeNE" hotSpot:NSMakePoint(12,11) type:aCursor];
// East
case eCursor_e_resize:
return [nsMacCursor cursorWithCursor:[NSCursor resizeRightCursor] type:aCursor];
// South East
case eCursor_se_resize:
return [nsMacCursor cursorWithImageNamed:@"sizeSE" hotSpot:NSMakePoint(12,12) type:aCursor];
// South
case eCursor_s_resize:
return [nsMacCursor cursorWithCursor:[NSCursor resizeDownCursor] type:aCursor];
// South West
case eCursor_sw_resize:
return [nsMacCursor cursorWithImageNamed:@"sizeSW" hotSpot:NSMakePoint(10,12) type:aCursor];
// West
case eCursor_w_resize:
return [nsMacCursor cursorWithCursor:[NSCursor resizeLeftCursor] type:aCursor];
// North West
case eCursor_nw_resize:
return [nsMacCursor cursorWithImageNamed:@"sizeNW" hotSpot:NSMakePoint(11,11) type:aCursor];
// North & South
case eCursor_ns_resize:
return [nsMacCursor cursorWithCursor:[NSCursor resizeUpDownCursor] type:aCursor];
// East & West
case eCursor_ew_resize:
return [nsMacCursor cursorWithCursor:[NSCursor resizeLeftRightCursor] type:aCursor];
// North East & South West
case eCursor_nesw_resize:
return [nsMacCursor cursorWithImageNamed:@"sizeNESW" hotSpot:NSMakePoint(12,12) type:aCursor];
// North West & South East
case eCursor_nwse_resize:
return [nsMacCursor cursorWithImageNamed:@"sizeNWSE" hotSpot:NSMakePoint(12,12) type:aCursor];
// Column Resize
case eCursor_col_resize:
return [nsMacCursor cursorWithImageNamed:@"colResize" hotSpot:NSMakePoint(12,12) type:aCursor];
// Row Resize
case eCursor_row_resize:
return [nsMacCursor cursorWithImageNamed:@"rowResize" hotSpot:NSMakePoint(12,12) type:aCursor];
default:
return [nsMacCursor cursorWithCursor:[NSCursor arrowCursor] type:aCursor];
}
NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
}
- (id) init
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
if ((self = [super init])) {
mCursors = [[NSMutableDictionary alloc] initWithCapacity:25];
}
return self;
NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
}
- (nsresult) setCursor: (enum nsCursor) aCursor
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;
// Some plugins mess with our cursors and set a cursor that even
// [NSCursor currentCursor] doesn't know about. In case that happens, just
// reset the state.
[[NSCursor currentCursor] set];
nsCursor oldType = [mCurrentMacCursor type];
if (oldType != aCursor) {
if (aCursor == eCursor_none) {
[NSCursor hide];
} else if (oldType == eCursor_none) {
[NSCursor unhide];
}
}
[self setMacCursor:[self getCursor:aCursor]];
// if a custom cursor was previously set, release sCursorImgContainer
if (oldType == sCustomCursor) {
NS_IF_RELEASE(sCursorImgContainer);
}
return NS_OK;
NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}
- (nsresult) setMacCursor: (nsMacCursor*) aMacCursor
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;
if (mCurrentMacCursor != aMacCursor || ![mCurrentMacCursor isSet]) {
[aMacCursor retain];
[mCurrentMacCursor unset];
[aMacCursor set];
[mCurrentMacCursor release];
mCurrentMacCursor = aMacCursor;
}
return NS_OK;
NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}
- (nsresult) setCursorWithImage: (imgIContainer*) aCursorImage hotSpotX: (uint32_t) aHotspotX hotSpotY: (uint32_t) aHotspotY
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;
// As the user moves the mouse, this gets called repeatedly with the same aCursorImage
if (sCursorImgContainer == aCursorImage && mCurrentMacCursor) {
[self setMacCursor:mCurrentMacCursor];
return NS_OK;
}
[[NSCursor currentCursor] set];
int32_t width = 0, height = 0;
aCursorImage->GetWidth(&width);
aCursorImage->GetHeight(&height);
// prevent DoS attacks
if (width > 128 || height > 128) {
return NS_OK;
}
NSImage *cursorImage;
nsresult rv = nsCocoaUtils::CreateNSImageFromImageContainer(aCursorImage, imgIContainer::FRAME_FIRST, &cursorImage);
if (NS_FAILED(rv) || !cursorImage) {
return NS_ERROR_FAILURE;
}
// if the hotspot is nonsensical, make it 0,0
aHotspotX = (aHotspotX > (uint32_t)width - 1) ? 0 : aHotspotX;
aHotspotY = (aHotspotY > (uint32_t)height - 1) ? 0 : aHotspotY;
NSPoint hotSpot = ::NSMakePoint(aHotspotX, aHotspotY);
[self setMacCursor:[nsMacCursor cursorWithCursor:[[NSCursor alloc] initWithImage:cursorImage hotSpot:hotSpot] type:sCustomCursor]];
[cursorImage release];
NS_IF_RELEASE(sCursorImgContainer);
sCursorImgContainer = aCursorImage;
NS_ADDREF(sCursorImgContainer);
return NS_OK;
NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
}
- (nsMacCursor *) getCursor: (enum nsCursor) aCursor
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL;
nsMacCursor * result = [mCursors objectForKey:[NSNumber numberWithInt:aCursor]];
if (!result) {
result = [nsCursorManager createCursor:aCursor];
[mCursors setObject:result forKey:[NSNumber numberWithInt:aCursor]];
}
return result;
NS_OBJC_END_TRY_ABORT_BLOCK_NIL;
}
- (void) dealloc
{
NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
[mCurrentMacCursor unset];
[mCurrentMacCursor release];
[mCursors release];
NS_IF_RELEASE(sCursorImgContainer);
[super dealloc];
NS_OBJC_END_TRY_ABORT_BLOCK;
}
@end