The Tor Browser: widget/cocoa/nsCursorManager.mm@7e26c7da4463 (annotated)

widget/cocoa/nsCursorManager.mm@7e26c7da4463 (annotated)

widget/cocoa/nsCursorManager.mm

Wed, 31 Dec 2014 06:55:50 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:55:50 +0100
changeset 2: 7e26c7da4463
permissions: -rw-r--r--

Added tag UPSTREAM_283F7C6 for changeset ca08bd8f51b2

 /* 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 CGFloat sCursorScaleFactor = 0.0f;
 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:
     {
       return [nsMacCursor cursorWithCursor:[NSCursor busyButClickableCursor] 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 scaleFactor: (CGFloat) scaleFactor
 {
   NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;
   // As the user moves the mouse, this gets called repeatedly with the same aCursorImage
   if (sCursorImgContainer == aCursorImage && sCursorScaleFactor == scaleFactor && 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, scaleFactor);
   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;
   sCursorScaleFactor = scaleFactor;
   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

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widget/cocoa/nsCursorManager.mm@7e26c7da4463 (annotated)

widget/cocoa/nsCursorManager.mm