Previously, Cappuccino was using preprocessor macros internally for the CGPoint/Size/Rect/Inset/Affine functions, as well as for CPRange. These macros had the same name as the corresponding function, but began with _. The functions were actually defined using the macros.
The motivation behind using macros was to increase performance by reducing function calls. However, there were a number of problems with this approach:
- There was an artificial dichotomy between _CG macros and the corresponding CG functions. We never completely replaced CG function calls with _CG macros. In fact, they were often mixed up in the same file. There was an extra burden on the programmer to remember to use the macro instead of the function.
- If a method call was passed as an argument to a macro, performance could actually be significantly *worse* than a function call. For example, _CGGetRectMakeCopy([view frame]) would expand to `{ origin:{ x:[view frame].origin.x, y:[view frame].origin.y }, size:{ width:[view frame].size.width, height:[view frame].size.height } }`. So instead of a single objj_msgSend and a single simple function call, we ended up with 4 objj_msgSend calls, which are way more expensive than simple function calls.
- Because of this expansion problem, to use macros efficiently required us to remember to use variables for all macro parameters. This didn't happen, and shouldn't have to happen.
- Finally, with modern Javascript engines, function call overhead is so small that it really isn't worth using the macros.
This commit eliminates the _CGGeometry, CGAffineTransformation and CPRange macros and replaces them with function calls.
BREAKING CHANGE:
The macros are no longer available. They could only be used with compiled code, but if there is any user code that used them, they will have to be replaced with the corresponding functions.
- Get the scroller orientation from the xib.
- Fix the nonsensical calculation of _isVertical when given bounds.
- Since orientation comes from the xib, had to re-nib2cib everything to be safe.
-scrollerOverlay is called in -reflectScrolledClipRect and creating this new
object is VERY expensive, according to my profiling.
This should speed up scrolling across the board!
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Adds -scrollViewWillScroll: and -scrollviewDidScroll: delegate methods to CPScrollView.
These methods are not in AppKit but exist in UIKit. Useful for lazy loading data in a view, for example a CPTableview.
Tested in the CPScrollView example.
Conflicts:
AppKit/CPScrollView.j
CPScroller: send action when dragging starts instead of immediately on mouse down.
Test: added delegate methods to the top-left scroll view in CPScrollView example and log.
Antoine Mercadal
Christophe Serafin
Saikat Chakrabarti
Martin Carlberg
Aparajita Fishman
Alexander Ljungberg
Randall Luecke
Aparajita Fishman
Alexandre Wilhelm
Alexander Ljungberg
Blair Duncan
Antoine Mercadal
cacaodev
Francisco Ryan Tolmasky I
Klaas Pieter Annema
Ross Boucher