OS X doesn't have the same concept of maximized windows as Windows does.
There's no mode that prevents a normally-movable window from being moved. If
a window is "zoomed", it mostly fills the screen but the user can still move
or resize it, at which point it ceases to be in the zoomed state. So, users
are confused and frustrated when they can't move a window that's maximized.
To get similar behavior while still respecting Win32 semantics, we detect when
the user tries to move a maximized window. When they start, a request is
submitted to the app to restore the window. Unless and until the window is
restored, we don't actually allow the window to move.
The user expects to move the window from its current (maximized) position. It
should not jump to its normal position upon being restored. So, we set the
window's normal position to its current position before restoring it.
OS X doesn't have the same concept of maximized windows as Windows does.
There's no mode that prevents a normally-resizable window from being resized.
If a window is "zoomed", it mostly fills the screen but the user can still
move or resize it, at which point it ceases to be in the zoomed state. So,
users are confused and frustrated when they can't resize a window that's
maximized.
To get similar behavior while still respecting Win32 semantics, we now let the
user try to resize maximized windows. (The resize cursors are shown at the
edges of the window frame.) When they start, a request is submitted to the app
to restore the window. Unless and until the window is restored, we don't
actually allow the window to change its size.
The user expects to resize the window from its current (maximized) position.
It should not jump to its normal position upon being restored. So, we set the
window's normal position to its current position before restoring it.
OS X doesn't really have the concept of windows being maximized; that is, being
in a mode where they can't be moved or resized. As a consequence, it doesn't
have a button in the window title bar to restore a maximized window to normal.
So, when a Wine window is maximized, the Mac driver hijacks the green zoom
button to act as a restore button. (When a window is zoomed, the green button
"unzooms" back to its last user size and position, so it's analogous.)
However, with OS X 10.10 (Yosemite), the green button prefers to act as a
toggle for the Cocoa full-screen mode rather than zooming and unzooming. This
made it difficult for users to restore a maximized window. They would have to
Option-click the green button, double-click the title bar, or choose Zoom
from the Window menu, none of which is obvious.
The fix is to disable Cocoa full-screen mode for maximized windows. Then, the
green button reverts to unzoom and restoring the window.
Status items are the things on the right end of the Mac menu bar, like the
clock and volume widget. It turns out that they are displayed at a higher
window level than everything else in the menu bar. For the case where the
displays are not captured for a full-screen window, the window ends up at the
same window level as the status items, and they would sometimes end up on top.
They would draw over the full-screen window and could be clicked.
On high-resolution Retina displays, the OS X window backing store has twice the
pixels as Wine's window backing store. So, our images get scaled up. Core
Graphics had been interpolating/smoothing the image, which resulted in
fuzziness. This tells it not to do that.
I had assumed this wouldn't be necessary since we pass FALSE for the
shouldInterpolate parameter of CGImageCreate() when we create the images.
Apparently, that's not sufficient.
When a window is being dragged, we prevent delivery of clicks to Wine. We were
also preventing telling Wine that a window had been brought forward, but this
was incorrect. It prevented clicks in the title bar from activating the window.
If the mouse is captured, we change which window receives the click event, but
that shouldn't change which window we tell Wine was brought forward by Cocoa.
We can't prevent Cocoa from bringing disabled/no-activate windows forward. So,
we need to tell Wine about the z-order change.
We still do avoid telling Wine to activate disabled/no-activate windows, though.
For some empty RECTs, such as { INT_MAX, INT_MAX, INT_MIN, INT_MIN }, right
minus left or bottom minus top underflow and wrap around to positive values.
On Yosemite, in full-screen mode, Cocoa adds child windows of its own to our
windows. These windows are, of course, not instances of WineWindow. So, when
we call WineWindow-specific methods on them, it throws exceptions.
On Yosemite, double-clicking a window's title bar zooms it. (This is to
compensate for the fact that the zoom button has been replaced by a full-screen
button.) Sometimes, double-clicking in the content area would count as double-
clicking in the title bar.
This is controlled, in part, by the -mouseDownCanMoveWindow method of the view
that was hit in the window. The default implementation of that returns YES
for non-opaque views, as the views are in the Mac driver. Overriding it to
return NO prevents the problem.
NSBezierPath doesn't override the -isEqual: method to actually compare paths,
so it just falls back to object identity which, in our case, makes paths seem
like they're never equal.
Also, memcmp()-ing the rectangle array is almost certainly faster than any
general test for equality between two paths.
This avoids flickering and tearing on some versions of OS X during frequent
redrawing in a shaped window, such as when scrolling a document in Word 2007.
Since we aren't guaranteed that the window surface has updated bits for us to
draw, we mark the whole content view as needing redisplay and draw the window's
shape in the background color on the first -drawRect: after the shape change.
This means the resulting rectangle will be short, but we don't have much
choice. Some apps don't cope properly with the one-past-the-end character.
For example, Excel 2007 gets stuck in an infinite loop.
The Mac driver can generate scroll wheel events with values which are not integral
multiples of WHEEL_DELTA. Apps should handle that by scrolling a corresponding
non-integral multiple of what they'd do for a WHEEL_DELTA-valued scroll or, if
they can't, then at least accumulate scroll distance until its magnitude exceeds
WHEEL_DELTA and do a "chunky" scroll. However, many apps don't do that properly.
They may scroll way too far/fast or even in the opposite direction.
If the registry setting UsePreciseScrolling is set to "n", the Mac driver will do
that accumulation and chunking itself to work around such broken app behavior.
Cocoa will bring an unowned window to the front of its level when it's clicked,
but it doesn't do that for owned windows. The old code went out of its way to
make owned windows behave like unowned windows in this respect. That was
exactly backward. We wish we could control whether windows are raised on a
click. We don't have that opportunity for unowned windows, but, by ripping
out a bunch of code, we do for owned windows.
Many games clip the cursor to the client area of the window. However, on OS X,
the resizing controls extend into that client area. So, it's possible that
while playing, the user might unintentionally click in the resizing area and
drag, resizing the window.
It's not necessary. Unlike with X11, on Mac OS X the pixel format doesn't affect
the properties of windows and views. The pixel format is a property of the GL
context, which can attach to any view.
Its superclass, NSOpenGLContext, only holds a weak reference. The view was
sometimes being deallocated before the context was disposed of, resulting in
crashes.
We clear it if the context or the view is NULL. If the context is non-NULL,
we want to disassociate the views of both the current and passed-in contexts,
if they differ.
We only care if we have changed the mode and we're changing it back to its
original. Even if the current mode matches the target mode, we may still
need to release the displays and clear the entry from originalDisplayModes.
originalDisplayModes should be used when active, empty when inactive.
latentDisplayModes is used when inactive, empty when active.
The count of entries in originalDisplayModes is used to test whether the
process has the displays captured so adding entries when inactive would give
incorrect results. This could have led us to mistakenly change the display
mode when we don't have the displays captured.
Among other things, this fixes Syberia 2. That game shows, hides, and then
shows its window. Hiding it caused a WINDOW_LOST_FOCUS event to be queued.
By the time it was processed, the window was the foreground window again.
In response to being told it had lost focus, the game minimized its window.
Hiding the window should have prevented or discarded the WINDOW_LOST_FOCUS
event since the change was driven from Wine and the Win32 foreground/active
window state would already be correct. In addition, when the program
re-showed its window and made it foreground, that should have discarded the
event as being out of date. Now they do.
The Win32 window state might have changed while the event was in the queue,
making it obsolete. Sending WM_SYSCOMMAND/SC_RESTORE might re-show a hidden
window, for example.
Cocoa would implictly unhide it when we order a window, anyway. Doing it
early avoids problems from querying -[NSWindow isVisible] while the app is
hidden. That method returns FALSE even for windows which would be visible
if the app weren't hidden.
The -[NSWindow isVisible] method returns FALSE when the process is hidden,
but that's not what we need to know in some cases.
This fixes full-screen games which minimize their window when they lose
focus. Command-Tabbing away hides the process. Because the window was not
visible, the code didn't actually minimize it. When switching back to the
process, no event was sent to the Wine back-end telling it the window had
been restored, so it never resumed drawing to it.
The user is prevented from moving or resizing a maximized window. The zoom
button is still present and enabled for a maximized window but requests that
it be restored rather than simply resizing it, which is what it does for
normal windows.
If a window is not resizable (lacks WS_THICKFRAME) but has a maximize box
(WS_MAXIMIZEBOX), then the zoom button requests that it be maximized rather
than resizing it.
The window menu items are not updated as the window state changes; they only
update when the menu is shown. So the item state is not a reliable indicator
of whether minimization is allowed.
Fixes a problem in some games which repeatedly (re)establish the same cursor
clipping rect, making it exceedingly difficult to move the camera with the
mouse.
This simulates some of what would happen if user32 were managing the drag. The
click in the caption would cause WM_SYSCOMMAND/SC_MOVE. The processing of that
message is synchronous and doesn't return until the move is complete.
Some games require that "blocking" in the internal event loop to prevent them
from misbehaving during the drag.
This fixes a problem where some apps move their window to the front after
the user switches away to another app. OS X prevents the background app
from actually coming in front of the active app's front window, but the
window gets ordered in second place, possibly obscuring other windows of the
active app.
New clipboard formats had been registered for them, but that was pointless.
No Windows app would ever expect or make use of such clipboard formats or the
associated pasteboard data.
It has a non-object pointer from the caller, so it can't allow the caller
to continue until it's finished with it. Also, it discards events from the
event queue and we don't want the caller to process them first.
Fixes brokenness introduced by 784a9139.
Some programs minimize windows which are outside of the desktop. The Mac
driver had been leaving such windows ordered out, which prevented them from
minimizing and appearing on the Dock. That, in turn, made it difficult for
the user to restore them.
Queries can be run out of order because the main thread is waiting on the
response. The main thread didn't really need a response from QUERY_RESIZE_END.
It was only a query for symmetry with QUERY_RESIZE_START.
The Mac driver was already sending these events when the user resizes the
window by dragging its corner/edges, but there are other occasions when the
window frame changes. For example, when the user zooms the window.
The tracking of whether it is over a window or not is only updated when the
mouse moves. If a window was created or moved under it, then the state can be
stale. That caused us to defer hiding the cursor until the mouse was moved.
This happens at the start of games pretty often.
The main dispatch queue is a serial queue and is a shared resource. If we
submit a long-running task to it, then no other tasks, including those submitted
by the system frameworks, can run until it completes.
The standard keyboard shortcut for switching the keyboard layout is Command-
Space, but the Mac driver never sees the Space key press. So, Wine only sees
a press and release of Alt, which puts focus on the menu bar. This prevents
that focus change.
The code had previously set the cursor back to the standard arrow and unhid
it when it left all app windows. Now it restores the cursor image that the
app set and re-hides it if necessary when it moves back over any app window.
Some events get queued for all GUI-connected threads but are only processed
by the first to dequeue them. Other threads which tend their event queue
discard such already-processed events. However, some threads may be
connected to the GUI but never tend their event queue. To prevent such
threads from accumulating zombie events, the zombies are cleared each time a
new event is queued.
This fixes a problem where windows could spontaneously re-minimize after
being unminimized. Cocoa would see the window unminimize. It would queue
a WINDOW_DID_UNMINIMIZE event. While that event was pending, Wine might do
something which caused set_cocoa_window_properties() to be called and tell
Cocoa to conform itself to the current Win32 state. The current Win32 state
still had the window minimized, so Cocoa would re-minimize the window. It
would even discard the WINDOW_DID_UNMINIMIZE event.
Cocoa would automatically do this for a normal app. However, the Mac driver
makes all of its windows inherit from NSPanel and Cocoa ignores panels for
this feature.
They show up in the taskbar on Windows 7. Selecting them from there is
meaningful and useful, as is selecting them from the Window menu.
In addition to just switching among windows from that menu, this is also
important to recovering a minimized window if the user has configured their
system preferences to minimize windows into the process's dock icon (rather
than as separate dock icons).
The Mac driver captures the displays when the program changes the display
mode. If the user types Command-Tab to switch away, it resets the displays
to their original modes and releases them. However, if they switched back,
it didn't restore the mode to what the program had set, so the program often
showed the game window in a corner of the screen with the top behind the Mac
menu bar.
Cocoa won't order a minimized window out of the screen list using -orderOut:.
This leaves a window that should be hidden still visible in the Dock, where
it can be unminimized.
That event can confuse things if the program switches focus from A to B and
then back to A and then processes events. It will get an event saying that
A lost focus in Cocoa, check that A does indeed have current focus in Wine,
and so switch focus away from it (to the desktop window). (It then gets an
event that B lost focus, but that does nothing at that point.)
This matches what Cocoa does when determining how to handle an event so that,
for example, our test if a click is in the window grow box corresponds to
whether Cocoa will run an internal mouse-tracking loop to resize the window
when we pass it the event. This fixes a problem where both Cocoa and user32
would try to run a resize loop and the cursor would get "stuck" resizing the
window after the button was released.
It's fairly common in Mac keyboard layouts that, if you type a dead key twice,
the second key press will both produce a non-dead character and also
perpetuate the dead-key state. For example, with the U.S. layout, Option-E,
E will produce "" and Option-E, Option-E, E will produce "". Windows
keyboard layouts don't tend to do this. The second key press produces the
non-dead character and clears the dead-key state.
The Cocoa parent-child relationship has undesirable side effects and bugs. In
the general case, it's the only way to maintain the z-order of owned windows
relative to their owner. But when the owner is non-topmost and an owned
window is topmost, the Cocoa window level will enforce that and we don't
need it.
It may be necessary to reorder to some extent because the clicked window is
behind a sibling at the same level, but that shouldn't move it later in the
list than higher-level siblings.
Cocoa gets buggy if the list of child windows isn't in z-order.
The right place may not be the end of the list of Cocoa child windows if some
of the siblings are at a higher window level (i.e. floating if the clicked
window is not).
For keys pressed in combination with Command, -[NSApplication sendEvent:]
simply doesn't pass the key-up event through to the window. We have to
track which keys we've told Wine are pressed because Cocoa may consume
key-downs that trigger menus or system behaviors.
Piotr Caban