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Add CoreGraphics bindings and macOS getAllWindows() implementation #1719

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1 change: 1 addition & 0 deletions CHANGES.md
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,7 @@ Features
* [#1696](https://github.com/java-native-access/jna/pull/1696): Add `LARGE_INTEGER.ByValue` to `LARGE_INTEGER` in `WinNT.java` - [@baier233](https://github.com/baier233).
* [#1697](https://github.com/java-native-access/jna/pull/1697): Add WlanApi module - [@eranl](https://github.com/eranl).
* [#1718](https://github.com/java-native-access/jna/pull/1718): Add `Cups` to `c.s.j.p.unix` providing CUPS printing system bindings for destinations, jobs, options, and server configuration - [@dbwiddis](https://github.com/dbwiddis).
* [#1719](https://github.com/java-native-access/jna/pull/1719): Add `CoreGraphics` to `c.s.j.p.mac` with Quartz Window Services and Display Services bindings; implement `getAllWindows()` in `MacWindowUtils` - [@dbwiddis](https://github.com/dbwiddis).

Bug Fixes
---------
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90 changes: 90 additions & 0 deletions contrib/platform/src/com/sun/jna/platform/WindowUtils.java
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Original file line number Diff line number Diff line change
Expand Up @@ -97,6 +97,11 @@
import com.sun.jna.platform.win32.WinDef.HICON;
import com.sun.jna.platform.win32.WinDef.HRGN;
import com.sun.jna.platform.win32.WinDef.HWND;
import com.sun.jna.platform.mac.CoreFoundation;
import com.sun.jna.platform.mac.CoreFoundation.CFArrayRef;
import com.sun.jna.platform.mac.CoreFoundation.CFDictionaryRef;
import com.sun.jna.platform.mac.CoreFoundation.CFStringRef;
import com.sun.jna.platform.mac.CoreGraphics;
import com.sun.jna.platform.win32.WinDef.LPARAM;
import com.sun.jna.platform.win32.WinDef.LRESULT;
import com.sun.jna.platform.win32.WinDef.POINT;
Expand Down Expand Up @@ -1560,6 +1565,91 @@ private void setBackgroundTransparent(Window w, boolean transparent, String cont
}
fixWindowDragging(w, context);
}

@Override
protected List<DesktopWindow> getAllWindows(final boolean onlyVisibleWindows) {
final List<DesktopWindow> result = new LinkedList<>();
int options = onlyVisibleWindows
? CoreGraphics.kCGWindowListOptionOnScreenOnly | CoreGraphics.kCGWindowListExcludeDesktopElements
: CoreGraphics.kCGWindowListOptionAll;
CFArrayRef windowList = CoreGraphics.INSTANCE.CGWindowListCopyWindowInfo(
options, CoreGraphics.kCGNullWindowID);
if (windowList == null) {
return result;
}
try {
CFStringRef kName = CFStringRef.createCFString(CoreGraphics.kCGWindowName);
CFStringRef kOwnerName = CFStringRef.createCFString(CoreGraphics.kCGWindowOwnerName);
CFStringRef kBounds = CFStringRef.createCFString(CoreGraphics.kCGWindowBounds);
CFStringRef kNumber = CFStringRef.createCFString(CoreGraphics.kCGWindowNumber);
CFStringRef kLayer = CFStringRef.createCFString(CoreGraphics.kCGWindowLayer);
try {
int count = windowList.getCount();
for (int i = 0; i < count; i++) {
Pointer p = windowList.getValueAtIndex(i);
if (p == null) {
continue;
}
CFDictionaryRef dict = new CFDictionaryRef(p);

// Skip non-normal windows (layer != 0)
Pointer layerPtr = CoreFoundation.INSTANCE.CFDictionaryGetValue(dict, kLayer);
if (layerPtr != null) {
CoreFoundation.CFNumberRef layerNum = new CoreFoundation.CFNumberRef(layerPtr);
if (layerNum.intValue() != 0) {
continue;
}
}

// Window title (may be null)
String title = "";
Pointer namePtr = CoreFoundation.INSTANCE.CFDictionaryGetValue(dict, kName);
if (namePtr != null) {
title = new CFStringRef(namePtr).stringValue();
}

// Owner name as filePath equivalent
String ownerName = "";
Pointer ownerPtr = CoreFoundation.INSTANCE.CFDictionaryGetValue(dict, kOwnerName);
if (ownerPtr != null) {
ownerName = new CFStringRef(ownerPtr).stringValue();
}

// Window ID as HWND
HWND hwnd = null;
Pointer numPtr = CoreFoundation.INSTANCE.CFDictionaryGetValue(dict, kNumber);
if (numPtr != null) {
int windowId = new CoreFoundation.CFNumberRef(numPtr).intValue();
hwnd = new HWND(Pointer.createConstant(windowId));
}

// Bounds
Rectangle locAndSize = new Rectangle();
Pointer boundsPtr = CoreFoundation.INSTANCE.CFDictionaryGetValue(dict, kBounds);
if (boundsPtr != null) {
CoreGraphics.CGRect rect = new CoreGraphics.CGRect();
if (CoreGraphics.INSTANCE.CGRectMakeWithDictionaryRepresentation(
new CFDictionaryRef(boundsPtr), rect)) {
locAndSize = new Rectangle(
(int) rect.origin.x, (int) rect.origin.y,
(int) rect.size.width, (int) rect.size.height);
}
}

result.add(new DesktopWindow(hwnd, title, ownerName, locAndSize));
}
} finally {
kName.release();
kOwnerName.release();
kBounds.release();
kNumber.release();
kLayer.release();
}
} finally {
windowList.release();
}
return result;
}
}
private static class X11WindowUtils extends NativeWindowUtils {
private static Pixmap createBitmap(final Display dpy,
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