(#17) window_manager MacOS implementation to retrieve list of window handles and window dimensions by handle

Author: Simon Hofmann

Diff for: src/macos/window_manager.mm

@@ -0,0 +1,57 @@
+#import <Foundation/Foundation.h>
+#import <AppKit/AppKit.h>
+#import <ApplicationServices/ApplicationServices.h>
+#include "../window_manager.h"
+
+std::vector<int32_t> getWindows() {
+  CGWindowListOption listOptions = kCGWindowListOptionOnScreenOnly | kCGWindowListExcludeDesktopElements;
+  CFArrayRef windowList = CGWindowListCopyWindowInfo(listOptions, kCGNullWindowID);
+
+  std::vector<int32_t> windowHandles;
+
+  for (NSDictionary *info in (NSArray *)windowList) {
+    NSNumber *ownerPid = info[(id)kCGWindowOwnerPID];
+    NSNumber *windowNumber = info[(id)kCGWindowNumber];
+
+    auto app = [NSRunningApplication runningApplicationWithProcessIdentifier: [ownerPid intValue]];
+    auto path = app ? [app.bundleURL.path UTF8String] : "";
+
+    if (app && path != "") {
+      windowHandles.push_back([windowNumber intValue]);
+    }
+  }
+
+  if (windowList) {
+    CFRelease(windowList);
+  }
+
+  return windowHandles;
+}
+
+MMRect getWindowRect(const int32_t windowHandle) {
+  CGWindowListOption listOptions = kCGWindowListOptionOnScreenOnly | kCGWindowListExcludeDesktopElements;
+  CFArrayRef windowList = CGWindowListCopyWindowInfo(listOptions, kCGNullWindowID);
+
+  std::vector<std::string> windowNames;
+
+  for (NSDictionary *info in (NSArray *)windowList) {
+    NSNumber *ownerPid = info[(id)kCGWindowOwnerPID];
+    NSNumber *windowNumber = info[(id)kCGWindowNumber];
+
+    auto app = [NSRunningApplication runningApplicationWithProcessIdentifier: [ownerPid intValue]];
+
+    if (app && [windowNumber intValue] == windowHandle) {
+      CGRect windowRect;
+      if (CGRectMakeWithDictionaryRepresentation((CFDictionaryRef)info[(id)kCGWindowBounds], &windowRect)) {
+        return MMRectMake(windowRect.origin.x, windowRect.origin.y, windowRect.size.height, windowRect.size.width);
+      }
+        return MMRectMake(0, 0, 0, 0);
+    }
+  }
+
+  if (windowList) {
+    CFRelease(windowList);
+  }
+
+  return MMRectMake(0, 0, 0, 0);
+}