122 lines
3.9 KiB
Go
122 lines
3.9 KiB
Go
//go:build darwin
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package main
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/*
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#cgo CFLAGS: -x objective-c -fobjc-arc -fblocks
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#cgo LDFLAGS: -framework AppKit -framework CoreGraphics
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#include <dispatch/dispatch.h>
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#import <AppKit/AppKit.h>
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static NSWindow* snipMainWindow(void) {
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NSWindow *window = [NSApp mainWindow];
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if (window == nil && [[NSApp windows] count] > 0) {
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window = [[NSApp windows] objectAtIndex:0];
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}
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return window;
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}
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// snipMakeViewTransparent recursively clears AppKit/WKWebView backing
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// surfaces. Setting only NSWindow transparent is insufficient for Wails:
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// WKWebView may still paint an opaque default grey background.
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static void snipMakeViewTransparent(NSView *view) {
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if (view == nil) {
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return;
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}
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Class wkWebViewClass = NSClassFromString(@"WKWebView");
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if (wkWebViewClass != nil && [view isKindOfClass:wkWebViewClass]) {
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@try {
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[view setValue:@NO forKey:@"drawsBackground"];
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} @catch (__unused NSException *exception) {
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}
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@try {
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id scrollView = [view valueForKey:@"scrollView"];
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if ([scrollView isKindOfClass:[NSScrollView class]]) {
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[(NSScrollView *)scrollView setDrawsBackground:NO];
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[(NSScrollView *)scrollView setBackgroundColor:[NSColor clearColor]];
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}
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} @catch (__unused NSException *exception) {
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}
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}
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if ([view isKindOfClass:[NSScrollView class]]) {
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NSScrollView *scrollView = (NSScrollView *)view;
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[scrollView setDrawsBackground:NO];
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[scrollView setBackgroundColor:[NSColor clearColor]];
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}
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[view setWantsLayer:YES];
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if ([view layer] != nil) {
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[[view layer] setOpaque:NO];
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[[view layer] setBackgroundColor:[[NSColor clearColor] CGColor]];
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}
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@try {
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[view setValue:@NO forKey:@"opaque"];
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} @catch (__unused NSException *exception) {
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}
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@try {
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[view setValue:@NO forKey:@"drawsBackground"];
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} @catch (__unused NSException *exception) {
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}
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for (NSView *subview in [view subviews]) {
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snipMakeViewTransparent(subview);
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}
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}
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static void snipConfigureOverlayWindow(void) {
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dispatch_async(dispatch_get_main_queue(), ^{
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NSWindow *window = snipMainWindow();
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NSScreen *screen = [NSScreen mainScreen];
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if (window == nil || screen == nil) {
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return;
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}
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[window setOpaque:NO];
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[window setBackgroundColor:[NSColor clearColor]];
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snipMakeViewTransparent([window contentView]);
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[window setLevel:NSScreenSaverWindowLevel];
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[window setCollectionBehavior:
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NSWindowCollectionBehaviorCanJoinAllSpaces |
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NSWindowCollectionBehaviorFullScreenAuxiliary |
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NSWindowCollectionBehaviorStationary];
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[window setFrame:[screen frame] display:YES];
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});
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}
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static void snipRestoreOverlayWindow(void) {
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dispatch_async(dispatch_get_main_queue(), ^{
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NSWindow *window = snipMainWindow();
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if (window == nil) {
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return;
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}
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[window setLevel:NSNormalWindowLevel];
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[window setCollectionBehavior:NSWindowCollectionBehaviorDefault];
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[window setOpaque:YES];
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[window setBackgroundColor:
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[NSColor colorWithCalibratedRed:246.0/255.0
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green:247.0/255.0
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blue:250.0/255.0
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alpha:1.0]];
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});
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}
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*/
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import "C"
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// configureOverlayWindow promotes the Wails NSWindow to a transparent,
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// screen-level overlay. Wails can size a frameless window, but AppKit-only
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// flags are needed to cover the menu bar and keep the WebView transparent.
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func configureOverlayWindow() {
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C.snipConfigureOverlayWindow()
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}
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// restoreOverlayWindow returns the NSWindow to normal app-window behaviour
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// before the settings UI is shown again.
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func restoreOverlayWindow() {
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C.snipRestoreOverlayWindow()
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}
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