Theme for macOS, PanelTheme #153 #161

Author: tonsky

README.md

@@ -90,7 +90,13 @@ Alpha. Expect API breakages.
 | runOnUIThread     | ✅   | ✅   | [#113](https://github.com/HumbleUI/JWM/issues/113) |
 | terminate         | ✅   | ✅   | ✅   |
 | Show notification | ❌   | ❌   | ❌   |
-| System Theme      | ❌   | ❌   | ❌   |
+
+### Theme
+|                   | Windows | macOS | X11 |
+|-------------------|---------|-------|-----|
+| isHighContrast    | ✅      | ✅    | ➖  |
+| isDark            | [#161](https://github.com/HumbleUI/JWM/issues/161) | ✅ | ➖ |
+| isInvereted       | [#161](https://github.com/HumbleUI/JWM/issues/161) | ✅ | ➖ |
 
 ### Window
 

examples/java/Example.java

@@ -26,6 +26,7 @@ public class Example implements Consumer<Event> {
     public PanelMouseCursors panelMouseCursors;
     public PanelRendering panelRendering;
     public PanelEvents panelEvents;
+    public PanelTheme panelTheme;
 
     public Window window;
 
@@ -44,6 +45,7 @@ public Example() {
         panelMouseCursors = new PanelMouseCursors(window);
         panelRendering = new PanelRendering(window);
         panelEvents = new PanelEvents(window);
+        panelTheme = new PanelTheme(window);
 
         var scale = window.getScreen().getScale();
         int count = App._windows.size() - 1;
@@ -112,7 +114,8 @@ public void paint(String reason) {
         panelRendering.paint    (canvas, PADDING + (panelWidth + PADDING) * 2, PADDING + (panelHeight + PADDING) * 1, panelWidth, panelHeight, scale);
 
         // Third row
-        panelEvents.paint       (canvas, PADDING + (panelWidth + PADDING) * 0, PADDING + (panelHeight + PADDING) * 2, panelWidth * 3 + PADDING * 2, panelHeight, scale);
+        panelEvents.paint       (canvas, PADDING + (panelWidth + PADDING) * 0, PADDING + (panelHeight + PADDING) * 2, panelWidth * 2 + PADDING, panelHeight, scale);
+        panelTheme.paint        (canvas, PADDING + (panelWidth + PADDING) * 2, PADDING + (panelHeight + PADDING) * 2, panelWidth, panelHeight, scale);
 
         // Colored bars
         try (var paint = new Paint()) {

examples/java/PanelTheme.java

@@ -0,0 +1,26 @@
+package io.github.humbleui.jwm.examples;
+
+import io.github.humbleui.jwm.*;
+import org.jetbrains.skija.*;
+
+public class PanelTheme extends Panel {
+
+    public PanelTheme(Window window) {
+        super(window);
+    }
+
+    @Override
+    public void paintImpl(Canvas canvas, int width, int height, float scale) {    
+        try (var paint = new Paint()) {
+            paint.setColor(0xFFFFFFFF);
+            canvas.drawString("isHighContrast", Example.PADDING, Example.PADDING * 2, Example.FONT12, paint);
+            canvas.drawString("" + Theme.isHighContrast(), width / 2 + Example.PADDING / 2, Example.PADDING * 2, Example.FONT12, paint);
+
+            canvas.drawString("isDark", Example.PADDING, Example.PADDING * 4, Example.FONT12, paint);
+            canvas.drawString("" + Theme.isDark(), width / 2 + Example.PADDING / 2, Example.PADDING * 4, Example.FONT12, paint);
+
+            canvas.drawString("isInverted", Example.PADDING, Example.PADDING * 6, Example.FONT12, paint);
+            canvas.drawString("" + Theme.isInverted(), width / 2 + Example.PADDING / 2, Example.PADDING * 6, Example.FONT12, paint);
+        }
+    }
+}

macos/cc/ThemeMac.mm

@@ -0,0 +1,35 @@
+#import <Cocoa/Cocoa.h>
+#include <jni.h>
+
+const CFStringRef WhiteOnBlack = CFSTR("whiteOnBlack");
+const CFStringRef UniversalAccessDomain = CFSTR("com.apple.universalaccess");
+
+extern "C" JNIEXPORT bool JNICALL Java_io_github_humbleui_jwm_Theme__1nIsHighContrast
+  (JNIEnv* env, jclass jclass) {
+    NSWorkspace* workspace = [NSWorkspace sharedWorkspace];
+    if ([workspace respondsToSelector:@selector (accessibilityDisplayShouldIncreaseContrast)]) {
+        return workspace.accessibilityDisplayShouldIncreaseContrast;
+    }
+    return false;
+}
+
+extern "C" JNIEXPORT bool JNICALL Java_io_github_humbleui_jwm_Theme__1nIsDark
+  (JNIEnv* env, jclass jclass) {
+    if (@available(macOS 10.14, *)) {
+        NSAppearanceName appearance = [[NSApp effectiveAppearance] bestMatchFromAppearancesWithNames:@[
+            NSAppearanceNameAqua, NSAppearanceNameDarkAqua
+        ]];
+        return [appearance isEqual:NSAppearanceNameDarkAqua];
+    }
+    return false;
+}
+
+extern "C" JNIEXPORT bool JNICALL Java_io_github_humbleui_jwm_Theme__1nIsInverted
+  (JNIEnv* env, jclass jclass) {
+    CFPreferencesAppSynchronize(UniversalAccessDomain);
+    Boolean keyExistsAndHasValidFormat = false;
+    Boolean is_inverted = CFPreferencesGetAppBooleanValue(WhiteOnBlack, UniversalAccessDomain, &keyExistsAndHasValidFormat);
+    if (!keyExistsAndHasValidFormat)
+        return false;
+    return is_inverted;
+}

shared/cc/Theme.hh

@@ -4,21 +4,33 @@
 import io.github.humbleui.jwm.impl.*;
 
 public class Theme {
-
     /**
-     * <p>>Check whether OS currently uses high contrast mode.</p>
+     * <p>Check whether OS currently uses high contrast mode.</p>
      *
-     * @return          bool;
+     * @return  bool on Windows macOS, false otherwise
      */
     public static boolean isHighContrast() {
-        assert _onUIThread();
+        assert App._onUIThread();
+        if (Platform.CURRENT != Platform.WINDOWS && Platform.CURRENT != Platform.MACOS)
+            return false;
         return _nIsHighContrast();
     }
 
+    public static boolean isDark() {
+        assert App._onUIThread();
+        if (Platform.CURRENT != Platform.MACOS)
+            return false;
+        return _nIsDark();
+    }
 
-    @ApiStatus.Internal public static boolean _onUIThread() {
-        return App._onUIThread();
+    public static boolean isInverted() {
+        assert App._onUIThread();
+        if (Platform.CURRENT != Platform.MACOS)
+            return false;
+        return _nIsInverted();
     }
 
     @ApiStatus.Internal public static native boolean _nIsHighContrast();
+    @ApiStatus.Internal public static native boolean _nIsDark();
+    @ApiStatus.Internal public static native boolean _nIsInverted();
 }

shared/java/Theme.java

@@ -46,7 +46,6 @@ set(JWM_WINDOWS_SOURCES_CXX
     cc/LayerWGL.cc
     cc/LayerWGL.hh
     cc/ThemeWin32.cc
-    cc/ThemeWin32.hh
     cc/PlatformWin32.hh
     cc/ScreenWin32.cc
     cc/ScreenWin32.hh

windows/CMakeLists.txt

@@ -5,7 +5,6 @@
 #include <D3D12/DX12Common.hh>
 #include <ContextWGL.hh>
 #include <ScreenWin32.hh>
-#include <ThemeWin32.hh>
 #include <jni.h>
 
 namespace jwm {
@@ -26,13 +25,11 @@ namespace jwm {
         ContextWGL& getContextWGL() { return _wglContext; }
         DX12Common& getDx12Common() { return _dx12common; }
         JNIEnv* getJniEnv() const { return _jniEnv; }
-        ThemeWin32& getTheme() { return _theme; }
 
     private:
         std::vector<ScreenWin32> _screens;
         WindowManagerWin32 _windowManager;
         ClipboardWin32 _clipboard;
-        ThemeWin32 _theme;
         ContextWGL _wglContext;
         DX12Common _dx12common;
         JNIEnv* _jniEnv;

windows/cc/AppWin32.hh

@@ -1,5 +1,3 @@
-#include "ThemeWin32.hh"
-
 #include <Uxtheme.h>
 #include <impl/Library.hh>
 #include <AppWin32.hh>
@@ -8,29 +6,23 @@
 #include <stdio.h>
 #include <Log.hh>
 #include <PlatformWin32.hh>
-#include "Theme.hh"
 
+using namespace jwm;
+
+// JNI
 
-bool jwm::ThemeWin32::isHighContrast() {
+extern "C" JNIEXPORT bool JNICALL Java_io_github_humbleui_jwm_Theme__1nIsHighContrast
+  (JNIEnv* env, jclass jclass) {
     HIGHCONTRASTA highContrast;
     highContrast.cbSize = sizeof(HIGHCONTRASTA);
     highContrast.dwFlags = 0;
     highContrast.lpszDefaultScheme = nullptr;
     bool isOk = SystemParametersInfoA(SPI_GETHIGHCONTRAST, 0, &highContrast, 0);
     if (!isOk) {
-        JWM_VERBOSE("Failed to get SystemParametersInfoA for high contrast");
+        JWM_LOG("Failed to get SystemParametersInfoA for high contrast");
         return false;
     }
-    JWM_VERBOSE("is HighContrast? '"
-                << ((HCF_HIGHCONTRASTON & highContrast.dwFlags) == 1) << "'");
-    return (HCF_HIGHCONTRASTON & highContrast.dwFlags) == 1;
-}
-
-// JNI
-
-extern "C" JNIEXPORT bool JNICALL Java_io_github_humbleui_jwm_Theme__1nIsHighContrast
-        (JNIEnv* env, jclass jclass) {
-    jwm::AppWin32& app = jwm::AppWin32::getInstance();
-    jwm::ThemeWin32& theme = app.getTheme();
-    return theme.isHighContrast();
+    bool result = (HCF_HIGHCONTRASTON & highContrast.dwFlags) == 1;
+    JWM_VERBOSE("is HighContrast? '" << result << "'");
+    return result;
 }