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annotate src/sys/osx/dark_theme.cc @ 273:f31305b9f60a

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*: various code safety changes this also makes the code build on Qt 5.7. I can't test it though because I don't have it working... FAIL!
author Paper <paper@paper.us.eu.org>
date Thu, 18 Apr 2024 16:53:17 -0400
parents 862d0d8619f6
children 22f9aacf6ac1
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1 #include "sys/osx/dark_theme.h"
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2
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3 #include <objc/message.h>
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4 #include <objc/runtime.h>
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5
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6 #include <CoreFoundation/CoreFoundation.h>
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7
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8 namespace osx {
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9
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10 typedef id (*object_message_send)(id, SEL, ...);
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11 typedef id (*class_message_send)(Class, SEL, ...);
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12
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13 static const object_message_send obj_send = reinterpret_cast<object_message_send>(objc_msgSend);
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14 static const class_message_send cls_send = reinterpret_cast<class_message_send>(objc_msgSend);
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15
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16 static CFStringRef NSAppearanceNameAqua = nullptr;
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17 static CFStringRef NSAppearanceNameDarkAqua = nullptr;
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18
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19 static const CFStringRef kAppKitBundleID = CFSTR("com.apple.AppKit");
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20
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21 bool RetrieveAppearanceNames() {
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22 CFBundleRef appkit_bundle = CFBundleGetBundleWithIdentifier(kAppKitBundleID);
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23 if (!appkit_bundle)
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24 return false;
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25
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26 NSAppearanceNameAqua =
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27 *reinterpret_cast<CFStringRef*>(CFBundleGetDataPointerForName(appkit_bundle, CFSTR("NSAppearanceNameAqua")));
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28 if (!NSAppearanceNameAqua)
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29 return false;
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30
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31 NSAppearanceNameDarkAqua = *reinterpret_cast<CFStringRef*>(
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32 CFBundleGetDataPointerForName(appkit_bundle, CFSTR("NSAppearanceNameDarkAqua")));
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33 if (!NSAppearanceNameDarkAqua)
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34 return false;
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35
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36 return true;
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37 }
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38
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39 bool DarkThemeAvailable() {
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40 return (__builtin_available(macOS 10.14, *));
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41 }
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42
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43 bool IsInDarkTheme() {
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44 if (!DarkThemeAvailable())
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45 return false;
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46
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47 if (!NSAppearanceNameAqua || !NSAppearanceNameDarkAqua)
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48 if (!RetrieveAppearanceNames())
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49 return false;
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50
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51 // NSArray* array = @[NSAppearanceNameAqua, NSAppearanceNameDarkAqua];
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52 CFArrayRef array = []() -> CFArrayRef {
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53 CFStringRef refs[] = {NSAppearanceNameAqua, NSAppearanceNameDarkAqua};
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54 return CFArrayCreate(NULL, reinterpret_cast<const void**>(refs), 2, &kCFTypeArrayCallBacks);
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55 }();
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56
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57 // NSApplication* app = [NSApplication sharedApplication];
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58 const id app = cls_send(objc_getClass("NSApplication"), sel_getUid("sharedApplication"));
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59
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60 // NSAppearance* effectiveAppearance = [app effectiveAppearance];
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61 const id effectiveAppearance = obj_send(app, sel_getUid("effectiveAppearance"));
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62 if (!effectiveAppearance) {
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63 CFRelease(array);
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64 return false;
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65 }
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66
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67 // NSAppearance* appearance = [effectiveAppearance bestMatchFromAppearancesWithNames: array];
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68 const id appearance = obj_send(effectiveAppearance, sel_getUid("bestMatchFromAppearancesWithNames:"), array);
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69
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70 CFRelease(array);
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71
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72 if (!appearance)
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73 return false;
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74
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75 return CFEqual(appearance, NSAppearanceNameDarkAqua);
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76 }
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77
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78 bool SetToDarkTheme() {
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79 // https://stackoverflow.com/questions/55925862/how-can-i-set-my-os-x-application-theme-in-code
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80 if (!DarkThemeAvailable())
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81 return false;
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82
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83 if (!NSAppearanceNameAqua || !NSAppearanceNameDarkAqua)
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84 if (!RetrieveAppearanceNames())
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85 return false;
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86
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87 // NSApplication* app = [NSApplication sharedApplication];
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88 const id app = cls_send(objc_getClass("NSApplication"), sel_getUid("sharedApplication"));
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89
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90 // NSAppearance* appearance = [NSAppearance appearanceNamed: NSAppearanceNameDarkAqua];
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91 const id appearance =
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92 cls_send(objc_getClass("NSAppearance"), sel_getUid("appearanceNamed:"), NSAppearanceNameDarkAqua);
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93 if (!appearance)
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94 return false;
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95
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96 // [app setAppearance: appearance];
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97 obj_send(app, sel_getUid("setAppearance:"), appearance);
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98 return true;
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99 }
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100
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101 bool SetToLightTheme() {
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102 // https://stackoverflow.com/questions/55925862/how-can-i-set-my-os-x-application-theme-in-code
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103 if (!DarkThemeAvailable())
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104 return false;
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105
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106 if (!NSAppearanceNameAqua || !NSAppearanceNameDarkAqua)
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107 if (!RetrieveAppearanceNames())
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108 return false;
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109
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110 // NSApplication* app = [NSApplication sharedApplication];
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111 const id app = cls_send(objc_getClass("NSApplication"), sel_getUid("sharedApplication"));
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112
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113 // NSAppearance* appearance = [NSAppearance appearanceNamed: NSAppearanceNameDarkAqua];
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114 const id appearance = cls_send(objc_getClass("NSAppearance"), sel_getUid("appearanceNamed:"), NSAppearanceNameAqua);
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115 if (!appearance)
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116 return false;
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117
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118 // [app setAppearance: appearance];
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119 obj_send(app, sel_getUid("setAppearance:"), appearance);
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120 return true;
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121 }
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122
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123 void SetToAutoTheme() {
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124 if (!DarkThemeAvailable())
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125 return;
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126
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127 // NSApplication* app = [NSApplication sharedApplication];
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128 const id app = cls_send(objc_getClass("NSApplication"), sel_getUid("sharedApplication"));
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129
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130 // [app setAppearance: null];
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131 obj_send(app, sel_getUid("setAppearance:"), nullptr);
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132 }
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133
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134 } // namespace osx