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annotate src/sys/win32/dark_theme.cc @ 327:b5d6c27c308f

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anime: refactor Anime::SeriesSeason to Season class ToLocalString has also been altered to take in both season and year because lots of locales actually treat formatting seasons differently! most notably is Russian which adds a suffix at the end to notate seasons(??)
author Paper <paper@paper.us.eu.org>
date Thu, 13 Jun 2024 01:49:18 -0400
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1 #include "sys/win32/dark_theme.h"
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2
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3 #include <QApplication>
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4 #include <QOperatingSystemVersion>
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5 #include <QSettings>
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6 #include <QWidget>
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8 #include <iostream>
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9 #include <memory>
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11 #include <dwmapi.h>
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12
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13 struct LibraryDeconstructor {
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14 using pointer = HINSTANCE;
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15 void operator()(pointer t) const { ::FreeLibrary(t); };
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16 };
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17
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18 using Library = std::unique_ptr<HINSTANCE, LibraryDeconstructor>;
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19
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20 class Dwmapi {
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21 public:
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22 Dwmapi() {
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23 /* load functions */
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24 library.reset(::LoadLibraryW(L"dwmapi.dll"));
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25 set_wind_attrib = reinterpret_cast<decltype(::DwmSetWindowAttribute)*>(
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26 GetProcAddress(library.get(), "DwmSetWindowAttribute"));
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27 }
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29 HRESULT SetWindowAttribute(HWND hWnd, DWORD key, LPCVOID data, DWORD sz_data) {
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30 if (!library.get())
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31 return E_POINTER;
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32
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33 /* GCC throws a fit here because C++ lacks a "generic" function pointer type.
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34 * Ignore. */
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35 if (!set_wind_attrib)
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36 return E_POINTER;
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37
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38 return set_wind_attrib(hWnd, key, data, sz_data);
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39 }
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41 protected:
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42 Library library = nullptr;
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43 decltype(::DwmSetWindowAttribute)* set_wind_attrib;
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44 };
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46 Dwmapi dwmapi;
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48 namespace win32 {
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49
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50 bool SetTitleBarToBlack(QWidget* win, bool enabled) {
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51 /* 19 and 20 are *both* DWMWA_USE_IMMERSIVE_DARK_MODE.
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52 *
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53 * It's 20 on newer versions of windows (i.e. win11 and late win10),
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54 * but it's 19 on very old versions of win10 nobody ought to be using anymore.
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55 */
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56 static constexpr DWORD DWMWA_USE_IMMERSIVE_DARK_MODE_OLD = 19;
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57 static constexpr DWORD DWMWA_USE_IMMERSIVE_DARK_MODE = 20;
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58
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59 BOOL b = enabled;
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61 {
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62 HRESULT result = dwmapi.SetWindowAttribute(reinterpret_cast<HWND>(win->winId()), DWMWA_USE_IMMERSIVE_DARK_MODE,
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63 &b, sizeof(b));
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64 if (result == S_OK)
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65 return b;
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66 }
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68 {
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69 HRESULT result = dwmapi.SetWindowAttribute(reinterpret_cast<HWND>(win->winId()),
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70 DWMWA_USE_IMMERSIVE_DARK_MODE_OLD, &b, sizeof(b));
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71 if (result == S_OK)
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72 return b;
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73 }
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75 return b;
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76 }
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78 void SetTitleBarsToBlack(bool enabled) {
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79 for (QWidget* widget : qApp->topLevelWidgets()) {
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80 SetTitleBarToBlack(widget, enabled);
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81 }
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82 }
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83
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84 bool DarkThemeAvailable() {
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85 const auto& ver = QOperatingSystemVersion::current();
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86 return (ver.majorVersion() > 10) ? true : (ver.majorVersion() == 10 && ver.microVersion() >= 17763);
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87 }
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88
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89 bool IsInDarkTheme() {
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90 QSettings settings("HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Themes\\Personalize",
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91 QSettings::NativeFormat);
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92 return settings.value("AppsUseLightTheme", 1).toInt() == 0;
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93 }
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95 } // namespace win32