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annotate dep/animone/src/win/win32.cc @ 362:433eeaca3baf

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CI/linux: revert change to linuxdeployqt; add qt plugin turns out I'm stupid and linuxdeployqt is insanely broken
author Paper <paper@paper.us.eu.org>
date Mon, 15 Jul 2024 01:28:57 -0400
parents adb79bdde329
children
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1 /*
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2 * win/win32.cc: support for Windows
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3 *
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4 * Surprisingly, this is the one time where Microsoft actually
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5 * does it fairly OK. Everything has a pretty simple API, despite
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6 * the stupid wide string stuff.
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7 */
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8 #include "animone/win/win32.h"
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9 #include "animone.h"
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10 #include "animone/util/win32.h"
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11 #include "animone/win.h"
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12 #include "animone/fd.h"
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13
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14 #include <set>
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15 #include <string>
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16
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17 #include <windows.h>
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18
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19 namespace animone::internal::win32 {
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20
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21 static std::wstring GetWindowClassName(HWND hwnd) {
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22 static constexpr int kMaxSize = 256;
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23
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24 std::wstring buffer(kMaxSize, L'\0');
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25 const auto size = ::GetClassNameW(hwnd, &buffer.front(), buffer.length());
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26 buffer.resize(size);
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27 return buffer;
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28 }
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29
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30 static std::wstring GetWindowText(HWND hwnd) {
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31 const auto estimated_size = ::GetWindowTextLengthW(hwnd);
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32 std::wstring buffer(estimated_size + 1, L'\0');
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33
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34 const auto size = ::GetWindowTextW(hwnd, &buffer.front(), buffer.length());
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35 /* GetWindowTextLength docs:
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36 * "Under certain conditions, the GetWindowTextLength function may return a value
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37 * that is larger than the actual length of the text." */
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38 buffer.resize(size);
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39 return buffer;
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40 }
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41
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42 static DWORD GetWindowProcessId(HWND hwnd) {
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43 DWORD process_id = 0;
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44 ::GetWindowThreadProcessId(hwnd, &process_id);
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45 return process_id;
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46 }
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47
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48 ////////////////////////////////////////////////////////////////////////////////
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49
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50 static bool VerifyWindowStyle(HWND hwnd) {
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51 const auto window_style = ::GetWindowLong(hwnd, GWL_STYLE);
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52 const auto window_ex_style = ::GetWindowLong(hwnd, GWL_EXSTYLE);
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53
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54 auto has_style = [&window_style](DWORD style) { return (window_style & style) != 0; };
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55 auto has_ex_style = [&window_ex_style](DWORD ex_style) { return (window_ex_style & ex_style) != 0; };
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56
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57 // Toolbars, tooltips and similar topmost windows
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58 if (has_style(WS_POPUP) && has_ex_style(WS_EX_TOOLWINDOW))
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59 return false;
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60 if (has_ex_style(WS_EX_TOPMOST) && has_ex_style(WS_EX_TOOLWINDOW))
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61 return false;
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62
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63 return true;
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64 }
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65
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66 static bool VerifyClassName(const std::string& name) {
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67 static const std::set<std::string> invalid_names = {
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68 // System classes
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69 "#32770", // Dialog box
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70 "CabinetWClass", // Windows Explorer
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71 "ComboLBox",
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72 "DDEMLEvent",
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73 "DDEMLMom",
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74 "DirectUIHWND",
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75 "GDI+ Hook Window Class",
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76 "IME",
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77 "Internet Explorer_Hidden",
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78 "MSCTFIME UI",
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79 "tooltips_class32",
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80 };
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81
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82 return !name.empty() && !invalid_names.count(name);
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83 }
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84
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85 ////////////////////////////////////////////////////////////////////////////////
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86
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87 static BOOL CALLBACK EnumWindowsProc(HWND hwnd, LPARAM param) {
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88 if (!::IsWindowVisible(hwnd))
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89 return TRUE;
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90
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91 if (!VerifyWindowStyle(hwnd))
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92 return TRUE;
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93
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94 Window window;
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95 window.platform = WindowPlatform::Win32;
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96 window.id.win32 = reinterpret_cast<std::uintptr_t>(hwnd);
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97 window.text = ToUtf8String(GetWindowText(hwnd));
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98 window.class_name = ToUtf8String(GetWindowClassName(hwnd));
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99 if (!VerifyClassName(window.class_name))
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100 return TRUE;
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101
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102 Process process;
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103 process.platform = ExecutablePlatform::Win32;
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104 process.pid = GetWindowProcessId(hwnd);
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105 GetProcessName(process.pid, process.comm);
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106
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107 auto& window_proc = *reinterpret_cast<window_proc_t*>(param);
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108 if (!window_proc(process, window))
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109 return FALSE;
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110
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111 return TRUE;
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112 }
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113
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114 bool EnumerateWindows(window_proc_t window_proc) {
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115 if (!window_proc)
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116 return false;
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117
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118 const auto param = reinterpret_cast<LPARAM>(&window_proc);
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119
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120 // Note that EnumWindows enumerates only top-level windows of desktop apps
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121 // (as opposed to UWP apps) on Windows 8 and above.
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122 return ::EnumWindows(EnumWindowsProc, param) != FALSE;
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123 }
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124
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125 } // namespace animone::internal::win32