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comparison dep/animia/src/win/x11.cc @ 156:cdf79282d647

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dep/animia: add VERY early x11 window stuff
author Paper <mrpapersonic@gmail.com>
date Wed, 15 Nov 2023 18:04:04 -0500
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children 18c8eb5d1edc
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155:d2bbb5773616 156:cdf79282d647
1 #include <X11/Xlib.h>
2
3 /* The code for this is very fugly because X11 uses lots of generic type names
4 (i.e., Window, Display), so I have to use :: when defining vars to distinguish
5 between Animia's types and X11's types */
6
7 namespace animia::internal::x11 {
8
9 static bool GetWindowPropertyAsString(::Display* display, ::Window window, const char* atom, std::string& result, ::Atom reqtype = AnyPropertyType) {
10 int format;
11 unsigned long leftover_bytes, num_of_items;
12 ::Atom type;
13 void* data;
14
15 if (!::XGetWindowProperty(display, root, ::XInternAtom(display, atom, true), 0L, (~0L), false, reqtype,
16 &type, &format, &num_of_items, &leftover_bytes, &data))
17 return false;
18
19 result = std::string(data, num_of_items);
20
21 ::XFree(data);
22
23 return true;
24 }
25
26 static bool GetWindowPID(::Display* display, ::Window window, pid_t& result) {
27 int format;
28 unsigned long leftover_bytes, num_of_items;
29 ::Atom type;
30 void* data;
31
32 if (!::XGetWindowProperty(display, root, ::XInternAtom(display, atom, true), 0L, (~0L), false, reqtype,
33 &type, &format, &num_of_items, &leftover_bytes, &data))
34 return false;
35
36 result = static_cast<pid_t>(*(uint32_t*)data);
37
38 ::XFree(data);
39
40 return true;
41 }
42
43 static bool FetchName(::Display* display, ::Window window, std::string& result) {
44 /* TODO: Check if XInternAtom created None or not... */
45 if (GetWindowPropertyAsString(display, window, "_NET_WM_NAME", result, ::XInternAtom(display, "UTF8_STRING", false)))
46 return true;
47
48 /* Fallback to XGetWMName() */
49 XTextProperty text;
50
51 {
52 int status = ::XGetWMName(display, window, &text);
53 if (!status || !text_prop.value || !text_prop.nitems)
54 return false;
55 }
56
57 char** list;
58
59 {
60 int num;
61
62 int status = ::XmbTextPropertyToTextList(display, &text, &list, &num);
63 if (status < Success || !num || !*list)
64 return false;
65 }
66
67 ::XFree(text.value);
68
69 result = *list;
70
71 ::XFreeStringList(list);
72
73 return true;
74 }
75
76 bool X11WinTools::EnumerateWindows(window_proc_t window_proc) {
77 auto get_window_property = [&](Display* display, Window window, Atom atom, unsigned long& num_of_items, void*& data) -> int {
78 int format;
79 unsigned long leftover_bytes;
80 ::Atom realtype;
81
82 return ::XGetWindowProperty(display, root, atom, 0L, (~0L), false, AnyPropertyType,
83 &realtype, &format, &num_of_items, &leftover_bytes, &data);
84 }
85
86 ::Display* display = ::XOpenDisplay(nullptr);
87 ::Window root = ::DefaultRootWindow(display);
88
89 unsigned long num_windows;
90 ::Window* windows = nullptr;
91
92 int status = get_window_property(display, root, ::XInternAtom(display, "_NET_CLIENT_LIST", true), num_windows, (void*)windows);
93
94 if (status < Success)
95 return false;
96
97 for (long k = 0; k < num_windows; k++) {
98 const ::Window window = windows[k];
99
100 Window win;
101 win.id = (long)windows[k];
102 GetWindowPropertyAsString(display, window, "_NET_ACTIVE_WINDOW", win.class_name, ::XInternAtom(display, "STRING", false));
103 win.title = FetchName(display, windows[k]);
104
105 Process proc;
106 GetWindowPID(display, window, proc.pid);
107
108 if (!window_proc(proc, win))
109 return false;
110 }
111
112 return true;
113 }
114
115 }