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annotate dep/animone/src/win/x11.cc @ 306:f4538a4c91ba

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cleanup: remove extraneous executable flags
author Paper <paper@paper.us.eu.org>
date Sun, 19 May 2024 17:48:52 -0400
parents b1f625b0227c
children a4257370de16
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1 #include "animone/win/x11.h"
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2 #include "animone.h"
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3 #include "animone/fd.h" /* GetProcessName() */
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4 #include "animone/win.h"
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5
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6 #include <xcb/res.h>
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7 #include <xcb/xcb.h>
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8
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9 #include <climits>
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10 #include <cstdint>
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11 #include <cstring>
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12 #include <set>
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13 #include <string>
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14 #include <memory>
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15
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16 #include <chrono>
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17
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18 #include <iostream>
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19
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20 /* This uses XCB (and it uses it *right*), so it should be plenty fast */
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21
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22 static size_t str_nlen(const char* s, size_t len) {
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23 size_t i = 0;
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24 for (; i < len && s[i]; i++)
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25 ;
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26 return i;
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27 }
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28
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29 namespace animone::internal::x11 {
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30
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31 static bool GetAllTopLevelWindowsEWMH(xcb_connection_t* connection, const std::vector<xcb_window_t>& roots,
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32 std::set<xcb_window_t>& result) {
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33 const xcb_atom_t Atom__NET_CLIENT_LIST = [connection] {
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34 static constexpr std::string_view name = "_NET_CLIENT_LIST";
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35 xcb_intern_atom_cookie_t cookie = ::xcb_intern_atom(connection, true, name.size(), name.data());
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36 std::unique_ptr<xcb_intern_atom_reply_t> reply(::xcb_intern_atom_reply(connection, cookie, NULL));
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37
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38 xcb_atom_t atom = reply->atom;
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39
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40 return atom;
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41 }();
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42 if (Atom__NET_CLIENT_LIST == XCB_ATOM_NONE)
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43 return false; // BTFO
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44
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45 bool success = false;
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46
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47 std::vector<xcb_get_property_cookie_t> cookies;
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48 cookies.reserve(roots.size());
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49
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50 for (const auto& root : roots)
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51 cookies.push_back(::xcb_get_property(connection, 0, root, Atom__NET_CLIENT_LIST, XCB_ATOM_ANY, 0L, UINT_MAX));
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52
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53 for (const auto& cookie : cookies) {
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54 std::unique_ptr<xcb_get_property_reply_t> reply(::xcb_get_property_reply(connection, cookie, NULL));
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55
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56 if (reply) {
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57 xcb_window_t* value = reinterpret_cast<xcb_window_t*>(::xcb_get_property_value(reply.get()));
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58 int len = ::xcb_get_property_value_length(reply.get());
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59
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60 for (size_t i = 0; i < len; i++)
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61 result.insert(value[i]);
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62
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63 success |= true;
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64 }
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65 }
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66
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67 return success;
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68 }
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69
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70 /* This is called on every window. What this does is:
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71 * 1. Gets the tree of children
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72 * 2. Searches all children recursively for a WM_STATE property
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73 * 3. If that failed... return the original window
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74 */
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75 static bool WalkWindows(xcb_connection_t* connection, int depth, xcb_atom_t Atom_WM_STATE, const xcb_window_t* windows,
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76 int windows_len, std::set<xcb_window_t>& result) {
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77 /* The depth we should start returning at. */
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78 static constexpr int CUTOFF = 1;
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79
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80 bool success = false;
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81
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82 std::vector<xcb_query_tree_cookie_t> cookies;
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83 cookies.reserve(windows_len);
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84
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85 for (int i = 0; i < windows_len; i++)
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86 cookies.push_back(::xcb_query_tree(connection, windows[i]));
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87
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88 for (const auto& cookie : cookies) {
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89 std::unique_ptr<xcb_query_tree_reply_t> query_tree_reply(::xcb_query_tree_reply(connection, cookie, NULL));
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90
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91 xcb_window_t* tree_children = ::xcb_query_tree_children(query_tree_reply.get());
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92 int tree_children_len = ::xcb_query_tree_children_length(query_tree_reply.get());
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93
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94 std::vector<xcb_get_property_cookie_t> state_property_cookies;
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95 state_property_cookies.reserve(tree_children_len);
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96
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97 for (int i = 0; i < tree_children_len; i++)
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98 state_property_cookies.push_back(
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99 ::xcb_get_property(connection, 0, tree_children[i], Atom_WM_STATE, Atom_WM_STATE, 0, 0));
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100
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101 for (int i = 0; i < tree_children_len; i++) {
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102 std::unique_ptr<xcb_get_property_reply_t> get_property_reply(
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103 ::xcb_get_property_reply(connection, state_property_cookies[i], NULL));
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104
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105 /* X11 is unfriendly here. what this means is "did the property exist?" */
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106 if (get_property_reply->format || get_property_reply->type || get_property_reply->length) {
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107 result.insert(tree_children[i]);
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108 if (depth >= CUTOFF)
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109 return true;
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110
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111 success |= true;
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112 continue;
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113 }
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114 }
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115
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116 if (WalkWindows(connection, depth + 1, Atom_WM_STATE, tree_children, tree_children_len, result)) {
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117 success |= true;
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118 if (depth >= CUTOFF)
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119 return true;
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120 continue;
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121 }
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122 }
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123
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124 return success;
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125 }
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126
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127 static bool GetAllTopLevelWindowsICCCM(xcb_connection_t* connection, const std::vector<xcb_window_t>& roots,
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128 std::set<xcb_window_t>& result) {
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129 bool success = false;
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130
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131 xcb_atom_t Atom_WM_STATE = [connection] {
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132 static constexpr std::string_view name = "WM_STATE";
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133 xcb_intern_atom_cookie_t cookie = ::xcb_intern_atom(connection, true, name.size(), name.data());
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134 xcb_intern_atom_reply_t* reply = ::xcb_intern_atom_reply(connection, cookie, NULL);
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135
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136 xcb_atom_t atom = reply->atom;
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137 free(reply);
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138 return atom;
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139 }();
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140 if (Atom_WM_STATE == XCB_ATOM_NONE)
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141 return success;
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142
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143 std::vector<xcb_query_tree_cookie_t> cookies;
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144 cookies.reserve(roots.size());
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145
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146 for (const auto& root : roots)
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147 cookies.push_back(::xcb_query_tree(connection, root));
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148
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149 for (const auto& cookie : cookies)
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150 success |= WalkWindows(connection, 0, Atom_WM_STATE, roots.data(), roots.size(), result);
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151
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152 return success;
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153 }
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154
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155 bool EnumerateWindows(window_proc_t window_proc) {
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156 if (!window_proc)
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157 return false;
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158
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159 xcb_connection_t* connection = ::xcb_connect(NULL, NULL);
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160 if (xcb_connection_has_error(connection))
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161 return false;
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162
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163 std::set<xcb_window_t> windows;
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164 {
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165 std::vector<xcb_window_t> roots;
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166 {
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167 xcb_screen_iterator_t iter = ::xcb_setup_roots_iterator(::xcb_get_setup(connection));
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168 for (; iter.rem; ::xcb_screen_next(&iter))
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169 roots.push_back(iter.data->root);
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170 }
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171
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172 if (!GetAllTopLevelWindowsEWMH(connection, roots, windows))
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173 GetAllTopLevelWindowsICCCM(connection, roots, windows);
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174 }
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175
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176 struct WindowCookies {
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177 xcb_window_t window;
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178 xcb_get_property_cookie_t class_property_cookie;
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179 xcb_get_property_cookie_t name_property_cookie;
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180 xcb_res_query_client_ids_cookie_t pid_property_cookie;
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181 };
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182
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183 std::vector<WindowCookies> window_cookies;
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184 window_cookies.reserve(windows.size());
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185
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186 for (const auto& window : windows) {
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187 xcb_res_client_id_spec_t spec = {.client = window, .mask = XCB_RES_CLIENT_ID_MASK_LOCAL_CLIENT_PID};
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188
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189 WindowCookies window_cookie = {
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190 window, ::xcb_get_property(connection, 0, window, XCB_ATOM_WM_CLASS, XCB_ATOM_STRING, 0L, 2048L),
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191 ::xcb_get_property(connection, 0, window, XCB_ATOM_WM_NAME, XCB_ATOM_STRING, 0L, UINT_MAX),
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diff changeset
192 ::xcb_res_query_client_ids(connection, 1, &spec)};
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193
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194 window_cookies.push_back(window_cookie);
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195 }
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196
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Paper <paper@paper.us.eu.org>
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197 for (const auto& window_cookie : window_cookies) {
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198 Window win = {0};
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199 win.id = window_cookie.window;
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200 {
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201 /* Class name */
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202 std::unique_ptr<xcb_get_property_reply_t> reply(
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diff changeset
203 ::xcb_get_property_reply(connection, window_cookie.class_property_cookie, NULL));
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Paper <paper@paper.us.eu.org>
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diff changeset
204
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Paper <paper@paper.us.eu.org>
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diff changeset
205 if (reply && reply->format == 8) {
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Paper <paper@paper.us.eu.org>
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diff changeset
206 const char* data = reinterpret_cast<const char*>(::xcb_get_property_value(reply.get()));
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diff changeset
207 const int data_len = ::xcb_get_property_value_length(reply.get());
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diff changeset
208
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diff changeset
209 int instance_len = str_nlen(data, data_len);
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210 const char* class_name = data + instance_len + 1;
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Paper <paper@paper.us.eu.org>
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diff changeset
211
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diff changeset
212 win.class_name = std::string(class_name, str_nlen(class_name, data_len - (instance_len + 1)));
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diff changeset
213 }
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Paper <paper@paper.us.eu.org>
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diff changeset
214 }
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Paper <paper@paper.us.eu.org>
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215 {
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Paper <paper@paper.us.eu.org>
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diff changeset
216 /* Title text */
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diff changeset
217 std::unique_ptr<xcb_get_property_reply_t> reply(
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diff changeset
218 ::xcb_get_property_reply(connection, window_cookie.name_property_cookie, NULL));
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Paper <paper@paper.us.eu.org>
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diff changeset
219
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Paper <paper@paper.us.eu.org>
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diff changeset
220 if (reply) {
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Paper <paper@paper.us.eu.org>
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diff changeset
221 const char* data = reinterpret_cast<const char*>(::xcb_get_property_value(reply.get()));
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diff changeset
222 int len = ::xcb_get_property_value_length(reply.get());
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diff changeset
223
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Paper <paper@paper.us.eu.org>
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diff changeset
224 win.text = std::string(data, len);
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diff changeset
225 }
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Paper <paper@paper.us.eu.org>
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diff changeset
226 }
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Paper <paper@paper.us.eu.org>
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diff changeset
227 Process proc = {0};
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Paper <paper@paper.us.eu.org>
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diff changeset
228 {
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Paper <paper@paper.us.eu.org>
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diff changeset
229 /* PID */
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Paper <paper@paper.us.eu.org>
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diff changeset
230 std::unique_ptr<xcb_res_query_client_ids_reply_t> reply(
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diff changeset
231 ::xcb_res_query_client_ids_reply(connection, window_cookie.pid_property_cookie, NULL));
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Paper <paper@paper.us.eu.org>
parents: 283
diff changeset
232
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Paper <paper@paper.us.eu.org>
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diff changeset
233 if (reply) {
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Paper <paper@paper.us.eu.org>
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diff changeset
234 xcb_res_client_id_value_iterator_t it = ::xcb_res_query_client_ids_ids_iterator(reply.get());
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Paper <paper@paper.us.eu.org>
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diff changeset
235 for (; it.rem; ::xcb_res_client_id_value_next(&it)) {
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Paper <paper@paper.us.eu.org>
parents: 283
diff changeset
236 if (it.data->spec.mask & XCB_RES_CLIENT_ID_MASK_LOCAL_CLIENT_PID) {
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Paper <paper@paper.us.eu.org>
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diff changeset
237 proc.pid = *::xcb_res_client_id_value_value(it.data);
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Paper <paper@paper.us.eu.org>
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diff changeset
238 GetProcessName(proc.pid, proc.name); /* fill this in if we can */
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Paper <paper@paper.us.eu.org>
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diff changeset
239 break;
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Paper <paper@paper.us.eu.org>
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diff changeset
240 }
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Paper <paper@paper.us.eu.org>
parents: 283
diff changeset
241 }
b1f625b0227c *: convert all files CRLF -> LF
Paper <paper@paper.us.eu.org>
parents: 283
diff changeset
242 }
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Paper <paper@paper.us.eu.org>
parents: 283
diff changeset
243 }
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Paper <paper@paper.us.eu.org>
parents: 283
diff changeset
244
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Paper <paper@paper.us.eu.org>
parents: 283
diff changeset
245 if (!window_proc(proc, win)) {
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Paper <paper@paper.us.eu.org>
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diff changeset
246 ::xcb_disconnect(connection);
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Paper <paper@paper.us.eu.org>
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diff changeset
247 return false;
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Paper <paper@paper.us.eu.org>
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diff changeset
248 }
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Paper <paper@paper.us.eu.org>
parents: 283
diff changeset
249 }
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Paper <paper@paper.us.eu.org>
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diff changeset
250
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Paper <paper@paper.us.eu.org>
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diff changeset
251 ::xcb_disconnect(connection);
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Paper <paper@paper.us.eu.org>
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diff changeset
252
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Paper <paper@paper.us.eu.org>
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diff changeset
253 return true;
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Paper <paper@paper.us.eu.org>
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diff changeset
254 }
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Paper <paper@paper.us.eu.org>
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diff changeset
255
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256 } // namespace animone::internal::x11