1 | #include "owl.h" |
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2 | |
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3 | #include <assert.h> |
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4 | |
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5 | struct _owl_window { /*noproto*/ |
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6 | /* hierarchy information */ |
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7 | owl_window *parent; |
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8 | owl_window *child; |
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9 | owl_window *next, *prev; |
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10 | /* flags */ |
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11 | int dirty : 1; |
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12 | int dirty_subtree : 1; |
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13 | int mapped : 1; |
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14 | int is_screen : 1; |
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15 | /* window information */ |
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16 | WINDOW *win; |
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17 | PANEL *pan; |
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18 | int nlines, ncols; |
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19 | int begin_y, begin_x; |
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20 | /* hooks */ |
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21 | void (*redraw_cb)(owl_window *, WINDOW *, void *); |
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22 | void *redraw_cbdata; |
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23 | void (*redraw_cbdata_destroy)(void *); |
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24 | |
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25 | void (*resize_cb)(owl_window *, void *); |
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26 | void *resize_cbdata; |
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27 | void (*resize_cbdata_destroy)(void *); |
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28 | |
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29 | void (*destroy_cb)(owl_window *, void *); |
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30 | void *destroy_cbdata; |
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31 | void (*destroy_cbdata_destroy)(void *); |
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32 | }; |
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33 | |
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34 | static owl_window *_owl_window_new(owl_window *parent, int nlines, int ncols, int begin_y, int begin_x); |
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35 | |
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36 | static void _owl_window_unlink(owl_window *w); |
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37 | static void _owl_window_link(owl_window *w, owl_window *parent); |
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38 | |
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39 | static void _owl_window_create_curses(owl_window *w); |
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40 | static void _owl_window_destroy_curses(owl_window *w); |
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41 | |
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42 | static void _owl_window_map_internal(owl_window *w); |
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43 | static void _owl_window_unmap_internal(owl_window *w); |
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44 | |
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45 | /** singletons **/ |
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46 | |
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47 | static WINDOW *_dummy_window(void) |
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48 | { |
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49 | static WINDOW *dummy = NULL; |
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50 | if (!dummy) { |
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51 | dummy = newwin(1, 1, 0, 0); |
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52 | } |
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53 | return dummy; |
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54 | } |
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55 | |
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56 | owl_window *owl_window_get_screen(void) |
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57 | { |
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58 | static owl_window *screen = NULL; |
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59 | if (!screen) { |
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60 | /* The screen is magical. It's 'mapped', but the only mean of it going |
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61 | * invisible is if we're tore down curses (i.e. screen resize) */ |
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62 | screen = _owl_window_new(NULL, g.lines, g.cols, 0, 0); |
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63 | screen->is_screen = 1; |
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64 | owl_window_map(screen, 0); |
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65 | } |
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66 | return screen; |
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67 | } |
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68 | |
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69 | /** Creation and Destruction **/ |
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70 | |
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71 | owl_window *owl_window_new(owl_window *parent, int nlines, int ncols, int begin_y, int begin_x) |
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72 | { |
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73 | if (!parent) |
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74 | parent = owl_window_get_screen(); |
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75 | return _owl_window_new(parent, nlines, ncols, begin_y, begin_x); |
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76 | } |
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77 | |
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78 | static owl_window *_owl_window_new(owl_window *parent, int nlines, int ncols, int begin_y, int begin_x) |
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79 | { |
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80 | owl_window *w; |
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81 | |
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82 | w = owl_malloc(sizeof(owl_window)); |
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83 | memset(w, 0, sizeof(*w)); |
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84 | |
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85 | w->nlines = nlines; |
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86 | w->ncols = ncols; |
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87 | w->begin_y = begin_y; |
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88 | w->begin_x = begin_x; |
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89 | |
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90 | _owl_window_link(w, parent); |
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91 | if (parent && parent->is_screen) { |
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92 | w->pan = new_panel(_dummy_window()); |
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93 | set_panel_userptr(w->pan, w); |
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94 | } |
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95 | |
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96 | return w; |
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97 | } |
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98 | |
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99 | void owl_window_delete(owl_window *w) |
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100 | { |
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101 | /* destroy all children */ |
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102 | owl_window_children_foreach_onearg(w, owl_window_delete); |
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103 | |
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104 | /* notify everyone of your imminent demise */ |
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105 | if (w->destroy_cb) |
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106 | w->destroy_cb(w, w->destroy_cbdata); |
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107 | |
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108 | /* clear all cbs */ |
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109 | owl_window_set_redraw_cb(w, 0, 0, 0); |
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110 | owl_window_set_resize_cb(w, 0, 0, 0); |
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111 | owl_window_set_destroy_cb(w, 0, 0, 0); |
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112 | |
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113 | /* destroy curses structures */ |
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114 | owl_window_unmap(w); |
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115 | if (w->pan) { |
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116 | del_panel(w->pan); |
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117 | } |
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118 | |
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119 | /* remove from hierarchy */ |
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120 | _owl_window_unlink(w); |
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121 | owl_free(w); |
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122 | } |
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123 | |
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124 | /** Callbacks **/ |
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125 | |
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126 | void owl_window_set_redraw_cb(owl_window *w, void (*cb)(owl_window*, WINDOW*, void*), void *cbdata, void (*cbdata_destroy)(void*)) |
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127 | { |
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128 | if (w->redraw_cbdata_destroy) { |
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129 | w->redraw_cbdata_destroy(w->redraw_cbdata); |
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130 | w->redraw_cbdata = 0; |
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131 | w->redraw_cbdata_destroy = 0; |
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132 | } |
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133 | |
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134 | w->redraw_cb = cb; |
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135 | w->redraw_cbdata = cbdata; |
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136 | w->redraw_cbdata_destroy = cbdata_destroy; |
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137 | |
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138 | /* mark the window as dirty, to take new cb in account */ |
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139 | owl_window_dirty(w); |
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140 | } |
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141 | |
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142 | void owl_window_set_resize_cb(owl_window *w, void (*cb)(owl_window*, void*), void *cbdata, void (*cbdata_destroy)(void*)) |
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143 | { |
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144 | if (w->resize_cbdata_destroy) { |
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145 | w->resize_cbdata_destroy(w->resize_cbdata); |
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146 | w->resize_cbdata = 0; |
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147 | w->resize_cbdata_destroy = 0; |
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148 | } |
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149 | |
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150 | w->resize_cb = cb; |
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151 | w->resize_cbdata = cbdata; |
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152 | w->resize_cbdata_destroy = cbdata_destroy; |
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153 | } |
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154 | |
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155 | void owl_window_set_destroy_cb(owl_window *w, void (*cb)(owl_window*, void*), void *cbdata, void (*cbdata_destroy)(void*)) |
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156 | { |
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157 | if (w->destroy_cbdata_destroy) { |
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158 | w->destroy_cbdata_destroy(w->destroy_cbdata); |
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159 | w->destroy_cbdata = 0; |
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160 | w->destroy_cbdata_destroy = 0; |
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161 | } |
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162 | |
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163 | w->destroy_cb = cb; |
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164 | w->destroy_cbdata = cbdata; |
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165 | w->destroy_cbdata_destroy = cbdata_destroy; |
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166 | } |
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167 | |
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168 | /** Hierarchy **/ |
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169 | |
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170 | static void _owl_window_unlink(owl_window *w) |
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171 | { |
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172 | /* unlink parent/child information */ |
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173 | if (w->parent) { |
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174 | if (w->prev) |
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175 | w->prev->next = w->next; |
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176 | if (w->next) |
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177 | w->next->prev = w->prev; |
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178 | if (w->parent->child == w) |
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179 | w->parent->child = w->next; |
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180 | } |
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181 | w->parent = NULL; |
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182 | } |
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183 | |
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184 | static void _owl_window_link(owl_window *w, owl_window *parent) |
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185 | { |
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186 | if (w->parent == parent) |
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187 | return; |
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188 | if (w->parent) |
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189 | _owl_window_unlink(w); |
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190 | |
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191 | w->parent = parent; |
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192 | if (parent) { |
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193 | w->next = parent->child; |
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194 | parent->child = w; |
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195 | } |
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196 | } |
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197 | |
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198 | /* mimic g_list_foreach for consistency */ |
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199 | void owl_window_children_foreach(owl_window *parent, GFunc func, gpointer user_data) |
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200 | { |
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201 | owl_window *w; |
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202 | for (w = parent->child; |
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203 | w != NULL; |
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204 | w = w->next) { |
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205 | func(w, user_data); |
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206 | } |
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207 | } |
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208 | |
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209 | void owl_window_children_foreach_onearg(owl_window *parent, void (*func)(owl_window*)) |
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210 | { |
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211 | owl_window *w; |
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212 | for (w = parent->child; |
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213 | w != NULL; |
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214 | w = w->next) { |
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215 | func(w); |
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216 | } |
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217 | } |
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218 | |
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219 | owl_window *owl_window_get_parent(owl_window *w) |
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220 | { |
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221 | return w->parent; |
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222 | } |
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223 | |
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224 | /** Internal window management **/ |
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225 | |
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226 | static void _owl_window_create_curses(owl_window *w) |
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227 | { |
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228 | if (w->is_screen) { |
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229 | resizeterm(w->nlines, w->ncols); |
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230 | w->win = stdscr; |
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231 | } else if (w->pan) { |
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232 | w->win = newwin(w->nlines, w->ncols, w->begin_y, w->begin_x); |
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233 | replace_panel(w->pan, w->win); |
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234 | } else { |
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235 | w->win = derwin(w->parent->win, w->nlines, w->ncols, w->begin_y, w->begin_x); |
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236 | } |
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237 | } |
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238 | |
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239 | static void _owl_window_destroy_curses(owl_window *w) |
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240 | { |
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241 | if (w->is_screen) { |
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242 | /* don't deallocate the dummy */ |
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243 | w->win = NULL; |
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244 | } else { |
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245 | if (w->pan) { |
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246 | /* panels assume their windows always exist, so we put in a fake one */ |
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247 | replace_panel(w->pan, _dummy_window()); |
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248 | } |
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249 | if (w->win) { |
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250 | /* and destroy our own window */ |
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251 | delwin(w->win); |
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252 | w->win = NULL; |
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253 | } |
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254 | } |
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255 | } |
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256 | |
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257 | static void _map_recurse_curry(owl_window *w) |
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258 | { |
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259 | owl_window_map(w, 1); |
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260 | } |
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261 | |
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262 | void owl_window_map(owl_window *w, int recurse) |
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263 | { |
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264 | w->mapped = 1; |
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265 | _owl_window_map_internal(w); |
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266 | if (w->pan) |
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267 | show_panel(w->pan); |
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268 | if (recurse) |
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269 | owl_window_children_foreach_onearg(w, _map_recurse_curry); |
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270 | } |
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271 | |
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272 | void owl_window_unmap(owl_window *w) |
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273 | { |
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274 | /* you can't unmap the screen */ |
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275 | if (w->is_screen) |
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276 | return; |
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277 | w->mapped = 0; |
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278 | if (w->pan) |
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279 | hide_panel(w->pan); |
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280 | _owl_window_unmap_internal(w); |
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281 | } |
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282 | |
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283 | int owl_window_is_mapped(owl_window *w) |
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284 | { |
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285 | return w->mapped; |
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286 | } |
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287 | |
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288 | int owl_window_is_visible(owl_window *w) |
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289 | { |
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290 | return w->win != NULL; |
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291 | } |
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292 | |
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293 | int owl_window_is_toplevel(owl_window *w) |
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294 | { |
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295 | return w->pan != NULL; |
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296 | } |
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297 | |
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298 | static void _owl_window_map_internal(owl_window *w) |
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299 | { |
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300 | /* check if we can create a window */ |
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301 | if ((w->parent && w->parent->win == NULL) |
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302 | || !w->mapped |
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303 | || w->win != NULL) |
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304 | return; |
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305 | _owl_window_create_curses(w); |
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306 | /* schedule a repaint */ |
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307 | owl_window_dirty(w); |
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308 | /* map the children, unless we failed */ |
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309 | if (w->win) |
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310 | owl_window_children_foreach_onearg(w, _owl_window_map_internal); |
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311 | } |
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312 | |
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313 | static void _owl_window_unmap_internal(owl_window *w) |
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314 | { |
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315 | if (w->win == NULL) |
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316 | return; |
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317 | /* unmap all the children */ |
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318 | owl_window_children_foreach_onearg(w, _owl_window_unmap_internal); |
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319 | _owl_window_destroy_curses(w); |
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320 | /* subwins leave a mess in the parent; dirty it */ |
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321 | if (w->parent) |
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322 | owl_window_dirty(w->parent); |
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323 | } |
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324 | |
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325 | /** Painting and book-keeping **/ |
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326 | |
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327 | void owl_window_dirty(owl_window *w) |
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328 | { |
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329 | /* don't put the screen on this list; pointless */ |
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330 | if (w->is_screen) |
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331 | return; |
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332 | if (!w->dirty) { |
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333 | w->dirty = 1; |
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334 | while (w && !w->dirty_subtree) { |
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335 | w->dirty_subtree = 1; |
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336 | w = w->parent; |
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337 | } |
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338 | owl_global_set_needrefresh(&g); |
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339 | } |
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340 | } |
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341 | |
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342 | void owl_window_dirty_children(owl_window *w) |
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343 | { |
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344 | owl_window_children_foreach_onearg(w, owl_window_dirty); |
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345 | } |
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346 | |
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347 | static void _owl_window_redraw(owl_window *w) |
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348 | { |
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349 | if (!w->dirty) return; |
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350 | if (w->win && w->redraw_cb) { |
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351 | w->redraw_cb(w, w->win, w->redraw_cbdata); |
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352 | wsyncup(w->win); |
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353 | } |
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354 | w->dirty = 0; |
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355 | } |
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356 | |
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357 | static void _owl_window_redraw_subtree(owl_window *w) |
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358 | { |
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359 | if (!w->dirty_subtree) |
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360 | return; |
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361 | _owl_window_redraw(w); |
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362 | owl_window_children_foreach_onearg(w, _owl_window_redraw_subtree); |
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363 | } |
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364 | |
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365 | /* |
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366 | Redraw all the windows with scheduled redraws. |
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367 | NOTE: This function shouldn't be called outside the event loop |
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368 | */ |
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369 | void owl_window_redraw_scheduled(void) |
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370 | { |
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371 | _owl_window_redraw_subtree(owl_window_get_screen()); |
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372 | } |
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373 | |
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374 | void owl_window_erase_cb(owl_window *w, WINDOW *win, void *user_data) |
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375 | { |
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376 | werase(win); |
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377 | owl_window_dirty_children(w); |
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378 | } |
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379 | |
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380 | /** Window position **/ |
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381 | |
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382 | void owl_window_get_position(owl_window *w, int *nlines, int *ncols, int *begin_y, int *begin_x) |
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383 | { |
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384 | if (nlines) *nlines = w->nlines; |
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385 | if (ncols) *ncols = w->ncols; |
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386 | if (begin_y) *begin_y = w->begin_y; |
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387 | if (begin_x) *begin_x = w->begin_x; |
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388 | } |
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389 | |
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390 | void owl_window_set_position(owl_window *w, int nlines, int ncols, int begin_y, int begin_x) |
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391 | { |
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392 | /* can't move the screen */ |
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393 | if (w->is_screen) { |
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394 | begin_y = begin_x = 0; |
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395 | } |
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396 | |
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397 | if (w->nlines == nlines && w->ncols == ncols) { |
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398 | /* moving is easier */ |
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399 | owl_window_move(w, begin_y, begin_x); |
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400 | return; |
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401 | } |
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402 | |
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403 | w->begin_y = begin_y; |
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404 | w->begin_x = begin_x; |
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405 | w->nlines = nlines; |
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406 | w->ncols = ncols; |
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407 | /* window is mapped, we must try to have a window at the end */ |
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408 | if (w->mapped) { |
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409 | /* resizing in ncurses is hard: give up do a unmap/map */ |
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410 | _owl_window_unmap_internal(w); |
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411 | } |
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412 | /* call the resize hooks BEFORE remapping, so that everything can resize */ |
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413 | if (w->resize_cb) |
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414 | w->resize_cb(w, w->resize_cbdata); |
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415 | if (w->mapped) { |
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416 | _owl_window_map_internal(w); |
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417 | } |
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418 | } |
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419 | |
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420 | void owl_window_resize(owl_window *w, int nlines, int ncols) |
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421 | { |
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422 | owl_window_set_position(w, nlines, ncols, w->begin_y, w->begin_x); |
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423 | } |
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424 | |
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425 | void owl_window_move(owl_window *w, int begin_y, int begin_x) |
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426 | { |
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427 | /* can't move the screen */ |
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428 | if (w->is_screen) return; |
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429 | |
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430 | w->begin_y = begin_y; |
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431 | w->begin_x = begin_x; |
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432 | if (w->mapped) { |
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433 | /* Window is mapped, we must try to have a window at the end */ |
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434 | if (w->win) { |
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435 | /* We actually do have a window; let's move it */ |
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436 | if (w->pan) { |
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437 | if (move_panel(w->pan, begin_y, begin_x) == OK) |
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438 | return; |
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439 | } else { |
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440 | if (mvderwin(w->win, begin_y, begin_x) == OK) { |
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441 | /* now both we and the parent are dirty */ |
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442 | owl_window_dirty(w->parent); |
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443 | owl_window_dirty(w); |
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444 | return; |
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445 | } |
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446 | } |
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447 | } |
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448 | /* We don't have a window or failed to move it. Fine. Brute force. */ |
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449 | _owl_window_unmap_internal(w); |
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450 | _owl_window_map_internal(w); |
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451 | } |
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452 | } |
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453 | |
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454 | /** Stacking order **/ |
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455 | |
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456 | void owl_window_top(owl_window *w) { |
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457 | if (!w->pan) { |
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458 | owl_function_debugmsg("Warning: owl_window_top only makes sense on top-level window"); |
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459 | return; |
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460 | } |
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461 | top_panel(w->pan); |
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462 | } |
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463 | |
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464 | owl_window *owl_window_above(owl_window *w) { |
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465 | PANEL *pan; |
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466 | |
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467 | if (!w->pan) { |
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468 | owl_function_debugmsg("Warning: owl_window_above only makes sense on top-level window"); |
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469 | return NULL; |
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470 | } |
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471 | pan = panel_above(w->pan); |
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472 | /* cast because panel_userptr pointlessly returns a const void * */ |
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473 | return pan ? (void*) panel_userptr(pan) : NULL; |
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474 | } |
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475 | |
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476 | owl_window *owl_window_below(owl_window *w) { |
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477 | PANEL *pan; |
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478 | |
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479 | if (!w->pan) { |
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480 | owl_function_debugmsg("Warning: owl_window_above only makes sense on top-level window"); |
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481 | return NULL; |
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482 | } |
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483 | pan = panel_below(w->pan); |
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484 | /* cast because panel_userptr pointlessly returns a const void * */ |
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485 | return pan ? (void*) panel_userptr(pan) : NULL; |
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486 | } |
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