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 | GObject object; |
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7 | /* hierarchy information */ |
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8 | owl_window *parent; |
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9 | owl_window *child; |
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10 | owl_window *next, *prev; |
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11 | /* flags */ |
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12 | int dirty : 1; |
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13 | int dirty_subtree : 1; |
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14 | int shown : 1; |
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15 | int is_screen : 1; |
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16 | /* window information */ |
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17 | WINDOW *win; |
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18 | PANEL *pan; |
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19 | int nlines, ncols; |
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20 | int begin_y, begin_x; |
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21 | }; |
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22 | |
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23 | enum { |
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24 | REDRAW, |
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25 | RESIZED, |
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26 | LAST_SIGNAL |
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27 | }; |
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28 | |
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29 | static guint window_signals[LAST_SIGNAL] = { 0 }; |
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30 | |
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31 | static void owl_window_dispose(GObject *gobject); |
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32 | static void owl_window_finalize(GObject *gobject); |
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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_link(owl_window *w, owl_window *parent); |
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37 | |
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38 | static void _owl_window_create_curses(owl_window *w); |
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39 | static void _owl_window_destroy_curses(owl_window *w); |
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40 | |
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41 | static void _owl_window_realize(owl_window *w); |
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42 | static void _owl_window_unrealize(owl_window *w); |
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43 | |
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44 | static owl_window *cursor_owner; |
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45 | static owl_window *default_cursor; |
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46 | |
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47 | G_DEFINE_TYPE (OwlWindow, owl_window, G_TYPE_OBJECT) |
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48 | |
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49 | static void owl_window_class_init (OwlWindowClass *klass) |
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50 | { |
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51 | GObjectClass *gobject_class = G_OBJECT_CLASS (klass); |
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52 | |
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53 | /* Set up the vtabl */ |
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54 | gobject_class->dispose = owl_window_dispose; |
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55 | gobject_class->finalize = owl_window_finalize; |
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56 | |
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57 | klass->redraw = NULL; |
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58 | klass->resized = NULL; |
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59 | |
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60 | /* Create the signals, remember IDs */ |
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61 | window_signals[REDRAW] = |
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62 | g_signal_new("redraw", |
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63 | G_TYPE_FROM_CLASS(gobject_class), |
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64 | G_SIGNAL_RUN_CLEANUP, |
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65 | G_STRUCT_OFFSET(OwlWindowClass, redraw), |
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66 | NULL, NULL, |
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67 | g_cclosure_marshal_VOID__POINTER, |
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68 | G_TYPE_NONE, |
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69 | 1, |
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70 | G_TYPE_POINTER, NULL); |
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71 | |
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72 | /* TODO: maybe type should be VOID__INT_INT_INT_INT; will need to generate a |
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73 | * marshaller */ |
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74 | window_signals[RESIZED] = |
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75 | g_signal_new("resized", |
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76 | G_TYPE_FROM_CLASS(gobject_class), |
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77 | G_SIGNAL_RUN_FIRST, |
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78 | G_STRUCT_OFFSET(OwlWindowClass, resized), |
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79 | NULL, NULL, |
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80 | g_cclosure_marshal_VOID__VOID, |
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81 | G_TYPE_NONE, |
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82 | 0, |
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83 | NULL); |
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84 | } |
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85 | |
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86 | static void owl_window_dispose (GObject *object) |
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87 | { |
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88 | owl_window *w = OWL_WINDOW (object); |
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89 | |
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90 | /* Unmap the window */ |
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91 | owl_window_hide (w); |
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92 | |
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93 | /* Unlink and unref all children */ |
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94 | while (w->child) { |
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95 | owl_window *child = w->child; |
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96 | owl_window_unlink (child); |
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97 | } |
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98 | |
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99 | /* Remove from hierarchy */ |
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100 | owl_window_unlink (w); |
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101 | |
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102 | G_OBJECT_CLASS (owl_window_parent_class)->dispose (object); |
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103 | } |
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104 | |
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105 | static void owl_window_finalize (GObject *object) |
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106 | { |
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107 | owl_window *w = OWL_WINDOW(object); |
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108 | |
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109 | if (w->pan) { |
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110 | del_panel(w->pan); |
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111 | w->pan = NULL; |
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112 | } |
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113 | |
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114 | G_OBJECT_CLASS (owl_window_parent_class)->finalize (object); |
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115 | } |
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116 | |
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117 | static void owl_window_init (owl_window *w) |
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118 | { |
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119 | } |
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120 | |
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121 | /** singletons **/ |
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122 | |
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123 | static WINDOW *_dummy_window(void) |
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124 | { |
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125 | static WINDOW *dummy = NULL; |
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126 | if (!dummy) { |
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127 | dummy = newwin(1, 1, 0, 0); |
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128 | } |
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129 | return dummy; |
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130 | } |
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131 | |
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132 | owl_window *owl_window_get_screen(void) |
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133 | { |
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134 | static owl_window *screen = NULL; |
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135 | if (!screen) { |
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136 | /* The screen is magical. It's 'shown', but the only mean of it going |
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137 | * invisible is if we're tore down curses (i.e. screen resize) */ |
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138 | screen = _owl_window_new(NULL, g.lines, g.cols, 0, 0); |
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139 | screen->is_screen = 1; |
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140 | owl_window_show(screen); |
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141 | } |
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142 | return screen; |
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143 | } |
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144 | |
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145 | /** Creation and Destruction **/ |
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146 | |
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147 | owl_window *owl_window_new(owl_window *parent) |
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148 | { |
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149 | if (!parent) |
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150 | parent = owl_window_get_screen(); |
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151 | return _owl_window_new(parent, 0, 0, 0, 0); |
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152 | } |
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153 | |
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154 | static owl_window *_owl_window_new(owl_window *parent, int nlines, int ncols, int begin_y, int begin_x) |
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155 | { |
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156 | owl_window *w; |
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157 | |
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158 | w = g_object_new (OWL_TYPE_WINDOW, NULL); |
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159 | if (w == NULL) g_error("Failed to create owl_window instance"); |
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160 | |
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161 | w->nlines = nlines; |
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162 | w->ncols = ncols; |
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163 | w->begin_y = begin_y; |
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164 | w->begin_x = begin_x; |
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165 | |
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166 | _owl_window_link(w, parent); |
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167 | if (parent && parent->is_screen) { |
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168 | w->pan = new_panel(_dummy_window()); |
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169 | set_panel_userptr(w->pan, w); |
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170 | } |
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171 | |
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172 | return w; |
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173 | } |
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174 | |
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175 | /** Hierarchy **/ |
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176 | |
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177 | void owl_window_unlink(owl_window *w) |
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178 | { |
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179 | /* make sure the window is unmapped first */ |
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180 | _owl_window_unrealize(w); |
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181 | /* unlink parent/child information */ |
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182 | if (w->parent) { |
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183 | if (w->prev) |
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184 | w->prev->next = w->next; |
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185 | if (w->next) |
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186 | w->next->prev = w->prev; |
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187 | if (w->parent->child == w) |
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188 | w->parent->child = w->next; |
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189 | w->parent = NULL; |
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190 | g_object_unref (w); |
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191 | } |
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192 | } |
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193 | |
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194 | static void _owl_window_link(owl_window *w, owl_window *parent) |
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195 | { |
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196 | if (w->parent == parent) |
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197 | return; |
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198 | |
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199 | owl_window_unlink(w); |
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200 | if (parent) { |
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201 | w->parent = parent; |
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202 | w->next = parent->child; |
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203 | parent->child = w; |
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204 | g_object_ref (w); |
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205 | } |
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206 | } |
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207 | |
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208 | /* mimic g_list_foreach for consistency */ |
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209 | void owl_window_children_foreach(owl_window *parent, GFunc func, gpointer user_data) |
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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, user_data); |
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216 | } |
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217 | } |
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218 | |
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219 | owl_window *owl_window_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 | owl_window *owl_window_first_child(owl_window *w) |
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225 | { |
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226 | return w->child; |
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227 | } |
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228 | |
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229 | owl_window *owl_window_next_sibling(owl_window *w) |
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230 | { |
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231 | return w->next; |
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232 | } |
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233 | |
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234 | owl_window *owl_window_previous_sibling(owl_window *w) |
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235 | { |
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236 | return w->prev; |
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237 | } |
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238 | |
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239 | /** Internal window management **/ |
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240 | |
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241 | static void _owl_window_create_curses(owl_window *w) |
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242 | { |
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243 | if (w->is_screen) { |
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244 | resizeterm(w->nlines, w->ncols); |
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245 | w->win = stdscr; |
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246 | } else { |
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247 | /* Explicitly disallow realizing an unlinked non-root */ |
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248 | if (w->parent == NULL || w->parent->win == NULL) |
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249 | return; |
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250 | if (w->pan) { |
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251 | w->win = newwin(w->nlines, w->ncols, w->begin_y, w->begin_x); |
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252 | replace_panel(w->pan, w->win); |
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253 | } else { |
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254 | w->win = derwin(w->parent->win, w->nlines, w->ncols, w->begin_y, w->begin_x); |
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255 | } |
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256 | } |
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257 | } |
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258 | |
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259 | static void _owl_window_destroy_curses(owl_window *w) |
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260 | { |
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261 | if (w->is_screen) { |
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262 | /* don't deallocate the dummy */ |
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263 | w->win = NULL; |
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264 | } else { |
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265 | if (w->pan) { |
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266 | /* panels assume their windows always exist, so we put in a fake one */ |
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267 | replace_panel(w->pan, _dummy_window()); |
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268 | } |
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269 | if (w->win) { |
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270 | /* and destroy our own window */ |
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271 | delwin(w->win); |
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272 | w->win = NULL; |
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273 | } |
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274 | } |
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275 | } |
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276 | |
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277 | void owl_window_show(owl_window *w) |
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278 | { |
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279 | w->shown = 1; |
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280 | _owl_window_realize(w); |
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281 | if (w->pan) |
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282 | show_panel(w->pan); |
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283 | } |
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284 | |
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285 | void owl_window_show_all(owl_window *w) |
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286 | { |
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287 | owl_window_show(w); |
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288 | owl_window_children_foreach(w, (GFunc)owl_window_show, 0); |
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289 | } |
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290 | |
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291 | void owl_window_hide(owl_window *w) |
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292 | { |
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293 | /* you can't unmap the screen */ |
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294 | if (w->is_screen) |
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295 | return; |
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296 | w->shown = 0; |
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297 | if (w->pan) |
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298 | hide_panel(w->pan); |
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299 | _owl_window_unrealize(w); |
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300 | } |
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301 | |
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302 | int owl_window_is_shown(owl_window *w) |
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303 | { |
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304 | return w->shown; |
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305 | } |
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306 | |
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307 | int owl_window_is_realized(owl_window *w) |
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308 | { |
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309 | return w->win != NULL; |
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310 | } |
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311 | |
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312 | int owl_window_is_toplevel(owl_window *w) |
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313 | { |
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314 | return w->pan != NULL; |
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315 | } |
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316 | |
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317 | int owl_window_is_subwin(owl_window *w) |
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318 | { |
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319 | return w->pan == NULL && !w->is_screen; |
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320 | } |
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321 | |
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322 | static void _owl_window_realize(owl_window *w) |
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323 | { |
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324 | /* check if we can create a window */ |
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325 | if ((w->parent && w->parent->win == NULL) |
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326 | || !w->shown |
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327 | || w->win != NULL) |
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328 | return; |
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329 | if (w->nlines <= 0 || w->ncols <= 0) |
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330 | return; |
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331 | _owl_window_create_curses(w); |
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332 | if (w->win == NULL) |
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333 | return; |
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334 | /* schedule a repaint */ |
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335 | owl_window_dirty(w); |
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336 | /* map the children */ |
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337 | owl_window_children_foreach(w, (GFunc)_owl_window_realize, 0); |
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338 | } |
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339 | |
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340 | static void _owl_window_unrealize(owl_window *w) |
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341 | { |
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342 | if (w->win == NULL) |
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343 | return; |
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344 | /* unmap all the children */ |
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345 | owl_window_children_foreach(w, (GFunc)_owl_window_unrealize, 0); |
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346 | _owl_window_destroy_curses(w); |
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347 | w->dirty = w->dirty_subtree = 0; |
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348 | /* subwins leave a mess in the parent; dirty it */ |
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349 | if (w->parent) |
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350 | owl_window_dirty(w->parent); |
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351 | } |
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352 | |
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353 | /** Painting and book-keeping **/ |
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354 | |
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355 | void owl_window_set_cursor(owl_window *w) |
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356 | { |
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357 | if (cursor_owner) |
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358 | g_object_remove_weak_pointer(G_OBJECT(cursor_owner), (gpointer*) &cursor_owner); |
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359 | cursor_owner = w; |
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360 | if (w) |
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361 | g_object_add_weak_pointer(G_OBJECT(w), (gpointer*) &cursor_owner); |
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362 | owl_window_dirty(owl_window_get_screen()); |
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363 | } |
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364 | |
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365 | void owl_window_set_default_cursor(owl_window *w) |
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366 | { |
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367 | if (default_cursor) |
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368 | g_object_remove_weak_pointer(G_OBJECT(default_cursor), (gpointer*) &default_cursor); |
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369 | default_cursor = w; |
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370 | if (w) |
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371 | g_object_add_weak_pointer(G_OBJECT(w), (gpointer*) &default_cursor); |
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372 | owl_window_dirty(owl_window_get_screen()); |
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373 | } |
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374 | |
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375 | static owl_window *_get_cursor(void) |
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376 | { |
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377 | if (cursor_owner && owl_window_is_realized(cursor_owner)) |
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378 | return cursor_owner; |
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379 | if (default_cursor && owl_window_is_realized(default_cursor)) |
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380 | return default_cursor; |
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381 | return owl_window_get_screen(); |
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382 | } |
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383 | |
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384 | void owl_window_dirty(owl_window *w) |
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385 | { |
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386 | if (!owl_window_is_realized(w)) |
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387 | return; |
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388 | if (!w->dirty) { |
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389 | w->dirty = 1; |
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390 | while (w && !w->dirty_subtree) { |
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391 | w->dirty_subtree = 1; |
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392 | w = w->parent; |
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393 | } |
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394 | } |
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395 | } |
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396 | |
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397 | void owl_window_dirty_children(owl_window *w) |
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398 | { |
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399 | owl_window_children_foreach(w, (GFunc)owl_window_dirty, 0); |
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400 | } |
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401 | |
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402 | static void _owl_window_redraw(owl_window *w) |
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403 | { |
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404 | if (!w->dirty) return; |
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405 | if (w->win && !w->is_screen) { |
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406 | if (owl_window_is_subwin(w)) { |
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407 | /* If a subwin, we might have gotten random touched lines from wsyncup or |
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408 | * past drawing. That information is useless, so we discard it all */ |
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409 | untouchwin(w->win); |
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410 | } |
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411 | g_signal_emit(w, window_signals[REDRAW], 0, w->win); |
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412 | wsyncup(w->win); |
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413 | } |
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414 | w->dirty = 0; |
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415 | } |
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416 | |
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417 | static void _owl_window_redraw_subtree(owl_window *w) |
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418 | { |
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419 | if (!w->dirty_subtree) |
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420 | return; |
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421 | _owl_window_redraw(w); |
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422 | owl_window_children_foreach(w, (GFunc)_owl_window_redraw_subtree, 0); |
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423 | w->dirty_subtree = 0; |
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424 | } |
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425 | |
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426 | /* |
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427 | Redraw all the windows with scheduled redraws. |
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428 | NOTE: This function shouldn't be called outside the event loop |
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429 | */ |
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430 | void owl_window_redraw_scheduled(void) |
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431 | { |
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432 | owl_window *cursor; |
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433 | owl_window *screen = owl_window_get_screen(); |
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434 | |
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435 | if (!screen->dirty_subtree) |
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436 | return; |
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437 | _owl_window_redraw_subtree(screen); |
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438 | update_panels(); |
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439 | cursor = _get_cursor(); |
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440 | if (cursor && cursor->win) { |
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441 | /* untouch it to avoid drawing; window should be clean now, but we must |
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442 | * clean up in case there was junk left over on a subwin (cleaning up after |
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443 | * subwin drawing isn't sufficient because a wsyncup messes up subwin |
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444 | * ancestors */ |
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445 | untouchwin(cursor->win); |
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446 | wnoutrefresh(cursor->win); |
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447 | } |
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448 | doupdate(); |
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449 | } |
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450 | |
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451 | /** Window position **/ |
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452 | |
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453 | void owl_window_get_position(owl_window *w, int *nlines, int *ncols, int *begin_y, int *begin_x) |
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454 | { |
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455 | if (nlines) *nlines = w->nlines; |
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456 | if (ncols) *ncols = w->ncols; |
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457 | if (begin_y) *begin_y = w->begin_y; |
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458 | if (begin_x) *begin_x = w->begin_x; |
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459 | } |
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460 | |
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461 | void owl_window_move(owl_window *w, int begin_y, int begin_x) |
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462 | { |
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463 | /* It is possible to move a window efficiently with move_panel and mvderwin, |
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464 | * but begy and begx are then wrong. Currently, this only effects the |
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465 | * wnoutrefresh to move cursor. TODO: fix that and reinstate that |
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466 | * optimization if it's worth the trouble */ |
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467 | owl_window_set_position(w, w->nlines, w->ncols, begin_y, begin_x); |
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468 | } |
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469 | |
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470 | void owl_window_set_position(owl_window *w, int nlines, int ncols, int begin_y, int begin_x) |
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471 | { |
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472 | int resized; |
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473 | |
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474 | if (w->nlines == nlines && w->ncols == ncols |
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475 | && w->begin_y == begin_y && w->begin_x == begin_x) { |
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476 | return; |
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477 | } |
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478 | resized = w->nlines != nlines || w->ncols != ncols; |
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479 | |
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480 | _owl_window_unrealize(w); |
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481 | w->begin_y = begin_y; |
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482 | w->begin_x = begin_x; |
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483 | w->nlines = nlines; |
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484 | w->ncols = ncols; |
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485 | if (resized) |
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486 | g_signal_emit(w, window_signals[RESIZED], 0); |
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487 | if (w->shown) { |
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488 | /* ncurses is screwy: give up and recreate windows at the right place */ |
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489 | _owl_window_realize(w); |
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490 | } |
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491 | } |
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492 | |
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493 | void owl_window_resize(owl_window *w, int nlines, int ncols) |
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494 | { |
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495 | owl_window_set_position(w, nlines, ncols, w->begin_y, w->begin_x); |
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496 | } |
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