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77
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1 #include <stdio.h>
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78
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2 #include <stdlib.h>
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3 #include <string.h>
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77
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4 #include <X11/Xlib.h>
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5 #include <X11/Xutil.h>
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78
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6 #include <cairo.h>
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7 #include <cairo-xlib.h>
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77
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8 #include "redraw_man.h"
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9 #include "mb_timer.h"
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78
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10 #include "X_supp.h"
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77
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11
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12
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78
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13 static unsigned int get_button_state(unsigned int state) {
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14 unsigned int but = 0;
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15
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16 if(state & Button1Mask)
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17 but |= MOUSE_BUT1;
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18 if(state & Button2Mask)
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19 but |= MOUSE_BUT2;
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20 if(state & Button3Mask)
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21 but |= MOUSE_BUT3;
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22
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23 return but;
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24 }
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25
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26 static unsigned int get_button(unsigned int button) {
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27 switch(button) {
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28 case Button1:
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29 return MOUSE_BUT1;
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30 case Button2:
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31 return MOUSE_BUT2;
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32 case Button3:
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33 return MOUSE_BUT3;
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34 }
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35 return 0;
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36 }
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37
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38 /*! \brief Notify observers of the shape at specified
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39 * position for mouse event.
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40 *
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41 * Observers of parent shapes may be called if the subject is not
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42 * with SUBF_STOP_PROPAGATE flag. The subject of mouse event
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43 * for a shape is returned by sh_get_mouse_event_subject().
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44 */
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45 static void notify_shapes(redraw_man_t *rdman,
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46 co_aix x, co_aix y, int etype,
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47 unsigned int state,
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48 unsigned int button) {
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49 mouse_event_t mouse_event;
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50 shape_t *shape;
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51 subject_t *subject;
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52 ob_factory_t *factory;
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53 int in_stroke;
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54
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55 mouse_event.event.type = etype;
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56 mouse_event.x = x;
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57 mouse_event.y = y;
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58 mouse_event.but_state = state;
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59 mouse_event.button = button;
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60
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61 shape = find_shape_at_pos(rdman, x, y,
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62 &in_stroke);
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63 if(shape == NULL)
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64 return;
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65 subject = sh_get_mouse_event_subject(shape);
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66 factory = rdman_get_ob_factory(rdman);
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67
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68 subject_notify(factory, subject, (event_t *)&mouse_event);
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69 }
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70
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71 /*! \brief Dispatch all X events in the queue.
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77
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72 */
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73 static void handle_x_event(Display *display,
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74 redraw_man_t *rdman,
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75 mb_tman_t *tman) {
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76 XEvent evt;
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77 XMotionEvent *mevt;
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78
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78 XButtonEvent *bevt;
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79 co_aix x, y;
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78
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80 unsigned int state, button;
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81 int r;
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82
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83 while(XEventsQueued(display, QueuedAfterReading) > 0) {
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84 r = XNextEvent(display, &evt);
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85 if(r == -1)
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86 break;
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87
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88 switch(evt.type) {
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78
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89 case ButtonPress:
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90 bevt = (XButtonEvent *)&evt;
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91 x = bevt->x;
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92 y = bevt->y;
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93 state = get_button_state(bevt->state);
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94 button = get_button(bevt->button);
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95
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96 notify_shapes(rdman, x, y, EVT_MOUSE_BUT_PRESS,
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97 state, button);
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98 break;
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99
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100 case ButtonRelease:
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101 bevt = (XButtonEvent *)&evt;
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102 x = bevt->x;
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103 y = bevt->y;
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104 state = get_button_state(bevt->state);
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105 button = get_button(bevt->button);
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106
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107 notify_shapes(rdman, x, y, EVT_MOUSE_BUT_RELEASE,
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108 state, button);
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109 break;
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110
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77
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111 case MotionNotify:
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112 mevt = (XMotionEvent *)&evt;
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113 x = mevt->x;
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114 y = mevt->y;
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115 state = get_button_state(mevt->state);
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116
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117 notify_shapes(rdman, x, y, EVT_MOUSE_MOVE, state, 0);
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118 break;
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119
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120 case Expose:
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121 rdman_redraw_area(rdman, evt.xexpose.x, evt.xexpose.y,
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122 evt.xexpose.width, evt.xexpose.height);
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123 break;
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124 }
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125 }
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126 rdman_redraw_changed(rdman);
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127 XFlush(display);
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128 }
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129
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130 /*! \brief Handle connection coming data and timeout of timers.
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78
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131 *
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132 * \param display is a Display returned by XOpenDisplay().
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133 * \param rdman is a redraw manager.
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134 * \param tman is a timer manager.
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135 *
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136 * The display is managed by specified rdman and tman. rdman draws
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137 * on the display, and tman trigger actions according timers.
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138 */
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78
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139 void X_MB_handle_connection(Display *display,
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140 redraw_man_t *rdman,
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141 mb_tman_t *tman) {
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142 int fd;
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143 mb_timeval_t now, tmo;
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144 struct timeval tv;
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145 fd_set rfds;
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146 int nfds;
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147 int r;
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148
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149 rdman_redraw_all(rdman);
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150 XFlush(display);
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151
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152 fd = XConnectionNumber(display);
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153 nfds = fd + 1;
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154 while(1) {
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155 FD_ZERO(&rfds);
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156 FD_SET(fd, &rfds);
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157
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158 get_now(&now);
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159 r = mb_tman_next_timeout(tman, &now, &tmo);
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160
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161 if(r == 0) {
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162 tv.tv_sec = MB_TIMEVAL_SEC(&tmo);
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163 tv.tv_usec = MB_TIMEVAL_USEC(&tmo);
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164 r = select(nfds, &rfds, NULL, NULL, &tv);
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165 } else
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166 r = select(nfds, &rfds, NULL, NULL, NULL);
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167
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168 if(r == -1) {
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169 perror("select");
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170 break;
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171 }
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172
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173 if(r == 0) {
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174 get_now(&now);
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175 mb_tman_handle_timeout(tman, &now);
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176 rdman_redraw_changed(rdman);
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177 XFlush(display);
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178 } else if(FD_ISSET(fd, &rfds)){
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179 handle_x_event(display, rdman, tman);
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180 }
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181 }
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182 }
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78
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183
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184 #define ERR -1
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185 #define OK 0
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186
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187 static int X_init_connection(const char *display_name,
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188 int w, int h,
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189 Display **displayp,
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190 Visual **visualp,
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191 Window *winp) {
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192 Display *display;
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193 Window root, win;
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194 Visual *visual;
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195 int screen;
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196 XSetWindowAttributes wattr;
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197 int depth;
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198 int x, y;
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199 int r;
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200
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201 display = XOpenDisplay(display_name);
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202 if(display == NULL)
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203 return ERR;
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204
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205 screen = DefaultScreen(display);
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206 root = DefaultRootWindow(display);
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207 visual = DefaultVisual(display, screen);
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208 depth = DefaultDepth(display, screen);
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209 wattr.override_redirect = False;
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210 x = 10;
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211 y = 10;
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212 win = XCreateWindow(display, root,
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213 x, y,
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214 w, h,
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215 1, depth, InputOutput, visual,
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216 CWOverrideRedirect, &wattr);
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217 r = XMapWindow(display, win);
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218 if(r == -1) {
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219 XCloseDisplay(display);
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220 return ERR;
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221 }
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222
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223 XSelectInput(display, win, PointerMotionMask | ExposureMask);
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224 XFlush(display);
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225
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226 *displayp = display;
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227 *visualp = visual;
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228 *winp = win;
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229
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230 return OK;
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231 }
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232
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233 /*! \brief Initialize a MadButterfy runtime for Xlib.
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234 *
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235 * It setups a runtime environment to run MadButterfly with Xlib.
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236 * Users should specify width and height of the opening window.
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237 */
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238 int X_MB_init(const char *display_name,
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239 int w, int h, X_MB_runtime_t *xmb_rt) {
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240 memset(xmb_rt, 0, sizeof(X_MB_runtime_t));
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241
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242 xmb_rt->w = w;
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243 xmb_rt->h = h;
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244 X_init_connection(display_name, w, h, &xmb_rt->display,
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245 &xmb_rt->visual, &xmb_rt->win);
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246
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247 xmb_rt->surface =
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248 cairo_image_surface_create(CAIRO_FORMAT_ARGB32, w, h);
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249
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250 xmb_rt->backend_surface =
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251 cairo_xlib_surface_create(xmb_rt->display,
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252 xmb_rt->win,
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253 xmb_rt->visual,
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254 w, h);
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255
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256 xmb_rt->cr = cairo_create(xmb_rt->surface);
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257 xmb_rt->backend_cr = cairo_create(xmb_rt->backend_surface);
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258
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259 cairo_set_source_surface(xmb_rt->backend_cr, xmb_rt->surface, 0, 0);
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260
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261 xmb_rt->rdman = (redraw_man_t *)malloc(sizeof(redraw_man_t));
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262 redraw_man_init(xmb_rt->rdman, xmb_rt->cr, xmb_rt->backend_cr);
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263
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264 xmb_rt->tman = mb_tman_new();
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265
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266 return OK;
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267 }
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268
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269 void X_MB_destroy(X_MB_runtime_t *xmb_rt) {
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270 if(xmb_rt->rdman) {
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271 redraw_man_destroy(xmb_rt->rdman);
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272 free(xmb_rt->rdman);
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273 }
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274
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275 if(xmb_rt->tman)
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276 mb_tman_free(xmb_rt->tman);
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277
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278 if(xmb_rt->cr)
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279 cairo_destroy(xmb_rt->cr);
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280 if(xmb_rt->backend_cr)
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281 cairo_destroy(xmb_rt->backend_cr);
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282
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283 if(xmb_rt->surface)
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284 cairo_surface_destroy(xmb_rt->surface);
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285 if(xmb_rt->backend_surface)
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286 cairo_surface_destroy(xmb_rt->backend_surface);
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287
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288 if(xmb_rt->display)
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289 XCloseDisplay(xmb_rt->display);
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290 }
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291
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