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annotate nodejs/X_supp_njs.c @ 550:127499ab2412 Android_Skia

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Upgrade ndoejs plugin to level of a new runtime. Original, nodejs plugin is a variant of X runtime. But, now, I think it had better a new runtime that reuse code of X runtime. It would be easier to maintain.
author Thinker K.F. Li <thinker@branda.to>
date Sun, 06 Jun 2010 13:58:01 +0800
parents 249bcbf07eb0
children 9e69c4a0f565
rev   line source
546
249bcbf07eb0 Reuse and adapt X_supp.c by implmeneting X_supp_njs.c
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1 /*! \brief Implement X11 backend for nodejs plugin.
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2 *
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3 * Since nodejs use libev to handle event loops, part of X11 backend
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4 * code can not be used directly. The part of code should be rewrote.
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5 * The part is about
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6 */
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7 #include <stdio.h>
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8 #include <X11/Xlib.h>
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9 #include <X11/Xutil.h>
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10 #include <ev.h>
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11 #include "mb_X_supp.h"
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12 #include "mb_tools.h"
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13
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14 #ifndef ASSERT
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15 #define ASSERT(x)
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16 #endif
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17
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18 typedef struct _njs_ev_data {
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19 ev_io iowatcher;
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20 ev_timer tmwatcher;
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21 int enable_timer;
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22 void *rt;
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23 } njs_ev_data_t;
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24
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25 static void timer_cb(EV_P_ ev_timer *tmwatcher, int revent);
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26
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27 /*! \brief Register next timeout with libev.
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28 */
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29 static void
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30 set_next_timeout(njs_ev_data_t *ev_data) {
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31 mb_tman_t *tman;
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32 mb_timeval_t now, tmo;
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33 ev_tstamp tout;
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34 int r;
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35
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36 tman = X_MB_tman(ev_data->rt);
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37 get_now(&now);
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38 r = mb_tman_next_timeout(tman, &now, &tmo);
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39 if(r == 0) {
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40 MB_TIMEVAL_DIFF(&tmo, &now);
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41 tout = (ev_tstamp)MB_TIMEVAL_SEC(&tmo) +
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42 (ev_tstamp)MB_TIMEVAL_USEC(&tmo) / 1000000;
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43 ev_timer_init(&ev_data->tmwatcher, timer_cb, tout, 0);
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44 ev_timer_start(&ev_data->tmwatcher);
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45 ev_data->enable_timer = 1;
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46 } else
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47 ev_data->enable_timer = 0;
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48 }
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49
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50 static void
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51 x_conn_cb(EV_P_ ev_io *iowatcher, int revent) {
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52 njs_ev_data_t *ev_data = MEM2OBJ(iowatcher, njs_ev_data_t, iowatcher);
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53 redraw_man_t *rdman;
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54 extern void _X_MB_handle_x_event_for_nodejs(void *rt);
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55
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56 rdman = X_MB_rdman(ev_data->rt);
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57 _X_MB_handle_x_event_for_nodejs(ev_data->rt);
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58 rdman_redraw_changed(rdman);
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59
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60 if(ev_data->enable_timer == 0) /* no installed timeout */
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61 set_next_timeout(ev_data);
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62 }
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63
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64 static void
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65 timer_cb(EV_P_ ev_timer *tmwatcher, int revent) {
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66 njs_ev_data_t *ev_data = MEM2OBJ(tmwatcher, njs_ev_data_t, tmwatcher);
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67 mb_tman_t *tman;
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68 redraw_man_t *rdman;
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69 mb_timeval_t now;
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70 extern int _X_MB_flush_x_conn_nodejs(void *rt);
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71
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72 tman = X_MB_tman(ev_data->rt);
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73 get_now(&now);
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74 mb_tman_handle_timeout(tman, &now);
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75
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76 rdman = X_MB_rdman(ev_data->rt);
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77 rdman_redraw_changed(rdman);
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78 _X_MB_flush_x_conn_nodejs(ev_data->rt);
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79
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80 set_next_timeout(ev_data);
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81 }
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82
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83 /*! \brief Handle connection coming data and timeout of timers.
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84 *
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85 * \param rt is a runtime object for X.
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86 */
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87 void
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88 X_njs_MB_handle_connection(njs_ev_data_t *ev_data) {
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89 void *rt = ev_data->rt;
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90 mb_tman_t *tman;
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91 mb_timeval_t now, tmo;
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92 ev_tstamp tout;
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93 int fd;
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94 int r;
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95 extern int _X_MB_get_x_conn_for_nodejs(void *rt);
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96
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97 /*
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98 * Setup watcher for X connection.
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99 */
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100 fd = _X_MB_get_x_conn_for_nodejs(rt);
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101 ev_io_init(&ev_data->iowatcher, x_conn_cb, fd, EV_READ);
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102 ev_io_start(&ev_data->iowatcher);
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103
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104 set_next_timeout(ev_data);
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105 }
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106
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107 /*! \brief Free njs_ev_data_t.
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108 */
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109 void
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110 X_njs_MB_free(njs_ev_data_t *ev_data) {
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111 /*
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112 * stop IO and timer watcher
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113 */
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114 ev_io_stop(&ev_data->iowatcher);
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115 if(ev_data->enable_timer)
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116 ev_timer_stop(&ev_data->tmwatcher);
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117 }
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118
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119 njs_ev_data_t *
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120 X_njs_MB_new(char *display_name, int w, int h) {
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121 njs_ev_data_t *ev_data;
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122 void *rt;
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123
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124 ev_data = (njs_ev_data_t *)malloc(sizeof(njs_ev_data_t));
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125 ASSERT(ev_data != NULL);
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126
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127 rt = X_MB_new(display_name, w, h);
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128
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129 ev_data->rt = rt;
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130 ev_data->enable_timer = 0; /* no timer, now */
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131
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132 return ev_data;
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133 }
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134
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135 void *
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136 _X_njs_MB_get_runtime(nsj_ev_data_t *ev_data) {
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137 return ev_data->rt;
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138 }