view.c 8.3 KB

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  1. /*
  2. * view.c
  3. *
  4. * This file provides the implementation of a view class
  5. */
  6. #include "private.h"
  7. #include "lub/argv.h"
  8. #include "lub/string.h"
  9. #include "lub/ctype.h"
  10. #include "lub/list.h"
  11. #include <assert.h>
  12. #include <stdlib.h>
  13. #include <string.h>
  14. #include <stdio.h>
  15. /*-------------------------------------------------------- */
  16. int clish_view_compare(const void *first, const void *second)
  17. {
  18. const clish_view_t *f = (const clish_view_t *)first;
  19. const clish_view_t *s = (const clish_view_t *)second;
  20. return strcmp(f->name, s->name);
  21. }
  22. /*-------------------------------------------------------- */
  23. static void clish_view_init(clish_view_t * this, const char *name)
  24. {
  25. this->name = lub_string_dup(name);
  26. this->prompt = NULL;
  27. this->depth = 0;
  28. this->restore = CLISH_RESTORE_NONE;
  29. this->access = NULL;
  30. /* Init COMMAND list */
  31. this->cmds = lub_list_new(clish_command_compare, clish_command_delete);
  32. /* Init VAR list */
  33. this->vars = lub_list_new(clish_var_compare, clish_var_delete);
  34. /* Initialise the list of NAMESPACEs.
  35. * It's important to add new items to the
  36. * tail of list.
  37. */
  38. this->nspaces = lub_list_new(NULL, clish_nspace_delete);
  39. /* Initialize hotkey structures */
  40. this->hotkeys = clish_hotkeyv_new();
  41. }
  42. /*--------------------------------------------------------- */
  43. static void clish_view_fini(clish_view_t * this)
  44. {
  45. /* Free COMMAND list */
  46. lub_list_free_all(this->cmds);
  47. /* Free VAR list */
  48. lub_list_free_all(this->vars);
  49. /* Free NAMESPACE list */
  50. lub_list_free_all(this->nspaces);
  51. /* Free hotkey structures */
  52. clish_hotkeyv_delete(this->hotkeys);
  53. lub_string_free(this->name);
  54. lub_string_free(this->prompt);
  55. lub_string_free(this->access);
  56. }
  57. /*--------------------------------------------------------- */
  58. clish_view_t *clish_view_new(const char *name)
  59. {
  60. clish_view_t *this = malloc(sizeof(clish_view_t));
  61. if (this)
  62. clish_view_init(this, name);
  63. return this;
  64. }
  65. /*-------------------------------------------------------- */
  66. void clish_view_delete(void *data)
  67. {
  68. clish_view_t *this = (clish_view_t *)data;
  69. clish_view_fini(this);
  70. free(this);
  71. }
  72. /*--------------------------------------------------------- */
  73. /* Create new command and add it to list of commands */
  74. clish_command_t *clish_view_new_command(clish_view_t *this,
  75. const char *name, const char *help)
  76. {
  77. clish_command_t *cmd = clish_command_new(name, help);
  78. assert(cmd);
  79. clish_command__set_pview(cmd, this);
  80. if (!lub_list_add_uniq(this->cmds, cmd)) {
  81. clish_command_delete(cmd);
  82. cmd = NULL;
  83. }
  84. return cmd;
  85. }
  86. /*--------------------------------------------------------- */
  87. /* This method identifies the command (if any) which provides
  88. * the longest match with the specified line of text.
  89. *
  90. * NB this comparison is case insensitive.
  91. *
  92. * this - the view instance upon which to operate
  93. * line - the command line to analyse
  94. */
  95. clish_command_t *clish_view_resolve_prefix(clish_view_t *this,
  96. const char *line, bool_t inherit)
  97. {
  98. clish_command_t *result = NULL, *cmd;
  99. char *buffer = NULL;
  100. lub_argv_t *argv;
  101. unsigned int i;
  102. /* create a vector of arguments */
  103. argv = lub_argv_new(line, 0);
  104. for (i = 0; i < lub_argv__get_count(argv); i++) {
  105. /* set our buffer to be that of the first "i" arguments */
  106. lub_string_cat(&buffer, lub_argv__get_arg(argv, i));
  107. /* set the result to the longest match */
  108. cmd = clish_view_find_command(this, buffer, inherit);
  109. /* job done */
  110. if (!cmd)
  111. break;
  112. result = cmd;
  113. /* ready for the next word */
  114. lub_string_cat(&buffer, " ");
  115. }
  116. /* free up our dynamic storage */
  117. lub_string_free(buffer);
  118. lub_argv_delete(argv);
  119. return result;
  120. }
  121. /*--------------------------------------------------------- */
  122. clish_command_t *clish_view_resolve_command(clish_view_t *this,
  123. const char *line, bool_t inherit)
  124. {
  125. clish_command_t *result = clish_view_resolve_prefix(this, line, inherit);
  126. if (result) {
  127. clish_action_t *action = clish_command__get_action(result);
  128. clish_config_t *config = clish_command__get_config(result);
  129. if (!clish_action__get_script(action) &&
  130. (!clish_action__get_builtin(action)) &&
  131. (CLISH_CONFIG_NONE == clish_config__get_op(config)) &&
  132. (!clish_command__get_param_count(result)) &&
  133. (!clish_command__get_viewname(result))) {
  134. /* if this doesn't do anything we've
  135. * not resolved a command
  136. */
  137. result = NULL;
  138. }
  139. }
  140. return result;
  141. }
  142. /*--------------------------------------------------------- */
  143. clish_command_t *clish_view_find_command(clish_view_t *this,
  144. const char *name, bool_t inherit)
  145. {
  146. clish_command_t *result = NULL;
  147. /* Search the current view */
  148. result = lub_list_find(this->cmds, clish_command_fn_find_by_name, name);
  149. if (inherit) {
  150. lub_list_node_t *iter;
  151. clish_command_t *cmd;
  152. clish_nspace_t *nspace;
  153. /* Iterate elements. It's important to iterate
  154. * items starting from tail because the next
  155. * NAMESPACE has higher priority than previous one
  156. * in a case then the both NAMESPACEs have the
  157. * commands with the same name.
  158. */
  159. for(iter = lub_list__get_tail(this->nspaces);
  160. iter; iter = lub_list_node__get_prev(iter)) {
  161. nspace = (clish_nspace_t *)lub_list_node__get_data(iter);
  162. cmd = clish_nspace_find_command(nspace, name);
  163. /* Choose the longest match */
  164. result = clish_command_choose_longest(result, cmd);
  165. }
  166. }
  167. return result;
  168. }
  169. /*--------------------------------------------------------- */
  170. static const clish_command_t *find_next_completion(clish_view_t * this,
  171. const char *iter_cmd, const char *line)
  172. {
  173. #if 0 // WORK
  174. clish_command_t *cmd;
  175. const char *name = "";
  176. lub_argv_t *largv;
  177. unsigned words;
  178. /* build an argument vector for the line */
  179. largv = lub_argv_new(line, 0);
  180. words = lub_argv__get_count(largv);
  181. /* account for trailing space */
  182. if (!*line || lub_ctype_isspace(line[strlen(line) - 1]))
  183. words++;
  184. if (iter_cmd)
  185. name = iter_cmd;
  186. while ((cmd = lub_bintree_findnext(&this->tree, name))) {
  187. name = clish_command__get_name(cmd);
  188. if (words == lub_string_wordcount(name)) {
  189. /* only bother with commands of which this line is a prefix */
  190. /* this is a completion */
  191. if (lub_string_nocasestr(name, line) == name)
  192. break;
  193. }
  194. }
  195. /* clean up the dynamic memory */
  196. lub_argv_delete(largv);
  197. return cmd;
  198. #endif
  199. return NULL;
  200. }
  201. /*--------------------------------------------------------- */
  202. const clish_command_t *clish_view_find_next_completion(clish_view_t * this,
  203. const char *iter_cmd, const char *line,
  204. clish_nspace_visibility_e field, bool_t inherit)
  205. {
  206. const clish_command_t *result, *cmd;
  207. clish_nspace_t *nspace;
  208. lub_list_node_t *iter;
  209. /* ask local view for next command */
  210. result = find_next_completion(this, iter_cmd, line);
  211. if (!inherit)
  212. return result;
  213. /* ask the imported namespaces for next command */
  214. /* Iterate elements */
  215. for(iter = lub_list__get_tail(this->nspaces);
  216. iter; iter = lub_list_node__get_prev(iter)) {
  217. nspace = (clish_nspace_t *)lub_list_node__get_data(iter);
  218. if (!clish_nspace__get_visibility(nspace, field))
  219. continue;
  220. cmd = clish_nspace_find_next_completion(nspace,
  221. iter_cmd, line, field);
  222. if (clish_command_diff(result, cmd) > 0)
  223. result = cmd;
  224. }
  225. return result;
  226. }
  227. /*--------------------------------------------------------- */
  228. void clish_view_insert_nspace(clish_view_t * this, clish_nspace_t * nspace)
  229. {
  230. lub_list_add(this->nspaces, nspace);
  231. }
  232. /*--------------------------------------------------------- */
  233. void clish_view_clean_proxy(clish_view_t * this)
  234. {
  235. lub_list_node_t *iter;
  236. /* Iterate elements */
  237. for(iter = lub_list__get_head(this->nspaces);
  238. iter; iter = lub_list_node__get_next(iter)) {
  239. clish_nspace_clean_proxy((clish_nspace_t *)lub_list_node__get_data(iter));
  240. }
  241. }
  242. /*--------------------------------------------------------- */
  243. int clish_view_insert_hotkey(const clish_view_t *this, const char *key, const char *cmd)
  244. {
  245. return clish_hotkeyv_insert(this->hotkeys, key, cmd);
  246. }
  247. /*--------------------------------------------------------- */
  248. const char *clish_view_find_hotkey(const clish_view_t *this, int code)
  249. {
  250. return clish_hotkeyv_cmd_by_code(this->hotkeys, code);
  251. }
  252. CLISH_GET(view, lub_list_t *, nspaces);
  253. CLISH_GET(view, lub_list_t *, cmds);
  254. CLISH_GET(view, lub_list_t *, vars);
  255. CLISH_GET_STR(view, name);
  256. CLISH_SET_STR_ONCE(view, prompt);
  257. CLISH_GET_STR(view, prompt);
  258. CLISH_SET_STR(view, access);
  259. CLISH_GET_STR(view, access);
  260. CLISH_SET(view, unsigned int, depth);
  261. CLISH_GET(view, unsigned int, depth);
  262. CLISH_SET(view, clish_view_restore_e, restore);
  263. CLISH_GET(view, clish_view_restore_e, restore);