source: keybinding.c

Last change on this file was 7dcef03, checked in by Anders Kaseorg <andersk@mit.edu>, 4 years ago
Use the Glib slice allocator for fixed-size objects The slice allocator, available since GLib 2.10, is more space-efficient than [g_]malloc. Since BarnOwl is obviously at the leading edge of space-efficient technology, this seems like a natural fit. Use it for every fixed-size object except owl_viewwin_search_data (which would need an extra destroy_cbdata function to g_slice_free it). Signed-off-by: Anders Kaseorg <andersk@mit.edu>
  • Property mode set to 100644
File size: 3.6 KB
Line 
1#include "owl.h"
2
3/*
4 * TODO: Idea for allowing functions to be user-specified ---
5 *      Have function have a context bitmask that says where it
6 *      can be used, and have keymaps also have one, and compare
7 *      the two when setting.
8 *     
9 */
10
11static int owl_keybinding_make_keys(owl_keybinding *kb, const char *keyseq);
12
13/* sets up a new keybinding for a command */
14CALLER_OWN owl_keybinding *owl_keybinding_new(const char *keyseq, const char *command, void (*function_fn)(void), const char *desc)
15{
16  owl_keybinding *kb = g_slice_new(owl_keybinding);
17
18  owl_function_debugmsg("owl_keybinding_init: creating binding for <%s> with desc: <%s>", keyseq, desc);
19  if (command && function_fn) {
20    g_slice_free(owl_keybinding, kb);
21    return NULL;
22  } else if (command && !function_fn) {
23    kb->type = OWL_KEYBINDING_COMMAND;
24  } else if (!command && function_fn) {
25    kb->type = OWL_KEYBINDING_FUNCTION;
26  } else {
27    kb->type = OWL_KEYBINDING_NOOP;
28  }
29
30  if (owl_keybinding_make_keys(kb, keyseq) != 0) {
31    g_slice_free(owl_keybinding, kb);
32    return NULL;
33  }
34
35  kb->command = g_strdup(command);
36  kb->function_fn = function_fn;
37  kb->desc = g_strdup(desc);
38  return kb;
39}
40
41static int owl_keybinding_make_keys(owl_keybinding *kb, const char *keyseq)
42{
43  char **ktokens;
44  int    nktokens, i;
45
46  ktokens = g_strsplit_set(keyseq, " ", 0);
47  nktokens = g_strv_length(ktokens);
48  if (nktokens < 1 || nktokens > OWL_KEYMAP_MAXSTACK) {
49    g_strfreev(ktokens);
50    return(-1);
51  }
52  kb->keys = g_new(int, nktokens);
53  for (i=0; i<nktokens; i++) {
54    kb->keys[i] = owl_keypress_fromstring(ktokens[i]);
55    if (kb->keys[i] == ERR) {
56      g_strfreev(ktokens);
57      g_free(kb->keys);
58      return(-1);
59    }
60  }
61  kb->len = nktokens;
62  g_strfreev(ktokens);
63  return(0);
64}
65
66/* Releases data associated with a keybinding, and the kb itself */
67void owl_keybinding_delete(owl_keybinding *kb)
68{
69  g_free(kb->keys);
70  g_free(kb->desc);
71  g_free(kb->command);
72  g_slice_free(owl_keybinding, kb);
73}
74
75/* executes a keybinding */
76void owl_keybinding_execute(const owl_keybinding *kb, int j)
77{
78  if (kb->type == OWL_KEYBINDING_COMMAND && kb->command) {
79    owl_function_command_norv(kb->command);
80  } else if (kb->type == OWL_KEYBINDING_FUNCTION && kb->function_fn) {
81    kb->function_fn();
82  }
83}
84
85CALLER_OWN char *owl_keybinding_stack_tostring(int *j, int len)
86{
87  GString *string;
88  int  i;
89
90  string = g_string_new("");
91  for (i = 0; i < len; i++) {
92    char *keypress = owl_keypress_tostring(j[i], 0);
93    g_string_append(string, keypress ? keypress : "INVALID");
94    g_free(keypress);
95    if (i < len - 1) g_string_append_c(string, ' ');
96  }
97  return g_string_free(string, false);
98}
99
100CALLER_OWN char *owl_keybinding_tostring(const owl_keybinding *kb)
101{
102  return owl_keybinding_stack_tostring(kb->keys, kb->len);
103}
104
105const char *owl_keybinding_get_desc(const owl_keybinding *kb)
106{
107  return kb->desc;
108}
109
110/* returns 0 on no match, 1 on subset match, and 2 on complete match */
111int owl_keybinding_match(const owl_keybinding *kb, const owl_keyhandler *kh)
112{
113  int i;
114  for(i = 0; i <= kh->kpstackpos && i < kb->len; i++) {
115    if(kb->keys[i] != kh->kpstack[i])
116      return 0;
117  }
118
119  /* If we've made it to this point, then they match as far as they are. */
120  if(kb->len == kh->kpstackpos + 1) {
121    /* Equal length */
122    return 2;
123  } else if(kb->len > kh->kpstackpos + 1) {
124    return 1;
125  }
126
127  return 0;
128}
129
130/* returns 1 if keypress sequence is the same */
131int owl_keybinding_equal(const owl_keybinding *kb1, const owl_keybinding *kb2)
132{
133  int i;
134
135  if(kb1->len != kb2->len) return 0;
136
137  for(i = 0; i < kb1->len; i++) {
138    if(kb1->keys[i] != kb2->keys[i])
139      return 0;
140  }
141
142  return 1;
143}
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