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#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <locale.h>
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <gst/gst.h>
typedef struct
{
gchar *name;
GSList *srcpads;
GSList *sinkpads;
GSList *srcpadtemplates;
GSList *sinkpadtemplates;
GSList *arguments;
} comp_element;
enum
{
ARG_INT,
ARG_FILENAME,
ARG_ENUM
};
typedef struct
{
gchar *name;
int type;
GSList *enums;
} comp_argument;
typedef struct
{
gint value;
gchar *nick;
} enum_value;
void
print_match_list (gchar * prefix, int len, GSList * wordlist)
{
GSList *words = wordlist;
while (words) {
if (!len || !strncmp ((gchar *) (words->data), prefix, len))
printf ("%s\n", (gchar *) (words->data));
words = g_slist_next (words);
}
}
int
match_element (comp_element * element, gchar * name)
{
return strcmp (element->name, name);
}
int
main (int argc, char *argv[])
{
xmlDocPtr doc;
xmlNodePtr rootnode, elementnode, propnode, argnode;
GList *element_list = NULL;
comp_element *element;
GSList *element_names = NULL;
comp_argument *argument;
enum_value *option;
gchar *prev_word;
gchar *partial_word;
int partial_len;
GList *elements;
GSList *pads;
int num_pads;
GSList *args;
gchar *word;
GSList *words = NULL;
struct stat stat_buf;
setlocale (LC_ALL, "");
if (argc < 4) {
fprintf (stderr, "gst-complete called with invalid arguments\n");
exit (1);
}
prev_word = argv[3];
partial_word = argv[2];
partial_len = strlen (partial_word);
/***** Loading the completion information from the registry *****/
if (stat (GST_CACHE_DIR "/compreg.xml", &stat_buf) == 0) {
doc = xmlParseFile (GST_CACHE_DIR "/compreg.xml");
} else {
exit (1);
}
rootnode = doc->xmlRootNode;
elementnode = rootnode->xmlChildrenNode;
while (elementnode) {
if (!strcmp (elementnode->name, "element")) {
element = g_new0 (comp_element, 1);
propnode = elementnode->xmlChildrenNode;
while (propnode) {
if (!strcmp (propnode->name, "name")) {
element->name = xmlNodeGetContent (propnode);
/* fprintf(stderr,element->name); */
} else if (!strcmp (propnode->name, "srcpad")) {
element->srcpads =
g_slist_prepend (element->srcpads, xmlNodeGetContent (propnode));
/* fprintf(stderr,"."); */
} else if (!strcmp (propnode->name, "sinkpad")) {
element->sinkpads =
g_slist_prepend (element->sinkpads, xmlNodeGetContent (propnode));
} else if (!strcmp (propnode->name, "srcpadtemplate")) {
element->srcpadtemplates =
g_slist_prepend (element->srcpadtemplates,
xmlNodeGetContent (propnode));
/* fprintf(stderr,"."); */
} else if (!strcmp (propnode->name, "sinkpad")) {
element->sinkpadtemplates =
g_slist_prepend (element->sinkpadtemplates,
xmlNodeGetContent (propnode));
} else if (!strcmp (propnode->name, "argument")) {
argument = g_new0 (comp_argument, 1);
argument->name = xmlNodeGetContent (propnode);
argument->type = ARG_INT;
/* walk through the values data */
argnode = propnode->xmlChildrenNode;
while (argnode) {
if (!strcmp (argnode->name, "filename")) {
argument->type = ARG_FILENAME;
} else if (!strcmp (argnode->name, "option")) {
argument->type = ARG_ENUM;
option = g_new0 (enum_value, 1);
sscanf (xmlNodeGetContent (argnode), "%d", &option->value);
argument->enums = g_slist_prepend (argument->enums, option);
}
argnode = argnode->next;
}
element->arguments = g_slist_prepend (element->arguments, argument);
}
propnode = propnode->next;
}
element_list = g_list_prepend (element_list, element);
element_names = g_slist_prepend (element_names, element->name);
}
elementnode = elementnode->next;
}
/***** Completion *****/
/* The bulk of the work is in deciding exactly which words are an option. */
/* if we're right at the beginning, with -launch in the first word */
if (strstr (prev_word, "-launch")) {
/* print out only elements with no sink pad or padtemplate */
elements = element_list;
while (elements) {
element = (comp_element *) (elements->data);
if (!element->sinkpads && !element->sinkpadtemplates)
words = g_slist_prepend (words, element->name);
elements = g_list_next (elements);
}
}
/* if the previous word is a connection */
if (strchr (prev_word, '!')) {
/* print out oly elements with a sink pad or template */
elements = element_list;
while (elements) {
element = (comp_element *) (elements->data);
if (element->sinkpads || element->sinkpadtemplates)
words = g_slist_prepend (words, element->name);
elements = g_list_next (elements);
}
}
/* if the partial word is an argument, and it's an enum */
if (strchr (prev_word, '=')) {
fprintf (stderr, "it's an arg, but dunno what element yet\n");
}
/* if the previous word is an element, we need to list both pads and arguments */
if ((elements =
g_list_find_custom (element_list, prev_word,
(GCompareFunc) match_element))) {
element = elements->data;
/* zero the numpads list so we can count them */
num_pads = 0;
/* pads */
pads = element->srcpads;
while (pads) {
num_pads++;
words =
g_slist_prepend (words, g_strdup_printf ("%s!",
(gchar *) (pads->data)));
pads = g_slist_next (pads);
}
/* padtemplates */
pads = element->srcpadtemplates;
while (pads) {
num_pads++;
word = g_strdup_printf ("%s!", (gchar *) (pads->data));
if (!g_slist_find_custom (words, word, (GCompareFunc) strcmp))
words = g_slist_prepend (words, word);
pads = g_slist_next (pads);
}
/* if there is only one pad, add '!' to the list of completions */
if (num_pads == 1) {
words = g_slist_prepend (words, "!");
}
/* arguments */
args = element->arguments;
while (args) {
argument = (comp_argument *) (args->data);
word = strstr (argument->name, "::") + 2;
words = g_slist_prepend (words, g_strdup_printf ("%s=", word));
words = g_slist_prepend (words, g_strdup_printf ("%s=...", word));
args = g_slist_next (args);
}
}
/* The easy part is ouptuting the correct list of possibilities. */
print_match_list (partial_word, partial_len, words);
return 0;
}
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