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#include <stdio.h>
#include <string.h>
#include <parser.h> // NOTE: this is xml-config's fault
// Include compatability defines: if libxml hasn't already defined these,
// we have an old version 1.x
#ifndef xmlChildrenNode
#define xmlChildrenNode childs
#define xmlRootNode root
#endif
#include <glib.h>
#include "config.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 = argv[3];
gchar *partial_word = argv[2];
int partial_len = strlen(partial_word);
GList *elements;
GSList *pads;
int num_pads;
GSList *args;
gchar *word;
GSList *words = NULL;
/***** Loading the completion information from the registry *****/
doc = xmlParseFile (GST_CONFIG_DIR "/compreg.xml");
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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