/**
* Add an imagemap to the hashtable, creating it if it doesn't exist
*
* \param c The containing content
* \param key The name of the imagemap
* \param list List of map regions
* \return true on succes, false otherwise
*/
bool imagemap_add(html_content *c, const char *key, struct mapentry *list)
{
struct imagemap *map;
unsigned int slot;
assert(c != NULL);
assert(key != NULL);
assert(list != NULL);
if (imagemap_create(c) == false)
return false;
map = calloc(1, sizeof(*map));
if (map == NULL)
return false;
map->key = strdup(key);
if (map->key == NULL) {
free(map);
return false;
}
map->list = list;
slot = imagemap_hash(key);
map->next = c->imagemaps[slot];
c->imagemaps[slot] = map;
return true;
}
/**
* Add an imagemap to the hashtable, creating it if it doesn't exist
*
* \param c The containing content
* \param key The name of the imagemap
* \param list List of map regions
* \return true on succes, false otherwise
*/
static bool
imagemap_add(html_content *c, dom_string *key, struct mapentry *list)
{
struct imagemap *map;
unsigned int slot;
assert(c != NULL);
assert(key != NULL);
assert(list != NULL);
if (imagemap_create(c) == false)
return false;
map = calloc(1, sizeof(*map));
if (map == NULL)
return false;
/* \todo Stop relying on NULL termination of dom_string */
map->key = strdup(dom_string_data(key));
if (map->key == NULL) {
free(map);
return false;
}
map->list = list;
slot = imagemap_hash(map->key);
map->next = c->imagemaps[slot];
c->imagemaps[slot] = map;
return true;
}
/**
* Retrieve url associated with imagemap entry
*
* \param h The containing content
* \param key The map name to search for
* \param x The left edge of the containing box
* \param y The top edge of the containing box
* \param click_x The horizontal location of the click
* \param click_y The vertical location of the click
* \param target Pointer to location to receive target pointer (if any)
* \return The url associated with this area, or NULL if not found
*/
nsurl *imagemap_get(struct html_content *c, const char *key,
unsigned long x, unsigned long y,
unsigned long click_x, unsigned long click_y,
const char **target)
{
unsigned int slot = 0;
struct imagemap *map;
struct mapentry *entry;
unsigned long cx, cy;
assert(c != NULL);
if (key == NULL)
return NULL;
if (c->imagemaps == NULL)
return NULL;
slot = imagemap_hash(key);
for (map = c->imagemaps[slot]; map != NULL; map = map->next) {
if (map->key != NULL && strcasecmp(map->key, key) == 0)
break;
}
if (map == NULL || map->list == NULL)
return NULL;
for (entry = map->list; entry; entry = entry->next) {
switch (entry->type) {
case IMAGEMAP_DEFAULT:
/* just return the URL. no checks required */
if (target)
*target = entry->target;
return entry->url;
break;
case IMAGEMAP_RECT:
if (click_x >= x + entry->bounds.rect.x0 &&
click_x <= x + entry->bounds.rect.x1 &&
click_y >= y + entry->bounds.rect.y0 &&
click_y <= y + entry->bounds.rect.y1) {
if (target)
*target = entry->target;
return entry->url;
}
break;
case IMAGEMAP_CIRCLE:
cx = x + entry->bounds.circle.x - click_x;
cy = y + entry->bounds.circle.y - click_y;
if ((cx * cx + cy * cy) <=
(unsigned long) (entry->bounds.circle.r *
entry->bounds.circle.r)) {
if (target)
*target = entry->target;
return entry->url;
}
break;
case IMAGEMAP_POLY:
if (imagemap_point_in_poly(entry->bounds.poly.num,
entry->bounds.poly.xcoords,
entry->bounds.poly.ycoords, x, y,
click_x, click_y)) {
if (target)
*target = entry->target;
return entry->url;
}
break;
}
}
if (target)
*target = NULL;
return NULL;
}
