/**
* Adds an imagemap entry to the list
*
* \param n The xmlNode representing the entry to add
* \param base_url Base URL for resolving relative URLs
* \param entry Pointer to list of entries
* \return false on memory exhaustion, true otherwise
*/
bool imagemap_addtolist(xmlNode *n, nsurl *base_url,
struct mapentry **entry)
{
char *shape, *coords = NULL, *href, *target = NULL;
struct mapentry *new_map, *temp;
assert(n != NULL);
assert(base_url != NULL);
assert(entry != NULL);
if (strcmp((const char *) n->name, "area") == 0) {
xmlChar *nohref = xmlGetProp(n, (const xmlChar *) "nohref");
if (nohref != NULL) {
/* nohref attribute present - ignore this entry */
xmlFree(nohref);
return true;
}
}
/* no href -> ignore */
if ((href = (char *) xmlGetProp(n, (const xmlChar *) "href")) == NULL) {
return true;
}
target = (char *) xmlGetProp(n, (const xmlChar *) "target");
/* no shape -> shape is a rectangle */
if ((shape = (char *) xmlGetProp(n,
(const xmlChar *) "shape")) == NULL) {
shape = (char *) xmlMemStrdup("rect");
}
if (strcasecmp(shape, "default") != 0) {
/* no coords -> ignore */
if ((coords = (char *) xmlGetProp(n,
(const xmlChar *) "coords")) == NULL) {
if (target)
xmlFree(target);
xmlFree(href);
xmlFree(shape);
return true;
}
}
new_map = calloc(1, sizeof(*new_map));
if (new_map == NULL) {
if (target)
xmlFree(target);
xmlFree(href);
xmlFree(shape);
if (coords)
xmlFree(coords);
return false;
}
/* extract area shape */
if (strcasecmp(shape, "rect") == 0 ||
strcasecmp(shape, "rectangle") == 0) {
new_map->type = IMAGEMAP_RECT;
} else if (strcasecmp(shape, "circle") == 0) {
new_map->type = IMAGEMAP_CIRCLE;
} else if (strcasecmp(shape, "poly") == 0 ||
strcasecmp(shape, "polygon") == 0) {
/* polygon shape name is not valid but sites use it */
new_map->type = IMAGEMAP_POLY;
} else if (strcasecmp(shape, "default") == 0) {
new_map->type = IMAGEMAP_DEFAULT;
} else { /* unknown shape -> bail */
free(new_map);
if (target)
xmlFree(target);
xmlFree(href);
xmlFree(shape);
if (coords)
xmlFree(coords);
return true;
}
if (box_extract_link(href, base_url, &new_map->url) == false) {
free(new_map);
if (target)
xmlFree(target);
xmlFree(href);
xmlFree(shape);
if (coords)
xmlFree(coords);
return false;
}
if (new_map->url == NULL) {
/* non-fatal error -> ignore this entry */
free(new_map);
if (target)
xmlFree(target);
xmlFree(href);
xmlFree(shape);
if (coords)
xmlFree(coords);
return true;
}
if (target) {
new_map->target = strdup(target);
if (new_map->target == NULL) {
nsurl_unref(new_map->url);
free(new_map);
xmlFree(target);
xmlFree(href);
xmlFree(shape);
if (coords)
xmlFree(coords);
return false;
}
/* no longer needed */
xmlFree(target);
}
if (new_map->type != IMAGEMAP_DEFAULT) {
int x, y;
float *xcoords, *ycoords;
/* coordinates are a comma-separated list of values */
char *val = strtok(coords, ",");
int num = 1;
switch (new_map->type) {
case IMAGEMAP_RECT:
/* (left, top, right, bottom) */
while (val != NULL && num <= 4) {
switch (num) {
case 1:
new_map->bounds.rect.x0 = atoi(val);
break;
case 2:
new_map->bounds.rect.y0 = atoi(val);
break;
case 3:
new_map->bounds.rect.x1 = atoi(val);
break;
case 4:
new_map->bounds.rect.y1 = atoi(val);
break;
}
num++;
val = strtok('\0', ",");
}
break;
case IMAGEMAP_CIRCLE:
/* (x, y, radius ) */
while (val != NULL && num <= 3) {
switch (num) {
case 1:
new_map->bounds.circle.x = atoi(val);
break;
case 2:
new_map->bounds.circle.y = atoi(val);
break;
case 3:
new_map->bounds.circle.r = atoi(val);
break;
}
num++;
val = strtok('\0', ",");
}
break;
case IMAGEMAP_POLY:
new_map->bounds.poly.xcoords = NULL;
new_map->bounds.poly.ycoords = NULL;
while (val != NULL) {
x = atoi(val);
val = strtok('\0', ",");
if (val == NULL)
break;
y = atoi(val);
xcoords = realloc(new_map->bounds.poly.xcoords,
num * sizeof(float));
if (xcoords == NULL) {
free(new_map->bounds.poly.ycoords);
free(new_map->bounds.poly.xcoords);
free(new_map->target);
nsurl_unref(new_map->url);
free(new_map);
xmlFree(href);
xmlFree(shape);
xmlFree(coords);
return false;
}
ycoords = realloc(new_map->bounds.poly.ycoords,
num * sizeof(float));
if (ycoords == NULL) {
free(xcoords);
free(new_map->bounds.poly.ycoords);
free(new_map->bounds.poly.xcoords);
free(new_map->target);
nsurl_unref(new_map->url);
free(new_map);
xmlFree(href);
xmlFree(shape);
xmlFree(coords);
return false;
}
new_map->bounds.poly.xcoords = xcoords;
new_map->bounds.poly.ycoords = ycoords;
new_map->bounds.poly.xcoords[num - 1] = x;
new_map->bounds.poly.ycoords[num - 1] = y;
num++;
val = strtok('\0', ",");
}
new_map->bounds.poly.num = num - 1;
break;
default:
break;
}
}
new_map->next = NULL;
if (entry && *entry) {
/* add to END of list */
for (temp = (*entry); temp->next != NULL; temp = temp->next)
;
temp->next = new_map;
}
else {
(*entry) = new_map;
}
xmlFree(href);
xmlFree(shape);
if (coords)
xmlFree(coords);
return true;
}
/**
* Adds an imagemap entry to the list
*
* \param c The html content that the imagemap belongs to
* \param n The xmlNode representing the entry to add
* \param base_url Base URL for resolving relative URLs
* \param entry Pointer to list of entries
* \param tagtype The type of tag
* \return false on memory exhaustion, true otherwise
*/
static bool
imagemap_addtolist(const struct html_content *c, dom_node *n, nsurl *base_url,
struct mapentry **entry, dom_string *tagtype)
{
dom_exception exc;
dom_string *href = NULL, *target = NULL, *shape = NULL;
dom_string *coords = NULL;
struct mapentry *new_map, *temp;
bool ret = true;
if (dom_string_caseless_isequal(tagtype, corestring_dom_area)) {
bool nohref = false;
exc = dom_element_has_attribute(n,
corestring_dom_nohref, &nohref);
if ((exc != DOM_NO_ERR) || nohref)
/* Skip <area nohref="anything" /> */
goto ok_out;
}
exc = dom_element_get_attribute(n, corestring_dom_href, &href);
if (exc != DOM_NO_ERR || href == NULL) {
/* No href="" attribute, skip this element */
goto ok_out;
}
exc = dom_element_get_attribute(n, corestring_dom_target, &target);
if (exc != DOM_NO_ERR) {
goto ok_out;
}
exc = dom_element_get_attribute(n, corestring_dom_shape, &shape);
if (exc != DOM_NO_ERR) {
goto ok_out;
}
/* If there's no shape, we default to rectangles */
if (shape == NULL)
shape = dom_string_ref(corestring_dom_rect);
if (!dom_string_caseless_lwc_isequal(shape, corestring_lwc_default)) {
/* If not 'default' and there's no 'coords' give up */
exc = dom_element_get_attribute(n, corestring_dom_coords,
&coords);
if (exc != DOM_NO_ERR || coords == NULL) {
goto ok_out;
}
}
new_map = calloc(1, sizeof(*new_map));
if (new_map == NULL) {
goto bad_out;
}
if (dom_string_caseless_lwc_isequal(shape, corestring_lwc_rect) ||
dom_string_caseless_lwc_isequal(shape, corestring_lwc_rectangle))
new_map->type = IMAGEMAP_RECT;
else if (dom_string_caseless_lwc_isequal(shape, corestring_lwc_circle))
new_map->type = IMAGEMAP_CIRCLE;
else if (dom_string_caseless_lwc_isequal(shape, corestring_lwc_poly) ||
dom_string_caseless_lwc_isequal(shape, corestring_lwc_polygon))
new_map->type = IMAGEMAP_POLY;
else if (dom_string_caseless_lwc_isequal(shape, corestring_lwc_default))
new_map->type = IMAGEMAP_DEFAULT;
else
goto bad_out;
if (box_extract_link(c, href, base_url, &new_map->url) == false)
goto bad_out;
if (new_map->url == NULL) {
/* non-fatal error -> ignore this */
goto ok_free_map_out;
}
if (target != NULL) {
/* Copy target into the map */
new_map->target = malloc(dom_string_byte_length(target) + 1);
if (new_map->target == NULL)
goto bad_out;
/* Safe, but relies on dom_strings being NULL terminated */
/* \todo Do this better */
strcpy(new_map->target, dom_string_data(target));
}
if (new_map->type != IMAGEMAP_DEFAULT) {
int x, y;
float *xcoords, *ycoords;
/* coordinates are a comma-separated list of values */
char *val = strtok((char *)dom_string_data(coords), ",");
int num = 1;
switch (new_map->type) {
case IMAGEMAP_RECT:
/* (left, top, right, bottom) */
while (val != NULL && num <= 4) {
switch (num) {
case 1:
new_map->bounds.rect.x0 = atoi(val);
break;
case 2:
new_map->bounds.rect.y0 = atoi(val);
break;
case 3:
new_map->bounds.rect.x1 = atoi(val);
break;
case 4:
new_map->bounds.rect.y1 = atoi(val);
break;
}
num++;
val = strtok(NULL, ",");
}
break;
case IMAGEMAP_CIRCLE:
/* (x, y, radius ) */
while (val != NULL && num <= 3) {
switch (num) {
case 1:
new_map->bounds.circle.x = atoi(val);
break;
case 2:
new_map->bounds.circle.y = atoi(val);
break;
case 3:
new_map->bounds.circle.r = atoi(val);
break;
}
num++;
val = strtok(NULL, ",");
}
break;
case IMAGEMAP_POLY:
new_map->bounds.poly.xcoords = NULL;
new_map->bounds.poly.ycoords = NULL;
while (val != NULL) {
x = atoi(val);
val = strtok(NULL, ",");
if (val == NULL)
break;
y = atoi(val);
xcoords = realloc(new_map->bounds.poly.xcoords,
num * sizeof(float));
if (xcoords == NULL) {
goto bad_out;
}
new_map->bounds.poly.xcoords = xcoords;
ycoords = realloc(new_map->bounds.poly.ycoords,
num * sizeof(float));
if (ycoords == NULL) {
goto bad_out;
}
new_map->bounds.poly.ycoords = ycoords;
new_map->bounds.poly.xcoords[num - 1] = x;
new_map->bounds.poly.ycoords[num - 1] = y;
num++;
val = strtok(NULL, ",");
}
new_map->bounds.poly.num = num - 1;
break;
default:
break;
}
}
new_map->next = NULL;
if (*entry) {
/* add to END of list */
for (temp = (*entry); temp->next != NULL; temp = temp->next)
;
temp->next = new_map;
} else {
(*entry) = new_map;
}
/* All good, linked in, let's clean up */
goto ok_out;
bad_out:
ret = false;
ok_free_map_out:
if (new_map != NULL) {
if (new_map->url != NULL)
nsurl_unref(new_map->url);
if (new_map->type == IMAGEMAP_POLY &&
new_map->bounds.poly.ycoords != NULL)
free(new_map->bounds.poly.ycoords);
if (new_map->type == IMAGEMAP_POLY &&
new_map->bounds.poly.xcoords != NULL)
free(new_map->bounds.poly.xcoords);
if (new_map->target != NULL)
free(new_map->target);
free(new_map);
}
ok_out:
if (href != NULL)
dom_string_unref(href);
if (target != NULL)
dom_string_unref(target);
if (shape != NULL)
dom_string_unref(shape);
if (coords != NULL)
dom_string_unref(coords);
return ret;
}