/**
* getting the image representing a resource given the id of a resource
*
* @param svgHandle a svg handle
* @param resourceId the id of the resource from which the image has been created
* @param useSmallImage whether the returned image should be small or large
* @return the image representing the resource
*/
public Image getImage(SVGHandle svgHandle, String resourceId, boolean useSmallImage) {
Image image = null;
if (svgHandle != null && resourceId != null && !resourceId.equals("")) {
Map<String, ImageRepresentation> idToImageMap = null;
if (handleToIdToImages.containsKey(svgHandle)) {
idToImageMap = handleToIdToImages.get(svgHandle);
if (idToImageMap.containsKey(resourceId)) {
ImageRepresentation imageRepresentation = idToImageMap.get(resourceId);
if (imageRepresentation != null) {
if (useSmallImage) {
image = imageRepresentation.getSmallImage();
} else {
image = imageRepresentation.getLargeImage();
}
}
}
}
}
return image;
}
/**
* invalidates the representation of a resource
*
* @param svgHandle a svg handle
* @param resourceId the id of a resource node
*/
public void invalidateResourceRepresentation(SVGHandle svgHandle, String resourceId) {
if (resourceId != null && svgHandle != null) {
Map<String, ImageRepresentation> idToImageMap = null;
if (handleToIdToImages.containsKey(svgHandle)) {
idToImageMap = handleToIdToImages.get(svgHandle);
if (idToImageMap != null) {
// removes the id in the map
synchronized (this) {
idToImageMap.remove(resourceId);
}
}
}
}
}
/**
* getting the image representing a resource given the id of a resource
*
* @param svgHandle a svg handle
* @param resourceId the id of the resource from which the image has been created
* @return the image representation object representing the resource
*/
public ImageRepresentation getResourceImage(SVGHandle svgHandle, String resourceId) {
ImageRepresentation imageRepresentation = null;
if (svgHandle != null && resourceId != null && !resourceId.equals("")) {
Map<String, ImageRepresentation> idToImageMap = null;
if (handleToIdToImages.containsKey(svgHandle)) {
idToImageMap = handleToIdToImages.get(svgHandle);
if (idToImageMap.containsKey(resourceId)) {
imageRepresentation = idToImageMap.get(resourceId);
}
}
}
return imageRepresentation;
}
/**
* creates a new image
*
* @param svgHandle a svg handle
* @param resourceId the id of the resource from which the image has been created
* @param image the image representing the resource
*/
protected void setImage(SVGHandle svgHandle, String resourceId, Image image) {
if (svgHandle != null && resourceId != null && image != null) {
Map<String, ImageRepresentation> idToImageMap = null;
if (handleToIdToImages.containsKey(svgHandle)) {
idToImageMap = handleToIdToImages.get(svgHandle);
} else {
idToImageMap = new HashMap<String, ImageRepresentation>();
handleToIdToImages.put(svgHandle, idToImageMap);
}
synchronized (this) {
idToImageMap.put(resourceId, new ImageRepresentation(image));
}
}
}
/**
* checks if the map associating an id to an image is consistent
*
* @param svgHandle a svg handle
*/
protected void checkResourceRepresentationsConsistency(SVGHandle svgHandle) {
if (svgHandle != null) {
Map<String, ImageRepresentation> idToImageMap = null;
if (handleToIdToImages.containsKey(svgHandle)) {
idToImageMap = handleToIdToImages.get(svgHandle);
if (idToImageMap != null) {
// getting the map associating the id of a resource to the
// resource node
LinkedList<String> resourceNames = new LinkedList<String>();
resourceNames.add("linearGradient");
resourceNames.add("radialGradient");
resourceNames.add("pattern");
resourceNames.add("marker");
Map<String, Element> resources =
svgHandle
.getSvgResourcesManager()
.getResourcesFromDefs(svgHandle.getCanvas().getDocument(), resourceNames);
for (String id : new LinkedList<String>(idToImageMap.keySet())) {
if (id != null && !id.equals("") && !resources.containsKey(id)) {
idToImageMap.remove(id);
}
}
}
}
}
}
