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package com.mapbox.mapboxsdk.maps;
import android.graphics.Bitmap;
import android.support.annotation.NonNull;
import com.mapbox.mapboxsdk.Mapbox;
import com.mapbox.mapboxsdk.annotations.Icon;
import com.mapbox.mapboxsdk.annotations.IconFactory;
import com.mapbox.mapboxsdk.annotations.Marker;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* Responsible for managing icons added to the Map.
* <p>
* Maintains a {@link List} of {@link Icon} and is responsible for initialising default markers.
* </p>
* <p>
* Keep track of icons added and the resulting average icon size. This is used internally by our
* gestures detection to calculate the size of a touch target.
* </p>
*/
class IconManager {
private final Map<Icon, Integer> iconMap = new HashMap<>();
private NativeMap nativeMap;
private int highestIconWidth;
private int highestIconHeight;
IconManager(NativeMap nativeMap) {
this.nativeMap = nativeMap;
}
Icon loadIconForMarker(@NonNull Marker marker) {
Icon icon = marker.getIcon();
if (icon == null) {
// TODO replace with anchor implementation, we are faking an anchor by adding extra pixels and diving height by 2
icon = loadDefaultIconForMarker(marker);
} else {
updateHighestIconSize(icon);
}
addIcon(icon);
return icon;
}
int getTopOffsetPixelsForIcon(@NonNull Icon icon) {
return (int) (nativeMap.getTopOffsetPixelsForAnnotationSymbol(icon.getId()) * nativeMap.getPixelRatio());
}
int getHighestIconWidth() {
return highestIconWidth;
}
int getHighestIconHeight() {
return highestIconHeight;
}
private Icon loadDefaultIconForMarker(Marker marker) {
Icon icon = IconFactory.getInstance(Mapbox.getApplicationContext()).defaultMarker();
Bitmap bitmap = icon.getBitmap();
updateHighestIconSize(bitmap.getWidth(), bitmap.getHeight() / 2);
marker.setIcon(icon);
return icon;
}
private void addIcon(@NonNull Icon icon) {
addIcon(icon, true);
}
private void addIcon(@NonNull Icon icon, boolean addIconToMap) {
if (!iconMap.keySet().contains(icon)) {
iconMap.put(icon, 1);
if (addIconToMap) {
loadIcon(icon);
}
} else {
iconMap.put(icon, iconMap.get(icon) + 1);
}
}
private void updateHighestIconSize(Icon icon) {
updateHighestIconSize(icon.getBitmap());
}
private void updateHighestIconSize(Bitmap bitmap) {
updateHighestIconSize(bitmap.getWidth(), bitmap.getHeight());
}
private void updateHighestIconSize(int width, int height) {
if (width > highestIconWidth) {
highestIconWidth = width;
}
if (height > highestIconHeight) {
highestIconHeight = height;
}
}
private void loadIcon(Icon icon) {
Bitmap bitmap = icon.getBitmap();
nativeMap.addAnnotationIcon(icon.getId(),
bitmap.getWidth(),
bitmap.getHeight(),
icon.getScale(),
icon.toBytes());
}
void reloadIcons() {
for (Icon icon : iconMap.keySet()) {
loadIcon(icon);
}
}
void ensureIconLoaded(@NonNull Marker marker, @NonNull MapboxMap mapboxMap) {
Icon icon = marker.getIcon();
if (icon == null) {
icon = loadDefaultIconForMarker(marker);
}
addIcon(icon);
setTopOffsetPixels(marker, mapboxMap, icon);
}
private void setTopOffsetPixels(Marker marker, @NonNull MapboxMap mapboxMap, @NonNull Icon icon) {
// this seems to be a costly operation according to the profiler so I'm trying to save some calls
Marker previousMarker = marker.getId() != -1 ? (Marker) mapboxMap.getAnnotation(marker.getId()) : null;
if (previousMarker == null || previousMarker.getIcon() == null || previousMarker.getIcon() != marker.getIcon()) {
marker.setTopOffsetPixels(getTopOffsetPixelsForIcon(icon));
}
}
void iconCleanup(@NonNull Icon icon) {
Integer refCounter = iconMap.get(icon);
if (refCounter != null) {
refCounter--;
if (refCounter == 0) {
remove(icon);
} else {
updateIconRefCounter(icon, refCounter);
}
}
}
private void remove(Icon icon) {
nativeMap.removeAnnotationIcon(icon.getId());
iconMap.remove(icon);
}
private void updateIconRefCounter(Icon icon, int refCounter) {
iconMap.put(icon, refCounter);
}
}
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