com.sun.glass.ui.monocle.TouchPipeline Maven / Gradle / Ivy
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*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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package com.sun.glass.ui.monocle;
import java.util.ArrayList;
class TouchPipeline {
private TouchInput touch = TouchInput.getInstance();
private ArrayList filters = new ArrayList<>();
private TouchState flushState = new TouchState();
/**
* Adds the filters in the given pipeline to this pipeline
*/
void add(TouchPipeline pipeline) {
for (int i = 0; i < pipeline.filters.size(); i++) {
addFilter(pipeline.filters.get(i));
}
}
/**
* Attempts to add the filters named in the comma-separated list provided.
*/
void addNamedFilters(String filterNameList) {
String[] touchFilterNames = filterNameList.split(",");
if (touchFilterNames != null) {
for (String touchFilterName : touchFilterNames) {
String s = touchFilterName.trim();
if (s.length() > 0) {
addNamedFilter(s);
}
}
}
}
void addNamedFilter(String filterName) {
try {
// install known filters without reflection
if (filterName.equals("SmallMove")) {
addFilter(new SmallMoveTouchFilter());
} else if (filterName.equals("NearbyPoints")) {
addFilter(new NearbyPointsTouchFilter());
} else if (filterName.equals("AssignPointID")) {
addFilter(new AssignPointIDTouchFilter());
} else {
Class cls;
if (!filterName.contains(".")) {
filterName = "com.sun.glass.ui.monocle."
+ filterName + "TouchFilter";
}
ClassLoader loader = Thread.currentThread().getContextClassLoader();
addFilter((TouchFilter) loader.loadClass(filterName).getDeclaredConstructor().newInstance());
}
} catch (Exception e) {
System.err.println(
"Cannot install touch filter '" + filterName + "'");
e.printStackTrace();
}
}
void addFilter(TouchFilter filter) {
int priority = filter.getPriority();
int i;
for (i = 0; i < filters.size(); i++) {
if (filters.get(i).equals(filter)) {
return;
}
if (filters.get(i).getPriority() < priority) {
break;
}
}
filters.add(i, filter);
}
boolean filter(TouchState state) {
for (int i = 0; i < filters.size(); i++) {
TouchFilter filter = filters.get(i);
if (MonocleSettings.settings.traceEventsVerbose) {
MonocleTrace.traceEvent("Applying %s to %s", filter, state);
}
if (filter.filter(state)) {
return true;
}
}
return false;
}
void pushState(TouchState state) {
if (MonocleSettings.settings.traceEventsVerbose) {
MonocleTrace.traceEvent("Pushing %s to %s", state, this);
}
if (!filter(state)) {
touch.setState(state);
}
}
/** Flushes any remaining data in the pipeline, possibly pushing more
* state objects to TouchInput.
*/
void flush() {
for (int i = 0; i < filters.size(); i++) {
TouchFilter filter = filters.get(i);
while (filter.flush(flushState)) {
if (MonocleSettings.settings.traceEventsVerbose) {
MonocleTrace.traceEvent("Flushing %s from %s", flushState, filter);
}
boolean consumed = false;
for (int j = i + 1; j < filters.size() && !consumed; j++) {
consumed = filters.get(j).filter(flushState);
}
if (!consumed) {
touch.setState(flushState);
}
}
}
}
@Override
public String toString() {
StringBuffer sb = new StringBuffer("TouchPipeline[");
for (int i = 0; i < filters.size(); i++) {
sb.append(filters.get(i));
if (i < filters.size() - 1) {
sb.append(" -> ");
}
}
sb.append("]");
return sb.toString();
}
}