protected boolean onBeginListeningQuery(BeginListeningQuery query) {
NullCheck.notNull(query, "query");
final int index = selectedIndex();
if (index < 0) return false;
final int count = model.getItemCount();
if (index >= count) return false;
final Object current = model.getItem(index);
final String text =
appearance
.getScreenAppearance(current, NONE_APPEARANCE_FLAGS)
.substring(hotPointX, appearance.getObservableRightBound(current));
// Log.debug("listen", appearance.getScreenAppearance(current, NONE_APPEARANCE_FLAGS));
// Log.debug("listen", "" + hotPointX);
if (text.isEmpty() && index + 1 >= count) return false;
if (index + 1 < count) {
final Object next = model.getItem(index + 1);
query.answer(
new BeginListeningQuery.Answer(
text, new ListeningInfo(index + 1, appearance.getObservableLeftBound(next))));
} else
query.answer(
new BeginListeningQuery.Answer(
text, new ListeningInfo(index, appearance.getObservableRightBound(current))));
return true;
}
private boolean onAltLeft(KeyboardEvent event) {
if (noContent()) return true;
final Object item = selected();
if (item == null) {
environment.hint(Hints.EMPTY_LINE);
return true;
}
final String line = appearance.getScreenAppearance(item, NONE_APPEARANCE_FLAGS);
NullCheck.notNull(line, "line");
if (line.isEmpty()) {
environment.hint(Hints.EMPTY_LINE);
return true;
}
final int leftBound = appearance.getObservableLeftBound(item);
final int rightBound = appearance.getObservableRightBound(item);
if (hotPointX <= leftBound) {
environment.hint(Hints.BEGIN_OF_LINE);
return true;
}
final String subline = line.substring(leftBound, rightBound);
final WordIterator it = new WordIterator(subline, hotPointX - leftBound);
if (!it.stepBackward()) {
environment.hint(Hints.BEGIN_OF_LINE);
return true;
}
hotPointX = it.pos() + leftBound;
environment.say(it.announce());
environment.onAreaNewHotPoint(this);
return true;
}
protected boolean onChar(KeyboardEvent event) {
if (noContent()) return true;
final int count = model.getItemCount();
final char c = event.getChar();
final String beginning;
if (selected() != null) {
if (hotPointX >= appearance.getObservableRightBound(selected())) return false;
final String name = getObservableSubstr(selected());
final int pos =
Math.min(hotPointX - appearance.getObservableLeftBound(selected()), name.length());
if (pos < 0) return false;
beginning = name.substring(0, pos);
} else beginning = "";
Log.debug("list", "beginning:" + beginning);
final String mustBegin = beginning + c;
for (int i = 0; i < count; ++i) {
Log.debug("list", "checking:" + i);
final String name = getObservableSubstr(model.getItem(i));
Log.debug("list", "name:" + name);
if (!name.startsWith(mustBegin)) continue;
hotPointY = getLineIndexByItemIndex(i);
Log.debug("list", "hotPointY:" + hotPointY);
++hotPointX;
appearance.announceItem(model.getItem(hotPointY), NONE_APPEARANCE_FLAGS);
environment.onAreaNewHotPoint(this);
return true;
}
return false;
}
protected boolean onMoveHotPoint(MoveHotPointEvent event) {
NullCheck.notNull(event, "event");
final int x = event.getNewHotPointX();
final int y = event.getNewHotPointY();
final int newY;
if (y >= getLineCount()) {
if (event.precisely()) return false;
newY = getLineCount() - 1;
} else newY = y;
if (getItemIndexOnLine(newY) >= 0) {
// Line with item, not empty
final Object item = model.getItem(getItemIndexOnLine(newY));
final int leftBound = appearance.getObservableLeftBound(item);
final int rightBound = appearance.getObservableRightBound(item);
if (event.precisely() && (x < leftBound || x > rightBound)) return false;
hotPointY = newY;
hotPointX = x;
if (hotPointX < leftBound) hotPointX = leftBound;
if (hotPointX > rightBound) hotPointX = rightBound;
environment.onAreaNewHotPoint(this);
return true;
}
// On empty line
hotPointY = newY;
hotPointX = 0;
environment.onAreaNewHotPoint(this);
return true;
}
protected String getObservableSubstr(Object item) {
NullCheck.notNull(item, "item");
final String line = appearance.getScreenAppearance(item, NONE_APPEARANCE_FLAGS);
NullCheck.notNull(line, "line");
if (line.isEmpty()) return "";
final int leftBound = Math.min(appearance.getObservableLeftBound(item), line.length());
final int rightBound = Math.min(appearance.getObservableRightBound(item), line.length());
if (leftBound >= rightBound) return "";
return line.substring(leftBound, rightBound);
}
private boolean onAltHome(KeyboardEvent event) {
if (noContent()) return true;
final Object item = selected();
NullCheck.notNull(item, "item");
final String line = appearance.getScreenAppearance(item, NONE_APPEARANCE_FLAGS);
NullCheck.notNull(line, "line");
hotPointX = appearance.getObservableLeftBound(item);
announceChar(line, hotPointX, appearance.getObservableRightBound(item));
environment.onAreaNewHotPoint(this);
return true;
}
private boolean onAltEnd(KeyboardEvent event) {
if (noContent()) return true;
final Object item = selected();
if (item == null) {
environment.hint(Hints.EMPTY_LINE);
return true;
}
final String line = appearance.getScreenAppearance(item, NONE_APPEARANCE_FLAGS);
NullCheck.notNull(line, "line");
hotPointX = appearance.getObservableRightBound(item);
environment.hint(Hints.END_OF_LINE);
environment.onAreaNewHotPoint(this);
return true;
}
protected boolean onListeningFinishedEvent(ListeningFinishedEvent event) {
NullCheck.notNull(event, "event");
if (!(event.getExtraInfo() instanceof ListeningInfo)) return false;
final ListeningInfo info = (ListeningInfo) event.getExtraInfo();
final int count = model.getItemCount();
if (info.itemIndex >= count) return false;
final Object item = model.getItem(info.itemIndex);
final int leftBound = appearance.getObservableLeftBound(item);
final int rightBound = appearance.getObservableRightBound(item);
if (info.pos < leftBound || info.pos > rightBound) return false;
hotPointY = getLineIndexByItemIndex(info.itemIndex);
hotPointX = info.pos;
environment.onAreaNewHotPoint(this);
return true;
}
protected boolean onArrowRight(KeyboardEvent event) {
if (noContent()) return true;
final Object item = selected();
NullCheck.notNull(item, "item");
final String line = appearance.getScreenAppearance(item, NONE_APPEARANCE_FLAGS);
NullCheck.notNull(line, "line");
if (line.isEmpty()) {
environment.hint(Hints.EMPTY_LINE);
return true;
}
final int rightBound = appearance.getObservableRightBound(item);
if (hotPointX >= rightBound) {
environment.hint(Hints.END_OF_LINE);
return true;
}
++hotPointX;
announceChar(line, hotPointX, rightBound);
environment.onAreaNewHotPoint(this);
return true;
}